Use poll() instead of select() to remove limits on open file descriptors.

The support was only partial, and the whole concept is
now deprecated in the standards.

.gitignore

@@ -3,7 +3,7 @@ src/*.mo
 src/dnsmasq.pot
 src/dnsmasq
 src/dnsmasq_baseline
-src/.configured
+src/.copts_*
 contrib/wrt/dhcp_lease_time
 contrib/wrt/dhcp_release
 debian/base/

CHANGELOG

@@ -1,10 +1,193 @@
+version 2.74
+            Fix reversion in 2.73 where --conf-file would attempt to
+	    read the default file, rather than no file.
+
+	    Fix inotify code to handle dangling symlinks better and
+	    not SEGV in some circumstances.
+
+
+version 2.73
+            Fix crash at startup when an empty suffix is supplied to
+	    --conf-dir, also trivial memory leak. Thanks to 
+	    Tomas Hozza for spotting this.
+
+	    Remove floor of 4096 on advertised EDNS0 packet size when 
+	    DNSSEC in use, the original rationale for this has long gone.
+	    Thanks to Anders Kaseorg for spotting this.
+
+	    Use inotify for checking on updates to /etc/resolv.conf and
+	    friends under Linux. This fixes race conditions when the files are 
+	    updated rapidly and saves CPU by noy polling. To build
+	    a binary that runs on old Linux kernels without inotify,
+	    use make COPTS=-DNO_INOTIFY
+
+	    Fix breakage of --domain=<domain>,<subnet>,local - only reverse
+	    queries were intercepted. THis appears to have been broken 
+	    since 2.69. Thanks to Josh Stone for finding the bug.
+
+	    Eliminate IPv6 privacy addresses and deprecated addresses from
+	    the answers given by --interface-name. Note that reverse queries
+	    (ie looking for names, given addresses) are not affected. 
+	    Thanks to Michael Gorbach for the suggestion.
+
+	    Fix crash in DNSSEC code with long RRs. Thanks to Marco Davids
+	    for the bug report.
+	    
+	    Add --ignore-address option. Ignore replies to A-record 
+	    queries which include the specified address. No error is
+	    generated, dnsmasq simply continues to listen for another 
+	    reply. This is useful to defeat blocking strategies which
+	    rely on quickly supplying a forged answer to a DNS 
+	    request for certain domains, before the correct answer can
+            arrive. Thanks to Glen Huang for the patch.
+	
+	    Revisit the part of DNSSEC validation which determines if an 
+	    unsigned answer is legit, or is in some part of the DNS 
+	    tree which should be signed. Dnsmasq now works from the 
+	    DNS root downward looking for the limit of signed 
+	    delegations, rather than working bottom up. This is 
+	    both more correct, and less likely to trip over broken 
+	    nameservers in the unsigned parts of the DNS tree 
+	    which don't respond well to DNSSEC queries.
+
+	    Add --log-queries=extra option, which makes logs easier
+	    to search automatically.
+
+	    Add --min-cache-ttl option. I've resisted this for a long 
+	    time, on the grounds that disbelieving TTLs is never a 
+	    good idea, but I've been persuaded that there are 
+	    sometimes reasons to do it. (Step forward, GFW).
+	    To avoid misuse, there's a hard limit on the TTL 
+	    floor of one hour. Thansk to RinSatsuki for the patch.
+
+	    Cope with multiple interfaces with the same link-local 
+	    address. (IPv6 addresses are scoped, so this is allowed.)
+	    Thanks to Cory Benfield for help with this.
+
+	    Add --dhcp-hostsdir. This allows addition of new host
+	    configurations to a running dnsmasq instance much more 
+	    cheaply than having dnsmasq re-read all its existing
+	    configuration each time. 
+	
+	    Don't reply to DHCPv6 SOLICIT messages if we're not 
+	    configured to do stateful DHCPv6. Thanks to Win King Wan 
+	    for the patch.
+
+	    Fix broken DNSSEC validation of ECDSA signatures.
+
+	    Add --dnssec-timestamp option, which provides an automatic
+	    way to detect when the system time becomes valid after 
+	    boot on systems without an RTC, whilst allowing DNS 
+	    queries before the clock is valid so that NTP can run. 
+	    Thanks to Kevin Darbyshire-Bryant for developing this idea.
+
+	    Add --tftp-no-fail option. Thanks to Stefan Tomanek for
+	    the patch.
+
+	    Fix crash caused by looking up servers.bind, CHAOS text 
+	    record, when more than about five --servers= lines are 
+	    in the dnsmasq config. This causes memory corruption 
+	    which causes a crash later. Thanks to Matt Coddington for 
+	    sterling work chasing this down.
+
+	    Fix crash on receipt of certain malformed DNS requests.
+	    Thanks to Nick Sampanis for spotting the problem.
+	    Note that this is could allow the dnsmasq process's
+	    memory to be read by an attacker under certain
+	    circumstances, so it has a CVE, CVE-2015-3294 
+
+            Fix crash in authoritative DNS code, if a .arpa zone 
+	    is declared as authoritative, and then a PTR query which
+	    is not to be treated as authoritative arrived. Normally, 
+	    directly declaring .arpa zone as authoritative is not 
+	    done, so this crash wouldn't be seen. Instead the 
+	    relevant .arpa zone should be specified as a subnet
+	    in the auth-zone declaration. Thanks to Johnny S. Lee
+	    for the bugreport and initial patch.
+
+	    Fix authoritative DNS code to correctly reply to NS 
+	    and SOA queries for .arpa zones for which we are 
+	    declared authoritative by means of a subnet in auth-zone.
+	    Previously we provided correct answers to PTR queries
+	    in such zones (including NS and SOA) but not direct
+	    NS and SOA queries. Thanks to Johnny S. Lee for 
+ 	    pointing out the problem.
+
+	    Fix logging of DHCPREPLY which should be suppressed 
+	    by quiet-dhcp6. Thanks to J. Pablo Abonia for 
+	    spotting the problem.
+
+	    Try and handle net connections with broken fragmentation 
+	    that lose large UDP packets. If a server times out, 
+            reduce the maximum UDP packet size field in the EDNS0
+	    header to 1280 bytes. If it then answers, make that
+	    change permanent.
+
+	    Check IPv4-mapped IPv6 addresses when --stop-rebind
+	    is active. Thanks to Jordan Milne for spotting this.
+
+	    Allow DHCPv4 options T1 and T2 to be set using --dhcp-option.
+	    Thanks to Kevin Benton for patches and work on this.
+
+            Fix code for DHCPCONFIRM DHCPv6 messages to confirm addresses
+	    in the correct subnet, even of not in dynamic address 
+	    allocation range. Thanks to Steve Hirsch for spotting
+	    the problem.
+
+	    Add AddDhcpLease and DeleteDhcpLease DBus methods. Thanks
+	    to Nicolas Cavallari for the patch.
+
+	    Allow configuration of router advertisements without the 
+	    "on-link" bit set. Thanks to Neil Jerram for the patch.
+
+	    Extend --bridge-interface to DHCPv6 and router 
+	    advertisements. Thanks to Neil Jerram for the patch.
+	
+	
 version 2.72
             Add ra-advrouter mode, for RFC-3775 mobile IPv6 support.
 
 	    Add support for "ipsets" in *BSD, using pf. Thanks to 
 	    Sven Falempim for the patch.
 
+	    Fix race condition which could lock up dnsmasq when an 
+	    interface goes down and up rapidly. Thanks to Conrad 
+	    Kostecki for helping to chase this down.
 
+	    Add DBus methods SetFilterWin2KOption and SetBogusPrivOption
+	    Thanks to the Smoothwall project for the patch.
+
+	    Fix failure to build against Nettle-3.0. Thanks to Steven 
+	    Barth for spotting this and finding the fix. 
+	    
+	    When assigning existing DHCP leases to intefaces by comparing 
+	    networks, handle the case that two or more interfaces have the
+	    same network part, but different prefix lengths (favour the
+	    longer prefix length.) Thanks to Lung-Pin Chang for the 
+	    patch.
+	    
+	    Add a mode which detects and removes DNS forwarding loops, ie 
+	    a query sent to an upstream server returns as a new query to 
+	    dnsmasq, and would therefore be forwarded again, resulting in 
+	    a query which loops many times before being dropped. Upstream
+	    servers which loop back are disabled and this event is logged.
+	    Thanks to Smoothwall for their sponsorship of this feature.
+
+	    Extend --conf-dir to allow filtering of files. So
+	    --conf-dir=/etc/dnsmasq.d,\*.conf
+	    will load all the files in /etc/dnsmasq.d which end in .conf
+ 
+            Fix bug when resulted in NXDOMAIN answers instead of NODATA in
+            some circumstances.
+
+	    Fix bug which caused dnsmasq to become unresponsive if it 
+	    failed to send packets due to a network interface disappearing.
+	    Thanks to Niels Peen for spotting this.
+	    	    
+            Fix problem with --local-service option on big-endian platforms
+	    Thanks to Richard Genoud for the patch.
+
+	
 version 2.71
             Subtle change to error handling to help DNSSEC validation 
 	    when servers fail to provide NODATA answers for 

Makefile

@@ -1,4 +1,4 @@
-# dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+# dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -61,15 +61,19 @@ lua_cflags =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CON
 lua_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --libs lua5.1` 
 nettle_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC $(PKG_CONFIG) --cflags nettle hogweed`
 nettle_libs =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC $(PKG_CONFIG) --libs nettle hogweed`
-gmp_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC $(PKG_CONFIG) --copy -lgmp`
+gmp_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC NO_GMP --copy -lgmp`
 sunos_libs =    `if uname | grep SunOS >/dev/null 2>&1; then echo -lsocket -lnsl -lposix4; fi`
 version =     -DVERSION='\"`$(top)/bld/get-version $(top)`\"'
 
+sum?=$(shell $(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' ')
+sum!=$(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' '
+copts_conf = .copts_$(sum)
+
 objs = cache.o rfc1035.o util.o option.o forward.o network.o \
        dnsmasq.o dhcp.o lease.o rfc2131.o netlink.o dbus.o bpf.o \
        helper.o tftp.o log.o conntrack.o dhcp6.o rfc3315.o \
        dhcp-common.o outpacket.o radv.o slaac.o auth.o ipset.o \
-       domain.o dnssec.o blockdata.o tables.c
+       domain.o dnssec.o blockdata.o tables.o loop.o inotify.o poll.o
 
 hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
        dns-protocol.h radv-protocol.h ip6addr.h
@@ -83,7 +87,7 @@ all : $(BUILDDIR)
 
 mostly_clean :
 	rm -f $(BUILDDIR)/*.mo $(BUILDDIR)/*.pot 
-	rm -f $(BUILDDIR)/.configured $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq 
+	rm -f $(BUILDDIR)/.copts_* $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq
 
 clean : mostly_clean
 	rm -f $(BUILDDIR)/dnsmasq_baseline
@@ -113,7 +117,7 @@ install-i18n : all-i18n install-common
 	cd $(MAN); ../bld/install-man $(DESTDIR)$(MANDIR) $(INSTALL)
 
 merge : 
-	@cd $(BUILDDIR) && $(MAKE) -f $(top)/Makefile dnsmasq.pot
+	@cd $(BUILDDIR) && $(MAKE) top="$(top)" -f $(top)/Makefile dnsmasq.pot
 	for f in `cd $(PO); echo *.po`; do \
 		echo -n msgmerge $(PO)/$$f && $(MSGMERGE) --no-wrap -U $(PO)/$$f $(BUILDDIR)/dnsmasq.pot; \
 	done
@@ -139,17 +143,19 @@ bloatcheck : $(BUILDDIR)/dnsmasq_baseline mostly_clean all
 
 # rules below are targets in recusive makes with cwd=$(BUILDDIR)
 
-.configured: $(hdrs)
+$(copts_conf): $(hdrs)
-	@rm -f *.o
+	@rm -f *.o .copts_*
 	@touch $@
 
 $(objs:.o=.c) $(hdrs):
 	ln -s $(top)/$(SRC)/$@ .
 
+$(objs): $(copts_conf) $(hdrs)
+
 .c.o:
 	$(CC) $(CFLAGS) $(COPTS) $(i18n) $(build_cflags) $(RPM_OPT_FLAGS) -c $<	
 
-dnsmasq : .configured $(hdrs) $(objs)
+dnsmasq : $(objs)
 	$(CC) $(LDFLAGS) -o $@ $(objs) $(build_libs) $(LIBS) 
 
 dnsmasq.pot : $(objs:.o=.c) $(hdrs)

bld/Android.mk

@@ -9,7 +9,8 @@ LOCAL_SRC_FILES :=  bpf.c cache.c dbus.c dhcp.c dnsmasq.c \
 		    rfc2131.c tftp.c util.c conntrack.c \
 		    dhcp6.c rfc3315.c dhcp-common.c outpacket.c \
 		    radv.c slaac.c auth.c ipset.c domain.c \
-	            dnssec.c dnssec-openssl.c blockdata.c tables.c
+	            dnssec.c dnssec-openssl.c blockdata.c tables.c \
+		    loop.c inotify.c poll.c
 
 LOCAL_MODULE := dnsmasq
 

bld/get-version

@@ -11,8 +11,9 @@
 # If there is more than one v[0-9].* tag, sort them and use the
 # first. This favours, eg v2.63 over 2.63rc6.
 
-if which git >/dev/null 2>&1 && [ -d $1/.git ]; then
+if which git >/dev/null 2>&1 && \
-     cd $1; git describe | sed 's/^v//'
+    ([ -d $1/.git ] || grep '^gitdir:' $1/.git >/dev/null 2>&1); then 
+    cd $1; git describe | sed 's/^v//'
 elif grep '\$Format:%d\$' $1/VERSION >/dev/null 2>&1; then
 # unsubstituted VERSION, but no git available.
     echo UNKNOWN
@@ -20,7 +21,7 @@ else
      vers=`cat $1/VERSION | sed 's/[(), ]/,/ g' | tr ',' '\n' | grep ^v[0-9]`
 
      if [ $? -eq 0 ]; then
-         echo "${vers}" | sort | head -n 1 | sed 's/^v//'
+         echo "${vers}" | sort -r | head -n 1 | sed 's/^v//'
      else
          cat $1/VERSION
      fi

bld/pkg-wrapper

@@ -11,9 +11,14 @@ in=`cat`
 
 if grep "^\#[[:space:]]*define[[:space:]]*$search" config.h >/dev/null 2>&1 || \
     echo $in | grep $search >/dev/null 2>&1; then
-
+# Nasty, nasty, in --copy, arg 2 is another config to search for, use with NO_GMP
     if [ $op = "--copy" ]; then
-	pkg="$*"
+	if grep "^\#[[:space:]]*define[[:space:]]*$pkg" config.h >/dev/null 2>&1 || \
+            echo $in | grep $pkg >/dev/null 2>&1; then
+	    pkg=""
+	else 
+	    pkg="$*"
+	fi
     elif grep "^\#[[:space:]]*define[[:space:]]*${search}_STATIC" config.h >/dev/null 2>&1 || \
 	      echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
 	pkg=`$pkg  --static $op $*`

contrib/reverse-dns/README

@@ -0,0 +1,18 @@
+The script reads stdin and replaces all IP addresses with names before
+outputting it again. IPs from private networks are reverse looked  up
+via dns. Other IP adresses are searched for in the dnsmasq query log.
+This gives names (CNAMEs if I understand DNS correctly) that are closer
+to the name the client originally asked for then the names obtained by
+reverse lookup. Just run
+
+netstat -n -4 | ./reverse_replace.sh 
+
+to see what it does. It needs 
+
+log-queries
+log-facility=/var/log/dnsmasq.log
+
+in the dnsmasq configuration.
+
+The script runs on debian (with ash installed) and on busybox.
+

contrib/reverse-dns/reverse_replace.sh

@@ -0,0 +1,125 @@
+#!/bin/ash
+# $Id: reverse_replace.sh 18 2015-03-01 16:12:35Z jo $
+#
+# Usage e.g.: netstat -n -4 | reverse_replace.sh 
+# Parses stdin for IP4 addresses and replaces them 
+# with names retrieved by parsing the dnsmasq log.
+# This currently only gives CNAMEs. But these 
+# usually tell ou more than the mones from reverse 
+# lookups. 
+#
+# This has been tested on debian and asuswrt. Plese
+# report successful tests on other platforms.
+#
+# Author: Joachim Zobel <jz-2014@heute-morgen.de>
+# License: Consider this MIT style licensed. You can 
+#   do as you ike, but you must not remove my name.
+#
+
+LOG=/var/log/dnsmasq.log
+MAX_LINES=15000
+
+# sed regex do match IPs
+IP_regex='[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'
+# private IP ranges
+IP_private='\(^127\.\)\|\(^192\.168\.\)\|\(^10\.\)\|\(^172\.1[6-9]\.\)\|\(^172\.2[0-9]\.\)\|\(^172\.3[0-1]\.\)'
+
+#######################################################################
+# Find Commands
+  
+HOST=nslookup
+if type host > /dev/null 2>&1; then
+  # echo "No need for nslookup, host is there"
+  HOST=host
+fi
+
+#######################################################################
+# Functions
+
+# Use shell variables for an (IP) lookup table
+create_lookup_table()
+{
+  # Parse log into lookup table
+  local CMDS="$( tail -"$MAX_LINES" "$LOG" | \
+    grep " is $IP_regex" | \
+    sed "s#.* \([^ ]*\) is \($IP_regex\).*#set_val \2 \1;#" )"
+
+  local IFS='
+'
+  for CMD in $CMDS
+  do
+    eval $CMD
+  done
+}
+
+set_val()
+{
+  local _IP=$(echo $1 | tr . _)
+  local KEY="__IP__$_IP"
+  eval "$KEY"=$2
+}
+
+get_val()
+{
+  local _IP=$(echo $1 | tr . _)
+  local KEY="__IP__$_IP"
+  eval echo -n '${'"$KEY"'}'
+}
+
+dns_lookup()
+{
+  local IP=$1
+
+  local RTN="$($HOST $IP | \
+        sed 's#\s\+#\n#g' | \
+        grep -v '^$' | \
+        tail -1 | tr -d '\n' | \
+        sed 's#\.$##')"
+  if echo $RTN | grep -q NXDOMAIN; then
+    echo -n $IP
+  else
+    echo -n "$RTN"
+  fi     
+}
+
+reverse_dns()
+{
+  local IP=$1
+
+  # Skip if it is not an IP
+  if ! echo $IP | grep -q "^$IP_regex$"; then
+    echo -n $IP
+    return 
+  fi
+    
+  # Do a dns lookup, if it is a local IP
+  if echo $IP | grep -q $IP_private; then
+    dns_lookup $IP
+    return
+  fi
+    
+  local NAME="$(get_val $IP)"
+  
+  if [ -z "$NAME" ]; then
+    echo -n $IP
+  else
+    echo -n $NAME
+  fi
+}
+
+#######################################################################
+# Main
+create_lookup_table
+
+while read LINE; do
+  for IP in $(echo "$LINE" | \
+              sed "s#\b\($IP_regex\)\b#\n\1\n#g" | \
+              grep $IP_regex) 
+  do
+    NAME=`reverse_dns $IP `
+    # echo "$NAME $IP"
+    LINE=`echo "$LINE" | sed "s#$IP#$NAME#" ` 
+  done
+  echo $LINE
+done
+

contrib/systemd/dnsmasq.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=A lightweight DHCP and caching DNS server
+Description=dnsmasq - A lightweight DHCP and caching DNS server
 
 [Service]
 Type=dbus

contrib/wrt/dhcp_release.c

@@ -277,6 +277,11 @@ int main(int argc, char **argv)
       exit(1);
     }
   
+  if (inet_addr(argv[2]) == INADDR_NONE)
+    {
+      perror("invalid ip address");
+      exit(1);
+    }
   
   lease.s_addr = inet_addr(argv[2]);
   server = find_interface(lease, nl, if_nametoindex(argv[1]));

dbus/DBus-interface

@@ -40,6 +40,14 @@ ClearCache
 Returns nothing. Clears the domain name cache and re-reads
 /etc/hosts. The same as sending dnsmasq a HUP signal.
 
+SetFilterWin2KOption
+--------------------
+Takes boolean, sets or resets the --filterwin2k option.
+
+SetBogusPrivOption
+------------------
+Takes boolean, sets or resets the --bogus-priv option.
+
 SetServers
 ----------
 Returns nothing. Takes a set of arguments representing the new
@@ -152,6 +160,89 @@ for SetServersEx is represented as
   "/eng.mycorp.com/lab.mycorp.com/1003:1234:abcd::1%eth0"
 ]
 
+GetLoopServers
+--------------
+
+(Only available if dnsmasq compiled with HAVE_LOOP)
+
+Return an array of strings, each string is the IP address of an upstream
+server which has been found to loop queries back to this dnsmasq instance, and 
+it therefore not being used.
+
+AddDhcpLease
+------------
+
+Returns nothing. Adds or updates a DHCP or DHCPv6 lease to the internal lease
+database, as if a client requested and obtained a lease.
+
+If a lease for the IPv4 or IPv6 address already exist, it is overwritten.
+
+Note that this function will trigger the DhcpLeaseAdded or DhcpLeaseUpdated
+D-Bus signal and will run the configured DHCP lease script accordingly.
+
+This function takes many arguments which are the lease parameters:
+- A string with the textual representation of the IPv4 or IPv6 address of the
+  client.
+
+  Examples:
+  "192.168.1.115"
+  "1003:1234:abcd::1%eth0"
+  "2001:db8:abcd::1"
+
+- A string representing the hardware address of the client, using the same
+  format as the one used in the lease database.
+
+  Examples:
+
+  "00:23:45:67:89:ab"
+  "06-00:20:e0:3b:13:af" (token ring)
+
+- The hostname of the client, as an array of bytes (so there is no problem
+  with non-ASCII character encoding). May be empty.
+
+  Example (for "hostname.or.fqdn"):
+  [104, 111, 115, 116, 110, 97, 109, 101, 46, 111, 114, 46, 102, 113, 100, 110]
+
+- The client identifier (IPv4) or DUID (IPv6) as an array of bytes. May be
+  empty.
+
+  Examples:
+
+  DHCPv6 DUID:
+  [0, 3, 0, 1, 0, 35, 69, 103, 137, 171]
+  DHCPv4 client identifier:
+  [255, 12, 34, 56, 78, 0, 1, 0, 1, 29, 9, 99, 190, 35, 69, 103, 137, 171]
+
+- The duration of the lease, in seconds. If the lease is updated, then
+  the duration replaces the previous duration.
+
+  Example:
+
+  7200
+
+- The IAID (Identity association identifier) of the DHCPv6 lease, as a network
+  byte-order unsigned integer. For DHCPv4 leases, this must be set to 0.
+
+  Example (for IPv6):
+
+  203569230
+
+- A boolean which, if true, indicates that the DHCPv6 lease is for a temporary
+  address (IA_TA). If false, the DHCPv6 lease is for a non-temporary address
+  (IA_NA). For DHCPv4 leases, this must be set to false.
+
+RemoveDhcpLease
+---------------
+
+Returns nothing. Removes a DHCP or DHCPv6 lease to the internal lease
+database, as if a client sent a release message to abandon a lease.
+
+This function takes only one parameter: the text representation of the
+IPv4 or IPv6 address of the lease to remove.
+
+Note that this function will trigger the DhcpLeaseRemoved signal and the
+configured DHCP lease script will be run with the "del" action.
+
 
 
 2. SIGNALS

debian/changelog

@@ -1,8 +1,52 @@
+dnsmasq (2.74-1) unstable; urgency=low
+
+   * New upstream. 
+	
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 7 Jul 2015 21:54:11 +0000
+
+dnsmasq (2.73-2) unstable; urgency=low
+
+   * Fix behaviour of empty --conf-file (closes: #790341)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 7 Jul 2015 21:46:42 +0000
+
+dnsmasq (2.73-1) unstable; urgency=low
+
+   * New upstream. (closes: #786996)
+   * Tweak field width in cache dump to avoid truncating IPv6
+     addresses. (closes: #771557)
+   * Add newline at the end of example config file. (LP: #1416895)
+   * Make Debian package build reproducible. (closes: #777323)
+   * Add Requires=network.target to systemd unit.
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 4 Jun 2015 22:31:42 +0000
+
+dnsmasq (2.72-3) unstable; urgency=medium
+
+   * debian/systemd.service: switch from Type=dbus to Type=forking.
+     dnsmasq does not depend on dbus, but Type=dbus systemd services cannot
+     work without it. (Closes: #769486, #776530)
+     - debian/init: when called with systemd-exec argument, let dnsmasq
+       go into the background, so Type=forking can detect when it is ready
+   * Remove line containing only whitespace in debian/contol.
+     (closes: #777571)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Wed, 11 Feb 2015 21:56:12 +0000
+
+dnsmasq (2.72-2) unstable; urgency=low
+
+   * Fix build in Debian-kFreeBSD. (closes: #763693)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 02 Oct 2014 22:34:12 +0000
+
 dnsmasq (2.72-1) unstable; urgency=low
 
    * New upstream.
+   * If dns-root-data package is installed, use it to set the DNSSEC
+     trust anchor(s). Recommend dns-root-data. (closes: #760460)
+   * Handle AD bit correctly in replies from cache. (closes: #761654)
 
- -- Simon Kelley <simon@thekelleys.org.uk>  Fri, 20 May 2014 21:01:11 +0000
+ -- Simon Kelley <simon@thekelleys.org.uk>  Tue, 20 May 2014 21:01:11 +0000
 
 dnsmasq (2.71-1) unstable; urgency=low
 

debian/control

@@ -3,9 +3,9 @@ Section: net
 Priority: optional
 Build-depends: gettext, libnetfilter-conntrack-dev [linux-any],
                libidn11-dev, libdbus-1-dev (>=0.61), libgmp-dev, 
-               nettle-dev (>=2.4-3)
+               nettle-dev (>=2.4-3), libbsd-dev [!linux-any]
 Maintainer: Simon Kelley <simon@thekelleys.org.uk>
-Standards-Version: 3.9.3
+Standards-Version: 3.9.5
 
 Package: dnsmasq
 Architecture: all
@@ -28,6 +28,7 @@ Architecture: any
 Depends: adduser, ${shlibs:Depends}
 Breaks: dnsmasq (<< 2.63-1~)
 Replaces: dnsmasq (<< 2.63-1~)
+Recommends: dns-root-data
 Description: Small caching DNS proxy and DHCP/TFTP server
  This package contains the dnsmasq executable and documentation, but
  not the infrastructure required to run it as a system daemon. For
@@ -41,5 +42,3 @@ Description: Utilities for manipulating DHCP leases
  Small utilities to query a DHCP server's lease database and
  remove leases from it. These programs are distributed with dnsmasq
  and may not work correctly with other DHCP servers.
-
- 

debian/copyright

@@ -1,4 +1,4 @@
-dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
 It was downloaded from: http://www.thekelleys.org.uk/dnsmasq/
 

debian/init

@@ -104,6 +104,16 @@ fi
 
 DNSMASQ_OPTS="$DNSMASQ_OPTS --local-service"
 
+# If the dns-root-data package is installed, then the trust anchors will be 
+# available in $ROOT_DS, in BIND zone-file format. Reformat as dnsmasq
+# --trust-anchor options.
+
+ROOT_DS="/usr/share/dns/root.ds"
+
+if [ -f $ROOT_DS ]; then
+   DNSMASQ_OPTS="$DNSMASQ_OPTS `sed -e s/". IN DS "/--trust-anchor=.,/ -e s/" "/,/g $ROOT_DS | tr '\n' ' '`" 
+fi
+
 start()
 {
         # Return
@@ -283,9 +293,7 @@ case "$1" in
            mkdir /var/run/dnsmasq || return 2
            chown dnsmasq:nogroup /var/run/dnsmasq || return 2
         fi
-# Enable DBus by default because we use DBus activation with systemd.
+	exec $DAEMON -x /var/run/dnsmasq/$NAME.pid \
-	exec $DAEMON --keep-in-foreground --enable-dbus \
-	    -x /var/run/dnsmasq/$NAME.pid \
 	    ${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
 	    ${MAILTARGET:+ -t $MAILTARGET} \
 	    ${DNSMASQ_USER:+ -u $DNSMASQ_USER} \

debian/rules

@@ -23,7 +23,8 @@ DEB_COPTS = $(COPTS)
 
 TARGET = install-i18n
 
-DEB_BUILD_ARCH_OS := $(shell dpkg-architecture -qDEB_BUILD_ARCH_OS)
+DEB_HOST_ARCH_OS := $(shell dpkg-architecture -qDEB_HOST_ARCH_OS)
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
 
 # Force package version based on git tags.
 ifneq (,$(filter gitversion,$(DEB_BUILD_OPTIONS)))
@@ -35,7 +36,7 @@ ifeq (,$(filter nodbus,$(DEB_BUILD_OPTIONS)))
 endif
 
 ifeq (,$(filter noconntrack,$(DEB_BUILD_OPTIONS)))
-ifeq ($(DEB_BUILD_ARCH_OS),linux)
+ifeq ($(DEB_HOST_ARCH_OS),linux)
      DEB_COPTS += -DHAVE_CONNTRACK
 endif
 endif
@@ -83,6 +84,11 @@ ifeq (,$(filter nodnssec,$(DEB_BUILD_OPTIONS)))
      DEB_COPTS += -DHAVE_DNSSEC
 endif
 
+ifneq ($(DEB_HOST_ARCH_OS),linux)
+     # For strlcpy in FreeBSD
+     LDFLAGS += -lbsd
+endif
+
 clean:
 	$(checkdir)
 	rm -rf debian/daemon debian/base debian/utils debian/*~ debian/files debian/substvars debian/utils-substvars
@@ -113,8 +119,9 @@ binary-indep:	checkroot
 	install -m 644 debian/systemd.service debian/daemon/lib/systemd/system/dnsmasq.service
 	install -m 644 debian/insserv debian/daemon/etc/insserv.conf.d/dnsmasq
 	ln -s $(package) debian/daemon/usr/share/doc/dnsmasq
-	cd debian/daemon && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | xargs -r0 md5sum > DEBIAN/md5sums	
+	cd debian/daemon && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | LC_ALL=C sort -z | xargs -r0 md5sum > DEBIAN/md5sums	
 	dpkg-gencontrol $(PACKAGE_VERSION) -T -pdnsmasq -Pdebian/daemon
+	find debian/daemon -depth -newermt '$(BUILD_DATE)' -print0 | xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	chown -R root.root debian/daemon
 	chmod -R g-ws debian/daemon
 	dpkg --build debian/daemon ..
@@ -132,44 +139,47 @@ binary-arch:	checkroot
 	        -d debian/base/var/lib/misc
 	make $(TARGET) PREFIX=/usr DESTDIR=`pwd`/debian/base CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(DEB_COPTS)" CC=gcc
 ifeq (,$(findstring nodocs,$(DEB_BUILD_OPTIONS)))
-	install -m 644 doc.html debian/base/usr/share/doc/$(package)/.
+# Need to remove paypal links in Debian Package for policy reasons.
+	sed -e /\<H2\>Donations/Q -e /icon.png/d doc.html -e /favicon.ico/d >debian/base/usr/share/doc/$(package)/doc.html
+	echo "</BODY>" >>debian/base/usr/share/doc/$(package)/doc.html 
 	install -m 644 setup.html debian/base/usr/share/doc/$(package)/.
 	install -m 644 dnsmasq.conf.example debian/base/usr/share/doc/$(package)/examples/.
 	install -m 644 trust-anchors.conf debian/base/usr/share/$(package)/.
 	install -m 644 FAQ debian/base/usr/share/doc/$(package)/.
-	gzip -9 debian/base/usr/share/doc/$(package)/FAQ
+	gzip -9n debian/base/usr/share/doc/$(package)/FAQ
 	install -m 644 CHANGELOG debian/base/usr/share/doc/$(package)/changelog
-	gzip -9 debian/base/usr/share/doc/$(package)/changelog
+	gzip -9n debian/base/usr/share/doc/$(package)/changelog
 	install -m 644 CHANGELOG.archive debian/base/usr/share/doc/$(package)/changelog.archive
-	gzip -9 debian/base/usr/share/doc/$(package)/changelog.archive
+	gzip -9n debian/base/usr/share/doc/$(package)/changelog.archive
 	install -m 644 dbus/DBus-interface debian/base/usr/share/doc/$(package)/.
-	gzip -9 debian/base/usr/share/doc/$(package)/DBus-interface	
+	gzip -9n debian/base/usr/share/doc/$(package)/DBus-interface	
 endif
 	install -m 644 debian/dnsmasq-base.conffiles debian/base/DEBIAN/conffiles
 	install -m 755 debian/dnsmasq-base.postinst debian/base/DEBIAN/postinst
 	install -m 755 debian/dnsmasq-base.postrm  debian/base/DEBIAN/postrm
 	install -m 644 debian/changelog debian/base/usr/share/doc/$(package)/changelog.Debian
-	gzip -9 debian/base/usr/share/doc/$(package)/changelog.Debian
+	gzip -9n debian/base/usr/share/doc/$(package)/changelog.Debian
 	install -m 644 debian/readme debian/base/usr/share/doc/$(package)/README.Debian
 	install -m 644 debian/copyright debian/base/usr/share/doc/$(package)/copyright
 	install -m 644 debian/dbus.conf debian/base/etc/dbus-1/system.d/dnsmasq.conf
-	gzip -9 debian/base/usr/share/man/man8/dnsmasq.8
+	gzip -9n debian/base/usr/share/man/man8/dnsmasq.8
 	for f in debian/base/usr/share/man/*; do \
 		if [ -f $$f/man8/dnsmasq.8 ]; then \
-                       gzip -9 $$f/man8/dnsmasq.8 ; \
+                       gzip -9n $$f/man8/dnsmasq.8 ; \
                 fi \
 	done
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 	strip -R .note -R .comment debian/base/usr/sbin/dnsmasq
 endif
-	cd debian/base && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | xargs -r0 md5sum > DEBIAN/md5sums
+	cd debian/base && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | LC_ALL=C sort -z | xargs -r0 md5sum > DEBIAN/md5sums
 	dpkg-shlibdeps --warnings=1 debian/base/usr/sbin/dnsmasq
 	dpkg-gencontrol $(PACKAGE_VERSION) -pdnsmasq-base -Pdebian/base
+	find debian/base -depth -newermt '$(BUILD_DATE)' -print0 | xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	chown -R root.root debian/base
 	chmod -R g-ws debian/base 
 	dpkg --build debian/base ..
 
-ifeq ($(DEB_BUILD_ARCH_OS),linux)
+ifeq ($(DEB_HOST_ARCH_OS),linux)
 	rm -rf debian/utils
 	install -m 755 -d debian/utils/DEBIAN \
                        -d debian/utils/usr/share/man/man1 \
@@ -178,20 +188,21 @@ ifeq ($(DEB_BUILD_ARCH_OS),linux)
 	make -C contrib/wrt PREFIX=/usr DESTDIR=`pwd`/debian/utils CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(DEB_COPTS)" CC=gcc
 	install -m 755 contrib/wrt/dhcp_release debian/utils/usr/bin/dhcp_release
 	install -m 644 contrib/wrt/dhcp_release.1 debian/utils/usr/share/man/man1/dhcp_release.1
-	gzip -9 debian/utils/usr/share/man/man1/dhcp_release.1
+	gzip -9n debian/utils/usr/share/man/man1/dhcp_release.1
 	install -m 755 contrib/wrt/dhcp_lease_time debian/utils/usr/bin/dhcp_lease_time
 	install -m 644 contrib/wrt/dhcp_lease_time.1 debian/utils/usr/share/man/man1/dhcp_lease_time.1
 	install -m 644 debian/copyright debian/utils/usr/share/doc/dnsmasq-utils/copyright
 	install -m 644 debian/changelog debian/utils/usr/share/doc/dnsmasq-utils/changelog.Debian
-	gzip -9 debian/utils/usr/share/doc/dnsmasq-utils/changelog.Debian
+	gzip -9n debian/utils/usr/share/doc/dnsmasq-utils/changelog.Debian
-	gzip -9 debian/utils/usr/share/man/man1/dhcp_lease_time.1
+	gzip -9n debian/utils/usr/share/man/man1/dhcp_lease_time.1
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 	strip -R .note -R .comment debian/utils/usr/bin/dhcp_release
 	strip -R .note -R .comment debian/utils/usr/bin/dhcp_lease_time
 endif	
-	cd debian/utils && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | xargs -r0 md5sum > DEBIAN/md5sums
+	cd debian/utils && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | LC_ALL=C sort -z | xargs -r0 md5sum > DEBIAN/md5sums
 	dpkg-shlibdeps -Tdebian/utils-substvars debian/utils/usr/bin/dhcp_release debian/utils/usr/bin/dhcp_lease_time
 	dpkg-gencontrol $(PACKAGE_VERSION) -Tdebian/utils-substvars -pdnsmasq-utils -Pdebian/utils
+	find debian/utils -depth -newermt '$(BUILD_DATE)' -print0 | xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	chown -R root.root debian/utils
 	chmod -R g-ws debian/utils 
 	dpkg --build debian/utils ..

debian/systemd.service

@@ -1,9 +1,10 @@
 [Unit]
-Description=A lightweight DHCP and caching DNS server
+Description=dnsmasq - A lightweight DHCP and caching DNS server
+Requires=network.target
 
 [Service]
-Type=dbus
+Type=forking
-BusName=uk.org.thekelleys.dnsmasq
+PIDFile=/var/run/dnsmasq/dnsmasq.pid
 
 # Test the config file and refuse starting if it is not valid.
 ExecStartPre=/usr/sbin/dnsmasq --test
@@ -11,11 +12,6 @@ ExecStartPre=/usr/sbin/dnsmasq --test
 # We run dnsmasq via the /etc/init.d/dnsmasq script which acts as a
 # wrapper picking up extra configuration files and then execs dnsmasq
 # itself, when called with the "systemd-exec" function.
-#
-# It also adds the command-line flags
-#    --keep-in-foreground --enable-dbus 
-# to enable DBus by default because we use DBus activation.
-#
 ExecStart=/etc/init.d/dnsmasq systemd-exec
 
 # The systemd-*-resolvconf functions configure (and deconfigure)

dnsmasq.conf.example

@@ -251,6 +251,13 @@
 # the IP address 192.168.0.60
 #dhcp-host=id:01:02:02:04,192.168.0.60
 
+# Always give the Infiniband interface with hardware address
+# 80:00:00:48:fe:80:00:00:00:00:00:00:f4:52:14:03:00:28:05:81 the
+# ip address 192.168.0.61. The client id is derived from the prefix
+# ff:00:00:00:00:00:02:00:00:02:c9:00 and the last 8 pairs of
+# hex digits of the hardware address.
+#dhcp-host=id:ff:00:00:00:00:00:02:00:00:02:c9:00:f4:52:14:03:00:28:05:81,192.168.0.61
+
 # Always give the host with client identifier "marjorie"
 # the IP address 192.168.0.60
 #dhcp-host=id:marjorie,192.168.0.60
@@ -345,6 +352,14 @@
 # Ask client to poll for option changes every six hours. (RFC4242)
 #dhcp-option=option6:information-refresh-time,6h
 
+# Set option 58 client renewal time (T1). Defaults to half of the
+# lease time if not specified. (RFC2132)
+#dhcp-option=option:T1:1m
+
+# Set option 59 rebinding time (T2). Defaults to 7/8 of the
+# lease time if not specified. (RFC2132)
+#dhcp-option=option:T2:2m
+
 # Set the NTP time server address to be the same machine as
 # is running dnsmasq
 #dhcp-option=42,0.0.0.0
@@ -486,6 +501,9 @@
 # Set the root directory for files available via FTP.
 #tftp-root=/var/ftpd
 
+# Do not abort if the tftp-root is unavailable
+#tftp-no-fail
+
 # Make the TFTP server more secure: with this set, only files owned by
 # the user dnsmasq is running as will be send over the net.
 #tftp-secure
@@ -640,3 +658,9 @@
 # Include another lot of configuration options.
 #conf-file=/etc/dnsmasq.more.conf
 #conf-dir=/etc/dnsmasq.d
+
+# Include all the files in a directory except those ending in .bak
+#conf-dir=/etc/dnsmasq.d,.bak
+
+# Include all files in a directory which end in .conf
+#conf-dir=/etc/dnsmasq.d/,*.conf

doc.html

@@ -1,8 +1,7 @@
 <HTML>
 <HEAD>
 <TITLE> Dnsmasq - network services for small networks.</TITLE>
-<link rel="icon"
+<link rel="icon" href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
-      href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
 </HEAD>
 <BODY BGCOLOR="WHITE"> 
 <table width="100%" border="0" cellpadding="0" cellspacing="0">
@@ -75,7 +74,9 @@ for details.
 There is a dnsmasq mailing list at <A
 HREF="http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss">
 http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss</A> which should be the
-first location for queries, bugreports, suggestions etc.
+first location for queries, bugreports, suggestions etc. The list is mirrored, with a
+search facility, at <A HREF="https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/">
+https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/</A>.
 You can contact me at <A
 HREF="mailto:simon@thekelleys.org.uk">simon@thekelleys.org.uk</A>.
 

man/dnsmasq.8

@@ -50,6 +50,10 @@ Additional hosts file. Read the specified file as well as /etc/hosts. If -h is g
 only the specified file. This option may be repeated for more than one
 additional hosts file. If a directory is given, then read all the files contained in that directory. 
 .TP
+.B --hostsdir=<path>
+Read all the hosts files contained in the directory. New or changed files
+are read automatically. See --dhcp-hostsdir for details.
+.TP
 .B \-E, --expand-hosts
 Add the domain to simple names (without a period) in /etc/hosts
 in the same way as for DHCP-derived names. Note that this does not
@@ -81,6 +85,12 @@ the upstream DNS servers.
 .B --max-cache-ttl=<time>
 Set a maximum TTL value for entries in the cache.
 .TP
+.B --min-cache-ttl=<time>
+Extend short TTL values to the time given when caching them. Note that
+artificially extending TTL values is in general a bad idea, do not do it 
+unless you have a good reason, and understand what you are doing. 
+Dnsmasq limits the value of this option to one hour, unless recompiled.
+.TP
 .B --auth-ttl=<time>
 Set the TTL value returned in answers from the authoritative server.
 .TP
@@ -98,7 +108,10 @@ only, to stop dnsmasq daemonising in production, use
 .B -k.
 .TP
 .B \-q, --log-queries
-Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1.
+Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1. If the argument "extra" is supplied, ie
+.B --log-queries=extra
+then the log has extra information at the start of each line.
+This consists of a serial number which ties together the log lines associated with an individual query, and the IP address of the requestor.
 .TP
 .B \-8, --log-facility=<facility>
 Set the facility to which dnsmasq will send syslog entries, this
@@ -293,6 +306,12 @@ an advertising web page in response to queries for unregistered names,
 instead of the correct NXDOMAIN response. This option tells dnsmasq to
 fake the correct response when it sees this behaviour. As at Sept 2003
 the IP address being returned by Verisign is 64.94.110.11
+.TP 
+.B \-B, --ignore-address=<ipaddr>
+Ignore replies to A-record queries which include the specified address. 
+No error is generated, dnsmasq simply continues to listen for another reply. 
+This is useful to defeat blocking strategies which rely on quickly supplying a
+forged answer to a DNS request for certain domain, before the correct answer can arrive.
 .TP
 .B \-f, --filterwin2k
 Later versions of windows make periodic DNS requests which don't get sensible answers from
@@ -334,6 +353,16 @@ it will send queries to just one server. Setting this flag forces
 dnsmasq to send all queries to all available servers. The reply from
 the server which answers first will be returned to the original requester.
 .TP
+.B --dns-loop-detect
+Enable code to detect DNS forwarding loops; ie the situation where a query sent to one 
+of the upstream server eventually returns as a new query to the dnsmasq instance. The
+process works by generating TXT queries of the form <hex>.test and sending them to
+each upstream server. The hex is a UID which encodes the instance of dnsmasq sending the query
+and the upstream server to which it was sent. If the query returns to the server which sent it, then
+the upstream server through which it was sent is disabled and this event is logged. Each time the
+set of upstream servers changes, the test is re-run on all of them, including ones which
+were previously disabled.
+.TP
 .B --stop-dns-rebind
 Reject (and log) addresses from upstream nameservers which are in the
 private IP ranges. This blocks an attack where a browser behind a
@@ -431,7 +460,7 @@ but provides some syntactic sugar to make specifying address-to-name queries eas
 is exactly equivalent to 
 .B --server=/3.2.1.in-addr.arpa/192.168.0.1
 .TP
-.B \-A, --address=/<domain>/[domain/]<ipaddr>
+.B \-A, --address=/<domain>/[domain/][<ipaddr>]
 Specify an IP address to return for any host in the given domains.
 Queries in the domains are never forwarded and always replied to
 with the specified IP address which may be IPv4 or IPv6. To give
@@ -443,7 +472,10 @@ domain specification works in the same was as for --server, with the
 additional facility that /#/ matches any domain. Thus
 --address=/#/1.2.3.4 will always return 1.2.3.4 for any query not
 answered from /etc/hosts or DHCP and not sent to an upstream
-nameserver by a more specific --server directive.
+nameserver by a more specific --server directive. As for --server,
+one or more domains with no address returns a no-such-domain answer, so
+--address=/example.com/ is equivalent to --server=/example.com/ and returns 
+NXDOMAIN for example.com and all its subdomains.
 .TP
 .B --ipset=/<domain>/[domain/]<ipset>[,<ipset>]
 Places the resolved IP addresses of queries for the specified domains
@@ -487,7 +519,7 @@ zone files: the port, weight and priority numbers are in a different
 order. More than one SRV record for a given service/domain is allowed,
 all that match are returned.
 .TP
-.B --host-record=<name>[,<name>....][<IPv4-address>],[<IPv6-address>]
+.B --host-record=<name>[,<name>....],[<IPv4-address>],[<IPv6-address>]
 Add A, AAAA and PTR records to the DNS. This adds one or more names to
 the DNS with associated IPv4 (A) and IPv6 (AAAA) records. A name may
 appear in more than one 
@@ -622,7 +654,7 @@ Provide DS records to act a trust anchors for DNSSEC
 validation. Typically these will be the DS record(s) for Zone Signing
 key(s) of the root zone,
 but trust anchors for limited domains are also possible. The current
-root-zone trust anchors may be donwloaded from https://data.iana.org/root-anchors/root-anchors.xml 
+root-zone trust anchors may be downloaded from https://data.iana.org/root-anchors/root-anchors.xml 
 .TP
 .B --dnssec-check-unsigned
 As a default, dnsmasq does not check that unsigned DNS replies are
@@ -645,6 +677,13 @@ that dnsmasq should be started with this flag when the platform determines that
 reliable time is established, a SIGHUP should be sent to dnsmasq, which enables time checking, and purges the cache of DNS records
 which have not been throughly checked.
 .TP
+.B --dnssec-timestamp=<path>
+Enables an alternative way of checking the validity of the system time for DNSSEC (see --dnssec-no-timecheck). In this case, the 
+system time is considered to be valid once it becomes later than the timestamp on the specified file. The file is created and 
+its timestamp set automatically by dnsmasq. The file must be stored on a persistent filesystem, so that it and its mtime are carried 
+over system restarts. The timestamp file is created after dnsmasq has dropped root, so it must be in a location writable by the 
+unprivileged user that dnsmasq runs as.
+.TP
 .B --proxy-dnssec
 Copy the DNSSEC Authenticated Data bit from upstream servers to downstream clients and cache it.  This is an 
 alternative to having dnsmasq validate DNSSEC, but it depends on the security of the network between 
@@ -794,7 +833,7 @@ and
 for details.)
 
 For IPv6, the mode may be some combination of
-.B ra-only, slaac, ra-names, ra-stateless, ra-advrouter.
+.B ra-only, slaac, ra-names, ra-stateless, ra-advrouter, off-link.
 
 .B ra-only
 tells dnsmasq to offer Router Advertisement only on this subnet,
@@ -834,6 +873,9 @@ enables a mode where router address(es) rather than prefix(es) are included in t
 This is described in RFC-3775 section 7.2 and is used in mobile IPv6. In this mode the interval option
 is also included, as described in RFC-3775 section 7.3.
 
+.B off-link
+tells dnsmasq to advertise the prefix without the on-link (aka L) bit set.
+
 .TP
 .B \-G, --dhcp-host=[<hwaddr>][,id:<client_id>|*][,set:<tag>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
 Specify per host parameters for the DHCP server. This allows a machine
@@ -952,6 +994,18 @@ is given, then read all the files contained in that directory. The advantage of
 using this option is the same as for --dhcp-hostsfile: the
 dhcp-optsfile will be re-read when dnsmasq receives SIGHUP. Note that
 it is possible to encode the information in a
+.TP
+.B --dhcp-hostsdir=<path>
+This is equivalent to dhcp-hostsfile, except for the following. The path MUST be a
+directory, and not an individual file. Changed or new files within
+the directory are read automatically, without the need to send SIGHUP.
+If a file is deleted for changed after it has been read by dnsmasq, then the
+host record it contained will remain until dnsmasq recieves a SIGHUP, or 
+is restarted; ie host records are only added dynamically.
+.TP
+.B --dhcp-optsdir=<path>
+This is equivalent to dhcp-optsfile, with the differences noted for --dhcp-hostsdir.
+.TP
 .B --dhcp-boot
 flag as DHCP options, using the options names bootfile-name,
 server-ip-address and tftp-server. This allows these to be included
@@ -1337,7 +1391,7 @@ enables dynamic allocation. With tags, only when the tags are all
 set. It may be repeated with different tag sets. 
 .TP
 .B \-5, --no-ping
-(IPv4 only) By default, the DHCP server will attempt to ensure that an address in
+(IPv4 only) By default, the DHCP server will attempt to ensure that an address is
 not in use before allocating it to a host. It does this by sending an
 ICMP echo request (aka "ping") to the address in question. If it gets
 a reply, then the address must already be in use, and another is
@@ -1546,10 +1600,13 @@ option also forces the leasechange script to be called on changes
 to the client-id and lease length and expiry time.
 .TP
 .B --bridge-interface=<interface>,<alias>[,<alias>]
-Treat DHCP request packets arriving at any of the <alias> interfaces
+Treat DHCP (v4 and v6) request and IPv6 Router Solicit packets
-as if they had arrived at <interface>. This option is necessary when
+arriving at any of the <alias> interfaces as if they had arrived at
-using "old style" bridging on BSD platforms, since
+<interface>.  This option allows dnsmasq to provide DHCP and RA
-packets arrive at tap interfaces which don't have an IP address.
+service over unaddressed and unbridged Ethernet interfaces, e.g. on an
+OpenStack compute host where each such interface is a TAP interface to
+a VM, or as in "old style bridging" on BSD platforms.  A trailing '*'
+wildcard can be used in each <alias>.
 .TP
 .B \-s, --domain=<domain>[,<address range>[,local]]
 Specifies DNS domains for the DHCP server. Domains may be be given 
@@ -1659,6 +1716,9 @@ Absolute paths (starting with /) are allowed, but they must be within
 the tftp-root. If the optional interface argument is given, the
 directory is only used for TFTP requests via that interface.
 .TP
+.B --tftp-no-fail
+Do not abort startup if specified tftp root directories are inaccessible.
+.TP
 .B --tftp-unique-root
 Add the IP address of the TFTP client as a path component on the end
 of the TFTP-root (in standard dotted-quad format). Only valid if a
@@ -1714,12 +1774,16 @@ Specify a different configuration file. The conf-file option is also allowed in
 configuration files, to include multiple configuration files. A
 filename of "-" causes dnsmasq to read configuration from stdin.
 .TP
-.B \-7, --conf-dir=<directory>[,<file-extension>......]
+.B \-7, --conf-dir=<directory>[,<file-extension>......],
 Read all the files in the given directory as configuration
 files. If extension(s) are given, any files which end in those
 extensions are skipped. Any files whose names end in ~ or start with . or start and end
-with # are always skipped. This flag may be given on the command
+with # are always skipped. If the extension starts with * then only files 
-line or in a configuration file.
+which have that extension are loaded. So
+.B --conf-dir=/path/to/dir,*.conf
+loads all files with the suffix .conf in /path/to/dir. This flag may be given on the command
+line or in a configuration file. If giving it on the command line, be sure to
+escape * characters.
 .TP
 .B --servers-file=<file>
 A special case of 
@@ -1752,7 +1816,8 @@ clears its cache and then re-loads
 .I /etc/hosts
 and 
 .I /etc/ethers 
-and any file given by --dhcp-hostsfile, --dhcp-optsfile or --addn-hosts.
+and any file given by --dhcp-hostsfile, --dhcp-hostsdir, --dhcp-optsfile, 
+--dhcp-optsdir, --addn-hosts or --hostsdir.
 The dhcp lease change script is called for all
 existing DHCP leases. If 
 .B

man/es/dnsmasq.8

@@ -1062,10 +1062,14 @@ esta opci
 cuando hay cambios hechos a el client-id y tiempos de arriendo y vencimiento.
 .TP
 .B --bridge-interface=<nombre de interface>,<alias>[,<alias>]
-Tratar paquetes de pedidos DHCP que llegan a cualquiera de las interfaces <alias>
+Tratar paquetes de pedidos DHCP (v4 y v6) y de IPv6 Router Solicit que
-como si hubieran llegado a la interface <nombre de interface>. Esta opción
+llegan a cualquiera de las interfaces <alias> como si hubieran llegado
-es necesaria al usar bridging estilo viejo en plataformas BSD, dado a que
+a la interface <nombre de interface>.  Esta opción permite que dnsmasq
-los paquetes llegan a interfaces tap que no tienen una dirección IP.
+puede proporcionar los servicios DHCP y RA a través de interfaces
+ethernet sin dirección y sin puente; por ejemplo en un nodo de cálculo
+de OpenStack, donde cada una de esas interfaces es una interfaz TAP
+para una máquina virtual, o al usar bridging estilo viejo en
+plataformas BSD.
 .TP
 .B \-s, --domain=<dominio>[,<rango de IPs>]
 Especifica los dominios DNS para el servidor DHCP. Dominios pueden ser

man/fr/dnsmasq.8

@@ -852,7 +852,7 @@ et
 pour plus de détails).
 
 Pour IPv6, le mode peut-être une combinaison des valeurs
-.B ra-only, slaac, ra-names, ra-stateless.
+.B ra-only, slaac, ra-names, ra-stateless, off-link.
 
 .B ra-only
 indique à dnsmasq de n'effectuer que des annonces de routeur (Router
@@ -888,6 +888,9 @@ peut-être combiné avec
 et
 .B slaac.
 
+.B off-link
+indique à dnsmasq d'annoncer le préfixe sans le bit L (sur lien).
+
 .TP
 .B \-G, --dhcp-host=[<adresse matérielle>][,id:<identifiant client>|*][,set:<label>][,<adresse IP>][,<nom d'hôte>][,<durée de bail>][,ignore]
 Spécifie les paramètres DHCP relatifs à un hôte. Cela permet à une machine
@@ -1655,11 +1658,14 @@ changement d'état de bail à chaque changement de l'identifiant de client, de
 longueur de bail ou de date d'expiration.
 .TP
 .B --bridge-interface=<interface>,<alias>[,<alias>]
-Traiter les requêtes DHCP arrivant sur n'importe laquelle des interfaces <alias>
+Traiter les requêtes DHCP (v4 et v6) et IPv6 Router Solicit arrivant
-comme si elles arrivaient de l'interface <interface>. Cette option est
+sur n'importe laquelle des interfaces <alias> comme si elles
-nécessaire lors de l'utilisation de pont ethernet "ancien mode" sur plate-forme
+arrivaient de l'interface <interface>. Cette option permet à dnsmasq
-BSD, puisque dans ce cas les paquets arrivent sur des interfaces "tap" n'ont
+de fournir les service DHCP et RA sur les interfaces ethernet non
-pas d'adresse IP.
+adressés et non pontés; par exemple sur un hôte de calcul d'OpenStack
+où chaque telle interface est une interface TAP à une machine
+virtuelle, ou lors de l'utilisation de pont ethernet "ancien mode" sur
+plate-forme BSD.  Chaque <alias> peut finir avec un simple '*' joker.
 .TP
 .B \-s, --domain=<domaine>[,<gamme d'adresses>[,local]]
 Spécifie le domaine du serveur DHCP. Le domaine peut être donné de manière

src/auth.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -31,7 +31,7 @@ static struct addrlist *find_subnet(struct auth_zone *zone, int flag, struct all
 	  if (!(flag & F_IPV4))
 	    continue;
 	  
-	  netmask.s_addr = htonl(~((1 << (32 - subnet->prefixlen)) - 1));
+	  netmask.s_addr = htonl(~(in_addr_t)0 << (32 - subnet->prefixlen));
 	  
 	  if  (is_same_net(addr, subnet->addr.addr.addr4, netmask))
 	    return subnet;
@@ -131,24 +131,27 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	  continue;
 	}
 
-      if (qtype == T_PTR)
+      if ((qtype == T_PTR || qtype == T_SOA || qtype == T_NS) &&
+	  (flag = in_arpa_name_2_addr(name, &addr)) &&
+	  !local_query)
 	{
-	  if (!(flag = in_arpa_name_2_addr(name, &addr)))
+	  for (zone = daemon->auth_zones; zone; zone = zone->next)
-	    continue;
+	    if ((subnet = find_subnet(zone, flag, &addr)))
-
+	      break;
-	  if (!local_query)
+	  
+	  if (!zone)
 	    {
-	      for (zone = daemon->auth_zones; zone; zone = zone->next)
+	      auth = 0;
-		if ((subnet = find_subnet(zone, flag, &addr)))
+	      continue;
-		  break;
-	      
-	      if (!zone)
-		{
-		  auth = 0;
-		  continue;
-		}
 	    }
+	  else if (qtype == T_SOA)
+	    soa = 1, found = 1;
+	  else if (qtype == T_NS)
+	    ns = 1, found = 1;
+	}
 
+      if (qtype == T_PTR && flag)
+	{
 	  intr = NULL;
 
 	  if (flag == F_IPV4)
@@ -186,7 +189,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	  
 	  if (intr)
 	    {
-	      if (in_zone(zone, intr->name, NULL))
+	      if (local_query || in_zone(zone, intr->name, NULL))
 		{	
 		  found = 1;
 		  log_query(flag | F_REVERSE | F_CONFIG, intr->name, &addr, NULL);
@@ -208,8 +211,11 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		    *p = 0; /* must be bare name */
 		  
 		  /* add  external domain */
-		  strcat(name, ".");
+		  if (zone)
-		  strcat(name, zone->domain);
+		    {
+		      strcat(name, ".");
+		      strcat(name, zone->domain);
+		    }
 		  log_query(flag | F_DHCP | F_REVERSE, name, &addr, record_source(crecp->uid));
 		  found = 1;
 		  if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
@@ -217,7 +223,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 					  T_PTR, C_IN, "d", name))
 		    anscount++;
 		}
-	      else if (crecp->flags & (F_DHCP | F_HOSTS) && in_zone(zone, name, NULL))
+	      else if (crecp->flags & (F_DHCP | F_HOSTS) && (local_query || in_zone(zone, name, NULL)))
 		{
 		  log_query(crecp->flags & ~F_FORWARD, name, &addr, record_source(crecp->uid));
 		  found = 1;
@@ -240,14 +246,20 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	}
       
     cname_restart:
-      for (zone = daemon->auth_zones; zone; zone = zone->next)
+      if (found)
-	if (in_zone(zone, name, &cut))
+	/* NS and SOA .arpa requests have set found above. */
-	  break;
+	cut = NULL;
-      
+      else
-      if (!zone)
 	{
-	  auth = 0;
+	  for (zone = daemon->auth_zones; zone; zone = zone->next)
-	  continue;
+	    if (in_zone(zone, name, &cut))
+	      break;
+	  
+	  if (!zone)
+	    {
+	      auth = 0;
+	      continue;
+	    }
 	}
 
       for (rec = daemon->mxnames; rec; rec = rec->next)
@@ -363,6 +375,10 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		 if (((addrlist->flags & ADDRLIST_IPV6)  ? T_AAAA : T_A) == qtype &&
 		     (local_query || filter_zone(zone, flag, &addrlist->addr)))
 		   {
+#ifdef HAVE_IPV6
+		     if (addrlist->flags & ADDRLIST_REVONLY)
+		       continue;
+#endif
 		     found = 1;
 		     log_query(F_FORWARD | F_CONFIG | flag, name, &addrlist->addr, NULL);
 		     if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
@@ -409,7 +425,10 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		peer_addr->in.sin_port = 0;
 #ifdef HAVE_IPV6
 	      else
-		peer_addr->in6.sin6_port = 0; 
+		{
+		  peer_addr->in6.sin6_port = 0; 
+		  peer_addr->in6.sin6_scope_id = 0;
+		}
 #endif
 	      
 	      for (peers = daemon->auth_peers; peers; peers = peers->next)

src/blockdata.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/bpf.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -359,7 +359,7 @@ void send_via_bpf(struct dhcp_packet *mess, size_t len,
   iov[3].iov_base = mess;
   iov[3].iov_len = len;
 
-  while (writev(daemon->dhcp_raw_fd, iov, 4) == -1 && retry_send());
+  while (retry_send(writev(daemon->dhcp_raw_fd, iov, 4)));
 }
 
 #endif /* defined(HAVE_BSD_NETWORK) && defined(HAVE_DHCP) */
@@ -376,7 +376,7 @@ void route_init(void)
     die(_("cannot create PF_ROUTE socket: %s"), NULL, EC_BADNET);
 }
 
-void route_sock(time_t now)
+void route_sock(void)
 {
   struct if_msghdr *msg;
   int rc = recv(daemon->routefd, daemon->packet, daemon->packet_buff_sz, 0);
@@ -401,7 +401,7 @@ void route_sock(time_t now)
    else if (msg->ifm_type == RTM_NEWADDR)
      {
        del_family = 0;
-       newaddress(now);
+       queue_event(EVENT_NEWADDR);
      }
    else if (msg->ifm_type == RTM_DELADDR)
      {
@@ -439,7 +439,7 @@ void route_sock(time_t now)
 	       of += sizeof(long) - (diff & (sizeof(long) - 1));
 	   }
        
-       newaddress(now);
+       queue_event(EVENT_NEWADDR);
      }
 }
 

src/cache.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -322,7 +322,7 @@ static int is_expired(time_t now, struct crec *crecp)
   return 1;
 }
 
-static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsigned short flags)
+static struct crec *cache_scan_free(char *name, struct all_addr *addr, time_t now, unsigned short flags)
 {
   /* Scan and remove old entries.
      If (flags & F_FORWARD) then remove any forward entries for name and any expired
@@ -331,8 +331,8 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
      entries in the whole cache.
      If (flags == 0) remove any expired entries in the whole cache. 
 
-     In the flags & F_FORWARD case, the return code is valid, and returns zero if the
+     In the flags & F_FORWARD case, the return code is valid, and returns a non-NULL pointer
-     name exists in the cache as a HOSTS or DHCP entry (these are never deleted)
+     to a cache entry if the name exists in the cache as a HOSTS or DHCP entry (these are never deleted)
 
      We take advantage of the fact that hash chains have stuff in the order <reverse>,<other>,<immortal>
      so that when we hit an entry which isn't reverse and is immortal, we're done. */
@@ -361,7 +361,7 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
 		  (((crecp->flags | flags) & F_CNAME) && !(crecp->flags & (F_DNSKEY | F_DS))))
 		{
 		  if (crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG))
-		    return 0;
+		    return crecp;
 		  *up = crecp->hash_next;
 		  cache_unlink(crecp);
 		  cache_free(crecp);
@@ -378,7 +378,7 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
 		   crecp->addr.sig.type_covered == addr->addr.dnssec.type))
 		{
 		  if (crecp->flags & F_CONFIG)
-		    return 0;
+		    return crecp;
 		  *up = crecp->hash_next;
 		  cache_unlink(crecp);
 		  cache_free(crecp);
@@ -423,7 +423,7 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
 	    up = &crecp->hash_next;
     }
   
-  return 1;
+  return NULL;
 }
 
 /* Note: The normal calling sequence is
@@ -461,9 +461,11 @@ struct crec *cache_insert(char *name, struct all_addr *addr,
   if (flags & (F_IPV4 | F_IPV6 | F_CNAME))
     {
       log_query(flags | F_UPSTREAM, name, addr, NULL);
-      /* Don;t mess with TTL for DNSSEC records. */
+      /* Don't mess with TTL for DNSSEC records. */
       if (daemon->max_cache_ttl != 0 && daemon->max_cache_ttl < ttl)
 	ttl = daemon->max_cache_ttl;
+      if (daemon->min_cache_ttl != 0 && daemon->min_cache_ttl > ttl)
+	ttl = daemon->min_cache_ttl;
     }
 
   /* if previous insertion failed give up now. */
@@ -471,10 +473,26 @@ struct crec *cache_insert(char *name, struct all_addr *addr,
     return NULL;
   
   /* First remove any expired entries and entries for the name/address we
-     are currently inserting. Fail if we attempt to delete a name from
+     are currently inserting. */
-     /etc/hosts or DHCP. */
+  if ((new = cache_scan_free(name, addr, now, flags)))
-  if (!cache_scan_free(name, addr, now, flags))
     {
+      /* We're trying to insert a record over one from 
+	 /etc/hosts or DHCP, or other config. If the 
+	 existing record is for an A or AAAA and
+	 the record we're trying to insert is the same, 
+	 just drop the insert, but don't error the whole process. */
+      if ((flags & (F_IPV4 | F_IPV6)) && (flags & F_FORWARD))
+	{
+	  if ((flags & F_IPV4) && (new->flags & F_IPV4) &&
+	      new->addr.addr.addr.addr4.s_addr == addr->addr.addr4.s_addr)
+	    return new;
+#ifdef HAVE_IPV6
+	  else if ((flags & F_IPV6) && (new->flags & F_IPV6) &&
+		   IN6_ARE_ADDR_EQUAL(&new->addr.addr.addr.addr6, &addr->addr.addr6))
+	    return new;
+#endif
+	}
+      
       insert_error = 1;
       return NULL;
     }
@@ -636,7 +654,7 @@ struct crec *cache_find_by_name(struct crec *crecp, char *name, time_t now, unsi
 	    {
 	      if ((crecp->flags & F_FORWARD) && 
 #ifdef HAVE_DNSSEC
-		  ((crecp->flags & (F_DNSKEY | F_DS)) == (prot & (F_DNSKEY | F_DS))) &&
+		  (((crecp->flags & (F_DNSKEY | F_DS)) == (prot & (F_DNSKEY | F_DS))) || (prot & F_NSIGMATCH)) &&
 #endif
 		  (crecp->flags & prot) &&
 		  hostname_isequal(cache_get_name(crecp), name))
@@ -696,7 +714,7 @@ struct crec *cache_find_by_name(struct crec *crecp, char *name, time_t now, unsi
   if (ans && 
       (ans->flags & F_FORWARD) &&
 #ifdef HAVE_DNSSEC
-      ((ans->flags & (F_DNSKEY | F_DS)) == (prot & (F_DNSKEY | F_DS))) &&
+      (((ans->flags & (F_DNSKEY | F_DS)) == (prot & (F_DNSKEY | F_DS))) || (prot & F_NSIGMATCH)) &&
 #endif
       (ans->flags & prot) &&     
       hostname_isequal(cache_get_name(ans), name))
@@ -817,27 +835,42 @@ static void add_hosts_entry(struct crec *cache, struct all_addr *addr, int addrl
      Only insert each unique address once into this hashing structure.
 
      This complexity avoids O(n^2) divergent CPU use whilst reading
-     large (10000 entry) hosts files. */
+     large (10000 entry) hosts files. 
+
+     Note that we only do this process when bulk-reading hosts files, 
+     for incremental reads, rhash is NULL, and we use cache lookups
+     instead.
+  */
   
-  /* hash address */
+  if (rhash)
-  for (j = 0, i = 0; i < addrlen; i++)
-    j = (j*2 +((unsigned char *)addr)[i]) % hashsz;
-  
-  for (lookup = rhash[j]; lookup; lookup = lookup->next)
-    if ((lookup->flags & cache->flags & (F_IPV4 | F_IPV6)) &&
-	memcmp(&lookup->addr.addr, addr, addrlen) == 0)
-      {
-	cache->flags &= ~F_REVERSE;
-	break;
-      }
-  
-  /* maintain address hash chain, insert new unique address */
-  if (!lookup)
     {
-      cache->next = rhash[j];
+      /* hash address */
-      rhash[j] = cache;
+      for (j = 0, i = 0; i < addrlen; i++)
+	j = (j*2 +((unsigned char *)addr)[i]) % hashsz;
+      
+      for (lookup = rhash[j]; lookup; lookup = lookup->next)
+	if ((lookup->flags & cache->flags & (F_IPV4 | F_IPV6)) &&
+	    memcmp(&lookup->addr.addr, addr, addrlen) == 0)
+	  {
+	    cache->flags &= ~F_REVERSE;
+	    break;
+	  }
+      
+      /* maintain address hash chain, insert new unique address */
+      if (!lookup)
+	{
+	  cache->next = rhash[j];
+	  rhash[j] = cache;
+	}
     }
-  
+  else
+    {
+      /* incremental read, lookup in cache */
+      lookup = cache_find_by_addr(NULL, addr, 0, cache->flags & (F_IPV4 | F_IPV6));
+      if (lookup && lookup->flags & F_HOSTS)
+	cache->flags &= ~F_REVERSE;
+    }
+
   cache->uid = index;
   memcpy(&cache->addr.addr, addr, addrlen);  
   cache_hash(cache);
@@ -894,7 +927,7 @@ static int gettok(FILE *f, char *token)
     }
 }
 
-static int read_hostsfile(char *filename, unsigned int index, int cache_size, struct crec **rhash, int hashsz)
+int read_hostsfile(char *filename, unsigned int index, int cache_size, struct crec **rhash, int hashsz)
 {  
   FILE *f = fopen(filename, "r");
   char *token = daemon->namebuff, *domain_suffix = NULL;
@@ -940,7 +973,7 @@ static int read_hostsfile(char *filename, unsigned int index, int cache_size, st
       addr_count++;
       
       /* rehash every 1000 names. */
-      if ((name_count - cache_size) > 1000)
+      if (rhash && ((name_count - cache_size) > 1000))
 	{
 	  rehash(name_count);
 	  cache_size = name_count;
@@ -987,7 +1020,9 @@ static int read_hostsfile(char *filename, unsigned int index, int cache_size, st
     } 
 
   fclose(f);
-  rehash(name_count);
+  
+  if (rhash)
+    rehash(name_count); 
   
   my_syslog(LOG_INFO, _("read %s - %d addresses"), filename, addr_count);
   
@@ -1098,16 +1133,22 @@ void cache_reload(void)
     {
       if (daemon->cachesize > 0)
 	my_syslog(LOG_INFO, _("cleared cache"));
-      return;
     }
-    
+  else
-  if (!option_bool(OPT_NO_HOSTS))
+    {
-    total_size = read_hostsfile(HOSTSFILE, SRC_HOSTS, total_size, (struct crec **)daemon->packet, revhashsz);
+      if (!option_bool(OPT_NO_HOSTS))
-  	   
+	total_size = read_hostsfile(HOSTSFILE, SRC_HOSTS, total_size, (struct crec **)daemon->packet, revhashsz);
-  daemon->addn_hosts = expand_filelist(daemon->addn_hosts);
+      
-  for (ah = daemon->addn_hosts; ah; ah = ah->next)
+      daemon->addn_hosts = expand_filelist(daemon->addn_hosts);
-    if (!(ah->flags & AH_INACTIVE))
+      for (ah = daemon->addn_hosts; ah; ah = ah->next)
-      total_size = read_hostsfile(ah->fname, ah->index, total_size, (struct crec **)daemon->packet, revhashsz);
+	if (!(ah->flags & AH_INACTIVE))
+	  total_size = read_hostsfile(ah->fname, ah->index, total_size, (struct crec **)daemon->packet, revhashsz);
+    }
+
+#ifdef HAVE_INOTIFY
+  set_dynamic_inotify(AH_HOSTS, total_size, (struct crec **)daemon->packet, revhashsz);
+#endif
+  
 } 
 
 #ifdef HAVE_DHCP
@@ -1326,7 +1367,7 @@ int cache_make_stat(struct txt_record *t)
 		}
 	    port = prettyprint_addr(&serv->addr, daemon->addrbuff);
 	    lenp = p++; /* length */
-	    bytes_avail = (p - buff) + bufflen;
+	    bytes_avail = bufflen - (p - buff );
 	    bytes_needed = snprintf(p, bytes_avail, "%s#%d %u %u", daemon->addrbuff, port, queries, failed_queries);
 	    if (bytes_needed >= bytes_avail)
 	      {
@@ -1340,7 +1381,7 @@ int cache_make_stat(struct txt_record *t)
 		lenp = p - 1;
 		buff = new;
 		bufflen = newlen;
-		bytes_avail = (p - buff) + bufflen;
+		bytes_avail =  bufflen - (p - buff );
 		bytes_needed = snprintf(p, bytes_avail, "%s#%d %u %u", daemon->addrbuff, port, queries, failed_queries);
 	      }
 	    *lenp = bytes_needed;
@@ -1358,6 +1399,20 @@ int cache_make_stat(struct txt_record *t)
   return 1;
 }
 
+/* There can be names in the cache containing control chars, don't 
+   mess up logging or open security holes. */
+static char *sanitise(char *name)
+{
+  unsigned char *r;
+  if (name)
+    for (r = (unsigned char *)name; *r; r++)
+      if (!isprint((int)*r))
+	return "<name unprintable>";
+
+  return name;
+}
+
+
 void dump_cache(time_t now)
 {
   struct server *serv, *serv1;
@@ -1411,9 +1466,9 @@ void dump_cache(time_t now)
 	    *a = 0;
 	    if (strlen(n) == 0 && !(cache->flags & F_REVERSE))
 	      n = "<Root>";
-	    p += sprintf(p, "%-40.40s ", n);
+	    p += sprintf(p, "%-30.30s ", sanitise(n));
 	    if ((cache->flags & F_CNAME) && !is_outdated_cname_pointer(cache))
-	      a = cache_get_cname_target(cache);
+	      a = sanitise(cache_get_cname_target(cache));
 #ifdef HAVE_DNSSEC
 	    else if (cache->flags & F_DS)
 	      {
@@ -1454,7 +1509,7 @@ void dump_cache(time_t now)
 	    else if (cache->flags & F_DNSKEY)
 	      t = "K";
 #endif
-	    p += sprintf(p, "%-30.30s %s%s%s%s%s%s%s%s%s  ", a, t,
+	    p += sprintf(p, "%-40.40s %s%s%s%s%s%s%s%s%s  ", a, t,
 			 cache->flags & F_FORWARD ? "F" : " ",
 			 cache->flags & F_REVERSE ? "R" : " ",
 			 cache->flags & F_IMMORTAL ? "I" : " ",
@@ -1487,7 +1542,13 @@ char *record_source(unsigned int index)
   for (ah = daemon->addn_hosts; ah; ah = ah->next)
     if (ah->index == index)
       return ah->fname;
-  
+
+#ifdef HAVE_INOTIFY
+  for (ah = daemon->dynamic_dirs; ah; ah = ah->next)
+     if (ah->index == index)
+       return ah->fname;
+#endif
+
   return "<unknown>";
 }
 
@@ -1540,6 +1601,8 @@ void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg)
   if (!option_bool(OPT_LOG))
     return;
 
+  name = sanitise(name);
+
   if (addr)
     {
       if (flags & F_KEYTAG)
@@ -1622,7 +1685,16 @@ void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg)
   if (strlen(name) == 0)
     name = ".";
 
-  my_syslog(LOG_INFO, "%s %s %s %s", source, name, verb, dest);
+  if (option_bool(OPT_EXTRALOG))
+    {
+      int port = prettyprint_addr(daemon->log_source_addr, daemon->addrbuff2);
+      if (flags & F_NOEXTRA)
+	my_syslog(LOG_INFO, "* %s/%u %s %s %s %s", daemon->addrbuff2, port, source, name, verb, dest);
+      else
+	my_syslog(LOG_INFO, "%u %s/%u %s %s %s %s", daemon->log_display_id, daemon->addrbuff2, port, source, name, verb, dest);
+    }
+  else
+    my_syslog(LOG_INFO, "%s %s %s %s", source, name, verb, dest);
 }
 
  

src/config.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -17,7 +17,9 @@
 #define FTABSIZ 150 /* max number of outstanding requests (default) */
 #define MAX_PROCS 20 /* max no children for TCP requests */
 #define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */
+#define TCP_MAX_QUERIES 100 /* Maximum number of queries per incoming TCP connection */
 #define EDNS_PKTSZ 4096 /* default max EDNS.0 UDP packet from RFC5625 */
+#define SAFE_PKTSZ 1280 /* "go anywhere" UDP packet size */
 #define KEYBLOCK_LEN 40 /* choose to mininise fragmentation when storing DNSSEC keys */
 #define DNSSEC_WORK 50 /* Max number of queries to validate one question */
 #define TIMEOUT 10 /* drop UDP queries after TIMEOUT seconds */
@@ -26,6 +28,7 @@
 #define RANDOM_SOCKS 64 /* max simultaneous random ports */
 #define LEASE_RETRY 60 /* on error, retry writing leasefile after LEASE_RETRY seconds */
 #define CACHESIZ 150 /* default cache size */
+#define TTL_FLOOR_LIMIT 3600 /* don't allow --min-cache-ttl to raise TTL above this under any circumstances */
 #define MAXLEASES 1000 /* maximum number of DHCP leases */
 #define PING_WAIT 3 /* wait for ping address-in-use test */
 #define PING_CACHE_TIME 30 /* Ping test assumed to be valid this long. */
@@ -47,6 +50,8 @@
 #define SOA_REFRESH 1200 /* SOA refresh default */
 #define SOA_RETRY 180 /* SOA retry default */
 #define SOA_EXPIRY 1209600 /* SOA expiry default */
+#define LOOP_TEST_DOMAIN "test" /* domain for loop testing, "test" is reserved by RFC 2606 and won't therefore clash */
+#define LOOP_TEST_TYPE T_TXT
  
 /* compile-time options: uncomment below to enable or do eg.
    make COPTS=-DHAVE_BROKEN_RTC
@@ -105,6 +110,14 @@ HAVE_AUTH
    define this to include the facility to act as an authoritative DNS
    server for one or more zones.
 
+HAVE_DNSSEC
+   include DNSSEC validator.
+
+HAVE_LOOP
+   include functionality to probe for and remove DNS forwarding loops.
+
+HAVE_INOTIFY
+   use the Linux inotify facility to efficiently re-read configuration files.
 
 NO_IPV6
 NO_TFTP
@@ -113,11 +126,17 @@ NO_DHCP6
 NO_SCRIPT
 NO_LARGEFILE
 NO_AUTH
+NO_INOTIFY
    these are avilable to explictly disable compile time options which would 
    otherwise be enabled automatically (HAVE_IPV6, >2Gb file sizes) or 
    which are enabled  by default in the distributed source tree. Building dnsmasq
    with something like "make COPTS=-DNO_SCRIPT" will do the trick.
 
+NO_NETTLE_ECC
+   Don't include the ECDSA cypher in DNSSEC validation. Needed for older Nettle versions.
+NO_GMP
+   Don't use and link against libgmp, Useful if nettle is built with --enable-mini-gmp.
+
 LEASEFILE
 CONFFILE
 RESOLVFILE
@@ -141,6 +160,7 @@ RESOLVFILE
 #define HAVE_SCRIPT
 #define HAVE_AUTH
 #define HAVE_IPSET 
+#define HAVE_LOOP
 
 /* Build options which require external libraries.
    
@@ -261,6 +281,7 @@ HAVE_SOCKADDR_SA_LEN
 /* Select the RFC_3542 version of the IPv6 socket API. 
    Define before netinet6/in6.h is included. */
 #define __APPLE_USE_RFC_3542 
+#define NO_IPSET
 
 #elif defined(__NetBSD__)
 #define HAVE_BSD_NETWORK
@@ -334,6 +355,14 @@ HAVE_SOCKADDR_SA_LEN
 #undef HAVE_IPSET
 #endif
 
+#ifdef NO_LOOP
+#undef HAVE_LOOP
+#endif
+
+#if defined (HAVE_LINUX_NETWORK) && !defined(NO_INOTIFY)
+#define HAVE_INOTIFY
+#endif
+
 /* Define a string indicating which options are in use.
    DNSMASQP_COMPILE_OPTS is only defined in dnsmasq.c */
 
@@ -403,7 +432,15 @@ static char *compile_opts =
 #ifndef HAVE_DNSSEC
 "no-"
 #endif
-"DNSSEC";
+"DNSSEC "
+#ifndef HAVE_LOOP
+"no-"
+#endif
+"loop-detect "
+#ifndef HAVE_INOTIFY
+"no-"
+#endif
+"inotify";
 
 
 #endif

src/conntrack.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/dbus.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -35,6 +35,11 @@ const char* introspection_xml_template =
 "    <method name=\"GetVersion\">\n"
 "      <arg name=\"version\" direction=\"out\" type=\"s\"/>\n"
 "    </method>\n"
+#ifdef HAVE_LOOP
+"    <method name=\"GetLoopServers\">\n"
+"      <arg name=\"server\" direction=\"out\" type=\"as\"/>\n"
+"    </method>\n"
+#endif
 "    <method name=\"SetServers\">\n"
 "      <arg name=\"servers\" direction=\"in\" type=\"av\"/>\n"
 "    </method>\n"
@@ -44,6 +49,12 @@ const char* introspection_xml_template =
 "    <method name=\"SetServersEx\">\n"
 "      <arg name=\"servers\" direction=\"in\" type=\"aas\"/>\n"
 "    </method>\n"
+"    <method name=\"SetFilterWin2KOption\">\n"
+"      <arg name=\"filterwin2k\" direction=\"in\" type=\"b\"/>\n"
+"    </method>\n"
+"    <method name=\"SetBogusPrivOption\">\n"
+"      <arg name=\"boguspriv\" direction=\"in\" type=\"b\"/>\n"
+"    </method>\n"
 "    <signal name=\"DhcpLeaseAdded\">\n"
 "      <arg name=\"ipaddr\" type=\"s\"/>\n"
 "      <arg name=\"hwaddr\" type=\"s\"/>\n"
@@ -59,6 +70,21 @@ const char* introspection_xml_template =
 "      <arg name=\"hwaddr\" type=\"s\"/>\n"
 "      <arg name=\"hostname\" type=\"s\"/>\n"
 "    </signal>\n"
+#ifdef HAVE_DHCP
+"    <method name=\"AddDhcpLease\">\n"
+"       <arg name=\"ipaddr\" type=\"s\"/>\n"
+"       <arg name=\"hwaddr\" type=\"s\"/>\n"
+"       <arg name=\"hostname\" type=\"ay\"/>\n"
+"       <arg name=\"clid\" type=\"ay\"/>\n"
+"       <arg name=\"lease_duration\" type=\"u\"/>\n"
+"       <arg name=\"ia_id\" type=\"u\"/>\n"
+"       <arg name=\"is_temporary\" type=\"b\"/>\n"
+"    </method>\n"
+"    <method name=\"DeleteDhcpLease\">\n"
+"       <arg name=\"ipaddr\" type=\"s\"/>\n"
+"       <arg name=\"success\" type=\"b\" direction=\"out\"/>\n"
+"    </method>\n"
+#endif
 "  </interface>\n"
 "</node>\n";
 
@@ -150,13 +176,16 @@ static void dbus_read_servers(DBusMessage *message)
 	      dbus_message_iter_get_basic(&iter, &p[i]);
 	      dbus_message_iter_next (&iter);
 	      if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BYTE)
-		break;
+		{
+		  i++;
+		  break;
+		}
 	    }
 
 #ifndef HAVE_IPV6
 	  my_syslog(LOG_WARNING, _("attempt to set an IPv6 server address via DBus - no IPv6 support"));
 #else
-	  if (i == sizeof(struct in6_addr)-1)
+	  if (i == sizeof(struct in6_addr))
 	    {
 	      memcpy(&addr.in6.sin6_addr, p, sizeof(struct in6_addr));
 #ifdef HAVE_SOCKADDR_SA_LEN
@@ -196,6 +225,29 @@ static void dbus_read_servers(DBusMessage *message)
   cleanup_servers();
 }
 
+#ifdef HAVE_LOOP
+static DBusMessage *dbus_reply_server_loop(DBusMessage *message)
+{
+  DBusMessageIter args, args_iter;
+  struct server *serv;
+  DBusMessage *reply = dbus_message_new_method_return(message);
+   
+  dbus_message_iter_init_append (reply, &args);
+  dbus_message_iter_open_container (&args, DBUS_TYPE_ARRAY,DBUS_TYPE_STRING_AS_STRING, &args_iter);
+
+  for (serv = daemon->servers; serv; serv = serv->next)
+    if (serv->flags & SERV_LOOP)
+      {
+	prettyprint_addr(&serv->addr, daemon->addrbuff);
+	dbus_message_iter_append_basic (&args_iter, DBUS_TYPE_STRING, &daemon->addrbuff);
+      }
+  
+  dbus_message_iter_close_container (&args, &args_iter);
+
+  return reply;
+}
+#endif
+
 static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
 {
   DBusMessageIter iter, array_iter, string_iter;
@@ -372,6 +424,196 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
   return error;
 }
 
+static DBusMessage *dbus_set_bool(DBusMessage *message, int flag, char *name)
+{
+  DBusMessageIter iter;
+  dbus_bool_t enabled;
+
+  if (!dbus_message_iter_init(message, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS, "Expected boolean argument");
+  
+  dbus_message_iter_get_basic(&iter, &enabled);
+
+  if (enabled)
+    { 
+      my_syslog(LOG_INFO, _("Enabling --%s option from D-Bus"), name);
+      set_option_bool(flag);
+    }
+  else
+    {
+      my_syslog(LOG_INFO, _("Disabling --%s option from D-Bus"), name);
+      reset_option_bool(flag);
+    }
+
+  return NULL;
+}
+
+#ifdef HAVE_DHCP
+static DBusMessage *dbus_add_lease(DBusMessage* message)
+{
+  struct dhcp_lease *lease;
+  const char *ipaddr, *hwaddr, *hostname, *tmp;
+  const unsigned char* clid;
+  int clid_len, hostname_len, hw_len, hw_type;
+  dbus_uint32_t expires, ia_id;
+  dbus_bool_t is_temporary;
+  struct all_addr addr;
+  time_t now = dnsmasq_time();
+  unsigned char dhcp_chaddr[DHCP_CHADDR_MAX];
+
+  DBusMessageIter iter, array_iter;
+  if (!dbus_message_iter_init(message, &iter))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Failed to initialize dbus message iter");
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected string as first argument");
+
+  dbus_message_iter_get_basic(&iter, &ipaddr);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected string as second argument");
+    
+  dbus_message_iter_get_basic(&iter, &hwaddr);
+  dbus_message_iter_next(&iter);
+
+  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
+      (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected byte array as third argument");
+    
+  dbus_message_iter_recurse(&iter, &array_iter);
+  dbus_message_iter_get_fixed_array(&array_iter, &hostname, &hostname_len);
+  tmp = memchr(hostname, '\0', hostname_len);
+  if (tmp)
+    {
+      if (tmp == &hostname[hostname_len - 1])
+	hostname_len--;
+      else
+	return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				      "Hostname contains an embedded NUL character");
+    }
+  dbus_message_iter_next(&iter);
+
+  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
+      (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected byte array as fourth argument");
+
+  dbus_message_iter_recurse(&iter, &array_iter);
+  dbus_message_iter_get_fixed_array(&array_iter, &clid, &clid_len);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected uint32 as fifth argument");
+    
+  dbus_message_iter_get_basic(&iter, &expires);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+                                    "Expected uint32 as sixth argument");
+  
+  dbus_message_iter_get_basic(&iter, &ia_id);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected uint32 as sixth argument");
+
+  dbus_message_iter_get_basic(&iter, &is_temporary);
+
+  if (inet_pton(AF_INET, ipaddr, &addr.addr.addr4))
+    {
+      if (ia_id != 0 || is_temporary)
+	return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				      "ia_id and is_temporary must be zero for IPv4 lease");
+      
+      if (!(lease = lease_find_by_addr(addr.addr.addr4)))
+    	lease = lease4_allocate(addr.addr.addr4);
+    }
+#ifdef HAVE_DHCP6
+  else if (inet_pton(AF_INET6, ipaddr, &addr.addr.addr6))
+    {
+      if (!(lease = lease6_find_by_addr(&addr.addr.addr6, 128, 0)))
+	lease = lease6_allocate(&addr.addr.addr6,
+				is_temporary ? LEASE_TA : LEASE_NA);
+      lease_set_iaid(lease, ia_id);
+    }
+#endif
+  else
+    return dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
+					 "Invalid IP address '%s'", ipaddr);
+   
+  hw_len = parse_hex((char*)hwaddr, dhcp_chaddr, DHCP_CHADDR_MAX, NULL,
+		     &hw_type);
+  if (hw_type == 0 && hw_len != 0)
+    hw_type = ARPHRD_ETHER;
+
+    lease_set_hwaddr(lease, dhcp_chaddr, clid, hw_len, hw_type,
+                   clid_len, now, 0);
+  lease_set_expires(lease, expires, now);
+  if (hostname_len != 0)
+    lease_set_hostname(lease, hostname, 0, get_domain(lease->addr), NULL);
+    
+  lease_update_file(now);
+  lease_update_dns(0);
+
+  return NULL;
+}
+
+static DBusMessage *dbus_del_lease(DBusMessage* message)
+{
+  struct dhcp_lease *lease;
+  DBusMessageIter iter;
+  const char *ipaddr;
+  DBusMessage *reply;
+  struct all_addr addr;
+  dbus_bool_t ret = 1;
+  time_t now = dnsmasq_time();
+
+  if (!dbus_message_iter_init(message, &iter))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Failed to initialize dbus message iter");
+   
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected string as first argument");
+   
+  dbus_message_iter_get_basic(&iter, &ipaddr);
+
+  if (inet_pton(AF_INET, ipaddr, &addr.addr.addr4))
+    lease = lease_find_by_addr(addr.addr.addr4);
+#ifdef HAVE_DHCP6
+  else if (inet_pton(AF_INET6, ipaddr, &addr.addr.addr6))
+    lease = lease6_find_by_addr(&addr.addr.addr6, 128, 0);
+#endif
+  else
+    return dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
+					 "Invalid IP address '%s'", ipaddr);
+    
+  if (lease)
+    {
+      lease_prune(lease, now);
+      lease_update_file(now);
+      lease_update_dns(0);
+    }
+  else
+    ret = 0;
+  
+  if ((reply = dbus_message_new_method_return(message)))
+    dbus_message_append_args(reply, DBUS_TYPE_BOOLEAN, &ret,
+			     DBUS_TYPE_INVALID);
+  
+    
+  return reply;
+}
+#endif
+
 DBusHandlerResult message_handler(DBusConnection *connection, 
 				  DBusMessage *message, 
 				  void *user_data)
@@ -400,6 +642,12 @@ DBusHandlerResult message_handler(DBusConnection *connection,
       
       dbus_message_append_args(reply, DBUS_TYPE_STRING, &v, DBUS_TYPE_INVALID);
     }
+#ifdef HAVE_LOOP
+  else if (strcmp(method, "GetLoopServers") == 0)
+    {
+      reply = dbus_reply_server_loop(message);
+    }
+#endif
   else if (strcmp(method, "SetServers") == 0)
     {
       dbus_read_servers(message);
@@ -415,6 +663,24 @@ DBusHandlerResult message_handler(DBusConnection *connection,
       reply = dbus_read_servers_ex(message, 1);
       new_servers = 1;
     }
+  else if (strcmp(method, "SetFilterWin2KOption") == 0)
+    {
+      reply = dbus_set_bool(message, OPT_FILTER, "filterwin2k");
+    }
+  else if (strcmp(method, "SetBogusPrivOption") == 0)
+    {
+      reply = dbus_set_bool(message, OPT_BOGUSPRIV, "bogus-priv");
+    }
+#ifdef HAVE_DHCP
+  else if (strcmp(method, "AddDhcpLease") == 0)
+    {
+      reply = dbus_add_lease(message);
+    }
+  else if (strcmp(method, "DeleteDhcpLease") == 0)
+    {
+      reply = dbus_del_lease(message);
+    }
+#endif
   else if (strcmp(method, "ClearCache") == 0)
     clear_cache = 1;
   else
@@ -483,8 +749,7 @@ char *dbus_init(void)
 }
  
 
-void set_dbus_listeners(int *maxfdp,
+void set_dbus_listeners(void)
-			fd_set *rset, fd_set *wset, fd_set *eset)
 {
   struct watch *w;
   
@@ -494,19 +759,17 @@ void set_dbus_listeners(int *maxfdp,
 	unsigned int flags = dbus_watch_get_flags(w->watch);
 	int fd = dbus_watch_get_unix_fd(w->watch);
 	
-	bump_maxfd(fd, maxfdp);
-	
 	if (flags & DBUS_WATCH_READABLE)
-	  FD_SET(fd, rset);
+	  poll_listen(fd, POLLIN);
 	
 	if (flags & DBUS_WATCH_WRITABLE)
-	  FD_SET(fd, wset);
+	  poll_listen(fd, POLLOUT);
 	
-	FD_SET(fd, eset);
+	poll_listen(fd, POLLERR);
       }
 }
 
-void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset)
+void check_dbus_listeners()
 {
   DBusConnection *connection = (DBusConnection *)daemon->dbus;
   struct watch *w;
@@ -517,13 +780,13 @@ void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset)
 	unsigned int flags = 0;
 	int fd = dbus_watch_get_unix_fd(w->watch);
 	
-	if (FD_ISSET(fd, rset))
+	if (poll_check(fd, POLLIN))
 	  flags |= DBUS_WATCH_READABLE;
 	
-	if (FD_ISSET(fd, wset))
+	if (poll_check(fd, POLLOUT))
 	  flags |= DBUS_WATCH_WRITABLE;
 	
-	if (FD_ISSET(fd, eset))
+	if (poll_check(fd, POLLERR))
 	  flags |= DBUS_WATCH_ERROR;
 
 	if (flags != 0)
@@ -558,7 +821,7 @@ void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname)
    if (lease->flags & (LEASE_TA | LEASE_NA))
      {
        print_mac(mac, lease->clid, lease->clid_len);
-       inet_ntop(AF_INET6, lease->hwaddr, daemon->addrbuff, ADDRSTRLEN);
+       inet_ntop(AF_INET6, &lease->addr6, daemon->addrbuff, ADDRSTRLEN);
      }
    else
 #endif

src/dhcp-common.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -545,8 +545,8 @@ static const struct opttab_t {
   { "parameter-request", 55, OT_INTERNAL },
   { "message", 56, OT_INTERNAL },
   { "max-message-size", 57, OT_INTERNAL },
-  { "T1", 58, OT_INTERNAL | OT_TIME},
+  { "T1", 58, OT_TIME},
-  { "T2", 59, OT_INTERNAL | OT_TIME},
+  { "T2", 59, OT_TIME},
   { "vendor-class", 60, 0 },
   { "client-id", 61, OT_INTERNAL },
   { "nis+-domain", 64, OT_NAME },

src/dhcp-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/dhcp.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -225,18 +225,21 @@ void dhcp_packet(time_t now, int pxe_fd)
   strncpy(arp_req.arp_dev, ifr.ifr_name, 16);
 #endif 
 
-   /* One form of bridging on BSD has the property that packets
+  /* If the interface on which the DHCP request was received is an
-      can be recieved on bridge interfaces which do not have an IP address.
+     alias of some other interface (as specified by the
-      We allow these to be treated as aliases of another interface which does have
+     --bridge-interface option), change ifr.ifr_name so that we look
-      an IP address with --dhcp-bridge=interface,alias,alias */
+     for DHCP contexts associated with the aliased interface instead
+     of with the aliasing one. */
   for (bridge = daemon->bridges; bridge; bridge = bridge->next)
     {
       for (alias = bridge->alias; alias; alias = alias->next)
-	if (strncmp(ifr.ifr_name, alias->iface, IF_NAMESIZE) == 0)
+	if (wildcard_matchn(alias->iface, ifr.ifr_name, IF_NAMESIZE))
 	  {
 	    if (!(iface_index = if_nametoindex(bridge->iface)))
 	      {
-		my_syslog(LOG_WARNING, _("unknown interface %s in bridge-interface"), ifr.ifr_name);
+		my_syslog(MS_DHCP | LOG_WARNING,
+			  _("unknown interface %s in bridge-interface"),
+			  bridge->iface);
 		return;
 	      }
 	    else 
@@ -376,10 +379,9 @@ void dhcp_packet(time_t now, int pxe_fd)
 	}
     } 
 #if defined(HAVE_LINUX_NETWORK)
-  else if ((ntohs(mess->flags) & 0x8000) || mess->hlen == 0 ||
+  else
-	   mess->hlen > sizeof(ifr.ifr_addr.sa_data) || mess->htype == 0)
     {
-      /* broadcast to 255.255.255.255 (or mac address invalid) */
+      /* fill cmsg for outbound interface (both broadcast & unicast) */
       struct in_pktinfo *pkt;
       msg.msg_control = control_u.control;
       msg.msg_controllen = sizeof(control_u);
@@ -389,23 +391,29 @@ void dhcp_packet(time_t now, int pxe_fd)
       pkt->ipi_spec_dst.s_addr = 0;
       msg.msg_controllen = cmptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
       cmptr->cmsg_level = IPPROTO_IP;
-      cmptr->cmsg_type = IP_PKTINFO;  
+      cmptr->cmsg_type = IP_PKTINFO;
-      dest.sin_addr.s_addr = INADDR_BROADCAST;
+
-      dest.sin_port = htons(daemon->dhcp_client_port);
+      if ((ntohs(mess->flags) & 0x8000) || mess->hlen == 0 ||
-    }
+         mess->hlen > sizeof(ifr.ifr_addr.sa_data) || mess->htype == 0)
-  else
+        {
-    {
+          /* broadcast to 255.255.255.255 (or mac address invalid) */
-      /* unicast to unconfigured client. Inject mac address direct into ARP cache. 
+          dest.sin_addr.s_addr = INADDR_BROADCAST;
-	 struct sockaddr limits size to 14 bytes. */
+          dest.sin_port = htons(daemon->dhcp_client_port);
-      dest.sin_addr = mess->yiaddr;
+        }
-      dest.sin_port = htons(daemon->dhcp_client_port);
+      else
-      memcpy(&arp_req.arp_pa, &dest, sizeof(struct sockaddr_in));
+        {
-      arp_req.arp_ha.sa_family = mess->htype;
+          /* unicast to unconfigured client. Inject mac address direct into ARP cache.
-      memcpy(arp_req.arp_ha.sa_data, mess->chaddr, mess->hlen);
+          struct sockaddr limits size to 14 bytes. */
-      /* interface name already copied in */
+          dest.sin_addr = mess->yiaddr;
-      arp_req.arp_flags = ATF_COM;
+          dest.sin_port = htons(daemon->dhcp_client_port);
-      if (ioctl(daemon->dhcpfd, SIOCSARP, &arp_req) == -1)
+          memcpy(&arp_req.arp_pa, &dest, sizeof(struct sockaddr_in));
-	my_syslog(MS_DHCP | LOG_ERR, _("ARP-cache injection failed: %s"), strerror(errno));
+          arp_req.arp_ha.sa_family = mess->htype;
+          memcpy(arp_req.arp_ha.sa_data, mess->chaddr, mess->hlen);
+          /* interface name already copied in */
+          arp_req.arp_flags = ATF_COM;
+          if (ioctl(daemon->dhcpfd, SIOCSARP, &arp_req) == -1)
+            my_syslog(MS_DHCP | LOG_ERR, _("ARP-cache injection failed: %s"), strerror(errno));
+        }
     }
 #elif defined(HAVE_SOLARIS_NETWORK)
   else if ((ntohs(mess->flags) & 0x8000) || mess->hlen != ETHER_ADDR_LEN || mess->htype != ARPHRD_ETHER)
@@ -443,7 +451,7 @@ void dhcp_packet(time_t now, int pxe_fd)
   setsockopt(fd, IPPROTO_IP, IP_BOUND_IF, &iface_index, sizeof(iface_index));
 #endif
   
-  while(sendmsg(fd, &msg, 0) == -1 && retry_send());
+  while(retry_send(sendmsg(fd, &msg, 0)));
 }
  
 /* check against secondary interface addresses */

src/dhcp6-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/dhcp6.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -144,6 +144,8 @@ void dhcp6_packet(time_t now)
 
   if ((port = relay_reply6(&from, sz, ifr.ifr_name)) == 0)
     {
+      struct dhcp_bridge *bridge, *alias;
+
       for (tmp = daemon->if_except; tmp; tmp = tmp->next)
 	if (tmp->name && wildcard_match(tmp->name, ifr.ifr_name))
 	  return;
@@ -160,6 +162,30 @@ void dhcp6_packet(time_t now)
       memset(&parm.fallback, 0, IN6ADDRSZ);
       memset(&parm.ll_addr, 0, IN6ADDRSZ);
       memset(&parm.ula_addr, 0, IN6ADDRSZ);
+
+      /* If the interface on which the DHCPv6 request was received is
+         an alias of some other interface (as specified by the
+         --bridge-interface option), change parm.ind so that we look
+         for DHCPv6 contexts associated with the aliased interface
+         instead of with the aliasing one. */
+      for (bridge = daemon->bridges; bridge; bridge = bridge->next)
+	{
+	  for (alias = bridge->alias; alias; alias = alias->next)
+	    if (wildcard_matchn(alias->iface, ifr.ifr_name, IF_NAMESIZE))
+	      {
+		parm.ind = if_nametoindex(bridge->iface);
+		if (!parm.ind)
+		  {
+		    my_syslog(MS_DHCP | LOG_WARNING,
+			      _("unknown interface %s in bridge-interface"),
+			      bridge->iface);
+		    return;
+		  }
+		break;
+	      }
+	  if (alias)
+	    break;
+	}
       
       for (context = daemon->dhcp6; context; context = context->next)
 	if (IN6_IS_ADDR_UNSPECIFIED(&context->start6) && context->prefix == 0)
@@ -208,7 +234,7 @@ void dhcp6_packet(time_t now)
       /* May have configured relay, but not DHCP server */
       if (!daemon->doing_dhcp6)
 	return;
-      
+
       lease_prune(NULL, now); /* lose any expired leases */
       
       port = dhcp6_reply(parm.current, if_index, ifr.ifr_name, &parm.fallback, 
@@ -225,9 +251,9 @@ void dhcp6_packet(time_t now)
   if (port != 0)
     {
       from.sin6_port = htons(port);
-      while (sendto(daemon->dhcp6fd, daemon->outpacket.iov_base, save_counter(0), 
+      while (retry_send(sendto(daemon->dhcp6fd, daemon->outpacket.iov_base, 
-		    0, (struct sockaddr *)&from, sizeof(from)) == -1 &&
+			       save_counter(0), 0, (struct sockaddr *)&from, 
-	   retry_send());
+			       sizeof(from))));
     }
 }
 
@@ -246,7 +272,9 @@ void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac, unsi
   neigh.code = 0;
   neigh.reserved = 0;
   neigh.target = *client;
-  
+  /* RFC4443 section-2.3: checksum has to be zero to be calculated */
+  neigh.checksum = 0;
+   
   memset(&addr, 0, sizeof(addr));
 #ifdef HAVE_SOCKADDR_SA_LEN
   addr.sin6_len = sizeof(struct sockaddr_in6);
@@ -708,20 +736,12 @@ static int construct_worker(struct in6_addr *local, int prefix,
 
 void dhcp_construct_contexts(time_t now)
 { 
-  static int active = 0;
   struct dhcp_context *context, *tmp, **up;
   struct cparam param;
   param.newone = 0;
   param.newname = 0;
   param.now = now;
 
-  /* Various calls that we make may end up calling iface_enumerate(), which can then 
-     call us again, We're NOT re-entrant, so ignore a second invokation. */
-  if (active)
-    return;
-
-  active = 1;
-
   for (context = daemon->dhcp6; context; context = context->next)
     if (context->flags & CONTEXT_CONSTRUCTED)
       context->flags |= CONTEXT_GC;
@@ -779,8 +799,6 @@ void dhcp_construct_contexts(time_t now)
 	/* Not doing DHCP, so no lease system, manage alarms for ra only */
 	send_alarm(periodic_ra(now), now);
     }
-
-  active = 0;
 }
 
 #endif

src/dns-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -84,15 +84,15 @@ struct dns_header {
   u16 qdcount,ancount,nscount,arcount;
 };
 
-#define HB3_QR       0x80
+#define HB3_QR       0x80 /* Query */
 #define HB3_OPCODE   0x78
-#define HB3_AA       0x04
+#define HB3_AA       0x04 /* Authoritative Answer */
-#define HB3_TC       0x02
+#define HB3_TC       0x02 /* TrunCated */
-#define HB3_RD       0x01
+#define HB3_RD       0x01 /* Recursion Desired */
 
-#define HB4_RA       0x80
+#define HB4_RA       0x80 /* Recursion Available */
-#define HB4_AD       0x20
+#define HB4_AD       0x20 /* Authenticated Data */
-#define HB4_CD       0x10
+#define HB4_CD       0x10 /* Checking Disabled */
 #define HB4_RCODE    0x0f
 
 #define OPCODE(x)          (((x)->hb3 & HB3_OPCODE) >> 3)
@@ -142,3 +142,11 @@ struct dns_header {
 
 #define ADD_RDLEN(header, pp, plen, len) \
   (!CHECK_LEN(header, pp, plen, len) ? 0 : (((pp) += (len)), 1))
+
+/* Escape character in our presentation format for names.
+   Cannot be '.' or /000 and must be !isprint().
+   Note that escaped chars are stored as
+   <NAME_ESCAPE> <orig-char+1>
+   to ensure that the escaped form of /000 doesn't include /000
+*/
+#define NAME_ESCAPE 1

src/dnsmasq.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -24,12 +24,13 @@ struct daemon *daemon;
 static volatile pid_t pid = 0;
 static volatile int pipewrite;
 
-static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp);
+static int set_dns_listeners(time_t now);
-static void check_dns_listeners(fd_set *set, time_t now);
+static void check_dns_listeners(time_t now);
 static void sig_handler(int sig);
 static void async_event(int pipe, time_t now);
 static void fatal_event(struct event_desc *ev, char *msg);
 static int read_event(int fd, struct event_desc *evp, char **msg);
+static void poll_resolv(int force, int do_reload, time_t now);
 
 int main (int argc, char **argv)
 {
@@ -57,6 +58,9 @@ int main (int argc, char **argv)
   struct dhcp_context *context;
   struct dhcp_relay *relay;
 #endif
+#ifdef HAVE_TFTP
+  int tftp_prefix_missing = 0;
+#endif
 
 #ifdef LOCALEDIR
   setlocale(LC_ALL, "");
@@ -79,28 +83,38 @@ int main (int argc, char **argv)
   sigaction(SIGPIPE, &sigact, NULL);
 
   umask(022); /* known umask, create leases and pid files as 0644 */
-
+ 
+  rand_init(); /* Must precede read_opts() */
+  
   read_opts(argc, argv, compile_opts);
  
   if (daemon->edns_pktsz < PACKETSZ)
     daemon->edns_pktsz = PACKETSZ;
-#ifdef HAVE_DNSSEC
-  /* Enforce min packet big enough for DNSSEC */
-  if (option_bool(OPT_DNSSEC_VALID) && daemon->edns_pktsz < EDNS_PKTSZ)
-    daemon->edns_pktsz = EDNS_PKTSZ;
-#endif
 
   daemon->packet_buff_sz = daemon->edns_pktsz > DNSMASQ_PACKETSZ ? 
     daemon->edns_pktsz : DNSMASQ_PACKETSZ;
   daemon->packet = safe_malloc(daemon->packet_buff_sz);
   
   daemon->addrbuff = safe_malloc(ADDRSTRLEN);
+  if (option_bool(OPT_EXTRALOG))
+    daemon->addrbuff2 = safe_malloc(ADDRSTRLEN);
   
 #ifdef HAVE_DNSSEC
   if (option_bool(OPT_DNSSEC_VALID))
     {
-      daemon->keyname = safe_malloc(MAXDNAME);
+      /* Note that both /000 and '.' are allowed within labels. These get
-      daemon->workspacename = safe_malloc(MAXDNAME);
+	 represented in presentation format using NAME_ESCAPE as an escape
+	 character when in DNSSEC mode. 
+	 In theory, if all the characters in a name were /000 or
+	 '.' or NAME_ESCAPE then all would have to be escaped, so the 
+	 presentation format would be twice as long as the spec.
+
+	 daemon->namebuff was previously allocated by the option-reading
+	 code before we knew if we're in DNSSEC mode, so reallocate here. */
+      free(daemon->namebuff);
+      daemon->namebuff = safe_malloc(MAXDNAME * 2);
+      daemon->keyname = safe_malloc(MAXDNAME * 2);
+      daemon->workspacename = safe_malloc(MAXDNAME * 2);
     }
 #endif
 
@@ -143,15 +157,20 @@ int main (int argc, char **argv)
       reset_option_bool(OPT_CLEVERBIND);
     }
 #endif
+
+#ifndef HAVE_INOTIFY
+  if (daemon->dynamic_dirs)
+    die(_("dhcp-hostsdir, dhcp-optsdir and hostsdir are not supported on this platform"), NULL, EC_BADCONF);
+#endif
   
   if (option_bool(OPT_DNSSEC_VALID))
     {
 #ifdef HAVE_DNSSEC
       if (!daemon->ds)
-	die(_("No trust anchors provided for DNSSEC"), NULL, EC_BADCONF);
+	die(_("no trust anchors provided for DNSSEC"), NULL, EC_BADCONF);
       
       if (daemon->cachesize < CACHESIZ)
-	die(_("Cannot reduce cache size from default when DNSSEC enabled"), NULL, EC_BADCONF);
+	die(_("cannot reduce cache size from default when DNSSEC enabled"), NULL, EC_BADCONF);
 #else 
       die(_("DNSSEC not available: set HAVE_DNSSEC in src/config.h"), NULL, EC_BADCONF);
 #endif
@@ -164,10 +183,10 @@ int main (int argc, char **argv)
 
 #ifdef HAVE_CONNTRACK
   if (option_bool(OPT_CONNTRACK) && (daemon->query_port != 0 || daemon->osport))
-    die (_("Cannot use --conntrack AND --query-port"), NULL, EC_BADCONF); 
+    die (_("cannot use --conntrack AND --query-port"), NULL, EC_BADCONF); 
 #else
   if (option_bool(OPT_CONNTRACK))
-    die(_("Conntrack support not available: set HAVE_CONNTRACK in src/config.h"), NULL, EC_BADCONF);
+    die(_("conntrack support not available: set HAVE_CONNTRACK in src/config.h"), NULL, EC_BADCONF);
 #endif
 
 #ifdef HAVE_SOLARIS_NETWORK
@@ -185,7 +204,10 @@ int main (int argc, char **argv)
     die(_("authoritative DNS not available: set HAVE_AUTH in src/config.h"), NULL, EC_BADCONF);
 #endif
 
-  rand_init();
+#ifndef HAVE_LOOP
+  if (option_bool(OPT_LOOP_DETECT))
+    die(_("loop detection not available: set HAVE_LOOP in src/config.h"), NULL, EC_BADCONF);
+#endif
   
   now = dnsmasq_time();
 
@@ -309,11 +331,19 @@ int main (int argc, char **argv)
   if (daemon->port != 0)
     {
       cache_init();
+
 #ifdef HAVE_DNSSEC
       blockdata_init();
 #endif
     }
-    
+
+#ifdef HAVE_INOTIFY
+  if (daemon->port != 0 || daemon->dhcp || daemon->doing_dhcp6)
+    inotify_dnsmasq_init();
+  else
+    daemon->inotifyfd = -1;
+#endif
+       
   if (option_bool(OPT_DBUS))
 #ifdef HAVE_DBUS
     {
@@ -326,7 +356,7 @@ int main (int argc, char **argv)
 #else
   die(_("DBus not available: set HAVE_DBUS in src/config.h"), NULL, EC_BADCONF);
 #endif
-  
+
   if (daemon->port != 0)
     pre_allocate_sfds();
 
@@ -353,7 +383,7 @@ int main (int argc, char **argv)
 
   if (baduser)
     die(_("unknown user or group: %s"), baduser, EC_BADCONF);
-   
+
   /* implement group defaults, "dip" if available, or group associated with uid */
   if (!daemon->group_set && !gp)
     {
@@ -428,7 +458,7 @@ int main (int argc, char **argv)
 	      char *msg;
 
 	      /* close our copy of write-end */
-	      close(err_pipe[1]);
+	      while (retry_send(close(err_pipe[1])));
 	      
 	      /* check for errors after the fork */
 	      if (read_event(err_pipe[0], &ev, &msg))
@@ -437,7 +467,7 @@ int main (int argc, char **argv)
 	      _exit(EC_GOOD);
 	    } 
 	  
-	  close(err_pipe[0]);
+	  while (retry_send(close(err_pipe[0])));
 
 	  /* NO calls to die() from here on. */
 	  
@@ -489,10 +519,12 @@ int main (int argc, char **argv)
 	    {
 	      if (!read_write(fd, (unsigned char *)daemon->namebuff, strlen(daemon->namebuff), 0))
 		err = 1;
-	      
+	      else 
-	      while (!err && close(fd) == -1)
+		{
-		if (!retry_send())
+		  while (retry_send(close(fd)));
-		  err = 1;
+		  if (errno != 0)
+		    err = 1;
+		}
 	    }
 
 	  if (err)
@@ -611,12 +643,14 @@ int main (int argc, char **argv)
     }
   
 #ifdef HAVE_LINUX_NETWORK
+  free(hdr);
+  free(data);
   if (option_bool(OPT_DEBUG)) 
     prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
 #endif
 
 #ifdef HAVE_TFTP
-      if (option_bool(OPT_TFTP))
+  if (option_bool(OPT_TFTP))
     {
       DIR *dir;
       struct tftp_prefix *p;
@@ -625,20 +659,31 @@ int main (int argc, char **argv)
 	{
 	  if (!((dir = opendir(daemon->tftp_prefix))))
 	    {
-	      send_event(err_pipe[1], EVENT_TFTP_ERR, errno, daemon->tftp_prefix);
+	      tftp_prefix_missing = 1;
-	      _exit(0);
+	      if (!option_bool(OPT_TFTP_NO_FAIL))
+	        {
+	          send_event(err_pipe[1], EVENT_TFTP_ERR, errno, daemon->tftp_prefix);
+	          _exit(0);
+	        }
 	    }
-	  closedir(dir);
+	  else
+	    closedir(dir);
 	}
 
       for (p = daemon->if_prefix; p; p = p->next)
 	{
+	  p->missing = 0;
 	  if (!((dir = opendir(p->prefix))))
-	   {
+	    {
-	     send_event(err_pipe[1], EVENT_TFTP_ERR, errno, p->prefix);
+	      p->missing = 1;
-	     _exit(0);
+	      if (!option_bool(OPT_TFTP_NO_FAIL))
-	   } 
+		{
-	  closedir(dir);
+		  send_event(err_pipe[1], EVENT_TFTP_ERR, errno, p->prefix);
+		  _exit(0);
+		}
+	    }
+	  else
+	    closedir(dir);
 	}
     }
 #endif
@@ -668,9 +713,24 @@ int main (int argc, char **argv)
 #ifdef HAVE_DNSSEC
   if (option_bool(OPT_DNSSEC_VALID))
     {
+      int rc;
+
+      /* Delay creating the timestamp file until here, after we've changed user, so that
+	 it has the correct owner to allow updating the mtime later. 
+	 This means we have to report fatal errors via the pipe. */
+      if ((rc = setup_timestamp()) == -1)
+	{
+	  send_event(err_pipe[1], EVENT_TIME_ERR, errno, daemon->timestamp_file);
+	  _exit(0);
+	}
+      
       my_syslog(LOG_INFO, _("DNSSEC validation enabled"));
+      
       if (option_bool(OPT_DNSSEC_TIME))
 	my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until first cache reload"));
+      
+      if (rc == 1)
+	my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until system time valid"));
     }
 #endif
 
@@ -736,18 +796,22 @@ int main (int argc, char **argv)
 #endif
 
 #ifdef HAVE_TFTP
-	if (option_bool(OPT_TFTP))
+  if (option_bool(OPT_TFTP))
     {
-#ifdef FD_SETSIZE
+      struct tftp_prefix *p;
-      if (FD_SETSIZE < (unsigned)max_fd)
-	max_fd = FD_SETSIZE;
-#endif
 
       my_syslog(MS_TFTP | LOG_INFO, "TFTP %s%s %s", 
 		daemon->tftp_prefix ? _("root is ") : _("enabled"),
 		daemon->tftp_prefix ? daemon->tftp_prefix: "",
 		option_bool(OPT_TFTP_SECURE) ? _("secure mode") : "");
-      
+
+      if (tftp_prefix_missing)
+	my_syslog(MS_TFTP | LOG_WARNING, _("warning: %s inaccessible"), daemon->tftp_prefix);
+
+      for (p = daemon->if_prefix; p; p = p->next)
+	if (p->missing)
+	   my_syslog(MS_TFTP | LOG_WARNING, _("warning: TFTP directory %s inaccessible"), p->prefix);
+
       /* This is a guess, it assumes that for small limits, 
 	 disjoint files might be served, but for large limits, 
 	 a single file will be sent to may clients (the file only needs
@@ -780,89 +844,72 @@ int main (int argc, char **argv)
 
   /* finished start-up - release original process */
   if (err_pipe[1] != -1)
-    close(err_pipe[1]);
+    while (retry_send(close(err_pipe[1])));
   
   if (daemon->port != 0)
     check_servers();
   
   pid = getpid();
   
+#ifdef HAVE_INOTIFY
+  /* Using inotify, have to select a resolv file at startup */
+  poll_resolv(1, 0, now);
+#endif
+  
   while (1)
     {
-      int maxfd = -1;
+      int t, timeout = -1;
-      struct timeval t, *tp = NULL;
-      fd_set rset, wset, eset;
       
-      FD_ZERO(&rset);
+      poll_reset();
-      FD_ZERO(&wset);
-      FD_ZERO(&eset);
       
       /* if we are out of resources, find how long we have to wait
 	 for some to come free, we'll loop around then and restart
 	 listening for queries */
-      if ((t.tv_sec = set_dns_listeners(now, &rset, &maxfd)) != 0)
+      if ((t = set_dns_listeners(now)) != 0)
-	{
+	timeout = t * 1000;
-	  t.tv_usec = 0;
-	  tp = &t;
-	}
 
       /* Whilst polling for the dbus, or doing a tftp transfer, wake every quarter second */
       if (daemon->tftp_trans ||
 	  (option_bool(OPT_DBUS) && !daemon->dbus))
-	{
+	timeout = 250;
-	  t.tv_sec = 0;
+
-	  t.tv_usec = 250000;
-	  tp = &t;
-	}
       /* Wake every second whilst waiting for DAD to complete */
       else if (is_dad_listeners())
-	{
+	timeout = 1000;
-	  t.tv_sec = 1;
-	  t.tv_usec = 0;
-	  tp = &t;
-	}
 
 #ifdef HAVE_DBUS
-      set_dbus_listeners(&maxfd, &rset, &wset, &eset);
+      set_dbus_listeners();
 #endif	
   
 #ifdef HAVE_DHCP
       if (daemon->dhcp || daemon->relay4)
 	{
-	  FD_SET(daemon->dhcpfd, &rset);
+	  poll_listen(daemon->dhcpfd, POLLIN);
-	  bump_maxfd(daemon->dhcpfd, &maxfd);
 	  if (daemon->pxefd != -1)
-	    {
+	    poll_listen(daemon->pxefd, POLLIN);
-	      FD_SET(daemon->pxefd, &rset);
-	      bump_maxfd(daemon->pxefd, &maxfd);
-	    }
 	}
 #endif
 
 #ifdef HAVE_DHCP6
       if (daemon->doing_dhcp6 || daemon->relay6)
-	{
+	poll_listen(daemon->dhcp6fd, POLLIN);
-	  FD_SET(daemon->dhcp6fd, &rset);
+	
-	  bump_maxfd(daemon->dhcp6fd, &maxfd);
-	}
-
       if (daemon->doing_ra)
-	{
+	poll_listen(daemon->icmp6fd, POLLIN); 
-	  FD_SET(daemon->icmp6fd, &rset);
+#endif
-	  bump_maxfd(daemon->icmp6fd, &maxfd); 
+    
-	}
+#ifdef HAVE_INOTIFY
+      if (daemon->inotifyfd != -1)
+	poll_listen(daemon->inotifyfd, POLLIN);
 #endif
 
 #if defined(HAVE_LINUX_NETWORK)
-      FD_SET(daemon->netlinkfd, &rset);
+      poll_listen(daemon->netlinkfd, POLLIN);
-      bump_maxfd(daemon->netlinkfd, &maxfd);
 #elif defined(HAVE_BSD_NETWORK)
-      FD_SET(daemon->routefd, &rset);
+      poll_listen(daemon->routefd, POLLIN);
-      bump_maxfd(daemon->routefd, &maxfd);
 #endif
-
+      
-      FD_SET(piperead, &rset);
+      poll_listen(piperead, POLLIN);
-      bump_maxfd(piperead, &maxfd);
 
 #ifdef HAVE_DHCP
 #  ifdef HAVE_SCRIPT
@@ -873,10 +920,7 @@ int main (int argc, char **argv)
 #    endif
 
       if (!helper_buf_empty())
-	{
+	poll_listen(daemon->helperfd, POLLOUT);
-	  FD_SET(daemon->helperfd, &wset);
-	  bump_maxfd(daemon->helperfd, &maxfd);
-	}
 #  else
       /* need this for other side-effects */
       while (do_script_run(now));
@@ -890,17 +934,14 @@ int main (int argc, char **argv)
    
       /* must do this just before select(), when we know no
 	 more calls to my_syslog() can occur */
-      set_log_writer(&wset, &maxfd);
+      set_log_writer();
+      
+      if (do_poll(timeout) < 0)
+	continue;
       
-      if (select(maxfd+1, &rset, &wset, &eset, tp) < 0)
-	{
-	  /* otherwise undefined after error */
-	  FD_ZERO(&rset); FD_ZERO(&wset); FD_ZERO(&eset);
-	}
-
       now = dnsmasq_time();
 
-      check_log_writer(&wset);
+      check_log_writer(0);
 
       /* prime. */
       enumerate_interfaces(1);
@@ -916,13 +957,20 @@ int main (int argc, char **argv)
 	}
 
 #if defined(HAVE_LINUX_NETWORK)
-      if (FD_ISSET(daemon->netlinkfd, &rset))
+      if (poll_check(daemon->netlinkfd, POLLIN))
-	netlink_multicast(now);
+	netlink_multicast();
 #elif defined(HAVE_BSD_NETWORK)
-      if (FD_ISSET(daemon->routefd, &rset))
+      if (poll_check(daemon->routefd, POLLIN))
-	route_sock(now);
+	route_sock();
 #endif
 
+#ifdef HAVE_INOTIFY
+      if  (daemon->inotifyfd != -1 && poll_check(daemon->inotifyfd, POLLIN) && inotify_check(now))
+	{
+	  if (daemon->port != 0 && !option_bool(OPT_NO_POLL))
+	    poll_resolv(1, 1, now);
+	} 	  
+#else
       /* Check for changes to resolv files once per second max. */
       /* Don't go silent for long periods if the clock goes backwards. */
       if (daemon->last_resolv == 0 || 
@@ -935,8 +983,9 @@ int main (int argc, char **argv)
 	  poll_resolv(0, daemon->last_resolv != 0, now); 	  
 	  daemon->last_resolv = now;
 	}
-      
+#endif
-      if (FD_ISSET(piperead, &rset))
+
+      if (poll_check(piperead, POLLIN))
 	async_event(piperead, now);
       
 #ifdef HAVE_DBUS
@@ -949,34 +998,34 @@ int main (int argc, char **argv)
 	  if (daemon->dbus)
 	    my_syslog(LOG_INFO, _("connected to system DBus"));
 	}
-      check_dbus_listeners(&rset, &wset, &eset);
+      check_dbus_listeners();
 #endif
       
-      check_dns_listeners(&rset, now);
+      check_dns_listeners(now);
 
 #ifdef HAVE_TFTP
-      check_tftp_listeners(&rset, now);
+      check_tftp_listeners(now);
 #endif      
 
 #ifdef HAVE_DHCP
       if (daemon->dhcp || daemon->relay4)
 	{
-	  if (FD_ISSET(daemon->dhcpfd, &rset))
+	  if (poll_check(daemon->dhcpfd, POLLIN))
 	    dhcp_packet(now, 0);
-	  if (daemon->pxefd != -1 && FD_ISSET(daemon->pxefd, &rset))
+	  if (daemon->pxefd != -1 && poll_check(daemon->pxefd, POLLIN))
 	    dhcp_packet(now, 1);
 	}
 
 #ifdef HAVE_DHCP6
-      if ((daemon->doing_dhcp6 || daemon->relay6) && FD_ISSET(daemon->dhcp6fd, &rset))
+      if ((daemon->doing_dhcp6 || daemon->relay6) && poll_check(daemon->dhcp6fd, POLLIN))
 	dhcp6_packet(now);
 
-      if (daemon->doing_ra && FD_ISSET(daemon->icmp6fd, &rset))
+      if (daemon->doing_ra && poll_check(daemon->icmp6fd, POLLIN))
 	icmp6_packet(now);
 #endif
 
 #  ifdef HAVE_SCRIPT
-      if (daemon->helperfd != -1 && FD_ISSET(daemon->helperfd, &wset))
+      if (daemon->helperfd != -1 && poll_check(daemon->helperfd, POLLIN))
 	helper_write();
 #  endif
 #endif
@@ -1037,6 +1086,11 @@ void send_alarm(time_t event, time_t now)
     }
 }
 
+void queue_event(int event)
+{
+  send_event(pipewrite, event, 0, NULL);
+}
+
 void send_event(int fd, int event, int data, char *msg)
 {
   struct event_desc ev;
@@ -1117,6 +1171,9 @@ static void fatal_event(struct event_desc *ev, char *msg)
 
     case EVENT_TFTP_ERR:
       die(_("TFTP directory %s inaccessible: %s"), msg, EC_FILE);
+    
+    case EVENT_TIME_ERR:
+      die(_("cannot create timestamp file %s: %s" ), msg, EC_BADCONF);
     }
 }	
       
@@ -1230,7 +1287,17 @@ static void async_event(int pipe, time_t now)
 	if (daemon->log_file != NULL)
 	  log_reopen(daemon->log_file);
 	break;
-	
+
+      case EVENT_NEWADDR:
+	newaddress(now);
+	break;
+
+      case EVENT_NEWROUTE:
+	resend_query();
+	/* Force re-reading resolv file right now, for luck. */
+	poll_resolv(0, 1, now);
+	break;
+
       case EVENT_TERM:
 	/* Knock all our children on the head. */
 	for (i = 0; i < MAX_PROCS; i++)
@@ -1247,7 +1314,7 @@ static void async_event(int pipe, time_t now)
 	    do {
 	      helper_write();
 	    } while (!helper_buf_empty() || do_script_run(now));
-	    close(daemon->helperfd);
+	    while (retry_send(close(daemon->helperfd)));
 	  }
 #endif
 	
@@ -1263,7 +1330,7 @@ static void async_event(int pipe, time_t now)
       }
 }
 
-void poll_resolv(int force, int do_reload, time_t now)
+static void poll_resolv(int force, int do_reload, time_t now)
 {
   struct resolvc *res, *latest;
   struct stat statbuf;
@@ -1346,6 +1413,9 @@ void clear_cache_and_reload(time_t now)
       if (option_bool(OPT_ETHERS))
 	dhcp_read_ethers();
       reread_dhcp();
+#ifdef HAVE_INOTIFY
+      set_dynamic_inotify(AH_DHCP_HST | AH_DHCP_OPT, 0, NULL, 0);
+#endif
       dhcp_update_configs(daemon->dhcp_conf);
       lease_update_from_configs(); 
       lease_update_file(now); 
@@ -1360,7 +1430,7 @@ void clear_cache_and_reload(time_t now)
 #endif
 }
 
-static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp)
+static int set_dns_listeners(time_t now)
 {
   struct serverfd *serverfdp;
   struct listener *listener;
@@ -1372,8 +1442,7 @@ static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp)
   for (transfer = daemon->tftp_trans; transfer; transfer = transfer->next)
     {
       tftp++;
-      FD_SET(transfer->sockfd, set);
+      poll_listen(transfer->sockfd, POLLIN);
-      bump_maxfd(transfer->sockfd, maxfdp);
     }
 #endif
   
@@ -1382,45 +1451,32 @@ static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp)
     get_new_frec(now, &wait, 0);
   
   for (serverfdp = daemon->sfds; serverfdp; serverfdp = serverfdp->next)
-    {
+    poll_listen(serverfdp->fd, POLLIN);
-      FD_SET(serverfdp->fd, set);
+    
-      bump_maxfd(serverfdp->fd, maxfdp);
-    }
-
   if (daemon->port != 0 && !daemon->osport)
     for (i = 0; i < RANDOM_SOCKS; i++)
       if (daemon->randomsocks[i].refcount != 0)
-	{
+	poll_listen(daemon->randomsocks[i].fd, POLLIN);
-	  FD_SET(daemon->randomsocks[i].fd, set);
+	  
-	  bump_maxfd(daemon->randomsocks[i].fd, maxfdp);
-	}
-  
   for (listener = daemon->listeners; listener; listener = listener->next)
     {
       /* only listen for queries if we have resources */
       if (listener->fd != -1 && wait == 0)
-	{
+	poll_listen(listener->fd, POLLIN);
-	  FD_SET(listener->fd, set);
+	
-	  bump_maxfd(listener->fd, maxfdp);
-	}
-
       /* death of a child goes through the select loop, so
 	 we don't need to explicitly arrange to wake up here */
       if  (listener->tcpfd != -1)
 	for (i = 0; i < MAX_PROCS; i++)
 	  if (daemon->tcp_pids[i] == 0)
 	    {
-	      FD_SET(listener->tcpfd, set);
+	      poll_listen(listener->tcpfd, POLLIN);
-	      bump_maxfd(listener->tcpfd, maxfdp);
 	      break;
 	    }
 
 #ifdef HAVE_TFTP
       if (tftp <= daemon->tftp_max && listener->tftpfd != -1)
-	{
+	poll_listen(listener->tftpfd, POLLIN);
-	  FD_SET(listener->tftpfd, set);
-	  bump_maxfd(listener->tftpfd, maxfdp);
-	}
 #endif
 
     }
@@ -1428,33 +1484,33 @@ static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp)
   return wait;
 }
 
-static void check_dns_listeners(fd_set *set, time_t now)
+static void check_dns_listeners(time_t now)
 {
   struct serverfd *serverfdp;
   struct listener *listener;
   int i;
 
   for (serverfdp = daemon->sfds; serverfdp; serverfdp = serverfdp->next)
-    if (FD_ISSET(serverfdp->fd, set))
+    if (poll_check(serverfdp->fd, POLLIN))
       reply_query(serverfdp->fd, serverfdp->source_addr.sa.sa_family, now);
   
   if (daemon->port != 0 && !daemon->osport)
     for (i = 0; i < RANDOM_SOCKS; i++)
       if (daemon->randomsocks[i].refcount != 0 && 
-	  FD_ISSET(daemon->randomsocks[i].fd, set))
+	  poll_check(daemon->randomsocks[i].fd, POLLIN))
 	reply_query(daemon->randomsocks[i].fd, daemon->randomsocks[i].family, now);
   
   for (listener = daemon->listeners; listener; listener = listener->next)
     {
-      if (listener->fd != -1 && FD_ISSET(listener->fd, set))
+      if (listener->fd != -1 && poll_check(listener->fd, POLLIN))
 	receive_query(listener, now); 
       
 #ifdef HAVE_TFTP     
-      if (listener->tftpfd != -1 && FD_ISSET(listener->tftpfd, set))
+      if (listener->tftpfd != -1 && poll_check(listener->tftpfd, POLLIN))
 	tftp_request(listener, now);
 #endif
 
-      if (listener->tcpfd != -1 && FD_ISSET(listener->tcpfd, set))
+      if (listener->tcpfd != -1 && poll_check(listener->tcpfd, POLLIN))
 	{
 	  int confd, client_ok = 1;
 	  struct irec *iface = NULL;
@@ -1469,7 +1525,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 	  
 	  if (getsockname(confd, (struct sockaddr *)&tcp_addr, &tcp_len) == -1)
 	    {
-	      close(confd);
+	      while (retry_send(close(confd)));
 	      continue;
 	    }
 	  
@@ -1534,7 +1590,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 	  if (!client_ok)
 	    {
 	      shutdown(confd, SHUT_RDWR);
-	      close(confd);
+	      while (retry_send(close(confd)));
 	    }
 #ifndef NO_FORK
 	  else if (!option_bool(OPT_DEBUG) && (p = fork()) != 0)
@@ -1549,7 +1605,10 @@ static void check_dns_listeners(fd_set *set, time_t now)
 			break;
 		      }
 		}
-	      close(confd);
+	      while (retry_send(close(confd)));
+
+	      /* The child can use up to TCP_MAX_QUERIES ids, so skip that many. */
+	      daemon->log_id += TCP_MAX_QUERIES;
 	    }
 #endif
 	  else
@@ -1591,7 +1650,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 	      buff = tcp_request(confd, now, &tcp_addr, netmask, auth_dns);
 	       
 	      shutdown(confd, SHUT_RDWR);
-	      close(confd);
+	      while (retry_send(close(confd)));
 	      
 	      if (buff)
 		free(buff);
@@ -1600,7 +1659,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 		if (s->tcpfd != -1)
 		  {
 		    shutdown(s->tcpfd, SHUT_RDWR);
-		    close(s->tcpfd);
+		    while (retry_send(close(s->tcpfd)));
 		  }
 #ifndef NO_FORK		   
 	      if (!option_bool(OPT_DEBUG))
@@ -1642,14 +1701,22 @@ int icmp_ping(struct in_addr addr)
      better not use any resources our caller has in use...)
      but we remain deaf to signals or further DHCP packets. */
 
-  int fd;
+  /* There can be a problem using dnsmasq_time() to end the loop, since
+     it's not monotonic, and can go backwards if the system clock is
+     tweaked, leading to the code getting stuck in this loop and
+     ignoring DHCP requests. To fix this, we check to see if select returned
+     as a result of a timeout rather than a socket becoming available. We
+     only allow this to happen as many times as it takes to get to the wait time
+     in quarter-second chunks. This provides a fallback way to end loop. */ 
+
+  int fd, rc;
   struct sockaddr_in saddr;
   struct { 
     struct ip ip;
     struct icmp icmp;
   } packet;
   unsigned short id = rand16();
-  unsigned int i, j;
+  unsigned int i, j, timeout_count;
   int gotreply = 0;
   time_t start, now;
 
@@ -1678,57 +1745,47 @@ int icmp_ping(struct in_addr addr)
     j = (j & 0xffff) + (j >> 16);  
   packet.icmp.icmp_cksum = (j == 0xffff) ? j : ~j;
   
-  while (sendto(fd, (char *)&packet.icmp, sizeof(struct icmp), 0, 
+  while (retry_send(sendto(fd, (char *)&packet.icmp, sizeof(struct icmp), 0, 
-		(struct sockaddr *)&saddr, sizeof(saddr)) == -1 &&
+			   (struct sockaddr *)&saddr, sizeof(saddr))));
-	 retry_send());
   
-  for (now = start = dnsmasq_time(); 
+  for (now = start = dnsmasq_time(), timeout_count = 0; 
-       difftime(now, start) < (float)PING_WAIT;)
+       (difftime(now, start) < (float)PING_WAIT) && (timeout_count < PING_WAIT * 4);)
     {
-      struct timeval tv;
-      fd_set rset, wset;
       struct sockaddr_in faddr;
-      int maxfd = fd; 
       socklen_t len = sizeof(faddr);
       
-      tv.tv_usec = 250000;
+      poll_reset();
-      tv.tv_sec = 0; 
+      poll_listen(fd, POLLIN);
-      
+      set_dns_listeners(now);
-      FD_ZERO(&rset);
+      set_log_writer();
-      FD_ZERO(&wset);
-      FD_SET(fd, &rset);
-      set_dns_listeners(now, &rset, &maxfd);
-      set_log_writer(&wset, &maxfd);
       
 #ifdef HAVE_DHCP6
       if (daemon->doing_ra)
-	{
+	poll_listen(daemon->icmp6fd, POLLIN); 
-	  FD_SET(daemon->icmp6fd, &rset);
-	  bump_maxfd(daemon->icmp6fd, &maxfd); 
-	}
 #endif
       
-      if (select(maxfd+1, &rset, &wset, NULL, &tv) < 0)
+      rc = do_poll(250);
-	{
+      
-	  FD_ZERO(&rset);
+      if (rc < 0)
-	  FD_ZERO(&wset);
+	continue;
-	}
+      else if (rc == 0)
+	timeout_count++;
 
       now = dnsmasq_time();
 
-      check_log_writer(&wset);
+      check_log_writer(0);
-      check_dns_listeners(&rset, now);
+      check_dns_listeners(now);
 
 #ifdef HAVE_DHCP6
-      if (daemon->doing_ra && FD_ISSET(daemon->icmp6fd, &rset))
+      if (daemon->doing_ra && poll_check(daemon->icmp6fd, POLLIN))
 	icmp6_packet(now);
 #endif
       
 #ifdef HAVE_TFTP
-      check_tftp_listeners(&rset, now);
+      check_tftp_listeners(now);
 #endif
 
-      if (FD_ISSET(fd, &rset) &&
+      if (poll_check(fd, POLLIN) &&
 	  recvfrom(fd, &packet, sizeof(packet), 0,
 		   (struct sockaddr *)&faddr, &len) == sizeof(packet) &&
 	  saddr.sin_addr.s_addr == faddr.sin_addr.s_addr &&
@@ -1742,7 +1799,7 @@ int icmp_ping(struct in_addr addr)
     }
   
 #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_SOLARIS_NETWORK)
-  close(fd);
+  while (retry_send(close(fd)));
 #else
   opt = 1;
   setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt));

src/dnsmasq.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
  
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -14,7 +14,7 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#define COPYRIGHT "Copyright (c) 2000-2014 Simon Kelley" 
+#define COPYRIGHT "Copyright (c) 2000-2015 Simon Kelley" 
 
 #ifndef NO_LARGEFILE
 /* Ensure we can use files >2GB (log files may grow this big) */
@@ -82,7 +82,7 @@ typedef unsigned long long u64;
 #if defined(HAVE_SOLARIS_NETWORK)
 #  include <sys/sockio.h>
 #endif
-#include <sys/select.h>
+#include <sys/poll.h>
 #include <sys/wait.h>
 #include <sys/time.h>
 #include <sys/un.h>
@@ -165,6 +165,9 @@ struct event_desc {
 #define EVENT_LUA_ERR   19
 #define EVENT_TFTP_ERR  20
 #define EVENT_INIT      21
+#define EVENT_NEWADDR   22
+#define EVENT_NEWROUTE  23
+#define EVENT_TIME_ERR  24
 
 /* Exit codes. */
 #define EC_GOOD        0
@@ -235,7 +238,10 @@ struct event_desc {
 #define OPT_DNSSEC_DEBUG   47
 #define OPT_DNSSEC_NO_SIGN 48 
 #define OPT_LOCAL_SERVICE  49
-#define OPT_LAST           50
+#define OPT_LOOP_DETECT    50
+#define OPT_EXTRALOG       51
+#define OPT_TFTP_NO_FAIL   52
+#define OPT_LAST           53
 
 /* extra flags for my_syslog, we use a couple of facilities since they are known 
    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
@@ -315,6 +321,7 @@ struct ds_config {
 
 #define ADDRLIST_LITERAL 1
 #define ADDRLIST_IPV6    2
+#define ADDRLIST_REVONLY 4
 
 struct addrlist {
   struct all_addr addr;
@@ -437,6 +444,8 @@ struct crec {
 #define F_SECSTAT   (1u<<24)
 #define F_NO_RR     (1u<<25)
 #define F_IPSET     (1u<<26)
+#define F_NSIGMATCH (1u<<27)
+#define F_NOEXTRA   (1u<<28)
 
 /* Values of uid in crecs with F_CONFIG bit set. */
 #define SRC_INTERFACE 0
@@ -476,6 +485,7 @@ union mysockaddr {
 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 #define SERV_FROM_FILE      4096  /* read from --servers-file */
+#define SERV_LOOP           8192  /* server causes forwarding loop */
 
 struct serverfd {
   int fd;
@@ -494,8 +504,11 @@ struct server {
   char interface[IF_NAMESIZE+1];
   struct serverfd *sfd; 
   char *domain; /* set if this server only handles a domain. */ 
-  int flags, tcpfd;
+  int flags, tcpfd, edns_pktsz;
   unsigned int queries, failed_queries;
+#ifdef HAVE_LOOP
+  u32 uid;
+#endif
   struct server *next; 
 };
 
@@ -533,15 +546,26 @@ struct resolvc {
   int is_default, logged;
   time_t mtime;
   char *name;
+#ifdef HAVE_INOTIFY
+  int wd; /* inotify watch descriptor */
+  char *file; /* pointer to file part if path */
+#endif
 };
 
-/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
+/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/
 #define AH_DIR      1
 #define AH_INACTIVE 2
+#define AH_WD_DONE  4
+#define AH_HOSTS    8
+#define AH_DHCP_HST 16
+#define AH_DHCP_OPT 32
 struct hostsfile {
   struct hostsfile *next;
   int flags;
   char *fname;
+#ifdef HAVE_INOTIFY
+  int wd; /* inotify watch descriptor */
+#endif
   unsigned int index; /* matches to cache entries for logging */
 };
 
@@ -556,8 +580,10 @@ struct hostsfile {
 #define STAT_SECURE_WILDCARD    7
 #define STAT_NO_SIG             8
 #define STAT_NO_DS              9
-#define STAT_NEED_DS_NEG       10
+#define STAT_NO_NS             10
-#define STAT_CHASE_CNAME       11
+#define STAT_NEED_DS_NEG       11
+#define STAT_CHASE_CNAME       12
+#define STAT_INSECURE_DS       13
 
 #define FREC_NOREBIND           1
 #define FREC_CHECKING_DISABLED  2
@@ -568,6 +594,7 @@ struct hostsfile {
 #define FREC_DO_QUESTION       64
 #define FREC_ADDED_PHEADER    128
 #define FREC_CHECK_NOSIGN     256
+#define FREC_TEST_PKTSZ       512
 
 #ifdef HAVE_DNSSEC
 #define HASH_SIZE 20 /* SHA-1 digest size */
@@ -585,13 +612,15 @@ struct frec {
 #endif
   unsigned int iface;
   unsigned short orig_id, new_id;
-  int fd, forwardall, flags;
+  int log_id, fd, forwardall, flags;
   time_t time;
   unsigned char *hash[HASH_SIZE];
 #ifdef HAVE_DNSSEC 
   int class, work_counter;
   struct blockdata *stash; /* Saved reply, whilst we validate */
-  size_t stash_len;
+  struct blockdata *orig_domain; /* domain of original query, whilst
+				    we're seeing is if in unsigned domain */
+  size_t stash_len, name_start, name_len;
   struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
   struct frec *blocking_query; /* Query which is blocking us. */
 #endif
@@ -639,6 +668,8 @@ struct dhcp_lease {
   unsigned char *extradata;
   unsigned int extradata_len, extradata_size;
   int last_interface;
+  int new_interface;     /* save possible originated interface */
+  int new_prefixlen;     /* and its prefix length */
 #ifdef HAVE_DHCP6
   struct in6_addr addr6;
   int iaid;
@@ -837,6 +868,7 @@ struct dhcp_context {
 #define CONTEXT_USED           (1u<<15)
 #define CONTEXT_OLD            (1u<<16)
 #define CONTEXT_V6             (1u<<17)
+#define CONTEXT_RA_OFF_LINK    (1u<<18)
 
 struct ping_result {
   struct in_addr addr;
@@ -873,6 +905,7 @@ struct addr_list {
 struct tftp_prefix {
   char *interface;
   char *prefix;
+  int missing;
   struct tftp_prefix *next;
 };
 
@@ -915,7 +948,7 @@ extern struct daemon {
   char *runfile; 
   char *lease_change_command;
   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
-  struct bogus_addr *bogus_addr;
+  struct bogus_addr *bogus_addr, *ignore_addr;
   struct server *servers;
   struct ipsets *ipsets;
   int log_fac; /* log facility */
@@ -923,7 +956,7 @@ extern struct daemon {
   int max_logs;  /* queue limit */
   int cachesize, ftabsize;
   int port, query_port, min_port;
-  unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
+  unsigned long local_ttl, neg_ttl, max_ttl, min_cache_ttl, max_cache_ttl, auth_ttl;
   struct hostsfile *addn_hosts;
   struct dhcp_context *dhcp, *dhcp6;
   struct ra_interface *ra_interfaces;
@@ -941,7 +974,7 @@ extern struct daemon {
   int doing_ra, doing_dhcp6;
   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names; 
   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
-  struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
+  struct hostsfile *dhcp_hosts_file, *dhcp_opts_file, *dynamic_dirs;
   int dhcp_max, tftp_max;
   int dhcp_server_port, dhcp_client_port;
   int start_tftp_port, end_tftp_port; 
@@ -959,6 +992,7 @@ extern struct daemon {
 #endif
 #ifdef HAVE_DNSSEC
   struct ds_config *ds;
+  char *timestamp_file;
 #endif
 
   /* globally used stuff for DNS */
@@ -984,9 +1018,14 @@ extern struct daemon {
   struct randfd randomsocks[RANDOM_SOCKS];
   int v6pktinfo; 
   struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */
+  int log_id, log_display_id; /* ids of transactions for logging */
+  union mysockaddr *log_source_addr;
 
   /* DHCP state */
   int dhcpfd, helperfd, pxefd; 
+#ifdef HAVE_INOTIFY
+  int inotifyfd;
+#endif
 #if defined(HAVE_LINUX_NETWORK)
   int netlinkfd;
 #elif defined(HAVE_BSD_NETWORK)
@@ -1015,6 +1054,7 @@ extern struct daemon {
 
   /* utility string buffer, hold max sized IP address as string */
   char *addrbuff;
+  char *addrbuff2; /* only allocated when OPT_EXTRALOG */
 
 } *daemon;
 
@@ -1041,6 +1081,8 @@ int cache_make_stat(struct txt_record *t);
 char *cache_get_name(struct crec *crecp);
 char *cache_get_cname_target(struct crec *crecp);
 struct crec *cache_enumerate(int init);
+int read_hostsfile(char *filename, unsigned int index, int cache_size, 
+		   struct crec **rhash, int hashsz);
 
 /* blockdata.c */
 #ifdef HAVE_DNSSEC
@@ -1078,6 +1120,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 		      time_t now, int *ad_reqd, int *do_bit);
 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name, 
 			     struct bogus_addr *addr, time_t now);
+int check_for_ignored_address(struct dns_header *header, size_t qlen, struct bogus_addr *baddr);
 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 				 size_t *len, unsigned char **p, int *is_sign);
 int check_for_local_domain(char *name, time_t now);
@@ -1107,18 +1150,20 @@ int in_zone(struct auth_zone *zone, char *name, char **cut);
 #endif
 
 /* dnssec.c */
-size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr);
+size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr, int edns_pktsz);
 int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class);
 int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
-int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, int *neganswer);
+int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, int *neganswer, int *nons);
 int dnssec_chase_cname(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname);
 int dnskey_keytag(int alg, int flags, unsigned char *rdata, int rdlen);
 size_t filter_rrsigs(struct dns_header *header, size_t plen);
 unsigned char* hash_questions(struct dns_header *header, size_t plen, char *name);
+int setup_timestamp(void);
 
 /* util.c */
 void rand_init(void);
 unsigned short rand16(void);
+u32 rand32(void);
 u64 rand64(void);
 int legal_hostname(char *c);
 char *canonicalise(char *s, int *nomem);
@@ -1130,13 +1175,14 @@ int sa_len(union mysockaddr *addr);
 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
 int hostname_isequal(const char *a, const char *b);
 time_t dnsmasq_time(void);
+int netmask_length(struct in_addr mask);
 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 #ifdef HAVE_IPV6
 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
 u64 addr6part(struct in6_addr *addr);
 void setaddr6part(struct in6_addr *addr, u64 host);
 #endif
-int retry_send(void);
+int retry_send(ssize_t rc);
 void prettyprint_time(char *buf, unsigned int t);
 int prettyprint_addr(union mysockaddr *addr, char *buf);
 int parse_hex(char *in, unsigned char *out, int maxlen, 
@@ -1145,18 +1191,18 @@ int memcmp_masked(unsigned char *a, unsigned char *b, int len,
 		  unsigned int mask);
 int expand_buf(struct iovec *iov, size_t size);
 char *print_mac(char *buff, unsigned char *mac, int len);
-void bump_maxfd(int fd, int *max);
 int read_write(int fd, unsigned char *packet, int size, int rw);
 
 int wildcard_match(const char* wildcard, const char* match);
+int wildcard_matchn(const char* wildcard, const char* match, int num);
 
 /* log.c */
 void die(char *message, char *arg1, int exit_code);
 int log_start(struct passwd *ent_pw, int errfd);
 int log_reopen(char *log_file);
 void my_syslog(int priority, const char *format, ...);
-void set_log_writer(fd_set *set, int *maxfdp);
+void set_log_writer(void);
-void check_log_writer(fd_set *set);
+void check_log_writer(int force);
 void flush_log(void);
 
 /* option.c */
@@ -1170,6 +1216,7 @@ void reset_option_bool(unsigned int opt);
 struct hostsfile *expand_filelist(struct hostsfile *list);
 char *parse_server(char *arg, union mysockaddr *addr, 
 		   union mysockaddr *source_addr, char *interface, int *flags);
+int option_read_dynfile(char *file, int flags);
 
 /* forward.c */
 void reply_query(int fd, int family, time_t now);
@@ -1181,6 +1228,9 @@ struct frec *get_new_frec(time_t now, int *wait, int force);
 int send_from(int fd, int nowild, char *packet, size_t len, 
 	       union mysockaddr *to, struct all_addr *source,
 	       unsigned int iface);
+void resend_query();
+struct randfd *allocate_rfd(int family);
+void free_rfd(struct randfd *rfd);
 
 /* network.c */
 int indextoname(int fd, int index, char *name);
@@ -1255,9 +1305,10 @@ void lease_update_slaac(time_t now);
 void lease_set_iaid(struct dhcp_lease *lease, int iaid);
 void lease_make_duid(time_t now);
 #endif
-void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
+void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr,
-		      unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
+		      const unsigned char *clid, int hw_len, int hw_type,
-void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
+		      int clid_len, time_t now, int force);
+void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain);
 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,  
@@ -1288,15 +1339,15 @@ unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
 int make_icmp_sock(void);
 int icmp_ping(struct in_addr addr);
 #endif
+void queue_event(int event);
 void send_alarm(time_t event, time_t now);
 void send_event(int fd, int event, int data, char *msg);
 void clear_cache_and_reload(time_t now);
-void poll_resolv(int force, int do_reload, time_t now);
 
 /* netlink.c */
 #ifdef HAVE_LINUX_NETWORK
 void netlink_init(void);
-void netlink_multicast(time_t now);
+void netlink_multicast(void);
 #endif
 
 /* bpf.c */
@@ -1305,7 +1356,7 @@ void init_bpf(void);
 void send_via_bpf(struct dhcp_packet *mess, size_t len,
 		  struct in_addr iface_addr, struct ifreq *ifr);
 void route_init(void);
-void route_sock(time_t now);
+void route_sock(void);
 #endif
 
 /* bpf.c or netlink.c */
@@ -1314,8 +1365,8 @@ int iface_enumerate(int family, void *parm, int (callback)());
 /* dbus.c */
 #ifdef HAVE_DBUS
 char *dbus_init(void);
-void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
+void check_dbus_listeners(void);
-void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
+void set_dbus_listeners(void);
 #  ifdef HAVE_DHCP
 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
 #  endif
@@ -1342,7 +1393,7 @@ int helper_buf_empty(void);
 /* tftp.c */
 #ifdef HAVE_TFTP
 void tftp_request(struct listener *listen, time_t now);
-void check_tftp_listeners(fd_set *rset, time_t now);
+void check_tftp_listeners(time_t now);
 int do_tftp_script_run(void);
 #endif
 
@@ -1446,3 +1497,23 @@ void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
 #endif
+
+/* loop.c */
+#ifdef HAVE_LOOP
+void loop_send_probes();
+int detect_loop(char *query, int type);
+#endif
+
+/* inotify.c */
+#ifdef HAVE_INOTIFY
+void inotify_dnsmasq_init();
+int inotify_check(time_t now);
+void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz);
+#endif
+
+/* poll.c */
+void poll_reset(void);
+int poll_check(int fd, short event);
+void poll_listen(int fd, short event);
+int do_poll(int timeout);
+

src/dnssec.c

@@ -1,5 +1,5 @@
 /* dnssec.c is Copyright (c) 2012 Giovanni Bajo <rasky@develer.com>
-           and Copyright (c) 2012-2014 Simon Kelley
+           and Copyright (c) 2012-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -26,7 +26,15 @@
 #  include <nettle/ecc-curve.h>
 #endif
 #include <nettle/nettle-meta.h>
-#include <gmp.h>
+#include <nettle/bignum.h>
+
+/* Nettle-3.0 moved to a new API for DSA. We use a name that's defined in the new API
+   to detect Nettle-3, and invoke the backwards compatibility mode. */
+#ifdef dsa_params_init
+#include <nettle/dsa-compat.h>
+#endif
+
+#include <utime.h>
 
 #define SERIAL_UNDEF  -100
 #define SERIAL_EQ        0
@@ -120,8 +128,8 @@ static int hash_init(const struct nettle_hash *hash, void **ctxp, unsigned char
   return 1;
 }
   
-static int rsa_verify(struct blockdata *key_data, unsigned int key_len, unsigned char *sig, size_t sig_len,
+static int dnsmasq_rsa_verify(struct blockdata *key_data, unsigned int key_len, unsigned char *sig, size_t sig_len,
-		      unsigned char *digest, int algo)
+			      unsigned char *digest, int algo)
 {
   unsigned char *p;
   size_t exp_len;
@@ -172,8 +180,8 @@ static int rsa_verify(struct blockdata *key_data, unsigned int key_len, unsigned
   return 0;
 }  
 
-static int dsa_verify(struct blockdata *key_data, unsigned int key_len, unsigned char *sig, size_t sig_len,
+static int dnsmasq_dsa_verify(struct blockdata *key_data, unsigned int key_len, unsigned char *sig, size_t sig_len,
-		      unsigned char *digest, int algo)
+			      unsigned char *digest, int algo)
 {
   unsigned char *p;
   unsigned int t;
@@ -268,7 +276,7 @@ static int dnsmasq_ecdsa_verify(struct blockdata *key_data, unsigned int key_len
     }
   
   if (sig_len != 2*t || key_len != 2*t ||
-      (p = blockdata_retrieve(key_data, key_len, NULL)))
+      !(p = blockdata_retrieve(key_data, key_len, NULL)))
     return 0;
   
   mpz_import(x, t , 1, 1, 0, 0, p);
@@ -292,10 +300,10 @@ static int verify(struct blockdata *key_data, unsigned int key_len, unsigned cha
   switch (algo)
     {
     case 1: case 5: case 7: case 8: case 10:
-      return rsa_verify(key_data, key_len, sig, sig_len, digest, algo);
+      return dnsmasq_rsa_verify(key_data, key_len, sig, sig_len, digest, algo);
       
     case 3: case 6: 
-      return dsa_verify(key_data, key_len, sig, sig_len, digest, algo);
+      return dnsmasq_dsa_verify(key_data, key_len, sig, sig_len, digest, algo);
  
 #ifndef NO_NETTLE_ECC   
     case 13: case 14:
@@ -313,10 +321,18 @@ static int verify(struct blockdata *key_data, unsigned int key_len, unsigned cha
    thus generating names in canonical form.
    Calling to_wire followed by from_wire is almost an identity,
    except that the UC remains mapped to LC. 
+
+   Note that both /000 and '.' are allowed within labels. These get
+   represented in presentation format using NAME_ESCAPE as an escape
+   character. In theory, if all the characters in a name were /000 or
+   '.' or NAME_ESCAPE then all would have to be escaped, so the 
+   presentation format would be twice as long as the spec (1024). 
+   The buffers are all delcared as 2049 (allowing for the trailing zero) 
+   for this reason.
 */
 static int to_wire(char *name)
 {
-  unsigned char *l, *p, term;
+  unsigned char *l, *p, *q, term;
   int len;
 
   for (l = (unsigned char*)name; *l != 0; l = p)
@@ -324,7 +340,12 @@ static int to_wire(char *name)
       for (p = l; *p != '.' && *p != 0; p++)
 	if (*p >= 'A' && *p <= 'Z')
 	  *p = *p - 'A' + 'a';
-      
+	else if (*p == NAME_ESCAPE)
+	  {
+	    for (q = p; *q; q++)
+	      *q = *(q+1);
+	    (*p)--;
+	  }
       term = *p;
       
       if ((len = p - l) != 0)
@@ -343,13 +364,24 @@ static int to_wire(char *name)
 /* Note: no compression  allowed in input. */
 static void from_wire(char *name)
 {
-  unsigned char *l;
+  unsigned char *l, *p, *last;
   int len;
-
+  
+  for (last = (unsigned char *)name; *last != 0; last += *last+1);
+  
   for (l = (unsigned char *)name; *l != 0; l += len+1)
     {
       len = *l;
       memmove(l, l+1, len);
+      for (p = l; p < l + len; p++)
+	if (*p == '.' || *p == 0 || *p == NAME_ESCAPE)
+	  {
+	    memmove(p+1, p, 1 + last - p);
+	    len++;
+	    *p++ = NAME_ESCAPE; 
+	    (*p)++;
+	  }
+	
       l[len] = '.';
     }
 
@@ -387,17 +419,90 @@ static int serial_compare_32(unsigned long s1, unsigned long s2)
   return SERIAL_UNDEF;
 }
 
+/* Called at startup. If the timestamp file is configured and exists, put its mtime on
+   timestamp_time. If it doesn't exist, create it, and set the mtime to 1-1-2015.
+   return -1 -> Cannot create file.
+           0 -> not using timestamp, or timestamp exists and is in past.
+           1 -> timestamp exists and is in future.
+*/
+
+static time_t timestamp_time;
+static int back_to_the_future;
+
+int setup_timestamp(void)
+{
+  struct stat statbuf;
+  
+  back_to_the_future = 0;
+  
+  if (!daemon->timestamp_file)
+    return 0;
+  
+  if (stat(daemon->timestamp_file, &statbuf) != -1)
+    {
+      timestamp_time = statbuf.st_mtime;
+    check_and_exit:
+      if (difftime(timestamp_time, time(0)) <=  0)
+	{
+	  /* time already OK, update timestamp, and do key checking from the start. */
+	  if (utime(daemon->timestamp_file, NULL) == -1)
+	    my_syslog(LOG_ERR, _("failed to update mtime on %s: %s"), daemon->timestamp_file, strerror(errno));
+	  back_to_the_future = 1;
+	  return 0;
+	}
+      return 1;
+    }
+  
+  if (errno == ENOENT)
+    {
+      /* NB. for explanation of O_EXCL flag, see comment on pidfile in dnsmasq.c */ 
+      int fd = open(daemon->timestamp_file, O_WRONLY | O_CREAT | O_NONBLOCK | O_EXCL, 0666);
+      if (fd != -1)
+	{
+	  struct utimbuf timbuf;
+
+	  close(fd);
+	  
+	  timestamp_time = timbuf.actime = timbuf.modtime = 1420070400; /* 1-1-2015 */
+	  if (utime(daemon->timestamp_file, &timbuf) == 0)
+	    goto check_and_exit;
+	}
+    }
+
+  return -1;
+}
+
 /* Check whether today/now is between date_start and date_end */
 static int check_date_range(unsigned long date_start, unsigned long date_end)
 {
-  unsigned long curtime;
+  unsigned long curtime = time(0);
-
+ 
   /* Checking timestamps may be temporarily disabled */
-  if (option_bool(OPT_DNSSEC_TIME))
+    
+  /* If the current time if _before_ the timestamp
+     on our persistent timestamp file, then assume the
+     time if not yet correct, and don't check the
+     key timestamps. As soon as the current time is
+     later then the timestamp, update the timestamp
+     and start checking keys */
+  if (daemon->timestamp_file)
+    {
+      if (back_to_the_future == 0 && difftime(timestamp_time, curtime) <= 0)
+	{
+	  if (utime(daemon->timestamp_file, NULL) != 0)
+	    my_syslog(LOG_ERR, _("failed to update mtime on %s: %s"), daemon->timestamp_file, strerror(errno));
+	  
+	  back_to_the_future = 1;	
+	  set_option_bool(OPT_DNSSEC_TIME);
+	  queue_event(EVENT_RELOAD); /* purge cache */
+	} 
+
+      if (back_to_the_future == 0)
+	return 1;
+    }
+  else if (option_bool(OPT_DNSSEC_TIME))
     return 1;
   
-  curtime = time(0);
-  
   /* We must explicitly check against wanted values, because of SERIAL_UNDEF */
   return serial_compare_32(curtime, date_start) == SERIAL_GT
     && serial_compare_32(curtime, date_end) == SERIAL_LT;
@@ -449,16 +554,27 @@ static u16 *get_desc(int type)
 
 /* Return bytes of canonicalised rdata, when the return value is zero, the remaining 
    data, pointed to by *p, should be used raw. */
-static int get_rdata(struct dns_header *header, size_t plen, unsigned char *end, char *buff, 
+static int get_rdata(struct dns_header *header, size_t plen, unsigned char *end, char *buff, int bufflen,
 		     unsigned char **p, u16 **desc)
 {
   int d = **desc;
   
-  (*desc)++;
-  
   /* No more data needs mangling */
   if (d == (u16)-1)
-    return 0;
+    {
+      /* If there's more data than we have space for, just return what fits,
+	 we'll get called again for more chunks */
+      if (end - *p > bufflen)
+	{
+	  memcpy(buff, *p, bufflen);
+	  *p += bufflen;
+	  return bufflen;
+	}
+      
+      return 0;
+    }
+ 
+  (*desc)++;
   
   if (d == 0 && extract_name(header, plen, p, buff, 1, 0))
     /* domain-name, canonicalise */
@@ -553,7 +669,7 @@ static void sort_rrset(struct dns_header *header, size_t plen, u16 *rr_desc, int
 	      if (left1 != 0)
 		memmove(buff1, buff1 + len1 - left1, left1);
 	      
-	      if ((len1 = get_rdata(header, plen, end1, buff1 + left1, &p1, &dp1)) == 0)
+	      if ((len1 = get_rdata(header, plen, end1, buff1 + left1, (MAXDNAME * 2) - left1, &p1, &dp1)) == 0)
 		{
 		  quit = 1;
 		  len1 = end1 - p1;
@@ -564,7 +680,7 @@ static void sort_rrset(struct dns_header *header, size_t plen, u16 *rr_desc, int
 	      if (left2 != 0)
 		memmove(buff2, buff2 + len2 - left2, left2);
 	      
-	      if ((len2 = get_rdata(header, plen, end2, buff2 + left2, &p2, &dp2)) == 0)
+	      if ((len2 = get_rdata(header, plen, end2, buff2 + left2, (MAXDNAME *2) - left2, &p2, &dp2)) == 0)
 		{
 		  quit = 1;
 		  len2 = end2 - p2;
@@ -597,6 +713,7 @@ static void sort_rrset(struct dns_header *header, size_t plen, u16 *rr_desc, int
    Return code:
    STAT_SECURE   if it validates.
    STAT_SECURE_WILDCARD if it validates and is the result of wildcard expansion.
+   (In this case *wildcard_out points to the "body" of the wildcard within name.) 
    STAT_NO_SIG no RRsigs found.
    STAT_INSECURE RRset empty.
    STAT_BOGUS    signature is wrong, bad packet.
@@ -607,8 +724,8 @@ static void sort_rrset(struct dns_header *header, size_t plen, u16 *rr_desc, int
 
    name is unchanged on exit. keyname is used as workspace and trashed.
 */
-static int validate_rrset(time_t now, struct dns_header *header, size_t plen, int class, 
+static int validate_rrset(time_t now, struct dns_header *header, size_t plen, int class, int type, 
-			  int type, char *name, char *keyname, struct blockdata *key, int keylen, int algo_in, int keytag_in)
+			  char *name, char *keyname, char **wildcard_out, struct blockdata *key, int keylen, int algo_in, int keytag_in)
 {
   static unsigned char **rrset = NULL, **sigs = NULL;
   static int rrset_sz = 0, sig_sz = 0;
@@ -618,10 +735,13 @@ static int validate_rrset(time_t now, struct dns_header *header, size_t plen, in
   struct crec *crecp = NULL;
   int type_covered, algo, labels, orig_ttl, sig_expiration, sig_inception, key_tag;
   u16 *rr_desc = get_desc(type);
-
+ 
+  if (wildcard_out)
+    *wildcard_out = NULL;
+  
   if (!(p = skip_questions(header, plen)))
     return STAT_BOGUS;
-
+  
   name_labels = count_labels(name); /* For 4035 5.3.2 check */
 
   /* look for RRSIGs for this RRset and get pointers to each RR in the set. */
@@ -780,8 +900,16 @@ static int validate_rrset(time_t now, struct dns_header *header, size_t plen, in
 	    {
 	      int k;
 	      for (k = name_labels - labels; k != 0; k--)
-		while (*name_start != '.' && *name_start != 0)
+		{
-		  name_start++;
+		  while (*name_start != '.' && *name_start != 0)
+		    name_start++;
+		  if (k != 1 && *name_start == '.')
+		    name_start++;
+		}
+	      
+	      if (wildcard_out)
+		*wildcard_out = name_start+1;
+
 	      name_start--;
 	      *name_start = '*';
 	    }
@@ -798,10 +926,11 @@ static int validate_rrset(time_t now, struct dns_header *header, size_t plen, in
 	  
 	  end = p + rdlen;
 	  
-	  /* canonicalise rdata and calculate length of same, use name buffer as workspace */
+	  /* canonicalise rdata and calculate length of same, use name buffer as workspace.
+	     Note that name buffer is twice MAXDNAME long in DNSSEC mode. */
 	  cp = p;
 	  dp = rr_desc;
-	  for (len = 0; (seg = get_rdata(header, plen, end, name, &cp, &dp)) != 0; len += seg);
+	  for (len = 0; (seg = get_rdata(header, plen, end, name, MAXDNAME * 2, &cp, &dp)) != 0; len += seg);
 	  len += end - cp;
 	  len = htons(len);
 	  hash->update(ctx, 2, (unsigned char *)&len); 
@@ -809,7 +938,7 @@ static int validate_rrset(time_t now, struct dns_header *header, size_t plen, in
 	  /* Now canonicalise again and digest. */
 	  cp = p;
 	  dp = rr_desc;
-	  while ((seg = get_rdata(header, plen, end, name, &cp, &dp)))
+	  while ((seg = get_rdata(header, plen, end, name, MAXDNAME * 2, &cp, &dp)))
 	    hash->update(ctx, seg, (unsigned char *)name);
 	  if (cp != end)
 	    hash->update(ctx, end - cp, cp);
@@ -845,8 +974,7 @@ static int validate_rrset(time_t now, struct dns_header *header, size_t plen, in
 /* The DNS packet is expected to contain the answer to a DNSKEY query.
    Put all DNSKEYs in the answer which are valid into the cache.
    return codes:
-         STAT_INSECURE No DNSKEYs in reply.
+         STAT_SECURE   At least one valid DNSKEY found and in cache.
-	 STAT_SECURE   At least one valid DNSKEY found and in cache.
 	 STAT_BOGUS    No DNSKEYs found, which  can be validated with DS,
 	               or self-sign for DNSKEY RRset is not valid, bad packet.
 	 STAT_NEED_DS  DS records to validate a key not found, name in keyname 
@@ -866,11 +994,8 @@ int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, ch
   GETSHORT(qtype, p);
   GETSHORT(qclass, p);
   
-  if (qtype != T_DNSKEY || qclass != class)
+  if (qtype != T_DNSKEY || qclass != class || ntohs(header->ancount) == 0)
     return STAT_BOGUS;
-  
-  if (ntohs(header->ancount) == 0)
-    return STAT_INSECURE;
 
   /* See if we have cached a DS record which validates this key */
   if (!(crecp = cache_find_by_name(NULL, name, now, F_DS)))
@@ -881,7 +1006,7 @@ int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, ch
   
   /* If we've cached that DS provably doesn't exist, result must be INSECURE */
   if (crecp->flags & F_NEG)
-    return STAT_INSECURE;
+    return STAT_INSECURE_DS;
   
   /* NOTE, we need to find ONE DNSKEY which matches the DS */
   for (valid = 0, j = ntohs(header->ancount); j != 0 && !valid; j--) 
@@ -956,7 +1081,7 @@ int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, ch
 	      if (recp1->addr.ds.keylen == (int)hash->digest_size &&
 		  (ds_digest = blockdata_retrieve(recp1->addr.key.keydata, recp1->addr.ds.keylen, NULL)) &&
 		  memcmp(ds_digest, digest, recp1->addr.ds.keylen) == 0 &&
-		  validate_rrset(now, header, plen, class, T_DNSKEY, name, keyname, key, rdlen - 4, algo, keytag) == STAT_SECURE)
+		  validate_rrset(now, header, plen, class, T_DNSKEY, name, keyname, NULL, key, rdlen - 4, algo, keytag) == STAT_SECURE)
 		{
 		  valid = 1;
 		  break;
@@ -1012,7 +1137,7 @@ int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, ch
 		      else
 			{
 			  a.addr.keytag = keytag;
-			  log_query(F_KEYTAG | F_UPSTREAM, name, &a, "DNSKEY keytag %u");
+			  log_query(F_NOEXTRA | F_KEYTAG | F_UPSTREAM, name, &a, "DNSKEY keytag %u");
 			  
 			  recp1->addr.key.keylen = rdlen - 4;
 			  recp1->addr.key.keydata = key;
@@ -1066,24 +1191,24 @@ int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, ch
       return STAT_SECURE;
     }
 
-  log_query(F_UPSTREAM, name, NULL, "BOGUS DNSKEY");
+  log_query(F_NOEXTRA | F_UPSTREAM, name, NULL, "BOGUS DNSKEY");
   return STAT_BOGUS;
 }
 
 /* The DNS packet is expected to contain the answer to a DS query
    Put all DSs in the answer which are valid into the cache.
    return codes:
-   STAT_INSECURE    no DS in reply or not signed.
    STAT_SECURE      At least one valid DS found and in cache.
    STAT_NO_DS       It's proved there's no DS here.
-   STAT_BOGUS       At least one DS found, which fails validation, bad packet.
+   STAT_NO_NS       It's proved there's no DS _or_ NS here.
-   STAT_NEED_DNSKEY DNSKEY records to validate a DS not found, name in keyname
+   STAT_BOGUS       no DS in reply or not signed, fails validation, bad packet.
+   STAT_NEED_KEY    DNSKEY records to validate a DS not found, name in keyname
 */
 
 int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class)
 {
   unsigned char *p = (unsigned char *)(header+1);
-  int qtype, qclass, val, i, neganswer;
+  int qtype, qclass, val, i, neganswer, nons;
 
   if (ntohs(header->qdcount) != 1 ||
       !(p = skip_name(p, header, plen, 4)))
@@ -1095,32 +1220,45 @@ int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char
   if (qtype != T_DS || qclass != class)
     val = STAT_BOGUS;
   else
-    val = dnssec_validate_reply(now, header, plen, name, keyname, NULL, &neganswer);
+    val = dnssec_validate_reply(now, header, plen, name, keyname, NULL, &neganswer, &nons);
+  /* Note dnssec_validate_reply() will have cached positive answers */
+  
+  if (val == STAT_INSECURE)
+    val = STAT_BOGUS;
 
   if (val == STAT_NO_SIG)
-    val = STAT_INSECURE;
+    return val;
   
   p = (unsigned char *)(header+1);
   extract_name(header, plen, &p, name, 1, 4);
   p += 4; /* qtype, qclass */
   
   if (!(p = skip_section(p, ntohs(header->ancount), header, plen)))
-    return STAT_BOGUS;
+    val = STAT_BOGUS;
   
-  if (val == STAT_BOGUS)
+  /* If the key needed to validate the DS is on the same domain as the DS, we'll
-    log_query(F_UPSTREAM, name, NULL, "BOGUS DS");
+     loop getting nowhere. Stop that now. This can happen of the DS answer comes
-  
+     from the DS's zone, and not the parent zone. */
-  if ((val == STAT_SECURE || val == STAT_INSECURE) && neganswer)
+  if (val == STAT_BOGUS ||  (val == STAT_NEED_KEY && hostname_isequal(name, keyname)))
     {
-      int rdlen, flags = F_FORWARD | F_DS | F_NEG;
+      log_query(F_NOEXTRA | F_UPSTREAM, name, NULL, "BOGUS DS");
+      return STAT_BOGUS;
+    }
+
+  /* By here, the answer is proved secure, and a positive answer has been cached. */
+  if (val == STAT_SECURE && neganswer)
+    {
+      int rdlen, flags = F_FORWARD | F_DS | F_NEG | F_DNSSECOK;
       unsigned long ttl, minttl = ULONG_MAX;
       struct all_addr a;
 
       if (RCODE(header) == NXDOMAIN)
 	flags |= F_NXDOMAIN;
       
-      if (val == STAT_SECURE)
+      /* We only cache validated DS records, DNSSECOK flag hijacked 
-	flags |= F_DNSSECOK;
+	 to store presence/absence of NS. */
+      if (nons)
+	flags &= ~F_DNSSECOK;
       
       for (i = ntohs(header->nscount); i != 0; i--)
 	{
@@ -1166,10 +1304,12 @@ int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char
 	  a.addr.dnssec.class = class;
 	  cache_insert(name, &a, now, ttl, flags);
 	  
-	  cache_end_insert(); 
+	  cache_end_insert();  
+	  
+	  log_query(F_NOEXTRA | F_UPSTREAM, name, NULL, nons ? "no delegation" : "no DS");
 	}
 
-      return (val == STAT_SECURE) ? STAT_NO_DS : STAT_INSECURE; 
+      return nons ? STAT_NO_NS : STAT_NO_DS; 
     }
 
   return val;
@@ -1293,12 +1433,15 @@ static int find_nsec_records(struct dns_header *header, size_t plen, unsigned ch
 }
 
 static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsigned char **nsecs, int nsec_count,
-				    char *workspace1, char *workspace2, char *name, int type)
+				    char *workspace1, char *workspace2, char *name, int type, int *nons)
 {
   int i, rc, rdlen;
   unsigned char *p, *psave;
   int offset = (type & 0xff) >> 3;
   int mask = 0x80 >> (type & 0x07);
+
+  if (nons)
+    *nons = 0;
   
   /* Find NSEC record that proves name doesn't exist */
   for (i = 0; i < nsec_count; i++)
@@ -1325,6 +1468,10 @@ static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsi
 	  rdlen -= p - psave;
 	  /* rdlen is now length of type map, and p points to it */
 	  
+	  /* If we can prove that there's no NS record, return that information. */
+	  if (nons && rdlen >= 2 && p[0] == 0 && (p[2] & (0x80 >> T_NS)) == 0)
+	    *nons = 1;
+	  
 	  while (rdlen >= 2)
 	    {
 	      if (!CHECK_LEN(header, p, plen, rdlen))
@@ -1349,13 +1496,13 @@ static int prove_non_existence_nsec(struct dns_header *header, size_t plen, unsi
 	{
 	  /* Normal case, name falls between NSEC name and next domain name,
 	     wrap around case, name falls between NSEC name (rc == -1) and end */
-	  if (hostname_cmp(workspace2, name) == 1 || hostname_cmp(workspace1, workspace2) == 1)
+	  if (hostname_cmp(workspace2, name) >= 0 || hostname_cmp(workspace1, workspace2) >= 0)
 	    return STAT_SECURE;
 	}
       else 
 	{
 	  /* wrap around case, name falls between start and next domain name */
-	  if (hostname_cmp(workspace1, workspace2) == 1 && hostname_cmp(workspace2, name) == 1)
+	  if (hostname_cmp(workspace1, workspace2) >= 0 && hostname_cmp(workspace2, name) >=0 )
 	    return STAT_SECURE;
 	}
     }
@@ -1425,14 +1572,98 @@ static int base32_decode(char *in, unsigned char *out)
   return p - out;
 }
 
+static int check_nsec3_coverage(struct dns_header *header, size_t plen, int digest_len, unsigned char *digest, int type,
+				char *workspace1, char *workspace2, unsigned char **nsecs, int nsec_count, int *nons)
+{
+  int i, hash_len, salt_len, base32_len, rdlen;
+  unsigned char *p, *psave;
+
+  for (i = 0; i < nsec_count; i++)
+    if ((p = nsecs[i]))
+      {
+       	if (!extract_name(header, plen, &p, workspace1, 1, 0) ||
+	    !(base32_len = base32_decode(workspace1, (unsigned char *)workspace2)))
+	  return 0;
+	
+	p += 8; /* class, type, TTL */
+	GETSHORT(rdlen, p);
+	psave = p;
+	p += 4; /* algo, flags, iterations */
+	salt_len = *p++; /* salt_len */
+	p += salt_len; /* salt */
+	hash_len = *p++; /* p now points to next hashed name */
+	
+	if (!CHECK_LEN(header, p, plen, hash_len))
+	  return 0;
+	
+	if (digest_len == base32_len && hash_len == base32_len)
+	  {
+	    int rc = memcmp(workspace2, digest, digest_len);
+
+	    if (rc == 0)
+	      {
+		/* We found an NSEC3 whose hashed name exactly matches the query, so
+		   we just need to check the type map. p points to the RR data for the record. */
+		
+		int offset = (type & 0xff) >> 3;
+		int mask = 0x80 >> (type & 0x07);
+		
+		p += hash_len; /* skip next-domain hash */
+		rdlen -= p - psave;
+
+		if (!CHECK_LEN(header, p, plen, rdlen))
+		  return 0;
+		
+		/* If we can prove that there's no NS record, return that information. */
+		if (nons && rdlen >= 2 && p[0] == 0 && (p[2] & (0x80 >> T_NS)) == 0)
+		  *nons = 1;
+		
+		while (rdlen >= 2)
+		  {
+		    if (p[0] == type >> 8)
+		      {
+			/* Does the NSEC3 say our type exists? */
+			if (offset < p[1] && (p[offset+2] & mask) != 0)
+			  return STAT_BOGUS;
+			
+			break; /* finshed checking */
+		      }
+		    
+		    rdlen -= p[1];
+		    p +=  p[1];
+		  }
+
+		return 1;
+	      }
+	    else if (rc < 0)
+	      {
+		/* Normal case, hash falls between NSEC3 name-hash and next domain name-hash,
+		   wrap around case, name-hash falls between NSEC3 name-hash and end */
+		if (memcmp(p, digest, digest_len) >= 0 || memcmp(workspace2, p, digest_len) >= 0)
+		  return 1;
+	      }
+	    else 
+	      {
+		/* wrap around case, name falls between start and next domain name */
+		if (memcmp(workspace2, p, digest_len) >= 0 && memcmp(p, digest, digest_len) >= 0)
+		  return 1;
+	      }
+	  }
+      }
+  return 0;
+}
+
 static int prove_non_existence_nsec3(struct dns_header *header, size_t plen, unsigned char **nsecs, int nsec_count,
-				     char *workspace1, char *workspace2, char *name, int type)
+				     char *workspace1, char *workspace2, char *name, int type, char *wildname, int *nons)
 {
   unsigned char *salt, *p, *digest;
-  int digest_len, i, iterations, salt_len, hash_len, base32_len, algo = 0;
+  int digest_len, i, iterations, salt_len, base32_len, algo = 0;
   struct nettle_hash const *hash;
   char *closest_encloser, *next_closest, *wildcard;
- 
+  
+  if (nons)
+    *nons = 0;
+  
   /* Look though the NSEC3 records to find the first one with 
      an algorithm we support (currently only algo == 1).
 
@@ -1502,7 +1733,14 @@ static int prove_non_existence_nsec3(struct dns_header *header, size_t plen, uns
   if (!(hash = hash_find("sha1")))
     return STAT_BOGUS;
 
-  /* Now, we need the "closest encloser NSEC3" */
+  if ((digest_len = hash_name(name, &digest, hash, salt, salt_len, iterations)) == 0)
+    return STAT_BOGUS;
+  
+  if (check_nsec3_coverage(header, plen, digest_len, digest, type, workspace1, workspace2, nsecs, nsec_count, nons))
+    return STAT_SECURE;
+
+  /* Can't find an NSEC3 which covers the name directly, we need the "closest encloser NSEC3" 
+     or an answer inferred from a wildcard record. */
   closest_encloser = name;
   next_closest = NULL;
 
@@ -1511,6 +1749,9 @@ static int prove_non_existence_nsec3(struct dns_header *header, size_t plen, uns
       if (*closest_encloser == '.')
 	closest_encloser++;
 
+      if (wildname && hostname_isequal(closest_encloser, wildname))
+	break;
+
       if ((digest_len = hash_name(closest_encloser, &digest, hash, salt, salt_len, iterations)) == 0)
 	return STAT_BOGUS;
       
@@ -1533,132 +1774,39 @@ static int prove_non_existence_nsec3(struct dns_header *header, size_t plen, uns
     }
   while ((closest_encloser = strchr(closest_encloser, '.')));
   
-  /* No usable NSEC3s */
+  if (!closest_encloser)
-  if (i == nsec_count)
     return STAT_BOGUS;
   
-  if (!next_closest)
-    {
-      /* We found an NSEC3 whose hashed name exactly matches the query, so
-	 Now we just need to check the type map. p points to the RR data for the record. */
-      int rdlen;
-      unsigned char *psave;
-      int offset = (type & 0xff) >> 3;
-      int mask = 0x80 >> (type & 0x07);
-      
-      p += 8; /* class, type, TTL */
-      GETSHORT(rdlen, p);
-      psave = p;
-      p += 5 + salt_len; /* algo, flags, iterations, salt_len, salt */
-      hash_len = *p++;
-      if (!CHECK_LEN(header, p, plen, hash_len))
-	return STAT_BOGUS; /* bad packet */
-      p += hash_len;
-      rdlen -= p - psave;
-      
-      while (rdlen >= 2)
-	{
-	  if (!CHECK_LEN(header, p, plen, rdlen))
-	    return STAT_BOGUS;
-	  
-	  if (p[0] == type >> 8)
-	    {
-	      /* Does the NSEC3 say our type exists? */
-	      if (offset < p[1] && (p[offset+2] & mask) != 0)
-		return STAT_BOGUS;
-	      
-	      break; /* finshed checking */
-	    }
-	  
-	  rdlen -= p[1];
-	  p +=  p[1];
-	}
-      
-      return STAT_SECURE;
-    }
-
   /* Look for NSEC3 that proves the non-existence of the next-closest encloser */
   if ((digest_len = hash_name(next_closest, &digest, hash, salt, salt_len, iterations)) == 0)
     return STAT_BOGUS;
 
-  for (i = 0; i < nsec_count; i++)
+  if (!check_nsec3_coverage(header, plen, digest_len, digest, type, workspace1, workspace2, nsecs, nsec_count, NULL))
-    if ((p = nsecs[i]))
+    return STAT_BOGUS;
-      {
-       	if (!extract_name(header, plen, &p, workspace1, 1, 0) ||
-	    !(base32_len = base32_decode(workspace1, (unsigned char *)workspace2)))
-	  return STAT_BOGUS;
-	   
-	p += 15 + salt_len; /* class, type, TTL, rdlen, algo, flags, iterations, salt_len, salt */
-	hash_len = *p++; /* p now points to next hashed name */
- 
-	if (!CHECK_LEN(header, p, plen, hash_len))
-	  return STAT_BOGUS;
-	
-	if (digest_len == base32_len && hash_len == base32_len)
-	  {
-	    if (memcmp(workspace2, digest, digest_len) <= 0)
-	      {
-		/* Normal case, hash falls between NSEC3 name-hash and next domain name-hash,
-		   wrap around case, name-hash falls between NSEC3 name-hash and end */
-		if (memcmp(p, digest, digest_len) > 0 || memcmp(workspace2, p, digest_len) > 0)
-		  return STAT_SECURE;
-	      }
-	    else 
-	      {
-		/* wrap around case, name falls between start and next domain name */
-		if (memcmp(workspace2, p, digest_len) > 0 && memcmp(p, digest, digest_len) > 0)
-		  return STAT_SECURE;
-	      }
-	  }
-      }
   
   /* Finally, check that there's no seat of wildcard synthesis */
-  if (!(wildcard = strchr(next_closest, '.')) || wildcard == next_closest)
+  if (!wildname)
-    return STAT_BOGUS;
+    {
+      if (!(wildcard = strchr(next_closest, '.')) || wildcard == next_closest)
+	return STAT_BOGUS;
+      
+      wildcard--;
+      *wildcard = '*';
+      
+      if ((digest_len = hash_name(wildcard, &digest, hash, salt, salt_len, iterations)) == 0)
+	return STAT_BOGUS;
+      
+      if (!check_nsec3_coverage(header, plen, digest_len, digest, type, workspace1, workspace2, nsecs, nsec_count, NULL))
+	return STAT_BOGUS;
+    }
   
-  wildcard--;
+  return STAT_SECURE;
-  *wildcard = '*';
-  
-  if ((digest_len = hash_name(wildcard, &digest, hash, salt, salt_len, iterations)) == 0)
-    return STAT_BOGUS;
-  
-  for (i = 0; i < nsec_count; i++)
-    if ((p = nsecs[i]))
-      {
-	if (!extract_name(header, plen, &p, workspace1, 1, 0) ||
-	    !(base32_len = base32_decode(workspace1, (unsigned char *)workspace2)))
-	  return STAT_BOGUS;
-	   
-	p += 15 + salt_len; /* class, type, TTL, rdlen, algo, flags, iterations, salt_len, salt */
-	hash_len = *p++; /* p now points to next hashed name */
- 
-	if (!CHECK_LEN(header, p, plen, hash_len))
-	  return STAT_BOGUS;
-	
-	if (digest_len == base32_len && hash_len == base32_len)
-	  {
-	    if (memcmp(workspace2, digest, digest_len) <= 0)
-	      {
-		/* Normal case, hash falls between NSEC3 name-hash and next domain name-hash,
-		   wrap around case, name-hash falls between NSEC3 name-hash and end */
-		if (memcmp(p, digest, digest_len) > 0 || memcmp(workspace2, p, digest_len) > 0)
-		  return STAT_SECURE;
-	      }
-	    else 
-	      {
-		/* wrap around case, name falls between start and next domain name */
-		if (memcmp(workspace2, p, digest_len) > 0 && memcmp(p, digest, digest_len) > 0)
-		  return STAT_SECURE;
-	      }
-	  }
-      }
-  
-  return STAT_BOGUS;
 }
     
 /* Validate all the RRsets in the answer and authority sections of the reply (4035:3.2.3) */
 /* Returns are the same as validate_rrset, plus the class if the missing key is in *class */
-int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, int *neganswer)
+int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, 
+			  int *class, int *neganswer, int *nons)
 {
   unsigned char *ans_start, *qname, *p1, *p2, **nsecs;
   int type1, class1, rdlen1, type2, class2, rdlen2, qclass, qtype;
@@ -1730,11 +1878,14 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
    
   if (neganswer && !have_answer)
     *neganswer = 1;
-
+  
   /* No data, therefore no sigs */
   if (ntohs(header->ancount) + ntohs(header->nscount) == 0)
-    return STAT_NO_SIG;
+    {
-  
+      *keyname = 0;
+      return STAT_NO_SIG;
+    }
+
   for (p1 = ans_start, i = 0; i < ntohs(header->ancount) + ntohs(header->nscount); i++)
     {
       if (!extract_name(header, plen, &p1, name, 1, 10))
@@ -1774,11 +1925,15 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
 	      struct all_addr a;
 	      struct blockdata *key;
 	      struct crec *crecp;
-	      
+	      char *wildname;
-	      rc = validate_rrset(now, header, plen, class1, type1, name, keyname, NULL, 0, 0, 0);
+	      int have_wildcard = 0;
+
+	      rc = validate_rrset(now, header, plen, class1, type1, name, keyname, &wildname, NULL, 0, 0, 0);
 	      
 	      if (rc == STAT_SECURE_WILDCARD)
 		{
+		  have_wildcard = 1;
+
 		  /* An attacker replay a wildcard answer with a different
 		     answer and overlay a genuine RR. To prove this
 		     hasn't happened, the answer must prove that
@@ -1787,10 +1942,11 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
 		    return STAT_BOGUS; /* No NSECs or bad packet */
 		  
 		  if (nsec_type == T_NSEC)
-		    rc = prove_non_existence_nsec(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, type1);
+		    rc = prove_non_existence_nsec(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, type1, NULL);
 		  else
-		    rc = prove_non_existence_nsec3(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, type1);
+		    rc = prove_non_existence_nsec3(header, plen, nsecs, nsec_count, daemon->workspacename, 
-
+						   keyname, name, type1, wildname, NULL);
+		  
 		  if (rc != STAT_SECURE)
 		    return rc;
 		} 
@@ -1798,6 +1954,19 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
 		{
 		  if (class)
 		    *class = class1; /* Class for DS or DNSKEY */
+
+		  if (rc == STAT_NO_SIG)
+		    {
+		      /* If we dropped off the end of a CNAME chain, return
+			 STAT_NO_SIG and the last name is keyname. This is used for proving non-existence
+			 if DS records in CNAME chains. */
+		      if (cname_count == CNAME_CHAIN || i < ntohs(header->ancount)) 
+			/* No CNAME chain, or no sig in answer section, return empty name. */
+			*keyname = 0;
+		      else if (!extract_name(header, plen, &qname, keyname, 1, 0))
+			return STAT_BOGUS;
+		    }
+ 
 		  return rc;
 		}
 	      
@@ -1840,7 +2009,7 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
 			      else
 				{
 				  a.addr.keytag = keytag;
-				  log_query(F_KEYTAG | F_UPSTREAM, name, &a, "DS keytag %u");
+				  log_query(F_NOEXTRA | F_KEYTAG | F_UPSTREAM, name, &a, "DS keytag %u");
 				  crecp->addr.ds.digest = digest;
 				  crecp->addr.ds.keydata = key;
 				  crecp->addr.ds.algo = algo;
@@ -1868,7 +2037,11 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
 			      p2 += 13; /* labels, orig_ttl, expiration, inception */
 			      GETSHORT(keytag, p2);
 			      
-			      if ((key = blockdata_alloc((char*)psave, rdlen2)))
+			      /* We don't cache sigs for wildcard answers, because to reproduce the
+				 answer from the cache will require one or more NSEC/NSEC3 records 
+				 which we don't cache. The lack of the RRSIG ensures that a query for
+				 this RRset asking for a secure answer will always be forwarded. */
+			      if (!have_wildcard && (key = blockdata_alloc((char*)psave, rdlen2)))
 				{
 				  if (!(crecp = cache_insert(name, &a, now, ttl,  F_FORWARD | F_DNSKEY | F_DS)))
 				    blockdata_free(key);
@@ -1906,16 +2079,26 @@ int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, ch
   /* NXDOMAIN or NODATA reply, prove that (name, class1, type1) can't exist */
   /* First marshall the NSEC records, if we've not done it previously */
   if (!nsec_type && !(nsec_type = find_nsec_records(header, plen, &nsecs, &nsec_count, qclass)))
-    return STAT_BOGUS; /* No NSECs */
+    {
+      /* No NSEC records. If we dropped off the end of a CNAME chain, return
+	 STAT_NO_SIG and the last name is keyname. This is used for proving non-existence
+	 if DS records in CNAME chains. */
+      if (cname_count == CNAME_CHAIN) /* No CNAME chain, return empty name. */
+	*keyname = 0;
+      else if (!extract_name(header, plen, &qname, keyname, 1, 0))
+	return STAT_BOGUS;
+      return STAT_NO_SIG; /* No NSECs, this is probably a dangling CNAME pointing into
+			     an unsigned zone. Return STAT_NO_SIG to cause this to be proved. */
+    }
    
   /* Get name of missing answer */
   if (!extract_name(header, plen, &qname, name, 1, 0))
     return STAT_BOGUS;
   
   if (nsec_type == T_NSEC)
-    return prove_non_existence_nsec(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, qtype);
+    return prove_non_existence_nsec(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, qtype, nons);
   else
-    return prove_non_existence_nsec3(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, qtype);
+    return prove_non_existence_nsec3(header, plen, nsecs, nsec_count, daemon->workspacename, keyname, name, qtype, NULL, nons);
 }
 
 /* Chase the CNAME chain in the packet until the first record which _doesn't validate.
@@ -1962,7 +2145,7 @@ int dnssec_chase_cname(time_t now, struct dns_header *header, size_t plen, char
 	    return STAT_INSECURE;
 	  
 	  /* validate CNAME chain, return if insecure or need more data */
-	  rc = validate_rrset(now, header, plen, class, type, name, keyname, NULL, 0, 0, 0);
+	  rc = validate_rrset(now, header, plen, class, type, name, keyname, NULL, NULL, 0, 0, 0);
 	  if (rc != STAT_SECURE)
 	    {
 	      if (rc == STAT_NO_SIG)
@@ -2007,16 +2190,18 @@ int dnskey_keytag(int alg, int flags, unsigned char *key, int keylen)
     }
 }
 
-size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr)
+size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, 
+			     int type, union mysockaddr *addr, int edns_pktsz)
 {
   unsigned char *p;
   char *types = querystr("dnssec-query", type);
+  size_t ret;
 
   if (addr->sa.sa_family == AF_INET) 
-    log_query(F_DNSSEC | F_IPV4, name, (struct all_addr *)&addr->in.sin_addr, types);
+    log_query(F_NOEXTRA | F_DNSSEC | F_IPV4, name, (struct all_addr *)&addr->in.sin_addr, types);
 #ifdef HAVE_IPV6
   else
-    log_query(F_DNSSEC | F_IPV6, name, (struct all_addr *)&addr->in6.sin6_addr, types);
+    log_query(F_NOEXTRA | F_DNSSEC | F_IPV6, name, (struct all_addr *)&addr->in6.sin6_addr, types);
 #endif
   
   header->qdcount = htons(1);
@@ -2039,7 +2224,12 @@ size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, i
   PUTSHORT(type, p);
   PUTSHORT(class, p);
 
-  return add_do_bit(header, p - (unsigned char *)header, end);
+  ret = add_do_bit(header, p - (unsigned char *)header, end);
+
+  if (find_pseudoheader(header, ret, NULL, &p, NULL))
+    PUTSHORT(edns_pktsz, p);
+
+  return ret;
 }
 
 /* Go through a domain name, find "pointers" and fix them up based on how many bytes

src/domain.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/helper.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/inotify.c

@@ -0,0 +1,288 @@
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
+ 
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+#ifdef HAVE_INOTIFY
+
+#include <sys/inotify.h>
+#include <sys/param.h> /* For MAXSYMLINKS */
+
+/* the strategy is to set a inotify on the directories containing
+   resolv files, for any files in the directory which are close-write 
+   or moved into the directory.
+   
+   When either of those happen, we look to see if the file involved
+   is actually a resolv-file, and if so, call poll-resolv with
+   the "force" argument, to ensure it's read.
+
+   This adds one new error condition: the directories containing
+   all specified resolv-files must exist at start-up, even if the actual
+   files don't. 
+*/
+
+static char *inotify_buffer;
+#define INOTIFY_SZ (sizeof(struct inotify_event) + NAME_MAX + 1)
+
+/* If path is a symbolic link, return the path it
+   points to, made absolute if relative.
+   If path doesn't exist or is not a symlink, return NULL.
+   Return value is malloc'ed */
+static char *my_readlink(char *path)
+{
+  ssize_t rc, size = 64;
+  char *buf;
+
+  while (1)
+    {
+      buf = safe_malloc(size);
+      rc = readlink(path, buf, (size_t)size);
+      
+      if (rc == -1)
+	{
+	  /* Not link or doesn't exist. */
+	  if (errno == EINVAL || errno == ENOENT)
+	    return NULL;
+	  else
+	    die(_("cannot access path %s: %s"), path, EC_MISC);
+	}
+      else if (rc < size-1)
+	{
+	  char *d;
+	  
+	  buf[rc] = 0;
+	  if (buf[0] != '/' && ((d = strrchr(path, '/'))))
+	    {
+	      /* Add path to relative link */
+	      char *new_buf = safe_malloc((d - path) + strlen(buf) + 2);
+	      *(d+1) = 0;
+	      strcpy(new_buf, path);
+	      strcat(new_buf, buf);
+	      free(buf);
+	      buf = new_buf;
+	    }
+	  return buf;
+	}
+
+      /* Buffer too small, increase and retry */
+      size += 64;
+      free(buf);
+    }
+}
+
+void inotify_dnsmasq_init()
+{
+  struct resolvc *res;
+  inotify_buffer = safe_malloc(INOTIFY_SZ);
+  daemon->inotifyfd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
+  
+  if (daemon->inotifyfd == -1)
+    die(_("failed to create inotify: %s"), NULL, EC_MISC);
+  
+  for (res = daemon->resolv_files; res; res = res->next)
+    {
+      char *d, *new_path, *path = safe_malloc(strlen(res->name) + 1);
+      int links = MAXSYMLINKS;
+
+      strcpy(path, res->name);
+
+      /* Follow symlinks until we reach a non-symlink, or a non-existant file. */
+      while ((new_path = my_readlink(path)))
+	{
+	  if (links-- == 0)
+	    die(_("too many symlinks following %s"), res->name, EC_MISC);
+	  free(path);
+	  path = new_path;
+	}
+
+      res->wd = -1;
+
+      if ((d = strrchr(path, '/')))
+	{
+	  *d = 0; /* make path just directory */
+	  res->wd = inotify_add_watch(daemon->inotifyfd, path, IN_CLOSE_WRITE | IN_MOVED_TO);
+
+	  res->file = d+1; /* pointer to filename */
+	  *d = '/';
+	  
+	  if (res->wd == -1 && errno == ENOENT)
+	    die(_("directory %s for resolv-file is missing, cannot poll"), res->name, EC_MISC);
+	}	  
+	 
+      if (res->wd == -1)
+	die(_("failed to create inotify for %s: %s"), res->name, EC_MISC);
+	
+    }
+}
+
+
+/* initialisation for dynamic-dir. Set inotify watch for each directory, and read pre-existing files */
+void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz)
+{
+  struct hostsfile *ah;
+  
+  for (ah = daemon->dynamic_dirs; ah; ah = ah->next)
+    {
+      DIR *dir_stream = NULL;
+      struct dirent *ent;
+      struct stat buf;
+     
+      if (!(ah->flags & flag))
+	continue;
+ 
+      if (stat(ah->fname, &buf) == -1 || !(S_ISDIR(buf.st_mode)))
+	{
+	  my_syslog(LOG_ERR, _("bad dynamic directory %s: %s"), 
+		    ah->fname, strerror(errno));
+	  continue;
+	}
+      
+       if (!(ah->flags & AH_WD_DONE))
+	 {
+	   ah->wd = inotify_add_watch(daemon->inotifyfd, ah->fname, IN_CLOSE_WRITE | IN_MOVED_TO);
+	   ah->flags |= AH_WD_DONE;
+	 }
+
+       /* Read contents of dir _after_ calling add_watch, in the hope of avoiding
+	  a race which misses files being added as we start */
+       if (ah->wd == -1 || !(dir_stream = opendir(ah->fname)))
+	 {
+	   my_syslog(LOG_ERR, _("failed to create inotify for %s: %s"),
+		     ah->fname, strerror(errno));
+	   continue;
+	 }
+
+       while ((ent = readdir(dir_stream)))
+	 {
+	   size_t lendir = strlen(ah->fname);
+	   size_t lenfile = strlen(ent->d_name);
+	   char *path;
+	   
+	   /* ignore emacs backups and dotfiles */
+	   if (lenfile == 0 || 
+	       ent->d_name[lenfile - 1] == '~' ||
+	       (ent->d_name[0] == '#' && ent->d_name[lenfile - 1] == '#') ||
+	       ent->d_name[0] == '.')
+	     continue;
+	   
+	   if ((path = whine_malloc(lendir + lenfile + 2)))
+	     {
+	       strcpy(path, ah->fname);
+	       strcat(path, "/");
+	       strcat(path, ent->d_name);
+	       
+	       /* ignore non-regular files */
+	       if (stat(path, &buf) != -1 && S_ISREG(buf.st_mode))
+		 {
+		   if (ah->flags & AH_HOSTS)
+		     total_size = read_hostsfile(path, ah->index, total_size, rhash, revhashsz);
+#ifdef HAVE_DHCP
+		   else if (ah->flags & (AH_DHCP_HST | AH_DHCP_OPT))
+		     option_read_dynfile(path, ah->flags);
+#endif		   
+		 }
+
+	       free(path);
+	     }
+	 }
+    }
+}
+
+int inotify_check(time_t now)
+{
+  int hit = 0;
+  struct hostsfile *ah;
+
+  while (1)
+    {
+      int rc;
+      char *p;
+      struct resolvc *res;
+      struct inotify_event *in;
+
+      while ((rc = read(daemon->inotifyfd, inotify_buffer, INOTIFY_SZ)) == -1 && errno == EINTR);
+      
+      if (rc <= 0)
+	break;
+      
+      for (p = inotify_buffer; rc - (p - inotify_buffer) >= (int)sizeof(struct inotify_event); p += sizeof(struct inotify_event) + in->len) 
+	{
+	  in = (struct inotify_event*)p;
+	  
+	  for (res = daemon->resolv_files; res; res = res->next)
+	    if (res->wd == in->wd && in->len != 0 && strcmp(res->file, in->name) == 0)
+	      hit = 1;
+
+	  /* ignore emacs backups and dotfiles */
+	  if (in->len == 0 || 
+	      in->name[in->len - 1] == '~' ||
+	      (in->name[0] == '#' && in->name[in->len - 1] == '#') ||
+	      in->name[0] == '.')
+	    continue;
+	  
+	  for (ah = daemon->dynamic_dirs; ah; ah = ah->next)
+	    if (ah->wd == in->wd)
+	      {
+		size_t lendir = strlen(ah->fname);
+		char *path;
+		
+		if ((path = whine_malloc(lendir + in->len + 2)))
+		  {
+		    strcpy(path, ah->fname);
+		    strcat(path, "/");
+		    strcat(path, in->name);
+		     
+		    my_syslog(LOG_INFO, _("inotify, new or changed file %s"), path);
+
+		    if (ah->flags & AH_HOSTS)
+		      {
+			read_hostsfile(path, ah->index, 0, NULL, 0);
+#ifdef HAVE_DHCP
+			if (daemon->dhcp || daemon->doing_dhcp6) 
+			  {
+			    /* Propogate the consequences of loading a new dhcp-host */
+			    dhcp_update_configs(daemon->dhcp_conf);
+			    lease_update_from_configs(); 
+			    lease_update_file(now); 
+			    lease_update_dns(1);
+			  }
+#endif
+		      }
+#ifdef HAVE_DHCP
+		    else if (ah->flags & AH_DHCP_HST)
+		      {
+			if (option_read_dynfile(path, AH_DHCP_HST))
+			  {
+			    /* Propogate the consequences of loading a new dhcp-host */
+			    dhcp_update_configs(daemon->dhcp_conf);
+			    lease_update_from_configs(); 
+			    lease_update_file(now); 
+			    lease_update_dns(1);
+			  }
+		      }
+		    else if (ah->flags & AH_DHCP_OPT)
+		      option_read_dynfile(path, AH_DHCP_OPT);
+#endif
+		    
+		    free(path);
+		  }
+	      }
+	}
+    }
+  return hit;
+}
+
+#endif  /* INOTIFY */
+  

src/ip6addr.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/ipset.c

@@ -121,7 +121,6 @@ static int new_add_to_ipset(const char *setname, const struct all_addr *ipaddr,
   struct my_nlattr *nested[2];
   uint8_t proto;
   int addrsz = INADDRSZ;
-  ssize_t rc;
 
 #ifdef HAVE_IPV6
   if (af == AF_INET6)
@@ -162,9 +161,10 @@ static int new_add_to_ipset(const char *setname, const struct all_addr *ipaddr,
   nested[1]->nla_len = (void *)buffer + NL_ALIGN(nlh->nlmsg_len) - (void *)nested[1];
   nested[0]->nla_len = (void *)buffer + NL_ALIGN(nlh->nlmsg_len) - (void *)nested[0];
 	
-  while ((rc = sendto(ipset_sock, buffer, nlh->nlmsg_len, 0,
+  while (retry_send(sendto(ipset_sock, buffer, nlh->nlmsg_len, 0,
-		      (struct sockaddr *)&snl, sizeof(snl))) == -1 && retry_send());
+			   (struct sockaddr *)&snl, sizeof(snl))));
-  return rc;
+								    
+  return errno == 0 ? 0 : -1;
 }
 
 

src/lease.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -352,16 +352,21 @@ static int find_interface_v4(struct in_addr local, int if_index, char *label,
 			     struct in_addr netmask, struct in_addr broadcast, void *vparam)
 {
   struct dhcp_lease *lease;
-  
+  int prefix = netmask_length(netmask);
+
   (void) label;
   (void) broadcast;
   (void) vparam;
 
   for (lease = leases; lease; lease = lease->next)
-    if (!(lease->flags & (LEASE_TA | LEASE_NA)))
+    if (!(lease->flags & (LEASE_TA | LEASE_NA)) &&
-      if (is_same_net(local, lease->addr, netmask))
+	is_same_net(local, lease->addr, netmask) && 
-	lease_set_interface(lease, if_index, *((time_t *)vparam));
+	prefix > lease->new_prefixlen) 
-  
+      {
+	lease->new_interface = if_index;
+        lease->new_prefixlen = prefix;
+      }
+
   return 1;
 }
 
@@ -371,17 +376,23 @@ static int find_interface_v6(struct in6_addr *local,  int prefix,
 			     int preferred, int valid, void *vparam)
 {
   struct dhcp_lease *lease;
-  
+
   (void)scope;
   (void)flags;
   (void)preferred;
   (void)valid;
+  (void)vparam;
 
   for (lease = leases; lease; lease = lease->next)
     if ((lease->flags & (LEASE_TA | LEASE_NA)))
-      if (is_same_net6(local, &lease->addr6, prefix))
+      if (is_same_net6(local, &lease->addr6, prefix) && prefix > lease->new_prefixlen) {
-	lease_set_interface(lease, if_index, *((time_t *)vparam));
+        /* save prefix length for comparison, as we might get shorter matching
-  
+         * prefix in upcoming netlink GETADDR responses
+         * */
+        lease->new_interface = if_index;
+        lease->new_prefixlen = prefix;
+      }
+
   return 1;
 }
 
@@ -414,10 +425,19 @@ void lease_update_slaac(time_t now)
    start-time. */
 void lease_find_interfaces(time_t now)
 {
+  struct dhcp_lease *lease;
+  
+  for (lease = leases; lease; lease = lease->next)
+    lease->new_prefixlen = lease->new_interface = 0;
+
   iface_enumerate(AF_INET, &now, find_interface_v4);
 #ifdef HAVE_DHCP6
   iface_enumerate(AF_INET6, &now, find_interface_v6);
 #endif
+
+  for (lease = leases; lease; lease = lease->next)
+    if (lease->new_interface != 0) 
+      lease_set_interface(lease, lease->new_interface, now);
 }
 
 #ifdef HAVE_DHCP6
@@ -793,9 +813,9 @@ void lease_set_iaid(struct dhcp_lease *lease, int iaid)
 }
 #endif
 
-void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
+void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr,
-		      unsigned char *clid, int hw_len, int hw_type, int clid_len, 
+		      const unsigned char *clid, int hw_len, int hw_type,
-		      time_t now, int force)
+		      int clid_len, time_t now, int force)
 {
 #ifdef HAVE_DHCP6
   int change = force;
@@ -877,7 +897,7 @@ static void kill_name(struct dhcp_lease *lease)
   lease->hostname = lease->fqdn = NULL;
 }
 
-void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain)
+void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain)
 {
   struct dhcp_lease *lease_tmp;
   char *new_name = NULL, *new_fqdn = NULL;

src/log.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -421,18 +421,15 @@ void my_syslog(int priority, const char *format, ...)
     } 
 }
 
-void set_log_writer(fd_set *set, int *maxfdp)
+void set_log_writer(void)
 {
   if (entries && log_fd != -1 && connection_good)
-    {
+    poll_listen(log_fd, POLLOUT);
-      FD_SET(log_fd, set);
-      bump_maxfd(log_fd, maxfdp);
-    }
 }
 
-void check_log_writer(fd_set *set)
+void check_log_writer(int force)
 {
-  if (log_fd != -1 && (!set || FD_ISSET(log_fd, set)))
+  if (log_fd != -1 && (force || poll_check(log_fd, POLLOUT)))
     log_write();
 }
 

src/loop.c

@@ -0,0 +1,117 @@
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+
+#ifdef HAVE_LOOP
+static ssize_t loop_make_probe(u32 uid);
+
+void loop_send_probes()
+{
+   struct server *serv;
+   
+   if (!option_bool(OPT_LOOP_DETECT))
+     return;
+
+   /* Loop through all upstream servers not for particular domains, and send a query to that server which is
+      identifiable, via the uid. If we see that query back again, then the server is looping, and we should not use it. */
+   for (serv = daemon->servers; serv; serv = serv->next)
+     if (!(serv->flags & 
+	   (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND | SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_LOOP)))
+       {
+	 ssize_t len = loop_make_probe(serv->uid);
+	 int fd;
+	 struct randfd *rfd = NULL;
+	 
+	 if (serv->sfd)
+	   fd = serv->sfd->fd;
+	 else 
+	   {
+	     if (!(rfd = allocate_rfd(serv->addr.sa.sa_family)))
+	       continue;
+	     fd = rfd->fd;
+	   }
+
+	 while (retry_send(sendto(fd, daemon->packet, len, 0, 
+				  &serv->addr.sa, sa_len(&serv->addr))));
+	 
+	 free_rfd(rfd);
+       }
+}
+  
+static ssize_t loop_make_probe(u32 uid)
+{
+  struct dns_header *header = (struct dns_header *)daemon->packet;
+  unsigned char *p = (unsigned char *)(header+1);
+
+  /* packet buffer overwritten */
+  daemon->srv_save = NULL;
+  
+  header->id = rand16();
+  header->ancount = header->nscount = header->arcount = htons(0);
+  header->qdcount = htons(1);
+  header->hb3 = HB3_RD;
+  header->hb4 = 0;
+  SET_OPCODE(header, QUERY);
+
+  *p++ = 8;
+  sprintf((char *)p, "%.8x", uid);
+  p += 8;
+  *p++ = strlen(LOOP_TEST_DOMAIN);
+  strcpy((char *)p, LOOP_TEST_DOMAIN); /* Add terminating zero */
+  p += strlen(LOOP_TEST_DOMAIN) + 1;
+
+  PUTSHORT(LOOP_TEST_TYPE, p);
+  PUTSHORT(C_IN, p);
+
+  return p - (unsigned char *)header;
+}
+  
+
+int detect_loop(char *query, int type)
+{
+  int i;
+  u32 uid;
+  struct server *serv;
+  
+  if (!option_bool(OPT_LOOP_DETECT))
+    return 0;
+
+  if (type != LOOP_TEST_TYPE ||
+      strlen(LOOP_TEST_DOMAIN) + 9 != strlen(query) ||
+      strstr(query, LOOP_TEST_DOMAIN) != query + 9)
+    return 0;
+
+  for (i = 0; i < 8; i++)
+    if (!isxdigit(query[i]))
+      return 0;
+
+  uid = strtol(query, NULL, 16);
+
+  for (serv = daemon->servers; serv; serv = serv->next)
+     if (!(serv->flags & 
+	   (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND | SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_LOOP)) &&
+	 uid == serv->uid)
+       {
+	 serv->flags |= SERV_LOOP;
+	 check_servers(); /* log new state */
+	 return 1;
+       }
+
+  return 0;
+}
+
+#endif

src/netlink.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -38,7 +38,7 @@
 static struct iovec iov;
 static u32 netlink_pid;
 
-static int nl_async(struct nlmsghdr *h);
+static void nl_async(struct nlmsghdr *h);
 
 void netlink_init(void)
 {
@@ -142,7 +142,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
   struct nlmsghdr *h;
   ssize_t len;
   static unsigned int seq = 0;
-  int callback_ok = 1, newaddr = 0;
+  int callback_ok = 1;
 
   struct {
     struct nlmsghdr nlh;
@@ -169,10 +169,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
   req.g.rtgen_family = family; 
 
   /* Don't block in recvfrom if send fails */
-  while((len = sendto(daemon->netlinkfd, (void *)&req, sizeof(req), 0, 
+  while(retry_send(sendto(daemon->netlinkfd, (void *)&req, sizeof(req), 0, 
-		      (struct sockaddr *)&addr, sizeof(addr))) == -1 && retry_send());
+			  (struct sockaddr *)&addr, sizeof(addr))));
-  
+
-  if (len == -1)
+  if (errno != 0)
     return 0;
     
   while (1)
@@ -191,21 +191,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	if (h->nlmsg_seq != seq || h->nlmsg_pid != netlink_pid || h->nlmsg_type == NLMSG_ERROR)
 	  {
 	    /* May be multicast arriving async */
-	    if (nl_async(h))
+	    nl_async(h);
-	      {
-		newaddr = 1; 
-		enumerate_interfaces(1); /* reset */
-	      }
 	  }
 	else if (h->nlmsg_type == NLMSG_DONE)
-	  {
+	  return callback_ok;
-	    /* handle async new interface address arrivals, these have to be done
-	       after we complete as we're not re-entrant */
-	    if (newaddr) 
-	      newaddress(dnsmasq_time());
-		
-	    return callback_ok;
-	  }
 	else if (h->nlmsg_type == RTM_NEWADDR && family != AF_UNSPEC && family != AF_LOCAL)
 	  {
 	    struct ifaddrmsg *ifa = NLMSG_DATA(h);  
@@ -219,7 +208,8 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 		    struct in_addr netmask, addr, broadcast;
 		    char *label = NULL;
 
-		    netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
+		    netmask.s_addr = htonl(~(in_addr_t)0 << (32 - ifa->ifa_prefixlen));
+
 		    addr.s_addr = 0;
 		    broadcast.s_addr = 0;
 		    
@@ -330,11 +320,11 @@ int iface_enumerate(int family, void *parm, int (*callback)())
     }
 }
 
-void netlink_multicast(time_t now)
+void netlink_multicast(void)
 {
   ssize_t len;
   struct nlmsghdr *h;
-  int flags, newaddr = 0;
+  int flags;
   
   /* don't risk blocking reading netlink messages here. */
   if ((flags = fcntl(daemon->netlinkfd, F_GETFL)) == -1 ||
@@ -343,24 +333,19 @@ void netlink_multicast(time_t now)
   
   if ((len = netlink_recv()) != -1)
     for (h = (struct nlmsghdr *)iov.iov_base; NLMSG_OK(h, (size_t)len); h = NLMSG_NEXT(h, len))
-      if (nl_async(h))
+      nl_async(h);
-	newaddr = 1;
   
   /* restore non-blocking status */
   fcntl(daemon->netlinkfd, F_SETFL, flags);
-  
-  if (newaddr) 
-    newaddress(now);
 }
 
-static int nl_async(struct nlmsghdr *h)
+static void nl_async(struct nlmsghdr *h)
 {
   if (h->nlmsg_type == NLMSG_ERROR)
     {
       struct nlmsgerr *err = NLMSG_DATA(h);
       if (err->error != 0)
 	my_syslog(LOG_ERR, _("netlink returns error: %s"), strerror(-(err->error)));
-      return 0;
     }
   else if (h->nlmsg_pid == 0 && h->nlmsg_type == RTM_NEWROUTE) 
     {
@@ -372,31 +357,10 @@ static int nl_async(struct nlmsghdr *h)
       struct rtmsg *rtm = NLMSG_DATA(h);
       
       if (rtm->rtm_type == RTN_UNICAST && rtm->rtm_scope == RT_SCOPE_LINK)
-	{
+	queue_event(EVENT_NEWROUTE);
-  	  /* Force re-reading resolv file right now, for luck. */
-	  daemon->last_resolv = 0;
-	  
-	  if (daemon->srv_save)
-	    {
-	      int fd;
-
-	      if (daemon->srv_save->sfd)
-		fd = daemon->srv_save->sfd->fd;
-	      else if (daemon->rfd_save && daemon->rfd_save->refcount != 0)
-		fd = daemon->rfd_save->fd;
-	      else
-		return 0;
-	      
-	      while(sendto(fd, daemon->packet, daemon->packet_len, 0,
-			   &daemon->srv_save->addr.sa, sa_len(&daemon->srv_save->addr)) == -1 && retry_send()); 
-	    }
-	}
-      return 0;
     }
   else if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR) 
-    return 1; /* clever bind mode - rescan */
+    queue_event(EVENT_NEWADDR);
-  
-  return 0;
 }
 #endif
 

src/network.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -16,10 +16,6 @@
 
 #include "dnsmasq.h"
 
-#ifndef IN6_IS_ADDR_ULA
-#define IN6_IS_ADDR_ULA(a) ((((__const uint32_t *) (a))[0] & htonl (0xfe00000)) == htonl (0xfc000000))
-#endif
-
 #ifdef HAVE_LINUX_NETWORK
 
 int indextoname(int fd, int index, char *name)
@@ -240,7 +236,7 @@ struct iface_param {
 };
 
 static int iface_allowed(struct iface_param *param, int if_index, char *label,
-			 union mysockaddr *addr, struct in_addr netmask, int prefixlen, int dad) 
+			 union mysockaddr *addr, struct in_addr netmask, int prefixlen, int iface_flags) 
 {
   struct irec *iface;
   int mtu = 0, loopback;
@@ -392,6 +388,10 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
 		 {
 		    al->addr.addr.addr6 = addr->in6.sin6_addr;
 		    al->flags = ADDRLIST_IPV6;
+		    /* Privacy addresses and addresses still undergoing DAD and deprecated addresses
+		       don't appear in forward queries, but will in reverse ones. */
+		    if (!(iface_flags & IFACE_PERMANENT) || (iface_flags & (IFACE_DEPRECATED | IFACE_TENTATIVE)))
+		      al->flags |= ADDRLIST_REVONLY;
 		 } 
 #endif
 	      }
@@ -403,7 +403,7 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
   for (iface = daemon->interfaces; iface; iface = iface->next) 
     if (sockaddr_isequal(&iface->addr, addr))
       {
-	iface->dad = dad;
+	iface->dad = !!(iface_flags & IFACE_TENTATIVE);
 	iface->found = 1; /* for garbage collection */
 	return 1;
       }
@@ -478,7 +478,7 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
       iface->dhcp_ok = dhcp_ok;
       iface->dns_auth = auth_dns;
       iface->mtu = mtu;
-      iface->dad = dad;
+      iface->dad = !!(iface_flags & IFACE_TENTATIVE);
       iface->found = 1;
       iface->done = iface->multicast_done = iface->warned = 0;
       iface->index = if_index;
@@ -523,7 +523,7 @@ static int iface_allowed_v6(struct in6_addr *local, int prefix,
   else
     addr.in6.sin6_scope_id = 0;
   
-  return iface_allowed((struct iface_param *)vparam, if_index, NULL, &addr, netmask, prefix, !!(flags & IFACE_TENTATIVE));
+  return iface_allowed((struct iface_param *)vparam, if_index, NULL, &addr, netmask, prefix, flags);
 }
 #endif
 
@@ -551,7 +551,7 @@ static int iface_allowed_v4(struct in_addr local, int if_index, char *label,
 int enumerate_interfaces(int reset)
 {
   static struct addrlist *spare = NULL;
-  static int done = 0, active = 0;
+  static int done = 0;
   struct iface_param param;
   int errsave, ret = 1;
   struct addrlist *addr, *tmp;
@@ -570,14 +570,11 @@ int enumerate_interfaces(int reset)
       return 1;
     }
 
-  if (done || active)
+  if (done)
     return 1;
 
   done = 1;
 
-  /* protect against recusive calls from iface_enumerate(); */
-  active = 1;
-
   if ((param.fd = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
     return 0;
  
@@ -677,10 +674,8 @@ int enumerate_interfaces(int reset)
     }
   
   errno = errsave;
-  
   spare = param.spare;
-  active = 0;
+    
-  
   return ret;
 }
 
@@ -1302,8 +1297,14 @@ void mark_servers(int flag)
 
   /* mark everything with argument flag */
   for (serv = daemon->servers; serv; serv = serv->next)
-    if (serv->flags & flag)
+    {
-      serv->flags |= SERV_MARK;
+      if (serv->flags & flag)
+	serv->flags |= SERV_MARK;
+#ifdef HAVE_LOOP
+      /* Give looped servers another chance */
+      serv->flags &= ~SERV_LOOP;
+#endif
+    }
 }
 
 void cleanup_servers(void)
@@ -1325,6 +1326,11 @@ void cleanup_servers(void)
       else 
        up = &serv->next;
     }
+
+#ifdef HAVE_LOOP
+  /* Now we have a new set of servers, test for loops. */
+  loop_send_probes();
+#endif
 }
 
 void add_update_server(int flags,
@@ -1390,7 +1396,11 @@ void add_update_server(int flags,
       serv->domain = domain_str;
       serv->next = next;
       serv->queries = serv->failed_queries = 0;
-      
+      serv->edns_pktsz = daemon->edns_pktsz;
+#ifdef HAVE_LOOP
+      serv->uid = rand32();
+#endif      
+
       if (domain)
 	serv->flags |= SERV_HAS_DOMAIN;
       
@@ -1450,7 +1460,7 @@ void check_servers(void)
 	    }
 	}
       
-      if (!(serv->flags & SERV_NO_REBIND))
+      if (!(serv->flags & SERV_NO_REBIND) && !(serv->flags & SERV_LITERAL_ADDRESS))
 	{
 	  if (serv->flags & (SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_USE_RESOLV))
 	    {
@@ -1466,9 +1476,13 @@ void check_servers(void)
 		my_syslog(LOG_INFO, _("using local addresses only for %s %s"), s1, s2);
 	      else if (serv->flags & SERV_USE_RESOLV)
 		my_syslog(LOG_INFO, _("using standard nameservers for %s %s"), s1, s2);
-	      else if (!(serv->flags & SERV_LITERAL_ADDRESS))
+	      else 
 		my_syslog(LOG_INFO, _("using nameserver %s#%d for %s %s"), daemon->namebuff, port, s1, s2);
 	    }
+#ifdef HAVE_LOOP
+	  else if (serv->flags & SERV_LOOP)
+	    my_syslog(LOG_INFO, _("NOT using nameserver %s#%d - query loop detected"), daemon->namebuff, port); 
+#endif
 	  else if (serv->interface[0] != 0)
 	    my_syslog(LOG_INFO, _("using nameserver %s#%d(via %s)"), daemon->namebuff, port, serv->interface); 
 	  else
@@ -1564,7 +1578,6 @@ int reload_servers(char *fname)
   return gotone;
 }
 
-#if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
 /* Called when addresses are added or deleted from an interface */
 void newaddress(time_t now)
 {
@@ -1589,7 +1602,6 @@ void newaddress(time_t now)
 #endif
 }
 
-#endif
 
 
 

src/option.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -146,6 +146,14 @@ struct myoption {
 #define LOPT_DNSSEC_CHECK  334
 #define LOPT_LOCAL_SERVICE 335
 #define LOPT_DNSSEC_TIME   336
+#define LOPT_LOOP_DETECT   337
+#define LOPT_IGNORE_ADDR   338
+#define LOPT_MINCTTL       339
+#define LOPT_DHCP_INOTIFY  340
+#define LOPT_DHOPT_INOTIFY 341
+#define LOPT_HOST_INOTIFY  342
+#define LOPT_DNSSEC_STAMP  343
+#define LOPT_TFTP_NO_FAIL  344
 
 #ifdef HAVE_GETOPT_LONG
 static const struct option opts[] =  
@@ -158,7 +166,7 @@ static const struct myoption opts[] =
     { "no-poll", 0, 0, 'n' },
     { "help", 0, 0, 'w' },
     { "no-daemon", 0, 0, 'd' },
-    { "log-queries", 0, 0, 'q' },
+    { "log-queries", 2, 0, 'q' },
     { "user", 2, 0, 'u' },
     { "group", 2, 0, 'g' },
     { "resolv-file", 2, 0, 'r' },
@@ -180,6 +188,7 @@ static const struct myoption opts[] =
     { "local-service", 0, 0, LOPT_LOCAL_SERVICE },
     { "bogus-priv", 0, 0, 'b' },
     { "bogus-nxdomain", 1, 0, 'B' },
+    { "ignore-address", 1, 0, LOPT_IGNORE_ADDR },
     { "selfmx", 0, 0, 'e' },
     { "filterwin2k", 0, 0, 'f' },
     { "pid-file", 2, 0, 'x' },
@@ -195,6 +204,7 @@ static const struct myoption opts[] =
     { "local-ttl", 1, 0, 'T' },
     { "no-negcache", 0, 0, 'N' },
     { "addn-hosts", 1, 0, 'H' },
+    { "hostsdir", 1, 0, LOPT_HOST_INOTIFY },
     { "query-port", 1, 0, 'Q' },
     { "except-interface", 1, 0, 'I' },
     { "no-dhcp-interface", 1, 0, '2' },
@@ -226,6 +236,7 @@ static const struct myoption opts[] =
     { "dhcp-ignore-names", 2, 0, LOPT_NO_NAMES },
     { "enable-tftp", 2, 0, LOPT_TFTP },
     { "tftp-secure", 0, 0, LOPT_SECURE },
+    { "tftp-no-fail", 0, 0, LOPT_TFTP_NO_FAIL },
     { "tftp-unique-root", 0, 0, LOPT_APREF },
     { "tftp-root", 1, 0, LOPT_PREFIX },
     { "tftp-max", 1, 0, LOPT_TFTP_MAX },
@@ -243,6 +254,8 @@ static const struct myoption opts[] =
     { "interface-name", 1, 0, LOPT_INTNAME },
     { "dhcp-hostsfile", 1, 0, LOPT_DHCP_HOST },
     { "dhcp-optsfile", 1, 0, LOPT_DHCP_OPTS },
+    { "dhcp-hostsdir", 1, 0, LOPT_DHCP_INOTIFY },
+    { "dhcp-optsdir", 1, 0, LOPT_DHOPT_INOTIFY },
     { "dhcp-no-override", 0, 0, LOPT_OVERRIDE },
     { "tftp-port-range", 1, 0, LOPT_TFTPPORTS },
     { "stop-dns-rebind", 0, 0, LOPT_REBIND },
@@ -252,6 +265,7 @@ static const struct myoption opts[] =
     { "dhcp-broadcast", 2, 0, LOPT_BROADCAST },
     { "neg-ttl", 1, 0, LOPT_NEGTTL },
     { "max-ttl", 1, 0, LOPT_MAXTTL },
+    { "min-cache-ttl", 1, 0, LOPT_MINCTTL },
     { "max-cache-ttl", 1, 0, LOPT_MAXCTTL },
     { "dhcp-alternate-port", 2, 0, LOPT_ALTPORT },
     { "dhcp-scriptuser", 1, 0, LOPT_SCRIPTUSR },
@@ -289,6 +303,7 @@ static const struct myoption opts[] =
     { "dnssec-debug", 0, 0, LOPT_DNSSEC_DEBUG },
     { "dnssec-check-unsigned", 0, 0, LOPT_DNSSEC_CHECK },
     { "dnssec-no-timecheck", 0, 0, LOPT_DNSSEC_TIME },
+    { "dnssec-timestamp", 1, 0, LOPT_DNSSEC_STAMP },
 #ifdef OPTION6_PREFIX_CLASS 
     { "dhcp-prefix-class", 1, 0, LOPT_PREF_CLSS },
 #endif
@@ -297,6 +312,7 @@ static const struct myoption opts[] =
     { "quiet-dhcp", 0, 0, LOPT_QUIET_DHCP },
     { "quiet-dhcp6", 0, 0, LOPT_QUIET_DHCP6 },
     { "quiet-ra", 0, 0, LOPT_QUIET_RA },
+    { "dns-loop-detect", 0, 0, LOPT_LOOP_DETECT },
     { NULL, 0, 0, 0 }
   };
 
@@ -329,9 +345,12 @@ static struct {
   { 'G', ARG_DUP, "<hostspec>", gettext_noop("Set address or hostname for a specified machine."), NULL },
   { LOPT_DHCP_HOST, ARG_DUP, "<path>", gettext_noop("Read DHCP host specs from file."), NULL },
   { LOPT_DHCP_OPTS, ARG_DUP, "<path>", gettext_noop("Read DHCP option specs from file."), NULL },
+  { LOPT_DHCP_INOTIFY, ARG_DUP, "<path>", gettext_noop("Read DHCP host specs from a directory."), NULL }, 
+  { LOPT_DHOPT_INOTIFY, ARG_DUP, "<path>", gettext_noop("Read DHCP options from a directory."), NULL }, 
   { LOPT_TAG_IF, ARG_DUP, "tag-expression", gettext_noop("Evaluate conditional tag expression."), NULL },
   { 'h', OPT_NO_HOSTS, NULL, gettext_noop("Do NOT load %s file."), HOSTSFILE },
   { 'H', ARG_DUP, "<path>", gettext_noop("Specify a hosts file to be read in addition to %s."), HOSTSFILE },
+  { LOPT_HOST_INOTIFY, ARG_DUP, "<path>", gettext_noop("Read hosts files from a directory."), NULL },
   { 'i', ARG_DUP, "<interface>", gettext_noop("Specify interface(s) to listen on."), NULL },
   { 'I', ARG_DUP, "<interface>", gettext_noop("Specify interface(s) NOT to listen on.") , NULL },
   { 'j', ARG_DUP, "set:<tag>,<class>", gettext_noop("Map DHCP user class to tag."), NULL },
@@ -353,7 +372,7 @@ static struct {
   { LOPT_FORCE, ARG_DUP, "<optspec>", gettext_noop("DHCP option sent even if the client does not request it."), NULL},
   { 'p', ARG_ONE, "<integer>", gettext_noop("Specify port to listen for DNS requests on (defaults to 53)."), NULL },
   { 'P', ARG_ONE, "<integer>", gettext_noop("Maximum supported UDP packet size for EDNS.0 (defaults to %s)."), "*" },
-  { 'q', OPT_LOG, NULL, gettext_noop("Log DNS queries."), NULL },
+  { 'q', ARG_DUP, NULL, gettext_noop("Log DNS queries."), NULL },
   { 'Q', ARG_ONE, "<integer>", gettext_noop("Force the originating port for upstream DNS queries."), NULL },
   { 'R', OPT_NO_RESOLV, NULL, gettext_noop("Do NOT read resolv.conf."), NULL },
   { 'r', ARG_DUP, "<path>", gettext_noop("Specify path to resolv.conf (defaults to %s)."), RESOLVFILE }, 
@@ -366,6 +385,8 @@ static struct {
   { 'T', ARG_ONE, "<integer>", gettext_noop("Specify time-to-live in seconds for replies from /etc/hosts."), NULL },
   { LOPT_NEGTTL, ARG_ONE, "<integer>", gettext_noop("Specify time-to-live in seconds for negative caching."), NULL },
   { LOPT_MAXTTL, ARG_ONE, "<integer>", gettext_noop("Specify time-to-live in seconds for maximum TTL to send to clients."), NULL },
+  { LOPT_MAXCTTL, ARG_ONE, "<integer>", gettext_noop("Specify time-to-live ceiling for cache."), NULL },
+  { LOPT_MINCTTL, ARG_ONE, "<integer>", gettext_noop("Specify time-to-live floor for cache."), NULL },
   { 'u', ARG_ONE, "<username>", gettext_noop("Change to this user after startup. (defaults to %s)."), CHUSER }, 
   { 'U', ARG_DUP, "set:<tag>,<class>", gettext_noop("Map DHCP vendor class to tag."), NULL },
   { 'v', 0, NULL, gettext_noop("Display dnsmasq version and copyright information."), NULL },
@@ -400,6 +421,7 @@ static struct {
   { LOPT_PREFIX, ARG_DUP, "<dir>[,<iface>]", gettext_noop("Export files by TFTP only from the specified subtree."), NULL },
   { LOPT_APREF, OPT_TFTP_APREF, NULL, gettext_noop("Add client IP address to tftp-root."), NULL },
   { LOPT_SECURE, OPT_TFTP_SECURE, NULL, gettext_noop("Allow access only to files owned by the user running dnsmasq."), NULL },
+  { LOPT_TFTP_NO_FAIL, OPT_TFTP_NO_FAIL, NULL, gettext_noop("Do not terminate the service if TFTP directories are inaccessible."), NULL },
   { LOPT_TFTP_MAX, ARG_ONE, "<integer>", gettext_noop("Maximum number of conncurrent TFTP transfers (defaults to %s)."), "#" },
   { LOPT_NOBLOCK, OPT_TFTP_NOBLOCK, NULL, gettext_noop("Disable the TFTP blocksize extension."), NULL },
   { LOPT_TFTP_LC, OPT_TFTP_LC, NULL, gettext_noop("Convert TFTP filenames to lowercase"), NULL },
@@ -446,6 +468,7 @@ static struct {
   { LOPT_DNSSEC_DEBUG, OPT_DNSSEC_DEBUG, NULL, gettext_noop("Disable upstream checking for DNSSEC debugging."), NULL },
   { LOPT_DNSSEC_CHECK, OPT_DNSSEC_NO_SIGN, NULL, gettext_noop("Ensure answers without DNSSEC are in unsigned zones."), NULL },
   { LOPT_DNSSEC_TIME, OPT_DNSSEC_TIME, NULL, gettext_noop("Don't check DNSSEC signature timestamps until first cache-reload"), NULL },
+  { LOPT_DNSSEC_STAMP, ARG_ONE, "<path>", gettext_noop("Timestamp file to verify system clock for DNSSEC"), NULL },
 #ifdef OPTION6_PREFIX_CLASS 
   { LOPT_PREF_CLSS, ARG_DUP, "set:tag,<class>", gettext_noop("Specify DHCPv6 prefix class"), NULL },
 #endif
@@ -454,6 +477,8 @@ static struct {
   { LOPT_QUIET_DHCP6, OPT_QUIET_DHCP6, NULL, gettext_noop("Do not log routine DHCPv6."), NULL },
   { LOPT_QUIET_RA, OPT_QUIET_RA, NULL, gettext_noop("Do not log RA."), NULL },
   { LOPT_LOCAL_SERVICE, OPT_LOCAL_SERVICE, NULL, gettext_noop("Accept queries only from directly-connected networks"), NULL },
+  { LOPT_LOOP_DETECT, OPT_LOOP_DETECT, NULL, gettext_noop("Detect and remove DNS forwarding loops"), NULL },
+  { LOPT_IGNORE_ADDR, ARG_DUP, "<ipaddr>", gettext_noop("Ignore DNS responses containing ipaddr."), NULL }, 
   { 0, 0, NULL, NULL, NULL }
 }; 
 
@@ -1462,7 +1487,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	struct list {
 	  char *suffix;
 	  struct list *next;
-	} *ignore_suffix = NULL, *li;
+	} *ignore_suffix = NULL, *match_suffix = NULL, *li;
 	
 	comma = split(arg);
 	if (!(directory = opt_string_alloc(arg)))
@@ -1471,12 +1496,25 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	for (arg = comma; arg; arg = comma) 
 	  {
 	    comma = split(arg);
-	    li = opt_malloc(sizeof(struct list));
+	    if (strlen(arg) != 0)
-	    li->next = ignore_suffix;
+	      {
-	    ignore_suffix = li;
+		li = opt_malloc(sizeof(struct list));
-	    /* Have to copy: buffer is overwritten */
+		if (*arg == '*')
-	    li->suffix = opt_string_alloc(arg);
+		  {
-	  };
+		    li->next = match_suffix;
+		    match_suffix = li;
+		    /* Have to copy: buffer is overwritten */
+		    li->suffix = opt_string_alloc(arg+1);
+		  }
+		else
+		  {
+		    li->next = ignore_suffix;
+		    ignore_suffix = li;
+		    /* Have to copy: buffer is overwritten */
+		    li->suffix = opt_string_alloc(arg);
+		  }
+	      }
+	  }
 	
 	if (!(dir_stream = opendir(directory)))
 	  die(_("cannot access directory %s: %s"), directory, EC_FILE);
@@ -1493,6 +1531,20 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 		ent->d_name[0] == '.')
 	      continue;
 
+	    if (match_suffix)
+	      {
+		for (li = match_suffix; li; li = li->next)
+		  {
+		    /* check for required suffices */
+		    size_t ls = strlen(li->suffix);
+		    if (len > ls &&
+			strcmp(li->suffix, &ent->d_name[len - ls]) == 0)
+		      break;
+		  }
+		if (!li)
+		  continue;
+	      }
+	    
 	    for (li = ignore_suffix; li; li = li->next)
 	      {
 		/* check for proscribed suffices */
@@ -1528,7 +1580,12 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	    free(ignore_suffix->suffix);
 	    free(ignore_suffix);
 	  }
-	      
+	for(; match_suffix; match_suffix = li)
+	  {
+	    li = match_suffix->next;
+	    free(match_suffix->suffix);
+	    free(match_suffix);
+	  }    
 	break;
       }
 
@@ -1667,9 +1724,12 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       break;
 #endif /* HAVE_DHCP */
 
-    case LOPT_DHCP_HOST: /* --dhcp-hostfile */
+    case LOPT_DHCP_HOST:     /* --dhcp-hostsfile */
-    case LOPT_DHCP_OPTS: /* --dhcp-optsfile */
+    case LOPT_DHCP_OPTS:     /* --dhcp-optsfile */
-    case 'H': /* --addn-hosts */
+    case LOPT_DHCP_INOTIFY:  /* --dhcp-hostsdir */
+    case LOPT_DHOPT_INOTIFY: /* --dhcp-optsdir */
+    case LOPT_HOST_INOTIFY:  /* --hostsdir */
+    case 'H':                /* --addn-hosts */
       {
 	struct hostsfile *new = opt_malloc(sizeof(struct hostsfile));
 	static unsigned int hosts_index = SRC_AH;
@@ -1691,6 +1751,18 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	    new->next = daemon->dhcp_opts_file;
 	    daemon->dhcp_opts_file = new;
 	  } 	  
+	else 
+	  {
+	    new->next = daemon->dynamic_dirs;
+	    daemon->dynamic_dirs = new; 
+	    if (option == LOPT_DHCP_INOTIFY)
+	      new->flags |= AH_DHCP_HST;
+	    else if (option == LOPT_DHOPT_INOTIFY)
+	      new->flags |= AH_DHCP_OPT;
+	    else if (option == LOPT_HOST_INOTIFY)
+	      new->flags |= AH_HOSTS;
+	  }
+	
 	break;
       }
       
@@ -1906,10 +1978,17 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 			      else
 				{
 				   /* generate the equivalent of
-				      local=/<domain>/
 				      local=/xxx.yyy.zzz.in-addr.arpa/ */
 				  struct server *serv = add_rev4(new->start, msize);
 				  serv->flags |= SERV_NO_ADDR;
+
+				  /* local=/<domain>/ */
+				  serv = opt_malloc(sizeof(struct server));
+				  memset(serv, 0, sizeof(struct server));
+				  serv->domain = d;
+				  serv->flags = SERV_HAS_DOMAIN | SERV_NO_ADDR;
+				  serv->next = daemon->servers;
+				  daemon->servers = serv;
 				}
 			    }
 			}
@@ -1943,10 +2022,17 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 			      else 
 				{
 				  /* generate the equivalent of
-				     local=/<domain>/
 				     local=/xxx.yyy.zzz.ip6.arpa/ */
 				  struct server *serv = add_rev6(&new->start6, msize);
 				  serv->flags |= SERV_NO_ADDR;
+				  
+				  /* local=/<domain>/ */
+				  serv = opt_malloc(sizeof(struct server));
+				  memset(serv, 0, sizeof(struct server));
+				  serv->domain = d;
+				  serv->flags = SERV_HAS_DOMAIN | SERV_NO_ADDR;
+				  serv->next = daemon->servers;
+				  daemon->servers = serv;
 				}
 			    }
 			}
@@ -2070,14 +2156,23 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       break;
       
     case 'B':  /* --bogus-nxdomain */
-      {
+    case LOPT_IGNORE_ADDR: /* --ignore-address */
+     {
 	struct in_addr addr;
 	unhide_metas(arg);
 	if (arg && (inet_pton(AF_INET, arg, &addr) > 0))
 	  {
 	    struct bogus_addr *baddr = opt_malloc(sizeof(struct bogus_addr));
-	    baddr->next = daemon->bogus_addr;
+	    if (option == 'B')
-	    daemon->bogus_addr = baddr;
+	      {
+		baddr->next = daemon->bogus_addr;
+		daemon->bogus_addr = baddr;
+	      }
+	    else
+	      {
+		baddr->next = daemon->ignore_addr;
+		daemon->ignore_addr = baddr;
+	      }
 	    baddr->addr = addr;
 	  }
 	else
@@ -2171,6 +2266,9 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	  {
 	    newlist = opt_malloc(sizeof(struct server));
 	    memset(newlist, 0, sizeof(struct server));
+#ifdef HAVE_LOOP
+	    newlist->uid = rand32();
+#endif
 	  }
 	
 	if (servers_only && option == 'S')
@@ -2189,8 +2287,6 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	  {
 	    if (!(newlist->flags & SERV_NO_REBIND))
 	      newlist->flags |= SERV_NO_ADDR; /* no server */
-	    if (newlist->flags & SERV_LITERAL_ADDRESS)
-	      ret_err(gen_err);
 	  }
 
 	else if (strcmp(arg, "#") == 0)
@@ -2357,6 +2453,12 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	ret_err(gen_err);
       break;  
     
+    case 'q': /* --log-queries */
+      set_option_bool(OPT_LOG);
+      if (arg && strcmp(arg, "extra") == 0)
+	set_option_bool(OPT_EXTRALOG);
+      break;
+
     case LOPT_MAX_LOGS:  /* --log-async */
       daemon->max_logs = LOG_MAX; /* default */
       if (arg && !atoi_check(arg, &daemon->max_logs))
@@ -2386,6 +2488,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
     case 'T':         /* --local-ttl */
     case LOPT_NEGTTL: /* --neg-ttl */
     case LOPT_MAXTTL: /* --max-ttl */
+    case LOPT_MINCTTL: /* --min-cache-ttl */
     case LOPT_MAXCTTL: /* --max-cache-ttl */
     case LOPT_AUTHTTL: /* --auth-ttl */
       {
@@ -2396,6 +2499,12 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	  daemon->neg_ttl = (unsigned long)ttl;
 	else if (option == LOPT_MAXTTL)
 	  daemon->max_ttl = (unsigned long)ttl;
+	else if (option == LOPT_MINCTTL)
+	  {
+	    if (ttl > TTL_FLOOR_LIMIT)
+	      ttl = TTL_FLOOR_LIMIT;
+	    daemon->min_cache_ttl = (unsigned long)ttl;
+	  }
 	else if (option == LOPT_MAXCTTL)
 	  daemon->max_cache_ttl = (unsigned long)ttl;
 	else if (option == LOPT_AUTHTTL)
@@ -2590,6 +2699,8 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 		  new->flags |= CONTEXT_RA_ROUTER | CONTEXT_RA;
 		else if (strcmp(a[leasepos], "ra-stateless") == 0)
 		  new->flags |= CONTEXT_RA_STATELESS | CONTEXT_DHCP | CONTEXT_RA;
+		else if (strcmp(a[leasepos], "off-link") == 0)
+		  new->flags |= CONTEXT_RA_OFF_LINK;
 		else if (leasepos == 1 && inet_pton(AF_INET6, a[leasepos], &new->end6))
 		  new->flags |= CONTEXT_DHCP; 
 		else if (strstr(a[leasepos], "constructor:") == a[leasepos])
@@ -3762,6 +3873,10 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       }
 
 #ifdef HAVE_DNSSEC
+    case LOPT_DNSSEC_STAMP:
+      daemon->timestamp_file = opt_string_alloc(arg); 
+      break;
+
     case LOPT_TRUST_ANCHOR:
       {
 	struct ds_config *new = opt_malloc(sizeof(struct ds_config));
@@ -3960,6 +4075,20 @@ static void read_file(char *file, FILE *f, int hard_opt)
   fclose(f);
 }
 
+#ifdef HAVE_DHCP
+int option_read_dynfile(char *file, int flags)
+{
+  my_syslog(MS_DHCP | LOG_INFO, _("read %s"), file);
+  
+  if (flags & AH_DHCP_HST)
+    return one_file(file, LOPT_BANK);
+  else if (flags & AH_DHCP_OPT)
+    return one_file(file, LOPT_OPTS);
+  
+  return 0;
+}
+#endif
+
 static int one_file(char *file, int hard_opt)
 {
   FILE *f;
@@ -4057,7 +4186,7 @@ struct hostsfile *expand_filelist(struct hostsfile *list)
 	    
 	    /* don't read this as a file */
 	    ah->flags |= AH_INACTIVE;
-
+	    
 	    if (!(dir_stream = opendir(ah->fname)))
 	      my_syslog(LOG_ERR, _("cannot access directory %s: %s"), 
 			ah->fname, strerror(errno));
@@ -4269,6 +4398,7 @@ void read_opts(int argc, char **argv, char *compile_opts)
   daemon->soa_refresh = SOA_REFRESH;
   daemon->soa_retry = SOA_RETRY;
   daemon->soa_expiry = SOA_EXPIRY;
+
   add_txt("version.bind", "dnsmasq-" VERSION, 0 );
   add_txt("authors.bind", "Simon Kelley", 0);
   add_txt("copyright.bind", COPYRIGHT, 0);
@@ -4356,22 +4486,30 @@ void read_opts(int argc, char **argv, char *compile_opts)
     }
 
   if (conffile)
-    one_file(conffile, conffile_opt);
+    {
+      one_file(conffile, conffile_opt);
+      if (conffile_opt == 0)
+	free(conffile);
+    }
 
   /* port might not be known when the address is parsed - fill in here */
   if (daemon->servers)
     {
       struct server *tmp;
       for (tmp = daemon->servers; tmp; tmp = tmp->next)
-	if (!(tmp->flags & SERV_HAS_SOURCE))
+	{
-	  {
+	  tmp->edns_pktsz = daemon->edns_pktsz;
-	    if (tmp->source_addr.sa.sa_family == AF_INET)
+	 
-	      tmp->source_addr.in.sin_port = htons(daemon->query_port);
+	  if (!(tmp->flags & SERV_HAS_SOURCE))
+	    {
+	      if (tmp->source_addr.sa.sa_family == AF_INET)
+		tmp->source_addr.in.sin_port = htons(daemon->query_port);
 #ifdef HAVE_IPV6
-	    else if (tmp->source_addr.sa.sa_family == AF_INET6)
+	      else if (tmp->source_addr.sa.sa_family == AF_INET6)
-	      tmp->source_addr.in6.sin6_port = htons(daemon->query_port);
+		tmp->source_addr.in6.sin6_port = htons(daemon->query_port);
 #endif 
-	  } 
+	    }
+	} 
     }
   
   if (daemon->if_addrs)

src/outpacket.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/poll.c

@@ -0,0 +1,124 @@
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+
+/* Wrapper for poll(). Allocates and extends array of struct pollfds,
+   keeps them in fd order so that we can set and test conditions on
+   fd using a simple but efficient binary chop. */
+
+/* poll_reset()
+   poll_listen(fd, event)
+   .
+   .
+   poll_listen(fd, event);
+
+   hits = do_poll(timeout);
+
+   if (poll_check(fd, event)
+    .
+    .
+
+   if (poll_check(fd, event)
+    .
+    .
+
+    event is OR of POLLIN, POLLOUT, POLLERR, etc
+*/
+
+static struct pollfd *pollfds = NULL;
+static nfds_t nfds, arrsize = 0;
+
+/* Binary search. Returns either the pollfd with fd, or
+   if the fd doesn't match, or return equals nfds, the entry
+   to the left of which a new record should be inserted. */
+static nfds_t fd_search(int fd)
+{
+  nfds_t left, right, mid;
+  
+  if ((right = nfds) == 0)
+    return 0;
+  
+  left = 0;
+  
+  while (1)
+    {
+      if (right == left + 1)
+	return (pollfds[left].fd >= fd) ? left : right;
+      
+      mid = (left + right)/2;
+      
+      if (pollfds[mid].fd > fd)
+	right = mid;
+      else 
+	left = mid;
+    }
+}
+
+void poll_reset(void)
+{
+  nfds = 0;
+}
+
+int do_poll(int timeout)
+{
+  return poll(pollfds, nfds, timeout);
+}
+
+int poll_check(int fd, short event)
+{
+  nfds_t i = fd_search(fd);
+  
+  if (i < nfds && pollfds[i].fd == fd)
+    return pollfds[i].revents & event;
+
+  return 0;
+}
+
+void poll_listen(int fd, short event)
+{
+   nfds_t i = fd_search(fd);
+  
+   if (i < nfds && pollfds[i].fd == fd)
+     pollfds[i].events |= event;
+   else
+     {
+       if (arrsize != nfds)
+	 memmove(&pollfds[i+1], &pollfds[i], (nfds - i) * sizeof(struct pollfd));
+       else
+	 {
+	   /* Array too small, extend. */
+	   struct pollfd *new;
+	   arrsize += 64;
+	   
+	   if (!(new = whine_malloc(arrsize * sizeof(struct pollfd))))
+	     return;
+
+	   if (pollfds)
+	     {
+	       memcpy(new, pollfds, i * sizeof(struct pollfd));
+	       memcpy(&new[i+1], &pollfds[i], (nfds - i) * sizeof(struct pollfd));
+	       free(pollfds);
+	     }
+	   
+	   pollfds = new;
+	 }
+       
+       pollfds[i].fd = fd;
+       pollfds[i].events = event;
+       nfds++;
+     }
+}

src/radv-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -50,6 +50,7 @@ struct prefix_opt {
 #define ICMP6_OPT_PREFIX       3
 #define ICMP6_OPT_MTU          5
 #define ICMP6_OPT_ADV_INTERVAL 7
+#define ICMP6_OPT_RT_INFO     24
 #define ICMP6_OPT_RDNSS       25
 #define ICMP6_OPT_DNSSL       31
 

src/radv.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@ struct ra_param {
   char *if_name;
   struct dhcp_netid *tags;
   struct in6_addr link_local, link_global, ula;
-  unsigned int glob_pref_time, link_pref_time, ula_pref_time, adv_interval;
+  unsigned int glob_pref_time, link_pref_time, ula_pref_time, adv_interval, prio;
 };
 
 struct search_param {
@@ -40,7 +40,18 @@ struct search_param {
   char name[IF_NAMESIZE+1];
 };
 
+struct alias_param {
+  int iface;
+  struct dhcp_bridge *bridge;
+  int num_alias_ifs;
+  int max_alias_ifs;
+  int *alias_ifs;
+};
+
 static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest);
+static void send_ra_alias(time_t now, int iface, char *iface_name, struct in6_addr *dest,
+                    int send_iface);
+static int send_ra_to_aliases(int index, unsigned int type, char *mac, size_t maclen, void *parm);
 static int add_prefixes(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
 			unsigned int preferred, unsigned int valid, void *vparam);
@@ -181,6 +192,7 @@ void icmp6_packet(time_t now)
   else if (packet[0] == ND_ROUTER_SOLICIT)
     {
       char *mac = "";
+      struct dhcp_bridge *bridge, *alias;
       
       /* look for link-layer address option for logging */
       if (sz >= 16 && packet[8] == ICMP6_OPT_SOURCE_MAC && (packet[9] * 8) + 8 <= sz)
@@ -191,12 +203,37 @@ void icmp6_packet(time_t now)
          
       if (!option_bool(OPT_QUIET_RA))
 	my_syslog(MS_DHCP | LOG_INFO, "RTR-SOLICIT(%s) %s", interface, mac);
-      /* source address may not be valid in solicit request. */
+
-      send_ra(now, if_index, interface, !IN6_IS_ADDR_UNSPECIFIED(&from.sin6_addr) ? &from.sin6_addr : NULL);
+      /* If the incoming interface is an alias of some other one (as
+         specified by the --bridge-interface option), send an RA using
+         the context of the aliased interface. */
+      for (bridge = daemon->bridges; bridge; bridge = bridge->next)
+        {
+          int bridge_index = if_nametoindex(bridge->iface);
+          if (bridge_index)
+	    {
+	      for (alias = bridge->alias; alias; alias = alias->next)
+		if (wildcard_matchn(alias->iface, interface, IF_NAMESIZE))
+		  {
+		    /* Send an RA on if_index with information from
+		       bridge_index. */
+		    send_ra_alias(now, bridge_index, bridge->iface, NULL, if_index);
+		    break;
+		  }
+	      if (alias)
+		break;
+	    }
+        }
+
+      /* If the incoming interface wasn't an alias, send an RA using
+	 the context of the incoming interface. */
+      if (!bridge)
+	/* source address may not be valid in solicit request. */
+	send_ra(now, if_index, interface, !IN6_IS_ADDR_UNSPECIFIED(&from.sin6_addr) ? &from.sin6_addr : NULL);
     }
 }
 
-static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest)
+static void send_ra_alias(time_t now, int iface, char *iface_name, struct in6_addr *dest, int send_iface)
 {
   struct ra_packet *ra;
   struct ra_param parm;
@@ -210,18 +247,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 #ifdef HAVE_LINUX_NETWORK
   FILE *f;
 #endif
- 
-  save_counter(0);
-  ra = expand(sizeof(struct ra_packet));
   
-  ra->type = ND_ROUTER_ADVERT;
-  ra->code = 0;
-  ra->hop_limit = hop_limit;
-  ra->flags = calc_prio(ra_param);
-  ra->lifetime = htons(calc_lifetime(ra_param));
-  ra->reachable_time = 0;
-  ra->retrans_time = 0;
-
   parm.ind = iface;
   parm.managed = 0;
   parm.other = 0;
@@ -232,7 +258,19 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
   parm.now = now;
   parm.glob_pref_time = parm.link_pref_time = parm.ula_pref_time = 0;
   parm.adv_interval = calc_interval(ra_param);
+  parm.prio = calc_prio(ra_param);
   
+  save_counter(0);
+  ra = expand(sizeof(struct ra_packet));
+  
+  ra->type = ND_ROUTER_ADVERT;
+  ra->code = 0;
+  ra->hop_limit = hop_limit;
+  ra->flags = parm.prio;
+  ra->lifetime = htons(calc_lifetime(ra_param));
+  ra->reachable_time = 0;
+  ra->retrans_time = 0;
+
   /* set tag with name == interface */
   iface_id.net = iface_name;
   iface_id.next = NULL;
@@ -312,8 +350,10 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 		  opt->type = ICMP6_OPT_PREFIX;
 		  opt->len = 4;
 		  opt->prefix_len = context->prefix;
-		  /* autonomous only if we're not doing dhcp, always set "on-link" */
+		  /* autonomous only if we're not doing dhcp, set
-		  opt->flags = do_slaac ? 0xC0 : 0x80;
+                     "on-link" unless "off-link" was specified */
+		  opt->flags = (do_slaac ? 0x40 : 0) |
+                    ((context->flags & CONTEXT_RA_OFF_LINK) ? 0 : 0x80);
 		  opt->valid_lifetime = htonl(context->saved_valid - old);
 		  opt->preferred_lifetime = htonl(0);
 		  opt->reserved = 0; 
@@ -367,7 +407,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
     }
 #endif
      
-  iface_enumerate(AF_LOCAL, &iface, add_lla);
+  iface_enumerate(AF_LOCAL, &send_iface, add_lla);
  
   /* RDNSS, RFC 6106, use relevant DHCP6 options */
   (void)option_filter(parm.tags, NULL, daemon->dhcp_opts6);
@@ -475,14 +515,22 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
   else
     {
       inet_pton(AF_INET6, ALL_NODES, &addr.sin6_addr); 
-      setsockopt(daemon->icmp6fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &iface, sizeof(iface));
+      setsockopt(daemon->icmp6fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &send_iface, sizeof(send_iface));
     }
   
-  while (sendto(daemon->icmp6fd, daemon->outpacket.iov_base, save_counter(0), 0, 
+  while (retry_send(sendto(daemon->icmp6fd, daemon->outpacket.iov_base, 
-		(struct sockaddr *)&addr, sizeof(addr)) == -1 && retry_send());
+			   save_counter(0), 0, (struct sockaddr *)&addr, 
+			   sizeof(addr))));
   
 }
 
+static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest)
+{
+  /* Send an RA on the same interface that the RA content is based
+     on. */
+  send_ra_alias(now, iface, iface_name, dest, iface);
+}
+
 static int add_prefixes(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
 			unsigned int preferred, unsigned int valid, void *vparam)
@@ -512,6 +560,7 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 	  int deprecate  = 0;
 	  int constructed = 0;
 	  int adv_router = 0;
+	  int off_link = 0;
 	  unsigned int time = 0xffffffff;
 	  struct dhcp_context *context;
 	  
@@ -584,6 +633,7 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 		      context->ra_time = 0;
 		    context->flags |= CONTEXT_RA_DONE;
 		    real_prefix = context->prefix;
+                    off_link = (context->flags & CONTEXT_RA_OFF_LINK);
 		  }
 
 		param->first = 0;	
@@ -634,8 +684,9 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 		  opt->type = ICMP6_OPT_PREFIX;
 		  opt->len = 4;
 		  opt->prefix_len = real_prefix;
-		  /* autonomous only if we're not doing dhcp, always set "on-link" */
+		  /* autonomous only if we're not doing dhcp, set
-		  opt->flags = 0x80;
+                     "on-link" unless "off-link" was specified */
+		  opt->flags = (off_link ? 0 : 0x80);
 		  if (do_slaac)
 		    opt->flags |= 0x40;
 		  if (adv_router)
@@ -681,6 +732,7 @@ time_t periodic_ra(time_t now)
   struct search_param param;
   struct dhcp_context *context;
   time_t next_event;
+  struct alias_param aparam;
     
   param.now = now;
   param.iface = 0;
@@ -728,12 +780,84 @@ time_t periodic_ra(time_t now)
 	    if (tmp->name && wildcard_match(tmp->name, param.name))
 	      break;
 	  if (!tmp)
-	    send_ra(now, param.iface, param.name, NULL); 
+            {
+              send_ra(now, param.iface, param.name, NULL); 
+
+              /* Also send on all interfaces that are aliases of this
+                 one. */
+              for (aparam.bridge = daemon->bridges;
+                   aparam.bridge;
+                   aparam.bridge = aparam.bridge->next)
+                if ((int)if_nametoindex(aparam.bridge->iface) == param.iface)
+                  {
+                    /* Count the number of alias interfaces for this
+                       'bridge', by calling iface_enumerate with
+                       send_ra_to_aliases and NULL alias_ifs. */
+                    aparam.iface = param.iface;
+                    aparam.alias_ifs = NULL;
+                    aparam.num_alias_ifs = 0;
+                    iface_enumerate(AF_LOCAL, &aparam, send_ra_to_aliases);
+                    my_syslog(MS_DHCP | LOG_INFO, "RTR-ADVERT(%s) %s => %d alias(es)",
+                              param.name, daemon->addrbuff, aparam.num_alias_ifs);
+
+                    /* Allocate memory to store the alias interface
+                       indices. */
+                    aparam.alias_ifs = (int *)whine_malloc(aparam.num_alias_ifs *
+                                                           sizeof(int));
+                    if (aparam.alias_ifs)
+                      {
+                        /* Use iface_enumerate again to get the alias
+                           interface indices, then send on each of
+                           those. */
+                        aparam.max_alias_ifs = aparam.num_alias_ifs;
+                        aparam.num_alias_ifs = 0;
+                        iface_enumerate(AF_LOCAL, &aparam, send_ra_to_aliases);
+                        for (; aparam.num_alias_ifs; aparam.num_alias_ifs--)
+                          {
+                            my_syslog(MS_DHCP | LOG_INFO, "RTR-ADVERT(%s) %s => i/f %d",
+                                      param.name, daemon->addrbuff,
+                                      aparam.alias_ifs[aparam.num_alias_ifs - 1]);
+                            send_ra_alias(now,
+                                          param.iface,
+                                          param.name,
+                                          NULL,
+                                          aparam.alias_ifs[aparam.num_alias_ifs - 1]);
+                          }
+                        free(aparam.alias_ifs);
+                      }
+
+                    /* The source interface can only appear in at most
+                       one --bridge-interface. */
+                    break;
+                  }
+            }
 	}
     }      
   return next_event;
 }
-  
+
+static int send_ra_to_aliases(int index, unsigned int type, char *mac, size_t maclen, void *parm)
+{
+  struct alias_param *aparam = (struct alias_param *)parm;
+  char ifrn_name[IFNAMSIZ];
+  struct dhcp_bridge *alias;
+
+  (void)type;
+  (void)mac;
+  (void)maclen;
+
+  if (if_indextoname(index, ifrn_name))
+    for (alias = aparam->bridge->alias; alias; alias = alias->next)
+      if (wildcard_matchn(alias->iface, ifrn_name, IFNAMSIZ))
+        {
+          if (aparam->alias_ifs && (aparam->num_alias_ifs < aparam->max_alias_ifs))
+            aparam->alias_ifs[aparam->num_alias_ifs] = index;
+          aparam->num_alias_ifs++;
+        }
+
+  return 1;
+}
+
 static int iface_search(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
 			int preferred, int valid, void *vparam)

src/rfc1035.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -20,7 +20,7 @@ int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 		 char *name, int isExtract, int extrabytes)
 {
   unsigned char *cp = (unsigned char *)name, *p = *pp, *p1 = NULL;
-  unsigned int j, l, hops = 0;
+  unsigned int j, l, namelen = 0, hops = 0;
   int retvalue = 1;
   
   if (isExtract)
@@ -77,49 +77,10 @@ int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 	  
 	  p = l + (unsigned char *)header;
 	}
-      else if (label_type == 0x80)
+      else if (label_type == 0x00)
-	return 0; /* reserved */
-      else if (label_type == 0x40)
-	{ /* ELT */
-	  unsigned int count, digs;
-	  
-	  if ((l & 0x3f) != 1)
-	    return 0; /* we only understand bitstrings */
-
-	  if (!isExtract)
-	    return 0; /* Cannot compare bitsrings */
-	  
-	  count = *p++;
-	  if (count == 0)
-	    count = 256;
-	  digs = ((count-1)>>2)+1;
-	  
-	  /* output is \[x<hex>/siz]. which is digs+9 chars */
-	  if (cp - (unsigned char *)name + digs + 9 >= MAXDNAME)
-	    return 0;
-	  if (!CHECK_LEN(header, p, plen, (count-1)>>3))
-	    return 0;
-
-	  *cp++ = '\\';
-	  *cp++ = '[';
-	  *cp++ = 'x';
-	  for (j=0; j<digs; j++)
-	    {
-	      unsigned int dig;
-	      if (j%2 == 0)
-		dig = *p >> 4;
-	      else
-		dig = *p++ & 0x0f;
-	      
-	      *cp++ = dig < 10 ? dig + '0' : dig + 'A' - 10;
-	    } 
-	  cp += sprintf((char *)cp, "/%d]", count);
-	  /* do this here to overwrite the zero char from sprintf */
-	  *cp++ = '.';
-	}
-      else 
 	{ /* label_type = 0 -> label. */
-	  if (cp - (unsigned char *)name + l + 1 >= MAXDNAME)
+	  namelen += l + 1; /* include period */
+	  if (namelen >= MAXDNAME)
 	    return 0;
 	  if (!CHECK_LEN(header, p, plen, l))
 	    return 0;
@@ -128,8 +89,21 @@ int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 	    if (isExtract)
 	      {
 		unsigned char c = *p;
-		if (isascii(c) && !iscntrl(c) && c != '.')
+#ifdef HAVE_DNSSEC
-		  *cp++ = *p;
+		if (option_bool(OPT_DNSSEC_VALID))
+		  {
+		    if (c == 0 || c == '.' || c == NAME_ESCAPE)
+		      {
+			*cp++ = NAME_ESCAPE;
+			*cp++ = c+1;
+		      }
+		    else
+		      *cp++ = c; 
+		  }
+		else
+#endif
+		if (c != 0 && c != '.')
+		  *cp++ = c;
 		else
 		  return 0;
 	      }
@@ -144,19 +118,26 @@ int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 		    cp++;
 		    if (c1 >= 'A' && c1 <= 'Z')
 		      c1 += 'a' - 'A';
+#ifdef HAVE_DNSSEC
+		    if (option_bool(OPT_DNSSEC_VALID) && c1 == NAME_ESCAPE)
+		      c1 = (*cp++)-1;
+#endif
+		    
 		    if (c2 >= 'A' && c2 <= 'Z')
 		      c2 += 'a' - 'A';
-		    
+		     
 		    if (c1 != c2)
 		      retvalue =  2;
 		  }
 	      }
-	  
+	    
 	  if (isExtract)
 	    *cp++ = '.';
 	  else if (*cp != 0 && *cp++ != '.')
 	    retvalue = 2;
 	}
+      else
+	return 0; /* label types 0x40 and 0x80 not supported */
     }
 }
  
@@ -527,7 +508,7 @@ static size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned
 	return plen;
       *p++ = 0; /* empty name */
       PUTSHORT(T_OPT, p);
-      PUTSHORT(daemon->edns_pktsz, p); /* max packet length */
+      PUTSHORT(SAFE_PKTSZ, p); /* max packet length, this will be overwritten */
       PUTSHORT(0, p);    /* extended RCODE and version */
       PUTSHORT(set_do ? 0x8000 : 0, p); /* DO flag */
       lenp = p;
@@ -1092,10 +1073,23 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 		      memcpy(&addr, p1, addrlen);
 		      
 		      /* check for returned address in private space */
-		      if (check_rebind &&
+		      if (check_rebind)
-			  (flags & F_IPV4) &&
+			{
-			  private_net(addr.addr.addr4, !option_bool(OPT_LOCAL_REBIND)))
+			  if ((flags & F_IPV4) &&
-			return 1;
+			      private_net(addr.addr.addr4, !option_bool(OPT_LOCAL_REBIND)))
+			    return 1;
+			  
+#ifdef HAVE_IPV6
+			  if ((flags & F_IPV6) &&
+			      IN6_IS_ADDR_V4MAPPED(&addr.addr.addr6))
+			    {
+			      struct in_addr v4;
+			      v4.s_addr = ((const uint32_t *) (&addr.addr.addr6))[3];
+			      if (private_net(v4, !option_bool(OPT_LOCAL_REBIND)))
+				return 1;
+			    }
+#endif
+			}
 		      
 #ifdef HAVE_IPSET
 		      if (ipsets && (flags & (F_IPV4 | F_IPV6)))
@@ -1198,7 +1192,10 @@ unsigned int extract_request(struct dns_header *header, size_t qlen, char *name,
 size_t setup_reply(struct dns_header *header, size_t qlen,
 		struct all_addr *addrp, unsigned int flags, unsigned long ttl)
 {
-  unsigned char *p = skip_questions(header, qlen);
+  unsigned char *p;
+
+  if (!(p = skip_questions(header, qlen)))
+    return 0;
   
   /* clear authoritative and truncated flags, set QR flag */
   header->hb3 = (header->hb3 & ~(HB3_AA | HB3_TC)) | HB3_QR;
@@ -1214,7 +1211,7 @@ size_t setup_reply(struct dns_header *header, size_t qlen,
     SET_RCODE(header, NOERROR); /* empty domain */
   else if (flags == F_NXDOMAIN)
     SET_RCODE(header, NXDOMAIN);
-  else if (p && flags == F_IPV4)
+  else if (flags == F_IPV4)
     { /* we know the address */
       SET_RCODE(header, NOERROR);
       header->ancount = htons(1);
@@ -1222,7 +1219,7 @@ size_t setup_reply(struct dns_header *header, size_t qlen,
       add_resource_record(header, NULL, NULL, sizeof(struct dns_header), &p, ttl, NULL, T_A, C_IN, "4", addrp);
     }
 #ifdef HAVE_IPV6
-  else if (p && flags == F_IPV6)
+  else if (flags == F_IPV6)
     {
       SET_RCODE(header, NOERROR);
       header->ancount = htons(1);
@@ -1246,7 +1243,12 @@ int check_for_local_domain(char *name, time_t now)
   struct ptr_record *ptr;
   struct naptr *naptr;
 
-  if ((crecp = cache_find_by_name(NULL, name, now, F_IPV4 | F_IPV6 | F_CNAME | F_DS | F_NO_RR)) &&
+  /* Note: the call to cache_find_by_name is intended to find any record which matches
+     ie A, AAAA, CNAME, DS. Because RRSIG records are marked by setting both F_DS and F_DNSKEY,
+     cache_find_by name ordinarily only returns records with an exact match on those bits (ie
+     for the call below, only DS records). The F_NSIGMATCH bit changes this behaviour */
+
+  if ((crecp = cache_find_by_name(NULL, name, now, F_IPV4 | F_IPV6 | F_CNAME | F_DS | F_NO_RR | F_NSIGMATCH)) &&
       (crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG)))
     return 1;
   
@@ -1323,6 +1325,43 @@ int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
   return 0;
 }
 
+int check_for_ignored_address(struct dns_header *header, size_t qlen, struct bogus_addr *baddr)
+{
+  unsigned char *p;
+  int i, qtype, qclass, rdlen;
+  struct bogus_addr *baddrp;
+
+  /* skip over questions */
+  if (!(p = skip_questions(header, qlen)))
+    return 0; /* bad packet */
+
+  for (i = ntohs(header->ancount); i != 0; i--)
+    {
+      if (!(p = skip_name(p, header, qlen, 10)))
+	return 0; /* bad packet */
+      
+      GETSHORT(qtype, p); 
+      GETSHORT(qclass, p);
+      p += 4; /* TTL */
+      GETSHORT(rdlen, p);
+      
+      if (qclass == C_IN && qtype == T_A)
+	{
+	  if (!CHECK_LEN(header, p, qlen, INADDRSZ))
+	    return 0;
+	  
+	  for (baddrp = baddr; baddrp; baddrp = baddrp->next)
+	    if (memcmp(&baddrp->addr, p, INADDRSZ) == 0)
+	      return 1;
+	}
+      
+      if (!ADD_RDLEN(header, p, qlen, rdlen))
+	return 0;
+    }
+  
+  return 0;
+}
+
 int add_resource_record(struct dns_header *header, char *limit, int *truncp, int nameoffset, unsigned char **pp, 
 			unsigned long ttl, int *offset, unsigned short type, unsigned short class, char *format, ...)
 {
@@ -1467,7 +1506,6 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
   unsigned short flag;
   int q, ans, anscount = 0, addncount = 0;
   int dryrun = 0, sec_reqd = 0, have_pseudoheader = 0;
-  int is_sign;
   struct crec *crecp;
   int nxdomain = 0, auth = 1, trunc = 0, sec_data = 1;
   struct mx_srv_record *rec;
@@ -1487,28 +1525,19 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
      forward rather than answering from the cache, which doesn't include
      security information, unless we're in DNSSEC validation mode. */
 
-  if (find_pseudoheader(header, qlen, NULL, &pheader, &is_sign))
+  if (find_pseudoheader(header, qlen, NULL, &pheader, NULL))
     { 
-      unsigned short udpsz, flags;
+      unsigned short flags;
-      unsigned char *psave = pheader;
+      
-
       have_pseudoheader = 1;
 
-      GETSHORT(udpsz, pheader);
+      pheader += 4; /* udp size, ext_rcode */
-      pheader += 2; /* ext_rcode */
       GETSHORT(flags, pheader);
       
       if ((sec_reqd = flags & 0x8000))
 	*do_bit = 1;/* do bit */ 
+
       *ad_reqd = 1;
-
-      /* If our client is advertising a larger UDP packet size
-	 than we allow, trim it so that we don't get an overlarge
-	 response from upstream */
-
-      if (!is_sign && (udpsz > daemon->edns_pktsz))
-	PUTSHORT(daemon->edns_pktsz, psave); 
-
       dryrun = 1;
     }
 
@@ -1538,6 +1567,11 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
       GETSHORT(qtype, p); 
       GETSHORT(qclass, p);
 
+      /* Don't filter RRSIGS from answers to ANY queries, even if do-bit
+	 not set. */
+      if (qtype == T_ANY)
+	*do_bit = 1;
+
       ans = 0; /* have we answered this question */
       
       if (qtype == T_TXT || qtype == T_ANY)
@@ -1601,7 +1635,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 			      {
 				if (crecp->flags & F_NXDOMAIN)
 				  nxdomain = 1;
-				log_query(F_UPSTREAM, name, NULL, "secure no DS");	
+				log_query(F_UPSTREAM, name, NULL, "no DS");	
 			      }
 			    else if ((keydata = blockdata_retrieve(crecp->addr.ds.keydata, crecp->addr.ds.keylen, NULL)))
 			      {			     			      
@@ -1918,14 +1952,17 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 		  for (intr = daemon->int_names; intr; intr = intr->next)
 		    if (hostname_isequal(name, intr->name))
 		      {
-			ans = 1;
+			for (addrlist = intr->addr; addrlist; addrlist = addrlist->next)
-			if (!dryrun)
-			  {
-			    
-			    for (addrlist = intr->addr; addrlist; addrlist = addrlist->next)
 #ifdef HAVE_IPV6
-			      if (((addrlist->flags & ADDRLIST_IPV6) ? T_AAAA : T_A) == type)
+			  if (((addrlist->flags & ADDRLIST_IPV6) ? T_AAAA : T_A) == type)
 #endif
+			    {
+#ifdef HAVE_IPV6
+			      if (addrlist->flags & ADDRLIST_REVONLY)
+				continue;
+#endif	
+			      ans = 1;	
+			      if (!dryrun)
 				{
 				  gotit = 1;
 				  log_query(F_FORWARD | F_CONFIG | flag, name, &addrlist->addr, NULL);
@@ -1934,7 +1971,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 							  type == T_A ? "4" : "6", &addrlist->addr))
 				    anscount++;
 				}
-			  }
+			    }
 		      }
 		  
 		  if (!dryrun && !gotit)

src/rfc2131.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -52,7 +52,9 @@ static void do_options(struct dhcp_context *context,
 		       int null_term, int pxearch,
 		       unsigned char *uuid,
 		       int vendor_class_len,
-		       time_t now);
+		       time_t now,
+		       unsigned int lease_time,
+		       unsigned short fuzz);
 
 
 static void match_vendor_opts(unsigned char *opt, struct dhcp_opt *dopt); 
@@ -610,7 +612,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	      
 	      clear_packet(mess, end);
 	      do_options(context, mess, end, NULL, hostname, get_domain(mess->yiaddr), 
-			 netid, subnet_addr, 0, 0, -1, NULL, vendor_class_len, now);
+			 netid, subnet_addr, 0, 0, -1, NULL, vendor_class_len, now, 0xffffffff, 0);
 	    }
 	}
       
@@ -803,9 +805,14 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	    if (service->type == type)
 	      break;
 	  
-	  if (!service || !service->basename)
+	  for (; context; context = context->current)
-	    return 0;
+	    if (match_netid(context->filter, tagif_netid, 1) &&
+		is_same_net(mess->ciaddr, context->start, context->netmask))
+	      break;
 	  
+	  if (!service || !service->basename || !context)
+	    return 0;
+	  	  
 	  clear_packet(mess, end);
 	  
 	  mess->yiaddr = mess->ciaddr;
@@ -886,10 +893,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 		  
 		  option_put(mess, end, OPTION_MESSAGE_TYPE, 1, 
 			     mess_type == DHCPDISCOVER ? DHCPOFFER : DHCPACK);
-		  option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(context->local.s_addr));
+		  option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(tmp->local.s_addr));
 		  pxe_misc(mess, end, uuid);
 		  prune_vendor_opts(tagif_netid);
-		  do_encap_opts(pxe_opts(pxearch, tagif_netid, context->local, now), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
+		  do_encap_opts(pxe_opts(pxearch, tagif_netid, tmp->local, now), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
 		  
 		  log_packet("PXE", NULL, emac, emac_len, iface_name, ignore ? "proxy-ignored" : "proxy", NULL, mess->xid);
 		  log_tags(tagif_netid, ntohl(mess->xid));
@@ -1042,13 +1049,8 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
       option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(server_id(context, override, fallback).s_addr));
       option_put(mess, end, OPTION_LEASE_TIME, 4, time);
       /* T1 and T2 are required in DHCPOFFER by HP's wacky Jetdirect client. */
-      if (time != 0xffffffff)
-	{
-	  option_put(mess, end, OPTION_T1, 4, (time/2));
-	  option_put(mess, end, OPTION_T2, 4, (time*7)/8);
-	}
       do_options(context, mess, end, req_options, offer_hostname, get_domain(mess->yiaddr), 
-		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now);
+		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now, time, fuzz);
       
       return dhcp_packet_size(mess, agent_id, real_end);
       
@@ -1367,15 +1369,8 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	  option_put(mess, end, OPTION_MESSAGE_TYPE, 1, DHCPACK);
 	  option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(server_id(context, override, fallback).s_addr));
 	  option_put(mess, end, OPTION_LEASE_TIME, 4, time);
-	  if (time != 0xffffffff)
-	    {
-	      while (fuzz > (time/16))
-		fuzz = fuzz/2; 
-	      option_put(mess, end, OPTION_T1, 4, (time/2) - fuzz);
-	      option_put(mess, end, OPTION_T2, 4, ((time/8)*7) - fuzz);
-	    }
 	  do_options(context, mess, end, req_options, hostname, get_domain(mess->yiaddr), 
-		     netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now);
+		     netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now, time, fuzz);
 	}
 
       return dhcp_packet_size(mess, agent_id, real_end); 
@@ -1440,7 +1435,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	}
 
       do_options(context, mess, end, req_options, hostname, get_domain(mess->ciaddr),
-		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now);
+		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now, 0xffffffff, 0);
       
       *is_inform = 1; /* handle reply differently */
       return dhcp_packet_size(mess, agent_id, real_end); 
@@ -2137,7 +2132,9 @@ static void do_options(struct dhcp_context *context,
 		       int null_term, int pxe_arch,
 		       unsigned char *uuid,
 		       int vendor_class_len,
-		       time_t now)
+		       time_t now,
+		       unsigned int lease_time,
+		       unsigned short fuzz)
 {
   struct dhcp_opt *opt, *config_opts = daemon->dhcp_opts;
   struct dhcp_boot *boot;
@@ -2261,7 +2258,42 @@ static void do_options(struct dhcp_context *context,
   /* rfc3011 says this doesn't need to be in the requested options list. */
   if (subnet_addr.s_addr)
     option_put(mess, end, OPTION_SUBNET_SELECT, INADDRSZ, ntohl(subnet_addr.s_addr));
-  
+   
+  if (lease_time != 0xffffffff)
+    { 
+      unsigned int t1val = lease_time/2; 
+      unsigned int t2val = (lease_time*7)/8;
+      unsigned int hval;
+      
+      /* If set by user, sanity check, so not longer than lease. */
+      if ((opt = option_find2(OPTION_T1)))
+	{
+	  hval = ntohl(*((unsigned int *)opt->val));
+	  if (hval < lease_time && hval > 2)
+	    t1val = hval;
+	}
+
+       if ((opt = option_find2(OPTION_T2)))
+	{
+	  hval = ntohl(*((unsigned int *)opt->val));
+	  if (hval < lease_time && hval > 2)
+	    t2val = hval;
+	}
+       	  
+       /* ensure T1 is still < T2 */
+       if (t2val <= t1val)
+	 t1val = t2val - 1; 
+
+       while (fuzz > (t1val/8))
+	 fuzz = fuzz/2;
+	 
+       t1val -= fuzz;
+       t2val -= fuzz;
+       
+       option_put(mess, end, OPTION_T1, 4, t1val);
+       option_put(mess, end, OPTION_T2, 4, t2val);
+    }
+
   /* replies to DHCPINFORM may not have a valid context */
   if (context)
     {
@@ -2356,12 +2388,14 @@ static void do_options(struct dhcp_context *context,
       if (!(opt->flags & DHOPT_FORCE) && !in_list(req_options, optno))
 	continue;
       
-      /* prohibit some used-internally options */
+      /* prohibit some used-internally options. T1 and T2 already handled. */
       if (optno == OPTION_CLIENT_FQDN ||
 	  optno == OPTION_MAXMESSAGE ||
 	  optno == OPTION_OVERLOAD ||
 	  optno == OPTION_PAD ||
-	  optno == OPTION_END)
+	  optno == OPTION_END ||
+	  optno == OPTION_T1 ||
+	  optno == OPTION_T2)
 	continue;
 
       if (optno == OPTION_SNAME && done_server)

src/rfc3315.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -313,8 +313,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
   else if (msg_type != DHCP6IREQ)
     return 0;
 
-  /* server-id must match except for SOLICIT and CONFIRM messages */
+  /* server-id must match except for SOLICIT, CONFIRM and REBIND messages */
-  if (msg_type != DHCP6SOLICIT && msg_type != DHCP6CONFIRM && msg_type != DHCP6IREQ &&
+  if (msg_type != DHCP6SOLICIT && msg_type != DHCP6CONFIRM && msg_type != DHCP6IREQ && msg_type != DHCP6REBIND &&
       (!(opt = opt6_find(state->packet_options, state->end, OPTION6_SERVER_ID, 1)) ||
        opt6_len(opt) != daemon->duid_len ||
        memcmp(opt6_ptr(opt, 0), daemon->duid, daemon->duid_len) != 0))
@@ -328,6 +328,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
       (msg_type == DHCP6REQUEST || msg_type == DHCP6RENEW || msg_type == DHCP6RELEASE || msg_type == DHCP6DECLINE))
     
     {  
+      *outmsgtypep = DHCP6REPLY;
       o1 = new_opt6(OPTION6_STATUS_CODE);
       put_opt6_short(DHCP6USEMULTI);
       put_opt6_string("Use multicast");
@@ -690,6 +691,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 #endif
 
 	    o = build_ia(state, &t1cntr);
+	    if (address_assigned)
+		address_assigned = 2;
 
 	    for (ia_counter = 0; ia_option; ia_counter++, ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
 	      {
@@ -780,6 +783,27 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		address_assigned = 1;
 	      }
 	    
+	    if (address_assigned != 1)
+	      {
+		/* If the server will not assign any addresses to any IAs in a
+		   subsequent Request from the client, the server MUST send an Advertise
+		   message to the client that doesn't include any IA options. */
+		if (!state->lease_allocate)
+		  {
+		    save_counter(o);
+		    continue;
+		  }
+		
+		/* If the server cannot assign any addresses to an IA in the message
+		   from the client, the server MUST include the IA in the Reply message
+		   with no addresses in the IA and a Status Code option in the IA
+		   containing status code NoAddrsAvail. */
+		o1 = new_opt6(OPTION6_STATUS_CODE);
+		put_opt6_short(DHCP6NOADDRS);
+		put_opt6_string(_("address unavailable"));
+		end_opt6(o1);
+	      }
+	    
 	    end_ia(t1cntr, min_time, 0);
 	    end_opt6(o);	
 	  }
@@ -805,7 +829,16 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	    put_opt6_short(DHCP6NOADDRS);
 	    put_opt6_string(_("no addresses available"));
 	    end_opt6(o1);
-	    log6_packet(state, "DHCPADVERTISE", NULL, _("no addresses available"));
+
+	    /* Some clients will ask repeatedly when we're not giving
+	       out addresses because we're in stateless mode. Avoid spamming
+	       the log in that case. */
+	    for (c = state->context; c; c = c->current)
+	      if (!(c->flags & CONTEXT_RA_STATELESS))
+		{
+		  log6_packet(state, state->lease_allocate ? "DHCPREPLY" : "DHCPADVERTISE", NULL, _("no addresses available"));
+		  break;
+		}
 	  }
 
 	break;
@@ -861,7 +894,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		      {
 			/* Static range, not configured. */
 			o1 = new_opt6(OPTION6_STATUS_CODE);
-			put_opt6_short(DHCP6UNSPEC);
+			put_opt6_short(DHCP6NOADDRS);
 			put_opt6_string(_("address unavailable"));
 			end_opt6(o1);
 		      }
@@ -1014,9 +1047,9 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		  {
 		    preferred_time = valid_time = 0;
 		    message = _("address invalid");
-		  }
+		  } 
 
-		if (message)
+		if (message && (message != state->hostname))
 		  log6_packet(state, "DHCPREPLY", req_addr, message);	
 		else
 		  log6_quiet(state, "DHCPREPLY", req_addr, message);
@@ -1039,6 +1072,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
       
     case DHCP6CONFIRM:
       {
+	int good_addr = 0;
+
 	/* set reply message type */
 	*outmsgtypep = DHCP6REPLY;
 	
@@ -1054,7 +1089,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	      {
 		struct in6_addr *req_addr = opt6_ptr(ia_option, 0);
 		
-		if (!address6_available(state->context, req_addr, tagif, 1))
+		if (!address6_valid(state->context, req_addr, tagif, 1))
 		  {
 		    o1 = new_opt6(OPTION6_STATUS_CODE);
 		    put_opt6_short(DHCP6NOTONLINK);
@@ -1063,9 +1098,14 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		    return 1;
 		  }
 
+		good_addr = 1;
 		log6_quiet(state, "DHCPREPLY", req_addr, state->hostname);
 	      }
 	  }	 
+	
+	/* No addresses, no reply: RFC 3315 18.2.2 */
+	if (!good_addr)
+	  return 0;
 
 	o1 = new_opt6(OPTION6_STATUS_CODE);
 	put_opt6_short(DHCP6SUCCESS );
@@ -1232,6 +1272,12 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	      }
 	    
 	  }
+
+	/* We must anwser with 'success' in global section anyway */
+	o1 = new_opt6(OPTION6_STATUS_CODE);
+	put_opt6_short(DHCP6SUCCESS);
+	put_opt6_string(_("success"));
+	end_opt6(o1);
 	break;
       }
 

src/slaac.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/tables.c

@@ -1,4 +1,6 @@
-/* tables.c is Copyright (c) 2014 Dohnuts All Rights Reserved.
+/* tables.c is Copyright (c) 2014 Sven Falempin  All Rights Reserved.
+
+   Author's email: sfalempin@citypassenger.com 
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -18,6 +20,10 @@
 
 #if defined(HAVE_IPSET) && defined(HAVE_BSD_NETWORK)
 
+#ifndef __FreeBSD__
+#include <string.h>
+#endif
+
 #include <sys/types.h>
 #include <sys/ioctl.h>
 
@@ -134,7 +140,7 @@ int add_to_ipset(const char *setname, const struct all_addr *ipaddr,
       return -1;
     }
   
-  if (rc = pfr_add_tables(&table, 1, &n, 0)) 
+  if ((rc = pfr_add_tables(&table, 1, &n, 0))) 
     {
       my_syslog(LOG_WARNING, _("warning: pfr_add_tables: %s(%d)"),
 		pfr_strerror(errno),rc);

src/tftp.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -236,7 +236,7 @@ void tftp_request(struct listener *listen, time_t now)
       if (ioctl(listen->tftpfd, SIOCGIFMTU, &ifr) != -1)
 	mtu = ifr.ifr_mtu;      
     }
-  
+
   if (name)
     {
       /* check for per-interface prefix */ 
@@ -502,7 +502,7 @@ static struct tftp_file *check_tftp_fileperm(ssize_t *len, char *prefix)
   return NULL;
 }
 
-void check_tftp_listeners(fd_set *rset, time_t now)
+void check_tftp_listeners(time_t now)
 {
   struct tftp_transfer *transfer, *tmp, **up;
   ssize_t len;
@@ -518,7 +518,7 @@ void check_tftp_listeners(fd_set *rset, time_t now)
       
       prettyprint_addr(&transfer->peer, daemon->addrbuff);
      
-      if (FD_ISSET(transfer->sockfd, rset))
+      if (poll_check(transfer->sockfd, POLLIN))
 	{
 	  /* we overwrote the buffer... */
 	  daemon->srv_save = NULL;

src/util.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2014 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -81,6 +81,18 @@ unsigned short rand16(void)
   return (unsigned short) out[--outleft];
 }
 
+u32 rand32(void)
+{
+ if (!outleft) 
+    {
+      if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3];
+      surf();
+      outleft = 8;
+    }
+  
+  return out[--outleft]; 
+}
+
 u64 rand64(void)
 {
   static int outleft = 0;
@@ -214,7 +226,14 @@ unsigned char *do_rfc1035_name(unsigned char *p, char *sval)
     {
       unsigned char *cp = p++;
       for (j = 0; *sval && (*sval != '.'); sval++, j++)
-	*p++ = *sval;
+	{
+#ifdef HAVE_DNSSEC
+	  if (option_bool(OPT_DNSSEC_VALID) && *sval == NAME_ESCAPE)
+	    *p++ = (*(++sval))-1;
+	  else
+#endif		
+	    *p++ = *sval;
+	}
       *cp  = j;
       if (*sval)
 	sval++;
@@ -262,6 +281,7 @@ int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2)
 #ifdef HAVE_IPV6      
       if (s1->sa.sa_family == AF_INET6 &&
 	  s1->in6.sin6_port == s2->in6.sin6_port &&
+	  s1->in6.sin6_scope_id == s2->in6.sin6_scope_id &&
 	  IN6_ARE_ADDR_EQUAL(&s1->in6.sin6_addr, &s2->in6.sin6_addr))
 	return 1;
 #endif
@@ -319,6 +339,19 @@ time_t dnsmasq_time(void)
 #endif
 }
 
+int netmask_length(struct in_addr mask)
+{
+  int zero_count = 0;
+
+  while (0x0 == (mask.s_addr & 0x1) && zero_count < 32) 
+    {
+      mask.s_addr >>= 1;
+      zero_count++;
+    }
+  
+  return 32 - zero_count;
+}
+
 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask)
 {
   return (a.s_addr & mask.s_addr) == (b.s_addr & mask.s_addr);
@@ -537,27 +570,41 @@ char *print_mac(char *buff, unsigned char *mac, int len)
   return buff;
 }
 
-void bump_maxfd(int fd, int *max)
+/* rc is return from sendto and friends.
+   Return 1 if we should retry.
+   Set errno to zero if we succeeded. */
+int retry_send(ssize_t rc)
 {
-  if (fd > *max)
+  static int retries = 0;
-    *max = fd;
+  struct timespec waiter;
-}
+  
+  if (rc != -1)
+    {
+      retries = 0;
+      errno = 0;
+      return 0;
+    }
+  
+  /* Linux kernels can return EAGAIN in perpetuity when calling
+     sendmsg() and the relevant interface has gone. Here we loop
+     retrying in EAGAIN for 1 second max, to avoid this hanging 
+     dnsmasq. */
 
-int retry_send(void)
+  if (errno == EAGAIN || errno == EWOULDBLOCK)
-{
-   struct timespec waiter;
-   if (errno == EAGAIN || errno == EWOULDBLOCK)
      {
        waiter.tv_sec = 0;
        waiter.tv_nsec = 10000;
        nanosleep(&waiter, NULL);
-       return 1;
+       if (retries++ < 1000)
+	 return 1;
      }
-   
+  
-   if (errno == EINTR)
+  retries = 0;
-     return 1;
+  
-
+  if (errno == EINTR)
-   return 0;
+    return 1;
+  
+  return 0;
 }
 
 int read_write(int fd, unsigned char *packet, int size, int rw)
@@ -566,22 +613,21 @@ int read_write(int fd, unsigned char *packet, int size, int rw)
   
   for (done = 0; done < size; done += n)
     {
-    retry:
+      do { 
-      if (rw)
+	if (rw)
-        n = read(fd, &packet[done], (size_t)(size - done));
+	  n = read(fd, &packet[done], (size_t)(size - done));
-      else
+	else
-        n = write(fd, &packet[done], (size_t)(size - done));
+	  n = write(fd, &packet[done], (size_t)(size - done));
+	
+	if (n == 0)
+	  return 0;
+	
+      } while (retry_send(n) || errno == ENOMEM || errno == ENOBUFS);
 
-      if (n == 0)
+      if (errno != 0)
-        return 0;
+	return 0;
-      else if (n == -1)
-        {
-          if (retry_send() || errno == ENOMEM || errno == ENOBUFS)
-            goto retry;
-          else
-            return 0;
-        }
     }
+     
   return 1;
 }
 
@@ -602,3 +648,22 @@ int wildcard_match(const char* wildcard, const char* match)
 
   return *wildcard == *match;
 }
+
+/* The same but comparing a maximum of NUM characters, like strncmp.  */
+int wildcard_matchn(const char* wildcard, const char* match, int num)
+{
+  while (*wildcard && *match && num)
+    {
+      if (*wildcard == '*')
+        return 1;
+
+      if (*wildcard != *match)
+        return 0; 
+
+      ++wildcard;
+      ++match;
+      --num;
+    }
+
+  return (!num) || (*wildcard == *match);
+}