Add diversion header to a 302 redirect response if we have diversion data

(closes issue ASTERISK-18143)
	patch by oej


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@336501 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -1323,6 +1323,7 @@ static struct sip_auth *find_realm_authentication(struct sip_auth_container *cre
 /*--- Misc functions */
 static void check_rtp_timeout(struct sip_pvt *dialog, time_t t);
 static int reload_config(enum channelreloadreason reason);
+static void add_diversion_header(struct sip_request *req, struct sip_pvt *pvt);
 static int expire_register(const void *data);
 static void *do_monitor(void *data);
 static int restart_monitor(void);
@@ -10142,6 +10143,11 @@ static int __transmit_response(struct sip_pvt *p, const char *msg, const struct
 		add_cc_call_info_to_response(p, &resp);
 	}
 
+	/* If we are sending a 302 Redirect we can add a diversion header if the redirect information is set */
+	if (!strncmp(msg, "302", 3)) {
+		add_diversion_header(&resp, p);
+	}
+
 	/* If we are cancelling an incoming invite for some reason, add information
 		about the reason why we are doing this in clear text */
 	if (p->method == SIP_INVITE && msg[0] != '1') {