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];
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));
904 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
905 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
906 put_unaligned(x->stats.replay, &p->stats.replay);
907 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
908 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
909 p->mode = x->props.mode;
910 p->replay_window = x->props.replay_window;
911 p->reqid = x->props.reqid;
912 p->family = x->props.family;
913 p->flags = x->props.flags;
917 struct xfrm_dump_info {
918 struct sk_buff *in_skb;
919 struct sk_buff *out_skb;
924 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
926 struct xfrm_user_sec_ctx *uctx;
928 int ctx_size = sizeof(*uctx) + s->ctx_len;
930 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
934 uctx = nla_data(attr);
935 uctx->exttype = XFRMA_SEC_CTX;
936 uctx->len = ctx_size;
937 uctx->ctx_doi = s->ctx_doi;
938 uctx->ctx_alg = s->ctx_alg;
939 uctx->ctx_len = s->ctx_len;
940 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
945 static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
947 struct xfrm_user_offload *xuo;
950 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
954 xuo = nla_data(attr);
955 memset(xuo, 0, sizeof(*xuo));
956 xuo->ifindex = xso->dev->ifindex;
957 if (xso->dir == XFRM_DEV_OFFLOAD_IN)
958 xuo->flags = XFRM_OFFLOAD_INBOUND;
959 if (xso->type == XFRM_DEV_OFFLOAD_PACKET)
960 xuo->flags |= XFRM_OFFLOAD_PACKET;
965 static bool xfrm_redact(void)
967 return IS_ENABLED(CONFIG_SECURITY) &&
968 security_locked_down(LOCKDOWN_XFRM_SECRET);
971 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
973 struct xfrm_algo *algo;
974 struct xfrm_algo_auth *ap;
976 bool redact_secret = xfrm_redact();
978 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
979 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
982 algo = nla_data(nla);
983 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
985 if (redact_secret && auth->alg_key_len)
986 memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8);
988 memcpy(algo->alg_key, auth->alg_key,
989 (auth->alg_key_len + 7) / 8);
990 algo->alg_key_len = auth->alg_key_len;
992 nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth));
996 memcpy(ap, auth, sizeof(struct xfrm_algo_auth));
997 if (redact_secret && auth->alg_key_len)
998 memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8);
1000 memcpy(ap->alg_key, auth->alg_key,
1001 (auth->alg_key_len + 7) / 8);
1005 static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb)
1007 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead));
1008 struct xfrm_algo_aead *ap;
1009 bool redact_secret = xfrm_redact();
1015 memcpy(ap, aead, sizeof(*aead));
1017 if (redact_secret && aead->alg_key_len)
1018 memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8);
1020 memcpy(ap->alg_key, aead->alg_key,
1021 (aead->alg_key_len + 7) / 8);
1025 static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
1027 struct xfrm_algo *ap;
1028 bool redact_secret = xfrm_redact();
1029 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT,
1030 xfrm_alg_len(ealg));
1035 memcpy(ap, ealg, sizeof(*ealg));
1037 if (redact_secret && ealg->alg_key_len)
1038 memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8);
1040 memcpy(ap->alg_key, ealg->alg_key,
1041 (ealg->alg_key_len + 7) / 8);
1046 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
1051 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
1053 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
1058 /* Don't change this without updating xfrm_sa_len! */
1059 static int copy_to_user_state_extra(struct xfrm_state *x,
1060 struct xfrm_usersa_info *p,
1061 struct sk_buff *skb)
1065 copy_to_user_state(x, p);
1067 if (x->props.extra_flags) {
1068 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
1069 x->props.extra_flags);
1075 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
1080 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
1086 ret = copy_to_user_aead(x->aead, skb);
1091 ret = copy_to_user_auth(x->aalg, skb);
1096 ret = copy_to_user_ealg(x->ealg, skb);
1101 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1106 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1111 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
1115 ret = xfrm_mark_put(skb, &x->mark);
1119 ret = xfrm_smark_put(skb, &x->props.smark);
1124 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1125 xfrm_replay_state_esn_len(x->replay_esn),
1128 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1133 ret = copy_user_offload(&x->xso, skb);
1137 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
1142 ret = copy_sec_ctx(x->security, skb);
1146 if (x->mapping_maxage)
1147 ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage);
1152 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
1154 struct xfrm_dump_info *sp = ptr;
1155 struct sk_buff *in_skb = sp->in_skb;
1156 struct sk_buff *skb = sp->out_skb;
1157 struct xfrm_translator *xtr;
1158 struct xfrm_usersa_info *p;
1159 struct nlmsghdr *nlh;
1162 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1163 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
1167 p = nlmsg_data(nlh);
1169 err = copy_to_user_state_extra(x, p, skb);
1171 nlmsg_cancel(skb, nlh);
1174 nlmsg_end(skb, nlh);
1176 xtr = xfrm_get_translator();
1178 err = xtr->alloc_compat(skb, nlh);
1180 xfrm_put_translator(xtr);
1182 nlmsg_cancel(skb, nlh);
1190 static int xfrm_dump_sa_done(struct netlink_callback *cb)
1192 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1193 struct sock *sk = cb->skb->sk;
1194 struct net *net = sock_net(sk);
1197 xfrm_state_walk_done(walk, net);
1201 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1203 struct net *net = sock_net(skb->sk);
1204 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1205 struct xfrm_dump_info info;
1207 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1208 sizeof(cb->args) - sizeof(cb->args[0]));
1210 info.in_skb = cb->skb;
1212 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1213 info.nlmsg_flags = NLM_F_MULTI;
1216 struct nlattr *attrs[XFRMA_MAX+1];
1217 struct xfrm_address_filter *filter = NULL;
1221 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1222 xfrma_policy, cb->extack);
1226 if (attrs[XFRMA_ADDRESS_FILTER]) {
1227 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1228 sizeof(*filter), GFP_KERNEL);
1233 if (attrs[XFRMA_PROTO])
1234 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1236 xfrm_state_walk_init(walk, proto, filter);
1240 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1245 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1246 struct xfrm_state *x, u32 seq)
1248 struct xfrm_dump_info info;
1249 struct sk_buff *skb;
1252 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1254 return ERR_PTR(-ENOMEM);
1256 info.in_skb = in_skb;
1258 info.nlmsg_seq = seq;
1259 info.nlmsg_flags = 0;
1261 err = dump_one_state(x, 0, &info);
1264 return ERR_PTR(err);
1270 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1271 * Must be called with RCU read lock.
1273 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1274 u32 pid, unsigned int group)
1276 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1277 struct xfrm_translator *xtr;
1284 xtr = xfrm_get_translator();
1286 int err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1288 xfrm_put_translator(xtr);
1295 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1298 static inline unsigned int xfrm_spdinfo_msgsize(void)
1300 return NLMSG_ALIGN(4)
1301 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1302 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1303 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1304 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1307 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1308 u32 portid, u32 seq, u32 flags)
1310 struct xfrmk_spdinfo si;
1311 struct xfrmu_spdinfo spc;
1312 struct xfrmu_spdhinfo sph;
1313 struct xfrmu_spdhthresh spt4, spt6;
1314 struct nlmsghdr *nlh;
1319 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1320 if (nlh == NULL) /* shouldn't really happen ... */
1323 f = nlmsg_data(nlh);
1325 xfrm_spd_getinfo(net, &si);
1326 spc.incnt = si.incnt;
1327 spc.outcnt = si.outcnt;
1328 spc.fwdcnt = si.fwdcnt;
1329 spc.inscnt = si.inscnt;
1330 spc.outscnt = si.outscnt;
1331 spc.fwdscnt = si.fwdscnt;
1332 sph.spdhcnt = si.spdhcnt;
1333 sph.spdhmcnt = si.spdhmcnt;
1336 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1338 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1339 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1340 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1341 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1342 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1344 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1346 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1348 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1350 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1352 nlmsg_cancel(skb, nlh);
1356 nlmsg_end(skb, nlh);
1360 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1361 struct nlattr **attrs,
1362 struct netlink_ext_ack *extack)
1364 struct net *net = sock_net(skb->sk);
1365 struct xfrmu_spdhthresh *thresh4 = NULL;
1366 struct xfrmu_spdhthresh *thresh6 = NULL;
1368 /* selector prefixlen thresholds to hash policies */
1369 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1370 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1372 if (nla_len(rta) < sizeof(*thresh4)) {
1373 NL_SET_ERR_MSG(extack, "Invalid SPD_IPV4_HTHRESH attribute length");
1376 thresh4 = nla_data(rta);
1377 if (thresh4->lbits > 32 || thresh4->rbits > 32) {
1378 NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 32 for IPv4)");
1382 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1383 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1385 if (nla_len(rta) < sizeof(*thresh6)) {
1386 NL_SET_ERR_MSG(extack, "Invalid SPD_IPV6_HTHRESH attribute length");
1389 thresh6 = nla_data(rta);
1390 if (thresh6->lbits > 128 || thresh6->rbits > 128) {
1391 NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 128 for IPv6)");
1396 if (thresh4 || thresh6) {
1397 write_seqlock(&net->xfrm.policy_hthresh.lock);
1399 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1400 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1403 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1404 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1406 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1408 xfrm_policy_hash_rebuild(net);
1414 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1415 struct nlattr **attrs,
1416 struct netlink_ext_ack *extack)
1418 struct net *net = sock_net(skb->sk);
1419 struct sk_buff *r_skb;
1420 u32 *flags = nlmsg_data(nlh);
1421 u32 sportid = NETLINK_CB(skb).portid;
1422 u32 seq = nlh->nlmsg_seq;
1425 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1429 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1432 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1435 static inline unsigned int xfrm_sadinfo_msgsize(void)
1437 return NLMSG_ALIGN(4)
1438 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1439 + nla_total_size(4); /* XFRMA_SAD_CNT */
1442 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1443 u32 portid, u32 seq, u32 flags)
1445 struct xfrmk_sadinfo si;
1446 struct xfrmu_sadhinfo sh;
1447 struct nlmsghdr *nlh;
1451 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1452 if (nlh == NULL) /* shouldn't really happen ... */
1455 f = nlmsg_data(nlh);
1457 xfrm_sad_getinfo(net, &si);
1459 sh.sadhmcnt = si.sadhmcnt;
1460 sh.sadhcnt = si.sadhcnt;
1462 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1464 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1466 nlmsg_cancel(skb, nlh);
1470 nlmsg_end(skb, nlh);
1474 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1475 struct nlattr **attrs,
1476 struct netlink_ext_ack *extack)
1478 struct net *net = sock_net(skb->sk);
1479 struct sk_buff *r_skb;
1480 u32 *flags = nlmsg_data(nlh);
1481 u32 sportid = NETLINK_CB(skb).portid;
1482 u32 seq = nlh->nlmsg_seq;
1485 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1489 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1492 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1495 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1496 struct nlattr **attrs, struct netlink_ext_ack *extack)
1498 struct net *net = sock_net(skb->sk);
1499 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1500 struct xfrm_state *x;
1501 struct sk_buff *resp_skb;
1504 x = xfrm_user_state_lookup(net, p, attrs, &err);
1508 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1509 if (IS_ERR(resp_skb)) {
1510 err = PTR_ERR(resp_skb);
1512 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1519 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1520 struct nlattr **attrs,
1521 struct netlink_ext_ack *extack)
1523 struct net *net = sock_net(skb->sk);
1524 struct xfrm_state *x;
1525 struct xfrm_userspi_info *p;
1526 struct xfrm_translator *xtr;
1527 struct sk_buff *resp_skb;
1528 xfrm_address_t *daddr;
1535 p = nlmsg_data(nlh);
1536 err = verify_spi_info(p->info.id.proto, p->min, p->max, extack);
1540 family = p->info.family;
1541 daddr = &p->info.id.daddr;
1545 mark = xfrm_mark_get(attrs, &m);
1547 if (attrs[XFRMA_IF_ID])
1548 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1551 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1552 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1559 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1560 if_id, p->info.id.proto, daddr,
1565 NL_SET_ERR_MSG(extack, "Target ACQUIRE not found");
1569 err = xfrm_alloc_spi(x, p->min, p->max, extack);
1573 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1574 if (IS_ERR(resp_skb)) {
1575 err = PTR_ERR(resp_skb);
1579 xtr = xfrm_get_translator();
1581 err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1583 xfrm_put_translator(xtr);
1585 kfree_skb(resp_skb);
1590 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1598 static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack)
1601 case XFRM_POLICY_IN:
1602 case XFRM_POLICY_OUT:
1603 case XFRM_POLICY_FWD:
1607 NL_SET_ERR_MSG(extack, "Invalid policy direction");
1614 static int verify_policy_type(u8 type, struct netlink_ext_ack *extack)
1617 case XFRM_POLICY_TYPE_MAIN:
1618 #ifdef CONFIG_XFRM_SUB_POLICY
1619 case XFRM_POLICY_TYPE_SUB:
1624 NL_SET_ERR_MSG(extack, "Invalid policy type");
1631 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p,
1632 struct netlink_ext_ack *extack)
1637 case XFRM_SHARE_ANY:
1638 case XFRM_SHARE_SESSION:
1639 case XFRM_SHARE_USER:
1640 case XFRM_SHARE_UNIQUE:
1644 NL_SET_ERR_MSG(extack, "Invalid policy share");
1648 switch (p->action) {
1649 case XFRM_POLICY_ALLOW:
1650 case XFRM_POLICY_BLOCK:
1654 NL_SET_ERR_MSG(extack, "Invalid policy action");
1658 switch (p->sel.family) {
1660 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
1661 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
1668 #if IS_ENABLED(CONFIG_IPV6)
1669 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
1670 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
1676 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
1677 return -EAFNOSUPPORT;
1681 NL_SET_ERR_MSG(extack, "Invalid selector family");
1685 ret = verify_policy_dir(p->dir, extack);
1688 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) {
1689 NL_SET_ERR_MSG(extack, "Policy index doesn't match direction");
1696 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1698 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1699 struct xfrm_user_sec_ctx *uctx;
1704 uctx = nla_data(rt);
1705 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1708 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1714 for (i = 0; i < nr; i++, ut++) {
1715 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1717 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1718 memcpy(&t->saddr, &ut->saddr,
1719 sizeof(xfrm_address_t));
1720 t->reqid = ut->reqid;
1722 t->share = ut->share;
1723 t->optional = ut->optional;
1724 t->aalgos = ut->aalgos;
1725 t->ealgos = ut->ealgos;
1726 t->calgos = ut->calgos;
1727 /* If all masks are ~0, then we allow all algorithms. */
1728 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1729 t->encap_family = ut->family;
1733 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,
1734 struct netlink_ext_ack *extack)
1739 if (nr > XFRM_MAX_DEPTH) {
1740 NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")");
1744 prev_family = family;
1746 for (i = 0; i < nr; i++) {
1747 /* We never validated the ut->family value, so many
1748 * applications simply leave it at zero. The check was
1749 * never made and ut->family was ignored because all
1750 * templates could be assumed to have the same family as
1751 * the policy itself. Now that we will have ipv4-in-ipv6
1752 * and ipv6-in-ipv4 tunnels, this is no longer true.
1755 ut[i].family = family;
1757 switch (ut[i].mode) {
1758 case XFRM_MODE_TUNNEL:
1759 case XFRM_MODE_BEET:
1762 if (ut[i].family != prev_family) {
1763 NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change");
1768 if (ut[i].mode >= XFRM_MODE_MAX) {
1769 NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")");
1773 prev_family = ut[i].family;
1775 switch (ut[i].family) {
1778 #if IS_ENABLED(CONFIG_IPV6)
1783 NL_SET_ERR_MSG(extack, "Invalid family in template");
1787 if (!xfrm_id_proto_valid(ut[i].id.proto)) {
1788 NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template");
1796 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs,
1797 struct netlink_ext_ack *extack)
1799 struct nlattr *rt = attrs[XFRMA_TMPL];
1804 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1805 int nr = nla_len(rt) / sizeof(*utmpl);
1808 err = validate_tmpl(nr, utmpl, pol->family, extack);
1812 copy_templates(pol, utmpl, nr);
1817 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs,
1818 struct netlink_ext_ack *extack)
1820 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1821 struct xfrm_userpolicy_type *upt;
1822 u8 type = XFRM_POLICY_TYPE_MAIN;
1830 err = verify_policy_type(type, extack);
1838 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1840 xp->priority = p->priority;
1841 xp->index = p->index;
1842 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1843 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1844 xp->action = p->action;
1845 xp->flags = p->flags;
1846 xp->family = p->sel.family;
1847 /* XXX xp->share = p->share; */
1850 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1852 memset(p, 0, sizeof(*p));
1853 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1854 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1855 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1856 p->priority = xp->priority;
1857 p->index = xp->index;
1858 p->sel.family = xp->family;
1860 p->action = xp->action;
1861 p->flags = xp->flags;
1862 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1865 static struct xfrm_policy *xfrm_policy_construct(struct net *net,
1866 struct xfrm_userpolicy_info *p,
1867 struct nlattr **attrs,
1869 struct netlink_ext_ack *extack)
1871 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1879 copy_from_user_policy(xp, p);
1881 err = copy_from_user_policy_type(&xp->type, attrs, extack);
1885 if (!(err = copy_from_user_tmpl(xp, attrs, extack)))
1886 err = copy_from_user_sec_ctx(xp, attrs);
1890 xfrm_mark_get(attrs, &xp->mark);
1892 if (attrs[XFRMA_IF_ID])
1893 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1895 /* configure the hardware if offload is requested */
1896 if (attrs[XFRMA_OFFLOAD_DEV]) {
1897 err = xfrm_dev_policy_add(net, xp,
1898 nla_data(attrs[XFRMA_OFFLOAD_DEV]),
1908 xfrm_policy_destroy(xp);
1912 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1913 struct nlattr **attrs,
1914 struct netlink_ext_ack *extack)
1916 struct net *net = sock_net(skb->sk);
1917 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1918 struct xfrm_policy *xp;
1923 err = verify_newpolicy_info(p, extack);
1926 err = verify_sec_ctx_len(attrs, extack);
1930 xp = xfrm_policy_construct(net, p, attrs, &err, extack);
1934 /* shouldn't excl be based on nlh flags??
1935 * Aha! this is anti-netlink really i.e more pfkey derived
1936 * in netlink excl is a flag and you wouldn't need
1937 * a type XFRM_MSG_UPDPOLICY - JHS */
1938 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1939 err = xfrm_policy_insert(p->dir, xp, excl);
1940 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
1943 xfrm_dev_policy_delete(xp);
1944 security_xfrm_policy_free(xp->security);
1949 c.event = nlh->nlmsg_type;
1950 c.seq = nlh->nlmsg_seq;
1951 c.portid = nlh->nlmsg_pid;
1952 km_policy_notify(xp, p->dir, &c);
1959 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1961 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1964 if (xp->xfrm_nr == 0)
1967 for (i = 0; i < xp->xfrm_nr; i++) {
1968 struct xfrm_user_tmpl *up = &vec[i];
1969 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1971 memset(up, 0, sizeof(*up));
1972 memcpy(&up->id, &kp->id, sizeof(up->id));
1973 up->family = kp->encap_family;
1974 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1975 up->reqid = kp->reqid;
1976 up->mode = kp->mode;
1977 up->share = kp->share;
1978 up->optional = kp->optional;
1979 up->aalgos = kp->aalgos;
1980 up->ealgos = kp->ealgos;
1981 up->calgos = kp->calgos;
1984 return nla_put(skb, XFRMA_TMPL,
1985 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1988 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1991 return copy_sec_ctx(x->security, skb);
1996 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1999 return copy_sec_ctx(xp->security, skb);
2002 static inline unsigned int userpolicy_type_attrsize(void)
2004 #ifdef CONFIG_XFRM_SUB_POLICY
2005 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
2011 #ifdef CONFIG_XFRM_SUB_POLICY
2012 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
2014 struct xfrm_userpolicy_type upt;
2016 /* Sadly there are two holes in struct xfrm_userpolicy_type */
2017 memset(&upt, 0, sizeof(upt));
2020 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
2024 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
2030 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
2032 struct xfrm_dump_info *sp = ptr;
2033 struct xfrm_userpolicy_info *p;
2034 struct sk_buff *in_skb = sp->in_skb;
2035 struct sk_buff *skb = sp->out_skb;
2036 struct xfrm_translator *xtr;
2037 struct nlmsghdr *nlh;
2040 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
2041 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
2045 p = nlmsg_data(nlh);
2046 copy_to_user_policy(xp, p, dir);
2047 err = copy_to_user_tmpl(xp, skb);
2049 err = copy_to_user_sec_ctx(xp, skb);
2051 err = copy_to_user_policy_type(xp->type, skb);
2053 err = xfrm_mark_put(skb, &xp->mark);
2055 err = xfrm_if_id_put(skb, xp->if_id);
2056 if (!err && xp->xdo.dev)
2057 err = copy_user_offload(&xp->xdo, skb);
2059 nlmsg_cancel(skb, nlh);
2062 nlmsg_end(skb, nlh);
2064 xtr = xfrm_get_translator();
2066 err = xtr->alloc_compat(skb, nlh);
2068 xfrm_put_translator(xtr);
2070 nlmsg_cancel(skb, nlh);
2078 static int xfrm_dump_policy_done(struct netlink_callback *cb)
2080 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2081 struct net *net = sock_net(cb->skb->sk);
2083 xfrm_policy_walk_done(walk, net);
2087 static int xfrm_dump_policy_start(struct netlink_callback *cb)
2089 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2091 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
2093 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
2097 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
2099 struct net *net = sock_net(skb->sk);
2100 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2101 struct xfrm_dump_info info;
2103 info.in_skb = cb->skb;
2105 info.nlmsg_seq = cb->nlh->nlmsg_seq;
2106 info.nlmsg_flags = NLM_F_MULTI;
2108 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
2113 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
2114 struct xfrm_policy *xp,
2117 struct xfrm_dump_info info;
2118 struct sk_buff *skb;
2121 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2123 return ERR_PTR(-ENOMEM);
2125 info.in_skb = in_skb;
2127 info.nlmsg_seq = seq;
2128 info.nlmsg_flags = 0;
2130 err = dump_one_policy(xp, dir, 0, &info);
2133 return ERR_PTR(err);
2139 static int xfrm_notify_userpolicy(struct net *net)
2141 struct xfrm_userpolicy_default *up;
2142 int len = NLMSG_ALIGN(sizeof(*up));
2143 struct nlmsghdr *nlh;
2144 struct sk_buff *skb;
2147 skb = nlmsg_new(len, GFP_ATOMIC);
2151 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0);
2157 up = nlmsg_data(nlh);
2158 up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
2159 up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
2160 up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
2162 nlmsg_end(skb, nlh);
2165 err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
2171 static bool xfrm_userpolicy_is_valid(__u8 policy)
2173 return policy == XFRM_USERPOLICY_BLOCK ||
2174 policy == XFRM_USERPOLICY_ACCEPT;
2177 static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2178 struct nlattr **attrs, struct netlink_ext_ack *extack)
2180 struct net *net = sock_net(skb->sk);
2181 struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
2183 if (xfrm_userpolicy_is_valid(up->in))
2184 net->xfrm.policy_default[XFRM_POLICY_IN] = up->in;
2186 if (xfrm_userpolicy_is_valid(up->fwd))
2187 net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd;
2189 if (xfrm_userpolicy_is_valid(up->out))
2190 net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out;
2192 rt_genid_bump_all(net);
2194 xfrm_notify_userpolicy(net);
2198 static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2199 struct nlattr **attrs, struct netlink_ext_ack *extack)
2201 struct sk_buff *r_skb;
2202 struct nlmsghdr *r_nlh;
2203 struct net *net = sock_net(skb->sk);
2204 struct xfrm_userpolicy_default *r_up;
2205 int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default));
2206 u32 portid = NETLINK_CB(skb).portid;
2207 u32 seq = nlh->nlmsg_seq;
2209 r_skb = nlmsg_new(len, GFP_ATOMIC);
2213 r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0);
2219 r_up = nlmsg_data(r_nlh);
2220 r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
2221 r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
2222 r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
2223 nlmsg_end(r_skb, r_nlh);
2225 return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid);
2228 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2229 struct nlattr **attrs,
2230 struct netlink_ext_ack *extack)
2232 struct net *net = sock_net(skb->sk);
2233 struct xfrm_policy *xp;
2234 struct xfrm_userpolicy_id *p;
2235 u8 type = XFRM_POLICY_TYPE_MAIN;
2242 p = nlmsg_data(nlh);
2243 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
2245 err = copy_from_user_policy_type(&type, attrs, extack);
2249 err = verify_policy_dir(p->dir, extack);
2253 if (attrs[XFRMA_IF_ID])
2254 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2256 xfrm_mark_get(attrs, &m);
2259 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir,
2260 p->index, delete, &err);
2262 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2263 struct xfrm_sec_ctx *ctx;
2265 err = verify_sec_ctx_len(attrs, extack);
2271 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2273 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2277 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2278 &p->sel, ctx, delete, &err);
2279 security_xfrm_policy_free(ctx);
2285 struct sk_buff *resp_skb;
2287 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
2288 if (IS_ERR(resp_skb)) {
2289 err = PTR_ERR(resp_skb);
2291 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
2292 NETLINK_CB(skb).portid);
2295 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2300 c.data.byid = p->index;
2301 c.event = nlh->nlmsg_type;
2302 c.seq = nlh->nlmsg_seq;
2303 c.portid = nlh->nlmsg_pid;
2304 km_policy_notify(xp, p->dir, &c);
2312 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
2313 struct nlattr **attrs,
2314 struct netlink_ext_ack *extack)
2316 struct net *net = sock_net(skb->sk);
2318 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
2321 err = xfrm_state_flush(net, p->proto, true, false);
2323 if (err == -ESRCH) /* empty table */
2327 c.data.proto = p->proto;
2328 c.event = nlh->nlmsg_type;
2329 c.seq = nlh->nlmsg_seq;
2330 c.portid = nlh->nlmsg_pid;
2332 km_state_notify(NULL, &c);
2337 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
2339 unsigned int replay_size = x->replay_esn ?
2340 xfrm_replay_state_esn_len(x->replay_esn) :
2341 sizeof(struct xfrm_replay_state);
2343 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
2344 + nla_total_size(replay_size)
2345 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
2346 + nla_total_size(sizeof(struct xfrm_mark))
2347 + nla_total_size(4) /* XFRM_AE_RTHR */
2348 + nla_total_size(4); /* XFRM_AE_ETHR */
2351 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2353 struct xfrm_aevent_id *id;
2354 struct nlmsghdr *nlh;
2357 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
2361 id = nlmsg_data(nlh);
2362 memset(&id->sa_id, 0, sizeof(id->sa_id));
2363 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
2364 id->sa_id.spi = x->id.spi;
2365 id->sa_id.family = x->props.family;
2366 id->sa_id.proto = x->id.proto;
2367 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2368 id->reqid = x->props.reqid;
2369 id->flags = c->data.aevent;
2371 if (x->replay_esn) {
2372 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
2373 xfrm_replay_state_esn_len(x->replay_esn),
2376 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
2381 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2386 if (id->flags & XFRM_AE_RTHR) {
2387 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2391 if (id->flags & XFRM_AE_ETHR) {
2392 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2393 x->replay_maxage * 10 / HZ);
2397 err = xfrm_mark_put(skb, &x->mark);
2401 err = xfrm_if_id_put(skb, x->if_id);
2405 nlmsg_end(skb, nlh);
2409 nlmsg_cancel(skb, nlh);
2413 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2414 struct nlattr **attrs, struct netlink_ext_ack *extack)
2416 struct net *net = sock_net(skb->sk);
2417 struct xfrm_state *x;
2418 struct sk_buff *r_skb;
2423 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2424 struct xfrm_usersa_id *id = &p->sa_id;
2426 mark = xfrm_mark_get(attrs, &m);
2428 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2432 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2433 if (r_skb == NULL) {
2439 * XXX: is this lock really needed - none of the other
2440 * gets lock (the concern is things getting updated
2441 * while we are still reading) - jhs
2443 spin_lock_bh(&x->lock);
2444 c.data.aevent = p->flags;
2445 c.seq = nlh->nlmsg_seq;
2446 c.portid = nlh->nlmsg_pid;
2448 err = build_aevent(r_skb, x, &c);
2451 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2452 spin_unlock_bh(&x->lock);
2457 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2458 struct nlattr **attrs, struct netlink_ext_ack *extack)
2460 struct net *net = sock_net(skb->sk);
2461 struct xfrm_state *x;
2466 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2467 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2468 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2469 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2470 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2471 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2473 if (!lt && !rp && !re && !et && !rt) {
2474 NL_SET_ERR_MSG(extack, "Missing required attribute for AE");
2478 /* pedantic mode - thou shalt sayeth replaceth */
2479 if (!(nlh->nlmsg_flags & NLM_F_REPLACE)) {
2480 NL_SET_ERR_MSG(extack, "NLM_F_REPLACE flag is required");
2484 mark = xfrm_mark_get(attrs, &m);
2486 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2490 if (x->km.state != XFRM_STATE_VALID) {
2491 NL_SET_ERR_MSG(extack, "SA must be in VALID state");
2495 err = xfrm_replay_verify_len(x->replay_esn, re, extack);
2499 spin_lock_bh(&x->lock);
2500 xfrm_update_ae_params(x, attrs, 1);
2501 spin_unlock_bh(&x->lock);
2503 c.event = nlh->nlmsg_type;
2504 c.seq = nlh->nlmsg_seq;
2505 c.portid = nlh->nlmsg_pid;
2506 c.data.aevent = XFRM_AE_CU;
2507 km_state_notify(x, &c);
2514 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2515 struct nlattr **attrs,
2516 struct netlink_ext_ack *extack)
2518 struct net *net = sock_net(skb->sk);
2520 u8 type = XFRM_POLICY_TYPE_MAIN;
2523 err = copy_from_user_policy_type(&type, attrs, extack);
2527 err = xfrm_policy_flush(net, type, true);
2529 if (err == -ESRCH) /* empty table */
2535 c.event = nlh->nlmsg_type;
2536 c.seq = nlh->nlmsg_seq;
2537 c.portid = nlh->nlmsg_pid;
2539 km_policy_notify(NULL, 0, &c);
2543 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2544 struct nlattr **attrs,
2545 struct netlink_ext_ack *extack)
2547 struct net *net = sock_net(skb->sk);
2548 struct xfrm_policy *xp;
2549 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2550 struct xfrm_userpolicy_info *p = &up->pol;
2551 u8 type = XFRM_POLICY_TYPE_MAIN;
2556 err = copy_from_user_policy_type(&type, attrs, extack);
2560 err = verify_policy_dir(p->dir, extack);
2564 if (attrs[XFRMA_IF_ID])
2565 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2567 xfrm_mark_get(attrs, &m);
2570 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index,
2573 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2574 struct xfrm_sec_ctx *ctx;
2576 err = verify_sec_ctx_len(attrs, extack);
2582 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2584 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2588 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2589 &p->sel, ctx, 0, &err);
2590 security_xfrm_policy_free(ctx);
2595 if (unlikely(xp->walk.dead))
2600 xfrm_policy_delete(xp, p->dir);
2601 xfrm_audit_policy_delete(xp, 1, true);
2603 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2610 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2611 struct nlattr **attrs,
2612 struct netlink_ext_ack *extack)
2614 struct net *net = sock_net(skb->sk);
2615 struct xfrm_state *x;
2617 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2618 struct xfrm_usersa_info *p = &ue->state;
2620 u32 mark = xfrm_mark_get(attrs, &m);
2622 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2628 spin_lock_bh(&x->lock);
2630 if (x->km.state != XFRM_STATE_VALID) {
2631 NL_SET_ERR_MSG(extack, "SA must be in VALID state");
2635 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2638 __xfrm_state_delete(x);
2639 xfrm_audit_state_delete(x, 1, true);
2643 spin_unlock_bh(&x->lock);
2648 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2649 struct nlattr **attrs,
2650 struct netlink_ext_ack *extack)
2652 struct net *net = sock_net(skb->sk);
2653 struct xfrm_policy *xp;
2654 struct xfrm_user_tmpl *ut;
2656 struct nlattr *rt = attrs[XFRMA_TMPL];
2657 struct xfrm_mark mark;
2659 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2660 struct xfrm_state *x = xfrm_state_alloc(net);
2666 xfrm_mark_get(attrs, &mark);
2668 err = verify_newpolicy_info(&ua->policy, extack);
2671 err = verify_sec_ctx_len(attrs, extack);
2676 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack);
2680 memcpy(&x->id, &ua->id, sizeof(ua->id));
2681 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2682 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2683 xp->mark.m = x->mark.m = mark.m;
2684 xp->mark.v = x->mark.v = mark.v;
2686 /* extract the templates and for each call km_key */
2687 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2688 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2689 memcpy(&x->id, &t->id, sizeof(x->id));
2690 x->props.mode = t->mode;
2691 x->props.reqid = t->reqid;
2692 x->props.family = ut->family;
2693 t->aalgos = ua->aalgos;
2694 t->ealgos = ua->ealgos;
2695 t->calgos = ua->calgos;
2696 err = km_query(x, t, xp);
2711 #ifdef CONFIG_XFRM_MIGRATE
2712 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2713 struct xfrm_kmaddress *k,
2714 struct nlattr **attrs, int *num,
2715 struct netlink_ext_ack *extack)
2717 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2718 struct xfrm_user_migrate *um;
2722 struct xfrm_user_kmaddress *uk;
2724 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2725 memcpy(&k->local, &uk->local, sizeof(k->local));
2726 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2727 k->family = uk->family;
2728 k->reserved = uk->reserved;
2732 num_migrate = nla_len(rt) / sizeof(*um);
2734 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) {
2735 NL_SET_ERR_MSG(extack, "Invalid number of SAs to migrate, must be 0 < num <= XFRM_MAX_DEPTH (6)");
2739 for (i = 0; i < num_migrate; i++, um++, ma++) {
2740 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2741 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2742 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2743 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2745 ma->proto = um->proto;
2746 ma->mode = um->mode;
2747 ma->reqid = um->reqid;
2749 ma->old_family = um->old_family;
2750 ma->new_family = um->new_family;
2757 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2758 struct nlattr **attrs, struct netlink_ext_ack *extack)
2760 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2761 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2762 struct xfrm_kmaddress km, *kmp;
2766 struct net *net = sock_net(skb->sk);
2767 struct xfrm_encap_tmpl *encap = NULL;
2770 if (!attrs[XFRMA_MIGRATE]) {
2771 NL_SET_ERR_MSG(extack, "Missing required MIGRATE attribute");
2775 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2777 err = copy_from_user_policy_type(&type, attrs, extack);
2781 err = copy_from_user_migrate(m, kmp, attrs, &n, extack);
2788 if (attrs[XFRMA_ENCAP]) {
2789 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2790 sizeof(*encap), GFP_KERNEL);
2795 if (attrs[XFRMA_IF_ID])
2796 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2798 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap,
2806 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2807 struct nlattr **attrs, struct netlink_ext_ack *extack)
2809 return -ENOPROTOOPT;
2813 #ifdef CONFIG_XFRM_MIGRATE
2814 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2816 struct xfrm_user_migrate um;
2818 memset(&um, 0, sizeof(um));
2819 um.proto = m->proto;
2821 um.reqid = m->reqid;
2822 um.old_family = m->old_family;
2823 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2824 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2825 um.new_family = m->new_family;
2826 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2827 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2829 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2832 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2834 struct xfrm_user_kmaddress uk;
2836 memset(&uk, 0, sizeof(uk));
2837 uk.family = k->family;
2838 uk.reserved = k->reserved;
2839 memcpy(&uk.local, &k->local, sizeof(uk.local));
2840 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2842 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2845 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2848 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2849 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2850 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
2851 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2852 + userpolicy_type_attrsize();
2855 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2856 int num_migrate, const struct xfrm_kmaddress *k,
2857 const struct xfrm_selector *sel,
2858 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
2860 const struct xfrm_migrate *mp;
2861 struct xfrm_userpolicy_id *pol_id;
2862 struct nlmsghdr *nlh;
2865 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2869 pol_id = nlmsg_data(nlh);
2870 /* copy data from selector, dir, and type to the pol_id */
2871 memset(pol_id, 0, sizeof(*pol_id));
2872 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2876 err = copy_to_user_kmaddress(k, skb);
2881 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2885 err = copy_to_user_policy_type(type, skb);
2888 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2889 err = copy_to_user_migrate(mp, skb);
2894 nlmsg_end(skb, nlh);
2898 nlmsg_cancel(skb, nlh);
2902 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2903 const struct xfrm_migrate *m, int num_migrate,
2904 const struct xfrm_kmaddress *k,
2905 const struct xfrm_encap_tmpl *encap)
2907 struct net *net = &init_net;
2908 struct sk_buff *skb;
2911 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2917 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2920 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
2923 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2924 const struct xfrm_migrate *m, int num_migrate,
2925 const struct xfrm_kmaddress *k,
2926 const struct xfrm_encap_tmpl *encap)
2928 return -ENOPROTOOPT;
2932 #define XMSGSIZE(type) sizeof(struct type)
2934 const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2935 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2936 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2937 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2938 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2939 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2940 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2941 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2942 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2943 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2944 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2945 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2946 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2947 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2948 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2949 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2950 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2951 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2952 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2953 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2954 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2955 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2956 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
2957 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
2959 EXPORT_SYMBOL_GPL(xfrm_msg_min);
2963 const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2964 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2965 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2966 [XFRMA_LASTUSED] = { .type = NLA_U64},
2967 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2968 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2969 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2970 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2971 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2972 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2973 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2974 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2975 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2976 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2977 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2978 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2979 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2980 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2981 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2982 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2983 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2984 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2985 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2986 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2987 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2988 [XFRMA_PROTO] = { .type = NLA_U8 },
2989 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
2990 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
2991 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2992 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
2993 [XFRMA_IF_ID] = { .type = NLA_U32 },
2995 EXPORT_SYMBOL_GPL(xfrma_policy);
2997 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2998 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2999 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
3002 static const struct xfrm_link {
3003 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **,
3004 struct netlink_ext_ack *);
3005 int (*start)(struct netlink_callback *);
3006 int (*dump)(struct sk_buff *, struct netlink_callback *);
3007 int (*done)(struct netlink_callback *);
3008 const struct nla_policy *nla_pol;
3010 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
3011 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
3012 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
3013 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
3014 .dump = xfrm_dump_sa,
3015 .done = xfrm_dump_sa_done },
3016 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
3017 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
3018 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
3019 .start = xfrm_dump_policy_start,
3020 .dump = xfrm_dump_policy,
3021 .done = xfrm_dump_policy_done },
3022 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
3023 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
3024 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
3025 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
3026 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
3027 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
3028 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
3029 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
3030 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
3031 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
3032 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
3033 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
3034 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
3035 .nla_pol = xfrma_spd_policy,
3036 .nla_max = XFRMA_SPD_MAX },
3037 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
3038 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default },
3039 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default },
3042 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
3043 struct netlink_ext_ack *extack)
3045 struct net *net = sock_net(skb->sk);
3046 struct nlattr *attrs[XFRMA_MAX+1];
3047 const struct xfrm_link *link;
3048 struct nlmsghdr *nlh64 = NULL;
3051 type = nlh->nlmsg_type;
3052 if (type > XFRM_MSG_MAX)
3055 type -= XFRM_MSG_BASE;
3056 link = &xfrm_dispatch[type];
3058 /* All operations require privileges, even GET */
3059 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
3062 if (in_compat_syscall()) {
3063 struct xfrm_translator *xtr = xfrm_get_translator();
3068 nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max,
3069 link->nla_pol, extack);
3070 xfrm_put_translator(xtr);
3072 return PTR_ERR(nlh64);
3077 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
3078 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
3079 (nlh->nlmsg_flags & NLM_F_DUMP)) {
3080 struct netlink_dump_control c = {
3081 .start = link->start,
3086 if (link->dump == NULL) {
3091 err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
3095 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
3096 link->nla_max ? : XFRMA_MAX,
3097 link->nla_pol ? : xfrma_policy, extack);
3101 if (link->doit == NULL) {
3106 err = link->doit(skb, nlh, attrs, extack);
3108 /* We need to free skb allocated in xfrm_alloc_compat() before
3109 * returning from this function, because consume_skb() won't take
3110 * care of frag_list since netlink destructor sets
3111 * sbk->head to NULL. (see netlink_skb_destructor())
3113 if (skb_has_frag_list(skb)) {
3114 kfree_skb(skb_shinfo(skb)->frag_list);
3115 skb_shinfo(skb)->frag_list = NULL;
3123 static void xfrm_netlink_rcv(struct sk_buff *skb)
3125 struct net *net = sock_net(skb->sk);
3127 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3128 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
3129 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3132 static inline unsigned int xfrm_expire_msgsize(void)
3134 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
3135 + nla_total_size(sizeof(struct xfrm_mark));
3138 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
3140 struct xfrm_user_expire *ue;
3141 struct nlmsghdr *nlh;
3144 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
3148 ue = nlmsg_data(nlh);
3149 copy_to_user_state(x, &ue->state);
3150 ue->hard = (c->data.hard != 0) ? 1 : 0;
3151 /* clear the padding bytes */
3152 memset_after(ue, 0, hard);
3154 err = xfrm_mark_put(skb, &x->mark);
3158 err = xfrm_if_id_put(skb, x->if_id);
3162 nlmsg_end(skb, nlh);
3166 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
3168 struct net *net = xs_net(x);
3169 struct sk_buff *skb;
3171 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
3175 if (build_expire(skb, x, c) < 0) {
3180 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3183 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
3185 struct net *net = xs_net(x);
3186 struct sk_buff *skb;
3189 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
3193 err = build_aevent(skb, x, c);
3196 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
3199 static int xfrm_notify_sa_flush(const struct km_event *c)
3201 struct net *net = c->net;
3202 struct xfrm_usersa_flush *p;
3203 struct nlmsghdr *nlh;
3204 struct sk_buff *skb;
3205 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
3207 skb = nlmsg_new(len, GFP_ATOMIC);
3211 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
3217 p = nlmsg_data(nlh);
3218 p->proto = c->data.proto;
3220 nlmsg_end(skb, nlh);
3222 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3225 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
3229 l += nla_total_size(aead_len(x->aead));
3231 l += nla_total_size(sizeof(struct xfrm_algo) +
3232 (x->aalg->alg_key_len + 7) / 8);
3233 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
3236 l += nla_total_size(xfrm_alg_len(x->ealg));
3238 l += nla_total_size(sizeof(*x->calg));
3240 l += nla_total_size(sizeof(*x->encap));
3242 l += nla_total_size(sizeof(x->tfcpad));
3244 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
3246 l += nla_total_size(sizeof(struct xfrm_replay_state));
3248 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
3249 x->security->ctx_len);
3251 l += nla_total_size(sizeof(*x->coaddr));
3252 if (x->props.extra_flags)
3253 l += nla_total_size(sizeof(x->props.extra_flags));
3255 l += nla_total_size(sizeof(struct xfrm_user_offload));
3256 if (x->props.smark.v | x->props.smark.m) {
3257 l += nla_total_size(sizeof(x->props.smark.v));
3258 l += nla_total_size(sizeof(x->props.smark.m));
3261 l += nla_total_size(sizeof(x->if_id));
3263 /* Must count x->lastused as it may become non-zero behind our back. */
3264 l += nla_total_size_64bit(sizeof(u64));
3266 if (x->mapping_maxage)
3267 l += nla_total_size(sizeof(x->mapping_maxage));
3272 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
3274 struct net *net = xs_net(x);
3275 struct xfrm_usersa_info *p;
3276 struct xfrm_usersa_id *id;
3277 struct nlmsghdr *nlh;
3278 struct sk_buff *skb;
3279 unsigned int len = xfrm_sa_len(x);
3280 unsigned int headlen;
3283 headlen = sizeof(*p);
3284 if (c->event == XFRM_MSG_DELSA) {
3285 len += nla_total_size(headlen);
3286 headlen = sizeof(*id);
3287 len += nla_total_size(sizeof(struct xfrm_mark));
3289 len += NLMSG_ALIGN(headlen);
3291 skb = nlmsg_new(len, GFP_ATOMIC);
3295 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3300 p = nlmsg_data(nlh);
3301 if (c->event == XFRM_MSG_DELSA) {
3302 struct nlattr *attr;
3304 id = nlmsg_data(nlh);
3305 memset(id, 0, sizeof(*id));
3306 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
3307 id->spi = x->id.spi;
3308 id->family = x->props.family;
3309 id->proto = x->id.proto;
3311 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
3318 err = copy_to_user_state_extra(x, p, skb);
3322 nlmsg_end(skb, nlh);
3324 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3331 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
3335 case XFRM_MSG_EXPIRE:
3336 return xfrm_exp_state_notify(x, c);
3337 case XFRM_MSG_NEWAE:
3338 return xfrm_aevent_state_notify(x, c);
3339 case XFRM_MSG_DELSA:
3340 case XFRM_MSG_UPDSA:
3341 case XFRM_MSG_NEWSA:
3342 return xfrm_notify_sa(x, c);
3343 case XFRM_MSG_FLUSHSA:
3344 return xfrm_notify_sa_flush(c);
3346 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
3355 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
3356 struct xfrm_policy *xp)
3358 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
3359 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3360 + nla_total_size(sizeof(struct xfrm_mark))
3361 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
3362 + userpolicy_type_attrsize();
3365 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
3366 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
3368 __u32 seq = xfrm_get_acqseq();
3369 struct xfrm_user_acquire *ua;
3370 struct nlmsghdr *nlh;
3373 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
3377 ua = nlmsg_data(nlh);
3378 memcpy(&ua->id, &x->id, sizeof(ua->id));
3379 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
3380 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
3381 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
3382 ua->aalgos = xt->aalgos;
3383 ua->ealgos = xt->ealgos;
3384 ua->calgos = xt->calgos;
3385 ua->seq = x->km.seq = seq;
3387 err = copy_to_user_tmpl(xp, skb);
3389 err = copy_to_user_state_sec_ctx(x, skb);
3391 err = copy_to_user_policy_type(xp->type, skb);
3393 err = xfrm_mark_put(skb, &xp->mark);
3395 err = xfrm_if_id_put(skb, xp->if_id);
3396 if (!err && xp->xdo.dev)
3397 err = copy_user_offload(&xp->xdo, skb);
3399 nlmsg_cancel(skb, nlh);
3403 nlmsg_end(skb, nlh);
3407 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
3408 struct xfrm_policy *xp)
3410 struct net *net = xs_net(x);
3411 struct sk_buff *skb;
3414 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
3418 err = build_acquire(skb, x, xt, xp);
3421 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
3424 /* User gives us xfrm_user_policy_info followed by an array of 0
3425 * or more templates.
3427 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
3428 u8 *data, int len, int *dir)
3430 struct net *net = sock_net(sk);
3431 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
3432 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
3433 struct xfrm_policy *xp;
3436 switch (sk->sk_family) {
3438 if (opt != IP_XFRM_POLICY) {
3443 #if IS_ENABLED(CONFIG_IPV6)
3445 if (opt != IPV6_XFRM_POLICY) {
3458 if (len < sizeof(*p) ||
3459 verify_newpolicy_info(p, NULL))
3462 nr = ((len - sizeof(*p)) / sizeof(*ut));
3463 if (validate_tmpl(nr, ut, p->sel.family, NULL))
3466 if (p->dir > XFRM_POLICY_OUT)
3469 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3475 copy_from_user_policy(xp, p);
3476 xp->type = XFRM_POLICY_TYPE_MAIN;
3477 copy_templates(xp, ut, nr);
3484 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3486 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3487 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3488 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3489 + nla_total_size(sizeof(struct xfrm_mark))
3490 + userpolicy_type_attrsize();
3493 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3494 int dir, const struct km_event *c)
3496 struct xfrm_user_polexpire *upe;
3497 int hard = c->data.hard;
3498 struct nlmsghdr *nlh;
3501 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3505 upe = nlmsg_data(nlh);
3506 copy_to_user_policy(xp, &upe->pol, dir);
3507 err = copy_to_user_tmpl(xp, skb);
3509 err = copy_to_user_sec_ctx(xp, skb);
3511 err = copy_to_user_policy_type(xp->type, skb);
3513 err = xfrm_mark_put(skb, &xp->mark);
3515 err = xfrm_if_id_put(skb, xp->if_id);
3516 if (!err && xp->xdo.dev)
3517 err = copy_user_offload(&xp->xdo, skb);
3519 nlmsg_cancel(skb, nlh);
3524 nlmsg_end(skb, nlh);
3528 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3530 struct net *net = xp_net(xp);
3531 struct sk_buff *skb;
3534 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3538 err = build_polexpire(skb, xp, dir, c);
3541 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3544 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3546 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3547 struct net *net = xp_net(xp);
3548 struct xfrm_userpolicy_info *p;
3549 struct xfrm_userpolicy_id *id;
3550 struct nlmsghdr *nlh;
3551 struct sk_buff *skb;
3552 unsigned int headlen;
3555 headlen = sizeof(*p);
3556 if (c->event == XFRM_MSG_DELPOLICY) {
3557 len += nla_total_size(headlen);
3558 headlen = sizeof(*id);
3560 len += userpolicy_type_attrsize();
3561 len += nla_total_size(sizeof(struct xfrm_mark));
3562 len += NLMSG_ALIGN(headlen);
3564 skb = nlmsg_new(len, GFP_ATOMIC);
3568 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3573 p = nlmsg_data(nlh);
3574 if (c->event == XFRM_MSG_DELPOLICY) {
3575 struct nlattr *attr;
3577 id = nlmsg_data(nlh);
3578 memset(id, 0, sizeof(*id));
3581 id->index = xp->index;
3583 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3585 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3593 copy_to_user_policy(xp, p, dir);
3594 err = copy_to_user_tmpl(xp, skb);
3596 err = copy_to_user_policy_type(xp->type, skb);
3598 err = xfrm_mark_put(skb, &xp->mark);
3600 err = xfrm_if_id_put(skb, xp->if_id);
3601 if (!err && xp->xdo.dev)
3602 err = copy_user_offload(&xp->xdo, skb);
3606 nlmsg_end(skb, nlh);
3608 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3615 static int xfrm_notify_policy_flush(const struct km_event *c)
3617 struct net *net = c->net;
3618 struct nlmsghdr *nlh;
3619 struct sk_buff *skb;
3622 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3626 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3630 err = copy_to_user_policy_type(c->data.type, skb);
3634 nlmsg_end(skb, nlh);
3636 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3643 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3647 case XFRM_MSG_NEWPOLICY:
3648 case XFRM_MSG_UPDPOLICY:
3649 case XFRM_MSG_DELPOLICY:
3650 return xfrm_notify_policy(xp, dir, c);
3651 case XFRM_MSG_FLUSHPOLICY:
3652 return xfrm_notify_policy_flush(c);
3653 case XFRM_MSG_POLEXPIRE:
3654 return xfrm_exp_policy_notify(xp, dir, c);
3656 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3664 static inline unsigned int xfrm_report_msgsize(void)
3666 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3669 static int build_report(struct sk_buff *skb, u8 proto,
3670 struct xfrm_selector *sel, xfrm_address_t *addr)
3672 struct xfrm_user_report *ur;
3673 struct nlmsghdr *nlh;
3675 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3679 ur = nlmsg_data(nlh);
3681 memcpy(&ur->sel, sel, sizeof(ur->sel));
3684 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3686 nlmsg_cancel(skb, nlh);
3690 nlmsg_end(skb, nlh);
3694 static int xfrm_send_report(struct net *net, u8 proto,
3695 struct xfrm_selector *sel, xfrm_address_t *addr)
3697 struct sk_buff *skb;
3700 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3704 err = build_report(skb, proto, sel, addr);
3707 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3710 static inline unsigned int xfrm_mapping_msgsize(void)
3712 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3715 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3716 xfrm_address_t *new_saddr, __be16 new_sport)
3718 struct xfrm_user_mapping *um;
3719 struct nlmsghdr *nlh;
3721 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3725 um = nlmsg_data(nlh);
3727 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3728 um->id.spi = x->id.spi;
3729 um->id.family = x->props.family;
3730 um->id.proto = x->id.proto;
3731 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3732 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3733 um->new_sport = new_sport;
3734 um->old_sport = x->encap->encap_sport;
3735 um->reqid = x->props.reqid;
3737 nlmsg_end(skb, nlh);
3741 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3744 struct net *net = xs_net(x);
3745 struct sk_buff *skb;
3748 if (x->id.proto != IPPROTO_ESP)
3754 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3758 err = build_mapping(skb, x, ipaddr, sport);
3761 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3764 static bool xfrm_is_alive(const struct km_event *c)
3766 return (bool)xfrm_acquire_is_on(c->net);
3769 static struct xfrm_mgr netlink_mgr = {
3770 .notify = xfrm_send_state_notify,
3771 .acquire = xfrm_send_acquire,
3772 .compile_policy = xfrm_compile_policy,
3773 .notify_policy = xfrm_send_policy_notify,
3774 .report = xfrm_send_report,
3775 .migrate = xfrm_send_migrate,
3776 .new_mapping = xfrm_send_mapping,
3777 .is_alive = xfrm_is_alive,
3780 static int __net_init xfrm_user_net_init(struct net *net)
3783 struct netlink_kernel_cfg cfg = {
3784 .groups = XFRMNLGRP_MAX,
3785 .input = xfrm_netlink_rcv,
3788 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3791 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3792 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3796 static void __net_exit xfrm_user_net_pre_exit(struct net *net)
3798 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3801 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3805 list_for_each_entry(net, net_exit_list, exit_list)
3806 netlink_kernel_release(net->xfrm.nlsk_stash);
3809 static struct pernet_operations xfrm_user_net_ops = {
3810 .init = xfrm_user_net_init,
3811 .pre_exit = xfrm_user_net_pre_exit,
3812 .exit_batch = xfrm_user_net_exit,
3815 static int __init xfrm_user_init(void)
3819 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3821 rv = register_pernet_subsys(&xfrm_user_net_ops);
3824 xfrm_register_km(&netlink_mgr);
3828 static void __exit xfrm_user_exit(void)
3830 xfrm_unregister_km(&netlink_mgr);
3831 unregister_pernet_subsys(&xfrm_user_net_ops);
3834 module_init(xfrm_user_init);
3835 module_exit(xfrm_user_exit);
3836 MODULE_LICENSE("GPL");
3837 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);