res_pjsip: Apply AOR outbound proxy to static contacts.

The outbound proxy for an AOR was not being applied to
any statically configured Contacts. This resulted in the
OPTIONS requests being sent to the wrong target.

This change sets the outbound proxy on statically configured
contacts once the AOR configuration is done being
applied.

ASTERISK-28965

Change-Id: Ia60f3e93ea63f819c5a46bc8b54be2e588dfa9e0

res/res_pjsip/location.c

@@ -1339,6 +1339,29 @@ static int contact_apply_handler(const struct ast_sorcery *sorcery, void *object
 	return status ? 0 : -1;
 }
 
+static int aor_apply_outbound_proxy(void *obj, void *arg, int flags)
+{
+	struct ast_sip_contact *contact = obj;
+	struct ast_sip_aor *aor = arg;
+
+	ast_string_field_set(contact, outbound_proxy, aor->outbound_proxy);
+
+	return 0;
+}
+
+static int aor_apply_handler(const struct ast_sorcery *sorcery, void *object)
+{
+	struct ast_sip_aor *aor = object;
+
+	if (!aor->permanent_contacts || ast_strlen_zero(aor->outbound_proxy)) {
+		return 0;
+	}
+
+	ao2_callback(aor->permanent_contacts, OBJ_NODATA | OBJ_MULTIPLE, aor_apply_outbound_proxy, aor);
+
+	return 0;
+}
+
 /*! \brief Initialize sorcery with location support */
 int ast_sip_initialize_sorcery_location(void)
 {
@@ -1355,7 +1378,7 @@ int ast_sip_initialize_sorcery_location(void)
 	ast_sorcery_apply_default(sorcery, "aor", "config", "pjsip.conf,criteria=type=aor");
 
 	if (ast_sorcery_object_register(sorcery, "contact", contact_alloc, NULL, contact_apply_handler) ||
-		ast_sorcery_object_register(sorcery, "aor", aor_alloc, NULL, NULL)) {
+		ast_sorcery_object_register(sorcery, "aor", aor_alloc, NULL, aor_apply_handler)) {
 		return -1;
 	}