[IPv6]: Only modify checksum for UDP

Only change upper-layer checksum from 0 to 0xFFFF for UDP (as RFC 768
states), not for others as RFC 4443 doesn't require it.

Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 18a90075f942..813fa1d96862 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -536,7 +536,7 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
                                    &fl->fl6_dst,
                                    total_len, fl->proto, tmp_csum);
 
-        if (tmp_csum == 0)
+        if (tmp_csum == 0 && fl->proto == IPPROTO_UDP)
                 tmp_csum = -1;
 
         csum = tmp_csum;