Fix MWI notification transmission problems over SIP.

MWI updates were not being sent if no messages were found in the event cache.
This was corrected since a phone may need to clear its MWI status configured
previously from another mailbox.

Upon module or sip reload, MWI updates could not be sent due to the sipsock
socket not being set early enough in reload_config. The code handling the
descriptor assignment and such has simply been moved before the call to
build_peer.

Issuing a sip reload cleared the IP address of the peer, but skipped checking
the database for registration information. The database is now checked both
for sip reload and actually reloading the module.

If a transmission occurs before the do_monitor thread has started, do not
attempt to send a signal to it.

(closes issue #17398)
Reported by: ip-rob


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@276571 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -3483,7 +3483,9 @@ static enum sip_result __sip_reliable_xmit(struct sip_pvt *p, int seqno, int res
 		 * only wakes up every 1000ms by default, we have to poke the thread here to make
 		 * sure it successfully detects this must be retransmitted in less time than
 		 * it usually sleeps for. Otherwise it might not retransmit this packet for 1000ms. */
+		if (monitor_thread != AST_PTHREADT_NULL) {
 			pthread_kill(monitor_thread, SIGURG);
+		}
 		return AST_SUCCESS;
 	}
 }
@@ -23873,14 +23875,12 @@ static int sip_send_mwi_to_peer(struct sip_peer *peer, const struct ast_event *e
 	if (event) {
 		newmsgs = ast_event_get_ie_uint(event, AST_EVENT_IE_NEWMSGS);
 		oldmsgs = ast_event_get_ie_uint(event, AST_EVENT_IE_OLDMSGS);
-	} else if (!get_cached_mwi(peer, &newmsgs, &oldmsgs)) {
+	} else if (!cache_only) { /* Fall back to manually checking the mailbox */
-		/* got it!  Don't keep looking. */
-	} else if (cache_only) {
-		return 0;
-	} else { /* Fall back to manually checking the mailbox */
 		struct ast_str *mailbox_str = ast_str_alloca(512);
 		peer_mailboxes_to_str(&mailbox_str, peer);
 		ast_app_inboxcount(mailbox_str->str, &newmsgs, &oldmsgs);
+	} else {
+		get_cached_mwi(peer, &newmsgs, &oldmsgs);
 	}
 	
 	if (peer->mwipvt) {
@@ -25954,7 +25954,7 @@ static struct sip_peer *build_peer(const char *name, struct ast_variable *v, str
 	if (ast_test_flag(&peer->flags[1], SIP_PAGE2_ALLOWSUBSCRIBE)) {
 		sip_cfg.allowsubscribe = TRUE;	/* No global ban any more */
 	}
-	if (!found && peer->host_dynamic && !peer->is_realtime) {
+	if (peer->host_dynamic && !peer->is_realtime) {
 		reg_source_db(peer);
 	}
 
@@ -26719,6 +26719,50 @@ static int reload_config(enum channelreloadreason reason)
  			authl = add_realm_authentication(authl, v->value, v->lineno);
  	}
 
+	ast_mutex_lock(&netlock);
+	if ((sipsock > -1) && (ast_sockaddr_cmp(&old_bindaddr, &bindaddr))) {
+		close(sipsock);
+		sipsock = -1;
+	}
+	if (sipsock < 0) {
+		sipsock = socket(ast_sockaddr_is_ipv6(&bindaddr) ?
+				 AF_INET6 : AF_INET, SOCK_DGRAM, 0);
+		if (sipsock < 0) {
+			ast_log(LOG_WARNING, "Unable to create SIP socket: %s\n", strerror(errno));
+			ast_config_destroy(cfg);
+			return -1;
+		} else {
+			/* Allow SIP clients on the same host to access us: */
+			const int reuseFlag = 1;
+
+			setsockopt(sipsock, SOL_SOCKET, SO_REUSEADDR,
+				   (const char*)&reuseFlag,
+				   sizeof reuseFlag);
+
+			ast_enable_packet_fragmentation(sipsock);
+
+			if (ast_bind(sipsock, &bindaddr) < 0) {
+				ast_log(LOG_WARNING, "Failed to bind to %s: %s\n",
+					ast_sockaddr_stringify(&bindaddr), strerror(errno));
+				close(sipsock);
+				sipsock = -1;
+			} else {
+				ast_verb(2, "SIP Listening on %s\n", ast_sockaddr_stringify(&bindaddr));
+				ast_set_qos(sipsock, global_tos_sip, global_cos_sip, "SIP");
+			}
+		}
+	}
+	if (stunaddr.sin_addr.s_addr != 0) {
+		ast_debug(1, "stun to %s:%d\n",
+			ast_inet_ntoa(stunaddr.sin_addr) , ntohs(stunaddr.sin_port));
+		ast_sockaddr_to_sin(&externip, &externip_sin);
+		ast_stun_request(sipsock, &stunaddr,
+			NULL, &externip_sin);
+		ast_debug(1, "STUN sees us at %s\n",
+			ast_sockaddr_stringify(&externip));
+	}
+	ast_mutex_unlock(&netlock);
+
 	if (ucfg) {
 		struct ast_variable *gen;
 		int genhassip, genregistersip;
@@ -26836,49 +26880,6 @@ static int reload_config(enum channelreloadreason reason)
 		ast_config_destroy(cfg);
 		return 0;
 	}
-	ast_mutex_lock(&netlock);
-	if ((sipsock > -1) && (ast_sockaddr_cmp(&old_bindaddr, &bindaddr))) {
-		close(sipsock);
-		sipsock = -1;
-	}
-	if (sipsock < 0) {
-		sipsock = socket(ast_sockaddr_is_ipv6(&bindaddr) ?
-				 AF_INET6 : AF_INET, SOCK_DGRAM, 0);
-		if (sipsock < 0) {
-			ast_log(LOG_WARNING, "Unable to create SIP socket: %s\n", strerror(errno));
-			ast_config_destroy(cfg);
-			return -1;
-		} else {
-			/* Allow SIP clients on the same host to access us: */
-			const int reuseFlag = 1;
-
-			setsockopt(sipsock, SOL_SOCKET, SO_REUSEADDR,
-				   (const char*)&reuseFlag,
-				   sizeof reuseFlag);
-
-			ast_enable_packet_fragmentation(sipsock);
-
-			if (ast_bind(sipsock, &bindaddr) < 0) {
-				ast_log(LOG_WARNING, "Failed to bind to %s: %s\n",
-					ast_sockaddr_stringify(&bindaddr), strerror(errno));
-				close(sipsock);
-				sipsock = -1;
-			} else {
-				ast_verb(2, "SIP Listening on %s\n", ast_sockaddr_stringify(&bindaddr));
-				ast_set_qos(sipsock, global_tos_sip, global_cos_sip, "SIP");
-			}
-		}
-	}
-	if (stunaddr.sin_addr.s_addr != 0) {
-		ast_debug(1, "stun to %s:%d\n",
-			ast_inet_ntoa(stunaddr.sin_addr) , ntohs(stunaddr.sin_port));
-		ast_sockaddr_to_sin(&externip, &externip_sin);
-		ast_stun_request(sipsock, &stunaddr,
-			NULL, &externip_sin);
-		ast_debug(1, "STUN sees us at %s\n",
-			ast_sockaddr_stringify(&externip));
-	}
-	ast_mutex_unlock(&netlock);
 
 	/* Start TCP server */
 	if (sip_cfg.tcp_enabled) {