ARI: Allow usage of ASYNCGOTO with Stasis()

When the AMI Redirect action is used with a channel bridged inside
Stasis() and not running a pbx, the channel is hung up instead of
proceeding to the desired location in dialplan. This change allows
such channels to be Redirected properly by detecting the operation
used by Redirect (ASYNCGOTO) and using the code already established
for functionality of the ARI channel continue operation.

ASTERISK-24591 #close
Review: https://reviewboard.asterisk.org/r/4271/
........

Merged revisions 430355 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@430356 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_stasis.c

@@ -1373,13 +1373,26 @@ int stasis_app_exec(struct ast_channel *chan, const char *app_name, int argc,
 	control_unlink(control);
 	control = NULL;
 
-	if (!ast_check_hangup_locked(chan) && !ast_channel_pbx(chan)) {
-		struct ast_pbx_args pbx_args;
+	if (!ast_channel_pbx(chan)) {
+		int chan_hungup;
 
-		memset(&pbx_args, 0, sizeof(pbx_args));
-		pbx_args.no_hangup_chan = 1;
+		/* The ASYNCGOTO softhangup flag may have broken the channel out of
+		 * its bridge to run dialplan, so if there's no pbx on the channel
+		 * let it run dialplan here. Otherwise, it will run when this
+		 * application exits. */
+		ast_channel_lock(chan);
+		ast_channel_clear_softhangup(chan, AST_SOFTHANGUP_ASYNCGOTO);
+		chan_hungup = ast_check_hangup(chan);
+		ast_channel_unlock(chan);
 
-		res = ast_pbx_run_args(chan, &pbx_args);
+		if (!chan_hungup) {
+			struct ast_pbx_args pbx_args;
+
+			memset(&pbx_args, 0, sizeof(pbx_args));
+			pbx_args.no_hangup_chan = 1;
+
+			res = ast_pbx_run_args(chan, &pbx_args);
+		}
 	}
 
 	return res;