When trying to bind default broadcast (ipv6) fails, retry with broadcast ipv4.

diff --git a/webcit/tcp_sockets.c b/webcit/tcp_sockets.c
index 2835344f47eef51393adcfdc1ef66714ec07cc42..cb0ad320e393606f9877dce03b2810281582d53e 100644 (file)
--- a/webcit/tcp_sockets.c
+++ b/webcit/tcp_sockets.c
@@ -512,14 +512,17 @@ int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
  * port_number port number to bind
  * queue_len   number of incoming connections to allow in the queue
  */
-int webcit_tcp_server(char *ip_addr, int port_number, int queue_len)
+int webcit_tcp_server(const char *ip_addr, int port_number, int queue_len)
 {
+       const char *ipv4broadcast = "0.0.0.0";
+       int IsDefault = 0;
        struct protoent *p;
        struct sockaddr_in6 sin6;
        struct sockaddr_in sin4;
        int s, i, b;
        int ip_version = 6;
 
+retry:
        memset(&sin6, 0, sizeof(sin6));
        memset(&sin4, 0, sizeof(sin4));
        sin6.sin6_family = AF_INET6;
@@ -565,6 +568,12 @@ int webcit_tcp_server(char *ip_addr, int port_number, int queue_len)
 
        s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
        if (s < 0) {
+               if (IsDefault && (errno == EAFNOSUPPORT))
+               {
+                       s = 0;
+                       ip_addr = ipv4broadcast;
+                       goto retry;
+               }
                syslog(LOG_WARNING, "Can't create a listening socket: %s\n", strerror(errno));
                return (-WC_EXIT_BIND);
        }