More development on dhcp-split-relay.

To provoke this bug, at least the following must be true.

A reply must be a CNAME.
The target of the CNAME must not exist for the queried RR (a No Data reply).
The No Data reply must include an SOA record in the NS section.
The query must take place over TCP.

The result is the caching of a CNAME whose target is the
name of the SOA record, instead of the No data record.

If there is a RR at this target, then a subsequent query for that
RRtype will get a qrong reply.

Thanks to the testers extraordinaire at Pi-Hole for spotting this
and providing enough information to chase it down.

CHANGELOG

@@ -56,6 +56,20 @@ version 2.92
 	Many thanks to JAXPORT, Jacksonville Port Authority for sponsoring
 	this enhancement to dnsmasq.
 
+	Fix failure to cache PTR RRs when a reply contains more than one answer.
+	Thanks to Dmitry for spotting this.
+
+	Add TFTP options windowsize (RFC 7440) and timeout (RFC 2349).
+	
+	Change the behaviour of the DHVPv6 server when a REBIND message
+	is received but no lease exists. Under these circumstances a new
+	lease is created _only_ when the --dhcp-authoritative option is
+	set. This matches the behavior of the DHCPv4 server.
+
+	Add --dhcp-split-relay option. This makes a DHCPv4 relay which
+	is functional when client and server networks aren't mutually
+	route-able.
+
 	
 version 2.91
 	Fix spurious "resource limit exceeded messages". Thanks to 

doc.html

@@ -95,7 +95,5 @@ a contribution towards my expenses, please use the donation button below.
 <input type="image" src="https://www.paypalobjects.com/en_US/GB/i/btn/btn_donateCC_LG.gif" border="0" name="submit" alt="PayPal – The safer, easier way to pay online.">
 <img alt="" border="0" src="https://www.paypalobjects.com/en_GB/i/scr/pixel.gif" width="1" height="1">
 </form>
-
-
 </BODY>
-
+</HTML>

man/dnsmasq.8

@@ -673,7 +673,7 @@ machine on which dnsmasq is running) for each
 local machine. Local machines are those in /etc/hosts or with DHCP
 leases.
 .TP
-.B \-W, --srv-host=<_service>.<_prot>.[<domain>],[<target>[,<port>[,<priority>[,<weight>]]]]
+.B \-W, --srv-host=<_service>.<_prot>[.<domain>],[<target>[,<port>[,<priority>[,<weight>]]]]
 Return a SRV DNS record. See RFC2782 for details. If not supplied, the
 domain defaults to that given by
 .B --domain.
@@ -1487,7 +1487,31 @@ DHCPv4 to a DHCPv6 server or vice-versa.
 The DHCP relay function for IPv6 includes the ability to snoop
 prefix-delegation from relayed DHCP transactions. See
 .B --dhcp-script
-for details. 
+for details.
+.TP
+.B --dhcp-split-relay=<local address>,[<server address>[#<server port>]],<server-facing-interface>|<server-facing-address>
+A usefully enchanced version of DHCPv4 relay. IPv4 DHCP normally uses a single address
+for two functions; it is used by the DHCP server to determine which network to allocate
+an address on, and it is used as the address of the relay to which the server sends packets.
+
+This version of DHCP relay splits these functions. It uses the address of the server-facing relay
+interface or a directly-specified address as the address that the server talks to. The address of the client-facing interface
+(the first item in the config) is used as to determine the client's subnet. The
+local address is also used as server-ID override so that the client always sends requests
+via the relay. The effect of this is that server doesn't require
+a route to the client network and the clients don't require a route to the server.
+
+The third parameter is mandatory. If it is an interface name it cannot be a wildcard and the same filtering as descibed in
+--dhcp-relay applies; answers from the server must arrve via the specified interface. If the third parameter
+is an IP address it must be an address of a local interface which is routable from the server; In this case no filtering
+is done, the reply packets can arrive via any route.
+
+If setting up a network where the client networks have limited routing, be careful
+about configuring the DHCP server. Dnsmasq, as DHCP server, will set the default route to the
+client-facing relay interface unless explicitly configured: that is a sensible default.
+The normal default DNS server (the same address as the DHCP server)
+will not be appropriate when there is no route bewteen the
+two, so this will have to be explicitly configured. 
 .TP
 .B \-U, --dhcp-vendorclass=set:<tag>,[enterprise:<IANA-enterprise number>,]<vendor-class>
 Map from a vendor-class string to a tag. Most DHCP clients provide a 
@@ -1739,7 +1763,9 @@ For DHCPv4, it changes the behaviour from strict RFC compliance so that DHCP req
 unknown leases from unknown hosts are not ignored. This allows new hosts
 to get a lease without a tedious timeout under all circumstances. It also 
 allows dnsmasq to rebuild its lease database without each client needing to 
-reacquire a lease, if the database is lost. For DHCPv6 it sets the
+reacquire a lease, if the database is lost. For DHCPv6 it controls the same
+behaviour as DHCPv4 with missing leases (except for the RFC uncompliance - the
+DHCPv6 RFCs allow this behaviour if configured). It also sets the
 priority in replies to 255 (the maximum) instead of 0 (the minimum).
 .TP
 .B --dhcp-rapid-commit

setup.html

@@ -229,3 +229,5 @@ contents of the cache to the syslog.
 
 <P>For a complete listing of options please take a look at the manpage
 dnsmasq(8).
+</BODY>
+</HTML>

src/cache.c

@@ -102,6 +102,8 @@ static const struct {
   { 64,  "SVCB" }, /* Service Binding [draft-ietf-dnsop-svcb-https-00] SVCB/svcb-completed-template 2020-06-30*/
   { 65,  "HTTPS" }, /* HTTPS Binding [draft-ietf-dnsop-svcb-https-00] HTTPS/https-completed-template 2020-06-30*/
   { 66,  "DSYNC" }, /* Endpoint discovery for delegation synchronization [draft-ietf-dnsop-generalized-notify-03] DSYNC/dsync-completed-template 2024-12-10 */
+  { 67,  "HHIT" }, /* [draft-ietf-drip-registries-28] */
+  { 68,  "BRID" }, /* [draft-ietf-drip-registries-28] */
   { 99,  "SPF" }, /* [RFC7208] */
   { 100, "UINFO" }, /* [IANA-Reserved] */
   { 101, "UID" }, /* [IANA-Reserved] */
@@ -936,15 +938,14 @@ int cache_recv_insert(time_t now, int fd)
 		if (newc)
 		  {
 		    newc->addr.cname.is_name_ptr = 0;
+		    newc->addr.cname.target.cache = crecp;
 		    
-		    if (!crecp)
-		      newc->addr.cname.target.cache = NULL;
-		    else
+		    if (crecp)
 		      {
 			next_uid(crecp);
-			newc->addr.cname.target.cache = crecp;
 			newc->addr.cname.uid = crecp->uid;
 		      }
+		    crecp = newc;
 		  }
 	      }
 	    else
@@ -2358,6 +2359,8 @@ void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg,
     source = "reply";
   else if (flags & F_AUTH)
     source = "auth";
+  else if (flags & F_QUERY)
+    source = "query";
   else if (flags & F_SECSTAT)
     {
       if (addr && addr->log.ede != EDE_UNSET && option_bool(OPT_EXTRALOG))
@@ -2398,8 +2401,8 @@ void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg,
 	  source = "non-query opcode";
 	  name = opcodestring;
 	}
-      else if (!(flags & F_AUTH))
-	source = "query";
+      else if (type > 0)
+	source = querystr(source, type);
       
       verb = "from";
     }

src/config.h

@@ -52,6 +52,8 @@
 #define CHUSER "nobody"
 #define CHGRP "dip"
 #define TFTP_MAX_CONNECTIONS 50 /* max simultaneous connections */
+#define TFTP_MAX_WINDOW 32 /* max window size to negotiate */
+#define TFTP_TRANSFER_TIME 120 /* Abandon TFTP transfers after this long. Two mins. */
 #define LOG_MAX 5 /* log-queue length */
 #define RANDFILE "/dev/urandom"
 #define DNSMASQ_SERVICE "uk.org.thekelleys.dnsmasq" /* Default - may be overridden by config */
@@ -288,6 +290,7 @@ HAVE_SOCKADDR_SA_LEN
 #define HAVE_BSD_NETWORK
 #define HAVE_GETOPT_LONG
 #define HAVE_SOCKADDR_SA_LEN
+#define NO_IPSET
 /* Define before sys/socket.h is included so we get socklen_t */
 #define _BSD_SOCKLEN_T_
 /* Select the RFC_3542 version of the IPv6 socket API. 
@@ -347,7 +350,6 @@ HAVE_SOCKADDR_SA_LEN
 #endif
 
 #if !defined(HAVE_LINUX_NETWORK)
-#undef HAVE_IPSET
 #undef HAVE_NFTSET
 #endif
 
@@ -355,6 +357,16 @@ HAVE_SOCKADDR_SA_LEN
 #undef HAVE_IPSET
 #endif
 
+#if defined(HAVE_IPSET)
+#  if defined(HAVE_LINUX_NETWORK)
+#    define HAVE_LINUX_IPSET
+#  elif defined(HAVE_BSD_NETWORK)
+#    define HAVE_BSD_IPSET
+#  else
+#    undef HAVE_IPSET
+#  endif
+#endif
+
 #ifdef NO_LOOP
 #undef HAVE_LOOP
 #endif

src/dhcp-common.c

@@ -1067,10 +1067,12 @@ void log_relay(int family, struct dhcp_relay *relay)
     {
       if (broadcast)
 	my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s via %s"), daemon->addrbuff, relay->interface);
+      else if (relay->split_mode)
+	my_syslog(MS_DHCP | LOG_INFO, _("DHCP split-relay from %s to %s via %s"), daemon->addrbuff, daemon->namebuff, relay->interface);
       else
 	my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s to %s via %s"), daemon->addrbuff, daemon->namebuff, relay->interface);
     }
-  else
+  else 
     my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s to %s"), daemon->addrbuff, daemon->namebuff);
 }
    

src/dhcp-protocol.h

@@ -73,6 +73,7 @@
 #define SUBOPT_REMOTE_ID         2
 #define SUBOPT_SUBNET_SELECT     5     /* RFC 3527 */
 #define SUBOPT_SUBSCR_ID         6     /* RFC 3393 */
+#define SUBOPT_FLAGS             10    /* RFC 5010 */
 #define SUBOPT_SERVER_OR         11    /* RFC 5107 */
 
 #define SUBOPT_PXE_BOOT_ITEM     71    /* PXE standard */

src/dhcp.c

@@ -32,8 +32,6 @@ static int complete_context(struct in_addr local, int if_index, char *label,
 			    struct in_addr netmask, struct in_addr broadcast, void *vparam);
 static int check_listen_addrs(struct in_addr local, int if_index, char *label,
 			      struct in_addr netmask, struct in_addr broadcast, void *vparam);
-static void relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz);
-static struct dhcp_relay *relay_reply4(struct dhcp_packet *mess, char *arrival_interface);
 
 static int make_fd(int port)
 {
@@ -144,13 +142,14 @@ void dhcp_packet(time_t now, int pxe_fd)
   struct iovec iov;
   ssize_t sz; 
   int iface_index = 0, unicast_dest = 0, is_inform = 0, loopback = 0;
-  int rcvd_iface_index;
+  int rcvd_iface_index, relay_index;
   struct in_addr iface_addr;
   struct iface_param parm;
   time_t recvtime = now;
 #ifdef HAVE_LINUX_NETWORK
   struct arpreq arp_req;
   struct timeval tv;
+  struct in_addr dst_addr;
 #endif
   
   union {
@@ -176,13 +175,11 @@ void dhcp_packet(time_t now, int pxe_fd)
       (sz < (ssize_t)(sizeof(*mess) - sizeof(mess->options)))) 
     return;
   
-#ifdef HAVE_DUMPFILE
-  dump_packet_udp(DUMP_DHCP, (void *)daemon->dhcp_packet.iov_base, sz, (union mysockaddr *)&dest, NULL, fd);
-#endif
-  
 #if defined (HAVE_LINUX_NETWORK)
   if (ioctl(fd, SIOCGSTAMP, &tv) == 0)
     recvtime = tv.tv_sec;
+
+  dst_addr.s_addr = 0;
   
   if (msg.msg_controllen >= sizeof(struct cmsghdr))
     for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
@@ -194,7 +191,8 @@ void dhcp_packet(time_t now, int pxe_fd)
 	  } p;
 	  p.c = CMSG_DATA(cmptr);
 	  iface_index = p.p->ipi_ifindex;
-	  if (p.p->ipi_addr.s_addr != INADDR_BROADCAST)
+	  dst_addr = p.p->ipi_addr; 
+	  if (dst_addr.s_addr != INADDR_BROADCAST)
 	    unicast_dest = 1;
 	}
 
@@ -224,7 +222,25 @@ void dhcp_packet(time_t now, int pxe_fd)
 	  iface_index = *(p.i);
 	}
 #endif
-	
+
+#ifdef HAVE_DUMPFILE
+  union mysockaddr *sockp = NULL;
+  
+#  ifdef HAVE_LINUX_NETWORK
+  union mysockaddr tosock;
+  
+  sockp = &tosock;
+  tosock.in.sin_port = htons(daemon->dhcp_server_port);
+  tosock.in.sin_addr = dst_addr;
+  tosock.sa.sa_family = AF_INET;
+#    ifdef HAVE_SOCKADDR_SA_LEN
+  tosock.in.sin_len = sizeof(struct sockaddr_in);
+#    endif
+#  endif
+  
+  dump_packet_udp(DUMP_DHCP, (void *)daemon->dhcp_packet.iov_base, sz, (union mysockaddr *)&dest, sockp, -1);
+#endif
+  	
   if (!indextoname(daemon->dhcpfd, iface_index, ifr.ifr_name) ||
       ioctl(daemon->dhcpfd, SIOCGIFFLAGS, &ifr) != 0)
     return;
@@ -286,10 +302,10 @@ void dhcp_packet(time_t now, int pxe_fd)
     unicast_dest = 1;
 #endif
   
-  if ((relay = relay_reply4((struct dhcp_packet *)daemon->dhcp_packet.iov_base, ifr.ifr_name)))
+  if ((relay_index = relay_reply4((struct dhcp_packet *)daemon->dhcp_packet.iov_base, (size_t)sz, ifr.ifr_name)))
     {
       /* Reply from server, using us as relay. */
-      rcvd_iface_index = relay->iface_index;
+      rcvd_iface_index = relay_index;
       if (!indextoname(daemon->dhcpfd, rcvd_iface_index, ifr.ifr_name))
 	return;
       is_relay_reply = 1; 
@@ -314,9 +330,12 @@ void dhcp_packet(time_t now, int pxe_fd)
 	if (tmp->name && (tmp->flags & INAME_4) && wildcard_match(tmp->name, ifr.ifr_name))
 	  return;
       
-      /* unlinked contexts/relays are marked by context->current == context */
+      /* unlinked contexts are marked by context->current == context */
       for (context = daemon->dhcp; context; context = context->next)
 	context->current = context;
+
+      for (relay = daemon->relay4; relay; relay = relay->next)
+	relay->matchcount = 0;
       
       parm.current = NULL;
       parm.ind = iface_index;
@@ -344,7 +363,7 @@ void dhcp_packet(time_t now, int pxe_fd)
       if (!iface_enumerate(AF_INET, &parm, (callback_t){.af_inet=complete_context}))
 	return;
 
-      relay_upstream4(iface_index, mess, (size_t)sz);
+      relay_upstream4(iface_addr, iface_index, mess, (size_t)sz, unicast_dest);
        
       /* May have configured relay, but not DHCP server */
       if (!daemon->dhcp)
@@ -648,8 +667,19 @@ static int complete_context(struct in_addr local, int if_index, char *label,
     }
 
   for (relay = daemon->relay4; relay; relay = relay->next)
-    if (relay->local.addr4.s_addr == local.s_addr)
-      relay->iface_index = if_index;
+    if (!relay->split_mode && relay->local.addr4.s_addr == local.s_addr)
+      {
+	if (if_index == param->ind)
+	  relay->iface_index = if_index;
+	
+	/* More than one interface with the relay address breaks things. */
+	if (relay->matchcount++ == 1 && !relay->warned)
+	  {
+	    relay->warned = 1;
+	    inet_ntop(AF_INET, &local, daemon->addrbuff, ADDRSTRLEN);
+	    my_syslog(MS_DHCP | LOG_WARNING, _("DHCP relay address %s appears on more than one interface"), daemon->addrbuff);
+	  }
+      }
   
   return 1;
 }
@@ -1091,122 +1121,4 @@ char *host_from_dns(struct in_addr addr)
   return NULL;
 }
 
-static void relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz)
-{
-  struct in_addr giaddr = mess->giaddr;
-  u8 hops = mess->hops;
-  struct dhcp_relay *relay;
-
-  if (mess->op != BOOTREQUEST)
-    return;
-
-  for (relay = daemon->relay4; relay; relay = relay->next)
-    if (relay->iface_index != 0 && relay->iface_index == iface_index)
-      break;
-
-  /* No relay config. */
-  if (!relay)
-    return;
-  
-  for (; relay; relay = relay->next)
-    if (relay->iface_index != 0 && relay->iface_index == iface_index)
-      {
-	union mysockaddr to;
-	union all_addr from;
-
-	mess->hops = hops;
-	mess->giaddr = giaddr;
-	
-	if ((mess->hops++) > 20)
-	  continue;
-	
-	/* source address == relay address */
-	from.addr4 = relay->local.addr4;
-
-	/* already gatewayed ? */
-	if (giaddr.s_addr)
-	  {
-	    /* if so check if by us, to stomp on loops. */
-	    if (giaddr.s_addr == relay->local.addr4.s_addr)
-	      continue;
-	  }
-	else
-	  {
-	    /* plug in our address */
-	    mess->giaddr.s_addr = relay->local.addr4.s_addr;
-	  }
-	
-	to.sa.sa_family = AF_INET;
-	to.in.sin_addr = relay->server.addr4;
-	to.in.sin_port = htons(relay->port);
-#ifdef HAVE_SOCKADDR_SA_LEN
-	to.in.sin_len = sizeof(struct sockaddr_in);
-#endif
-	
-	/* Broadcasting to server. */
-	if (relay->server.addr4.s_addr == 0)
-	  {
-	    struct ifreq ifr;
-	    
-	    if (relay->interface)
-	      safe_strncpy(ifr.ifr_name, relay->interface, IF_NAMESIZE);
-	    
-	    if (!relay->interface || strchr(relay->interface, '*') ||
-		ioctl(daemon->dhcpfd, SIOCGIFBRDADDR, &ifr) == -1)
-	      {
-		my_syslog(MS_DHCP | LOG_ERR, _("Cannot broadcast DHCP relay via interface %s"), relay->interface);
-		continue;
-	      }
-	    
-	    to.in.sin_addr = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
-	  }
-	
-#ifdef HAVE_DUMPFILE
-	{
-	  union mysockaddr fromsock;
-	  fromsock.in.sin_port = htons(daemon->dhcp_server_port);
-	  fromsock.in.sin_addr = from.addr4;
-	  fromsock.sa.sa_family = AF_INET;
-
-	  dump_packet_udp(DUMP_DHCP, (void *)mess, sz, &fromsock, &to, -1);
-	}
-#endif
-	
-	 send_from(daemon->dhcpfd, 0, (char *)mess, sz, &to, &from, 0);
-	 
-	 if (option_bool(OPT_LOG_OPTS))
-	   {
-	     inet_ntop(AF_INET, &relay->local, daemon->addrbuff, ADDRSTRLEN);
-	     if (relay->server.addr4.s_addr == 0)
-	       snprintf(daemon->dhcp_buff2, DHCP_BUFF_SZ, _("broadcast via %s"), relay->interface);
-	     else
-	       inet_ntop(AF_INET, &relay->server.addr4, daemon->dhcp_buff2, DHCP_BUFF_SZ);
-	     my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay at %s -> %s"), daemon->addrbuff, daemon->dhcp_buff2);
-	   }
-      }
-  
-  /* restore in case of a local reply. */
-  mess->giaddr = giaddr;
-}
-
-
-static struct dhcp_relay *relay_reply4(struct dhcp_packet *mess, char *arrival_interface)
-{
-  struct dhcp_relay *relay;
-
-  if (mess->giaddr.s_addr == 0 || mess->op != BOOTREPLY)
-    return NULL;
-
-  for (relay = daemon->relay4; relay; relay = relay->next)
-    {
-      if (mess->giaddr.s_addr == relay->local.addr4.s_addr)
-	{
-	  if (!relay->interface || wildcard_match(relay->interface, arrival_interface))
-	    return relay->iface_index != 0 ? relay : NULL;
-	}
-    }
-  
-  return NULL;	 
-}     
-
 #endif

src/dhcp6.c

@@ -89,6 +89,7 @@ void dhcp6_init(void)
 void dhcp6_packet(time_t now)
 {
   struct dhcp_context *context;
+  struct dhcp_relay *relay;
   struct iface_param parm;
   struct cmsghdr *cmptr;
   struct msghdr msg;
@@ -176,6 +177,7 @@ void dhcp6_packet(time_t now)
   else
     {
       struct dhcp_bridge *bridge, *alias;
+      int multicast_dest = 0;
       
       for (tmp = daemon->if_except; tmp; tmp = tmp->next)
 	if (tmp->name && wildcard_match(tmp->name, ifr.ifr_name))
@@ -230,14 +232,24 @@ void dhcp6_packet(time_t now)
 	    context->current = context;
 	    memset(&context->local6, 0, IN6ADDRSZ);
 	  }
+
+      for (relay = daemon->relay6; relay; relay = relay->next)
+	relay->matchcount = 0;
+
+      inet_pton(AF_INET6, ALL_RELAY_AGENTS_AND_SERVERS, &all_servers);
+      if (IN6_ARE_ADDR_EQUAL(&dst_addr, &all_servers))
+	multicast_dest = 1;
       
-      /* Ignore requests sent to the ALL_SERVERS multicast address for relay when
-	 we're listening there for DHCPv6 server reasons. */
       inet_pton(AF_INET6, ALL_SERVERS, &all_servers);
-      
-      if (!IN6_ARE_ADDR_EQUAL(&dst_addr, &all_servers) &&
-	  relay_upstream6(if_index, (size_t)sz, &from.sin6_addr, from.sin6_scope_id, now))
-	return;
+      if (IN6_ARE_ADDR_EQUAL(&dst_addr, &all_servers))
+	multicast_dest = 1;
+      else
+	{
+	  /* Ignore requests sent to the ALL_SERVERS multicast address for relay when
+	     we're listening there for DHCPv6 server reasons. */
+	  if (relay_upstream6(if_index, (size_t)sz, &from.sin6_addr, from.sin6_scope_id, now))
+	    return;
+	}
       
       if (!iface_enumerate(AF_INET6, &parm, (callback_t){.af_inet6=complete_context6}))
 	return;
@@ -266,7 +278,7 @@ void dhcp6_packet(time_t now)
       
       lease_prune(NULL, now); /* lose any expired leases */
       
-      port = dhcp6_reply(parm.current, if_index, ifr.ifr_name, &parm.fallback, 
+      port = dhcp6_reply(parm.current, multicast_dest, if_index, ifr.ifr_name, &parm.fallback, 
 			 &parm.ll_addr, &parm.ula_addr, sz, &from.sin6_addr, now);
       
       /* The port in the source address of the original request should
@@ -444,7 +456,17 @@ static int complete_context6(struct in6_addr *local,  int prefix,
   if (match)
     for (relay = daemon->relay6; relay; relay = relay->next)
       if (IN6_ARE_ADDR_EQUAL(local, &relay->local.addr6))
-	relay->iface_index = if_index;
+	{
+	  relay->iface_index = if_index;
+
+	  /* More than one interface with the relay address breaks things. */
+	  if (relay->matchcount++ == 1 && !relay->warned)
+	    {
+	      relay->warned = 1;
+	      inet_ntop(AF_INET6, &local, daemon->addrbuff, ADDRSTRLEN);
+	      my_syslog(MS_DHCP | LOG_WARNING, _("DHCP relay address %s appears on more than one interface"), daemon->addrbuff);
+	    }
+	}
   
   return 1;
 }

src/dnsmasq.c

@@ -30,7 +30,9 @@ static volatile pid_t pid = 0;
 static volatile int pipewrite;
 
 static void set_dns_listeners(void);
+#ifdef HAVE_TFTP
 static void set_tftp_listeners(void);
+#endif
 static void check_dns_listeners(time_t now);
 static void do_tcp_connection(struct listener *listener, time_t now, int slot);
 static void sig_handler(int sig);
@@ -62,14 +64,16 @@ int main (int argc, char **argv)
   int need_cap_net_raw = 0;
   int need_cap_net_bind_service = 0;
   int have_cap_chown = 0;
+#  ifdef HAVE_DHCP
   char *bound_device = NULL;
   int did_bind = 0;
+#  endif
   struct server *serv;
   char *netlink_warn;
 #else
   int bind_fallback = 0;
 #endif 
-#if defined(HAVE_DHCP) || defined(HAVE_DHCP6)
+#if defined(HAVE_DHCP)
   struct dhcp_context *context;
   struct dhcp_relay *relay;
 #endif
@@ -77,6 +81,10 @@ int main (int argc, char **argv)
   int tftp_prefix_missing = 0;
 #endif
 
+#ifdef HAVE_LINUX_NETWORK
+  (void)netlink_warn;
+#endif
+  
 #if defined(HAVE_IDN) || defined(HAVE_LIBIDN2) || defined(LOCALEDIR)
   setlocale(LC_ALL, "");
 #endif
@@ -1769,9 +1777,9 @@ void clear_cache_and_reload(time_t now)
 #ifdef HAVE_DHCP
   if (daemon->dhcp || daemon->doing_dhcp6)
     {
+      reread_dhcp();
       if (option_bool(OPT_ETHERS))
 	dhcp_read_ethers();
-      reread_dhcp();
       dhcp_update_configs(daemon->dhcp_conf);
       lease_update_from_configs(); 
       lease_update_file(now); 
@@ -1939,11 +1947,14 @@ static void do_tcp_connection(struct listener *listener, time_t now, int slot)
   pid_t p;
   union mysockaddr tcp_addr;
   socklen_t tcp_len = sizeof(union mysockaddr);
-  unsigned char a = 0, *buff;
+  unsigned char *buff;
   struct server *s; 
   int flags, auth_dns;
   struct in_addr netmask;
   int pipefd[2];
+#ifdef HAVE_LINUX_NETWORK
+  unsigned char a = 0;
+#endif
 
   while ((confd = accept(listener->tcpfd, NULL, NULL)) == -1 && errno == EINTR);
   
@@ -2052,7 +2063,7 @@ static void do_tcp_connection(struct listener *listener, time_t now, int slot)
 	     single byte comes back up the pipe, which
 	     is sent by the child after it has closed the
 	     netlink socket. */
-	  
+
 	  read_write(pipefd[0], &a, 1, RW_READ);
 #endif
 	  

src/dnsmasq.h

@@ -48,6 +48,12 @@
 #define ATTRIBUTE_NORETURN
 #endif
 
+#if __GNUC__ + 0 >= 8 // clang 20.1.0 does not yet support this
+#define ATTRIBUTE_NONSTRING __attribute__ ((nonstring))
+#else
+#define ATTRIBUTE_NONSTRING
+#endif
+
 /* get these before config.h  for IPv6 stuff... */
 #include <sys/types.h> 
 #include <sys/socket.h>
@@ -1111,14 +1117,13 @@ struct tftp_file {
 
 struct tftp_transfer {
   int sockfd;
-  time_t timeout;
-  int backoff;
-  unsigned int block, blocksize, expansion;
+  time_t retransmit, start;
+  unsigned int lastack, block, blocksize, windowsize, timeout, expansion;
   off_t offset;
   union mysockaddr peer;
   union all_addr source;
   int if_index;
-  char opt_blocksize, opt_transize, netascii, carrylf;
+  unsigned char opt_blocksize, opt_transize, opt_windowsize, opt_timeout, netascii, carrylf, backoff;
   struct tftp_file *file;
   struct tftp_transfer *next;
 };
@@ -1139,10 +1144,12 @@ struct dhcp_relay {
   union {
     struct in_addr addr4;
     struct in6_addr addr6;
-  } local, server;
+  } local, server, uplink;
   char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
   int iface_index; /* working - interface in which requests arrived, for return */
   int port;        /* Port of relay we forward to. */
+  int split_mode;  /* Split address allocation and relay address. */
+  int warned, matchcount;
 #ifdef HAVE_SCRIPT
   struct snoop_record {
     struct in6_addr client, prefix;
@@ -1413,7 +1420,7 @@ unsigned int extract_request(struct dns_header *header, size_t qlen, char *name,
 			     unsigned short *typep, unsigned short *classp);
 void setup_reply(struct dns_header *header, unsigned int flags, int ede);
 int extract_addresses(struct dns_header *header, size_t qlen, char *name,
-		      time_t now, struct ipsets *ipsets, struct ipsets *nftsets, int is_sign,
+		      time_t now, struct ipsets *ipsets, struct ipsets *nftsets,
                       int check_rebind, int no_cache_dnssec, int secure);
 #if defined(HAVE_CONNTRACK) && defined(HAVE_UBUS)
 void report_addresses(struct dns_header *header, size_t len, u32 mark);
@@ -1661,6 +1668,9 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 		  time_t recvtime, struct in_addr leasequery_source);
 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr, 
 			       int clid_len, unsigned char *clid, int *len_out);
+void relay_upstream4(struct in_addr iface_addr, int iface_index,
+		     struct dhcp_packet *mess, size_t sz, int unicast);
+unsigned int relay_reply4(struct dhcp_packet *mess, size_t sz, char *arrival_interface);
 #endif
 
 /* dnsmasq.c */
@@ -1762,7 +1772,6 @@ void queue_relay_snoop(struct in6_addr *client, int if_index, struct in6_addr *p
 
 /* tftp.c */
 #ifdef HAVE_TFTP
-void tftp_request(struct listener *listen, time_t now);
 void check_tftp_listeners(time_t now);
 int do_tftp_script_run(void);
 #endif
@@ -1797,7 +1806,7 @@ void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
   
 /* rfc3315.c */
 #ifdef HAVE_DHCP6
-unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,  
+unsigned short dhcp6_reply(struct dhcp_context *context, int multicast_dest, int interface, char *iface_name,  
 			   struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
 			   size_t sz, struct in6_addr *client_addr, time_t now);
 int relay_upstream6(int iface_index, ssize_t sz, struct in6_addr *peer_address, 
@@ -1934,7 +1943,7 @@ size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header
 			 char *name, char *limit, int first, int last, int ede);
 int server_samegroup(struct server *a, struct server *b);
 #ifdef HAVE_DNSSEC
-int dnssec_server(struct server *server, char *keyname, int *firstp, int *lastp);
+int dnssec_server(struct server *server, char *keyname, int is_ds, int *firstp, int *lastp);
 #endif
 void mark_servers(int flag);
 void cleanup_servers(void);

src/domain-match.c

@@ -95,6 +95,7 @@ void build_server_array(void)
 
    A flag of F_SERVER returns an upstream server only.
    A flag of F_DNSSECOK disables NODOTS servers from consideration.
+   A flag of F_DS returns parent domain server.
    A flag of F_DOMAINSRV returns a domain-specific server only.
    A flag of F_CONFIG returns anything that generates a local
    reply of IPv4 or IPV6.
@@ -106,12 +107,23 @@ int lookup_domain(char *domain, int flags, int *lowout, int *highout)
   ssize_t qlen;
   int try, high, low = 0;
   int nlow = 0, nhigh = 0;
-  char *cp, *qdomain = domain;
-
+  char *cp, *qdomain;
+  
   /* may be no configured servers. */
   if (daemon->serverarraysz == 0)
     return 0;
+
+  /* DS records should come from the parent domain. */
+  if (flags & F_DS)
+    {
+      if ((cp = strchr(domain, '.')))
+	domain = cp+1;
+      else
+	domain = "";
+    }
   
+  qdomain = domain;
+
   /* find query length and presence of '.' */
   for (cp = qdomain, nodots = 1, qlen = 0; *cp; qlen++, cp++)
     if (*cp == '.')
@@ -244,7 +256,10 @@ int lookup_domain(char *domain, int flags, int *lowout, int *highout)
   if (nodots &&
       (daemon->serverarray[daemon->serverarraysz-1]->flags & SERV_FOR_NODOTS) &&
       (nlow == nhigh || daemon->serverarray[nlow]->domain_len == 0))
-    filter_servers(daemon->serverarraysz-1, flags, &nlow, &nhigh);
+    {
+      filter_servers(daemon->serverarraysz-1, flags, &nlow, &nhigh);
+      qlen = 0;
+    }
   
   if (lowout)
     *lowout = nlow;
@@ -343,10 +358,9 @@ int filter_servers(int seed, int flags, int *lowout, int *highout)
 		      else
 			{
 			  /* If we want a server for a particular domain, and this one isn't, return nothing. */
-			  if ((flags & F_DOMAINSRV) && daemon->serverarray[nlow]->domain_len == 0)
+			  if (nlow < daemon->serverarraysz && nlow != nhigh && (flags & F_DOMAINSRV) &&
+			      daemon->serverarray[nlow]->domain_len == 0 && !(daemon->serverarray[nlow]->flags & SERV_FOR_NODOTS))
 			    nlow = nhigh;
-			  else
-			    nlow = i;
 			}
 		    }
 		}
@@ -401,7 +415,7 @@ size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header
   
   setup_reply(header, flags, ede);
 
-  gotname &= ~F_QUERY;
+  gotname &= ~(F_QUERY | F_DS);
   
   if (flags & (F_NXDOMAIN | F_NOERR))
     log_query(flags | gotname | F_NEG | F_CONFIG | F_FORWARD, name, NULL, NULL, 0);
@@ -461,14 +475,14 @@ size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header
 }
 
 #ifdef HAVE_DNSSEC
-int dnssec_server(struct server *server, char *keyname, int *firstp, int *lastp)
+int dnssec_server(struct server *server, char *keyname, int is_ds, int *firstp, int *lastp)
 {
   int first, last, index;
-
+  
   /* Find server to send DNSSEC query to. This will normally be the 
      same as for the original query, but may be another if
      servers for domains are involved. */		      
-  if (!lookup_domain(keyname, F_SERVER | F_DNSSECOK, &first, &last))
+  if (!lookup_domain(keyname, F_SERVER | F_DNSSECOK | (is_ds ? F_DS : 0), &first, &last))
     return -1;
 
   for (index = first; index != last; index++)

src/edns0.c

@@ -494,7 +494,7 @@ int check_source(struct dns_header *header, size_t plen, unsigned char *pseudohe
 #define UMBRELLA_DEVICESZ   sizeof(daemon->umbrella_device)
 
 struct umbrella_opt {
-  u8 magic[4];
+  u8 magic[4] ATTRIBUTE_NONSTRING;
   u8 version;
   u8 flags;
   /* We have 4 possible fields since we'll never send both IPv4 and

src/forward.c

@@ -670,6 +670,7 @@ int fast_retry(time_t now)
   return ret;
 }
 
+#if defined(HAVE_IPSET) || defined(HAVE_NFTSET)
 static struct ipsets *domain_find_sets(struct ipsets *setlist, const char *domain) {
   /* Similar algorithm to search_servers. */
   struct ipsets *ipset_pos, *ret = NULL;
@@ -690,6 +691,7 @@ static struct ipsets *domain_find_sets(struct ipsets *setlist, const char *domai
 
   return ret;
 }
+#endif
 
 static size_t process_reply(struct dns_header *header, time_t now, struct server *server, size_t n, int check_rebind, 
 			    int no_cache, int cache_secure, int bogusanswer, int ad_reqd, int do_bit, int added_pheader, 
@@ -761,6 +763,16 @@ static size_t process_reply(struct dns_header *header, time_t now, struct server
   if (!is_sign && !option_bool(OPT_DNSSEC_PROXY))
      header->hb4 &= ~HB4_AD;
 
+  /* Complain loudly if the upstream server is non-recursive. */
+  if (!(header->hb4 & HB4_RA) && rcode == NOERROR &&
+      server && !(server->flags & SERV_WARNED_RECURSIVE))
+    {
+      (void)prettyprint_addr(&server->addr, daemon->namebuff);
+      my_syslog(LOG_WARNING, _("nameserver %s refused to do a recursive query"), daemon->namebuff);
+      if (!option_bool(OPT_LOG))
+	server->flags |= SERV_WARNED_RECURSIVE;
+    }  
+
   header->hb4 |= HB4_RA; /* recursion if available */
 
   if (OPCODE(header) != QUERY)
@@ -776,16 +788,6 @@ static size_t process_reply(struct dns_header *header, time_t now, struct server
       return resize_packet(header, n, pheader, plen);
     }
   
-  /* Complain loudly if the upstream server is non-recursive. */
-  if (!(header->hb4 & HB4_RA) && rcode == NOERROR &&
-      server && !(server->flags & SERV_WARNED_RECURSIVE))
-    {
-      (void)prettyprint_addr(&server->addr, daemon->namebuff);
-      my_syslog(LOG_WARNING, _("nameserver %s refused to do a recursive query"), daemon->namebuff);
-      if (!option_bool(OPT_LOG))
-	server->flags |= SERV_WARNED_RECURSIVE;
-    }  
-
   if (header->hb3 & HB3_TC)
     log_query(F_UPSTREAM, NULL, NULL, "truncated", 0);
   else if (!bogusanswer || (header->hb4 & HB4_CD))
@@ -819,7 +821,7 @@ static size_t process_reply(struct dns_header *header, time_t now, struct server
 	}
       else
 	{
-	  int rc = extract_addresses(header, n, daemon->namebuff, now, ipsets, nftsets, is_sign, check_rebind, no_cache, cache_secure);
+	  int rc = extract_addresses(header, n, daemon->namebuff, now, ipsets, nftsets, check_rebind, no_cache, cache_secure);
 
 	  if (rc != 0)
 	    {
@@ -1022,7 +1024,7 @@ static void dnssec_validate(struct frec *forward, struct dns_header *header,
 	     	      
 	      /* Make sure we don't expire and free the orig frec during the
 		 allocation of a new one: third arg of get_new_frec() does that. */
-	      if ((serverind = dnssec_server(forward->sentto, daemon->keyname, NULL, NULL)) != -1 &&
+	      if ((serverind = dnssec_server(forward->sentto, daemon->keyname, STAT_ISEQUAL(status, STAT_NEED_DS), NULL, NULL)) != -1 &&
 		  (server = daemon->serverarray[serverind]) &&
 		  (nn = dnssec_generate_query(header, ((unsigned char *) header) + daemon->edns_pktsz,
 					      daemon->keyname, forward->class, get_id(),
@@ -2197,7 +2199,7 @@ int tcp_from_udp(time_t now, int status, struct dns_header *header, ssize_t *ple
   first = start = server->arrayposn;
   last = first + 1;
   
-  if (!STAT_ISEQUAL(status, STAT_OK) && (start = dnssec_server(server, name, &first, &last)) == -1)
+  if (!STAT_ISEQUAL(status, STAT_OK) && (start = dnssec_server(server, name, STAT_ISEQUAL(status, STAT_NEED_DS), &first, &last)) == -1)
     new_status = STAT_ABANDONED;
   else
     {
@@ -2305,7 +2307,7 @@ static int tcp_key_recurse(time_t now, int status, struct dns_header *header, si
       m = dnssec_generate_query(new_header, ((unsigned char *) new_header) + 65536, keyname, class, 0,
 				STAT_ISEQUAL(new_status, STAT_NEED_KEY) ? T_DNSKEY : T_DS);
       
-      if ((start = dnssec_server(server, keyname, &first, &last)) == -1)
+      if ((start = dnssec_server(server, keyname, STAT_ISEQUAL(new_status, STAT_NEED_DS), &first, &last)) == -1)
 	{
 	  new_status = STAT_ABANDONED;
 	  break;

src/inotify.c

@@ -133,29 +133,44 @@ void inotify_dnsmasq_init()
     }
 }
 
-static struct hostsfile *dyndir_addhosts(struct dyndir *dd, char *path)
+static struct hostsfile *dyndir_addhosts(struct dyndir *dd, char *file)
 {
   /* Check if this file is already known in dd->files */
-  struct hostsfile *ah = NULL;
-  for(ah = dd->files; ah; ah = ah->next)
-    if(ah && ah->fname && strcmp(path, ah->fname) == 0)
+  struct hostsfile *ah;
+  size_t dirlen = strlen(dd->dname);
+  
+  /* ah->fname always starts with the string in dd->dname */
+  for (ah = dd->files; ah; ah = ah->next)
+    if (ah->fname[dirlen] == '/' &&
+        strcmp(&ah->fname[dirlen+1], file) == 0)
       return ah;
-
+        
   /* Not known, create new hostsfile record for this dyndir */
-  struct hostsfile *newah = NULL;
-  if(!(newah = whine_malloc(sizeof(struct hostsfile))))
-    return NULL;
+  if ((ah = whine_malloc(sizeof(struct hostsfile))))
+    {
+      char *path;
 
-  /* Add this file to the tip of the linked list */
-  newah->next = dd->files;
-  dd->files = newah;
-
-  /* Copy flags, set index and the full file path */
-  newah->flags = dd->flags;
-  newah->index = daemon->host_index++;
-  newah->fname = path;
-
-  return newah;
+      if (!(path = whine_malloc(dirlen + strlen(file) + 2)))
+	{
+	  free(ah);
+	  return NULL;
+	}
+      
+      strcpy(path, dd->dname);
+      strcat(path, "/");
+      strcat(path, file);
+      
+      /* Add this file to the tip of the linked list */
+      ah->next = dd->files;
+      dd->files = ah;
+      
+      /* Copy flags, set index and the full file path */
+      ah->flags = dd->flags;
+      ah->index = daemon->host_index++;
+      ah->fname = path;
+    }
+  
+  return ah;
 }
 
 
@@ -204,10 +219,8 @@ void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revh
 
        while ((ent = readdir(dir_stream)))
 	 {
-	   size_t lendir = strlen(dd->dname);
 	   size_t lenfile = strlen(ent->d_name);
-	   char *path;
-
+	   	   
 	   /* ignore emacs backups and dotfiles */
 	   if (lenfile == 0 || 
 	       ent->d_name[lenfile - 1] == '~' ||
@@ -215,33 +228,36 @@ void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revh
 	       ent->d_name[0] == '.')
 	     continue;
 
-	   if ((path = whine_malloc(lendir + lenfile + 2)))
+	   if (dd->flags & AH_HOSTS)
 	     {
 	       struct hostsfile *ah;
 
-	       strcpy(path, dd->dname);
-	       strcat(path, "/");
-	       strcat(path, ent->d_name);
-
-	       if (!(ah = dyndir_addhosts(dd, path)))
-		 {
-		   free(path);
-		   continue;
-		 }
-	       
 	       /* ignore non-regular files */
-	       if (stat(path, &buf) != -1 && S_ISREG(buf.st_mode))
-		 {
-		   if (dd->flags & AH_HOSTS)
-		     total_size = read_hostsfile(path, ah->index, total_size, rhash, revhashsz);
+	       if ((ah = dyndir_addhosts(dd, ent->d_name)) &&
+		   stat(ah->fname, &buf) != -1 && S_ISREG(buf.st_mode))
+		 total_size = read_hostsfile(ah->fname, ah->index, total_size, rhash, revhashsz);
+	     }
 #ifdef HAVE_DHCP
-		   else if (dd->flags & (AH_DHCP_HST | AH_DHCP_OPT))
+	   else if (dd->flags & (AH_DHCP_HST | AH_DHCP_OPT))
+	     {
+	       char *path;
+	       
+	       if ((path = whine_malloc(strlen(dd->dname) + lenfile + 2)))
+		 {
+		   strcpy(path, dd->dname);
+		   strcat(path, "/");
+		   strcat(path, ent->d_name);
+		   
+		   /* ignore non-regular files */
+		   if (stat(path, &buf) != -1 && S_ISREG(buf.st_mode))
 		     option_read_dynfile(path, dd->flags);
-#endif		   
+		   
+		   free(path);
 		 }
 	     }
+#endif		   
 	 }
-
+       
        closedir(dir_stream);
     }
 }
@@ -251,6 +267,8 @@ int inotify_check(time_t now)
   int hit = 0;
   struct dyndir *dd;
 
+  (void)now;
+  
   while (1)
     {
       int rc;
@@ -283,50 +301,27 @@ int inotify_check(time_t now)
 	  for (dd = daemon->dynamic_dirs; dd; dd = dd->next)
 	    if (dd->wd == in->wd)
 	      {
-		size_t lendir = strlen(dd->dname);
-		char *path;
-				
-		if ((path = whine_malloc(lendir + in->len + 2)))
+		if (dd->flags & AH_HOSTS)
 		  {
-		    struct hostsfile *ah = NULL;
-
-		    strcpy(path, dd->dname);
-		    strcat(path, "/");
-		    strcat(path, in->name);
-
-		    /* Is this is a deletion event? */
-		    if (in->mask & IN_DELETE)
-		      my_syslog(LOG_INFO, _("inotify: %s removed"), path);
-		    else 
-		      my_syslog(LOG_INFO, _("inotify: %s new or modified"), path);
-
-		    if (dd->flags & AH_HOSTS)
+		    struct hostsfile *ah;
+		    if ((ah = dyndir_addhosts(dd, in->name)))
 		      {
-			if ((ah = dyndir_addhosts(dd, path)))
-			  {
-			    const unsigned int removed = cache_remove_uid(ah->index);
-			    if (removed > 0)
-			      my_syslog(LOG_INFO, _("inotify: flushed %u names read from %s"), removed, path);
+			const unsigned int removed = cache_remove_uid(ah->index);
 
-			    /* (Re-)load hostsfile only if this event isn't triggered by deletion */
-			    if (!(in->mask & IN_DELETE))
-			      read_hostsfile(path, ah->index, 0, NULL, 0);
+			/* Is this is a deletion event? */
+			if (in->mask & IN_DELETE)
+			  my_syslog(LOG_INFO, _("inotify: %s removed"), ah->fname);
+			else 
+			  my_syslog(LOG_INFO, _("inotify: %s new or modified"), ah->fname);
+
+			if (removed > 0)
+			  my_syslog(LOG_INFO, _("inotify: flushed %u names read from %s"), removed, ah->fname);
+			
+			/* (Re-)load hostsfile only if this event isn't triggered by deletion */
+			if (!(in->mask & IN_DELETE))
+			  read_hostsfile(ah->fname, ah->index, 0, NULL, 0);
 #ifdef HAVE_DHCP
-			    if (daemon->dhcp || daemon->doing_dhcp6) 
-			      {
-				/* Propagate 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 (dd->flags & AH_DHCP_HST)
-		      {
-			if (option_read_dynfile(path, AH_DHCP_HST))
+			if (daemon->dhcp || daemon->doing_dhcp6) 
 			  {
 			    /* Propagate the consequences of loading a new dhcp-host */
 			    dhcp_update_configs(daemon->dhcp_conf);
@@ -334,17 +329,43 @@ int inotify_check(time_t now)
 			    lease_update_file(now); 
 			    lease_update_dns(1);
 			  }
-		      }
-		    else if (dd->flags & AH_DHCP_OPT)
-		      option_read_dynfile(path, AH_DHCP_OPT);
 #endif
-		    
-		    if (!ah)
-		      free(path);
+		      }
 		  }
+#ifdef HAVE_DHCP
+		else if (!(in->mask & IN_DELETE))
+		  {
+		    char *path;
+
+		    if ((path = whine_malloc(strlen(dd->dname) + in->len + 2)))
+		      {
+			strcpy(path, dd->dname);
+			strcat(path, "/");
+			strcat(path, in->name);
+			
+			my_syslog(LOG_INFO, _("inotify: %s new or modified"), path);
+
+			if ((dd->flags & AH_DHCP_HST) && option_read_dynfile(path, AH_DHCP_HST))
+			  {
+			    /* Propagate 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);
+			  }
+			
+			if (dd->flags & AH_DHCP_OPT)
+			  option_read_dynfile(path, AH_DHCP_OPT);
+		    
+			free(path);
+		      }
+		  }
+#endif
+		
 	      }
 	}
     }
+  
   return hit;
 }
 

src/ipset.c

@@ -16,7 +16,7 @@
 
 #include "dnsmasq.h"
 
-#if defined(HAVE_IPSET)
+#if defined(HAVE_LINUX_IPSET)
 
 #include <string.h>
 #include <errno.h>

src/network.c

@@ -1568,6 +1568,8 @@ void check_servers(int no_loop_check)
   struct serverfd *sfd, *tmp, **up;
   int port = 0, count;
   int locals = 0;
+
+  (void)no_loop_check;
   
 #ifdef HAVE_LOOP
   if (!no_loop_check)
@@ -1775,8 +1777,10 @@ int reload_servers(char *fname)
 /* Called when addresses are added or deleted from an interface */
 void newaddress(time_t now)
 {
+#ifdef HAVE_DHCP
   struct dhcp_relay *relay;
-
+#endif
+  
   (void)now;
   
   if (option_bool(OPT_CLEVERBIND) || option_bool(OPT_LOCAL_SERVICE) ||

src/option.c

@@ -196,6 +196,7 @@ struct myoption {
 #define LOPT_NO_ENCODE     387
 #define LOPT_DO_ENCODE     388
 #define LOPT_LEASEQUERY    389
+#define LOPT_SPLIT_RELAY   390
 
 #ifdef HAVE_GETOPT_LONG
 static const struct option opts[] =  
@@ -374,6 +375,7 @@ static const struct myoption opts[] =
     { "dnssec-timestamp", 1, 0, LOPT_DNSSEC_STAMP },
     { "dnssec-limits", 1, 0, LOPT_DNSSEC_LIMITS },
     { "dhcp-relay", 1, 0, LOPT_RELAY },
+    { "dhcp-split-relay", 1, 0, LOPT_SPLIT_RELAY },
     { "ra-param", 1, 0, LOPT_RA_PARAM },
     { "quiet-dhcp", 0, 0, LOPT_QUIET_DHCP },
     { "quiet-dhcp6", 0, 0, LOPT_QUIET_DHCP6 },
@@ -542,6 +544,7 @@ static struct {
   { LOPT_GEN_NAMES, ARG_DUP, "[=tag:<tag>]", gettext_noop("Generate hostnames based on MAC address for nameless clients."), NULL},
   { LOPT_PROXY, ARG_DUP, "[=<ipaddr>]...", gettext_noop("Use these DHCP relays as full proxies."), NULL },
   { LOPT_RELAY, ARG_DUP, "<local-addr>,<server>[,<iface>]", gettext_noop("Relay DHCP requests to a remote server"), NULL},
+  { LOPT_SPLIT_RELAY, ARG_DUP, "<local-addr>,<server>,<iface>", gettext_noop("Relay DHCP requests to a remote server"), NULL},
   { LOPT_CNAME, ARG_DUP, "<alias>,<target>[,<ttl>]", gettext_noop("Specify alias name for LOCAL DNS name."), NULL },
   { LOPT_PXE_PROMT, ARG_DUP, "<prompt>,[<timeout>]", gettext_noop("Prompt to send to PXE clients."), NULL },
   { LOPT_PXE_SERV, ARG_DUP, "<service>", gettext_noop("Boot service for PXE menu."), NULL },
@@ -2917,13 +2920,17 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       break;
 
 #ifdef HAVE_DHCP
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+# if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+# endif
     case LOPT_LEASEQUERY:
       set_option_bool(OPT_LEASEQUERY);
       if (!arg)
 	break;
-#pragma GCC diagnostic pop
+# if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
+# pragma GCC diagnostic pop
+# endif
 #endif
     case 'B':  /* --bogus-nxdomain */
     case LOPT_IGNORE_ADDR: /* --ignore-address */
@@ -4712,11 +4719,21 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       break;
       
     case LOPT_RELAY: /* --dhcp-relay */
+    case LOPT_SPLIT_RELAY: /* --dhcp-splt-relay */
       {
 	struct dhcp_relay *new = opt_malloc(sizeof(struct dhcp_relay));
 	char *two = split(arg);
 	char *three = split(two);
-	
+
+	if (option == LOPT_SPLIT_RELAY)
+	  {
+	    new->split_mode = 1;
+	    
+	    /* split mode must have two addresses and a non-wildcard interface name. */
+	    if (!three || strchr(three, '*'))
+	      two = NULL;
+	  }
+		    
 	new->iface_index = 0;
 
 	if (two)
@@ -4739,12 +4756,15 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 		    else
 		      three = two;
 		  }
+		else if (new->split_mode && inet_pton(AF_INET, three, &new->uplink))
+		  /* Third arg in split mode can be an address. */
+		  three = NULL;
 		
 		new->next = daemon->relay4;
 		daemon->relay4 = new;
 	      }
 #ifdef HAVE_DHCP6
-	    else if (inet_pton(AF_INET6, arg, &new->local))
+	    else if (inet_pton(AF_INET6, arg, &new->local) && !new->split_mode)
 	      {
 		char *hash = split_chr(two, '#');
 
@@ -4765,7 +4785,9 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 		daemon->relay6 = new;
 	      }
 #endif
-
+	    else
+	      two = NULL;
+	    
 	    new->interface = opt_string_alloc(three);
 	  }
 	
@@ -6258,6 +6280,8 @@ void read_opts(int argc, char **argv, char *compile_opts)
 	    strchr(srv->name, '.') && 
 	    strchr(srv->name, '.') == strrchr(srv->name, '.'))
 	  {
+	    if (strlen(srv->name) + 1 + strlen(daemon->domain_suffix) > MAXDNAME)
+	      die(_("srv-host name %s too long after domain appended"), srv->name, EC_MISC);
 	    strcpy(buff, srv->name);
 	    strcat(buff, ".");
 	    strcat(buff, daemon->domain_suffix);

src/rfc1035.c

@@ -415,6 +415,7 @@ int private_net(struct in_addr addr, int ban_localhost)
     (((ip_addr & 0xFF000000) == 0x7F000000) && ban_localhost)  /* 127.0.0.0/8    (loopback) */ ||
     (((ip_addr & 0xFF000000) == 0x00000000) && ban_localhost) /* RFC 5735 section 3. "here" network */ ||
     ((ip_addr & 0xFF000000) == 0x0A000000)  /* 10.0.0.0/8     (private)  */ ||
+    ((ip_addr & 0xFFC00000) == 0x64400000)  /* 100.64.0.0/10  (CG-NAT) RFC6598/RFC7793*/ ||
     ((ip_addr & 0xFFF00000) == 0xAC100000)  /* 172.16.0.0/12  (private)  */ ||
     ((ip_addr & 0xFFFF0000) == 0xC0A80000)  /* 192.168.0.0/16 (private)  */ ||
     ((ip_addr & 0xFFFF0000) == 0xA9FE0000)  /* 169.254.0.0/16 (zeroconf) */ ||
@@ -515,7 +516,7 @@ int do_doctor(struct dns_header *header, size_t qlen, char *namebuff)
    Cache said SOA and return the difference in length between name and the name of the 
    SOA RR so we can look it up again.
 */
-static int find_soa(struct dns_header *header, size_t qlen, char *name, int *substring, unsigned long *ttlp, int no_cache, time_t now)
+static int find_soa(struct dns_header *header, size_t qlen, char *name, int *substring, unsigned long *ttlp, int cache, time_t now)
 {
   unsigned char *p, *psave;
   int qtype, qclass, rdlen;
@@ -555,7 +556,7 @@ static int find_soa(struct dns_header *header, size_t qlen, char *name, int *sub
 	    {
 	      int prefix = name_len - soa_len;
 	      
-	      if (!no_cache)
+	      if (cache)
 		{
 		  if (!(addr.rrblock.rrdata = blockdata_alloc(NULL, 0)))
 		    return 0;
@@ -567,12 +568,12 @@ static int find_soa(struct dns_header *header, size_t qlen, char *name, int *sub
 		{
 		  if (!extract_name(header, qlen, &p, daemon->workspacename, EXTR_NAME_EXTRACT, 0))
 		    {
-		      if (!no_cache)
+		      if (cache)
 			blockdata_free(addr.rrblock.rrdata);
 		      return 0;
 		    }
 		  
-		  if (!no_cache)
+		  if (cache)
 		    {
 		      len = to_wire(daemon->workspacename);
 		      if (!blockdata_expand(addr.rrblock.rrdata, addr.rrblock.datalen, daemon->workspacename, len))
@@ -587,13 +588,13 @@ static int find_soa(struct dns_header *header, size_t qlen, char *name, int *sub
 
 	      if (!CHECK_LEN(header, p, qlen, 20))
 		{
-		  if (!no_cache)
+		  if (cache)
 		    blockdata_free(addr.rrblock.rrdata);
 		  return 0;
 		}
 	      
 	      /* rest of RR */
-	      if (!no_cache)
+	      if (cache)
 		{
 		  int secflag = 0;
 
@@ -687,12 +688,12 @@ static int log_txt(char *name, unsigned char *p, const int ardlen, int flag)
    Return 2 if the packet is malformed.
 */
 int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t now, 
-		      struct ipsets *ipsets, struct ipsets *nftsets, int is_sign, int check_rebind,
+		      struct ipsets *ipsets, struct ipsets *nftsets, int check_rebind,
 		      int no_cache_dnssec, int secure)
 {
   unsigned char *p, *p1, *endrr, *namep;
   int j, qtype, qclass, aqtype, aqclass, ardlen, res;
-  unsigned long ttl = 0;
+  unsigned long ttl;
   union all_addr addr;
 #ifdef HAVE_IPSET
   char **ipsets_cur;
@@ -704,13 +705,8 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 #else
   (void)nftsets; /* unused */
 #endif
-  int found = 0, cname_count = CNAME_CHAIN;
-  struct crec *cpp = NULL;
+  int name_encoding, found = 0, ptr = 0;
   int flags = RCODE(header) == NXDOMAIN ? F_NXDOMAIN : 0;
-#ifdef HAVE_DNSSEC
-  int cname_short = 0;
-#endif
-  unsigned long cttl = ULONG_MAX, attl;
 
   cache_start_insert();
 
@@ -724,125 +720,73 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
   
   if (qclass != C_IN)
     return 0;
-  
-  /* PTRs: we chase CNAMEs here, since we have no way to 
-     represent them in the cache. */
-  if (qtype == T_PTR)
+
+  /* If the PTR record encodes an address, store using a name/address record with F_REVERSE set.
+     Otherwise, it gets stored as an arbitrary RR below. If the query is answerable with
+     a CNAME, also take the arbitrary-RR route, since the cache can't represent a CNAME
+     whose target is stored in a F_REVERSE record. */
+  if (qtype == T_PTR && !(flags & F_NXDOMAIN) && (name_encoding = in_arpa_name_2_addr(name, &addr)))
     { 
-      int insert = 1, name_encoding = in_arpa_name_2_addr(name, &addr);
+      ptr = 1;
       
-      if (!(flags & F_NXDOMAIN))
+      if (!(p1 = skip_questions(header, qlen)))
+	return 2;
+      
+      for (j = 0; j < ntohs(header->ancount); j++) 
 	{
-	cname_loop:
-	  if (!(p1 = skip_questions(header, qlen)))
-	    return 2;
+	  int secflag = 0;
+	  if (!(res = extract_name(header, qlen, &p1, name, EXTR_NAME_COMPARE, 10)))
+	    return 2; /* bad packet */
 	  
-	  for (j = 0; j < ntohs(header->ancount); j++) 
+	  GETSHORT(aqtype, p1); 
+	  GETSHORT(aqclass, p1);
+	  p = p1;
+	  GETLONG(ttl, p1);
+	  GETSHORT(ardlen, p1);
+	  endrr = p1+ardlen;
+	  
+	  if (aqclass == C_IN && res == 1 && aqtype == T_PTR)
 	    {
-	      int secflag = 0;
-	      if (!(res = extract_name(header, qlen, &p1, name, EXTR_NAME_COMPARE, 10)))
-		return 2; /* bad packet */
+	      found = 1;
+
+	      if ((daemon->max_ttl != 0) && (ttl > daemon->max_ttl))
+		ttl = daemon->max_ttl;
 	      
-	      GETSHORT(aqtype, p1); 
-	      GETSHORT(aqclass, p1);
-	      GETLONG(attl, p1);
-	      
-	      if ((daemon->max_ttl != 0) && (attl > daemon->max_ttl) && !is_sign)
-		{
-		  (p1) -= 4;
-		  PUTLONG(daemon->max_ttl, p1);
-		}
-	      GETSHORT(ardlen, p1);
-	      endrr = p1+ardlen;
-	      
-	      /* TTL of record is minimum of CNAMES and PTR */
-	      if (attl < cttl)
-		cttl = attl;
-	      
-	      if (aqclass == C_IN && res != 2 && (aqtype == T_CNAME || aqtype == T_PTR))
-		{
 #ifdef HAVE_DNSSEC
-		  if (option_bool(OPT_DNSSEC_VALID) && j < daemon->rr_status_sz && daemon->rr_status[j] != 0)
-		    {
-		      /* validated RR anywhere in CNAME chain, don't cache. */
-		      if (cname_short || aqtype == T_CNAME)
-			insert = 0;
-		      
-		      secflag = F_DNSSECOK;
-		      /* limit TTL based on signature. */
-		      if (daemon->rr_status[j] < cttl)
-			cttl = daemon->rr_status[j];
-		    }
-#endif
-
-		  if (aqtype == T_CNAME)
-		    log_query(secflag | F_CNAME | F_FORWARD | F_UPSTREAM, name, NULL, NULL, 0);
-		  
-		  if (!extract_name(header, qlen, &p1, name, EXTR_NAME_EXTRACT, 0))
-		    return 2;
-		  
-		  if (aqtype == T_CNAME)
-		    {
-		      if (!cname_count--)
-			return 0; /* looped CNAMES, we can't cache. */
-#ifdef HAVE_DNSSEC
-		      cname_short = 1;
-#endif
-		      goto cname_loop;
-		    }
-		  
-		  found = 1; 
-		  
-		  if (!name_encoding)
-		    log_query(secflag | F_FORWARD | F_UPSTREAM, name, NULL, NULL, aqtype);
-		  else
-		    {
-		      log_query(name_encoding | secflag | F_REVERSE | F_UPSTREAM, name, &addr, NULL, 0);
-		      if (insert)
-			cache_insert(name, &addr, C_IN, now, cttl, name_encoding | secflag | F_REVERSE);
-		    }
-		}
-
-	      p1 = endrr;
-	      if (!CHECK_LEN(header, p1, qlen, 0))
-		return 2; /* bad packet */
-	    }
-	}
-      
-      if (!found)
-	{
-	  flags |= F_NEG | (secure ?  F_DNSSECOK : 0);
-
-	  if (name_encoding)
-	    flags |= F_REVERSE | name_encoding;
-
-	  log_query(flags | F_UPSTREAM, name, &addr, NULL, 0);
-
-	  if (name_encoding && !option_bool(OPT_NO_NEG))
-	    {
-	      /* For reverse records, we use the name field to store the SOA name. */
-	      int substring, have_soa = find_soa(header, qlen, name, &substring, &ttl, no_cache_dnssec, now);
-
-	      if (have_soa || daemon->neg_ttl)
+	      if (option_bool(OPT_DNSSEC_VALID) && j < daemon->rr_status_sz && daemon->rr_status[j] != 0)
 		{
-		  /* If daemon->neg_ttl is set, we can cache even without an SOA. */
-		  if (!have_soa)
-		    {
-		      flags |= F_NO_RR; /* Marks no SOA found. */
-		      ttl = daemon->neg_ttl;
-		    }
-		  
-		  cache_insert(name + substring, &addr, C_IN, now, ttl, flags);
+		  secflag = F_DNSSECOK;
+		  /* limit TTL based on signature. */
+		  if (daemon->rr_status[j] < ttl)
+		    ttl = daemon->rr_status[j];
 		}
+#endif
+	      
+	      PUTLONG(ttl, p);
+
+	      if (!extract_name(header, qlen, &p1, name, EXTR_NAME_EXTRACT, 0))
+		return 2;
+	      log_query(name_encoding | secflag | F_REVERSE | F_UPSTREAM, name, &addr, NULL, 0);
+	      cache_insert(name, &addr, C_IN, now, ttl, name_encoding | secflag | F_REVERSE);
+	      
+	      /* restore query into name */
+	      p1 = namep;
+	      if (!extract_name(header, qlen, &p1, name, EXTR_NAME_EXTRACT, 0))
+		return 2;
 	    }
+	  
+	  p1 = endrr;
+	  if (!CHECK_LEN(header, p1, qlen, 0))
+	    return 2; /* bad packet */
 	}
     }
-  else
+
+  if (!ptr || !found)
     {
       /* everything other than PTR */
-      struct crec *newc;
-      int addrlen = 0, insert = 1;
-      
+      struct crec *newc, *cpp = NULL;
+      int cname_count = CNAME_CHAIN, addrlen = 0, insert = 1;
+            
       if (qtype == T_A)
 	{
 	  addrlen = INADDRSZ;
@@ -854,12 +798,12 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	  flags |= F_IPV6;
 	}
       else if (qtype != T_CNAME &&
-	       (qtype == T_SRV || rr_on_list(daemon->cache_rr, qtype) || rr_on_list(daemon->cache_rr, T_ANY)))
+	       (qtype == T_SRV || qtype == T_PTR || rr_on_list(daemon->cache_rr, qtype) || rr_on_list(daemon->cache_rr, T_ANY)))
 	flags |= F_RR;
       else
 	insert = 0; /* NOTE: do not cache data from CNAME queries. */
       
-    cname_loop1:
+    cname_loop:
       if (!(p1 = skip_questions(header, qlen)))
 	return 2;
       
@@ -872,12 +816,8 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	  
 	  GETSHORT(aqtype, p1); 
 	  GETSHORT(aqclass, p1);
-	  GETLONG(attl, p1);
-	  if ((daemon->max_ttl != 0) && (attl > daemon->max_ttl) && !is_sign)
-	    {
-	      (p1) -= 4;
-	      PUTLONG(daemon->max_ttl, p1);
-	    }
+	  p = p1;
+	  GETLONG(ttl, p1);
 	  GETSHORT(ardlen, p1);
 	  endrr = p1+ardlen;
 
@@ -890,6 +830,9 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	      p1 = endrr;
 	      continue;
 	    }
+
+	  if ((daemon->max_ttl != 0) && (ttl > daemon->max_ttl))
+	    ttl = daemon->max_ttl;
 	  
 #ifdef HAVE_DNSSEC
 	  if (option_bool(OPT_DNSSEC_VALID) && j < daemon->rr_status_sz && daemon->rr_status[j] != 0)
@@ -897,10 +840,12 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	      secflag = F_DNSSECOK;
 	      
 	      /* limit TTl based on sig. */
-	      if (daemon->rr_status[j] < attl)
-		attl = daemon->rr_status[j];
+	      if (daemon->rr_status[j] < ttl)
+		ttl = daemon->rr_status[j];
 	    }
 #endif	  
+
+	  PUTLONG(ttl, p);
 	  
 	  if (aqtype == T_CNAME)
 	    {
@@ -911,7 +856,7 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	      
 	      if (insert)
 		{
-		  if ((newc = cache_insert(name, NULL, C_IN, now, attl, F_CNAME | F_FORWARD | secflag)))
+		  if ((newc = cache_insert(name, NULL, C_IN, now, ttl, F_CNAME | F_FORWARD | secflag)))
 		    {
 		      newc->addr.cname.target.cache = NULL;
 		      newc->addr.cname.is_name_ptr = 0; 
@@ -924,16 +869,15 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 		    }
 		  
 		  cpp = newc;
-		  if (attl < cttl)
-		    cttl = attl;
 		}
 	      
+	      /* Set the query to the CNAME target and go again unless the query was just for a CNAME. */
 	      namep = p1;
 	      if (!extract_name(header, qlen, &p1, name, EXTR_NAME_EXTRACT, 0))
 		return 2;
 	      
 	      if (qtype != T_CNAME)
-		goto cname_loop1;
+		goto cname_loop;
 
 	      found = 1;
 	    }
@@ -1089,7 +1033,7 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	      
 	      if (insert)
 		{
-		  newc = cache_insert(name, &addr, C_IN, now, attl, flags | F_FORWARD | secflag);
+		  newc = cache_insert(name, &addr, C_IN, now, ttl, flags | F_FORWARD | secflag);
 		  if (newc && cpp)
 		    {
 		      next_uid(newc);
@@ -1135,7 +1079,17 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 	  
 	  if (insert && !option_bool(OPT_NO_NEG))
 	    {
-	      int substring, have_soa = find_soa(header, qlen, name, &substring, &ttl, no_cache_dnssec, now);
+	      /* The order of records going into the cache matters (see  cache_recv_insert()).
+		 The target of a CNAME must immediately follow the CNAME.
+		 (CNAME has already gone into the cache at this point)
+		 Here we call find_soa to get the ttl and substring, but
+		 we DON'T LET IT INSERT the SOA into the cache if our negative record is a CNAME target
+		 so that the SOA doesn't come before the CNAME target.
+
+		 We call find_soa() again after inserting the CNAME target to insert the SOA
+		 if necessary. */
+
+	      int substring, have_soa = find_soa(header, qlen, name, &substring, &ttl, cpp == NULL, now);
 	      
 	      if (have_soa || daemon->neg_ttl)
 		{		  
@@ -1157,6 +1111,10 @@ int extract_addresses(struct dns_header *header, size_t qlen, char *name, time_t
 		      next_uid(newc);
 		      cpp->addr.cname.target.cache = newc;
 		      cpp->addr.cname.uid = newc->uid;
+		    
+		      /* we didn't insert the SOA before a CNAME target above, do it now. */
+		      if (have_soa)
+			find_soa(header, qlen, name, NULL, NULL, 1, now);
 		    }
 		}
 	    }
@@ -1301,12 +1259,10 @@ unsigned int extract_request(struct dns_header *header, size_t qlen, char *name,
 	return  F_IPV4 | F_IPV6;
     }
 
-#ifdef HAVE_DNSSEC
   /* Make the behaviour for DS and DNSKEY queries we forward the same
      as for DS and DNSKEY queries we originate. */
-  if (option_bool(OPT_DNSSEC_VALID) && (qtype == T_DS || qtype == T_DNSKEY))
-    return F_DNSSECOK;
-#endif
+  if (qtype == T_DS || qtype == T_DNSKEY)
+    return F_DNSSECOK | (qtype == T_DS ? F_DS : 0);
   
   return F_QUERY;
 }
@@ -1668,7 +1624,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
   int rd_bit = (header->hb3 & HB3_RD);
   int count = 255; /* catch loops */
 
-  /* Suppress cached answers of no_cache set. */
+  /* Suppress cached answers if no_cache set. */
   if (no_cache)
     rd_bit = 0;
   
@@ -1678,14 +1634,12 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
   if (filtered)
     *filtered = 0;
   
-  /* never answer queries with RD unset, to avoid cache snooping. */
-  if ( ntohs(header->qdcount) != 1 ||
-       ntohs(header->ancount) != 0 ||
+  if (ntohs(header->qdcount) != 1 ||
+      ntohs(header->ancount) != 0 ||
       ntohs(header->nscount) != 0 ||
-      ntohs(header->qdcount) == 0 ||
       OPCODE(header) != QUERY )
     return 0;
-
+  
   /* Don't return AD set if checking disabled. */
   if (header->hb4 & HB4_CD)
     sec_data = 0;
@@ -2348,14 +2302,11 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
      
      For FORWARD NEG records, the addr.rrdata.datalen field of the othewise
      empty addr is used to held an offset in to the name which yields the SOA
-     name. For REVERSE NEG records, the otherwise empty name field holds the
-     SOA name. If soa_name has zero length, then no SOA is known. soa_lookup
-     MUST be a neg record here.
-     
+     name.
      If the F_NO_RR flag is set, there was no SOA record supplied with the RR.  */
   if (soa_lookup && !(soa_lookup->flags & F_NO_RR))
     {
-      char *soa_name = soa_lookup->flags & F_REVERSE ? cache_get_name(soa_lookup) : name + soa_lookup->addr.rrdata.datalen;
+      char *soa_name = name + soa_lookup->addr.rrdata.datalen;
       
       crecp = NULL;
       while ((crecp = cache_find_by_name(crecp, soa_name, now, F_RR)))

src/rfc2131.c

@@ -204,6 +204,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	      memcpy(agent_id, opt, total);
 	    }
 
+	  /* look for RFC5010 flags sub-option */
+	  if ((sopt = option_find1(option_ptr(opt, 0), option_ptr(opt, option_len(opt)), SUBOPT_FLAGS, INADDRSZ)))
+	    unicast_dest = !!(option_uint(opt, 0, 1) & 0x80);
+	      
 	  /* look for RFC3527 Link selection sub-option */
 	  if ((sopt = option_find1(option_ptr(opt, 0), option_ptr(opt, option_len(opt)), SUBOPT_SUBNET_SELECT, INADDRSZ)))
 	    subnet_addr = option_addr(sopt);
@@ -289,6 +293,8 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	{
 	  addr = subnet_addr;
 	  force = 1;
+	  if (mess->giaddr.s_addr)
+	    via_relay = 1;
 	}
       else if (mess->giaddr.s_addr)
 	{
@@ -357,7 +363,12 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 		  if (context_tmp->local.s_addr == 0)
 		    context_tmp->local = fallback;
 		  if (context_tmp->router.s_addr == 0 && !share)
-		    context_tmp->router = mess->giaddr;
+		    {
+		      if (override.s_addr)
+			context_tmp->router = override;
+		      else
+			context_tmp->router = mess->giaddr;
+		    }
 		  
 		  /* fill in missing broadcast addresses for relayed ranges */
 		  if (!(context_tmp->flags & CONTEXT_BRDCAST) && context_tmp->broadcast.s_addr == 0 )
@@ -3044,4 +3055,207 @@ static void apply_delay(u32 xid, time_t recvtime, struct dhcp_netid *netid)
     }
 }
 
+void relay_upstream4(struct in_addr iface_addr, int iface_index, struct dhcp_packet *mess, size_t sz, int unicast)
+{
+  struct in_addr giaddr = mess->giaddr;
+  u8 hops = mess->hops;
+  struct dhcp_relay *relay;
+  size_t orig_sz = sz;
+  unsigned char *endopt = NULL;
+    
+  if (mess->op != BOOTREQUEST || (mess->hops++) > 20)
+    return;
+  
+  for (relay = daemon->relay4; relay; relay = relay->next)
+    {
+      union mysockaddr to;
+      union all_addr from;
+      struct ifreq ifr;
+
+      /* restore orig packet */
+      mess->giaddr = giaddr;
+      if (endopt)
+	*endopt = OPTION_END;
+      sz = orig_sz;
+
+      if (relay->interface)
+	{
+	  safe_strncpy(ifr.ifr_name, relay->interface, IF_NAMESIZE);
+	  ifr.ifr_addr.sa_family = AF_INET;
+	}
+      
+      if (!relay->split_mode && relay->iface_index && relay->iface_index == iface_index)
+	{
+	  /* already gatewayed ? */
+	  if (giaddr.s_addr)
+	    {
+	      /* if so check if by us, to stomp on loops. */
+	      if (giaddr.s_addr == relay->local.addr4.s_addr)
+		continue;
+	    }
+	  else
+	    /* plug in our address */
+	    mess->giaddr = relay->local.addr4;
+	  
+	  from.addr4 = relay->local.addr4;
+	}
+      else if (relay->split_mode && relay->local.addr4.s_addr == iface_addr.s_addr)
+	{
+	  /* Split mode. We put our address on the server-facing interface
+	     or a directly specified third address into giaddr for the server to talk back to us on.
+	     
+	     Our address on client-facing interface goes into agent-id subnet-selector subopt,
+	     so that the server allocates the correct address. We also send a
+	     remote-id with the interface on which the request arrived,
+	     so that we can send the reply back the same way. */
+	  unsigned int net_index = htonl(iface_index);
+	  
+	  if (relay->interface)
+	    {
+	      /* get our address on the server-facing interface. */
+	      if (ioctl(daemon->dhcpfd, SIOCGIFADDR, &ifr) == -1)
+		continue;
+	      relay->uplink.addr4 = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
+	    }
+	  
+	  /* already gatewayed ? */
+	  if (giaddr.s_addr)
+	    {
+	      /* if so check if by us, to stomp on loops. */
+	      if (giaddr.s_addr == relay->uplink.addr4.s_addr)
+		continue;
+	    }
+	  else
+	    {
+	      /* giaddr is our address on the outgoing interface in split mode. */
+	      mess->giaddr = relay->uplink.addr4;
+	      
+	      if (!endopt)
+		{
+		  /* Add an RFC3026 relay agent information option (2 bytes) at the very end of the options.
+		     Said option to contain a RFC 3527 link selection sub option (6 bytes) and
+		     RFC 5017 serverid-override option (6 bytes) and RFC5010 flags (3 bytes) and
+		     an RFC3046 remote-id which holds an interface index (6 bytes)
+		     
+		     New END option is a 24th byte, so we need 24 bytes free.
+		     We only need to do this once, and poke the address/interface/flags into the same place each time. */
+		  
+		  if (!(endopt = option_find1((&mess->options[0] + sizeof(u32)), ((unsigned char *)mess) + sz, OPTION_END, 0)) ||
+		      (endopt + 24 > (unsigned char *)(mess + 1)))
+		    continue;
+		  
+		  endopt[1] = 21; /* length */
+		  endopt[2] = SUBOPT_SUBNET_SELECT;
+		  endopt[3] = 4; /* length */
+		  endopt[8] = SUBOPT_SERVER_OR;
+		  endopt[9] = 4;
+		  endopt[14] = SUBOPT_FLAGS;
+		  endopt[15] = 1; /* length */
+		  endopt[17] = SUBOPT_REMOTE_ID;
+		  endopt[18] = 4; /* length */
+		  endopt[23] = OPTION_END;
+		  sz = (endopt - (unsigned char *)mess) + 24;
+		}
+	      
+	      /* IP address is already in network byte order */
+	      memcpy(&endopt[4], &relay->local.addr4.s_addr, INADDRSZ);
+	      memcpy(&endopt[10], &relay->local.addr4.s_addr, INADDRSZ);
+	      endopt[16] = unicast ? 0x80 : 0x00;
+	      memcpy(&endopt[19], &net_index, 4);
+	      endopt[0] = OPTION_AGENT_ID;
+	    }
+	  
+	  from.addr4 = relay->uplink.addr4;
+	}
+      else
+	continue;
+	
+      to.sa.sa_family = AF_INET;
+      to.in.sin_addr = relay->server.addr4;
+      to.in.sin_port = htons(relay->port);
+#ifdef HAVE_SOCKADDR_SA_LEN
+      to.in.sin_len = sizeof(struct sockaddr_in);
+#endif
+      
+      /* Broadcasting to server. */
+      if (relay->server.addr4.s_addr == 0)
+	{
+	  if (ioctl(daemon->dhcpfd, SIOCGIFBRDADDR, &ifr) == -1)
+	    {
+	      my_syslog(MS_DHCP | LOG_ERR, _("Cannot broadcast DHCP relay via interface %s: %s"), relay->interface, strerror(errno));
+	      continue;
+	    }
+	  
+	  to.in.sin_addr = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
+	}
+      
+#ifdef HAVE_DUMPFILE
+      {
+	union mysockaddr fromsock;
+	fromsock.in.sin_port = htons(daemon->dhcp_server_port);
+	fromsock.in.sin_addr = from.addr4;
+	fromsock.sa.sa_family = AF_INET;
+	
+	dump_packet_udp(DUMP_DHCP, (void *)mess, sz, &fromsock, &to, -1);
+      }
+#endif
+      
+      send_from(daemon->dhcpfd, 0, (char *)mess, sz, &to, &from, 0);
+      
+      if (option_bool(OPT_LOG_OPTS))
+	{
+	  inet_ntop(AF_INET, &relay->local, daemon->addrbuff, ADDRSTRLEN);
+	  if (relay->server.addr4.s_addr == 0)
+	    snprintf(daemon->dhcp_buff2, DHCP_BUFF_SZ, _("broadcast via %s"), relay->interface);
+	  else
+	    inet_ntop(AF_INET, &relay->server.addr4, daemon->dhcp_buff2, DHCP_BUFF_SZ);
+	  my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay at %s -> %s"), daemon->addrbuff, daemon->dhcp_buff2);
+	}
+    }
+  
+  /* restore in case of a local reply. */
+  mess->hops = hops;
+  mess->giaddr = giaddr;
+  if (endopt)
+    *endopt = OPTION_END;
+}
+
+unsigned int relay_reply4(struct dhcp_packet *mess, size_t sz, char *arrival_interface)
+{
+  struct dhcp_relay *relay;
+    
+  if (mess->giaddr.s_addr == 0 || mess->op != BOOTREPLY)
+    return 0;
+
+  for (relay = daemon->relay4; relay; relay = relay->next)
+    {
+      unsigned int return_iface = 0;
+
+      if (relay->split_mode)
+	{
+	  unsigned char *opt, *sopt;
+	  
+	  /* giaddr is our address on the returning interface in split mode. */
+	  if (mess->giaddr.s_addr == relay->uplink.addr4.s_addr &&
+	      (opt = option_find(mess, sz, OPTION_AGENT_ID, 1)))
+	    {
+	      if ((sopt = option_find1(option_ptr(opt, 0), option_ptr(opt, option_len(opt)), SUBOPT_REMOTE_ID, sizeof(unsigned int))))
+		return_iface = option_uint(sopt, 0, sizeof(unsigned int));
+
+	      /* delete agent info before return RFC 3046 para 2.1 */
+	      *opt = OPTION_END;
+	      memset(opt + 1, 0, option_len(opt) + 2);
+	    }
+	}
+      else if (mess->giaddr.s_addr == relay->local.addr4.s_addr)
+	    return_iface = relay->iface_index;
+      
+      if (return_iface && (!relay->interface || wildcard_match(relay->interface, arrival_interface)))
+	return return_iface;
+    }
+  
+  return 0;	 
+}     
+
+
 #endif /* HAVE_DHCP */

src/rfc3315.c

@@ -21,7 +21,7 @@
 
 struct state {
   unsigned char *clid;
-  int clid_len, ia_type, interface, hostname_auth, lease_allocate;
+  int multicast_dest, clid_len, ia_type, interface, hostname_auth, lease_allocate;
   char *client_hostname, *hostname, *domain, *send_domain;
   struct dhcp_context *context;
   struct in6_addr *link_address, *fallback, *ll_addr, *ula_addr;
@@ -68,7 +68,7 @@ static void calculate_times(struct dhcp_context *context, unsigned int *min_time
 #define opt6_user_vendor_next(opt, end) (opt6_next(((uint8_t *) opt) - 2, end))
  
 
-unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
+unsigned short dhcp6_reply(struct dhcp_context *context, int multicast_dest, int interface, char *iface_name,
 			   struct in6_addr *fallback,  struct in6_addr *ll_addr, struct in6_addr *ula_addr,
 			   size_t sz, struct in6_addr *client_addr, time_t now)
 {
@@ -87,6 +87,7 @@ unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *if
   
   reset_counter();
   state.context = context;
+  state.multicast_dest = multicast_dest;
   state.interface = interface;
   state.iface_name = iface_name;
   state.fallback = fallback;
@@ -244,7 +245,11 @@ static int dhcp6_maybe_relay(struct state *state, unsigned char *inbuff, size_t
 	      struct in6_addr align;
 	      /* the packet data is unaligned, copy to aligned storage */
 	      memcpy(&align, inbuff + 2, IN6ADDRSZ); 
-	      state->link_address = &align;
+
+
+	      /* RFC6221 para 4 */
+	      if (!IN6_IS_ADDR_UNSPECIFIED(&align))
+		state->link_address = &align;
 	      /* zero is_unicast since that is now known to refer to the 
 		 relayed packet, not the original sent by the client */
 	      if (!dhcp6_maybe_relay(state, opt6_ptr(opt, 0), opt6_len(opt), client_addr, 0, now))
@@ -333,20 +338,24 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
   else if (msg_type != DHCP6IREQ)
     return 0;
 
-  /* server-id must match except for SOLICIT, CONFIRM and REBIND messages, which MUST NOT
-     have a server-id.  3315 para 15.x */
   opt = opt6_find(state->packet_options, state->end, OPTION6_SERVER_ID, 1);
-
-  if (msg_type == DHCP6SOLICIT || msg_type == DHCP6CONFIRM || msg_type == DHCP6REBIND)
+  
+  if (msg_type == DHCP6SOLICIT || msg_type == DHCP6CONFIRM || msg_type == DHCP6REBIND || msg_type == DHCP6IREQ)
     {
-      if (opt)
+      /* Above message types must be multicast 3315 Section 15. */
+      if (!state->multicast_dest)
 	return 0;
-    }
-  else if (msg_type == DHCP6IREQ)
-    {
-      /* If server-id provided, it must match. */
-      if (opt && (opt6_len(opt) != daemon->duid_len ||
-		  memcmp(opt6_ptr(opt, 0), daemon->duid, daemon->duid_len) != 0))
+
+      /* server-id must match except for SOLICIT, CONFIRM and REBIND messages, which MUST NOT
+	 have a server-id.  3315 para 15.x */
+      if (msg_type == DHCP6IREQ)
+	{
+	  /* If server-id provided in IREQ, it must match. */
+	  if (opt && (opt6_len(opt) != daemon->duid_len ||
+		      memcmp(opt6_ptr(opt, 0), daemon->duid, daemon->duid_len) != 0))
+	    return 0;
+	}
+      else if (opt) 
 	return 0;
     }
   else
@@ -634,7 +643,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
       
     case DHCP6SOLICIT:
       {
-      	int address_assigned = 0;
+      	int address_assigned;
 	/* tags without all prefix-class tags */
 	struct dhcp_netid *solicit_tags;
 	struct dhcp_context *c;
@@ -653,6 +662,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
 
       request_no_address:
 	solicit_tags = tagif;
+	address_assigned = 0;
 	
 	if (ignore)
 	  return 0;
@@ -764,15 +774,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
 	    
 	    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
@@ -799,7 +800,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
 	    o = new_opt6(OPTION6_PREFERENCE);
 	    put_opt6_char(option_bool(OPT_AUTHORITATIVE) ? 255 : 0);
 	    end_opt6(o);
-	    tagif = add_options(state, 0);
 	  }
 	else
 	  { 
@@ -819,7 +819,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
 		  break;
 		}
 	  }
-
+	
+	tagif = add_options(state, 0);
 	break;
       }
       
@@ -977,8 +978,10 @@ static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbu
 		  {
 		    if (msg_type == DHCP6REBIND)
 		      {
-			/* When rebinding, we can create a lease if it doesn't exist. */
-			lease = lease6_allocate(&req_addr, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA);
+			/* When rebinding, we can create a lease if it doesn't exist, as long
+			   as --dhcp-authoritative is set. */
+			if (option_bool(OPT_AUTHORITATIVE))
+			  lease = lease6_allocate(&req_addr, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA);
 			if (lease)
 			  lease_set_iaid(lease, state->iaid);
 			else
@@ -2276,64 +2279,61 @@ int relay_reply6(struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface)
     {
       void *opt, *opts = inbuff + 34;
       void *end = inbuff + sz;
-      for (opt = opts; opt; opt = opt6_next(opt, end))
-	if (opt6_type(opt) == OPTION6_RELAY_MSG && opt6_len(opt) > 0)
-	  {
-	    int encap_type = *((unsigned char *)opt6_ptr(opt, 0));
-	    put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
-	    memcpy(&peer->sin6_addr, &inbuff[18], IN6ADDRSZ); 
-	    peer->sin6_scope_id = relay->iface_index;
-
-	    if (encap_type == DHCP6RELAYREPL)
-	      {
-		peer->sin6_port = ntohs(DHCPV6_SERVER_PORT);
-		return 1;
-	      }
-
-	    peer->sin6_port = ntohs(DHCPV6_CLIENT_PORT);
-	    
-#ifdef HAVE_SCRIPT
-	    if (daemon->lease_change_command && encap_type == DHCP6REPLY)
-	      {
-		/* decapsulate relayed message */
-		opts = opt6_ptr(opt, 4);
-		end = opt6_ptr(opt, opt6_len(opt));
-
-		for (opt = opts; opt; opt = opt6_next(opt, end))
-		  if (opt6_type(opt) == OPTION6_IA_PD && opt6_len(opt) > 12) 
-		    {
-		      void *ia_opts = opt6_ptr(opt, 12);
-		      void *ia_end = opt6_ptr(opt, opt6_len(opt));
-		      void *ia_opt;
-		      
-		      for (ia_opt = ia_opts; ia_opt; ia_opt = opt6_next(ia_opt, ia_end))
-			/* valid lifetime must not be zero. */
-			if (opt6_type(ia_opt) == OPTION6_IAPREFIX && opt6_len(ia_opt) >= 25 && opt6_uint(ia_opt, 4, 4) != 0)
-			  {
-			    if (daemon->free_snoops ||
-				(daemon->free_snoops = whine_malloc(sizeof(struct snoop_record))))
-			      {
-				struct snoop_record *snoop = daemon->free_snoops;
-				
-				daemon->free_snoops = snoop->next;
-				snoop->client = peer->sin6_addr;
-				snoop->prefix_len = opt6_uint(ia_opt, 8, 1); 
-				memcpy(&snoop->prefix, opt6_ptr(ia_opt, 9), IN6ADDRSZ); 
-				snoop->next = relay->snoop_records;
-				relay->snoop_records = snoop;
-			      }
-			  }
-		    }
-	      }
-#endif		
-	    return 1;
-	  }
       
+      if ((opt = opt6_find(opts, end, OPTION6_RELAY_MSG, 4)))
+	{
+	  int encap_type = opt6_uint(opt, 0, 1);
+	  put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
+	  memcpy(&peer->sin6_addr, &inbuff[18], IN6ADDRSZ); 
+	  peer->sin6_scope_id = relay->iface_index;
+
+	  if (encap_type == DHCP6RELAYREPL)
+	    {
+	      peer->sin6_port = ntohs(DHCPV6_SERVER_PORT);
+	      return 1;
+	    }
+	  
+	  peer->sin6_port = ntohs(DHCPV6_CLIENT_PORT);
+	  
+#ifdef HAVE_SCRIPT
+	  if (daemon->lease_change_command && encap_type == DHCP6REPLY)
+	    {
+	      /* skip over message type and transaction-id. to get to options. */
+	      opts = opt6_ptr(opt, 4);
+	      end = opt6_ptr(opt, opt6_len(opt));
+
+	      if ((opt = opt6_find(opts, end, OPTION6_IA_PD, 12)))
+		{
+		  opts = opt6_ptr(opt, 12);
+		  end = opt6_ptr(opt, opt6_len(opt));
+		  
+		  for (opt = opt6_find(opts, end, OPTION6_IAPREFIX, 25); opt; opt = opt6_find(opt6_next(opt, end), end, OPTION6_IAPREFIX, 25))
+		    /* valid lifetime must not be zero. */
+		    if (opt6_uint(opt, 4, 4) != 0)
+		      {
+			if (daemon->free_snoops ||
+			    (daemon->free_snoops = whine_malloc(sizeof(struct snoop_record))))
+			  {
+			    struct snoop_record *snoop = daemon->free_snoops;
+			    
+			    daemon->free_snoops = snoop->next;
+			    snoop->client = peer->sin6_addr;
+			    snoop->prefix_len = opt6_uint(opt, 8, 1); 
+			    memcpy(&snoop->prefix, opt6_ptr(opt, 9), IN6ADDRSZ); 
+			    snoop->next = relay->snoop_records;
+			    relay->snoop_records = snoop;
+			  }
+		      }
+		}	      
+	    }
+#endif
+	  return 1;
+	}
     }
   
   return 0;
 }
-
+  
 #ifdef HAVE_SCRIPT
 int do_snoop_script_run(void)
 {

src/tables.c

@@ -18,7 +18,7 @@
 
 #include "dnsmasq.h"
 
-#if defined(HAVE_IPSET) && defined(HAVE_BSD_NETWORK)
+#if defined(HAVE_BSD_IPSET)
 
 #include <string.h>
 

src/tftp.c

@@ -41,11 +41,11 @@ static void sanitise(char *buf);
 #define ERR_ILL    4
 #define ERR_TID    5
 
-void tftp_request(struct listener *listen, time_t now)
+static void tftp_request(struct listener *listen, time_t now)
 {
   ssize_t len;
   char *packet = daemon->packet;
-  char *filename, *mode, *p, *end, *opt;
+  char *filename, *mode, *p, *end;
   union mysockaddr addr, peer;
   struct msghdr msg;
   struct iovec iov;
@@ -198,11 +198,11 @@ void tftp_request(struct listener *listen, time_t now)
 
       name = namebuff;
       
-      addra.addr4 = addr.in.sin_addr;
-
       if (family == AF_INET6)
 	addra.addr6 = addr.in6.sin6_addr;
-
+      else
+	addra.addr4 = addr.in.sin_addr;
+      
       if (daemon->tftp_interfaces)
 	{
 	  /* dedicated tftp interface list */
@@ -308,7 +308,9 @@ void tftp_request(struct listener *listen, time_t now)
   /* May reuse struct transfer from abandoned transfer in single port mode. */
   if (!transfer && !(transfer = whine_malloc(sizeof(struct tftp_transfer))))
     return;
-  
+
+  memset(transfer, 0, sizeof(struct tftp_transfer));
+	 
   if (option_bool(OPT_SINGLE_PORT))
     transfer->sockfd = listen->tftpfd;
   else if ((transfer->sockfd = socket(family, SOCK_DGRAM, 0)) == -1)
@@ -320,15 +322,13 @@ void tftp_request(struct listener *listen, time_t now)
   transfer->peer = peer;
   transfer->source = addra;
   transfer->if_index = if_index;
-  transfer->timeout = now + 2;
+  transfer->timeout = 2;
+  transfer->start = now;
   transfer->backoff = 1;
   transfer->block = 1;
   transfer->blocksize = 512;
-  transfer->offset = 0;
-  transfer->file = NULL;
-  transfer->opt_blocksize = transfer->opt_transize = 0;
-  transfer->netascii = transfer->carrylf = 0;
- 
+  transfer->windowsize = 1;
+  
   (void)prettyprint_addr(&peer, daemon->addrbuff);
   
   /* if we have a nailed-down range, iterate until we find a free one. */
@@ -361,140 +361,167 @@ void tftp_request(struct listener *listen, time_t now)
   
   p = packet + 2;
   end = packet + len;
+
+  len = 0;
   
-  if (ntohs(*((unsigned short *)packet)) != OP_RRQ ||
-      !(filename = next(&p, end)) ||
-      !(mode = next(&p, end)) ||
-      (strcasecmp(mode, "octet") != 0 && strcasecmp(mode, "netascii") != 0))
+  if (ntohs(*((unsigned short *)packet)) == OP_WRQ)
+    len = tftp_err(ERR_ILL, packet, _("unsupported write request from %s"),daemon->addrbuff, NULL);
+  else if (ntohs(*((unsigned short *)packet)) == OP_RRQ)
     {
-      if (!filename)
+      if (!(filename = next(&p, end)))
 	len = tftp_err(ERR_ILL, packet, _("empty filename in request from %s"), daemon->addrbuff, NULL);
+      else if (!(mode = next(&p, end)) || (strcasecmp(mode, "octet") != 0 && strcasecmp(mode, "netascii") != 0))
+	len = tftp_err(ERR_ILL, packet, _("unsupported request from %s"),daemon->addrbuff, NULL);
       else
-	len = tftp_err(ERR_ILL, packet, _("unsupported %srequest from %s"),
-		       (ntohs(*((unsigned short *)packet)) == OP_WRQ) ? _("write ") : "", daemon->addrbuff);
-      is_err = 1;
-    }
-  else
-    {
-      if (strcasecmp(mode, "netascii") == 0)
-	transfer->netascii = 1;
-      
-      while ((opt = next(&p, end)))
 	{
-	  if (strcasecmp(opt, "blksize") == 0)
+	  char *opt, *arg;
+	  
+	  if (strcasecmp(mode, "netascii") == 0)
+	    transfer->netascii = 1;
+	  
+	  while ((opt = next(&p, end)) && (arg = next(&p, end)))
 	    {
-	      if ((opt = next(&p, end)) && !option_bool(OPT_TFTP_NOBLOCK))
+	      unsigned int val = atoi(arg);
+	      
+	      if (strcasecmp(opt, "blksize") == 0 && !option_bool(OPT_TFTP_NOBLOCK))
 		{
 		  /* 32 bytes for IP, UDP and TFTP headers, 52 bytes for IPv6 */
 		  int overhead = (family == AF_INET) ? 32 : 52;
-		  transfer->blocksize = atoi(opt);
-		  if (transfer->blocksize < 1)
-		    transfer->blocksize = 1;
-		  if (transfer->blocksize > (unsigned)daemon->packet_buff_sz - 4)
-		    transfer->blocksize = (unsigned)daemon->packet_buff_sz - 4;
-		  if (mtu != 0 && transfer->blocksize > (unsigned)mtu - overhead)
-		    transfer->blocksize = (unsigned)mtu - overhead;
+		  if (val < 1)
+		    val  = 1;
+		  if (val > (unsigned)daemon->packet_buff_sz - 4)
+		    val  = (unsigned)daemon->packet_buff_sz - 4;
+		  if (mtu != 0 && val > (unsigned)mtu - overhead)
+		    val  = (unsigned)mtu - overhead;
+		  transfer->blocksize = val;
 		  transfer->opt_blocksize = 1;
 		  transfer->block = 0;
 		}
-	    }
-	  else if (strcasecmp(opt, "tsize") == 0 && next(&p, end) && !transfer->netascii)
-	    {
-	      transfer->opt_transize = 1;
-	      transfer->block = 0;
-	    }
-	}
-
-      /* cope with backslashes from windows boxen. */
-      for (p = filename; *p; p++)
-	if (*p == '\\')
-	  *p = '/';
-	else if (option_bool(OPT_TFTP_LC))
-	  *p = tolower((unsigned char)*p);
-		
-      strcpy(daemon->namebuff, "/");
-      if (prefix)
-	{
-	  if (prefix[0] == '/')
-	    daemon->namebuff[0] = 0;
-	  strncat(daemon->namebuff, prefix, (MAXDNAME-1) - strlen(daemon->namebuff));
-	  if (prefix[strlen(prefix)-1] != '/')
-	    strncat(daemon->namebuff, "/", (MAXDNAME-1) - strlen(daemon->namebuff));
-
-	  if (option_bool(OPT_TFTP_APREF_IP))
-	    {
-	      size_t oldlen = strlen(daemon->namebuff);
-	      struct stat statbuf;
-	      
-	      strncat(daemon->namebuff, daemon->addrbuff, (MAXDNAME-1) - strlen(daemon->namebuff));
-	      strncat(daemon->namebuff, "/", (MAXDNAME-1) - strlen(daemon->namebuff));
-	      
-	      /* remove unique-directory if it doesn't exist */
-	      if (stat(daemon->namebuff, &statbuf) == -1 || !S_ISDIR(statbuf.st_mode))
-		daemon->namebuff[oldlen] = 0;
+	      else if (strcasecmp(opt, "tsize") == 0 && !transfer->netascii)
+		{
+		  transfer->opt_transize = 1;
+		  transfer->block = 0;
+		}
+	      else if (strcasecmp(opt, "timeout") == 0)
+		{
+		  if (val > 255)
+		    val = 255;
+		  transfer->timeout = val;
+		  transfer->opt_timeout = 1;
+		  transfer->block = 0;
+		}
+	      else if (strcasecmp(opt, "windowsize") == 0 && !transfer->netascii)
+		{
+		  /* windowsize option only supported for binary transfers. */
+		  if (val < 1)
+		    val = 1;
+		  if (val > TFTP_MAX_WINDOW)
+		    val = TFTP_MAX_WINDOW;
+		  transfer->windowsize = val;
+		  transfer->opt_windowsize = 1;
+		  transfer->block = 0;
+		}
 	    }
 	  
-	  if (option_bool(OPT_TFTP_APREF_MAC))
+	  /* cope with backslashes from windows boxen. */
+	  for (p = filename; *p; p++)
+	    if (*p == '\\')
+	      *p = '/';
+	    else if (option_bool(OPT_TFTP_LC))
+	      *p = tolower((unsigned char)*p);
+	  
+	  strcpy(daemon->namebuff, "/");
+	  if (prefix)
 	    {
-	      unsigned char *macaddr = NULL;
-	      unsigned char macbuf[DHCP_CHADDR_MAX];
+	      if (prefix[0] == '/')
+		daemon->namebuff[0] = 0;
+	      strncat(daemon->namebuff, prefix, (MAXDNAME-1) - strlen(daemon->namebuff));
+	      if (prefix[strlen(prefix)-1] != '/')
+		strncat(daemon->namebuff, "/", (MAXDNAME-1) - strlen(daemon->namebuff));
 	      
-#ifdef HAVE_DHCP
-	      if (daemon->dhcp && peer.sa.sa_family == AF_INET)
-	        {
-		  /* Check if the client IP is in our lease database */
-		  struct dhcp_lease *lease = lease_find_by_addr(peer.in.sin_addr);
-		  if (lease && lease->hwaddr_type == ARPHRD_ETHER && lease->hwaddr_len == ETHER_ADDR_LEN)
-		    macaddr = lease->hwaddr;
-		}
-#endif
-	      
-	      /* If no luck, try to find in ARP table. This only works if client is in same (V)LAN */
-	      if (!macaddr && find_mac(&peer, macbuf, 1, now) > 0)
-		macaddr = macbuf;
-	      
-	      if (macaddr)
-	        {
+	      if (option_bool(OPT_TFTP_APREF_IP))
+		{
 		  size_t oldlen = strlen(daemon->namebuff);
 		  struct stat statbuf;
-
-		  snprintf(daemon->namebuff + oldlen, (MAXDNAME-1) - oldlen, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x/",
-			   macaddr[0], macaddr[1], macaddr[2], macaddr[3], macaddr[4], macaddr[5]);
+		  
+		  strncat(daemon->namebuff, daemon->addrbuff, (MAXDNAME-1) - strlen(daemon->namebuff));
+		  strncat(daemon->namebuff, "/", (MAXDNAME-1) - strlen(daemon->namebuff));
 		  
 		  /* remove unique-directory if it doesn't exist */
 		  if (stat(daemon->namebuff, &statbuf) == -1 || !S_ISDIR(statbuf.st_mode))
 		    daemon->namebuff[oldlen] = 0;
 		}
+	      
+	      if (option_bool(OPT_TFTP_APREF_MAC))
+		{
+		  unsigned char *macaddr = NULL;
+		  unsigned char macbuf[DHCP_CHADDR_MAX];
+		  
+#ifdef HAVE_DHCP
+		  if (daemon->dhcp && peer.sa.sa_family == AF_INET)
+		    {
+		      /* Check if the client IP is in our lease database */
+		      struct dhcp_lease *lease = lease_find_by_addr(peer.in.sin_addr);
+		      if (lease && lease->hwaddr_type == ARPHRD_ETHER && lease->hwaddr_len == ETHER_ADDR_LEN)
+			macaddr = lease->hwaddr;
+		    }
+#endif
+		  
+		  /* If no luck, try to find in ARP table. This only works if client is in same (V)LAN */
+		  if (!macaddr && find_mac(&peer, macbuf, 1, now) > 0)
+		    macaddr = macbuf;
+		  
+		  if (macaddr)
+		    {
+		      size_t oldlen = strlen(daemon->namebuff);
+		      struct stat statbuf;
+		      
+		      snprintf(daemon->namebuff + oldlen, (MAXDNAME-1) - oldlen, "%.2x-%.2x-%.2x-%.2x-%.2x-%.2x/",
+			       macaddr[0], macaddr[1], macaddr[2], macaddr[3], macaddr[4], macaddr[5]);
+		      
+		      /* remove unique-directory if it doesn't exist */
+		      if (stat(daemon->namebuff, &statbuf) == -1 || !S_ISDIR(statbuf.st_mode))
+			daemon->namebuff[oldlen] = 0;
+		    }
+		}
+	      
+	      /* Absolute pathnames OK if they match prefix */
+	      if (filename[0] == '/')
+		{
+		  if (strstr(filename, daemon->namebuff) == filename)
+		    daemon->namebuff[0] = 0;
+		  else
+		    filename++;
+		}
 	    }
+	  else if (filename[0] == '/')
+	    daemon->namebuff[0] = 0;
+	  strncat(daemon->namebuff, filename, (MAXDNAME-1) - strlen(daemon->namebuff));
 	  
-	  /* Absolute pathnames OK if they match prefix */
-	  if (filename[0] == '/')
+	  /* check permissions and open file */
+	  if ((transfer->file = check_tftp_fileperm(&len, prefix, daemon->addrbuff)))
 	    {
-	      if (strstr(filename, daemon->namebuff) == filename)
-		daemon->namebuff[0] = 0;
+	      transfer->lastack = transfer->block;
+	      transfer->retransmit = now + transfer->timeout;
+	      /* This packet is may be the first data packet, but only if windowsize == 1
+		 To get windowsize greater then one requires an option negotiation,
+		 in which case this packet is the OACK. */
+	      if ((len = get_block(packet, transfer)) == -1)
+		len = tftp_err_oops(packet, daemon->namebuff);
 	      else
-		filename++;
+		is_err = 0;
 	    }
 	}
-      else if (filename[0] == '/')
-	daemon->namebuff[0] = 0;
-      strncat(daemon->namebuff, filename, (MAXDNAME-1) - strlen(daemon->namebuff));
-      
-      /* check permissions and open file */
-      if ((transfer->file = check_tftp_fileperm(&len, prefix, daemon->addrbuff)))
-	{
-	  if ((len = get_block(packet, transfer)) == -1)
-	    len = tftp_err_oops(packet, daemon->namebuff);
-	  else
-	    is_err = 0;
-	}
     }
-
-  send_from(transfer->sockfd, !option_bool(OPT_SINGLE_PORT), packet, len, &peer, &addra, if_index);
-
+  
+  if (len)
+    {
+      send_from(transfer->sockfd, !option_bool(OPT_SINGLE_PORT), packet, len, &peer, &addra, if_index);
+      
 #ifdef HAVE_DUMPFILE
-  dump_packet_udp(DUMP_TFTP, (void *)packet, len, NULL, (union mysockaddr *)&peer, transfer->sockfd);
+      dump_packet_udp(DUMP_TFTP, (void *)packet, len, NULL, (union mysockaddr *)&peer, transfer->sockfd);
 #endif
+    }
   
   if (is_err)
     free_transfer(transfer);
@@ -610,6 +637,10 @@ void check_tftp_listeners(time_t now)
 
 	  if ((len = recvfrom(transfer->sockfd, daemon->packet, daemon->packet_buff_sz, 0, &peer.sa, &addr_len)) > 0)
 	    {
+#ifdef HAVE_DUMPFILE
+	      dump_packet_udp(DUMP_TFTP, (void *)daemon->packet, len, (union mysockaddr *)&peer, NULL, transfer->sockfd);
+#endif	      
+
 	      if (sockaddr_isequal(&peer, &transfer->peer)) 
 		handle_tftp(now, transfer, len);
 	      else
@@ -628,66 +659,90 @@ void check_tftp_listeners(time_t now)
 	  
   for (transfer = daemon->tftp_trans, up = &daemon->tftp_trans; transfer; transfer = tmp)
     {
-      tmp = transfer->next;
+      int endcon = 0, error = 0, timeout = 0;
       
-      if (difftime(now, transfer->timeout) >= 0.0)
+      tmp = transfer->next;
+            
+      /* ->start set to zero in handle_tftp() when we recv an error packet. */
+      if (transfer->start == 0)
+	endcon = error = 1;
+      else if (difftime(now, transfer->start) > TFTP_TRANSFER_TIME)  
 	{
-	  int endcon = 0;
+	  endcon = 1;
+	  /* don't complain about timeout when we're awaiting the last
+	     ACK, some clients never send it */
+	  if (get_block(daemon->packet, transfer) > 0)
+	    error = timeout = 1;
+	}
+      else if (difftime(now, transfer->retransmit) >= 0.0)
+	{
+	  /* Do transmission or re-transmission. When we get an ACK, the call to handle_tftp()
+	     bumps transfer->lastack and trips the retransmit timer so that we send the next block(s)
+	     here. */
 	  ssize_t len;
-
-	  /* timeout, retransmit */
-	  transfer->timeout += 1 + (1<<(transfer->backoff/2));
-	  	  
-	  /* we overwrote the buffer... */
-	  daemon->srv_save = NULL;
-
-	  if ((len = get_block(daemon->packet, transfer)) == -1)
-	    {
-	      len = tftp_err_oops(daemon->packet, transfer->file->filename);
-	      endcon = 1;
-	    }
-	  else if (++transfer->backoff > 7)
-	    {
-	      /* don't complain about timeout when we're awaiting the last
-		 ACK, some clients never send it */
-	      if ((unsigned)len == transfer->blocksize + 4)
-		endcon = 1;
-	      len = 0;
-	    }
-
-	  if (len != 0)
-	    {
-	      send_from(transfer->sockfd, !option_bool(OPT_SINGLE_PORT), daemon->packet, len,
-			&transfer->peer, &transfer->source, transfer->if_index);
-#ifdef HAVE_DUMPFILE
-	      dump_packet_udp(DUMP_TFTP, (void *)daemon->packet, len, NULL, (union mysockaddr *)&transfer->peer, transfer->sockfd);
-#endif
-	    }
 	  
-	  if (endcon || len == 0)
+	  transfer->retransmit += transfer->timeout + (1<<(transfer->backoff/2));
+	  transfer->backoff++;
+	  transfer->block = transfer->lastack;
+	  
+	  if ((len = get_block(daemon->packet, transfer)) == 0)
+	    endcon = 1; /* got last ACK */
+	  else
 	    {
-	      strcpy(daemon->namebuff, transfer->file->filename);
-	      sanitise(daemon->namebuff);
-	      (void)prettyprint_addr(&transfer->peer, daemon->addrbuff);
-	      my_syslog(MS_TFTP | LOG_INFO, endcon ? _("failed sending %s to %s") : _("sent %s to %s"), daemon->namebuff, daemon->addrbuff);
-	      /* unlink */
-	      *up = tmp;
-	      if (endcon)
-		free_transfer(transfer);
-	      else
+	      /* send a window'a worth of blocks unless we're retransmitting OACK */
+	      unsigned int i, winsize = transfer->block ? transfer->windowsize : 1;
+	      
+	      for (i = 0; i < winsize && !endcon; i++, transfer->block++)
 		{
-		  /* put on queue to be sent to script and deleted */
-		  transfer->next = daemon->tftp_done_trans;
-		  daemon->tftp_done_trans = transfer;
+		  if (i != 0)
+		    len = get_block(daemon->packet, transfer);
+
+		  if (len == 0)
+		    break;
+		  
+		  if (len == -1)
+		    {
+		      len = tftp_err_oops(daemon->packet, transfer->file->filename);
+		      endcon = error = 1;
+		    }
+		  
+		  send_from(transfer->sockfd, !option_bool(OPT_SINGLE_PORT), daemon->packet, len,
+			    &transfer->peer, &transfer->source, transfer->if_index);
+#ifdef HAVE_DUMPFILE
+		  dump_packet_udp(DUMP_TFTP, (void *)daemon->packet, len, NULL, (union mysockaddr *)&transfer->peer, transfer->sockfd);
+#endif
 		}
-	      continue;
 	    }
 	}
-
-      up = &transfer->next;
-    }    
-}
+	      
+      if (endcon)
+	{
+	  strcpy(daemon->namebuff, transfer->file->filename);
+	  sanitise(daemon->namebuff);
+	  (void)prettyprint_addr(&transfer->peer, daemon->addrbuff);
+	  if (timeout)
+	    my_syslog(MS_TFTP | LOG_ERR, _("timeout sending %s to %s"), daemon->namebuff, daemon->addrbuff);
+	  else if (error)
+	    my_syslog(MS_TFTP | LOG_ERR, _("failed sending %s to %s"), daemon->namebuff, daemon->addrbuff);
+	  else
+	    my_syslog(MS_TFTP | LOG_INFO, _("sent %s to %s"), daemon->namebuff, daemon->addrbuff);
 	  
+	  /* unlink */
+	  *up = tmp;
+	  if (error)
+	    free_transfer(transfer);
+	  else
+	    {
+	      /* put on queue to be sent to script and deleted */
+	      transfer->next = daemon->tftp_done_trans;
+	      daemon->tftp_done_trans = transfer;
+	    }
+	}
+      else
+	up = &transfer->next;
+    }
+}
+
 /* packet in daemon->packet as this is called. */
 static void handle_tftp(time_t now, struct tftp_transfer *transfer, ssize_t len)
 {
@@ -697,13 +752,30 @@ static void handle_tftp(time_t now, struct tftp_transfer *transfer, ssize_t len)
   
   if (len >= (ssize_t)sizeof(struct ack))
     {
-      if (ntohs(mess->op) == OP_ACK && ntohs(mess->block) == (unsigned short)transfer->block) 
+      if (ntohs(mess->op) == OP_ACK)
 	{
-	  /* Got ack, ensure we take the (re)transmit path */
-	  transfer->timeout = now;
-	  transfer->backoff = 0;
-	  if (transfer->block++ != 0)
-	    transfer->offset += transfer->blocksize - transfer->expansion;
+	  /* try and handle 16-bit blockno wrap-around */
+	  unsigned int block = (unsigned short)ntohs(mess->block);
+	  if (block < transfer->lastack)
+	    block |= transfer->block & 0xffff0000;
+	  
+	  /* ignore duplicate ACKs and ACKs for blocks we've not yet sent. */
+	  if (block >= transfer->lastack &&
+	      block <= transfer->block) 
+	    {
+	      /* Got ack, move forward and ensure we take the (re)transmit path */
+	      transfer->retransmit = transfer->start = now;
+	      transfer->backoff = 0;
+	      transfer->lastack = block + 1;
+	      
+	      /* We have no easy function from block no. to file offset when
+		 expanding line breaks in netascii mode, so we update the offset here
+		 as each block is acknowledged. This explains why the window size must be
+		 one for a netascii transfer; to avoid  the block no. doing anything
+		 other than incrementing by one. */
+	      if (transfer->netascii && block != 0)
+		transfer->offset += transfer->blocksize - transfer->expansion;
+	    }
 	}
       else if (ntohs(mess->op) == OP_ERR)
 	{
@@ -724,8 +796,7 @@ static void handle_tftp(time_t now, struct tftp_transfer *transfer, ssize_t len)
 		    daemon->addrbuff);	
 	  
 	  /* Got err, ensure we take abort */
-	  transfer->timeout = now;
-	  transfer->backoff = 100;
+	  transfer->start = 0;
 	}
     }
 }
@@ -785,7 +856,10 @@ static ssize_t tftp_err(int err, char *packet, char *message, char *file, char *
     char message[];
   } *mess = (struct errmess *)packet;
   ssize_t len, ret = 4;
-    
+
+  /* we overwrote the buffer... */
+  daemon->srv_save = NULL;
+
   memset(packet, 0, daemon->packet_buff_sz);
   if (file)
     sanitise(file);
@@ -813,7 +887,10 @@ static ssize_t tftp_err_oops(char *packet, const char *file)
 static ssize_t get_block(char *packet, struct tftp_transfer *transfer)
 {
   memset(packet, 0, daemon->packet_buff_sz);
-  
+
+  /* we overwrote the buffer... */
+  daemon->srv_save = NULL;
+
   if (transfer->block == 0)
     {
       /* send OACK */
@@ -835,7 +912,17 @@ static ssize_t get_block(char *packet, struct tftp_transfer *transfer)
 	  p += (sprintf(p,"tsize") + 1);
 	  p += (sprintf(p, "%u", (unsigned int)transfer->file->size) + 1);
 	}
-
+      if (transfer->opt_timeout)
+	{
+	  p += (sprintf(p,"timeout") + 1);
+	  p += (sprintf(p, "%u", transfer->timeout) + 1);
+	}
+      if (transfer->opt_windowsize)
+	{
+	  p += (sprintf(p,"windowsize") + 1);
+	  p += (sprintf(p, "%u", (unsigned int)transfer->windowsize) + 1);
+	}
+ 
       return p - packet;
     }
   else
@@ -846,31 +933,35 @@ static ssize_t get_block(char *packet, struct tftp_transfer *transfer)
 	unsigned char data[];
       } *mess = (struct datamess *)packet;
       
-      size_t size = transfer->file->size - transfer->offset; 
+      size_t size;
+      
+      if (!transfer->netascii)
+	transfer->offset = (transfer->block - 1) * transfer->blocksize;
       
       if (transfer->offset > transfer->file->size)
 	return 0; /* finished */
       
-      if (size > transfer->blocksize)
+      if ((size = transfer->file->size - transfer->offset) > transfer->blocksize)
 	size = transfer->blocksize;
       
       mess->op = htons(OP_DATA);
       mess->block = htons((unsigned short)(transfer->block));
-      
-      if (lseek(transfer->file->fd, transfer->offset, SEEK_SET) == (off_t)-1 ||
-	  !read_write(transfer->file->fd, mess->data, size, RW_READ))
+
+      if (size != 0 &&
+	  (lseek(transfer->file->fd, transfer->offset, SEEK_SET) == (off_t)-1 ||
+	   !read_write(transfer->file->fd, mess->data, size, RW_READ)))
 	return -1;
       
-      transfer->expansion = 0;
-      
       /* Map '\n' to CR-LF in netascii mode */
       if (transfer->netascii)
 	{
 	  size_t i;
 	  int newcarrylf;
-
+	  
+	  transfer->expansion = 0;
+	  
 	  for (i = 0, newcarrylf = 0; i < size; i++)
-	    if (mess->data[i] == '\n' && ( i != 0 || !transfer->carrylf))
+	    if (mess->data[i] == '\n' && (i != 0 || !transfer->carrylf))
 	      {
 		transfer->expansion++;
 
@@ -885,8 +976,8 @@ static ssize_t get_block(char *packet, struct tftp_transfer *transfer)
 		
 		i++;
 	      }
+
 	  transfer->carrylf = newcarrylf;
-	  
 	}
 
       return size + 4;

src/ubus.c

@@ -213,6 +213,11 @@ static int ubus_handle_set_connmark_allowlist(struct ubus_context *ctx, struct u
   size_t num_patterns = 0;
   struct blob_attr *tb[policy_len];
   struct blob_attr *attr;
+
+  (void)ctx;
+  (void)obj;
+  (void)req;
+  (void)method;
   
   if (blobmsg_parse(policy, policy_len, tb, blob_data(msg), blob_len(msg)))
     return UBUS_STATUS_INVALID_ARGUMENT;

src/util.c

@@ -34,6 +34,10 @@
 #include <sys/utsname.h>
 #endif
 
+#ifdef HAVE_BSD_NETWORK
+#include <libgen.h>
+#endif
+
 /* SURF random number generator */
 
 static u32 seed[32];
@@ -831,9 +835,34 @@ void close_fds(long max_fd, int spare1, int spare2, int spare3)
 #endif
 
 #ifdef FDESCFS
-  DIR *d;
+  DIR *d = NULL;
   
-  if ((d = opendir(FDESCFS)))
+#  ifdef HAVE_BSD_NETWORK
+  dev_t dirdev = 0;
+  char fdescfs[] = FDESCFS; /* string must be writable */
+  struct stat statbuf;
+
+  /* On BSD, fdescfs is normally mounted at /dev/fd. However
+     if it is NOT mounted, devfs creates a directory at /dev/fd
+     which contains (only) the file descriptors 0,1 and 2.
+
+     Under these conditions, opendir() will succeed, and
+     if we proceed we will fail to close extant
+     file descriptors which should be closed.
+     
+     Check that there is a filesystem mounted at /dev/fd
+     by checking that the device changes between /dev/fd
+     and /dev. If if doesn't, fall back to the dumb path. */
+  
+  if (stat(fdescfs, &statbuf) != -1)
+    dirdev = statbuf.st_dev;
+
+  if (stat(dirname(fdescfs), &statbuf) != -1 &&
+      dirdev != statbuf.st_dev)
+#  endif
+    d = opendir(FDESCFS);
+      
+  if (d)
     {
       struct dirent *de;
 
@@ -855,9 +884,9 @@ void close_fds(long max_fd, int spare1, int spare2, int spare3)
       
       closedir(d);
       return;
-  }
+    }
 #endif
-
+  
   /* fallback, dumb code. */
   for (max_fd--; max_fd >= 0; max_fd--)
     if (max_fd != STDOUT_FILENO && max_fd != STDERR_FILENO && max_fd != STDIN_FILENO &&