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,
759 copy_to_user_state(x, p);
762 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
767 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
772 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
777 ret = copy_to_user_auth(x->aalg, skb);
779 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
780 xfrm_alg_auth_len(x->aalg), x->aalg);
785 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
790 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
795 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
800 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
804 ret = xfrm_mark_put(skb, &x->mark);
808 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
809 xfrm_replay_state_esn_len(x->replay_esn),
815 ret = copy_sec_ctx(x->security, skb);
820 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
822 struct xfrm_dump_info *sp = ptr;
823 struct sk_buff *in_skb = sp->in_skb;
824 struct sk_buff *skb = sp->out_skb;
825 struct xfrm_usersa_info *p;
826 struct nlmsghdr *nlh;
829 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
830 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
836 err = copy_to_user_state_extra(x, p, skb);
838 nlmsg_cancel(skb, nlh);
845 static int xfrm_dump_sa_done(struct netlink_callback *cb)
847 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
848 xfrm_state_walk_done(walk);
852 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
854 struct net *net = sock_net(skb->sk);
855 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
856 struct xfrm_dump_info info;
858 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
859 sizeof(cb->args) - sizeof(cb->args[0]));
861 info.in_skb = cb->skb;
863 info.nlmsg_seq = cb->nlh->nlmsg_seq;
864 info.nlmsg_flags = NLM_F_MULTI;
868 xfrm_state_walk_init(walk, 0);
871 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
876 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
877 struct xfrm_state *x, u32 seq)
879 struct xfrm_dump_info info;
883 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
885 return ERR_PTR(-ENOMEM);
887 info.in_skb = in_skb;
889 info.nlmsg_seq = seq;
890 info.nlmsg_flags = 0;
892 err = dump_one_state(x, 0, &info);
901 static inline size_t xfrm_spdinfo_msgsize(void)
903 return NLMSG_ALIGN(4)
904 + nla_total_size(sizeof(struct xfrmu_spdinfo))
905 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
908 static int build_spdinfo(struct sk_buff *skb, struct net *net,
909 u32 pid, u32 seq, u32 flags)
911 struct xfrmk_spdinfo si;
912 struct xfrmu_spdinfo spc;
913 struct xfrmu_spdhinfo sph;
914 struct nlmsghdr *nlh;
918 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
919 if (nlh == NULL) /* shouldn't really happen ... */
924 xfrm_spd_getinfo(net, &si);
925 spc.incnt = si.incnt;
926 spc.outcnt = si.outcnt;
927 spc.fwdcnt = si.fwdcnt;
928 spc.inscnt = si.inscnt;
929 spc.outscnt = si.outscnt;
930 spc.fwdscnt = si.fwdscnt;
931 sph.spdhcnt = si.spdhcnt;
932 sph.spdhmcnt = si.spdhmcnt;
934 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
936 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
938 nlmsg_cancel(skb, nlh);
942 return nlmsg_end(skb, nlh);
945 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
946 struct nlattr **attrs)
948 struct net *net = sock_net(skb->sk);
949 struct sk_buff *r_skb;
950 u32 *flags = nlmsg_data(nlh);
951 u32 spid = NETLINK_CB(skb).pid;
952 u32 seq = nlh->nlmsg_seq;
954 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
958 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
961 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
964 static inline size_t xfrm_sadinfo_msgsize(void)
966 return NLMSG_ALIGN(4)
967 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
968 + nla_total_size(4); /* XFRMA_SAD_CNT */
971 static int build_sadinfo(struct sk_buff *skb, struct net *net,
972 u32 pid, u32 seq, u32 flags)
974 struct xfrmk_sadinfo si;
975 struct xfrmu_sadhinfo sh;
976 struct nlmsghdr *nlh;
980 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
981 if (nlh == NULL) /* shouldn't really happen ... */
986 xfrm_sad_getinfo(net, &si);
988 sh.sadhmcnt = si.sadhmcnt;
989 sh.sadhcnt = si.sadhcnt;
991 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
993 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
995 nlmsg_cancel(skb, nlh);
999 return nlmsg_end(skb, nlh);
1002 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1003 struct nlattr **attrs)
1005 struct net *net = sock_net(skb->sk);
1006 struct sk_buff *r_skb;
1007 u32 *flags = nlmsg_data(nlh);
1008 u32 spid = NETLINK_CB(skb).pid;
1009 u32 seq = nlh->nlmsg_seq;
1011 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1015 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
1018 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
1021 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1022 struct nlattr **attrs)
1024 struct net *net = sock_net(skb->sk);
1025 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1026 struct xfrm_state *x;
1027 struct sk_buff *resp_skb;
1030 x = xfrm_user_state_lookup(net, p, attrs, &err);
1034 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1035 if (IS_ERR(resp_skb)) {
1036 err = PTR_ERR(resp_skb);
1038 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1045 static int verify_userspi_info(struct xfrm_userspi_info *p)
1047 switch (p->info.id.proto) {
1053 /* IPCOMP spi is 16-bits. */
1054 if (p->max >= 0x10000)
1062 if (p->min > p->max)
1068 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1069 struct nlattr **attrs)
1071 struct net *net = sock_net(skb->sk);
1072 struct xfrm_state *x;
1073 struct xfrm_userspi_info *p;
1074 struct sk_buff *resp_skb;
1075 xfrm_address_t *daddr;
1081 p = nlmsg_data(nlh);
1082 err = verify_userspi_info(p);
1086 family = p->info.family;
1087 daddr = &p->info.id.daddr;
1091 mark = xfrm_mark_get(attrs, &m);
1093 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1094 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1101 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1102 p->info.id.proto, daddr,
1109 err = xfrm_alloc_spi(x, p->min, p->max);
1113 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1114 if (IS_ERR(resp_skb)) {
1115 err = PTR_ERR(resp_skb);
1119 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1127 static int verify_policy_dir(u8 dir)
1130 case XFRM_POLICY_IN:
1131 case XFRM_POLICY_OUT:
1132 case XFRM_POLICY_FWD:
1142 static int verify_policy_type(u8 type)
1145 case XFRM_POLICY_TYPE_MAIN:
1146 #ifdef CONFIG_XFRM_SUB_POLICY
1147 case XFRM_POLICY_TYPE_SUB:
1158 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1161 case XFRM_SHARE_ANY:
1162 case XFRM_SHARE_SESSION:
1163 case XFRM_SHARE_USER:
1164 case XFRM_SHARE_UNIQUE:
1171 switch (p->action) {
1172 case XFRM_POLICY_ALLOW:
1173 case XFRM_POLICY_BLOCK:
1180 switch (p->sel.family) {
1185 #if IS_ENABLED(CONFIG_IPV6)
1188 return -EAFNOSUPPORT;
1195 return verify_policy_dir(p->dir);
1198 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1200 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1201 struct xfrm_user_sec_ctx *uctx;
1206 uctx = nla_data(rt);
1207 return security_xfrm_policy_alloc(&pol->security, uctx);
1210 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1216 for (i = 0; i < nr; i++, ut++) {
1217 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1219 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1220 memcpy(&t->saddr, &ut->saddr,
1221 sizeof(xfrm_address_t));
1222 t->reqid = ut->reqid;
1224 t->share = ut->share;
1225 t->optional = ut->optional;
1226 t->aalgos = ut->aalgos;
1227 t->ealgos = ut->ealgos;
1228 t->calgos = ut->calgos;
1229 /* If all masks are ~0, then we allow all algorithms. */
1230 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1231 t->encap_family = ut->family;
1235 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1239 if (nr > XFRM_MAX_DEPTH)
1242 for (i = 0; i < nr; i++) {
1243 /* We never validated the ut->family value, so many
1244 * applications simply leave it at zero. The check was
1245 * never made and ut->family was ignored because all
1246 * templates could be assumed to have the same family as
1247 * the policy itself. Now that we will have ipv4-in-ipv6
1248 * and ipv6-in-ipv4 tunnels, this is no longer true.
1251 ut[i].family = family;
1253 switch (ut[i].family) {
1256 #if IS_ENABLED(CONFIG_IPV6)
1268 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1270 struct nlattr *rt = attrs[XFRMA_TMPL];
1275 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1276 int nr = nla_len(rt) / sizeof(*utmpl);
1279 err = validate_tmpl(nr, utmpl, pol->family);
1283 copy_templates(pol, utmpl, nr);
1288 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1290 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1291 struct xfrm_userpolicy_type *upt;
1292 u8 type = XFRM_POLICY_TYPE_MAIN;
1300 err = verify_policy_type(type);
1308 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1310 xp->priority = p->priority;
1311 xp->index = p->index;
1312 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1313 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1314 xp->action = p->action;
1315 xp->flags = p->flags;
1316 xp->family = p->sel.family;
1317 /* XXX xp->share = p->share; */
1320 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1322 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1323 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1324 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1325 p->priority = xp->priority;
1326 p->index = xp->index;
1327 p->sel.family = xp->family;
1329 p->action = xp->action;
1330 p->flags = xp->flags;
1331 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1334 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1336 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1344 copy_from_user_policy(xp, p);
1346 err = copy_from_user_policy_type(&xp->type, attrs);
1350 if (!(err = copy_from_user_tmpl(xp, attrs)))
1351 err = copy_from_user_sec_ctx(xp, attrs);
1355 xfrm_mark_get(attrs, &xp->mark);
1361 xfrm_policy_destroy(xp);
1365 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1366 struct nlattr **attrs)
1368 struct net *net = sock_net(skb->sk);
1369 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1370 struct xfrm_policy *xp;
1374 uid_t loginuid = audit_get_loginuid(current);
1375 u32 sessionid = audit_get_sessionid(current);
1378 err = verify_newpolicy_info(p);
1381 err = verify_sec_ctx_len(attrs);
1385 xp = xfrm_policy_construct(net, p, attrs, &err);
1389 /* shouldn't excl be based on nlh flags??
1390 * Aha! this is anti-netlink really i.e more pfkey derived
1391 * in netlink excl is a flag and you wouldnt need
1392 * a type XFRM_MSG_UPDPOLICY - JHS */
1393 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1394 err = xfrm_policy_insert(p->dir, xp, excl);
1395 security_task_getsecid(current, &sid);
1396 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1399 security_xfrm_policy_free(xp->security);
1404 c.event = nlh->nlmsg_type;
1405 c.seq = nlh->nlmsg_seq;
1406 c.pid = nlh->nlmsg_pid;
1407 km_policy_notify(xp, p->dir, &c);
1414 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1416 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1419 if (xp->xfrm_nr == 0)
1422 for (i = 0; i < xp->xfrm_nr; i++) {
1423 struct xfrm_user_tmpl *up = &vec[i];
1424 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1426 memcpy(&up->id, &kp->id, sizeof(up->id));
1427 up->family = kp->encap_family;
1428 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1429 up->reqid = kp->reqid;
1430 up->mode = kp->mode;
1431 up->share = kp->share;
1432 up->optional = kp->optional;
1433 up->aalgos = kp->aalgos;
1434 up->ealgos = kp->ealgos;
1435 up->calgos = kp->calgos;
1438 return nla_put(skb, XFRMA_TMPL,
1439 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1442 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1445 return copy_sec_ctx(x->security, skb);
1450 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1453 return copy_sec_ctx(xp->security, skb);
1456 static inline size_t userpolicy_type_attrsize(void)
1458 #ifdef CONFIG_XFRM_SUB_POLICY
1459 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1465 #ifdef CONFIG_XFRM_SUB_POLICY
1466 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1468 struct xfrm_userpolicy_type upt = {
1472 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1476 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1482 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1484 struct xfrm_dump_info *sp = ptr;
1485 struct xfrm_userpolicy_info *p;
1486 struct sk_buff *in_skb = sp->in_skb;
1487 struct sk_buff *skb = sp->out_skb;
1488 struct nlmsghdr *nlh;
1491 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1492 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1496 p = nlmsg_data(nlh);
1497 copy_to_user_policy(xp, p, dir);
1498 err = copy_to_user_tmpl(xp, skb);
1500 err = copy_to_user_sec_ctx(xp, skb);
1502 err = copy_to_user_policy_type(xp->type, skb);
1504 err = xfrm_mark_put(skb, &xp->mark);
1506 nlmsg_cancel(skb, nlh);
1509 nlmsg_end(skb, nlh);
1513 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1515 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1517 xfrm_policy_walk_done(walk);
1521 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1523 struct net *net = sock_net(skb->sk);
1524 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1525 struct xfrm_dump_info info;
1527 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1528 sizeof(cb->args) - sizeof(cb->args[0]));
1530 info.in_skb = cb->skb;
1532 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1533 info.nlmsg_flags = NLM_F_MULTI;
1537 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1540 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1545 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1546 struct xfrm_policy *xp,
1549 struct xfrm_dump_info info;
1550 struct sk_buff *skb;
1552 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1554 return ERR_PTR(-ENOMEM);
1556 info.in_skb = in_skb;
1558 info.nlmsg_seq = seq;
1559 info.nlmsg_flags = 0;
1561 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1569 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1570 struct nlattr **attrs)
1572 struct net *net = sock_net(skb->sk);
1573 struct xfrm_policy *xp;
1574 struct xfrm_userpolicy_id *p;
1575 u8 type = XFRM_POLICY_TYPE_MAIN;
1580 u32 mark = xfrm_mark_get(attrs, &m);
1582 p = nlmsg_data(nlh);
1583 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1585 err = copy_from_user_policy_type(&type, attrs);
1589 err = verify_policy_dir(p->dir);
1594 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1596 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1597 struct xfrm_sec_ctx *ctx;
1599 err = verify_sec_ctx_len(attrs);
1605 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1607 err = security_xfrm_policy_alloc(&ctx, uctx);
1611 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1613 security_xfrm_policy_free(ctx);
1619 struct sk_buff *resp_skb;
1621 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1622 if (IS_ERR(resp_skb)) {
1623 err = PTR_ERR(resp_skb);
1625 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1626 NETLINK_CB(skb).pid);
1629 uid_t loginuid = audit_get_loginuid(current);
1630 u32 sessionid = audit_get_sessionid(current);
1633 security_task_getsecid(current, &sid);
1634 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1640 c.data.byid = p->index;
1641 c.event = nlh->nlmsg_type;
1642 c.seq = nlh->nlmsg_seq;
1643 c.pid = nlh->nlmsg_pid;
1644 km_policy_notify(xp, p->dir, &c);
1652 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1653 struct nlattr **attrs)
1655 struct net *net = sock_net(skb->sk);
1657 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1658 struct xfrm_audit audit_info;
1661 audit_info.loginuid = audit_get_loginuid(current);
1662 audit_info.sessionid = audit_get_sessionid(current);
1663 security_task_getsecid(current, &audit_info.secid);
1664 err = xfrm_state_flush(net, p->proto, &audit_info);
1666 if (err == -ESRCH) /* empty table */
1670 c.data.proto = p->proto;
1671 c.event = nlh->nlmsg_type;
1672 c.seq = nlh->nlmsg_seq;
1673 c.pid = nlh->nlmsg_pid;
1675 km_state_notify(NULL, &c);
1680 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1682 size_t replay_size = x->replay_esn ?
1683 xfrm_replay_state_esn_len(x->replay_esn) :
1684 sizeof(struct xfrm_replay_state);
1686 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1687 + nla_total_size(replay_size)
1688 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1689 + nla_total_size(sizeof(struct xfrm_mark))
1690 + nla_total_size(4) /* XFRM_AE_RTHR */
1691 + nla_total_size(4); /* XFRM_AE_ETHR */
1694 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1696 struct xfrm_aevent_id *id;
1697 struct nlmsghdr *nlh;
1700 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1704 id = nlmsg_data(nlh);
1705 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1706 id->sa_id.spi = x->id.spi;
1707 id->sa_id.family = x->props.family;
1708 id->sa_id.proto = x->id.proto;
1709 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1710 id->reqid = x->props.reqid;
1711 id->flags = c->data.aevent;
1713 if (x->replay_esn) {
1714 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1715 xfrm_replay_state_esn_len(x->replay_esn),
1718 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1723 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1727 if (id->flags & XFRM_AE_RTHR) {
1728 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1732 if (id->flags & XFRM_AE_ETHR) {
1733 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1734 x->replay_maxage * 10 / HZ);
1738 err = xfrm_mark_put(skb, &x->mark);
1742 return nlmsg_end(skb, nlh);
1745 nlmsg_cancel(skb, nlh);
1749 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1750 struct nlattr **attrs)
1752 struct net *net = sock_net(skb->sk);
1753 struct xfrm_state *x;
1754 struct sk_buff *r_skb;
1759 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1760 struct xfrm_usersa_id *id = &p->sa_id;
1762 mark = xfrm_mark_get(attrs, &m);
1764 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1768 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1769 if (r_skb == NULL) {
1775 * XXX: is this lock really needed - none of the other
1776 * gets lock (the concern is things getting updated
1777 * while we are still reading) - jhs
1779 spin_lock_bh(&x->lock);
1780 c.data.aevent = p->flags;
1781 c.seq = nlh->nlmsg_seq;
1782 c.pid = nlh->nlmsg_pid;
1784 if (build_aevent(r_skb, x, &c) < 0)
1786 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1787 spin_unlock_bh(&x->lock);
1792 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1793 struct nlattr **attrs)
1795 struct net *net = sock_net(skb->sk);
1796 struct xfrm_state *x;
1801 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1802 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1803 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1804 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1806 if (!lt && !rp && !re)
1809 /* pedantic mode - thou shalt sayeth replaceth */
1810 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1813 mark = xfrm_mark_get(attrs, &m);
1815 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1819 if (x->km.state != XFRM_STATE_VALID)
1822 err = xfrm_replay_verify_len(x->replay_esn, rp);
1826 spin_lock_bh(&x->lock);
1827 xfrm_update_ae_params(x, attrs);
1828 spin_unlock_bh(&x->lock);
1830 c.event = nlh->nlmsg_type;
1831 c.seq = nlh->nlmsg_seq;
1832 c.pid = nlh->nlmsg_pid;
1833 c.data.aevent = XFRM_AE_CU;
1834 km_state_notify(x, &c);
1841 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1842 struct nlattr **attrs)
1844 struct net *net = sock_net(skb->sk);
1846 u8 type = XFRM_POLICY_TYPE_MAIN;
1848 struct xfrm_audit audit_info;
1850 err = copy_from_user_policy_type(&type, attrs);
1854 audit_info.loginuid = audit_get_loginuid(current);
1855 audit_info.sessionid = audit_get_sessionid(current);
1856 security_task_getsecid(current, &audit_info.secid);
1857 err = xfrm_policy_flush(net, type, &audit_info);
1859 if (err == -ESRCH) /* empty table */
1865 c.event = nlh->nlmsg_type;
1866 c.seq = nlh->nlmsg_seq;
1867 c.pid = nlh->nlmsg_pid;
1869 km_policy_notify(NULL, 0, &c);
1873 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1874 struct nlattr **attrs)
1876 struct net *net = sock_net(skb->sk);
1877 struct xfrm_policy *xp;
1878 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1879 struct xfrm_userpolicy_info *p = &up->pol;
1880 u8 type = XFRM_POLICY_TYPE_MAIN;
1883 u32 mark = xfrm_mark_get(attrs, &m);
1885 err = copy_from_user_policy_type(&type, attrs);
1889 err = verify_policy_dir(p->dir);
1894 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1896 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1897 struct xfrm_sec_ctx *ctx;
1899 err = verify_sec_ctx_len(attrs);
1905 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1907 err = security_xfrm_policy_alloc(&ctx, uctx);
1911 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1912 &p->sel, ctx, 0, &err);
1913 security_xfrm_policy_free(ctx);
1918 if (unlikely(xp->walk.dead))
1923 uid_t loginuid = audit_get_loginuid(current);
1924 u32 sessionid = audit_get_sessionid(current);
1927 security_task_getsecid(current, &sid);
1928 xfrm_policy_delete(xp, p->dir);
1929 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1932 // reset the timers here?
1933 WARN(1, "Dont know what to do with soft policy expire\n");
1935 km_policy_expired(xp, p->dir, up->hard, current->pid);
1942 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1943 struct nlattr **attrs)
1945 struct net *net = sock_net(skb->sk);
1946 struct xfrm_state *x;
1948 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1949 struct xfrm_usersa_info *p = &ue->state;
1951 u32 mark = xfrm_mark_get(attrs, &m);
1953 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1959 spin_lock_bh(&x->lock);
1961 if (x->km.state != XFRM_STATE_VALID)
1963 km_state_expired(x, ue->hard, current->pid);
1966 uid_t loginuid = audit_get_loginuid(current);
1967 u32 sessionid = audit_get_sessionid(current);
1970 security_task_getsecid(current, &sid);
1971 __xfrm_state_delete(x);
1972 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1976 spin_unlock_bh(&x->lock);
1981 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1982 struct nlattr **attrs)
1984 struct net *net = sock_net(skb->sk);
1985 struct xfrm_policy *xp;
1986 struct xfrm_user_tmpl *ut;
1988 struct nlattr *rt = attrs[XFRMA_TMPL];
1989 struct xfrm_mark mark;
1991 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1992 struct xfrm_state *x = xfrm_state_alloc(net);
1998 xfrm_mark_get(attrs, &mark);
2000 err = verify_newpolicy_info(&ua->policy);
2005 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2009 memcpy(&x->id, &ua->id, sizeof(ua->id));
2010 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2011 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2012 xp->mark.m = x->mark.m = mark.m;
2013 xp->mark.v = x->mark.v = mark.v;
2015 /* extract the templates and for each call km_key */
2016 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2017 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2018 memcpy(&x->id, &t->id, sizeof(x->id));
2019 x->props.mode = t->mode;
2020 x->props.reqid = t->reqid;
2021 x->props.family = ut->family;
2022 t->aalgos = ua->aalgos;
2023 t->ealgos = ua->ealgos;
2024 t->calgos = ua->calgos;
2025 err = km_query(x, t, xp);
2035 WARN(1, "BAD policy passed\n");
2042 #ifdef CONFIG_XFRM_MIGRATE
2043 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2044 struct xfrm_kmaddress *k,
2045 struct nlattr **attrs, int *num)
2047 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2048 struct xfrm_user_migrate *um;
2052 struct xfrm_user_kmaddress *uk;
2054 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2055 memcpy(&k->local, &uk->local, sizeof(k->local));
2056 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2057 k->family = uk->family;
2058 k->reserved = uk->reserved;
2062 num_migrate = nla_len(rt) / sizeof(*um);
2064 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2067 for (i = 0; i < num_migrate; i++, um++, ma++) {
2068 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2069 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2070 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2071 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2073 ma->proto = um->proto;
2074 ma->mode = um->mode;
2075 ma->reqid = um->reqid;
2077 ma->old_family = um->old_family;
2078 ma->new_family = um->new_family;
2085 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2086 struct nlattr **attrs)
2088 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2089 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2090 struct xfrm_kmaddress km, *kmp;
2095 if (attrs[XFRMA_MIGRATE] == NULL)
2098 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2100 err = copy_from_user_policy_type(&type, attrs);
2104 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2111 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
2116 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2117 struct nlattr **attrs)
2119 return -ENOPROTOOPT;
2123 #ifdef CONFIG_XFRM_MIGRATE
2124 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2126 struct xfrm_user_migrate um;
2128 memset(&um, 0, sizeof(um));
2129 um.proto = m->proto;
2131 um.reqid = m->reqid;
2132 um.old_family = m->old_family;
2133 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2134 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2135 um.new_family = m->new_family;
2136 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2137 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2139 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2142 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2144 struct xfrm_user_kmaddress uk;
2146 memset(&uk, 0, sizeof(uk));
2147 uk.family = k->family;
2148 uk.reserved = k->reserved;
2149 memcpy(&uk.local, &k->local, sizeof(uk.local));
2150 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2152 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2155 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2157 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2158 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2159 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2160 + userpolicy_type_attrsize();
2163 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2164 int num_migrate, const struct xfrm_kmaddress *k,
2165 const struct xfrm_selector *sel, u8 dir, u8 type)
2167 const struct xfrm_migrate *mp;
2168 struct xfrm_userpolicy_id *pol_id;
2169 struct nlmsghdr *nlh;
2172 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2176 pol_id = nlmsg_data(nlh);
2177 /* copy data from selector, dir, and type to the pol_id */
2178 memset(pol_id, 0, sizeof(*pol_id));
2179 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2183 err = copy_to_user_kmaddress(k, skb);
2187 err = copy_to_user_policy_type(type, skb);
2190 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2191 err = copy_to_user_migrate(mp, skb);
2196 return nlmsg_end(skb, nlh);
2199 nlmsg_cancel(skb, nlh);
2203 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2204 const struct xfrm_migrate *m, int num_migrate,
2205 const struct xfrm_kmaddress *k)
2207 struct net *net = &init_net;
2208 struct sk_buff *skb;
2210 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2215 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2218 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2221 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2222 const struct xfrm_migrate *m, int num_migrate,
2223 const struct xfrm_kmaddress *k)
2225 return -ENOPROTOOPT;
2229 #define XMSGSIZE(type) sizeof(struct type)
2231 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2232 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2233 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2234 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2235 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2236 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2237 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2238 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2239 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2240 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2241 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2242 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2243 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2244 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2245 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2246 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2247 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2248 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2249 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2250 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2251 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2256 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2257 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2258 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2259 [XFRMA_LASTUSED] = { .type = NLA_U64},
2260 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2261 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2262 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2263 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2264 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2265 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2266 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2267 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2268 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2269 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2270 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2271 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2272 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2273 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2274 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2275 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2276 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2277 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2278 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2279 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2282 static struct xfrm_link {
2283 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2284 int (*dump)(struct sk_buff *, struct netlink_callback *);
2285 int (*done)(struct netlink_callback *);
2286 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2287 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2288 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2289 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2290 .dump = xfrm_dump_sa,
2291 .done = xfrm_dump_sa_done },
2292 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2293 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2294 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2295 .dump = xfrm_dump_policy,
2296 .done = xfrm_dump_policy_done },
2297 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2298 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2299 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2300 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2301 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2302 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2303 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2304 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2305 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2306 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2307 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2308 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2309 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2312 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2314 struct net *net = sock_net(skb->sk);
2315 struct nlattr *attrs[XFRMA_MAX+1];
2316 struct xfrm_link *link;
2319 type = nlh->nlmsg_type;
2320 if (type > XFRM_MSG_MAX)
2323 type -= XFRM_MSG_BASE;
2324 link = &xfrm_dispatch[type];
2326 /* All operations require privileges, even GET */
2327 if (!capable(CAP_NET_ADMIN))
2330 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2331 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2332 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2333 if (link->dump == NULL)
2337 struct netlink_dump_control c = {
2341 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2345 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2350 if (link->doit == NULL)
2353 return link->doit(skb, nlh, attrs);
2356 static void xfrm_netlink_rcv(struct sk_buff *skb)
2358 mutex_lock(&xfrm_cfg_mutex);
2359 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2360 mutex_unlock(&xfrm_cfg_mutex);
2363 static inline size_t xfrm_expire_msgsize(void)
2365 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2366 + nla_total_size(sizeof(struct xfrm_mark));
2369 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2371 struct xfrm_user_expire *ue;
2372 struct nlmsghdr *nlh;
2375 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2379 ue = nlmsg_data(nlh);
2380 copy_to_user_state(x, &ue->state);
2381 ue->hard = (c->data.hard != 0) ? 1 : 0;
2383 err = xfrm_mark_put(skb, &x->mark);
2387 return nlmsg_end(skb, nlh);
2390 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2392 struct net *net = xs_net(x);
2393 struct sk_buff *skb;
2395 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2399 if (build_expire(skb, x, c) < 0) {
2404 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2407 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2409 struct net *net = xs_net(x);
2410 struct sk_buff *skb;
2412 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2416 if (build_aevent(skb, x, c) < 0)
2419 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2422 static int xfrm_notify_sa_flush(const struct km_event *c)
2424 struct net *net = c->net;
2425 struct xfrm_usersa_flush *p;
2426 struct nlmsghdr *nlh;
2427 struct sk_buff *skb;
2428 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2430 skb = nlmsg_new(len, GFP_ATOMIC);
2434 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2440 p = nlmsg_data(nlh);
2441 p->proto = c->data.proto;
2443 nlmsg_end(skb, nlh);
2445 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2448 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2452 l += nla_total_size(aead_len(x->aead));
2454 l += nla_total_size(sizeof(struct xfrm_algo) +
2455 (x->aalg->alg_key_len + 7) / 8);
2456 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2459 l += nla_total_size(xfrm_alg_len(x->ealg));
2461 l += nla_total_size(sizeof(*x->calg));
2463 l += nla_total_size(sizeof(*x->encap));
2465 l += nla_total_size(sizeof(x->tfcpad));
2467 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2469 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2470 x->security->ctx_len);
2472 l += nla_total_size(sizeof(*x->coaddr));
2474 /* Must count x->lastused as it may become non-zero behind our back. */
2475 l += nla_total_size(sizeof(u64));
2480 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2482 struct net *net = xs_net(x);
2483 struct xfrm_usersa_info *p;
2484 struct xfrm_usersa_id *id;
2485 struct nlmsghdr *nlh;
2486 struct sk_buff *skb;
2487 int len = xfrm_sa_len(x);
2490 headlen = sizeof(*p);
2491 if (c->event == XFRM_MSG_DELSA) {
2492 len += nla_total_size(headlen);
2493 headlen = sizeof(*id);
2494 len += nla_total_size(sizeof(struct xfrm_mark));
2496 len += NLMSG_ALIGN(headlen);
2498 skb = nlmsg_new(len, GFP_ATOMIC);
2502 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2507 p = nlmsg_data(nlh);
2508 if (c->event == XFRM_MSG_DELSA) {
2509 struct nlattr *attr;
2511 id = nlmsg_data(nlh);
2512 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2513 id->spi = x->id.spi;
2514 id->family = x->props.family;
2515 id->proto = x->id.proto;
2517 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2524 err = copy_to_user_state_extra(x, p, skb);
2528 nlmsg_end(skb, nlh);
2530 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2537 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2541 case XFRM_MSG_EXPIRE:
2542 return xfrm_exp_state_notify(x, c);
2543 case XFRM_MSG_NEWAE:
2544 return xfrm_aevent_state_notify(x, c);
2545 case XFRM_MSG_DELSA:
2546 case XFRM_MSG_UPDSA:
2547 case XFRM_MSG_NEWSA:
2548 return xfrm_notify_sa(x, c);
2549 case XFRM_MSG_FLUSHSA:
2550 return xfrm_notify_sa_flush(c);
2552 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2561 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2562 struct xfrm_policy *xp)
2564 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2565 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2566 + nla_total_size(sizeof(struct xfrm_mark))
2567 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2568 + userpolicy_type_attrsize();
2571 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2572 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2575 __u32 seq = xfrm_get_acqseq();
2576 struct xfrm_user_acquire *ua;
2577 struct nlmsghdr *nlh;
2580 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2584 ua = nlmsg_data(nlh);
2585 memcpy(&ua->id, &x->id, sizeof(ua->id));
2586 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2587 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2588 copy_to_user_policy(xp, &ua->policy, dir);
2589 ua->aalgos = xt->aalgos;
2590 ua->ealgos = xt->ealgos;
2591 ua->calgos = xt->calgos;
2592 ua->seq = x->km.seq = seq;
2594 err = copy_to_user_tmpl(xp, skb);
2596 err = copy_to_user_state_sec_ctx(x, skb);
2598 err = copy_to_user_policy_type(xp->type, skb);
2600 err = xfrm_mark_put(skb, &xp->mark);
2602 nlmsg_cancel(skb, nlh);
2606 return nlmsg_end(skb, nlh);
2609 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2610 struct xfrm_policy *xp, int dir)
2612 struct net *net = xs_net(x);
2613 struct sk_buff *skb;
2615 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2619 if (build_acquire(skb, x, xt, xp, dir) < 0)
2622 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2625 /* User gives us xfrm_user_policy_info followed by an array of 0
2626 * or more templates.
2628 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2629 u8 *data, int len, int *dir)
2631 struct net *net = sock_net(sk);
2632 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2633 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2634 struct xfrm_policy *xp;
2637 switch (sk->sk_family) {
2639 if (opt != IP_XFRM_POLICY) {
2644 #if IS_ENABLED(CONFIG_IPV6)
2646 if (opt != IPV6_XFRM_POLICY) {
2659 if (len < sizeof(*p) ||
2660 verify_newpolicy_info(p))
2663 nr = ((len - sizeof(*p)) / sizeof(*ut));
2664 if (validate_tmpl(nr, ut, p->sel.family))
2667 if (p->dir > XFRM_POLICY_OUT)
2670 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2676 copy_from_user_policy(xp, p);
2677 xp->type = XFRM_POLICY_TYPE_MAIN;
2678 copy_templates(xp, ut, nr);
2685 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2687 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2688 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2689 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2690 + nla_total_size(sizeof(struct xfrm_mark))
2691 + userpolicy_type_attrsize();
2694 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2695 int dir, const struct km_event *c)
2697 struct xfrm_user_polexpire *upe;
2698 int hard = c->data.hard;
2699 struct nlmsghdr *nlh;
2702 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2706 upe = nlmsg_data(nlh);
2707 copy_to_user_policy(xp, &upe->pol, dir);
2708 err = copy_to_user_tmpl(xp, skb);
2710 err = copy_to_user_sec_ctx(xp, skb);
2712 err = copy_to_user_policy_type(xp->type, skb);
2714 err = xfrm_mark_put(skb, &xp->mark);
2716 nlmsg_cancel(skb, nlh);
2721 return nlmsg_end(skb, nlh);
2724 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2726 struct net *net = xp_net(xp);
2727 struct sk_buff *skb;
2729 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2733 if (build_polexpire(skb, xp, dir, c) < 0)
2736 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2739 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2741 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2742 struct net *net = xp_net(xp);
2743 struct xfrm_userpolicy_info *p;
2744 struct xfrm_userpolicy_id *id;
2745 struct nlmsghdr *nlh;
2746 struct sk_buff *skb;
2749 headlen = sizeof(*p);
2750 if (c->event == XFRM_MSG_DELPOLICY) {
2751 len += nla_total_size(headlen);
2752 headlen = sizeof(*id);
2754 len += userpolicy_type_attrsize();
2755 len += nla_total_size(sizeof(struct xfrm_mark));
2756 len += NLMSG_ALIGN(headlen);
2758 skb = nlmsg_new(len, GFP_ATOMIC);
2762 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2767 p = nlmsg_data(nlh);
2768 if (c->event == XFRM_MSG_DELPOLICY) {
2769 struct nlattr *attr;
2771 id = nlmsg_data(nlh);
2772 memset(id, 0, sizeof(*id));
2775 id->index = xp->index;
2777 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2779 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2787 copy_to_user_policy(xp, p, dir);
2788 err = copy_to_user_tmpl(xp, skb);
2790 err = copy_to_user_policy_type(xp->type, skb);
2792 err = xfrm_mark_put(skb, &xp->mark);
2796 nlmsg_end(skb, nlh);
2798 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2805 static int xfrm_notify_policy_flush(const struct km_event *c)
2807 struct net *net = c->net;
2808 struct nlmsghdr *nlh;
2809 struct sk_buff *skb;
2812 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2816 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2820 err = copy_to_user_policy_type(c->data.type, skb);
2824 nlmsg_end(skb, nlh);
2826 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2833 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2837 case XFRM_MSG_NEWPOLICY:
2838 case XFRM_MSG_UPDPOLICY:
2839 case XFRM_MSG_DELPOLICY:
2840 return xfrm_notify_policy(xp, dir, c);
2841 case XFRM_MSG_FLUSHPOLICY:
2842 return xfrm_notify_policy_flush(c);
2843 case XFRM_MSG_POLEXPIRE:
2844 return xfrm_exp_policy_notify(xp, dir, c);
2846 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2854 static inline size_t xfrm_report_msgsize(void)
2856 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2859 static int build_report(struct sk_buff *skb, u8 proto,
2860 struct xfrm_selector *sel, xfrm_address_t *addr)
2862 struct xfrm_user_report *ur;
2863 struct nlmsghdr *nlh;
2865 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2869 ur = nlmsg_data(nlh);
2871 memcpy(&ur->sel, sel, sizeof(ur->sel));
2874 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2876 nlmsg_cancel(skb, nlh);
2880 return nlmsg_end(skb, nlh);
2883 static int xfrm_send_report(struct net *net, u8 proto,
2884 struct xfrm_selector *sel, xfrm_address_t *addr)
2886 struct sk_buff *skb;
2888 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2892 if (build_report(skb, proto, sel, addr) < 0)
2895 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2898 static inline size_t xfrm_mapping_msgsize(void)
2900 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2903 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2904 xfrm_address_t *new_saddr, __be16 new_sport)
2906 struct xfrm_user_mapping *um;
2907 struct nlmsghdr *nlh;
2909 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2913 um = nlmsg_data(nlh);
2915 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2916 um->id.spi = x->id.spi;
2917 um->id.family = x->props.family;
2918 um->id.proto = x->id.proto;
2919 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2920 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2921 um->new_sport = new_sport;
2922 um->old_sport = x->encap->encap_sport;
2923 um->reqid = x->props.reqid;
2925 return nlmsg_end(skb, nlh);
2928 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2931 struct net *net = xs_net(x);
2932 struct sk_buff *skb;
2934 if (x->id.proto != IPPROTO_ESP)
2940 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2944 if (build_mapping(skb, x, ipaddr, sport) < 0)
2947 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2950 static struct xfrm_mgr netlink_mgr = {
2952 .notify = xfrm_send_state_notify,
2953 .acquire = xfrm_send_acquire,
2954 .compile_policy = xfrm_compile_policy,
2955 .notify_policy = xfrm_send_policy_notify,
2956 .report = xfrm_send_report,
2957 .migrate = xfrm_send_migrate,
2958 .new_mapping = xfrm_send_mapping,
2961 static int __net_init xfrm_user_net_init(struct net *net)
2964 struct netlink_kernel_cfg cfg = {
2965 .groups = XFRMNLGRP_MAX,
2966 .input = xfrm_netlink_rcv,
2969 nlsk = netlink_kernel_create(net, NETLINK_XFRM, THIS_MODULE, &cfg);
2972 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2973 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2977 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
2980 list_for_each_entry(net, net_exit_list, exit_list)
2981 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
2983 list_for_each_entry(net, net_exit_list, exit_list)
2984 netlink_kernel_release(net->xfrm.nlsk_stash);
2987 static struct pernet_operations xfrm_user_net_ops = {
2988 .init = xfrm_user_net_init,
2989 .exit_batch = xfrm_user_net_exit,
2992 static int __init xfrm_user_init(void)
2996 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2998 rv = register_pernet_subsys(&xfrm_user_net_ops);
3001 rv = xfrm_register_km(&netlink_mgr);
3003 unregister_pernet_subsys(&xfrm_user_net_ops);
3007 static void __exit xfrm_user_exit(void)
3009 xfrm_unregister_km(&netlink_mgr);
3010 unregister_pernet_subsys(&xfrm_user_net_ops);
3013 module_init(xfrm_user_init);
3014 module_exit(xfrm_user_exit);
3015 MODULE_LICENSE("GPL");
3016 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);