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>
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[CRYPTO_MAX_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[CRYPTO_MAX_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[CRYPTO_MAX_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 if (attrs[XFRMA_OUTPUT_MARK])
588 x->props.output_mark = nla_get_u32(attrs[XFRMA_OUTPUT_MARK]);
590 err = __xfrm_init_state(x, false);
594 if (attrs[XFRMA_SEC_CTX] &&
595 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
598 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
599 attrs[XFRMA_REPLAY_ESN_VAL])))
603 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
604 /* sysctl_xfrm_aevent_etime is in 100ms units */
605 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
607 if ((err = xfrm_init_replay(x)))
610 /* override default values from above */
611 xfrm_update_ae_params(x, attrs, 0);
616 x->km.state = XFRM_STATE_DEAD;
623 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
624 struct nlattr **attrs)
626 struct net *net = sock_net(skb->sk);
627 struct xfrm_usersa_info *p = nlmsg_data(nlh);
628 struct xfrm_state *x;
632 err = verify_newsa_info(p, attrs);
636 x = xfrm_state_construct(net, p, attrs, &err);
641 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
642 err = xfrm_state_add(x);
644 err = xfrm_state_update(x);
646 xfrm_audit_state_add(x, err ? 0 : 1, true);
649 x->km.state = XFRM_STATE_DEAD;
654 c.seq = nlh->nlmsg_seq;
655 c.portid = nlh->nlmsg_pid;
656 c.event = nlh->nlmsg_type;
658 km_state_notify(x, &c);
664 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
665 struct xfrm_usersa_id *p,
666 struct nlattr **attrs,
669 struct xfrm_state *x = NULL;
672 u32 mark = xfrm_mark_get(attrs, &m);
674 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
676 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
678 xfrm_address_t *saddr = NULL;
680 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
687 x = xfrm_state_lookup_byaddr(net, mark,
689 p->proto, p->family);
698 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
699 struct nlattr **attrs)
701 struct net *net = sock_net(skb->sk);
702 struct xfrm_state *x;
705 struct xfrm_usersa_id *p = nlmsg_data(nlh);
707 x = xfrm_user_state_lookup(net, p, attrs, &err);
711 if ((err = security_xfrm_state_delete(x)) != 0)
714 if (xfrm_state_kern(x)) {
719 err = xfrm_state_delete(x);
724 c.seq = nlh->nlmsg_seq;
725 c.portid = nlh->nlmsg_pid;
726 c.event = nlh->nlmsg_type;
727 km_state_notify(x, &c);
730 xfrm_audit_state_delete(x, err ? 0 : 1, true);
735 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
737 memset(p, 0, sizeof(*p));
738 memcpy(&p->id, &x->id, sizeof(p->id));
739 memcpy(&p->sel, &x->sel, sizeof(p->sel));
740 memcpy(&p->lft, &x->lft, sizeof(p->lft));
741 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
742 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
743 put_unaligned(x->stats.replay, &p->stats.replay);
744 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
745 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
746 p->mode = x->props.mode;
747 p->replay_window = x->props.replay_window;
748 p->reqid = x->props.reqid;
749 p->family = x->props.family;
750 p->flags = x->props.flags;
754 struct xfrm_dump_info {
755 struct sk_buff *in_skb;
756 struct sk_buff *out_skb;
761 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
763 struct xfrm_user_sec_ctx *uctx;
765 int ctx_size = sizeof(*uctx) + s->ctx_len;
767 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
771 uctx = nla_data(attr);
772 uctx->exttype = XFRMA_SEC_CTX;
773 uctx->len = ctx_size;
774 uctx->ctx_doi = s->ctx_doi;
775 uctx->ctx_alg = s->ctx_alg;
776 uctx->ctx_len = s->ctx_len;
777 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
782 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
784 struct xfrm_algo *algo;
787 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
788 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
792 algo = nla_data(nla);
793 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
794 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
795 algo->alg_key_len = auth->alg_key_len;
800 /* Don't change this without updating xfrm_sa_len! */
801 static int copy_to_user_state_extra(struct xfrm_state *x,
802 struct xfrm_usersa_info *p,
807 copy_to_user_state(x, p);
809 if (x->props.extra_flags) {
810 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
811 x->props.extra_flags);
817 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
822 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
827 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
832 ret = copy_to_user_auth(x->aalg, skb);
834 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
835 xfrm_alg_auth_len(x->aalg), x->aalg);
840 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
845 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
850 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
855 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
859 ret = xfrm_mark_put(skb, &x->mark);
863 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
864 xfrm_replay_state_esn_len(x->replay_esn),
867 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
871 if (x->props.output_mark) {
872 ret = nla_put_u32(skb, XFRMA_OUTPUT_MARK, x->props.output_mark);
877 ret = copy_sec_ctx(x->security, skb);
882 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
884 struct xfrm_dump_info *sp = ptr;
885 struct sk_buff *in_skb = sp->in_skb;
886 struct sk_buff *skb = sp->out_skb;
887 struct xfrm_usersa_info *p;
888 struct nlmsghdr *nlh;
891 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
892 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
898 err = copy_to_user_state_extra(x, p, skb);
900 nlmsg_cancel(skb, nlh);
907 static int xfrm_dump_sa_done(struct netlink_callback *cb)
909 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
910 struct sock *sk = cb->skb->sk;
911 struct net *net = sock_net(sk);
913 xfrm_state_walk_done(walk, net);
917 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
918 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
920 struct net *net = sock_net(skb->sk);
921 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
922 struct xfrm_dump_info info;
924 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
925 sizeof(cb->args) - sizeof(cb->args[0]));
927 info.in_skb = cb->skb;
929 info.nlmsg_seq = cb->nlh->nlmsg_seq;
930 info.nlmsg_flags = NLM_F_MULTI;
933 struct nlattr *attrs[XFRMA_MAX+1];
934 struct xfrm_address_filter *filter = NULL;
940 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
945 if (attrs[XFRMA_ADDRESS_FILTER]) {
946 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
947 sizeof(*filter), GFP_KERNEL);
952 if (attrs[XFRMA_PROTO])
953 proto = nla_get_u8(attrs[XFRMA_PROTO]);
955 xfrm_state_walk_init(walk, proto, filter);
958 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
963 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
964 struct xfrm_state *x, u32 seq)
966 struct xfrm_dump_info info;
970 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
972 return ERR_PTR(-ENOMEM);
974 info.in_skb = in_skb;
976 info.nlmsg_seq = seq;
977 info.nlmsg_flags = 0;
979 err = dump_one_state(x, 0, &info);
988 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
989 * Must be called with RCU read lock.
991 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
992 u32 pid, unsigned int group)
994 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
997 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1002 static inline size_t xfrm_spdinfo_msgsize(void)
1004 return NLMSG_ALIGN(4)
1005 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1006 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1007 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1008 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1011 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1012 u32 portid, u32 seq, u32 flags)
1014 struct xfrmk_spdinfo si;
1015 struct xfrmu_spdinfo spc;
1016 struct xfrmu_spdhinfo sph;
1017 struct xfrmu_spdhthresh spt4, spt6;
1018 struct nlmsghdr *nlh;
1023 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1024 if (nlh == NULL) /* shouldn't really happen ... */
1027 f = nlmsg_data(nlh);
1029 xfrm_spd_getinfo(net, &si);
1030 spc.incnt = si.incnt;
1031 spc.outcnt = si.outcnt;
1032 spc.fwdcnt = si.fwdcnt;
1033 spc.inscnt = si.inscnt;
1034 spc.outscnt = si.outscnt;
1035 spc.fwdscnt = si.fwdscnt;
1036 sph.spdhcnt = si.spdhcnt;
1037 sph.spdhmcnt = si.spdhmcnt;
1040 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1042 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1043 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1044 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1045 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1046 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1048 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1050 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1052 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1054 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1056 nlmsg_cancel(skb, nlh);
1060 nlmsg_end(skb, nlh);
1064 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1065 struct nlattr **attrs)
1067 struct net *net = sock_net(skb->sk);
1068 struct xfrmu_spdhthresh *thresh4 = NULL;
1069 struct xfrmu_spdhthresh *thresh6 = NULL;
1071 /* selector prefixlen thresholds to hash policies */
1072 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1073 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1075 if (nla_len(rta) < sizeof(*thresh4))
1077 thresh4 = nla_data(rta);
1078 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1081 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1082 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1084 if (nla_len(rta) < sizeof(*thresh6))
1086 thresh6 = nla_data(rta);
1087 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1091 if (thresh4 || thresh6) {
1092 write_seqlock(&net->xfrm.policy_hthresh.lock);
1094 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1095 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1098 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1099 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1101 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1103 xfrm_policy_hash_rebuild(net);
1109 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1110 struct nlattr **attrs)
1112 struct net *net = sock_net(skb->sk);
1113 struct sk_buff *r_skb;
1114 u32 *flags = nlmsg_data(nlh);
1115 u32 sportid = NETLINK_CB(skb).portid;
1116 u32 seq = nlh->nlmsg_seq;
1118 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1122 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
1125 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1128 static inline size_t xfrm_sadinfo_msgsize(void)
1130 return NLMSG_ALIGN(4)
1131 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1132 + nla_total_size(4); /* XFRMA_SAD_CNT */
1135 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1136 u32 portid, u32 seq, u32 flags)
1138 struct xfrmk_sadinfo si;
1139 struct xfrmu_sadhinfo sh;
1140 struct nlmsghdr *nlh;
1144 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1145 if (nlh == NULL) /* shouldn't really happen ... */
1148 f = nlmsg_data(nlh);
1150 xfrm_sad_getinfo(net, &si);
1152 sh.sadhmcnt = si.sadhmcnt;
1153 sh.sadhcnt = si.sadhcnt;
1155 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1157 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1159 nlmsg_cancel(skb, nlh);
1163 nlmsg_end(skb, nlh);
1167 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1168 struct nlattr **attrs)
1170 struct net *net = sock_net(skb->sk);
1171 struct sk_buff *r_skb;
1172 u32 *flags = nlmsg_data(nlh);
1173 u32 sportid = NETLINK_CB(skb).portid;
1174 u32 seq = nlh->nlmsg_seq;
1176 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1180 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
1183 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1186 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1187 struct nlattr **attrs)
1189 struct net *net = sock_net(skb->sk);
1190 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1191 struct xfrm_state *x;
1192 struct sk_buff *resp_skb;
1195 x = xfrm_user_state_lookup(net, p, attrs, &err);
1199 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1200 if (IS_ERR(resp_skb)) {
1201 err = PTR_ERR(resp_skb);
1203 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1210 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1211 struct nlattr **attrs)
1213 struct net *net = sock_net(skb->sk);
1214 struct xfrm_state *x;
1215 struct xfrm_userspi_info *p;
1216 struct sk_buff *resp_skb;
1217 xfrm_address_t *daddr;
1223 p = nlmsg_data(nlh);
1224 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1228 family = p->info.family;
1229 daddr = &p->info.id.daddr;
1233 mark = xfrm_mark_get(attrs, &m);
1235 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1236 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1243 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1244 p->info.id.proto, daddr,
1251 err = xfrm_alloc_spi(x, p->min, p->max);
1255 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1256 if (IS_ERR(resp_skb)) {
1257 err = PTR_ERR(resp_skb);
1261 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1269 static int verify_policy_dir(u8 dir)
1272 case XFRM_POLICY_IN:
1273 case XFRM_POLICY_OUT:
1274 case XFRM_POLICY_FWD:
1284 static int verify_policy_type(u8 type)
1287 case XFRM_POLICY_TYPE_MAIN:
1288 #ifdef CONFIG_XFRM_SUB_POLICY
1289 case XFRM_POLICY_TYPE_SUB:
1300 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1305 case XFRM_SHARE_ANY:
1306 case XFRM_SHARE_SESSION:
1307 case XFRM_SHARE_USER:
1308 case XFRM_SHARE_UNIQUE:
1315 switch (p->action) {
1316 case XFRM_POLICY_ALLOW:
1317 case XFRM_POLICY_BLOCK:
1324 switch (p->sel.family) {
1329 #if IS_ENABLED(CONFIG_IPV6)
1332 return -EAFNOSUPPORT;
1339 ret = verify_policy_dir(p->dir);
1342 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1348 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1350 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1351 struct xfrm_user_sec_ctx *uctx;
1356 uctx = nla_data(rt);
1357 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1360 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1366 for (i = 0; i < nr; i++, ut++) {
1367 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1369 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1370 memcpy(&t->saddr, &ut->saddr,
1371 sizeof(xfrm_address_t));
1372 t->reqid = ut->reqid;
1374 t->share = ut->share;
1375 t->optional = ut->optional;
1376 t->aalgos = ut->aalgos;
1377 t->ealgos = ut->ealgos;
1378 t->calgos = ut->calgos;
1379 /* If all masks are ~0, then we allow all algorithms. */
1380 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1381 t->encap_family = ut->family;
1385 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1390 if (nr > XFRM_MAX_DEPTH)
1393 prev_family = family;
1395 for (i = 0; i < nr; i++) {
1396 /* We never validated the ut->family value, so many
1397 * applications simply leave it at zero. The check was
1398 * never made and ut->family was ignored because all
1399 * templates could be assumed to have the same family as
1400 * the policy itself. Now that we will have ipv4-in-ipv6
1401 * and ipv6-in-ipv4 tunnels, this is no longer true.
1404 ut[i].family = family;
1406 if ((ut[i].mode == XFRM_MODE_TRANSPORT) &&
1407 (ut[i].family != prev_family))
1410 prev_family = ut[i].family;
1412 switch (ut[i].family) {
1415 #if IS_ENABLED(CONFIG_IPV6)
1423 switch (ut[i].id.proto) {
1427 #if IS_ENABLED(CONFIG_IPV6)
1428 case IPPROTO_ROUTING:
1429 case IPPROTO_DSTOPTS:
1431 case IPSEC_PROTO_ANY:
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;
1688 struct net *net = sock_net(cb->skb->sk);
1690 xfrm_policy_walk_done(walk, net);
1694 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1696 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1698 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1700 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1704 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1706 struct net *net = sock_net(skb->sk);
1707 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1708 struct xfrm_dump_info info;
1710 info.in_skb = cb->skb;
1712 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1713 info.nlmsg_flags = NLM_F_MULTI;
1715 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1720 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1721 struct xfrm_policy *xp,
1724 struct xfrm_dump_info info;
1725 struct sk_buff *skb;
1728 err = verify_policy_dir(dir);
1730 return ERR_PTR(err);
1732 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1734 return ERR_PTR(-ENOMEM);
1736 info.in_skb = in_skb;
1738 info.nlmsg_seq = seq;
1739 info.nlmsg_flags = 0;
1741 err = dump_one_policy(xp, dir, 0, &info);
1744 return ERR_PTR(err);
1750 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1751 struct nlattr **attrs)
1753 struct net *net = sock_net(skb->sk);
1754 struct xfrm_policy *xp;
1755 struct xfrm_userpolicy_id *p;
1756 u8 type = XFRM_POLICY_TYPE_MAIN;
1761 u32 mark = xfrm_mark_get(attrs, &m);
1763 p = nlmsg_data(nlh);
1764 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1766 err = copy_from_user_policy_type(&type, attrs);
1770 err = verify_policy_dir(p->dir);
1775 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1777 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1778 struct xfrm_sec_ctx *ctx;
1780 err = verify_sec_ctx_len(attrs);
1786 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1788 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1792 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1794 security_xfrm_policy_free(ctx);
1800 struct sk_buff *resp_skb;
1802 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1803 if (IS_ERR(resp_skb)) {
1804 err = PTR_ERR(resp_skb);
1806 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1807 NETLINK_CB(skb).portid);
1810 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1815 c.data.byid = p->index;
1816 c.event = nlh->nlmsg_type;
1817 c.seq = nlh->nlmsg_seq;
1818 c.portid = nlh->nlmsg_pid;
1819 km_policy_notify(xp, p->dir, &c);
1824 if (delete && err == 0)
1825 xfrm_garbage_collect(net);
1829 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1830 struct nlattr **attrs)
1832 struct net *net = sock_net(skb->sk);
1834 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1837 err = xfrm_state_flush(net, p->proto, true);
1839 if (err == -ESRCH) /* empty table */
1843 c.data.proto = p->proto;
1844 c.event = nlh->nlmsg_type;
1845 c.seq = nlh->nlmsg_seq;
1846 c.portid = nlh->nlmsg_pid;
1848 km_state_notify(NULL, &c);
1853 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1855 size_t replay_size = x->replay_esn ?
1856 xfrm_replay_state_esn_len(x->replay_esn) :
1857 sizeof(struct xfrm_replay_state);
1859 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1860 + nla_total_size(replay_size)
1861 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1862 + nla_total_size(sizeof(struct xfrm_mark))
1863 + nla_total_size(4) /* XFRM_AE_RTHR */
1864 + nla_total_size(4); /* XFRM_AE_ETHR */
1867 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1869 struct xfrm_aevent_id *id;
1870 struct nlmsghdr *nlh;
1873 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1877 id = nlmsg_data(nlh);
1878 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1879 id->sa_id.spi = x->id.spi;
1880 id->sa_id.family = x->props.family;
1881 id->sa_id.proto = x->id.proto;
1882 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1883 id->reqid = x->props.reqid;
1884 id->flags = c->data.aevent;
1886 if (x->replay_esn) {
1887 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1888 xfrm_replay_state_esn_len(x->replay_esn),
1891 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1896 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1900 if (id->flags & XFRM_AE_RTHR) {
1901 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1905 if (id->flags & XFRM_AE_ETHR) {
1906 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1907 x->replay_maxage * 10 / HZ);
1911 err = xfrm_mark_put(skb, &x->mark);
1915 nlmsg_end(skb, nlh);
1919 nlmsg_cancel(skb, nlh);
1923 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1924 struct nlattr **attrs)
1926 struct net *net = sock_net(skb->sk);
1927 struct xfrm_state *x;
1928 struct sk_buff *r_skb;
1933 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1934 struct xfrm_usersa_id *id = &p->sa_id;
1936 mark = xfrm_mark_get(attrs, &m);
1938 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1942 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1943 if (r_skb == NULL) {
1949 * XXX: is this lock really needed - none of the other
1950 * gets lock (the concern is things getting updated
1951 * while we are still reading) - jhs
1953 spin_lock_bh(&x->lock);
1954 c.data.aevent = p->flags;
1955 c.seq = nlh->nlmsg_seq;
1956 c.portid = nlh->nlmsg_pid;
1958 if (build_aevent(r_skb, x, &c) < 0)
1960 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
1961 spin_unlock_bh(&x->lock);
1966 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1967 struct nlattr **attrs)
1969 struct net *net = sock_net(skb->sk);
1970 struct xfrm_state *x;
1975 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1976 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1977 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1978 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1979 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
1980 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
1982 if (!lt && !rp && !re && !et && !rt)
1985 /* pedantic mode - thou shalt sayeth replaceth */
1986 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1989 mark = xfrm_mark_get(attrs, &m);
1991 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1995 if (x->km.state != XFRM_STATE_VALID)
1998 err = xfrm_replay_verify_len(x->replay_esn, re);
2002 spin_lock_bh(&x->lock);
2003 xfrm_update_ae_params(x, attrs, 1);
2004 spin_unlock_bh(&x->lock);
2006 c.event = nlh->nlmsg_type;
2007 c.seq = nlh->nlmsg_seq;
2008 c.portid = nlh->nlmsg_pid;
2009 c.data.aevent = XFRM_AE_CU;
2010 km_state_notify(x, &c);
2017 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2018 struct nlattr **attrs)
2020 struct net *net = sock_net(skb->sk);
2022 u8 type = XFRM_POLICY_TYPE_MAIN;
2025 err = copy_from_user_policy_type(&type, attrs);
2029 err = xfrm_policy_flush(net, type, true);
2031 if (err == -ESRCH) /* empty table */
2037 c.event = nlh->nlmsg_type;
2038 c.seq = nlh->nlmsg_seq;
2039 c.portid = nlh->nlmsg_pid;
2041 km_policy_notify(NULL, 0, &c);
2045 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2046 struct nlattr **attrs)
2048 struct net *net = sock_net(skb->sk);
2049 struct xfrm_policy *xp;
2050 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2051 struct xfrm_userpolicy_info *p = &up->pol;
2052 u8 type = XFRM_POLICY_TYPE_MAIN;
2055 u32 mark = xfrm_mark_get(attrs, &m);
2057 err = copy_from_user_policy_type(&type, attrs);
2061 err = verify_policy_dir(p->dir);
2066 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
2068 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2069 struct xfrm_sec_ctx *ctx;
2071 err = verify_sec_ctx_len(attrs);
2077 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2079 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2083 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
2084 &p->sel, ctx, 0, &err);
2085 security_xfrm_policy_free(ctx);
2090 if (unlikely(xp->walk.dead))
2095 xfrm_policy_delete(xp, p->dir);
2096 xfrm_audit_policy_delete(xp, 1, true);
2098 // reset the timers here?
2099 WARN(1, "Don't know what to do with soft policy expire\n");
2101 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2108 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2109 struct nlattr **attrs)
2111 struct net *net = sock_net(skb->sk);
2112 struct xfrm_state *x;
2114 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2115 struct xfrm_usersa_info *p = &ue->state;
2117 u32 mark = xfrm_mark_get(attrs, &m);
2119 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2125 spin_lock_bh(&x->lock);
2127 if (x->km.state != XFRM_STATE_VALID)
2129 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2132 __xfrm_state_delete(x);
2133 xfrm_audit_state_delete(x, 1, true);
2137 spin_unlock_bh(&x->lock);
2142 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2143 struct nlattr **attrs)
2145 struct net *net = sock_net(skb->sk);
2146 struct xfrm_policy *xp;
2147 struct xfrm_user_tmpl *ut;
2149 struct nlattr *rt = attrs[XFRMA_TMPL];
2150 struct xfrm_mark mark;
2152 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2153 struct xfrm_state *x = xfrm_state_alloc(net);
2159 xfrm_mark_get(attrs, &mark);
2161 err = verify_newpolicy_info(&ua->policy);
2166 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2170 memcpy(&x->id, &ua->id, sizeof(ua->id));
2171 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2172 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2173 xp->mark.m = x->mark.m = mark.m;
2174 xp->mark.v = x->mark.v = mark.v;
2176 /* extract the templates and for each call km_key */
2177 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2178 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2179 memcpy(&x->id, &t->id, sizeof(x->id));
2180 x->props.mode = t->mode;
2181 x->props.reqid = t->reqid;
2182 x->props.family = ut->family;
2183 t->aalgos = ua->aalgos;
2184 t->ealgos = ua->ealgos;
2185 t->calgos = ua->calgos;
2186 err = km_query(x, t, xp);
2196 WARN(1, "BAD policy passed\n");
2203 #ifdef CONFIG_XFRM_MIGRATE
2204 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2205 struct xfrm_kmaddress *k,
2206 struct nlattr **attrs, int *num)
2208 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2209 struct xfrm_user_migrate *um;
2213 struct xfrm_user_kmaddress *uk;
2215 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2216 memcpy(&k->local, &uk->local, sizeof(k->local));
2217 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2218 k->family = uk->family;
2219 k->reserved = uk->reserved;
2223 num_migrate = nla_len(rt) / sizeof(*um);
2225 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2228 for (i = 0; i < num_migrate; i++, um++, ma++) {
2229 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2230 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2231 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2232 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2234 ma->proto = um->proto;
2235 ma->mode = um->mode;
2236 ma->reqid = um->reqid;
2238 ma->old_family = um->old_family;
2239 ma->new_family = um->new_family;
2246 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2247 struct nlattr **attrs)
2249 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2250 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2251 struct xfrm_kmaddress km, *kmp;
2255 struct net *net = sock_net(skb->sk);
2257 err = verify_policy_dir(pi->dir);
2261 if (attrs[XFRMA_MIGRATE] == NULL)
2264 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2266 err = copy_from_user_policy_type(&type, attrs);
2270 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2277 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
2282 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2283 struct nlattr **attrs)
2285 return -ENOPROTOOPT;
2289 #ifdef CONFIG_XFRM_MIGRATE
2290 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2292 struct xfrm_user_migrate um;
2294 memset(&um, 0, sizeof(um));
2295 um.proto = m->proto;
2297 um.reqid = m->reqid;
2298 um.old_family = m->old_family;
2299 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2300 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2301 um.new_family = m->new_family;
2302 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2303 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2305 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2308 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2310 struct xfrm_user_kmaddress uk;
2312 memset(&uk, 0, sizeof(uk));
2313 uk.family = k->family;
2314 uk.reserved = k->reserved;
2315 memcpy(&uk.local, &k->local, sizeof(uk.local));
2316 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2318 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2321 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2323 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2324 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2325 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2326 + userpolicy_type_attrsize();
2329 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2330 int num_migrate, const struct xfrm_kmaddress *k,
2331 const struct xfrm_selector *sel, u8 dir, u8 type)
2333 const struct xfrm_migrate *mp;
2334 struct xfrm_userpolicy_id *pol_id;
2335 struct nlmsghdr *nlh;
2338 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2342 pol_id = nlmsg_data(nlh);
2343 /* copy data from selector, dir, and type to the pol_id */
2344 memset(pol_id, 0, sizeof(*pol_id));
2345 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2349 err = copy_to_user_kmaddress(k, skb);
2353 err = copy_to_user_policy_type(type, skb);
2356 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2357 err = copy_to_user_migrate(mp, skb);
2362 nlmsg_end(skb, nlh);
2366 nlmsg_cancel(skb, nlh);
2370 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2371 const struct xfrm_migrate *m, int num_migrate,
2372 const struct xfrm_kmaddress *k)
2374 struct net *net = &init_net;
2375 struct sk_buff *skb;
2378 err = verify_policy_dir(dir);
2382 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2387 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2390 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2393 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2394 const struct xfrm_migrate *m, int num_migrate,
2395 const struct xfrm_kmaddress *k)
2397 return -ENOPROTOOPT;
2401 #define XMSGSIZE(type) sizeof(struct type)
2403 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2404 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2405 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2406 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2407 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2408 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2409 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2410 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2411 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2412 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2413 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2414 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2415 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2416 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2417 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2418 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2419 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2420 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2421 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2422 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2423 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2424 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2429 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2430 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2431 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2432 [XFRMA_LASTUSED] = { .type = NLA_U64},
2433 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2434 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2435 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2436 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2437 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2438 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2439 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2440 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2441 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2442 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2443 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2444 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2445 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2446 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2447 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2448 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2449 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2450 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2451 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2452 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2453 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2454 [XFRMA_PROTO] = { .type = NLA_U8 },
2455 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2456 [XFRMA_OUTPUT_MARK] = { .len = NLA_U32 },
2459 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2460 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2461 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2464 static const struct xfrm_link {
2465 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2466 int (*start)(struct netlink_callback *);
2467 int (*dump)(struct sk_buff *, struct netlink_callback *);
2468 int (*done)(struct netlink_callback *);
2469 const struct nla_policy *nla_pol;
2471 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2472 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2473 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2474 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2475 .dump = xfrm_dump_sa,
2476 .done = xfrm_dump_sa_done },
2477 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2478 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2479 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2480 .start = xfrm_dump_policy_start,
2481 .dump = xfrm_dump_policy,
2482 .done = xfrm_dump_policy_done },
2483 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2484 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2485 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2486 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2487 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2488 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2489 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2490 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2491 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2492 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2493 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2494 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2495 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2496 .nla_pol = xfrma_spd_policy,
2497 .nla_max = XFRMA_SPD_MAX },
2498 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2501 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2503 struct net *net = sock_net(skb->sk);
2504 struct nlattr *attrs[XFRMA_MAX+1];
2505 const struct xfrm_link *link;
2508 #ifdef CONFIG_COMPAT
2509 if (is_compat_task())
2513 type = nlh->nlmsg_type;
2514 if (type > XFRM_MSG_MAX)
2517 type -= XFRM_MSG_BASE;
2518 link = &xfrm_dispatch[type];
2520 /* All operations require privileges, even GET */
2521 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2524 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2525 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2526 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2527 if (link->dump == NULL)
2531 struct netlink_dump_control c = {
2532 .start = link->start,
2536 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2540 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2541 link->nla_max ? : XFRMA_MAX,
2542 link->nla_pol ? : xfrma_policy);
2546 if (link->doit == NULL)
2549 return link->doit(skb, nlh, attrs);
2552 static void xfrm_netlink_rcv(struct sk_buff *skb)
2554 struct net *net = sock_net(skb->sk);
2556 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2557 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2558 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2561 static inline size_t xfrm_expire_msgsize(void)
2563 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2564 + nla_total_size(sizeof(struct xfrm_mark));
2567 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2569 struct xfrm_user_expire *ue;
2570 struct nlmsghdr *nlh;
2573 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2577 ue = nlmsg_data(nlh);
2578 copy_to_user_state(x, &ue->state);
2579 ue->hard = (c->data.hard != 0) ? 1 : 0;
2581 err = xfrm_mark_put(skb, &x->mark);
2585 nlmsg_end(skb, nlh);
2589 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2591 struct net *net = xs_net(x);
2592 struct sk_buff *skb;
2594 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2598 if (build_expire(skb, x, c) < 0) {
2603 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2606 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2608 struct net *net = xs_net(x);
2609 struct sk_buff *skb;
2611 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2615 if (build_aevent(skb, x, c) < 0)
2618 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2621 static int xfrm_notify_sa_flush(const struct km_event *c)
2623 struct net *net = c->net;
2624 struct xfrm_usersa_flush *p;
2625 struct nlmsghdr *nlh;
2626 struct sk_buff *skb;
2627 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2629 skb = nlmsg_new(len, GFP_ATOMIC);
2633 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2639 p = nlmsg_data(nlh);
2640 p->proto = c->data.proto;
2642 nlmsg_end(skb, nlh);
2644 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2647 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2651 l += nla_total_size(aead_len(x->aead));
2653 l += nla_total_size(sizeof(struct xfrm_algo) +
2654 (x->aalg->alg_key_len + 7) / 8);
2655 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2658 l += nla_total_size(xfrm_alg_len(x->ealg));
2660 l += nla_total_size(sizeof(*x->calg));
2662 l += nla_total_size(sizeof(*x->encap));
2664 l += nla_total_size(sizeof(x->tfcpad));
2666 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2668 l += nla_total_size(sizeof(struct xfrm_replay_state));
2670 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2671 x->security->ctx_len);
2673 l += nla_total_size(sizeof(*x->coaddr));
2674 if (x->props.extra_flags)
2675 l += nla_total_size(sizeof(x->props.extra_flags));
2676 if (x->props.output_mark)
2677 l += nla_total_size(sizeof(x->props.output_mark));
2679 /* Must count x->lastused as it may become non-zero behind our back. */
2680 l += nla_total_size(sizeof(u64));
2685 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2687 struct net *net = xs_net(x);
2688 struct xfrm_usersa_info *p;
2689 struct xfrm_usersa_id *id;
2690 struct nlmsghdr *nlh;
2691 struct sk_buff *skb;
2692 int len = xfrm_sa_len(x);
2695 headlen = sizeof(*p);
2696 if (c->event == XFRM_MSG_DELSA) {
2697 len += nla_total_size(headlen);
2698 headlen = sizeof(*id);
2699 len += nla_total_size(sizeof(struct xfrm_mark));
2701 len += NLMSG_ALIGN(headlen);
2703 skb = nlmsg_new(len, GFP_ATOMIC);
2707 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2712 p = nlmsg_data(nlh);
2713 if (c->event == XFRM_MSG_DELSA) {
2714 struct nlattr *attr;
2716 id = nlmsg_data(nlh);
2717 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2718 id->spi = x->id.spi;
2719 id->family = x->props.family;
2720 id->proto = x->id.proto;
2722 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2729 err = copy_to_user_state_extra(x, p, skb);
2733 nlmsg_end(skb, nlh);
2735 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2742 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2746 case XFRM_MSG_EXPIRE:
2747 return xfrm_exp_state_notify(x, c);
2748 case XFRM_MSG_NEWAE:
2749 return xfrm_aevent_state_notify(x, c);
2750 case XFRM_MSG_DELSA:
2751 case XFRM_MSG_UPDSA:
2752 case XFRM_MSG_NEWSA:
2753 return xfrm_notify_sa(x, c);
2754 case XFRM_MSG_FLUSHSA:
2755 return xfrm_notify_sa_flush(c);
2757 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2766 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2767 struct xfrm_policy *xp)
2769 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2770 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2771 + nla_total_size(sizeof(struct xfrm_mark))
2772 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2773 + userpolicy_type_attrsize();
2776 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2777 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2779 __u32 seq = xfrm_get_acqseq();
2780 struct xfrm_user_acquire *ua;
2781 struct nlmsghdr *nlh;
2784 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2788 ua = nlmsg_data(nlh);
2789 memcpy(&ua->id, &x->id, sizeof(ua->id));
2790 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2791 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2792 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2793 ua->aalgos = xt->aalgos;
2794 ua->ealgos = xt->ealgos;
2795 ua->calgos = xt->calgos;
2796 ua->seq = x->km.seq = seq;
2798 err = copy_to_user_tmpl(xp, skb);
2800 err = copy_to_user_state_sec_ctx(x, skb);
2802 err = copy_to_user_policy_type(xp->type, skb);
2804 err = xfrm_mark_put(skb, &xp->mark);
2806 nlmsg_cancel(skb, nlh);
2810 nlmsg_end(skb, nlh);
2814 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2815 struct xfrm_policy *xp)
2817 struct net *net = xs_net(x);
2818 struct sk_buff *skb;
2820 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2824 if (build_acquire(skb, x, xt, xp) < 0)
2827 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2830 /* User gives us xfrm_user_policy_info followed by an array of 0
2831 * or more templates.
2833 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2834 u8 *data, int len, int *dir)
2836 struct net *net = sock_net(sk);
2837 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2838 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2839 struct xfrm_policy *xp;
2842 switch (sk->sk_family) {
2844 if (opt != IP_XFRM_POLICY) {
2849 #if IS_ENABLED(CONFIG_IPV6)
2851 if (opt != IPV6_XFRM_POLICY) {
2864 if (len < sizeof(*p) ||
2865 verify_newpolicy_info(p))
2868 nr = ((len - sizeof(*p)) / sizeof(*ut));
2869 if (validate_tmpl(nr, ut, p->sel.family))
2872 if (p->dir > XFRM_POLICY_OUT)
2875 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2881 copy_from_user_policy(xp, p);
2882 xp->type = XFRM_POLICY_TYPE_MAIN;
2883 copy_templates(xp, ut, nr);
2890 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2892 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2893 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2894 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2895 + nla_total_size(sizeof(struct xfrm_mark))
2896 + userpolicy_type_attrsize();
2899 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2900 int dir, const struct km_event *c)
2902 struct xfrm_user_polexpire *upe;
2903 int hard = c->data.hard;
2904 struct nlmsghdr *nlh;
2907 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2911 upe = nlmsg_data(nlh);
2912 copy_to_user_policy(xp, &upe->pol, dir);
2913 err = copy_to_user_tmpl(xp, skb);
2915 err = copy_to_user_sec_ctx(xp, skb);
2917 err = copy_to_user_policy_type(xp->type, skb);
2919 err = xfrm_mark_put(skb, &xp->mark);
2921 nlmsg_cancel(skb, nlh);
2926 nlmsg_end(skb, nlh);
2930 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2932 struct net *net = xp_net(xp);
2933 struct sk_buff *skb;
2935 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2939 if (build_polexpire(skb, xp, dir, c) < 0)
2942 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2945 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2947 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2948 struct net *net = xp_net(xp);
2949 struct xfrm_userpolicy_info *p;
2950 struct xfrm_userpolicy_id *id;
2951 struct nlmsghdr *nlh;
2952 struct sk_buff *skb;
2955 headlen = sizeof(*p);
2956 if (c->event == XFRM_MSG_DELPOLICY) {
2957 len += nla_total_size(headlen);
2958 headlen = sizeof(*id);
2960 len += userpolicy_type_attrsize();
2961 len += nla_total_size(sizeof(struct xfrm_mark));
2962 len += NLMSG_ALIGN(headlen);
2964 skb = nlmsg_new(len, GFP_ATOMIC);
2968 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2973 p = nlmsg_data(nlh);
2974 if (c->event == XFRM_MSG_DELPOLICY) {
2975 struct nlattr *attr;
2977 id = nlmsg_data(nlh);
2978 memset(id, 0, sizeof(*id));
2981 id->index = xp->index;
2983 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2985 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2993 copy_to_user_policy(xp, p, dir);
2994 err = copy_to_user_tmpl(xp, skb);
2996 err = copy_to_user_policy_type(xp->type, skb);
2998 err = xfrm_mark_put(skb, &xp->mark);
3002 nlmsg_end(skb, nlh);
3004 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3011 static int xfrm_notify_policy_flush(const struct km_event *c)
3013 struct net *net = c->net;
3014 struct nlmsghdr *nlh;
3015 struct sk_buff *skb;
3018 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3022 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3026 err = copy_to_user_policy_type(c->data.type, skb);
3030 nlmsg_end(skb, nlh);
3032 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3039 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3043 err = verify_policy_dir(dir);
3048 case XFRM_MSG_NEWPOLICY:
3049 case XFRM_MSG_UPDPOLICY:
3050 case XFRM_MSG_DELPOLICY:
3051 return xfrm_notify_policy(xp, dir, c);
3052 case XFRM_MSG_FLUSHPOLICY:
3053 return xfrm_notify_policy_flush(c);
3054 case XFRM_MSG_POLEXPIRE:
3055 return xfrm_exp_policy_notify(xp, dir, c);
3057 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3065 static inline size_t xfrm_report_msgsize(void)
3067 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3070 static int build_report(struct sk_buff *skb, u8 proto,
3071 struct xfrm_selector *sel, xfrm_address_t *addr)
3073 struct xfrm_user_report *ur;
3074 struct nlmsghdr *nlh;
3076 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3080 ur = nlmsg_data(nlh);
3082 memcpy(&ur->sel, sel, sizeof(ur->sel));
3085 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3087 nlmsg_cancel(skb, nlh);
3091 nlmsg_end(skb, nlh);
3095 static int xfrm_send_report(struct net *net, u8 proto,
3096 struct xfrm_selector *sel, xfrm_address_t *addr)
3098 struct sk_buff *skb;
3100 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3104 if (build_report(skb, proto, sel, addr) < 0)
3107 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3110 static inline size_t xfrm_mapping_msgsize(void)
3112 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3115 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3116 xfrm_address_t *new_saddr, __be16 new_sport)
3118 struct xfrm_user_mapping *um;
3119 struct nlmsghdr *nlh;
3121 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3125 um = nlmsg_data(nlh);
3127 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3128 um->id.spi = x->id.spi;
3129 um->id.family = x->props.family;
3130 um->id.proto = x->id.proto;
3131 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3132 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3133 um->new_sport = new_sport;
3134 um->old_sport = x->encap->encap_sport;
3135 um->reqid = x->props.reqid;
3137 nlmsg_end(skb, nlh);
3141 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3144 struct net *net = xs_net(x);
3145 struct sk_buff *skb;
3147 if (x->id.proto != IPPROTO_ESP)
3153 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3157 if (build_mapping(skb, x, ipaddr, sport) < 0)
3160 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3163 static bool xfrm_is_alive(const struct km_event *c)
3165 return (bool)xfrm_acquire_is_on(c->net);
3168 static struct xfrm_mgr netlink_mgr = {
3170 .notify = xfrm_send_state_notify,
3171 .acquire = xfrm_send_acquire,
3172 .compile_policy = xfrm_compile_policy,
3173 .notify_policy = xfrm_send_policy_notify,
3174 .report = xfrm_send_report,
3175 .migrate = xfrm_send_migrate,
3176 .new_mapping = xfrm_send_mapping,
3177 .is_alive = xfrm_is_alive,
3180 static int __net_init xfrm_user_net_init(struct net *net)
3183 struct netlink_kernel_cfg cfg = {
3184 .groups = XFRMNLGRP_MAX,
3185 .input = xfrm_netlink_rcv,
3188 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3191 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3192 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3196 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3199 list_for_each_entry(net, net_exit_list, exit_list)
3200 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3202 list_for_each_entry(net, net_exit_list, exit_list)
3203 netlink_kernel_release(net->xfrm.nlsk_stash);
3206 static struct pernet_operations xfrm_user_net_ops = {
3207 .init = xfrm_user_net_init,
3208 .exit_batch = xfrm_user_net_exit,
3211 static int __init xfrm_user_init(void)
3215 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3217 rv = register_pernet_subsys(&xfrm_user_net_ops);
3220 rv = xfrm_register_km(&netlink_mgr);
3222 unregister_pernet_subsys(&xfrm_user_net_ops);
3226 static void __exit xfrm_user_exit(void)
3228 xfrm_unregister_km(&netlink_mgr);
3229 unregister_pernet_subsys(&xfrm_user_net_ops);
3232 module_init(xfrm_user_init);
3233 module_exit(xfrm_user_exit);
3234 MODULE_LICENSE("GPL");
3235 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);