diff options
| author | Patrick McHardy <kaber@trash.net> | 2006-04-06 14:18:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-04-09 22:25:41 -0700 |
| commit | 422c346fad806e2abaeffac686860ebc98dfe33e (patch) | |
| tree | dd554d11e80ad33afef4b438ec4c2d8943ad37f4 /include/linux/netfilter.h | |
| parent | bce8032ef3cc58170ab3550e9e271dba7b4c4764 (diff) | |
[NETFILTER]: Add address family specific checksum helpers
Add checksum operation which takes care of verifying the checksum and
dealing with HW checksum errors and avoids multiple checksum
operations by setting ip_summed to CHECKSUM_UNNECESSARY after
successful verification.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netfilter.h')
| -rw-r--r-- | include/linux/netfilter.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h index 6ee168c4978..b31a9bca936 100644 --- a/include/linux/netfilter.h +++ b/include/linux/netfilter.h @@ -285,6 +285,8 @@ extern int skb_make_writable(struct sk_buff **pskb, unsigned int writable_len); struct nf_afinfo { unsigned short family; + unsigned int (*checksum)(struct sk_buff *skb, unsigned int hook, + unsigned int dataoff, u_int8_t protocol); void (*saveroute)(const struct sk_buff *skb, struct nf_info *info); int (*reroute)(struct sk_buff **skb, @@ -298,6 +300,21 @@ static inline struct nf_afinfo *nf_get_afinfo(unsigned short family) return rcu_dereference(nf_afinfo[family]); } +static inline unsigned int +nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff, + u_int8_t protocol, unsigned short family) +{ + struct nf_afinfo *afinfo; + unsigned int csum = 0; + + rcu_read_lock(); + afinfo = nf_get_afinfo(family); + if (afinfo) + csum = afinfo->checksum(skb, hook, dataoff, protocol); + rcu_read_unlock(); + return csum; +} + extern int nf_register_afinfo(struct nf_afinfo *afinfo); extern void nf_unregister_afinfo(struct nf_afinfo *afinfo); |