res_pjsip: Enforce requirements for session timer minimum expiration period and normal expiration period.

This change enforces the requirements in PJSIP for session timer configuration. The minimum
expiration period must be 90 seconds or higher and the normal expiration period can not
be lower than the minimum expiration period. If either of these were done the code would
assert at session setup time.

ASTERISK-24336 #close
Reported by: Leon Rowland
........

Merged revisions 427978 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 427979 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@427980 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_pjsip/pjsip_configuration.c

@@ -955,6 +955,14 @@ static int sip_endpoint_apply_handler(const struct ast_sorcery *sorcery, void *o
 		ast_log(LOG_ERROR, "Invalid outbound proxy '%s' specified on endpoint '%s'\n",
 			endpoint->outbound_proxy, ast_sorcery_object_get_id(endpoint));
 		return -1;
+	} else if (endpoint->extensions.timer.min_se < 90) {
+		ast_log(LOG_ERROR, "Session timer minimum expires time must be 90 or greater on endpoint '%s'\n",
+			ast_sorcery_object_get_id(endpoint));
+		return -1;
+	} else if (endpoint->extensions.timer.sess_expires < endpoint->extensions.timer.min_se) {
+		ast_log(LOG_ERROR, "Session timer expires must be greater than minimum session expires time on endpoint '%s'\n",
+			ast_sorcery_object_get_id(endpoint));
+		return -1;
 	}
 
 	return 0;