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authorHerbert Xu <herbert@gondor.apana.org.au>2005-10-05 12:15:12 -0700
committerDavid S. Miller <davem@davemloft.net>2005-10-05 12:15:12 -0700
commit77d8d7a6848c81084f413e1ec4982123a56e2ccb (patch)
tree37a160b0b5fcb8a079bcafec5091fd331e14d54c /net/key/af_key.c
parent140e26fcd559f6988e5a9056385eecade19d9b49 (diff)
downloadblackbird-op-linux-77d8d7a6848c81084f413e1ec4982123a56e2ccb.tar.gz
blackbird-op-linux-77d8d7a6848c81084f413e1ec4982123a56e2ccb.zip
[IPSEC]: Document that policy direction is derived from the index.
Here is a patch that adds a helper called xfrm_policy_id2dir to document the fact that the policy direction can be and is derived from the index. This is based on a patch by YOSHIFUJI Hideaki and 210313105@suda.edu.cn. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/key/af_key.c')
-rw-r--r--net/key/af_key.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 50d0a31c3ba6..bbf0f69181ba 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -2154,6 +2154,7 @@ out:
static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr, void **ext_hdrs)
{
+ unsigned int dir;
int err;
struct sadb_x_policy *pol;
struct xfrm_policy *xp;
@@ -2162,7 +2163,11 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
if ((pol = ext_hdrs[SADB_X_EXT_POLICY-1]) == NULL)
return -EINVAL;
- xp = xfrm_policy_byid(0, pol->sadb_x_policy_id,
+ dir = xfrm_policy_id2dir(pol->sadb_x_policy_id);
+ if (dir >= XFRM_POLICY_MAX)
+ return -EINVAL;
+
+ xp = xfrm_policy_byid(dir, pol->sadb_x_policy_id,
hdr->sadb_msg_type == SADB_X_SPDDELETE2);
if (xp == NULL)
return -ENOENT;
@@ -2174,9 +2179,9 @@ static int pfkey_spdget(struct sock *sk, struct sk_buff *skb, struct sadb_msg *h
if (hdr->sadb_msg_type == SADB_X_SPDDELETE2) {
c.data.byid = 1;
c.event = XFRM_MSG_DELPOLICY;
- km_policy_notify(xp, pol->sadb_x_policy_dir-1, &c);
+ km_policy_notify(xp, dir, &c);
} else {
- err = key_pol_get_resp(sk, xp, hdr, pol->sadb_x_policy_dir-1);
+ err = key_pol_get_resp(sk, xp, hdr, dir);
}
xfrm_pol_put(xp);
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