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| author | Masahide NAKAMURA <nakam@linux-ipv6.org> | 2006-08-24 05:10:33 +0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-23 02:06:41 +0400 |
| commit | 99505a843673faeae962a8cde128c7c034ba6b5e (patch) | |
| tree | f12a7409b5981881e56fcf5ca973de0d5d6001bd | |
| parent | 9e51fd371a022318c5b64b831c43026e89bc4f75 (diff) | |
| download | linux-99505a843673faeae962a8cde128c7c034ba6b5e.tar.xz | |
[XFRM] STATE: Add a hook to obtain local/remote outbound address.
Outbound transformation replaces both source and destination address with
state's end-point addresses at the same time when IPsec tunnel mode.
It is also required to change them for Mobile IPv6 route optimization, but we
should care about the following differences:
- changing result is not end-point but care-of address
- either source or destination is replaced for each state
This hook is a common platform to change outbound address.
Based on MIPL2 kernel patch.
Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/xfrm.h | 2 | ||||
| -rw-r--r-- | net/ipv6/xfrm6_policy.c | 20 |
2 files changed, 20 insertions, 2 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 0d735a5aba61..aa3ac994477b 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -266,6 +266,8 @@ struct xfrm_type int (*input)(struct xfrm_state *, struct sk_buff *skb); int (*output)(struct xfrm_state *, struct sk_buff *pskb); int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); + xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); + xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); /* Estimate maximal size of result of transformation of a dgram */ u32 (*get_max_size)(struct xfrm_state *, int size); }; diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 81355bb50328..9328fc88708a 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -59,6 +59,22 @@ __xfrm6_find_bundle(struct flowi *fl, struct xfrm_policy *policy) return dst; } +static inline struct in6_addr* +__xfrm6_bundle_addr_remote(struct xfrm_state *x, struct in6_addr *addr) +{ + return (x->type->remote_addr) ? + (struct in6_addr*)x->type->remote_addr(x, (xfrm_address_t *)addr) : + (struct in6_addr*)&x->id.daddr; +} + +static inline struct in6_addr* +__xfrm6_bundle_addr_local(struct xfrm_state *x, struct in6_addr *addr) +{ + return (x->type->local_addr) ? + (struct in6_addr*)x->type->local_addr(x, (xfrm_address_t *)addr) : + (struct in6_addr*)&x->props.saddr; +} + /* Allocate chain of dst_entry's, attach known xfrm's, calculate * all the metrics... Shortly, bundle a bundle. */ @@ -115,8 +131,8 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int dst1->next = dst_prev; dst_prev = dst1; if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) { - remote = (struct in6_addr*)&xfrm[i]->id.daddr; - local = (struct in6_addr*)&xfrm[i]->props.saddr; + remote = __xfrm6_bundle_addr_remote(xfrm[i], remote); + local = __xfrm6_bundle_addr_local(xfrm[i], local); tunnel = 1; } header_len += xfrm[i]->props.header_len; |