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[NETFILTER]: bridge netfilter: consolidate header pushing/pulling code

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Consolidate the common push/pull sequences into a few helper functions.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2007-05-03 03:36:16 -07:00
committed by David S. Miller
parent cfd6c38096
commit fc38582db9
2 changed files with 56 additions and 107 deletions
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include/linux/netfilter_bridge.h
+16 -9
View File
@@ -55,18 +55,25 @@ static inline int nf_bridge_maybe_copy_header(struct sk_buff *skb)
return 0;
}
static inline unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
{
switch (skb->protocol) {
case __constant_htons(ETH_P_8021Q):
return VLAN_HLEN;
case __constant_htons(ETH_P_PPP_SES):
return PPPOE_SES_HLEN;
default:
return 0;
}
}
/* This is called by the IP fragmenting code and it ensures there is
* enough room for the encapsulating header (if there is one). */
static inline int nf_bridge_pad(const struct sk_buff *skb)
static inline unsigned int nf_bridge_pad(const struct sk_buff *skb)
{
int padding = 0;
if (skb->nf_bridge && skb->protocol == htons(ETH_P_8021Q))
padding = VLAN_HLEN;
else if (skb->nf_bridge && skb->protocol == htons(ETH_P_PPP_SES))
padding = PPPOE_SES_HLEN;
return padding;
if (skb->nf_bridge)
return nf_bridge_encap_header_len(skb);
return 0;
}
struct bridge_skb_cb {