-static inline int get_ports(const struct sk_buff *skb, int offset,
- u16 ports[2])
-{
- union {
- struct tcphdr th;
- struct udphdr uh;
- sctp_sctphdr_t sctph;
- } hdr_u, *ptr_u;
-
- /* Must not be a fragment. */
- if (offset)
- return 1;
-
- /* Must be big enough to read ports (both UDP and TCP have
- them at the start). */
- ptr_u = skb_header_pointer(skb, skb->nh.iph->ihl*4, 8, &hdr_u);
- if (!ptr_u)
- return 1;
-
- switch (skb->nh.iph->protocol) {
- case IPPROTO_TCP:
- ports[0] = ptr_u->th.source;
- ports[1] = ptr_u->th.dest;
- break;
- case IPPROTO_UDP:
- ports[0] = ptr_u->uh.source;
- ports[1] = ptr_u->uh.dest;
- break;
- case IPPROTO_SCTP:
- ports[0] = ptr_u->sctph.source;
- ports[1] = ptr_u->sctph.dest;
- break;
- default:
- /* all other protocols don't supprot per-port hash
- * buckets */
- ports[0] = ports[1] = 0;
- break;
- }
-
- return 0;
-}
-
-