1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
30 #include <linux/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
34 #include <asm/unaligned.h>
36 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
38 struct nlattr *rt = attrs[type];
39 struct xfrm_algo *algp;
45 if (nla_len(rt) < xfrm_alg_len(algp))
58 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
62 static int verify_auth_trunc(struct nlattr **attrs)
64 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
65 struct xfrm_algo_auth *algp;
71 if (nla_len(rt) < xfrm_alg_auth_len(algp))
74 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
78 static int verify_aead(struct nlattr **attrs)
80 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
81 struct xfrm_algo_aead *algp;
87 if (nla_len(rt) < aead_len(algp))
90 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
94 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
97 struct nlattr *rt = attrs[type];
100 *addrp = nla_data(rt);
103 static inline int verify_sec_ctx_len(struct nlattr **attrs)
105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
106 struct xfrm_user_sec_ctx *uctx;
112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
118 static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
122 struct xfrm_replay_state_esn *rs;
124 if (p->flags & XFRM_STATE_ESN) {
130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
133 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
134 nla_len(rt) != sizeof(*rs))
141 /* As only ESP and AH support ESN feature. */
142 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
145 if (p->replay_window != 0)
151 static int verify_newsa_info(struct xfrm_usersa_info *p,
152 struct nlattr **attrs)
162 #if IS_ENABLED(CONFIG_IPV6)
174 switch (p->id.proto) {
176 if ((!attrs[XFRMA_ALG_AUTH] &&
177 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
178 attrs[XFRMA_ALG_AEAD] ||
179 attrs[XFRMA_ALG_CRYPT] ||
180 attrs[XFRMA_ALG_COMP] ||
186 if (attrs[XFRMA_ALG_COMP])
188 if (!attrs[XFRMA_ALG_AUTH] &&
189 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
190 !attrs[XFRMA_ALG_CRYPT] &&
191 !attrs[XFRMA_ALG_AEAD])
193 if ((attrs[XFRMA_ALG_AUTH] ||
194 attrs[XFRMA_ALG_AUTH_TRUNC] ||
195 attrs[XFRMA_ALG_CRYPT]) &&
196 attrs[XFRMA_ALG_AEAD])
198 if (attrs[XFRMA_TFCPAD] &&
199 p->mode != XFRM_MODE_TUNNEL)
204 if (!attrs[XFRMA_ALG_COMP] ||
205 attrs[XFRMA_ALG_AEAD] ||
206 attrs[XFRMA_ALG_AUTH] ||
207 attrs[XFRMA_ALG_AUTH_TRUNC] ||
208 attrs[XFRMA_ALG_CRYPT] ||
209 attrs[XFRMA_TFCPAD] ||
210 (ntohl(p->id.spi) >= 0x10000))
214 #if IS_ENABLED(CONFIG_IPV6)
215 case IPPROTO_DSTOPTS:
216 case IPPROTO_ROUTING:
217 if (attrs[XFRMA_ALG_COMP] ||
218 attrs[XFRMA_ALG_AUTH] ||
219 attrs[XFRMA_ALG_AUTH_TRUNC] ||
220 attrs[XFRMA_ALG_AEAD] ||
221 attrs[XFRMA_ALG_CRYPT] ||
222 attrs[XFRMA_ENCAP] ||
223 attrs[XFRMA_SEC_CTX] ||
224 attrs[XFRMA_TFCPAD] ||
225 !attrs[XFRMA_COADDR])
234 if ((err = verify_aead(attrs)))
236 if ((err = verify_auth_trunc(attrs)))
238 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
240 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
242 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
244 if ((err = verify_sec_ctx_len(attrs)))
246 if ((err = verify_replay(p, attrs)))
251 case XFRM_MODE_TRANSPORT:
252 case XFRM_MODE_TUNNEL:
253 case XFRM_MODE_ROUTEOPTIMIZATION:
267 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
268 struct xfrm_algo_desc *(*get_byname)(const char *, int),
271 struct xfrm_algo *p, *ualg;
272 struct xfrm_algo_desc *algo;
277 ualg = nla_data(rta);
279 algo = get_byname(ualg->alg_name, 1);
282 *props = algo->desc.sadb_alg_id;
284 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
288 strcpy(p->alg_name, algo->name);
293 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
295 struct xfrm_algo *p, *ualg;
296 struct xfrm_algo_desc *algo;
301 ualg = nla_data(rta);
303 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
306 x->props.ealgo = algo->desc.sadb_alg_id;
308 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
312 strcpy(p->alg_name, algo->name);
314 x->geniv = algo->uinfo.encr.geniv;
318 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
321 struct xfrm_algo *ualg;
322 struct xfrm_algo_auth *p;
323 struct xfrm_algo_desc *algo;
328 ualg = nla_data(rta);
330 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
333 *props = algo->desc.sadb_alg_id;
335 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
339 strcpy(p->alg_name, algo->name);
340 p->alg_key_len = ualg->alg_key_len;
341 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
342 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
348 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
351 struct xfrm_algo_auth *p, *ualg;
352 struct xfrm_algo_desc *algo;
357 ualg = nla_data(rta);
359 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
362 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
364 *props = algo->desc.sadb_alg_id;
366 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
370 strcpy(p->alg_name, algo->name);
371 if (!p->alg_trunc_len)
372 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
378 static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
380 struct xfrm_algo_aead *p, *ualg;
381 struct xfrm_algo_desc *algo;
386 ualg = nla_data(rta);
388 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
391 x->props.ealgo = algo->desc.sadb_alg_id;
393 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
397 strcpy(p->alg_name, algo->name);
399 x->geniv = algo->uinfo.aead.geniv;
403 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
406 struct xfrm_replay_state_esn *up;
409 if (!replay_esn || !rp)
413 ulen = xfrm_replay_state_esn_len(up);
415 /* Check the overall length and the internal bitmap length to avoid
416 * potential overflow. */
417 if (nla_len(rp) < ulen ||
418 xfrm_replay_state_esn_len(replay_esn) != ulen ||
419 replay_esn->bmp_len != up->bmp_len)
422 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
428 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
429 struct xfrm_replay_state_esn **preplay_esn,
432 struct xfrm_replay_state_esn *p, *pp, *up;
439 klen = xfrm_replay_state_esn_len(up);
440 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
442 p = kzalloc(klen, GFP_KERNEL);
446 pp = kzalloc(klen, GFP_KERNEL);
453 memcpy(pp, up, ulen);
461 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
466 len += sizeof(struct xfrm_user_sec_ctx);
467 len += xfrm_ctx->ctx_len;
472 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
474 memcpy(&x->id, &p->id, sizeof(x->id));
475 memcpy(&x->sel, &p->sel, sizeof(x->sel));
476 memcpy(&x->lft, &p->lft, sizeof(x->lft));
477 x->props.mode = p->mode;
478 x->props.replay_window = min_t(unsigned int, p->replay_window,
479 sizeof(x->replay.bitmap) * 8);
480 x->props.reqid = p->reqid;
481 x->props.family = p->family;
482 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
483 x->props.flags = p->flags;
485 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
486 x->sel.family = p->family;
490 * someday when pfkey also has support, we could have the code
491 * somehow made shareable and move it to xfrm_state.c - JHS
494 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
497 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
498 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
499 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
500 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
501 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
504 struct xfrm_replay_state_esn *replay_esn;
505 replay_esn = nla_data(re);
506 memcpy(x->replay_esn, replay_esn,
507 xfrm_replay_state_esn_len(replay_esn));
508 memcpy(x->preplay_esn, replay_esn,
509 xfrm_replay_state_esn_len(replay_esn));
513 struct xfrm_replay_state *replay;
514 replay = nla_data(rp);
515 memcpy(&x->replay, replay, sizeof(*replay));
516 memcpy(&x->preplay, replay, sizeof(*replay));
520 struct xfrm_lifetime_cur *ltime;
521 ltime = nla_data(lt);
522 x->curlft.bytes = ltime->bytes;
523 x->curlft.packets = ltime->packets;
524 x->curlft.add_time = ltime->add_time;
525 x->curlft.use_time = ltime->use_time;
529 x->replay_maxage = nla_get_u32(et);
532 x->replay_maxdiff = nla_get_u32(rt);
535 static struct xfrm_state *xfrm_state_construct(struct net *net,
536 struct xfrm_usersa_info *p,
537 struct nlattr **attrs,
540 struct xfrm_state *x = xfrm_state_alloc(net);
546 copy_from_user_state(x, p);
548 if (attrs[XFRMA_SA_EXTRA_FLAGS])
549 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
551 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
553 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
554 attrs[XFRMA_ALG_AUTH_TRUNC])))
556 if (!x->props.aalgo) {
557 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
558 attrs[XFRMA_ALG_AUTH])))
561 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
563 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
564 xfrm_calg_get_byname,
565 attrs[XFRMA_ALG_COMP])))
568 if (attrs[XFRMA_ENCAP]) {
569 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
570 sizeof(*x->encap), GFP_KERNEL);
571 if (x->encap == NULL)
575 if (attrs[XFRMA_TFCPAD])
576 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
578 if (attrs[XFRMA_COADDR]) {
579 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
580 sizeof(*x->coaddr), GFP_KERNEL);
581 if (x->coaddr == NULL)
585 xfrm_mark_get(attrs, &x->mark);
587 err = __xfrm_init_state(x, false);
591 if (attrs[XFRMA_SEC_CTX]) {
592 err = security_xfrm_state_alloc(x,
593 nla_data(attrs[XFRMA_SEC_CTX]));
598 if (attrs[XFRMA_OFFLOAD_DEV]) {
599 err = xfrm_dev_state_add(net, x,
600 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
605 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
606 attrs[XFRMA_REPLAY_ESN_VAL])))
610 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
611 /* sysctl_xfrm_aevent_etime is in 100ms units */
612 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
614 if ((err = xfrm_init_replay(x)))
617 /* override default values from above */
618 xfrm_update_ae_params(x, attrs, 0);
623 x->km.state = XFRM_STATE_DEAD;
630 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
631 struct nlattr **attrs)
633 struct net *net = sock_net(skb->sk);
634 struct xfrm_usersa_info *p = nlmsg_data(nlh);
635 struct xfrm_state *x;
639 err = verify_newsa_info(p, attrs);
643 x = xfrm_state_construct(net, p, attrs, &err);
648 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
649 err = xfrm_state_add(x);
651 err = xfrm_state_update(x);
653 xfrm_audit_state_add(x, err ? 0 : 1, true);
656 x->km.state = XFRM_STATE_DEAD;
661 c.seq = nlh->nlmsg_seq;
662 c.portid = nlh->nlmsg_pid;
663 c.event = nlh->nlmsg_type;
665 km_state_notify(x, &c);
671 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
672 struct xfrm_usersa_id *p,
673 struct nlattr **attrs,
676 struct xfrm_state *x = NULL;
679 u32 mark = xfrm_mark_get(attrs, &m);
681 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
683 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
685 xfrm_address_t *saddr = NULL;
687 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
694 x = xfrm_state_lookup_byaddr(net, mark,
696 p->proto, p->family);
705 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
706 struct nlattr **attrs)
708 struct net *net = sock_net(skb->sk);
709 struct xfrm_state *x;
712 struct xfrm_usersa_id *p = nlmsg_data(nlh);
714 x = xfrm_user_state_lookup(net, p, attrs, &err);
718 if ((err = security_xfrm_state_delete(x)) != 0)
721 if (xfrm_state_kern(x)) {
726 err = xfrm_state_delete(x);
731 c.seq = nlh->nlmsg_seq;
732 c.portid = nlh->nlmsg_pid;
733 c.event = nlh->nlmsg_type;
734 km_state_notify(x, &c);
737 xfrm_audit_state_delete(x, err ? 0 : 1, true);
742 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
744 memset(p, 0, sizeof(*p));
745 memcpy(&p->id, &x->id, sizeof(p->id));
746 memcpy(&p->sel, &x->sel, sizeof(p->sel));
747 memcpy(&p->lft, &x->lft, sizeof(p->lft));
748 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
749 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
750 put_unaligned(x->stats.replay, &p->stats.replay);
751 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
752 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
753 p->mode = x->props.mode;
754 p->replay_window = x->props.replay_window;
755 p->reqid = x->props.reqid;
756 p->family = x->props.family;
757 p->flags = x->props.flags;
761 struct xfrm_dump_info {
762 struct sk_buff *in_skb;
763 struct sk_buff *out_skb;
768 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
770 struct xfrm_user_sec_ctx *uctx;
772 int ctx_size = sizeof(*uctx) + s->ctx_len;
774 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
778 uctx = nla_data(attr);
779 uctx->exttype = XFRMA_SEC_CTX;
780 uctx->len = ctx_size;
781 uctx->ctx_doi = s->ctx_doi;
782 uctx->ctx_alg = s->ctx_alg;
783 uctx->ctx_len = s->ctx_len;
784 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
789 static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
791 struct xfrm_user_offload *xuo;
794 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
798 xuo = nla_data(attr);
800 xuo->ifindex = xso->dev->ifindex;
801 xuo->flags = xso->flags;
806 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
808 struct xfrm_algo *algo;
811 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
812 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
816 algo = nla_data(nla);
817 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
818 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
819 algo->alg_key_len = auth->alg_key_len;
824 /* Don't change this without updating xfrm_sa_len! */
825 static int copy_to_user_state_extra(struct xfrm_state *x,
826 struct xfrm_usersa_info *p,
831 copy_to_user_state(x, p);
833 if (x->props.extra_flags) {
834 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
835 x->props.extra_flags);
841 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
846 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
852 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
857 ret = copy_to_user_auth(x->aalg, skb);
859 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
860 xfrm_alg_auth_len(x->aalg), x->aalg);
865 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
870 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
875 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
880 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
884 ret = xfrm_mark_put(skb, &x->mark);
888 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
889 xfrm_replay_state_esn_len(x->replay_esn),
892 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
897 ret = copy_user_offload(&x->xso, skb);
901 ret = copy_sec_ctx(x->security, skb);
906 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
908 struct xfrm_dump_info *sp = ptr;
909 struct sk_buff *in_skb = sp->in_skb;
910 struct sk_buff *skb = sp->out_skb;
911 struct xfrm_usersa_info *p;
912 struct nlmsghdr *nlh;
915 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
916 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
922 err = copy_to_user_state_extra(x, p, skb);
924 nlmsg_cancel(skb, nlh);
931 static int xfrm_dump_sa_done(struct netlink_callback *cb)
933 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
934 struct sock *sk = cb->skb->sk;
935 struct net *net = sock_net(sk);
938 xfrm_state_walk_done(walk, net);
942 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
943 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
945 struct net *net = sock_net(skb->sk);
946 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
947 struct xfrm_dump_info info;
949 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
950 sizeof(cb->args) - sizeof(cb->args[0]));
952 info.in_skb = cb->skb;
954 info.nlmsg_seq = cb->nlh->nlmsg_seq;
955 info.nlmsg_flags = NLM_F_MULTI;
958 struct nlattr *attrs[XFRMA_MAX+1];
959 struct xfrm_address_filter *filter = NULL;
963 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
968 if (attrs[XFRMA_ADDRESS_FILTER]) {
969 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
970 sizeof(*filter), GFP_KERNEL);
975 if (attrs[XFRMA_PROTO])
976 proto = nla_get_u8(attrs[XFRMA_PROTO]);
978 xfrm_state_walk_init(walk, proto, filter);
982 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
987 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
988 struct xfrm_state *x, u32 seq)
990 struct xfrm_dump_info info;
994 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
996 return ERR_PTR(-ENOMEM);
998 info.in_skb = in_skb;
1000 info.nlmsg_seq = seq;
1001 info.nlmsg_flags = 0;
1003 err = dump_one_state(x, 0, &info);
1006 return ERR_PTR(err);
1012 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1013 * Must be called with RCU read lock.
1015 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1016 u32 pid, unsigned int group)
1018 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1021 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1026 static inline size_t xfrm_spdinfo_msgsize(void)
1028 return NLMSG_ALIGN(4)
1029 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1030 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1031 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1032 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1035 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1036 u32 portid, u32 seq, u32 flags)
1038 struct xfrmk_spdinfo si;
1039 struct xfrmu_spdinfo spc;
1040 struct xfrmu_spdhinfo sph;
1041 struct xfrmu_spdhthresh spt4, spt6;
1042 struct nlmsghdr *nlh;
1047 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1048 if (nlh == NULL) /* shouldn't really happen ... */
1051 f = nlmsg_data(nlh);
1053 xfrm_spd_getinfo(net, &si);
1054 spc.incnt = si.incnt;
1055 spc.outcnt = si.outcnt;
1056 spc.fwdcnt = si.fwdcnt;
1057 spc.inscnt = si.inscnt;
1058 spc.outscnt = si.outscnt;
1059 spc.fwdscnt = si.fwdscnt;
1060 sph.spdhcnt = si.spdhcnt;
1061 sph.spdhmcnt = si.spdhmcnt;
1064 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1066 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1067 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1068 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1069 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1070 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1072 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1074 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1076 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1078 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1080 nlmsg_cancel(skb, nlh);
1084 nlmsg_end(skb, nlh);
1088 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1089 struct nlattr **attrs)
1091 struct net *net = sock_net(skb->sk);
1092 struct xfrmu_spdhthresh *thresh4 = NULL;
1093 struct xfrmu_spdhthresh *thresh6 = NULL;
1095 /* selector prefixlen thresholds to hash policies */
1096 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1097 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1099 if (nla_len(rta) < sizeof(*thresh4))
1101 thresh4 = nla_data(rta);
1102 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1105 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1106 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1108 if (nla_len(rta) < sizeof(*thresh6))
1110 thresh6 = nla_data(rta);
1111 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1115 if (thresh4 || thresh6) {
1116 write_seqlock(&net->xfrm.policy_hthresh.lock);
1118 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1119 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1122 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1123 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1125 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1127 xfrm_policy_hash_rebuild(net);
1133 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1134 struct nlattr **attrs)
1136 struct net *net = sock_net(skb->sk);
1137 struct sk_buff *r_skb;
1138 u32 *flags = nlmsg_data(nlh);
1139 u32 sportid = NETLINK_CB(skb).portid;
1140 u32 seq = nlh->nlmsg_seq;
1142 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1146 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
1149 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1152 static inline size_t xfrm_sadinfo_msgsize(void)
1154 return NLMSG_ALIGN(4)
1155 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1156 + nla_total_size(4); /* XFRMA_SAD_CNT */
1159 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1160 u32 portid, u32 seq, u32 flags)
1162 struct xfrmk_sadinfo si;
1163 struct xfrmu_sadhinfo sh;
1164 struct nlmsghdr *nlh;
1168 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1169 if (nlh == NULL) /* shouldn't really happen ... */
1172 f = nlmsg_data(nlh);
1174 xfrm_sad_getinfo(net, &si);
1176 sh.sadhmcnt = si.sadhmcnt;
1177 sh.sadhcnt = si.sadhcnt;
1179 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1181 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1183 nlmsg_cancel(skb, nlh);
1187 nlmsg_end(skb, nlh);
1191 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1192 struct nlattr **attrs)
1194 struct net *net = sock_net(skb->sk);
1195 struct sk_buff *r_skb;
1196 u32 *flags = nlmsg_data(nlh);
1197 u32 sportid = NETLINK_CB(skb).portid;
1198 u32 seq = nlh->nlmsg_seq;
1200 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1204 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
1207 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1210 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1211 struct nlattr **attrs)
1213 struct net *net = sock_net(skb->sk);
1214 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1215 struct xfrm_state *x;
1216 struct sk_buff *resp_skb;
1219 x = xfrm_user_state_lookup(net, p, attrs, &err);
1223 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1224 if (IS_ERR(resp_skb)) {
1225 err = PTR_ERR(resp_skb);
1227 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1234 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1235 struct nlattr **attrs)
1237 struct net *net = sock_net(skb->sk);
1238 struct xfrm_state *x;
1239 struct xfrm_userspi_info *p;
1240 struct sk_buff *resp_skb;
1241 xfrm_address_t *daddr;
1247 p = nlmsg_data(nlh);
1248 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1252 family = p->info.family;
1253 daddr = &p->info.id.daddr;
1257 mark = xfrm_mark_get(attrs, &m);
1259 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1260 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1267 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1268 p->info.id.proto, daddr,
1275 err = xfrm_alloc_spi(x, p->min, p->max);
1279 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1280 if (IS_ERR(resp_skb)) {
1281 err = PTR_ERR(resp_skb);
1285 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1293 static int verify_policy_dir(u8 dir)
1296 case XFRM_POLICY_IN:
1297 case XFRM_POLICY_OUT:
1298 case XFRM_POLICY_FWD:
1308 static int verify_policy_type(u8 type)
1311 case XFRM_POLICY_TYPE_MAIN:
1312 #ifdef CONFIG_XFRM_SUB_POLICY
1313 case XFRM_POLICY_TYPE_SUB:
1324 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1329 case XFRM_SHARE_ANY:
1330 case XFRM_SHARE_SESSION:
1331 case XFRM_SHARE_USER:
1332 case XFRM_SHARE_UNIQUE:
1339 switch (p->action) {
1340 case XFRM_POLICY_ALLOW:
1341 case XFRM_POLICY_BLOCK:
1348 switch (p->sel.family) {
1353 #if IS_ENABLED(CONFIG_IPV6)
1356 return -EAFNOSUPPORT;
1363 ret = verify_policy_dir(p->dir);
1366 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1372 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1374 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1375 struct xfrm_user_sec_ctx *uctx;
1380 uctx = nla_data(rt);
1381 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1384 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1390 for (i = 0; i < nr; i++, ut++) {
1391 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1393 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1394 memcpy(&t->saddr, &ut->saddr,
1395 sizeof(xfrm_address_t));
1396 t->reqid = ut->reqid;
1398 t->share = ut->share;
1399 t->optional = ut->optional;
1400 t->aalgos = ut->aalgos;
1401 t->ealgos = ut->ealgos;
1402 t->calgos = ut->calgos;
1403 /* If all masks are ~0, then we allow all algorithms. */
1404 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1405 t->encap_family = ut->family;
1409 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1413 if (nr > XFRM_MAX_DEPTH)
1416 for (i = 0; i < nr; i++) {
1417 /* We never validated the ut->family value, so many
1418 * applications simply leave it at zero. The check was
1419 * never made and ut->family was ignored because all
1420 * templates could be assumed to have the same family as
1421 * the policy itself. Now that we will have ipv4-in-ipv6
1422 * and ipv6-in-ipv4 tunnels, this is no longer true.
1425 ut[i].family = family;
1427 switch (ut[i].family) {
1430 #if IS_ENABLED(CONFIG_IPV6)
1442 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1444 struct nlattr *rt = attrs[XFRMA_TMPL];
1449 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1450 int nr = nla_len(rt) / sizeof(*utmpl);
1453 err = validate_tmpl(nr, utmpl, pol->family);
1457 copy_templates(pol, utmpl, nr);
1462 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1464 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1465 struct xfrm_userpolicy_type *upt;
1466 u8 type = XFRM_POLICY_TYPE_MAIN;
1474 err = verify_policy_type(type);
1482 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1484 xp->priority = p->priority;
1485 xp->index = p->index;
1486 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1487 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1488 xp->action = p->action;
1489 xp->flags = p->flags;
1490 xp->family = p->sel.family;
1491 /* XXX xp->share = p->share; */
1494 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1496 memset(p, 0, sizeof(*p));
1497 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1498 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1499 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1500 p->priority = xp->priority;
1501 p->index = xp->index;
1502 p->sel.family = xp->family;
1504 p->action = xp->action;
1505 p->flags = xp->flags;
1506 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1509 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1511 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1519 copy_from_user_policy(xp, p);
1521 err = copy_from_user_policy_type(&xp->type, attrs);
1525 if (!(err = copy_from_user_tmpl(xp, attrs)))
1526 err = copy_from_user_sec_ctx(xp, attrs);
1530 xfrm_mark_get(attrs, &xp->mark);
1536 xfrm_policy_destroy(xp);
1540 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1541 struct nlattr **attrs)
1543 struct net *net = sock_net(skb->sk);
1544 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1545 struct xfrm_policy *xp;
1550 err = verify_newpolicy_info(p);
1553 err = verify_sec_ctx_len(attrs);
1557 xp = xfrm_policy_construct(net, p, attrs, &err);
1561 /* shouldn't excl be based on nlh flags??
1562 * Aha! this is anti-netlink really i.e more pfkey derived
1563 * in netlink excl is a flag and you wouldnt need
1564 * a type XFRM_MSG_UPDPOLICY - JHS */
1565 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1566 err = xfrm_policy_insert(p->dir, xp, excl);
1567 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1570 security_xfrm_policy_free(xp->security);
1575 c.event = nlh->nlmsg_type;
1576 c.seq = nlh->nlmsg_seq;
1577 c.portid = nlh->nlmsg_pid;
1578 km_policy_notify(xp, p->dir, &c);
1585 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1587 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1590 if (xp->xfrm_nr == 0)
1593 for (i = 0; i < xp->xfrm_nr; i++) {
1594 struct xfrm_user_tmpl *up = &vec[i];
1595 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1597 memset(up, 0, sizeof(*up));
1598 memcpy(&up->id, &kp->id, sizeof(up->id));
1599 up->family = kp->encap_family;
1600 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1601 up->reqid = kp->reqid;
1602 up->mode = kp->mode;
1603 up->share = kp->share;
1604 up->optional = kp->optional;
1605 up->aalgos = kp->aalgos;
1606 up->ealgos = kp->ealgos;
1607 up->calgos = kp->calgos;
1610 return nla_put(skb, XFRMA_TMPL,
1611 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1614 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1617 return copy_sec_ctx(x->security, skb);
1622 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1625 return copy_sec_ctx(xp->security, skb);
1628 static inline size_t userpolicy_type_attrsize(void)
1630 #ifdef CONFIG_XFRM_SUB_POLICY
1631 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1637 #ifdef CONFIG_XFRM_SUB_POLICY
1638 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1640 struct xfrm_userpolicy_type upt = {
1644 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1648 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1654 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1656 struct xfrm_dump_info *sp = ptr;
1657 struct xfrm_userpolicy_info *p;
1658 struct sk_buff *in_skb = sp->in_skb;
1659 struct sk_buff *skb = sp->out_skb;
1660 struct nlmsghdr *nlh;
1663 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1664 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1668 p = nlmsg_data(nlh);
1669 copy_to_user_policy(xp, p, dir);
1670 err = copy_to_user_tmpl(xp, skb);
1672 err = copy_to_user_sec_ctx(xp, skb);
1674 err = copy_to_user_policy_type(xp->type, skb);
1676 err = xfrm_mark_put(skb, &xp->mark);
1678 nlmsg_cancel(skb, nlh);
1681 nlmsg_end(skb, nlh);
1685 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1687 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1688 struct net *net = sock_net(cb->skb->sk);
1690 xfrm_policy_walk_done(walk, net);
1694 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1696 struct net *net = sock_net(skb->sk);
1697 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1698 struct xfrm_dump_info info;
1700 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1701 sizeof(cb->args) - sizeof(cb->args[0]));
1703 info.in_skb = cb->skb;
1705 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1706 info.nlmsg_flags = NLM_F_MULTI;
1710 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1713 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1718 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1719 struct xfrm_policy *xp,
1722 struct xfrm_dump_info info;
1723 struct sk_buff *skb;
1726 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1728 return ERR_PTR(-ENOMEM);
1730 info.in_skb = in_skb;
1732 info.nlmsg_seq = seq;
1733 info.nlmsg_flags = 0;
1735 err = dump_one_policy(xp, dir, 0, &info);
1738 return ERR_PTR(err);
1744 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1745 struct nlattr **attrs)
1747 struct net *net = sock_net(skb->sk);
1748 struct xfrm_policy *xp;
1749 struct xfrm_userpolicy_id *p;
1750 u8 type = XFRM_POLICY_TYPE_MAIN;
1755 u32 mark = xfrm_mark_get(attrs, &m);
1757 p = nlmsg_data(nlh);
1758 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1760 err = copy_from_user_policy_type(&type, attrs);
1764 err = verify_policy_dir(p->dir);
1769 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1771 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1772 struct xfrm_sec_ctx *ctx;
1774 err = verify_sec_ctx_len(attrs);
1780 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1782 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1786 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1788 security_xfrm_policy_free(ctx);
1794 struct sk_buff *resp_skb;
1796 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1797 if (IS_ERR(resp_skb)) {
1798 err = PTR_ERR(resp_skb);
1800 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1801 NETLINK_CB(skb).portid);
1804 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1809 c.data.byid = p->index;
1810 c.event = nlh->nlmsg_type;
1811 c.seq = nlh->nlmsg_seq;
1812 c.portid = nlh->nlmsg_pid;
1813 km_policy_notify(xp, p->dir, &c);
1818 if (delete && err == 0)
1819 xfrm_garbage_collect(net);
1823 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1824 struct nlattr **attrs)
1826 struct net *net = sock_net(skb->sk);
1828 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1831 err = xfrm_state_flush(net, p->proto, true);
1833 if (err == -ESRCH) /* empty table */
1837 c.data.proto = p->proto;
1838 c.event = nlh->nlmsg_type;
1839 c.seq = nlh->nlmsg_seq;
1840 c.portid = nlh->nlmsg_pid;
1842 km_state_notify(NULL, &c);
1847 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1849 size_t replay_size = x->replay_esn ?
1850 xfrm_replay_state_esn_len(x->replay_esn) :
1851 sizeof(struct xfrm_replay_state);
1853 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1854 + nla_total_size(replay_size)
1855 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1856 + nla_total_size(sizeof(struct xfrm_mark))
1857 + nla_total_size(4) /* XFRM_AE_RTHR */
1858 + nla_total_size(4); /* XFRM_AE_ETHR */
1861 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1863 struct xfrm_aevent_id *id;
1864 struct nlmsghdr *nlh;
1867 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1871 id = nlmsg_data(nlh);
1872 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1873 id->sa_id.spi = x->id.spi;
1874 id->sa_id.family = x->props.family;
1875 id->sa_id.proto = x->id.proto;
1876 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1877 id->reqid = x->props.reqid;
1878 id->flags = c->data.aevent;
1880 if (x->replay_esn) {
1881 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1882 xfrm_replay_state_esn_len(x->replay_esn),
1885 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1890 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1895 if (id->flags & XFRM_AE_RTHR) {
1896 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1900 if (id->flags & XFRM_AE_ETHR) {
1901 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1902 x->replay_maxage * 10 / HZ);
1906 err = xfrm_mark_put(skb, &x->mark);
1910 nlmsg_end(skb, nlh);
1914 nlmsg_cancel(skb, nlh);
1918 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1919 struct nlattr **attrs)
1921 struct net *net = sock_net(skb->sk);
1922 struct xfrm_state *x;
1923 struct sk_buff *r_skb;
1928 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1929 struct xfrm_usersa_id *id = &p->sa_id;
1931 mark = xfrm_mark_get(attrs, &m);
1933 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1937 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1938 if (r_skb == NULL) {
1944 * XXX: is this lock really needed - none of the other
1945 * gets lock (the concern is things getting updated
1946 * while we are still reading) - jhs
1948 spin_lock_bh(&x->lock);
1949 c.data.aevent = p->flags;
1950 c.seq = nlh->nlmsg_seq;
1951 c.portid = nlh->nlmsg_pid;
1953 if (build_aevent(r_skb, x, &c) < 0)
1955 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
1956 spin_unlock_bh(&x->lock);
1961 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1962 struct nlattr **attrs)
1964 struct net *net = sock_net(skb->sk);
1965 struct xfrm_state *x;
1970 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1971 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1972 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1973 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1974 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
1975 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
1977 if (!lt && !rp && !re && !et && !rt)
1980 /* pedantic mode - thou shalt sayeth replaceth */
1981 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1984 mark = xfrm_mark_get(attrs, &m);
1986 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1990 if (x->km.state != XFRM_STATE_VALID)
1993 err = xfrm_replay_verify_len(x->replay_esn, re);
1997 spin_lock_bh(&x->lock);
1998 xfrm_update_ae_params(x, attrs, 1);
1999 spin_unlock_bh(&x->lock);
2001 c.event = nlh->nlmsg_type;
2002 c.seq = nlh->nlmsg_seq;
2003 c.portid = nlh->nlmsg_pid;
2004 c.data.aevent = XFRM_AE_CU;
2005 km_state_notify(x, &c);
2012 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2013 struct nlattr **attrs)
2015 struct net *net = sock_net(skb->sk);
2017 u8 type = XFRM_POLICY_TYPE_MAIN;
2020 err = copy_from_user_policy_type(&type, attrs);
2024 err = xfrm_policy_flush(net, type, true);
2026 if (err == -ESRCH) /* empty table */
2032 c.event = nlh->nlmsg_type;
2033 c.seq = nlh->nlmsg_seq;
2034 c.portid = nlh->nlmsg_pid;
2036 km_policy_notify(NULL, 0, &c);
2040 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2041 struct nlattr **attrs)
2043 struct net *net = sock_net(skb->sk);
2044 struct xfrm_policy *xp;
2045 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2046 struct xfrm_userpolicy_info *p = &up->pol;
2047 u8 type = XFRM_POLICY_TYPE_MAIN;
2050 u32 mark = xfrm_mark_get(attrs, &m);
2052 err = copy_from_user_policy_type(&type, attrs);
2056 err = verify_policy_dir(p->dir);
2061 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
2063 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2064 struct xfrm_sec_ctx *ctx;
2066 err = verify_sec_ctx_len(attrs);
2072 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2074 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2078 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
2079 &p->sel, ctx, 0, &err);
2080 security_xfrm_policy_free(ctx);
2085 if (unlikely(xp->walk.dead))
2090 xfrm_policy_delete(xp, p->dir);
2091 xfrm_audit_policy_delete(xp, 1, true);
2093 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2100 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2101 struct nlattr **attrs)
2103 struct net *net = sock_net(skb->sk);
2104 struct xfrm_state *x;
2106 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2107 struct xfrm_usersa_info *p = &ue->state;
2109 u32 mark = xfrm_mark_get(attrs, &m);
2111 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2117 spin_lock_bh(&x->lock);
2119 if (x->km.state != XFRM_STATE_VALID)
2121 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2124 __xfrm_state_delete(x);
2125 xfrm_audit_state_delete(x, 1, true);
2129 spin_unlock_bh(&x->lock);
2134 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2135 struct nlattr **attrs)
2137 struct net *net = sock_net(skb->sk);
2138 struct xfrm_policy *xp;
2139 struct xfrm_user_tmpl *ut;
2141 struct nlattr *rt = attrs[XFRMA_TMPL];
2142 struct xfrm_mark mark;
2144 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2145 struct xfrm_state *x = xfrm_state_alloc(net);
2151 xfrm_mark_get(attrs, &mark);
2153 err = verify_newpolicy_info(&ua->policy);
2158 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2162 memcpy(&x->id, &ua->id, sizeof(ua->id));
2163 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2164 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2165 xp->mark.m = x->mark.m = mark.m;
2166 xp->mark.v = x->mark.v = mark.v;
2168 /* extract the templates and for each call km_key */
2169 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2170 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2171 memcpy(&x->id, &t->id, sizeof(x->id));
2172 x->props.mode = t->mode;
2173 x->props.reqid = t->reqid;
2174 x->props.family = ut->family;
2175 t->aalgos = ua->aalgos;
2176 t->ealgos = ua->ealgos;
2177 t->calgos = ua->calgos;
2178 err = km_query(x, t, xp);
2193 #ifdef CONFIG_XFRM_MIGRATE
2194 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2195 struct xfrm_kmaddress *k,
2196 struct nlattr **attrs, int *num)
2198 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2199 struct xfrm_user_migrate *um;
2203 struct xfrm_user_kmaddress *uk;
2205 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2206 memcpy(&k->local, &uk->local, sizeof(k->local));
2207 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2208 k->family = uk->family;
2209 k->reserved = uk->reserved;
2213 num_migrate = nla_len(rt) / sizeof(*um);
2215 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2218 for (i = 0; i < num_migrate; i++, um++, ma++) {
2219 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2220 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2221 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2222 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2224 ma->proto = um->proto;
2225 ma->mode = um->mode;
2226 ma->reqid = um->reqid;
2228 ma->old_family = um->old_family;
2229 ma->new_family = um->new_family;
2236 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2237 struct nlattr **attrs)
2239 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2240 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2241 struct xfrm_kmaddress km, *kmp;
2245 struct net *net = sock_net(skb->sk);
2247 if (attrs[XFRMA_MIGRATE] == NULL)
2250 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2252 err = copy_from_user_policy_type(&type, attrs);
2256 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2263 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
2268 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2269 struct nlattr **attrs)
2271 return -ENOPROTOOPT;
2275 #ifdef CONFIG_XFRM_MIGRATE
2276 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2278 struct xfrm_user_migrate um;
2280 memset(&um, 0, sizeof(um));
2281 um.proto = m->proto;
2283 um.reqid = m->reqid;
2284 um.old_family = m->old_family;
2285 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2286 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2287 um.new_family = m->new_family;
2288 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2289 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2291 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2294 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2296 struct xfrm_user_kmaddress uk;
2298 memset(&uk, 0, sizeof(uk));
2299 uk.family = k->family;
2300 uk.reserved = k->reserved;
2301 memcpy(&uk.local, &k->local, sizeof(uk.local));
2302 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2304 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2307 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2309 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2310 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2311 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2312 + userpolicy_type_attrsize();
2315 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2316 int num_migrate, const struct xfrm_kmaddress *k,
2317 const struct xfrm_selector *sel, u8 dir, u8 type)
2319 const struct xfrm_migrate *mp;
2320 struct xfrm_userpolicy_id *pol_id;
2321 struct nlmsghdr *nlh;
2324 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2328 pol_id = nlmsg_data(nlh);
2329 /* copy data from selector, dir, and type to the pol_id */
2330 memset(pol_id, 0, sizeof(*pol_id));
2331 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2335 err = copy_to_user_kmaddress(k, skb);
2339 err = copy_to_user_policy_type(type, skb);
2342 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2343 err = copy_to_user_migrate(mp, skb);
2348 nlmsg_end(skb, nlh);
2352 nlmsg_cancel(skb, nlh);
2356 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2357 const struct xfrm_migrate *m, int num_migrate,
2358 const struct xfrm_kmaddress *k)
2360 struct net *net = &init_net;
2361 struct sk_buff *skb;
2363 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2368 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2371 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2374 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2375 const struct xfrm_migrate *m, int num_migrate,
2376 const struct xfrm_kmaddress *k)
2378 return -ENOPROTOOPT;
2382 #define XMSGSIZE(type) sizeof(struct type)
2384 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2385 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2386 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2387 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2388 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2389 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2390 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2391 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2392 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2393 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2394 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2395 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2396 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2397 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2398 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2399 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2400 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2401 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2402 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2403 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2404 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2405 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2410 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2411 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2412 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2413 [XFRMA_LASTUSED] = { .type = NLA_U64},
2414 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2415 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2416 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2417 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2418 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2419 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2420 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2421 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2422 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2423 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2424 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2425 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2426 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2427 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2428 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2429 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2430 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2431 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2432 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2433 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2434 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2435 [XFRMA_PROTO] = { .type = NLA_U8 },
2436 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2437 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2440 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2441 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2442 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2445 static const struct xfrm_link {
2446 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2447 int (*dump)(struct sk_buff *, struct netlink_callback *);
2448 int (*done)(struct netlink_callback *);
2449 const struct nla_policy *nla_pol;
2451 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2452 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2453 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2454 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2455 .dump = xfrm_dump_sa,
2456 .done = xfrm_dump_sa_done },
2457 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2458 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2459 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2460 .dump = xfrm_dump_policy,
2461 .done = xfrm_dump_policy_done },
2462 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2463 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2464 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2465 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2466 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2467 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2468 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2469 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2470 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2471 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2472 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2473 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2474 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2475 .nla_pol = xfrma_spd_policy,
2476 .nla_max = XFRMA_SPD_MAX },
2477 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2480 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2481 struct netlink_ext_ack *extack)
2483 struct net *net = sock_net(skb->sk);
2484 struct nlattr *attrs[XFRMA_MAX+1];
2485 const struct xfrm_link *link;
2488 #ifdef CONFIG_COMPAT
2489 if (in_compat_syscall())
2493 type = nlh->nlmsg_type;
2494 if (type > XFRM_MSG_MAX)
2497 type -= XFRM_MSG_BASE;
2498 link = &xfrm_dispatch[type];
2500 /* All operations require privileges, even GET */
2501 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2504 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2505 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2506 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2507 if (link->dump == NULL)
2511 struct netlink_dump_control c = {
2515 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2519 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2520 link->nla_max ? : XFRMA_MAX,
2521 link->nla_pol ? : xfrma_policy, extack);
2525 if (link->doit == NULL)
2528 return link->doit(skb, nlh, attrs);
2531 static void xfrm_netlink_rcv(struct sk_buff *skb)
2533 struct net *net = sock_net(skb->sk);
2535 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2536 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2537 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2540 static inline size_t xfrm_expire_msgsize(void)
2542 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2543 + nla_total_size(sizeof(struct xfrm_mark));
2546 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2548 struct xfrm_user_expire *ue;
2549 struct nlmsghdr *nlh;
2552 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2556 ue = nlmsg_data(nlh);
2557 copy_to_user_state(x, &ue->state);
2558 ue->hard = (c->data.hard != 0) ? 1 : 0;
2560 err = xfrm_mark_put(skb, &x->mark);
2564 nlmsg_end(skb, nlh);
2568 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2570 struct net *net = xs_net(x);
2571 struct sk_buff *skb;
2573 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2577 if (build_expire(skb, x, c) < 0) {
2582 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2585 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2587 struct net *net = xs_net(x);
2588 struct sk_buff *skb;
2590 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2594 if (build_aevent(skb, x, c) < 0)
2597 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2600 static int xfrm_notify_sa_flush(const struct km_event *c)
2602 struct net *net = c->net;
2603 struct xfrm_usersa_flush *p;
2604 struct nlmsghdr *nlh;
2605 struct sk_buff *skb;
2606 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2608 skb = nlmsg_new(len, GFP_ATOMIC);
2612 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2618 p = nlmsg_data(nlh);
2619 p->proto = c->data.proto;
2621 nlmsg_end(skb, nlh);
2623 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2626 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2630 l += nla_total_size(aead_len(x->aead));
2632 l += nla_total_size(sizeof(struct xfrm_algo) +
2633 (x->aalg->alg_key_len + 7) / 8);
2634 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2637 l += nla_total_size(xfrm_alg_len(x->ealg));
2639 l += nla_total_size(sizeof(*x->calg));
2641 l += nla_total_size(sizeof(*x->encap));
2643 l += nla_total_size(sizeof(x->tfcpad));
2645 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2647 l += nla_total_size(sizeof(struct xfrm_replay_state));
2649 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2650 x->security->ctx_len);
2652 l += nla_total_size(sizeof(*x->coaddr));
2653 if (x->props.extra_flags)
2654 l += nla_total_size(sizeof(x->props.extra_flags));
2656 l += nla_total_size(sizeof(x->xso));
2658 /* Must count x->lastused as it may become non-zero behind our back. */
2659 l += nla_total_size_64bit(sizeof(u64));
2664 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2666 struct net *net = xs_net(x);
2667 struct xfrm_usersa_info *p;
2668 struct xfrm_usersa_id *id;
2669 struct nlmsghdr *nlh;
2670 struct sk_buff *skb;
2671 int len = xfrm_sa_len(x);
2674 headlen = sizeof(*p);
2675 if (c->event == XFRM_MSG_DELSA) {
2676 len += nla_total_size(headlen);
2677 headlen = sizeof(*id);
2678 len += nla_total_size(sizeof(struct xfrm_mark));
2680 len += NLMSG_ALIGN(headlen);
2682 skb = nlmsg_new(len, GFP_ATOMIC);
2686 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2691 p = nlmsg_data(nlh);
2692 if (c->event == XFRM_MSG_DELSA) {
2693 struct nlattr *attr;
2695 id = nlmsg_data(nlh);
2696 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2697 id->spi = x->id.spi;
2698 id->family = x->props.family;
2699 id->proto = x->id.proto;
2701 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2708 err = copy_to_user_state_extra(x, p, skb);
2712 nlmsg_end(skb, nlh);
2714 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2721 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2725 case XFRM_MSG_EXPIRE:
2726 return xfrm_exp_state_notify(x, c);
2727 case XFRM_MSG_NEWAE:
2728 return xfrm_aevent_state_notify(x, c);
2729 case XFRM_MSG_DELSA:
2730 case XFRM_MSG_UPDSA:
2731 case XFRM_MSG_NEWSA:
2732 return xfrm_notify_sa(x, c);
2733 case XFRM_MSG_FLUSHSA:
2734 return xfrm_notify_sa_flush(c);
2736 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2745 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2746 struct xfrm_policy *xp)
2748 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2749 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2750 + nla_total_size(sizeof(struct xfrm_mark))
2751 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2752 + userpolicy_type_attrsize();
2755 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2756 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2758 __u32 seq = xfrm_get_acqseq();
2759 struct xfrm_user_acquire *ua;
2760 struct nlmsghdr *nlh;
2763 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2767 ua = nlmsg_data(nlh);
2768 memcpy(&ua->id, &x->id, sizeof(ua->id));
2769 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2770 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2771 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2772 ua->aalgos = xt->aalgos;
2773 ua->ealgos = xt->ealgos;
2774 ua->calgos = xt->calgos;
2775 ua->seq = x->km.seq = seq;
2777 err = copy_to_user_tmpl(xp, skb);
2779 err = copy_to_user_state_sec_ctx(x, skb);
2781 err = copy_to_user_policy_type(xp->type, skb);
2783 err = xfrm_mark_put(skb, &xp->mark);
2785 nlmsg_cancel(skb, nlh);
2789 nlmsg_end(skb, nlh);
2793 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2794 struct xfrm_policy *xp)
2796 struct net *net = xs_net(x);
2797 struct sk_buff *skb;
2799 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2803 if (build_acquire(skb, x, xt, xp) < 0)
2806 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2809 /* User gives us xfrm_user_policy_info followed by an array of 0
2810 * or more templates.
2812 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2813 u8 *data, int len, int *dir)
2815 struct net *net = sock_net(sk);
2816 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2817 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2818 struct xfrm_policy *xp;
2821 switch (sk->sk_family) {
2823 if (opt != IP_XFRM_POLICY) {
2828 #if IS_ENABLED(CONFIG_IPV6)
2830 if (opt != IPV6_XFRM_POLICY) {
2843 if (len < sizeof(*p) ||
2844 verify_newpolicy_info(p))
2847 nr = ((len - sizeof(*p)) / sizeof(*ut));
2848 if (validate_tmpl(nr, ut, p->sel.family))
2851 if (p->dir > XFRM_POLICY_OUT)
2854 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2860 copy_from_user_policy(xp, p);
2861 xp->type = XFRM_POLICY_TYPE_MAIN;
2862 copy_templates(xp, ut, nr);
2869 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2871 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2872 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2873 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2874 + nla_total_size(sizeof(struct xfrm_mark))
2875 + userpolicy_type_attrsize();
2878 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2879 int dir, const struct km_event *c)
2881 struct xfrm_user_polexpire *upe;
2882 int hard = c->data.hard;
2883 struct nlmsghdr *nlh;
2886 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2890 upe = nlmsg_data(nlh);
2891 copy_to_user_policy(xp, &upe->pol, dir);
2892 err = copy_to_user_tmpl(xp, skb);
2894 err = copy_to_user_sec_ctx(xp, skb);
2896 err = copy_to_user_policy_type(xp->type, skb);
2898 err = xfrm_mark_put(skb, &xp->mark);
2900 nlmsg_cancel(skb, nlh);
2905 nlmsg_end(skb, nlh);
2909 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2911 struct net *net = xp_net(xp);
2912 struct sk_buff *skb;
2914 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2918 if (build_polexpire(skb, xp, dir, c) < 0)
2921 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2924 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2926 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2927 struct net *net = xp_net(xp);
2928 struct xfrm_userpolicy_info *p;
2929 struct xfrm_userpolicy_id *id;
2930 struct nlmsghdr *nlh;
2931 struct sk_buff *skb;
2934 headlen = sizeof(*p);
2935 if (c->event == XFRM_MSG_DELPOLICY) {
2936 len += nla_total_size(headlen);
2937 headlen = sizeof(*id);
2939 len += userpolicy_type_attrsize();
2940 len += nla_total_size(sizeof(struct xfrm_mark));
2941 len += NLMSG_ALIGN(headlen);
2943 skb = nlmsg_new(len, GFP_ATOMIC);
2947 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2952 p = nlmsg_data(nlh);
2953 if (c->event == XFRM_MSG_DELPOLICY) {
2954 struct nlattr *attr;
2956 id = nlmsg_data(nlh);
2957 memset(id, 0, sizeof(*id));
2960 id->index = xp->index;
2962 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2964 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2972 copy_to_user_policy(xp, p, dir);
2973 err = copy_to_user_tmpl(xp, skb);
2975 err = copy_to_user_policy_type(xp->type, skb);
2977 err = xfrm_mark_put(skb, &xp->mark);
2981 nlmsg_end(skb, nlh);
2983 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
2990 static int xfrm_notify_policy_flush(const struct km_event *c)
2992 struct net *net = c->net;
2993 struct nlmsghdr *nlh;
2994 struct sk_buff *skb;
2997 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3001 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3005 err = copy_to_user_policy_type(c->data.type, skb);
3009 nlmsg_end(skb, nlh);
3011 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3018 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3022 case XFRM_MSG_NEWPOLICY:
3023 case XFRM_MSG_UPDPOLICY:
3024 case XFRM_MSG_DELPOLICY:
3025 return xfrm_notify_policy(xp, dir, c);
3026 case XFRM_MSG_FLUSHPOLICY:
3027 return xfrm_notify_policy_flush(c);
3028 case XFRM_MSG_POLEXPIRE:
3029 return xfrm_exp_policy_notify(xp, dir, c);
3031 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3039 static inline size_t xfrm_report_msgsize(void)
3041 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3044 static int build_report(struct sk_buff *skb, u8 proto,
3045 struct xfrm_selector *sel, xfrm_address_t *addr)
3047 struct xfrm_user_report *ur;
3048 struct nlmsghdr *nlh;
3050 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3054 ur = nlmsg_data(nlh);
3056 memcpy(&ur->sel, sel, sizeof(ur->sel));
3059 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3061 nlmsg_cancel(skb, nlh);
3065 nlmsg_end(skb, nlh);
3069 static int xfrm_send_report(struct net *net, u8 proto,
3070 struct xfrm_selector *sel, xfrm_address_t *addr)
3072 struct sk_buff *skb;
3074 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3078 if (build_report(skb, proto, sel, addr) < 0)
3081 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3084 static inline size_t xfrm_mapping_msgsize(void)
3086 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3089 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3090 xfrm_address_t *new_saddr, __be16 new_sport)
3092 struct xfrm_user_mapping *um;
3093 struct nlmsghdr *nlh;
3095 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3099 um = nlmsg_data(nlh);
3101 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3102 um->id.spi = x->id.spi;
3103 um->id.family = x->props.family;
3104 um->id.proto = x->id.proto;
3105 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3106 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3107 um->new_sport = new_sport;
3108 um->old_sport = x->encap->encap_sport;
3109 um->reqid = x->props.reqid;
3111 nlmsg_end(skb, nlh);
3115 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3118 struct net *net = xs_net(x);
3119 struct sk_buff *skb;
3121 if (x->id.proto != IPPROTO_ESP)
3127 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3131 if (build_mapping(skb, x, ipaddr, sport) < 0)
3134 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3137 static bool xfrm_is_alive(const struct km_event *c)
3139 return (bool)xfrm_acquire_is_on(c->net);
3142 static struct xfrm_mgr netlink_mgr = {
3143 .notify = xfrm_send_state_notify,
3144 .acquire = xfrm_send_acquire,
3145 .compile_policy = xfrm_compile_policy,
3146 .notify_policy = xfrm_send_policy_notify,
3147 .report = xfrm_send_report,
3148 .migrate = xfrm_send_migrate,
3149 .new_mapping = xfrm_send_mapping,
3150 .is_alive = xfrm_is_alive,
3153 static int __net_init xfrm_user_net_init(struct net *net)
3156 struct netlink_kernel_cfg cfg = {
3157 .groups = XFRMNLGRP_MAX,
3158 .input = xfrm_netlink_rcv,
3161 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3164 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3165 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3169 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3172 list_for_each_entry(net, net_exit_list, exit_list)
3173 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3175 list_for_each_entry(net, net_exit_list, exit_list)
3176 netlink_kernel_release(net->xfrm.nlsk_stash);
3179 static struct pernet_operations xfrm_user_net_ops = {
3180 .init = xfrm_user_net_init,
3181 .exit_batch = xfrm_user_net_exit,
3184 static int __init xfrm_user_init(void)
3188 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3190 rv = register_pernet_subsys(&xfrm_user_net_ops);
3193 rv = xfrm_register_km(&netlink_mgr);
3195 unregister_pernet_subsys(&xfrm_user_net_ops);
3199 static void __exit xfrm_user_exit(void)
3201 xfrm_unregister_km(&netlink_mgr);
3202 unregister_pernet_subsys(&xfrm_user_net_ops);
3205 module_init(xfrm_user_init);
3206 module_exit(xfrm_user_exit);
3207 MODULE_LICENSE("GPL");
3208 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);