add sip_via_protocol variable and cleanup code

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@9923 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia.c

@@ -3519,6 +3519,10 @@ void sofia_handle_sip_i_invite(nua_t *nua, sofia_profile_t *profile, nua_handle_
 		switch_channel_set_variable(channel, "sip_received_port", tmp);
 	}
 
+	if (sip->sip_via) {
+		switch_channel_set_variable(channel, "sip_via_protocol", sofia_glue_transport2str(sofia_glue_via2transport(sip->sip_via)));
+	}
+
 	if (*key != '\0') {
 		tech_pvt->key = switch_core_session_strdup(session, key);
 	}

src/mod/endpoints/mod_sofia/sofia_glue.c

@@ -676,15 +676,10 @@ sofia_transport_t sofia_glue_url2transport(const url_t *url)
 sofia_transport_t sofia_glue_via2transport(const sip_via_t *via)
 {
 	char *ptr = NULL;
-	int tls = 0;
 
 	if (!via || !via->v_protocol)
 		return SOFIA_TRANSPORT_UNKNOWN;
 
-	if (!strncasecmp(via->v_protocol, "sips", 4)) {
-		tls++;
-	}
-
 	if ((ptr = strrchr(via->v_protocol, '/'))) {
 		ptr++;