Fix RA on *BSD (missing sa_len)

src/forward.c

@@ -106,8 +106,11 @@ void send_from(int fd, int nowild, char *packet, size_t len,
 	  msg.msg_controllen = 0;
 	  goto retry;
 	}
+      
       if (retry_send())
 	goto retry;
+      
+      my_syslog(LOG_ERR, _("failed to send packet: %s"), strerror(errno));
     }
 }
           

src/radv.c

@@ -20,10 +20,11 @@
    not used by DHCPv4 code. */
 
 #include "dnsmasq.h"
-#include <netinet/icmp6.h>
 
 #ifdef HAVE_DHCP6
 
+#include <netinet/icmp6.h>
+
 struct ra_param {
   int ind, managed, found_context, first;
   char *if_name;
@@ -102,8 +103,7 @@ void ra_start_unsolicted(time_t now)
    for (context = daemon->ra_contexts; context; context = context->next)
      context->ra_time = now + (rand16()/13000);
 
-   /* re-do ras after a short time, in case the first gets lost.
-      This is reset once that's done. */
+   /* re-do frequently for a minute or so, in case the first gets lost. */
    ra_short_period_start = now;
 }
 
@@ -241,6 +241,9 @@ static void send_ra(int iface, char *iface_name, struct in6_addr *dest)
 
   /* decide where we're sending */
   memset(&addr, 0, sizeof(addr));
+#ifdef HAVE_SOCKADDR_SA_LEN
+  addr.sin6_len = sizeof(struct sockaddr_in6);
+#endif
   addr.sin6_family = AF_INET6;
   addr.sin6_port = htons(IPPROTO_ICMPV6);
   if (dest)