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, u8 sa_dir,
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");
171 if (sa_dir == XFRM_SA_DIR_OUT) {
172 if (rs->replay_window) {
173 NL_SET_ERR_MSG(extack, "Replay window should be 0 for output SA");
176 if (rs->seq || rs->seq_hi) {
177 NL_SET_ERR_MSG(extack,
178 "Replay seq and seq_hi should be 0 for output SA");
182 NL_SET_ERR_MSG(extack, "Replay bmp_len should 0 for output SA");
187 if (sa_dir == XFRM_SA_DIR_IN) {
188 if (rs->oseq || rs->oseq_hi) {
189 NL_SET_ERR_MSG(extack,
190 "Replay oseq and oseq_hi should be 0 for input SA");
198 static int verify_newsa_info(struct xfrm_usersa_info *p,
199 struct nlattr **attrs,
200 struct netlink_ext_ack *extack)
203 u8 sa_dir = attrs[XFRMA_SA_DIR] ? nla_get_u8(attrs[XFRMA_SA_DIR]) : 0;
211 #if IS_ENABLED(CONFIG_IPV6)
215 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
220 NL_SET_ERR_MSG(extack, "Invalid address family");
224 switch (p->sel.family) {
229 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
230 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
237 #if IS_ENABLED(CONFIG_IPV6)
238 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
239 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
245 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
251 NL_SET_ERR_MSG(extack, "Invalid address family in selector");
256 switch (p->id.proto) {
258 if (!attrs[XFRMA_ALG_AUTH] &&
259 !attrs[XFRMA_ALG_AUTH_TRUNC]) {
260 NL_SET_ERR_MSG(extack, "Missing required attribute for AH: AUTH_TRUNC or AUTH");
264 if (attrs[XFRMA_ALG_AEAD] ||
265 attrs[XFRMA_ALG_CRYPT] ||
266 attrs[XFRMA_ALG_COMP] ||
267 attrs[XFRMA_TFCPAD]) {
268 NL_SET_ERR_MSG(extack, "Invalid attributes for AH: AEAD, CRYPT, COMP, TFCPAD");
274 if (attrs[XFRMA_ALG_COMP]) {
275 NL_SET_ERR_MSG(extack, "Invalid attribute for ESP: COMP");
279 if (!attrs[XFRMA_ALG_AUTH] &&
280 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
281 !attrs[XFRMA_ALG_CRYPT] &&
282 !attrs[XFRMA_ALG_AEAD]) {
283 NL_SET_ERR_MSG(extack, "Missing required attribute for ESP: at least one of AUTH, AUTH_TRUNC, CRYPT, AEAD");
287 if ((attrs[XFRMA_ALG_AUTH] ||
288 attrs[XFRMA_ALG_AUTH_TRUNC] ||
289 attrs[XFRMA_ALG_CRYPT]) &&
290 attrs[XFRMA_ALG_AEAD]) {
291 NL_SET_ERR_MSG(extack, "Invalid attribute combination for ESP: AEAD can't be used with AUTH, AUTH_TRUNC, CRYPT");
295 if (attrs[XFRMA_TFCPAD] &&
296 p->mode != XFRM_MODE_TUNNEL) {
297 NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode");
303 if (!attrs[XFRMA_ALG_COMP]) {
304 NL_SET_ERR_MSG(extack, "Missing required attribute for COMP: COMP");
308 if (attrs[XFRMA_ALG_AEAD] ||
309 attrs[XFRMA_ALG_AUTH] ||
310 attrs[XFRMA_ALG_AUTH_TRUNC] ||
311 attrs[XFRMA_ALG_CRYPT] ||
312 attrs[XFRMA_TFCPAD]) {
313 NL_SET_ERR_MSG(extack, "Invalid attributes for COMP: AEAD, AUTH, AUTH_TRUNC, CRYPT, TFCPAD");
317 if (ntohl(p->id.spi) >= 0x10000) {
318 NL_SET_ERR_MSG(extack, "SPI is too large for COMP (must be < 0x10000)");
323 #if IS_ENABLED(CONFIG_IPV6)
324 case IPPROTO_DSTOPTS:
325 case IPPROTO_ROUTING:
326 if (attrs[XFRMA_ALG_COMP] ||
327 attrs[XFRMA_ALG_AUTH] ||
328 attrs[XFRMA_ALG_AUTH_TRUNC] ||
329 attrs[XFRMA_ALG_AEAD] ||
330 attrs[XFRMA_ALG_CRYPT] ||
331 attrs[XFRMA_ENCAP] ||
332 attrs[XFRMA_SEC_CTX] ||
333 attrs[XFRMA_TFCPAD]) {
334 NL_SET_ERR_MSG(extack, "Invalid attributes for DSTOPTS/ROUTING");
338 if (!attrs[XFRMA_COADDR]) {
339 NL_SET_ERR_MSG(extack, "Missing required COADDR attribute for DSTOPTS/ROUTING");
346 NL_SET_ERR_MSG(extack, "Unsupported protocol");
350 if ((err = verify_aead(attrs, extack)))
352 if ((err = verify_auth_trunc(attrs, extack)))
354 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH, extack)))
356 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT, extack)))
358 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP, extack)))
360 if ((err = verify_sec_ctx_len(attrs, extack)))
362 if ((err = verify_replay(p, attrs, sa_dir, extack)))
367 case XFRM_MODE_TRANSPORT:
368 case XFRM_MODE_TUNNEL:
369 case XFRM_MODE_ROUTEOPTIMIZATION:
374 NL_SET_ERR_MSG(extack, "Unsupported mode");
380 if (attrs[XFRMA_MTIMER_THRESH]) {
381 if (!attrs[XFRMA_ENCAP]) {
382 NL_SET_ERR_MSG(extack, "MTIMER_THRESH attribute can only be set on ENCAP states");
387 if (sa_dir == XFRM_SA_DIR_OUT) {
388 NL_SET_ERR_MSG(extack,
389 "MTIMER_THRESH attribute should not be set on output SA");
395 if (sa_dir == XFRM_SA_DIR_OUT) {
396 if (p->flags & XFRM_STATE_DECAP_DSCP) {
397 NL_SET_ERR_MSG(extack, "Flag DECAP_DSCP should not be set for output SA");
402 if (p->flags & XFRM_STATE_ICMP) {
403 NL_SET_ERR_MSG(extack, "Flag ICMP should not be set for output SA");
408 if (p->flags & XFRM_STATE_WILDRECV) {
409 NL_SET_ERR_MSG(extack, "Flag WILDRECV should not be set for output SA");
414 if (p->replay_window) {
415 NL_SET_ERR_MSG(extack, "Replay window should be 0 for output SA");
420 if (attrs[XFRMA_REPLAY_VAL]) {
421 struct xfrm_replay_state *replay;
423 replay = nla_data(attrs[XFRMA_REPLAY_VAL]);
425 if (replay->seq || replay->bitmap) {
426 NL_SET_ERR_MSG(extack,
427 "Replay seq and bitmap should be 0 for output SA");
434 if (sa_dir == XFRM_SA_DIR_IN) {
435 if (p->flags & XFRM_STATE_NOPMTUDISC) {
436 NL_SET_ERR_MSG(extack, "Flag NOPMTUDISC should not be set for input SA");
441 if (attrs[XFRMA_SA_EXTRA_FLAGS]) {
442 u32 xflags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
444 if (xflags & XFRM_SA_XFLAG_DONT_ENCAP_DSCP) {
445 NL_SET_ERR_MSG(extack, "Flag DONT_ENCAP_DSCP should not be set for input SA");
450 if (xflags & XFRM_SA_XFLAG_OSEQ_MAY_WRAP) {
451 NL_SET_ERR_MSG(extack, "Flag OSEQ_MAY_WRAP should not be set for input SA");
463 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
464 struct xfrm_algo_desc *(*get_byname)(const char *, int),
465 struct nlattr *rta, struct netlink_ext_ack *extack)
467 struct xfrm_algo *p, *ualg;
468 struct xfrm_algo_desc *algo;
473 ualg = nla_data(rta);
475 algo = get_byname(ualg->alg_name, 1);
477 NL_SET_ERR_MSG(extack, "Requested COMP algorithm not found");
480 *props = algo->desc.sadb_alg_id;
482 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
486 strcpy(p->alg_name, algo->name);
491 static int attach_crypt(struct xfrm_state *x, struct nlattr *rta,
492 struct netlink_ext_ack *extack)
494 struct xfrm_algo *p, *ualg;
495 struct xfrm_algo_desc *algo;
500 ualg = nla_data(rta);
502 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
504 NL_SET_ERR_MSG(extack, "Requested CRYPT algorithm not found");
507 x->props.ealgo = algo->desc.sadb_alg_id;
509 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
513 strcpy(p->alg_name, algo->name);
515 x->geniv = algo->uinfo.encr.geniv;
519 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
520 struct nlattr *rta, struct netlink_ext_ack *extack)
522 struct xfrm_algo *ualg;
523 struct xfrm_algo_auth *p;
524 struct xfrm_algo_desc *algo;
529 ualg = nla_data(rta);
531 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
533 NL_SET_ERR_MSG(extack, "Requested AUTH algorithm not found");
536 *props = algo->desc.sadb_alg_id;
538 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
542 strcpy(p->alg_name, algo->name);
543 p->alg_key_len = ualg->alg_key_len;
544 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
545 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
551 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
552 struct nlattr *rta, struct netlink_ext_ack *extack)
554 struct xfrm_algo_auth *p, *ualg;
555 struct xfrm_algo_desc *algo;
560 ualg = nla_data(rta);
562 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
564 NL_SET_ERR_MSG(extack, "Requested AUTH_TRUNC algorithm not found");
567 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) {
568 NL_SET_ERR_MSG(extack, "Invalid length requested for truncated ICV");
571 *props = algo->desc.sadb_alg_id;
573 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
577 strcpy(p->alg_name, algo->name);
578 if (!p->alg_trunc_len)
579 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
585 static int attach_aead(struct xfrm_state *x, struct nlattr *rta,
586 struct netlink_ext_ack *extack)
588 struct xfrm_algo_aead *p, *ualg;
589 struct xfrm_algo_desc *algo;
594 ualg = nla_data(rta);
596 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
598 NL_SET_ERR_MSG(extack, "Requested AEAD algorithm not found");
601 x->props.ealgo = algo->desc.sadb_alg_id;
603 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
607 strcpy(p->alg_name, algo->name);
609 x->geniv = algo->uinfo.aead.geniv;
613 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
615 struct netlink_ext_ack *extack)
617 struct xfrm_replay_state_esn *up;
620 if (!replay_esn || !rp)
624 ulen = xfrm_replay_state_esn_len(up);
626 /* Check the overall length and the internal bitmap length to avoid
627 * potential overflow. */
628 if (nla_len(rp) < (int)ulen) {
629 NL_SET_ERR_MSG(extack, "ESN attribute is too short");
633 if (xfrm_replay_state_esn_len(replay_esn) != ulen) {
634 NL_SET_ERR_MSG(extack, "New ESN size doesn't match the existing SA's ESN size");
638 if (replay_esn->bmp_len != up->bmp_len) {
639 NL_SET_ERR_MSG(extack, "New ESN bitmap size doesn't match the existing SA's ESN bitmap");
643 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8) {
644 NL_SET_ERR_MSG(extack, "ESN replay window is longer than the bitmap");
651 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
652 struct xfrm_replay_state_esn **preplay_esn,
655 struct xfrm_replay_state_esn *p, *pp, *up;
656 unsigned int klen, ulen;
662 klen = xfrm_replay_state_esn_len(up);
663 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
665 p = kzalloc(klen, GFP_KERNEL);
669 pp = kzalloc(klen, GFP_KERNEL);
676 memcpy(pp, up, ulen);
684 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
686 unsigned int len = 0;
689 len += sizeof(struct xfrm_user_sec_ctx);
690 len += xfrm_ctx->ctx_len;
695 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
697 memcpy(&x->id, &p->id, sizeof(x->id));
698 memcpy(&x->sel, &p->sel, sizeof(x->sel));
699 memcpy(&x->lft, &p->lft, sizeof(x->lft));
700 x->props.mode = p->mode;
701 x->props.replay_window = min_t(unsigned int, p->replay_window,
702 sizeof(x->replay.bitmap) * 8);
703 x->props.reqid = p->reqid;
704 x->props.family = p->family;
705 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
706 x->props.flags = p->flags;
708 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
709 x->sel.family = p->family;
713 * someday when pfkey also has support, we could have the code
714 * somehow made shareable and move it to xfrm_state.c - JHS
717 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
720 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
721 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
722 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
723 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
724 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
725 struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH];
727 if (re && x->replay_esn && x->preplay_esn) {
728 struct xfrm_replay_state_esn *replay_esn;
729 replay_esn = nla_data(re);
730 memcpy(x->replay_esn, replay_esn,
731 xfrm_replay_state_esn_len(replay_esn));
732 memcpy(x->preplay_esn, replay_esn,
733 xfrm_replay_state_esn_len(replay_esn));
737 struct xfrm_replay_state *replay;
738 replay = nla_data(rp);
739 memcpy(&x->replay, replay, sizeof(*replay));
740 memcpy(&x->preplay, replay, sizeof(*replay));
744 struct xfrm_lifetime_cur *ltime;
745 ltime = nla_data(lt);
746 x->curlft.bytes = ltime->bytes;
747 x->curlft.packets = ltime->packets;
748 x->curlft.add_time = ltime->add_time;
749 x->curlft.use_time = ltime->use_time;
753 x->replay_maxage = nla_get_u32(et);
756 x->replay_maxdiff = nla_get_u32(rt);
759 x->mapping_maxage = nla_get_u32(mt);
762 static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
764 if (attrs[XFRMA_SET_MARK]) {
765 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
766 if (attrs[XFRMA_SET_MARK_MASK])
767 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
775 static struct xfrm_state *xfrm_state_construct(struct net *net,
776 struct xfrm_usersa_info *p,
777 struct nlattr **attrs,
779 struct netlink_ext_ack *extack)
781 struct xfrm_state *x = xfrm_state_alloc(net);
787 copy_from_user_state(x, p);
789 if (attrs[XFRMA_ENCAP]) {
790 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
791 sizeof(*x->encap), GFP_KERNEL);
792 if (x->encap == NULL)
796 if (attrs[XFRMA_COADDR]) {
797 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
798 sizeof(*x->coaddr), GFP_KERNEL);
799 if (x->coaddr == NULL)
803 if (attrs[XFRMA_SA_EXTRA_FLAGS])
804 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
806 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD], extack)))
808 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
809 attrs[XFRMA_ALG_AUTH_TRUNC], extack)))
811 if (!x->props.aalgo) {
812 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
813 attrs[XFRMA_ALG_AUTH], extack)))
816 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT], extack)))
818 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
819 xfrm_calg_get_byname,
820 attrs[XFRMA_ALG_COMP], extack)))
823 if (attrs[XFRMA_TFCPAD])
824 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
826 xfrm_mark_get(attrs, &x->mark);
828 xfrm_smark_init(attrs, &x->props.smark);
830 if (attrs[XFRMA_IF_ID])
831 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
833 if (attrs[XFRMA_SA_DIR])
834 x->dir = nla_get_u8(attrs[XFRMA_SA_DIR]);
836 if (attrs[XFRMA_NAT_KEEPALIVE_INTERVAL])
837 x->nat_keepalive_interval =
838 nla_get_u32(attrs[XFRMA_NAT_KEEPALIVE_INTERVAL]);
840 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV], extack);
844 if (attrs[XFRMA_SEC_CTX]) {
845 err = security_xfrm_state_alloc(x,
846 nla_data(attrs[XFRMA_SEC_CTX]));
851 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
852 attrs[XFRMA_REPLAY_ESN_VAL])))
856 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
857 /* sysctl_xfrm_aevent_etime is in 100ms units */
858 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
860 if ((err = xfrm_init_replay(x, extack)))
863 /* override default values from above */
864 xfrm_update_ae_params(x, attrs, 0);
866 /* configure the hardware if offload is requested */
867 if (attrs[XFRMA_OFFLOAD_DEV]) {
868 err = xfrm_dev_state_add(net, x,
869 nla_data(attrs[XFRMA_OFFLOAD_DEV]),
878 x->km.state = XFRM_STATE_DEAD;
885 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
886 struct nlattr **attrs, struct netlink_ext_ack *extack)
888 struct net *net = sock_net(skb->sk);
889 struct xfrm_usersa_info *p = nlmsg_data(nlh);
890 struct xfrm_state *x;
894 err = verify_newsa_info(p, attrs, extack);
898 x = xfrm_state_construct(net, p, attrs, &err, extack);
903 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
904 err = xfrm_state_add(x);
906 err = xfrm_state_update(x);
908 xfrm_audit_state_add(x, err ? 0 : 1, true);
911 x->km.state = XFRM_STATE_DEAD;
912 xfrm_dev_state_delete(x);
917 if (x->km.state == XFRM_STATE_VOID)
918 x->km.state = XFRM_STATE_VALID;
920 c.seq = nlh->nlmsg_seq;
921 c.portid = nlh->nlmsg_pid;
922 c.event = nlh->nlmsg_type;
924 km_state_notify(x, &c);
930 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
931 struct xfrm_usersa_id *p,
932 struct nlattr **attrs,
935 struct xfrm_state *x = NULL;
938 u32 mark = xfrm_mark_get(attrs, &m);
940 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
942 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
944 xfrm_address_t *saddr = NULL;
946 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
953 x = xfrm_state_lookup_byaddr(net, mark,
955 p->proto, p->family);
964 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
965 struct nlattr **attrs, struct netlink_ext_ack *extack)
967 struct net *net = sock_net(skb->sk);
968 struct xfrm_state *x;
971 struct xfrm_usersa_id *p = nlmsg_data(nlh);
973 x = xfrm_user_state_lookup(net, p, attrs, &err);
977 if ((err = security_xfrm_state_delete(x)) != 0)
980 if (xfrm_state_kern(x)) {
981 NL_SET_ERR_MSG(extack, "SA is in use by tunnels");
986 err = xfrm_state_delete(x);
990 c.seq = nlh->nlmsg_seq;
991 c.portid = nlh->nlmsg_pid;
992 c.event = nlh->nlmsg_type;
993 km_state_notify(x, &c);
996 xfrm_audit_state_delete(x, err ? 0 : 1, true);
1001 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
1003 memset(p, 0, sizeof(*p));
1004 memcpy(&p->id, &x->id, sizeof(p->id));
1005 memcpy(&p->sel, &x->sel, sizeof(p->sel));
1006 memcpy(&p->lft, &x->lft, sizeof(p->lft));
1008 xfrm_dev_state_update_stats(x);
1009 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
1010 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
1011 put_unaligned(x->stats.replay, &p->stats.replay);
1012 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
1013 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1014 p->mode = x->props.mode;
1015 p->replay_window = x->props.replay_window;
1016 p->reqid = x->props.reqid;
1017 p->family = x->props.family;
1018 p->flags = x->props.flags;
1022 struct xfrm_dump_info {
1023 struct sk_buff *in_skb;
1024 struct sk_buff *out_skb;
1029 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1031 struct xfrm_user_sec_ctx *uctx;
1032 struct nlattr *attr;
1033 int ctx_size = sizeof(*uctx) + s->ctx_len;
1035 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
1039 uctx = nla_data(attr);
1040 uctx->exttype = XFRMA_SEC_CTX;
1041 uctx->len = ctx_size;
1042 uctx->ctx_doi = s->ctx_doi;
1043 uctx->ctx_alg = s->ctx_alg;
1044 uctx->ctx_len = s->ctx_len;
1045 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1050 static int copy_user_offload(struct xfrm_dev_offload *xso, struct sk_buff *skb)
1052 struct xfrm_user_offload *xuo;
1053 struct nlattr *attr;
1055 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
1059 xuo = nla_data(attr);
1060 memset(xuo, 0, sizeof(*xuo));
1061 xuo->ifindex = xso->dev->ifindex;
1062 if (xso->dir == XFRM_DEV_OFFLOAD_IN)
1063 xuo->flags = XFRM_OFFLOAD_INBOUND;
1064 if (xso->type == XFRM_DEV_OFFLOAD_PACKET)
1065 xuo->flags |= XFRM_OFFLOAD_PACKET;
1070 static bool xfrm_redact(void)
1072 return IS_ENABLED(CONFIG_SECURITY) &&
1073 security_locked_down(LOCKDOWN_XFRM_SECRET);
1076 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
1078 struct xfrm_algo *algo;
1079 struct xfrm_algo_auth *ap;
1081 bool redact_secret = xfrm_redact();
1083 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
1084 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
1087 algo = nla_data(nla);
1088 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
1090 if (redact_secret && auth->alg_key_len)
1091 memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8);
1093 memcpy(algo->alg_key, auth->alg_key,
1094 (auth->alg_key_len + 7) / 8);
1095 algo->alg_key_len = auth->alg_key_len;
1097 nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth));
1101 memcpy(ap, auth, sizeof(struct xfrm_algo_auth));
1102 if (redact_secret && auth->alg_key_len)
1103 memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8);
1105 memcpy(ap->alg_key, auth->alg_key,
1106 (auth->alg_key_len + 7) / 8);
1110 static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb)
1112 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead));
1113 struct xfrm_algo_aead *ap;
1114 bool redact_secret = xfrm_redact();
1120 strscpy_pad(ap->alg_name, aead->alg_name, sizeof(ap->alg_name));
1121 ap->alg_key_len = aead->alg_key_len;
1122 ap->alg_icv_len = aead->alg_icv_len;
1124 if (redact_secret && aead->alg_key_len)
1125 memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8);
1127 memcpy(ap->alg_key, aead->alg_key,
1128 (aead->alg_key_len + 7) / 8);
1132 static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
1134 struct xfrm_algo *ap;
1135 bool redact_secret = xfrm_redact();
1136 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT,
1137 xfrm_alg_len(ealg));
1142 strscpy_pad(ap->alg_name, ealg->alg_name, sizeof(ap->alg_name));
1143 ap->alg_key_len = ealg->alg_key_len;
1145 if (redact_secret && ealg->alg_key_len)
1146 memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8);
1148 memcpy(ap->alg_key, ealg->alg_key,
1149 (ealg->alg_key_len + 7) / 8);
1154 static int copy_to_user_calg(struct xfrm_algo *calg, struct sk_buff *skb)
1156 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_COMP, sizeof(*calg));
1157 struct xfrm_algo *ap;
1163 strscpy_pad(ap->alg_name, calg->alg_name, sizeof(ap->alg_name));
1164 ap->alg_key_len = 0;
1169 static int copy_to_user_encap(struct xfrm_encap_tmpl *ep, struct sk_buff *skb)
1171 struct nlattr *nla = nla_reserve(skb, XFRMA_ENCAP, sizeof(*ep));
1172 struct xfrm_encap_tmpl *uep;
1177 uep = nla_data(nla);
1178 memset(uep, 0, sizeof(*uep));
1180 uep->encap_type = ep->encap_type;
1181 uep->encap_sport = ep->encap_sport;
1182 uep->encap_dport = ep->encap_dport;
1183 uep->encap_oa = ep->encap_oa;
1188 static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
1193 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
1195 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
1200 /* Don't change this without updating xfrm_sa_len! */
1201 static int copy_to_user_state_extra(struct xfrm_state *x,
1202 struct xfrm_usersa_info *p,
1203 struct sk_buff *skb)
1207 copy_to_user_state(x, p);
1209 if (x->props.extra_flags) {
1210 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
1211 x->props.extra_flags);
1217 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
1222 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
1228 ret = copy_to_user_aead(x->aead, skb);
1233 ret = copy_to_user_auth(x->aalg, skb);
1238 ret = copy_to_user_ealg(x->ealg, skb);
1243 ret = copy_to_user_calg(x->calg, skb);
1248 ret = copy_to_user_encap(x->encap, skb);
1253 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
1257 ret = xfrm_mark_put(skb, &x->mark);
1261 ret = xfrm_smark_put(skb, &x->props.smark);
1266 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1267 xfrm_replay_state_esn_len(x->replay_esn),
1270 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1275 ret = copy_user_offload(&x->xso, skb);
1279 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
1284 ret = copy_sec_ctx(x->security, skb);
1288 if (x->mapping_maxage) {
1289 ret = nla_put_u32(skb, XFRMA_MTIMER_THRESH, x->mapping_maxage);
1294 ret = nla_put_u8(skb, XFRMA_SA_DIR, x->dir);
1296 if (x->nat_keepalive_interval) {
1297 ret = nla_put_u32(skb, XFRMA_NAT_KEEPALIVE_INTERVAL,
1298 x->nat_keepalive_interval);
1306 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
1308 struct xfrm_dump_info *sp = ptr;
1309 struct sk_buff *in_skb = sp->in_skb;
1310 struct sk_buff *skb = sp->out_skb;
1311 struct xfrm_translator *xtr;
1312 struct xfrm_usersa_info *p;
1313 struct nlmsghdr *nlh;
1316 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1317 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
1321 p = nlmsg_data(nlh);
1323 err = copy_to_user_state_extra(x, p, skb);
1325 nlmsg_cancel(skb, nlh);
1328 nlmsg_end(skb, nlh);
1330 xtr = xfrm_get_translator();
1332 err = xtr->alloc_compat(skb, nlh);
1334 xfrm_put_translator(xtr);
1336 nlmsg_cancel(skb, nlh);
1344 static int xfrm_dump_sa_done(struct netlink_callback *cb)
1346 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1347 struct sock *sk = cb->skb->sk;
1348 struct net *net = sock_net(sk);
1351 xfrm_state_walk_done(walk, net);
1355 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1357 struct net *net = sock_net(skb->sk);
1358 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1359 struct xfrm_dump_info info;
1361 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1362 sizeof(cb->args) - sizeof(cb->args[0]));
1364 info.in_skb = cb->skb;
1366 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1367 info.nlmsg_flags = NLM_F_MULTI;
1370 struct nlattr *attrs[XFRMA_MAX+1];
1371 struct xfrm_address_filter *filter = NULL;
1375 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1376 xfrma_policy, cb->extack);
1380 if (attrs[XFRMA_ADDRESS_FILTER]) {
1381 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1382 sizeof(*filter), GFP_KERNEL);
1386 /* see addr_match(), (prefix length >> 5) << 2
1387 * will be used to compare xfrm_address_t
1389 if (filter->splen > (sizeof(xfrm_address_t) << 3) ||
1390 filter->dplen > (sizeof(xfrm_address_t) << 3)) {
1396 if (attrs[XFRMA_PROTO])
1397 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1399 xfrm_state_walk_init(walk, proto, filter);
1403 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1408 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1409 struct xfrm_state *x, u32 seq)
1411 struct xfrm_dump_info info;
1412 struct sk_buff *skb;
1415 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1417 return ERR_PTR(-ENOMEM);
1419 info.in_skb = in_skb;
1421 info.nlmsg_seq = seq;
1422 info.nlmsg_flags = 0;
1424 err = dump_one_state(x, 0, &info);
1427 return ERR_PTR(err);
1433 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1434 * Must be called with RCU read lock.
1436 static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1437 u32 pid, unsigned int group)
1439 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1440 struct xfrm_translator *xtr;
1447 xtr = xfrm_get_translator();
1449 int err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1451 xfrm_put_translator(xtr);
1458 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1461 static inline unsigned int xfrm_spdinfo_msgsize(void)
1463 return NLMSG_ALIGN(4)
1464 + nla_total_size(sizeof(struct xfrmu_spdinfo))
1465 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1466 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1467 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
1470 static int build_spdinfo(struct sk_buff *skb, struct net *net,
1471 u32 portid, u32 seq, u32 flags)
1473 struct xfrmk_spdinfo si;
1474 struct xfrmu_spdinfo spc;
1475 struct xfrmu_spdhinfo sph;
1476 struct xfrmu_spdhthresh spt4, spt6;
1477 struct nlmsghdr *nlh;
1482 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
1483 if (nlh == NULL) /* shouldn't really happen ... */
1486 f = nlmsg_data(nlh);
1488 xfrm_spd_getinfo(net, &si);
1489 spc.incnt = si.incnt;
1490 spc.outcnt = si.outcnt;
1491 spc.fwdcnt = si.fwdcnt;
1492 spc.inscnt = si.inscnt;
1493 spc.outscnt = si.outscnt;
1494 spc.fwdscnt = si.fwdscnt;
1495 sph.spdhcnt = si.spdhcnt;
1496 sph.spdhmcnt = si.spdhmcnt;
1499 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1501 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1502 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1503 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1504 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1505 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1507 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1509 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
1511 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1513 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1515 nlmsg_cancel(skb, nlh);
1519 nlmsg_end(skb, nlh);
1523 static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1524 struct nlattr **attrs,
1525 struct netlink_ext_ack *extack)
1527 struct net *net = sock_net(skb->sk);
1528 struct xfrmu_spdhthresh *thresh4 = NULL;
1529 struct xfrmu_spdhthresh *thresh6 = NULL;
1531 /* selector prefixlen thresholds to hash policies */
1532 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1533 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1535 if (nla_len(rta) < sizeof(*thresh4)) {
1536 NL_SET_ERR_MSG(extack, "Invalid SPD_IPV4_HTHRESH attribute length");
1539 thresh4 = nla_data(rta);
1540 if (thresh4->lbits > 32 || thresh4->rbits > 32) {
1541 NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 32 for IPv4)");
1545 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1546 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1548 if (nla_len(rta) < sizeof(*thresh6)) {
1549 NL_SET_ERR_MSG(extack, "Invalid SPD_IPV6_HTHRESH attribute length");
1552 thresh6 = nla_data(rta);
1553 if (thresh6->lbits > 128 || thresh6->rbits > 128) {
1554 NL_SET_ERR_MSG(extack, "Invalid hash threshold (must be <= 128 for IPv6)");
1559 if (thresh4 || thresh6) {
1560 write_seqlock(&net->xfrm.policy_hthresh.lock);
1562 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1563 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1566 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1567 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1569 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1571 xfrm_policy_hash_rebuild(net);
1577 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1578 struct nlattr **attrs,
1579 struct netlink_ext_ack *extack)
1581 struct net *net = sock_net(skb->sk);
1582 struct sk_buff *r_skb;
1583 u32 *flags = nlmsg_data(nlh);
1584 u32 sportid = NETLINK_CB(skb).portid;
1585 u32 seq = nlh->nlmsg_seq;
1588 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
1592 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1595 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1598 static inline unsigned int xfrm_sadinfo_msgsize(void)
1600 return NLMSG_ALIGN(4)
1601 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1602 + nla_total_size(4); /* XFRMA_SAD_CNT */
1605 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1606 u32 portid, u32 seq, u32 flags)
1608 struct xfrmk_sadinfo si;
1609 struct xfrmu_sadhinfo sh;
1610 struct nlmsghdr *nlh;
1614 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1615 if (nlh == NULL) /* shouldn't really happen ... */
1618 f = nlmsg_data(nlh);
1620 xfrm_sad_getinfo(net, &si);
1622 sh.sadhmcnt = si.sadhmcnt;
1623 sh.sadhcnt = si.sadhcnt;
1625 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1627 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1629 nlmsg_cancel(skb, nlh);
1633 nlmsg_end(skb, nlh);
1637 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1638 struct nlattr **attrs,
1639 struct netlink_ext_ack *extack)
1641 struct net *net = sock_net(skb->sk);
1642 struct sk_buff *r_skb;
1643 u32 *flags = nlmsg_data(nlh);
1644 u32 sportid = NETLINK_CB(skb).portid;
1645 u32 seq = nlh->nlmsg_seq;
1648 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1652 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1655 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1658 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1659 struct nlattr **attrs, struct netlink_ext_ack *extack)
1661 struct net *net = sock_net(skb->sk);
1662 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1663 struct xfrm_state *x;
1664 struct sk_buff *resp_skb;
1667 x = xfrm_user_state_lookup(net, p, attrs, &err);
1671 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1672 if (IS_ERR(resp_skb)) {
1673 err = PTR_ERR(resp_skb);
1675 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1682 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1683 struct nlattr **attrs,
1684 struct netlink_ext_ack *extack)
1686 struct net *net = sock_net(skb->sk);
1687 struct xfrm_state *x;
1688 struct xfrm_userspi_info *p;
1689 struct xfrm_translator *xtr;
1690 struct sk_buff *resp_skb;
1691 xfrm_address_t *daddr;
1698 p = nlmsg_data(nlh);
1699 err = verify_spi_info(p->info.id.proto, p->min, p->max, extack);
1703 family = p->info.family;
1704 daddr = &p->info.id.daddr;
1708 mark = xfrm_mark_get(attrs, &m);
1710 if (attrs[XFRMA_IF_ID])
1711 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1714 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1715 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1722 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1723 if_id, p->info.id.proto, daddr,
1728 NL_SET_ERR_MSG(extack, "Target ACQUIRE not found");
1732 err = xfrm_alloc_spi(x, p->min, p->max, extack);
1736 if (attrs[XFRMA_SA_DIR])
1737 x->dir = nla_get_u8(attrs[XFRMA_SA_DIR]);
1739 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1740 if (IS_ERR(resp_skb)) {
1741 err = PTR_ERR(resp_skb);
1745 xtr = xfrm_get_translator();
1747 err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1749 xfrm_put_translator(xtr);
1751 kfree_skb(resp_skb);
1756 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1764 static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack)
1767 case XFRM_POLICY_IN:
1768 case XFRM_POLICY_OUT:
1769 case XFRM_POLICY_FWD:
1773 NL_SET_ERR_MSG(extack, "Invalid policy direction");
1780 static int verify_policy_type(u8 type, struct netlink_ext_ack *extack)
1783 case XFRM_POLICY_TYPE_MAIN:
1784 #ifdef CONFIG_XFRM_SUB_POLICY
1785 case XFRM_POLICY_TYPE_SUB:
1790 NL_SET_ERR_MSG(extack, "Invalid policy type");
1797 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p,
1798 struct netlink_ext_ack *extack)
1803 case XFRM_SHARE_ANY:
1804 case XFRM_SHARE_SESSION:
1805 case XFRM_SHARE_USER:
1806 case XFRM_SHARE_UNIQUE:
1810 NL_SET_ERR_MSG(extack, "Invalid policy share");
1814 switch (p->action) {
1815 case XFRM_POLICY_ALLOW:
1816 case XFRM_POLICY_BLOCK:
1820 NL_SET_ERR_MSG(extack, "Invalid policy action");
1824 switch (p->sel.family) {
1826 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
1827 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
1834 #if IS_ENABLED(CONFIG_IPV6)
1835 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
1836 NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
1842 NL_SET_ERR_MSG(extack, "IPv6 support disabled");
1843 return -EAFNOSUPPORT;
1847 NL_SET_ERR_MSG(extack, "Invalid selector family");
1851 ret = verify_policy_dir(p->dir, extack);
1854 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) {
1855 NL_SET_ERR_MSG(extack, "Policy index doesn't match direction");
1862 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1864 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1865 struct xfrm_user_sec_ctx *uctx;
1870 uctx = nla_data(rt);
1871 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
1874 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1880 for (i = 0; i < nr; i++, ut++) {
1881 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1883 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1884 memcpy(&t->saddr, &ut->saddr,
1885 sizeof(xfrm_address_t));
1886 t->reqid = ut->reqid;
1888 t->share = ut->share;
1889 t->optional = ut->optional;
1890 t->aalgos = ut->aalgos;
1891 t->ealgos = ut->ealgos;
1892 t->calgos = ut->calgos;
1893 /* If all masks are ~0, then we allow all algorithms. */
1894 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1895 t->encap_family = ut->family;
1899 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,
1900 int dir, struct netlink_ext_ack *extack)
1905 if (nr > XFRM_MAX_DEPTH) {
1906 NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")");
1910 prev_family = family;
1912 for (i = 0; i < nr; i++) {
1913 /* We never validated the ut->family value, so many
1914 * applications simply leave it at zero. The check was
1915 * never made and ut->family was ignored because all
1916 * templates could be assumed to have the same family as
1917 * the policy itself. Now that we will have ipv4-in-ipv6
1918 * and ipv6-in-ipv4 tunnels, this is no longer true.
1921 ut[i].family = family;
1923 switch (ut[i].mode) {
1924 case XFRM_MODE_TUNNEL:
1925 case XFRM_MODE_BEET:
1926 if (ut[i].optional && dir == XFRM_POLICY_OUT) {
1927 NL_SET_ERR_MSG(extack, "Mode in optional template not allowed in outbound policy");
1932 if (ut[i].family != prev_family) {
1933 NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change");
1938 if (ut[i].mode >= XFRM_MODE_MAX) {
1939 NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")");
1943 prev_family = ut[i].family;
1945 switch (ut[i].family) {
1948 #if IS_ENABLED(CONFIG_IPV6)
1953 NL_SET_ERR_MSG(extack, "Invalid family in template");
1957 if (!xfrm_id_proto_valid(ut[i].id.proto)) {
1958 NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template");
1966 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs,
1967 int dir, struct netlink_ext_ack *extack)
1969 struct nlattr *rt = attrs[XFRMA_TMPL];
1974 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1975 int nr = nla_len(rt) / sizeof(*utmpl);
1978 err = validate_tmpl(nr, utmpl, pol->family, dir, extack);
1982 copy_templates(pol, utmpl, nr);
1987 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs,
1988 struct netlink_ext_ack *extack)
1990 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1991 struct xfrm_userpolicy_type *upt;
1992 u8 type = XFRM_POLICY_TYPE_MAIN;
2000 err = verify_policy_type(type, extack);
2008 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
2010 xp->priority = p->priority;
2011 xp->index = p->index;
2012 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
2013 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
2014 xp->action = p->action;
2015 xp->flags = p->flags;
2016 xp->family = p->sel.family;
2017 /* XXX xp->share = p->share; */
2020 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
2022 memset(p, 0, sizeof(*p));
2023 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
2024 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
2025 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
2026 p->priority = xp->priority;
2027 p->index = xp->index;
2028 p->sel.family = xp->family;
2030 p->action = xp->action;
2031 p->flags = xp->flags;
2032 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
2035 static struct xfrm_policy *xfrm_policy_construct(struct net *net,
2036 struct xfrm_userpolicy_info *p,
2037 struct nlattr **attrs,
2039 struct netlink_ext_ack *extack)
2041 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
2049 copy_from_user_policy(xp, p);
2051 err = copy_from_user_policy_type(&xp->type, attrs, extack);
2055 if (!(err = copy_from_user_tmpl(xp, attrs, p->dir, extack)))
2056 err = copy_from_user_sec_ctx(xp, attrs);
2060 xfrm_mark_get(attrs, &xp->mark);
2062 if (attrs[XFRMA_IF_ID])
2063 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2065 /* configure the hardware if offload is requested */
2066 if (attrs[XFRMA_OFFLOAD_DEV]) {
2067 err = xfrm_dev_policy_add(net, xp,
2068 nla_data(attrs[XFRMA_OFFLOAD_DEV]),
2078 xfrm_policy_destroy(xp);
2082 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2083 struct nlattr **attrs,
2084 struct netlink_ext_ack *extack)
2086 struct net *net = sock_net(skb->sk);
2087 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
2088 struct xfrm_policy *xp;
2093 err = verify_newpolicy_info(p, extack);
2096 err = verify_sec_ctx_len(attrs, extack);
2100 xp = xfrm_policy_construct(net, p, attrs, &err, extack);
2104 /* shouldn't excl be based on nlh flags??
2105 * Aha! this is anti-netlink really i.e more pfkey derived
2106 * in netlink excl is a flag and you wouldn't need
2107 * a type XFRM_MSG_UPDPOLICY - JHS */
2108 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
2109 err = xfrm_policy_insert(p->dir, xp, excl);
2110 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
2113 xfrm_dev_policy_delete(xp);
2114 xfrm_dev_policy_free(xp);
2115 security_xfrm_policy_free(xp->security);
2120 c.event = nlh->nlmsg_type;
2121 c.seq = nlh->nlmsg_seq;
2122 c.portid = nlh->nlmsg_pid;
2123 km_policy_notify(xp, p->dir, &c);
2130 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
2132 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
2135 if (xp->xfrm_nr == 0)
2138 if (xp->xfrm_nr > XFRM_MAX_DEPTH)
2141 for (i = 0; i < xp->xfrm_nr; i++) {
2142 struct xfrm_user_tmpl *up = &vec[i];
2143 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
2145 memset(up, 0, sizeof(*up));
2146 memcpy(&up->id, &kp->id, sizeof(up->id));
2147 up->family = kp->encap_family;
2148 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
2149 up->reqid = kp->reqid;
2150 up->mode = kp->mode;
2151 up->share = kp->share;
2152 up->optional = kp->optional;
2153 up->aalgos = kp->aalgos;
2154 up->ealgos = kp->ealgos;
2155 up->calgos = kp->calgos;
2158 return nla_put(skb, XFRMA_TMPL,
2159 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
2162 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
2165 return copy_sec_ctx(x->security, skb);
2170 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
2173 return copy_sec_ctx(xp->security, skb);
2176 static inline unsigned int userpolicy_type_attrsize(void)
2178 #ifdef CONFIG_XFRM_SUB_POLICY
2179 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
2185 #ifdef CONFIG_XFRM_SUB_POLICY
2186 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
2188 struct xfrm_userpolicy_type upt;
2190 /* Sadly there are two holes in struct xfrm_userpolicy_type */
2191 memset(&upt, 0, sizeof(upt));
2194 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
2198 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
2204 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
2206 struct xfrm_dump_info *sp = ptr;
2207 struct xfrm_userpolicy_info *p;
2208 struct sk_buff *in_skb = sp->in_skb;
2209 struct sk_buff *skb = sp->out_skb;
2210 struct xfrm_translator *xtr;
2211 struct nlmsghdr *nlh;
2214 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
2215 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
2219 p = nlmsg_data(nlh);
2220 copy_to_user_policy(xp, p, dir);
2221 err = copy_to_user_tmpl(xp, skb);
2223 err = copy_to_user_sec_ctx(xp, skb);
2225 err = copy_to_user_policy_type(xp->type, skb);
2227 err = xfrm_mark_put(skb, &xp->mark);
2229 err = xfrm_if_id_put(skb, xp->if_id);
2230 if (!err && xp->xdo.dev)
2231 err = copy_user_offload(&xp->xdo, skb);
2233 nlmsg_cancel(skb, nlh);
2236 nlmsg_end(skb, nlh);
2238 xtr = xfrm_get_translator();
2240 err = xtr->alloc_compat(skb, nlh);
2242 xfrm_put_translator(xtr);
2244 nlmsg_cancel(skb, nlh);
2252 static int xfrm_dump_policy_done(struct netlink_callback *cb)
2254 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2255 struct net *net = sock_net(cb->skb->sk);
2257 xfrm_policy_walk_done(walk, net);
2261 static int xfrm_dump_policy_start(struct netlink_callback *cb)
2263 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2265 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
2267 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
2271 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
2273 struct net *net = sock_net(skb->sk);
2274 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
2275 struct xfrm_dump_info info;
2277 info.in_skb = cb->skb;
2279 info.nlmsg_seq = cb->nlh->nlmsg_seq;
2280 info.nlmsg_flags = NLM_F_MULTI;
2282 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
2287 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
2288 struct xfrm_policy *xp,
2291 struct xfrm_dump_info info;
2292 struct sk_buff *skb;
2295 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2297 return ERR_PTR(-ENOMEM);
2299 info.in_skb = in_skb;
2301 info.nlmsg_seq = seq;
2302 info.nlmsg_flags = 0;
2304 err = dump_one_policy(xp, dir, 0, &info);
2307 return ERR_PTR(err);
2313 static int xfrm_notify_userpolicy(struct net *net)
2315 struct xfrm_userpolicy_default *up;
2316 int len = NLMSG_ALIGN(sizeof(*up));
2317 struct nlmsghdr *nlh;
2318 struct sk_buff *skb;
2321 skb = nlmsg_new(len, GFP_ATOMIC);
2325 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0);
2331 up = nlmsg_data(nlh);
2332 up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
2333 up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
2334 up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
2336 nlmsg_end(skb, nlh);
2339 err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
2345 static bool xfrm_userpolicy_is_valid(__u8 policy)
2347 return policy == XFRM_USERPOLICY_BLOCK ||
2348 policy == XFRM_USERPOLICY_ACCEPT;
2351 static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2352 struct nlattr **attrs, struct netlink_ext_ack *extack)
2354 struct net *net = sock_net(skb->sk);
2355 struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
2357 if (xfrm_userpolicy_is_valid(up->in))
2358 net->xfrm.policy_default[XFRM_POLICY_IN] = up->in;
2360 if (xfrm_userpolicy_is_valid(up->fwd))
2361 net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd;
2363 if (xfrm_userpolicy_is_valid(up->out))
2364 net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out;
2366 rt_genid_bump_all(net);
2368 xfrm_notify_userpolicy(net);
2372 static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2373 struct nlattr **attrs, struct netlink_ext_ack *extack)
2375 struct sk_buff *r_skb;
2376 struct nlmsghdr *r_nlh;
2377 struct net *net = sock_net(skb->sk);
2378 struct xfrm_userpolicy_default *r_up;
2379 int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default));
2380 u32 portid = NETLINK_CB(skb).portid;
2381 u32 seq = nlh->nlmsg_seq;
2383 r_skb = nlmsg_new(len, GFP_ATOMIC);
2387 r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0);
2393 r_up = nlmsg_data(r_nlh);
2394 r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
2395 r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
2396 r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
2397 nlmsg_end(r_skb, r_nlh);
2399 return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid);
2402 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2403 struct nlattr **attrs,
2404 struct netlink_ext_ack *extack)
2406 struct net *net = sock_net(skb->sk);
2407 struct xfrm_policy *xp;
2408 struct xfrm_userpolicy_id *p;
2409 u8 type = XFRM_POLICY_TYPE_MAIN;
2416 p = nlmsg_data(nlh);
2417 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
2419 err = copy_from_user_policy_type(&type, attrs, extack);
2423 err = verify_policy_dir(p->dir, extack);
2427 if (attrs[XFRMA_IF_ID])
2428 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2430 xfrm_mark_get(attrs, &m);
2433 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir,
2434 p->index, delete, &err);
2436 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2437 struct xfrm_sec_ctx *ctx;
2439 err = verify_sec_ctx_len(attrs, extack);
2445 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2447 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2451 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2452 &p->sel, ctx, delete, &err);
2453 security_xfrm_policy_free(ctx);
2459 struct sk_buff *resp_skb;
2461 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
2462 if (IS_ERR(resp_skb)) {
2463 err = PTR_ERR(resp_skb);
2465 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
2466 NETLINK_CB(skb).portid);
2469 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
2474 c.data.byid = p->index;
2475 c.event = nlh->nlmsg_type;
2476 c.seq = nlh->nlmsg_seq;
2477 c.portid = nlh->nlmsg_pid;
2478 km_policy_notify(xp, p->dir, &c);
2486 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
2487 struct nlattr **attrs,
2488 struct netlink_ext_ack *extack)
2490 struct net *net = sock_net(skb->sk);
2492 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
2495 err = xfrm_state_flush(net, p->proto, true, false);
2497 if (err == -ESRCH) /* empty table */
2501 c.data.proto = p->proto;
2502 c.event = nlh->nlmsg_type;
2503 c.seq = nlh->nlmsg_seq;
2504 c.portid = nlh->nlmsg_pid;
2506 km_state_notify(NULL, &c);
2511 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
2513 unsigned int replay_size = x->replay_esn ?
2514 xfrm_replay_state_esn_len(x->replay_esn) :
2515 sizeof(struct xfrm_replay_state);
2517 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
2518 + nla_total_size(replay_size)
2519 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
2520 + nla_total_size(sizeof(struct xfrm_mark))
2521 + nla_total_size(4) /* XFRM_AE_RTHR */
2522 + nla_total_size(4) /* XFRM_AE_ETHR */
2523 + nla_total_size(sizeof(x->dir)); /* XFRMA_SA_DIR */
2526 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2528 struct xfrm_aevent_id *id;
2529 struct nlmsghdr *nlh;
2532 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
2536 id = nlmsg_data(nlh);
2537 memset(&id->sa_id, 0, sizeof(id->sa_id));
2538 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
2539 id->sa_id.spi = x->id.spi;
2540 id->sa_id.family = x->props.family;
2541 id->sa_id.proto = x->id.proto;
2542 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2543 id->reqid = x->props.reqid;
2544 id->flags = c->data.aevent;
2546 if (x->replay_esn) {
2547 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
2548 xfrm_replay_state_esn_len(x->replay_esn),
2551 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
2556 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2561 if (id->flags & XFRM_AE_RTHR) {
2562 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2566 if (id->flags & XFRM_AE_ETHR) {
2567 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2568 x->replay_maxage * 10 / HZ);
2572 err = xfrm_mark_put(skb, &x->mark);
2576 err = xfrm_if_id_put(skb, x->if_id);
2581 err = nla_put_u8(skb, XFRMA_SA_DIR, x->dir);
2586 nlmsg_end(skb, nlh);
2590 nlmsg_cancel(skb, nlh);
2594 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2595 struct nlattr **attrs, struct netlink_ext_ack *extack)
2597 struct net *net = sock_net(skb->sk);
2598 struct xfrm_state *x;
2599 struct sk_buff *r_skb;
2604 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2605 struct xfrm_usersa_id *id = &p->sa_id;
2607 mark = xfrm_mark_get(attrs, &m);
2609 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
2613 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2614 if (r_skb == NULL) {
2620 * XXX: is this lock really needed - none of the other
2621 * gets lock (the concern is things getting updated
2622 * while we are still reading) - jhs
2624 spin_lock_bh(&x->lock);
2625 c.data.aevent = p->flags;
2626 c.seq = nlh->nlmsg_seq;
2627 c.portid = nlh->nlmsg_pid;
2629 err = build_aevent(r_skb, x, &c);
2632 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
2633 spin_unlock_bh(&x->lock);
2638 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
2639 struct nlattr **attrs, struct netlink_ext_ack *extack)
2641 struct net *net = sock_net(skb->sk);
2642 struct xfrm_state *x;
2647 struct xfrm_aevent_id *p = nlmsg_data(nlh);
2648 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
2649 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
2650 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
2651 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2652 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
2654 if (!lt && !rp && !re && !et && !rt) {
2655 NL_SET_ERR_MSG(extack, "Missing required attribute for AE");
2659 /* pedantic mode - thou shalt sayeth replaceth */
2660 if (!(nlh->nlmsg_flags & NLM_F_REPLACE)) {
2661 NL_SET_ERR_MSG(extack, "NLM_F_REPLACE flag is required");
2665 mark = xfrm_mark_get(attrs, &m);
2667 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
2671 if (x->km.state != XFRM_STATE_VALID) {
2672 NL_SET_ERR_MSG(extack, "SA must be in VALID state");
2676 err = xfrm_replay_verify_len(x->replay_esn, re, extack);
2680 spin_lock_bh(&x->lock);
2681 xfrm_update_ae_params(x, attrs, 1);
2682 spin_unlock_bh(&x->lock);
2684 c.event = nlh->nlmsg_type;
2685 c.seq = nlh->nlmsg_seq;
2686 c.portid = nlh->nlmsg_pid;
2687 c.data.aevent = XFRM_AE_CU;
2688 km_state_notify(x, &c);
2695 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
2696 struct nlattr **attrs,
2697 struct netlink_ext_ack *extack)
2699 struct net *net = sock_net(skb->sk);
2701 u8 type = XFRM_POLICY_TYPE_MAIN;
2704 err = copy_from_user_policy_type(&type, attrs, extack);
2708 err = xfrm_policy_flush(net, type, true);
2710 if (err == -ESRCH) /* empty table */
2716 c.event = nlh->nlmsg_type;
2717 c.seq = nlh->nlmsg_seq;
2718 c.portid = nlh->nlmsg_pid;
2720 km_policy_notify(NULL, 0, &c);
2724 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2725 struct nlattr **attrs,
2726 struct netlink_ext_ack *extack)
2728 struct net *net = sock_net(skb->sk);
2729 struct xfrm_policy *xp;
2730 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
2731 struct xfrm_userpolicy_info *p = &up->pol;
2732 u8 type = XFRM_POLICY_TYPE_MAIN;
2737 err = copy_from_user_policy_type(&type, attrs, extack);
2741 err = verify_policy_dir(p->dir, extack);
2745 if (attrs[XFRMA_IF_ID])
2746 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2748 xfrm_mark_get(attrs, &m);
2751 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index,
2754 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
2755 struct xfrm_sec_ctx *ctx;
2757 err = verify_sec_ctx_len(attrs, extack);
2763 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
2765 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
2769 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2770 &p->sel, ctx, 0, &err);
2771 security_xfrm_policy_free(ctx);
2776 if (unlikely(xp->walk.dead))
2781 xfrm_policy_delete(xp, p->dir);
2782 xfrm_audit_policy_delete(xp, 1, true);
2784 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
2791 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
2792 struct nlattr **attrs,
2793 struct netlink_ext_ack *extack)
2795 struct net *net = sock_net(skb->sk);
2796 struct xfrm_state *x;
2798 struct xfrm_user_expire *ue = nlmsg_data(nlh);
2799 struct xfrm_usersa_info *p = &ue->state;
2801 u32 mark = xfrm_mark_get(attrs, &m);
2803 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2809 spin_lock_bh(&x->lock);
2811 if (x->km.state != XFRM_STATE_VALID) {
2812 NL_SET_ERR_MSG(extack, "SA must be in VALID state");
2816 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2819 __xfrm_state_delete(x);
2820 xfrm_audit_state_delete(x, 1, true);
2824 spin_unlock_bh(&x->lock);
2829 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2830 struct nlattr **attrs,
2831 struct netlink_ext_ack *extack)
2833 struct net *net = sock_net(skb->sk);
2834 struct xfrm_policy *xp;
2835 struct xfrm_user_tmpl *ut;
2837 struct nlattr *rt = attrs[XFRMA_TMPL];
2838 struct xfrm_mark mark;
2840 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2841 struct xfrm_state *x = xfrm_state_alloc(net);
2847 xfrm_mark_get(attrs, &mark);
2849 err = verify_newpolicy_info(&ua->policy, extack);
2852 err = verify_sec_ctx_len(attrs, extack);
2857 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack);
2861 memcpy(&x->id, &ua->id, sizeof(ua->id));
2862 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2863 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2864 xp->mark.m = x->mark.m = mark.m;
2865 xp->mark.v = x->mark.v = mark.v;
2867 /* extract the templates and for each call km_key */
2868 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2869 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2870 memcpy(&x->id, &t->id, sizeof(x->id));
2871 x->props.mode = t->mode;
2872 x->props.reqid = t->reqid;
2873 x->props.family = ut->family;
2874 t->aalgos = ua->aalgos;
2875 t->ealgos = ua->ealgos;
2876 t->calgos = ua->calgos;
2877 err = km_query(x, t, xp);
2892 #ifdef CONFIG_XFRM_MIGRATE
2893 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2894 struct xfrm_kmaddress *k,
2895 struct nlattr **attrs, int *num,
2896 struct netlink_ext_ack *extack)
2898 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2899 struct xfrm_user_migrate *um;
2903 struct xfrm_user_kmaddress *uk;
2905 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2906 memcpy(&k->local, &uk->local, sizeof(k->local));
2907 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2908 k->family = uk->family;
2909 k->reserved = uk->reserved;
2913 num_migrate = nla_len(rt) / sizeof(*um);
2915 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) {
2916 NL_SET_ERR_MSG(extack, "Invalid number of SAs to migrate, must be 0 < num <= XFRM_MAX_DEPTH (6)");
2920 for (i = 0; i < num_migrate; i++, um++, ma++) {
2921 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2922 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2923 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2924 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2926 ma->proto = um->proto;
2927 ma->mode = um->mode;
2928 ma->reqid = um->reqid;
2930 ma->old_family = um->old_family;
2931 ma->new_family = um->new_family;
2938 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2939 struct nlattr **attrs, struct netlink_ext_ack *extack)
2941 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2942 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2943 struct xfrm_kmaddress km, *kmp;
2947 struct net *net = sock_net(skb->sk);
2948 struct xfrm_encap_tmpl *encap = NULL;
2951 if (!attrs[XFRMA_MIGRATE]) {
2952 NL_SET_ERR_MSG(extack, "Missing required MIGRATE attribute");
2956 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2958 err = copy_from_user_policy_type(&type, attrs, extack);
2962 err = copy_from_user_migrate(m, kmp, attrs, &n, extack);
2969 if (attrs[XFRMA_ENCAP]) {
2970 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2971 sizeof(*encap), GFP_KERNEL);
2976 if (attrs[XFRMA_IF_ID])
2977 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2979 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap,
2987 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2988 struct nlattr **attrs, struct netlink_ext_ack *extack)
2990 return -ENOPROTOOPT;
2994 #ifdef CONFIG_XFRM_MIGRATE
2995 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2997 struct xfrm_user_migrate um;
2999 memset(&um, 0, sizeof(um));
3000 um.proto = m->proto;
3002 um.reqid = m->reqid;
3003 um.old_family = m->old_family;
3004 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
3005 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
3006 um.new_family = m->new_family;
3007 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
3008 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
3010 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
3013 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
3015 struct xfrm_user_kmaddress uk;
3017 memset(&uk, 0, sizeof(uk));
3018 uk.family = k->family;
3019 uk.reserved = k->reserved;
3020 memcpy(&uk.local, &k->local, sizeof(uk.local));
3021 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
3023 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
3026 static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
3029 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
3030 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
3031 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
3032 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
3033 + userpolicy_type_attrsize();
3036 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
3037 int num_migrate, const struct xfrm_kmaddress *k,
3038 const struct xfrm_selector *sel,
3039 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
3041 const struct xfrm_migrate *mp;
3042 struct xfrm_userpolicy_id *pol_id;
3043 struct nlmsghdr *nlh;
3046 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
3050 pol_id = nlmsg_data(nlh);
3051 /* copy data from selector, dir, and type to the pol_id */
3052 memset(pol_id, 0, sizeof(*pol_id));
3053 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
3057 err = copy_to_user_kmaddress(k, skb);
3062 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
3066 err = copy_to_user_policy_type(type, skb);
3069 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
3070 err = copy_to_user_migrate(mp, skb);
3075 nlmsg_end(skb, nlh);
3079 nlmsg_cancel(skb, nlh);
3083 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3084 const struct xfrm_migrate *m, int num_migrate,
3085 const struct xfrm_kmaddress *k,
3086 const struct xfrm_encap_tmpl *encap)
3088 struct net *net = &init_net;
3089 struct sk_buff *skb;
3092 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
3098 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
3101 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
3104 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
3105 const struct xfrm_migrate *m, int num_migrate,
3106 const struct xfrm_kmaddress *k,
3107 const struct xfrm_encap_tmpl *encap)
3109 return -ENOPROTOOPT;
3113 #define XMSGSIZE(type) sizeof(struct type)
3115 const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
3116 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
3117 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
3118 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
3119 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
3120 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
3121 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
3122 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
3123 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
3124 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
3125 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
3126 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
3127 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
3128 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
3129 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
3130 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
3131 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
3132 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
3133 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
3134 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
3135 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
3136 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
3137 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
3138 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
3140 EXPORT_SYMBOL_GPL(xfrm_msg_min);
3144 const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
3145 [XFRMA_UNSPEC] = { .strict_start_type = XFRMA_SA_DIR },
3146 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
3147 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
3148 [XFRMA_LASTUSED] = { .type = NLA_U64},
3149 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
3150 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
3151 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
3152 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
3153 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
3154 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
3155 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
3156 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) },
3157 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
3158 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
3159 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
3160 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
3161 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
3162 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
3163 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
3164 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
3165 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
3166 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
3167 [XFRMA_TFCPAD] = { .type = NLA_U32 },
3168 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
3169 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
3170 [XFRMA_PROTO] = { .type = NLA_U8 },
3171 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
3172 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
3173 [XFRMA_SET_MARK] = { .type = NLA_U32 },
3174 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
3175 [XFRMA_IF_ID] = { .type = NLA_U32 },
3176 [XFRMA_MTIMER_THRESH] = { .type = NLA_U32 },
3177 [XFRMA_SA_DIR] = NLA_POLICY_RANGE(NLA_U8, XFRM_SA_DIR_IN, XFRM_SA_DIR_OUT),
3178 [XFRMA_NAT_KEEPALIVE_INTERVAL] = { .type = NLA_U32 },
3180 EXPORT_SYMBOL_GPL(xfrma_policy);
3182 static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
3183 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
3184 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
3187 static const struct xfrm_link {
3188 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **,
3189 struct netlink_ext_ack *);
3190 int (*start)(struct netlink_callback *);
3191 int (*dump)(struct sk_buff *, struct netlink_callback *);
3192 int (*done)(struct netlink_callback *);
3193 const struct nla_policy *nla_pol;
3195 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
3196 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
3197 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
3198 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
3199 .dump = xfrm_dump_sa,
3200 .done = xfrm_dump_sa_done },
3201 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
3202 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
3203 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
3204 .start = xfrm_dump_policy_start,
3205 .dump = xfrm_dump_policy,
3206 .done = xfrm_dump_policy_done },
3207 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
3208 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
3209 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
3210 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
3211 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
3212 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
3213 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
3214 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
3215 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
3216 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
3217 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
3218 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
3219 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
3220 .nla_pol = xfrma_spd_policy,
3221 .nla_max = XFRMA_SPD_MAX },
3222 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
3223 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default },
3224 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default },
3227 static int xfrm_reject_unused_attr(int type, struct nlattr **attrs,
3228 struct netlink_ext_ack *extack)
3230 if (attrs[XFRMA_SA_DIR]) {
3232 case XFRM_MSG_NEWSA:
3233 case XFRM_MSG_UPDSA:
3234 case XFRM_MSG_ALLOCSPI:
3237 NL_SET_ERR_MSG(extack, "Invalid attribute SA_DIR");
3245 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
3246 struct netlink_ext_ack *extack)
3248 struct net *net = sock_net(skb->sk);
3249 struct nlattr *attrs[XFRMA_MAX+1];
3250 const struct xfrm_link *link;
3251 struct nlmsghdr *nlh64 = NULL;
3254 type = nlh->nlmsg_type;
3255 if (type > XFRM_MSG_MAX)
3258 type -= XFRM_MSG_BASE;
3259 link = &xfrm_dispatch[type];
3261 /* All operations require privileges, even GET */
3262 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
3265 if (in_compat_syscall()) {
3266 struct xfrm_translator *xtr = xfrm_get_translator();
3271 nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max,
3272 link->nla_pol, extack);
3273 xfrm_put_translator(xtr);
3275 return PTR_ERR(nlh64);
3280 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
3281 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
3282 (nlh->nlmsg_flags & NLM_F_DUMP)) {
3283 struct netlink_dump_control c = {
3284 .start = link->start,
3289 if (link->dump == NULL) {
3294 err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
3298 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
3299 link->nla_max ? : XFRMA_MAX,
3300 link->nla_pol ? : xfrma_policy, extack);
3304 if (!link->nla_pol || link->nla_pol == xfrma_policy) {
3305 err = xfrm_reject_unused_attr((type + XFRM_MSG_BASE), attrs, extack);
3310 if (link->doit == NULL) {
3315 err = link->doit(skb, nlh, attrs, extack);
3317 /* We need to free skb allocated in xfrm_alloc_compat() before
3318 * returning from this function, because consume_skb() won't take
3319 * care of frag_list since netlink destructor sets
3320 * sbk->head to NULL. (see netlink_skb_destructor())
3322 if (skb_has_frag_list(skb)) {
3323 kfree_skb(skb_shinfo(skb)->frag_list);
3324 skb_shinfo(skb)->frag_list = NULL;
3332 static void xfrm_netlink_rcv(struct sk_buff *skb)
3334 struct net *net = sock_net(skb->sk);
3336 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
3337 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
3338 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
3341 static inline unsigned int xfrm_expire_msgsize(void)
3343 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) +
3344 nla_total_size(sizeof(struct xfrm_mark)) +
3345 nla_total_size(sizeof_field(struct xfrm_state, dir));
3348 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
3350 struct xfrm_user_expire *ue;
3351 struct nlmsghdr *nlh;
3354 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
3358 ue = nlmsg_data(nlh);
3359 copy_to_user_state(x, &ue->state);
3360 ue->hard = (c->data.hard != 0) ? 1 : 0;
3361 /* clear the padding bytes */
3362 memset_after(ue, 0, hard);
3364 err = xfrm_mark_put(skb, &x->mark);
3368 err = xfrm_if_id_put(skb, x->if_id);
3373 err = nla_put_u8(skb, XFRMA_SA_DIR, x->dir);
3378 nlmsg_end(skb, nlh);
3382 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
3384 struct net *net = xs_net(x);
3385 struct sk_buff *skb;
3387 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
3391 if (build_expire(skb, x, c) < 0) {
3396 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3399 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
3401 struct net *net = xs_net(x);
3402 struct sk_buff *skb;
3405 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
3409 err = build_aevent(skb, x, c);
3412 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
3415 static int xfrm_notify_sa_flush(const struct km_event *c)
3417 struct net *net = c->net;
3418 struct xfrm_usersa_flush *p;
3419 struct nlmsghdr *nlh;
3420 struct sk_buff *skb;
3421 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
3423 skb = nlmsg_new(len, GFP_ATOMIC);
3427 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
3433 p = nlmsg_data(nlh);
3434 p->proto = c->data.proto;
3436 nlmsg_end(skb, nlh);
3438 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3441 static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
3445 l += nla_total_size(aead_len(x->aead));
3447 l += nla_total_size(sizeof(struct xfrm_algo) +
3448 (x->aalg->alg_key_len + 7) / 8);
3449 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
3452 l += nla_total_size(xfrm_alg_len(x->ealg));
3454 l += nla_total_size(sizeof(*x->calg));
3456 l += nla_total_size(sizeof(*x->encap));
3458 l += nla_total_size(sizeof(x->tfcpad));
3460 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
3462 l += nla_total_size(sizeof(struct xfrm_replay_state));
3464 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
3465 x->security->ctx_len);
3467 l += nla_total_size(sizeof(*x->coaddr));
3468 if (x->props.extra_flags)
3469 l += nla_total_size(sizeof(x->props.extra_flags));
3471 l += nla_total_size(sizeof(struct xfrm_user_offload));
3472 if (x->props.smark.v | x->props.smark.m) {
3473 l += nla_total_size(sizeof(x->props.smark.v));
3474 l += nla_total_size(sizeof(x->props.smark.m));
3477 l += nla_total_size(sizeof(x->if_id));
3479 /* Must count x->lastused as it may become non-zero behind our back. */
3480 l += nla_total_size_64bit(sizeof(u64));
3482 if (x->mapping_maxage)
3483 l += nla_total_size(sizeof(x->mapping_maxage));
3486 l += nla_total_size(sizeof(x->dir));
3488 if (x->nat_keepalive_interval)
3489 l += nla_total_size(sizeof(x->nat_keepalive_interval));
3494 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
3496 struct net *net = xs_net(x);
3497 struct xfrm_usersa_info *p;
3498 struct xfrm_usersa_id *id;
3499 struct nlmsghdr *nlh;
3500 struct sk_buff *skb;
3501 unsigned int len = xfrm_sa_len(x);
3502 unsigned int headlen;
3505 headlen = sizeof(*p);
3506 if (c->event == XFRM_MSG_DELSA) {
3507 len += nla_total_size(headlen);
3508 headlen = sizeof(*id);
3509 len += nla_total_size(sizeof(struct xfrm_mark));
3511 len += NLMSG_ALIGN(headlen);
3513 skb = nlmsg_new(len, GFP_ATOMIC);
3517 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3522 p = nlmsg_data(nlh);
3523 if (c->event == XFRM_MSG_DELSA) {
3524 struct nlattr *attr;
3526 id = nlmsg_data(nlh);
3527 memset(id, 0, sizeof(*id));
3528 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
3529 id->spi = x->id.spi;
3530 id->family = x->props.family;
3531 id->proto = x->id.proto;
3533 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
3540 err = copy_to_user_state_extra(x, p, skb);
3544 nlmsg_end(skb, nlh);
3546 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
3553 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
3557 case XFRM_MSG_EXPIRE:
3558 return xfrm_exp_state_notify(x, c);
3559 case XFRM_MSG_NEWAE:
3560 return xfrm_aevent_state_notify(x, c);
3561 case XFRM_MSG_DELSA:
3562 case XFRM_MSG_UPDSA:
3563 case XFRM_MSG_NEWSA:
3564 return xfrm_notify_sa(x, c);
3565 case XFRM_MSG_FLUSHSA:
3566 return xfrm_notify_sa_flush(c);
3568 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
3577 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
3578 struct xfrm_policy *xp)
3580 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
3581 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3582 + nla_total_size(sizeof(struct xfrm_mark))
3583 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
3584 + userpolicy_type_attrsize();
3587 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
3588 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
3590 __u32 seq = xfrm_get_acqseq();
3591 struct xfrm_user_acquire *ua;
3592 struct nlmsghdr *nlh;
3595 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
3599 ua = nlmsg_data(nlh);
3600 memcpy(&ua->id, &x->id, sizeof(ua->id));
3601 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
3602 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
3603 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
3604 ua->aalgos = xt->aalgos;
3605 ua->ealgos = xt->ealgos;
3606 ua->calgos = xt->calgos;
3607 ua->seq = x->km.seq = seq;
3609 err = copy_to_user_tmpl(xp, skb);
3611 err = copy_to_user_state_sec_ctx(x, skb);
3613 err = copy_to_user_policy_type(xp->type, skb);
3615 err = xfrm_mark_put(skb, &xp->mark);
3617 err = xfrm_if_id_put(skb, xp->if_id);
3618 if (!err && xp->xdo.dev)
3619 err = copy_user_offload(&xp->xdo, skb);
3621 nlmsg_cancel(skb, nlh);
3625 nlmsg_end(skb, nlh);
3629 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
3630 struct xfrm_policy *xp)
3632 struct net *net = xs_net(x);
3633 struct sk_buff *skb;
3636 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
3640 err = build_acquire(skb, x, xt, xp);
3643 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
3646 /* User gives us xfrm_user_policy_info followed by an array of 0
3647 * or more templates.
3649 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
3650 u8 *data, int len, int *dir)
3652 struct net *net = sock_net(sk);
3653 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
3654 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
3655 struct xfrm_policy *xp;
3658 switch (sk->sk_family) {
3660 if (opt != IP_XFRM_POLICY) {
3665 #if IS_ENABLED(CONFIG_IPV6)
3667 if (opt != IPV6_XFRM_POLICY) {
3680 if (len < sizeof(*p) ||
3681 verify_newpolicy_info(p, NULL))
3684 nr = ((len - sizeof(*p)) / sizeof(*ut));
3685 if (validate_tmpl(nr, ut, p->sel.family, p->dir, NULL))
3688 if (p->dir > XFRM_POLICY_OUT)
3691 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
3697 copy_from_user_policy(xp, p);
3698 xp->type = XFRM_POLICY_TYPE_MAIN;
3699 copy_templates(xp, ut, nr);
3706 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
3708 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3709 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3710 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
3711 + nla_total_size(sizeof(struct xfrm_mark))
3712 + userpolicy_type_attrsize();
3715 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
3716 int dir, const struct km_event *c)
3718 struct xfrm_user_polexpire *upe;
3719 int hard = c->data.hard;
3720 struct nlmsghdr *nlh;
3723 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
3727 upe = nlmsg_data(nlh);
3728 copy_to_user_policy(xp, &upe->pol, dir);
3729 err = copy_to_user_tmpl(xp, skb);
3731 err = copy_to_user_sec_ctx(xp, skb);
3733 err = copy_to_user_policy_type(xp->type, skb);
3735 err = xfrm_mark_put(skb, &xp->mark);
3737 err = xfrm_if_id_put(skb, xp->if_id);
3738 if (!err && xp->xdo.dev)
3739 err = copy_user_offload(&xp->xdo, skb);
3741 nlmsg_cancel(skb, nlh);
3746 nlmsg_end(skb, nlh);
3750 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3752 struct net *net = xp_net(xp);
3753 struct sk_buff *skb;
3756 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
3760 err = build_polexpire(skb, xp, dir, c);
3763 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
3766 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
3768 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
3769 struct net *net = xp_net(xp);
3770 struct xfrm_userpolicy_info *p;
3771 struct xfrm_userpolicy_id *id;
3772 struct nlmsghdr *nlh;
3773 struct sk_buff *skb;
3774 unsigned int headlen;
3777 headlen = sizeof(*p);
3778 if (c->event == XFRM_MSG_DELPOLICY) {
3779 len += nla_total_size(headlen);
3780 headlen = sizeof(*id);
3782 len += userpolicy_type_attrsize();
3783 len += nla_total_size(sizeof(struct xfrm_mark));
3784 len += NLMSG_ALIGN(headlen);
3786 skb = nlmsg_new(len, GFP_ATOMIC);
3790 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
3795 p = nlmsg_data(nlh);
3796 if (c->event == XFRM_MSG_DELPOLICY) {
3797 struct nlattr *attr;
3799 id = nlmsg_data(nlh);
3800 memset(id, 0, sizeof(*id));
3803 id->index = xp->index;
3805 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3807 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
3815 copy_to_user_policy(xp, p, dir);
3816 err = copy_to_user_tmpl(xp, skb);
3818 err = copy_to_user_policy_type(xp->type, skb);
3820 err = xfrm_mark_put(skb, &xp->mark);
3822 err = xfrm_if_id_put(skb, xp->if_id);
3823 if (!err && xp->xdo.dev)
3824 err = copy_user_offload(&xp->xdo, skb);
3828 nlmsg_end(skb, nlh);
3830 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3837 static int xfrm_notify_policy_flush(const struct km_event *c)
3839 struct net *net = c->net;
3840 struct nlmsghdr *nlh;
3841 struct sk_buff *skb;
3844 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
3848 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
3852 err = copy_to_user_policy_type(c->data.type, skb);
3856 nlmsg_end(skb, nlh);
3858 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
3865 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
3869 case XFRM_MSG_NEWPOLICY:
3870 case XFRM_MSG_UPDPOLICY:
3871 case XFRM_MSG_DELPOLICY:
3872 return xfrm_notify_policy(xp, dir, c);
3873 case XFRM_MSG_FLUSHPOLICY:
3874 return xfrm_notify_policy_flush(c);
3875 case XFRM_MSG_POLEXPIRE:
3876 return xfrm_exp_policy_notify(xp, dir, c);
3878 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3886 static inline unsigned int xfrm_report_msgsize(void)
3888 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3891 static int build_report(struct sk_buff *skb, u8 proto,
3892 struct xfrm_selector *sel, xfrm_address_t *addr)
3894 struct xfrm_user_report *ur;
3895 struct nlmsghdr *nlh;
3897 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3901 ur = nlmsg_data(nlh);
3903 memcpy(&ur->sel, sel, sizeof(ur->sel));
3906 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3908 nlmsg_cancel(skb, nlh);
3912 nlmsg_end(skb, nlh);
3916 static int xfrm_send_report(struct net *net, u8 proto,
3917 struct xfrm_selector *sel, xfrm_address_t *addr)
3919 struct sk_buff *skb;
3922 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
3926 err = build_report(skb, proto, sel, addr);
3929 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
3932 static inline unsigned int xfrm_mapping_msgsize(void)
3934 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3937 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3938 xfrm_address_t *new_saddr, __be16 new_sport)
3940 struct xfrm_user_mapping *um;
3941 struct nlmsghdr *nlh;
3943 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3947 um = nlmsg_data(nlh);
3949 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3950 um->id.spi = x->id.spi;
3951 um->id.family = x->props.family;
3952 um->id.proto = x->id.proto;
3953 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3954 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3955 um->new_sport = new_sport;
3956 um->old_sport = x->encap->encap_sport;
3957 um->reqid = x->props.reqid;
3959 nlmsg_end(skb, nlh);
3963 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3966 struct net *net = xs_net(x);
3967 struct sk_buff *skb;
3970 if (x->id.proto != IPPROTO_ESP)
3976 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3980 err = build_mapping(skb, x, ipaddr, sport);
3983 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3986 static bool xfrm_is_alive(const struct km_event *c)
3988 return (bool)xfrm_acquire_is_on(c->net);
3991 static struct xfrm_mgr netlink_mgr = {
3992 .notify = xfrm_send_state_notify,
3993 .acquire = xfrm_send_acquire,
3994 .compile_policy = xfrm_compile_policy,
3995 .notify_policy = xfrm_send_policy_notify,
3996 .report = xfrm_send_report,
3997 .migrate = xfrm_send_migrate,
3998 .new_mapping = xfrm_send_mapping,
3999 .is_alive = xfrm_is_alive,
4002 static int __net_init xfrm_user_net_init(struct net *net)
4005 struct netlink_kernel_cfg cfg = {
4006 .groups = XFRMNLGRP_MAX,
4007 .input = xfrm_netlink_rcv,
4010 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
4013 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
4014 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
4018 static void __net_exit xfrm_user_net_pre_exit(struct net *net)
4020 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
4023 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
4027 list_for_each_entry(net, net_exit_list, exit_list)
4028 netlink_kernel_release(net->xfrm.nlsk_stash);
4031 static struct pernet_operations xfrm_user_net_ops = {
4032 .init = xfrm_user_net_init,
4033 .pre_exit = xfrm_user_net_pre_exit,
4034 .exit_batch = xfrm_user_net_exit,
4037 static int __init xfrm_user_init(void)
4041 printk(KERN_INFO "Initializing XFRM netlink socket\n");
4043 rv = register_pernet_subsys(&xfrm_user_net_ops);
4046 xfrm_register_km(&netlink_mgr);
4050 static void __exit xfrm_user_exit(void)
4052 xfrm_unregister_km(&netlink_mgr);
4053 unregister_pernet_subsys(&xfrm_user_net_ops);
4056 module_init(xfrm_user_init);
4057 module_exit(xfrm_user_exit);
4058 MODULE_DESCRIPTION("XFRM User interface");
4059 MODULE_LICENSE("GPL");
4060 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);