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/sctp/input.c b/net/sctp/input.c
index 3a8eb79..741ed16 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -565,7 +565,7 @@
*/
void sctp_v4_err(struct sk_buff *skb, __u32 info)
{
- struct iphdr *iph = (struct iphdr *)skb->data;
+ const struct iphdr *iph = (const struct iphdr *)skb->data;
const int ihlen = iph->ihl * 4;
const int type = icmp_hdr(skb)->type;
const int code = icmp_hdr(skb)->code;
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 865ce7b..321f175 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -531,7 +531,7 @@
static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
{
int type;
- struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr;
+ const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr;
type = ipv6_addr_type(in6);
if (IPV6_ADDR_ANY == type)