static bool ecn_mt(const struct sk_buff *skb, const struct xt_match_param *par)
{
const struct ipt_ecn_info *info = par->matchinfo;
if (info->operation & IPT_ECN_OP_MATCH_IP)
if (!match_ip(skb, info))
return false;
if (info->operation & (IPT_ECN_OP_MATCH_ECE|IPT_ECN_OP_MATCH_CWR)) {
if (ip_hdr(skb)->protocol != IPPROTO_TCP)
return false;
if (!match_tcp(skb, info, par->hotdrop))
return false;
}
return true;
}
static int match(const struct sk_buff *skb,
const struct net_device *in, const struct net_device *out,
const struct xt_match *match, const void *matchinfo,
int offset, unsigned int protoff, int *hotdrop)
{
const struct ipt_ecn_info *info = matchinfo;
if (info->operation & IPT_ECN_OP_MATCH_IP)
if (!match_ip(skb, info))
return 0;
if (info->operation & (IPT_ECN_OP_MATCH_ECE|IPT_ECN_OP_MATCH_CWR)) {
if (skb->nh.iph->protocol != IPPROTO_TCP)
return 0;
if (!match_tcp(skb, info, hotdrop))
return 0;
}
return 1;
}