1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
30 #include <asm/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
35 static inline int aead_len(struct xfrm_algo_aead *alg)
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
40 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
42 struct nlattr *rt = attrs[type];
43 struct xfrm_algo *algp;
49 if (nla_len(rt) < xfrm_alg_len(algp))
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
66 static int verify_auth_trunc(struct nlattr **attrs)
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
82 static int verify_aead(struct nlattr **attrs)
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
91 if (nla_len(rt) < aead_len(algp))
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
98 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
99 xfrm_address_t **addrp)
101 struct nlattr *rt = attrs[type];
104 *addrp = nla_data(rt);
107 static inline int verify_sec_ctx_len(struct nlattr **attrs)
109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
110 struct xfrm_user_sec_ctx *uctx;
116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
122 static inline int verify_replay(struct xfrm_usersa_info *p,
123 struct nlattr **attrs)
125 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
127 if ((p->flags & XFRM_STATE_ESN) && !rt)
133 if (p->id.proto != IPPROTO_ESP)
136 if (p->replay_window != 0)
142 static int verify_newsa_info(struct xfrm_usersa_info *p,
143 struct nlattr **attrs)
153 #if IS_ENABLED(CONFIG_IPV6)
165 switch (p->id.proto) {
167 if ((!attrs[XFRMA_ALG_AUTH] &&
168 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
169 attrs[XFRMA_ALG_AEAD] ||
170 attrs[XFRMA_ALG_CRYPT] ||
171 attrs[XFRMA_ALG_COMP] ||
177 if (attrs[XFRMA_ALG_COMP])
179 if (!attrs[XFRMA_ALG_AUTH] &&
180 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
181 !attrs[XFRMA_ALG_CRYPT] &&
182 !attrs[XFRMA_ALG_AEAD])
184 if ((attrs[XFRMA_ALG_AUTH] ||
185 attrs[XFRMA_ALG_AUTH_TRUNC] ||
186 attrs[XFRMA_ALG_CRYPT]) &&
187 attrs[XFRMA_ALG_AEAD])
189 if (attrs[XFRMA_TFCPAD] &&
190 p->mode != XFRM_MODE_TUNNEL)
195 if (!attrs[XFRMA_ALG_COMP] ||
196 attrs[XFRMA_ALG_AEAD] ||
197 attrs[XFRMA_ALG_AUTH] ||
198 attrs[XFRMA_ALG_AUTH_TRUNC] ||
199 attrs[XFRMA_ALG_CRYPT] ||
204 #if IS_ENABLED(CONFIG_IPV6)
205 case IPPROTO_DSTOPTS:
206 case IPPROTO_ROUTING:
207 if (attrs[XFRMA_ALG_COMP] ||
208 attrs[XFRMA_ALG_AUTH] ||
209 attrs[XFRMA_ALG_AUTH_TRUNC] ||
210 attrs[XFRMA_ALG_AEAD] ||
211 attrs[XFRMA_ALG_CRYPT] ||
212 attrs[XFRMA_ENCAP] ||
213 attrs[XFRMA_SEC_CTX] ||
214 attrs[XFRMA_TFCPAD] ||
215 !attrs[XFRMA_COADDR])
224 if ((err = verify_aead(attrs)))
226 if ((err = verify_auth_trunc(attrs)))
228 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
230 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
232 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
234 if ((err = verify_sec_ctx_len(attrs)))
236 if ((err = verify_replay(p, attrs)))
241 case XFRM_MODE_TRANSPORT:
242 case XFRM_MODE_TUNNEL:
243 case XFRM_MODE_ROUTEOPTIMIZATION:
257 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
258 struct xfrm_algo_desc *(*get_byname)(const char *, int),
261 struct xfrm_algo *p, *ualg;
262 struct xfrm_algo_desc *algo;
267 ualg = nla_data(rta);
269 algo = get_byname(ualg->alg_name, 1);
272 *props = algo->desc.sadb_alg_id;
274 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
278 strcpy(p->alg_name, algo->name);
283 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
286 struct xfrm_algo *ualg;
287 struct xfrm_algo_auth *p;
288 struct xfrm_algo_desc *algo;
293 ualg = nla_data(rta);
295 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
298 *props = algo->desc.sadb_alg_id;
300 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
304 strcpy(p->alg_name, algo->name);
305 p->alg_key_len = ualg->alg_key_len;
306 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
307 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
313 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
316 struct xfrm_algo_auth *p, *ualg;
317 struct xfrm_algo_desc *algo;
322 ualg = nla_data(rta);
324 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
327 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
328 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
330 *props = algo->desc.sadb_alg_id;
332 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
336 strcpy(p->alg_name, algo->name);
337 if (!p->alg_trunc_len)
338 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
344 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
347 struct xfrm_algo_aead *p, *ualg;
348 struct xfrm_algo_desc *algo;
353 ualg = nla_data(rta);
355 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
358 *props = algo->desc.sadb_alg_id;
360 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
364 strcpy(p->alg_name, algo->name);
369 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
372 struct xfrm_replay_state_esn *up;
374 if (!replay_esn || !rp)
379 if (xfrm_replay_state_esn_len(replay_esn) !=
380 xfrm_replay_state_esn_len(up))
386 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
387 struct xfrm_replay_state_esn **preplay_esn,
390 struct xfrm_replay_state_esn *p, *pp, *up;
397 p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
401 pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
413 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
418 len += sizeof(struct xfrm_user_sec_ctx);
419 len += xfrm_ctx->ctx_len;
424 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
426 memcpy(&x->id, &p->id, sizeof(x->id));
427 memcpy(&x->sel, &p->sel, sizeof(x->sel));
428 memcpy(&x->lft, &p->lft, sizeof(x->lft));
429 x->props.mode = p->mode;
430 x->props.replay_window = p->replay_window;
431 x->props.reqid = p->reqid;
432 x->props.family = p->family;
433 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
434 x->props.flags = p->flags;
436 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
437 x->sel.family = p->family;
441 * someday when pfkey also has support, we could have the code
442 * somehow made shareable and move it to xfrm_state.c - JHS
445 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
447 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
448 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
449 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
450 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
451 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
454 struct xfrm_replay_state_esn *replay_esn;
455 replay_esn = nla_data(re);
456 memcpy(x->replay_esn, replay_esn,
457 xfrm_replay_state_esn_len(replay_esn));
458 memcpy(x->preplay_esn, replay_esn,
459 xfrm_replay_state_esn_len(replay_esn));
463 struct xfrm_replay_state *replay;
464 replay = nla_data(rp);
465 memcpy(&x->replay, replay, sizeof(*replay));
466 memcpy(&x->preplay, replay, sizeof(*replay));
470 struct xfrm_lifetime_cur *ltime;
471 ltime = nla_data(lt);
472 x->curlft.bytes = ltime->bytes;
473 x->curlft.packets = ltime->packets;
474 x->curlft.add_time = ltime->add_time;
475 x->curlft.use_time = ltime->use_time;
479 x->replay_maxage = nla_get_u32(et);
482 x->replay_maxdiff = nla_get_u32(rt);
485 static struct xfrm_state *xfrm_state_construct(struct net *net,
486 struct xfrm_usersa_info *p,
487 struct nlattr **attrs,
490 struct xfrm_state *x = xfrm_state_alloc(net);
496 copy_from_user_state(x, p);
498 if ((err = attach_aead(&x->aead, &x->props.ealgo,
499 attrs[XFRMA_ALG_AEAD])))
501 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
502 attrs[XFRMA_ALG_AUTH_TRUNC])))
504 if (!x->props.aalgo) {
505 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
506 attrs[XFRMA_ALG_AUTH])))
509 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
510 xfrm_ealg_get_byname,
511 attrs[XFRMA_ALG_CRYPT])))
513 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
514 xfrm_calg_get_byname,
515 attrs[XFRMA_ALG_COMP])))
518 if (attrs[XFRMA_ENCAP]) {
519 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
520 sizeof(*x->encap), GFP_KERNEL);
521 if (x->encap == NULL)
525 if (attrs[XFRMA_TFCPAD])
526 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
528 if (attrs[XFRMA_COADDR]) {
529 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
530 sizeof(*x->coaddr), GFP_KERNEL);
531 if (x->coaddr == NULL)
535 xfrm_mark_get(attrs, &x->mark);
537 err = __xfrm_init_state(x, false);
541 if (attrs[XFRMA_SEC_CTX] &&
542 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
545 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
546 attrs[XFRMA_REPLAY_ESN_VAL])))
550 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
551 /* sysctl_xfrm_aevent_etime is in 100ms units */
552 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
554 if ((err = xfrm_init_replay(x)))
557 /* override default values from above */
558 xfrm_update_ae_params(x, attrs);
563 x->km.state = XFRM_STATE_DEAD;
570 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
571 struct nlattr **attrs)
573 struct net *net = sock_net(skb->sk);
574 struct xfrm_usersa_info *p = nlmsg_data(nlh);
575 struct xfrm_state *x;
578 uid_t loginuid = audit_get_loginuid(current);
579 u32 sessionid = audit_get_sessionid(current);
582 err = verify_newsa_info(p, attrs);
586 x = xfrm_state_construct(net, p, attrs, &err);
591 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
592 err = xfrm_state_add(x);
594 err = xfrm_state_update(x);
596 security_task_getsecid(current, &sid);
597 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
600 x->km.state = XFRM_STATE_DEAD;
605 c.seq = nlh->nlmsg_seq;
606 c.pid = nlh->nlmsg_pid;
607 c.event = nlh->nlmsg_type;
609 km_state_notify(x, &c);
615 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
616 struct xfrm_usersa_id *p,
617 struct nlattr **attrs,
620 struct xfrm_state *x = NULL;
623 u32 mark = xfrm_mark_get(attrs, &m);
625 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
627 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
629 xfrm_address_t *saddr = NULL;
631 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
638 x = xfrm_state_lookup_byaddr(net, mark,
640 p->proto, p->family);
649 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
650 struct nlattr **attrs)
652 struct net *net = sock_net(skb->sk);
653 struct xfrm_state *x;
656 struct xfrm_usersa_id *p = nlmsg_data(nlh);
657 uid_t loginuid = audit_get_loginuid(current);
658 u32 sessionid = audit_get_sessionid(current);
661 x = xfrm_user_state_lookup(net, p, attrs, &err);
665 if ((err = security_xfrm_state_delete(x)) != 0)
668 if (xfrm_state_kern(x)) {
673 err = xfrm_state_delete(x);
678 c.seq = nlh->nlmsg_seq;
679 c.pid = nlh->nlmsg_pid;
680 c.event = nlh->nlmsg_type;
681 km_state_notify(x, &c);
684 security_task_getsecid(current, &sid);
685 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
690 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
692 memcpy(&p->id, &x->id, sizeof(p->id));
693 memcpy(&p->sel, &x->sel, sizeof(p->sel));
694 memcpy(&p->lft, &x->lft, sizeof(p->lft));
695 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
696 memcpy(&p->stats, &x->stats, sizeof(p->stats));
697 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
698 p->mode = x->props.mode;
699 p->replay_window = x->props.replay_window;
700 p->reqid = x->props.reqid;
701 p->family = x->props.family;
702 p->flags = x->props.flags;
706 struct xfrm_dump_info {
707 struct sk_buff *in_skb;
708 struct sk_buff *out_skb;
713 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
715 struct xfrm_user_sec_ctx *uctx;
717 int ctx_size = sizeof(*uctx) + s->ctx_len;
719 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
723 uctx = nla_data(attr);
724 uctx->exttype = XFRMA_SEC_CTX;
725 uctx->len = ctx_size;
726 uctx->ctx_doi = s->ctx_doi;
727 uctx->ctx_alg = s->ctx_alg;
728 uctx->ctx_len = s->ctx_len;
729 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
734 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
736 struct xfrm_algo *algo;
739 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
740 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
744 algo = nla_data(nla);
745 strcpy(algo->alg_name, auth->alg_name);
746 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
747 algo->alg_key_len = auth->alg_key_len;
752 /* Don't change this without updating xfrm_sa_len! */
753 static int copy_to_user_state_extra(struct xfrm_state *x,
754 struct xfrm_usersa_info *p,
757 copy_to_user_state(x, p);
760 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
763 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
766 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
768 if (copy_to_user_auth(x->aalg, skb))
769 goto nla_put_failure;
771 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
772 xfrm_alg_auth_len(x->aalg), x->aalg);
775 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
777 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
780 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
783 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
785 if (xfrm_mark_put(skb, &x->mark))
786 goto nla_put_failure;
789 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
790 xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
792 if (x->security && copy_sec_ctx(x->security, skb) < 0)
793 goto nla_put_failure;
801 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
803 struct xfrm_dump_info *sp = ptr;
804 struct sk_buff *in_skb = sp->in_skb;
805 struct sk_buff *skb = sp->out_skb;
806 struct xfrm_usersa_info *p;
807 struct nlmsghdr *nlh;
810 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
811 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
817 err = copy_to_user_state_extra(x, p, skb);
819 goto nla_put_failure;
825 nlmsg_cancel(skb, nlh);
829 static int xfrm_dump_sa_done(struct netlink_callback *cb)
831 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
832 xfrm_state_walk_done(walk);
836 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
838 struct net *net = sock_net(skb->sk);
839 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
840 struct xfrm_dump_info info;
842 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
843 sizeof(cb->args) - sizeof(cb->args[0]));
845 info.in_skb = cb->skb;
847 info.nlmsg_seq = cb->nlh->nlmsg_seq;
848 info.nlmsg_flags = NLM_F_MULTI;
852 xfrm_state_walk_init(walk, 0);
855 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
860 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
861 struct xfrm_state *x, u32 seq)
863 struct xfrm_dump_info info;
867 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
869 return ERR_PTR(-ENOMEM);
871 info.in_skb = in_skb;
873 info.nlmsg_seq = seq;
874 info.nlmsg_flags = 0;
876 err = dump_one_state(x, 0, &info);
885 static inline size_t xfrm_spdinfo_msgsize(void)
887 return NLMSG_ALIGN(4)
888 + nla_total_size(sizeof(struct xfrmu_spdinfo))
889 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
892 static int build_spdinfo(struct sk_buff *skb, struct net *net,
893 u32 pid, u32 seq, u32 flags)
895 struct xfrmk_spdinfo si;
896 struct xfrmu_spdinfo spc;
897 struct xfrmu_spdhinfo sph;
898 struct nlmsghdr *nlh;
901 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
902 if (nlh == NULL) /* shouldn't really happen ... */
907 xfrm_spd_getinfo(net, &si);
908 spc.incnt = si.incnt;
909 spc.outcnt = si.outcnt;
910 spc.fwdcnt = si.fwdcnt;
911 spc.inscnt = si.inscnt;
912 spc.outscnt = si.outscnt;
913 spc.fwdscnt = si.fwdscnt;
914 sph.spdhcnt = si.spdhcnt;
915 sph.spdhmcnt = si.spdhmcnt;
917 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
918 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
920 return nlmsg_end(skb, nlh);
923 nlmsg_cancel(skb, nlh);
927 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
928 struct nlattr **attrs)
930 struct net *net = sock_net(skb->sk);
931 struct sk_buff *r_skb;
932 u32 *flags = nlmsg_data(nlh);
933 u32 spid = NETLINK_CB(skb).pid;
934 u32 seq = nlh->nlmsg_seq;
936 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
940 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
943 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
946 static inline size_t xfrm_sadinfo_msgsize(void)
948 return NLMSG_ALIGN(4)
949 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
950 + nla_total_size(4); /* XFRMA_SAD_CNT */
953 static int build_sadinfo(struct sk_buff *skb, struct net *net,
954 u32 pid, u32 seq, u32 flags)
956 struct xfrmk_sadinfo si;
957 struct xfrmu_sadhinfo sh;
958 struct nlmsghdr *nlh;
961 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
962 if (nlh == NULL) /* shouldn't really happen ... */
967 xfrm_sad_getinfo(net, &si);
969 sh.sadhmcnt = si.sadhmcnt;
970 sh.sadhcnt = si.sadhcnt;
972 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
973 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
975 return nlmsg_end(skb, nlh);
978 nlmsg_cancel(skb, nlh);
982 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
983 struct nlattr **attrs)
985 struct net *net = sock_net(skb->sk);
986 struct sk_buff *r_skb;
987 u32 *flags = nlmsg_data(nlh);
988 u32 spid = NETLINK_CB(skb).pid;
989 u32 seq = nlh->nlmsg_seq;
991 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
995 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
998 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
1001 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1002 struct nlattr **attrs)
1004 struct net *net = sock_net(skb->sk);
1005 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1006 struct xfrm_state *x;
1007 struct sk_buff *resp_skb;
1010 x = xfrm_user_state_lookup(net, p, attrs, &err);
1014 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1015 if (IS_ERR(resp_skb)) {
1016 err = PTR_ERR(resp_skb);
1018 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1025 static int verify_userspi_info(struct xfrm_userspi_info *p)
1027 switch (p->info.id.proto) {
1033 /* IPCOMP spi is 16-bits. */
1034 if (p->max >= 0x10000)
1042 if (p->min > p->max)
1048 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1049 struct nlattr **attrs)
1051 struct net *net = sock_net(skb->sk);
1052 struct xfrm_state *x;
1053 struct xfrm_userspi_info *p;
1054 struct sk_buff *resp_skb;
1055 xfrm_address_t *daddr;
1061 p = nlmsg_data(nlh);
1062 err = verify_userspi_info(p);
1066 family = p->info.family;
1067 daddr = &p->info.id.daddr;
1071 mark = xfrm_mark_get(attrs, &m);
1073 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1074 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1081 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1082 p->info.id.proto, daddr,
1089 err = xfrm_alloc_spi(x, p->min, p->max);
1093 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1094 if (IS_ERR(resp_skb)) {
1095 err = PTR_ERR(resp_skb);
1099 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1107 static int verify_policy_dir(u8 dir)
1110 case XFRM_POLICY_IN:
1111 case XFRM_POLICY_OUT:
1112 case XFRM_POLICY_FWD:
1122 static int verify_policy_type(u8 type)
1125 case XFRM_POLICY_TYPE_MAIN:
1126 #ifdef CONFIG_XFRM_SUB_POLICY
1127 case XFRM_POLICY_TYPE_SUB:
1138 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1141 case XFRM_SHARE_ANY:
1142 case XFRM_SHARE_SESSION:
1143 case XFRM_SHARE_USER:
1144 case XFRM_SHARE_UNIQUE:
1151 switch (p->action) {
1152 case XFRM_POLICY_ALLOW:
1153 case XFRM_POLICY_BLOCK:
1160 switch (p->sel.family) {
1165 #if IS_ENABLED(CONFIG_IPV6)
1168 return -EAFNOSUPPORT;
1175 return verify_policy_dir(p->dir);
1178 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1180 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1181 struct xfrm_user_sec_ctx *uctx;
1186 uctx = nla_data(rt);
1187 return security_xfrm_policy_alloc(&pol->security, uctx);
1190 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1196 for (i = 0; i < nr; i++, ut++) {
1197 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1199 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1200 memcpy(&t->saddr, &ut->saddr,
1201 sizeof(xfrm_address_t));
1202 t->reqid = ut->reqid;
1204 t->share = ut->share;
1205 t->optional = ut->optional;
1206 t->aalgos = ut->aalgos;
1207 t->ealgos = ut->ealgos;
1208 t->calgos = ut->calgos;
1209 /* If all masks are ~0, then we allow all algorithms. */
1210 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1211 t->encap_family = ut->family;
1215 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1219 if (nr > XFRM_MAX_DEPTH)
1222 for (i = 0; i < nr; i++) {
1223 /* We never validated the ut->family value, so many
1224 * applications simply leave it at zero. The check was
1225 * never made and ut->family was ignored because all
1226 * templates could be assumed to have the same family as
1227 * the policy itself. Now that we will have ipv4-in-ipv6
1228 * and ipv6-in-ipv4 tunnels, this is no longer true.
1231 ut[i].family = family;
1233 switch (ut[i].family) {
1236 #if IS_ENABLED(CONFIG_IPV6)
1248 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1250 struct nlattr *rt = attrs[XFRMA_TMPL];
1255 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1256 int nr = nla_len(rt) / sizeof(*utmpl);
1259 err = validate_tmpl(nr, utmpl, pol->family);
1263 copy_templates(pol, utmpl, nr);
1268 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1270 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1271 struct xfrm_userpolicy_type *upt;
1272 u8 type = XFRM_POLICY_TYPE_MAIN;
1280 err = verify_policy_type(type);
1288 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1290 xp->priority = p->priority;
1291 xp->index = p->index;
1292 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1293 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1294 xp->action = p->action;
1295 xp->flags = p->flags;
1296 xp->family = p->sel.family;
1297 /* XXX xp->share = p->share; */
1300 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1302 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1303 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1304 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1305 p->priority = xp->priority;
1306 p->index = xp->index;
1307 p->sel.family = xp->family;
1309 p->action = xp->action;
1310 p->flags = xp->flags;
1311 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1314 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1316 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1324 copy_from_user_policy(xp, p);
1326 err = copy_from_user_policy_type(&xp->type, attrs);
1330 if (!(err = copy_from_user_tmpl(xp, attrs)))
1331 err = copy_from_user_sec_ctx(xp, attrs);
1335 xfrm_mark_get(attrs, &xp->mark);
1341 xfrm_policy_destroy(xp);
1345 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1346 struct nlattr **attrs)
1348 struct net *net = sock_net(skb->sk);
1349 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1350 struct xfrm_policy *xp;
1354 uid_t loginuid = audit_get_loginuid(current);
1355 u32 sessionid = audit_get_sessionid(current);
1358 err = verify_newpolicy_info(p);
1361 err = verify_sec_ctx_len(attrs);
1365 xp = xfrm_policy_construct(net, p, attrs, &err);
1369 /* shouldn't excl be based on nlh flags??
1370 * Aha! this is anti-netlink really i.e more pfkey derived
1371 * in netlink excl is a flag and you wouldnt need
1372 * a type XFRM_MSG_UPDPOLICY - JHS */
1373 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1374 err = xfrm_policy_insert(p->dir, xp, excl);
1375 security_task_getsecid(current, &sid);
1376 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1379 security_xfrm_policy_free(xp->security);
1384 c.event = nlh->nlmsg_type;
1385 c.seq = nlh->nlmsg_seq;
1386 c.pid = nlh->nlmsg_pid;
1387 km_policy_notify(xp, p->dir, &c);
1394 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1396 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1399 if (xp->xfrm_nr == 0)
1402 for (i = 0; i < xp->xfrm_nr; i++) {
1403 struct xfrm_user_tmpl *up = &vec[i];
1404 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1406 memcpy(&up->id, &kp->id, sizeof(up->id));
1407 up->family = kp->encap_family;
1408 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1409 up->reqid = kp->reqid;
1410 up->mode = kp->mode;
1411 up->share = kp->share;
1412 up->optional = kp->optional;
1413 up->aalgos = kp->aalgos;
1414 up->ealgos = kp->ealgos;
1415 up->calgos = kp->calgos;
1418 return nla_put(skb, XFRMA_TMPL,
1419 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1422 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1425 return copy_sec_ctx(x->security, skb);
1430 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1433 return copy_sec_ctx(xp->security, skb);
1437 static inline size_t userpolicy_type_attrsize(void)
1439 #ifdef CONFIG_XFRM_SUB_POLICY
1440 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1446 #ifdef CONFIG_XFRM_SUB_POLICY
1447 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1449 struct xfrm_userpolicy_type upt = {
1453 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1457 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1463 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1465 struct xfrm_dump_info *sp = ptr;
1466 struct xfrm_userpolicy_info *p;
1467 struct sk_buff *in_skb = sp->in_skb;
1468 struct sk_buff *skb = sp->out_skb;
1469 struct nlmsghdr *nlh;
1471 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1472 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1476 p = nlmsg_data(nlh);
1477 copy_to_user_policy(xp, p, dir);
1478 if (copy_to_user_tmpl(xp, skb) < 0)
1480 if (copy_to_user_sec_ctx(xp, skb))
1482 if (copy_to_user_policy_type(xp->type, skb) < 0)
1484 if (xfrm_mark_put(skb, &xp->mark))
1485 goto nla_put_failure;
1487 nlmsg_end(skb, nlh);
1492 nlmsg_cancel(skb, nlh);
1496 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1498 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1500 xfrm_policy_walk_done(walk);
1504 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1506 struct net *net = sock_net(skb->sk);
1507 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1508 struct xfrm_dump_info info;
1510 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1511 sizeof(cb->args) - sizeof(cb->args[0]));
1513 info.in_skb = cb->skb;
1515 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1516 info.nlmsg_flags = NLM_F_MULTI;
1520 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1523 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1528 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1529 struct xfrm_policy *xp,
1532 struct xfrm_dump_info info;
1533 struct sk_buff *skb;
1536 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1538 return ERR_PTR(-ENOMEM);
1540 info.in_skb = in_skb;
1542 info.nlmsg_seq = seq;
1543 info.nlmsg_flags = 0;
1545 err = dump_one_policy(xp, dir, 0, &info);
1548 return ERR_PTR(err);
1554 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1555 struct nlattr **attrs)
1557 struct net *net = sock_net(skb->sk);
1558 struct xfrm_policy *xp;
1559 struct xfrm_userpolicy_id *p;
1560 u8 type = XFRM_POLICY_TYPE_MAIN;
1565 u32 mark = xfrm_mark_get(attrs, &m);
1567 p = nlmsg_data(nlh);
1568 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1570 err = copy_from_user_policy_type(&type, attrs);
1574 err = verify_policy_dir(p->dir);
1579 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1581 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1582 struct xfrm_sec_ctx *ctx;
1584 err = verify_sec_ctx_len(attrs);
1590 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1592 err = security_xfrm_policy_alloc(&ctx, uctx);
1596 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1598 security_xfrm_policy_free(ctx);
1604 struct sk_buff *resp_skb;
1606 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1607 if (IS_ERR(resp_skb)) {
1608 err = PTR_ERR(resp_skb);
1610 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1611 NETLINK_CB(skb).pid);
1614 uid_t loginuid = audit_get_loginuid(current);
1615 u32 sessionid = audit_get_sessionid(current);
1618 security_task_getsecid(current, &sid);
1619 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1625 c.data.byid = p->index;
1626 c.event = nlh->nlmsg_type;
1627 c.seq = nlh->nlmsg_seq;
1628 c.pid = nlh->nlmsg_pid;
1629 km_policy_notify(xp, p->dir, &c);
1637 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1638 struct nlattr **attrs)
1640 struct net *net = sock_net(skb->sk);
1642 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1643 struct xfrm_audit audit_info;
1646 audit_info.loginuid = audit_get_loginuid(current);
1647 audit_info.sessionid = audit_get_sessionid(current);
1648 security_task_getsecid(current, &audit_info.secid);
1649 err = xfrm_state_flush(net, p->proto, &audit_info);
1651 if (err == -ESRCH) /* empty table */
1655 c.data.proto = p->proto;
1656 c.event = nlh->nlmsg_type;
1657 c.seq = nlh->nlmsg_seq;
1658 c.pid = nlh->nlmsg_pid;
1660 km_state_notify(NULL, &c);
1665 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1667 size_t replay_size = x->replay_esn ?
1668 xfrm_replay_state_esn_len(x->replay_esn) :
1669 sizeof(struct xfrm_replay_state);
1671 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1672 + nla_total_size(replay_size)
1673 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1674 + nla_total_size(sizeof(struct xfrm_mark))
1675 + nla_total_size(4) /* XFRM_AE_RTHR */
1676 + nla_total_size(4); /* XFRM_AE_ETHR */
1679 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1681 struct xfrm_aevent_id *id;
1682 struct nlmsghdr *nlh;
1684 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1688 id = nlmsg_data(nlh);
1689 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1690 id->sa_id.spi = x->id.spi;
1691 id->sa_id.family = x->props.family;
1692 id->sa_id.proto = x->id.proto;
1693 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1694 id->reqid = x->props.reqid;
1695 id->flags = c->data.aevent;
1698 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
1699 xfrm_replay_state_esn_len(x->replay_esn),
1702 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1704 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1706 if (id->flags & XFRM_AE_RTHR)
1707 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1709 if (id->flags & XFRM_AE_ETHR)
1710 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1711 x->replay_maxage * 10 / HZ);
1713 if (xfrm_mark_put(skb, &x->mark))
1714 goto nla_put_failure;
1716 return nlmsg_end(skb, nlh);
1719 nlmsg_cancel(skb, nlh);
1723 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1724 struct nlattr **attrs)
1726 struct net *net = sock_net(skb->sk);
1727 struct xfrm_state *x;
1728 struct sk_buff *r_skb;
1733 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1734 struct xfrm_usersa_id *id = &p->sa_id;
1736 mark = xfrm_mark_get(attrs, &m);
1738 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1742 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1743 if (r_skb == NULL) {
1749 * XXX: is this lock really needed - none of the other
1750 * gets lock (the concern is things getting updated
1751 * while we are still reading) - jhs
1753 spin_lock_bh(&x->lock);
1754 c.data.aevent = p->flags;
1755 c.seq = nlh->nlmsg_seq;
1756 c.pid = nlh->nlmsg_pid;
1758 if (build_aevent(r_skb, x, &c) < 0)
1760 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1761 spin_unlock_bh(&x->lock);
1766 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1767 struct nlattr **attrs)
1769 struct net *net = sock_net(skb->sk);
1770 struct xfrm_state *x;
1775 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1776 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1777 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1778 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1780 if (!lt && !rp && !re)
1783 /* pedantic mode - thou shalt sayeth replaceth */
1784 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1787 mark = xfrm_mark_get(attrs, &m);
1789 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1793 if (x->km.state != XFRM_STATE_VALID)
1796 err = xfrm_replay_verify_len(x->replay_esn, rp);
1800 spin_lock_bh(&x->lock);
1801 xfrm_update_ae_params(x, attrs);
1802 spin_unlock_bh(&x->lock);
1804 c.event = nlh->nlmsg_type;
1805 c.seq = nlh->nlmsg_seq;
1806 c.pid = nlh->nlmsg_pid;
1807 c.data.aevent = XFRM_AE_CU;
1808 km_state_notify(x, &c);
1815 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1816 struct nlattr **attrs)
1818 struct net *net = sock_net(skb->sk);
1820 u8 type = XFRM_POLICY_TYPE_MAIN;
1822 struct xfrm_audit audit_info;
1824 err = copy_from_user_policy_type(&type, attrs);
1828 audit_info.loginuid = audit_get_loginuid(current);
1829 audit_info.sessionid = audit_get_sessionid(current);
1830 security_task_getsecid(current, &audit_info.secid);
1831 err = xfrm_policy_flush(net, type, &audit_info);
1833 if (err == -ESRCH) /* empty table */
1839 c.event = nlh->nlmsg_type;
1840 c.seq = nlh->nlmsg_seq;
1841 c.pid = nlh->nlmsg_pid;
1843 km_policy_notify(NULL, 0, &c);
1847 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1848 struct nlattr **attrs)
1850 struct net *net = sock_net(skb->sk);
1851 struct xfrm_policy *xp;
1852 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1853 struct xfrm_userpolicy_info *p = &up->pol;
1854 u8 type = XFRM_POLICY_TYPE_MAIN;
1857 u32 mark = xfrm_mark_get(attrs, &m);
1859 err = copy_from_user_policy_type(&type, attrs);
1863 err = verify_policy_dir(p->dir);
1868 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1870 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1871 struct xfrm_sec_ctx *ctx;
1873 err = verify_sec_ctx_len(attrs);
1879 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1881 err = security_xfrm_policy_alloc(&ctx, uctx);
1885 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1886 &p->sel, ctx, 0, &err);
1887 security_xfrm_policy_free(ctx);
1892 if (unlikely(xp->walk.dead))
1897 uid_t loginuid = audit_get_loginuid(current);
1898 u32 sessionid = audit_get_sessionid(current);
1901 security_task_getsecid(current, &sid);
1902 xfrm_policy_delete(xp, p->dir);
1903 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1906 // reset the timers here?
1907 WARN(1, "Dont know what to do with soft policy expire\n");
1909 km_policy_expired(xp, p->dir, up->hard, current->pid);
1916 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1917 struct nlattr **attrs)
1919 struct net *net = sock_net(skb->sk);
1920 struct xfrm_state *x;
1922 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1923 struct xfrm_usersa_info *p = &ue->state;
1925 u32 mark = xfrm_mark_get(attrs, &m);
1927 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1933 spin_lock_bh(&x->lock);
1935 if (x->km.state != XFRM_STATE_VALID)
1937 km_state_expired(x, ue->hard, current->pid);
1940 uid_t loginuid = audit_get_loginuid(current);
1941 u32 sessionid = audit_get_sessionid(current);
1944 security_task_getsecid(current, &sid);
1945 __xfrm_state_delete(x);
1946 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1950 spin_unlock_bh(&x->lock);
1955 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1956 struct nlattr **attrs)
1958 struct net *net = sock_net(skb->sk);
1959 struct xfrm_policy *xp;
1960 struct xfrm_user_tmpl *ut;
1962 struct nlattr *rt = attrs[XFRMA_TMPL];
1963 struct xfrm_mark mark;
1965 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1966 struct xfrm_state *x = xfrm_state_alloc(net);
1972 xfrm_mark_get(attrs, &mark);
1974 err = verify_newpolicy_info(&ua->policy);
1979 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
1983 memcpy(&x->id, &ua->id, sizeof(ua->id));
1984 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1985 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1986 xp->mark.m = x->mark.m = mark.m;
1987 xp->mark.v = x->mark.v = mark.v;
1989 /* extract the templates and for each call km_key */
1990 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1991 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1992 memcpy(&x->id, &t->id, sizeof(x->id));
1993 x->props.mode = t->mode;
1994 x->props.reqid = t->reqid;
1995 x->props.family = ut->family;
1996 t->aalgos = ua->aalgos;
1997 t->ealgos = ua->ealgos;
1998 t->calgos = ua->calgos;
1999 err = km_query(x, t, xp);
2009 WARN(1, "BAD policy passed\n");
2016 #ifdef CONFIG_XFRM_MIGRATE
2017 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2018 struct xfrm_kmaddress *k,
2019 struct nlattr **attrs, int *num)
2021 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2022 struct xfrm_user_migrate *um;
2026 struct xfrm_user_kmaddress *uk;
2028 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2029 memcpy(&k->local, &uk->local, sizeof(k->local));
2030 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2031 k->family = uk->family;
2032 k->reserved = uk->reserved;
2036 num_migrate = nla_len(rt) / sizeof(*um);
2038 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2041 for (i = 0; i < num_migrate; i++, um++, ma++) {
2042 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2043 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2044 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2045 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2047 ma->proto = um->proto;
2048 ma->mode = um->mode;
2049 ma->reqid = um->reqid;
2051 ma->old_family = um->old_family;
2052 ma->new_family = um->new_family;
2059 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2060 struct nlattr **attrs)
2062 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2063 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2064 struct xfrm_kmaddress km, *kmp;
2069 if (attrs[XFRMA_MIGRATE] == NULL)
2072 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2074 err = copy_from_user_policy_type(&type, attrs);
2078 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2085 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
2090 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2091 struct nlattr **attrs)
2093 return -ENOPROTOOPT;
2097 #ifdef CONFIG_XFRM_MIGRATE
2098 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2100 struct xfrm_user_migrate um;
2102 memset(&um, 0, sizeof(um));
2103 um.proto = m->proto;
2105 um.reqid = m->reqid;
2106 um.old_family = m->old_family;
2107 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2108 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2109 um.new_family = m->new_family;
2110 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2111 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2113 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2116 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2118 struct xfrm_user_kmaddress uk;
2120 memset(&uk, 0, sizeof(uk));
2121 uk.family = k->family;
2122 uk.reserved = k->reserved;
2123 memcpy(&uk.local, &k->local, sizeof(uk.local));
2124 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2126 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2129 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2131 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2132 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2133 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2134 + userpolicy_type_attrsize();
2137 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2138 int num_migrate, const struct xfrm_kmaddress *k,
2139 const struct xfrm_selector *sel, u8 dir, u8 type)
2141 const struct xfrm_migrate *mp;
2142 struct xfrm_userpolicy_id *pol_id;
2143 struct nlmsghdr *nlh;
2146 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2150 pol_id = nlmsg_data(nlh);
2151 /* copy data from selector, dir, and type to the pol_id */
2152 memset(pol_id, 0, sizeof(*pol_id));
2153 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2156 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2159 if (copy_to_user_policy_type(type, skb) < 0)
2162 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2163 if (copy_to_user_migrate(mp, skb) < 0)
2167 return nlmsg_end(skb, nlh);
2169 nlmsg_cancel(skb, nlh);
2173 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2174 const struct xfrm_migrate *m, int num_migrate,
2175 const struct xfrm_kmaddress *k)
2177 struct net *net = &init_net;
2178 struct sk_buff *skb;
2180 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2185 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2188 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2191 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2192 const struct xfrm_migrate *m, int num_migrate,
2193 const struct xfrm_kmaddress *k)
2195 return -ENOPROTOOPT;
2199 #define XMSGSIZE(type) sizeof(struct type)
2201 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2202 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2203 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2204 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2205 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2206 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2207 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2208 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2209 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2210 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2211 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2212 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2213 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2214 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2215 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2216 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2217 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2218 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2219 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2220 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2221 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2226 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2227 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2228 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2229 [XFRMA_LASTUSED] = { .type = NLA_U64},
2230 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2231 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2232 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2233 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2234 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2235 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2236 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2237 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2238 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2239 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2240 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2241 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2242 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2243 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2244 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2245 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2246 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2247 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2248 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2249 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2252 static struct xfrm_link {
2253 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2254 int (*dump)(struct sk_buff *, struct netlink_callback *);
2255 int (*done)(struct netlink_callback *);
2256 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2257 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2258 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2259 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2260 .dump = xfrm_dump_sa,
2261 .done = xfrm_dump_sa_done },
2262 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2263 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2264 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2265 .dump = xfrm_dump_policy,
2266 .done = xfrm_dump_policy_done },
2267 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2268 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2269 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2270 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2271 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2272 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2273 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2274 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2275 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2276 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2277 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2278 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2279 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2282 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2284 struct net *net = sock_net(skb->sk);
2285 struct nlattr *attrs[XFRMA_MAX+1];
2286 struct xfrm_link *link;
2289 type = nlh->nlmsg_type;
2290 if (type > XFRM_MSG_MAX)
2293 type -= XFRM_MSG_BASE;
2294 link = &xfrm_dispatch[type];
2296 /* All operations require privileges, even GET */
2297 if (!capable(CAP_NET_ADMIN))
2300 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2301 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2302 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2303 if (link->dump == NULL)
2307 struct netlink_dump_control c = {
2311 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2315 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2320 if (link->doit == NULL)
2323 return link->doit(skb, nlh, attrs);
2326 static void xfrm_netlink_rcv(struct sk_buff *skb)
2328 mutex_lock(&xfrm_cfg_mutex);
2329 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2330 mutex_unlock(&xfrm_cfg_mutex);
2333 static inline size_t xfrm_expire_msgsize(void)
2335 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2336 + nla_total_size(sizeof(struct xfrm_mark));
2339 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2341 struct xfrm_user_expire *ue;
2342 struct nlmsghdr *nlh;
2344 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2348 ue = nlmsg_data(nlh);
2349 copy_to_user_state(x, &ue->state);
2350 ue->hard = (c->data.hard != 0) ? 1 : 0;
2352 if (xfrm_mark_put(skb, &x->mark))
2353 goto nla_put_failure;
2355 return nlmsg_end(skb, nlh);
2361 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2363 struct net *net = xs_net(x);
2364 struct sk_buff *skb;
2366 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2370 if (build_expire(skb, x, c) < 0) {
2375 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2378 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2380 struct net *net = xs_net(x);
2381 struct sk_buff *skb;
2383 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2387 if (build_aevent(skb, x, c) < 0)
2390 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2393 static int xfrm_notify_sa_flush(const struct km_event *c)
2395 struct net *net = c->net;
2396 struct xfrm_usersa_flush *p;
2397 struct nlmsghdr *nlh;
2398 struct sk_buff *skb;
2399 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2401 skb = nlmsg_new(len, GFP_ATOMIC);
2405 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2411 p = nlmsg_data(nlh);
2412 p->proto = c->data.proto;
2414 nlmsg_end(skb, nlh);
2416 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2419 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2423 l += nla_total_size(aead_len(x->aead));
2425 l += nla_total_size(sizeof(struct xfrm_algo) +
2426 (x->aalg->alg_key_len + 7) / 8);
2427 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2430 l += nla_total_size(xfrm_alg_len(x->ealg));
2432 l += nla_total_size(sizeof(*x->calg));
2434 l += nla_total_size(sizeof(*x->encap));
2436 l += nla_total_size(sizeof(x->tfcpad));
2438 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2440 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2441 x->security->ctx_len);
2443 l += nla_total_size(sizeof(*x->coaddr));
2445 /* Must count x->lastused as it may become non-zero behind our back. */
2446 l += nla_total_size(sizeof(u64));
2451 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2453 struct net *net = xs_net(x);
2454 struct xfrm_usersa_info *p;
2455 struct xfrm_usersa_id *id;
2456 struct nlmsghdr *nlh;
2457 struct sk_buff *skb;
2458 int len = xfrm_sa_len(x);
2461 headlen = sizeof(*p);
2462 if (c->event == XFRM_MSG_DELSA) {
2463 len += nla_total_size(headlen);
2464 headlen = sizeof(*id);
2465 len += nla_total_size(sizeof(struct xfrm_mark));
2467 len += NLMSG_ALIGN(headlen);
2469 skb = nlmsg_new(len, GFP_ATOMIC);
2473 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2475 goto nla_put_failure;
2477 p = nlmsg_data(nlh);
2478 if (c->event == XFRM_MSG_DELSA) {
2479 struct nlattr *attr;
2481 id = nlmsg_data(nlh);
2482 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2483 id->spi = x->id.spi;
2484 id->family = x->props.family;
2485 id->proto = x->id.proto;
2487 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2489 goto nla_put_failure;
2494 if (copy_to_user_state_extra(x, p, skb))
2495 goto nla_put_failure;
2497 nlmsg_end(skb, nlh);
2499 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2502 /* Somebody screwed up with xfrm_sa_len! */
2508 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2512 case XFRM_MSG_EXPIRE:
2513 return xfrm_exp_state_notify(x, c);
2514 case XFRM_MSG_NEWAE:
2515 return xfrm_aevent_state_notify(x, c);
2516 case XFRM_MSG_DELSA:
2517 case XFRM_MSG_UPDSA:
2518 case XFRM_MSG_NEWSA:
2519 return xfrm_notify_sa(x, c);
2520 case XFRM_MSG_FLUSHSA:
2521 return xfrm_notify_sa_flush(c);
2523 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2532 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2533 struct xfrm_policy *xp)
2535 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2536 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2537 + nla_total_size(sizeof(struct xfrm_mark))
2538 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2539 + userpolicy_type_attrsize();
2542 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2543 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2546 struct xfrm_user_acquire *ua;
2547 struct nlmsghdr *nlh;
2548 __u32 seq = xfrm_get_acqseq();
2550 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2554 ua = nlmsg_data(nlh);
2555 memcpy(&ua->id, &x->id, sizeof(ua->id));
2556 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2557 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2558 copy_to_user_policy(xp, &ua->policy, dir);
2559 ua->aalgos = xt->aalgos;
2560 ua->ealgos = xt->ealgos;
2561 ua->calgos = xt->calgos;
2562 ua->seq = x->km.seq = seq;
2564 if (copy_to_user_tmpl(xp, skb) < 0)
2566 if (copy_to_user_state_sec_ctx(x, skb))
2568 if (copy_to_user_policy_type(xp->type, skb) < 0)
2570 if (xfrm_mark_put(skb, &xp->mark))
2571 goto nla_put_failure;
2573 return nlmsg_end(skb, nlh);
2577 nlmsg_cancel(skb, nlh);
2581 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2582 struct xfrm_policy *xp, int dir)
2584 struct net *net = xs_net(x);
2585 struct sk_buff *skb;
2587 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2591 if (build_acquire(skb, x, xt, xp, dir) < 0)
2594 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2597 /* User gives us xfrm_user_policy_info followed by an array of 0
2598 * or more templates.
2600 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2601 u8 *data, int len, int *dir)
2603 struct net *net = sock_net(sk);
2604 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2605 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2606 struct xfrm_policy *xp;
2609 switch (sk->sk_family) {
2611 if (opt != IP_XFRM_POLICY) {
2616 #if IS_ENABLED(CONFIG_IPV6)
2618 if (opt != IPV6_XFRM_POLICY) {
2631 if (len < sizeof(*p) ||
2632 verify_newpolicy_info(p))
2635 nr = ((len - sizeof(*p)) / sizeof(*ut));
2636 if (validate_tmpl(nr, ut, p->sel.family))
2639 if (p->dir > XFRM_POLICY_OUT)
2642 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2648 copy_from_user_policy(xp, p);
2649 xp->type = XFRM_POLICY_TYPE_MAIN;
2650 copy_templates(xp, ut, nr);
2657 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2659 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2660 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2661 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2662 + nla_total_size(sizeof(struct xfrm_mark))
2663 + userpolicy_type_attrsize();
2666 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2667 int dir, const struct km_event *c)
2669 struct xfrm_user_polexpire *upe;
2670 struct nlmsghdr *nlh;
2671 int hard = c->data.hard;
2673 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2677 upe = nlmsg_data(nlh);
2678 copy_to_user_policy(xp, &upe->pol, dir);
2679 if (copy_to_user_tmpl(xp, skb) < 0)
2681 if (copy_to_user_sec_ctx(xp, skb))
2683 if (copy_to_user_policy_type(xp->type, skb) < 0)
2685 if (xfrm_mark_put(skb, &xp->mark))
2686 goto nla_put_failure;
2689 return nlmsg_end(skb, nlh);
2693 nlmsg_cancel(skb, nlh);
2697 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2699 struct net *net = xp_net(xp);
2700 struct sk_buff *skb;
2702 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2706 if (build_polexpire(skb, xp, dir, c) < 0)
2709 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2712 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2714 struct net *net = xp_net(xp);
2715 struct xfrm_userpolicy_info *p;
2716 struct xfrm_userpolicy_id *id;
2717 struct nlmsghdr *nlh;
2718 struct sk_buff *skb;
2719 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2722 headlen = sizeof(*p);
2723 if (c->event == XFRM_MSG_DELPOLICY) {
2724 len += nla_total_size(headlen);
2725 headlen = sizeof(*id);
2727 len += userpolicy_type_attrsize();
2728 len += nla_total_size(sizeof(struct xfrm_mark));
2729 len += NLMSG_ALIGN(headlen);
2731 skb = nlmsg_new(len, GFP_ATOMIC);
2735 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2739 p = nlmsg_data(nlh);
2740 if (c->event == XFRM_MSG_DELPOLICY) {
2741 struct nlattr *attr;
2743 id = nlmsg_data(nlh);
2744 memset(id, 0, sizeof(*id));
2747 id->index = xp->index;
2749 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2751 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2758 copy_to_user_policy(xp, p, dir);
2759 if (copy_to_user_tmpl(xp, skb) < 0)
2761 if (copy_to_user_policy_type(xp->type, skb) < 0)
2764 if (xfrm_mark_put(skb, &xp->mark))
2765 goto nla_put_failure;
2767 nlmsg_end(skb, nlh);
2769 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2777 static int xfrm_notify_policy_flush(const struct km_event *c)
2779 struct net *net = c->net;
2780 struct nlmsghdr *nlh;
2781 struct sk_buff *skb;
2783 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2787 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2790 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2793 nlmsg_end(skb, nlh);
2795 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2802 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2806 case XFRM_MSG_NEWPOLICY:
2807 case XFRM_MSG_UPDPOLICY:
2808 case XFRM_MSG_DELPOLICY:
2809 return xfrm_notify_policy(xp, dir, c);
2810 case XFRM_MSG_FLUSHPOLICY:
2811 return xfrm_notify_policy_flush(c);
2812 case XFRM_MSG_POLEXPIRE:
2813 return xfrm_exp_policy_notify(xp, dir, c);
2815 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2823 static inline size_t xfrm_report_msgsize(void)
2825 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2828 static int build_report(struct sk_buff *skb, u8 proto,
2829 struct xfrm_selector *sel, xfrm_address_t *addr)
2831 struct xfrm_user_report *ur;
2832 struct nlmsghdr *nlh;
2834 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2838 ur = nlmsg_data(nlh);
2840 memcpy(&ur->sel, sel, sizeof(ur->sel));
2843 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2845 return nlmsg_end(skb, nlh);
2848 nlmsg_cancel(skb, nlh);
2852 static int xfrm_send_report(struct net *net, u8 proto,
2853 struct xfrm_selector *sel, xfrm_address_t *addr)
2855 struct sk_buff *skb;
2857 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2861 if (build_report(skb, proto, sel, addr) < 0)
2864 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2867 static inline size_t xfrm_mapping_msgsize(void)
2869 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2872 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2873 xfrm_address_t *new_saddr, __be16 new_sport)
2875 struct xfrm_user_mapping *um;
2876 struct nlmsghdr *nlh;
2878 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2882 um = nlmsg_data(nlh);
2884 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2885 um->id.spi = x->id.spi;
2886 um->id.family = x->props.family;
2887 um->id.proto = x->id.proto;
2888 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2889 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2890 um->new_sport = new_sport;
2891 um->old_sport = x->encap->encap_sport;
2892 um->reqid = x->props.reqid;
2894 return nlmsg_end(skb, nlh);
2897 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2900 struct net *net = xs_net(x);
2901 struct sk_buff *skb;
2903 if (x->id.proto != IPPROTO_ESP)
2909 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2913 if (build_mapping(skb, x, ipaddr, sport) < 0)
2916 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2919 static struct xfrm_mgr netlink_mgr = {
2921 .notify = xfrm_send_state_notify,
2922 .acquire = xfrm_send_acquire,
2923 .compile_policy = xfrm_compile_policy,
2924 .notify_policy = xfrm_send_policy_notify,
2925 .report = xfrm_send_report,
2926 .migrate = xfrm_send_migrate,
2927 .new_mapping = xfrm_send_mapping,
2930 static int __net_init xfrm_user_net_init(struct net *net)
2934 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
2935 xfrm_netlink_rcv, NULL, THIS_MODULE);
2938 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2939 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2943 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
2946 list_for_each_entry(net, net_exit_list, exit_list)
2947 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
2949 list_for_each_entry(net, net_exit_list, exit_list)
2950 netlink_kernel_release(net->xfrm.nlsk_stash);
2953 static struct pernet_operations xfrm_user_net_ops = {
2954 .init = xfrm_user_net_init,
2955 .exit_batch = xfrm_user_net_exit,
2958 static int __init xfrm_user_init(void)
2962 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2964 rv = register_pernet_subsys(&xfrm_user_net_ops);
2967 rv = xfrm_register_km(&netlink_mgr);
2969 unregister_pernet_subsys(&xfrm_user_net_ops);
2973 static void __exit xfrm_user_exit(void)
2975 xfrm_unregister_km(&netlink_mgr);
2976 unregister_pernet_subsys(&xfrm_user_net_ops);
2979 module_init(xfrm_user_init);
2980 module_exit(xfrm_user_exit);
2981 MODULE_LICENSE("GPL");
2982 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);