1 // SPDX-License-Identifier: GPL-2.0-only
2 /* xfrm_user.c: User interface to configure xfrm engine.
4 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
8 * Kazunori MIYAZAWA @USAGI
9 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
14 #include <linux/crypto.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/socket.h>
20 #include <linux/string.h>
21 #include <linux/net.h>
22 #include <linux/skbuff.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
31 #include <linux/uaccess.h>
32 #if IS_ENABLED(CONFIG_IPV6)
33 #include <linux/in6.h>
35 #include <asm/unaligned.h>
37 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
39 struct nlattr *rt = attrs[type];
40 struct xfrm_algo *algp;
46 if (nla_len(rt) < (int)xfrm_alg_len(algp))
59 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
63 static int verify_auth_trunc(struct nlattr **attrs)
65 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
66 struct xfrm_algo_auth *algp;
72 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
75 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
79 static int verify_aead(struct nlattr **attrs)
81 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
82 struct xfrm_algo_aead *algp;
88 if (nla_len(rt) < (int)aead_len(algp))
91 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
95 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
96 xfrm_address_t **addrp)
98 struct nlattr *rt = attrs[type];
101 *addrp = nla_data(rt);
104 static inline int verify_sec_ctx_len(struct nlattr **attrs)
106 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
107 struct xfrm_user_sec_ctx *uctx;
113 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
119 static inline int verify_replay(struct xfrm_usersa_info *p,
120 struct nlattr **attrs)
122 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
123 struct xfrm_replay_state_esn *rs;
126 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
133 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
134 nla_len(rt) != sizeof(*rs))
137 /* As only ESP and AH support ESN feature. */
138 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
141 if (p->replay_window != 0)
147 static int verify_newsa_info(struct xfrm_usersa_info *p,
148 struct nlattr **attrs)
158 #if IS_ENABLED(CONFIG_IPV6)
169 switch (p->sel.family) {
174 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
180 #if IS_ENABLED(CONFIG_IPV6)
181 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
195 switch (p->id.proto) {
197 if ((!attrs[XFRMA_ALG_AUTH] &&
198 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
199 attrs[XFRMA_ALG_AEAD] ||
200 attrs[XFRMA_ALG_CRYPT] ||
201 attrs[XFRMA_ALG_COMP] ||
207 if (attrs[XFRMA_ALG_COMP])
209 if (!attrs[XFRMA_ALG_AUTH] &&
210 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
211 !attrs[XFRMA_ALG_CRYPT] &&
212 !attrs[XFRMA_ALG_AEAD])
214 if ((attrs[XFRMA_ALG_AUTH] ||
215 attrs[XFRMA_ALG_AUTH_TRUNC] ||
216 attrs[XFRMA_ALG_CRYPT]) &&
217 attrs[XFRMA_ALG_AEAD])
219 if (attrs[XFRMA_TFCPAD] &&
220 p->mode != XFRM_MODE_TUNNEL)
225 if (!attrs[XFRMA_ALG_COMP] ||
226 attrs[XFRMA_ALG_AEAD] ||
227 attrs[XFRMA_ALG_AUTH] ||
228 attrs[XFRMA_ALG_AUTH_TRUNC] ||
229 attrs[XFRMA_ALG_CRYPT] ||
230 attrs[XFRMA_TFCPAD] ||
231 (ntohl(p->id.spi) >= 0x10000))
235 #if IS_ENABLED(CONFIG_IPV6)
236 case IPPROTO_DSTOPTS:
237 case IPPROTO_ROUTING:
238 if (attrs[XFRMA_ALG_COMP] ||
239 attrs[XFRMA_ALG_AUTH] ||
240 attrs[XFRMA_ALG_AUTH_TRUNC] ||
241 attrs[XFRMA_ALG_AEAD] ||
242 attrs[XFRMA_ALG_CRYPT] ||
243 attrs[XFRMA_ENCAP] ||
244 attrs[XFRMA_SEC_CTX] ||
245 attrs[XFRMA_TFCPAD] ||
246 !attrs[XFRMA_COADDR])
255 if ((err = verify_aead(attrs)))
257 if ((err = verify_auth_trunc(attrs)))
259 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
261 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
263 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
265 if ((err = verify_sec_ctx_len(attrs)))
267 if ((err = verify_replay(p, attrs)))
272 case XFRM_MODE_TRANSPORT:
273 case XFRM_MODE_TUNNEL:
274 case XFRM_MODE_ROUTEOPTIMIZATION:
288 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
289 struct xfrm_algo_desc *(*get_byname)(const char *, int),
292 struct xfrm_algo *p, *ualg;
293 struct xfrm_algo_desc *algo;
298 ualg = nla_data(rta);
300 algo = get_byname(ualg->alg_name, 1);
303 *props = algo->desc.sadb_alg_id;
305 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
309 strcpy(p->alg_name, algo->name);
314 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
316 struct xfrm_algo *p, *ualg;
317 struct xfrm_algo_desc *algo;
322 ualg = nla_data(rta);
324 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
327 x->props.ealgo = algo->desc.sadb_alg_id;
329 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
333 strcpy(p->alg_name, algo->name);
335 x->geniv = algo->uinfo.encr.geniv;
339 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
342 struct xfrm_algo *ualg;
343 struct xfrm_algo_auth *p;
344 struct xfrm_algo_desc *algo;
349 ualg = nla_data(rta);
351 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
354 *props = algo->desc.sadb_alg_id;
356 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
360 strcpy(p->alg_name, algo->name);
361 p->alg_key_len = ualg->alg_key_len;
362 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
363 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
369 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
372 struct xfrm_algo_auth *p, *ualg;
373 struct xfrm_algo_desc *algo;
378 ualg = nla_data(rta);
380 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
383 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
385 *props = algo->desc.sadb_alg_id;
387 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
391 strcpy(p->alg_name, algo->name);
392 if (!p->alg_trunc_len)
393 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
399 static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
401 struct xfrm_algo_aead *p, *ualg;
402 struct xfrm_algo_desc *algo;
407 ualg = nla_data(rta);
409 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
412 x->props.ealgo = algo->desc.sadb_alg_id;
414 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
418 strcpy(p->alg_name, algo->name);
420 x->geniv = algo->uinfo.aead.geniv;
424 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
427 struct xfrm_replay_state_esn *up;
430 if (!replay_esn || !rp)
434 ulen = xfrm_replay_state_esn_len(up);
436 /* Check the overall length and the internal bitmap length to avoid
437 * potential overflow. */
438 if (nla_len(rp) < (int)ulen ||
439 xfrm_replay_state_esn_len(replay_esn) != ulen ||
440 replay_esn->bmp_len != up->bmp_len)
443 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
449 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
450 struct xfrm_replay_state_esn **preplay_esn,
453 struct xfrm_replay_state_esn *p, *pp, *up;
454 unsigned int klen, ulen;
460 klen = xfrm_replay_state_esn_len(up);
461 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
463 p = kzalloc(klen, GFP_KERNEL);
467 pp = kzalloc(klen, GFP_KERNEL);
474 memcpy(pp, up, ulen);
482 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
484 unsigned int len = 0;
487 len += sizeof(struct xfrm_user_sec_ctx);
488 len += xfrm_ctx->ctx_len;
493 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
495 memcpy(&x->id, &p->id, sizeof(x->id));
496 memcpy(&x->sel, &p->sel, sizeof(x->sel));
497 memcpy(&x->lft, &p->lft, sizeof(x->lft));
498 x->props.mode = p->mode;
499 x->props.replay_window = min_t(unsigned int, p->replay_window,
500 sizeof(x->replay.bitmap) * 8);
501 x->props.reqid = p->reqid;
502 x->props.family = p->family;
503 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
504 x->props.flags = p->flags;
506 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
507 x->sel.family = p->family;
511 * someday when pfkey also has support, we could have the code
512 * somehow made shareable and move it to xfrm_state.c - JHS
515 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
518 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
519 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
520 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
521 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
522 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
525 struct xfrm_replay_state_esn *replay_esn;
526 replay_esn = nla_data(re);
527 memcpy(x->replay_esn, replay_esn,
528 xfrm_replay_state_esn_len(replay_esn));
529 memcpy(x->preplay_esn, replay_esn,
530 xfrm_replay_state_esn_len(replay_esn));
534 struct xfrm_replay_state *replay;
535 replay = nla_data(rp);
536 memcpy(&x->replay, replay, sizeof(*replay));
537 memcpy(&x->preplay, replay, sizeof(*replay));
541 struct xfrm_lifetime_cur *ltime;
542 ltime = nla_data(lt);
543 x->curlft.bytes = ltime->bytes;
544 x->curlft.packets = ltime->packets;
545 x->curlft.add_time = ltime->add_time;
546 x->curlft.use_time = ltime->use_time;
550 x->replay_maxage = nla_get_u32(et);
553 x->replay_maxdiff = nla_get_u32(rt);
556 static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
558 if (attrs[XFRMA_SET_MARK]) {
559 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
560 if (attrs[XFRMA_SET_MARK_MASK])
561 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
569 static struct xfrm_state *xfrm_state_construct(struct net *net,
570 struct xfrm_usersa_info *p,
571 struct nlattr **attrs,
574 struct xfrm_state *x = xfrm_state_alloc(net);
580 copy_from_user_state(x, p);
582 if (attrs[XFRMA_SA_EXTRA_FLAGS])
583 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
585 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
587 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
588 attrs[XFRMA_ALG_AUTH_TRUNC])))
590 if (!x->props.aalgo) {
591 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
592 attrs[XFRMA_ALG_AUTH])))
595 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
597 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
598 xfrm_calg_get_byname,
599 attrs[XFRMA_ALG_COMP])))
602 if (attrs[XFRMA_ENCAP]) {
603 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
604 sizeof(*x->encap), GFP_KERNEL);
605 if (x->encap == NULL)
609 if (attrs[XFRMA_TFCPAD])
610 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
612 if (attrs[XFRMA_COADDR]) {
613 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
614 sizeof(*x->coaddr), GFP_KERNEL);
615 if (x->coaddr == NULL)
619 xfrm_mark_get(attrs, &x->mark);
621 xfrm_smark_init(attrs, &x->props.smark);
623 if (attrs[XFRMA_IF_ID])
624 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
626 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
630 if (attrs[XFRMA_SEC_CTX]) {
631 err = security_xfrm_state_alloc(x,
632 nla_data(attrs[XFRMA_SEC_CTX]));
637 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
638 attrs[XFRMA_REPLAY_ESN_VAL])))
642 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
643 /* sysctl_xfrm_aevent_etime is in 100ms units */
644 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
646 if ((err = xfrm_init_replay(x)))
649 /* override default values from above */
650 xfrm_update_ae_params(x, attrs, 0);
652 /* configure the hardware if offload is requested */
653 if (attrs[XFRMA_OFFLOAD_DEV]) {
654 err = xfrm_dev_state_add(net, x,
655 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
663 x->km.state = XFRM_STATE_DEAD;
670 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
671 struct nlattr **attrs)
673 struct net *net = sock_net(skb->sk);
674 struct xfrm_usersa_info *p = nlmsg_data(nlh);
675 struct xfrm_state *x;
679 err = verify_newsa_info(p, attrs);
683 x = xfrm_state_construct(net, p, attrs, &err);
688 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
689 err = xfrm_state_add(x);
691 err = xfrm_state_update(x);
693 xfrm_audit_state_add(x, err ? 0 : 1, true);
696 x->km.state = XFRM_STATE_DEAD;
697 xfrm_dev_state_delete(x);
702 if (x->km.state == XFRM_STATE_VOID)
703 x->km.state = XFRM_STATE_VALID;
705 c.seq = nlh->nlmsg_seq;
706 c.portid = nlh->nlmsg_pid;
707 c.event = nlh->nlmsg_type;
709 km_state_notify(x, &c);
715 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
716 struct xfrm_usersa_id *p,
717 struct nlattr **attrs,
720 struct xfrm_state *x = NULL;
723 u32 mark = xfrm_mark_get(attrs, &m);
725 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
727 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
729 xfrm_address_t *saddr = NULL;
731 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
738 x = xfrm_state_lookup_byaddr(net, mark,
740 p->proto, p->family);
749 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
750 struct nlattr **attrs)
752 struct net *net = sock_net(skb->sk);
753 struct xfrm_state *x;
756 struct xfrm_usersa_id *p = nlmsg_data(nlh);
758 x = xfrm_user_state_lookup(net, p, attrs, &err);
762 if ((err = security_xfrm_state_delete(x)) != 0)
765 if (xfrm_state_kern(x)) {
770 err = xfrm_state_delete(x);
775 c.seq = nlh->nlmsg_seq;
776 c.portid = nlh->nlmsg_pid;
777 c.event = nlh->nlmsg_type;
778 km_state_notify(x, &c);
781 xfrm_audit_state_delete(x, err ? 0 : 1, true);
786 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
788 memset(p, 0, sizeof(*p));
789 memcpy(&p->id, &x->id, sizeof(p->id));
790 memcpy(&p->sel, &x->sel, sizeof(p->sel));
791 memcpy(&p->lft, &x->lft, sizeof(p->lft));
792 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
793 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
794 put_unaligned(x->stats.replay, &p->stats.replay);
795 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
796 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
797 p->mode = x->props.mode;
798 p->replay_window = x->props.replay_window;
799 p->reqid = x->props.reqid;
800 p->family = x->props.family;
801 p->flags = x->props.flags;
805 struct xfrm_dump_info {
806 struct sk_buff *in_skb;
807 struct sk_buff *out_skb;
812 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
814 struct xfrm_user_sec_ctx *uctx;
816 int ctx_size = sizeof(*uctx) + s->ctx_len;
818 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
822 uctx = nla_data(attr);
823 uctx->exttype = XFRMA_SEC_CTX;
824 uctx->len = ctx_size;
825 uctx->ctx_doi = s->ctx_doi;
826 uctx->ctx_alg = s->ctx_alg;
827 uctx->ctx_len = s->ctx_len;
828 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
833 static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
835 struct xfrm_user_offload *xuo;
838 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
842 xuo = nla_data(attr);
843 memset(xuo, 0, sizeof(*xuo));
844 xuo->ifindex = xso->dev->ifindex;
845 xuo->flags = xso->flags;
850 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
852 struct xfrm_algo *algo;
855 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
856 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
860 algo = nla_data(nla);
861 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
862 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
863 algo->alg_key_len = auth->alg_key_len;
868 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
873 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
875 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
880 /* Don't change this without updating xfrm_sa_len! */
881 static int copy_to_user_state_extra(struct xfrm_state *x,
882 struct xfrm_usersa_info *p,
887 copy_to_user_state(x, p);
889 if (x->props.extra_flags) {
890 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
891 x->props.extra_flags);
897 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
902 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
908 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
913 ret = copy_to_user_auth(x->aalg, skb);
915 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
916 xfrm_alg_auth_len(x->aalg), x->aalg);
921 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
926 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
931 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
936 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
940 ret = xfrm_mark_put(skb, &x->mark);
944 ret = xfrm_smark_put(skb, &x->props.smark);
949 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
950 xfrm_replay_state_esn_len(x->replay_esn),
953 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
958 ret = copy_user_offload(&x->xso, skb);
962 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
967 ret = copy_sec_ctx(x->security, skb);
972 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
974 struct xfrm_dump_info *sp = ptr;
975 struct sk_buff *in_skb = sp->in_skb;
976 struct sk_buff *skb = sp->out_skb;
977 struct xfrm_usersa_info *p;
978 struct nlmsghdr *nlh;
981 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
982 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
988 err = copy_to_user_state_extra(x, p, skb);
990 nlmsg_cancel(skb, nlh);
997 static int xfrm_dump_sa_done(struct netlink_callback *cb)
999 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1000 struct sock *sk = cb->skb->sk;
1001 struct net *net = sock_net(sk);
1004 xfrm_state_walk_done(walk, net);
1008 static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1009 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1011 struct net *net = sock_net(skb->sk);
1012 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1013 struct xfrm_dump_info info;
1015 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1016 sizeof(cb->args) - sizeof(cb->args[0]));
1018 info.in_skb = cb->skb;
1020 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1021 info.nlmsg_flags = NLM_F_MULTI;
1024 struct nlattr *attrs[XFRMA_MAX+1];
1025 struct xfrm_address_filter *filter = NULL;
1029 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1030 xfrma_policy, cb->extack);
1034 if (attrs[XFRMA_ADDRESS_FILTER]) {
1035 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1036 sizeof(*filter), GFP_KERNEL);
1041 if (attrs[XFRMA_PROTO])
1042 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1044 xfrm_state_walk_init(walk, proto, filter);
1048 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1053 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1054 struct xfrm_state *x, u32 seq)
1056 struct xfrm_dump_info info;
1057 struct sk_buff *skb;
1060 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1062 return ERR_PTR(-ENOMEM);
1064 info.in_skb = in_skb;
1066 info.nlmsg_seq = seq;
1067 info.nlmsg_flags = 0;
1069 err = dump_one_state(x, 0, &info);
1072 return ERR_PTR(err);
1078 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1079 * Must be called with RCU read lock.
1081 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1082 u32 pid, unsigned int group)
1084 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1091 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1094 static inline unsigned int xfrm_spdinfo_msgsize(void)
1096 return NLMSG_ALIGN(4)
1097 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1098 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1099 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1100 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1103 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1104 u32 portid, u32 seq, u32 flags)
1106 struct xfrmk_spdinfo si;
1107 struct xfrmu_spdinfo spc;
1108 struct xfrmu_spdhinfo sph;
1109 struct xfrmu_spdhthresh spt4, spt6;
1110 struct nlmsghdr *nlh;
1115 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1116 if (nlh == NULL) /* shouldn't really happen ... */
1119 f = nlmsg_data(nlh);
1121 xfrm_spd_getinfo(net, &si);
1122 spc.incnt = si.incnt;
1123 spc.outcnt = si.outcnt;
1124 spc.fwdcnt = si.fwdcnt;
1125 spc.inscnt = si.inscnt;
1126 spc.outscnt = si.outscnt;
1127 spc.fwdscnt = si.fwdscnt;
1128 sph.spdhcnt = si.spdhcnt;
1129 sph.spdhmcnt = si.spdhmcnt;
1132 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1134 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1135 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1136 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1137 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1138 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1140 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1142 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1144 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1146 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1148 nlmsg_cancel(skb, nlh);
1152 nlmsg_end(skb, nlh);
1156 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1157 struct nlattr **attrs)
1159 struct net *net = sock_net(skb->sk);
1160 struct xfrmu_spdhthresh *thresh4 = NULL;
1161 struct xfrmu_spdhthresh *thresh6 = NULL;
1163 /* selector prefixlen thresholds to hash policies */
1164 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1165 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1167 if (nla_len(rta) < sizeof(*thresh4))
1169 thresh4 = nla_data(rta);
1170 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1173 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1174 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1176 if (nla_len(rta) < sizeof(*thresh6))
1178 thresh6 = nla_data(rta);
1179 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1183 if (thresh4 || thresh6) {
1184 write_seqlock(&net->xfrm.policy_hthresh.lock);
1186 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1187 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1190 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1191 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1193 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1195 xfrm_policy_hash_rebuild(net);
1201 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1202 struct nlattr **attrs)
1204 struct net *net = sock_net(skb->sk);
1205 struct sk_buff *r_skb;
1206 u32 *flags = nlmsg_data(nlh);
1207 u32 sportid = NETLINK_CB(skb).portid;
1208 u32 seq = nlh->nlmsg_seq;
1211 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1215 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1218 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1221 static inline unsigned int xfrm_sadinfo_msgsize(void)
1223 return NLMSG_ALIGN(4)
1224 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1225 + nla_total_size(4); /* XFRMA_SAD_CNT */
1228 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1229 u32 portid, u32 seq, u32 flags)
1231 struct xfrmk_sadinfo si;
1232 struct xfrmu_sadhinfo sh;
1233 struct nlmsghdr *nlh;
1237 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1238 if (nlh == NULL) /* shouldn't really happen ... */
1241 f = nlmsg_data(nlh);
1243 xfrm_sad_getinfo(net, &si);
1245 sh.sadhmcnt = si.sadhmcnt;
1246 sh.sadhcnt = si.sadhcnt;
1248 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1250 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1252 nlmsg_cancel(skb, nlh);
1256 nlmsg_end(skb, nlh);
1260 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1261 struct nlattr **attrs)
1263 struct net *net = sock_net(skb->sk);
1264 struct sk_buff *r_skb;
1265 u32 *flags = nlmsg_data(nlh);
1266 u32 sportid = NETLINK_CB(skb).portid;
1267 u32 seq = nlh->nlmsg_seq;
1270 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1274 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1277 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1280 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1281 struct nlattr **attrs)
1283 struct net *net = sock_net(skb->sk);
1284 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1285 struct xfrm_state *x;
1286 struct sk_buff *resp_skb;
1289 x = xfrm_user_state_lookup(net, p, attrs, &err);
1293 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1294 if (IS_ERR(resp_skb)) {
1295 err = PTR_ERR(resp_skb);
1297 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1304 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1305 struct nlattr **attrs)
1307 struct net *net = sock_net(skb->sk);
1308 struct xfrm_state *x;
1309 struct xfrm_userspi_info *p;
1310 struct sk_buff *resp_skb;
1311 xfrm_address_t *daddr;
1318 p = nlmsg_data(nlh);
1319 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1323 family = p->info.family;
1324 daddr = &p->info.id.daddr;
1328 mark = xfrm_mark_get(attrs, &m);
1330 if (attrs[XFRMA_IF_ID])
1331 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1334 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1335 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1342 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1343 if_id, p->info.id.proto, daddr,
1350 err = xfrm_alloc_spi(x, p->min, p->max);
1354 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1355 if (IS_ERR(resp_skb)) {
1356 err = PTR_ERR(resp_skb);
1360 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1368 static int verify_policy_dir(u8 dir)
1371 case XFRM_POLICY_IN:
1372 case XFRM_POLICY_OUT:
1373 case XFRM_POLICY_FWD:
1383 static int verify_policy_type(u8 type)
1386 case XFRM_POLICY_TYPE_MAIN:
1387 #ifdef CONFIG_XFRM_SUB_POLICY
1388 case XFRM_POLICY_TYPE_SUB:
1399 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1404 case XFRM_SHARE_ANY:
1405 case XFRM_SHARE_SESSION:
1406 case XFRM_SHARE_USER:
1407 case XFRM_SHARE_UNIQUE:
1414 switch (p->action) {
1415 case XFRM_POLICY_ALLOW:
1416 case XFRM_POLICY_BLOCK:
1423 switch (p->sel.family) {
1425 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
1431 #if IS_ENABLED(CONFIG_IPV6)
1432 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
1437 return -EAFNOSUPPORT;
1444 ret = verify_policy_dir(p->dir);
1447 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
1453 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1455 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1456 struct xfrm_user_sec_ctx *uctx;
1461 uctx = nla_data(rt);
1462 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1465 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1471 for (i = 0; i < nr; i++, ut++) {
1472 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1474 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1475 memcpy(&t->saddr, &ut->saddr,
1476 sizeof(xfrm_address_t));
1477 t->reqid = ut->reqid;
1479 t->share = ut->share;
1480 t->optional = ut->optional;
1481 t->aalgos = ut->aalgos;
1482 t->ealgos = ut->ealgos;
1483 t->calgos = ut->calgos;
1484 /* If all masks are ~0, then we allow all algorithms. */
1485 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1486 t->encap_family = ut->family;
1490 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1495 if (nr > XFRM_MAX_DEPTH)
1498 prev_family = family;
1500 for (i = 0; i < nr; i++) {
1501 /* We never validated the ut->family value, so many
1502 * applications simply leave it at zero. The check was
1503 * never made and ut->family was ignored because all
1504 * templates could be assumed to have the same family as
1505 * the policy itself. Now that we will have ipv4-in-ipv6
1506 * and ipv6-in-ipv4 tunnels, this is no longer true.
1509 ut[i].family = family;
1511 switch (ut[i].mode) {
1512 case XFRM_MODE_TUNNEL:
1513 case XFRM_MODE_BEET:
1516 if (ut[i].family != prev_family)
1520 if (ut[i].mode >= XFRM_MODE_MAX)
1523 prev_family = ut[i].family;
1525 switch (ut[i].family) {
1528 #if IS_ENABLED(CONFIG_IPV6)
1536 if (!xfrm_id_proto_valid(ut[i].id.proto))
1543 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1545 struct nlattr *rt = attrs[XFRMA_TMPL];
1550 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1551 int nr = nla_len(rt) / sizeof(*utmpl);
1554 err = validate_tmpl(nr, utmpl, pol->family);
1558 copy_templates(pol, utmpl, nr);
1563 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1565 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1566 struct xfrm_userpolicy_type *upt;
1567 u8 type = XFRM_POLICY_TYPE_MAIN;
1575 err = verify_policy_type(type);
1583 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1585 xp->priority = p->priority;
1586 xp->index = p->index;
1587 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1588 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1589 xp->action = p->action;
1590 xp->flags = p->flags;
1591 xp->family = p->sel.family;
1592 /* XXX xp->share = p->share; */
1595 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1597 memset(p, 0, sizeof(*p));
1598 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1599 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1600 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1601 p->priority = xp->priority;
1602 p->index = xp->index;
1603 p->sel.family = xp->family;
1605 p->action = xp->action;
1606 p->flags = xp->flags;
1607 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1610 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1612 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1620 copy_from_user_policy(xp, p);
1622 err = copy_from_user_policy_type(&xp->type, attrs);
1626 if (!(err = copy_from_user_tmpl(xp, attrs)))
1627 err = copy_from_user_sec_ctx(xp, attrs);
1631 xfrm_mark_get(attrs, &xp->mark);
1633 if (attrs[XFRMA_IF_ID])
1634 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1640 xfrm_policy_destroy(xp);
1644 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1645 struct nlattr **attrs)
1647 struct net *net = sock_net(skb->sk);
1648 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1649 struct xfrm_policy *xp;
1654 err = verify_newpolicy_info(p);
1657 err = verify_sec_ctx_len(attrs);
1661 xp = xfrm_policy_construct(net, p, attrs, &err);
1665 /* shouldn't excl be based on nlh flags??
1666 * Aha! this is anti-netlink really i.e more pfkey derived
1667 * in netlink excl is a flag and you wouldnt need
1668 * a type XFRM_MSG_UPDPOLICY - JHS */
1669 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1670 err = xfrm_policy_insert(p->dir, xp, excl);
1671 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1674 security_xfrm_policy_free(xp->security);
1679 c.event = nlh->nlmsg_type;
1680 c.seq = nlh->nlmsg_seq;
1681 c.portid = nlh->nlmsg_pid;
1682 km_policy_notify(xp, p->dir, &c);
1689 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1691 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1694 if (xp->xfrm_nr == 0)
1697 for (i = 0; i < xp->xfrm_nr; i++) {
1698 struct xfrm_user_tmpl *up = &vec[i];
1699 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1701 memset(up, 0, sizeof(*up));
1702 memcpy(&up->id, &kp->id, sizeof(up->id));
1703 up->family = kp->encap_family;
1704 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1705 up->reqid = kp->reqid;
1706 up->mode = kp->mode;
1707 up->share = kp->share;
1708 up->optional = kp->optional;
1709 up->aalgos = kp->aalgos;
1710 up->ealgos = kp->ealgos;
1711 up->calgos = kp->calgos;
1714 return nla_put(skb, XFRMA_TMPL,
1715 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1718 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1721 return copy_sec_ctx(x->security, skb);
1726 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1729 return copy_sec_ctx(xp->security, skb);
1732 static inline unsigned int userpolicy_type_attrsize(void)
1734 #ifdef CONFIG_XFRM_SUB_POLICY
1735 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1741 #ifdef CONFIG_XFRM_SUB_POLICY
1742 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1744 struct xfrm_userpolicy_type upt;
1746 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1747 memset(&upt, 0, sizeof(upt));
1750 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1754 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1760 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1762 struct xfrm_dump_info *sp = ptr;
1763 struct xfrm_userpolicy_info *p;
1764 struct sk_buff *in_skb = sp->in_skb;
1765 struct sk_buff *skb = sp->out_skb;
1766 struct nlmsghdr *nlh;
1769 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1770 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1774 p = nlmsg_data(nlh);
1775 copy_to_user_policy(xp, p, dir);
1776 err = copy_to_user_tmpl(xp, skb);
1778 err = copy_to_user_sec_ctx(xp, skb);
1780 err = copy_to_user_policy_type(xp->type, skb);
1782 err = xfrm_mark_put(skb, &xp->mark);
1784 err = xfrm_if_id_put(skb, xp->if_id);
1786 nlmsg_cancel(skb, nlh);
1789 nlmsg_end(skb, nlh);
1793 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1795 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1796 struct net *net = sock_net(cb->skb->sk);
1798 xfrm_policy_walk_done(walk, net);
1802 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1804 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1806 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1808 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1812 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1814 struct net *net = sock_net(skb->sk);
1815 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1816 struct xfrm_dump_info info;
1818 info.in_skb = cb->skb;
1820 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1821 info.nlmsg_flags = NLM_F_MULTI;
1823 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1828 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1829 struct xfrm_policy *xp,
1832 struct xfrm_dump_info info;
1833 struct sk_buff *skb;
1836 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1838 return ERR_PTR(-ENOMEM);
1840 info.in_skb = in_skb;
1842 info.nlmsg_seq = seq;
1843 info.nlmsg_flags = 0;
1845 err = dump_one_policy(xp, dir, 0, &info);
1848 return ERR_PTR(err);
1854 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1855 struct nlattr **attrs)
1857 struct net *net = sock_net(skb->sk);
1858 struct xfrm_policy *xp;
1859 struct xfrm_userpolicy_id *p;
1860 u8 type = XFRM_POLICY_TYPE_MAIN;
1865 u32 mark = xfrm_mark_get(attrs, &m);
1868 p = nlmsg_data(nlh);
1869 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1871 err = copy_from_user_policy_type(&type, attrs);
1875 err = verify_policy_dir(p->dir);
1879 if (attrs[XFRMA_IF_ID])
1880 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1883 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
1885 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1886 struct xfrm_sec_ctx *ctx;
1888 err = verify_sec_ctx_len(attrs);
1894 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1896 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
1900 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
1902 security_xfrm_policy_free(ctx);
1908 struct sk_buff *resp_skb;
1910 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1911 if (IS_ERR(resp_skb)) {
1912 err = PTR_ERR(resp_skb);
1914 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1915 NETLINK_CB(skb).portid);
1918 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
1923 c.data.byid = p->index;
1924 c.event = nlh->nlmsg_type;
1925 c.seq = nlh->nlmsg_seq;
1926 c.portid = nlh->nlmsg_pid;
1927 km_policy_notify(xp, p->dir, &c);
1935 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1936 struct nlattr **attrs)
1938 struct net *net = sock_net(skb->sk);
1940 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1943 err = xfrm_state_flush(net, p->proto, true, false);
1945 if (err == -ESRCH) /* empty table */
1949 c.data.proto = p->proto;
1950 c.event = nlh->nlmsg_type;
1951 c.seq = nlh->nlmsg_seq;
1952 c.portid = nlh->nlmsg_pid;
1954 km_state_notify(NULL, &c);
1959 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
1961 unsigned int replay_size = x->replay_esn ?
1962 xfrm_replay_state_esn_len(x->replay_esn) :
1963 sizeof(struct xfrm_replay_state);
1965 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1966 + nla_total_size(replay_size)
1967 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
1968 + nla_total_size(sizeof(struct xfrm_mark))
1969 + nla_total_size(4) /* XFRM_AE_RTHR */
1970 + nla_total_size(4); /* XFRM_AE_ETHR */
1973 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1975 struct xfrm_aevent_id *id;
1976 struct nlmsghdr *nlh;
1979 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1983 id = nlmsg_data(nlh);
1984 memset(&id->sa_id, 0, sizeof(id->sa_id));
1985 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
1986 id->sa_id.spi = x->id.spi;
1987 id->sa_id.family = x->props.family;
1988 id->sa_id.proto = x->id.proto;
1989 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
1990 id->reqid = x->props.reqid;
1991 id->flags = c->data.aevent;
1993 if (x->replay_esn) {
1994 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1995 xfrm_replay_state_esn_len(x->replay_esn),
1998 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
2003 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2008 if (id->flags & XFRM_AE_RTHR) {
2009 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2013 if (id->flags & XFRM_AE_ETHR) {
2014 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2015 x->replay_maxage * 10 / HZ);
2019 err = xfrm_mark_put(skb, &x->mark);
2023 err = xfrm_if_id_put(skb, x->if_id);
2027 nlmsg_end(skb, nlh);
2031 nlmsg_cancel(skb, nlh);
2035 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2036 struct nlattr **attrs)
2038 struct net *net = sock_net(skb->sk);
2039 struct xfrm_state *x;
2040 struct sk_buff *r_skb;
2045 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2046 struct xfrm_usersa_id *id = &p->sa_id;
2048 mark = xfrm_mark_get(attrs, &m);
2050 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2054 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2055 if (r_skb == NULL) {
2061 * XXX: is this lock really needed - none of the other
2062 * gets lock (the concern is things getting updated
2063 * while we are still reading) - jhs
2065 spin_lock_bh(&x->lock);
2066 c.data.aevent = p->flags;
2067 c.seq = nlh->nlmsg_seq;
2068 c.portid = nlh->nlmsg_pid;
2070 err = build_aevent(r_skb, x, &c);
2073 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2074 spin_unlock_bh(&x->lock);
2079 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2080 struct nlattr **attrs)
2082 struct net *net = sock_net(skb->sk);
2083 struct xfrm_state *x;
2088 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2089 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2090 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2091 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2092 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2093 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2095 if (!lt && !rp && !re && !et && !rt)
2098 /* pedantic mode - thou shalt sayeth replaceth */
2099 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2102 mark = xfrm_mark_get(attrs, &m);
2104 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2108 if (x->km.state != XFRM_STATE_VALID)
2111 err = xfrm_replay_verify_len(x->replay_esn, re);
2115 spin_lock_bh(&x->lock);
2116 xfrm_update_ae_params(x, attrs, 1);
2117 spin_unlock_bh(&x->lock);
2119 c.event = nlh->nlmsg_type;
2120 c.seq = nlh->nlmsg_seq;
2121 c.portid = nlh->nlmsg_pid;
2122 c.data.aevent = XFRM_AE_CU;
2123 km_state_notify(x, &c);
2130 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2131 struct nlattr **attrs)
2133 struct net *net = sock_net(skb->sk);
2135 u8 type = XFRM_POLICY_TYPE_MAIN;
2138 err = copy_from_user_policy_type(&type, attrs);
2142 err = xfrm_policy_flush(net, type, true);
2144 if (err == -ESRCH) /* empty table */
2150 c.event = nlh->nlmsg_type;
2151 c.seq = nlh->nlmsg_seq;
2152 c.portid = nlh->nlmsg_pid;
2154 km_policy_notify(NULL, 0, &c);
2158 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2159 struct nlattr **attrs)
2161 struct net *net = sock_net(skb->sk);
2162 struct xfrm_policy *xp;
2163 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2164 struct xfrm_userpolicy_info *p = &up->pol;
2165 u8 type = XFRM_POLICY_TYPE_MAIN;
2168 u32 mark = xfrm_mark_get(attrs, &m);
2171 err = copy_from_user_policy_type(&type, attrs);
2175 err = verify_policy_dir(p->dir);
2179 if (attrs[XFRMA_IF_ID])
2180 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2183 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
2185 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2186 struct xfrm_sec_ctx *ctx;
2188 err = verify_sec_ctx_len(attrs);
2194 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2196 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2200 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
2201 &p->sel, ctx, 0, &err);
2202 security_xfrm_policy_free(ctx);
2207 if (unlikely(xp->walk.dead))
2212 xfrm_policy_delete(xp, p->dir);
2213 xfrm_audit_policy_delete(xp, 1, true);
2215 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2222 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2223 struct nlattr **attrs)
2225 struct net *net = sock_net(skb->sk);
2226 struct xfrm_state *x;
2228 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2229 struct xfrm_usersa_info *p = &ue->state;
2231 u32 mark = xfrm_mark_get(attrs, &m);
2233 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2239 spin_lock_bh(&x->lock);
2241 if (x->km.state != XFRM_STATE_VALID)
2243 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2246 __xfrm_state_delete(x);
2247 xfrm_audit_state_delete(x, 1, true);
2251 spin_unlock_bh(&x->lock);
2256 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2257 struct nlattr **attrs)
2259 struct net *net = sock_net(skb->sk);
2260 struct xfrm_policy *xp;
2261 struct xfrm_user_tmpl *ut;
2263 struct nlattr *rt = attrs[XFRMA_TMPL];
2264 struct xfrm_mark mark;
2266 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2267 struct xfrm_state *x = xfrm_state_alloc(net);
2273 xfrm_mark_get(attrs, &mark);
2275 err = verify_newpolicy_info(&ua->policy);
2280 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2284 memcpy(&x->id, &ua->id, sizeof(ua->id));
2285 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2286 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2287 xp->mark.m = x->mark.m = mark.m;
2288 xp->mark.v = x->mark.v = mark.v;
2290 /* extract the templates and for each call km_key */
2291 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2292 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2293 memcpy(&x->id, &t->id, sizeof(x->id));
2294 x->props.mode = t->mode;
2295 x->props.reqid = t->reqid;
2296 x->props.family = ut->family;
2297 t->aalgos = ua->aalgos;
2298 t->ealgos = ua->ealgos;
2299 t->calgos = ua->calgos;
2300 err = km_query(x, t, xp);
2315 #ifdef CONFIG_XFRM_MIGRATE
2316 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2317 struct xfrm_kmaddress *k,
2318 struct nlattr **attrs, int *num)
2320 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2321 struct xfrm_user_migrate *um;
2325 struct xfrm_user_kmaddress *uk;
2327 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2328 memcpy(&k->local, &uk->local, sizeof(k->local));
2329 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2330 k->family = uk->family;
2331 k->reserved = uk->reserved;
2335 num_migrate = nla_len(rt) / sizeof(*um);
2337 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2340 for (i = 0; i < num_migrate; i++, um++, ma++) {
2341 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2342 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2343 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2344 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2346 ma->proto = um->proto;
2347 ma->mode = um->mode;
2348 ma->reqid = um->reqid;
2350 ma->old_family = um->old_family;
2351 ma->new_family = um->new_family;
2358 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2359 struct nlattr **attrs)
2361 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2362 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2363 struct xfrm_kmaddress km, *kmp;
2367 struct net *net = sock_net(skb->sk);
2368 struct xfrm_encap_tmpl *encap = NULL;
2370 if (attrs[XFRMA_MIGRATE] == NULL)
2373 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2375 err = copy_from_user_policy_type(&type, attrs);
2379 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2386 if (attrs[XFRMA_ENCAP]) {
2387 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2388 sizeof(*encap), GFP_KERNEL);
2393 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2400 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2401 struct nlattr **attrs)
2403 return -ENOPROTOOPT;
2407 #ifdef CONFIG_XFRM_MIGRATE
2408 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2410 struct xfrm_user_migrate um;
2412 memset(&um, 0, sizeof(um));
2413 um.proto = m->proto;
2415 um.reqid = m->reqid;
2416 um.old_family = m->old_family;
2417 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2418 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2419 um.new_family = m->new_family;
2420 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2421 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2423 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2426 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2428 struct xfrm_user_kmaddress uk;
2430 memset(&uk, 0, sizeof(uk));
2431 uk.family = k->family;
2432 uk.reserved = k->reserved;
2433 memcpy(&uk.local, &k->local, sizeof(uk.local));
2434 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2436 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2439 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2442 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2443 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2444 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2445 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2446 + userpolicy_type_attrsize();
2449 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2450 int num_migrate, const struct xfrm_kmaddress *k,
2451 const struct xfrm_selector *sel,
2452 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2454 const struct xfrm_migrate *mp;
2455 struct xfrm_userpolicy_id *pol_id;
2456 struct nlmsghdr *nlh;
2459 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2463 pol_id = nlmsg_data(nlh);
2464 /* copy data from selector, dir, and type to the pol_id */
2465 memset(pol_id, 0, sizeof(*pol_id));
2466 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2470 err = copy_to_user_kmaddress(k, skb);
2475 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2479 err = copy_to_user_policy_type(type, skb);
2482 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2483 err = copy_to_user_migrate(mp, skb);
2488 nlmsg_end(skb, nlh);
2492 nlmsg_cancel(skb, nlh);
2496 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2497 const struct xfrm_migrate *m, int num_migrate,
2498 const struct xfrm_kmaddress *k,
2499 const struct xfrm_encap_tmpl *encap)
2501 struct net *net = &init_net;
2502 struct sk_buff *skb;
2505 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2511 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2514 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2517 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2518 const struct xfrm_migrate *m, int num_migrate,
2519 const struct xfrm_kmaddress *k,
2520 const struct xfrm_encap_tmpl *encap)
2522 return -ENOPROTOOPT;
2526 #define XMSGSIZE(type) sizeof(struct type)
2528 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2529 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2530 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2531 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2532 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2533 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2534 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2535 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2536 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2537 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2538 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2539 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2540 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2541 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2542 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2543 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2544 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2545 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2546 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2547 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2548 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2549 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2554 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2555 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2556 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2557 [XFRMA_LASTUSED] = { .type = NLA_U64},
2558 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2559 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2560 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2561 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2562 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2563 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2564 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2565 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2566 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2567 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2568 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2569 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2570 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2571 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2572 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2573 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2574 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2575 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2576 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2577 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2578 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2579 [XFRMA_PROTO] = { .type = NLA_U8 },
2580 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2581 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2582 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2583 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2584 [XFRMA_IF_ID] = { .type = NLA_U32 },
2587 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2588 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2589 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2592 static const struct xfrm_link {
2593 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2594 int (*start)(struct netlink_callback *);
2595 int (*dump)(struct sk_buff *, struct netlink_callback *);
2596 int (*done)(struct netlink_callback *);
2597 const struct nla_policy *nla_pol;
2599 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2600 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2601 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2602 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2603 .dump = xfrm_dump_sa,
2604 .done = xfrm_dump_sa_done },
2605 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2606 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2607 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2608 .start = xfrm_dump_policy_start,
2609 .dump = xfrm_dump_policy,
2610 .done = xfrm_dump_policy_done },
2611 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2612 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2613 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2614 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2615 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2616 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2617 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2618 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2619 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2620 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2621 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2622 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2623 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2624 .nla_pol = xfrma_spd_policy,
2625 .nla_max = XFRMA_SPD_MAX },
2626 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2629 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2630 struct netlink_ext_ack *extack)
2632 struct net *net = sock_net(skb->sk);
2633 struct nlattr *attrs[XFRMA_MAX+1];
2634 const struct xfrm_link *link;
2637 if (in_compat_syscall())
2640 type = nlh->nlmsg_type;
2641 if (type > XFRM_MSG_MAX)
2644 type -= XFRM_MSG_BASE;
2645 link = &xfrm_dispatch[type];
2647 /* All operations require privileges, even GET */
2648 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2651 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2652 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2653 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2654 if (link->dump == NULL)
2658 struct netlink_dump_control c = {
2659 .start = link->start,
2663 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2667 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2668 link->nla_max ? : XFRMA_MAX,
2669 link->nla_pol ? : xfrma_policy, extack);
2673 if (link->doit == NULL)
2676 return link->doit(skb, nlh, attrs);
2679 static void xfrm_netlink_rcv(struct sk_buff *skb)
2681 struct net *net = sock_net(skb->sk);
2683 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2684 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2685 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2688 static inline unsigned int xfrm_expire_msgsize(void)
2690 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2691 + nla_total_size(sizeof(struct xfrm_mark));
2694 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2696 struct xfrm_user_expire *ue;
2697 struct nlmsghdr *nlh;
2700 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2704 ue = nlmsg_data(nlh);
2705 copy_to_user_state(x, &ue->state);
2706 ue->hard = (c->data.hard != 0) ? 1 : 0;
2707 /* clear the padding bytes */
2708 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
2710 err = xfrm_mark_put(skb, &x->mark);
2714 err = xfrm_if_id_put(skb, x->if_id);
2718 nlmsg_end(skb, nlh);
2722 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2724 struct net *net = xs_net(x);
2725 struct sk_buff *skb;
2727 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2731 if (build_expire(skb, x, c) < 0) {
2736 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2739 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2741 struct net *net = xs_net(x);
2742 struct sk_buff *skb;
2745 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2749 err = build_aevent(skb, x, c);
2752 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
2755 static int xfrm_notify_sa_flush(const struct km_event *c)
2757 struct net *net = c->net;
2758 struct xfrm_usersa_flush *p;
2759 struct nlmsghdr *nlh;
2760 struct sk_buff *skb;
2761 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2763 skb = nlmsg_new(len, GFP_ATOMIC);
2767 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2773 p = nlmsg_data(nlh);
2774 p->proto = c->data.proto;
2776 nlmsg_end(skb, nlh);
2778 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2781 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
2785 l += nla_total_size(aead_len(x->aead));
2787 l += nla_total_size(sizeof(struct xfrm_algo) +
2788 (x->aalg->alg_key_len + 7) / 8);
2789 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2792 l += nla_total_size(xfrm_alg_len(x->ealg));
2794 l += nla_total_size(sizeof(*x->calg));
2796 l += nla_total_size(sizeof(*x->encap));
2798 l += nla_total_size(sizeof(x->tfcpad));
2800 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2802 l += nla_total_size(sizeof(struct xfrm_replay_state));
2804 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2805 x->security->ctx_len);
2807 l += nla_total_size(sizeof(*x->coaddr));
2808 if (x->props.extra_flags)
2809 l += nla_total_size(sizeof(x->props.extra_flags));
2811 l += nla_total_size(sizeof(x->xso));
2812 if (x->props.smark.v | x->props.smark.m) {
2813 l += nla_total_size(sizeof(x->props.smark.v));
2814 l += nla_total_size(sizeof(x->props.smark.m));
2817 l += nla_total_size(sizeof(x->if_id));
2819 /* Must count x->lastused as it may become non-zero behind our back. */
2820 l += nla_total_size_64bit(sizeof(u64));
2825 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2827 struct net *net = xs_net(x);
2828 struct xfrm_usersa_info *p;
2829 struct xfrm_usersa_id *id;
2830 struct nlmsghdr *nlh;
2831 struct sk_buff *skb;
2832 unsigned int len = xfrm_sa_len(x);
2833 unsigned int headlen;
2836 headlen = sizeof(*p);
2837 if (c->event == XFRM_MSG_DELSA) {
2838 len += nla_total_size(headlen);
2839 headlen = sizeof(*id);
2840 len += nla_total_size(sizeof(struct xfrm_mark));
2842 len += NLMSG_ALIGN(headlen);
2844 skb = nlmsg_new(len, GFP_ATOMIC);
2848 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2853 p = nlmsg_data(nlh);
2854 if (c->event == XFRM_MSG_DELSA) {
2855 struct nlattr *attr;
2857 id = nlmsg_data(nlh);
2858 memset(id, 0, sizeof(*id));
2859 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2860 id->spi = x->id.spi;
2861 id->family = x->props.family;
2862 id->proto = x->id.proto;
2864 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2871 err = copy_to_user_state_extra(x, p, skb);
2875 nlmsg_end(skb, nlh);
2877 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
2884 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2888 case XFRM_MSG_EXPIRE:
2889 return xfrm_exp_state_notify(x, c);
2890 case XFRM_MSG_NEWAE:
2891 return xfrm_aevent_state_notify(x, c);
2892 case XFRM_MSG_DELSA:
2893 case XFRM_MSG_UPDSA:
2894 case XFRM_MSG_NEWSA:
2895 return xfrm_notify_sa(x, c);
2896 case XFRM_MSG_FLUSHSA:
2897 return xfrm_notify_sa_flush(c);
2899 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2908 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2909 struct xfrm_policy *xp)
2911 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2912 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2913 + nla_total_size(sizeof(struct xfrm_mark))
2914 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2915 + userpolicy_type_attrsize();
2918 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2919 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2921 __u32 seq = xfrm_get_acqseq();
2922 struct xfrm_user_acquire *ua;
2923 struct nlmsghdr *nlh;
2926 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2930 ua = nlmsg_data(nlh);
2931 memcpy(&ua->id, &x->id, sizeof(ua->id));
2932 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2933 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2934 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2935 ua->aalgos = xt->aalgos;
2936 ua->ealgos = xt->ealgos;
2937 ua->calgos = xt->calgos;
2938 ua->seq = x->km.seq = seq;
2940 err = copy_to_user_tmpl(xp, skb);
2942 err = copy_to_user_state_sec_ctx(x, skb);
2944 err = copy_to_user_policy_type(xp->type, skb);
2946 err = xfrm_mark_put(skb, &xp->mark);
2948 err = xfrm_if_id_put(skb, xp->if_id);
2950 nlmsg_cancel(skb, nlh);
2954 nlmsg_end(skb, nlh);
2958 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2959 struct xfrm_policy *xp)
2961 struct net *net = xs_net(x);
2962 struct sk_buff *skb;
2965 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2969 err = build_acquire(skb, x, xt, xp);
2972 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
2975 /* User gives us xfrm_user_policy_info followed by an array of 0
2976 * or more templates.
2978 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2979 u8 *data, int len, int *dir)
2981 struct net *net = sock_net(sk);
2982 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2983 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2984 struct xfrm_policy *xp;
2987 switch (sk->sk_family) {
2989 if (opt != IP_XFRM_POLICY) {
2994 #if IS_ENABLED(CONFIG_IPV6)
2996 if (opt != IPV6_XFRM_POLICY) {
3009 if (len < sizeof(*p) ||
3010 verify_newpolicy_info(p))
3013 nr = ((len - sizeof(*p)) / sizeof(*ut));
3014 if (validate_tmpl(nr, ut, p->sel.family))
3017 if (p->dir > XFRM_POLICY_OUT)
3020 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3026 copy_from_user_policy(xp, p);
3027 xp->type = XFRM_POLICY_TYPE_MAIN;
3028 copy_templates(xp, ut, nr);
3035 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3037 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3038 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3039 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3040 + nla_total_size(sizeof(struct xfrm_mark))
3041 + userpolicy_type_attrsize();
3044 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3045 int dir, const struct km_event *c)
3047 struct xfrm_user_polexpire *upe;
3048 int hard = c->data.hard;
3049 struct nlmsghdr *nlh;
3052 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3056 upe = nlmsg_data(nlh);
3057 copy_to_user_policy(xp, &upe->pol, dir);
3058 err = copy_to_user_tmpl(xp, skb);
3060 err = copy_to_user_sec_ctx(xp, skb);
3062 err = copy_to_user_policy_type(xp->type, skb);
3064 err = xfrm_mark_put(skb, &xp->mark);
3066 err = xfrm_if_id_put(skb, xp->if_id);
3068 nlmsg_cancel(skb, nlh);
3073 nlmsg_end(skb, nlh);
3077 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3079 struct net *net = xp_net(xp);
3080 struct sk_buff *skb;
3083 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3087 err = build_polexpire(skb, xp, dir, c);
3090 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3093 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3095 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3096 struct net *net = xp_net(xp);
3097 struct xfrm_userpolicy_info *p;
3098 struct xfrm_userpolicy_id *id;
3099 struct nlmsghdr *nlh;
3100 struct sk_buff *skb;
3101 unsigned int headlen;
3104 headlen = sizeof(*p);
3105 if (c->event == XFRM_MSG_DELPOLICY) {
3106 len += nla_total_size(headlen);
3107 headlen = sizeof(*id);
3109 len += userpolicy_type_attrsize();
3110 len += nla_total_size(sizeof(struct xfrm_mark));
3111 len += NLMSG_ALIGN(headlen);
3113 skb = nlmsg_new(len, GFP_ATOMIC);
3117 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3122 p = nlmsg_data(nlh);
3123 if (c->event == XFRM_MSG_DELPOLICY) {
3124 struct nlattr *attr;
3126 id = nlmsg_data(nlh);
3127 memset(id, 0, sizeof(*id));
3130 id->index = xp->index;
3132 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3134 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3142 copy_to_user_policy(xp, p, dir);
3143 err = copy_to_user_tmpl(xp, skb);
3145 err = copy_to_user_policy_type(xp->type, skb);
3147 err = xfrm_mark_put(skb, &xp->mark);
3149 err = xfrm_if_id_put(skb, xp->if_id);
3153 nlmsg_end(skb, nlh);
3155 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3162 static int xfrm_notify_policy_flush(const struct km_event *c)
3164 struct net *net = c->net;
3165 struct nlmsghdr *nlh;
3166 struct sk_buff *skb;
3169 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3173 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3177 err = copy_to_user_policy_type(c->data.type, skb);
3181 nlmsg_end(skb, nlh);
3183 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3190 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3194 case XFRM_MSG_NEWPOLICY:
3195 case XFRM_MSG_UPDPOLICY:
3196 case XFRM_MSG_DELPOLICY:
3197 return xfrm_notify_policy(xp, dir, c);
3198 case XFRM_MSG_FLUSHPOLICY:
3199 return xfrm_notify_policy_flush(c);
3200 case XFRM_MSG_POLEXPIRE:
3201 return xfrm_exp_policy_notify(xp, dir, c);
3203 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3211 static inline unsigned int xfrm_report_msgsize(void)
3213 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3216 static int build_report(struct sk_buff *skb, u8 proto,
3217 struct xfrm_selector *sel, xfrm_address_t *addr)
3219 struct xfrm_user_report *ur;
3220 struct nlmsghdr *nlh;
3222 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3226 ur = nlmsg_data(nlh);
3228 memcpy(&ur->sel, sel, sizeof(ur->sel));
3231 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3233 nlmsg_cancel(skb, nlh);
3237 nlmsg_end(skb, nlh);
3241 static int xfrm_send_report(struct net *net, u8 proto,
3242 struct xfrm_selector *sel, xfrm_address_t *addr)
3244 struct sk_buff *skb;
3247 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3251 err = build_report(skb, proto, sel, addr);
3254 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3257 static inline unsigned int xfrm_mapping_msgsize(void)
3259 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3262 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3263 xfrm_address_t *new_saddr, __be16 new_sport)
3265 struct xfrm_user_mapping *um;
3266 struct nlmsghdr *nlh;
3268 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3272 um = nlmsg_data(nlh);
3274 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3275 um->id.spi = x->id.spi;
3276 um->id.family = x->props.family;
3277 um->id.proto = x->id.proto;
3278 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3279 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3280 um->new_sport = new_sport;
3281 um->old_sport = x->encap->encap_sport;
3282 um->reqid = x->props.reqid;
3284 nlmsg_end(skb, nlh);
3288 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3291 struct net *net = xs_net(x);
3292 struct sk_buff *skb;
3295 if (x->id.proto != IPPROTO_ESP)
3301 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3305 err = build_mapping(skb, x, ipaddr, sport);
3308 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3311 static bool xfrm_is_alive(const struct km_event *c)
3313 return (bool)xfrm_acquire_is_on(c->net);
3316 static struct xfrm_mgr netlink_mgr = {
3317 .notify = xfrm_send_state_notify,
3318 .acquire = xfrm_send_acquire,
3319 .compile_policy = xfrm_compile_policy,
3320 .notify_policy = xfrm_send_policy_notify,
3321 .report = xfrm_send_report,
3322 .migrate = xfrm_send_migrate,
3323 .new_mapping = xfrm_send_mapping,
3324 .is_alive = xfrm_is_alive,
3327 static int __net_init xfrm_user_net_init(struct net *net)
3330 struct netlink_kernel_cfg cfg = {
3331 .groups = XFRMNLGRP_MAX,
3332 .input = xfrm_netlink_rcv,
3335 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3338 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3339 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3343 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3346 list_for_each_entry(net, net_exit_list, exit_list)
3347 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3349 list_for_each_entry(net, net_exit_list, exit_list)
3350 netlink_kernel_release(net->xfrm.nlsk_stash);
3353 static struct pernet_operations xfrm_user_net_ops = {
3354 .init = xfrm_user_net_init,
3355 .exit_batch = xfrm_user_net_exit,
3358 static int __init xfrm_user_init(void)
3362 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3364 rv = register_pernet_subsys(&xfrm_user_net_ops);
3367 rv = xfrm_register_km(&netlink_mgr);
3369 unregister_pernet_subsys(&xfrm_user_net_ops);
3373 static void __exit xfrm_user_exit(void)
3375 xfrm_unregister_km(&netlink_mgr);
3376 unregister_pernet_subsys(&xfrm_user_net_ops);
3379 module_init(xfrm_user_init);
3380 module_exit(xfrm_user_exit);
3381 MODULE_LICENSE("GPL");
3382 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);