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authorJamal Hadi Salim <hadi@cyberus.ca>2006-03-21 06:16:40 +0300
committerDavid S. Miller <davem@davemloft.net>2006-03-21 06:16:40 +0300
commit980ebd25794f0f87ac32844e2c73e9e81f0a72ba (patch)
treeda52df6e31bd4b2527c223ca2585e0d792bf3ea2 /net/xfrm
parentd51d081d65048a7a6f9956a7809c3bb504f3b95d (diff)
downloadlinux-980ebd25794f0f87ac32844e2c73e9e81f0a72ba.tar.xz
[IPSEC]: Sync series - acquire insert
This introduces a feature similar to the one described in RFC 2367: " ... the application needing an SA sends a PF_KEY SADB_ACQUIRE message down to the Key Engine, which then either returns an error or sends a similar SADB_ACQUIRE message up to one or more key management applications capable of creating such SAs. ... ... The third is where an application-layer consumer of security associations (e.g. an OSPFv2 or RIPv2 daemon) needs a security association. Send an SADB_ACQUIRE message from a user process to the kernel. <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> The kernel returns an SADB_ACQUIRE message to registered sockets. <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> The user-level consumer waits for an SADB_UPDATE or SADB_ADD message for its particular type, and then can use that association by using SADB_GET messages. " An app such as OSPF could then use ipsec KM to get keys Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_state.c5
-rw-r--r--net/xfrm/xfrm_user.c54
2 files changed, 57 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 8eaee499cad5..a613b5c7d409 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -57,7 +57,7 @@ static 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);
+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);
static void xfrm_state_gc_destroy(struct xfrm_state *x)
@@ -925,7 +925,7 @@ void km_state_expired(struct xfrm_state *x, int hard)
* 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;
@@ -939,6 +939,7 @@ static int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_polic
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)
{
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index e230ba5328d3..d6e6527fd8d7 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1232,6 +1232,58 @@ static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **x
return 0;
}
+static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
+{
+ struct xfrm_policy *xp;
+ struct xfrm_user_tmpl *ut;
+ int i;
+ struct rtattr *rt = xfrma[XFRMA_TMPL-1];
+
+ struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
+ struct xfrm_state *x = xfrm_state_alloc();
+ int err = -ENOMEM;
+
+ if (!x)
+ return err;
+
+ err = verify_newpolicy_info(&ua->policy);
+ if (err) {
+ printk("BAD policy passed\n");
+ kfree(x);
+ return err;
+ }
+
+ /* build an XP */
+ xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); if (!xp) {
+ kfree(x);
+ return err;
+ }
+
+ memcpy(&x->id, &ua->id, sizeof(ua->id));
+ memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
+ memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
+
+ ut = RTA_DATA(rt);
+ /* extract the templates and for each call km_key */
+ for (i = 0; i < xp->xfrm_nr; i++, ut++) {
+ struct xfrm_tmpl *t = &xp->xfrm_vec[i];
+ memcpy(&x->id, &t->id, sizeof(x->id));
+ x->props.mode = t->mode;
+ x->props.reqid = t->reqid;
+ x->props.family = ut->family;
+ t->aalgos = ua->aalgos;
+ t->ealgos = ua->ealgos;
+ t->calgos = ua->calgos;
+ err = km_query(x, t, xp);
+
+ }
+
+ kfree(x);
+ kfree(xp);
+
+ return 0;
+}
+
#define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
@@ -1243,6 +1295,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
[XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
[XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
[XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
+ [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
[XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
[XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
[XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
@@ -1266,6 +1319,7 @@ static struct xfrm_link {
[XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
.dump = xfrm_dump_policy },
[XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
+ [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
[XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
[XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
[XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },