Function restore_uri

modules/uac/replace.c:517–643

* return 0 - restored * -1 - not restored or error */

 *        -1 - not restored or error
 */
int restore_uri( struct sip_msg *msg, int to, int check_from)
{
	struct hdr_field *old_hdr;
	struct lump* l;
	str param_val;
	str old_uri, ou;
	str new_uri;
	str *rr_param;
	char *p;
	int i;
	int flag;

	/* we should process only sequntial request, but since we are looking
	 * for Route param, the test is not really required -bogdan */

	rr_param = to ? &rr_to_param : &rr_from_param;

	LM_DBG("getting '%.*s' Route param\n",
		rr_param->len,rr_param->s);
	/* is there something to restore ? */
	if (uac_rrb.get_route_param( msg, rr_param, &param_val)!=0) {
		LM_DBG("route param '%.*s' not found\n",
			rr_param->len,rr_param->s);
		goto failed;
	}
	LM_DBG("route param is '%.*s' (len=%d)\n",
		param_val.len,param_val.s,param_val.len);

	/* decode the parameter val to a URI */
	if (decode_uri( &param_val, &new_uri)<0 ) {
		LM_ERR("failed to decode uri\n");
		goto failed;
	}

	/* dencrypt parameter ;) */
	if (uac_passwd.len)
		for( i=0 ; i<new_uri.len ; i++)
			new_uri.s[i] ^= uac_passwd.s[i%uac_passwd.len];

	/* check the request direction */
	if ( (check_from && uac_rrb.is_direction( msg, RR_FLOW_UPSTREAM)==0) ||
	(!check_from && uac_rrb.is_direction( msg, RR_FLOW_DOWNSTREAM)==0)  ) {
		/* replace the TO URI */
		if ( msg->to==0 && (parse_headers(msg,HDR_TO_F,0)!=0 || msg->to==0) ) {
			LM_ERR("failed to parse TO hdr\n");
			goto failed;
		}
		ou = old_uri = ((struct to_body*)msg->to->parsed)->uri;
		old_hdr = msg->to;
		flag = FL_USE_UAC_TO;
	} else {
		/* replace the FROM URI */
		if ( parse_from_header(msg)<0 ) {
			LM_ERR("failed to find/parse FROM hdr\n");
			goto failed;
		}
		ou = old_uri = ((struct to_body*)msg->from->parsed)->uri;
		old_hdr = msg->from;