diff options
Diffstat (limited to 'net/ipv4/netfilter/ipt_ECN.c')
| -rw-r--r-- | net/ipv4/netfilter/ipt_ECN.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c index 4ec43f98fe492..35916c74fe4eb 100644 --- a/net/ipv4/netfilter/ipt_ECN.c +++ b/net/ipv4/netfilter/ipt_ECN.c @@ -52,7 +52,7 @@ static inline int set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo) { struct tcphdr _tcph, *tcph; - u_int16_t diffs[2]; + u_int16_t oldval; /* Not enought header? */ tcph = skb_header_pointer(*pskb, (*pskb)->nh.iph->ihl*4, @@ -70,23 +70,16 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo) return 0; tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4; - if (((*pskb)->ip_summed == CHECKSUM_PARTIAL || - (*pskb)->ip_summed == CHECKSUM_COMPLETE) && - skb_checksum_help(*pskb)) - return 0; - - diffs[0] = ((u_int16_t *)tcph)[6]; + oldval = ((u_int16_t *)tcph)[6]; if (einfo->operation & IPT_ECN_OP_SET_ECE) tcph->ece = einfo->proto.tcp.ece; if (einfo->operation & IPT_ECN_OP_SET_CWR) tcph->cwr = einfo->proto.tcp.cwr; - diffs[1] = ((u_int16_t *)tcph)[6]; - diffs[0] = diffs[0] ^ 0xFFFF; - if ((*pskb)->ip_summed != CHECKSUM_UNNECESSARY) - tcph->check = csum_fold(csum_partial((char *)diffs, - sizeof(diffs), - tcph->check^0xFFFF)); + tcph->check = nf_proto_csum_update((*pskb), + oldval ^ 0xFFFF, + ((u_int16_t *)tcph)[6], + tcph->check, 0); return 1; } |