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net: unify skb_udp_tunnel_segment() and skb_udp6_tunnel_segment()

Browse source 
As suggested by Pravin, we can unify the code in case of duplicated
code.

Cc: Pravin Shelar <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Cong Wang 2013-08-31 13:44:38 +08:00 • committed by David S. Miller
commit eb3c0d83cc
2 changed files with 13 additions and 56 deletions
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13
net/ipv4/udp.c
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@ -2337,7 +2337,7 @@ struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
uh->len = htons(skb->len - udp_offset);
/* csum segment if tunnel sets skb with csum. */
if (unlikely(uh->check)) {
if (protocol == htons(ETH_P_IP) && unlikely(uh->check)) {
struct iphdr *iph = ip_hdr(skb);
uh->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
@ -2348,7 +2348,18 @@ struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
} else if (protocol == htons(ETH_P_IPV6)) {
struct ipv6hdr *ipv6h = ipv6_hdr(skb);
u32 len = skb->len - udp_offset;
uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
len, IPPROTO_UDP, 0);
uh->check = csum_fold(skb_checksum(skb, udp_offset, len, 0));
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
skb->ip_summed = CHECKSUM_NONE;
}
skb->protocol = protocol;
} while ((skb = skb->next));
out: