reconfirm SLAAC addresses when DHCPv4 leases go though INIT_REBOOT state.

src/dnsmasq.h

@@ -1000,7 +1000,7 @@ u64 lease_find_max_addr6(struct dhcp_context *context);
 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
 #endif
 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
-		      unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now);
+		      unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
@@ -1166,7 +1166,7 @@ void ra_start_unsolicted(time_t now, struct dhcp_context *context);
 /* slaac.c */ 
 #ifdef HAVE_DHCP6
 void build_subnet_map(void);
-void slaac_add_addrs(struct dhcp_lease *lease, time_t now);
+void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
 void schedule_subnet_map(void);

src/lease.c

@@ -98,7 +98,7 @@ void lease_init(time_t now)
 	      hw_type = ARPHRD_ETHER; 
 
 	    lease_set_hwaddr(lease, (unsigned char *)daemon->dhcp_buff2, (unsigned char *)daemon->packet, 
-			     hw_len, hw_type, clid_len, now);
+			     hw_len, hw_type, clid_len, now, 0);
 	    
 	    if (strcmp(daemon->dhcp_buff, "*") !=  0)
 	      lease_set_hostname(lease, daemon->dhcp_buff, 0, get_domain(lease->addr), NULL);
@@ -119,7 +119,7 @@ void lease_init(time_t now)
 	    
 	    if ((lease = lease6_allocate(&addr.addr.addr6, lease_type)))
 	      {
-		lease_set_hwaddr(lease, NULL, (unsigned char *)daemon->packet, 0, hw_type, clid_len, now);
+		lease_set_hwaddr(lease, NULL, (unsigned char *)daemon->packet, 0, hw_type, clid_len, now, 0);
 		
 		if (strcmp(daemon->dhcp_buff, "*") !=  0)
 		  lease_set_hostname(lease, daemon->dhcp_buff, 0, get_domain6((struct in6_addr *)lease->hwaddr), NULL);
@@ -702,13 +702,16 @@ void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now)
 } 
 
 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
-		      unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now)
+		      unsigned char *clid, int hw_len, int hw_type, int clid_len, 
+		      time_t now, int force)
 {
 #ifdef HAVE_DHCP6
-  int change = 0;
+  int change = force;
   lease->flags |= LEASE_HAVE_HWADDR;
 #endif
 
+  (void)force;
+
   if (hw_len != lease->hwaddr_len ||
       hw_type != lease->hwaddr_type || 
       (hw_len != 0 && memcmp(lease->hwaddr, hwaddr, hw_len) != 0))
@@ -758,7 +761,7 @@ void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
   
 #ifdef HAVE_DHCP6
   if (change)
-    slaac_add_addrs(lease, now);
+    slaac_add_addrs(lease, now, force);
 #endif
 }
 
@@ -886,7 +889,7 @@ void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now)
   lease->flags |= LEASE_CHANGED; 
 
 #ifdef HAVE_DHCP6
-  slaac_add_addrs(lease, now);
+  slaac_add_addrs(lease, now, 0);
 #endif
 }
 

src/rfc2131.c

@@ -483,7 +483,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	    {
 	      logaddr = &mess->yiaddr;
 		
-	      lease_set_hwaddr(lease, mess->chaddr, NULL, mess->hlen, mess->htype, 0, now);
+	      lease_set_hwaddr(lease, mess->chaddr, NULL, mess->hlen, mess->htype, 0, now, 1);
 	      if (hostname)
 		lease_set_hostname(lease, hostname, 1, get_domain(lease->addr), domain); 
 	      /* infinite lease unless nailed in dhcp-host line. */
@@ -1281,7 +1281,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	    }
 	  
 	  time = calc_time(context, config, option_find(mess, sz, OPTION_LEASE_TIME, 4));
-	  lease_set_hwaddr(lease, mess->chaddr, clid, mess->hlen, mess->htype, clid_len, now);
+	  lease_set_hwaddr(lease, mess->chaddr, clid, mess->hlen, mess->htype, clid_len, now, do_classes);
 	  
 	  /* if all the netids in the ignore_name list are present, ignore client-supplied name */
 	  if (!hostname_auth)

src/rfc3315.c

@@ -637,7 +637,7 @@ static int dhcp6_no_relay(int msg_type, struct in6_addr *link_address, struct dh
 			if (lease)
 			  {
 			    lease_set_expires(lease, lease_time, now);
-			    lease_set_hwaddr(lease, NULL, clid, 0, iaid, clid_len, now);
+			    lease_set_hwaddr(lease, NULL, clid, 0, iaid, clid_len, now, 0);
 			    lease_set_interface(lease, interface, now);
 			    if (hostname && ia_type == OPTION6_IA_NA)
 			      {

src/slaac.c

@@ -23,12 +23,13 @@
 static int map_rebuild = 0;
 static int ping_id = 0;
 
-void slaac_add_addrs(struct dhcp_lease *lease, time_t now)
+void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force)
 {
   struct slaac_address *slaac, *old, **up;
   struct dhcp_context *context;
   
   if (!(lease->flags & LEASE_HAVE_HWADDR) || 
+      (lease->flags & (LEASE_TA | LEASE_NA)) ||
       lease->last_interface == 0 ||
       !lease->hostname)
     return ;
@@ -72,6 +73,13 @@ void slaac_add_addrs(struct dhcp_lease *lease, time_t now)
 	    if (IN6_ARE_ADDR_EQUAL(&addr, &slaac->addr))
 	      {
 		*up = slaac->next;
+		/* recheck when DHCPv4 goes through init-reboot */
+		if (force)
+		  {
+		    slaac->ping_time = now;
+		    slaac->backoff = 1;
+		    lease_update_dns(1);
+		  }
 		break;
 	      }
 	    up = &slaac->next;