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-rw-r--r--net/xfrm/xfrm_algo.c13
-rw-r--r--net/xfrm/xfrm_policy.c23
-rw-r--r--net/xfrm/xfrm_replay.c66
-rw-r--r--net/xfrm/xfrm_state.c1
-rw-r--r--net/xfrm/xfrm_user.c17
5 files changed, 115 insertions, 5 deletions
diff --git a/net/xfrm/xfrm_algo.c b/net/xfrm/xfrm_algo.c
index 6fb9d00a75dc..ab4ef72f0b1d 100644
--- a/net/xfrm/xfrm_algo.c
+++ b/net/xfrm/xfrm_algo.c
@@ -311,6 +311,19 @@ static struct xfrm_algo_desc aalg_list[] = {
.sadb_alg_maxbits = 128
}
},
+{
+ /* rfc4494 */
+ .name = "cmac(aes)",
+
+ .uinfo = {
+ .auth = {
+ .icv_truncbits = 96,
+ .icv_fullbits = 128,
+ }
+ },
+
+ .pfkey_supported = 0,
+},
};
static struct xfrm_algo_desc ealg_list[] = {
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 167c67d46c6a..23cea0f74336 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1037,6 +1037,24 @@ __xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir
return xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, fl, family, dir);
}
+static int flow_to_policy_dir(int dir)
+{
+ if (XFRM_POLICY_IN == FLOW_DIR_IN &&
+ XFRM_POLICY_OUT == FLOW_DIR_OUT &&
+ XFRM_POLICY_FWD == FLOW_DIR_FWD)
+ return dir;
+
+ switch (dir) {
+ default:
+ case FLOW_DIR_IN:
+ return XFRM_POLICY_IN;
+ case FLOW_DIR_OUT:
+ return XFRM_POLICY_OUT;
+ case FLOW_DIR_FWD:
+ return XFRM_POLICY_FWD;
+ }
+}
+
static struct flow_cache_object *
xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family,
u8 dir, struct flow_cache_object *old_obj, void *ctx)
@@ -1046,7 +1064,7 @@ xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family,
if (old_obj)
xfrm_pol_put(container_of(old_obj, struct xfrm_policy, flo));
- pol = __xfrm_policy_lookup(net, fl, family, dir);
+ pol = __xfrm_policy_lookup(net, fl, family, flow_to_policy_dir(dir));
if (IS_ERR_OR_NULL(pol))
return ERR_CAST(pol);
@@ -1932,7 +1950,8 @@ xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
* previous cache entry */
if (xdst == NULL) {
num_pols = 1;
- pols[0] = __xfrm_policy_lookup(net, fl, family, dir);
+ pols[0] = __xfrm_policy_lookup(net, fl, family,
+ flow_to_policy_dir(dir));
err = xfrm_expand_policies(fl, family, pols,
&num_pols, &num_xfrms);
if (err < 0)
diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index 35754cc8a9e5..8dafe6d3c6e4 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -334,6 +334,70 @@ static void xfrm_replay_notify_bmp(struct xfrm_state *x, int event)
x->xflags &= ~XFRM_TIME_DEFER;
}
+static void xfrm_replay_notify_esn(struct xfrm_state *x, int event)
+{
+ u32 seq_diff, oseq_diff;
+ struct km_event c;
+ struct xfrm_replay_state_esn *replay_esn = x->replay_esn;
+ struct xfrm_replay_state_esn *preplay_esn = x->preplay_esn;
+
+ /* we send notify messages in case
+ * 1. we updated on of the sequence numbers, and the seqno difference
+ * is at least x->replay_maxdiff, in this case we also update the
+ * timeout of our timer function
+ * 2. if x->replay_maxage has elapsed since last update,
+ * and there were changes
+ *
+ * The state structure must be locked!
+ */
+
+ switch (event) {
+ case XFRM_REPLAY_UPDATE:
+ if (!x->replay_maxdiff)
+ break;
+
+ if (replay_esn->seq_hi == preplay_esn->seq_hi)
+ seq_diff = replay_esn->seq - preplay_esn->seq;
+ else
+ seq_diff = ~preplay_esn->seq + replay_esn->seq + 1;
+
+ if (replay_esn->oseq_hi == preplay_esn->oseq_hi)
+ oseq_diff = replay_esn->oseq - preplay_esn->oseq;
+ else
+ oseq_diff = ~preplay_esn->oseq + replay_esn->oseq + 1;
+
+ if (seq_diff < x->replay_maxdiff &&
+ oseq_diff < x->replay_maxdiff) {
+
+ if (x->xflags & XFRM_TIME_DEFER)
+ event = XFRM_REPLAY_TIMEOUT;
+ else
+ return;
+ }
+
+ break;
+
+ case XFRM_REPLAY_TIMEOUT:
+ if (memcmp(x->replay_esn, x->preplay_esn,
+ xfrm_replay_state_esn_len(replay_esn)) == 0) {
+ x->xflags |= XFRM_TIME_DEFER;
+ return;
+ }
+
+ break;
+ }
+
+ memcpy(x->preplay_esn, x->replay_esn,
+ xfrm_replay_state_esn_len(replay_esn));
+ c.event = XFRM_MSG_NEWAE;
+ c.data.aevent = event;
+ km_state_notify(x, &c);
+
+ if (x->replay_maxage &&
+ !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
+ x->xflags &= ~XFRM_TIME_DEFER;
+}
+
static int xfrm_replay_overflow_esn(struct xfrm_state *x, struct sk_buff *skb)
{
int err = 0;
@@ -510,7 +574,7 @@ static struct xfrm_replay xfrm_replay_esn = {
.advance = xfrm_replay_advance_esn,
.check = xfrm_replay_check_esn,
.recheck = xfrm_replay_recheck_esn,
- .notify = xfrm_replay_notify_bmp,
+ .notify = xfrm_replay_notify_esn,
.overflow = xfrm_replay_overflow_esn,
};
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 2c341bdaf47c..78f66fa92449 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1187,6 +1187,7 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
goto error;
x->props.flags = orig->props.flags;
+ x->props.extra_flags = orig->props.extra_flags;
x->curlft.add_time = orig->curlft.add_time;
x->km.state = orig->km.state;
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index fbd9e6cd0fd7..aa778748c565 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -515,6 +515,9 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
copy_from_user_state(x, p);
+ if (attrs[XFRMA_SA_EXTRA_FLAGS])
+ x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
+
if ((err = attach_aead(&x->aead, &x->props.ealgo,
attrs[XFRMA_ALG_AEAD])))
goto error;
@@ -779,6 +782,13 @@ static int copy_to_user_state_extra(struct xfrm_state *x,
copy_to_user_state(x, p);
+ if (x->props.extra_flags) {
+ ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
+ x->props.extra_flags);
+ if (ret)
+ goto out;
+ }
+
if (x->coaddr) {
ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
if (ret)
@@ -2302,9 +2312,10 @@ static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
[XFRMA_TFCPAD] = { .type = NLA_U32 },
[XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
+ [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
};
-static struct xfrm_link {
+static const struct xfrm_link {
int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
int (*dump)(struct sk_buff *, struct netlink_callback *);
int (*done)(struct netlink_callback *);
@@ -2338,7 +2349,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct nlattr *attrs[XFRMA_MAX+1];
- struct xfrm_link *link;
+ const struct xfrm_link *link;
int type, err;
type = nlh->nlmsg_type;
@@ -2495,6 +2506,8 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x)
x->security->ctx_len);
if (x->coaddr)
l += nla_total_size(sizeof(*x->coaddr));
+ if (x->props.extra_flags)
+ l += nla_total_size(sizeof(x->props.extra_flags));
/* Must count x->lastused as it may become non-zero behind our back. */
l += nla_total_size(sizeof(u64));
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-08 04:35:34 +0000