Set SO_KEEPALIVE on SIP TCP sockets so that they eventually go away when a peer

abruptly disappears.  This mostly occurs after a successful registration.

(closes issue #17544)
Reported by: marcelloceschia
Patches:
      (modified) tcptls.patch uploaded by st (license 907)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@317195 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index ce8637d8c15b7a0ae53162312e541d78ed8a7eea..4dfa20c51d7562901a5938a85049f565b9375d79 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3002,6 +3002,12 @@ static void *_sip_tcp_helper_thread(struct sip_pvt *pvt, struct ast_tcptls_sessi
                }
        }
 
+       flags = 1;
+       if (setsockopt(tcptls_session->fd, SOL_SOCKET, SO_KEEPALIVE, &flags, sizeof(flags))) {
+               ast_log(LOG_ERROR, "error enabling TCP keep-alives on sip socket: %s\n", strerror(errno));
+               goto cleanup;
+       }
+
        me->threadid = pthread_self();
        ast_debug(2, "Starting thread for %s server\n", tcptls_session->ssl ? "SSL" : "TCP");