From 0d681623d30c6565e8b62889f3aa3f4d4662c3e8 Mon Sep 17 00:00:00 2001 From: Serge Hallyn Date: Mon, 24 Jul 2006 23:30:44 -0700 Subject: [PATCH] [MLSXFRM]: Add security context to acquire messages using netlink 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 Signed-off-by: David S. Miller --- net/xfrm/xfrm_user.c | 43 ++++++++++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 15 deletions(-) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index fa79ddc4239e..dac8db1088bc 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -911,25 +911,38 @@ rtattr_failure: 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; - struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); - struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + 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 = 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; - 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); + 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; +} - rtattr_failure: - return -1; +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) @@ -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; -- 2.20.1