[IPV6]: Make address arguments const.

- net/ipv6/addrconf.c:
	ipv6_get_ifaddr(), ipv6_dev_get_saddr()
- net/ipv6/mcast.c:
	ipv6_sock_mc_join(), ipv6_sock_mc_drop(),
	inet6_mc_check(),
	ipv6_dev_mc_inc(), __ipv6_dev_mc_dec(), ipv6_dev_mc_dec(),
	ipv6_chk_mcast_addr()
- net/ipv6/route.c:
	rt6_lookup(), icmp6_dst_alloc()
- net/ipv6/ip6_output.c:
	ip6_nd_hdr()
- net/ipv6/ndisc.c:
	ndisc_send_ns(), ndisc_send_rs(), ndisc_send_redirect(),
	ndisc_get_neigh(), __ndisc_send()

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

4 files changed, 27 insertions, 25 deletions

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 8317c1bcd86c..92af23d66eb9 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -76,12 +76,12 @@ extern int			ipv6_chk_prefix(struct in6_addr *addr,
                                                 struct net_device *dev);
 
 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
-                                                 struct in6_addr *addr,
+                                                 const struct in6_addr *addr,
                                                  struct net_device *dev,
                                                  int strict);
 
 extern int                      ipv6_dev_get_saddr(struct net_device *dev, 
-                                               struct in6_addr *daddr,
+                                               const struct in6_addr *daddr,
                                                unsigned int srcprefs,
                                                struct in6_addr *saddr);
 extern int                      ipv6_get_lladdr(struct net_device *dev,
@@ -105,25 +105,27 @@ extern u32			ipv6_addr_label(const struct in6_addr *addr,
 /*
  *      multicast prototypes (mcast.c)
  */
-extern int ipv6_sock_mc_join(struct sock *sk, int ifindex, 
-                  struct in6_addr *addr);
-extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex, 
-                  struct in6_addr *addr);
+extern int ipv6_sock_mc_join(struct sock *sk, int ifindex,
+                             const struct in6_addr *addr);
+extern int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
+                             const struct in6_addr *addr);
 extern void ipv6_sock_mc_close(struct sock *sk);
-extern int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
-                struct in6_addr *src_addr);
+extern int inet6_mc_check(struct sock *sk,
+                          const struct in6_addr *mc_addr,
+                          const struct in6_addr *src_addr);
 
-extern int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr);
-extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
-extern int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr);
+extern int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
+extern int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
+extern int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
 extern void ipv6_mc_up(struct inet6_dev *idev);
 extern void ipv6_mc_down(struct inet6_dev *idev);
 extern void ipv6_mc_init_dev(struct inet6_dev *idev);
 extern void ipv6_mc_destroy_dev(struct inet6_dev *idev);
 extern void addrconf_dad_failure(struct inet6_ifaddr *ifp);
 
-extern int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
-                struct in6_addr *src_addr);
+extern int ipv6_chk_mcast_addr(struct net_device *dev,
+                               const struct in6_addr *group,
+                               const struct in6_addr *src_addr);
 extern int ipv6_is_mld(struct sk_buff *skb, int nexthdr);
 
 extern void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len);
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 9080076ce0e5..9313491e3dad 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -61,13 +61,13 @@ extern int			ip6_ins_rt(struct rt6_info *);
 extern int                      ip6_del_rt(struct rt6_info *);
 
 extern struct rt6_info          *rt6_lookup(struct net *net,
-                                            struct in6_addr *daddr,
-                                            struct in6_addr *saddr,
+                                            const struct in6_addr *daddr,
+                                            const struct in6_addr *saddr,
                                             int oif, int flags);
 
 extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
                                          struct neighbour *neigh,
-                                         struct in6_addr *addr);
+                                         const struct in6_addr *addr);
 extern int icmp6_dst_gc(int *more);
 
 extern void fib6_force_start_gc(struct net *net);
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index a0c285b6311e..49c48983019f 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -451,8 +451,8 @@ extern int			ip6_xmit(struct sock *sk,
 extern int                      ip6_nd_hdr(struct sock *sk,
                                            struct sk_buff *skb,
                                            struct net_device *dev,
-                                           struct in6_addr *saddr,
-                                           struct in6_addr *daddr,
+                                           const struct in6_addr *saddr,
+                                           const struct in6_addr *daddr,
                                            int proto, int len);
 
 extern int                      ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 16424236fe2f..9c451ff2f4f4 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -94,17 +94,17 @@ extern int			ndisc_rcv(struct sk_buff *skb);
 
 extern void                     ndisc_send_ns(struct net_device *dev,
                                               struct neighbour *neigh,
-                                              struct in6_addr *solicit,
-                                              struct in6_addr *daddr,
-                                              struct in6_addr *saddr);
+                                              const struct in6_addr *solicit,
+                                              const struct in6_addr *daddr,
+                                              const struct in6_addr *saddr);
 
 extern void                     ndisc_send_rs(struct net_device *dev,
-                                              struct in6_addr *saddr,
-                                              struct in6_addr *daddr);
+                                              const struct in6_addr *saddr,
+                                              const struct in6_addr *daddr);
 
 extern void                     ndisc_send_redirect(struct sk_buff *skb,
                                                     struct neighbour *neigh,
-                                                    struct in6_addr *target);
+                                                    const struct in6_addr *target);
 
 extern int                      ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
 
@@ -134,7 +134,7 @@ extern int 			ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
 extern void                     inet6_ifinfo_notify(int event,
                                                     struct inet6_dev *idev);
 
-static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, struct in6_addr *addr)
+static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
 {
 
         if (dev)