static void sctp_nat_csum(struct sk_buff *skb, sctp_sctphdr_t *sctph,
unsigned int sctphoff)
{
- __u32 crc32;
- struct sk_buff *iter;
-
- crc32 = sctp_start_cksum((__u8 *)sctph, skb_headlen(skb) - sctphoff);
- skb_walk_frags(skb, iter)
- crc32 = sctp_update_cksum((u8 *) iter->data,
- skb_headlen(iter), crc32);
- sctph->checksum = sctp_end_cksum(crc32);
-
+ sctph->checksum = sctp_compute_cksum(skb, sctphoff);
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
{
unsigned int sctphoff;
struct sctphdr *sh, _sctph;
- struct sk_buff *iter;
- __le32 cmp;
- __le32 val;
- __u32 tmp;
+ __le32 cmp, val;
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6)
return 0;
cmp = sh->checksum;
-
- tmp = sctp_start_cksum((__u8 *) sh, skb_headlen(skb));
- skb_walk_frags(skb, iter)
- tmp = sctp_update_cksum((__u8 *) iter->data,
- skb_headlen(iter), tmp);
-
- val = sctp_end_cksum(tmp);
+ val = sctp_compute_cksum(skb, sctphoff);
if (val != cmp) {
/* CRC failure, dump it. */