commit b71d1d426d263b0b6cb5760322efebbfc89d4463
author Eric Dumazet <eric.dumazet@gmail.com> Fri Apr 22 04:53:02 2011 +0000
committer David S. Miller <davem@davemloft.net> Fri Apr 22 11:04:14 2011 -0700
tree 226ca7390bd6187ec9139d2ccedd26fd94d8e57a
parent 5f8629c526b4f7e529a6d27bbd802c0dc7fcc357

inet: constify ip headers and in6_addr

Add const qualifiers to structs iphdr, ipv6hdr and in6_addr pointers
where possible, to make code intention more obvious.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/raw.c

diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 2b50cc2..abf14db 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -154,7 +154,7 @@
  * RFC 1122: SHOULD pass TOS value up to the transport layer.
  * -> It does. And not only TOS, but all IP header.
  */
-static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
+static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash)
 {
 	struct sock *sk;
 	struct hlist_head *head;
@@ -247,7 +247,7 @@
 	}
 
 	if (inet->recverr) {
-		struct iphdr *iph = (struct iphdr *)skb->data;
+		const struct iphdr *iph = (const struct iphdr *)skb->data;
 		u8 *payload = skb->data + (iph->ihl << 2);
 
 		if (inet->hdrincl)
@@ -265,7 +265,7 @@
 {
 	int hash;
 	struct sock *raw_sk;
-	struct iphdr *iph;
+	const struct iphdr *iph;
 	struct net *net;
 
 	hash = protocol & (RAW_HTABLE_SIZE - 1);
@@ -273,7 +273,7 @@
 	read_lock(&raw_v4_hashinfo.lock);
 	raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]);
 	if (raw_sk != NULL) {
-		iph = (struct iphdr *)skb->data;
+		iph = (const struct iphdr *)skb->data;
 		net = dev_net(skb->dev);
 
 		while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol,
@@ -281,7 +281,7 @@
 						skb->dev->ifindex)) != NULL) {
 			raw_err(raw_sk, skb, info);
 			raw_sk = sk_next(raw_sk);
-			iph = (struct iphdr *)skb->data;
+			iph = (const struct iphdr *)skb->data;
 		}
 	}
 	read_unlock(&raw_v4_hashinfo.lock);