static int checksum_udp(struct sk_buff *skb, struct udphdr *uh,
unsigned short ulen, u32 saddr, u32 daddr)
{
- if (uh->check == 0)
+ unsigned int psum;
+
+ if (uh->check == 0 || skb->ip_summed == CHECKSUM_UNNECESSARY)
return 0;
- if (skb->ip_summed == CHECKSUM_HW)
- return csum_tcpudp_magic(
- saddr, daddr, ulen, IPPROTO_UDP, skb->csum);
+ psum = csum_tcpudp_nofold(saddr, daddr, ulen, IPPROTO_UDP, 0);
+
+ if (skb->ip_summed == CHECKSUM_HW &&
+ !(u16)csum_fold(csum_add(psum, skb->csum)))
+ return 0;
- skb->csum = csum_tcpudp_nofold(saddr, daddr, ulen, IPPROTO_UDP, 0);
+ skb->csum = psum;
- return csum_fold(skb_checksum(skb, 0, skb->len, skb->csum));
+ return __skb_checksum_complete(skb);
}
/*
if (ulen != len)
goto out;
- if (checksum_udp(skb, uh, ulen, iph->saddr, iph->daddr) < 0)
+ if (checksum_udp(skb, uh, ulen, iph->saddr, iph->daddr))
goto out;
if (np->local_ip && np->local_ip != ntohl(iph->daddr))
goto out;
if (!np->local_ip) {
rcu_read_lock();
- in_dev = __in_dev_get(ndev);
+ in_dev = __in_dev_get_rcu(ndev);
if (!in_dev || !in_dev->ifa_list) {
rcu_read_unlock();