Hi Yoshofuji, thanks for your patches! If I add a onces complement to the return value of csum_fold() it works for my setup. Cheers Ulrich On 01/26/13 19:37, YOSHIFUJI Hideaki wrote: > Cast __wsum from/to __sum16 is wrong. Instead, apply appropriate > conversion function: csum_unfold() or csum_fold(). > > Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx> > --- > net/ipv6/netfilter/ip6t_NPT.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/net/ipv6/netfilter/ip6t_NPT.c b/net/ipv6/netfilter/ip6t_NPT.c > index 7302b0b..3ff281b 100644 > --- a/net/ipv6/netfilter/ip6t_NPT.c > +++ b/net/ipv6/netfilter/ip6t_NPT.c > @@ -30,7 +30,7 @@ static int ip6t_npt_checkentry(const struct xt_tgchk_param *par) > (__force __wsum)npt->dst_pfx.in6.s6_addr16[i]); > } > > - npt->adjustment = (__force __sum16) csum_sub(src_sum, dst_sum); > + npt->adjustment = csum_fold(csum_sub(src_sum, dst_sum)); > return 0; > } > > @@ -66,8 +66,8 @@ static bool ip6t_npt_map_pfx(const struct ip6t_npt_tginfo *npt, > return false; > } > > - sum = (__force __sum16) csum_add((__force __wsum)addr->s6_addr16[idx], > - npt->adjustment); > + sum = csum_fold(csum_add(csum_unfold((__force __sum16)addr->s6_addr16[idx]), > + csum_unfold(npt->adjustment))); > if (sum == CSUM_MANGLED_0) > sum = 0; > *(__force __sum16 *)&addr->s6_addr16[idx] = sum;
>From 40e0c6d86514a8dcc80f18fbe8a2945c6ee78f6d Mon Sep 17 00:00:00 2001 From: Ulrich Weber <ulrich.weber@xxxxxxxxxx> Date: Tue, 29 Jan 2013 15:24:21 +0100 Subject: [PATCH] netfilter: ip6t_NTP: Use onces complement of csum_fold we need a 16bit value but not folded Signed-off-by: Ulrich Weber <ulrich.weber@xxxxxxxxxx> --- net/ipv6/netfilter/ip6t_NPT.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/ipv6/netfilter/ip6t_NPT.c b/net/ipv6/netfilter/ip6t_NPT.c index 74e171d..61a9b95 100644 --- a/net/ipv6/netfilter/ip6t_NPT.c +++ b/net/ipv6/netfilter/ip6t_NPT.c @@ -35,7 +35,7 @@ static int ip6t_npt_checkentry(const struct xt_tgchk_param *par) src_sum = csum_partial(&npt->src_pfx.in6, sizeof(npt->src_pfx.in6), 0); dst_sum = csum_partial(&npt->dst_pfx.in6, sizeof(npt->dst_pfx.in6), 0); - npt->adjustment = csum_fold(csum_sub(src_sum, dst_sum)); + npt->adjustment = ~csum_fold(csum_sub(src_sum, dst_sum)); return 0; } @@ -71,8 +71,8 @@ static bool ip6t_npt_map_pfx(const struct ip6t_npt_tginfo *npt, return false; } - sum = csum_fold(csum_add(csum_unfold((__force __sum16)addr->s6_addr16[idx]), - csum_unfold(npt->adjustment))); + sum = ~csum_fold(csum_add(csum_unfold((__force __sum16)addr->s6_addr16[idx]), + csum_unfold(npt->adjustment))); if (sum == CSUM_MANGLED_0) sum = 0; *(__force __sum16 *)&addr->s6_addr16[idx] = sum; -- 1.7.9.5
