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>
diff --git a/net/core/dev.c b/net/core/dev.c
index 3871bf6..379c993 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2502,8 +2502,8 @@
__u32 __skb_get_rxhash(struct sk_buff *skb)
{
int nhoff, hash = 0, poff;
- struct ipv6hdr *ip6;
- struct iphdr *ip;
+ const struct ipv6hdr *ip6;
+ const struct iphdr *ip;
u8 ip_proto;
u32 addr1, addr2, ihl;
union {
@@ -2518,7 +2518,7 @@
if (!pskb_may_pull(skb, sizeof(*ip) + nhoff))
goto done;
- ip = (struct iphdr *) (skb->data + nhoff);
+ ip = (const struct iphdr *) (skb->data + nhoff);
if (ip->frag_off & htons(IP_MF | IP_OFFSET))
ip_proto = 0;
else
@@ -2531,7 +2531,7 @@
if (!pskb_may_pull(skb, sizeof(*ip6) + nhoff))
goto done;
- ip6 = (struct ipv6hdr *) (skb->data + nhoff);
+ ip6 = (const struct ipv6hdr *) (skb->data + nhoff);
ip_proto = ip6->nexthdr;
addr1 = (__force u32) ip6->saddr.s6_addr32[3];
addr2 = (__force u32) ip6->daddr.s6_addr32[3];