Add a callback to sig_pri which is called when sig_pri is going to queue a control frame on a channel.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@224491 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/sig_pri.c

@@ -655,6 +655,10 @@ static void pri_queue_control(struct sig_pri_chan *p, int subclass, struct sig_p
 {
 	struct ast_frame f = {AST_FRAME_CONTROL, };
 
+	if (p->calls->queue_control) {
+		p->calls->queue_control(p->chan_pvt, subclass);
+	}
+
 	f.subclass = subclass;
 	pri_queue_frame(p, &f, pri);
 }

channels/sig_pri.h

@@ -75,6 +75,7 @@ struct sig_pri_callback {
 	void (* const set_callerid)(void *pvt, const struct ast_party_caller *caller);
 	void (* const set_dnid)(void *pvt, const char *dnid);
 	void (* const set_rdnis)(void *pvt, const char *rdnis);
+	void (* const queue_control)(void *pvt, int subclass);
 };
 
 #define NUM_DCHANS		4	/*!< No more than 4 d-channels */