app_dial.c: Make 'A' option pass COLP updates.

While the 'A' option is playing the announcement file allow the caller and
peer to exchange COLP update frames.

ASTERISK-25423
Reported by: John Hardin

Change-Id: Iac6cf89b56d26452c6bb88e9363622bbf23895f9

apps/app_dial.c

@@ -2748,7 +2748,9 @@ static int dial_exec_full(struct ast_channel *chan, const char *data, struct ast
 
 				active_chan = ast_waitfor_n(chans, 2, &ms);
 				if (active_chan) {
+					struct ast_channel *other_chan;
 					struct ast_frame *fr = ast_read(active_chan);
+
 					if (!fr) {
 						ast_autoservice_chan_hangup_peer(chan, peer);
 						res = -1;
@@ -2769,6 +2771,20 @@ static int dial_exec_full(struct ast_channel *chan, const char *data, struct ast
 							ast_autoservice_chan_hangup_peer(chan, peer);
 							res = -1;
 							goto done;
+						case AST_CONTROL_CONNECTED_LINE:
+							/* Pass COLP update to the other channel. */
+							if (active_chan == chan) {
+								other_chan = peer;
+							} else {
+								other_chan = chan;
+							}
+							if (ast_channel_connected_line_sub(active_chan, other_chan, fr, 1)
+								&& ast_channel_connected_line_macro(active_chan,
+									other_chan, fr, other_chan == chan, 1)) {
+								ast_indicate_data(other_chan, fr->subclass.integer,
+									fr->data.ptr, fr->datalen);
+							}
+							break;
 						default:
 							break;
 						}