channels/chan_sip: Fix RealTime error during SIP unregistration with MariaDB

When a SIP device that has its registration stored in RealTime unregisters,
the entry for that device is updated with blank values, i.e., "", indicating
that it is no longer registered. Unfortunately, one of those values that is
'blanked' is the device's port. If the column type for the port is not a
string datatype (the recommended type is integer), an ODBC or database error
will be thrown. MariaDB does not coerce empty strings to a valid integer value.

This patch updates the query run from chan_sip such that it replaces the port
value with a value of '0', as opposed to a blank value. This is the value that
other database backends coerce the empty string ("") to already, and the
handling of reading a RealTime registration value from a backend already
anticipates receiving a port of '0' from the backends.

ASTERISK-24772 #close
Reported by: Richard Miller
patches:
  chan_sip.diff uploaded by Richard Miller (License 5685)
........

Merged revisions 431673 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@431674 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index a3a97f30ae157dc6b5543f8c9648d7be3de5090e..f80197826b6e28e88b9d7d4e22d56fa85e1f3a47 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -15900,7 +15900,7 @@ 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", "0", SENTINEL);
+                       ast_update_realtime(tablename, "name", peer->name, "fullcontact", "", "ipaddr", "", "port", "0", "regseconds", "0", "regserver", "", "useragent", "", "lastms", "0", SENTINEL);
                } else {
                        ast_db_del("SIP/Registry", peer->name);
                        ast_db_del("SIP/RegistryPath", peer->name);