[IPV6] MIP6: Loadable module support for MIPv6.
This patch makes MIPv6 loadable module named "mip6".
Here is a modprobe.conf(5) example to load it automatically
when user application uses XFRM state for MIPv6:
alias xfrm-type-10-43 mip6
alias xfrm-type-10-60 mip6
Some MIPv6 feature is not included by this modular, however,
it should not be affected to other features like either IPsec
or IPv6 with and without the patch.
We may discuss XFRM, MH (RAW socket) and ancillary data/sockopt
separately for future work.
Loadable features:
* MH receiving check (to send ICMP error back)
* RO header parsing and building (i.e. RH2 and HAO in DSTOPTS)
* XFRM policy/state database handling for RO
These are NOT covered as loadable:
* Home Address flags and its rule on source address selection
* XFRM sub policy (depends on its own kernel option)
* XFRM functions to receive RO as IPv6 extension header
* MH sending/receiving through raw socket if user application
opens it (since raw socket allows to do so)
* RH2 sending as ancillary data
* RH2 operation with setsockopt(2)
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 648bd1f..213b63be 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -247,7 +247,7 @@
__u16 lastopt;
__u32 nhoff;
__u16 flags;
-#ifdef CONFIG_IPV6_MIP6
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
__u16 dsthao;
#endif
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index f3531d0..33b593e 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -61,7 +61,7 @@
extern int ipv6_chk_addr(struct in6_addr *addr,
struct net_device *dev,
int strict);
-#ifdef CONFIG_IPV6_MIP6
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
extern int ipv6_chk_home_addr(struct in6_addr *addr);
#endif
extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
diff --git a/include/net/mip6.h b/include/net/mip6.h
index 68263c6..6327261 100644
--- a/include/net/mip6.h
+++ b/include/net/mip6.h
@@ -54,8 +54,4 @@
#define IP6_MH_TYPE_BERROR 7 /* Binding Error */
#define IP6_MH_TYPE_MAX IP6_MH_TYPE_BERROR
-extern int mip6_init(void);
-extern void mip6_fini(void);
-extern int mip6_mh_filter(struct sock *sk, struct sk_buff *skb);
-
#endif
diff --git a/include/net/rawv6.h b/include/net/rawv6.h
index af89608..a581989 100644
--- a/include/net/rawv6.h
+++ b/include/net/rawv6.h
@@ -3,6 +3,8 @@
#ifdef __KERNEL__
+#include <net/protocol.h>
+
#define RAWV6_HTABLE_SIZE MAX_INET_PROTOS
extern struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE];
extern rwlock_t raw_v6_lock;
@@ -23,6 +25,13 @@
int type, int code,
int offset, __be32 info);
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+int rawv6_mh_filter_register(int (*filter)(struct sock *sock,
+ struct sk_buff *skb));
+int rawv6_mh_filter_unregister(int (*filter)(struct sock *sock,
+ struct sk_buff *skb));
+#endif
+
#endif
#endif