qrouting: Improve PDD accuracy

In case a 200 OK arrives without any 180/183 beforehand, we must also
take care to bump up the PDD accordingly, since the user on the UAC side
did not hear any audio feedback until the call was answered!

modules/qrouting/qr_acc.c

@@ -237,8 +237,8 @@ void qr_check_reply_tmcb(struct cell *cell, int type, struct tmcb_params *ps)
 		lock_get(trans_prop->prop_lock);
 
 		/* compute the PDD _at most once_ */
-		if (!(trans_prop->state & QR_TM_100RCVD)) {
-			trans_prop->state |= QR_TM_100RCVD;
+		if (!(trans_prop->state & QR_TM_180_RCVD)) {
+			trans_prop->state |= QR_TM_180_RCVD;
 			lock_release(trans_prop->prop_lock);
 
 			if ((pdd_tm = get_elapsed_time(trans_prop->invite, 'm')) < 0) {
@@ -257,6 +257,18 @@ void qr_check_reply_tmcb(struct cell *cell, int type, struct tmcb_params *ps)
 				LM_ERR("negative setup time\n");
 				return;
 			}
+
+			/* if there was no 180/183, count PDD using the 200 OK! */
+			lock_get(trans_prop->prop_lock);
+			if (!(trans_prop->state & QR_TM_180_RCVD)) {
+				trans_prop->state |= QR_TM_180_RCVD;
+				lock_release(trans_prop->prop_lock);
+
+				qr_add_pdd(trans_prop->gw, pdd_tm);
+			} else {
+				lock_release(trans_prop->prop_lock);
+			}
+
 			qr_add_setup(trans_prop->gw, st);
 
 			qr_add_200OK(trans_prop->gw);

modules/qrouting/qr_acc.h

@@ -29,7 +29,7 @@
 #include "qr_stats.h"
 #include "../drouting/dr_api.h"
 
-#define QR_TM_100RCVD (1<<0)
+#define QR_TM_180_RCVD (1<<0)
 
 extern struct tm_binds tmb;
 extern struct dlg_binds dlgcb;