diff options
| author | Patrick McHardy <kaber@trash.net> | 2010-09-21 21:17:33 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-22 13:13:33 -0700 |
| commit | d6120b8afacec587f5feb37781bc751bc5d68a10 (patch) | |
| tree | c4477c43bfb8cb87f65d3119fa59d8335deeb825 /net | |
| parent | 15cdeadaa5d76009e20c7792aed69f5a73808f97 (diff) | |
netfilter: nf_nat_snmp: fix checksum calculation (v4)
Fix checksum calculation in nf_nat_snmp_basic.
Based on patches by Clark Wang <wtweeker@163.com> and
Stephen Hemminger <shemminger@vyatta.com>.
https://bugzilla.kernel.org/show_bug.cgi?id=17622
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_snmp_basic.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c index 1679e2c0963d..ee5f419d0a56 100644 --- a/net/ipv4/netfilter/nf_nat_snmp_basic.c +++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c @@ -893,13 +893,15 @@ static void fast_csum(__sum16 *csum, unsigned char s[4]; if (offset & 1) { - s[0] = s[2] = 0; + s[0] = ~0; s[1] = ~*optr; + s[2] = 0; s[3] = *nptr; } else { - s[1] = s[3] = 0; s[0] = ~*optr; + s[1] = ~0; s[2] = *nptr; + s[3] = 0; } *csum = csum_fold(csum_partial(s, 4, ~csum_unfold(*csum))); |