#include "xfrm_hash.h"
-u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME;
-EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
-
-u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE;
-EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
-
-u32 sysctl_xfrm_acq_expires __read_mostly = 30;
-
/* Each xfrm_state may be linked to two tables:
1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
schedule_work(&net->xfrm.state_hash_work);
}
+static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
+ struct flowi *fl, unsigned short family,
+ xfrm_address_t *daddr, xfrm_address_t *saddr,
+ struct xfrm_state **best, int *acq_in_progress,
+ int *error)
+{
+ /* Resolution logic:
+ * 1. There is a valid state with matching selector. Done.
+ * 2. Valid state with inappropriate selector. Skip.
+ *
+ * Entering area of "sysdeps".
+ *
+ * 3. If state is not valid, selector is temporary, it selects
+ * only session which triggered previous resolution. Key
+ * manager will do something to install a state with proper
+ * selector.
+ */
+ if (x->km.state == XFRM_STATE_VALID) {
+ if ((x->sel.family &&
+ !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
+ !security_xfrm_state_pol_flow_match(x, pol, fl))
+ return;
+
+ if (!*best ||
+ (*best)->km.dying > x->km.dying ||
+ ((*best)->km.dying == x->km.dying &&
+ (*best)->curlft.add_time < x->curlft.add_time))
+ *best = x;
+ } else if (x->km.state == XFRM_STATE_ACQ) {
+ *acq_in_progress = 1;
+ } else if (x->km.state == XFRM_STATE_ERROR ||
+ x->km.state == XFRM_STATE_EXPIRED) {
+ if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
+ security_xfrm_state_pol_flow_match(x, pol, fl))
+ *error = -ESRCH;
+ }
+}
+
struct xfrm_state *
xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
struct flowi *fl, struct xfrm_tmpl *tmpl,
struct xfrm_policy *pol, int *err,
unsigned short family)
{
+ static xfrm_address_t saddr_wildcard = { };
struct net *net = xp_net(pol);
unsigned int h;
struct hlist_node *entry;
xfrm_state_addr_check(x, daddr, saddr, family) &&
tmpl->mode == x->props.mode &&
tmpl->id.proto == x->id.proto &&
- (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) {
- /* Resolution logic:
- 1. There is a valid state with matching selector.
- Done.
- 2. Valid state with inappropriate selector. Skip.
-
- Entering area of "sysdeps".
-
- 3. If state is not valid, selector is temporary,
- it selects only session which triggered
- previous resolution. Key manager will do
- something to install a state with proper
- selector.
- */
- if (x->km.state == XFRM_STATE_VALID) {
- if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
- !security_xfrm_state_pol_flow_match(x, pol, fl))
- continue;
- if (!best ||
- best->km.dying > x->km.dying ||
- (best->km.dying == x->km.dying &&
- best->curlft.add_time < x->curlft.add_time))
- best = x;
- } else if (x->km.state == XFRM_STATE_ACQ) {
- 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, x->sel.family) &&
- security_xfrm_state_pol_flow_match(x, pol, fl))
- error = -ESRCH;
- }
- }
+ (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
+ xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
+ &best, &acquire_in_progress, &error);
+ }
+ if (best)
+ goto found;
+
+ h = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, family);
+ hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
+ if (x->props.family == family &&
+ x->props.reqid == tmpl->reqid &&
+ !(x->props.flags & XFRM_STATE_WILDRECV) &&
+ xfrm_state_addr_check(x, daddr, saddr, family) &&
+ tmpl->mode == x->props.mode &&
+ tmpl->id.proto == x->id.proto &&
+ (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
+ xfrm_state_look_at(pol, x, fl, family, daddr, saddr,
+ &best, &acquire_in_progress, &error);
}
+found:
x = best;
if (!x && !error && !acquire_in_progress) {
if (tmpl->id.spi &&
h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, family);
hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
}
- x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
- x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
+ x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
+ x->timer.expires = jiffies + net->xfrm.sysctl_acq_expires*HZ;
add_timer(&x->timer);
net->xfrm.state_num++;
xfrm_hash_grow_check(net, x->bydst.next != NULL);
x->props.family = family;
x->props.mode = mode;
x->props.reqid = reqid;
- x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
+ x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
xfrm_state_hold(x);
- x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
+ x->timer.expires = jiffies + net->xfrm.sysctl_acq_expires*HZ;
add_timer(&x->timer);
list_add(&x->km.all, &net->xfrm.state_all);
hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
x->inner_mode = inner_mode;
} else {
struct xfrm_mode *inner_mode_iaf;
+ int iafamily = AF_INET;
- inner_mode = xfrm_get_mode(x->props.mode, AF_INET);
+ inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
if (inner_mode == NULL)
goto error;
xfrm_put_mode(inner_mode);
goto error;
}
+ x->inner_mode = inner_mode;
- inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6);
- if (inner_mode_iaf == NULL)
- goto error;
-
- if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) {
- xfrm_put_mode(inner_mode_iaf);
- goto error;
- }
+ if (x->props.family == AF_INET)
+ iafamily = AF_INET6;
- if (x->props.family == AF_INET) {
- x->inner_mode = inner_mode;
- x->inner_mode_iaf = inner_mode_iaf;
- } else {
- x->inner_mode = inner_mode_iaf;
- x->inner_mode_iaf = inner_mode;
+ inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
+ if (inner_mode_iaf) {
+ if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
+ x->inner_mode_iaf = inner_mode_iaf;
+ else
+ xfrm_put_mode(inner_mode_iaf);
}
}
void xfrm_state_fini(struct net *net)
{
+ struct xfrm_audit audit_info;
unsigned int sz;
+ flush_work(&net->xfrm.state_hash_work);
+ audit_info.loginuid = -1;
+ audit_info.sessionid = -1;
+ audit_info.secid = 0;
+ xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
+ flush_work(&net->xfrm.state_gc_work);
+
WARN_ON(!list_empty(&net->xfrm.state_all));
sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff