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,
448 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
449 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
450 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
451 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
452 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
455 struct xfrm_replay_state_esn *replay_esn;
456 replay_esn = nla_data(re);
457 memcpy(x->replay_esn, replay_esn,
458 xfrm_replay_state_esn_len(replay_esn));
459 memcpy(x->preplay_esn, replay_esn,
460 xfrm_replay_state_esn_len(replay_esn));
464 struct xfrm_replay_state *replay;
465 replay = nla_data(rp);
466 memcpy(&x->replay, replay, sizeof(*replay));
467 memcpy(&x->preplay, replay, sizeof(*replay));
471 struct xfrm_lifetime_cur *ltime;
472 ltime = nla_data(lt);
473 x->curlft.bytes = ltime->bytes;
474 x->curlft.packets = ltime->packets;
475 x->curlft.add_time = ltime->add_time;
476 x->curlft.use_time = ltime->use_time;
480 x->replay_maxage = nla_get_u32(et);
483 x->replay_maxdiff = nla_get_u32(rt);
486 static struct xfrm_state *xfrm_state_construct(struct net *net,
487 struct xfrm_usersa_info *p,
488 struct nlattr **attrs,
491 struct xfrm_state *x = xfrm_state_alloc(net);
497 copy_from_user_state(x, p);
499 if ((err = attach_aead(&x->aead, &x->props.ealgo,
500 attrs[XFRMA_ALG_AEAD])))
502 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
503 attrs[XFRMA_ALG_AUTH_TRUNC])))
505 if (!x->props.aalgo) {
506 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
507 attrs[XFRMA_ALG_AUTH])))
510 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
511 xfrm_ealg_get_byname,
512 attrs[XFRMA_ALG_CRYPT])))
514 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
515 xfrm_calg_get_byname,
516 attrs[XFRMA_ALG_COMP])))
519 if (attrs[XFRMA_ENCAP]) {
520 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
521 sizeof(*x->encap), GFP_KERNEL);
522 if (x->encap == NULL)
526 if (attrs[XFRMA_TFCPAD])
527 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
529 if (attrs[XFRMA_COADDR]) {
530 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
531 sizeof(*x->coaddr), GFP_KERNEL);
532 if (x->coaddr == NULL)
536 xfrm_mark_get(attrs, &x->mark);
538 err = __xfrm_init_state(x, false);
542 if (attrs[XFRMA_SEC_CTX] &&
543 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
546 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
547 attrs[XFRMA_REPLAY_ESN_VAL])))
551 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
552 /* sysctl_xfrm_aevent_etime is in 100ms units */
553 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
555 if ((err = xfrm_init_replay(x)))
558 /* override default values from above */
559 xfrm_update_ae_params(x, attrs, 0);
564 x->km.state = XFRM_STATE_DEAD;
571 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
572 struct nlattr **attrs)
574 struct net *net = sock_net(skb->sk);
575 struct xfrm_usersa_info *p = nlmsg_data(nlh);
576 struct xfrm_state *x;
579 uid_t loginuid = audit_get_loginuid(current);
580 u32 sessionid = audit_get_sessionid(current);
583 err = verify_newsa_info(p, attrs);
587 x = xfrm_state_construct(net, p, attrs, &err);
592 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
593 err = xfrm_state_add(x);
595 err = xfrm_state_update(x);
597 security_task_getsecid(current, &sid);
598 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
601 x->km.state = XFRM_STATE_DEAD;
606 c.seq = nlh->nlmsg_seq;
607 c.pid = nlh->nlmsg_pid;
608 c.event = nlh->nlmsg_type;
610 km_state_notify(x, &c);
616 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
617 struct xfrm_usersa_id *p,
618 struct nlattr **attrs,
621 struct xfrm_state *x = NULL;
624 u32 mark = xfrm_mark_get(attrs, &m);
626 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
628 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
630 xfrm_address_t *saddr = NULL;
632 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
639 x = xfrm_state_lookup_byaddr(net, mark,
641 p->proto, p->family);
650 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
651 struct nlattr **attrs)
653 struct net *net = sock_net(skb->sk);
654 struct xfrm_state *x;
657 struct xfrm_usersa_id *p = nlmsg_data(nlh);
658 uid_t loginuid = audit_get_loginuid(current);
659 u32 sessionid = audit_get_sessionid(current);
662 x = xfrm_user_state_lookup(net, p, attrs, &err);
666 if ((err = security_xfrm_state_delete(x)) != 0)
669 if (xfrm_state_kern(x)) {
674 err = xfrm_state_delete(x);
679 c.seq = nlh->nlmsg_seq;
680 c.pid = nlh->nlmsg_pid;
681 c.event = nlh->nlmsg_type;
682 km_state_notify(x, &c);
685 security_task_getsecid(current, &sid);
686 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
691 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
693 memset(p, 0, sizeof(*p));
694 memcpy(&p->id, &x->id, sizeof(p->id));
695 memcpy(&p->sel, &x->sel, sizeof(p->sel));
696 memcpy(&p->lft, &x->lft, sizeof(p->lft));
697 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
698 memcpy(&p->stats, &x->stats, sizeof(p->stats));
699 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
700 p->mode = x->props.mode;
701 p->replay_window = x->props.replay_window;
702 p->reqid = x->props.reqid;
703 p->family = x->props.family;
704 p->flags = x->props.flags;
708 struct xfrm_dump_info {
709 struct sk_buff *in_skb;
710 struct sk_buff *out_skb;
715 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
717 struct xfrm_user_sec_ctx *uctx;
719 int ctx_size = sizeof(*uctx) + s->ctx_len;
721 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
725 uctx = nla_data(attr);
726 uctx->exttype = XFRMA_SEC_CTX;
727 uctx->len = ctx_size;
728 uctx->ctx_doi = s->ctx_doi;
729 uctx->ctx_alg = s->ctx_alg;
730 uctx->ctx_len = s->ctx_len;
731 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
736 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
738 struct xfrm_algo *algo;
741 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
742 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
746 algo = nla_data(nla);
747 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
748 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
749 algo->alg_key_len = auth->alg_key_len;
754 /* Don't change this without updating xfrm_sa_len! */
755 static int copy_to_user_state_extra(struct xfrm_state *x,
756 struct xfrm_usersa_info *p,
759 copy_to_user_state(x, p);
762 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
765 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
768 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
770 if (copy_to_user_auth(x->aalg, skb))
771 goto nla_put_failure;
773 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
774 xfrm_alg_auth_len(x->aalg), x->aalg);
777 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
779 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
782 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
785 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
787 if (xfrm_mark_put(skb, &x->mark))
788 goto nla_put_failure;
791 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
792 xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
794 if (x->security && copy_sec_ctx(x->security, skb) < 0)
795 goto nla_put_failure;
803 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
805 struct xfrm_dump_info *sp = ptr;
806 struct sk_buff *in_skb = sp->in_skb;
807 struct sk_buff *skb = sp->out_skb;
808 struct xfrm_usersa_info *p;
809 struct nlmsghdr *nlh;
812 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
813 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
819 err = copy_to_user_state_extra(x, p, skb);
821 goto nla_put_failure;
827 nlmsg_cancel(skb, nlh);
831 static int xfrm_dump_sa_done(struct netlink_callback *cb)
833 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
834 xfrm_state_walk_done(walk);
838 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
840 struct net *net = sock_net(skb->sk);
841 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
842 struct xfrm_dump_info info;
844 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
845 sizeof(cb->args) - sizeof(cb->args[0]));
847 info.in_skb = cb->skb;
849 info.nlmsg_seq = cb->nlh->nlmsg_seq;
850 info.nlmsg_flags = NLM_F_MULTI;
854 xfrm_state_walk_init(walk, 0);
857 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
862 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
863 struct xfrm_state *x, u32 seq)
865 struct xfrm_dump_info info;
869 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
871 return ERR_PTR(-ENOMEM);
873 info.in_skb = in_skb;
875 info.nlmsg_seq = seq;
876 info.nlmsg_flags = 0;
878 err = dump_one_state(x, 0, &info);
887 static inline size_t xfrm_spdinfo_msgsize(void)
889 return NLMSG_ALIGN(4)
890 + nla_total_size(sizeof(struct xfrmu_spdinfo))
891 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
894 static int build_spdinfo(struct sk_buff *skb, struct net *net,
895 u32 pid, u32 seq, u32 flags)
897 struct xfrmk_spdinfo si;
898 struct xfrmu_spdinfo spc;
899 struct xfrmu_spdhinfo sph;
900 struct nlmsghdr *nlh;
903 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
904 if (nlh == NULL) /* shouldn't really happen ... */
909 xfrm_spd_getinfo(net, &si);
910 spc.incnt = si.incnt;
911 spc.outcnt = si.outcnt;
912 spc.fwdcnt = si.fwdcnt;
913 spc.inscnt = si.inscnt;
914 spc.outscnt = si.outscnt;
915 spc.fwdscnt = si.fwdscnt;
916 sph.spdhcnt = si.spdhcnt;
917 sph.spdhmcnt = si.spdhmcnt;
919 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
920 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
922 return nlmsg_end(skb, nlh);
925 nlmsg_cancel(skb, nlh);
929 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
930 struct nlattr **attrs)
932 struct net *net = sock_net(skb->sk);
933 struct sk_buff *r_skb;
934 u32 *flags = nlmsg_data(nlh);
935 u32 spid = NETLINK_CB(skb).pid;
936 u32 seq = nlh->nlmsg_seq;
938 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
942 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
945 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
948 static inline size_t xfrm_sadinfo_msgsize(void)
950 return NLMSG_ALIGN(4)
951 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
952 + nla_total_size(4); /* XFRMA_SAD_CNT */
955 static int build_sadinfo(struct sk_buff *skb, struct net *net,
956 u32 pid, u32 seq, u32 flags)
958 struct xfrmk_sadinfo si;
959 struct xfrmu_sadhinfo sh;
960 struct nlmsghdr *nlh;
963 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
964 if (nlh == NULL) /* shouldn't really happen ... */
969 xfrm_sad_getinfo(net, &si);
971 sh.sadhmcnt = si.sadhmcnt;
972 sh.sadhcnt = si.sadhcnt;
974 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
975 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
977 return nlmsg_end(skb, nlh);
980 nlmsg_cancel(skb, nlh);
984 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
985 struct nlattr **attrs)
987 struct net *net = sock_net(skb->sk);
988 struct sk_buff *r_skb;
989 u32 *flags = nlmsg_data(nlh);
990 u32 spid = NETLINK_CB(skb).pid;
991 u32 seq = nlh->nlmsg_seq;
993 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
997 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
1000 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
1003 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1004 struct nlattr **attrs)
1006 struct net *net = sock_net(skb->sk);
1007 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1008 struct xfrm_state *x;
1009 struct sk_buff *resp_skb;
1012 x = xfrm_user_state_lookup(net, p, attrs, &err);
1016 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1017 if (IS_ERR(resp_skb)) {
1018 err = PTR_ERR(resp_skb);
1020 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1027 static int verify_userspi_info(struct xfrm_userspi_info *p)
1029 switch (p->info.id.proto) {
1035 /* IPCOMP spi is 16-bits. */
1036 if (p->max >= 0x10000)
1044 if (p->min > p->max)
1050 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1051 struct nlattr **attrs)
1053 struct net *net = sock_net(skb->sk);
1054 struct xfrm_state *x;
1055 struct xfrm_userspi_info *p;
1056 struct sk_buff *resp_skb;
1057 xfrm_address_t *daddr;
1063 p = nlmsg_data(nlh);
1064 err = verify_userspi_info(p);
1068 family = p->info.family;
1069 daddr = &p->info.id.daddr;
1073 mark = xfrm_mark_get(attrs, &m);
1075 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1076 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1083 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1084 p->info.id.proto, daddr,
1091 err = xfrm_alloc_spi(x, p->min, p->max);
1095 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1096 if (IS_ERR(resp_skb)) {
1097 err = PTR_ERR(resp_skb);
1101 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1109 static int verify_policy_dir(u8 dir)
1112 case XFRM_POLICY_IN:
1113 case XFRM_POLICY_OUT:
1114 case XFRM_POLICY_FWD:
1124 static int verify_policy_type(u8 type)
1127 case XFRM_POLICY_TYPE_MAIN:
1128 #ifdef CONFIG_XFRM_SUB_POLICY
1129 case XFRM_POLICY_TYPE_SUB:
1140 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1143 case XFRM_SHARE_ANY:
1144 case XFRM_SHARE_SESSION:
1145 case XFRM_SHARE_USER:
1146 case XFRM_SHARE_UNIQUE:
1153 switch (p->action) {
1154 case XFRM_POLICY_ALLOW:
1155 case XFRM_POLICY_BLOCK:
1162 switch (p->sel.family) {
1167 #if IS_ENABLED(CONFIG_IPV6)
1170 return -EAFNOSUPPORT;
1177 return verify_policy_dir(p->dir);
1180 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1182 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1183 struct xfrm_user_sec_ctx *uctx;
1188 uctx = nla_data(rt);
1189 return security_xfrm_policy_alloc(&pol->security, uctx);
1192 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1198 for (i = 0; i < nr; i++, ut++) {
1199 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1201 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1202 memcpy(&t->saddr, &ut->saddr,
1203 sizeof(xfrm_address_t));
1204 t->reqid = ut->reqid;
1206 t->share = ut->share;
1207 t->optional = ut->optional;
1208 t->aalgos = ut->aalgos;
1209 t->ealgos = ut->ealgos;
1210 t->calgos = ut->calgos;
1211 /* If all masks are ~0, then we allow all algorithms. */
1212 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1213 t->encap_family = ut->family;
1217 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1221 if (nr > XFRM_MAX_DEPTH)
1224 for (i = 0; i < nr; i++) {
1225 /* We never validated the ut->family value, so many
1226 * applications simply leave it at zero. The check was
1227 * never made and ut->family was ignored because all
1228 * templates could be assumed to have the same family as
1229 * the policy itself. Now that we will have ipv4-in-ipv6
1230 * and ipv6-in-ipv4 tunnels, this is no longer true.
1233 ut[i].family = family;
1235 switch (ut[i].family) {
1238 #if IS_ENABLED(CONFIG_IPV6)
1250 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1252 struct nlattr *rt = attrs[XFRMA_TMPL];
1257 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1258 int nr = nla_len(rt) / sizeof(*utmpl);
1261 err = validate_tmpl(nr, utmpl, pol->family);
1265 copy_templates(pol, utmpl, nr);
1270 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1272 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1273 struct xfrm_userpolicy_type *upt;
1274 u8 type = XFRM_POLICY_TYPE_MAIN;
1282 err = verify_policy_type(type);
1290 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1292 xp->priority = p->priority;
1293 xp->index = p->index;
1294 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1295 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1296 xp->action = p->action;
1297 xp->flags = p->flags;
1298 xp->family = p->sel.family;
1299 /* XXX xp->share = p->share; */
1302 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1304 memset(p, 0, sizeof(*p));
1305 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1306 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1307 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1308 p->priority = xp->priority;
1309 p->index = xp->index;
1310 p->sel.family = xp->family;
1312 p->action = xp->action;
1313 p->flags = xp->flags;
1314 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1317 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1319 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1327 copy_from_user_policy(xp, p);
1329 err = copy_from_user_policy_type(&xp->type, attrs);
1333 if (!(err = copy_from_user_tmpl(xp, attrs)))
1334 err = copy_from_user_sec_ctx(xp, attrs);
1338 xfrm_mark_get(attrs, &xp->mark);
1344 xfrm_policy_destroy(xp);
1348 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1349 struct nlattr **attrs)
1351 struct net *net = sock_net(skb->sk);
1352 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1353 struct xfrm_policy *xp;
1357 uid_t loginuid = audit_get_loginuid(current);
1358 u32 sessionid = audit_get_sessionid(current);
1361 err = verify_newpolicy_info(p);
1364 err = verify_sec_ctx_len(attrs);
1368 xp = xfrm_policy_construct(net, p, attrs, &err);
1372 /* shouldn't excl be based on nlh flags??
1373 * Aha! this is anti-netlink really i.e more pfkey derived
1374 * in netlink excl is a flag and you wouldnt need
1375 * a type XFRM_MSG_UPDPOLICY - JHS */
1376 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1377 err = xfrm_policy_insert(p->dir, xp, excl);
1378 security_task_getsecid(current, &sid);
1379 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1382 security_xfrm_policy_free(xp->security);
1387 c.event = nlh->nlmsg_type;
1388 c.seq = nlh->nlmsg_seq;
1389 c.pid = nlh->nlmsg_pid;
1390 km_policy_notify(xp, p->dir, &c);
1397 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1399 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1402 if (xp->xfrm_nr == 0)
1405 for (i = 0; i < xp->xfrm_nr; i++) {
1406 struct xfrm_user_tmpl *up = &vec[i];
1407 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1409 memset(up, 0, sizeof(*up));
1410 memcpy(&up->id, &kp->id, sizeof(up->id));
1411 up->family = kp->encap_family;
1412 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1413 up->reqid = kp->reqid;
1414 up->mode = kp->mode;
1415 up->share = kp->share;
1416 up->optional = kp->optional;
1417 up->aalgos = kp->aalgos;
1418 up->ealgos = kp->ealgos;
1419 up->calgos = kp->calgos;
1422 return nla_put(skb, XFRMA_TMPL,
1423 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1426 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1429 return copy_sec_ctx(x->security, skb);
1434 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1437 return copy_sec_ctx(xp->security, skb);
1441 static inline size_t userpolicy_type_attrsize(void)
1443 #ifdef CONFIG_XFRM_SUB_POLICY
1444 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1450 #ifdef CONFIG_XFRM_SUB_POLICY
1451 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1453 struct xfrm_userpolicy_type upt = {
1457 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1461 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1467 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1469 struct xfrm_dump_info *sp = ptr;
1470 struct xfrm_userpolicy_info *p;
1471 struct sk_buff *in_skb = sp->in_skb;
1472 struct sk_buff *skb = sp->out_skb;
1473 struct nlmsghdr *nlh;
1475 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1476 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1480 p = nlmsg_data(nlh);
1481 copy_to_user_policy(xp, p, dir);
1482 if (copy_to_user_tmpl(xp, skb) < 0)
1484 if (copy_to_user_sec_ctx(xp, skb))
1486 if (copy_to_user_policy_type(xp->type, skb) < 0)
1488 if (xfrm_mark_put(skb, &xp->mark))
1489 goto nla_put_failure;
1491 nlmsg_end(skb, nlh);
1496 nlmsg_cancel(skb, nlh);
1500 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1502 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1504 xfrm_policy_walk_done(walk);
1508 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1510 struct net *net = sock_net(skb->sk);
1511 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1512 struct xfrm_dump_info info;
1514 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1515 sizeof(cb->args) - sizeof(cb->args[0]));
1517 info.in_skb = cb->skb;
1519 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1520 info.nlmsg_flags = NLM_F_MULTI;
1524 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1527 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1532 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1533 struct xfrm_policy *xp,
1536 struct xfrm_dump_info info;
1537 struct sk_buff *skb;
1540 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1542 return ERR_PTR(-ENOMEM);
1544 info.in_skb = in_skb;
1546 info.nlmsg_seq = seq;
1547 info.nlmsg_flags = 0;
1549 err = dump_one_policy(xp, dir, 0, &info);
1552 return ERR_PTR(err);
1558 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1559 struct nlattr **attrs)
1561 struct net *net = sock_net(skb->sk);
1562 struct xfrm_policy *xp;
1563 struct xfrm_userpolicy_id *p;
1564 u8 type = XFRM_POLICY_TYPE_MAIN;
1569 u32 mark = xfrm_mark_get(attrs, &m);
1571 p = nlmsg_data(nlh);
1572 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1574 err = copy_from_user_policy_type(&type, attrs);
1578 err = verify_policy_dir(p->dir);
1583 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1585 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1586 struct xfrm_sec_ctx *ctx;
1588 err = verify_sec_ctx_len(attrs);
1594 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1596 err = security_xfrm_policy_alloc(&ctx, uctx);
1600 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1602 security_xfrm_policy_free(ctx);
1608 struct sk_buff *resp_skb;
1610 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1611 if (IS_ERR(resp_skb)) {
1612 err = PTR_ERR(resp_skb);
1614 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1615 NETLINK_CB(skb).pid);
1618 uid_t loginuid = audit_get_loginuid(current);
1619 u32 sessionid = audit_get_sessionid(current);
1622 security_task_getsecid(current, &sid);
1623 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1629 c.data.byid = p->index;
1630 c.event = nlh->nlmsg_type;
1631 c.seq = nlh->nlmsg_seq;
1632 c.pid = nlh->nlmsg_pid;
1633 km_policy_notify(xp, p->dir, &c);
1641 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1642 struct nlattr **attrs)
1644 struct net *net = sock_net(skb->sk);
1646 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1647 struct xfrm_audit audit_info;
1650 audit_info.loginuid = audit_get_loginuid(current);
1651 audit_info.sessionid = audit_get_sessionid(current);
1652 security_task_getsecid(current, &audit_info.secid);
1653 err = xfrm_state_flush(net, p->proto, &audit_info);
1655 if (err == -ESRCH) /* empty table */
1659 c.data.proto = p->proto;
1660 c.event = nlh->nlmsg_type;
1661 c.seq = nlh->nlmsg_seq;
1662 c.pid = nlh->nlmsg_pid;
1664 km_state_notify(NULL, &c);
1669 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1671 size_t replay_size = x->replay_esn ?
1672 xfrm_replay_state_esn_len(x->replay_esn) :
1673 sizeof(struct xfrm_replay_state);
1675 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1676 + nla_total_size(replay_size)
1677 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1678 + nla_total_size(sizeof(struct xfrm_mark))
1679 + nla_total_size(4) /* XFRM_AE_RTHR */
1680 + nla_total_size(4); /* XFRM_AE_ETHR */
1683 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1685 struct xfrm_aevent_id *id;
1686 struct nlmsghdr *nlh;
1688 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1692 id = nlmsg_data(nlh);
1693 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1694 id->sa_id.spi = x->id.spi;
1695 id->sa_id.family = x->props.family;
1696 id->sa_id.proto = x->id.proto;
1697 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1698 id->reqid = x->props.reqid;
1699 id->flags = c->data.aevent;
1702 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
1703 xfrm_replay_state_esn_len(x->replay_esn),
1706 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1708 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1710 if (id->flags & XFRM_AE_RTHR)
1711 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1713 if (id->flags & XFRM_AE_ETHR)
1714 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1715 x->replay_maxage * 10 / HZ);
1717 if (xfrm_mark_put(skb, &x->mark))
1718 goto nla_put_failure;
1720 return nlmsg_end(skb, nlh);
1723 nlmsg_cancel(skb, nlh);
1727 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1728 struct nlattr **attrs)
1730 struct net *net = sock_net(skb->sk);
1731 struct xfrm_state *x;
1732 struct sk_buff *r_skb;
1737 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1738 struct xfrm_usersa_id *id = &p->sa_id;
1740 mark = xfrm_mark_get(attrs, &m);
1742 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1746 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1747 if (r_skb == NULL) {
1753 * XXX: is this lock really needed - none of the other
1754 * gets lock (the concern is things getting updated
1755 * while we are still reading) - jhs
1757 spin_lock_bh(&x->lock);
1758 c.data.aevent = p->flags;
1759 c.seq = nlh->nlmsg_seq;
1760 c.pid = nlh->nlmsg_pid;
1762 if (build_aevent(r_skb, x, &c) < 0)
1764 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1765 spin_unlock_bh(&x->lock);
1770 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1771 struct nlattr **attrs)
1773 struct net *net = sock_net(skb->sk);
1774 struct xfrm_state *x;
1779 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1780 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1781 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1782 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1784 if (!lt && !rp && !re)
1787 /* pedantic mode - thou shalt sayeth replaceth */
1788 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1791 mark = xfrm_mark_get(attrs, &m);
1793 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1797 if (x->km.state != XFRM_STATE_VALID)
1800 err = xfrm_replay_verify_len(x->replay_esn, rp);
1804 spin_lock_bh(&x->lock);
1805 xfrm_update_ae_params(x, attrs, 1);
1806 spin_unlock_bh(&x->lock);
1808 c.event = nlh->nlmsg_type;
1809 c.seq = nlh->nlmsg_seq;
1810 c.pid = nlh->nlmsg_pid;
1811 c.data.aevent = XFRM_AE_CU;
1812 km_state_notify(x, &c);
1819 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1820 struct nlattr **attrs)
1822 struct net *net = sock_net(skb->sk);
1824 u8 type = XFRM_POLICY_TYPE_MAIN;
1826 struct xfrm_audit audit_info;
1828 err = copy_from_user_policy_type(&type, attrs);
1832 audit_info.loginuid = audit_get_loginuid(current);
1833 audit_info.sessionid = audit_get_sessionid(current);
1834 security_task_getsecid(current, &audit_info.secid);
1835 err = xfrm_policy_flush(net, type, &audit_info);
1837 if (err == -ESRCH) /* empty table */
1843 c.event = nlh->nlmsg_type;
1844 c.seq = nlh->nlmsg_seq;
1845 c.pid = nlh->nlmsg_pid;
1847 km_policy_notify(NULL, 0, &c);
1851 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1852 struct nlattr **attrs)
1854 struct net *net = sock_net(skb->sk);
1855 struct xfrm_policy *xp;
1856 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1857 struct xfrm_userpolicy_info *p = &up->pol;
1858 u8 type = XFRM_POLICY_TYPE_MAIN;
1861 u32 mark = xfrm_mark_get(attrs, &m);
1863 err = copy_from_user_policy_type(&type, attrs);
1867 err = verify_policy_dir(p->dir);
1872 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1874 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1875 struct xfrm_sec_ctx *ctx;
1877 err = verify_sec_ctx_len(attrs);
1883 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1885 err = security_xfrm_policy_alloc(&ctx, uctx);
1889 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1890 &p->sel, ctx, 0, &err);
1891 security_xfrm_policy_free(ctx);
1896 if (unlikely(xp->walk.dead))
1901 uid_t loginuid = audit_get_loginuid(current);
1902 u32 sessionid = audit_get_sessionid(current);
1905 security_task_getsecid(current, &sid);
1906 xfrm_policy_delete(xp, p->dir);
1907 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1910 // reset the timers here?
1911 WARN(1, "Dont know what to do with soft policy expire\n");
1913 km_policy_expired(xp, p->dir, up->hard, current->pid);
1920 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1921 struct nlattr **attrs)
1923 struct net *net = sock_net(skb->sk);
1924 struct xfrm_state *x;
1926 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1927 struct xfrm_usersa_info *p = &ue->state;
1929 u32 mark = xfrm_mark_get(attrs, &m);
1931 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1937 spin_lock_bh(&x->lock);
1939 if (x->km.state != XFRM_STATE_VALID)
1941 km_state_expired(x, ue->hard, current->pid);
1944 uid_t loginuid = audit_get_loginuid(current);
1945 u32 sessionid = audit_get_sessionid(current);
1948 security_task_getsecid(current, &sid);
1949 __xfrm_state_delete(x);
1950 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1954 spin_unlock_bh(&x->lock);
1959 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1960 struct nlattr **attrs)
1962 struct net *net = sock_net(skb->sk);
1963 struct xfrm_policy *xp;
1964 struct xfrm_user_tmpl *ut;
1966 struct nlattr *rt = attrs[XFRMA_TMPL];
1967 struct xfrm_mark mark;
1969 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1970 struct xfrm_state *x = xfrm_state_alloc(net);
1976 xfrm_mark_get(attrs, &mark);
1978 err = verify_newpolicy_info(&ua->policy);
1983 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
1987 memcpy(&x->id, &ua->id, sizeof(ua->id));
1988 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1989 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1990 xp->mark.m = x->mark.m = mark.m;
1991 xp->mark.v = x->mark.v = mark.v;
1993 /* extract the templates and for each call km_key */
1994 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1995 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1996 memcpy(&x->id, &t->id, sizeof(x->id));
1997 x->props.mode = t->mode;
1998 x->props.reqid = t->reqid;
1999 x->props.family = ut->family;
2000 t->aalgos = ua->aalgos;
2001 t->ealgos = ua->ealgos;
2002 t->calgos = ua->calgos;
2003 err = km_query(x, t, xp);
2013 WARN(1, "BAD policy passed\n");
2020 #ifdef CONFIG_XFRM_MIGRATE
2021 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2022 struct xfrm_kmaddress *k,
2023 struct nlattr **attrs, int *num)
2025 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2026 struct xfrm_user_migrate *um;
2030 struct xfrm_user_kmaddress *uk;
2032 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2033 memcpy(&k->local, &uk->local, sizeof(k->local));
2034 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2035 k->family = uk->family;
2036 k->reserved = uk->reserved;
2040 num_migrate = nla_len(rt) / sizeof(*um);
2042 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2045 for (i = 0; i < num_migrate; i++, um++, ma++) {
2046 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2047 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2048 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2049 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2051 ma->proto = um->proto;
2052 ma->mode = um->mode;
2053 ma->reqid = um->reqid;
2055 ma->old_family = um->old_family;
2056 ma->new_family = um->new_family;
2063 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2064 struct nlattr **attrs)
2066 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2067 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2068 struct xfrm_kmaddress km, *kmp;
2073 if (attrs[XFRMA_MIGRATE] == NULL)
2076 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2078 err = copy_from_user_policy_type(&type, attrs);
2082 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2089 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
2094 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2095 struct nlattr **attrs)
2097 return -ENOPROTOOPT;
2101 #ifdef CONFIG_XFRM_MIGRATE
2102 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2104 struct xfrm_user_migrate um;
2106 memset(&um, 0, sizeof(um));
2107 um.proto = m->proto;
2109 um.reqid = m->reqid;
2110 um.old_family = m->old_family;
2111 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2112 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2113 um.new_family = m->new_family;
2114 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2115 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2117 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2120 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2122 struct xfrm_user_kmaddress uk;
2124 memset(&uk, 0, sizeof(uk));
2125 uk.family = k->family;
2126 uk.reserved = k->reserved;
2127 memcpy(&uk.local, &k->local, sizeof(uk.local));
2128 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2130 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2133 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2135 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2136 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2137 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2138 + userpolicy_type_attrsize();
2141 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2142 int num_migrate, const struct xfrm_kmaddress *k,
2143 const struct xfrm_selector *sel, u8 dir, u8 type)
2145 const struct xfrm_migrate *mp;
2146 struct xfrm_userpolicy_id *pol_id;
2147 struct nlmsghdr *nlh;
2150 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2154 pol_id = nlmsg_data(nlh);
2155 /* copy data from selector, dir, and type to the pol_id */
2156 memset(pol_id, 0, sizeof(*pol_id));
2157 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2160 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2163 if (copy_to_user_policy_type(type, skb) < 0)
2166 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2167 if (copy_to_user_migrate(mp, skb) < 0)
2171 return nlmsg_end(skb, nlh);
2173 nlmsg_cancel(skb, nlh);
2177 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2178 const struct xfrm_migrate *m, int num_migrate,
2179 const struct xfrm_kmaddress *k)
2181 struct net *net = &init_net;
2182 struct sk_buff *skb;
2184 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2189 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2192 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2195 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2196 const struct xfrm_migrate *m, int num_migrate,
2197 const struct xfrm_kmaddress *k)
2199 return -ENOPROTOOPT;
2203 #define XMSGSIZE(type) sizeof(struct type)
2205 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2206 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2207 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2208 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2209 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2210 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2211 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2212 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2213 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2214 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2215 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2216 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2217 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2218 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2219 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2220 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2221 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2222 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2223 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2224 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2225 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2230 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2231 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2232 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2233 [XFRMA_LASTUSED] = { .type = NLA_U64},
2234 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2235 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2236 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2237 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2238 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2239 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2240 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2241 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2242 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2243 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2244 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2245 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2246 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2247 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2248 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2249 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2250 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2251 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2252 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2253 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2256 static struct xfrm_link {
2257 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2258 int (*dump)(struct sk_buff *, struct netlink_callback *);
2259 int (*done)(struct netlink_callback *);
2260 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2261 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2262 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2263 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2264 .dump = xfrm_dump_sa,
2265 .done = xfrm_dump_sa_done },
2266 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2267 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2268 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2269 .dump = xfrm_dump_policy,
2270 .done = xfrm_dump_policy_done },
2271 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2272 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2273 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2274 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2275 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2276 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2277 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2278 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2279 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2280 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2281 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2282 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2283 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2286 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2288 struct net *net = sock_net(skb->sk);
2289 struct nlattr *attrs[XFRMA_MAX+1];
2290 struct xfrm_link *link;
2293 type = nlh->nlmsg_type;
2294 if (type > XFRM_MSG_MAX)
2297 type -= XFRM_MSG_BASE;
2298 link = &xfrm_dispatch[type];
2300 /* All operations require privileges, even GET */
2301 if (!capable(CAP_NET_ADMIN))
2304 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2305 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2306 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2307 if (link->dump == NULL)
2311 struct netlink_dump_control c = {
2315 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2319 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2324 if (link->doit == NULL)
2327 return link->doit(skb, nlh, attrs);
2330 static void xfrm_netlink_rcv(struct sk_buff *skb)
2332 mutex_lock(&xfrm_cfg_mutex);
2333 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2334 mutex_unlock(&xfrm_cfg_mutex);
2337 static inline size_t xfrm_expire_msgsize(void)
2339 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2340 + nla_total_size(sizeof(struct xfrm_mark));
2343 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2345 struct xfrm_user_expire *ue;
2346 struct nlmsghdr *nlh;
2348 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2352 ue = nlmsg_data(nlh);
2353 copy_to_user_state(x, &ue->state);
2354 ue->hard = (c->data.hard != 0) ? 1 : 0;
2356 if (xfrm_mark_put(skb, &x->mark))
2357 goto nla_put_failure;
2359 return nlmsg_end(skb, nlh);
2365 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2367 struct net *net = xs_net(x);
2368 struct sk_buff *skb;
2370 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2374 if (build_expire(skb, x, c) < 0) {
2379 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2382 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2384 struct net *net = xs_net(x);
2385 struct sk_buff *skb;
2387 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2391 if (build_aevent(skb, x, c) < 0)
2394 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2397 static int xfrm_notify_sa_flush(const struct km_event *c)
2399 struct net *net = c->net;
2400 struct xfrm_usersa_flush *p;
2401 struct nlmsghdr *nlh;
2402 struct sk_buff *skb;
2403 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2405 skb = nlmsg_new(len, GFP_ATOMIC);
2409 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2415 p = nlmsg_data(nlh);
2416 p->proto = c->data.proto;
2418 nlmsg_end(skb, nlh);
2420 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2423 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2427 l += nla_total_size(aead_len(x->aead));
2429 l += nla_total_size(sizeof(struct xfrm_algo) +
2430 (x->aalg->alg_key_len + 7) / 8);
2431 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2434 l += nla_total_size(xfrm_alg_len(x->ealg));
2436 l += nla_total_size(sizeof(*x->calg));
2438 l += nla_total_size(sizeof(*x->encap));
2440 l += nla_total_size(sizeof(x->tfcpad));
2442 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2444 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2445 x->security->ctx_len);
2447 l += nla_total_size(sizeof(*x->coaddr));
2449 /* Must count x->lastused as it may become non-zero behind our back. */
2450 l += nla_total_size(sizeof(u64));
2455 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2457 struct net *net = xs_net(x);
2458 struct xfrm_usersa_info *p;
2459 struct xfrm_usersa_id *id;
2460 struct nlmsghdr *nlh;
2461 struct sk_buff *skb;
2462 int len = xfrm_sa_len(x);
2465 headlen = sizeof(*p);
2466 if (c->event == XFRM_MSG_DELSA) {
2467 len += nla_total_size(headlen);
2468 headlen = sizeof(*id);
2469 len += nla_total_size(sizeof(struct xfrm_mark));
2471 len += NLMSG_ALIGN(headlen);
2473 skb = nlmsg_new(len, GFP_ATOMIC);
2477 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2479 goto nla_put_failure;
2481 p = nlmsg_data(nlh);
2482 if (c->event == XFRM_MSG_DELSA) {
2483 struct nlattr *attr;
2485 id = nlmsg_data(nlh);
2486 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2487 id->spi = x->id.spi;
2488 id->family = x->props.family;
2489 id->proto = x->id.proto;
2491 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2493 goto nla_put_failure;
2498 if (copy_to_user_state_extra(x, p, skb))
2499 goto nla_put_failure;
2501 nlmsg_end(skb, nlh);
2503 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2506 /* Somebody screwed up with xfrm_sa_len! */
2512 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2516 case XFRM_MSG_EXPIRE:
2517 return xfrm_exp_state_notify(x, c);
2518 case XFRM_MSG_NEWAE:
2519 return xfrm_aevent_state_notify(x, c);
2520 case XFRM_MSG_DELSA:
2521 case XFRM_MSG_UPDSA:
2522 case XFRM_MSG_NEWSA:
2523 return xfrm_notify_sa(x, c);
2524 case XFRM_MSG_FLUSHSA:
2525 return xfrm_notify_sa_flush(c);
2527 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2536 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2537 struct xfrm_policy *xp)
2539 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2540 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2541 + nla_total_size(sizeof(struct xfrm_mark))
2542 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2543 + userpolicy_type_attrsize();
2546 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2547 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2550 struct xfrm_user_acquire *ua;
2551 struct nlmsghdr *nlh;
2552 __u32 seq = xfrm_get_acqseq();
2554 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2558 ua = nlmsg_data(nlh);
2559 memcpy(&ua->id, &x->id, sizeof(ua->id));
2560 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2561 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2562 copy_to_user_policy(xp, &ua->policy, dir);
2563 ua->aalgos = xt->aalgos;
2564 ua->ealgos = xt->ealgos;
2565 ua->calgos = xt->calgos;
2566 ua->seq = x->km.seq = seq;
2568 if (copy_to_user_tmpl(xp, skb) < 0)
2570 if (copy_to_user_state_sec_ctx(x, skb))
2572 if (copy_to_user_policy_type(xp->type, skb) < 0)
2574 if (xfrm_mark_put(skb, &xp->mark))
2575 goto nla_put_failure;
2577 return nlmsg_end(skb, nlh);
2581 nlmsg_cancel(skb, nlh);
2585 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2586 struct xfrm_policy *xp, int dir)
2588 struct net *net = xs_net(x);
2589 struct sk_buff *skb;
2591 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2595 if (build_acquire(skb, x, xt, xp, dir) < 0)
2598 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2601 /* User gives us xfrm_user_policy_info followed by an array of 0
2602 * or more templates.
2604 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2605 u8 *data, int len, int *dir)
2607 struct net *net = sock_net(sk);
2608 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2609 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2610 struct xfrm_policy *xp;
2613 switch (sk->sk_family) {
2615 if (opt != IP_XFRM_POLICY) {
2620 #if IS_ENABLED(CONFIG_IPV6)
2622 if (opt != IPV6_XFRM_POLICY) {
2635 if (len < sizeof(*p) ||
2636 verify_newpolicy_info(p))
2639 nr = ((len - sizeof(*p)) / sizeof(*ut));
2640 if (validate_tmpl(nr, ut, p->sel.family))
2643 if (p->dir > XFRM_POLICY_OUT)
2646 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2652 copy_from_user_policy(xp, p);
2653 xp->type = XFRM_POLICY_TYPE_MAIN;
2654 copy_templates(xp, ut, nr);
2661 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2663 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2664 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2665 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2666 + nla_total_size(sizeof(struct xfrm_mark))
2667 + userpolicy_type_attrsize();
2670 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2671 int dir, const struct km_event *c)
2673 struct xfrm_user_polexpire *upe;
2674 struct nlmsghdr *nlh;
2675 int hard = c->data.hard;
2677 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2681 upe = nlmsg_data(nlh);
2682 copy_to_user_policy(xp, &upe->pol, dir);
2683 if (copy_to_user_tmpl(xp, skb) < 0)
2685 if (copy_to_user_sec_ctx(xp, skb))
2687 if (copy_to_user_policy_type(xp->type, skb) < 0)
2689 if (xfrm_mark_put(skb, &xp->mark))
2690 goto nla_put_failure;
2693 return nlmsg_end(skb, nlh);
2697 nlmsg_cancel(skb, nlh);
2701 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2703 struct net *net = xp_net(xp);
2704 struct sk_buff *skb;
2706 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2710 if (build_polexpire(skb, xp, dir, c) < 0)
2713 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2716 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2718 struct net *net = xp_net(xp);
2719 struct xfrm_userpolicy_info *p;
2720 struct xfrm_userpolicy_id *id;
2721 struct nlmsghdr *nlh;
2722 struct sk_buff *skb;
2723 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2726 headlen = sizeof(*p);
2727 if (c->event == XFRM_MSG_DELPOLICY) {
2728 len += nla_total_size(headlen);
2729 headlen = sizeof(*id);
2731 len += userpolicy_type_attrsize();
2732 len += nla_total_size(sizeof(struct xfrm_mark));
2733 len += NLMSG_ALIGN(headlen);
2735 skb = nlmsg_new(len, GFP_ATOMIC);
2739 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2743 p = nlmsg_data(nlh);
2744 if (c->event == XFRM_MSG_DELPOLICY) {
2745 struct nlattr *attr;
2747 id = nlmsg_data(nlh);
2748 memset(id, 0, sizeof(*id));
2751 id->index = xp->index;
2753 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2755 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2762 copy_to_user_policy(xp, p, dir);
2763 if (copy_to_user_tmpl(xp, skb) < 0)
2765 if (copy_to_user_policy_type(xp->type, skb) < 0)
2768 if (xfrm_mark_put(skb, &xp->mark))
2769 goto nla_put_failure;
2771 nlmsg_end(skb, nlh);
2773 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2781 static int xfrm_notify_policy_flush(const struct km_event *c)
2783 struct net *net = c->net;
2784 struct nlmsghdr *nlh;
2785 struct sk_buff *skb;
2787 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2791 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2794 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2797 nlmsg_end(skb, nlh);
2799 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2806 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2810 case XFRM_MSG_NEWPOLICY:
2811 case XFRM_MSG_UPDPOLICY:
2812 case XFRM_MSG_DELPOLICY:
2813 return xfrm_notify_policy(xp, dir, c);
2814 case XFRM_MSG_FLUSHPOLICY:
2815 return xfrm_notify_policy_flush(c);
2816 case XFRM_MSG_POLEXPIRE:
2817 return xfrm_exp_policy_notify(xp, dir, c);
2819 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2827 static inline size_t xfrm_report_msgsize(void)
2829 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2832 static int build_report(struct sk_buff *skb, u8 proto,
2833 struct xfrm_selector *sel, xfrm_address_t *addr)
2835 struct xfrm_user_report *ur;
2836 struct nlmsghdr *nlh;
2838 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2842 ur = nlmsg_data(nlh);
2844 memcpy(&ur->sel, sel, sizeof(ur->sel));
2847 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2849 return nlmsg_end(skb, nlh);
2852 nlmsg_cancel(skb, nlh);
2856 static int xfrm_send_report(struct net *net, u8 proto,
2857 struct xfrm_selector *sel, xfrm_address_t *addr)
2859 struct sk_buff *skb;
2861 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2865 if (build_report(skb, proto, sel, addr) < 0)
2868 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2871 static inline size_t xfrm_mapping_msgsize(void)
2873 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2876 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2877 xfrm_address_t *new_saddr, __be16 new_sport)
2879 struct xfrm_user_mapping *um;
2880 struct nlmsghdr *nlh;
2882 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2886 um = nlmsg_data(nlh);
2888 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2889 um->id.spi = x->id.spi;
2890 um->id.family = x->props.family;
2891 um->id.proto = x->id.proto;
2892 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2893 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2894 um->new_sport = new_sport;
2895 um->old_sport = x->encap->encap_sport;
2896 um->reqid = x->props.reqid;
2898 return nlmsg_end(skb, nlh);
2901 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2904 struct net *net = xs_net(x);
2905 struct sk_buff *skb;
2907 if (x->id.proto != IPPROTO_ESP)
2913 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2917 if (build_mapping(skb, x, ipaddr, sport) < 0)
2920 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2923 static struct xfrm_mgr netlink_mgr = {
2925 .notify = xfrm_send_state_notify,
2926 .acquire = xfrm_send_acquire,
2927 .compile_policy = xfrm_compile_policy,
2928 .notify_policy = xfrm_send_policy_notify,
2929 .report = xfrm_send_report,
2930 .migrate = xfrm_send_migrate,
2931 .new_mapping = xfrm_send_mapping,
2934 static int __net_init xfrm_user_net_init(struct net *net)
2938 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
2939 xfrm_netlink_rcv, NULL, THIS_MODULE);
2942 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2943 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2947 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
2950 list_for_each_entry(net, net_exit_list, exit_list)
2951 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
2953 list_for_each_entry(net, net_exit_list, exit_list)
2954 netlink_kernel_release(net->xfrm.nlsk_stash);
2957 static struct pernet_operations xfrm_user_net_ops = {
2958 .init = xfrm_user_net_init,
2959 .exit_batch = xfrm_user_net_exit,
2962 static int __init xfrm_user_init(void)
2966 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2968 rv = register_pernet_subsys(&xfrm_user_net_ops);
2971 rv = xfrm_register_km(&netlink_mgr);
2973 unregister_pernet_subsys(&xfrm_user_net_ops);
2977 static void __exit xfrm_user_exit(void)
2979 xfrm_unregister_km(&netlink_mgr);
2980 unregister_pernet_subsys(&xfrm_user_net_ops);
2983 module_init(xfrm_user_init);
2984 module_exit(xfrm_user_exit);
2985 MODULE_LICENSE("GPL");
2986 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);