In upstream linux kernel networking stack udp_set_csum() is called
with only udp header applied but in case of compat layer it can
be called with IP header. So following patch take the offset into
account.
Signed-off-by: Pravin B Shelar <pshe...@ovn.org>
---
datapath/linux/compat/udp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/datapath/linux/compat/udp.c b/datapath/linux/compat/udp.c
index f0362b6..0152830 100644
--- a/datapath/linux/compat/udp.c
+++ b/datapath/linux/compat/udp.c
@@ -26,12 +26,13 @@ void rpl_udp_set_csum(bool nocheck, struct sk_buff *skb,
skb->csum_offset = offsetof(struct udphdr, check);
uh->check = ~udp_v4_check(len, saddr, daddr, 0);
} else {
+ int l4_offset = skb_transport_offset(skb);
__wsum csum;
BUG_ON(skb->ip_summed == CHECKSUM_PARTIAL);
uh->check = 0;
- csum = skb_checksum(skb, 0, len, 0);
+ csum = skb_checksum(skb, l4_offset, len, 0);
uh->check = udp_v4_check(len, saddr, daddr, csum);
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
--
1.9.1
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