static inline int
set_ect_ip(struct sk_buff **pskb, const struct ipt_ECN_info *einfo)
{
- if (((*pskb)->nh.iph->tos & IPT_ECN_IP_MASK)
- != (einfo->ip_ect & IPT_ECN_IP_MASK)) {
- u_int16_t diffs[2];
+ struct iphdr *iph = (*pskb)->nh.iph;
+ u_int16_t oldtos;
+ if ((iph->tos & IPT_ECN_IP_MASK) != (einfo->ip_ect & IPT_ECN_IP_MASK)) {
if (!skb_make_writable(pskb, sizeof(struct iphdr)))
return 0;
-
- diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF;
- (*pskb)->nh.iph->tos &= ~IPT_ECN_IP_MASK;
- (*pskb)->nh.iph->tos |= (einfo->ip_ect & IPT_ECN_IP_MASK);
- diffs[1] = htons((*pskb)->nh.iph->tos);
- (*pskb)->nh.iph->check
- = csum_fold(csum_partial((char *)diffs,
- sizeof(diffs),
- (*pskb)->nh.iph->check
- ^0xFFFF));
+ iph = (*pskb)->nh.iph;
+ oldtos = iph->tos;
+ iph->tos &= ~IPT_ECN_IP_MASK;
+ iph->tos |= (einfo->ip_ect & IPT_ECN_IP_MASK);
+ iph->check = nf_csum_update(htons(oldtos) ^ htons(0xFFFF),
+ htons(iph->tos), iph->check);
}
return 1;
}
set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo)
{
struct tcphdr _tcph, *tcph;
- u_int16_t oldval;
+ __be16 oldval;
/* Not enought header? */
tcph = skb_header_pointer(*pskb, (*pskb)->nh.iph->ihl*4,
return 0;
tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4;
- oldval = ((u_int16_t *)tcph)[6];
+ oldval = ((__be16 *)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;
tcph->check = nf_proto_csum_update((*pskb),
- oldval ^ 0xFFFF,
- ((u_int16_t *)tcph)[6],
+ oldval ^ htons(0xFFFF),
+ ((__be16 *)tcph)[6],
tcph->check, 0);
return 1;
}
const struct net_device *out,
unsigned int hooknum,
const struct xt_target *target,
- const void *targinfo,
- void *userinfo)
+ const void *targinfo)
{
const struct ipt_ECN_info *einfo = targinfo;
const void *e_void,
const struct xt_target *target,
void *targinfo,
- unsigned int targinfosize,
unsigned int hook_mask)
{
const struct ipt_ECN_info *einfo = (struct ipt_ECN_info *)targinfo;