1 // SPDX-License-Identifier: GPL-2.0-only
2 /* xfrm_user.c: User interface to configure xfrm engine.
8 * Kazunori MIYAZAWA @USAGI
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 > nla_len(rt) ||
114 uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
120 static inline int verify_replay(struct xfrm_usersa_info *p,
121 struct nlattr **attrs)
123 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
124 struct xfrm_replay_state_esn *rs;
127 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
131 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
134 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
135 nla_len(rt) != sizeof(*rs))
138 /* As only ESP and AH support ESN feature. */
139 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
142 if (p->replay_window != 0)
148 static int verify_newsa_info(struct xfrm_usersa_info *p,
149 struct nlattr **attrs)
159 #if IS_ENABLED(CONFIG_IPV6)
170 switch (p->sel.family) {
175 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
181 #if IS_ENABLED(CONFIG_IPV6)
182 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
196 switch (p->id.proto) {
198 if ((!attrs[XFRMA_ALG_AUTH] &&
199 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
200 attrs[XFRMA_ALG_AEAD] ||
201 attrs[XFRMA_ALG_CRYPT] ||
202 attrs[XFRMA_ALG_COMP] ||
208 if (attrs[XFRMA_ALG_COMP])
210 if (!attrs[XFRMA_ALG_AUTH] &&
211 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
212 !attrs[XFRMA_ALG_CRYPT] &&
213 !attrs[XFRMA_ALG_AEAD])
215 if ((attrs[XFRMA_ALG_AUTH] ||
216 attrs[XFRMA_ALG_AUTH_TRUNC] ||
217 attrs[XFRMA_ALG_CRYPT]) &&
218 attrs[XFRMA_ALG_AEAD])
220 if (attrs[XFRMA_TFCPAD] &&
221 p->mode != XFRM_MODE_TUNNEL)
226 if (!attrs[XFRMA_ALG_COMP] ||
227 attrs[XFRMA_ALG_AEAD] ||
228 attrs[XFRMA_ALG_AUTH] ||
229 attrs[XFRMA_ALG_AUTH_TRUNC] ||
230 attrs[XFRMA_ALG_CRYPT] ||
231 attrs[XFRMA_TFCPAD] ||
232 (ntohl(p->id.spi) >= 0x10000))
236 #if IS_ENABLED(CONFIG_IPV6)
237 case IPPROTO_DSTOPTS:
238 case IPPROTO_ROUTING:
239 if (attrs[XFRMA_ALG_COMP] ||
240 attrs[XFRMA_ALG_AUTH] ||
241 attrs[XFRMA_ALG_AUTH_TRUNC] ||
242 attrs[XFRMA_ALG_AEAD] ||
243 attrs[XFRMA_ALG_CRYPT] ||
244 attrs[XFRMA_ENCAP] ||
245 attrs[XFRMA_SEC_CTX] ||
246 attrs[XFRMA_TFCPAD] ||
247 !attrs[XFRMA_COADDR])
256 if ((err = verify_aead(attrs)))
258 if ((err = verify_auth_trunc(attrs)))
260 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
262 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
264 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
266 if ((err = verify_sec_ctx_len(attrs)))
268 if ((err = verify_replay(p, attrs)))
273 case XFRM_MODE_TRANSPORT:
274 case XFRM_MODE_TUNNEL:
275 case XFRM_MODE_ROUTEOPTIMIZATION:
289 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
290 struct xfrm_algo_desc *(*get_byname)(const char *, int),
293 struct xfrm_algo *p, *ualg;
294 struct xfrm_algo_desc *algo;
299 ualg = nla_data(rta);
301 algo = get_byname(ualg->alg_name, 1);
304 *props = algo->desc.sadb_alg_id;
306 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
310 strcpy(p->alg_name, algo->name);
315 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
317 struct xfrm_algo *p, *ualg;
318 struct xfrm_algo_desc *algo;
323 ualg = nla_data(rta);
325 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
328 x->props.ealgo = algo->desc.sadb_alg_id;
330 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
334 strcpy(p->alg_name, algo->name);
336 x->geniv = algo->uinfo.encr.geniv;
340 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
343 struct xfrm_algo *ualg;
344 struct xfrm_algo_auth *p;
345 struct xfrm_algo_desc *algo;
350 ualg = nla_data(rta);
352 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
355 *props = algo->desc.sadb_alg_id;
357 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
361 strcpy(p->alg_name, algo->name);
362 p->alg_key_len = ualg->alg_key_len;
363 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
364 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
370 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
373 struct xfrm_algo_auth *p, *ualg;
374 struct xfrm_algo_desc *algo;
379 ualg = nla_data(rta);
381 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
384 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
386 *props = algo->desc.sadb_alg_id;
388 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
392 strcpy(p->alg_name, algo->name);
393 if (!p->alg_trunc_len)
394 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
400 static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
402 struct xfrm_algo_aead *p, *ualg;
403 struct xfrm_algo_desc *algo;
408 ualg = nla_data(rta);
410 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
413 x->props.ealgo = algo->desc.sadb_alg_id;
415 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
419 strcpy(p->alg_name, algo->name);
421 x->geniv = algo->uinfo.aead.geniv;
425 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
428 struct xfrm_replay_state_esn *up;
431 if (!replay_esn || !rp)
435 ulen = xfrm_replay_state_esn_len(up);
437 /* Check the overall length and the internal bitmap length to avoid
438 * potential overflow. */
439 if (nla_len(rp) < (int)ulen ||
440 xfrm_replay_state_esn_len(replay_esn) != ulen ||
441 replay_esn->bmp_len != up->bmp_len)
444 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
450 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
451 struct xfrm_replay_state_esn **preplay_esn,
454 struct xfrm_replay_state_esn *p, *pp, *up;
455 unsigned int klen, ulen;
461 klen = xfrm_replay_state_esn_len(up);
462 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
464 p = kzalloc(klen, GFP_KERNEL);
468 pp = kzalloc(klen, GFP_KERNEL);
475 memcpy(pp, up, ulen);
483 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
485 unsigned int len = 0;
488 len += sizeof(struct xfrm_user_sec_ctx);
489 len += xfrm_ctx->ctx_len;
494 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
496 memcpy(&x->id, &p->id, sizeof(x->id));
497 memcpy(&x->sel, &p->sel, sizeof(x->sel));
498 memcpy(&x->lft, &p->lft, sizeof(x->lft));
499 x->props.mode = p->mode;
500 x->props.replay_window = min_t(unsigned int, p->replay_window,
501 sizeof(x->replay.bitmap) * 8);
502 x->props.reqid = p->reqid;
503 x->props.family = p->family;
504 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
505 x->props.flags = p->flags;
507 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
508 x->sel.family = p->family;
512 * someday when pfkey also has support, we could have the code
513 * somehow made shareable and move it to xfrm_state.c - JHS
516 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
519 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
520 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
521 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
522 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
523 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
526 struct xfrm_replay_state_esn *replay_esn;
527 replay_esn = nla_data(re);
528 memcpy(x->replay_esn, replay_esn,
529 xfrm_replay_state_esn_len(replay_esn));
530 memcpy(x->preplay_esn, replay_esn,
531 xfrm_replay_state_esn_len(replay_esn));
535 struct xfrm_replay_state *replay;
536 replay = nla_data(rp);
537 memcpy(&x->replay, replay, sizeof(*replay));
538 memcpy(&x->preplay, replay, sizeof(*replay));
542 struct xfrm_lifetime_cur *ltime;
543 ltime = nla_data(lt);
544 x->curlft.bytes = ltime->bytes;
545 x->curlft.packets = ltime->packets;
546 x->curlft.add_time = ltime->add_time;
547 x->curlft.use_time = ltime->use_time;
551 x->replay_maxage = nla_get_u32(et);
554 x->replay_maxdiff = nla_get_u32(rt);
557 static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
559 if (attrs[XFRMA_SET_MARK]) {
560 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
561 if (attrs[XFRMA_SET_MARK_MASK])
562 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
570 static struct xfrm_state *xfrm_state_construct(struct net *net,
571 struct xfrm_usersa_info *p,
572 struct nlattr **attrs,
575 struct xfrm_state *x = xfrm_state_alloc(net);
581 copy_from_user_state(x, p);
583 if (attrs[XFRMA_ENCAP]) {
584 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
585 sizeof(*x->encap), GFP_KERNEL);
586 if (x->encap == NULL)
590 if (attrs[XFRMA_COADDR]) {
591 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
592 sizeof(*x->coaddr), GFP_KERNEL);
593 if (x->coaddr == NULL)
597 if (attrs[XFRMA_SA_EXTRA_FLAGS])
598 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
600 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
602 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
603 attrs[XFRMA_ALG_AUTH_TRUNC])))
605 if (!x->props.aalgo) {
606 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
607 attrs[XFRMA_ALG_AUTH])))
610 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
612 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
613 xfrm_calg_get_byname,
614 attrs[XFRMA_ALG_COMP])))
617 if (attrs[XFRMA_TFCPAD])
618 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
620 xfrm_mark_get(attrs, &x->mark);
622 xfrm_smark_init(attrs, &x->props.smark);
624 if (attrs[XFRMA_IF_ID])
625 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
627 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
631 if (attrs[XFRMA_SEC_CTX]) {
632 err = security_xfrm_state_alloc(x,
633 nla_data(attrs[XFRMA_SEC_CTX]));
638 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
639 attrs[XFRMA_REPLAY_ESN_VAL])))
643 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
644 /* sysctl_xfrm_aevent_etime is in 100ms units */
645 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
647 if ((err = xfrm_init_replay(x)))
650 /* override default values from above */
651 xfrm_update_ae_params(x, attrs, 0);
653 /* configure the hardware if offload is requested */
654 if (attrs[XFRMA_OFFLOAD_DEV]) {
655 err = xfrm_dev_state_add(net, x,
656 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
664 x->km.state = XFRM_STATE_DEAD;
671 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
672 struct nlattr **attrs)
674 struct net *net = sock_net(skb->sk);
675 struct xfrm_usersa_info *p = nlmsg_data(nlh);
676 struct xfrm_state *x;
680 err = verify_newsa_info(p, attrs);
684 x = xfrm_state_construct(net, p, attrs, &err);
689 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
690 err = xfrm_state_add(x);
692 err = xfrm_state_update(x);
694 xfrm_audit_state_add(x, err ? 0 : 1, true);
697 x->km.state = XFRM_STATE_DEAD;
698 xfrm_dev_state_delete(x);
703 if (x->km.state == XFRM_STATE_VOID)
704 x->km.state = XFRM_STATE_VALID;
706 c.seq = nlh->nlmsg_seq;
707 c.portid = nlh->nlmsg_pid;
708 c.event = nlh->nlmsg_type;
710 km_state_notify(x, &c);
716 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
717 struct xfrm_usersa_id *p,
718 struct nlattr **attrs,
721 struct xfrm_state *x = NULL;
724 u32 mark = xfrm_mark_get(attrs, &m);
726 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
728 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
730 xfrm_address_t *saddr = NULL;
732 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
739 x = xfrm_state_lookup_byaddr(net, mark,
741 p->proto, p->family);
750 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
751 struct nlattr **attrs)
753 struct net *net = sock_net(skb->sk);
754 struct xfrm_state *x;
757 struct xfrm_usersa_id *p = nlmsg_data(nlh);
759 x = xfrm_user_state_lookup(net, p, attrs, &err);
763 if ((err = security_xfrm_state_delete(x)) != 0)
766 if (xfrm_state_kern(x)) {
771 err = xfrm_state_delete(x);
776 c.seq = nlh->nlmsg_seq;
777 c.portid = nlh->nlmsg_pid;
778 c.event = nlh->nlmsg_type;
779 km_state_notify(x, &c);
782 xfrm_audit_state_delete(x, err ? 0 : 1, true);
787 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
789 memset(p, 0, sizeof(*p));
790 memcpy(&p->id, &x->id, sizeof(p->id));
791 memcpy(&p->sel, &x->sel, sizeof(p->sel));
792 memcpy(&p->lft, &x->lft, sizeof(p->lft));
793 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
794 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
795 put_unaligned(x->stats.replay, &p->stats.replay);
796 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
797 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
798 p->mode = x->props.mode;
799 p->replay_window = x->props.replay_window;
800 p->reqid = x->props.reqid;
801 p->family = x->props.family;
802 p->flags = x->props.flags;
806 struct xfrm_dump_info {
807 struct sk_buff *in_skb;
808 struct sk_buff *out_skb;
813 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
815 struct xfrm_user_sec_ctx *uctx;
817 int ctx_size = sizeof(*uctx) + s->ctx_len;
819 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
823 uctx = nla_data(attr);
824 uctx->exttype = XFRMA_SEC_CTX;
825 uctx->len = ctx_size;
826 uctx->ctx_doi = s->ctx_doi;
827 uctx->ctx_alg = s->ctx_alg;
828 uctx->ctx_len = s->ctx_len;
829 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
834 static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
836 struct xfrm_user_offload *xuo;
839 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
843 xuo = nla_data(attr);
844 memset(xuo, 0, sizeof(*xuo));
845 xuo->ifindex = xso->dev->ifindex;
846 xuo->flags = xso->flags;
851 static bool xfrm_redact(void)
853 return IS_ENABLED(CONFIG_SECURITY) &&
854 security_locked_down(LOCKDOWN_XFRM_SECRET);
857 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
859 struct xfrm_algo *algo;
860 struct xfrm_algo_auth *ap;
862 bool redact_secret = xfrm_redact();
864 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
865 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
868 algo = nla_data(nla);
869 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
871 if (redact_secret && auth->alg_key_len)
872 memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8);
874 memcpy(algo->alg_key, auth->alg_key,
875 (auth->alg_key_len + 7) / 8);
876 algo->alg_key_len = auth->alg_key_len;
878 nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth));
882 memcpy(ap, auth, sizeof(struct xfrm_algo_auth));
883 if (redact_secret && auth->alg_key_len)
884 memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8);
886 memcpy(ap->alg_key, auth->alg_key,
887 (auth->alg_key_len + 7) / 8);
891 static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb)
893 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead));
894 struct xfrm_algo_aead *ap;
895 bool redact_secret = xfrm_redact();
901 memcpy(ap, aead, sizeof(*aead));
903 if (redact_secret && aead->alg_key_len)
904 memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8);
906 memcpy(ap->alg_key, aead->alg_key,
907 (aead->alg_key_len + 7) / 8);
911 static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
913 struct xfrm_algo *ap;
914 bool redact_secret = xfrm_redact();
915 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT,
921 memcpy(ap, ealg, sizeof(*ealg));
923 if (redact_secret && ealg->alg_key_len)
924 memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8);
926 memcpy(ap->alg_key, ealg->alg_key,
927 (ealg->alg_key_len + 7) / 8);
932 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
937 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
939 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
944 /* Don't change this without updating xfrm_sa_len! */
945 static int copy_to_user_state_extra(struct xfrm_state *x,
946 struct xfrm_usersa_info *p,
951 copy_to_user_state(x, p);
953 if (x->props.extra_flags) {
954 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
955 x->props.extra_flags);
961 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
966 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
972 ret = copy_to_user_aead(x->aead, skb);
977 ret = copy_to_user_auth(x->aalg, skb);
982 ret = copy_to_user_ealg(x->ealg, skb);
987 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
992 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
997 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
1001 ret = xfrm_mark_put(skb, &x->mark);
1005 ret = xfrm_smark_put(skb, &x->props.smark);
1010 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1011 xfrm_replay_state_esn_len(x->replay_esn),
1014 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1019 ret = copy_user_offload(&x->xso, skb);
1023 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
1028 ret = copy_sec_ctx(x->security, skb);
1033 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
1035 struct xfrm_dump_info *sp = ptr;
1036 struct sk_buff *in_skb = sp->in_skb;
1037 struct sk_buff *skb = sp->out_skb;
1038 struct xfrm_translator *xtr;
1039 struct xfrm_usersa_info *p;
1040 struct nlmsghdr *nlh;
1043 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1044 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
1048 p = nlmsg_data(nlh);
1050 err = copy_to_user_state_extra(x, p, skb);
1052 nlmsg_cancel(skb, nlh);
1055 nlmsg_end(skb, nlh);
1057 xtr = xfrm_get_translator();
1059 err = xtr->alloc_compat(skb, nlh);
1061 xfrm_put_translator(xtr);
1063 nlmsg_cancel(skb, nlh);
1071 static int xfrm_dump_sa_done(struct netlink_callback *cb)
1073 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1074 struct sock *sk = cb->skb->sk;
1075 struct net *net = sock_net(sk);
1078 xfrm_state_walk_done(walk, net);
1082 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1084 struct net *net = sock_net(skb->sk);
1085 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1086 struct xfrm_dump_info info;
1088 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1089 sizeof(cb->args) - sizeof(cb->args[0]));
1091 info.in_skb = cb->skb;
1093 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1094 info.nlmsg_flags = NLM_F_MULTI;
1097 struct nlattr *attrs[XFRMA_MAX+1];
1098 struct xfrm_address_filter *filter = NULL;
1102 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1103 xfrma_policy, cb->extack);
1107 if (attrs[XFRMA_ADDRESS_FILTER]) {
1108 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1109 sizeof(*filter), GFP_KERNEL);
1114 if (attrs[XFRMA_PROTO])
1115 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1117 xfrm_state_walk_init(walk, proto, filter);
1121 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1126 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1127 struct xfrm_state *x, u32 seq)
1129 struct xfrm_dump_info info;
1130 struct sk_buff *skb;
1133 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1135 return ERR_PTR(-ENOMEM);
1137 info.in_skb = in_skb;
1139 info.nlmsg_seq = seq;
1140 info.nlmsg_flags = 0;
1142 err = dump_one_state(x, 0, &info);
1145 return ERR_PTR(err);
1151 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1152 * Must be called with RCU read lock.
1154 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1155 u32 pid, unsigned int group)
1157 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1158 struct xfrm_translator *xtr;
1165 xtr = xfrm_get_translator();
1167 int err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1169 xfrm_put_translator(xtr);
1176 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1179 static inline unsigned int xfrm_spdinfo_msgsize(void)
1181 return NLMSG_ALIGN(4)
1182 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1183 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1184 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1185 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1188 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1189 u32 portid, u32 seq, u32 flags)
1191 struct xfrmk_spdinfo si;
1192 struct xfrmu_spdinfo spc;
1193 struct xfrmu_spdhinfo sph;
1194 struct xfrmu_spdhthresh spt4, spt6;
1195 struct nlmsghdr *nlh;
1200 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1201 if (nlh == NULL) /* shouldn't really happen ... */
1204 f = nlmsg_data(nlh);
1206 xfrm_spd_getinfo(net, &si);
1207 spc.incnt = si.incnt;
1208 spc.outcnt = si.outcnt;
1209 spc.fwdcnt = si.fwdcnt;
1210 spc.inscnt = si.inscnt;
1211 spc.outscnt = si.outscnt;
1212 spc.fwdscnt = si.fwdscnt;
1213 sph.spdhcnt = si.spdhcnt;
1214 sph.spdhmcnt = si.spdhmcnt;
1217 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1219 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1220 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1221 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1222 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1223 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1225 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1227 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1229 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1231 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1233 nlmsg_cancel(skb, nlh);
1237 nlmsg_end(skb, nlh);
1241 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1242 struct nlattr **attrs)
1244 struct net *net = sock_net(skb->sk);
1245 struct xfrmu_spdhthresh *thresh4 = NULL;
1246 struct xfrmu_spdhthresh *thresh6 = NULL;
1248 /* selector prefixlen thresholds to hash policies */
1249 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1250 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1252 if (nla_len(rta) < sizeof(*thresh4))
1254 thresh4 = nla_data(rta);
1255 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1258 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1259 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1261 if (nla_len(rta) < sizeof(*thresh6))
1263 thresh6 = nla_data(rta);
1264 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1268 if (thresh4 || thresh6) {
1269 write_seqlock(&net->xfrm.policy_hthresh.lock);
1271 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1272 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1275 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1276 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1278 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1280 xfrm_policy_hash_rebuild(net);
1286 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1287 struct nlattr **attrs)
1289 struct net *net = sock_net(skb->sk);
1290 struct sk_buff *r_skb;
1291 u32 *flags = nlmsg_data(nlh);
1292 u32 sportid = NETLINK_CB(skb).portid;
1293 u32 seq = nlh->nlmsg_seq;
1296 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1300 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1303 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1306 static inline unsigned int xfrm_sadinfo_msgsize(void)
1308 return NLMSG_ALIGN(4)
1309 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1310 + nla_total_size(4); /* XFRMA_SAD_CNT */
1313 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1314 u32 portid, u32 seq, u32 flags)
1316 struct xfrmk_sadinfo si;
1317 struct xfrmu_sadhinfo sh;
1318 struct nlmsghdr *nlh;
1322 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1323 if (nlh == NULL) /* shouldn't really happen ... */
1326 f = nlmsg_data(nlh);
1328 xfrm_sad_getinfo(net, &si);
1330 sh.sadhmcnt = si.sadhmcnt;
1331 sh.sadhcnt = si.sadhcnt;
1333 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1335 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1337 nlmsg_cancel(skb, nlh);
1341 nlmsg_end(skb, nlh);
1345 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1346 struct nlattr **attrs)
1348 struct net *net = sock_net(skb->sk);
1349 struct sk_buff *r_skb;
1350 u32 *flags = nlmsg_data(nlh);
1351 u32 sportid = NETLINK_CB(skb).portid;
1352 u32 seq = nlh->nlmsg_seq;
1355 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1359 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1362 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1365 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1366 struct nlattr **attrs)
1368 struct net *net = sock_net(skb->sk);
1369 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1370 struct xfrm_state *x;
1371 struct sk_buff *resp_skb;
1374 x = xfrm_user_state_lookup(net, p, attrs, &err);
1378 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1379 if (IS_ERR(resp_skb)) {
1380 err = PTR_ERR(resp_skb);
1382 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1389 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1390 struct nlattr **attrs)
1392 struct net *net = sock_net(skb->sk);
1393 struct xfrm_state *x;
1394 struct xfrm_userspi_info *p;
1395 struct xfrm_translator *xtr;
1396 struct sk_buff *resp_skb;
1397 xfrm_address_t *daddr;
1404 p = nlmsg_data(nlh);
1405 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1409 family = p->info.family;
1410 daddr = &p->info.id.daddr;
1414 mark = xfrm_mark_get(attrs, &m);
1416 if (attrs[XFRMA_IF_ID])
1417 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1420 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1421 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1428 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1429 if_id, p->info.id.proto, daddr,
1436 err = xfrm_alloc_spi(x, p->min, p->max);
1440 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1441 if (IS_ERR(resp_skb)) {
1442 err = PTR_ERR(resp_skb);
1446 xtr = xfrm_get_translator();
1448 err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1450 xfrm_put_translator(xtr);
1452 kfree_skb(resp_skb);
1457 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1465 static int verify_policy_dir(u8 dir)
1468 case XFRM_POLICY_IN:
1469 case XFRM_POLICY_OUT:
1470 case XFRM_POLICY_FWD:
1480 static int verify_policy_type(u8 type)
1483 case XFRM_POLICY_TYPE_MAIN:
1484 #ifdef CONFIG_XFRM_SUB_POLICY
1485 case XFRM_POLICY_TYPE_SUB:
1496 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1501 case XFRM_SHARE_ANY:
1502 case XFRM_SHARE_SESSION:
1503 case XFRM_SHARE_USER:
1504 case XFRM_SHARE_UNIQUE:
1511 switch (p->action) {
1512 case XFRM_POLICY_ALLOW:
1513 case XFRM_POLICY_BLOCK:
1520 switch (p->sel.family) {
1522 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
1528 #if IS_ENABLED(CONFIG_IPV6)
1529 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
1534 return -EAFNOSUPPORT;
1541 ret = verify_policy_dir(p->dir);
1544 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
1550 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1552 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1553 struct xfrm_user_sec_ctx *uctx;
1558 uctx = nla_data(rt);
1559 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1562 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1568 for (i = 0; i < nr; i++, ut++) {
1569 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1571 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1572 memcpy(&t->saddr, &ut->saddr,
1573 sizeof(xfrm_address_t));
1574 t->reqid = ut->reqid;
1576 t->share = ut->share;
1577 t->optional = ut->optional;
1578 t->aalgos = ut->aalgos;
1579 t->ealgos = ut->ealgos;
1580 t->calgos = ut->calgos;
1581 /* If all masks are ~0, then we allow all algorithms. */
1582 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1583 t->encap_family = ut->family;
1587 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1592 if (nr > XFRM_MAX_DEPTH)
1595 prev_family = family;
1597 for (i = 0; i < nr; i++) {
1598 /* We never validated the ut->family value, so many
1599 * applications simply leave it at zero. The check was
1600 * never made and ut->family was ignored because all
1601 * templates could be assumed to have the same family as
1602 * the policy itself. Now that we will have ipv4-in-ipv6
1603 * and ipv6-in-ipv4 tunnels, this is no longer true.
1606 ut[i].family = family;
1608 switch (ut[i].mode) {
1609 case XFRM_MODE_TUNNEL:
1610 case XFRM_MODE_BEET:
1613 if (ut[i].family != prev_family)
1617 if (ut[i].mode >= XFRM_MODE_MAX)
1620 prev_family = ut[i].family;
1622 switch (ut[i].family) {
1625 #if IS_ENABLED(CONFIG_IPV6)
1633 if (!xfrm_id_proto_valid(ut[i].id.proto))
1640 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1642 struct nlattr *rt = attrs[XFRMA_TMPL];
1647 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1648 int nr = nla_len(rt) / sizeof(*utmpl);
1651 err = validate_tmpl(nr, utmpl, pol->family);
1655 copy_templates(pol, utmpl, nr);
1660 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1662 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1663 struct xfrm_userpolicy_type *upt;
1664 u8 type = XFRM_POLICY_TYPE_MAIN;
1672 err = verify_policy_type(type);
1680 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1682 xp->priority = p->priority;
1683 xp->index = p->index;
1684 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1685 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1686 xp->action = p->action;
1687 xp->flags = p->flags;
1688 xp->family = p->sel.family;
1689 /* XXX xp->share = p->share; */
1692 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1694 memset(p, 0, sizeof(*p));
1695 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1696 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1697 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1698 p->priority = xp->priority;
1699 p->index = xp->index;
1700 p->sel.family = xp->family;
1702 p->action = xp->action;
1703 p->flags = xp->flags;
1704 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1707 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1709 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1717 copy_from_user_policy(xp, p);
1719 err = copy_from_user_policy_type(&xp->type, attrs);
1723 if (!(err = copy_from_user_tmpl(xp, attrs)))
1724 err = copy_from_user_sec_ctx(xp, attrs);
1728 xfrm_mark_get(attrs, &xp->mark);
1730 if (attrs[XFRMA_IF_ID])
1731 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1737 xfrm_policy_destroy(xp);
1741 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1742 struct nlattr **attrs)
1744 struct net *net = sock_net(skb->sk);
1745 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1746 struct xfrm_policy *xp;
1751 err = verify_newpolicy_info(p);
1754 err = verify_sec_ctx_len(attrs);
1758 xp = xfrm_policy_construct(net, p, attrs, &err);
1762 /* shouldn't excl be based on nlh flags??
1763 * Aha! this is anti-netlink really i.e more pfkey derived
1764 * in netlink excl is a flag and you wouldn't need
1765 * a type XFRM_MSG_UPDPOLICY - JHS */
1766 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1767 err = xfrm_policy_insert(p->dir, xp, excl);
1768 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1771 security_xfrm_policy_free(xp->security);
1776 c.event = nlh->nlmsg_type;
1777 c.seq = nlh->nlmsg_seq;
1778 c.portid = nlh->nlmsg_pid;
1779 km_policy_notify(xp, p->dir, &c);
1786 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1788 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1791 if (xp->xfrm_nr == 0)
1794 for (i = 0; i < xp->xfrm_nr; i++) {
1795 struct xfrm_user_tmpl *up = &vec[i];
1796 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1798 memset(up, 0, sizeof(*up));
1799 memcpy(&up->id, &kp->id, sizeof(up->id));
1800 up->family = kp->encap_family;
1801 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1802 up->reqid = kp->reqid;
1803 up->mode = kp->mode;
1804 up->share = kp->share;
1805 up->optional = kp->optional;
1806 up->aalgos = kp->aalgos;
1807 up->ealgos = kp->ealgos;
1808 up->calgos = kp->calgos;
1811 return nla_put(skb, XFRMA_TMPL,
1812 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1815 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1818 return copy_sec_ctx(x->security, skb);
1823 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1826 return copy_sec_ctx(xp->security, skb);
1829 static inline unsigned int userpolicy_type_attrsize(void)
1831 #ifdef CONFIG_XFRM_SUB_POLICY
1832 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1838 #ifdef CONFIG_XFRM_SUB_POLICY
1839 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1841 struct xfrm_userpolicy_type upt;
1843 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1844 memset(&upt, 0, sizeof(upt));
1847 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1851 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1857 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1859 struct xfrm_dump_info *sp = ptr;
1860 struct xfrm_userpolicy_info *p;
1861 struct sk_buff *in_skb = sp->in_skb;
1862 struct sk_buff *skb = sp->out_skb;
1863 struct xfrm_translator *xtr;
1864 struct nlmsghdr *nlh;
1867 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1868 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1872 p = nlmsg_data(nlh);
1873 copy_to_user_policy(xp, p, dir);
1874 err = copy_to_user_tmpl(xp, skb);
1876 err = copy_to_user_sec_ctx(xp, skb);
1878 err = copy_to_user_policy_type(xp->type, skb);
1880 err = xfrm_mark_put(skb, &xp->mark);
1882 err = xfrm_if_id_put(skb, xp->if_id);
1884 nlmsg_cancel(skb, nlh);
1887 nlmsg_end(skb, nlh);
1889 xtr = xfrm_get_translator();
1891 err = xtr->alloc_compat(skb, nlh);
1893 xfrm_put_translator(xtr);
1895 nlmsg_cancel(skb, nlh);
1903 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1905 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1906 struct net *net = sock_net(cb->skb->sk);
1908 xfrm_policy_walk_done(walk, net);
1912 static int xfrm_dump_policy_start(struct netlink_callback *cb)
1914 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1916 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1918 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1922 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1924 struct net *net = sock_net(skb->sk);
1925 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1926 struct xfrm_dump_info info;
1928 info.in_skb = cb->skb;
1930 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1931 info.nlmsg_flags = NLM_F_MULTI;
1933 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1938 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1939 struct xfrm_policy *xp,
1942 struct xfrm_dump_info info;
1943 struct sk_buff *skb;
1946 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1948 return ERR_PTR(-ENOMEM);
1950 info.in_skb = in_skb;
1952 info.nlmsg_seq = seq;
1953 info.nlmsg_flags = 0;
1955 err = dump_one_policy(xp, dir, 0, &info);
1958 return ERR_PTR(err);
1964 static int xfrm_notify_userpolicy(struct net *net)
1966 struct xfrm_userpolicy_default *up;
1967 int len = NLMSG_ALIGN(sizeof(*up));
1968 struct nlmsghdr *nlh;
1969 struct sk_buff *skb;
1972 skb = nlmsg_new(len, GFP_ATOMIC);
1976 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0);
1982 up = nlmsg_data(nlh);
1983 up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
1984 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
1985 up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
1986 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
1987 up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
1988 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
1990 nlmsg_end(skb, nlh);
1993 err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
1999 static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2000 struct nlattr **attrs)
2002 struct net *net = sock_net(skb->sk);
2003 struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
2005 if (up->in == XFRM_USERPOLICY_BLOCK)
2006 net->xfrm.policy_default |= XFRM_POL_DEFAULT_IN;
2007 else if (up->in == XFRM_USERPOLICY_ACCEPT)
2008 net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_IN;
2010 if (up->fwd == XFRM_USERPOLICY_BLOCK)
2011 net->xfrm.policy_default |= XFRM_POL_DEFAULT_FWD;
2012 else if (up->fwd == XFRM_USERPOLICY_ACCEPT)
2013 net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_FWD;
2015 if (up->out == XFRM_USERPOLICY_BLOCK)
2016 net->xfrm.policy_default |= XFRM_POL_DEFAULT_OUT;
2017 else if (up->out == XFRM_USERPOLICY_ACCEPT)
2018 net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_OUT;
2020 rt_genid_bump_all(net);
2022 xfrm_notify_userpolicy(net);
2026 static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2027 struct nlattr **attrs)
2029 struct sk_buff *r_skb;
2030 struct nlmsghdr *r_nlh;
2031 struct net *net = sock_net(skb->sk);
2032 struct xfrm_userpolicy_default *r_up;
2033 int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default));
2034 u32 portid = NETLINK_CB(skb).portid;
2035 u32 seq = nlh->nlmsg_seq;
2037 r_skb = nlmsg_new(len, GFP_ATOMIC);
2041 r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0);
2047 r_up = nlmsg_data(r_nlh);
2049 r_up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
2050 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
2051 r_up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
2052 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
2053 r_up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
2054 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
2055 nlmsg_end(r_skb, r_nlh);
2057 return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid);
2060 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2061 struct nlattr **attrs)
2063 struct net *net = sock_net(skb->sk);
2064 struct xfrm_policy *xp;
2065 struct xfrm_userpolicy_id *p;
2066 u8 type = XFRM_POLICY_TYPE_MAIN;
2073 p = nlmsg_data(nlh);
2074 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
2076 err = copy_from_user_policy_type(&type, attrs);
2080 err = verify_policy_dir(p->dir);
2084 if (attrs[XFRMA_IF_ID])
2085 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2087 xfrm_mark_get(attrs, &m);
2090 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir,
2091 p->index, delete, &err);
2093 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2094 struct xfrm_sec_ctx *ctx;
2096 err = verify_sec_ctx_len(attrs);
2102 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2104 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2108 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2109 &p->sel, ctx, delete, &err);
2110 security_xfrm_policy_free(ctx);
2116 struct sk_buff *resp_skb;
2118 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
2119 if (IS_ERR(resp_skb)) {
2120 err = PTR_ERR(resp_skb);
2122 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
2123 NETLINK_CB(skb).portid);
2126 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2131 c.data.byid = p->index;
2132 c.event = nlh->nlmsg_type;
2133 c.seq = nlh->nlmsg_seq;
2134 c.portid = nlh->nlmsg_pid;
2135 km_policy_notify(xp, p->dir, &c);
2143 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
2144 struct nlattr **attrs)
2146 struct net *net = sock_net(skb->sk);
2148 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
2151 err = xfrm_state_flush(net, p->proto, true, false);
2153 if (err == -ESRCH) /* empty table */
2157 c.data.proto = p->proto;
2158 c.event = nlh->nlmsg_type;
2159 c.seq = nlh->nlmsg_seq;
2160 c.portid = nlh->nlmsg_pid;
2162 km_state_notify(NULL, &c);
2167 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
2169 unsigned int replay_size = x->replay_esn ?
2170 xfrm_replay_state_esn_len(x->replay_esn) :
2171 sizeof(struct xfrm_replay_state);
2173 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
2174 + nla_total_size(replay_size)
2175 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
2176 + nla_total_size(sizeof(struct xfrm_mark))
2177 + nla_total_size(4) /* XFRM_AE_RTHR */
2178 + nla_total_size(4); /* XFRM_AE_ETHR */
2181 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2183 struct xfrm_aevent_id *id;
2184 struct nlmsghdr *nlh;
2187 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
2191 id = nlmsg_data(nlh);
2192 memset(&id->sa_id, 0, sizeof(id->sa_id));
2193 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
2194 id->sa_id.spi = x->id.spi;
2195 id->sa_id.family = x->props.family;
2196 id->sa_id.proto = x->id.proto;
2197 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2198 id->reqid = x->props.reqid;
2199 id->flags = c->data.aevent;
2201 if (x->replay_esn) {
2202 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
2203 xfrm_replay_state_esn_len(x->replay_esn),
2206 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
2211 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2216 if (id->flags & XFRM_AE_RTHR) {
2217 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2221 if (id->flags & XFRM_AE_ETHR) {
2222 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2223 x->replay_maxage * 10 / HZ);
2227 err = xfrm_mark_put(skb, &x->mark);
2231 err = xfrm_if_id_put(skb, x->if_id);
2235 nlmsg_end(skb, nlh);
2239 nlmsg_cancel(skb, nlh);
2243 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2244 struct nlattr **attrs)
2246 struct net *net = sock_net(skb->sk);
2247 struct xfrm_state *x;
2248 struct sk_buff *r_skb;
2253 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2254 struct xfrm_usersa_id *id = &p->sa_id;
2256 mark = xfrm_mark_get(attrs, &m);
2258 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2262 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2263 if (r_skb == NULL) {
2269 * XXX: is this lock really needed - none of the other
2270 * gets lock (the concern is things getting updated
2271 * while we are still reading) - jhs
2273 spin_lock_bh(&x->lock);
2274 c.data.aevent = p->flags;
2275 c.seq = nlh->nlmsg_seq;
2276 c.portid = nlh->nlmsg_pid;
2278 err = build_aevent(r_skb, x, &c);
2281 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2282 spin_unlock_bh(&x->lock);
2287 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2288 struct nlattr **attrs)
2290 struct net *net = sock_net(skb->sk);
2291 struct xfrm_state *x;
2296 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2297 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2298 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2299 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2300 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2301 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2303 if (!lt && !rp && !re && !et && !rt)
2306 /* pedantic mode - thou shalt sayeth replaceth */
2307 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2310 mark = xfrm_mark_get(attrs, &m);
2312 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2316 if (x->km.state != XFRM_STATE_VALID)
2319 err = xfrm_replay_verify_len(x->replay_esn, re);
2323 spin_lock_bh(&x->lock);
2324 xfrm_update_ae_params(x, attrs, 1);
2325 spin_unlock_bh(&x->lock);
2327 c.event = nlh->nlmsg_type;
2328 c.seq = nlh->nlmsg_seq;
2329 c.portid = nlh->nlmsg_pid;
2330 c.data.aevent = XFRM_AE_CU;
2331 km_state_notify(x, &c);
2338 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2339 struct nlattr **attrs)
2341 struct net *net = sock_net(skb->sk);
2343 u8 type = XFRM_POLICY_TYPE_MAIN;
2346 err = copy_from_user_policy_type(&type, attrs);
2350 err = xfrm_policy_flush(net, type, true);
2352 if (err == -ESRCH) /* empty table */
2358 c.event = nlh->nlmsg_type;
2359 c.seq = nlh->nlmsg_seq;
2360 c.portid = nlh->nlmsg_pid;
2362 km_policy_notify(NULL, 0, &c);
2366 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2367 struct nlattr **attrs)
2369 struct net *net = sock_net(skb->sk);
2370 struct xfrm_policy *xp;
2371 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2372 struct xfrm_userpolicy_info *p = &up->pol;
2373 u8 type = XFRM_POLICY_TYPE_MAIN;
2378 err = copy_from_user_policy_type(&type, attrs);
2382 err = verify_policy_dir(p->dir);
2386 if (attrs[XFRMA_IF_ID])
2387 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2389 xfrm_mark_get(attrs, &m);
2392 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index,
2395 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2396 struct xfrm_sec_ctx *ctx;
2398 err = verify_sec_ctx_len(attrs);
2404 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2406 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2410 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2411 &p->sel, ctx, 0, &err);
2412 security_xfrm_policy_free(ctx);
2417 if (unlikely(xp->walk.dead))
2422 xfrm_policy_delete(xp, p->dir);
2423 xfrm_audit_policy_delete(xp, 1, true);
2425 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2432 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2433 struct nlattr **attrs)
2435 struct net *net = sock_net(skb->sk);
2436 struct xfrm_state *x;
2438 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2439 struct xfrm_usersa_info *p = &ue->state;
2441 u32 mark = xfrm_mark_get(attrs, &m);
2443 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2449 spin_lock_bh(&x->lock);
2451 if (x->km.state != XFRM_STATE_VALID)
2453 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2456 __xfrm_state_delete(x);
2457 xfrm_audit_state_delete(x, 1, true);
2461 spin_unlock_bh(&x->lock);
2466 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2467 struct nlattr **attrs)
2469 struct net *net = sock_net(skb->sk);
2470 struct xfrm_policy *xp;
2471 struct xfrm_user_tmpl *ut;
2473 struct nlattr *rt = attrs[XFRMA_TMPL];
2474 struct xfrm_mark mark;
2476 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2477 struct xfrm_state *x = xfrm_state_alloc(net);
2483 xfrm_mark_get(attrs, &mark);
2485 err = verify_newpolicy_info(&ua->policy);
2488 err = verify_sec_ctx_len(attrs);
2493 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2497 memcpy(&x->id, &ua->id, sizeof(ua->id));
2498 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2499 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2500 xp->mark.m = x->mark.m = mark.m;
2501 xp->mark.v = x->mark.v = mark.v;
2503 /* extract the templates and for each call km_key */
2504 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2505 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2506 memcpy(&x->id, &t->id, sizeof(x->id));
2507 x->props.mode = t->mode;
2508 x->props.reqid = t->reqid;
2509 x->props.family = ut->family;
2510 t->aalgos = ua->aalgos;
2511 t->ealgos = ua->ealgos;
2512 t->calgos = ua->calgos;
2513 err = km_query(x, t, xp);
2528 #ifdef CONFIG_XFRM_MIGRATE
2529 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2530 struct xfrm_kmaddress *k,
2531 struct nlattr **attrs, int *num)
2533 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2534 struct xfrm_user_migrate *um;
2538 struct xfrm_user_kmaddress *uk;
2540 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2541 memcpy(&k->local, &uk->local, sizeof(k->local));
2542 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2543 k->family = uk->family;
2544 k->reserved = uk->reserved;
2548 num_migrate = nla_len(rt) / sizeof(*um);
2550 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2553 for (i = 0; i < num_migrate; i++, um++, ma++) {
2554 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2555 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2556 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2557 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2559 ma->proto = um->proto;
2560 ma->mode = um->mode;
2561 ma->reqid = um->reqid;
2563 ma->old_family = um->old_family;
2564 ma->new_family = um->new_family;
2571 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2572 struct nlattr **attrs)
2574 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2575 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2576 struct xfrm_kmaddress km, *kmp;
2580 struct net *net = sock_net(skb->sk);
2581 struct xfrm_encap_tmpl *encap = NULL;
2583 if (attrs[XFRMA_MIGRATE] == NULL)
2586 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2588 err = copy_from_user_policy_type(&type, attrs);
2592 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2599 if (attrs[XFRMA_ENCAP]) {
2600 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2601 sizeof(*encap), GFP_KERNEL);
2606 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2613 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2614 struct nlattr **attrs)
2616 return -ENOPROTOOPT;
2620 #ifdef CONFIG_XFRM_MIGRATE
2621 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2623 struct xfrm_user_migrate um;
2625 memset(&um, 0, sizeof(um));
2626 um.proto = m->proto;
2628 um.reqid = m->reqid;
2629 um.old_family = m->old_family;
2630 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2631 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2632 um.new_family = m->new_family;
2633 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2634 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2636 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2639 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2641 struct xfrm_user_kmaddress uk;
2643 memset(&uk, 0, sizeof(uk));
2644 uk.family = k->family;
2645 uk.reserved = k->reserved;
2646 memcpy(&uk.local, &k->local, sizeof(uk.local));
2647 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2649 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2652 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2655 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2656 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2657 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2658 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2659 + userpolicy_type_attrsize();
2662 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2663 int num_migrate, const struct xfrm_kmaddress *k,
2664 const struct xfrm_selector *sel,
2665 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2667 const struct xfrm_migrate *mp;
2668 struct xfrm_userpolicy_id *pol_id;
2669 struct nlmsghdr *nlh;
2672 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2676 pol_id = nlmsg_data(nlh);
2677 /* copy data from selector, dir, and type to the pol_id */
2678 memset(pol_id, 0, sizeof(*pol_id));
2679 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2683 err = copy_to_user_kmaddress(k, skb);
2688 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2692 err = copy_to_user_policy_type(type, skb);
2695 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2696 err = copy_to_user_migrate(mp, skb);
2701 nlmsg_end(skb, nlh);
2705 nlmsg_cancel(skb, nlh);
2709 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2710 const struct xfrm_migrate *m, int num_migrate,
2711 const struct xfrm_kmaddress *k,
2712 const struct xfrm_encap_tmpl *encap)
2714 struct net *net = &init_net;
2715 struct sk_buff *skb;
2718 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2724 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2727 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2730 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2731 const struct xfrm_migrate *m, int num_migrate,
2732 const struct xfrm_kmaddress *k,
2733 const struct xfrm_encap_tmpl *encap)
2735 return -ENOPROTOOPT;
2739 #define XMSGSIZE(type) sizeof(struct type)
2741 const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2742 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2743 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2744 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2745 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2746 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2747 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2748 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2749 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2750 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2751 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2752 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2753 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2754 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2755 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2756 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2757 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2758 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2759 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2760 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2761 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2762 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2763 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
2764 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
2766 EXPORT_SYMBOL_GPL(xfrm_msg_min);
2770 const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2771 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2772 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2773 [XFRMA_LASTUSED] = { .type = NLA_U64},
2774 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2775 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2776 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2777 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2778 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2779 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2780 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2781 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2782 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2783 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2784 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2785 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2786 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2787 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2788 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2789 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2790 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2791 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2792 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2793 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2794 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2795 [XFRMA_PROTO] = { .type = NLA_U8 },
2796 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2797 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2798 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2799 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2800 [XFRMA_IF_ID] = { .type = NLA_U32 },
2802 EXPORT_SYMBOL_GPL(xfrma_policy);
2804 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2805 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2806 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2809 static const struct xfrm_link {
2810 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2811 int (*start)(struct netlink_callback *);
2812 int (*dump)(struct sk_buff *, struct netlink_callback *);
2813 int (*done)(struct netlink_callback *);
2814 const struct nla_policy *nla_pol;
2816 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2817 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2818 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2819 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2820 .dump = xfrm_dump_sa,
2821 .done = xfrm_dump_sa_done },
2822 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2823 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2824 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2825 .start = xfrm_dump_policy_start,
2826 .dump = xfrm_dump_policy,
2827 .done = xfrm_dump_policy_done },
2828 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2829 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2830 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2831 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2832 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2833 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2834 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2835 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2836 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2837 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2838 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2839 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2840 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2841 .nla_pol = xfrma_spd_policy,
2842 .nla_max = XFRMA_SPD_MAX },
2843 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2844 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default },
2845 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default },
2848 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2849 struct netlink_ext_ack *extack)
2851 struct net *net = sock_net(skb->sk);
2852 struct nlattr *attrs[XFRMA_MAX+1];
2853 const struct xfrm_link *link;
2854 struct nlmsghdr *nlh64 = NULL;
2857 type = nlh->nlmsg_type;
2858 if (type > XFRM_MSG_MAX)
2861 type -= XFRM_MSG_BASE;
2862 link = &xfrm_dispatch[type];
2864 /* All operations require privileges, even GET */
2865 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
2868 if (in_compat_syscall()) {
2869 struct xfrm_translator *xtr = xfrm_get_translator();
2874 nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max,
2875 link->nla_pol, extack);
2876 xfrm_put_translator(xtr);
2878 return PTR_ERR(nlh64);
2883 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2884 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2885 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2886 struct netlink_dump_control c = {
2887 .start = link->start,
2892 if (link->dump == NULL) {
2897 err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2901 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2902 link->nla_max ? : XFRMA_MAX,
2903 link->nla_pol ? : xfrma_policy, extack);
2907 if (link->doit == NULL) {
2912 err = link->doit(skb, nlh, attrs);
2914 /* We need to free skb allocated in xfrm_alloc_compat() before
2915 * returning from this function, because consume_skb() won't take
2916 * care of frag_list since netlink destructor sets
2917 * sbk->head to NULL. (see netlink_skb_destructor())
2919 if (skb_has_frag_list(skb)) {
2920 kfree_skb(skb_shinfo(skb)->frag_list);
2921 skb_shinfo(skb)->frag_list = NULL;
2929 static void xfrm_netlink_rcv(struct sk_buff *skb)
2931 struct net *net = sock_net(skb->sk);
2933 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2934 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2935 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2938 static inline unsigned int xfrm_expire_msgsize(void)
2940 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2941 + nla_total_size(sizeof(struct xfrm_mark));
2944 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2946 struct xfrm_user_expire *ue;
2947 struct nlmsghdr *nlh;
2950 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2954 ue = nlmsg_data(nlh);
2955 copy_to_user_state(x, &ue->state);
2956 ue->hard = (c->data.hard != 0) ? 1 : 0;
2957 /* clear the padding bytes */
2958 memset_after(ue, 0, hard);
2960 err = xfrm_mark_put(skb, &x->mark);
2964 err = xfrm_if_id_put(skb, x->if_id);
2968 nlmsg_end(skb, nlh);
2972 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2974 struct net *net = xs_net(x);
2975 struct sk_buff *skb;
2977 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2981 if (build_expire(skb, x, c) < 0) {
2986 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
2989 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2991 struct net *net = xs_net(x);
2992 struct sk_buff *skb;
2995 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2999 err = build_aevent(skb, x, c);
3002 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
3005 static int xfrm_notify_sa_flush(const struct km_event *c)
3007 struct net *net = c->net;
3008 struct xfrm_usersa_flush *p;
3009 struct nlmsghdr *nlh;
3010 struct sk_buff *skb;
3011 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
3013 skb = nlmsg_new(len, GFP_ATOMIC);
3017 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
3023 p = nlmsg_data(nlh);
3024 p->proto = c->data.proto;
3026 nlmsg_end(skb, nlh);
3028 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3031 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
3035 l += nla_total_size(aead_len(x->aead));
3037 l += nla_total_size(sizeof(struct xfrm_algo) +
3038 (x->aalg->alg_key_len + 7) / 8);
3039 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
3042 l += nla_total_size(xfrm_alg_len(x->ealg));
3044 l += nla_total_size(sizeof(*x->calg));
3046 l += nla_total_size(sizeof(*x->encap));
3048 l += nla_total_size(sizeof(x->tfcpad));
3050 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
3052 l += nla_total_size(sizeof(struct xfrm_replay_state));
3054 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
3055 x->security->ctx_len);
3057 l += nla_total_size(sizeof(*x->coaddr));
3058 if (x->props.extra_flags)
3059 l += nla_total_size(sizeof(x->props.extra_flags));
3061 l += nla_total_size(sizeof(x->xso));
3062 if (x->props.smark.v | x->props.smark.m) {
3063 l += nla_total_size(sizeof(x->props.smark.v));
3064 l += nla_total_size(sizeof(x->props.smark.m));
3067 l += nla_total_size(sizeof(x->if_id));
3069 /* Must count x->lastused as it may become non-zero behind our back. */
3070 l += nla_total_size_64bit(sizeof(u64));
3075 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
3077 struct net *net = xs_net(x);
3078 struct xfrm_usersa_info *p;
3079 struct xfrm_usersa_id *id;
3080 struct nlmsghdr *nlh;
3081 struct sk_buff *skb;
3082 unsigned int len = xfrm_sa_len(x);
3083 unsigned int headlen;
3086 headlen = sizeof(*p);
3087 if (c->event == XFRM_MSG_DELSA) {
3088 len += nla_total_size(headlen);
3089 headlen = sizeof(*id);
3090 len += nla_total_size(sizeof(struct xfrm_mark));
3092 len += NLMSG_ALIGN(headlen);
3094 skb = nlmsg_new(len, GFP_ATOMIC);
3098 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3103 p = nlmsg_data(nlh);
3104 if (c->event == XFRM_MSG_DELSA) {
3105 struct nlattr *attr;
3107 id = nlmsg_data(nlh);
3108 memset(id, 0, sizeof(*id));
3109 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
3110 id->spi = x->id.spi;
3111 id->family = x->props.family;
3112 id->proto = x->id.proto;
3114 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
3121 err = copy_to_user_state_extra(x, p, skb);
3125 nlmsg_end(skb, nlh);
3127 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3134 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
3138 case XFRM_MSG_EXPIRE:
3139 return xfrm_exp_state_notify(x, c);
3140 case XFRM_MSG_NEWAE:
3141 return xfrm_aevent_state_notify(x, c);
3142 case XFRM_MSG_DELSA:
3143 case XFRM_MSG_UPDSA:
3144 case XFRM_MSG_NEWSA:
3145 return xfrm_notify_sa(x, c);
3146 case XFRM_MSG_FLUSHSA:
3147 return xfrm_notify_sa_flush(c);
3149 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
3158 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
3159 struct xfrm_policy *xp)
3161 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
3162 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3163 + nla_total_size(sizeof(struct xfrm_mark))
3164 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
3165 + userpolicy_type_attrsize();
3168 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
3169 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
3171 __u32 seq = xfrm_get_acqseq();
3172 struct xfrm_user_acquire *ua;
3173 struct nlmsghdr *nlh;
3176 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
3180 ua = nlmsg_data(nlh);
3181 memcpy(&ua->id, &x->id, sizeof(ua->id));
3182 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
3183 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
3184 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
3185 ua->aalgos = xt->aalgos;
3186 ua->ealgos = xt->ealgos;
3187 ua->calgos = xt->calgos;
3188 ua->seq = x->km.seq = seq;
3190 err = copy_to_user_tmpl(xp, skb);
3192 err = copy_to_user_state_sec_ctx(x, skb);
3194 err = copy_to_user_policy_type(xp->type, skb);
3196 err = xfrm_mark_put(skb, &xp->mark);
3198 err = xfrm_if_id_put(skb, xp->if_id);
3200 nlmsg_cancel(skb, nlh);
3204 nlmsg_end(skb, nlh);
3208 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
3209 struct xfrm_policy *xp)
3211 struct net *net = xs_net(x);
3212 struct sk_buff *skb;
3215 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
3219 err = build_acquire(skb, x, xt, xp);
3222 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
3225 /* User gives us xfrm_user_policy_info followed by an array of 0
3226 * or more templates.
3228 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
3229 u8 *data, int len, int *dir)
3231 struct net *net = sock_net(sk);
3232 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
3233 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
3234 struct xfrm_policy *xp;
3237 switch (sk->sk_family) {
3239 if (opt != IP_XFRM_POLICY) {
3244 #if IS_ENABLED(CONFIG_IPV6)
3246 if (opt != IPV6_XFRM_POLICY) {
3259 if (len < sizeof(*p) ||
3260 verify_newpolicy_info(p))
3263 nr = ((len - sizeof(*p)) / sizeof(*ut));
3264 if (validate_tmpl(nr, ut, p->sel.family))
3267 if (p->dir > XFRM_POLICY_OUT)
3270 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3276 copy_from_user_policy(xp, p);
3277 xp->type = XFRM_POLICY_TYPE_MAIN;
3278 copy_templates(xp, ut, nr);
3285 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3287 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3288 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3289 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3290 + nla_total_size(sizeof(struct xfrm_mark))
3291 + userpolicy_type_attrsize();
3294 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3295 int dir, const struct km_event *c)
3297 struct xfrm_user_polexpire *upe;
3298 int hard = c->data.hard;
3299 struct nlmsghdr *nlh;
3302 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3306 upe = nlmsg_data(nlh);
3307 copy_to_user_policy(xp, &upe->pol, dir);
3308 err = copy_to_user_tmpl(xp, skb);
3310 err = copy_to_user_sec_ctx(xp, skb);
3312 err = copy_to_user_policy_type(xp->type, skb);
3314 err = xfrm_mark_put(skb, &xp->mark);
3316 err = xfrm_if_id_put(skb, xp->if_id);
3318 nlmsg_cancel(skb, nlh);
3323 nlmsg_end(skb, nlh);
3327 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3329 struct net *net = xp_net(xp);
3330 struct sk_buff *skb;
3333 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3337 err = build_polexpire(skb, xp, dir, c);
3340 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3343 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3345 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3346 struct net *net = xp_net(xp);
3347 struct xfrm_userpolicy_info *p;
3348 struct xfrm_userpolicy_id *id;
3349 struct nlmsghdr *nlh;
3350 struct sk_buff *skb;
3351 unsigned int headlen;
3354 headlen = sizeof(*p);
3355 if (c->event == XFRM_MSG_DELPOLICY) {
3356 len += nla_total_size(headlen);
3357 headlen = sizeof(*id);
3359 len += userpolicy_type_attrsize();
3360 len += nla_total_size(sizeof(struct xfrm_mark));
3361 len += NLMSG_ALIGN(headlen);
3363 skb = nlmsg_new(len, GFP_ATOMIC);
3367 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3372 p = nlmsg_data(nlh);
3373 if (c->event == XFRM_MSG_DELPOLICY) {
3374 struct nlattr *attr;
3376 id = nlmsg_data(nlh);
3377 memset(id, 0, sizeof(*id));
3380 id->index = xp->index;
3382 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3384 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3392 copy_to_user_policy(xp, p, dir);
3393 err = copy_to_user_tmpl(xp, skb);
3395 err = copy_to_user_policy_type(xp->type, skb);
3397 err = xfrm_mark_put(skb, &xp->mark);
3399 err = xfrm_if_id_put(skb, xp->if_id);
3403 nlmsg_end(skb, nlh);
3405 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3412 static int xfrm_notify_policy_flush(const struct km_event *c)
3414 struct net *net = c->net;
3415 struct nlmsghdr *nlh;
3416 struct sk_buff *skb;
3419 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3423 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3427 err = copy_to_user_policy_type(c->data.type, skb);
3431 nlmsg_end(skb, nlh);
3433 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3440 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3444 case XFRM_MSG_NEWPOLICY:
3445 case XFRM_MSG_UPDPOLICY:
3446 case XFRM_MSG_DELPOLICY:
3447 return xfrm_notify_policy(xp, dir, c);
3448 case XFRM_MSG_FLUSHPOLICY:
3449 return xfrm_notify_policy_flush(c);
3450 case XFRM_MSG_POLEXPIRE:
3451 return xfrm_exp_policy_notify(xp, dir, c);
3453 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3461 static inline unsigned int xfrm_report_msgsize(void)
3463 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3466 static int build_report(struct sk_buff *skb, u8 proto,
3467 struct xfrm_selector *sel, xfrm_address_t *addr)
3469 struct xfrm_user_report *ur;
3470 struct nlmsghdr *nlh;
3472 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3476 ur = nlmsg_data(nlh);
3478 memcpy(&ur->sel, sel, sizeof(ur->sel));
3481 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3483 nlmsg_cancel(skb, nlh);
3487 nlmsg_end(skb, nlh);
3491 static int xfrm_send_report(struct net *net, u8 proto,
3492 struct xfrm_selector *sel, xfrm_address_t *addr)
3494 struct sk_buff *skb;
3497 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3501 err = build_report(skb, proto, sel, addr);
3504 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3507 static inline unsigned int xfrm_mapping_msgsize(void)
3509 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3512 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3513 xfrm_address_t *new_saddr, __be16 new_sport)
3515 struct xfrm_user_mapping *um;
3516 struct nlmsghdr *nlh;
3518 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3522 um = nlmsg_data(nlh);
3524 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3525 um->id.spi = x->id.spi;
3526 um->id.family = x->props.family;
3527 um->id.proto = x->id.proto;
3528 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3529 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3530 um->new_sport = new_sport;
3531 um->old_sport = x->encap->encap_sport;
3532 um->reqid = x->props.reqid;
3534 nlmsg_end(skb, nlh);
3538 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3541 struct net *net = xs_net(x);
3542 struct sk_buff *skb;
3545 if (x->id.proto != IPPROTO_ESP)
3551 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3555 err = build_mapping(skb, x, ipaddr, sport);
3558 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3561 static bool xfrm_is_alive(const struct km_event *c)
3563 return (bool)xfrm_acquire_is_on(c->net);
3566 static struct xfrm_mgr netlink_mgr = {
3567 .notify = xfrm_send_state_notify,
3568 .acquire = xfrm_send_acquire,
3569 .compile_policy = xfrm_compile_policy,
3570 .notify_policy = xfrm_send_policy_notify,
3571 .report = xfrm_send_report,
3572 .migrate = xfrm_send_migrate,
3573 .new_mapping = xfrm_send_mapping,
3574 .is_alive = xfrm_is_alive,
3577 static int __net_init xfrm_user_net_init(struct net *net)
3580 struct netlink_kernel_cfg cfg = {
3581 .groups = XFRMNLGRP_MAX,
3582 .input = xfrm_netlink_rcv,
3585 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3588 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3589 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3593 static void __net_exit xfrm_user_net_pre_exit(struct net *net)
3595 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3598 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3602 list_for_each_entry(net, net_exit_list, exit_list)
3603 netlink_kernel_release(net->xfrm.nlsk_stash);
3606 static struct pernet_operations xfrm_user_net_ops = {
3607 .init = xfrm_user_net_init,
3608 .pre_exit = xfrm_user_net_pre_exit,
3609 .exit_batch = xfrm_user_net_exit,
3612 static int __init xfrm_user_init(void)
3616 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3618 rv = register_pernet_subsys(&xfrm_user_net_ops);
3621 rv = xfrm_register_km(&netlink_mgr);
3623 unregister_pernet_subsys(&xfrm_user_net_ops);
3627 static void __exit xfrm_user_exit(void)
3629 xfrm_unregister_km(&netlink_mgr);
3630 unregister_pernet_subsys(&xfrm_user_net_ops);
3633 module_init(xfrm_user_init);
3634 module_exit(xfrm_user_exit);
3635 MODULE_LICENSE("GPL");
3636 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);