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>

1 files changed, 10 insertions, 10 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 15c37746845e..1bdc5f053db8 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -311,7 +311,7 @@ static struct sock *__udp6_lib_lookup_skb(struct sk_buff *skb,
                                           struct udp_table *udptable)
 {
         struct sock *sk;
-        struct ipv6hdr *iph = ipv6_hdr(skb);
+        const struct ipv6hdr *iph = ipv6_hdr(skb);
 
         if (unlikely(sk = skb_steal_sock(skb)))
                 return sk;
@@ -463,9 +463,9 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                     struct udp_table *udptable)
 {
         struct ipv6_pinfo *np;
-        struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
-        struct in6_addr *saddr = &hdr->saddr;
-        struct in6_addr *daddr = &hdr->daddr;
+        const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data;
+        const struct in6_addr *saddr = &hdr->saddr;
+        const struct in6_addr *daddr = &hdr->daddr;
         struct udphdr *uh = (struct udphdr*)(skb->data+offset);
         struct sock *sk;
         int err;
@@ -553,8 +553,8 @@ drop_no_sk_drops_inc:
 }
 
 static struct sock *udp_v6_mcast_next(struct net *net, struct sock *sk,
-                                      __be16 loc_port, struct in6_addr *loc_addr,
-                                      __be16 rmt_port, struct in6_addr *rmt_addr,
+                                      __be16 loc_port, const struct in6_addr *loc_addr,
+                                      __be16 rmt_port, const struct in6_addr *rmt_addr,
                                       int dif)
 {
         struct hlist_nulls_node *node;
@@ -633,7 +633,7 @@ drop:
  * so we don't need to lock the hashes.
  */
 static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
-                struct in6_addr *saddr, struct in6_addr *daddr,
+                const struct in6_addr *saddr, const struct in6_addr *daddr,
                 struct udp_table *udptable)
 {
         struct sock *sk, *stack[256 / sizeof(struct sock *)];
@@ -716,7 +716,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
         struct net *net = dev_net(skb->dev);
         struct sock *sk;
         struct udphdr *uh;
-        struct in6_addr *saddr, *daddr;
+        const struct in6_addr *saddr, *daddr;
         u32 ulen = 0;
 
         if (!pskb_may_pull(skb, sizeof(struct udphdr)))
@@ -1278,7 +1278,7 @@ int compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
 
 static int udp6_ufo_send_check(struct sk_buff *skb)
 {
-        struct ipv6hdr *ipv6h;
+        const struct ipv6hdr *ipv6h;
         struct udphdr *uh;
 
         if (!pskb_may_pull(skb, sizeof(*uh)))
@@ -1382,7 +1382,7 @@ static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket
 {
         struct inet_sock *inet = inet_sk(sp);
         struct ipv6_pinfo *np = inet6_sk(sp);
-        struct in6_addr *dest, *src;
+        const struct in6_addr *dest, *src;
         __u16 destp, srcp;
 
         dest  = &np->daddr;