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 <asm/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
35 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
37 struct nlattr *rt = attrs[type];
38 struct xfrm_algo *algp;
44 if (nla_len(rt) < xfrm_alg_len(algp))
57 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
61 static int verify_auth_trunc(struct nlattr **attrs)
63 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
64 struct xfrm_algo_auth *algp;
70 if (nla_len(rt) < xfrm_alg_auth_len(algp))
73 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
77 static int verify_aead(struct nlattr **attrs)
79 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
80 struct xfrm_algo_aead *algp;
86 if (nla_len(rt) < aead_len(algp))
89 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
93 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
94 xfrm_address_t **addrp)
96 struct nlattr *rt = attrs[type];
99 *addrp = nla_data(rt);
102 static inline int verify_sec_ctx_len(struct nlattr **attrs)
104 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
105 struct xfrm_user_sec_ctx *uctx;
111 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
117 static inline int verify_replay(struct xfrm_usersa_info *p,
118 struct nlattr **attrs)
120 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
121 struct xfrm_replay_state_esn *rs;
123 if (p->flags & XFRM_STATE_ESN) {
129 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
132 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
133 nla_len(rt) != sizeof(*rs))
140 /* As only ESP and AH support ESN feature. */
141 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
144 if (p->replay_window != 0)
150 static int verify_newsa_info(struct xfrm_usersa_info *p,
151 struct nlattr **attrs)
161 #if IS_ENABLED(CONFIG_IPV6)
173 switch (p->id.proto) {
175 if ((!attrs[XFRMA_ALG_AUTH] &&
176 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
177 attrs[XFRMA_ALG_AEAD] ||
178 attrs[XFRMA_ALG_CRYPT] ||
179 attrs[XFRMA_ALG_COMP] ||
180 attrs[XFRMA_TFCPAD] ||
181 (ntohl(p->id.spi) >= 0x10000))
187 if (attrs[XFRMA_ALG_COMP])
189 if (!attrs[XFRMA_ALG_AUTH] &&
190 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
191 !attrs[XFRMA_ALG_CRYPT] &&
192 !attrs[XFRMA_ALG_AEAD])
194 if ((attrs[XFRMA_ALG_AUTH] ||
195 attrs[XFRMA_ALG_AUTH_TRUNC] ||
196 attrs[XFRMA_ALG_CRYPT]) &&
197 attrs[XFRMA_ALG_AEAD])
199 if (attrs[XFRMA_TFCPAD] &&
200 p->mode != XFRM_MODE_TUNNEL)
205 if (!attrs[XFRMA_ALG_COMP] ||
206 attrs[XFRMA_ALG_AEAD] ||
207 attrs[XFRMA_ALG_AUTH] ||
208 attrs[XFRMA_ALG_AUTH_TRUNC] ||
209 attrs[XFRMA_ALG_CRYPT] ||
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_auth(struct xfrm_algo_auth **algpp, u8 *props,
296 struct xfrm_algo *ualg;
297 struct xfrm_algo_auth *p;
298 struct xfrm_algo_desc *algo;
303 ualg = nla_data(rta);
305 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
308 *props = algo->desc.sadb_alg_id;
310 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
314 strcpy(p->alg_name, algo->name);
315 p->alg_key_len = ualg->alg_key_len;
316 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
317 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
323 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
326 struct xfrm_algo_auth *p, *ualg;
327 struct xfrm_algo_desc *algo;
332 ualg = nla_data(rta);
334 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
337 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
338 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
340 *props = algo->desc.sadb_alg_id;
342 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
346 strcpy(p->alg_name, algo->name);
347 if (!p->alg_trunc_len)
348 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
354 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
357 struct xfrm_algo_aead *p, *ualg;
358 struct xfrm_algo_desc *algo;
363 ualg = nla_data(rta);
365 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
368 *props = algo->desc.sadb_alg_id;
370 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
374 strcpy(p->alg_name, algo->name);
379 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
382 struct xfrm_replay_state_esn *up;
385 if (!replay_esn || !rp)
389 ulen = xfrm_replay_state_esn_len(up);
391 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
397 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
398 struct xfrm_replay_state_esn **preplay_esn,
401 struct xfrm_replay_state_esn *p, *pp, *up;
408 klen = xfrm_replay_state_esn_len(up);
409 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
411 p = kzalloc(klen, GFP_KERNEL);
415 pp = kzalloc(klen, GFP_KERNEL);
422 memcpy(pp, up, ulen);
430 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
435 len += sizeof(struct xfrm_user_sec_ctx);
436 len += xfrm_ctx->ctx_len;
441 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
443 memcpy(&x->id, &p->id, sizeof(x->id));
444 memcpy(&x->sel, &p->sel, sizeof(x->sel));
445 memcpy(&x->lft, &p->lft, sizeof(x->lft));
446 x->props.mode = p->mode;
447 x->props.replay_window = min_t(unsigned int, p->replay_window,
448 sizeof(x->replay.bitmap) * 8);
449 x->props.reqid = p->reqid;
450 x->props.family = p->family;
451 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
452 x->props.flags = p->flags;
454 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
455 x->sel.family = p->family;
459 * someday when pfkey also has support, we could have the code
460 * somehow made shareable and move it to xfrm_state.c - JHS
463 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
466 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
467 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
468 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
469 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
470 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
473 struct xfrm_replay_state_esn *replay_esn;
474 replay_esn = nla_data(re);
475 memcpy(x->replay_esn, replay_esn,
476 xfrm_replay_state_esn_len(replay_esn));
477 memcpy(x->preplay_esn, replay_esn,
478 xfrm_replay_state_esn_len(replay_esn));
482 struct xfrm_replay_state *replay;
483 replay = nla_data(rp);
484 memcpy(&x->replay, replay, sizeof(*replay));
485 memcpy(&x->preplay, replay, sizeof(*replay));
489 struct xfrm_lifetime_cur *ltime;
490 ltime = nla_data(lt);
491 x->curlft.bytes = ltime->bytes;
492 x->curlft.packets = ltime->packets;
493 x->curlft.add_time = ltime->add_time;
494 x->curlft.use_time = ltime->use_time;
498 x->replay_maxage = nla_get_u32(et);
501 x->replay_maxdiff = nla_get_u32(rt);
504 static struct xfrm_state *xfrm_state_construct(struct net *net,
505 struct xfrm_usersa_info *p,
506 struct nlattr **attrs,
509 struct xfrm_state *x = xfrm_state_alloc(net);
515 copy_from_user_state(x, p);
517 if (attrs[XFRMA_SA_EXTRA_FLAGS])
518 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
520 if ((err = attach_aead(&x->aead, &x->props.ealgo,
521 attrs[XFRMA_ALG_AEAD])))
523 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
524 attrs[XFRMA_ALG_AUTH_TRUNC])))
526 if (!x->props.aalgo) {
527 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
528 attrs[XFRMA_ALG_AUTH])))
531 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
532 xfrm_ealg_get_byname,
533 attrs[XFRMA_ALG_CRYPT])))
535 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
536 xfrm_calg_get_byname,
537 attrs[XFRMA_ALG_COMP])))
540 if (attrs[XFRMA_ENCAP]) {
541 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
542 sizeof(*x->encap), GFP_KERNEL);
543 if (x->encap == NULL)
547 if (attrs[XFRMA_TFCPAD])
548 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
550 if (attrs[XFRMA_COADDR]) {
551 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
552 sizeof(*x->coaddr), GFP_KERNEL);
553 if (x->coaddr == NULL)
557 xfrm_mark_get(attrs, &x->mark);
559 err = __xfrm_init_state(x, false);
563 if (attrs[XFRMA_SEC_CTX] &&
564 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
567 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
568 attrs[XFRMA_REPLAY_ESN_VAL])))
572 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
573 /* sysctl_xfrm_aevent_etime is in 100ms units */
574 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
576 if ((err = xfrm_init_replay(x)))
579 /* override default values from above */
580 xfrm_update_ae_params(x, attrs, 0);
585 x->km.state = XFRM_STATE_DEAD;
592 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
593 struct nlattr **attrs)
595 struct net *net = sock_net(skb->sk);
596 struct xfrm_usersa_info *p = nlmsg_data(nlh);
597 struct xfrm_state *x;
601 err = verify_newsa_info(p, attrs);
605 x = xfrm_state_construct(net, p, attrs, &err);
610 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
611 err = xfrm_state_add(x);
613 err = xfrm_state_update(x);
615 xfrm_audit_state_add(x, err ? 0 : 1, true);
618 x->km.state = XFRM_STATE_DEAD;
623 c.seq = nlh->nlmsg_seq;
624 c.portid = nlh->nlmsg_pid;
625 c.event = nlh->nlmsg_type;
627 km_state_notify(x, &c);
633 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
634 struct xfrm_usersa_id *p,
635 struct nlattr **attrs,
638 struct xfrm_state *x = NULL;
641 u32 mark = xfrm_mark_get(attrs, &m);
643 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
645 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
647 xfrm_address_t *saddr = NULL;
649 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
656 x = xfrm_state_lookup_byaddr(net, mark,
658 p->proto, p->family);
667 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
668 struct nlattr **attrs)
670 struct net *net = sock_net(skb->sk);
671 struct xfrm_state *x;
674 struct xfrm_usersa_id *p = nlmsg_data(nlh);
676 x = xfrm_user_state_lookup(net, p, attrs, &err);
680 if ((err = security_xfrm_state_delete(x)) != 0)
683 if (xfrm_state_kern(x)) {
688 err = xfrm_state_delete(x);
693 c.seq = nlh->nlmsg_seq;
694 c.portid = nlh->nlmsg_pid;
695 c.event = nlh->nlmsg_type;
696 km_state_notify(x, &c);
699 xfrm_audit_state_delete(x, err ? 0 : 1, true);
704 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
706 memset(p, 0, sizeof(*p));
707 memcpy(&p->id, &x->id, sizeof(p->id));
708 memcpy(&p->sel, &x->sel, sizeof(p->sel));
709 memcpy(&p->lft, &x->lft, sizeof(p->lft));
710 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
711 memcpy(&p->stats, &x->stats, sizeof(p->stats));
712 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
713 p->mode = x->props.mode;
714 p->replay_window = x->props.replay_window;
715 p->reqid = x->props.reqid;
716 p->family = x->props.family;
717 p->flags = x->props.flags;
721 struct xfrm_dump_info {
722 struct sk_buff *in_skb;
723 struct sk_buff *out_skb;
728 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
730 struct xfrm_user_sec_ctx *uctx;
732 int ctx_size = sizeof(*uctx) + s->ctx_len;
734 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
738 uctx = nla_data(attr);
739 uctx->exttype = XFRMA_SEC_CTX;
740 uctx->len = ctx_size;
741 uctx->ctx_doi = s->ctx_doi;
742 uctx->ctx_alg = s->ctx_alg;
743 uctx->ctx_len = s->ctx_len;
744 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
749 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
751 struct xfrm_algo *algo;
754 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
755 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
759 algo = nla_data(nla);
760 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
761 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
762 algo->alg_key_len = auth->alg_key_len;
767 /* Don't change this without updating xfrm_sa_len! */
768 static int copy_to_user_state_extra(struct xfrm_state *x,
769 struct xfrm_usersa_info *p,
774 copy_to_user_state(x, p);
776 if (x->props.extra_flags) {
777 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
778 x->props.extra_flags);
784 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
789 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
794 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
799 ret = copy_to_user_auth(x->aalg, skb);
801 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
802 xfrm_alg_auth_len(x->aalg), x->aalg);
807 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
812 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
817 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
822 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
826 ret = xfrm_mark_put(skb, &x->mark);
830 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
831 xfrm_replay_state_esn_len(x->replay_esn),
837 ret = copy_sec_ctx(x->security, skb);
842 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
844 struct xfrm_dump_info *sp = ptr;
845 struct sk_buff *in_skb = sp->in_skb;
846 struct sk_buff *skb = sp->out_skb;
847 struct xfrm_usersa_info *p;
848 struct nlmsghdr *nlh;
851 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
852 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
858 err = copy_to_user_state_extra(x, p, skb);
860 nlmsg_cancel(skb, nlh);
867 static int xfrm_dump_sa_done(struct netlink_callback *cb)
869 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
870 struct sock *sk = cb->skb->sk;
871 struct net *net = sock_net(sk);
873 xfrm_state_walk_done(walk, net);
877 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
878 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
880 struct net *net = sock_net(skb->sk);
881 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
882 struct xfrm_dump_info info;
884 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
885 sizeof(cb->args) - sizeof(cb->args[0]));
887 info.in_skb = cb->skb;
889 info.nlmsg_seq = cb->nlh->nlmsg_seq;
890 info.nlmsg_flags = NLM_F_MULTI;
893 struct nlattr *attrs[XFRMA_MAX+1];
894 struct xfrm_address_filter *filter = NULL;
900 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
905 if (attrs[XFRMA_ADDRESS_FILTER]) {
906 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
910 memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]),
914 if (attrs[XFRMA_PROTO])
915 proto = nla_get_u8(attrs[XFRMA_PROTO]);
917 xfrm_state_walk_init(walk, proto, filter);
920 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
925 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
926 struct xfrm_state *x, u32 seq)
928 struct xfrm_dump_info info;
932 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
934 return ERR_PTR(-ENOMEM);
936 info.in_skb = in_skb;
938 info.nlmsg_seq = seq;
939 info.nlmsg_flags = 0;
941 err = dump_one_state(x, 0, &info);
950 static inline size_t xfrm_spdinfo_msgsize(void)
952 return NLMSG_ALIGN(4)
953 + nla_total_size(sizeof(struct xfrmu_spdinfo))
954 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
957 static int build_spdinfo(struct sk_buff *skb, struct net *net,
958 u32 portid, u32 seq, u32 flags)
960 struct xfrmk_spdinfo si;
961 struct xfrmu_spdinfo spc;
962 struct xfrmu_spdhinfo sph;
963 struct nlmsghdr *nlh;
967 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
968 if (nlh == NULL) /* shouldn't really happen ... */
973 xfrm_spd_getinfo(net, &si);
974 spc.incnt = si.incnt;
975 spc.outcnt = si.outcnt;
976 spc.fwdcnt = si.fwdcnt;
977 spc.inscnt = si.inscnt;
978 spc.outscnt = si.outscnt;
979 spc.fwdscnt = si.fwdscnt;
980 sph.spdhcnt = si.spdhcnt;
981 sph.spdhmcnt = si.spdhmcnt;
983 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
985 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
987 nlmsg_cancel(skb, nlh);
991 return nlmsg_end(skb, nlh);
994 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
995 struct nlattr **attrs)
997 struct net *net = sock_net(skb->sk);
998 struct sk_buff *r_skb;
999 u32 *flags = nlmsg_data(nlh);
1000 u32 sportid = NETLINK_CB(skb).portid;
1001 u32 seq = nlh->nlmsg_seq;
1003 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1007 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
1010 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1013 static inline size_t xfrm_sadinfo_msgsize(void)
1015 return NLMSG_ALIGN(4)
1016 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1017 + nla_total_size(4); /* XFRMA_SAD_CNT */
1020 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1021 u32 portid, u32 seq, u32 flags)
1023 struct xfrmk_sadinfo si;
1024 struct xfrmu_sadhinfo sh;
1025 struct nlmsghdr *nlh;
1029 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1030 if (nlh == NULL) /* shouldn't really happen ... */
1033 f = nlmsg_data(nlh);
1035 xfrm_sad_getinfo(net, &si);
1037 sh.sadhmcnt = si.sadhmcnt;
1038 sh.sadhcnt = si.sadhcnt;
1040 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1042 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1044 nlmsg_cancel(skb, nlh);
1048 return nlmsg_end(skb, nlh);
1051 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1052 struct nlattr **attrs)
1054 struct net *net = sock_net(skb->sk);
1055 struct sk_buff *r_skb;
1056 u32 *flags = nlmsg_data(nlh);
1057 u32 sportid = NETLINK_CB(skb).portid;
1058 u32 seq = nlh->nlmsg_seq;
1060 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1064 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
1067 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1070 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1071 struct nlattr **attrs)
1073 struct net *net = sock_net(skb->sk);
1074 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1075 struct xfrm_state *x;
1076 struct sk_buff *resp_skb;
1079 x = xfrm_user_state_lookup(net, p, attrs, &err);
1083 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1084 if (IS_ERR(resp_skb)) {
1085 err = PTR_ERR(resp_skb);
1087 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1094 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1095 struct nlattr **attrs)
1097 struct net *net = sock_net(skb->sk);
1098 struct xfrm_state *x;
1099 struct xfrm_userspi_info *p;
1100 struct sk_buff *resp_skb;
1101 xfrm_address_t *daddr;
1107 p = nlmsg_data(nlh);
1108 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1112 family = p->info.family;
1113 daddr = &p->info.id.daddr;
1117 mark = xfrm_mark_get(attrs, &m);
1119 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1120 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1127 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1128 p->info.id.proto, daddr,
1135 err = xfrm_alloc_spi(x, p->min, p->max);
1139 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1140 if (IS_ERR(resp_skb)) {
1141 err = PTR_ERR(resp_skb);
1145 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1153 static int verify_policy_dir(u8 dir)
1156 case XFRM_POLICY_IN:
1157 case XFRM_POLICY_OUT:
1158 case XFRM_POLICY_FWD:
1168 static int verify_policy_type(u8 type)
1171 case XFRM_POLICY_TYPE_MAIN:
1172 #ifdef CONFIG_XFRM_SUB_POLICY
1173 case XFRM_POLICY_TYPE_SUB:
1184 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1189 case XFRM_SHARE_ANY:
1190 case XFRM_SHARE_SESSION:
1191 case XFRM_SHARE_USER:
1192 case XFRM_SHARE_UNIQUE:
1199 switch (p->action) {
1200 case XFRM_POLICY_ALLOW:
1201 case XFRM_POLICY_BLOCK:
1208 switch (p->sel.family) {
1213 #if IS_ENABLED(CONFIG_IPV6)
1216 return -EAFNOSUPPORT;
1223 ret = verify_policy_dir(p->dir);
1226 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1232 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1234 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1235 struct xfrm_user_sec_ctx *uctx;
1240 uctx = nla_data(rt);
1241 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1244 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1250 for (i = 0; i < nr; i++, ut++) {
1251 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1253 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1254 memcpy(&t->saddr, &ut->saddr,
1255 sizeof(xfrm_address_t));
1256 t->reqid = ut->reqid;
1258 t->share = ut->share;
1259 t->optional = ut->optional;
1260 t->aalgos = ut->aalgos;
1261 t->ealgos = ut->ealgos;
1262 t->calgos = ut->calgos;
1263 /* If all masks are ~0, then we allow all algorithms. */
1264 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1265 t->encap_family = ut->family;
1269 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1273 if (nr > XFRM_MAX_DEPTH)
1276 for (i = 0; i < nr; i++) {
1277 /* We never validated the ut->family value, so many
1278 * applications simply leave it at zero. The check was
1279 * never made and ut->family was ignored because all
1280 * templates could be assumed to have the same family as
1281 * the policy itself. Now that we will have ipv4-in-ipv6
1282 * and ipv6-in-ipv4 tunnels, this is no longer true.
1285 ut[i].family = family;
1287 switch (ut[i].family) {
1290 #if IS_ENABLED(CONFIG_IPV6)
1302 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1304 struct nlattr *rt = attrs[XFRMA_TMPL];
1309 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1310 int nr = nla_len(rt) / sizeof(*utmpl);
1313 err = validate_tmpl(nr, utmpl, pol->family);
1317 copy_templates(pol, utmpl, nr);
1322 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1324 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1325 struct xfrm_userpolicy_type *upt;
1326 u8 type = XFRM_POLICY_TYPE_MAIN;
1334 err = verify_policy_type(type);
1342 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1344 xp->priority = p->priority;
1345 xp->index = p->index;
1346 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1347 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1348 xp->action = p->action;
1349 xp->flags = p->flags;
1350 xp->family = p->sel.family;
1351 /* XXX xp->share = p->share; */
1354 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1356 memset(p, 0, sizeof(*p));
1357 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1358 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1359 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1360 p->priority = xp->priority;
1361 p->index = xp->index;
1362 p->sel.family = xp->family;
1364 p->action = xp->action;
1365 p->flags = xp->flags;
1366 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1369 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1371 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1379 copy_from_user_policy(xp, p);
1381 err = copy_from_user_policy_type(&xp->type, attrs);
1385 if (!(err = copy_from_user_tmpl(xp, attrs)))
1386 err = copy_from_user_sec_ctx(xp, attrs);
1390 xfrm_mark_get(attrs, &xp->mark);
1396 xfrm_policy_destroy(xp);
1400 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1401 struct nlattr **attrs)
1403 struct net *net = sock_net(skb->sk);
1404 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1405 struct xfrm_policy *xp;
1410 err = verify_newpolicy_info(p);
1413 err = verify_sec_ctx_len(attrs);
1417 xp = xfrm_policy_construct(net, p, attrs, &err);
1421 /* shouldn't excl be based on nlh flags??
1422 * Aha! this is anti-netlink really i.e more pfkey derived
1423 * in netlink excl is a flag and you wouldnt need
1424 * a type XFRM_MSG_UPDPOLICY - JHS */
1425 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1426 err = xfrm_policy_insert(p->dir, xp, excl);
1427 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1430 security_xfrm_policy_free(xp->security);
1435 c.event = nlh->nlmsg_type;
1436 c.seq = nlh->nlmsg_seq;
1437 c.portid = nlh->nlmsg_pid;
1438 km_policy_notify(xp, p->dir, &c);
1445 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1447 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1450 if (xp->xfrm_nr == 0)
1453 for (i = 0; i < xp->xfrm_nr; i++) {
1454 struct xfrm_user_tmpl *up = &vec[i];
1455 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1457 memset(up, 0, sizeof(*up));
1458 memcpy(&up->id, &kp->id, sizeof(up->id));
1459 up->family = kp->encap_family;
1460 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1461 up->reqid = kp->reqid;
1462 up->mode = kp->mode;
1463 up->share = kp->share;
1464 up->optional = kp->optional;
1465 up->aalgos = kp->aalgos;
1466 up->ealgos = kp->ealgos;
1467 up->calgos = kp->calgos;
1470 return nla_put(skb, XFRMA_TMPL,
1471 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1474 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1477 return copy_sec_ctx(x->security, skb);
1482 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1485 return copy_sec_ctx(xp->security, skb);
1488 static inline size_t userpolicy_type_attrsize(void)
1490 #ifdef CONFIG_XFRM_SUB_POLICY
1491 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1497 #ifdef CONFIG_XFRM_SUB_POLICY
1498 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1500 struct xfrm_userpolicy_type upt = {
1504 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1508 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1514 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1516 struct xfrm_dump_info *sp = ptr;
1517 struct xfrm_userpolicy_info *p;
1518 struct sk_buff *in_skb = sp->in_skb;
1519 struct sk_buff *skb = sp->out_skb;
1520 struct nlmsghdr *nlh;
1523 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1524 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1528 p = nlmsg_data(nlh);
1529 copy_to_user_policy(xp, p, dir);
1530 err = copy_to_user_tmpl(xp, skb);
1532 err = copy_to_user_sec_ctx(xp, skb);
1534 err = copy_to_user_policy_type(xp->type, skb);
1536 err = xfrm_mark_put(skb, &xp->mark);
1538 nlmsg_cancel(skb, nlh);
1541 nlmsg_end(skb, nlh);
1545 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1547 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1548 struct net *net = sock_net(cb->skb->sk);
1550 xfrm_policy_walk_done(walk, net);
1554 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1556 struct net *net = sock_net(skb->sk);
1557 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1558 struct xfrm_dump_info info;
1560 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1561 sizeof(cb->args) - sizeof(cb->args[0]));
1563 info.in_skb = cb->skb;
1565 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1566 info.nlmsg_flags = NLM_F_MULTI;
1570 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1573 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1578 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1579 struct xfrm_policy *xp,
1582 struct xfrm_dump_info info;
1583 struct sk_buff *skb;
1586 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1588 return ERR_PTR(-ENOMEM);
1590 info.in_skb = in_skb;
1592 info.nlmsg_seq = seq;
1593 info.nlmsg_flags = 0;
1595 err = dump_one_policy(xp, dir, 0, &info);
1598 return ERR_PTR(err);
1604 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1605 struct nlattr **attrs)
1607 struct net *net = sock_net(skb->sk);
1608 struct xfrm_policy *xp;
1609 struct xfrm_userpolicy_id *p;
1610 u8 type = XFRM_POLICY_TYPE_MAIN;
1615 u32 mark = xfrm_mark_get(attrs, &m);
1617 p = nlmsg_data(nlh);
1618 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1620 err = copy_from_user_policy_type(&type, attrs);
1624 err = verify_policy_dir(p->dir);
1629 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1631 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1632 struct xfrm_sec_ctx *ctx;
1634 err = verify_sec_ctx_len(attrs);
1640 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1642 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1646 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1648 security_xfrm_policy_free(ctx);
1654 struct sk_buff *resp_skb;
1656 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1657 if (IS_ERR(resp_skb)) {
1658 err = PTR_ERR(resp_skb);
1660 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1661 NETLINK_CB(skb).portid);
1664 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1669 c.data.byid = p->index;
1670 c.event = nlh->nlmsg_type;
1671 c.seq = nlh->nlmsg_seq;
1672 c.portid = nlh->nlmsg_pid;
1673 km_policy_notify(xp, p->dir, &c);
1678 if (delete && err == 0)
1679 xfrm_garbage_collect(net);
1683 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1684 struct nlattr **attrs)
1686 struct net *net = sock_net(skb->sk);
1688 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1691 err = xfrm_state_flush(net, p->proto, true);
1693 if (err == -ESRCH) /* empty table */
1697 c.data.proto = p->proto;
1698 c.event = nlh->nlmsg_type;
1699 c.seq = nlh->nlmsg_seq;
1700 c.portid = nlh->nlmsg_pid;
1702 km_state_notify(NULL, &c);
1707 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1709 size_t replay_size = x->replay_esn ?
1710 xfrm_replay_state_esn_len(x->replay_esn) :
1711 sizeof(struct xfrm_replay_state);
1713 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1714 + nla_total_size(replay_size)
1715 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1716 + nla_total_size(sizeof(struct xfrm_mark))
1717 + nla_total_size(4) /* XFRM_AE_RTHR */
1718 + nla_total_size(4); /* XFRM_AE_ETHR */
1721 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1723 struct xfrm_aevent_id *id;
1724 struct nlmsghdr *nlh;
1727 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1731 id = nlmsg_data(nlh);
1732 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1733 id->sa_id.spi = x->id.spi;
1734 id->sa_id.family = x->props.family;
1735 id->sa_id.proto = x->id.proto;
1736 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1737 id->reqid = x->props.reqid;
1738 id->flags = c->data.aevent;
1740 if (x->replay_esn) {
1741 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1742 xfrm_replay_state_esn_len(x->replay_esn),
1745 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1750 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1754 if (id->flags & XFRM_AE_RTHR) {
1755 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1759 if (id->flags & XFRM_AE_ETHR) {
1760 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1761 x->replay_maxage * 10 / HZ);
1765 err = xfrm_mark_put(skb, &x->mark);
1769 return nlmsg_end(skb, nlh);
1772 nlmsg_cancel(skb, nlh);
1776 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1777 struct nlattr **attrs)
1779 struct net *net = sock_net(skb->sk);
1780 struct xfrm_state *x;
1781 struct sk_buff *r_skb;
1786 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1787 struct xfrm_usersa_id *id = &p->sa_id;
1789 mark = xfrm_mark_get(attrs, &m);
1791 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1795 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1796 if (r_skb == NULL) {
1802 * XXX: is this lock really needed - none of the other
1803 * gets lock (the concern is things getting updated
1804 * while we are still reading) - jhs
1806 spin_lock_bh(&x->lock);
1807 c.data.aevent = p->flags;
1808 c.seq = nlh->nlmsg_seq;
1809 c.portid = nlh->nlmsg_pid;
1811 if (build_aevent(r_skb, x, &c) < 0)
1813 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
1814 spin_unlock_bh(&x->lock);
1819 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1820 struct nlattr **attrs)
1822 struct net *net = sock_net(skb->sk);
1823 struct xfrm_state *x;
1828 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1829 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1830 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1831 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1833 if (!lt && !rp && !re)
1836 /* pedantic mode - thou shalt sayeth replaceth */
1837 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1840 mark = xfrm_mark_get(attrs, &m);
1842 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1846 if (x->km.state != XFRM_STATE_VALID)
1849 err = xfrm_replay_verify_len(x->replay_esn, re);
1853 spin_lock_bh(&x->lock);
1854 xfrm_update_ae_params(x, attrs, 1);
1855 spin_unlock_bh(&x->lock);
1857 c.event = nlh->nlmsg_type;
1858 c.seq = nlh->nlmsg_seq;
1859 c.portid = nlh->nlmsg_pid;
1860 c.data.aevent = XFRM_AE_CU;
1861 km_state_notify(x, &c);
1868 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1869 struct nlattr **attrs)
1871 struct net *net = sock_net(skb->sk);
1873 u8 type = XFRM_POLICY_TYPE_MAIN;
1876 err = copy_from_user_policy_type(&type, attrs);
1880 err = xfrm_policy_flush(net, type, true);
1882 if (err == -ESRCH) /* empty table */
1888 c.event = nlh->nlmsg_type;
1889 c.seq = nlh->nlmsg_seq;
1890 c.portid = nlh->nlmsg_pid;
1892 km_policy_notify(NULL, 0, &c);
1896 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1897 struct nlattr **attrs)
1899 struct net *net = sock_net(skb->sk);
1900 struct xfrm_policy *xp;
1901 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1902 struct xfrm_userpolicy_info *p = &up->pol;
1903 u8 type = XFRM_POLICY_TYPE_MAIN;
1906 u32 mark = xfrm_mark_get(attrs, &m);
1908 err = copy_from_user_policy_type(&type, attrs);
1912 err = verify_policy_dir(p->dir);
1917 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1919 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1920 struct xfrm_sec_ctx *ctx;
1922 err = verify_sec_ctx_len(attrs);
1928 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1930 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1934 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1935 &p->sel, ctx, 0, &err);
1936 security_xfrm_policy_free(ctx);
1941 if (unlikely(xp->walk.dead))
1946 xfrm_policy_delete(xp, p->dir);
1947 xfrm_audit_policy_delete(xp, 1, true);
1949 // reset the timers here?
1950 WARN(1, "Dont know what to do with soft policy expire\n");
1952 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
1959 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1960 struct nlattr **attrs)
1962 struct net *net = sock_net(skb->sk);
1963 struct xfrm_state *x;
1965 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1966 struct xfrm_usersa_info *p = &ue->state;
1968 u32 mark = xfrm_mark_get(attrs, &m);
1970 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1976 spin_lock_bh(&x->lock);
1978 if (x->km.state != XFRM_STATE_VALID)
1980 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
1983 __xfrm_state_delete(x);
1984 xfrm_audit_state_delete(x, 1, true);
1988 spin_unlock_bh(&x->lock);
1993 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1994 struct nlattr **attrs)
1996 struct net *net = sock_net(skb->sk);
1997 struct xfrm_policy *xp;
1998 struct xfrm_user_tmpl *ut;
2000 struct nlattr *rt = attrs[XFRMA_TMPL];
2001 struct xfrm_mark mark;
2003 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2004 struct xfrm_state *x = xfrm_state_alloc(net);
2010 xfrm_mark_get(attrs, &mark);
2012 err = verify_newpolicy_info(&ua->policy);
2017 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2021 memcpy(&x->id, &ua->id, sizeof(ua->id));
2022 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2023 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2024 xp->mark.m = x->mark.m = mark.m;
2025 xp->mark.v = x->mark.v = mark.v;
2027 /* extract the templates and for each call km_key */
2028 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2029 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2030 memcpy(&x->id, &t->id, sizeof(x->id));
2031 x->props.mode = t->mode;
2032 x->props.reqid = t->reqid;
2033 x->props.family = ut->family;
2034 t->aalgos = ua->aalgos;
2035 t->ealgos = ua->ealgos;
2036 t->calgos = ua->calgos;
2037 err = km_query(x, t, xp);
2047 WARN(1, "BAD policy passed\n");
2054 #ifdef CONFIG_XFRM_MIGRATE
2055 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2056 struct xfrm_kmaddress *k,
2057 struct nlattr **attrs, int *num)
2059 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2060 struct xfrm_user_migrate *um;
2064 struct xfrm_user_kmaddress *uk;
2066 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2067 memcpy(&k->local, &uk->local, sizeof(k->local));
2068 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2069 k->family = uk->family;
2070 k->reserved = uk->reserved;
2074 num_migrate = nla_len(rt) / sizeof(*um);
2076 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2079 for (i = 0; i < num_migrate; i++, um++, ma++) {
2080 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2081 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2082 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2083 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2085 ma->proto = um->proto;
2086 ma->mode = um->mode;
2087 ma->reqid = um->reqid;
2089 ma->old_family = um->old_family;
2090 ma->new_family = um->new_family;
2097 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2098 struct nlattr **attrs)
2100 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2101 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2102 struct xfrm_kmaddress km, *kmp;
2106 struct net *net = sock_net(skb->sk);
2108 if (attrs[XFRMA_MIGRATE] == NULL)
2111 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2113 err = copy_from_user_policy_type(&type, attrs);
2117 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2124 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
2129 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2130 struct nlattr **attrs)
2132 return -ENOPROTOOPT;
2136 #ifdef CONFIG_XFRM_MIGRATE
2137 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2139 struct xfrm_user_migrate um;
2141 memset(&um, 0, sizeof(um));
2142 um.proto = m->proto;
2144 um.reqid = m->reqid;
2145 um.old_family = m->old_family;
2146 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2147 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2148 um.new_family = m->new_family;
2149 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2150 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2152 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2155 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2157 struct xfrm_user_kmaddress uk;
2159 memset(&uk, 0, sizeof(uk));
2160 uk.family = k->family;
2161 uk.reserved = k->reserved;
2162 memcpy(&uk.local, &k->local, sizeof(uk.local));
2163 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2165 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2168 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2170 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2171 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2172 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2173 + userpolicy_type_attrsize();
2176 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2177 int num_migrate, const struct xfrm_kmaddress *k,
2178 const struct xfrm_selector *sel, u8 dir, u8 type)
2180 const struct xfrm_migrate *mp;
2181 struct xfrm_userpolicy_id *pol_id;
2182 struct nlmsghdr *nlh;
2185 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2189 pol_id = nlmsg_data(nlh);
2190 /* copy data from selector, dir, and type to the pol_id */
2191 memset(pol_id, 0, sizeof(*pol_id));
2192 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2196 err = copy_to_user_kmaddress(k, skb);
2200 err = copy_to_user_policy_type(type, skb);
2203 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2204 err = copy_to_user_migrate(mp, skb);
2209 return nlmsg_end(skb, nlh);
2212 nlmsg_cancel(skb, nlh);
2216 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2217 const struct xfrm_migrate *m, int num_migrate,
2218 const struct xfrm_kmaddress *k)
2220 struct net *net = &init_net;
2221 struct sk_buff *skb;
2223 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2228 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2231 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2234 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2235 const struct xfrm_migrate *m, int num_migrate,
2236 const struct xfrm_kmaddress *k)
2238 return -ENOPROTOOPT;
2242 #define XMSGSIZE(type) sizeof(struct type)
2244 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2245 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2246 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2247 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2248 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2249 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2250 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2251 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2252 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2253 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2254 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2255 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2256 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2257 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2258 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2259 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2260 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2261 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2262 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2263 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2264 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2269 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2270 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2271 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2272 [XFRMA_LASTUSED] = { .type = NLA_U64},
2273 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2274 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2275 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2276 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2277 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2278 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2279 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2280 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2281 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2282 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2283 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2284 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2285 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2286 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2287 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2288 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2289 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2290 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2291 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2292 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2293 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2294 [XFRMA_PROTO] = { .type = NLA_U8 },
2295 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2298 static const struct xfrm_link {
2299 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2300 int (*dump)(struct sk_buff *, struct netlink_callback *);
2301 int (*done)(struct netlink_callback *);
2302 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2303 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2304 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2305 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2306 .dump = xfrm_dump_sa,
2307 .done = xfrm_dump_sa_done },
2308 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2309 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2310 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2311 .dump = xfrm_dump_policy,
2312 .done = xfrm_dump_policy_done },
2313 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2314 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2315 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2316 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2317 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2318 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2319 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2320 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2321 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2322 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2323 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2324 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2325 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2328 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2330 struct net *net = sock_net(skb->sk);
2331 struct nlattr *attrs[XFRMA_MAX+1];
2332 const struct xfrm_link *link;
2335 type = nlh->nlmsg_type;
2336 if (type > XFRM_MSG_MAX)
2339 type -= XFRM_MSG_BASE;
2340 link = &xfrm_dispatch[type];
2342 /* All operations require privileges, even GET */
2343 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2346 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2347 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2348 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2349 if (link->dump == NULL)
2353 struct netlink_dump_control c = {
2357 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2361 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2366 if (link->doit == NULL)
2369 return link->doit(skb, nlh, attrs);
2372 static void xfrm_netlink_rcv(struct sk_buff *skb)
2374 struct net *net = sock_net(skb->sk);
2376 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2377 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2378 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2381 static inline size_t xfrm_expire_msgsize(void)
2383 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2384 + nla_total_size(sizeof(struct xfrm_mark));
2387 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2389 struct xfrm_user_expire *ue;
2390 struct nlmsghdr *nlh;
2393 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2397 ue = nlmsg_data(nlh);
2398 copy_to_user_state(x, &ue->state);
2399 ue->hard = (c->data.hard != 0) ? 1 : 0;
2401 err = xfrm_mark_put(skb, &x->mark);
2405 return nlmsg_end(skb, nlh);
2408 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2410 struct net *net = xs_net(x);
2411 struct sk_buff *skb;
2413 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2417 if (build_expire(skb, x, c) < 0) {
2422 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2425 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2427 struct net *net = xs_net(x);
2428 struct sk_buff *skb;
2430 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2434 if (build_aevent(skb, x, c) < 0)
2437 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2440 static int xfrm_notify_sa_flush(const struct km_event *c)
2442 struct net *net = c->net;
2443 struct xfrm_usersa_flush *p;
2444 struct nlmsghdr *nlh;
2445 struct sk_buff *skb;
2446 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2448 skb = nlmsg_new(len, GFP_ATOMIC);
2452 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2458 p = nlmsg_data(nlh);
2459 p->proto = c->data.proto;
2461 nlmsg_end(skb, nlh);
2463 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2466 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2470 l += nla_total_size(aead_len(x->aead));
2472 l += nla_total_size(sizeof(struct xfrm_algo) +
2473 (x->aalg->alg_key_len + 7) / 8);
2474 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2477 l += nla_total_size(xfrm_alg_len(x->ealg));
2479 l += nla_total_size(sizeof(*x->calg));
2481 l += nla_total_size(sizeof(*x->encap));
2483 l += nla_total_size(sizeof(x->tfcpad));
2485 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2487 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2488 x->security->ctx_len);
2490 l += nla_total_size(sizeof(*x->coaddr));
2491 if (x->props.extra_flags)
2492 l += nla_total_size(sizeof(x->props.extra_flags));
2494 /* Must count x->lastused as it may become non-zero behind our back. */
2495 l += nla_total_size(sizeof(u64));
2500 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2502 struct net *net = xs_net(x);
2503 struct xfrm_usersa_info *p;
2504 struct xfrm_usersa_id *id;
2505 struct nlmsghdr *nlh;
2506 struct sk_buff *skb;
2507 int len = xfrm_sa_len(x);
2510 headlen = sizeof(*p);
2511 if (c->event == XFRM_MSG_DELSA) {
2512 len += nla_total_size(headlen);
2513 headlen = sizeof(*id);
2514 len += nla_total_size(sizeof(struct xfrm_mark));
2516 len += NLMSG_ALIGN(headlen);
2518 skb = nlmsg_new(len, GFP_ATOMIC);
2522 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2527 p = nlmsg_data(nlh);
2528 if (c->event == XFRM_MSG_DELSA) {
2529 struct nlattr *attr;
2531 id = nlmsg_data(nlh);
2532 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2533 id->spi = x->id.spi;
2534 id->family = x->props.family;
2535 id->proto = x->id.proto;
2537 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2544 err = copy_to_user_state_extra(x, p, skb);
2548 nlmsg_end(skb, nlh);
2550 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2557 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2561 case XFRM_MSG_EXPIRE:
2562 return xfrm_exp_state_notify(x, c);
2563 case XFRM_MSG_NEWAE:
2564 return xfrm_aevent_state_notify(x, c);
2565 case XFRM_MSG_DELSA:
2566 case XFRM_MSG_UPDSA:
2567 case XFRM_MSG_NEWSA:
2568 return xfrm_notify_sa(x, c);
2569 case XFRM_MSG_FLUSHSA:
2570 return xfrm_notify_sa_flush(c);
2572 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2581 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2582 struct xfrm_policy *xp)
2584 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2585 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2586 + nla_total_size(sizeof(struct xfrm_mark))
2587 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2588 + userpolicy_type_attrsize();
2591 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2592 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2594 __u32 seq = xfrm_get_acqseq();
2595 struct xfrm_user_acquire *ua;
2596 struct nlmsghdr *nlh;
2599 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2603 ua = nlmsg_data(nlh);
2604 memcpy(&ua->id, &x->id, sizeof(ua->id));
2605 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2606 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2607 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2608 ua->aalgos = xt->aalgos;
2609 ua->ealgos = xt->ealgos;
2610 ua->calgos = xt->calgos;
2611 ua->seq = x->km.seq = seq;
2613 err = copy_to_user_tmpl(xp, skb);
2615 err = copy_to_user_state_sec_ctx(x, skb);
2617 err = copy_to_user_policy_type(xp->type, skb);
2619 err = xfrm_mark_put(skb, &xp->mark);
2621 nlmsg_cancel(skb, nlh);
2625 return nlmsg_end(skb, nlh);
2628 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2629 struct xfrm_policy *xp)
2631 struct net *net = xs_net(x);
2632 struct sk_buff *skb;
2634 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2638 if (build_acquire(skb, x, xt, xp) < 0)
2641 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2644 /* User gives us xfrm_user_policy_info followed by an array of 0
2645 * or more templates.
2647 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2648 u8 *data, int len, int *dir)
2650 struct net *net = sock_net(sk);
2651 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2652 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2653 struct xfrm_policy *xp;
2656 switch (sk->sk_family) {
2658 if (opt != IP_XFRM_POLICY) {
2663 #if IS_ENABLED(CONFIG_IPV6)
2665 if (opt != IPV6_XFRM_POLICY) {
2678 if (len < sizeof(*p) ||
2679 verify_newpolicy_info(p))
2682 nr = ((len - sizeof(*p)) / sizeof(*ut));
2683 if (validate_tmpl(nr, ut, p->sel.family))
2686 if (p->dir > XFRM_POLICY_OUT)
2689 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2695 copy_from_user_policy(xp, p);
2696 xp->type = XFRM_POLICY_TYPE_MAIN;
2697 copy_templates(xp, ut, nr);
2704 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2706 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2707 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2708 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2709 + nla_total_size(sizeof(struct xfrm_mark))
2710 + userpolicy_type_attrsize();
2713 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2714 int dir, const struct km_event *c)
2716 struct xfrm_user_polexpire *upe;
2717 int hard = c->data.hard;
2718 struct nlmsghdr *nlh;
2721 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2725 upe = nlmsg_data(nlh);
2726 copy_to_user_policy(xp, &upe->pol, dir);
2727 err = copy_to_user_tmpl(xp, skb);
2729 err = copy_to_user_sec_ctx(xp, skb);
2731 err = copy_to_user_policy_type(xp->type, skb);
2733 err = xfrm_mark_put(skb, &xp->mark);
2735 nlmsg_cancel(skb, nlh);
2740 return nlmsg_end(skb, nlh);
2743 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2745 struct net *net = xp_net(xp);
2746 struct sk_buff *skb;
2748 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2752 if (build_polexpire(skb, xp, dir, c) < 0)
2755 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2758 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2760 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2761 struct net *net = xp_net(xp);
2762 struct xfrm_userpolicy_info *p;
2763 struct xfrm_userpolicy_id *id;
2764 struct nlmsghdr *nlh;
2765 struct sk_buff *skb;
2768 headlen = sizeof(*p);
2769 if (c->event == XFRM_MSG_DELPOLICY) {
2770 len += nla_total_size(headlen);
2771 headlen = sizeof(*id);
2773 len += userpolicy_type_attrsize();
2774 len += nla_total_size(sizeof(struct xfrm_mark));
2775 len += NLMSG_ALIGN(headlen);
2777 skb = nlmsg_new(len, GFP_ATOMIC);
2781 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2786 p = nlmsg_data(nlh);
2787 if (c->event == XFRM_MSG_DELPOLICY) {
2788 struct nlattr *attr;
2790 id = nlmsg_data(nlh);
2791 memset(id, 0, sizeof(*id));
2794 id->index = xp->index;
2796 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2798 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2806 copy_to_user_policy(xp, p, dir);
2807 err = copy_to_user_tmpl(xp, skb);
2809 err = copy_to_user_policy_type(xp->type, skb);
2811 err = xfrm_mark_put(skb, &xp->mark);
2815 nlmsg_end(skb, nlh);
2817 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2824 static int xfrm_notify_policy_flush(const struct km_event *c)
2826 struct net *net = c->net;
2827 struct nlmsghdr *nlh;
2828 struct sk_buff *skb;
2831 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2835 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2839 err = copy_to_user_policy_type(c->data.type, skb);
2843 nlmsg_end(skb, nlh);
2845 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2852 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2856 case XFRM_MSG_NEWPOLICY:
2857 case XFRM_MSG_UPDPOLICY:
2858 case XFRM_MSG_DELPOLICY:
2859 return xfrm_notify_policy(xp, dir, c);
2860 case XFRM_MSG_FLUSHPOLICY:
2861 return xfrm_notify_policy_flush(c);
2862 case XFRM_MSG_POLEXPIRE:
2863 return xfrm_exp_policy_notify(xp, dir, c);
2865 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2873 static inline size_t xfrm_report_msgsize(void)
2875 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2878 static int build_report(struct sk_buff *skb, u8 proto,
2879 struct xfrm_selector *sel, xfrm_address_t *addr)
2881 struct xfrm_user_report *ur;
2882 struct nlmsghdr *nlh;
2884 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2888 ur = nlmsg_data(nlh);
2890 memcpy(&ur->sel, sel, sizeof(ur->sel));
2893 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2895 nlmsg_cancel(skb, nlh);
2899 return nlmsg_end(skb, nlh);
2902 static int xfrm_send_report(struct net *net, u8 proto,
2903 struct xfrm_selector *sel, xfrm_address_t *addr)
2905 struct sk_buff *skb;
2907 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2911 if (build_report(skb, proto, sel, addr) < 0)
2914 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2917 static inline size_t xfrm_mapping_msgsize(void)
2919 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2922 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2923 xfrm_address_t *new_saddr, __be16 new_sport)
2925 struct xfrm_user_mapping *um;
2926 struct nlmsghdr *nlh;
2928 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2932 um = nlmsg_data(nlh);
2934 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2935 um->id.spi = x->id.spi;
2936 um->id.family = x->props.family;
2937 um->id.proto = x->id.proto;
2938 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2939 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2940 um->new_sport = new_sport;
2941 um->old_sport = x->encap->encap_sport;
2942 um->reqid = x->props.reqid;
2944 return nlmsg_end(skb, nlh);
2947 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2950 struct net *net = xs_net(x);
2951 struct sk_buff *skb;
2953 if (x->id.proto != IPPROTO_ESP)
2959 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2963 if (build_mapping(skb, x, ipaddr, sport) < 0)
2966 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2969 static bool xfrm_is_alive(const struct km_event *c)
2971 return (bool)xfrm_acquire_is_on(c->net);
2974 static struct xfrm_mgr netlink_mgr = {
2976 .notify = xfrm_send_state_notify,
2977 .acquire = xfrm_send_acquire,
2978 .compile_policy = xfrm_compile_policy,
2979 .notify_policy = xfrm_send_policy_notify,
2980 .report = xfrm_send_report,
2981 .migrate = xfrm_send_migrate,
2982 .new_mapping = xfrm_send_mapping,
2983 .is_alive = xfrm_is_alive,
2986 static int __net_init xfrm_user_net_init(struct net *net)
2989 struct netlink_kernel_cfg cfg = {
2990 .groups = XFRMNLGRP_MAX,
2991 .input = xfrm_netlink_rcv,
2994 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
2997 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2998 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3002 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3005 list_for_each_entry(net, net_exit_list, exit_list)
3006 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3008 list_for_each_entry(net, net_exit_list, exit_list)
3009 netlink_kernel_release(net->xfrm.nlsk_stash);
3012 static struct pernet_operations xfrm_user_net_ops = {
3013 .init = xfrm_user_net_init,
3014 .exit_batch = xfrm_user_net_exit,
3017 static int __init xfrm_user_init(void)
3021 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3023 rv = register_pernet_subsys(&xfrm_user_net_ops);
3026 rv = xfrm_register_km(&netlink_mgr);
3028 unregister_pernet_subsys(&xfrm_user_net_ops);
3032 static void __exit xfrm_user_exit(void)
3034 xfrm_unregister_km(&netlink_mgr);
3035 unregister_pernet_subsys(&xfrm_user_net_ops);
3038 module_init(xfrm_user_init);
3039 module_exit(xfrm_user_exit);
3040 MODULE_LICENSE("GPL");
3041 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);