Fix multiple SIP realtime issues

1. Set lastms to 0 when clearing instead of ""
2. Don't set ipaddr or port to the string "(null)" when they are empty
3. Add missing required fields, set default for lastms to 0, and modify
   the length of the ipaddr field to 45 in the Postgresql realtime.sql
   file.

(closes issue ASTERISK-19172)
Review: https://reviewboard.asterisk.org/r/1703/
........

Merged revisions 354348 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@354349 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -4547,8 +4547,8 @@ static void realtime_update_peer(const char *peername, struct ast_sockaddr *addr
 
 	snprintf(str_lastms, sizeof(str_lastms), "%d", lastms);
 	snprintf(regseconds, sizeof(regseconds), "%d", (int)nowtime);	/* Expiration time */
-	ast_copy_string(ipaddr, ast_sockaddr_stringify_addr(addr), sizeof(ipaddr));
-	ast_copy_string(port, ast_sockaddr_stringify_port(addr), sizeof(port));
+	ast_copy_string(ipaddr, ast_sockaddr_isnull(addr) ? "" : ast_sockaddr_stringify_addr(addr), sizeof(ipaddr));
+	ast_copy_string(port, ast_sockaddr_port(addr) ? ast_sockaddr_stringify_port(addr) : "", sizeof(port));
 
 	if (ast_strlen_zero(sysname))	/* No system name, disable this */
 		sysname = NULL;
@@ -14047,7 +14047,7 @@ static void destroy_association(struct sip_peer *peer)
 
 	if (!sip_cfg.ignore_regexpire) {
 		if (peer->rt_fromcontact && sip_cfg.peer_rtupdate) {
-			ast_update_realtime(tablename, "name", peer->name, "fullcontact", "", "ipaddr", "", "port", "", "regseconds", "0", "regserver", "", "useragent", "", "lastms", "", SENTINEL);
+			ast_update_realtime(tablename, "name", peer->name, "fullcontact", "", "ipaddr", "", "port", "", "regseconds", "0", "regserver", "", "useragent", "", "lastms", "0", SENTINEL);
 		} else {
 			ast_db_del("SIP/Registry", peer->name);
 			ast_db_del("SIP/PeerMethods", peer->name);

contrib/realtime/postgresql/realtime.sql

@@ -65,10 +65,14 @@ disallow character varying(100) DEFAULT 'all',
 allow character varying(100) DEFAULT 'g729;ilbc;gsm;ulaw;alaw',
 musiconhold character varying(100),
 regseconds bigint DEFAULT 0::bigint NOT NULL,
-ipaddr character varying(40) DEFAULT '' NOT NULL,
+ipaddr character varying(45) DEFAULT '' NOT NULL,
 regexten character varying(80) DEFAULT '' NOT NULL,
 cancallforward character varying(3) DEFAULT 'yes',
-lastms integer DEFAULT -1 NOT NULL
+lastms integer DEFAULT 0 NOT NULL,
+defaultuser character varying(80),
+fullcontact character varying(80),
+regserver character varying(30),
+useragent character varying(40)
 );
 
 drop table voicemail_users;