[XFRM] STATE: Search by address using source address list.

This is a support to search transformation states by its addresses
by using source address list for Mobile IPv6 usage.
To use it from user-space, it is also added a message type for
source address as a xfrm state option.
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>

2 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 5154064b6d95..66343d3d4b91 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -234,6 +234,7 @@ enum xfrm_attr_type_t {
         XFRMA_REPLAY_VAL,
         XFRMA_REPLAY_THRESH,
         XFRMA_ETIMER_THRESH,
+        XFRMA_SRCADDR,          /* xfrm_address_t */
         __XFRMA_MAX
 
 #define XFRMA_MAX (__XFRMA_MAX - 1)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 88145e3348d0..d9c40e713184 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -244,6 +244,7 @@ struct xfrm_state_afinfo {
                                                 struct xfrm_tmpl *tmpl,
                                                 xfrm_address_t *daddr, xfrm_address_t *saddr);
         struct xfrm_state       *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto);
+        struct xfrm_state       *(*state_lookup_byaddr)(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto);
         struct xfrm_state       *(*find_acq)(u8 mode, u32 reqid, u8 proto, 
                                              xfrm_address_t *daddr, xfrm_address_t *saddr, 
                                              int create);
@@ -937,6 +938,7 @@ extern void xfrm_state_insert(struct xfrm_state *x);
 extern int xfrm_state_add(struct xfrm_state *x);
 extern int xfrm_state_update(struct xfrm_state *x);
 extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family);
+extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family);
 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
 extern int xfrm_state_delete(struct xfrm_state *x);
 extern void xfrm_state_flush(u8 proto);