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[MLSXFRM]: Add security context to acquire messages using PF_KEY

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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>
This commit is contained in:
Venkat Yekkirala 2006-07-24 23:31:14 -07:00 committed by David S. Miller
parent 0d681623d3
commit 4e2ba18eae
1 changed files with 22 additions and 0 deletions
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22
net/key/af_key.c
View file

@ -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);
}