MT#55283 support individual unsubscribe action

Change-Id: Id4ea984ce8109b6a962edb52d0e81532bbfbd701

daemon/call.c

@@ -4610,8 +4610,7 @@ int monologue_subscribe_answer(struct call_monologue *dst_ml, sdp_ng_flags *flag
 }
 
 /* called with call->master_lock held in W */
-__attribute__((nonnull(1, 2)))
-int monologue_unsubscribe(struct call_monologue *dst_ml, sdp_ng_flags *flags) {
+int monologue_unsubscribe(struct call_monologue *dst_ml, struct call_monologue *src_ml, sdp_ng_flags *flags) {
 	for (unsigned int i = 0; i < dst_ml->medias->len; i++)
 	{
 		struct call_media *media = dst_ml->medias->pdata[i];
@@ -4622,6 +4621,9 @@ int monologue_unsubscribe(struct call_monologue *dst_ml, sdp_ng_flags *flags) {
 
 		/* TODO: should we care about subscribers as well? */
 		IQUEUE_FOREACH_SAFE(&media->media_subscriptions, ms) {
+			if (src_ml && ms->monologue != src_ml)
+				continue;
+
 			struct call_media *src_media = ms->media;
 
 			__media_unconfirm(src_media, "media unsubscribe");
@@ -4632,7 +4634,8 @@ int monologue_unsubscribe(struct call_monologue *dst_ml, sdp_ng_flags *flags) {
 		update_init_subscribers(media, NULL, NULL, flags->opmode);
 	}
 
-	monologue_destroy(dst_ml);
+	if (!src_ml)
+		monologue_destroy(dst_ml);
 
 	return 0;
 }

daemon/call_interfaces.c

@@ -4381,11 +4381,19 @@ const char *call_unsubscribe_ng(ng_command_ctx_t *ctx) {
 		return "No to-tag in message";
 
 	// get destination monologue
-	struct call_monologue *dest_ml = call_get_or_create_monologue(call, &flags.to_tag);
+	struct call_monologue *dest_ml = call_get_monologue(call, &flags.to_tag);
 	if (!dest_ml)
 		return "To-tag not found";
 
-	int ret = monologue_unsubscribe(dest_ml, &flags);
+	// get optional source monologue
+	struct call_monologue *src_ml = NULL;
+	if (flags.directional && flags.from_tag.len) {
+		src_ml = call_get_monologue(call, &flags.from_tag);
+		if (!src_ml)
+			return "From-tag not found";
+	}
+
+	int ret = monologue_unsubscribe(dest_ml, src_ml, &flags);
 	if (ret)
 		return "Failed to unsubscribe";
 

include/call.h

@@ -898,8 +898,8 @@ int monologue_subscribe_request(const subscription_q *srms, struct call_monologu
 __attribute__((nonnull(1, 2, 3)))
 int monologue_subscribe_answer(struct call_monologue *dst, sdp_ng_flags *flags,
 		sdp_streams_q *streams);
-__attribute__((nonnull(1, 2)))
-int monologue_unsubscribe(struct call_monologue *dst, sdp_ng_flags *);
+__attribute__((nonnull(1, 3)))
+int monologue_unsubscribe(struct call_monologue *dst, struct call_monologue *src, sdp_ng_flags *);
 int monologue_inject_start(struct call_monologue *src, struct call_monologue *dst,
 		sdp_ng_flags *flags);
 int monologue_inject_stop(struct call_monologue *src, struct call_monologue *dst,