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[IPSEC] xfrm: Abstract out encapsulation modes

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This patch adds the structure xfrm_mode.  It is meant to represent
the operations carried out by transport/tunnel modes.

By doing this we allow additional encapsulation modes to be added
without clogging up the xfrm_input/xfrm_output paths.

Candidate modes include 4-to-6 tunnel mode, 6-to-4 tunnel mode, and
BEET modes.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu
2006-05-27 23:05:54 -07:00
committed by David S. Miller
parent 546be2405b
commit b59f45d0b2
17 changed files with 553 additions and 170 deletions
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6
net/xfrm/xfrm_state.c
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@@ -77,6 +77,8 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x)
kfree(x->ealg);
kfree(x->calg);
kfree(x->encap);
if (x->mode)
xfrm_put_mode(x->mode);
if (x->type) {
x->type->destructor(x);
xfrm_put_type(x->type);
@@ -1193,6 +1195,10 @@ int xfrm_init_state(struct xfrm_state *x)
if (err)
goto error;
x->mode = xfrm_get_mode(x->props.mode, family);
if (x->mode == NULL)
goto error;
x->km.state = XFRM_STATE_VALID;
error: