MT#61372 add `SIP code` support to protocol

Change-Id: Id7982aadf090db18561c50aec127f42860ebb6a4

daemon/call_interfaces.c

@@ -1886,6 +1886,16 @@ void call_ng_main_flags(const ng_parser_t *parser, str *key, parser_arg value, h
 		case CSH_LOOKUP("set-label"):
 			out->set_label = s;
 			break;
+		case CSH_LOOKUP("sip-code"):
+		case CSH_LOOKUP("sip_code"):
+		case CSH_LOOKUP("SIP-code"):
+		case CSH_LOOKUP("SIP_code"):
+		case CSH_LOOKUP("sip-response-code"):
+		case CSH_LOOKUP("sip_response_code"):
+		case CSH_LOOKUP("SIP-response-code"):
+		case CSH_LOOKUP("SIP_response_code"):
+			out->code = parser->get_int_str(value, out->code);
+			break;
 		case CSH_LOOKUP("sip-message-type"):
 		case CSH_LOOKUP("sip_message_type"):
 		case CSH_LOOKUP("SIP-message-type"):

docs/ng_control_protocol.md

@@ -577,6 +577,11 @@ Optionally included keys are:
     Contains a string indicating whether the SIP message that triggered this
     signalling message was either a `SIP request` or a `SIP response`.
 
+* `SIP code`
+
+    Contains an integer corresponding to the SIP response code (e.g. 180 or
+    200) if this signalling message was triggered by a SIP response.
+
 * `via-branch`
 
 	The SIP `Via` branch as string. Used to additionally refine the matching logic between media streams

include/call_interfaces.h

@@ -16,6 +16,7 @@ struct sockaddr_in6;
 struct sdp_ng_flags {
 	enum call_opmode opmode;
 	enum message_type message_type;
+	unsigned int code;
 	str call_id;
 	str from_tag;
 	str_q from_tags;