/* Calculate the SCTP checksum of an SCTP packet. */
static inline int sctp_rcv_checksum(struct sk_buff *skb)
{
- struct sk_buff *list = skb_shinfo(skb)->frag_list;
struct sctphdr *sh = sctp_hdr(skb);
- __be32 cmp = sh->checksum;
- __be32 val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
+ __le32 cmp = sh->checksum;
+ struct sk_buff *list;
+ __le32 val;
+ __u32 tmp = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
- for (; list; list = list->next)
- val = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
- val);
+ skb_walk_frags(skb, list)
+ tmp = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
+ tmp);
- val = sctp_end_cksum(val);
+ val = sctp_end_cksum(tmp);
if (val != cmp) {
/* CRC failure, dump it. */
__skb_pull(skb, skb_transport_offset(skb));
if (skb->len < sizeof(struct sctphdr))
goto discard_it;
- if (!skb_csum_unnecessary(skb) && sctp_rcv_checksum(skb) < 0)
+ if (!sctp_checksum_disable && !skb_csum_unnecessary(skb) &&
+ sctp_rcv_checksum(skb) < 0)
goto discard_it;
skb_pull(skb, sizeof(struct sctphdr));