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

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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>
This commit is contained in:
Masahide NAKAMURA
2006-08-23 17:56:04 -07:00
committed by David S. Miller
parent 6c44e6b7ab
commit eb2971b68a
6 changed files with 119 additions and 10 deletions
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37
net/xfrm/xfrm_state.c
View File

@@ -487,6 +487,16 @@ void xfrm_state_insert(struct xfrm_state *x)
}
EXPORT_SYMBOL(xfrm_state_insert);
static inline struct xfrm_state *
__xfrm_state_locate(struct xfrm_state_afinfo *afinfo, struct xfrm_state *x,
int use_spi)
{
if (use_spi)
return afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
else
return afinfo->state_lookup_byaddr(&x->id.daddr, &x->props.saddr, x->id.proto);
}
static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq);
int xfrm_state_add(struct xfrm_state *x)
@@ -495,6 +505,7 @@ int xfrm_state_add(struct xfrm_state *x)
struct xfrm_state *x1;
int family;
int err;
int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
family = x->props.family;
afinfo = xfrm_state_get_afinfo(family);
@@ -503,7 +514,7 @@ int xfrm_state_add(struct xfrm_state *x)
spin_lock_bh(&xfrm_state_lock);
x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
x1 = __xfrm_state_locate(afinfo, x, use_spi);
if (x1) {
xfrm_state_put(x1);
x1 = NULL;
@@ -511,7 +522,7 @@ int xfrm_state_add(struct xfrm_state *x)
goto out;
}
if (x->km.seq) {
if (use_spi && x->km.seq) {
x1 = __xfrm_find_acq_byseq(x->km.seq);
if (x1 && xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family)) {
xfrm_state_put(x1);
@@ -519,7 +530,7 @@ int xfrm_state_add(struct xfrm_state *x)
}
}
if (!x1)
if (use_spi && !x1)
x1 = afinfo->find_acq(
x->props.mode, x->props.reqid, x->id.proto,
&x->id.daddr, &x->props.saddr, 0);
@@ -548,13 +559,14 @@ int xfrm_state_update(struct xfrm_state *x)
struct xfrm_state_afinfo *afinfo;
struct xfrm_state *x1;
int err;
int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);
afinfo = xfrm_state_get_afinfo(x->props.family);
if (unlikely(afinfo == NULL))
return -EAFNOSUPPORT;
spin_lock_bh(&xfrm_state_lock);
x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
x1 = __xfrm_state_locate(afinfo, x, use_spi);
err = -ESRCH;
if (!x1)
@@ -674,6 +686,23 @@ xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto,
}
EXPORT_SYMBOL(xfrm_state_lookup);
struct xfrm_state *
xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr,
u8 proto, unsigned short family)
{
struct xfrm_state *x;
struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
if (!afinfo)
return NULL;
spin_lock_bh(&xfrm_state_lock);
x = afinfo->state_lookup_byaddr(daddr, saddr, proto);
spin_unlock_bh(&xfrm_state_lock);
xfrm_state_put_afinfo(afinfo);
return x;
}
EXPORT_SYMBOL(xfrm_state_lookup_byaddr);
struct xfrm_state *
xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
xfrm_address_t *daddr, xfrm_address_t *saddr,