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authorVenkat Yekkirala <vyekkirala@TrustedCS.com>2006-07-24 23:31:14 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-22 14:53:26 -0700
commit4e2ba18eae7f370c7c3ed96eaca747cc9b39f917 (patch)
tree9165d8c0fea650e3cf226d4e0bb3c153978f8ae0 /net/key
parent0d681623d30c6565e8b62889f3aa3f4d4662c3e8 (diff)
[MLSXFRM]: Add security context to acquire messages using PF_KEY
This includes the security context of a security association created for use by IKE in the acquire messages sent to IKE daemons using PF_KEY. This would allow the daemons to include the security context in the negotiation, so that the resultant association is unique to that security context. Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/key')
-rw-r--r--net/key/af_key.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 3a95b2ee4690..a065e1a67773 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -2708,6 +2708,9 @@ static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct
#endif
int sockaddr_size;
int size;
+ struct sadb_x_sec_ctx *sec_ctx;
+ struct xfrm_sec_ctx *xfrm_ctx;
+ int ctx_size = 0;
sockaddr_size = pfkey_sockaddr_size(x->props.family);
if (!sockaddr_size)
@@ -2723,6 +2726,11 @@ static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct
else if (x->id.proto == IPPROTO_ESP)
size += count_esp_combs(t);
+ if ((xfrm_ctx = x->security)) {
+ ctx_size = PFKEY_ALIGN8(xfrm_ctx->ctx_len);
+ size += sizeof(struct sadb_x_sec_ctx) + ctx_size;
+ }
+
skb = alloc_skb(size + 16, GFP_ATOMIC);
if (skb == NULL)
return -ENOMEM;
@@ -2818,6 +2826,20 @@ static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct
else if (x->id.proto == IPPROTO_ESP)
dump_esp_combs(skb, t);
+ /* security context */
+ if (xfrm_ctx) {
+ sec_ctx = (struct sadb_x_sec_ctx *) skb_put(skb,
+ sizeof(struct sadb_x_sec_ctx) + ctx_size);
+ sec_ctx->sadb_x_sec_len =
+ (sizeof(struct sadb_x_sec_ctx) + ctx_size) / sizeof(uint64_t);
+ sec_ctx->sadb_x_sec_exttype = SADB_X_EXT_SEC_CTX;
+ sec_ctx->sadb_x_ctx_doi = xfrm_ctx->ctx_doi;
+ sec_ctx->sadb_x_ctx_alg = xfrm_ctx->ctx_alg;
+ sec_ctx->sadb_x_ctx_len = xfrm_ctx->ctx_len;
+ memcpy(sec_ctx + 1, xfrm_ctx->ctx_str,
+ xfrm_ctx->ctx_len);
+ }
+
return pfkey_broadcast(skb, GFP_ATOMIC, BROADCAST_REGISTERED, NULL);
}