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/compat.h>
15 #include <linux/crypto.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/slab.h>
20 #include <linux/socket.h>
21 #include <linux/string.h>
22 #include <linux/net.h>
23 #include <linux/skbuff.h>
24 #include <linux/pfkeyv2.h>
25 #include <linux/ipsec.h>
26 #include <linux/init.h>
27 #include <linux/security.h>
30 #include <net/netlink.h>
32 #include <linux/uaccess.h>
33 #if IS_ENABLED(CONFIG_IPV6)
34 #include <linux/in6.h>
36 #include <asm/unaligned.h>
38 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type,
39 struct netlink_ext_ack *extack)
41 struct nlattr *rt = attrs[type];
42 struct xfrm_algo *algp;
48 if (nla_len(rt) < (int)xfrm_alg_len(algp)) {
49 NL_SET_ERR_MSG(extack, "Invalid AUTH/CRYPT/COMP attribute length");
60 NL_SET_ERR_MSG(extack, "Invalid algorithm attribute type");
64 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
68 static int verify_auth_trunc(struct nlattr **attrs,
69 struct netlink_ext_ack *extack)
71 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
72 struct xfrm_algo_auth *algp;
78 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) {
79 NL_SET_ERR_MSG(extack, "Invalid AUTH_TRUNC attribute length");
83 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
87 static int verify_aead(struct nlattr **attrs, struct netlink_ext_ack *extack)
89 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
90 struct xfrm_algo_aead *algp;
96 if (nla_len(rt) < (int)aead_len(algp)) {
97 NL_SET_ERR_MSG(extack, "Invalid AEAD attribute length");
101 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
105 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
106 xfrm_address_t **addrp)
108 struct nlattr *rt = attrs[type];
111 *addrp = nla_data(rt);
114 static inline int verify_sec_ctx_len(struct nlattr **attrs, struct netlink_ext_ack *extack)
116 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
117 struct xfrm_user_sec_ctx *uctx;
123 if (uctx->len > nla_len(rt) ||
124 uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) {
125 NL_SET_ERR_MSG(extack, "Invalid security context length");
132 static inline int verify_replay(struct xfrm_usersa_info *p,
133 struct nlattr **attrs,
134 struct netlink_ext_ack *extack)
136 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
137 struct xfrm_replay_state_esn *rs;
140 if (p->flags & XFRM_STATE_ESN) {
141 NL_SET_ERR_MSG(extack, "Missing required attribute for ESN");
149 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) {
150 NL_SET_ERR_MSG(extack, "ESN bitmap length must be <= 128");
154 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
155 nla_len(rt) != sizeof(*rs)) {
156 NL_SET_ERR_MSG(extack, "ESN attribute is too short to fit the full bitmap length");
160 /* As only ESP and AH support ESN feature. */
161 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) {
162 NL_SET_ERR_MSG(extack, "ESN only supported for ESP and AH");
166 if (p->replay_window != 0) {
167 NL_SET_ERR_MSG(extack, "ESN not compatible with legacy replay_window");
174 static int verify_newsa_info(struct xfrm_usersa_info *p,
175 struct nlattr **attrs,
176 struct netlink_ext_ack *extack)
186 #if IS_ENABLED(CONFIG_IPV6)
190 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
195 NL_SET_ERR_MSG(extack, "Invalid address family");
199 switch (p->sel.family) {
204 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
205 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
212 #if IS_ENABLED(CONFIG_IPV6)
213 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
214 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
220 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
226 NL_SET_ERR_MSG(extack, "Invalid address family in selector");
231 switch (p->id.proto) {
233 if (!attrs[XFRMA_ALG_AUTH] &&
234 !attrs[XFRMA_ALG_AUTH_TRUNC]) {
235 NL_SET_ERR_MSG(extack, "Missing required attribute for AH: AUTH_TRUNC or AUTH");
239 if (attrs[XFRMA_ALG_AEAD] ||
240 attrs[XFRMA_ALG_CRYPT] ||
241 attrs[XFRMA_ALG_COMP] ||
242 attrs[XFRMA_TFCPAD]) {
243 NL_SET_ERR_MSG(extack, "Invalid attributes for AH: AEAD, CRYPT, COMP, TFCPAD");
249 if (attrs[XFRMA_ALG_COMP]) {
250 NL_SET_ERR_MSG(extack, "Invalid attribute for ESP: COMP");
254 if (!attrs[XFRMA_ALG_AUTH] &&
255 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
256 !attrs[XFRMA_ALG_CRYPT] &&
257 !attrs[XFRMA_ALG_AEAD]) {
258 NL_SET_ERR_MSG(extack, "Missing required attribute for ESP: at least one of AUTH, AUTH_TRUNC, CRYPT, AEAD");
262 if ((attrs[XFRMA_ALG_AUTH] ||
263 attrs[XFRMA_ALG_AUTH_TRUNC] ||
264 attrs[XFRMA_ALG_CRYPT]) &&
265 attrs[XFRMA_ALG_AEAD]) {
266 NL_SET_ERR_MSG(extack, "Invalid attribute combination for ESP: AEAD can't be used with AUTH, AUTH_TRUNC, CRYPT");
270 if (attrs[XFRMA_TFCPAD] &&
271 p->mode != XFRM_MODE_TUNNEL) {
272 NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode");
278 if (!attrs[XFRMA_ALG_COMP]) {
279 NL_SET_ERR_MSG(extack, "Missing required attribute for COMP: COMP");
283 if (attrs[XFRMA_ALG_AEAD] ||
284 attrs[XFRMA_ALG_AUTH] ||
285 attrs[XFRMA_ALG_AUTH_TRUNC] ||
286 attrs[XFRMA_ALG_CRYPT] ||
287 attrs[XFRMA_TFCPAD]) {
288 NL_SET_ERR_MSG(extack, "Invalid attributes for COMP: AEAD, AUTH, AUTH_TRUNC, CRYPT, TFCPAD");
292 if (ntohl(p->id.spi) >= 0x10000) {
293 NL_SET_ERR_MSG(extack, "SPI is too large for COMP (must be < 0x10000)");
298 #if IS_ENABLED(CONFIG_IPV6)
299 case IPPROTO_DSTOPTS:
300 case IPPROTO_ROUTING:
301 if (attrs[XFRMA_ALG_COMP] ||
302 attrs[XFRMA_ALG_AUTH] ||
303 attrs[XFRMA_ALG_AUTH_TRUNC] ||
304 attrs[XFRMA_ALG_AEAD] ||
305 attrs[XFRMA_ALG_CRYPT] ||
306 attrs[XFRMA_ENCAP] ||
307 attrs[XFRMA_SEC_CTX] ||
308 attrs[XFRMA_TFCPAD]) {
309 NL_SET_ERR_MSG(extack, "Invalid attributes for DSTOPTS/ROUTING");
313 if (!attrs[XFRMA_COADDR]) {
314 NL_SET_ERR_MSG(extack, "Missing required COADDR attribute for DSTOPTS/ROUTING");
321 NL_SET_ERR_MSG(extack, "Unsupported protocol");
325 if ((err = verify_aead(attrs, extack)))
327 if ((err = verify_auth_trunc(attrs, extack)))
329 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH, extack)))
331 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT, extack)))
333 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP, extack)))
335 if ((err = verify_sec_ctx_len(attrs, extack)))
337 if ((err = verify_replay(p, attrs, extack)))
342 case XFRM_MODE_TRANSPORT:
343 case XFRM_MODE_TUNNEL:
344 case XFRM_MODE_ROUTEOPTIMIZATION:
349 NL_SET_ERR_MSG(extack, "Unsupported mode");
355 if (attrs[XFRMA_MTIMER_THRESH]) {
356 if (!attrs[XFRMA_ENCAP]) {
357 NL_SET_ERR_MSG(extack, "MTIMER_THRESH attribute can only be set on ENCAP states");
367 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
368 struct xfrm_algo_desc *(*get_byname)(const char *, int),
369 struct nlattr *rta, struct netlink_ext_ack *extack)
371 struct xfrm_algo *p, *ualg;
372 struct xfrm_algo_desc *algo;
377 ualg = nla_data(rta);
379 algo = get_byname(ualg->alg_name, 1);
381 NL_SET_ERR_MSG(extack, "Requested COMP algorithm not found");
384 *props = algo->desc.sadb_alg_id;
386 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
390 strcpy(p->alg_name, algo->name);
395 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta,
396 struct netlink_ext_ack *extack)
398 struct xfrm_algo *p, *ualg;
399 struct xfrm_algo_desc *algo;
404 ualg = nla_data(rta);
406 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
408 NL_SET_ERR_MSG(extack, "Requested CRYPT algorithm not found");
411 x->props.ealgo = algo->desc.sadb_alg_id;
413 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
417 strcpy(p->alg_name, algo->name);
419 x->geniv = algo->uinfo.encr.geniv;
423 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
424 struct nlattr *rta, struct netlink_ext_ack *extack)
426 struct xfrm_algo *ualg;
427 struct xfrm_algo_auth *p;
428 struct xfrm_algo_desc *algo;
433 ualg = nla_data(rta);
435 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
437 NL_SET_ERR_MSG(extack, "Requested AUTH algorithm not found");
440 *props = algo->desc.sadb_alg_id;
442 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
446 strcpy(p->alg_name, algo->name);
447 p->alg_key_len = ualg->alg_key_len;
448 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
449 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
455 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
456 struct nlattr *rta, struct netlink_ext_ack *extack)
458 struct xfrm_algo_auth *p, *ualg;
459 struct xfrm_algo_desc *algo;
464 ualg = nla_data(rta);
466 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
468 NL_SET_ERR_MSG(extack, "Requested AUTH_TRUNC algorithm not found");
471 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) {
472 NL_SET_ERR_MSG(extack, "Invalid length requested for truncated ICV");
475 *props = algo->desc.sadb_alg_id;
477 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
481 strcpy(p->alg_name, algo->name);
482 if (!p->alg_trunc_len)
483 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
489 static int attach_aead(struct xfrm_state *x, struct nlattr *rta,
490 struct netlink_ext_ack *extack)
492 struct xfrm_algo_aead *p, *ualg;
493 struct xfrm_algo_desc *algo;
498 ualg = nla_data(rta);
500 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
502 NL_SET_ERR_MSG(extack, "Requested AEAD algorithm not found");
505 x->props.ealgo = algo->desc.sadb_alg_id;
507 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
511 strcpy(p->alg_name, algo->name);
513 x->geniv = algo->uinfo.aead.geniv;
517 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
519 struct netlink_ext_ack *extack)
521 struct xfrm_replay_state_esn *up;
524 if (!replay_esn || !rp)
528 ulen = xfrm_replay_state_esn_len(up);
530 /* Check the overall length and the internal bitmap length to avoid
531 * potential overflow. */
532 if (nla_len(rp) < (int)ulen) {
533 NL_SET_ERR_MSG(extack, "ESN attribute is too short");
537 if (xfrm_replay_state_esn_len(replay_esn) != ulen) {
538 NL_SET_ERR_MSG(extack, "New ESN size doesn't match the existing SA's ESN size");
542 if (replay_esn->bmp_len != up->bmp_len) {
543 NL_SET_ERR_MSG(extack, "New ESN bitmap size doesn't match the existing SA's ESN bitmap");
547 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) {
548 NL_SET_ERR_MSG(extack, "ESN replay window is longer than the bitmap");
555 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
556 struct xfrm_replay_state_esn **preplay_esn,
559 struct xfrm_replay_state_esn *p, *pp, *up;
560 unsigned int klen, ulen;
566 klen = xfrm_replay_state_esn_len(up);
567 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
569 p = kzalloc(klen, GFP_KERNEL);
573 pp = kzalloc(klen, GFP_KERNEL);
580 memcpy(pp, up, ulen);
588 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
590 unsigned int len = 0;
593 len += sizeof(struct xfrm_user_sec_ctx);
594 len += xfrm_ctx->ctx_len;
599 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
601 memcpy(&x->id, &p->id, sizeof(x->id));
602 memcpy(&x->sel, &p->sel, sizeof(x->sel));
603 memcpy(&x->lft, &p->lft, sizeof(x->lft));
604 x->props.mode = p->mode;
605 x->props.replay_window = min_t(unsigned int, p->replay_window,
606 sizeof(x->replay.bitmap) * 8);
607 x->props.reqid = p->reqid;
608 x->props.family = p->family;
609 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
610 x->props.flags = p->flags;
612 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
613 x->sel.family = p->family;
617 * someday when pfkey also has support, we could have the code
618 * somehow made shareable and move it to xfrm_state.c - JHS
621 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
624 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
625 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
626 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
627 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
628 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
629 struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH];
631 if (re && x->replay_esn && x->preplay_esn) {
632 struct xfrm_replay_state_esn *replay_esn;
633 replay_esn = nla_data(re);
634 memcpy(x->replay_esn, replay_esn,
635 xfrm_replay_state_esn_len(replay_esn));
636 memcpy(x->preplay_esn, replay_esn,
637 xfrm_replay_state_esn_len(replay_esn));
641 struct xfrm_replay_state *replay;
642 replay = nla_data(rp);
643 memcpy(&x->replay, replay, sizeof(*replay));
644 memcpy(&x->preplay, replay, sizeof(*replay));
648 struct xfrm_lifetime_cur *ltime;
649 ltime = nla_data(lt);
650 x->curlft.bytes = ltime->bytes;
651 x->curlft.packets = ltime->packets;
652 x->curlft.add_time = ltime->add_time;
653 x->curlft.use_time = ltime->use_time;
657 x->replay_maxage = nla_get_u32(et);
660 x->replay_maxdiff = nla_get_u32(rt);
663 x->mapping_maxage = nla_get_u32(mt);
666 static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
668 if (attrs[XFRMA_SET_MARK]) {
669 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
670 if (attrs[XFRMA_SET_MARK_MASK])
671 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
679 static struct xfrm_state *xfrm_state_construct(struct net *net,
680 struct xfrm_usersa_info *p,
681 struct nlattr **attrs,
683 struct netlink_ext_ack *extack)
685 struct xfrm_state *x = xfrm_state_alloc(net);
691 copy_from_user_state(x, p);
693 if (attrs[XFRMA_ENCAP]) {
694 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
695 sizeof(*x->encap), GFP_KERNEL);
696 if (x->encap == NULL)
700 if (attrs[XFRMA_COADDR]) {
701 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
702 sizeof(*x->coaddr), GFP_KERNEL);
703 if (x->coaddr == NULL)
707 if (attrs[XFRMA_SA_EXTRA_FLAGS])
708 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
710 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD], extack)))
712 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
713 attrs[XFRMA_ALG_AUTH_TRUNC], extack)))
715 if (!x->props.aalgo) {
716 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
717 attrs[XFRMA_ALG_AUTH], extack)))
720 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT], extack)))
722 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
723 xfrm_calg_get_byname,
724 attrs[XFRMA_ALG_COMP], extack)))
727 if (attrs[XFRMA_TFCPAD])
728 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
730 xfrm_mark_get(attrs, &x->mark);
732 xfrm_smark_init(attrs, &x->props.smark);
734 if (attrs[XFRMA_IF_ID])
735 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
737 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV], extack);
741 if (attrs[XFRMA_SEC_CTX]) {
742 err = security_xfrm_state_alloc(x,
743 nla_data(attrs[XFRMA_SEC_CTX]));
748 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
749 attrs[XFRMA_REPLAY_ESN_VAL])))
753 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
754 /* sysctl_xfrm_aevent_etime is in 100ms units */
755 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
757 if ((err = xfrm_init_replay(x, extack)))
760 /* override default values from above */
761 xfrm_update_ae_params(x, attrs, 0);
763 /* configure the hardware if offload is requested */
764 if (attrs[XFRMA_OFFLOAD_DEV]) {
765 err = xfrm_dev_state_add(net, x,
766 nla_data(attrs[XFRMA_OFFLOAD_DEV]),
775 x->km.state = XFRM_STATE_DEAD;
782 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
783 struct nlattr **attrs, struct netlink_ext_ack *extack)
785 struct net *net = sock_net(skb->sk);
786 struct xfrm_usersa_info *p = nlmsg_data(nlh);
787 struct xfrm_state *x;
791 err = verify_newsa_info(p, attrs, extack);
795 x = xfrm_state_construct(net, p, attrs, &err, extack);
800 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
801 err = xfrm_state_add(x);
803 err = xfrm_state_update(x);
805 xfrm_audit_state_add(x, err ? 0 : 1, true);
808 x->km.state = XFRM_STATE_DEAD;
809 xfrm_dev_state_delete(x);
814 if (x->km.state == XFRM_STATE_VOID)
815 x->km.state = XFRM_STATE_VALID;
817 c.seq = nlh->nlmsg_seq;
818 c.portid = nlh->nlmsg_pid;
819 c.event = nlh->nlmsg_type;
821 km_state_notify(x, &c);
827 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
828 struct xfrm_usersa_id *p,
829 struct nlattr **attrs,
832 struct xfrm_state *x = NULL;
835 u32 mark = xfrm_mark_get(attrs, &m);
837 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
839 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
841 xfrm_address_t *saddr = NULL;
843 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
850 x = xfrm_state_lookup_byaddr(net, mark,
852 p->proto, p->family);
861 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
862 struct nlattr **attrs, struct netlink_ext_ack *extack)
864 struct net *net = sock_net(skb->sk);
865 struct xfrm_state *x;
868 struct xfrm_usersa_id *p = nlmsg_data(nlh);
870 x = xfrm_user_state_lookup(net, p, attrs, &err);
874 if ((err = security_xfrm_state_delete(x)) != 0)
877 if (xfrm_state_kern(x)) {
878 NL_SET_ERR_MSG(extack, "SA is in use by tunnels");
883 err = xfrm_state_delete(x);
887 c.seq = nlh->nlmsg_seq;
888 c.portid = nlh->nlmsg_pid;
889 c.event = nlh->nlmsg_type;
890 km_state_notify(x, &c);
893 xfrm_audit_state_delete(x, err ? 0 : 1, true);
898 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
900 memset(p, 0, sizeof(*p));
901 memcpy(&p->id, &x->id, sizeof(p->id));
902 memcpy(&p->sel, &x->sel, sizeof(p->sel));
903 memcpy(&p->lft, &x->lft, sizeof(p->lft));
905 xfrm_dev_state_update_curlft(x);
906 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
907 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
908 put_unaligned(x->stats.replay, &p->stats.replay);
909 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
910 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
911 p->mode = x->props.mode;
912 p->replay_window = x->props.replay_window;
913 p->reqid = x->props.reqid;
914 p->family = x->props.family;
915 p->flags = x->props.flags;
919 struct xfrm_dump_info {
920 struct sk_buff *in_skb;
921 struct sk_buff *out_skb;
926 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
928 struct xfrm_user_sec_ctx *uctx;
930 int ctx_size = sizeof(*uctx) + s->ctx_len;
932 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
936 uctx = nla_data(attr);
937 uctx->exttype = XFRMA_SEC_CTX;
938 uctx->len = ctx_size;
939 uctx->ctx_doi = s->ctx_doi;
940 uctx->ctx_alg = s->ctx_alg;
941 uctx->ctx_len = s->ctx_len;
942 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
947 static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
949 struct xfrm_user_offload *xuo;
952 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
956 xuo = nla_data(attr);
957 memset(xuo, 0, sizeof(*xuo));
958 xuo->ifindex = xso->dev->ifindex;
959 if (xso->dir == XFRM_DEV_OFFLOAD_IN)
960 xuo->flags = XFRM_OFFLOAD_INBOUND;
961 if (xso->type == XFRM_DEV_OFFLOAD_PACKET)
962 xuo->flags |= XFRM_OFFLOAD_PACKET;
967 static bool xfrm_redact(void)
969 return IS_ENABLED(CONFIG_SECURITY) &&
970 security_locked_down(LOCKDOWN_XFRM_SECRET);
973 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
975 struct xfrm_algo *algo;
976 struct xfrm_algo_auth *ap;
978 bool redact_secret = xfrm_redact();
980 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
981 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
984 algo = nla_data(nla);
985 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
987 if (redact_secret && auth->alg_key_len)
988 memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8);
990 memcpy(algo->alg_key, auth->alg_key,
991 (auth->alg_key_len + 7) / 8);
992 algo->alg_key_len = auth->alg_key_len;
994 nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth));
998 memcpy(ap, auth, sizeof(struct xfrm_algo_auth));
999 if (redact_secret && auth->alg_key_len)
1000 memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8);
1002 memcpy(ap->alg_key, auth->alg_key,
1003 (auth->alg_key_len + 7) / 8);
1007 static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb)
1009 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead));
1010 struct xfrm_algo_aead *ap;
1011 bool redact_secret = xfrm_redact();
1017 strscpy_pad(ap->alg_name, aead->alg_name, sizeof(ap->alg_name));
1018 ap->alg_key_len = aead->alg_key_len;
1019 ap->alg_icv_len = aead->alg_icv_len;
1021 if (redact_secret && aead->alg_key_len)
1022 memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8);
1024 memcpy(ap->alg_key, aead->alg_key,
1025 (aead->alg_key_len + 7) / 8);
1029 static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
1031 struct xfrm_algo *ap;
1032 bool redact_secret = xfrm_redact();
1033 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT,
1034 xfrm_alg_len(ealg));
1039 strscpy_pad(ap->alg_name, ealg->alg_name, sizeof(ap->alg_name));
1040 ap->alg_key_len = ealg->alg_key_len;
1042 if (redact_secret && ealg->alg_key_len)
1043 memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8);
1045 memcpy(ap->alg_key, ealg->alg_key,
1046 (ealg->alg_key_len + 7) / 8);
1051 static int copy_to_user_calg(struct xfrm_algo *calg, struct sk_buff *skb)
1053 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_COMP, sizeof(*calg));
1054 struct xfrm_algo *ap;
1060 strscpy_pad(ap->alg_name, calg->alg_name, sizeof(ap->alg_name));
1061 ap->alg_key_len = 0;
1066 static int copy_to_user_encap(struct xfrm_encap_tmpl *ep, struct sk_buff *skb)
1068 struct nlattr *nla = nla_reserve(skb, XFRMA_ENCAP, sizeof(*ep));
1069 struct xfrm_encap_tmpl *uep;
1074 uep = nla_data(nla);
1075 memset(uep, 0, sizeof(*uep));
1077 uep->encap_type = ep->encap_type;
1078 uep->encap_sport = ep->encap_sport;
1079 uep->encap_dport = ep->encap_dport;
1080 uep->encap_oa = ep->encap_oa;
1085 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
1090 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
1092 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
1097 /* Don't change this without updating xfrm_sa_len! */
1098 static int copy_to_user_state_extra(struct xfrm_state *x,
1099 struct xfrm_usersa_info *p,
1100 struct sk_buff *skb)
1104 copy_to_user_state(x, p);
1106 if (x->props.extra_flags) {
1107 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
1108 x->props.extra_flags);
1114 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
1119 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
1125 ret = copy_to_user_aead(x->aead, skb);
1130 ret = copy_to_user_auth(x->aalg, skb);
1135 ret = copy_to_user_ealg(x->ealg, skb);
1140 ret = copy_to_user_calg(x->calg, skb);
1145 ret = copy_to_user_encap(x->encap, skb);
1150 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
1154 ret = xfrm_mark_put(skb, &x->mark);
1158 ret = xfrm_smark_put(skb, &x->props.smark);
1163 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1164 xfrm_replay_state_esn_len(x->replay_esn),
1167 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1172 ret = copy_user_offload(&x->xso, skb);
1176 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
1181 ret = copy_sec_ctx(x->security, skb);
1185 if (x->mapping_maxage)
1186 ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage);
1191 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
1193 struct xfrm_dump_info *sp = ptr;
1194 struct sk_buff *in_skb = sp->in_skb;
1195 struct sk_buff *skb = sp->out_skb;
1196 struct xfrm_translator *xtr;
1197 struct xfrm_usersa_info *p;
1198 struct nlmsghdr *nlh;
1201 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1202 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
1206 p = nlmsg_data(nlh);
1208 err = copy_to_user_state_extra(x, p, skb);
1210 nlmsg_cancel(skb, nlh);
1213 nlmsg_end(skb, nlh);
1215 xtr = xfrm_get_translator();
1217 err = xtr->alloc_compat(skb, nlh);
1219 xfrm_put_translator(xtr);
1221 nlmsg_cancel(skb, nlh);
1229 static int xfrm_dump_sa_done(struct netlink_callback *cb)
1231 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1232 struct sock *sk = cb->skb->sk;
1233 struct net *net = sock_net(sk);
1236 xfrm_state_walk_done(walk, net);
1240 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1242 struct net *net = sock_net(skb->sk);
1243 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1244 struct xfrm_dump_info info;
1246 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1247 sizeof(cb->args) - sizeof(cb->args[0]));
1249 info.in_skb = cb->skb;
1251 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1252 info.nlmsg_flags = NLM_F_MULTI;
1255 struct nlattr *attrs[XFRMA_MAX+1];
1256 struct xfrm_address_filter *filter = NULL;
1260 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1261 xfrma_policy, cb->extack);
1265 if (attrs[XFRMA_ADDRESS_FILTER]) {
1266 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1267 sizeof(*filter), GFP_KERNEL);
1271 /* see addr_match(), (prefix length >> 5) << 2
1272 * will be used to compare xfrm_address_t
1274 if (filter->splen > (sizeof(xfrm_address_t) << 3) ||
1275 filter->dplen > (sizeof(xfrm_address_t) << 3)) {
1281 if (attrs[XFRMA_PROTO])
1282 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1284 xfrm_state_walk_init(walk, proto, filter);
1288 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1293 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1294 struct xfrm_state *x, u32 seq)
1296 struct xfrm_dump_info info;
1297 struct sk_buff *skb;
1300 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1302 return ERR_PTR(-ENOMEM);
1304 info.in_skb = in_skb;
1306 info.nlmsg_seq = seq;
1307 info.nlmsg_flags = 0;
1309 err = dump_one_state(x, 0, &info);
1312 return ERR_PTR(err);
1318 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1319 * Must be called with RCU read lock.
1321 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1322 u32 pid, unsigned int group)
1324 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1325 struct xfrm_translator *xtr;
1332 xtr = xfrm_get_translator();
1334 int err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1336 xfrm_put_translator(xtr);
1343 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1346 static inline unsigned int xfrm_spdinfo_msgsize(void)
1348 return NLMSG_ALIGN(4)
1349 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1350 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1351 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1352 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1355 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1356 u32 portid, u32 seq, u32 flags)
1358 struct xfrmk_spdinfo si;
1359 struct xfrmu_spdinfo spc;
1360 struct xfrmu_spdhinfo sph;
1361 struct xfrmu_spdhthresh spt4, spt6;
1362 struct nlmsghdr *nlh;
1367 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1368 if (nlh == NULL) /* shouldn't really happen ... */
1371 f = nlmsg_data(nlh);
1373 xfrm_spd_getinfo(net, &si);
1374 spc.incnt = si.incnt;
1375 spc.outcnt = si.outcnt;
1376 spc.fwdcnt = si.fwdcnt;
1377 spc.inscnt = si.inscnt;
1378 spc.outscnt = si.outscnt;
1379 spc.fwdscnt = si.fwdscnt;
1380 sph.spdhcnt = si.spdhcnt;
1381 sph.spdhmcnt = si.spdhmcnt;
1384 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1386 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1387 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1388 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1389 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1390 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1392 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1394 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1396 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1398 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1400 nlmsg_cancel(skb, nlh);
1404 nlmsg_end(skb, nlh);
1408 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1409 struct nlattr **attrs,
1410 struct netlink_ext_ack *extack)
1412 struct net *net = sock_net(skb->sk);
1413 struct xfrmu_spdhthresh *thresh4 = NULL;
1414 struct xfrmu_spdhthresh *thresh6 = NULL;
1416 /* selector prefixlen thresholds to hash policies */
1417 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1418 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1420 if (nla_len(rta) < sizeof(*thresh4)) {
1421 NL_SET_ERR_MSG(extack, "Invalid SPD_IPV4_HTHRESH attribute length");
1424 thresh4 = nla_data(rta);
1425 if (thresh4->lbits > 32 || thresh4->rbits > 32) {
1426 NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 32 for IPv4)");
1430 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1431 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1433 if (nla_len(rta) < sizeof(*thresh6)) {
1434 NL_SET_ERR_MSG(extack, "Invalid SPD_IPV6_HTHRESH attribute length");
1437 thresh6 = nla_data(rta);
1438 if (thresh6->lbits > 128 || thresh6->rbits > 128) {
1439 NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 128 for IPv6)");
1444 if (thresh4 || thresh6) {
1445 write_seqlock(&net->xfrm.policy_hthresh.lock);
1447 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1448 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1451 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1452 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1454 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1456 xfrm_policy_hash_rebuild(net);
1462 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1463 struct nlattr **attrs,
1464 struct netlink_ext_ack *extack)
1466 struct net *net = sock_net(skb->sk);
1467 struct sk_buff *r_skb;
1468 u32 *flags = nlmsg_data(nlh);
1469 u32 sportid = NETLINK_CB(skb).portid;
1470 u32 seq = nlh->nlmsg_seq;
1473 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1477 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1480 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1483 static inline unsigned int xfrm_sadinfo_msgsize(void)
1485 return NLMSG_ALIGN(4)
1486 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1487 + nla_total_size(4); /* XFRMA_SAD_CNT */
1490 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1491 u32 portid, u32 seq, u32 flags)
1493 struct xfrmk_sadinfo si;
1494 struct xfrmu_sadhinfo sh;
1495 struct nlmsghdr *nlh;
1499 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1500 if (nlh == NULL) /* shouldn't really happen ... */
1503 f = nlmsg_data(nlh);
1505 xfrm_sad_getinfo(net, &si);
1507 sh.sadhmcnt = si.sadhmcnt;
1508 sh.sadhcnt = si.sadhcnt;
1510 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1512 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1514 nlmsg_cancel(skb, nlh);
1518 nlmsg_end(skb, nlh);
1522 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1523 struct nlattr **attrs,
1524 struct netlink_ext_ack *extack)
1526 struct net *net = sock_net(skb->sk);
1527 struct sk_buff *r_skb;
1528 u32 *flags = nlmsg_data(nlh);
1529 u32 sportid = NETLINK_CB(skb).portid;
1530 u32 seq = nlh->nlmsg_seq;
1533 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1537 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1540 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1543 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1544 struct nlattr **attrs, struct netlink_ext_ack *extack)
1546 struct net *net = sock_net(skb->sk);
1547 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1548 struct xfrm_state *x;
1549 struct sk_buff *resp_skb;
1552 x = xfrm_user_state_lookup(net, p, attrs, &err);
1556 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1557 if (IS_ERR(resp_skb)) {
1558 err = PTR_ERR(resp_skb);
1560 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1567 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1568 struct nlattr **attrs,
1569 struct netlink_ext_ack *extack)
1571 struct net *net = sock_net(skb->sk);
1572 struct xfrm_state *x;
1573 struct xfrm_userspi_info *p;
1574 struct xfrm_translator *xtr;
1575 struct sk_buff *resp_skb;
1576 xfrm_address_t *daddr;
1583 p = nlmsg_data(nlh);
1584 err = verify_spi_info(p->info.id.proto, p->min, p->max, extack);
1588 family = p->info.family;
1589 daddr = &p->info.id.daddr;
1593 mark = xfrm_mark_get(attrs, &m);
1595 if (attrs[XFRMA_IF_ID])
1596 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1599 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1600 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1607 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1608 if_id, p->info.id.proto, daddr,
1613 NL_SET_ERR_MSG(extack, "Target ACQUIRE not found");
1617 err = xfrm_alloc_spi(x, p->min, p->max, extack);
1621 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1622 if (IS_ERR(resp_skb)) {
1623 err = PTR_ERR(resp_skb);
1627 xtr = xfrm_get_translator();
1629 err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1631 xfrm_put_translator(xtr);
1633 kfree_skb(resp_skb);
1638 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1646 static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack)
1649 case XFRM_POLICY_IN:
1650 case XFRM_POLICY_OUT:
1651 case XFRM_POLICY_FWD:
1655 NL_SET_ERR_MSG(extack, "Invalid policy direction");
1662 static int verify_policy_type(u8 type, struct netlink_ext_ack *extack)
1665 case XFRM_POLICY_TYPE_MAIN:
1666 #ifdef CONFIG_XFRM_SUB_POLICY
1667 case XFRM_POLICY_TYPE_SUB:
1672 NL_SET_ERR_MSG(extack, "Invalid policy type");
1679 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p,
1680 struct netlink_ext_ack *extack)
1685 case XFRM_SHARE_ANY:
1686 case XFRM_SHARE_SESSION:
1687 case XFRM_SHARE_USER:
1688 case XFRM_SHARE_UNIQUE:
1692 NL_SET_ERR_MSG(extack, "Invalid policy share");
1696 switch (p->action) {
1697 case XFRM_POLICY_ALLOW:
1698 case XFRM_POLICY_BLOCK:
1702 NL_SET_ERR_MSG(extack, "Invalid policy action");
1706 switch (p->sel.family) {
1708 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
1709 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
1716 #if IS_ENABLED(CONFIG_IPV6)
1717 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
1718 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
1724 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
1725 return -EAFNOSUPPORT;
1729 NL_SET_ERR_MSG(extack, "Invalid selector family");
1733 ret = verify_policy_dir(p->dir, extack);
1736 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) {
1737 NL_SET_ERR_MSG(extack, "Policy index doesn't match direction");
1744 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1746 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1747 struct xfrm_user_sec_ctx *uctx;
1752 uctx = nla_data(rt);
1753 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1756 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1762 for (i = 0; i < nr; i++, ut++) {
1763 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1765 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1766 memcpy(&t->saddr, &ut->saddr,
1767 sizeof(xfrm_address_t));
1768 t->reqid = ut->reqid;
1770 t->share = ut->share;
1771 t->optional = ut->optional;
1772 t->aalgos = ut->aalgos;
1773 t->ealgos = ut->ealgos;
1774 t->calgos = ut->calgos;
1775 /* If all masks are ~0, then we allow all algorithms. */
1776 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1777 t->encap_family = ut->family;
1781 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,
1782 int dir, struct netlink_ext_ack *extack)
1787 if (nr > XFRM_MAX_DEPTH) {
1788 NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")");
1792 prev_family = family;
1794 for (i = 0; i < nr; i++) {
1795 /* We never validated the ut->family value, so many
1796 * applications simply leave it at zero. The check was
1797 * never made and ut->family was ignored because all
1798 * templates could be assumed to have the same family as
1799 * the policy itself. Now that we will have ipv4-in-ipv6
1800 * and ipv6-in-ipv4 tunnels, this is no longer true.
1803 ut[i].family = family;
1805 switch (ut[i].mode) {
1806 case XFRM_MODE_TUNNEL:
1807 case XFRM_MODE_BEET:
1808 if (ut[i].optional && dir == XFRM_POLICY_OUT) {
1809 NL_SET_ERR_MSG(extack, "Mode in optional template not allowed in outbound policy");
1814 if (ut[i].family != prev_family) {
1815 NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change");
1820 if (ut[i].mode >= XFRM_MODE_MAX) {
1821 NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")");
1825 prev_family = ut[i].family;
1827 switch (ut[i].family) {
1830 #if IS_ENABLED(CONFIG_IPV6)
1835 NL_SET_ERR_MSG(extack, "Invalid family in template");
1839 if (!xfrm_id_proto_valid(ut[i].id.proto)) {
1840 NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template");
1848 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs,
1849 int dir, struct netlink_ext_ack *extack)
1851 struct nlattr *rt = attrs[XFRMA_TMPL];
1856 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1857 int nr = nla_len(rt) / sizeof(*utmpl);
1860 err = validate_tmpl(nr, utmpl, pol->family, dir, extack);
1864 copy_templates(pol, utmpl, nr);
1869 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs,
1870 struct netlink_ext_ack *extack)
1872 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1873 struct xfrm_userpolicy_type *upt;
1874 u8 type = XFRM_POLICY_TYPE_MAIN;
1882 err = verify_policy_type(type, extack);
1890 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1892 xp->priority = p->priority;
1893 xp->index = p->index;
1894 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1895 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1896 xp->action = p->action;
1897 xp->flags = p->flags;
1898 xp->family = p->sel.family;
1899 /* XXX xp->share = p->share; */
1902 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1904 memset(p, 0, sizeof(*p));
1905 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1906 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1907 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1908 p->priority = xp->priority;
1909 p->index = xp->index;
1910 p->sel.family = xp->family;
1912 p->action = xp->action;
1913 p->flags = xp->flags;
1914 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1917 static struct xfrm_policy *xfrm_policy_construct(struct net *net,
1918 struct xfrm_userpolicy_info *p,
1919 struct nlattr **attrs,
1921 struct netlink_ext_ack *extack)
1923 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1931 copy_from_user_policy(xp, p);
1933 err = copy_from_user_policy_type(&xp->type, attrs, extack);
1937 if (!(err = copy_from_user_tmpl(xp, attrs, p->dir, extack)))
1938 err = copy_from_user_sec_ctx(xp, attrs);
1942 xfrm_mark_get(attrs, &xp->mark);
1944 if (attrs[XFRMA_IF_ID])
1945 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1947 /* configure the hardware if offload is requested */
1948 if (attrs[XFRMA_OFFLOAD_DEV]) {
1949 err = xfrm_dev_policy_add(net, xp,
1950 nla_data(attrs[XFRMA_OFFLOAD_DEV]),
1960 xfrm_policy_destroy(xp);
1964 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1965 struct nlattr **attrs,
1966 struct netlink_ext_ack *extack)
1968 struct net *net = sock_net(skb->sk);
1969 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1970 struct xfrm_policy *xp;
1975 err = verify_newpolicy_info(p, extack);
1978 err = verify_sec_ctx_len(attrs, extack);
1982 xp = xfrm_policy_construct(net, p, attrs, &err, extack);
1986 /* shouldn't excl be based on nlh flags??
1987 * Aha! this is anti-netlink really i.e more pfkey derived
1988 * in netlink excl is a flag and you wouldn't need
1989 * a type XFRM_MSG_UPDPOLICY - JHS */
1990 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1991 err = xfrm_policy_insert(p->dir, xp, excl);
1992 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1995 xfrm_dev_policy_delete(xp);
1996 xfrm_dev_policy_free(xp);
1997 security_xfrm_policy_free(xp->security);
2002 c.event = nlh->nlmsg_type;
2003 c.seq = nlh->nlmsg_seq;
2004 c.portid = nlh->nlmsg_pid;
2005 km_policy_notify(xp, p->dir, &c);
2012 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
2014 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
2017 if (xp->xfrm_nr == 0)
2020 if (xp->xfrm_nr > XFRM_MAX_DEPTH)
2023 for (i = 0; i < xp->xfrm_nr; i++) {
2024 struct xfrm_user_tmpl *up = &vec[i];
2025 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
2027 memset(up, 0, sizeof(*up));
2028 memcpy(&up->id, &kp->id, sizeof(up->id));
2029 up->family = kp->encap_family;
2030 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
2031 up->reqid = kp->reqid;
2032 up->mode = kp->mode;
2033 up->share = kp->share;
2034 up->optional = kp->optional;
2035 up->aalgos = kp->aalgos;
2036 up->ealgos = kp->ealgos;
2037 up->calgos = kp->calgos;
2040 return nla_put(skb, XFRMA_TMPL,
2041 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
2044 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
2047 return copy_sec_ctx(x->security, skb);
2052 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
2055 return copy_sec_ctx(xp->security, skb);
2058 static inline unsigned int userpolicy_type_attrsize(void)
2060 #ifdef CONFIG_XFRM_SUB_POLICY
2061 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
2067 #ifdef CONFIG_XFRM_SUB_POLICY
2068 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
2070 struct xfrm_userpolicy_type upt;
2072 /* Sadly there are two holes in struct xfrm_userpolicy_type */
2073 memset(&upt, 0, sizeof(upt));
2076 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
2080 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
2086 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
2088 struct xfrm_dump_info *sp = ptr;
2089 struct xfrm_userpolicy_info *p;
2090 struct sk_buff *in_skb = sp->in_skb;
2091 struct sk_buff *skb = sp->out_skb;
2092 struct xfrm_translator *xtr;
2093 struct nlmsghdr *nlh;
2096 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
2097 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
2101 p = nlmsg_data(nlh);
2102 copy_to_user_policy(xp, p, dir);
2103 err = copy_to_user_tmpl(xp, skb);
2105 err = copy_to_user_sec_ctx(xp, skb);
2107 err = copy_to_user_policy_type(xp->type, skb);
2109 err = xfrm_mark_put(skb, &xp->mark);
2111 err = xfrm_if_id_put(skb, xp->if_id);
2112 if (!err && xp->xdo.dev)
2113 err = copy_user_offload(&xp->xdo, skb);
2115 nlmsg_cancel(skb, nlh);
2118 nlmsg_end(skb, nlh);
2120 xtr = xfrm_get_translator();
2122 err = xtr->alloc_compat(skb, nlh);
2124 xfrm_put_translator(xtr);
2126 nlmsg_cancel(skb, nlh);
2134 static int xfrm_dump_policy_done(struct netlink_callback *cb)
2136 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2137 struct net *net = sock_net(cb->skb->sk);
2139 xfrm_policy_walk_done(walk, net);
2143 static int xfrm_dump_policy_start(struct netlink_callback *cb)
2145 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2147 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
2149 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
2153 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
2155 struct net *net = sock_net(skb->sk);
2156 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2157 struct xfrm_dump_info info;
2159 info.in_skb = cb->skb;
2161 info.nlmsg_seq = cb->nlh->nlmsg_seq;
2162 info.nlmsg_flags = NLM_F_MULTI;
2164 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
2169 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
2170 struct xfrm_policy *xp,
2173 struct xfrm_dump_info info;
2174 struct sk_buff *skb;
2177 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2179 return ERR_PTR(-ENOMEM);
2181 info.in_skb = in_skb;
2183 info.nlmsg_seq = seq;
2184 info.nlmsg_flags = 0;
2186 err = dump_one_policy(xp, dir, 0, &info);
2189 return ERR_PTR(err);
2195 static int xfrm_notify_userpolicy(struct net *net)
2197 struct xfrm_userpolicy_default *up;
2198 int len = NLMSG_ALIGN(sizeof(*up));
2199 struct nlmsghdr *nlh;
2200 struct sk_buff *skb;
2203 skb = nlmsg_new(len, GFP_ATOMIC);
2207 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0);
2213 up = nlmsg_data(nlh);
2214 up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
2215 up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
2216 up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
2218 nlmsg_end(skb, nlh);
2221 err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
2227 static bool xfrm_userpolicy_is_valid(__u8 policy)
2229 return policy == XFRM_USERPOLICY_BLOCK ||
2230 policy == XFRM_USERPOLICY_ACCEPT;
2233 static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2234 struct nlattr **attrs, struct netlink_ext_ack *extack)
2236 struct net *net = sock_net(skb->sk);
2237 struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
2239 if (xfrm_userpolicy_is_valid(up->in))
2240 net->xfrm.policy_default[XFRM_POLICY_IN] = up->in;
2242 if (xfrm_userpolicy_is_valid(up->fwd))
2243 net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd;
2245 if (xfrm_userpolicy_is_valid(up->out))
2246 net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out;
2248 rt_genid_bump_all(net);
2250 xfrm_notify_userpolicy(net);
2254 static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2255 struct nlattr **attrs, struct netlink_ext_ack *extack)
2257 struct sk_buff *r_skb;
2258 struct nlmsghdr *r_nlh;
2259 struct net *net = sock_net(skb->sk);
2260 struct xfrm_userpolicy_default *r_up;
2261 int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default));
2262 u32 portid = NETLINK_CB(skb).portid;
2263 u32 seq = nlh->nlmsg_seq;
2265 r_skb = nlmsg_new(len, GFP_ATOMIC);
2269 r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0);
2275 r_up = nlmsg_data(r_nlh);
2276 r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
2277 r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
2278 r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
2279 nlmsg_end(r_skb, r_nlh);
2281 return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid);
2284 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2285 struct nlattr **attrs,
2286 struct netlink_ext_ack *extack)
2288 struct net *net = sock_net(skb->sk);
2289 struct xfrm_policy *xp;
2290 struct xfrm_userpolicy_id *p;
2291 u8 type = XFRM_POLICY_TYPE_MAIN;
2298 p = nlmsg_data(nlh);
2299 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
2301 err = copy_from_user_policy_type(&type, attrs, extack);
2305 err = verify_policy_dir(p->dir, extack);
2309 if (attrs[XFRMA_IF_ID])
2310 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2312 xfrm_mark_get(attrs, &m);
2315 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir,
2316 p->index, delete, &err);
2318 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2319 struct xfrm_sec_ctx *ctx;
2321 err = verify_sec_ctx_len(attrs, extack);
2327 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2329 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2333 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2334 &p->sel, ctx, delete, &err);
2335 security_xfrm_policy_free(ctx);
2341 struct sk_buff *resp_skb;
2343 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
2344 if (IS_ERR(resp_skb)) {
2345 err = PTR_ERR(resp_skb);
2347 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
2348 NETLINK_CB(skb).portid);
2351 xfrm_dev_policy_delete(xp);
2352 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2357 c.data.byid = p->index;
2358 c.event = nlh->nlmsg_type;
2359 c.seq = nlh->nlmsg_seq;
2360 c.portid = nlh->nlmsg_pid;
2361 km_policy_notify(xp, p->dir, &c);
2369 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
2370 struct nlattr **attrs,
2371 struct netlink_ext_ack *extack)
2373 struct net *net = sock_net(skb->sk);
2375 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
2378 err = xfrm_state_flush(net, p->proto, true, false);
2380 if (err == -ESRCH) /* empty table */
2384 c.data.proto = p->proto;
2385 c.event = nlh->nlmsg_type;
2386 c.seq = nlh->nlmsg_seq;
2387 c.portid = nlh->nlmsg_pid;
2389 km_state_notify(NULL, &c);
2394 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
2396 unsigned int replay_size = x->replay_esn ?
2397 xfrm_replay_state_esn_len(x->replay_esn) :
2398 sizeof(struct xfrm_replay_state);
2400 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
2401 + nla_total_size(replay_size)
2402 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
2403 + nla_total_size(sizeof(struct xfrm_mark))
2404 + nla_total_size(4) /* XFRM_AE_RTHR */
2405 + nla_total_size(4); /* XFRM_AE_ETHR */
2408 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2410 struct xfrm_aevent_id *id;
2411 struct nlmsghdr *nlh;
2414 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
2418 id = nlmsg_data(nlh);
2419 memset(&id->sa_id, 0, sizeof(id->sa_id));
2420 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
2421 id->sa_id.spi = x->id.spi;
2422 id->sa_id.family = x->props.family;
2423 id->sa_id.proto = x->id.proto;
2424 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2425 id->reqid = x->props.reqid;
2426 id->flags = c->data.aevent;
2428 if (x->replay_esn) {
2429 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
2430 xfrm_replay_state_esn_len(x->replay_esn),
2433 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
2438 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2443 if (id->flags & XFRM_AE_RTHR) {
2444 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2448 if (id->flags & XFRM_AE_ETHR) {
2449 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2450 x->replay_maxage * 10 / HZ);
2454 err = xfrm_mark_put(skb, &x->mark);
2458 err = xfrm_if_id_put(skb, x->if_id);
2462 nlmsg_end(skb, nlh);
2466 nlmsg_cancel(skb, nlh);
2470 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2471 struct nlattr **attrs, struct netlink_ext_ack *extack)
2473 struct net *net = sock_net(skb->sk);
2474 struct xfrm_state *x;
2475 struct sk_buff *r_skb;
2480 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2481 struct xfrm_usersa_id *id = &p->sa_id;
2483 mark = xfrm_mark_get(attrs, &m);
2485 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2489 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2490 if (r_skb == NULL) {
2496 * XXX: is this lock really needed - none of the other
2497 * gets lock (the concern is things getting updated
2498 * while we are still reading) - jhs
2500 spin_lock_bh(&x->lock);
2501 c.data.aevent = p->flags;
2502 c.seq = nlh->nlmsg_seq;
2503 c.portid = nlh->nlmsg_pid;
2505 err = build_aevent(r_skb, x, &c);
2508 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2509 spin_unlock_bh(&x->lock);
2514 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2515 struct nlattr **attrs, struct netlink_ext_ack *extack)
2517 struct net *net = sock_net(skb->sk);
2518 struct xfrm_state *x;
2523 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2524 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2525 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2526 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2527 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2528 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2530 if (!lt && !rp && !re && !et && !rt) {
2531 NL_SET_ERR_MSG(extack, "Missing required attribute for AE");
2535 /* pedantic mode - thou shalt sayeth replaceth */
2536 if (!(nlh->nlmsg_flags & NLM_F_REPLACE)) {
2537 NL_SET_ERR_MSG(extack, "NLM_F_REPLACE flag is required");
2541 mark = xfrm_mark_get(attrs, &m);
2543 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2547 if (x->km.state != XFRM_STATE_VALID) {
2548 NL_SET_ERR_MSG(extack, "SA must be in VALID state");
2552 err = xfrm_replay_verify_len(x->replay_esn, re, extack);
2556 spin_lock_bh(&x->lock);
2557 xfrm_update_ae_params(x, attrs, 1);
2558 spin_unlock_bh(&x->lock);
2560 c.event = nlh->nlmsg_type;
2561 c.seq = nlh->nlmsg_seq;
2562 c.portid = nlh->nlmsg_pid;
2563 c.data.aevent = XFRM_AE_CU;
2564 km_state_notify(x, &c);
2571 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2572 struct nlattr **attrs,
2573 struct netlink_ext_ack *extack)
2575 struct net *net = sock_net(skb->sk);
2577 u8 type = XFRM_POLICY_TYPE_MAIN;
2580 err = copy_from_user_policy_type(&type, attrs, extack);
2584 err = xfrm_policy_flush(net, type, true);
2586 if (err == -ESRCH) /* empty table */
2592 c.event = nlh->nlmsg_type;
2593 c.seq = nlh->nlmsg_seq;
2594 c.portid = nlh->nlmsg_pid;
2596 km_policy_notify(NULL, 0, &c);
2600 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2601 struct nlattr **attrs,
2602 struct netlink_ext_ack *extack)
2604 struct net *net = sock_net(skb->sk);
2605 struct xfrm_policy *xp;
2606 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2607 struct xfrm_userpolicy_info *p = &up->pol;
2608 u8 type = XFRM_POLICY_TYPE_MAIN;
2613 err = copy_from_user_policy_type(&type, attrs, extack);
2617 err = verify_policy_dir(p->dir, extack);
2621 if (attrs[XFRMA_IF_ID])
2622 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2624 xfrm_mark_get(attrs, &m);
2627 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index,
2630 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2631 struct xfrm_sec_ctx *ctx;
2633 err = verify_sec_ctx_len(attrs, extack);
2639 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2641 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2645 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2646 &p->sel, ctx, 0, &err);
2647 security_xfrm_policy_free(ctx);
2652 if (unlikely(xp->walk.dead))
2657 xfrm_policy_delete(xp, p->dir);
2658 xfrm_audit_policy_delete(xp, 1, true);
2660 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2667 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2668 struct nlattr **attrs,
2669 struct netlink_ext_ack *extack)
2671 struct net *net = sock_net(skb->sk);
2672 struct xfrm_state *x;
2674 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2675 struct xfrm_usersa_info *p = &ue->state;
2677 u32 mark = xfrm_mark_get(attrs, &m);
2679 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2685 spin_lock_bh(&x->lock);
2687 if (x->km.state != XFRM_STATE_VALID) {
2688 NL_SET_ERR_MSG(extack, "SA must be in VALID state");
2692 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2695 __xfrm_state_delete(x);
2696 xfrm_audit_state_delete(x, 1, true);
2700 spin_unlock_bh(&x->lock);
2705 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2706 struct nlattr **attrs,
2707 struct netlink_ext_ack *extack)
2709 struct net *net = sock_net(skb->sk);
2710 struct xfrm_policy *xp;
2711 struct xfrm_user_tmpl *ut;
2713 struct nlattr *rt = attrs[XFRMA_TMPL];
2714 struct xfrm_mark mark;
2716 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2717 struct xfrm_state *x = xfrm_state_alloc(net);
2723 xfrm_mark_get(attrs, &mark);
2725 err = verify_newpolicy_info(&ua->policy, extack);
2728 err = verify_sec_ctx_len(attrs, extack);
2733 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack);
2737 memcpy(&x->id, &ua->id, sizeof(ua->id));
2738 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2739 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2740 xp->mark.m = x->mark.m = mark.m;
2741 xp->mark.v = x->mark.v = mark.v;
2743 /* extract the templates and for each call km_key */
2744 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2745 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2746 memcpy(&x->id, &t->id, sizeof(x->id));
2747 x->props.mode = t->mode;
2748 x->props.reqid = t->reqid;
2749 x->props.family = ut->family;
2750 t->aalgos = ua->aalgos;
2751 t->ealgos = ua->ealgos;
2752 t->calgos = ua->calgos;
2753 err = km_query(x, t, xp);
2768 #ifdef CONFIG_XFRM_MIGRATE
2769 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2770 struct xfrm_kmaddress *k,
2771 struct nlattr **attrs, int *num,
2772 struct netlink_ext_ack *extack)
2774 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2775 struct xfrm_user_migrate *um;
2779 struct xfrm_user_kmaddress *uk;
2781 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2782 memcpy(&k->local, &uk->local, sizeof(k->local));
2783 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2784 k->family = uk->family;
2785 k->reserved = uk->reserved;
2789 num_migrate = nla_len(rt) / sizeof(*um);
2791 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) {
2792 NL_SET_ERR_MSG(extack, "Invalid number of SAs to migrate, must be 0 < num <= XFRM_MAX_DEPTH (6)");
2796 for (i = 0; i < num_migrate; i++, um++, ma++) {
2797 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2798 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2799 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2800 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2802 ma->proto = um->proto;
2803 ma->mode = um->mode;
2804 ma->reqid = um->reqid;
2806 ma->old_family = um->old_family;
2807 ma->new_family = um->new_family;
2814 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2815 struct nlattr **attrs, struct netlink_ext_ack *extack)
2817 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2818 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2819 struct xfrm_kmaddress km, *kmp;
2823 struct net *net = sock_net(skb->sk);
2824 struct xfrm_encap_tmpl *encap = NULL;
2827 if (!attrs[XFRMA_MIGRATE]) {
2828 NL_SET_ERR_MSG(extack, "Missing required MIGRATE attribute");
2832 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2834 err = copy_from_user_policy_type(&type, attrs, extack);
2838 err = copy_from_user_migrate(m, kmp, attrs, &n, extack);
2845 if (attrs[XFRMA_ENCAP]) {
2846 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2847 sizeof(*encap), GFP_KERNEL);
2852 if (attrs[XFRMA_IF_ID])
2853 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2855 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap,
2863 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2864 struct nlattr **attrs, struct netlink_ext_ack *extack)
2866 return -ENOPROTOOPT;
2870 #ifdef CONFIG_XFRM_MIGRATE
2871 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2873 struct xfrm_user_migrate um;
2875 memset(&um, 0, sizeof(um));
2876 um.proto = m->proto;
2878 um.reqid = m->reqid;
2879 um.old_family = m->old_family;
2880 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2881 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2882 um.new_family = m->new_family;
2883 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2884 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2886 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2889 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2891 struct xfrm_user_kmaddress uk;
2893 memset(&uk, 0, sizeof(uk));
2894 uk.family = k->family;
2895 uk.reserved = k->reserved;
2896 memcpy(&uk.local, &k->local, sizeof(uk.local));
2897 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2899 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2902 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2905 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2906 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2907 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2908 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2909 + userpolicy_type_attrsize();
2912 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2913 int num_migrate, const struct xfrm_kmaddress *k,
2914 const struct xfrm_selector *sel,
2915 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2917 const struct xfrm_migrate *mp;
2918 struct xfrm_userpolicy_id *pol_id;
2919 struct nlmsghdr *nlh;
2922 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2926 pol_id = nlmsg_data(nlh);
2927 /* copy data from selector, dir, and type to the pol_id */
2928 memset(pol_id, 0, sizeof(*pol_id));
2929 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2933 err = copy_to_user_kmaddress(k, skb);
2938 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2942 err = copy_to_user_policy_type(type, skb);
2945 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2946 err = copy_to_user_migrate(mp, skb);
2951 nlmsg_end(skb, nlh);
2955 nlmsg_cancel(skb, nlh);
2959 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2960 const struct xfrm_migrate *m, int num_migrate,
2961 const struct xfrm_kmaddress *k,
2962 const struct xfrm_encap_tmpl *encap)
2964 struct net *net = &init_net;
2965 struct sk_buff *skb;
2968 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2974 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2977 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2980 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2981 const struct xfrm_migrate *m, int num_migrate,
2982 const struct xfrm_kmaddress *k,
2983 const struct xfrm_encap_tmpl *encap)
2985 return -ENOPROTOOPT;
2989 #define XMSGSIZE(type) sizeof(struct type)
2991 const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2992 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2993 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2994 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2995 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2996 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2997 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2998 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2999 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
3000 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
3001 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
3002 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
3003 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
3004 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
3005 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
3006 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
3007 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
3008 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
3009 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
3010 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
3011 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
3012 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
3013 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
3014 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
3016 EXPORT_SYMBOL_GPL(xfrm_msg_min);
3020 const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
3021 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
3022 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
3023 [XFRMA_LASTUSED] = { .type = NLA_U64},
3024 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
3025 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
3026 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
3027 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
3028 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
3029 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
3030 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
3031 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) },
3032 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
3033 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
3034 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
3035 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
3036 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
3037 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
3038 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
3039 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
3040 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
3041 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
3042 [XFRMA_TFCPAD] = { .type = NLA_U32 },
3043 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
3044 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
3045 [XFRMA_PROTO] = { .type = NLA_U8 },
3046 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
3047 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
3048 [XFRMA_SET_MARK] = { .type = NLA_U32 },
3049 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
3050 [XFRMA_IF_ID] = { .type = NLA_U32 },
3051 [XFRMA_MTIMER_THRESH] = { .type = NLA_U32 },
3053 EXPORT_SYMBOL_GPL(xfrma_policy);
3055 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
3056 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
3057 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
3060 static const struct xfrm_link {
3061 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **,
3062 struct netlink_ext_ack *);
3063 int (*start)(struct netlink_callback *);
3064 int (*dump)(struct sk_buff *, struct netlink_callback *);
3065 int (*done)(struct netlink_callback *);
3066 const struct nla_policy *nla_pol;
3068 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
3069 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
3070 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
3071 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
3072 .dump = xfrm_dump_sa,
3073 .done = xfrm_dump_sa_done },
3074 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
3075 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
3076 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
3077 .start = xfrm_dump_policy_start,
3078 .dump = xfrm_dump_policy,
3079 .done = xfrm_dump_policy_done },
3080 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
3081 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
3082 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
3083 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
3084 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
3085 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
3086 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
3087 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
3088 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
3089 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
3090 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
3091 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
3092 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
3093 .nla_pol = xfrma_spd_policy,
3094 .nla_max = XFRMA_SPD_MAX },
3095 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
3096 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default },
3097 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default },
3100 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
3101 struct netlink_ext_ack *extack)
3103 struct net *net = sock_net(skb->sk);
3104 struct nlattr *attrs[XFRMA_MAX+1];
3105 const struct xfrm_link *link;
3106 struct nlmsghdr *nlh64 = NULL;
3109 type = nlh->nlmsg_type;
3110 if (type > XFRM_MSG_MAX)
3113 type -= XFRM_MSG_BASE;
3114 link = &xfrm_dispatch[type];
3116 /* All operations require privileges, even GET */
3117 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
3120 if (in_compat_syscall()) {
3121 struct xfrm_translator *xtr = xfrm_get_translator();
3126 nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max,
3127 link->nla_pol, extack);
3128 xfrm_put_translator(xtr);
3130 return PTR_ERR(nlh64);
3135 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
3136 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
3137 (nlh->nlmsg_flags & NLM_F_DUMP)) {
3138 struct netlink_dump_control c = {
3139 .start = link->start,
3144 if (link->dump == NULL) {
3149 err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
3153 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
3154 link->nla_max ? : XFRMA_MAX,
3155 link->nla_pol ? : xfrma_policy, extack);
3159 if (link->doit == NULL) {
3164 err = link->doit(skb, nlh, attrs, extack);
3166 /* We need to free skb allocated in xfrm_alloc_compat() before
3167 * returning from this function, because consume_skb() won't take
3168 * care of frag_list since netlink destructor sets
3169 * sbk->head to NULL. (see netlink_skb_destructor())
3171 if (skb_has_frag_list(skb)) {
3172 kfree_skb(skb_shinfo(skb)->frag_list);
3173 skb_shinfo(skb)->frag_list = NULL;
3181 static void xfrm_netlink_rcv(struct sk_buff *skb)
3183 struct net *net = sock_net(skb->sk);
3185 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3186 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
3187 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3190 static inline unsigned int xfrm_expire_msgsize(void)
3192 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
3193 + nla_total_size(sizeof(struct xfrm_mark));
3196 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
3198 struct xfrm_user_expire *ue;
3199 struct nlmsghdr *nlh;
3202 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
3206 ue = nlmsg_data(nlh);
3207 copy_to_user_state(x, &ue->state);
3208 ue->hard = (c->data.hard != 0) ? 1 : 0;
3209 /* clear the padding bytes */
3210 memset_after(ue, 0, hard);
3212 err = xfrm_mark_put(skb, &x->mark);
3216 err = xfrm_if_id_put(skb, x->if_id);
3220 nlmsg_end(skb, nlh);
3224 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
3226 struct net *net = xs_net(x);
3227 struct sk_buff *skb;
3229 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
3233 if (build_expire(skb, x, c) < 0) {
3238 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3241 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
3243 struct net *net = xs_net(x);
3244 struct sk_buff *skb;
3247 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
3251 err = build_aevent(skb, x, c);
3254 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
3257 static int xfrm_notify_sa_flush(const struct km_event *c)
3259 struct net *net = c->net;
3260 struct xfrm_usersa_flush *p;
3261 struct nlmsghdr *nlh;
3262 struct sk_buff *skb;
3263 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
3265 skb = nlmsg_new(len, GFP_ATOMIC);
3269 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
3275 p = nlmsg_data(nlh);
3276 p->proto = c->data.proto;
3278 nlmsg_end(skb, nlh);
3280 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3283 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
3287 l += nla_total_size(aead_len(x->aead));
3289 l += nla_total_size(sizeof(struct xfrm_algo) +
3290 (x->aalg->alg_key_len + 7) / 8);
3291 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
3294 l += nla_total_size(xfrm_alg_len(x->ealg));
3296 l += nla_total_size(sizeof(*x->calg));
3298 l += nla_total_size(sizeof(*x->encap));
3300 l += nla_total_size(sizeof(x->tfcpad));
3302 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
3304 l += nla_total_size(sizeof(struct xfrm_replay_state));
3306 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
3307 x->security->ctx_len);
3309 l += nla_total_size(sizeof(*x->coaddr));
3310 if (x->props.extra_flags)
3311 l += nla_total_size(sizeof(x->props.extra_flags));
3313 l += nla_total_size(sizeof(struct xfrm_user_offload));
3314 if (x->props.smark.v | x->props.smark.m) {
3315 l += nla_total_size(sizeof(x->props.smark.v));
3316 l += nla_total_size(sizeof(x->props.smark.m));
3319 l += nla_total_size(sizeof(x->if_id));
3321 /* Must count x->lastused as it may become non-zero behind our back. */
3322 l += nla_total_size_64bit(sizeof(u64));
3324 if (x->mapping_maxage)
3325 l += nla_total_size(sizeof(x->mapping_maxage));
3330 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
3332 struct net *net = xs_net(x);
3333 struct xfrm_usersa_info *p;
3334 struct xfrm_usersa_id *id;
3335 struct nlmsghdr *nlh;
3336 struct sk_buff *skb;
3337 unsigned int len = xfrm_sa_len(x);
3338 unsigned int headlen;
3341 headlen = sizeof(*p);
3342 if (c->event == XFRM_MSG_DELSA) {
3343 len += nla_total_size(headlen);
3344 headlen = sizeof(*id);
3345 len += nla_total_size(sizeof(struct xfrm_mark));
3347 len += NLMSG_ALIGN(headlen);
3349 skb = nlmsg_new(len, GFP_ATOMIC);
3353 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3358 p = nlmsg_data(nlh);
3359 if (c->event == XFRM_MSG_DELSA) {
3360 struct nlattr *attr;
3362 id = nlmsg_data(nlh);
3363 memset(id, 0, sizeof(*id));
3364 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
3365 id->spi = x->id.spi;
3366 id->family = x->props.family;
3367 id->proto = x->id.proto;
3369 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
3376 err = copy_to_user_state_extra(x, p, skb);
3380 nlmsg_end(skb, nlh);
3382 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3389 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
3393 case XFRM_MSG_EXPIRE:
3394 return xfrm_exp_state_notify(x, c);
3395 case XFRM_MSG_NEWAE:
3396 return xfrm_aevent_state_notify(x, c);
3397 case XFRM_MSG_DELSA:
3398 case XFRM_MSG_UPDSA:
3399 case XFRM_MSG_NEWSA:
3400 return xfrm_notify_sa(x, c);
3401 case XFRM_MSG_FLUSHSA:
3402 return xfrm_notify_sa_flush(c);
3404 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
3413 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
3414 struct xfrm_policy *xp)
3416 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
3417 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3418 + nla_total_size(sizeof(struct xfrm_mark))
3419 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
3420 + userpolicy_type_attrsize();
3423 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
3424 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
3426 __u32 seq = xfrm_get_acqseq();
3427 struct xfrm_user_acquire *ua;
3428 struct nlmsghdr *nlh;
3431 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
3435 ua = nlmsg_data(nlh);
3436 memcpy(&ua->id, &x->id, sizeof(ua->id));
3437 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
3438 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
3439 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
3440 ua->aalgos = xt->aalgos;
3441 ua->ealgos = xt->ealgos;
3442 ua->calgos = xt->calgos;
3443 ua->seq = x->km.seq = seq;
3445 err = copy_to_user_tmpl(xp, skb);
3447 err = copy_to_user_state_sec_ctx(x, skb);
3449 err = copy_to_user_policy_type(xp->type, skb);
3451 err = xfrm_mark_put(skb, &xp->mark);
3453 err = xfrm_if_id_put(skb, xp->if_id);
3454 if (!err && xp->xdo.dev)
3455 err = copy_user_offload(&xp->xdo, skb);
3457 nlmsg_cancel(skb, nlh);
3461 nlmsg_end(skb, nlh);
3465 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
3466 struct xfrm_policy *xp)
3468 struct net *net = xs_net(x);
3469 struct sk_buff *skb;
3472 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
3476 err = build_acquire(skb, x, xt, xp);
3479 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
3482 /* User gives us xfrm_user_policy_info followed by an array of 0
3483 * or more templates.
3485 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
3486 u8 *data, int len, int *dir)
3488 struct net *net = sock_net(sk);
3489 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
3490 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
3491 struct xfrm_policy *xp;
3494 switch (sk->sk_family) {
3496 if (opt != IP_XFRM_POLICY) {
3501 #if IS_ENABLED(CONFIG_IPV6)
3503 if (opt != IPV6_XFRM_POLICY) {
3516 if (len < sizeof(*p) ||
3517 verify_newpolicy_info(p, NULL))
3520 nr = ((len - sizeof(*p)) / sizeof(*ut));
3521 if (validate_tmpl(nr, ut, p->sel.family, p->dir, NULL))
3524 if (p->dir > XFRM_POLICY_OUT)
3527 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3533 copy_from_user_policy(xp, p);
3534 xp->type = XFRM_POLICY_TYPE_MAIN;
3535 copy_templates(xp, ut, nr);
3542 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3544 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3545 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3546 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3547 + nla_total_size(sizeof(struct xfrm_mark))
3548 + userpolicy_type_attrsize();
3551 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3552 int dir, const struct km_event *c)
3554 struct xfrm_user_polexpire *upe;
3555 int hard = c->data.hard;
3556 struct nlmsghdr *nlh;
3559 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3563 upe = nlmsg_data(nlh);
3564 copy_to_user_policy(xp, &upe->pol, dir);
3565 err = copy_to_user_tmpl(xp, skb);
3567 err = copy_to_user_sec_ctx(xp, skb);
3569 err = copy_to_user_policy_type(xp->type, skb);
3571 err = xfrm_mark_put(skb, &xp->mark);
3573 err = xfrm_if_id_put(skb, xp->if_id);
3574 if (!err && xp->xdo.dev)
3575 err = copy_user_offload(&xp->xdo, skb);
3577 nlmsg_cancel(skb, nlh);
3582 nlmsg_end(skb, nlh);
3586 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3588 struct net *net = xp_net(xp);
3589 struct sk_buff *skb;
3592 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3596 err = build_polexpire(skb, xp, dir, c);
3599 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3602 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3604 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3605 struct net *net = xp_net(xp);
3606 struct xfrm_userpolicy_info *p;
3607 struct xfrm_userpolicy_id *id;
3608 struct nlmsghdr *nlh;
3609 struct sk_buff *skb;
3610 unsigned int headlen;
3613 headlen = sizeof(*p);
3614 if (c->event == XFRM_MSG_DELPOLICY) {
3615 len += nla_total_size(headlen);
3616 headlen = sizeof(*id);
3618 len += userpolicy_type_attrsize();
3619 len += nla_total_size(sizeof(struct xfrm_mark));
3620 len += NLMSG_ALIGN(headlen);
3622 skb = nlmsg_new(len, GFP_ATOMIC);
3626 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3631 p = nlmsg_data(nlh);
3632 if (c->event == XFRM_MSG_DELPOLICY) {
3633 struct nlattr *attr;
3635 id = nlmsg_data(nlh);
3636 memset(id, 0, sizeof(*id));
3639 id->index = xp->index;
3641 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3643 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3651 copy_to_user_policy(xp, p, dir);
3652 err = copy_to_user_tmpl(xp, skb);
3654 err = copy_to_user_policy_type(xp->type, skb);
3656 err = xfrm_mark_put(skb, &xp->mark);
3658 err = xfrm_if_id_put(skb, xp->if_id);
3659 if (!err && xp->xdo.dev)
3660 err = copy_user_offload(&xp->xdo, skb);
3664 nlmsg_end(skb, nlh);
3666 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3673 static int xfrm_notify_policy_flush(const struct km_event *c)
3675 struct net *net = c->net;
3676 struct nlmsghdr *nlh;
3677 struct sk_buff *skb;
3680 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3684 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3688 err = copy_to_user_policy_type(c->data.type, skb);
3692 nlmsg_end(skb, nlh);
3694 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3701 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3705 case XFRM_MSG_NEWPOLICY:
3706 case XFRM_MSG_UPDPOLICY:
3707 case XFRM_MSG_DELPOLICY:
3708 return xfrm_notify_policy(xp, dir, c);
3709 case XFRM_MSG_FLUSHPOLICY:
3710 return xfrm_notify_policy_flush(c);
3711 case XFRM_MSG_POLEXPIRE:
3712 return xfrm_exp_policy_notify(xp, dir, c);
3714 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3722 static inline unsigned int xfrm_report_msgsize(void)
3724 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3727 static int build_report(struct sk_buff *skb, u8 proto,
3728 struct xfrm_selector *sel, xfrm_address_t *addr)
3730 struct xfrm_user_report *ur;
3731 struct nlmsghdr *nlh;
3733 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3737 ur = nlmsg_data(nlh);
3739 memcpy(&ur->sel, sel, sizeof(ur->sel));
3742 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3744 nlmsg_cancel(skb, nlh);
3748 nlmsg_end(skb, nlh);
3752 static int xfrm_send_report(struct net *net, u8 proto,
3753 struct xfrm_selector *sel, xfrm_address_t *addr)
3755 struct sk_buff *skb;
3758 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3762 err = build_report(skb, proto, sel, addr);
3765 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3768 static inline unsigned int xfrm_mapping_msgsize(void)
3770 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3773 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3774 xfrm_address_t *new_saddr, __be16 new_sport)
3776 struct xfrm_user_mapping *um;
3777 struct nlmsghdr *nlh;
3779 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3783 um = nlmsg_data(nlh);
3785 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3786 um->id.spi = x->id.spi;
3787 um->id.family = x->props.family;
3788 um->id.proto = x->id.proto;
3789 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3790 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3791 um->new_sport = new_sport;
3792 um->old_sport = x->encap->encap_sport;
3793 um->reqid = x->props.reqid;
3795 nlmsg_end(skb, nlh);
3799 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3802 struct net *net = xs_net(x);
3803 struct sk_buff *skb;
3806 if (x->id.proto != IPPROTO_ESP)
3812 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3816 err = build_mapping(skb, x, ipaddr, sport);
3819 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3822 static bool xfrm_is_alive(const struct km_event *c)
3824 return (bool)xfrm_acquire_is_on(c->net);
3827 static struct xfrm_mgr netlink_mgr = {
3828 .notify = xfrm_send_state_notify,
3829 .acquire = xfrm_send_acquire,
3830 .compile_policy = xfrm_compile_policy,
3831 .notify_policy = xfrm_send_policy_notify,
3832 .report = xfrm_send_report,
3833 .migrate = xfrm_send_migrate,
3834 .new_mapping = xfrm_send_mapping,
3835 .is_alive = xfrm_is_alive,
3838 static int __net_init xfrm_user_net_init(struct net *net)
3841 struct netlink_kernel_cfg cfg = {
3842 .groups = XFRMNLGRP_MAX,
3843 .input = xfrm_netlink_rcv,
3846 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3849 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3850 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3854 static void __net_exit xfrm_user_net_pre_exit(struct net *net)
3856 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3859 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3863 list_for_each_entry(net, net_exit_list, exit_list)
3864 netlink_kernel_release(net->xfrm.nlsk_stash);
3867 static struct pernet_operations xfrm_user_net_ops = {
3868 .init = xfrm_user_net_init,
3869 .pre_exit = xfrm_user_net_pre_exit,
3870 .exit_batch = xfrm_user_net_exit,
3873 static int __init xfrm_user_init(void)
3877 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3879 rv = register_pernet_subsys(&xfrm_user_net_ops);
3882 xfrm_register_km(&netlink_mgr);
3886 static void __exit xfrm_user_exit(void)
3888 xfrm_unregister_km(&netlink_mgr);
3889 unregister_pernet_subsys(&xfrm_user_net_ops);
3892 module_init(xfrm_user_init);
3893 module_exit(xfrm_user_exit);
3894 MODULE_DESCRIPTION("XFRM User interface");
3895 MODULE_LICENSE("GPL");
3896 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);