SOA serial tweak.

CHANGELOG

@@ -1,3 +1,8 @@
+version 2.65
+	    Fix regression which broke forwarding of queries sent via
+	    TCP which are not for A and AAAA and which were directed to
+	    non-default servers. Thanks to Niax for the bug report.
+
 version 2.64
             Handle DHCP FQDN options with all flag bits zero and
             --dhcp-client-update set. Thanks to Bernd Krumbroeck for

src/auth.c

@@ -16,6 +16,7 @@
 
 #include "dnsmasq.h"
 
+
 static struct subnet *filter_zone(struct auth_zone *zone, int flag, struct all_addr *addr_u)
 {
   struct subnet *subnet;
@@ -44,20 +45,52 @@ static struct subnet *filter_zone(struct auth_zone *zone, int flag, struct all_a
   return NULL;
 }
 
+static int in_zone(struct auth_zone *zone, char *name, char **cut)
+{
+  size_t namelen = strlen(name);
+  size_t domainlen = strlen(zone->domain);
+
+  if (cut)
+    *cut = NULL;
+  
+  if (namelen >= domainlen && 
+      hostname_isequal(zone->domain, &name[namelen - domainlen]))
+    {
+      
+      if (namelen == domainlen)
+	return 1;
+      
+      if (name[namelen - domainlen - 1] == '.')
+	{
+	  if (cut)
+	    *cut = &name[namelen - domainlen - 1]; 
+	  return 1;
+	}
+    }
+
+  return 0;
+}
 
 
-size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now) 
+size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr) 
 {
   char *name = daemon->namebuff;
   unsigned char *p, *ansp;
   int qtype, qclass;
-  unsigned int nameoffset;
+  int nameoffset, axfroffset = 0;
   int q, anscount = 0, authcount = 0;
   struct crec *crecp;
-  int  auth = 1, trunc = 0, nxdomain = 1, soa = 0, ns = 0;
+  int  auth = 1, trunc = 0, nxdomain = 1, soa = 0, ns = 0, axfr = 0;
   struct auth_zone *zone = NULL;
   struct subnet *subnet = NULL;
-
+  char *cut;
+  struct mx_srv_record *rec, *move, **up;
+  struct txt_record *txt;
+  struct interface_name *intr;
+  struct naptr *na;
+  struct all_addr addr;
+  struct cname *a;
+  
   if (ntohs(header->qdcount) == 0 || OPCODE(header) != QUERY )
     return 0;
   
@@ -70,16 +103,9 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 
   for (q = ntohs(header->qdcount); q != 0; q--)
     {
-      size_t domainlen, namelen;
       unsigned short flag = 0;
       int found = 0;
-      struct mx_srv_record *rec, *move, **up;
-      struct txt_record *txt;
-      struct interface_name *intr;
-      struct naptr *na;
-      struct all_addr addr;
-      struct cname *a;
-
+  
       /* save pointer to name for copying into answers */
       nameoffset = p - (unsigned char *)header;
 
@@ -92,7 +118,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
       
       if (qclass != C_IN)
 	continue;
-      
+
       if (qtype == T_PTR)
 	{
 	  if (!(flag = in_arpa_name_2_addr(name, &addr)))
@@ -107,9 +133,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	      auth = 0;
 	      continue;
 	    }
- 
-	  domainlen = strlen(zone->domain);
-	  
+ 	  
 	  if (flag == F_IPV4)
 	    {
 	      for (intr = daemon->int_names; intr; intr = intr->next)
@@ -123,10 +147,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 
 	      if (intr)
 		{
-		  namelen = strlen(intr->name);
-		  
-		  if (namelen >= domainlen && hostname_isequal(zone->domain, &intr->name[namelen - domainlen]) &&
-		      (namelen == domainlen || intr->name[namelen - domainlen - 1] == '.'))
+		  if (in_zone(zone, intr->name, NULL))
 		    {	
 		      found = 1;
 		      log_query(F_IPV4 | F_REVERSE | F_CONFIG, intr->name, &addr, NULL);
@@ -158,17 +179,8 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 					  T_PTR, C_IN, "d", name))
 		    anscount++;
 		}
-	      else if (crecp->flags & (F_DHCP | F_HOSTS))
+	      else if (crecp->flags & (F_DHCP | F_HOSTS) && in_zone(zone, name, NULL))
 		{
-		  namelen = strlen(name);
-		  
-		  if (namelen > domainlen + 1 &&
-		      name[namelen - domainlen - 1] != '.')
-		    continue;
-		  if (namelen < domainlen ||
-		      !hostname_isequal(zone->domain, &name[namelen - domainlen]))
-		    continue; /* wrong domain */
-		  
 		  log_query(crecp->flags & ~F_FORWARD, name, &addr, record_source(crecp->uid));
 		  found = 1;
 		  if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
@@ -188,16 +200,9 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	}
       
     cname_restart:
-      namelen = strlen(name);
-      
       for (zone = daemon->auth_zones; zone; zone = zone->next)
-	{
-	  domainlen = strlen(zone->domain);
-	  if (namelen >= domainlen && 
-	      hostname_isequal(zone->domain, &name[namelen - domainlen]) &&
-	      (namelen == domainlen || name[namelen - domainlen - 1] == '.'))
-	    break;
-	}
+	if (in_zone(zone, name, &cut))
+	  break;
       
       if (!zone)
 	{
@@ -340,24 +345,65 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	flag = F_IPV6;
 #endif
 
-      if (qtype == T_SOA && namelen == domainlen)
+      if (!cut)
 	{
-	  soa = 1; /* inhibits auth section */
-	  found = 1;
-	  log_query(F_RRNAME | F_AUTH, zone->domain, NULL, "<SOA>");
+	  nxdomain = 0;
+	  
+	  if (qtype == T_SOA)
+	    {
+	      soa = 1; /* inhibits auth section */
+	      found = 1;
+	      log_query(F_RRNAME | F_AUTH, zone->domain, NULL, "<SOA>");
+	    }
+      	  else if (qtype == T_AXFR)
+	    {
+	      if (daemon->auth_peers)
+		{
+		  struct iname *peers;
+		  
+		  if (peer_addr->sa.sa_family == AF_INET)
+		    peer_addr->in.sin_port = 0;
+#ifdef HAVE_IPV6
+		  else
+		    peer_addr->in6.sin6_port = 0; 
+#endif
+		  
+		  for (peers = daemon->auth_peers; peers; peers = peers->next)
+		    if (sockaddr_isequal(peer_addr, &peers->addr))
+		      break;
+		  
+		  if (!peers)
+		    {
+		      if (peer_addr->sa.sa_family == AF_INET)
+			inet_ntop(AF_INET, &peer_addr->in.sin_addr, daemon->addrbuff, ADDRSTRLEN);
+#ifdef HAVE_IPV6
+		      else
+			inet_ntop(AF_INET6, &peer_addr->in6.sin6_addr, daemon->addrbuff, ADDRSTRLEN); 
+#endif
+		      
+		      my_syslog(LOG_WARNING, _("ignoring zone transfer request from %s"), daemon->addrbuff);
+		      return 0;
+		    }
+		}
+	      
+	      soa = 1; /* inhibits auth section */
+	      ns = 1; /* ensure we include NS records! */
+	      axfr = 1;
+	      found = 1;
+	      axfroffset = nameoffset;
+	      log_query(F_RRNAME | F_AUTH, zone->domain, NULL, "<AXFR>");
+	    }
+      	  else if (qtype == T_NS)
+	    {
+	      ns = 1; /* inhibits auth section */
+	      found = 1;
+	      log_query(F_RRNAME | F_AUTH, zone->domain, NULL, "<NS>"); 
+	    }
 	}
       
-      if (qtype == T_NS && namelen == domainlen)
-	{
-	  ns = 1; /* inhibits auth section */
-	  found = 1;
-	  log_query(F_RRNAME | F_AUTH, zone->domain, NULL, "<NS>"); 
-	}
-      
-      
-      if (!option_bool(OPT_DHCP_FQDN) && namelen > domainlen + 1)
+      if (!option_bool(OPT_DHCP_FQDN) && cut)
 	{	  
-	  name[namelen - domainlen - 1] = 0; /* remove domain part */
+	  *cut = 0; /* remove domain part */
 	  
 	  if (!strchr(name, '.') && (crecp = cache_find_by_name(NULL, name, now, F_IPV4 | F_IPV6)))
 	    {
@@ -367,9 +413,9 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		    nxdomain = 0;
 		    if ((crecp->flags & flag) && filter_zone(zone, flag, &(crecp->addr.addr)))
 		      {
-			name[namelen - domainlen - 1] = '.'; /* restore domain part */
+			*cut = '.'; /* restore domain part */
 			log_query(crecp->flags, name, &crecp->addr.addr, record_source(crecp->uid));
-			name[namelen - domainlen - 1] = 0; /* remove domain part */
+			*cut  = 0; /* remove domain part */
 			found = 1;
 			if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
 						daemon->auth_ttl, NULL, qtype, C_IN, 
@@ -379,7 +425,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		  } while ((crecp = cache_find_by_name(crecp, name, now,  F_IPV4 | F_IPV6)));
 	    }
        	  
-	  name[namelen - domainlen - 1] = '.'; /* restore domain part */	    
+	  *cut = '.'; /* restore domain part */	    
 	}
       
       if ((crecp = cache_find_by_name(NULL, name, now, F_IPV4 | F_IPV6)))
@@ -408,11 +454,17 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
   /* Add auth section */
   if (auth)
     {
+      char *authname;
+      int newoffset, offset = 0;
+
       if (!subnet)
-	name = zone->domain;
+	authname = zone->domain;
       else
 	{
 	  /* handle NS and SOA for PTR records */
+	  
+	  authname = name;
+
 	  if (!subnet->is6)
 	    {
 	      in_addr_t a = ntohl(subnet->addr4.s_addr) >> 8;
@@ -445,30 +497,216 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	}
       
       /* handle NS and SOA in auth section or for explicit queries */
-      if ((anscount != 0 || ns) && 
-	  add_resource_record(header, limit, &trunc, 0, &ansp, 
-			      daemon->auth_ttl, NULL, T_NS, C_IN, "d", name, daemon->authserver))
-	{
-	  if (ns) 
-	    anscount++;
-	  else
-	    authcount++;
-	}
-      
-      if ((anscount == 0 || soa) &&
+       newoffset = ansp - (unsigned char *)header;
+       if (((anscount == 0 && !ns) || soa) &&
 	  add_resource_record(header, limit, &trunc, 0, &ansp, 
 			      daemon->auth_ttl, NULL, T_SOA, C_IN, "ddlllll",
-			      name, daemon->authserver,  daemon->hostmaster,
+			      authname, daemon->authserver,  daemon->hostmaster,
 			      daemon->soa_sn, daemon->soa_refresh, 
 			      daemon->soa_retry, daemon->soa_expiry, 
 			      daemon->auth_ttl))
 	{
+	  offset = newoffset;
 	  if (soa)
 	    anscount++;
 	  else
 	    authcount++;
 	}
-    }
+      
+      if (anscount != 0 || ns)
+	{
+	  struct name_list *secondary;
+	  
+	  newoffset = ansp - (unsigned char *)header;
+	  if (add_resource_record(header, limit, &trunc, -offset, &ansp, 
+				  daemon->auth_ttl, NULL, T_NS, C_IN, "d", offset == 0 ? authname : NULL, daemon->authserver))
+	    {
+	      if (offset == 0) 
+		offset = newoffset;
+	      if (ns) 
+		anscount++;
+	      else
+		authcount++;
+	    }
+
+	  if (!subnet)
+	    for (secondary = daemon->secondary_forward_server; secondary; secondary = secondary->next)
+	      if (add_resource_record(header, limit, &trunc, offset, &ansp, 
+				      daemon->auth_ttl, NULL, T_NS, C_IN, "d", secondary->name))
+		{
+		  if (ns) 
+		    anscount++;
+		  else
+		    authcount++;
+		}
+	}
+      
+      if (axfr)
+	{
+	  for (rec = daemon->mxnames; rec; rec = rec->next)
+	    if (in_zone(zone, rec->name, &cut))
+	      {
+		if (cut)
+		   *cut = 0;
+
+		if (rec->issrv)
+		  {
+		    if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, daemon->auth_ttl,
+					    NULL, T_SRV, C_IN, "sssd", cut ? rec->name : NULL,
+					    rec->priority, rec->weight, rec->srvport, rec->target))
+		      
+		      anscount++;
+		  }
+		else
+		  {
+		    if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, daemon->auth_ttl,
+					    NULL, T_MX, C_IN, "sd", cut ? rec->name : NULL, rec->weight, rec->target))
+		      anscount++;
+		  }
+		
+		/* restore config data */
+		if (cut)
+		  *cut = '.';
+	      }
+	      
+	  for (txt = daemon->rr; txt; txt = txt->next)
+	    if (in_zone(zone, txt->name, &cut))
+	      {
+		if (cut)
+		  *cut = 0;
+		
+		if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, daemon->auth_ttl,
+					NULL, txt->class, C_IN, "t",  cut ? txt->name : NULL, txt->len, txt->txt))
+		  anscount++;
+		
+		/* restore config data */
+		if (cut)
+		  *cut = '.';
+	      }
+	  
+	  for (txt = daemon->txt; txt; txt = txt->next)
+	    if (txt->class == C_IN && in_zone(zone, txt->name, &cut))
+	      {
+		if (cut)
+		  *cut = 0;
+		
+		if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, daemon->auth_ttl,
+					NULL, T_TXT, C_IN, "t", cut ? txt->name : NULL, txt->len, txt->txt))
+		  anscount++;
+		
+		/* restore config data */
+		if (cut)
+		  *cut = '.';
+	      }
+	  
+	  for (na = daemon->naptr; na; na = na->next)
+	    if (in_zone(zone, na->name, &cut))
+	      {
+		if (cut)
+		  *cut = 0;
+		
+		if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, daemon->auth_ttl, 
+					NULL, T_NAPTR, C_IN, "sszzzd", cut ? na->name : NULL,
+					na->order, na->pref, na->flags, na->services, na->regexp, na->replace))
+		  anscount++;
+		
+		/* restore config data */
+		if (cut)
+		  *cut = '.'; 
+	      }
+	  
+	  for (intr = daemon->int_names; intr; intr = intr->next)
+	    if (in_zone(zone, intr->name, &cut) && (addr.addr.addr4 = get_ifaddr(intr->intr)).s_addr != (in_addr_t) -1)
+	      {
+		if (cut)
+		  *cut = 0;
+		
+		if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
+					daemon->auth_ttl, NULL, T_A, C_IN, "4", cut ? intr->name : NULL, &addr))
+		  anscount++;
+		
+		/* restore config data */
+		if (cut)
+		  *cut = '.'; 
+	      }
+	  
+	  for (a = daemon->cnames; a; a = a->next)
+	    if (in_zone(zone, a->alias, &cut))
+	      {
+		strcpy(name, a->target);
+		if (!strchr(name, '.'))
+		  {
+		    strcat(name, ".");
+		    strcat(name, zone->domain);
+		  }
+		
+		if (cut)
+		  *cut = 0;
+		
+		if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
+					daemon->auth_ttl, NULL,
+					T_CNAME, C_IN, "d",  cut ? a->alias : NULL, name))
+		  anscount++;
+	      }
+	
+	  cache_enumerate(1);
+	  while ((crecp = cache_enumerate(0)))
+	    {
+	      if ((crecp->flags & (F_IPV4 | F_IPV6)) &&
+		  !(crecp->flags & (F_NEG | F_NXDOMAIN)) &&
+		  (crecp->flags & F_FORWARD))
+		{
+		  if ((crecp->flags & F_DHCP) && !option_bool(OPT_DHCP_FQDN))
+		    {
+		      char *cache_name = cache_get_name(crecp);
+		      if (!strchr(cache_name, '.') && filter_zone(zone, (crecp->flags & (F_IPV6 | F_IPV4)), &(crecp->addr.addr)))
+			{
+			  qtype = T_A;
+#ifdef HAVE_IPV6
+			  if (crecp->flags & F_IPV6)
+			    qtype = T_AAAA;
+#endif
+			  if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
+						  daemon->auth_ttl, NULL, qtype, C_IN, 
+						  (crecp->flags & F_IPV4) ? "4" : "6", cache_name, &crecp->addr))
+			    anscount++;
+			}
+		    }
+		  
+		  if ((crecp->flags & F_HOSTS) || (((crecp->flags & F_DHCP) && option_bool(OPT_DHCP_FQDN))))
+		    {
+		      strcpy(name, cache_get_name(crecp));
+		      if (in_zone(zone, name, &cut) && filter_zone(zone, (crecp->flags & (F_IPV6 | F_IPV4)), &(crecp->addr.addr)))
+			{
+			  qtype = T_A;
+#ifdef HAVE_IPV6
+			  if (crecp->flags & F_IPV6)
+			    qtype = T_AAAA;
+#endif
+			   if (cut)
+			     *cut = 0;
+
+			   if (add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
+						   daemon->auth_ttl, NULL, qtype, C_IN, 
+						   (crecp->flags & F_IPV4) ? "4" : "6", cut ? name : NULL, &crecp->addr))
+			     anscount++;
+			}
+		    }
+		}
+	    }
+	   
+	  /* repeat SOA as last record */
+	  if (add_resource_record(header, limit, &trunc, axfroffset, &ansp, 
+				  daemon->auth_ttl, NULL, T_SOA, C_IN, "ddlllll",
+				  daemon->authserver,  daemon->hostmaster,
+				  daemon->soa_sn, daemon->soa_refresh, 
+				  daemon->soa_retry, daemon->soa_expiry, 
+				  daemon->auth_ttl))
+	    anscount++;
+	
+	}
+  
+}
   
   /* done all questions, set up header and return length of result */
   /* clear authoritative and truncated flags, set QR flag */
@@ -490,10 +728,11 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
     SET_RCODE(header, NOERROR); /* no error */
   header->ancount = htons(anscount);
   header->nscount = htons(authcount);
+  header->arcount = htons(0);
   return ansp - (unsigned char *)header;
 }
   
   
-
+  
 
 

src/cache.c

@@ -235,6 +235,29 @@ char *cache_get_name(struct crec *crecp)
   return crecp->name.sname;
 }
 
+struct crec *cache_enumerate(int init)
+{
+  static int bucket;
+  static struct crec *cache;
+
+  if (init)
+    {
+      bucket = 0;
+      cache = NULL;
+    }
+  else if (cache && cache->hash_next)
+    cache = cache->hash_next;
+  else
+    {
+       cache = NULL; 
+       while (bucket < hash_size)
+	 if ((cache = hash_table[bucket++]))
+	   break;
+    }
+  
+  return cache;
+}
+
 static int is_outdated_cname_pointer(struct crec *crecp)
 {
   if (!(crecp->flags & F_CNAME))

src/dns-protocol.h

@@ -52,6 +52,7 @@
 #define T_OPT		41
 #define	T_TKEY		249		
 #define	T_TSIG		250
+#define T_AXFR          252
 #define T_MAILB		253	
 #define T_ANY		255
 

src/dnsmasq.h

@@ -756,12 +756,13 @@ extern struct daemon {
   char *username, *groupname, *scriptuser;
   char *luascript;
   char *authserver, *authinterface, *hostmaster;
+  struct name_list *secondary_forward_server;
   int group_set, osport;
   char *domain_suffix;
   struct cond_domain *cond_domain;
   char *runfile; 
   char *lease_change_command;
-  struct iname *if_names, *if_addrs, *if_except, *dhcp_except;
+  struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers;
   struct bogus_addr *bogus_addr;
   struct server *servers;
   int log_fac; /* log facility */
@@ -870,6 +871,7 @@ struct in_addr a_record_from_hosts(char *name, time_t now);
 void cache_unhash_dhcp(void);
 void dump_cache(time_t now);
 char *cache_get_name(struct crec *crecp);
+struct crec *cache_enumerate(int init);
 char *get_domain(struct in_addr addr);
 #ifdef HAVE_IPV6
 char *get_domain6(struct in6_addr *addr);
@@ -899,15 +901,15 @@ size_t resize_packet(struct dns_header *header, size_t plen,
 		  unsigned char *pheader, size_t hlen);
 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
-			unsigned int nameoffset, unsigned char **pp, unsigned long ttl, 
-			unsigned int *offset, unsigned short type, unsigned short class, char *format, ...);
+			int nameoffset, unsigned char **pp, unsigned long ttl, 
+			int *offset, unsigned short type, unsigned short class, char *format, ...);
 unsigned char *skip_questions(struct dns_header *header, size_t plen);
 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, 
 		 char *name, int isExtract, int extrabytes);
 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
 
 /* auth.c */
-size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now);
+size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr);
 
 /* util.c */
 void rand_init(void);

src/forward.c

@@ -814,7 +814,7 @@ void receive_query(struct listener *listen, time_t now)
 
   if (auth_dns)
     {
-      m = answer_auth(header, ((char *) header) + PACKETSZ, (size_t)n, now);
+      m = answer_auth(header, ((char *) header) + PACKETSZ, (size_t)n, now, &source_addr);
       if (m >= 1)
 	send_from(listen->fd, option_bool(OPT_NOWILD) || option_bool(OPT_CLEVERBIND),
 		  (char *)header, m, &source_addr, &dst_addr, if_index);
@@ -849,7 +849,8 @@ unsigned char *tcp_request(int confd, time_t now,
   int norebind = 0;
   int checking_disabled;
   size_t m;
-  unsigned short qtype, gotname;
+  unsigned short qtype;
+  unsigned int gotname;
   unsigned char c1, c2;
   /* Max TCP packet + slop */
   unsigned char *packet = whine_malloc(65536 + MAXDNAME + RRFIXEDSZ);
@@ -903,7 +904,7 @@ unsigned char *tcp_request(int confd, time_t now,
 	dst_addr_4.s_addr = 0;
       
       if (auth_dns)
-	m = answer_auth(header, ((char *) header) + 65536, (size_t)size, now);
+	m = answer_auth(header, ((char *) header) + 65536, (size_t)size, now, &peer_addr);
       else
 	{
 	  /* m > 0 if answered from cache */
@@ -1042,7 +1043,8 @@ unsigned char *tcp_request(int confd, time_t now,
       
       c1 = m>>8;
       c2 = m;
-      if (!read_write(confd, &c1, 1, 0) ||
+      if (m == 0 ||
+	  !read_write(confd, &c1, 1, 0) ||
 	  !read_write(confd, &c2, 1, 0) || 
 	  !read_write(confd, packet, m, 0))
 	return packet;

src/lease.c

@@ -420,6 +420,11 @@ void lease_update_dns(int force)
 
   if (daemon->port != 0 && (dns_dirty || force))
     {
+#ifndef HAVE_BROKEN_RTC
+      /* force transfer to authoritative secondaries */
+      daemon->soa_sn++;
+#endif
+      
       cache_unhash_dhcp();
 
       for (lease = leases; lease; lease = lease->next)

src/option.c

@@ -123,8 +123,10 @@ struct myoption {
 #define LOPT_MAXCTTL   312
 #define LOPT_AUTHZONE  313
 #define LOPT_AUTHSERV  314
-#define LOPT_AUTHTTL  315
+#define LOPT_AUTHTTL   315
 #define LOPT_AUTHSOA   316
+#define LOPT_AUTHSFS   317
+#define LOPT_AUTHPEER  318
 
 #ifdef HAVE_GETOPT_LONG
 static const struct option opts[] =  
@@ -255,6 +257,8 @@ static const struct myoption opts[] =
     { "auth-server", 1, 0, LOPT_AUTHSERV },
     { "auth-ttl", 1, 0, LOPT_AUTHTTL },
     { "auth-soa", 1, 0, LOPT_AUTHSOA },
+    { "auth-sec-servers", 1, 0, LOPT_AUTHSFS },
+    { "auth-peer", 1, 0, LOPT_AUTHPEER }, 
     { NULL, 0, 0, 0 }
   };
 
@@ -391,6 +395,8 @@ static struct {
   { LOPT_AUTHZONE, ARG_DUP, "<domain>,<subnet>[,<subnet>]", gettext_noop("Domain to export to global DNS"), NULL },
   { LOPT_AUTHTTL, ARG_ONE, "<integer>", gettext_noop("Set TTL for authoritative replies"), NULL },
   { LOPT_AUTHSOA, ARG_ONE, "<serial>[,...]", gettext_noop("Set authoritive zone information"), NULL },
+  { LOPT_AUTHSFS, ARG_DUP, "<NS>[,<NS>...]", gettext_noop("Secondary authoritative nameservers for forward domains"), NULL },
+  { LOPT_AUTHPEER, ARG_DUP, "<ipaddr>[,<ipaddr>...]", gettext_noop("Peers which are allowed to do zone transfer"), NULL },
   { 0, 0, NULL, NULL, NULL }
 }; 
 
@@ -1525,7 +1531,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	    new->next = daemon->dhcp_hosts_file;
 	    daemon->dhcp_hosts_file = new;
 	  }
-	else if (option ==  LOPT_DHCP_OPTS)
+	else if (option == LOPT_DHCP_OPTS)
 	  {
 	    new->next = daemon->dhcp_opts_file;
 	    daemon->dhcp_opts_file = new;
@@ -1541,7 +1547,22 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       daemon->authinterface = opt_string_alloc(comma);
       
       break;
-      
+
+    case LOPT_AUTHSFS: /* --auth-sec-servers */
+      {
+	struct name_list *new;
+
+	do {
+	  comma = split(arg);
+	  new = safe_malloc(sizeof(struct name_list));
+	  new->name = opt_string_alloc(arg);
+	  new->next = daemon->secondary_forward_server;
+	  daemon->secondary_forward_server = new;
+	  arg = comma;
+	} while (arg);
+	break;
+      }
+	
     case LOPT_AUTHZONE: /* --auth-zone */
       {
 	struct auth_zone *new;
@@ -1853,14 +1874,15 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
       }
       
     case 'a':  /* --listen-address */
+    case LOPT_AUTHPEER: /* --auth-peer */
       do {
 	struct iname *new = opt_malloc(sizeof(struct iname));
 	comma = split(arg);
 	unhide_metas(arg);
-	new->next = daemon->if_addrs;
 	if (arg && (new->addr.in.sin_addr.s_addr = inet_addr(arg)) != (in_addr_t)-1)
 	  {
 	    new->addr.sa.sa_family = AF_INET;
+	    new->addr.in.sin_port = 0;
 #ifdef HAVE_SOCKADDR_SA_LEN
 	    new->addr.in.sin_len = sizeof(new->addr.in);
 #endif
@@ -1871,6 +1893,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	    new->addr.sa.sa_family = AF_INET6;
 	    new->addr.in6.sin6_flowinfo = 0;
 	    new->addr.in6.sin6_scope_id = 0;
+	    new->addr.in6.sin6_port = 0;
 #ifdef HAVE_SOCKADDR_SA_LEN
 	    new->addr.in6.sin6_len = sizeof(new->addr.in6);
 #endif
@@ -1880,7 +1903,16 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	  ret_err(gen_err);
 
 	new->used = 0;
-	daemon->if_addrs = new;
+	if (option == 'a')
+	  {
+	    new->next = daemon->if_addrs;
+	    daemon->if_addrs = new;
+	  }
+	else
+	  {
+	    new->next = daemon->auth_peers;
+	    daemon->auth_peers = new;
+	  } 
 	arg = comma;
       } while (arg);
       break;

src/rfc1035.c

@@ -1185,8 +1185,8 @@ int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
   return 0;
 }
 
-int add_resource_record(struct dns_header *header, char *limit, int *truncp, unsigned int nameoffset, unsigned char **pp, 
-			unsigned long ttl, unsigned int *offset, unsigned short type, unsigned short class, char *format, ...)
+int add_resource_record(struct dns_header *header, char *limit, int *truncp, int nameoffset, unsigned char **pp, 
+			unsigned long ttl, int *offset, unsigned short type, unsigned short class, char *format, ...)
 {
   va_list ap;
   unsigned char *sav, *p = *pp;
@@ -1200,14 +1200,21 @@ int add_resource_record(struct dns_header *header, char *limit, int *truncp, uns
  
   va_start(ap, format);   /* make ap point to 1st unamed argument */
   
-  if (nameoffset != 0)
+  if (nameoffset > 0)
     {
       PUTSHORT(nameoffset | 0xc000, p);
     }
   else
     {
-      p = do_rfc1035_name(p, va_arg(ap, char *));
-      *p++ = 0;
+      char *name = va_arg(ap, char *);
+      if (name)
+	p = do_rfc1035_name(p, name);
+      if (nameoffset < 0)
+	{
+	  PUTSHORT(-nameoffset | 0xc000, p);
+	}
+      else
+	*p++ = 0;
     }
 
   PUTSHORT(type, p);
@@ -1312,7 +1319,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
   unsigned char *p, *ansp, *pheader;
   int qtype, qclass;
   struct all_addr addr;
-  unsigned int nameoffset;
+  int nameoffset;
   unsigned short flag;
   int q, ans, anscount = 0, addncount = 0;
   int dryrun = 0, sec_reqd = 0;
@@ -1694,7 +1701,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 		  ans = found = 1;
 		  if (!dryrun)
 		    {
-		      unsigned int offset;
+		      int offset;
 		      log_query(F_CONFIG | F_RRNAME, name, NULL, "<MX>");
 		      if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
 					      &offset, T_MX, C_IN, "sd", rec->weight, rec->target))
@@ -1732,7 +1739,7 @@ size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 		    found = ans = 1;
 		    if (!dryrun)
 		      {
-			unsigned int offset;
+			int offset;
 			log_query(F_CONFIG | F_RRNAME, name, NULL, "<SRV>");
 			if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl, 
 						&offset, T_SRV, C_IN, "sssd",