* Split up af-specific functions
* Derek Atkins <derek@ihtfp.com>
* Add UDP Encapsulation
- *
+ *
*/
#include <linux/workqueue.h>
#include <linux/module.h>
#include <asm/uaccess.h>
+struct sock *xfrm_nl;
+EXPORT_SYMBOL(xfrm_nl);
+
+u32 sysctl_xfrm_aevent_etime = XFRM_AE_ETIME;
+EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
+
+u32 sysctl_xfrm_aevent_rseqth = XFRM_AE_SEQT_SIZE;
+EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
+
/* Each xfrm_state may be linked to two tables:
1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
static int xfrm_state_gc_flush_bundles;
-static int __xfrm_state_delete(struct xfrm_state *x);
+int __xfrm_state_delete(struct xfrm_state *x);
static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family);
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
-static int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
-static void km_state_expired(struct xfrm_state *x, int hard);
+int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
+void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
static void xfrm_state_gc_destroy(struct xfrm_state *x)
{
if (del_timer(&x->timer))
BUG();
+ if (del_timer(&x->rtimer))
+ BUG();
kfree(x->aalg);
kfree(x->ealg);
kfree(x->calg);
x->type->destructor(x);
xfrm_put_type(x->type);
}
+ security_xfrm_state_free(x);
kfree(x);
}
x->km.dying = warn;
if (warn)
- km_state_expired(x, 0);
+ km_state_expired(x, 0, 0);
resched:
if (next != LONG_MAX &&
!mod_timer(&x->timer, jiffies + make_jiffies(next)))
goto resched;
}
if (!__xfrm_state_delete(x) && x->id.spi)
- km_state_expired(x, 1);
+ km_state_expired(x, 1, 0);
out:
spin_unlock(&x->lock);
xfrm_state_put(x);
}
+static void xfrm_replay_timer_handler(unsigned long data);
+
struct xfrm_state *xfrm_state_alloc(void)
{
struct xfrm_state *x;
init_timer(&x->timer);
x->timer.function = xfrm_timer_handler;
x->timer.data = (unsigned long)x;
+ init_timer(&x->rtimer);
+ x->rtimer.function = xfrm_replay_timer_handler;
+ x->rtimer.data = (unsigned long)x;
x->curlft.add_time = (unsigned long)xtime.tv_sec;
x->lft.soft_byte_limit = XFRM_INF;
x->lft.soft_packet_limit = XFRM_INF;
x->lft.hard_byte_limit = XFRM_INF;
x->lft.hard_packet_limit = XFRM_INF;
+ x->replay_maxage = 0;
+ x->replay_maxdiff = 0;
spin_lock_init(&x->lock);
}
return x;
}
EXPORT_SYMBOL(__xfrm_state_destroy);
-static int __xfrm_state_delete(struct xfrm_state *x)
+int __xfrm_state_delete(struct xfrm_state *x)
{
int err = -ESRCH;
x->km.state = XFRM_STATE_DEAD;
spin_lock(&xfrm_state_lock);
list_del(&x->bydst);
- atomic_dec(&x->refcnt);
+ __xfrm_state_put(x);
if (x->id.spi) {
list_del(&x->byspi);
- atomic_dec(&x->refcnt);
+ __xfrm_state_put(x);
}
spin_unlock(&xfrm_state_lock);
if (del_timer(&x->timer))
- atomic_dec(&x->refcnt);
+ __xfrm_state_put(x);
+ if (del_timer(&x->rtimer))
+ __xfrm_state_put(x);
/* The number two in this test is the reference
* mentioned in the comment below plus the reference
* The xfrm_state_alloc call gives a reference, and that
* is what we are dropping here.
*/
- atomic_dec(&x->refcnt);
+ __xfrm_state_put(x);
err = 0;
}
return err;
}
+EXPORT_SYMBOL(__xfrm_state_delete);
int xfrm_state_delete(struct xfrm_state *x)
{
selector.
*/
if (x->km.state == XFRM_STATE_VALID) {
- if (!xfrm_selector_match(&x->sel, fl, family))
+ if (!xfrm_selector_match(&x->sel, fl, family) ||
+ !xfrm_sec_ctx_match(pol->security, x->security))
continue;
if (!best ||
best->km.dying > x->km.dying ||
acquire_in_progress = 1;
} else if (x->km.state == XFRM_STATE_ERROR ||
x->km.state == XFRM_STATE_EXPIRED) {
- if (xfrm_selector_match(&x->sel, fl, family))
+ if (xfrm_selector_match(&x->sel, fl, family) &&
+ xfrm_sec_ctx_match(pol->security, x->security))
error = -ESRCH;
}
}
if (!mod_timer(&x->timer, jiffies + HZ))
xfrm_state_hold(x);
+ if (x->replay_maxage &&
+ !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
+ xfrm_state_hold(x);
+
wake_up(&km_waitq);
}
(x->curlft.bytes >= x->lft.soft_byte_limit ||
x->curlft.packets >= x->lft.soft_packet_limit)) {
x->km.dying = 1;
- km_state_expired(x, 0);
+ km_state_expired(x, 0, 0);
}
return 0;
}
}
EXPORT_SYMBOL(xfrm_state_walk);
+
+void xfrm_replay_notify(struct xfrm_state *x, int event)
+{
+ struct km_event c;
+ /* 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 &&
+ (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
+ (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
+ if (x->xflags & XFRM_TIME_DEFER)
+ event = XFRM_REPLAY_TIMEOUT;
+ else
+ return;
+ }
+
+ break;
+
+ case XFRM_REPLAY_TIMEOUT:
+ if ((x->replay.seq == x->preplay.seq) &&
+ (x->replay.bitmap == x->preplay.bitmap) &&
+ (x->replay.oseq == x->preplay.oseq)) {
+ x->xflags |= XFRM_TIME_DEFER;
+ return;
+ }
+
+ break;
+ }
+
+ memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
+ 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)) {
+ xfrm_state_hold(x);
+ x->xflags &= ~XFRM_TIME_DEFER;
+ }
+}
+EXPORT_SYMBOL(xfrm_replay_notify);
+
+static void xfrm_replay_timer_handler(unsigned long data)
+{
+ struct xfrm_state *x = (struct xfrm_state*)data;
+
+ spin_lock(&x->lock);
+
+ if (x->km.state == XFRM_STATE_VALID) {
+ if (xfrm_aevent_is_on())
+ xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
+ else
+ x->xflags |= XFRM_TIME_DEFER;
+ }
+
+ spin_unlock(&x->lock);
+ xfrm_state_put(x);
+}
+
int xfrm_replay_check(struct xfrm_state *x, u32 seq)
{
u32 diff;
diff = x->replay.seq - seq;
x->replay.bitmap |= (1U << diff);
}
+
+ if (xfrm_aevent_is_on())
+ xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
}
EXPORT_SYMBOL(xfrm_replay_advance);
EXPORT_SYMBOL(km_policy_notify);
EXPORT_SYMBOL(km_state_notify);
-static void km_state_expired(struct xfrm_state *x, int hard)
+void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
{
struct km_event c;
c.data.hard = hard;
+ c.pid = pid;
c.event = XFRM_MSG_EXPIRE;
km_state_notify(x, &c);
wake_up(&km_waitq);
}
+EXPORT_SYMBOL(km_state_expired);
/*
* We send to all registered managers regardless of failure
* We are happy with one success
*/
-static int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
+int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
{
int err = -EINVAL, acqret;
struct xfrm_mgr *km;
read_unlock(&xfrm_km_lock);
return err;
}
+EXPORT_SYMBOL(km_query);
int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
{
}
EXPORT_SYMBOL(km_new_mapping);
-void km_policy_expired(struct xfrm_policy *pol, int dir, int hard)
+void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
{
struct km_event c;
c.data.hard = hard;
+ c.pid = pid;
c.event = XFRM_MSG_POLEXPIRE;
km_policy_notify(pol, dir, &c);
if (hard)
wake_up(&km_waitq);
}
+EXPORT_SYMBOL(km_policy_expired);
int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
{
return -EINVAL;
if (unlikely(afinfo->family >= NPROTO))
return -EAFNOSUPPORT;
- write_lock(&xfrm_state_afinfo_lock);
+ write_lock_bh(&xfrm_state_afinfo_lock);
if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
err = -ENOBUFS;
else {
afinfo->state_byspi = xfrm_state_byspi;
xfrm_state_afinfo[afinfo->family] = afinfo;
}
- write_unlock(&xfrm_state_afinfo_lock);
+ write_unlock_bh(&xfrm_state_afinfo_lock);
return err;
}
EXPORT_SYMBOL(xfrm_state_register_afinfo);
return -EINVAL;
if (unlikely(afinfo->family >= NPROTO))
return -EAFNOSUPPORT;
- write_lock(&xfrm_state_afinfo_lock);
+ write_lock_bh(&xfrm_state_afinfo_lock);
if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
err = -EINVAL;
afinfo->state_bydst = NULL;
}
}
- write_unlock(&xfrm_state_afinfo_lock);
+ write_unlock_bh(&xfrm_state_afinfo_lock);
return err;
}
EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
git.openpandora.org / pandora-kernel.git / blobdiff