From: pablo@netfilter.org
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 08/25] net: core: add function for incremental IPv6 pseudo header checksum updates
Date: Tue, 4 Sep 2012 01:53:55 +0200 [thread overview]
Message-ID: <1346716452-3080-9-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1346716452-3080-1-git-send-email-pablo@netfilter.org>
From: Patrick McHardy <kaber@trash.net>
Add inet_proto_csum_replace16 for incrementally updating IPv6 pseudo header
checksums for IPv6 NAT.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: David S. Miller <davem@davemloft.net>
---
include/net/checksum.h | 3 +++
net/core/utils.c | 20 ++++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/include/net/checksum.h b/include/net/checksum.h
index ba55d8b..600d1d7 100644
--- a/include/net/checksum.h
+++ b/include/net/checksum.h
@@ -109,6 +109,9 @@ static inline void csum_replace2(__sum16 *sum, __be16 from, __be16 to)
struct sk_buff;
extern void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
__be32 from, __be32 to, int pseudohdr);
+extern void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
+ const __be32 *from, const __be32 *to,
+ int pseudohdr);
static inline void inet_proto_csum_replace2(__sum16 *sum, struct sk_buff *skb,
__be16 from, __be16 to,
diff --git a/net/core/utils.c b/net/core/utils.c
index 39895a6..f5613d5 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -294,6 +294,26 @@ void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
}
EXPORT_SYMBOL(inet_proto_csum_replace4);
+void inet_proto_csum_replace16(__sum16 *sum, struct sk_buff *skb,
+ const __be32 *from, const __be32 *to,
+ int pseudohdr)
+{
+ __be32 diff[] = {
+ ~from[0], ~from[1], ~from[2], ~from[3],
+ to[0], to[1], to[2], to[3],
+ };
+ if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ *sum = csum_fold(csum_partial(diff, sizeof(diff),
+ ~csum_unfold(*sum)));
+ if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
+ skb->csum = ~csum_partial(diff, sizeof(diff),
+ ~skb->csum);
+ } else if (pseudohdr)
+ *sum = ~csum_fold(csum_partial(diff, sizeof(diff),
+ csum_unfold(*sum)));
+}
+EXPORT_SYMBOL(inet_proto_csum_replace16);
+
int mac_pton(const char *s, u8 *mac)
{
int i;
--
1.7.10.4
next prev parent reply other threads:[~2012-09-03 23:53 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-03 23:53 [PATCH 00/25] Netfilter updates for net-next pablo
2012-09-03 23:53 ` [PATCH 01/25] ipvs: IPv6 MTU checking cleanup and bugfix pablo
2012-09-03 23:53 ` [PATCH 02/25] netfilter: nf_conntrack_ipv6: improve fragmentation handling pablo
2012-09-03 23:53 ` [PATCH 03/25] netfilter: nf_conntrack_ipv6: fix tracking of ICMPv6 error messages containing fragments pablo
2012-09-03 23:53 ` [PATCH 04/25] netfilter: nf_conntrack: restrict NAT helper invocation to IPv4 pablo
2012-09-03 23:53 ` [PATCH 05/25] netfilter: nf_nat: add protoff argument to packet mangling functions pablo
2012-09-03 23:53 ` [PATCH 06/25] netfilter: add protocol independent NAT core pablo
2012-09-03 23:53 ` [PATCH 07/25] netfilter: ipv6: expand skb head in ip6_route_me_harder after oif change pablo
2012-09-03 23:53 ` pablo [this message]
2012-09-03 23:53 ` [PATCH 09/25] netfilter: ipv6: add IPv6 NAT support pablo
2012-09-03 23:53 ` [PATCH 10/25] netfilter: ip6tables: add MASQUERADE target pablo
2012-09-03 23:53 ` [PATCH 11/25] netfilter: ip6tables: add REDIRECT target pablo
2012-09-03 23:53 ` [PATCH 12/25] netfilter: ip6tables: add NETMAP target pablo
2012-09-03 23:54 ` [PATCH 13/25] netfilter: nf_nat: support IPv6 in FTP NAT helper pablo
2012-09-03 23:54 ` [PATCH 14/25] netfilter: nf_nat: support IPv6 in amanda " pablo
2012-09-03 23:54 ` [PATCH 15/25] netfilter: nf_nat: support IPv6 in SIP " pablo
2012-09-04 23:14 ` Eric W. Biederman
2012-09-03 23:54 ` [PATCH 16/25] netfilter: nf_nat: support IPv6 in IRC " pablo
2012-09-03 23:54 ` [PATCH 17/25] netfilter: nf_nat: support IPv6 in TFTP " pablo
2012-09-03 23:54 ` [PATCH 18/25] netfilter: ip6tables: add stateless IPv6-to-IPv6 Network Prefix Translation target pablo
2012-09-03 23:54 ` [PATCH 19/25] netfilter: xt_socket: fix compilation warnings with gcc 4.7 pablo
2012-09-03 23:54 ` [PATCH 20/25] netfilter: xt_CT: refactorize xt_ct_tg_check pablo
2012-09-03 23:54 ` [PATCH 21/25] netfilter: nf_conntrack: add nf_ct_timeout_lookup pablo
2012-09-03 23:54 ` [PATCH 22/25] netfilter: remove xt_NOTRACK pablo
2012-09-03 23:54 ` [PATCH 23/25] netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_iterate() pablo
2012-09-03 23:54 ` [PATCH 24/25] netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_queue() pablo
2012-09-03 23:54 ` [PATCH 25/25] netfilter: properly annotate ipv4_netfilter_{init,fini}() pablo
2012-09-04 0:39 ` [PATCH 00/25] Netfilter updates for net-next David Miller
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