Add a log message for when DTLS-SRTP is requested and the underlying engine does...

(closes issue ASTERISK-20487)
Reported by: mjordan

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@374755 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 3eb55946cf3425889da7cfe1f4a1d45c03fa17fd..4f7e151dda476bee6b562fc77e6996dd36a74422 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -5534,6 +5534,8 @@ static int dialog_initialize_dtls_srtp(const struct sip_pvt *dialog, struct ast_
        if (!(dtls = ast_rtp_instance_get_dtls(rtp)) ||
            dtls->set_configuration(rtp, &dialog->dtls_cfg) ||
            !(*srtp = sip_srtp_alloc())) {
+               ast_log(LOG_ERROR, "No DTLS-SRTP support present on engine for RTP instance '%p', was it compiled with support for it?\n",
+                       instance);
                return -1;
        }