[NETFILTER]: bridge netfilter: consolidate header pushing/pulling code
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>
diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h
index 1906003..533ee35 100644
--- a/include/linux/netfilter_bridge.h
+++ b/include/linux/netfilter_bridge.h
@@ -55,18 +55,25 @@
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 {