chan_sip: Fix lastrtprx always updated

Packets are read regulary, when there is no data in buffer fr->frametype
is AST_FRAME_NULL. There was no check of frametype and lastrtprx always
updated and, therefore, rtptimeout did not work at all.

ASTERISK-25270 #close

Change-Id: If3b5ca0dbb822582a86eb7d01dcae4e83448c41d

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 77f438262608435330f201c556b62ba5dafe95a3..8f3296adfa7ef1779614c03d87b084b1df07cabd 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -8598,7 +8598,9 @@ static struct ast_frame *sip_read(struct ast_channel *ast)
 
        sip_pvt_lock(p);
        fr = sip_rtp_read(ast, p, &faxdetected);
-       p->lastrtprx = time(NULL);
+       if (fr && fr->frametype != AST_FRAME_NULL) {
+               p->lastrtprx = time(NULL);
+       }
 
        /* If we detect a CNG tone and fax detection is enabled then send us off to the fax extension */
        if (faxdetected && ast_test_flag(&p->flags[1], SIP_PAGE2_FAX_DETECT_CNG)) {