- if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
- (iph->protocol == IPPROTO_TCP ||
- iph->protocol == IPPROTO_UDP ||
- iph->protocol == IPPROTO_UDPLITE ||
- iph->protocol == IPPROTO_SCTP ||
- iph->protocol == IPPROTO_DCCP ||
- iph->protocol == IPPROTO_ESP) &&
- pskb_network_may_pull(skb, iph->ihl * 4 + 4))
- h2 ^= *(((u32*)iph) + iph->ihl);
+ if (iph->frag_off & htons(IP_MF|IP_OFFSET))
+ break;
+ poff = proto_ports_offset(iph->protocol);
+ if (poff >= 0 &&
+ pskb_network_may_pull(skb, iph->ihl * 4 + 4 + poff)) {
+ iph = ip_hdr(skb);
+ h2 ^= *(u32*)((void *)iph + iph->ihl * 4 + poff);
+ }