Implement dynamic interface discovery on *BSD

FreeBSD complains otherwise.

CHANGELOG

@@ -1,3 +1,10 @@
+version 2.69
+	    Implement dynamic interface discovery on *BSD. This allows
+	    the contructor: syntax to be used in dhcp-range for DHCPv6
+	    on the BSD platform. Thanks to Matthias Andree for
+	    valuable research on how to implement this.
+
+
 version 2.68
             Use random addresses for DHCPv6 temporary address
             allocations, instead of algorithmically determined stable
@@ -32,7 +39,24 @@ version 2.68
 	    the prefix is deleted (rather than replaced), it doesn't
 	    get advertised with zero preferred time. Thanks to Tsachi
 	    for the bug report. 
- 
+
+	    Fix segfault with some locally configured CNAMEs. Thanks
+	    to Andrew Childs for spotting the problem.
+
+	    Fix memory leak on re-reading /etc/hosts and friends,
+	    introduced in 2.67.
+
+	    Check the arrival interface of incoming DNS and TFTP
+	    requests via IPv6, even in --bind-interfaces mode. This
+	    isn't possible for IPv4 and can generate scary warnings,
+	    but as it's always possible for IPv6 (the API always
+	    exists) then we should do it always. 
+	    
+	    Tweak the rules on prefix-lengths in --dhcp-range for
+	    IPv6. The new rule is that the specified prefix length
+	    must be larger than or equal to the prefix length of the
+	    corresponding address on the local interface. 
+
 
 version 2.67
 	    Fix crash if upstream server returns SERVFAIL when

debian/changelog

@@ -1,3 +1,9 @@
+dnsmasq (2.68-1) unstable; urgency=low
+
+   * New upstream. (closes: #730553)
+   
+ -- Simon Kelley <simon@thekelleys.org.uk>  Sun, 8 Dec 2013 15:57:32 +0000
+
 dnsmasq (2.67-1) unstable; urgency=low
 
    * New upstream.

man/dnsmasq.8

@@ -199,7 +199,12 @@ or
 .B --listen-address
 configuration, indeed
 .B --auth-server
-will overide these and provide a different DNS service on the specified interface. The <domain> is the "glue record". It should resolve in the global DNS to a A and/or AAAA record which points to the address dnsmasq is listening on.
+will overide these and provide a different DNS service on the
+specified interface. The <domain> is the "glue record". It should
+resolve in the global DNS to a A and/or AAAA record which points to
+the address dnsmasq is listening on. When an interface is specified,
+it may be qualified with "/4" or "/6" to specify only the IPv4 or IPv6
+addresses associated with the interface.
 .TP 
 .B \-2, --no-dhcp-interface=<interface name>
 Do not provide DHCP or TFTP on the specified interface, but do provide DNS service.
@@ -509,11 +514,13 @@ record (which is always in the C_IN class). The value of the record is
 given by the hex data, which may be of the form 01:23:45 or 01 23 45 or
 012345 or any mixture of these.
 .TP
-.B --interface-name=<name>,<interface>
+.B --interface-name=<name>,<interface>[/4|/6]
 Return a DNS record associating the name with the primary address on
-the given interface. This flag specifies an A record for the given
+the given interface. This flag specifies an A or AAAA record for the given
 name in the same way as an /etc/hosts line, except that the address is
-not constant, but taken from the given interface. If the interface is
+not constant, but taken from the given interface. The interface may be
+followed by "/4" or "/6" to specify that only IPv4 or IPv6 addresses
+of the interface should be used. If the interface is
 down, not configured or non-existent, an empty record is returned. The
 matching PTR record is also created, mapping the interface address to
 the name. More than one name may be associated with an interface
@@ -588,8 +595,10 @@ needed for a client to do validation itself.
 .TP
 .B --auth-zone=<domain>[,<subnet>[/<prefix length>][,<subnet>[/<prefix length>].....]]
 Define a DNS zone for which dnsmasq acts as authoritative server. Locally defined DNS records which are in the domain
-will be served. A and AAAA records must be in one of the
-specified subnets. As alternative to directly specifying the subnets, it's possible to
+will be served. If subnet(s) are given, A and AAAA records must be in one of the
+specified subnets.
+
+As alternative to directly specifying the subnets, it's possible to
 give the name of an interface, in which case the subnets implied by
 that interface's configured addresses and netmask/prefix-length are
 used; this is useful when using constructed DHCP ranges as the actual
@@ -606,7 +615,8 @@ ipv6.arpa domains which are served for reverse-DNS queries. If not
 specified, the prefix length defaults to 24 for IPv4 and 64 for IPv6.
 For IPv4 subnets, the prefix length should be have the value 8, 16 or 24
 unless you are familiar with RFC 2317 and have arranged the
-in-addr.arpa delegation accordingly. 
+in-addr.arpa delegation accordingly. Note that if no subnets are
+specified, then no reverse queries are answered.
 .TP
 .B --auth-soa=<serial>[,<hostmaster>[,<refresh>[,<retry>[,<expiry>]]]]
 Specify fields in the SOA record associated with authoritative
@@ -663,7 +673,8 @@ always optional. It is always
 allowed to have more than one dhcp-range in a single subnet. 
 
 For IPv6, the parameters are slightly different: instead of netmask
-and broadcast address, there is an optional prefix length. If not
+and broadcast address, there is an optional prefix length which must
+be equal to or larger then the prefix length on the local interface. If not
 given, this defaults to 64. Unlike the IPv4 case, the prefix length is not
 automatically derived from the interface configuration. The mimimum
 size of the prefix length is 64.

src/auth.c

@@ -18,7 +18,7 @@
 
 #ifdef HAVE_AUTH
 
-static struct addrlist *filter_zone(struct auth_zone *zone, int flag, struct all_addr *addr_u)
+static struct addrlist *find_subnet(struct auth_zone *zone, int flag, struct all_addr *addr_u)
 {
   struct addrlist *subnet;
 
@@ -45,6 +45,15 @@ static struct addrlist *filter_zone(struct auth_zone *zone, int flag, struct all
   return NULL;
 }
 
+static int filter_zone(struct auth_zone *zone, int flag, struct all_addr *addr_u)
+{
+  /* No zones specified, no filter */
+  if (!zone->subnet)
+    return 1;
+  
+  return find_subnet(zone, flag, addr_u) != NULL;
+}
+
 int in_zone(struct auth_zone *zone, char *name, char **cut)
 {
   size_t namelen = strlen(name);
@@ -130,7 +139,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	  if (!local_query)
 	    {
 	      for (zone = daemon->auth_zones; zone; zone = zone->next)
-		if ((subnet = filter_zone(zone, flag, &addr)))
+		if ((subnet = find_subnet(zone, flag, &addr)))
 		  break;
 	      
 	      if (!zone)
@@ -660,16 +669,16 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		  *cut = 0;
 		
 		for (addrlist = intr->addr; addrlist; addrlist = addrlist->next) 
-		  if (!(subnet->flags & ADDRLIST_IPV6) &&
-		      (local_query || filter_zone(zone, F_IPV4,  &addrlist->addr)) && 
+		  if (!(addrlist->flags & ADDRLIST_IPV6) &&
+		      (local_query || filter_zone(zone, F_IPV4, &addrlist->addr)) && 
 		      add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
 					  daemon->auth_ttl, NULL, T_A, C_IN, "4", cut ? intr->name : NULL, &addrlist->addr))
 		    anscount++;
 		
 #ifdef HAVE_IPV6
 		for (addrlist = intr->addr; addrlist; addrlist = addrlist->next) 
-		  if ((subnet->flags & ADDRLIST_IPV6) && 
-		      (local_query || filter_zone(zone, F_IPV6,  &addrlist->addr)) &&
+		  if ((addrlist->flags & ADDRLIST_IPV6) && 
+		      (local_query || filter_zone(zone, F_IPV6, &addrlist->addr)) &&
 		      add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
 					  daemon->auth_ttl, NULL, T_AAAA, C_IN, "6", cut ? intr->name : NULL, &addrlist->addr))
 		    anscount++;

src/bpf.c

@@ -19,9 +19,9 @@
 #if defined(HAVE_BSD_NETWORK) || defined(HAVE_SOLARIS_NETWORK)
 #include <ifaddrs.h>
 
-#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
 #include <sys/param.h>
 #include <sys/sysctl.h>
+#include <net/if.h>
 #include <net/route.h>
 #include <net/if_dl.h>
 #include <netinet/if_ether.h>
@@ -29,7 +29,9 @@
 #  include <net/if_var.h> 
 #endif
 #include <netinet/in_var.h>
-#include <netinet6/in6_var.h>
+#ifdef HAVE_IPV6
+#  include <netinet6/in6_var.h>
+#endif
 
 #ifndef SA_SIZE
 #define SA_SIZE(sa)                                             \
@@ -38,6 +40,13 @@
         1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) )
 #endif
 
+#ifdef HAVE_BSD_NETWORK
+static int del_family = 0;
+static struct all_addr del_addr;
+#endif
+
+#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
+
 int arp_enumerate(void *parm, int (*callback)())
 {
   int mib[6];
@@ -88,7 +97,7 @@ int arp_enumerate(void *parm, int (*callback)())
 
   return 1;
 }
-#endif
+#endif /* defined(HAVE_BSD_NETWORK) && !defined(__APPLE__) */
 
 
 int iface_enumerate(int family, void *parm, int (*callback)())
@@ -129,6 +138,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	    {
 	      struct in_addr addr, netmask, broadcast;
 	      addr = ((struct sockaddr_in *) addrs->ifa_addr)->sin_addr;
+#ifdef HAVE_BSD_NETWORK
+	      if (del_family == AF_INET && del_addr.addr.addr4.s_addr == addr.s_addr)
+		continue;
+#endif
 	      netmask = ((struct sockaddr_in *) addrs->ifa_netmask)->sin_addr;
 	      if (addrs->ifa_broadaddr)
 		broadcast = ((struct sockaddr_in *) addrs->ifa_broadaddr)->sin_addr; 
@@ -146,6 +159,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	      int i, j, prefix = 0;
 	      u32 valid = 0xffffffff, preferred = 0xffffffff;
 	      int flags = 0;
+#ifdef HAVE_BSD_NETWORK
+	      if (del_family == AF_INET6 && IN6_ARE_ADDR_EQUAL(&del_addr.addr.addr6, addr))
+		continue;
+#endif
 #if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
 	      struct in6_ifreq ifr6;
 
@@ -226,7 +243,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 
   return ret;
 }
-#endif
+#endif /* defined(HAVE_BSD_NETWORK) || defined(HAVE_SOLARIS_NETWORK) */
 
 
 #if defined(HAVE_BSD_NETWORK) && defined(HAVE_DHCP)
@@ -345,6 +362,87 @@ void send_via_bpf(struct dhcp_packet *mess, size_t len,
   while (writev(daemon->dhcp_raw_fd, iov, 4) == -1 && retry_send());
 }
 
+#endif /* defined(HAVE_BSD_NETWORK) && defined(HAVE_DHCP) */
+ 
+
+#ifdef HAVE_BSD_NETWORK
+
+void route_init(void)
+{
+  /* AF_UNSPEC: all addr families */
+  daemon->routefd = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC);
+  
+  if (daemon->routefd == -1 || !fix_fd(daemon->routefd))
+    die(_("cannot create PF_ROUTE socket: %s"), NULL, EC_BADNET);
+}
+
+void route_sock(time_t now)
+{
+  struct if_msghdr *msg;
+  int rc = recv(daemon->routefd, daemon->packet, daemon->packet_buff_sz, 0);
+
+  if (rc < 4)
+    return;
+
+  msg = (struct if_msghdr *)daemon->packet;
+  
+  if (rc < msg->ifm_msglen)
+    return;
+
+   if (msg->ifm_version != RTM_VERSION)
+     {
+       static int warned = 0;
+       if (!warned)
+	 {
+	   my_syslog(LOG_WARNING, _("Unknown protocol version from route socket"));
+	   warned = 1;
+	 }
+     }
+   else if (msg->ifm_type == RTM_NEWADDR)
+     {
+       del_family = 0;
+       newaddress(now);
+     }
+   else if (msg->ifm_type == RTM_DELADDR)
+     {
+       /* There's a race in the kernel, such that if we run iface_enumerate() immediately
+	  we get a DELADDR event, the deleted address still appears. Here we store the deleted address
+	  in a static variable, and omit it from the set returned by iface_enumerate() */
+       int mask = ((struct ifa_msghdr *)msg)->ifam_addrs;
+       int maskvec[] = { RTA_DST, RTA_GATEWAY, RTA_NETMASK, RTA_GENMASK,
+			 RTA_IFP, RTA_IFA, RTA_AUTHOR, RTA_BRD };
+       int of;
+       unsigned int i;
+       
+       for (i = 0,  of = sizeof(struct ifa_msghdr); of < rc && i < sizeof(maskvec)/sizeof(maskvec[0]); i++) 
+	 if (mask & maskvec[i]) 
+	   {
+	     struct sockaddr *sa = (struct sockaddr *)((char *)msg + of);
+	     size_t diff = (sa->sa_len != 0) ? sa->sa_len : sizeof(long);
+	     
+	     if (maskvec[i] == RTA_IFA)
+	       {
+		 del_family = sa->sa_family;
+		 if (del_family == AF_INET)
+		   del_addr.addr.addr4 = ((struct sockaddr_in *)sa)->sin_addr;
+#ifdef HAVE_IPV6
+		 else if (del_family == AF_INET6)
+		   del_addr.addr.addr6 = ((struct sockaddr_in6 *)sa)->sin6_addr;
 #endif
+		 else
+		   del_family = 0;
+	       }
+	     
+	     of += diff;
+	     /* round up as needed */
+	     if (diff & (sizeof(long) - 1)) 
+	       of += sizeof(long) - (diff & (sizeof(long) - 1));
+	   }
+       
+       newaddress(now);
+     }
+}
+
+#endif /* HAVE_BSD_NETWORK */
 
 

src/cache.c

@@ -320,7 +320,7 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
 	if (is_expired(now, crecp) || is_outdated_cname_pointer(crecp))
 	  { 
 	    *up = crecp->hash_next;
-	    if (!(crecp->flags & (F_HOSTS | F_DHCP)))
+	    if (!(crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG)))
 	      {
 		cache_unlink(crecp);
 		cache_free(crecp);
@@ -354,13 +354,13 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
 	  if (is_expired(now, crecp))
 	    {
 	      *up = crecp->hash_next;
-	      if (!(crecp->flags & (F_HOSTS | F_DHCP)))
+	      if (!(crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG)))
 		{ 
 		  cache_unlink(crecp);
 		  cache_free(crecp);
 		}
 	    }
-	  else if (!(crecp->flags & (F_HOSTS | F_DHCP)) &&
+	  else if (!(crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG)) &&
 		   (flags & crecp->flags & F_REVERSE) && 
 		   (flags & crecp->flags & (F_IPV4 | F_IPV6)) &&
 		   memcmp(&crecp->addr.addr, addr, addrlen) == 0)
@@ -558,7 +558,7 @@ struct crec *cache_find_by_name(struct crec *crecp, char *name, time_t now, unsi
 		  (crecp->flags & prot) &&
 		  hostname_isequal(cache_get_name(crecp), name))
 		{
-		  if (crecp->flags & (F_HOSTS | F_DHCP))
+		  if (crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG))
 		    {
 		      *chainp = crecp;
 		      chainp = &crecp->next;
@@ -599,7 +599,7 @@ struct crec *cache_find_by_name(struct crec *crecp, char *name, time_t now, unsi
 	    {
 	      /* expired entry, free it */
 	      *up = crecp->hash_next;
-	      if (!(crecp->flags & (F_HOSTS | F_DHCP)))
+	      if (!(crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG)))
 		{ 
 		  cache_unlink(crecp);
 		  cache_free(crecp);
@@ -649,7 +649,7 @@ struct crec *cache_find_by_addr(struct crec *crecp, struct all_addr *addr,
 	       if ((crecp->flags & prot) &&
 		   memcmp(&crecp->addr.addr, addr, addrlen) == 0)
 		 {	    
-		   if (crecp->flags & (F_HOSTS | F_DHCP))
+		   if (crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG))
 		     {
 		       *chainp = crecp;
 		       chainp = &crecp->next;
@@ -665,7 +665,7 @@ struct crec *cache_find_by_addr(struct crec *crecp, struct all_addr *addr,
 	   else
 	     {
 	       *up = crecp->hash_next;
-	       if (!(crecp->flags & (F_HOSTS | F_DHCP)))
+	       if (!(crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG)))
 		 {
 		   cache_unlink(crecp);
 		   cache_free(crecp);
@@ -923,7 +923,7 @@ void cache_reload(void)
     for (cache = hash_table[i], up = &hash_table[i]; cache; cache = tmp)
       {
 	tmp = cache->hash_next;
-	if (cache->flags & F_HOSTS)
+	if (cache->flags & (F_HOSTS | F_CONFIG))
 	  {
 	    *up = cache->hash_next;
 	    free(cache);
@@ -945,15 +945,15 @@ void cache_reload(void)
   /* Add CNAMEs to interface_names to the cache */
   for (a = daemon->cnames; a; a = a->next)
     for (intr = daemon->int_names; intr; intr = intr->next)
-      if (hostname_isequal(a->target, intr->name))
+      if (hostname_isequal(a->target, intr->name) &&
+	  ((cache = whine_malloc(sizeof(struct crec)))))
 	{
-	  struct crec *aliasc = safe_malloc(sizeof(struct crec));
-	  aliasc->flags = F_FORWARD | F_NAMEP | F_CNAME | F_IMMORTAL | F_CONFIG;
-	  aliasc->name.namep = a->alias;
-	  aliasc->addr.cname.target.int_name = intr;
-	  aliasc->addr.cname.uid = -1;
-	  cache_hash(aliasc);
-	  add_hosts_cname(aliasc); /* handle chains */
+	  cache->flags = F_FORWARD | F_NAMEP | F_CNAME | F_IMMORTAL | F_CONFIG;
+	  cache->name.namep = a->alias;
+	  cache->addr.cname.target.int_name = intr;
+	  cache->addr.cname.uid = -1;
+	  cache_hash(cache);
+	  add_hosts_cname(cache); /* handle chains */
 	}
   
   /* borrow the packet buffer for a temporary by-address hash */
@@ -1083,7 +1083,7 @@ void cache_add_dhcp_entry(char *host_name, int prot,
   while ((crec = cache_find_by_name(crec, host_name, 0, flags | F_CNAME)))
     {
       /* check all addresses associated with name */
-      if (crec->flags & F_HOSTS)
+      if (crec->flags & (F_HOSTS | F_CONFIG))
 	{
 	  if (crec->flags & F_CNAME)
 	    my_syslog(MS_DHCP | LOG_WARNING, 

src/config.h

@@ -189,10 +189,6 @@ HAVE_SOLARIS_NETWORK
 HAVE_GETOPT_LONG
    defined when GNU-style getopt_long available. 
 
-HAVE_ARC4RANDOM
-   defined if arc4random() available to get better security from DNS spoofs
-   by using really random ids (OpenBSD) 
-
 HAVE_SOCKADDR_SA_LEN
    defined if struct sockaddr has sa_len field (*BSD) 
 */
@@ -201,7 +197,6 @@ HAVE_SOCKADDR_SA_LEN
 #if defined(__uClinux__)
 #define HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 /* Never use fork() on uClinux. Note that this is subtly different from the
    --keep-in-foreground option, since it also  suppresses forking new 
@@ -215,7 +210,6 @@ HAVE_SOCKADDR_SA_LEN
    ((__UCLIBC_MAJOR__==0) && (__UCLIBC_MINOR__==9) && (__UCLIBC_SUBLEVEL__<21))
 #    define HAVE_GETOPT_LONG
 #endif
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 #if !defined(__ARCH_HAS_MMU__) && !defined(__UCLIBC_HAS_MMU__)
 #  define NO_FORK
@@ -230,7 +224,6 @@ HAVE_SOCKADDR_SA_LEN
 #elif defined(__linux__)
 #define HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 
 #elif defined(__FreeBSD__) || \
@@ -242,15 +235,11 @@ HAVE_SOCKADDR_SA_LEN
 #if defined(optional_argument) && defined(required_argument)
 #   define HAVE_GETOPT_LONG
 #endif
-#if !defined(__FreeBSD_kernel__)
-#   define HAVE_ARC4RANDOM
-#endif
 #define HAVE_SOCKADDR_SA_LEN
 
 #elif defined(__APPLE__)
 #define HAVE_BSD_NETWORK
 #define HAVE_GETOPT_LONG
-#define HAVE_ARC4RANDOM
 #define HAVE_SOCKADDR_SA_LEN
 /* Define before sys/socket.h is included so we get socklen_t */
 #define _BSD_SOCKLEN_T_
@@ -261,13 +250,11 @@ HAVE_SOCKADDR_SA_LEN
 #elif defined(__NetBSD__)
 #define HAVE_BSD_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #define HAVE_SOCKADDR_SA_LEN
 
 #elif defined(__sun) || defined(__sun__)
 #define HAVE_SOLARIS_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 #define ETHER_ADDR_LEN 6 
  

src/dhcp6.c

@@ -330,9 +330,9 @@ static int complete_context6(struct in6_addr *local,  int prefix,
 	    {
 	      if ((context->flags & CONTEXT_DHCP) &&
 		  !(context->flags & (CONTEXT_TEMPLATE | CONTEXT_OLD)) &&
-		  prefix == context->prefix &&
-		  is_same_net6(local, &context->start6, prefix) &&
-		  is_same_net6(local, &context->end6, prefix))
+		  prefix <= context->prefix &&
+		  is_same_net6(local, &context->start6, context->prefix) &&
+		  is_same_net6(local, &context->end6, context->prefix))
 		{
 		  
 		  
@@ -631,9 +631,9 @@ static int construct_worker(struct in6_addr *local, int prefix,
     if (!(template->flags & CONTEXT_TEMPLATE))
       {
 	/* non-template entries, just fill in interface and local addresses */
-	if (prefix == template->prefix &&
-	    is_same_net6(local, &template->start6, prefix) &&
-	    is_same_net6(local, &template->end6, prefix))
+	if (prefix <= template->prefix &&
+	    is_same_net6(local, &template->start6, template->prefix) &&
+	    is_same_net6(local, &template->end6, template->prefix))
 	  {
 	    template->if_index = if_index;
 	    template->local6 = *local;
@@ -641,7 +641,7 @@ static int construct_worker(struct in6_addr *local, int prefix,
 	
       }
     else if (wildcard_match(template->template_interface, ifrn_name) &&
-	     template->prefix == prefix)
+	     template->prefix >= prefix)
       {
 	start6 = *local;
 	setaddr6part(&start6, addr6part(&template->start6));
@@ -661,6 +661,7 @@ static int construct_worker(struct in6_addr *local, int prefix,
 		  log_context(AF_INET6, context); 
 		  /* fast RAs for a while */
 		  ra_start_unsolicted(param->now, context);
+		  param->newone = 1; 
 		  /* Add address to name again */
 		  if (context->flags & CONTEXT_RA_NAME)
 		    param->newname = 1;
@@ -719,7 +720,6 @@ void dhcp_construct_contexts(time_t now)
      
       if (context->flags & CONTEXT_GC && !(context->flags & CONTEXT_OLD))
 	{
-	  
 	  if ((context->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS)) ||
 	      option_bool(OPT_RA))
 	    {

src/dnsmasq.c

@@ -182,7 +182,7 @@ int main (int argc, char **argv)
 	    daemon->doing_dhcp6 = 1;
 	  if (context->flags & CONTEXT_RA)
 	    daemon->doing_ra = 1;
-#ifndef  HAVE_LINUX_NETWORK
+#if !defined(HAVE_LINUX_NETWORK) && !defined(HAVE_BSD_NETWORK)
 	  if (context->flags & CONTEXT_TEMPLATE)
 	    die (_("dhcp-range constructor not available on this platform"), NULL, EC_BADCONF);
 #endif 
@@ -220,13 +220,15 @@ int main (int argc, char **argv)
     ipset_init();
 #endif
 
-#ifdef HAVE_LINUX_NETWORK
+#if  defined(HAVE_LINUX_NETWORK)
   netlink_init();
-  
-  if (option_bool(OPT_NOWILD) && option_bool(OPT_CLEVERBIND))
-    die(_("cannot set --bind-interfaces and --bind-dynamic"), NULL, EC_BADCONF);
+#elif defined(HAVE_BSD_NETWORK)
+  route_init();
 #endif
 
+  if (option_bool(OPT_NOWILD) && option_bool(OPT_CLEVERBIND))
+    die(_("cannot set --bind-interfaces and --bind-dynamic"), NULL, EC_BADCONF);
+  
   if (!enumerate_interfaces(1) || !enumerate_interfaces(0))
     die(_("failed to find list of interfaces: %s"), NULL, EC_MISC);
   
@@ -636,7 +638,10 @@ int main (int argc, char **argv)
   if (bind_fallback)
     my_syslog(LOG_WARNING, _("setting --bind-interfaces option because of OS limitations"));
 
-  warn_bound_listeners();
+  if (option_bool(OPT_NOWILD))
+    warn_bound_listeners();
+
+  warn_int_names();
   
   if (!option_bool(OPT_NOWILD)) 
     for (if_tmp = daemon->if_names; if_tmp; if_tmp = if_tmp->next)
@@ -805,11 +810,14 @@ int main (int argc, char **argv)
 	}
 #endif
 
-#ifdef HAVE_LINUX_NETWORK
+#if defined(HAVE_LINUX_NETWORK)
       FD_SET(daemon->netlinkfd, &rset);
       bump_maxfd(daemon->netlinkfd, &maxfd);
+#elif defined(HAVE_BSD_NETWORK)
+      FD_SET(daemon->routefd, &rset);
+      bump_maxfd(daemon->routefd, &maxfd);
 #endif
-      
+
       FD_SET(piperead, &rset);
       bump_maxfd(piperead, &maxfd);
 
@@ -864,9 +872,12 @@ int main (int argc, char **argv)
 	  warn_bound_listeners();
 	}
 
-#ifdef HAVE_LINUX_NETWORK
+#if defined(HAVE_LINUX_NETWORK)
       if (FD_ISSET(daemon->netlinkfd, &rset))
 	netlink_multicast(now);
+#elif defined(HAVE_BSD_NETWORK)
+      if (FD_ISSET(daemon->routefd, &rset))
+	route_sock(now);
 #endif
 
       /* Check for changes to resolv files once per second max. */

src/dnsmasq.h

@@ -321,6 +321,7 @@ struct host_record {
 struct interface_name {
   char *name; /* domain name */
   char *intr; /* interface name */
+  int family; /* AF_INET, AF_INET6 or zero for both */
   struct addrlist *addr;
   struct interface_name *next;
 };
@@ -458,7 +459,7 @@ struct ipsets {
 struct irec {
   union mysockaddr addr;
   struct in_addr netmask; /* only valid for IPv4 */
-  int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done;
+  int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found;
   char *name; 
   struct irec *next;
 };
@@ -899,7 +900,7 @@ extern struct daemon {
 #if defined(HAVE_LINUX_NETWORK)
   int netlinkfd;
 #elif defined(HAVE_BSD_NETWORK)
-  int dhcp_raw_fd, dhcp_icmp_fd;
+  int dhcp_raw_fd, dhcp_icmp_fd, routefd;
 #endif
   struct iovec dhcp_packet;
   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
@@ -1076,6 +1077,7 @@ int enumerate_interfaces(int reset);
 void create_wildcard_listeners(void);
 void create_bound_listeners(int die);
 void warn_bound_listeners(void);
+void warn_int_names(void);
 int is_dad_listeners(void);
 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
@@ -1088,6 +1090,10 @@ int set_ipv6pktinfo(int fd);
 #ifdef HAVE_DHCP6
 void join_multicast(int dienow);
 #endif
+#if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
+void newaddress(time_t now);
+#endif
+
 
 /* dhcp.c */
 #ifdef HAVE_DHCP
@@ -1175,6 +1181,8 @@ void netlink_multicast(time_t now);
 void init_bpf(void);
 void send_via_bpf(struct dhcp_packet *mess, size_t len,
 		  struct in_addr iface_addr, struct ifreq *ifr);
+void route_init(void);
+void route_sock(time_t now);
 #endif
 
 /* bpf.c or netlink.c */

src/forward.c

@@ -675,8 +675,10 @@ void receive_query(struct listener *listen, time_t now)
   struct in_addr netmask, dst_addr_4;
   size_t m;
   ssize_t n;
-  int if_index = 0;
-  int local_auth = 0, auth_dns = 0;
+  int if_index = 0, auth_dns = 0;
+#ifdef HAVE_AUTH
+  int local_auth = 0;
+#endif
   struct iovec iov[1];
   struct msghdr msg;
   struct cmsghdr *cmptr;
@@ -695,7 +697,13 @@ void receive_query(struct listener *listen, time_t now)
 		 CMSG_SPACE(sizeof(struct sockaddr_dl))];
 #endif
   } control_u;
-  
+#ifdef HAVE_IPV6
+   /* Can always get recvd interface for IPv6 */
+  int check_dst = !option_bool(OPT_NOWILD) || listen->family == AF_INET6;
+#else
+  int check_dst = !option_bool(OPT_NOWILD);
+#endif
+
   /* packet buffer overwritten */
   daemon->srv_save = NULL;
   
@@ -738,7 +746,7 @@ void receive_query(struct listener *listen, time_t now)
     source_addr.in6.sin6_flowinfo = 0;
 #endif
 
-  if (!option_bool(OPT_NOWILD))
+  if (check_dst)
     {
       struct ifreq ifr;
 
@@ -916,7 +924,9 @@ unsigned char *tcp_request(int confd, time_t now,
 {
   size_t size = 0;
   int norebind = 0;
+#ifdef HAVE_AUTH
   int local_auth = 0;
+#endif
   int checking_disabled, check_subnet;
   size_t m;
   unsigned short qtype;

src/netlink.c

@@ -39,7 +39,6 @@ static struct iovec iov;
 static u32 netlink_pid;
 
 static int nl_async(struct nlmsghdr *h);
-static void nl_newaddress(time_t now);
 
 void netlink_init(void)
 {
@@ -203,7 +202,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	    /* handle async new interface address arrivals, these have to be done
 	       after we complete as we're not re-entrant */
 	    if (newaddr) 
-	      nl_newaddress(dnsmasq_time());
+	      newaddress(dnsmasq_time());
 		
 	    return callback_ok;
 	  }
@@ -351,7 +350,7 @@ void netlink_multicast(time_t now)
   fcntl(daemon->netlinkfd, F_SETFL, flags);
   
   if (newaddr) 
-    nl_newaddress(now);
+    newaddress(now);
 }
 
 static int nl_async(struct nlmsghdr *h)
@@ -399,30 +398,6 @@ static int nl_async(struct nlmsghdr *h)
   
   return 0;
 }
-  	
-static void nl_newaddress(time_t now)
-{
-  (void)now;
-
-  if (option_bool(OPT_CLEVERBIND) || daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
-    enumerate_interfaces(0);
-  
-  if (option_bool(OPT_CLEVERBIND))
-    create_bound_listeners(0);
-  
-#ifdef HAVE_DHCP6
-  if (daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
-    join_multicast(0);
-  
-  if (daemon->doing_dhcp6 || daemon->doing_ra)
-    dhcp_construct_contexts(now);
-  
-  if (daemon->doing_dhcp6)
-    lease_find_interfaces(now);
-#endif
-}
-
-
 #endif
 
       

src/network.c

@@ -159,7 +159,8 @@ int iface_check(int family, struct all_addr *addr, char *name, int *auth)
   for (tmp = daemon->authinterface; tmp; tmp = tmp->next)
     if (tmp->name)
       {
-	if (strcmp(tmp->name, name) == 0)
+	if (strcmp(tmp->name, name) == 0 &&
+	    (tmp->addr.sa.sa_family == 0 || tmp->addr.sa.sa_family == family))
 	  break;
       }
     else if (addr && tmp->addr.sa.sa_family == AF_INET && family == AF_INET &&
@@ -251,6 +252,8 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
   struct iname *tmp;
 #endif
 
+  (void)prefixlen;
+
   if (!indextoname(param->fd, if_index, ifr.ifr_name) ||
       ioctl(param->fd, SIOCGIFFLAGS, &ifr) == -1)
     return 0;
@@ -317,7 +320,8 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
 		    {
 		      al->next = zone->subnet;
 		      zone->subnet = al;
-		      al->prefixlen = prefixlen;al->addr.addr.addr6 = addr->in6.sin6_addr;
+		      al->prefixlen = prefixlen;
+		      al->addr.addr.addr6 = addr->in6.sin6_addr;
 		      al->flags = ADDRLIST_IPV6;
 		    }
 		} 
@@ -329,7 +333,8 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
       /* Update addresses from interface_names. These are a set independent
 	 of the set we're listening on. */  
       for (int_name = daemon->int_names; int_name; int_name = int_name->next)
-	if (strncmp(label, int_name->intr, IF_NAMESIZE) == 0)
+	if (strncmp(label, int_name->intr, IF_NAMESIZE) == 0 && 
+	    (addr->sa.sa_family == int_name->family || int_name->family == 0))
 	  {
 	    if (param->spare)
 	      {
@@ -366,6 +371,7 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
     if (sockaddr_isequal(&iface->addr, addr))
       {
 	iface->dad = dad;
+	iface->found = 1; /* for garbage collection */
 	return 1;
       }
 
@@ -440,6 +446,7 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
       iface->dns_auth = auth_dns;
       iface->mtu = mtu;
       iface->dad = dad;
+      iface->found = 1;
       iface->done = iface->multicast_done = iface->warned = 0;
       iface->index = if_index;
       if ((iface->name = whine_malloc(strlen(ifr.ifr_name)+1)))
@@ -477,7 +484,11 @@ static int iface_allowed_v6(struct in6_addr *local, int prefix,
   addr.in6.sin6_family = AF_INET6;
   addr.in6.sin6_addr = *local;
   addr.in6.sin6_port = htons(daemon->port);
-  addr.in6.sin6_scope_id = if_index;
+  /* FreeBSD insists this is zero for non-linklocal addresses */
+  if (IN6_IS_ADDR_LINKLOCAL(local))
+    addr.in6.sin6_scope_id = if_index;
+  else
+    addr.in6.sin6_scope_id = 0;
   
   return iface_allowed((struct iface_param *)vparam, if_index, NULL, &addr, netmask, prefix, !!(flags & IFACE_TENTATIVE));
 }
@@ -512,6 +523,7 @@ int enumerate_interfaces(int reset)
   int errsave, ret = 1;
   struct addrlist *addr, *tmp;
   struct interface_name *intname;
+  struct irec *iface;
 #ifdef HAVE_AUTH
   struct auth_zone *zone;
 #endif
@@ -536,6 +548,10 @@ int enumerate_interfaces(int reset)
   if ((param.fd = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
     return 0;
  
+  /* Mark interfaces for garbage collection */
+  for (iface = daemon->interfaces; iface; iface = iface->next) 
+    iface->found = 0;
+
   /* remove addresses stored against interface_names */
   for (intname = daemon->int_names; intname; intname = intname->next)
     {
@@ -582,11 +598,47 @@ int enumerate_interfaces(int reset)
  
   errsave = errno;
   close(param.fd);
+  
+  if (option_bool(OPT_CLEVERBIND))
+    { 
+      /* Garbage-collect listeners listening on addresses that no longer exist.
+	 Does nothing when not binding interfaces or for listeners on localhost, 
+	 since the ->iface field is NULL. Note that this needs the protections
+	 against re-entrancy, hence it's here.  It also means there's a possibility,
+	 in OPT_CLEVERBIND mode, that at listener will just disappear after
+	 a call to enumerate_interfaces, this is checked OK on all calls. */
+      struct listener *l, *tmp, **up;
+      
+      for (up = &daemon->listeners, l = daemon->listeners; l; l = tmp)
+	{
+	  tmp = l->next;
+	  
+	  if (!l->iface || l->iface->found)
+	    up = &l->next;
+	  else
+	    {
+	      *up = l->next;
+	      
+	      /* In case it ever returns */
+	      l->iface->done = 0;
+	      
+	      if (l->fd != -1)
+		close(l->fd);
+	      if (l->tcpfd != -1)
+		close(l->tcpfd);
+	      if (l->tftpfd != -1)
+		close(l->tftpfd);
+	      
+	      free(l);
+	    }
+	}
+    }
+  
   errno = errsave;
-
+  
   spare = param.spare;
   active = 0;
-
+  
   return ret;
 }
 
@@ -609,7 +661,7 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
   
   if ((fd = socket(family, type, 0)) == -1)
     {
-      int port;
+      int port, errsav;
       char *s;
 
       /* No error if the kernel just doesn't support this IP flavour */
@@ -619,6 +671,7 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
 	return -1;
       
     err:
+      errsav = errno;
       port = prettyprint_addr(addr, daemon->addrbuff);
       if (!option_bool(OPT_NOWILD) && !option_bool(OPT_CLEVERBIND))
 	sprintf(daemon->addrbuff, "port %d", port);
@@ -626,7 +679,9 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
       
       if (fd != -1)
 	close (fd);
-      
+	
+      errno = errsav;
+
       if (dienow)
 	{
 	  /* failure to bind addresses given by --listen-address at this point
@@ -656,9 +711,9 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
       if (listen(fd, 5) == -1)
 	goto err;
     }
-  else if (!option_bool(OPT_NOWILD))
+  else if (family == AF_INET)
     {
-      if (family == AF_INET)
+      if (!option_bool(OPT_NOWILD))
 	{
 #if defined(HAVE_LINUX_NETWORK) 
 	  if (setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &opt, sizeof(opt)) == -1)
@@ -669,11 +724,11 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
 	    goto err;
 #endif
 	}
-#ifdef HAVE_IPV6
-      else if (!set_ipv6pktinfo(fd))
-	goto err;
-#endif
     }
+#ifdef HAVE_IPV6
+  else if (!set_ipv6pktinfo(fd))
+    goto err;
+#endif
   
   return fd;
 }
@@ -821,7 +876,8 @@ static struct listener *create_listeners(union mysockaddr *addr, int do_tftp, in
       l->family = addr->sa.sa_family;
       l->fd = fd;
       l->tcpfd = tcpfd;
-      l->tftpfd = tftpfd;
+      l->tftpfd = tftpfd;	
+      l->iface = NULL;
     }
 
   return l;
@@ -868,7 +924,7 @@ void create_bound_listeners(int dienow)
   struct iname *if_tmp;
 
   for (iface = daemon->interfaces; iface; iface = iface->next)
-    if (!iface->done && !iface->dad && 
+    if (!iface->done && !iface->dad && iface->found &&
 	(new = create_listeners(&iface->addr, iface->tftp_ok, dienow)))
       {
 	new->iface = iface;
@@ -892,7 +948,6 @@ void create_bound_listeners(int dienow)
     if (!if_tmp->used && 
 	(new = create_listeners(&if_tmp->addr, !!option_bool(OPT_TFTP), dienow)))
       {
-	new->iface = NULL;
 	new->next = daemon->listeners;
 	daemon->listeners = new;
       }
@@ -906,6 +961,9 @@ void create_bound_listeners(int dienow)
 
    The fix is to use --bind-dynamic, which actually checks the arrival interface too.
    Tough if your platform doesn't support this.
+
+   Note that checking the arrival interface is supported in the standard IPv6 API and
+   always done, so we don't warn about any IPv6 addresses here.
 */
 
 void warn_bound_listeners(void)
@@ -914,43 +972,34 @@ void warn_bound_listeners(void)
   int advice = 0;
 
   for (iface = daemon->interfaces; iface; iface = iface->next)
-    if (option_bool(OPT_NOWILD) && !iface->dns_auth)
+    if (!iface->dns_auth)
       {
-	int warn = 0;
 	if (iface->addr.sa.sa_family == AF_INET)
 	  {
 	    if (!private_net(iface->addr.in.sin_addr, 1))
 	      {
 		inet_ntop(AF_INET, &iface->addr.in.sin_addr, daemon->addrbuff, ADDRSTRLEN);
-		warn = 1;
+		iface->warned = advice = 1;
+		my_syslog(LOG_WARNING, 
+			  _("LOUD WARNING: listening on %s may accept requests via interfaces other than %s"),
+			  daemon->addrbuff, iface->name);
 	      }
 	  }
-#ifdef HAVE_IPV6
-	else
-	  {
-	    if (!IN6_IS_ADDR_LINKLOCAL(&iface->addr.in6.sin6_addr) &&
-		!IN6_IS_ADDR_SITELOCAL(&iface->addr.in6.sin6_addr) &&
-		!IN6_IS_ADDR_ULA(&iface->addr.in6.sin6_addr) &&
-		!IN6_IS_ADDR_LOOPBACK(&iface->addr.in6.sin6_addr))
-	      {
-		inet_ntop(AF_INET6, &iface->addr.in6.sin6_addr, daemon->addrbuff, ADDRSTRLEN);
-		warn = 1;
-	      }
-	  }
-#endif
-	if (warn)
-	  {
-	    iface->warned = advice = 1;
-	    my_syslog(LOG_WARNING, 
-		      _("LOUD WARNING: listening on %s may accept requests via interfaces other than %s. "),
-		      daemon->addrbuff, iface->name);
-	  }
       }
   
   if (advice)
-    my_syslog(LOG_WARNING, _("LOUD WARNING: use --bind-dynamic rather than --bind-interfaces to avoid DNS amplification attacks via these interface(s).")); 
+    my_syslog(LOG_WARNING, _("LOUD WARNING: use --bind-dynamic rather than --bind-interfaces to avoid DNS amplification attacks via these interface(s)")); 
 }
 
+void warn_int_names(void)
+{
+  struct interface_name *intname;
+ 
+  for (intname = daemon->int_names; intname; intname = intname->next)
+    if (!intname->addr)
+      my_syslog(LOG_WARNING, _("warning: no addresses found for interface %s"), intname->intr);
+}
+ 
 int is_dad_listeners(void)
 {
   struct irec *iface;
@@ -1421,7 +1470,31 @@ int reload_servers(char *fname)
   return gotone;
 }
 
+#if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
+/* Called when addresses are added or deleted from an interface */
+void newaddress(time_t now)
+{
+  (void)now;
+  
+  if (option_bool(OPT_CLEVERBIND) || daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
+    enumerate_interfaces(0);
+  
+  if (option_bool(OPT_CLEVERBIND))
+    create_bound_listeners(0);
+  
+#ifdef HAVE_DHCP6
+  if (daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
+    join_multicast(0);
+  
+  if (daemon->doing_dhcp6 || daemon->doing_ra)
+    dhcp_construct_contexts(now);
+  
+  if (daemon->doing_dhcp6)
+    lease_find_interfaces(now);
+#endif
+}
 
+#endif
 
 
 

src/option.c

@@ -1615,8 +1615,22 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	  new->addr.sa.sa_family = AF_INET6;
 #endif
 	else
-	  new->name = opt_string_alloc(arg);
-	
+	  {
+	    char *fam = split_chr(arg, '/');
+	    new->name = opt_string_alloc(arg);
+	    new->addr.sa.sa_family = 0;
+	    if (fam)
+	      {
+		if (strcmp(fam, "4") == 0)
+		  new->addr.sa.sa_family = AF_INET;
+#ifdef HAVE_IPV6
+		else if (strcmp(fam, "6") == 0)
+		  new->addr.sa.sa_family = AF_INET6;
+#endif
+		else
+		  ret_err(gen_err);
+	      } 
+	  }
 	new->next = daemon->authinterface;
 	daemon->authinterface = new;
 	
@@ -3362,6 +3376,19 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	for (up = &daemon->int_names; *up; up = &((*up)->next));
 	*up = new;
 	new->name = domain;
+	new->family = 0;
+	arg = split_chr(comma, '/');
+	if (arg)
+	  {
+	    if (strcmp(arg, "4") == 0)
+	      new->family = AF_INET;
+#ifdef HAVE_IPV6
+	    else if (strcmp(arg, "6") == 0)
+	      new->family = AF_INET6;
+#endif
+	    else
+	      ret_err(gen_err);
+	  } 
 	new->intr = opt_string_alloc(comma);
 	break;
       }
@@ -3455,7 +3482,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
     case LOPT_RR: /* dns-rr */
       {
        	struct txt_record *new;
-	size_t len;
+	size_t len = len;
 	char *data;
 	int val;
 

src/radv.c

@@ -205,7 +205,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
   struct dhcp_netid iface_id;
   struct dhcp_opt *opt_cfg;
   struct ra_interface *ra_param = find_iface_param(iface_name);
-  int done_dns = 0;
+  int done_dns = 0, old_prefix = 0;
 #ifdef HAVE_LINUX_NETWORK
   FILE *f;
 #endif
@@ -267,7 +267,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 	      struct in6_addr local = context->start6;
 	      int do_slaac = 0;
 
-	      parm.found_context = 1;
+	      old_prefix = 1;
 
 	      /* zero net part of address */
 	      setaddr6part(&local, addr6part(&local) & ~((context->prefix == 64) ? (u64)-1LL : (1LLU << (128 - context->prefix)) - 1LLU));
@@ -300,9 +300,14 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 	up = &context->next;
     }
     
-  if (!parm.found_context)
-    return;
-    
+  /* If we're advertising only old prefixes, set router lifetime to zero. */
+  if (old_prefix && !parm.found_context)
+    ra->lifetime = htons(0);
+
+  /* No prefixes to advertise. */
+  if (!old_prefix && !parm.found_context)
+    return; 
+  
 #ifdef HAVE_LINUX_NETWORK
   /* Note that IPv6 MTU is not necessarilly the same as the IPv4 MTU
      available from SIOCGIFMTU */
@@ -425,7 +430,7 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
       else if (!IN6_IS_ADDR_LOOPBACK(local) &&
 	       !IN6_IS_ADDR_MULTICAST(local))
 	{
-	  int do_prefix = 0;
+	  int real_prefix = 0;
 	  int do_slaac = 0;
 	  int deprecate  = 0;
 	  int constructed = 0;
@@ -434,9 +439,9 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 	  
 	  for (context = daemon->dhcp6; context; context = context->next)
 	    if (!(context->flags & (CONTEXT_TEMPLATE | CONTEXT_OLD)) &&
-		prefix == context->prefix &&
-		is_same_net6(local, &context->start6, prefix) &&
-		is_same_net6(local, &context->end6, prefix))
+		prefix <= context->prefix &&
+		is_same_net6(local, &context->start6, context->prefix) &&
+		is_same_net6(local, &context->end6, context->prefix))
 	      {
 		context->saved_valid = valid;
 
@@ -491,7 +496,7 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 		    if (!param->first)
 		      context->ra_time = 0;
 		    context->flags |= CONTEXT_RA_DONE;
-		    do_prefix = 1;
+		    real_prefix = context->prefix;
 		  }
 
 		param->first = 0;	
@@ -518,18 +523,18 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 	      param->link_global = *local;
 	    }
 	  
-	  if (do_prefix)
+	  if (real_prefix != 0)
 	    {
 	      struct prefix_opt *opt;
 	     	      
 	      if ((opt = expand(sizeof(struct prefix_opt))))
 		{
 		  /* zero net part of address */
-		  setaddr6part(local, addr6part(local) & ~((prefix == 64) ? (u64)-1LL : (1LLU << (128 - prefix)) - 1LLU));
+		  setaddr6part(local, addr6part(local) & ~((real_prefix == 64) ? (u64)-1LL : (1LLU << (128 - real_prefix)) - 1LLU));
 		  
 		  opt->type = ICMP6_OPT_PREFIX;
 		  opt->len = 4;
-		  opt->prefix_len = prefix;
+		  opt->prefix_len = real_prefix;
 		  /* autonomous only if we're not doing dhcp, always set "on-link" */
 		  opt->flags = do_slaac ? 0xC0 : 0x80;
 		  opt->valid_lifetime = htonl(valid);
@@ -640,9 +645,9 @@ static int iface_search(struct in6_addr *local,  int prefix,
  
   for (context = daemon->dhcp6; context; context = context->next)
     if (!(context->flags & (CONTEXT_TEMPLATE | CONTEXT_OLD)) &&
-	prefix == context->prefix &&
-	is_same_net6(local, &context->start6, prefix) &&
-	is_same_net6(local, &context->end6, prefix) &&
+	prefix <= context->prefix &&
+	is_same_net6(local, &context->start6, context->prefix) &&
+	is_same_net6(local, &context->end6, context->prefix) &&
 	context->ra_time != 0 && 
 	difftime(context->ra_time, param->now) <= 0.0)
       {
@@ -665,9 +670,9 @@ static int iface_search(struct in6_addr *local,  int prefix,
 	/* zero timers for other contexts on the same subnet, so they don't timeout 
 	   independently */
 	for (context = context->next; context; context = context->next)
-	  if (prefix == context->prefix &&
-	      is_same_net6(local, &context->start6, prefix) &&
-	      is_same_net6(local, &context->end6, prefix))
+	  if (prefix <= context->prefix &&
+	      is_same_net6(local, &context->start6, context->prefix) &&
+	      is_same_net6(local, &context->end6, context->prefix))
 	    context->ra_time = 0;
 	
 	return 0; /* found, abort */

src/rfc2131.c

@@ -92,7 +92,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
   struct dhcp_netid known_id, iface_id, cpewan_id;
   struct dhcp_opt *o;
   unsigned char pxe_uuid[17];
-  unsigned char *oui = NULL, *serial = NULL, *class = NULL;
+  unsigned char *oui = NULL, *serial = NULL;
+#ifdef HAVE_SCRIPT
+  unsigned char *class = NULL;
+#endif
 
   subnet_addr.s_addr = override.s_addr = 0;
 
@@ -156,8 +159,9 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 		  unsigned char *y = option_ptr(opt, offset + elen + 5);
 		  oui = option_find1(x, y, 1, 1);
 		  serial = option_find1(x, y, 2, 1);
-		  class = option_find1(x, y, 3, 1);
-		  
+#ifdef HAVE_SCRIPT
+		  class = option_find1(x, y, 3, 1);		  
+#endif
 		  /* If TR069-id is present set the tag "cpewan-id" to facilitate echoing 
 		     the gateway id back. Note that the device class is optional */
 		  if (oui && serial)

src/tftp.c

@@ -60,7 +60,12 @@ void tftp_request(struct listener *listen, time_t now)
   char *prefix = daemon->tftp_prefix;
   struct tftp_prefix *pref;
   struct all_addr addra;
-
+#ifdef HAVE_IPV6
+  /* Can always get recvd interface for IPv6 */
+  int check_dest = !option_bool(OPT_NOWILD) || listen->family == AF_INET6;
+#else
+  int check_dest = !option_bool(OPT_NOWILD);
+#endif
   union {
     struct cmsghdr align; /* this ensures alignment */
 #ifdef HAVE_IPV6
@@ -91,8 +96,9 @@ void tftp_request(struct listener *listen, time_t now)
 
   if ((len = recvmsg(listen->tftpfd, &msg, 0)) < 2)
     return;
-  
-  if (option_bool(OPT_NOWILD))
+
+  /* Can always get recvd interface for IPv6 */
+  if (!check_dest)
     {
       if (listen->iface)
 	{

src/util.c

@@ -28,28 +28,6 @@
 #include <idna.h>
 #endif
 
-#ifdef HAVE_ARC4RANDOM
-void rand_init(void)
-{
-  return;
-}
-
-unsigned short rand16(void)
-{
-   return (unsigned short) (arc4random() >> 15);
-}
-
-u64 rand64(void)
-{
-  u64 ret;
-
-  arc4random_buf(&ret, sizeof(ret));
-
-  return ret;
-}
-
-#else
-
 /* SURF random number generator */
 
 static u32 seed[32];
@@ -119,8 +97,6 @@ u64 rand64(void)
   return (u64)out[outleft+1] + (((u64)out[outleft]) << 32);
 }
 
-#endif
-
 static int check_name(char *in)
 {
   /* remove trailing . 
@@ -482,7 +458,7 @@ int parse_hex(char *in, unsigned char *out, int maxlen,
 		  int j, bytes = (1 + (r - in))/2;
 		  for (j = 0; j < bytes; j++)
 		    { 
-		      char sav;
+		      char sav = sav;
 		      if (j < bytes - 1)
 			{
 			  sav = in[(j+1)*2];