rem: if ( tag_str->len==TOTAG_LEN )
add: if ( tag_str->len==TOTAG_VALUE_LEN )
context: int sl_filter_ACK(struct sip_msg *msg, void *bar ){	str *tag_str;	if (msg->first_line.u.request.method_value!=METHOD_ACK)		goto pass_it;	/*check the timeout value*/	if ( *(sl_timeout)<= get_ticks() )	{		DBG("DEBUG : sl_filter_ACK: to late to be a local ACK!\n");		goto pass_it;	}	/*force to parse to header -> we need it for tag param*/	if (parse_headers( msg, HDR_TO, 0 )==-1)	{		LOG(L_ERR,"ERROR : SL_FILTER_ACK: unable to parse To header\n");		return -1;	}	if (msg->to) {		tag_str = &(get_to(msg)->tag_value);		if ( tag_str->len==TOTAG_LEN )		{			/* calculate the variable part of to-tag */				calc_crc_suffix(msg, tag_suffix);			/* test whether to-tag equal now */			if (memcmp(tag_str->s,sl_tag,TOTAG_LEN)==0) {				DBG("DEBUG: sl_filter_ACK : local ACK found -> dropping it! \n" );				return 0;			}		}	}pass_it:	return 1;}