zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/xfrm/xfrm_user.c b/ap/os/linux/linux-3.4.x/net/xfrm/xfrm_user.c
new file mode 100755
index 0000000..812845e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/xfrm/xfrm_user.c
@@ -0,0 +1,3014 @@
+/* xfrm_user.c: User interface to configure xfrm engine.
+ *
+ * Copyright (C) 2002 David S. Miller (davem@redhat.com)
+ *
+ * Changes:
+ * Mitsuru KANDA @USAGI
+ * Kazunori MIYAZAWA @USAGI
+ * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
+ * IPv6 support
+ *
+ */
+
+#include <linux/crypto.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/socket.h>
+#include <linux/string.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+#include <linux/init.h>
+#include <linux/security.h>
+#include <net/sock.h>
+#include <net/xfrm.h>
+#include <net/netlink.h>
+#include <net/ah.h>
+#include <asm/uaccess.h>
+#if IS_ENABLED(CONFIG_IPV6)
+#include <linux/in6.h>
+#endif
+
+static inline int aead_len(struct xfrm_algo_aead *alg)
+{
+ return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
+}
+
+static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
+{
+ struct nlattr *rt = attrs[type];
+ struct xfrm_algo *algp;
+
+ if (!rt)
+ return 0;
+
+ algp = nla_data(rt);
+ if (nla_len(rt) < xfrm_alg_len(algp))
+ return -EINVAL;
+
+ switch (type) {
+ case XFRMA_ALG_AUTH:
+ case XFRMA_ALG_CRYPT:
+ case XFRMA_ALG_COMP:
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
+ return 0;
+}
+
+static int verify_auth_trunc(struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
+ struct xfrm_algo_auth *algp;
+
+ if (!rt)
+ return 0;
+
+ algp = nla_data(rt);
+ if (nla_len(rt) < xfrm_alg_auth_len(algp))
+ return -EINVAL;
+
+ algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
+ return 0;
+}
+
+static int verify_aead(struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
+ struct xfrm_algo_aead *algp;
+
+ if (!rt)
+ return 0;
+
+ algp = nla_data(rt);
+ if (nla_len(rt) < aead_len(algp))
+ return -EINVAL;
+
+ algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
+ return 0;
+}
+
+static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
+ xfrm_address_t **addrp)
+{
+ struct nlattr *rt = attrs[type];
+
+ if (rt && addrp)
+ *addrp = nla_data(rt);
+}
+
+static inline int verify_sec_ctx_len(struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_SEC_CTX];
+ struct xfrm_user_sec_ctx *uctx;
+
+ if (!rt)
+ return 0;
+
+ uctx = nla_data(rt);
+ if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline int verify_replay(struct xfrm_usersa_info *p,
+ struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
+ struct xfrm_replay_state_esn *rs;
+
+ if (p->flags & XFRM_STATE_ESN) {
+ if (!rt)
+ return -EINVAL;
+
+ rs = nla_data(rt);
+
+ if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
+ return -EINVAL;
+
+ if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
+ nla_len(rt) != sizeof(*rs))
+ return -EINVAL;
+ }
+
+ if (!rt)
+ return 0;
+
+ if (p->id.proto != IPPROTO_ESP)
+ return -EINVAL;
+
+ if (p->replay_window != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int verify_newsa_info(struct xfrm_usersa_info *p,
+ struct nlattr **attrs)
+{
+ int err;
+
+ err = -EINVAL;
+ switch (p->family) {
+ case AF_INET:
+ break;
+
+ case AF_INET6:
+#if IS_ENABLED(CONFIG_IPV6)
+ break;
+#else
+ err = -EAFNOSUPPORT;
+ goto out;
+#endif
+
+ default:
+ goto out;
+ }
+
+ err = -EINVAL;
+ switch (p->id.proto) {
+ case IPPROTO_AH:
+ if ((!attrs[XFRMA_ALG_AUTH] &&
+ !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
+ attrs[XFRMA_ALG_AEAD] ||
+ attrs[XFRMA_ALG_CRYPT] ||
+ attrs[XFRMA_ALG_COMP] ||
+ attrs[XFRMA_TFCPAD])
+ goto out;
+ break;
+
+ case IPPROTO_ESP:
+ if (attrs[XFRMA_ALG_COMP])
+ goto out;
+ if (!attrs[XFRMA_ALG_AUTH] &&
+ !attrs[XFRMA_ALG_AUTH_TRUNC] &&
+ !attrs[XFRMA_ALG_CRYPT] &&
+ !attrs[XFRMA_ALG_AEAD])
+ goto out;
+ if ((attrs[XFRMA_ALG_AUTH] ||
+ attrs[XFRMA_ALG_AUTH_TRUNC] ||
+ attrs[XFRMA_ALG_CRYPT]) &&
+ attrs[XFRMA_ALG_AEAD])
+ goto out;
+ if (attrs[XFRMA_TFCPAD] &&
+ p->mode != XFRM_MODE_TUNNEL)
+ goto out;
+ break;
+
+ case IPPROTO_COMP:
+ if (!attrs[XFRMA_ALG_COMP] ||
+ attrs[XFRMA_ALG_AEAD] ||
+ attrs[XFRMA_ALG_AUTH] ||
+ attrs[XFRMA_ALG_AUTH_TRUNC] ||
+ attrs[XFRMA_ALG_CRYPT] ||
+ attrs[XFRMA_TFCPAD])
+ goto out;
+ break;
+
+#if IS_ENABLED(CONFIG_IPV6)
+ case IPPROTO_DSTOPTS:
+ case IPPROTO_ROUTING:
+ if (attrs[XFRMA_ALG_COMP] ||
+ attrs[XFRMA_ALG_AUTH] ||
+ attrs[XFRMA_ALG_AUTH_TRUNC] ||
+ attrs[XFRMA_ALG_AEAD] ||
+ attrs[XFRMA_ALG_CRYPT] ||
+ attrs[XFRMA_ENCAP] ||
+ attrs[XFRMA_SEC_CTX] ||
+ attrs[XFRMA_TFCPAD] ||
+ !attrs[XFRMA_COADDR])
+ goto out;
+ break;
+#endif
+
+ default:
+ goto out;
+ }
+
+ if ((err = verify_aead(attrs)))
+ goto out;
+ if ((err = verify_auth_trunc(attrs)))
+ goto out;
+ if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
+ goto out;
+ if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
+ goto out;
+ if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
+ goto out;
+ if ((err = verify_sec_ctx_len(attrs)))
+ goto out;
+ if ((err = verify_replay(p, attrs)))
+ goto out;
+
+ err = -EINVAL;
+ switch (p->mode) {
+ case XFRM_MODE_TRANSPORT:
+ case XFRM_MODE_TUNNEL:
+ case XFRM_MODE_ROUTEOPTIMIZATION:
+ case XFRM_MODE_BEET:
+ break;
+
+ default:
+ goto out;
+ }
+
+ err = 0;
+
+out:
+ return err;
+}
+
+static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
+ struct xfrm_algo_desc *(*get_byname)(const char *, int),
+ struct nlattr *rta)
+{
+ struct xfrm_algo *p, *ualg;
+ struct xfrm_algo_desc *algo;
+
+ if (!rta)
+ return 0;
+
+ ualg = nla_data(rta);
+
+ algo = get_byname(ualg->alg_name, 1);
+ if (!algo)
+ return -ENOSYS;
+ *props = algo->desc.sadb_alg_id;
+
+ p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ strcpy(p->alg_name, algo->name);
+ *algpp = p;
+ return 0;
+}
+
+static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
+ struct nlattr *rta)
+{
+ struct xfrm_algo *ualg;
+ struct xfrm_algo_auth *p;
+ struct xfrm_algo_desc *algo;
+
+ if (!rta)
+ return 0;
+
+ ualg = nla_data(rta);
+
+ algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
+ if (!algo)
+ return -ENOSYS;
+ *props = algo->desc.sadb_alg_id;
+
+ p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ strcpy(p->alg_name, algo->name);
+ p->alg_key_len = ualg->alg_key_len;
+ p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
+ memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
+
+ *algpp = p;
+ return 0;
+}
+
+static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
+ struct nlattr *rta)
+{
+ struct xfrm_algo_auth *p, *ualg;
+ struct xfrm_algo_desc *algo;
+
+ if (!rta)
+ return 0;
+
+ ualg = nla_data(rta);
+
+ algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
+ if (!algo)
+ return -ENOSYS;
+ if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
+ ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
+ return -EINVAL;
+ *props = algo->desc.sadb_alg_id;
+
+ p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ strcpy(p->alg_name, algo->name);
+ if (!p->alg_trunc_len)
+ p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
+
+ *algpp = p;
+ return 0;
+}
+
+static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
+ struct nlattr *rta)
+{
+ struct xfrm_algo_aead *p, *ualg;
+ struct xfrm_algo_desc *algo;
+
+ if (!rta)
+ return 0;
+
+ ualg = nla_data(rta);
+
+ algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
+ if (!algo)
+ return -ENOSYS;
+ *props = algo->desc.sadb_alg_id;
+
+ p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ strcpy(p->alg_name, algo->name);
+ *algpp = p;
+ return 0;
+}
+
+static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
+ struct nlattr *rp)
+{
+ struct xfrm_replay_state_esn *up;
+ int ulen;
+
+ if (!replay_esn || !rp)
+ return 0;
+
+ up = nla_data(rp);
+ ulen = xfrm_replay_state_esn_len(up);
+
+ if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
+ struct xfrm_replay_state_esn **preplay_esn,
+ struct nlattr *rta)
+{
+ struct xfrm_replay_state_esn *p, *pp, *up;
+ int klen, ulen;
+
+ if (!rta)
+ return 0;
+
+ up = nla_data(rta);
+ klen = xfrm_replay_state_esn_len(up);
+ ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
+
+ p = kzalloc(klen, GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ pp = kzalloc(klen, GFP_KERNEL);
+ if (!pp) {
+ kfree(p);
+ return -ENOMEM;
+ }
+
+ memcpy(p, up, ulen);
+ memcpy(pp, up, ulen);
+
+ *replay_esn = p;
+ *preplay_esn = pp;
+
+ return 0;
+}
+
+static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
+{
+ int len = 0;
+
+ if (xfrm_ctx) {
+ len += sizeof(struct xfrm_user_sec_ctx);
+ len += xfrm_ctx->ctx_len;
+ }
+ return len;
+}
+
+static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
+{
+ memcpy(&x->id, &p->id, sizeof(x->id));
+ memcpy(&x->sel, &p->sel, sizeof(x->sel));
+ memcpy(&x->lft, &p->lft, sizeof(x->lft));
+ x->props.mode = p->mode;
+ x->props.replay_window = p->replay_window;
+ x->props.reqid = p->reqid;
+ x->props.family = p->family;
+ memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
+ x->props.flags = p->flags;
+
+ if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
+ x->sel.family = p->family;
+}
+
+/*
+ * someday when pfkey also has support, we could have the code
+ * somehow made shareable and move it to xfrm_state.c - JHS
+ *
+*/
+static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
+ int update_esn)
+{
+ struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
+ struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
+ struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
+ struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
+ struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
+
+ if (re) {
+ struct xfrm_replay_state_esn *replay_esn;
+ replay_esn = nla_data(re);
+ memcpy(x->replay_esn, replay_esn,
+ xfrm_replay_state_esn_len(replay_esn));
+ memcpy(x->preplay_esn, replay_esn,
+ xfrm_replay_state_esn_len(replay_esn));
+ }
+
+ if (rp) {
+ struct xfrm_replay_state *replay;
+ replay = nla_data(rp);
+ memcpy(&x->replay, replay, sizeof(*replay));
+ memcpy(&x->preplay, replay, sizeof(*replay));
+ }
+
+ if (lt) {
+ struct xfrm_lifetime_cur *ltime;
+ ltime = nla_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)
+ x->replay_maxage = nla_get_u32(et);
+
+ if (rt)
+ x->replay_maxdiff = nla_get_u32(rt);
+}
+
+static struct xfrm_state *xfrm_state_construct(struct net *net,
+ struct xfrm_usersa_info *p,
+ struct nlattr **attrs,
+ int *errp)
+{
+ struct xfrm_state *x = xfrm_state_alloc(net);
+ int err = -ENOMEM;
+
+ if (!x)
+ goto error_no_put;
+
+ copy_from_user_state(x, p);
+
+ if ((err = attach_aead(&x->aead, &x->props.ealgo,
+ attrs[XFRMA_ALG_AEAD])))
+ goto error;
+ if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
+ attrs[XFRMA_ALG_AUTH_TRUNC])))
+ goto error;
+ if (!x->props.aalgo) {
+ if ((err = attach_auth(&x->aalg, &x->props.aalgo,
+ attrs[XFRMA_ALG_AUTH])))
+ goto error;
+ }
+ if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
+ xfrm_ealg_get_byname,
+ attrs[XFRMA_ALG_CRYPT])))
+ goto error;
+ if ((err = attach_one_algo(&x->calg, &x->props.calgo,
+ xfrm_calg_get_byname,
+ attrs[XFRMA_ALG_COMP])))
+ goto error;
+
+ if (attrs[XFRMA_ENCAP]) {
+ x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
+ sizeof(*x->encap), GFP_KERNEL);
+ if (x->encap == NULL)
+ goto error;
+ }
+
+ if (attrs[XFRMA_TFCPAD])
+ x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
+
+ if (attrs[XFRMA_COADDR]) {
+ x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
+ sizeof(*x->coaddr), GFP_KERNEL);
+ if (x->coaddr == NULL)
+ goto error;
+ }
+
+ xfrm_mark_get(attrs, &x->mark);
+
+ err = __xfrm_init_state(x, false);
+ if (err)
+ goto error;
+
+ if (attrs[XFRMA_SEC_CTX] &&
+ security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
+ goto error;
+
+ if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
+ attrs[XFRMA_REPLAY_ESN_VAL])))
+ goto error;
+
+ x->km.seq = p->seq;
+ x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
+ /* sysctl_xfrm_aevent_etime is in 100ms units */
+ x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
+
+ if ((err = xfrm_init_replay(x)))
+ goto error;
+
+ /* override default values from above */
+ xfrm_update_ae_params(x, attrs, 0);
+
+ return x;
+
+error:
+ x->km.state = XFRM_STATE_DEAD;
+ xfrm_state_put(x);
+error_no_put:
+ *errp = err;
+ return NULL;
+}
+
+static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_usersa_info *p = nlmsg_data(nlh);
+ struct xfrm_state *x;
+ int err;
+ struct km_event c;
+ uid_t loginuid = audit_get_loginuid(current);
+ u32 sessionid = audit_get_sessionid(current);
+ u32 sid;
+
+ err = verify_newsa_info(p, attrs);
+ if (err)
+ return err;
+
+ x = xfrm_state_construct(net, p, attrs, &err);
+ if (!x)
+ return err;
+
+ xfrm_state_hold(x);
+ if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
+ err = xfrm_state_add(x);
+ else
+ err = xfrm_state_update(x);
+
+ security_task_getsecid(current, &sid);
+ xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
+
+ if (err < 0) {
+ x->km.state = XFRM_STATE_DEAD;
+ __xfrm_state_put(x);
+ goto out;
+ }
+
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ c.event = nlh->nlmsg_type;
+
+ km_state_notify(x, &c);
+out:
+ xfrm_state_put(x);
+ return err;
+}
+
+static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
+ struct xfrm_usersa_id *p,
+ struct nlattr **attrs,
+ int *errp)
+{
+ struct xfrm_state *x = NULL;
+ struct xfrm_mark m;
+ int err;
+ u32 mark = xfrm_mark_get(attrs, &m);
+
+ if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
+ err = -ESRCH;
+ x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
+ } else {
+ xfrm_address_t *saddr = NULL;
+
+ verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
+ if (!saddr) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = -ESRCH;
+ x = xfrm_state_lookup_byaddr(net, mark,
+ &p->daddr, saddr,
+ p->proto, p->family);
+ }
+
+ out:
+ if (!x && errp)
+ *errp = err;
+ return x;
+}
+
+static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_state *x;
+ int err = -ESRCH;
+ struct km_event c;
+ struct xfrm_usersa_id *p = nlmsg_data(nlh);
+ uid_t loginuid = audit_get_loginuid(current);
+ u32 sessionid = audit_get_sessionid(current);
+ u32 sid;
+
+ x = xfrm_user_state_lookup(net, p, attrs, &err);
+ if (x == NULL)
+ return err;
+
+ if ((err = security_xfrm_state_delete(x)) != 0)
+ goto out;
+
+ if (xfrm_state_kern(x)) {
+ err = -EPERM;
+ goto out;
+ }
+
+ err = xfrm_state_delete(x);
+
+ if (err < 0)
+ goto out;
+
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ c.event = nlh->nlmsg_type;
+ km_state_notify(x, &c);
+
+out:
+ security_task_getsecid(current, &sid);
+ xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
+ xfrm_state_put(x);
+ return err;
+}
+
+static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
+{
+ memset(p, 0, sizeof(*p));
+ memcpy(&p->id, &x->id, sizeof(p->id));
+ memcpy(&p->sel, &x->sel, sizeof(p->sel));
+ memcpy(&p->lft, &x->lft, sizeof(p->lft));
+ memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
+ memcpy(&p->stats, &x->stats, sizeof(p->stats));
+ memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
+ p->mode = x->props.mode;
+ p->replay_window = x->props.replay_window;
+ p->reqid = x->props.reqid;
+ p->family = x->props.family;
+ p->flags = x->props.flags;
+ p->seq = x->km.seq;
+}
+
+struct xfrm_dump_info {
+ struct sk_buff *in_skb;
+ struct sk_buff *out_skb;
+ u32 nlmsg_seq;
+ u16 nlmsg_flags;
+};
+
+static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
+{
+ struct xfrm_user_sec_ctx *uctx;
+ struct nlattr *attr;
+ int ctx_size = sizeof(*uctx) + s->ctx_len;
+
+ attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
+ if (attr == NULL)
+ return -EMSGSIZE;
+
+ uctx = nla_data(attr);
+ uctx->exttype = XFRMA_SEC_CTX;
+ uctx->len = ctx_size;
+ uctx->ctx_doi = s->ctx_doi;
+ uctx->ctx_alg = s->ctx_alg;
+ uctx->ctx_len = s->ctx_len;
+ memcpy(uctx + 1, s->ctx_str, s->ctx_len);
+
+ return 0;
+}
+
+static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
+{
+ struct xfrm_algo *algo;
+ struct nlattr *nla;
+
+ nla = nla_reserve(skb, XFRMA_ALG_AUTH,
+ sizeof(*algo) + (auth->alg_key_len + 7) / 8);
+ if (!nla)
+ return -EMSGSIZE;
+
+ algo = nla_data(nla);
+ strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
+ memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
+ algo->alg_key_len = auth->alg_key_len;
+
+ return 0;
+}
+
+/* Don't change this without updating xfrm_sa_len! */
+static int copy_to_user_state_extra(struct xfrm_state *x,
+ struct xfrm_usersa_info *p,
+ struct sk_buff *skb)
+{
+ copy_to_user_state(x, p);
+
+ if (x->coaddr)
+ NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
+
+ if (x->lastused)
+ NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
+
+ if (x->aead)
+ NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
+ if (x->aalg) {
+ if (copy_to_user_auth(x->aalg, skb))
+ goto nla_put_failure;
+
+ NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
+ xfrm_alg_auth_len(x->aalg), x->aalg);
+ }
+ if (x->ealg)
+ NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
+ if (x->calg)
+ NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
+
+ if (x->encap)
+ NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
+
+ if (x->tfcpad)
+ NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
+
+ if (xfrm_mark_put(skb, &x->mark))
+ goto nla_put_failure;
+
+ if (x->replay_esn)
+ NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
+ xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
+
+ if (x->security && copy_sec_ctx(x->security, skb) < 0)
+ goto nla_put_failure;
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
+{
+ struct xfrm_dump_info *sp = ptr;
+ struct sk_buff *in_skb = sp->in_skb;
+ struct sk_buff *skb = sp->out_skb;
+ struct xfrm_usersa_info *p;
+ struct nlmsghdr *nlh;
+ int err;
+
+ nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
+ XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ p = nlmsg_data(nlh);
+
+ err = copy_to_user_state_extra(x, p, skb);
+ if (err)
+ goto nla_put_failure;
+
+ nlmsg_end(skb, nlh);
+ return 0;
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return err;
+}
+
+static int xfrm_dump_sa_done(struct netlink_callback *cb)
+{
+ struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
+ xfrm_state_walk_done(walk);
+ return 0;
+}
+
+static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
+ struct xfrm_dump_info info;
+
+ BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
+ sizeof(cb->args) - sizeof(cb->args[0]));
+
+ info.in_skb = cb->skb;
+ info.out_skb = skb;
+ info.nlmsg_seq = cb->nlh->nlmsg_seq;
+ info.nlmsg_flags = NLM_F_MULTI;
+
+ if (!cb->args[0]) {
+ cb->args[0] = 1;
+ xfrm_state_walk_init(walk, 0);
+ }
+
+ (void) xfrm_state_walk(net, walk, dump_one_state, &info);
+
+ return skb->len;
+}
+
+static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
+ struct xfrm_state *x, u32 seq)
+{
+ struct xfrm_dump_info info;
+ struct sk_buff *skb;
+ int err;
+
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ info.in_skb = in_skb;
+ info.out_skb = skb;
+ info.nlmsg_seq = seq;
+ info.nlmsg_flags = 0;
+
+ err = dump_one_state(x, 0, &info);
+ if (err) {
+ kfree_skb(skb);
+ return ERR_PTR(err);
+ }
+
+ return skb;
+}
+
+static inline size_t xfrm_spdinfo_msgsize(void)
+{
+ return NLMSG_ALIGN(4)
+ + nla_total_size(sizeof(struct xfrmu_spdinfo))
+ + nla_total_size(sizeof(struct xfrmu_spdhinfo));
+}
+
+static int build_spdinfo(struct sk_buff *skb, struct net *net,
+ u32 pid, u32 seq, u32 flags)
+{
+ struct xfrmk_spdinfo si;
+ struct xfrmu_spdinfo spc;
+ struct xfrmu_spdhinfo sph;
+ struct nlmsghdr *nlh;
+ u32 *f;
+
+ nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
+ if (nlh == NULL) /* shouldn't really happen ... */
+ return -EMSGSIZE;
+
+ f = nlmsg_data(nlh);
+ *f = flags;
+ xfrm_spd_getinfo(net, &si);
+ spc.incnt = si.incnt;
+ spc.outcnt = si.outcnt;
+ spc.fwdcnt = si.fwdcnt;
+ spc.inscnt = si.inscnt;
+ spc.outscnt = si.outscnt;
+ spc.fwdscnt = si.fwdscnt;
+ sph.spdhcnt = si.spdhcnt;
+ sph.spdhmcnt = si.spdhmcnt;
+
+ NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
+ NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct sk_buff *r_skb;
+ u32 *flags = nlmsg_data(nlh);
+ u32 spid = NETLINK_CB(skb).pid;
+ u32 seq = nlh->nlmsg_seq;
+
+ r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
+ if (r_skb == NULL)
+ return -ENOMEM;
+
+ if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
+ BUG();
+
+ return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
+}
+
+static inline size_t xfrm_sadinfo_msgsize(void)
+{
+ return NLMSG_ALIGN(4)
+ + nla_total_size(sizeof(struct xfrmu_sadhinfo))
+ + nla_total_size(4); /* XFRMA_SAD_CNT */
+}
+
+static int build_sadinfo(struct sk_buff *skb, struct net *net,
+ u32 pid, u32 seq, u32 flags)
+{
+ struct xfrmk_sadinfo si;
+ struct xfrmu_sadhinfo sh;
+ struct nlmsghdr *nlh;
+ u32 *f;
+
+ nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
+ if (nlh == NULL) /* shouldn't really happen ... */
+ return -EMSGSIZE;
+
+ f = nlmsg_data(nlh);
+ *f = flags;
+ xfrm_sad_getinfo(net, &si);
+
+ sh.sadhmcnt = si.sadhmcnt;
+ sh.sadhcnt = si.sadhcnt;
+
+ NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
+ NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct sk_buff *r_skb;
+ u32 *flags = nlmsg_data(nlh);
+ u32 spid = NETLINK_CB(skb).pid;
+ u32 seq = nlh->nlmsg_seq;
+
+ r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
+ if (r_skb == NULL)
+ return -ENOMEM;
+
+ if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
+ BUG();
+
+ return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
+}
+
+static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_usersa_id *p = nlmsg_data(nlh);
+ struct xfrm_state *x;
+ struct sk_buff *resp_skb;
+ int err = -ESRCH;
+
+ x = xfrm_user_state_lookup(net, p, attrs, &err);
+ if (x == NULL)
+ goto out_noput;
+
+ resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
+ if (IS_ERR(resp_skb)) {
+ err = PTR_ERR(resp_skb);
+ } else {
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
+ }
+ xfrm_state_put(x);
+out_noput:
+ return err;
+}
+
+static int verify_userspi_info(struct xfrm_userspi_info *p)
+{
+ switch (p->info.id.proto) {
+ case IPPROTO_AH:
+ case IPPROTO_ESP:
+ break;
+
+ case IPPROTO_COMP:
+ /* IPCOMP spi is 16-bits. */
+ if (p->max >= 0x10000)
+ return -EINVAL;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (p->min > p->max)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_state *x;
+ struct xfrm_userspi_info *p;
+ struct sk_buff *resp_skb;
+ xfrm_address_t *daddr;
+ int family;
+ int err;
+ u32 mark;
+ struct xfrm_mark m;
+
+ p = nlmsg_data(nlh);
+ err = verify_userspi_info(p);
+ if (err)
+ goto out_noput;
+
+ family = p->info.family;
+ daddr = &p->info.id.daddr;
+
+ x = NULL;
+
+ mark = xfrm_mark_get(attrs, &m);
+ if (p->info.seq) {
+ x = xfrm_find_acq_byseq(net, mark, p->info.seq);
+ if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
+ xfrm_state_put(x);
+ x = NULL;
+ }
+ }
+
+ if (!x)
+ x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
+ p->info.id.proto, daddr,
+ &p->info.saddr, 1,
+ family);
+ err = -ENOENT;
+ if (x == NULL)
+ goto out_noput;
+
+ err = xfrm_alloc_spi(x, p->min, p->max);
+ if (err)
+ goto out;
+
+ resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
+ if (IS_ERR(resp_skb)) {
+ err = PTR_ERR(resp_skb);
+ goto out;
+ }
+
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
+
+out:
+ xfrm_state_put(x);
+out_noput:
+ return err;
+}
+
+static int verify_policy_dir(u8 dir)
+{
+ switch (dir) {
+ case XFRM_POLICY_IN:
+ case XFRM_POLICY_OUT:
+ case XFRM_POLICY_FWD:
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int verify_policy_type(u8 type)
+{
+ switch (type) {
+ case XFRM_POLICY_TYPE_MAIN:
+#ifdef CONFIG_XFRM_SUB_POLICY
+ case XFRM_POLICY_TYPE_SUB:
+#endif
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
+{
+ int ret;
+
+ switch (p->share) {
+ case XFRM_SHARE_ANY:
+ case XFRM_SHARE_SESSION:
+ case XFRM_SHARE_USER:
+ case XFRM_SHARE_UNIQUE:
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ switch (p->action) {
+ case XFRM_POLICY_ALLOW:
+ case XFRM_POLICY_BLOCK:
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ switch (p->sel.family) {
+ case AF_INET:
+ break;
+
+ case AF_INET6:
+#if IS_ENABLED(CONFIG_IPV6)
+ break;
+#else
+ return -EAFNOSUPPORT;
+#endif
+
+ default:
+ return -EINVAL;
+ }
+//hubÖÎÀí£ºCVE-2019-15666
+ ret = verify_policy_dir(p->dir);
+ if (ret)
+ return ret;
+ if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_SEC_CTX];
+ struct xfrm_user_sec_ctx *uctx;
+
+ if (!rt)
+ return 0;
+
+ uctx = nla_data(rt);
+ return security_xfrm_policy_alloc(&pol->security, uctx);
+}
+
+static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
+ int nr)
+{
+ int i;
+
+ xp->xfrm_nr = nr;
+ for (i = 0; i < nr; i++, ut++) {
+ struct xfrm_tmpl *t = &xp->xfrm_vec[i];
+
+ memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
+ memcpy(&t->saddr, &ut->saddr,
+ sizeof(xfrm_address_t));
+ t->reqid = ut->reqid;
+ t->mode = ut->mode;
+ t->share = ut->share;
+ t->optional = ut->optional;
+ t->aalgos = ut->aalgos;
+ t->ealgos = ut->ealgos;
+ t->calgos = ut->calgos;
+ /* If all masks are ~0, then we allow all algorithms. */
+ t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
+ t->encap_family = ut->family;
+ }
+}
+
+static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
+{
+ int i;
+
+ if (nr > XFRM_MAX_DEPTH)
+ return -EINVAL;
+
+ for (i = 0; i < nr; i++) {
+ /* We never validated the ut->family value, so many
+ * applications simply leave it at zero. The check was
+ * never made and ut->family was ignored because all
+ * templates could be assumed to have the same family as
+ * the policy itself. Now that we will have ipv4-in-ipv6
+ * and ipv6-in-ipv4 tunnels, this is no longer true.
+ */
+ if (!ut[i].family)
+ ut[i].family = family;
+
+ switch (ut[i].family) {
+ case AF_INET:
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case AF_INET6:
+ break;
+#endif
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_TMPL];
+
+ if (!rt) {
+ pol->xfrm_nr = 0;
+ } else {
+ struct xfrm_user_tmpl *utmpl = nla_data(rt);
+ int nr = nla_len(rt) / sizeof(*utmpl);
+ int err;
+
+ err = validate_tmpl(nr, utmpl, pol->family);
+ if (err)
+ return err;
+
+ copy_templates(pol, utmpl, nr);
+ }
+ return 0;
+}
+
+static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
+{
+ struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
+ struct xfrm_userpolicy_type *upt;
+ u8 type = XFRM_POLICY_TYPE_MAIN;
+ int err;
+
+ if (rt) {
+ upt = nla_data(rt);
+ type = upt->type;
+ }
+
+ err = verify_policy_type(type);
+ if (err)
+ return err;
+
+ *tp = type;
+ return 0;
+}
+
+static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
+{
+ xp->priority = p->priority;
+ xp->index = p->index;
+ memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
+ memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
+ xp->action = p->action;
+ xp->flags = p->flags;
+ xp->family = p->sel.family;
+ /* XXX xp->share = p->share; */
+}
+
+static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
+{
+ memset(p, 0, sizeof(*p));
+ memcpy(&p->sel, &xp->selector, sizeof(p->sel));
+ memcpy(&p->lft, &xp->lft, sizeof(p->lft));
+ memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
+ p->priority = xp->priority;
+ p->index = xp->index;
+ p->sel.family = xp->family;
+ p->dir = dir;
+ p->action = xp->action;
+ p->flags = xp->flags;
+ p->share = XFRM_SHARE_ANY; /* XXX xp->share */
+}
+
+static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
+{
+ struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
+ int err;
+
+ if (!xp) {
+ *errp = -ENOMEM;
+ return NULL;
+ }
+
+ copy_from_user_policy(xp, p);
+
+ err = copy_from_user_policy_type(&xp->type, attrs);
+ if (err)
+ goto error;
+
+ if (!(err = copy_from_user_tmpl(xp, attrs)))
+ err = copy_from_user_sec_ctx(xp, attrs);
+ if (err)
+ goto error;
+
+ xfrm_mark_get(attrs, &xp->mark);
+
+ return xp;
+ error:
+ *errp = err;
+ xp->walk.dead = 1;
+ xfrm_policy_destroy(xp);
+ return NULL;
+}
+
+static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
+ struct xfrm_policy *xp;
+ struct km_event c;
+ int err;
+ int excl;
+ uid_t loginuid = audit_get_loginuid(current);
+ u32 sessionid = audit_get_sessionid(current);
+ u32 sid;
+
+ err = verify_newpolicy_info(p);
+ if (err)
+ return err;
+ err = verify_sec_ctx_len(attrs);
+ if (err)
+ return err;
+
+ xp = xfrm_policy_construct(net, p, attrs, &err);
+ if (!xp)
+ return err;
+
+ /* shouldn't excl be based on nlh flags??
+ * Aha! this is anti-netlink really i.e more pfkey derived
+ * in netlink excl is a flag and you wouldnt need
+ * a type XFRM_MSG_UPDPOLICY - JHS */
+ excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
+ err = xfrm_policy_insert(p->dir, xp, excl);
+ security_task_getsecid(current, &sid);
+ xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
+
+ if (err) {
+ security_xfrm_policy_free(xp->security);
+ kfree(xp);
+ return err;
+ }
+
+ c.event = nlh->nlmsg_type;
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ km_policy_notify(xp, p->dir, &c);
+
+ xfrm_pol_put(xp);
+
+ return 0;
+}
+
+static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
+{
+ struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
+ int i;
+
+ if (xp->xfrm_nr == 0)
+ return 0;
+
+ for (i = 0; i < xp->xfrm_nr; i++) {
+ struct xfrm_user_tmpl *up = &vec[i];
+ struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
+
+ memset(up, 0, sizeof(*up));
+ memcpy(&up->id, &kp->id, sizeof(up->id));
+ up->family = kp->encap_family;
+ memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
+ up->reqid = kp->reqid;
+ up->mode = kp->mode;
+ up->share = kp->share;
+ up->optional = kp->optional;
+ up->aalgos = kp->aalgos;
+ up->ealgos = kp->ealgos;
+ up->calgos = kp->calgos;
+ }
+
+ return nla_put(skb, XFRMA_TMPL,
+ sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
+}
+
+static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
+{
+ if (x->security) {
+ return copy_sec_ctx(x->security, skb);
+ }
+ return 0;
+}
+
+static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
+{
+ if (xp->security) {
+ return copy_sec_ctx(xp->security, skb);
+ }
+ return 0;
+}
+static inline size_t userpolicy_type_attrsize(void)
+{
+#ifdef CONFIG_XFRM_SUB_POLICY
+ return nla_total_size(sizeof(struct xfrm_userpolicy_type));
+#else
+ return 0;
+#endif
+}
+
+#ifdef CONFIG_XFRM_SUB_POLICY
+static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
+{
+ struct xfrm_userpolicy_type upt = {
+ .type = type,
+ };
+
+ return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
+}
+
+#else
+static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
+{
+ return 0;
+}
+#endif
+
+static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
+{
+ struct xfrm_dump_info *sp = ptr;
+ struct xfrm_userpolicy_info *p;
+ struct sk_buff *in_skb = sp->in_skb;
+ struct sk_buff *skb = sp->out_skb;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
+ XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ p = nlmsg_data(nlh);
+ copy_to_user_policy(xp, p, dir);
+ if (copy_to_user_tmpl(xp, skb) < 0)
+ goto nlmsg_failure;
+ if (copy_to_user_sec_ctx(xp, skb))
+ goto nlmsg_failure;
+ if (copy_to_user_policy_type(xp->type, skb) < 0)
+ goto nlmsg_failure;
+ if (xfrm_mark_put(skb, &xp->mark))
+ goto nla_put_failure;
+
+ nlmsg_end(skb, nlh);
+ return 0;
+
+nla_put_failure:
+nlmsg_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_dump_policy_done(struct netlink_callback *cb)
+{
+ struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
+
+ xfrm_policy_walk_done(walk);
+ return 0;
+}
+
+static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
+ struct xfrm_dump_info info;
+
+ BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
+ sizeof(cb->args) - sizeof(cb->args[0]));
+
+ info.in_skb = cb->skb;
+ info.out_skb = skb;
+ info.nlmsg_seq = cb->nlh->nlmsg_seq;
+ info.nlmsg_flags = NLM_F_MULTI;
+
+ if (!cb->args[0]) {
+ cb->args[0] = 1;
+ xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
+ }
+
+ (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
+
+ return skb->len;
+}
+
+static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
+ struct xfrm_policy *xp,
+ int dir, u32 seq)
+{
+ struct xfrm_dump_info info;
+ struct sk_buff *skb;
+ int err;
+
+ skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!skb)
+ return ERR_PTR(-ENOMEM);
+
+ info.in_skb = in_skb;
+ info.out_skb = skb;
+ info.nlmsg_seq = seq;
+ info.nlmsg_flags = 0;
+
+ err = dump_one_policy(xp, dir, 0, &info);
+ if (err) {
+ kfree_skb(skb);
+ return ERR_PTR(err);
+ }
+
+ return skb;
+}
+
+static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_policy *xp;
+ struct xfrm_userpolicy_id *p;
+ u8 type = XFRM_POLICY_TYPE_MAIN;
+ int err;
+ struct km_event c;
+ int delete;
+ struct xfrm_mark m;
+ u32 mark = xfrm_mark_get(attrs, &m);
+
+ p = nlmsg_data(nlh);
+ delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
+
+ err = copy_from_user_policy_type(&type, attrs);
+ if (err)
+ return err;
+
+ err = verify_policy_dir(p->dir);
+ if (err)
+ return err;
+
+ if (p->index)
+ xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
+ else {
+ struct nlattr *rt = attrs[XFRMA_SEC_CTX];
+ struct xfrm_sec_ctx *ctx;
+
+ err = verify_sec_ctx_len(attrs);
+ if (err)
+ return err;
+
+ ctx = NULL;
+ if (rt) {
+ struct xfrm_user_sec_ctx *uctx = nla_data(rt);
+
+ err = security_xfrm_policy_alloc(&ctx, uctx);
+ if (err)
+ return err;
+ }
+ xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
+ ctx, delete, &err);
+ security_xfrm_policy_free(ctx);
+ }
+ if (xp == NULL)
+ return -ENOENT;
+
+ if (!delete) {
+ struct sk_buff *resp_skb;
+
+ resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
+ if (IS_ERR(resp_skb)) {
+ err = PTR_ERR(resp_skb);
+ } else {
+ err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
+ NETLINK_CB(skb).pid);
+ }
+ } else {
+ uid_t loginuid = audit_get_loginuid(current);
+ u32 sessionid = audit_get_sessionid(current);
+ u32 sid;
+
+ security_task_getsecid(current, &sid);
+ xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
+ sid);
+
+ if (err != 0)
+ goto out;
+
+ c.data.byid = p->index;
+ c.event = nlh->nlmsg_type;
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ km_policy_notify(xp, p->dir, &c);
+ }
+
+out:
+ xfrm_pol_put(xp);
+ return err;
+}
+
+static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct km_event c;
+ struct xfrm_usersa_flush *p = nlmsg_data(nlh);
+ struct xfrm_audit audit_info;
+ int err;
+
+ audit_info.loginuid = audit_get_loginuid(current);
+ audit_info.sessionid = audit_get_sessionid(current);
+ security_task_getsecid(current, &audit_info.secid);
+ err = xfrm_state_flush(net, p->proto, &audit_info);
+ if (err) {
+ if (err == -ESRCH) /* empty table */
+ return 0;
+ return err;
+ }
+ c.data.proto = p->proto;
+ c.event = nlh->nlmsg_type;
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ c.net = net;
+ km_state_notify(NULL, &c);
+
+ return 0;
+}
+
+static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
+{
+ size_t replay_size = x->replay_esn ?
+ xfrm_replay_state_esn_len(x->replay_esn) :
+ sizeof(struct xfrm_replay_state);
+
+ return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
+ + nla_total_size(replay_size)
+ + nla_total_size(sizeof(struct xfrm_lifetime_cur))
+ + nla_total_size(sizeof(struct xfrm_mark))
+ + nla_total_size(4) /* XFRM_AE_RTHR */
+ + nla_total_size(4); /* XFRM_AE_ETHR */
+}
+
+static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
+{
+ struct xfrm_aevent_id *id;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ id = nlmsg_data(nlh);
+ memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
+ id->sa_id.spi = x->id.spi;
+ id->sa_id.family = x->props.family;
+ id->sa_id.proto = x->id.proto;
+ memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
+ id->reqid = x->props.reqid;
+ id->flags = c->data.aevent;
+
+ if (x->replay_esn)
+ NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
+ xfrm_replay_state_esn_len(x->replay_esn),
+ x->replay_esn);
+ else
+ NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
+
+ NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
+
+ if (id->flags & XFRM_AE_RTHR)
+ NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
+
+ if (id->flags & XFRM_AE_ETHR)
+ NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
+ x->replay_maxage * 10 / HZ);
+
+ if (xfrm_mark_put(skb, &x->mark))
+ goto nla_put_failure;
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_state *x;
+ struct sk_buff *r_skb;
+ int err;
+ struct km_event c;
+ u32 mark;
+ struct xfrm_mark m;
+ struct xfrm_aevent_id *p = nlmsg_data(nlh);
+ struct xfrm_usersa_id *id = &p->sa_id;
+
+ mark = xfrm_mark_get(attrs, &m);
+
+ x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
+ if (x == NULL)
+ return -ESRCH;
+
+ r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
+ if (r_skb == NULL) {
+ xfrm_state_put(x);
+ return -ENOMEM;
+ }
+
+ /*
+ * 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 = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
+ spin_unlock_bh(&x->lock);
+ xfrm_state_put(x);
+ return err;
+}
+
+static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_state *x;
+ struct km_event c;
+ int err = - EINVAL;
+ u32 mark = 0;
+ struct xfrm_mark m;
+ struct xfrm_aevent_id *p = nlmsg_data(nlh);
+ struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
+ struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
+ struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
+
+ if (!lt && !rp && !re)
+ return err;
+
+ /* pedantic mode - thou shalt sayeth replaceth */
+ if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
+ return err;
+
+ mark = xfrm_mark_get(attrs, &m);
+
+ x = xfrm_state_lookup(net, mark, &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;
+
+ err = xfrm_replay_verify_len(x->replay_esn, rp);
+ if (err)
+ goto out;
+
+ spin_lock_bh(&x->lock);
+ xfrm_update_ae_params(x, attrs, 1);
+ spin_unlock_bh(&x->lock);
+
+ 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,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct km_event c;
+ u8 type = XFRM_POLICY_TYPE_MAIN;
+ int err;
+ struct xfrm_audit audit_info;
+
+ err = copy_from_user_policy_type(&type, attrs);
+ if (err)
+ return err;
+
+ audit_info.loginuid = audit_get_loginuid(current);
+ audit_info.sessionid = audit_get_sessionid(current);
+ security_task_getsecid(current, &audit_info.secid);
+ err = xfrm_policy_flush(net, type, &audit_info);
+ if (err) {
+ if (err == -ESRCH) /* empty table */
+ return 0;
+ return err;
+ }
+
+ c.data.type = type;
+ c.event = nlh->nlmsg_type;
+ c.seq = nlh->nlmsg_seq;
+ c.pid = nlh->nlmsg_pid;
+ c.net = net;
+ km_policy_notify(NULL, 0, &c);
+ return 0;
+}
+
+static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_policy *xp;
+ struct xfrm_user_polexpire *up = nlmsg_data(nlh);
+ struct xfrm_userpolicy_info *p = &up->pol;
+ u8 type = XFRM_POLICY_TYPE_MAIN;
+ int err = -ENOENT;
+ struct xfrm_mark m;
+ u32 mark = xfrm_mark_get(attrs, &m);
+
+ err = copy_from_user_policy_type(&type, attrs);
+ if (err)
+ return err;
+
+ err = verify_policy_dir(p->dir);
+ if (err)
+ return err;
+
+ if (p->index)
+ xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
+ else {
+ struct nlattr *rt = attrs[XFRMA_SEC_CTX];
+ struct xfrm_sec_ctx *ctx;
+
+ err = verify_sec_ctx_len(attrs);
+ if (err)
+ return err;
+
+ ctx = NULL;
+ if (rt) {
+ struct xfrm_user_sec_ctx *uctx = nla_data(rt);
+
+ err = security_xfrm_policy_alloc(&ctx, uctx);
+ if (err)
+ return err;
+ }
+ xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
+ &p->sel, ctx, 0, &err);
+ security_xfrm_policy_free(ctx);
+ }
+ if (xp == NULL)
+ return -ENOENT;
+
+ if (unlikely(xp->walk.dead))
+ goto out;
+
+ err = 0;
+ if (up->hard) {
+ uid_t loginuid = audit_get_loginuid(current);
+ u32 sessionid = audit_get_sessionid(current);
+ u32 sid;
+
+ security_task_getsecid(current, &sid);
+ xfrm_policy_delete(xp, p->dir);
+ xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
+
+ } else {
+ // reset the timers here?
+ WARN(1, "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,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_state *x;
+ int err;
+ struct xfrm_user_expire *ue = nlmsg_data(nlh);
+ struct xfrm_usersa_info *p = &ue->state;
+ struct xfrm_mark m;
+ u32 mark = xfrm_mark_get(attrs, &m);
+
+ x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
+
+ err = -ENOENT;
+ if (x == NULL)
+ return err;
+
+ spin_lock_bh(&x->lock);
+ err = -EINVAL;
+ if (x->km.state != XFRM_STATE_VALID)
+ goto out;
+ km_state_expired(x, ue->hard, current->pid);
+
+ if (ue->hard) {
+ uid_t loginuid = audit_get_loginuid(current);
+ u32 sessionid = audit_get_sessionid(current);
+ u32 sid;
+
+ security_task_getsecid(current, &sid);
+ __xfrm_state_delete(x);
+ xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
+ }
+ err = 0;
+out:
+ spin_unlock_bh(&x->lock);
+ xfrm_state_put(x);
+ return err;
+}
+
+static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct net *net = sock_net(skb->sk);
+ struct xfrm_policy *xp;
+ struct xfrm_user_tmpl *ut;
+ int i;
+ struct nlattr *rt = attrs[XFRMA_TMPL];
+ struct xfrm_mark mark;
+
+ struct xfrm_user_acquire *ua = nlmsg_data(nlh);
+ struct xfrm_state *x = xfrm_state_alloc(net);
+ int err = -ENOMEM;
+
+ if (!x)
+ goto nomem;
+
+ xfrm_mark_get(attrs, &mark);
+
+ err = verify_newpolicy_info(&ua->policy);
+ if (err)
+ goto bad_policy;
+
+ /* build an XP */
+ xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
+ if (!xp)
+ goto free_state;
+
+ 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));
+ xp->mark.m = x->mark.m = mark.m;
+ xp->mark.v = x->mark.v = mark.v;
+ ut = nla_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;
+
+bad_policy:
+ WARN(1, "BAD policy passed\n");
+free_state:
+ kfree(x);
+nomem:
+ return err;
+}
+
+#ifdef CONFIG_XFRM_MIGRATE
+static int copy_from_user_migrate(struct xfrm_migrate *ma,
+ struct xfrm_kmaddress *k,
+ struct nlattr **attrs, int *num)
+{
+ struct nlattr *rt = attrs[XFRMA_MIGRATE];
+ struct xfrm_user_migrate *um;
+ int i, num_migrate;
+
+ if (k != NULL) {
+ struct xfrm_user_kmaddress *uk;
+
+ uk = nla_data(attrs[XFRMA_KMADDRESS]);
+ memcpy(&k->local, &uk->local, sizeof(k->local));
+ memcpy(&k->remote, &uk->remote, sizeof(k->remote));
+ k->family = uk->family;
+ k->reserved = uk->reserved;
+ }
+
+ um = nla_data(rt);
+ num_migrate = nla_len(rt) / sizeof(*um);
+
+ if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
+ return -EINVAL;
+
+ for (i = 0; i < num_migrate; i++, um++, ma++) {
+ memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
+ memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
+ memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
+ memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
+
+ ma->proto = um->proto;
+ ma->mode = um->mode;
+ ma->reqid = um->reqid;
+
+ ma->old_family = um->old_family;
+ ma->new_family = um->new_family;
+ }
+
+ *num = i;
+ return 0;
+}
+
+static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
+ struct xfrm_migrate m[XFRM_MAX_DEPTH];
+ struct xfrm_kmaddress km, *kmp;
+ u8 type;
+ int err;
+ int n = 0;
+
+ if (attrs[XFRMA_MIGRATE] == NULL)
+ return -EINVAL;
+
+ kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
+
+ err = copy_from_user_policy_type(&type, attrs);
+ if (err)
+ return err;
+
+ err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
+ if (err)
+ return err;
+
+ if (!n)
+ return 0;
+
+ xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
+
+ return 0;
+}
+#else
+static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct nlattr **attrs)
+{
+ return -ENOPROTOOPT;
+}
+#endif
+
+#ifdef CONFIG_XFRM_MIGRATE
+static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
+{
+ struct xfrm_user_migrate um;
+
+ memset(&um, 0, sizeof(um));
+ um.proto = m->proto;
+ um.mode = m->mode;
+ um.reqid = m->reqid;
+ um.old_family = m->old_family;
+ memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
+ memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
+ um.new_family = m->new_family;
+ memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
+ memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
+
+ return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
+}
+
+static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
+{
+ struct xfrm_user_kmaddress uk;
+
+ memset(&uk, 0, sizeof(uk));
+ uk.family = k->family;
+ uk.reserved = k->reserved;
+ memcpy(&uk.local, &k->local, sizeof(uk.local));
+ memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
+
+ return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
+}
+
+static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
+{
+ return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
+ + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
+ + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
+ + userpolicy_type_attrsize();
+}
+
+static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
+ int num_migrate, const struct xfrm_kmaddress *k,
+ const struct xfrm_selector *sel, u8 dir, u8 type)
+{
+ const struct xfrm_migrate *mp;
+ struct xfrm_userpolicy_id *pol_id;
+ struct nlmsghdr *nlh;
+ int i;
+
+ nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ pol_id = nlmsg_data(nlh);
+ /* copy data from selector, dir, and type to the pol_id */
+ memset(pol_id, 0, sizeof(*pol_id));
+ memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
+ pol_id->dir = dir;
+
+ if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
+ goto nlmsg_failure;
+
+ if (copy_to_user_policy_type(type, skb) < 0)
+ goto nlmsg_failure;
+
+ for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
+ if (copy_to_user_migrate(mp, skb) < 0)
+ goto nlmsg_failure;
+ }
+
+ return nlmsg_end(skb, nlh);
+nlmsg_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
+ const struct xfrm_migrate *m, int num_migrate,
+ const struct xfrm_kmaddress *k)
+{
+ struct net *net = &init_net;
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ /* build migrate */
+ if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
+ BUG();
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
+}
+#else
+static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
+ const struct xfrm_migrate *m, int num_migrate,
+ const struct xfrm_kmaddress *k)
+{
+ return -ENOPROTOOPT;
+}
+#endif
+
+#define XMSGSIZE(type) sizeof(struct type)
+
+static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
+ [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
+ [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
+ [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
+ [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
+ [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_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
+ [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
+ [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
+ [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] = 0,
+ [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
+ [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
+ [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
+ [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
+ [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
+ [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
+};
+
+#undef XMSGSIZE
+
+static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
+ [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
+ [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
+ [XFRMA_LASTUSED] = { .type = NLA_U64},
+ [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
+ [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
+ [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
+ [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
+ [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
+ [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
+ [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
+ [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
+ [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
+ [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
+ [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
+ [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
+ [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
+ [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
+ [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
+ [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
+ [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
+ [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
+ [XFRMA_TFCPAD] = { .type = NLA_U32 },
+ [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
+};
+
+static 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 *);
+} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
+ [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
+ [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
+ [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
+ .dump = xfrm_dump_sa,
+ .done = xfrm_dump_sa_done },
+ [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
+ [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
+ [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
+ .dump = xfrm_dump_policy,
+ .done = xfrm_dump_policy_done },
+ [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 },
+ [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
+ [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
+ [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
+};
+
+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;
+ int type, err;
+
+ type = nlh->nlmsg_type;
+ if (type > XFRM_MSG_MAX)
+ return -EINVAL;
+
+ type -= XFRM_MSG_BASE;
+ link = &xfrm_dispatch[type];
+
+ /* All operations require privileges, even GET */
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
+ type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
+ (nlh->nlmsg_flags & NLM_F_DUMP)) {
+ if (link->dump == NULL)
+ return -EINVAL;
+
+ {
+ struct netlink_dump_control c = {
+ .dump = link->dump,
+ .done = link->done,
+ };
+ return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
+ }
+ }
+
+ err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
+ xfrma_policy);
+ if (err < 0)
+ return err;
+
+ if (link->doit == NULL)
+ return -EINVAL;
+
+ return link->doit(skb, nlh, attrs);
+}
+
+static void xfrm_netlink_rcv(struct sk_buff *skb)
+{
+ mutex_lock(&xfrm_cfg_mutex);
+ netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
+ mutex_unlock(&xfrm_cfg_mutex);
+}
+
+static inline size_t xfrm_expire_msgsize(void)
+{
+ return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
+ + nla_total_size(sizeof(struct xfrm_mark));
+}
+
+static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
+{
+ struct xfrm_user_expire *ue;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ ue = nlmsg_data(nlh);
+ copy_to_user_state(x, &ue->state);
+ ue->hard = (c->data.hard != 0) ? 1 : 0;
+
+ if (xfrm_mark_put(skb, &x->mark))
+ goto nla_put_failure;
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
+{
+ struct net *net = xs_net(x);
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_expire(skb, x, c) < 0) {
+ kfree_skb(skb);
+ return -EMSGSIZE;
+ }
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
+}
+
+static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
+{
+ struct net *net = xs_net(x);
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_aevent(skb, x, c) < 0)
+ BUG();
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
+}
+
+static int xfrm_notify_sa_flush(const struct km_event *c)
+{
+ struct net *net = c->net;
+ struct xfrm_usersa_flush *p;
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
+
+ skb = nlmsg_new(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
+ if (nlh == NULL) {
+ kfree_skb(skb);
+ return -EMSGSIZE;
+ }
+
+ p = nlmsg_data(nlh);
+ p->proto = c->data.proto;
+
+ nlmsg_end(skb, nlh);
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
+}
+
+static inline size_t xfrm_sa_len(struct xfrm_state *x)
+{
+ size_t l = 0;
+ if (x->aead)
+ l += nla_total_size(aead_len(x->aead));
+ if (x->aalg) {
+ l += nla_total_size(sizeof(struct xfrm_algo) +
+ (x->aalg->alg_key_len + 7) / 8);
+ l += nla_total_size(xfrm_alg_auth_len(x->aalg));
+ }
+ if (x->ealg)
+ l += nla_total_size(xfrm_alg_len(x->ealg));
+ if (x->calg)
+ l += nla_total_size(sizeof(*x->calg));
+ if (x->encap)
+ l += nla_total_size(sizeof(*x->encap));
+ if (x->tfcpad)
+ l += nla_total_size(sizeof(x->tfcpad));
+ if (x->replay_esn)
+ l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
+ if (x->security)
+ l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
+ x->security->ctx_len);
+ if (x->coaddr)
+ l += nla_total_size(sizeof(*x->coaddr));
+
+ /* Must count x->lastused as it may become non-zero behind our back. */
+ l += nla_total_size(sizeof(u64));
+
+ return l;
+}
+
+static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
+{
+ struct net *net = xs_net(x);
+ struct xfrm_usersa_info *p;
+ struct xfrm_usersa_id *id;
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ int len = xfrm_sa_len(x);
+ int headlen;
+
+ headlen = sizeof(*p);
+ if (c->event == XFRM_MSG_DELSA) {
+ len += nla_total_size(headlen);
+ headlen = sizeof(*id);
+ len += nla_total_size(sizeof(struct xfrm_mark));
+ }
+ len += NLMSG_ALIGN(headlen);
+
+ skb = nlmsg_new(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
+ if (nlh == NULL)
+ goto nla_put_failure;
+
+ p = nlmsg_data(nlh);
+ if (c->event == XFRM_MSG_DELSA) {
+ struct nlattr *attr;
+
+ id = nlmsg_data(nlh);
+ memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
+ id->spi = x->id.spi;
+ id->family = x->props.family;
+ id->proto = x->id.proto;
+
+ attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
+ if (attr == NULL)
+ goto nla_put_failure;
+
+ p = nla_data(attr);
+ }
+
+ if (copy_to_user_state_extra(x, p, skb))
+ goto nla_put_failure;
+
+ nlmsg_end(skb, nlh);
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
+
+nla_put_failure:
+ /* Somebody screwed up with xfrm_sa_len! */
+ WARN_ON(1);
+ kfree_skb(skb);
+ return -1;
+}
+
+static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
+{
+
+ 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:
+ return xfrm_notify_sa(x, c);
+ case XFRM_MSG_FLUSHSA:
+ return xfrm_notify_sa_flush(c);
+ default:
+ printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
+ c->event);
+ break;
+ }
+
+ return 0;
+
+}
+
+static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
+ struct xfrm_policy *xp)
+{
+ return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
+ + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
+ + nla_total_size(sizeof(struct xfrm_mark))
+ + nla_total_size(xfrm_user_sec_ctx_size(x->security))
+ + userpolicy_type_attrsize();
+}
+
+static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
+ struct xfrm_tmpl *xt, struct xfrm_policy *xp,
+ int dir)
+{
+ struct xfrm_user_acquire *ua;
+ struct nlmsghdr *nlh;
+ __u32 seq = xfrm_get_acqseq();
+
+ nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ ua = nlmsg_data(nlh);
+ memcpy(&ua->id, &x->id, sizeof(ua->id));
+ memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
+ memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
+ copy_to_user_policy(xp, &ua->policy, dir);
+ ua->aalgos = xt->aalgos;
+ ua->ealgos = xt->ealgos;
+ ua->calgos = xt->calgos;
+ ua->seq = x->km.seq = seq;
+
+ if (copy_to_user_tmpl(xp, skb) < 0)
+ goto nlmsg_failure;
+ if (copy_to_user_state_sec_ctx(x, skb))
+ goto nlmsg_failure;
+ if (copy_to_user_policy_type(xp->type, skb) < 0)
+ goto nlmsg_failure;
+ if (xfrm_mark_put(skb, &xp->mark))
+ goto nla_put_failure;
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+nlmsg_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
+ struct xfrm_policy *xp, int dir)
+{
+ struct net *net = xs_net(x);
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_acquire(skb, x, xt, xp, dir) < 0)
+ BUG();
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
+}
+
+/* User gives us xfrm_user_policy_info followed by an array of 0
+ * or more templates.
+ */
+static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
+ u8 *data, int len, int *dir)
+{
+ struct net *net = sock_net(sk);
+ struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
+ struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
+ struct xfrm_policy *xp;
+ int nr;
+
+ switch (sk->sk_family) {
+ case AF_INET:
+ if (opt != IP_XFRM_POLICY) {
+ *dir = -EOPNOTSUPP;
+ return NULL;
+ }
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case AF_INET6:
+ if (opt != IPV6_XFRM_POLICY) {
+ *dir = -EOPNOTSUPP;
+ return NULL;
+ }
+ break;
+#endif
+ default:
+ *dir = -EINVAL;
+ return NULL;
+ }
+
+ *dir = -EINVAL;
+
+ if (len < sizeof(*p) ||
+ verify_newpolicy_info(p))
+ return NULL;
+
+ nr = ((len - sizeof(*p)) / sizeof(*ut));
+ if (validate_tmpl(nr, ut, p->sel.family))
+ return NULL;
+
+ if (p->dir > XFRM_POLICY_OUT)
+ return NULL;
+
+ xp = xfrm_policy_alloc(net, GFP_ATOMIC);
+ if (xp == NULL) {
+ *dir = -ENOBUFS;
+ return NULL;
+ }
+
+ copy_from_user_policy(xp, p);
+ xp->type = XFRM_POLICY_TYPE_MAIN;
+ copy_templates(xp, ut, nr);
+
+ *dir = p->dir;
+
+ return xp;
+}
+
+static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
+{
+ return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
+ + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
+ + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
+ + nla_total_size(sizeof(struct xfrm_mark))
+ + userpolicy_type_attrsize();
+}
+
+static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
+ int dir, const struct km_event *c)
+{
+ struct xfrm_user_polexpire *upe;
+ struct nlmsghdr *nlh;
+ int hard = c->data.hard;
+
+ nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ upe = nlmsg_data(nlh);
+ copy_to_user_policy(xp, &upe->pol, dir);
+ if (copy_to_user_tmpl(xp, skb) < 0)
+ goto nlmsg_failure;
+ if (copy_to_user_sec_ctx(xp, skb))
+ goto nlmsg_failure;
+ if (copy_to_user_policy_type(xp->type, skb) < 0)
+ goto nlmsg_failure;
+ if (xfrm_mark_put(skb, &xp->mark))
+ goto nla_put_failure;
+ upe->hard = !!hard;
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+nlmsg_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
+{
+ struct net *net = xp_net(xp);
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_polexpire(skb, xp, dir, c) < 0)
+ BUG();
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
+}
+
+static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
+{
+ struct net *net = xp_net(xp);
+ struct xfrm_userpolicy_info *p;
+ struct xfrm_userpolicy_id *id;
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+ int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
+ int headlen;
+
+ headlen = sizeof(*p);
+ if (c->event == XFRM_MSG_DELPOLICY) {
+ len += nla_total_size(headlen);
+ headlen = sizeof(*id);
+ }
+ len += userpolicy_type_attrsize();
+ len += nla_total_size(sizeof(struct xfrm_mark));
+ len += NLMSG_ALIGN(headlen);
+
+ skb = nlmsg_new(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
+ if (nlh == NULL)
+ goto nlmsg_failure;
+
+ p = nlmsg_data(nlh);
+ if (c->event == XFRM_MSG_DELPOLICY) {
+ struct nlattr *attr;
+
+ id = nlmsg_data(nlh);
+ memset(id, 0, sizeof(*id));
+ id->dir = dir;
+ if (c->data.byid)
+ id->index = xp->index;
+ else
+ memcpy(&id->sel, &xp->selector, sizeof(id->sel));
+
+ attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
+ if (attr == NULL)
+ goto nlmsg_failure;
+
+ p = nla_data(attr);
+ }
+
+ copy_to_user_policy(xp, p, dir);
+ if (copy_to_user_tmpl(xp, skb) < 0)
+ goto nlmsg_failure;
+ if (copy_to_user_policy_type(xp->type, skb) < 0)
+ goto nlmsg_failure;
+
+ if (xfrm_mark_put(skb, &xp->mark))
+ goto nla_put_failure;
+
+ nlmsg_end(skb, nlh);
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
+
+nla_put_failure:
+nlmsg_failure:
+ kfree_skb(skb);
+ return -1;
+}
+
+static int xfrm_notify_policy_flush(const struct km_event *c)
+{
+ struct net *net = c->net;
+ struct nlmsghdr *nlh;
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
+ if (nlh == NULL)
+ goto nlmsg_failure;
+ if (copy_to_user_policy_type(c->data.type, skb) < 0)
+ goto nlmsg_failure;
+
+ nlmsg_end(skb, nlh);
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
+
+nlmsg_failure:
+ kfree_skb(skb);
+ return -1;
+}
+
+static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
+{
+
+ switch (c->event) {
+ case XFRM_MSG_NEWPOLICY:
+ case XFRM_MSG_UPDPOLICY:
+ case XFRM_MSG_DELPOLICY:
+ return xfrm_notify_policy(xp, dir, c);
+ case XFRM_MSG_FLUSHPOLICY:
+ return xfrm_notify_policy_flush(c);
+ case XFRM_MSG_POLEXPIRE:
+ return xfrm_exp_policy_notify(xp, dir, c);
+ default:
+ printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
+ c->event);
+ }
+
+ return 0;
+
+}
+
+static inline size_t xfrm_report_msgsize(void)
+{
+ return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
+}
+
+static int build_report(struct sk_buff *skb, u8 proto,
+ struct xfrm_selector *sel, xfrm_address_t *addr)
+{
+ struct xfrm_user_report *ur;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ ur = nlmsg_data(nlh);
+ ur->proto = proto;
+ memcpy(&ur->sel, sel, sizeof(ur->sel));
+
+ if (addr)
+ NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static int xfrm_send_report(struct net *net, u8 proto,
+ struct xfrm_selector *sel, xfrm_address_t *addr)
+{
+ struct sk_buff *skb;
+
+ skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_report(skb, proto, sel, addr) < 0)
+ BUG();
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
+}
+
+static inline size_t xfrm_mapping_msgsize(void)
+{
+ return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
+}
+
+static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
+ xfrm_address_t *new_saddr, __be16 new_sport)
+{
+ struct xfrm_user_mapping *um;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ um = nlmsg_data(nlh);
+
+ memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
+ um->id.spi = x->id.spi;
+ um->id.family = x->props.family;
+ um->id.proto = x->id.proto;
+ memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
+ memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
+ um->new_sport = new_sport;
+ um->old_sport = x->encap->encap_sport;
+ um->reqid = x->props.reqid;
+
+ return nlmsg_end(skb, nlh);
+}
+
+static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
+ __be16 sport)
+{
+ struct net *net = xs_net(x);
+ struct sk_buff *skb;
+
+ if (x->id.proto != IPPROTO_ESP)
+ return -EINVAL;
+
+ if (!x->encap)
+ return -EINVAL;
+
+ skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_mapping(skb, x, ipaddr, sport) < 0)
+ BUG();
+
+ return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
+}
+
+static struct xfrm_mgr netlink_mgr = {
+ .id = "netlink",
+ .notify = xfrm_send_state_notify,
+ .acquire = xfrm_send_acquire,
+ .compile_policy = xfrm_compile_policy,
+ .notify_policy = xfrm_send_policy_notify,
+ .report = xfrm_send_report,
+ .migrate = xfrm_send_migrate,
+ .new_mapping = xfrm_send_mapping,
+};
+
+static int __net_init xfrm_user_net_init(struct net *net)
+{
+ struct sock *nlsk;
+
+ nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
+ xfrm_netlink_rcv, NULL, THIS_MODULE);
+ if (nlsk == NULL)
+ return -ENOMEM;
+ net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
+ rcu_assign_pointer(net->xfrm.nlsk, nlsk);
+ return 0;
+}
+
+static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
+{
+ struct net *net;
+ list_for_each_entry(net, net_exit_list, exit_list)
+ RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
+ synchronize_net();
+ list_for_each_entry(net, net_exit_list, exit_list)
+ netlink_kernel_release(net->xfrm.nlsk_stash);
+}
+
+static struct pernet_operations xfrm_user_net_ops = {
+ .init = xfrm_user_net_init,
+ .exit_batch = xfrm_user_net_exit,
+};
+
+static int __init xfrm_user_init(void)
+{
+ int rv;
+
+ printk(KERN_INFO "Initializing XFRM netlink socket\n");
+
+ rv = register_pernet_subsys(&xfrm_user_net_ops);
+ if (rv < 0)
+ return rv;
+ rv = xfrm_register_km(&netlink_mgr);
+ if (rv < 0)
+ unregister_pernet_subsys(&xfrm_user_net_ops);
+ return rv;
+}
+
+static void __exit xfrm_user_exit(void)
+{
+ xfrm_unregister_km(&netlink_mgr);
+ unregister_pernet_subsys(&xfrm_user_net_ops);
+}
+
+module_init(xfrm_user_init);
+module_exit(xfrm_user_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
+