Commit 59fbb3a6 authored by Masahide NAKAMURA's avatar Masahide NAKAMURA Committed by David S. Miller
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[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: default avatarMasahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 136ebf08

include/linux/ipv6.h

+1 −1
Original line number Diff line number Diff line
@@ -247,7 +247,7 @@ struct inet6_skb_parm { 
	__u16			lastopt;

	__u32			nhoff;

	__u16			flags;

#ifdef CONFIG_IPV6_MIP6

#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)

	__u16			dsthao;

#endif

include/net/addrconf.h

+1 −1
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ extern int addrconf_set_dstaddr(void __user *arg); 
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,

include/net/mip6.h

+0 −4
Original line number Diff line number Diff line
@@ -54,8 +54,4 @@ struct ip6_mh { 
#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

include/net/rawv6.h

+9 −0
Original line number Diff line number Diff line
@@ -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 @@ extern void rawv6_err(struct sock *sk, 
					  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

net/ipv6/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -109,7 +109,7 @@ config INET6_IPCOMP 
	  If unsure, say Y.



config IPV6_MIP6

	bool "IPv6: Mobility (EXPERIMENTAL)"

	tristate "IPv6: Mobility (EXPERIMENTAL)"

	depends on IPV6 && EXPERIMENTAL

	select XFRM

	---help---

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