netfilter: xtables: collapse conditions in xt_ecn

One simplification of an if clause.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jan Engelhardt 2011-06-09 22:16:50 +02:00 коммит произвёл Pablo Neira Ayuso
Родитель af0d29cd2a
Коммит 42c344a3bc
1 изменённых файлов: 6 добавлений и 9 удалений

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@ -37,9 +37,8 @@ static bool match_tcp(const struct sk_buff *skb, struct xt_action_param *par)
* be good citizens. * be good citizens.
*/ */
th = skb_header_pointer(skb, par->thoff, sizeof(_tcph), &_tcph); th = skb_header_pointer(skb, par->thoff, sizeof(_tcph), &_tcph);
if (th == NULL) { if (th == NULL)
return false; return false;
}
if (einfo->operation & XT_ECN_OP_MATCH_ECE) { if (einfo->operation & XT_ECN_OP_MATCH_ECE) {
if (einfo->invert & XT_ECN_OP_MATCH_ECE) { if (einfo->invert & XT_ECN_OP_MATCH_ECE) {
@ -75,14 +74,12 @@ static bool ecn_mt4(const struct sk_buff *skb, struct xt_action_param *par)
{ {
const struct xt_ecn_info *info = par->matchinfo; const struct xt_ecn_info *info = par->matchinfo;
if (info->operation & XT_ECN_OP_MATCH_IP) if (info->operation & XT_ECN_OP_MATCH_IP && !match_ip(skb, info))
if (!match_ip(skb, info)) return false;
return false;
if (info->operation & (XT_ECN_OP_MATCH_ECE | XT_ECN_OP_MATCH_CWR)) { if (info->operation & (XT_ECN_OP_MATCH_ECE | XT_ECN_OP_MATCH_CWR) &&
if (!match_tcp(skb, par)) !match_tcp(skb, par))
return false; return false;
}
return true; return true;
} }