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

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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
netlink/xfrm_user. 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: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Serge Hallyn 2006-07-24 23:30:44 -07:00 committed by David S. Miller
parent e0d1caa7b0
commit 0d681623d3
1 changed files with 28 additions and 15 deletions
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33
net/xfrm/xfrm_user.c
View file

@ -911,27 +911,40 @@ static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
return -1;
}
static int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
{
if (xp->security) {
int ctx_size = sizeof(struct xfrm_sec_ctx) +
xp->security->ctx_len;
int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
uctx->exttype = XFRMA_SEC_CTX;
uctx->len = ctx_size;
uctx->ctx_doi = xp->security->ctx_doi;
uctx->ctx_alg = xp->security->ctx_alg;
uctx->ctx_len = xp->security->ctx_len;
memcpy(uctx + 1, xp->security->ctx_str, xp->security->ctx_len);
}
uctx->ctx_doi = s->ctx_doi;
uctx->ctx_alg = s->ctx_alg;
uctx->ctx_len = s->ctx_len;
memcpy(uctx + 1, s->ctx_str, s->ctx_len);
return 0;
rtattr_failure:
return -1;
}
static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
{
if (x->security) {
return copy_sec_ctx(x->security, skb);
}
return 0;
}
static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
{
if (xp->security) {
return copy_sec_ctx(xp->security, skb);
}
return 0;
}
static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
{
struct xfrm_dump_info *sp = ptr;
@ -1710,7 +1723,7 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
if (copy_to_user_tmpl(xp, skb) < 0)
goto nlmsg_failure;
if (copy_to_user_sec_ctx(xp, skb))
if (copy_to_user_state_sec_ctx(x, skb))
goto nlmsg_failure;
nlh->nlmsg_len = skb->tail - b;