set_bit(IPS_ASSURED_BIT, &conntrack->status); 
if (!test_and_set_bit(IPS_ASSURED_BIT, &conntrack->status)) ip_conntrack_event_cache(IPCT_STATUS, skb); 
static int udp_packet(struct ip_conntrack *conntrack,		      const struct sk_buff *skb,		      enum ip_conntrack_info ctinfo){	/* If we've seen traffic both ways, this is some kind of UDP	   stream.  Extend timeout. */	if (test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)) {		ip_ct_refresh_acct(conntrack, ctinfo, skb, 				   ip_ct_udp_timeout_stream);		/* Also, more likely to be important, and not a probe */		set_bit(IPS_ASSURED_BIT, &conntrack->status);	} else		ip_ct_refresh_acct(conntrack, ctinfo, skb, ip_ct_udp_timeout);	return NF_ACCEPT;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/ac3247baf8ecadf168642e3898b0212c29c79715/ip_conntrack_proto_udp.c/clean/net/ipv4/netfilter/ip_conntrack_proto_udp.c