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authorArnaldo Carvalho de Melo <acme@redhat.com>2007-04-10 20:50:43 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:24:59 -0700
commitd56f90a7c96da5187f0cdf07ee7434fe6aa78bbc (patch)
tree3b9073cecfbb3b6a1e25ab2b5dd2a22a43aef238 /include
parentbbe735e4247dba32568a305553b010081c8dea99 (diff)
[SK_BUFF]: Introduce skb_network_header()
For the places where we need a pointer to the network header, it is still legal to touch skb->nh.raw directly if just adding to, subtracting from or setting it to another layer header. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/if_pppox.h2
-rw-r--r--include/linux/skbuff.h5
-rw-r--r--include/net/cipso_ipv4.h2
-rw-r--r--include/net/inet_ecn.h6
-rw-r--r--include/net/llc_pdu.h4
-rw-r--r--include/net/pkt_cls.h2
6 files changed, 14 insertions, 7 deletions
diff --git a/include/linux/if_pppox.h b/include/linux/if_pppox.h
index 7044f8ab30a..29d6579ff1a 100644
--- a/include/linux/if_pppox.h
+++ b/include/linux/if_pppox.h
@@ -116,7 +116,7 @@ struct pppoe_hdr {
static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
{
- return (struct pppoe_hdr *)skb->nh.raw;
+ return (struct pppoe_hdr *)skb_network_header(skb);
}
struct pppoe_opt {
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 47cc8b07c2b..76d30f34b98 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -960,6 +960,11 @@ static inline void skb_reserve(struct sk_buff *skb, int len)
skb->tail += len;
}
+static inline unsigned char *skb_network_header(const struct sk_buff *skb)
+{
+ return skb->nh.raw;
+}
+
static inline void skb_reset_network_header(struct sk_buff *skb)
{
skb->nh.raw = skb->data;
diff --git a/include/net/cipso_ipv4.h b/include/net/cipso_ipv4.h
index 4c9522c5178..4f90f5554fa 100644
--- a/include/net/cipso_ipv4.h
+++ b/include/net/cipso_ipv4.h
@@ -120,7 +120,7 @@ extern int cipso_v4_rbm_strictvalid;
*/
#define CIPSO_V4_OPTEXIST(x) (IPCB(x)->opt.cipso != 0)
-#define CIPSO_V4_OPTPTR(x) ((x)->nh.raw + IPCB(x)->opt.cipso)
+#define CIPSO_V4_OPTPTR(x) (skb_network_header(x) + IPCB(x)->opt.cipso)
/*
* DOI List Functions
diff --git a/include/net/inet_ecn.h b/include/net/inet_ecn.h
index 10117c8503e..b9ed3898e36 100644
--- a/include/net/inet_ecn.h
+++ b/include/net/inet_ecn.h
@@ -114,12 +114,14 @@ static inline int INET_ECN_set_ce(struct sk_buff *skb)
{
switch (skb->protocol) {
case __constant_htons(ETH_P_IP):
- if (skb->nh.raw + sizeof(struct iphdr) <= skb->tail)
+ if (skb_network_header(skb) + sizeof(struct iphdr) <=
+ skb->tail)
return IP_ECN_set_ce(skb->nh.iph);
break;
case __constant_htons(ETH_P_IPV6):
- if (skb->nh.raw + sizeof(struct ipv6hdr) <= skb->tail)
+ if (skb_network_header(skb) + sizeof(struct ipv6hdr) <=
+ skb->tail)
return IP6_ECN_set_ce(skb->nh.ipv6h);
break;
}
diff --git a/include/net/llc_pdu.h b/include/net/llc_pdu.h
index 778f75a40b4..4a8f58b17e4 100644
--- a/include/net/llc_pdu.h
+++ b/include/net/llc_pdu.h
@@ -203,7 +203,7 @@ struct llc_pdu_sn {
static inline struct llc_pdu_sn *llc_pdu_sn_hdr(struct sk_buff *skb)
{
- return (struct llc_pdu_sn *)skb->nh.raw;
+ return (struct llc_pdu_sn *)skb_network_header(skb);
}
/* Un-numbered PDU format (3 bytes in length) */
@@ -215,7 +215,7 @@ struct llc_pdu_un {
static inline struct llc_pdu_un *llc_pdu_un_hdr(struct sk_buff *skb)
{
- return (struct llc_pdu_un *)skb->nh.raw;
+ return (struct llc_pdu_un *)skb_network_header(skb);
}
/**
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 02647fe3d74..8a6b0e7bded 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -326,7 +326,7 @@ static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
case TCF_LAYER_LINK:
return skb->data;
case TCF_LAYER_NETWORK:
- return skb->nh.raw;
+ return skb_network_header(skb);
case TCF_LAYER_TRANSPORT:
return skb->h.raw;
}