#include <net/netlink.h>
#include <asm/uaccess.h>
-static struct sock *xfrm_nl;
+struct sock *xfrm_nl;
static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
{
x->props.flags = p->flags;
}
+/*
+ * someday when pfkey also has support, we could have the code
+ * somehow made shareable and move it to xfrm_state.c - JHS
+ *
+*/
+static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
+{
+ int err = - EINVAL;
+ struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
+ struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
+ struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
+ struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
+
+ if (rp) {
+ struct xfrm_replay_state *replay;
+ if (RTA_PAYLOAD(rp) < sizeof(*replay))
+ goto error;
+ replay = RTA_DATA(rp);
+ memcpy(&x->replay, replay, sizeof(*replay));
+ memcpy(&x->preplay, replay, sizeof(*replay));
+ }
+
+ if (lt) {
+ struct xfrm_lifetime_cur *ltime;
+ if (RTA_PAYLOAD(lt) < sizeof(*ltime))
+ goto error;
+ ltime = RTA_DATA(lt);
+ x->curlft.bytes = ltime->bytes;
+ x->curlft.packets = ltime->packets;
+ x->curlft.add_time = ltime->add_time;
+ x->curlft.use_time = ltime->use_time;
+ }
+
+ if (et) {
+ if (RTA_PAYLOAD(et) < sizeof(u32))
+ goto error;
+ x->replay_maxage = *(u32*)RTA_DATA(et);
+ }
+
+ if (rt) {
+ if (RTA_PAYLOAD(rt) < sizeof(u32))
+ goto error;
+ x->replay_maxdiff = *(u32*)RTA_DATA(rt);
+ }
+
+ return 0;
+error:
+ return err;
+}
+
static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
struct rtattr **xfrma,
int *errp)
goto error;
x->km.seq = p->seq;
+ x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
+ /* sysctl_xfrm_aevent_etime is in 100ms units */
+ x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
+ x->preplay.bitmap = 0;
+ x->preplay.seq = x->replay.seq+x->replay_maxdiff;
+ x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
+
+ /* override default values from above */
+
+ err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
+ if (err < 0)
+ goto error;
return x;
if (err < 0) {
x->km.state = XFRM_STATE_DEAD;
- xfrm_state_put(x);
+ __xfrm_state_put(x);
goto out;
}
excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
err = xfrm_policy_insert(p->dir, xp, excl);
if (err) {
+ security_xfrm_policy_free(xp);
kfree(xp);
return err;
}
return 0;
}
-static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
+
+static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
+{
+ struct xfrm_aevent_id *id;
+ struct nlmsghdr *nlh;
+ struct xfrm_lifetime_cur ltime;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
+ id = NLMSG_DATA(nlh);
+ nlh->nlmsg_flags = 0;
+
+ id->sa_id.daddr = x->id.daddr;
+ id->sa_id.spi = x->id.spi;
+ id->sa_id.family = x->props.family;
+ id->sa_id.proto = x->id.proto;
+ id->flags = c->data.aevent;
+
+ RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
+
+ ltime.bytes = x->curlft.bytes;
+ ltime.packets = x->curlft.packets;
+ ltime.add_time = x->curlft.add_time;
+ ltime.use_time = x->curlft.use_time;
+
+ RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
+
+ if (id->flags&XFRM_AE_RTHR) {
+ RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
+ }
+
+ if (id->flags&XFRM_AE_ETHR) {
+ u32 etimer = x->replay_maxage*10/HZ;
+ RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
+ }
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+rtattr_failure:
+nlmsg_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
+{
+ struct xfrm_state *x;
+ struct sk_buff *r_skb;
+ int err;
+ struct km_event c;
+ struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
+ int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
+ struct xfrm_usersa_id *id = &p->sa_id;
+
+ len += RTA_SPACE(sizeof(struct xfrm_replay_state));
+ len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
+
+ if (p->flags&XFRM_AE_RTHR)
+ len+=RTA_SPACE(sizeof(u32));
+
+ if (p->flags&XFRM_AE_ETHR)
+ len+=RTA_SPACE(sizeof(u32));
+
+ r_skb = alloc_skb(len, GFP_ATOMIC);
+ if (r_skb == NULL)
+ return -ENOMEM;
+
+ x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
+ if (x == NULL) {
+ kfree(r_skb);
+ return -ESRCH;
+ }
+
+ /*
+ * XXX: is this lock really needed - none of the other
+ * gets lock (the concern is things getting updated
+ * while we are still reading) - jhs
+ */
+ spin_lock_bh(&x->lock);
+ c.data.aevent = p->flags;
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+
+ if (build_aevent(r_skb, x, &c) < 0)
+ BUG();
+ err = netlink_unicast(xfrm_nl, r_skb,
+ NETLINK_CB(skb).pid, MSG_DONTWAIT);
+ spin_unlock_bh(&x->lock);
+ xfrm_state_put(x);
+ return err;
+}
+
+static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
{
+ struct xfrm_state *x;
struct km_event c;
+ int err = - EINVAL;
+ struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
+ struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
+ struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
+
+ if (!lt && !rp)
+ return err;
+
+ /* pedantic mode - thou shalt sayeth replaceth */
+ if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
+ return err;
+
+ x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
+ if (x == NULL)
+ return -ESRCH;
+
+ if (x->km.state != XFRM_STATE_VALID)
+ goto out;
+
+ spin_lock_bh(&x->lock);
+ err = xfrm_update_ae_params(x,(struct rtattr **)xfrma);
+ spin_unlock_bh(&x->lock);
+ if (err < 0)
+ goto out;
+
+ c.event = nlh->nlmsg_type;
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ c.data.aevent = XFRM_AE_CU;
+ km_state_notify(x, &c);
+ err = 0;
+out:
+ xfrm_state_put(x);
+ return err;
+}
+
+static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
+{
+struct km_event c;
xfrm_policy_flush();
c.event = nlh->nlmsg_type;
return 0;
}
+static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
+{
+ struct xfrm_policy *xp;
+ struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
+ struct xfrm_userpolicy_info *p = &up->pol;
+ int err = -ENOENT;
+
+ if (p->index)
+ xp = xfrm_policy_byid(p->dir, p->index, 0);
+ else {
+ struct rtattr **rtattrs = (struct rtattr **)xfrma;
+ struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1];
+ struct xfrm_policy tmp;
+
+ err = verify_sec_ctx_len(rtattrs);
+ if (err)
+ return err;
+
+ memset(&tmp, 0, sizeof(struct xfrm_policy));
+ if (rt) {
+ struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
+
+ if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
+ return err;
+ }
+ xp = xfrm_policy_bysel_ctx(p->dir, &p->sel, tmp.security, 0);
+ security_xfrm_policy_free(&tmp);
+ }
+
+ if (xp == NULL)
+ return err;
+ read_lock(&xp->lock);
+ if (xp->dead) {
+ read_unlock(&xp->lock);
+ goto out;
+ }
+
+ read_unlock(&xp->lock);
+ err = 0;
+ if (up->hard) {
+ xfrm_policy_delete(xp, p->dir);
+ } else {
+ // reset the timers here?
+ printk("Dont know what to do with soft policy expire\n");
+ }
+ km_policy_expired(xp, p->dir, up->hard, current->pid);
+
+out:
+ xfrm_pol_put(xp);
+ return err;
+}
+
+static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
+{
+ struct xfrm_state *x;
+ int err;
+ struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
+ struct xfrm_usersa_info *p = &ue->state;
+
+ x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
+ err = -ENOENT;
+
+ if (x == NULL)
+ return err;
+
+ err = -EINVAL;
+
+ spin_lock_bh(&x->lock);
+ if (x->km.state != XFRM_STATE_VALID)
+ goto out;
+ km_state_expired(x, ue->hard, current->pid);
+
+ if (ue->hard)
+ __xfrm_state_delete(x);
+out:
+ spin_unlock_bh(&x->lock);
+ xfrm_state_put(x);
+ return err;
+}
+
+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))
static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
[XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
[XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
[XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
+ [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
+ [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
};
#undef XMSGSIZE
[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_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
[XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
[XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
+ [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
[XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
[XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
+ [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
+ [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
};
static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
} while (qlen);
}
-static int build_expire(struct sk_buff *skb, struct xfrm_state *x, int hard)
+static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
{
struct xfrm_user_expire *ue;
struct nlmsghdr *nlh;
unsigned char *b = skb->tail;
- nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_EXPIRE,
+ nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
sizeof(*ue));
ue = NLMSG_DATA(nlh);
nlh->nlmsg_flags = 0;
copy_to_user_state(x, &ue->state);
- ue->hard = (hard != 0) ? 1 : 0;
+ ue->hard = (c->data.hard != 0) ? 1 : 0;
nlh->nlmsg_len = skb->tail - b;
return skb->len;
if (skb == NULL)
return -ENOMEM;
- if (build_expire(skb, x, c->data.hard) < 0)
+ if (build_expire(skb, x, c) < 0)
BUG();
NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
}
+static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
+{
+ struct sk_buff *skb;
+ int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
+
+ len += RTA_SPACE(sizeof(struct xfrm_replay_state));
+ len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
+ skb = alloc_skb(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_aevent(skb, x, c) < 0)
+ BUG();
+
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
+}
+
static int xfrm_notify_sa_flush(struct km_event *c)
{
struct xfrm_usersa_flush *p;
switch (c->event) {
case XFRM_MSG_EXPIRE:
return xfrm_exp_state_notify(x, c);
+ case XFRM_MSG_NEWAE:
+ return xfrm_aevent_state_notify(x, c);
case XFRM_MSG_DELSA:
case XFRM_MSG_UPDSA:
case XFRM_MSG_NEWSA:
}
static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
- int dir, int hard)
+ int dir, struct km_event *c)
{
struct xfrm_user_polexpire *upe;
struct nlmsghdr *nlh;
+ int hard = c->data.hard;
unsigned char *b = skb->tail;
- nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
+ nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
upe = NLMSG_DATA(nlh);
nlh->nlmsg_flags = 0;
if (skb == NULL)
return -ENOMEM;
- if (build_polexpire(skb, xp, dir, c->data.hard) < 0)
+ if (build_polexpire(skb, xp, dir, c) < 0)
BUG();
NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
module_exit(xfrm_user_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
+EXPORT_SYMBOL(xfrm_nl);
+
projects / powerpc.git / blobdiff