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];
126 struct xfrm_replay_state_esn *rs;
128 if (p->flags & XFRM_STATE_ESN) {
134 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
137 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
138 nla_len(rt) != sizeof(*rs))
145 if (p->id.proto != IPPROTO_ESP)
148 if (p->replay_window != 0)
154 static int verify_newsa_info(struct xfrm_usersa_info *p,
155 struct nlattr **attrs)
165 #if IS_ENABLED(CONFIG_IPV6)
177 switch (p->id.proto) {
179 if ((!attrs[XFRMA_ALG_AUTH] &&
180 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
181 attrs[XFRMA_ALG_AEAD] ||
182 attrs[XFRMA_ALG_CRYPT] ||
183 attrs[XFRMA_ALG_COMP] ||
189 if (attrs[XFRMA_ALG_COMP])
191 if (!attrs[XFRMA_ALG_AUTH] &&
192 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
193 !attrs[XFRMA_ALG_CRYPT] &&
194 !attrs[XFRMA_ALG_AEAD])
196 if ((attrs[XFRMA_ALG_AUTH] ||
197 attrs[XFRMA_ALG_AUTH_TRUNC] ||
198 attrs[XFRMA_ALG_CRYPT]) &&
199 attrs[XFRMA_ALG_AEAD])
201 if (attrs[XFRMA_TFCPAD] &&
202 p->mode != XFRM_MODE_TUNNEL)
207 if (!attrs[XFRMA_ALG_COMP] ||
208 attrs[XFRMA_ALG_AEAD] ||
209 attrs[XFRMA_ALG_AUTH] ||
210 attrs[XFRMA_ALG_AUTH_TRUNC] ||
211 attrs[XFRMA_ALG_CRYPT] ||
216 #if IS_ENABLED(CONFIG_IPV6)
217 case IPPROTO_DSTOPTS:
218 case IPPROTO_ROUTING:
219 if (attrs[XFRMA_ALG_COMP] ||
220 attrs[XFRMA_ALG_AUTH] ||
221 attrs[XFRMA_ALG_AUTH_TRUNC] ||
222 attrs[XFRMA_ALG_AEAD] ||
223 attrs[XFRMA_ALG_CRYPT] ||
224 attrs[XFRMA_ENCAP] ||
225 attrs[XFRMA_SEC_CTX] ||
226 attrs[XFRMA_TFCPAD] ||
227 !attrs[XFRMA_COADDR])
236 if ((err = verify_aead(attrs)))
238 if ((err = verify_auth_trunc(attrs)))
240 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
242 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
244 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
246 if ((err = verify_sec_ctx_len(attrs)))
248 if ((err = verify_replay(p, attrs)))
253 case XFRM_MODE_TRANSPORT:
254 case XFRM_MODE_TUNNEL:
255 case XFRM_MODE_ROUTEOPTIMIZATION:
269 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
270 struct xfrm_algo_desc *(*get_byname)(const char *, int),
273 struct xfrm_algo *p, *ualg;
274 struct xfrm_algo_desc *algo;
279 ualg = nla_data(rta);
281 algo = get_byname(ualg->alg_name, 1);
284 *props = algo->desc.sadb_alg_id;
286 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
290 strcpy(p->alg_name, algo->name);
295 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
298 struct xfrm_algo *ualg;
299 struct xfrm_algo_auth *p;
300 struct xfrm_algo_desc *algo;
305 ualg = nla_data(rta);
307 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
310 *props = algo->desc.sadb_alg_id;
312 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
316 strcpy(p->alg_name, algo->name);
317 p->alg_key_len = ualg->alg_key_len;
318 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
319 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
325 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
328 struct xfrm_algo_auth *p, *ualg;
329 struct xfrm_algo_desc *algo;
334 ualg = nla_data(rta);
336 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
339 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
340 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
342 *props = algo->desc.sadb_alg_id;
344 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
348 strcpy(p->alg_name, algo->name);
349 if (!p->alg_trunc_len)
350 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
356 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
359 struct xfrm_algo_aead *p, *ualg;
360 struct xfrm_algo_desc *algo;
365 ualg = nla_data(rta);
367 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
370 *props = algo->desc.sadb_alg_id;
372 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
376 strcpy(p->alg_name, algo->name);
381 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
384 struct xfrm_replay_state_esn *up;
387 if (!replay_esn || !rp)
391 ulen = xfrm_replay_state_esn_len(up);
393 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
399 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
400 struct xfrm_replay_state_esn **preplay_esn,
403 struct xfrm_replay_state_esn *p, *pp, *up;
410 klen = xfrm_replay_state_esn_len(up);
411 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
413 p = kzalloc(klen, GFP_KERNEL);
417 pp = kzalloc(klen, GFP_KERNEL);
424 memcpy(pp, up, ulen);
432 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
437 len += sizeof(struct xfrm_user_sec_ctx);
438 len += xfrm_ctx->ctx_len;
443 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
445 memcpy(&x->id, &p->id, sizeof(x->id));
446 memcpy(&x->sel, &p->sel, sizeof(x->sel));
447 memcpy(&x->lft, &p->lft, sizeof(x->lft));
448 x->props.mode = p->mode;
449 x->props.replay_window = min_t(unsigned int, p->replay_window,
450 sizeof(x->replay.bitmap) * 8);
451 x->props.reqid = p->reqid;
452 x->props.family = p->family;
453 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
454 x->props.flags = p->flags;
456 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
457 x->sel.family = p->family;
461 * someday when pfkey also has support, we could have the code
462 * somehow made shareable and move it to xfrm_state.c - JHS
465 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
468 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
469 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
470 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
471 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
472 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
475 struct xfrm_replay_state_esn *replay_esn;
476 replay_esn = nla_data(re);
477 memcpy(x->replay_esn, replay_esn,
478 xfrm_replay_state_esn_len(replay_esn));
479 memcpy(x->preplay_esn, replay_esn,
480 xfrm_replay_state_esn_len(replay_esn));
484 struct xfrm_replay_state *replay;
485 replay = nla_data(rp);
486 memcpy(&x->replay, replay, sizeof(*replay));
487 memcpy(&x->preplay, replay, sizeof(*replay));
491 struct xfrm_lifetime_cur *ltime;
492 ltime = nla_data(lt);
493 x->curlft.bytes = ltime->bytes;
494 x->curlft.packets = ltime->packets;
495 x->curlft.add_time = ltime->add_time;
496 x->curlft.use_time = ltime->use_time;
500 x->replay_maxage = nla_get_u32(et);
503 x->replay_maxdiff = nla_get_u32(rt);
506 static struct xfrm_state *xfrm_state_construct(struct net *net,
507 struct xfrm_usersa_info *p,
508 struct nlattr **attrs,
511 struct xfrm_state *x = xfrm_state_alloc(net);
517 copy_from_user_state(x, p);
519 if (attrs[XFRMA_SA_EXTRA_FLAGS])
520 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
522 if ((err = attach_aead(&x->aead, &x->props.ealgo,
523 attrs[XFRMA_ALG_AEAD])))
525 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
526 attrs[XFRMA_ALG_AUTH_TRUNC])))
528 if (!x->props.aalgo) {
529 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
530 attrs[XFRMA_ALG_AUTH])))
533 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
534 xfrm_ealg_get_byname,
535 attrs[XFRMA_ALG_CRYPT])))
537 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
538 xfrm_calg_get_byname,
539 attrs[XFRMA_ALG_COMP])))
542 if (attrs[XFRMA_ENCAP]) {
543 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
544 sizeof(*x->encap), GFP_KERNEL);
545 if (x->encap == NULL)
549 if (attrs[XFRMA_TFCPAD])
550 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
552 if (attrs[XFRMA_COADDR]) {
553 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
554 sizeof(*x->coaddr), GFP_KERNEL);
555 if (x->coaddr == NULL)
559 xfrm_mark_get(attrs, &x->mark);
561 err = __xfrm_init_state(x, false);
565 if (attrs[XFRMA_SEC_CTX] &&
566 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
569 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
570 attrs[XFRMA_REPLAY_ESN_VAL])))
574 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
575 /* sysctl_xfrm_aevent_etime is in 100ms units */
576 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
578 if ((err = xfrm_init_replay(x)))
581 /* override default values from above */
582 xfrm_update_ae_params(x, attrs, 0);
587 x->km.state = XFRM_STATE_DEAD;
594 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
595 struct nlattr **attrs)
597 struct net *net = sock_net(skb->sk);
598 struct xfrm_usersa_info *p = nlmsg_data(nlh);
599 struct xfrm_state *x;
602 kuid_t loginuid = audit_get_loginuid(current);
603 u32 sessionid = audit_get_sessionid(current);
606 err = verify_newsa_info(p, attrs);
610 x = xfrm_state_construct(net, p, attrs, &err);
615 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
616 err = xfrm_state_add(x);
618 err = xfrm_state_update(x);
620 security_task_getsecid(current, &sid);
621 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
624 x->km.state = XFRM_STATE_DEAD;
629 c.seq = nlh->nlmsg_seq;
630 c.portid = nlh->nlmsg_pid;
631 c.event = nlh->nlmsg_type;
633 km_state_notify(x, &c);
639 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
640 struct xfrm_usersa_id *p,
641 struct nlattr **attrs,
644 struct xfrm_state *x = NULL;
647 u32 mark = xfrm_mark_get(attrs, &m);
649 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
651 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
653 xfrm_address_t *saddr = NULL;
655 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
662 x = xfrm_state_lookup_byaddr(net, mark,
664 p->proto, p->family);
673 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
674 struct nlattr **attrs)
676 struct net *net = sock_net(skb->sk);
677 struct xfrm_state *x;
680 struct xfrm_usersa_id *p = nlmsg_data(nlh);
681 kuid_t loginuid = audit_get_loginuid(current);
682 u32 sessionid = audit_get_sessionid(current);
685 x = xfrm_user_state_lookup(net, p, attrs, &err);
689 if ((err = security_xfrm_state_delete(x)) != 0)
692 if (xfrm_state_kern(x)) {
697 err = xfrm_state_delete(x);
702 c.seq = nlh->nlmsg_seq;
703 c.portid = nlh->nlmsg_pid;
704 c.event = nlh->nlmsg_type;
705 km_state_notify(x, &c);
708 security_task_getsecid(current, &sid);
709 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
714 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
716 memset(p, 0, sizeof(*p));
717 memcpy(&p->id, &x->id, sizeof(p->id));
718 memcpy(&p->sel, &x->sel, sizeof(p->sel));
719 memcpy(&p->lft, &x->lft, sizeof(p->lft));
720 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
721 memcpy(&p->stats, &x->stats, sizeof(p->stats));
722 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
723 p->mode = x->props.mode;
724 p->replay_window = x->props.replay_window;
725 p->reqid = x->props.reqid;
726 p->family = x->props.family;
727 p->flags = x->props.flags;
731 struct xfrm_dump_info {
732 struct sk_buff *in_skb;
733 struct sk_buff *out_skb;
738 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
740 struct xfrm_user_sec_ctx *uctx;
742 int ctx_size = sizeof(*uctx) + s->ctx_len;
744 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
748 uctx = nla_data(attr);
749 uctx->exttype = XFRMA_SEC_CTX;
750 uctx->len = ctx_size;
751 uctx->ctx_doi = s->ctx_doi;
752 uctx->ctx_alg = s->ctx_alg;
753 uctx->ctx_len = s->ctx_len;
754 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
759 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
761 struct xfrm_algo *algo;
764 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
765 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
769 algo = nla_data(nla);
770 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
771 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
772 algo->alg_key_len = auth->alg_key_len;
777 /* Don't change this without updating xfrm_sa_len! */
778 static int copy_to_user_state_extra(struct xfrm_state *x,
779 struct xfrm_usersa_info *p,
784 copy_to_user_state(x, p);
786 if (x->props.extra_flags) {
787 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
788 x->props.extra_flags);
794 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
799 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
804 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
809 ret = copy_to_user_auth(x->aalg, skb);
811 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
812 xfrm_alg_auth_len(x->aalg), x->aalg);
817 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
822 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
827 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
832 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
836 ret = xfrm_mark_put(skb, &x->mark);
840 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
841 xfrm_replay_state_esn_len(x->replay_esn),
847 ret = copy_sec_ctx(x->security, skb);
852 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
854 struct xfrm_dump_info *sp = ptr;
855 struct sk_buff *in_skb = sp->in_skb;
856 struct sk_buff *skb = sp->out_skb;
857 struct xfrm_usersa_info *p;
858 struct nlmsghdr *nlh;
861 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
862 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
868 err = copy_to_user_state_extra(x, p, skb);
870 nlmsg_cancel(skb, nlh);
877 static int xfrm_dump_sa_done(struct netlink_callback *cb)
879 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
880 struct sock *sk = cb->skb->sk;
881 struct net *net = sock_net(sk);
883 xfrm_state_walk_done(walk, net);
887 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
889 struct net *net = sock_net(skb->sk);
890 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
891 struct xfrm_dump_info info;
893 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
894 sizeof(cb->args) - sizeof(cb->args[0]));
896 info.in_skb = cb->skb;
898 info.nlmsg_seq = cb->nlh->nlmsg_seq;
899 info.nlmsg_flags = NLM_F_MULTI;
903 xfrm_state_walk_init(walk, 0);
906 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
911 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
912 struct xfrm_state *x, u32 seq)
914 struct xfrm_dump_info info;
918 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
920 return ERR_PTR(-ENOMEM);
922 info.in_skb = in_skb;
924 info.nlmsg_seq = seq;
925 info.nlmsg_flags = 0;
927 err = dump_one_state(x, 0, &info);
936 static inline size_t xfrm_spdinfo_msgsize(void)
938 return NLMSG_ALIGN(4)
939 + nla_total_size(sizeof(struct xfrmu_spdinfo))
940 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
943 static int build_spdinfo(struct sk_buff *skb, struct net *net,
944 u32 portid, u32 seq, u32 flags)
946 struct xfrmk_spdinfo si;
947 struct xfrmu_spdinfo spc;
948 struct xfrmu_spdhinfo sph;
949 struct nlmsghdr *nlh;
953 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
954 if (nlh == NULL) /* shouldn't really happen ... */
959 xfrm_spd_getinfo(net, &si);
960 spc.incnt = si.incnt;
961 spc.outcnt = si.outcnt;
962 spc.fwdcnt = si.fwdcnt;
963 spc.inscnt = si.inscnt;
964 spc.outscnt = si.outscnt;
965 spc.fwdscnt = si.fwdscnt;
966 sph.spdhcnt = si.spdhcnt;
967 sph.spdhmcnt = si.spdhmcnt;
969 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
971 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
973 nlmsg_cancel(skb, nlh);
977 return nlmsg_end(skb, nlh);
980 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
981 struct nlattr **attrs)
983 struct net *net = sock_net(skb->sk);
984 struct sk_buff *r_skb;
985 u32 *flags = nlmsg_data(nlh);
986 u32 sportid = NETLINK_CB(skb).portid;
987 u32 seq = nlh->nlmsg_seq;
989 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
993 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
996 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
999 static inline size_t xfrm_sadinfo_msgsize(void)
1001 return NLMSG_ALIGN(4)
1002 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1003 + nla_total_size(4); /* XFRMA_SAD_CNT */
1006 static int build_sadinfo(struct sk_buff *skb, struct net *net,
1007 u32 portid, u32 seq, u32 flags)
1009 struct xfrmk_sadinfo si;
1010 struct xfrmu_sadhinfo sh;
1011 struct nlmsghdr *nlh;
1015 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1016 if (nlh == NULL) /* shouldn't really happen ... */
1019 f = nlmsg_data(nlh);
1021 xfrm_sad_getinfo(net, &si);
1023 sh.sadhmcnt = si.sadhmcnt;
1024 sh.sadhcnt = si.sadhcnt;
1026 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1028 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1030 nlmsg_cancel(skb, nlh);
1034 return nlmsg_end(skb, nlh);
1037 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1038 struct nlattr **attrs)
1040 struct net *net = sock_net(skb->sk);
1041 struct sk_buff *r_skb;
1042 u32 *flags = nlmsg_data(nlh);
1043 u32 sportid = NETLINK_CB(skb).portid;
1044 u32 seq = nlh->nlmsg_seq;
1046 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1050 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
1053 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
1056 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1057 struct nlattr **attrs)
1059 struct net *net = sock_net(skb->sk);
1060 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1061 struct xfrm_state *x;
1062 struct sk_buff *resp_skb;
1065 x = xfrm_user_state_lookup(net, p, attrs, &err);
1069 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1070 if (IS_ERR(resp_skb)) {
1071 err = PTR_ERR(resp_skb);
1073 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1080 static int verify_userspi_info(struct xfrm_userspi_info *p)
1082 switch (p->info.id.proto) {
1088 /* IPCOMP spi is 16-bits. */
1089 if (p->max >= 0x10000)
1097 if (p->min > p->max)
1103 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1104 struct nlattr **attrs)
1106 struct net *net = sock_net(skb->sk);
1107 struct xfrm_state *x;
1108 struct xfrm_userspi_info *p;
1109 struct sk_buff *resp_skb;
1110 xfrm_address_t *daddr;
1116 p = nlmsg_data(nlh);
1117 err = verify_userspi_info(p);
1121 family = p->info.family;
1122 daddr = &p->info.id.daddr;
1126 mark = xfrm_mark_get(attrs, &m);
1128 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1129 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1136 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1137 p->info.id.proto, daddr,
1144 err = xfrm_alloc_spi(x, p->min, p->max);
1148 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1149 if (IS_ERR(resp_skb)) {
1150 err = PTR_ERR(resp_skb);
1154 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1162 static int verify_policy_dir(u8 dir)
1165 case XFRM_POLICY_IN:
1166 case XFRM_POLICY_OUT:
1167 case XFRM_POLICY_FWD:
1177 static int verify_policy_type(u8 type)
1180 case XFRM_POLICY_TYPE_MAIN:
1181 #ifdef CONFIG_XFRM_SUB_POLICY
1182 case XFRM_POLICY_TYPE_SUB:
1193 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1198 case XFRM_SHARE_ANY:
1199 case XFRM_SHARE_SESSION:
1200 case XFRM_SHARE_USER:
1201 case XFRM_SHARE_UNIQUE:
1208 switch (p->action) {
1209 case XFRM_POLICY_ALLOW:
1210 case XFRM_POLICY_BLOCK:
1217 switch (p->sel.family) {
1222 #if IS_ENABLED(CONFIG_IPV6)
1225 return -EAFNOSUPPORT;
1232 ret = verify_policy_dir(p->dir);
1235 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1241 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1243 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1244 struct xfrm_user_sec_ctx *uctx;
1249 uctx = nla_data(rt);
1250 return security_xfrm_policy_alloc(&pol->security, uctx);
1253 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1259 for (i = 0; i < nr; i++, ut++) {
1260 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1262 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1263 memcpy(&t->saddr, &ut->saddr,
1264 sizeof(xfrm_address_t));
1265 t->reqid = ut->reqid;
1267 t->share = ut->share;
1268 t->optional = ut->optional;
1269 t->aalgos = ut->aalgos;
1270 t->ealgos = ut->ealgos;
1271 t->calgos = ut->calgos;
1272 /* If all masks are ~0, then we allow all algorithms. */
1273 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1274 t->encap_family = ut->family;
1278 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1282 if (nr > XFRM_MAX_DEPTH)
1285 for (i = 0; i < nr; i++) {
1286 /* We never validated the ut->family value, so many
1287 * applications simply leave it at zero. The check was
1288 * never made and ut->family was ignored because all
1289 * templates could be assumed to have the same family as
1290 * the policy itself. Now that we will have ipv4-in-ipv6
1291 * and ipv6-in-ipv4 tunnels, this is no longer true.
1294 ut[i].family = family;
1296 switch (ut[i].family) {
1299 #if IS_ENABLED(CONFIG_IPV6)
1311 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1313 struct nlattr *rt = attrs[XFRMA_TMPL];
1318 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1319 int nr = nla_len(rt) / sizeof(*utmpl);
1322 err = validate_tmpl(nr, utmpl, pol->family);
1326 copy_templates(pol, utmpl, nr);
1331 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1333 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1334 struct xfrm_userpolicy_type *upt;
1335 u8 type = XFRM_POLICY_TYPE_MAIN;
1343 err = verify_policy_type(type);
1351 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1353 xp->priority = p->priority;
1354 xp->index = p->index;
1355 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1356 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1357 xp->action = p->action;
1358 xp->flags = p->flags;
1359 xp->family = p->sel.family;
1360 /* XXX xp->share = p->share; */
1363 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1365 memset(p, 0, sizeof(*p));
1366 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1367 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1368 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1369 p->priority = xp->priority;
1370 p->index = xp->index;
1371 p->sel.family = xp->family;
1373 p->action = xp->action;
1374 p->flags = xp->flags;
1375 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1378 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1380 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1388 copy_from_user_policy(xp, p);
1390 err = copy_from_user_policy_type(&xp->type, attrs);
1394 if (!(err = copy_from_user_tmpl(xp, attrs)))
1395 err = copy_from_user_sec_ctx(xp, attrs);
1399 xfrm_mark_get(attrs, &xp->mark);
1405 xfrm_policy_destroy(xp);
1409 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1410 struct nlattr **attrs)
1412 struct net *net = sock_net(skb->sk);
1413 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1414 struct xfrm_policy *xp;
1418 kuid_t loginuid = audit_get_loginuid(current);
1419 u32 sessionid = audit_get_sessionid(current);
1422 err = verify_newpolicy_info(p);
1425 err = verify_sec_ctx_len(attrs);
1429 xp = xfrm_policy_construct(net, p, attrs, &err);
1433 /* shouldn't excl be based on nlh flags??
1434 * Aha! this is anti-netlink really i.e more pfkey derived
1435 * in netlink excl is a flag and you wouldnt need
1436 * a type XFRM_MSG_UPDPOLICY - JHS */
1437 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1438 err = xfrm_policy_insert(p->dir, xp, excl);
1439 security_task_getsecid(current, &sid);
1440 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1443 security_xfrm_policy_free(xp->security);
1448 c.event = nlh->nlmsg_type;
1449 c.seq = nlh->nlmsg_seq;
1450 c.portid = nlh->nlmsg_pid;
1451 km_policy_notify(xp, p->dir, &c);
1458 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1460 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1463 if (xp->xfrm_nr == 0)
1466 for (i = 0; i < xp->xfrm_nr; i++) {
1467 struct xfrm_user_tmpl *up = &vec[i];
1468 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1470 memset(up, 0, sizeof(*up));
1471 memcpy(&up->id, &kp->id, sizeof(up->id));
1472 up->family = kp->encap_family;
1473 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1474 up->reqid = kp->reqid;
1475 up->mode = kp->mode;
1476 up->share = kp->share;
1477 up->optional = kp->optional;
1478 up->aalgos = kp->aalgos;
1479 up->ealgos = kp->ealgos;
1480 up->calgos = kp->calgos;
1483 return nla_put(skb, XFRMA_TMPL,
1484 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1487 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1490 return copy_sec_ctx(x->security, skb);
1495 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1498 return copy_sec_ctx(xp->security, skb);
1501 static inline size_t userpolicy_type_attrsize(void)
1503 #ifdef CONFIG_XFRM_SUB_POLICY
1504 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1510 #ifdef CONFIG_XFRM_SUB_POLICY
1511 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1513 struct xfrm_userpolicy_type upt = {
1517 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1521 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1527 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1529 struct xfrm_dump_info *sp = ptr;
1530 struct xfrm_userpolicy_info *p;
1531 struct sk_buff *in_skb = sp->in_skb;
1532 struct sk_buff *skb = sp->out_skb;
1533 struct nlmsghdr *nlh;
1536 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
1537 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1541 p = nlmsg_data(nlh);
1542 copy_to_user_policy(xp, p, dir);
1543 err = copy_to_user_tmpl(xp, skb);
1545 err = copy_to_user_sec_ctx(xp, skb);
1547 err = copy_to_user_policy_type(xp->type, skb);
1549 err = xfrm_mark_put(skb, &xp->mark);
1551 nlmsg_cancel(skb, nlh);
1554 nlmsg_end(skb, nlh);
1558 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1560 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1561 struct net *net = sock_net(cb->skb->sk);
1563 xfrm_policy_walk_done(walk, net);
1567 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1569 struct net *net = sock_net(skb->sk);
1570 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1571 struct xfrm_dump_info info;
1573 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1574 sizeof(cb->args) - sizeof(cb->args[0]));
1576 info.in_skb = cb->skb;
1578 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1579 info.nlmsg_flags = NLM_F_MULTI;
1583 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1586 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1591 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1592 struct xfrm_policy *xp,
1595 struct xfrm_dump_info info;
1596 struct sk_buff *skb;
1599 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1601 return ERR_PTR(-ENOMEM);
1603 info.in_skb = in_skb;
1605 info.nlmsg_seq = seq;
1606 info.nlmsg_flags = 0;
1608 err = dump_one_policy(xp, dir, 0, &info);
1611 return ERR_PTR(err);
1617 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1618 struct nlattr **attrs)
1620 struct net *net = sock_net(skb->sk);
1621 struct xfrm_policy *xp;
1622 struct xfrm_userpolicy_id *p;
1623 u8 type = XFRM_POLICY_TYPE_MAIN;
1628 u32 mark = xfrm_mark_get(attrs, &m);
1630 p = nlmsg_data(nlh);
1631 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1633 err = copy_from_user_policy_type(&type, attrs);
1637 err = verify_policy_dir(p->dir);
1642 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1644 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1645 struct xfrm_sec_ctx *ctx;
1647 err = verify_sec_ctx_len(attrs);
1653 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1655 err = security_xfrm_policy_alloc(&ctx, uctx);
1659 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1661 security_xfrm_policy_free(ctx);
1667 struct sk_buff *resp_skb;
1669 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1670 if (IS_ERR(resp_skb)) {
1671 err = PTR_ERR(resp_skb);
1673 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1674 NETLINK_CB(skb).portid);
1677 kuid_t loginuid = audit_get_loginuid(current);
1678 u32 sessionid = audit_get_sessionid(current);
1681 security_task_getsecid(current, &sid);
1682 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1688 c.data.byid = p->index;
1689 c.event = nlh->nlmsg_type;
1690 c.seq = nlh->nlmsg_seq;
1691 c.portid = nlh->nlmsg_pid;
1692 km_policy_notify(xp, p->dir, &c);
1697 if (delete && err == 0)
1698 xfrm_garbage_collect(net);
1702 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1703 struct nlattr **attrs)
1705 struct net *net = sock_net(skb->sk);
1707 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1708 struct xfrm_audit audit_info;
1711 audit_info.loginuid = audit_get_loginuid(current);
1712 audit_info.sessionid = audit_get_sessionid(current);
1713 security_task_getsecid(current, &audit_info.secid);
1714 err = xfrm_state_flush(net, p->proto, &audit_info);
1716 if (err == -ESRCH) /* empty table */
1720 c.data.proto = p->proto;
1721 c.event = nlh->nlmsg_type;
1722 c.seq = nlh->nlmsg_seq;
1723 c.portid = nlh->nlmsg_pid;
1725 km_state_notify(NULL, &c);
1730 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1732 size_t replay_size = x->replay_esn ?
1733 xfrm_replay_state_esn_len(x->replay_esn) :
1734 sizeof(struct xfrm_replay_state);
1736 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1737 + nla_total_size(replay_size)
1738 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1739 + nla_total_size(sizeof(struct xfrm_mark))
1740 + nla_total_size(4) /* XFRM_AE_RTHR */
1741 + nla_total_size(4); /* XFRM_AE_ETHR */
1744 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1746 struct xfrm_aevent_id *id;
1747 struct nlmsghdr *nlh;
1750 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1754 id = nlmsg_data(nlh);
1755 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1756 id->sa_id.spi = x->id.spi;
1757 id->sa_id.family = x->props.family;
1758 id->sa_id.proto = x->id.proto;
1759 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1760 id->reqid = x->props.reqid;
1761 id->flags = c->data.aevent;
1763 if (x->replay_esn) {
1764 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1765 xfrm_replay_state_esn_len(x->replay_esn),
1768 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1773 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1777 if (id->flags & XFRM_AE_RTHR) {
1778 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1782 if (id->flags & XFRM_AE_ETHR) {
1783 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1784 x->replay_maxage * 10 / HZ);
1788 err = xfrm_mark_put(skb, &x->mark);
1792 return nlmsg_end(skb, nlh);
1795 nlmsg_cancel(skb, nlh);
1799 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1800 struct nlattr **attrs)
1802 struct net *net = sock_net(skb->sk);
1803 struct xfrm_state *x;
1804 struct sk_buff *r_skb;
1809 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1810 struct xfrm_usersa_id *id = &p->sa_id;
1812 mark = xfrm_mark_get(attrs, &m);
1814 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1818 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1819 if (r_skb == NULL) {
1825 * XXX: is this lock really needed - none of the other
1826 * gets lock (the concern is things getting updated
1827 * while we are still reading) - jhs
1829 spin_lock_bh(&x->lock);
1830 c.data.aevent = p->flags;
1831 c.seq = nlh->nlmsg_seq;
1832 c.portid = nlh->nlmsg_pid;
1834 if (build_aevent(r_skb, x, &c) < 0)
1836 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
1837 spin_unlock_bh(&x->lock);
1842 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1843 struct nlattr **attrs)
1845 struct net *net = sock_net(skb->sk);
1846 struct xfrm_state *x;
1851 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1852 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1853 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1854 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1856 if (!lt && !rp && !re)
1859 /* pedantic mode - thou shalt sayeth replaceth */
1860 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1863 mark = xfrm_mark_get(attrs, &m);
1865 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1869 if (x->km.state != XFRM_STATE_VALID)
1872 err = xfrm_replay_verify_len(x->replay_esn, re);
1876 spin_lock_bh(&x->lock);
1877 xfrm_update_ae_params(x, attrs, 1);
1878 spin_unlock_bh(&x->lock);
1880 c.event = nlh->nlmsg_type;
1881 c.seq = nlh->nlmsg_seq;
1882 c.portid = nlh->nlmsg_pid;
1883 c.data.aevent = XFRM_AE_CU;
1884 km_state_notify(x, &c);
1891 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1892 struct nlattr **attrs)
1894 struct net *net = sock_net(skb->sk);
1896 u8 type = XFRM_POLICY_TYPE_MAIN;
1898 struct xfrm_audit audit_info;
1900 err = copy_from_user_policy_type(&type, attrs);
1904 audit_info.loginuid = audit_get_loginuid(current);
1905 audit_info.sessionid = audit_get_sessionid(current);
1906 security_task_getsecid(current, &audit_info.secid);
1907 err = xfrm_policy_flush(net, type, &audit_info);
1909 if (err == -ESRCH) /* empty table */
1915 c.event = nlh->nlmsg_type;
1916 c.seq = nlh->nlmsg_seq;
1917 c.portid = nlh->nlmsg_pid;
1919 km_policy_notify(NULL, 0, &c);
1923 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1924 struct nlattr **attrs)
1926 struct net *net = sock_net(skb->sk);
1927 struct xfrm_policy *xp;
1928 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1929 struct xfrm_userpolicy_info *p = &up->pol;
1930 u8 type = XFRM_POLICY_TYPE_MAIN;
1933 u32 mark = xfrm_mark_get(attrs, &m);
1935 err = copy_from_user_policy_type(&type, attrs);
1939 err = verify_policy_dir(p->dir);
1944 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1946 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1947 struct xfrm_sec_ctx *ctx;
1949 err = verify_sec_ctx_len(attrs);
1955 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1957 err = security_xfrm_policy_alloc(&ctx, uctx);
1961 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1962 &p->sel, ctx, 0, &err);
1963 security_xfrm_policy_free(ctx);
1968 if (unlikely(xp->walk.dead))
1973 kuid_t loginuid = audit_get_loginuid(current);
1974 u32 sessionid = audit_get_sessionid(current);
1977 security_task_getsecid(current, &sid);
1978 xfrm_policy_delete(xp, p->dir);
1979 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1982 // reset the timers here?
1983 WARN(1, "Dont know what to do with soft policy expire\n");
1985 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
1992 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1993 struct nlattr **attrs)
1995 struct net *net = sock_net(skb->sk);
1996 struct xfrm_state *x;
1998 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1999 struct xfrm_usersa_info *p = &ue->state;
2001 u32 mark = xfrm_mark_get(attrs, &m);
2003 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
2009 spin_lock_bh(&x->lock);
2011 if (x->km.state != XFRM_STATE_VALID)
2013 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
2016 kuid_t loginuid = audit_get_loginuid(current);
2017 u32 sessionid = audit_get_sessionid(current);
2020 security_task_getsecid(current, &sid);
2021 __xfrm_state_delete(x);
2022 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
2026 spin_unlock_bh(&x->lock);
2031 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2032 struct nlattr **attrs)
2034 struct net *net = sock_net(skb->sk);
2035 struct xfrm_policy *xp;
2036 struct xfrm_user_tmpl *ut;
2038 struct nlattr *rt = attrs[XFRMA_TMPL];
2039 struct xfrm_mark mark;
2041 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2042 struct xfrm_state *x = xfrm_state_alloc(net);
2048 xfrm_mark_get(attrs, &mark);
2050 err = verify_newpolicy_info(&ua->policy);
2055 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2059 memcpy(&x->id, &ua->id, sizeof(ua->id));
2060 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2061 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2062 xp->mark.m = x->mark.m = mark.m;
2063 xp->mark.v = x->mark.v = mark.v;
2065 /* extract the templates and for each call km_key */
2066 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2067 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2068 memcpy(&x->id, &t->id, sizeof(x->id));
2069 x->props.mode = t->mode;
2070 x->props.reqid = t->reqid;
2071 x->props.family = ut->family;
2072 t->aalgos = ua->aalgos;
2073 t->ealgos = ua->ealgos;
2074 t->calgos = ua->calgos;
2075 err = km_query(x, t, xp);
2085 WARN(1, "BAD policy passed\n");
2092 #ifdef CONFIG_XFRM_MIGRATE
2093 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2094 struct xfrm_kmaddress *k,
2095 struct nlattr **attrs, int *num)
2097 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2098 struct xfrm_user_migrate *um;
2102 struct xfrm_user_kmaddress *uk;
2104 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2105 memcpy(&k->local, &uk->local, sizeof(k->local));
2106 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2107 k->family = uk->family;
2108 k->reserved = uk->reserved;
2112 num_migrate = nla_len(rt) / sizeof(*um);
2114 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2117 for (i = 0; i < num_migrate; i++, um++, ma++) {
2118 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2119 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2120 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2121 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2123 ma->proto = um->proto;
2124 ma->mode = um->mode;
2125 ma->reqid = um->reqid;
2127 ma->old_family = um->old_family;
2128 ma->new_family = um->new_family;
2135 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2136 struct nlattr **attrs)
2138 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2139 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2140 struct xfrm_kmaddress km, *kmp;
2144 struct net *net = sock_net(skb->sk);
2146 if (attrs[XFRMA_MIGRATE] == NULL)
2149 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2151 err = copy_from_user_policy_type(&type, attrs);
2155 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2162 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
2167 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2168 struct nlattr **attrs)
2170 return -ENOPROTOOPT;
2174 #ifdef CONFIG_XFRM_MIGRATE
2175 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2177 struct xfrm_user_migrate um;
2179 memset(&um, 0, sizeof(um));
2180 um.proto = m->proto;
2182 um.reqid = m->reqid;
2183 um.old_family = m->old_family;
2184 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2185 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2186 um.new_family = m->new_family;
2187 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2188 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2190 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2193 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2195 struct xfrm_user_kmaddress uk;
2197 memset(&uk, 0, sizeof(uk));
2198 uk.family = k->family;
2199 uk.reserved = k->reserved;
2200 memcpy(&uk.local, &k->local, sizeof(uk.local));
2201 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2203 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2206 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2208 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2209 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2210 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2211 + userpolicy_type_attrsize();
2214 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2215 int num_migrate, const struct xfrm_kmaddress *k,
2216 const struct xfrm_selector *sel, u8 dir, u8 type)
2218 const struct xfrm_migrate *mp;
2219 struct xfrm_userpolicy_id *pol_id;
2220 struct nlmsghdr *nlh;
2223 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2227 pol_id = nlmsg_data(nlh);
2228 /* copy data from selector, dir, and type to the pol_id */
2229 memset(pol_id, 0, sizeof(*pol_id));
2230 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2234 err = copy_to_user_kmaddress(k, skb);
2238 err = copy_to_user_policy_type(type, skb);
2241 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2242 err = copy_to_user_migrate(mp, skb);
2247 return nlmsg_end(skb, nlh);
2250 nlmsg_cancel(skb, nlh);
2254 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2255 const struct xfrm_migrate *m, int num_migrate,
2256 const struct xfrm_kmaddress *k)
2258 struct net *net = &init_net;
2259 struct sk_buff *skb;
2261 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2266 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2269 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2272 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2273 const struct xfrm_migrate *m, int num_migrate,
2274 const struct xfrm_kmaddress *k)
2276 return -ENOPROTOOPT;
2280 #define XMSGSIZE(type) sizeof(struct type)
2282 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2283 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2284 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2285 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2286 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2287 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2288 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2289 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2290 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2291 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2292 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2293 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2294 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2295 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2296 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2297 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2298 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2299 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2300 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2301 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2302 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2307 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2308 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2309 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2310 [XFRMA_LASTUSED] = { .type = NLA_U64},
2311 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2312 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2313 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2314 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2315 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2316 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2317 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2318 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2319 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2320 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2321 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2322 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2323 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2324 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2325 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2326 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2327 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2328 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2329 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2330 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2331 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
2334 static const struct xfrm_link {
2335 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2336 int (*dump)(struct sk_buff *, struct netlink_callback *);
2337 int (*done)(struct netlink_callback *);
2338 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2339 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2340 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2341 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2342 .dump = xfrm_dump_sa,
2343 .done = xfrm_dump_sa_done },
2344 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2345 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2346 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2347 .dump = xfrm_dump_policy,
2348 .done = xfrm_dump_policy_done },
2349 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2350 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2351 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2352 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2353 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2354 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2355 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2356 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2357 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2358 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2359 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2360 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2361 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2364 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2366 struct net *net = sock_net(skb->sk);
2367 struct nlattr *attrs[XFRMA_MAX+1];
2368 const struct xfrm_link *link;
2371 type = nlh->nlmsg_type;
2372 if (type > XFRM_MSG_MAX)
2375 type -= XFRM_MSG_BASE;
2376 link = &xfrm_dispatch[type];
2378 /* All operations require privileges, even GET */
2379 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2382 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2383 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2384 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2385 if (link->dump == NULL)
2389 struct netlink_dump_control c = {
2393 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2397 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2402 if (link->doit == NULL)
2405 return link->doit(skb, nlh, attrs);
2408 static void xfrm_netlink_rcv(struct sk_buff *skb)
2410 struct net *net = sock_net(skb->sk);
2412 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
2413 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2414 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
2417 static inline size_t xfrm_expire_msgsize(void)
2419 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2420 + nla_total_size(sizeof(struct xfrm_mark));
2423 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2425 struct xfrm_user_expire *ue;
2426 struct nlmsghdr *nlh;
2429 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2433 ue = nlmsg_data(nlh);
2434 copy_to_user_state(x, &ue->state);
2435 ue->hard = (c->data.hard != 0) ? 1 : 0;
2437 err = xfrm_mark_put(skb, &x->mark);
2441 return nlmsg_end(skb, nlh);
2444 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2446 struct net *net = xs_net(x);
2447 struct sk_buff *skb;
2449 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2453 if (build_expire(skb, x, c) < 0) {
2458 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2461 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2463 struct net *net = xs_net(x);
2464 struct sk_buff *skb;
2466 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2470 if (build_aevent(skb, x, c) < 0)
2473 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2476 static int xfrm_notify_sa_flush(const struct km_event *c)
2478 struct net *net = c->net;
2479 struct xfrm_usersa_flush *p;
2480 struct nlmsghdr *nlh;
2481 struct sk_buff *skb;
2482 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2484 skb = nlmsg_new(len, GFP_ATOMIC);
2488 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2494 p = nlmsg_data(nlh);
2495 p->proto = c->data.proto;
2497 nlmsg_end(skb, nlh);
2499 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2502 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2506 l += nla_total_size(aead_len(x->aead));
2508 l += nla_total_size(sizeof(struct xfrm_algo) +
2509 (x->aalg->alg_key_len + 7) / 8);
2510 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2513 l += nla_total_size(xfrm_alg_len(x->ealg));
2515 l += nla_total_size(sizeof(*x->calg));
2517 l += nla_total_size(sizeof(*x->encap));
2519 l += nla_total_size(sizeof(x->tfcpad));
2521 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2523 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2524 x->security->ctx_len);
2526 l += nla_total_size(sizeof(*x->coaddr));
2527 if (x->props.extra_flags)
2528 l += nla_total_size(sizeof(x->props.extra_flags));
2530 /* Must count x->lastused as it may become non-zero behind our back. */
2531 l += nla_total_size(sizeof(u64));
2536 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2538 struct net *net = xs_net(x);
2539 struct xfrm_usersa_info *p;
2540 struct xfrm_usersa_id *id;
2541 struct nlmsghdr *nlh;
2542 struct sk_buff *skb;
2543 int len = xfrm_sa_len(x);
2546 headlen = sizeof(*p);
2547 if (c->event == XFRM_MSG_DELSA) {
2548 len += nla_total_size(headlen);
2549 headlen = sizeof(*id);
2550 len += nla_total_size(sizeof(struct xfrm_mark));
2552 len += NLMSG_ALIGN(headlen);
2554 skb = nlmsg_new(len, GFP_ATOMIC);
2558 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2563 p = nlmsg_data(nlh);
2564 if (c->event == XFRM_MSG_DELSA) {
2565 struct nlattr *attr;
2567 id = nlmsg_data(nlh);
2568 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2569 id->spi = x->id.spi;
2570 id->family = x->props.family;
2571 id->proto = x->id.proto;
2573 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2580 err = copy_to_user_state_extra(x, p, skb);
2584 nlmsg_end(skb, nlh);
2586 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2593 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2597 case XFRM_MSG_EXPIRE:
2598 return xfrm_exp_state_notify(x, c);
2599 case XFRM_MSG_NEWAE:
2600 return xfrm_aevent_state_notify(x, c);
2601 case XFRM_MSG_DELSA:
2602 case XFRM_MSG_UPDSA:
2603 case XFRM_MSG_NEWSA:
2604 return xfrm_notify_sa(x, c);
2605 case XFRM_MSG_FLUSHSA:
2606 return xfrm_notify_sa_flush(c);
2608 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2617 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2618 struct xfrm_policy *xp)
2620 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2621 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2622 + nla_total_size(sizeof(struct xfrm_mark))
2623 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2624 + userpolicy_type_attrsize();
2627 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2628 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
2630 __u32 seq = xfrm_get_acqseq();
2631 struct xfrm_user_acquire *ua;
2632 struct nlmsghdr *nlh;
2635 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2639 ua = nlmsg_data(nlh);
2640 memcpy(&ua->id, &x->id, sizeof(ua->id));
2641 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2642 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2643 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
2644 ua->aalgos = xt->aalgos;
2645 ua->ealgos = xt->ealgos;
2646 ua->calgos = xt->calgos;
2647 ua->seq = x->km.seq = seq;
2649 err = copy_to_user_tmpl(xp, skb);
2651 err = copy_to_user_state_sec_ctx(x, skb);
2653 err = copy_to_user_policy_type(xp->type, skb);
2655 err = xfrm_mark_put(skb, &xp->mark);
2657 nlmsg_cancel(skb, nlh);
2661 return nlmsg_end(skb, nlh);
2664 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2665 struct xfrm_policy *xp)
2667 struct net *net = xs_net(x);
2668 struct sk_buff *skb;
2670 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2674 if (build_acquire(skb, x, xt, xp) < 0)
2677 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2680 /* User gives us xfrm_user_policy_info followed by an array of 0
2681 * or more templates.
2683 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2684 u8 *data, int len, int *dir)
2686 struct net *net = sock_net(sk);
2687 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2688 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2689 struct xfrm_policy *xp;
2692 switch (sk->sk_family) {
2694 if (opt != IP_XFRM_POLICY) {
2699 #if IS_ENABLED(CONFIG_IPV6)
2701 if (opt != IPV6_XFRM_POLICY) {
2714 if (len < sizeof(*p) ||
2715 verify_newpolicy_info(p))
2718 nr = ((len - sizeof(*p)) / sizeof(*ut));
2719 if (validate_tmpl(nr, ut, p->sel.family))
2722 if (p->dir > XFRM_POLICY_OUT)
2725 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2731 copy_from_user_policy(xp, p);
2732 xp->type = XFRM_POLICY_TYPE_MAIN;
2733 copy_templates(xp, ut, nr);
2740 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2742 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2743 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2744 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2745 + nla_total_size(sizeof(struct xfrm_mark))
2746 + userpolicy_type_attrsize();
2749 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2750 int dir, const struct km_event *c)
2752 struct xfrm_user_polexpire *upe;
2753 int hard = c->data.hard;
2754 struct nlmsghdr *nlh;
2757 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2761 upe = nlmsg_data(nlh);
2762 copy_to_user_policy(xp, &upe->pol, dir);
2763 err = copy_to_user_tmpl(xp, skb);
2765 err = copy_to_user_sec_ctx(xp, skb);
2767 err = copy_to_user_policy_type(xp->type, skb);
2769 err = xfrm_mark_put(skb, &xp->mark);
2771 nlmsg_cancel(skb, nlh);
2776 return nlmsg_end(skb, nlh);
2779 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2781 struct net *net = xp_net(xp);
2782 struct sk_buff *skb;
2784 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2788 if (build_polexpire(skb, xp, dir, c) < 0)
2791 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2794 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2796 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2797 struct net *net = xp_net(xp);
2798 struct xfrm_userpolicy_info *p;
2799 struct xfrm_userpolicy_id *id;
2800 struct nlmsghdr *nlh;
2801 struct sk_buff *skb;
2804 headlen = sizeof(*p);
2805 if (c->event == XFRM_MSG_DELPOLICY) {
2806 len += nla_total_size(headlen);
2807 headlen = sizeof(*id);
2809 len += userpolicy_type_attrsize();
2810 len += nla_total_size(sizeof(struct xfrm_mark));
2811 len += NLMSG_ALIGN(headlen);
2813 skb = nlmsg_new(len, GFP_ATOMIC);
2817 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
2822 p = nlmsg_data(nlh);
2823 if (c->event == XFRM_MSG_DELPOLICY) {
2824 struct nlattr *attr;
2826 id = nlmsg_data(nlh);
2827 memset(id, 0, sizeof(*id));
2830 id->index = xp->index;
2832 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2834 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2842 copy_to_user_policy(xp, p, dir);
2843 err = copy_to_user_tmpl(xp, skb);
2845 err = copy_to_user_policy_type(xp->type, skb);
2847 err = xfrm_mark_put(skb, &xp->mark);
2851 nlmsg_end(skb, nlh);
2853 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2860 static int xfrm_notify_policy_flush(const struct km_event *c)
2862 struct net *net = c->net;
2863 struct nlmsghdr *nlh;
2864 struct sk_buff *skb;
2867 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2871 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2875 err = copy_to_user_policy_type(c->data.type, skb);
2879 nlmsg_end(skb, nlh);
2881 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2888 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2892 case XFRM_MSG_NEWPOLICY:
2893 case XFRM_MSG_UPDPOLICY:
2894 case XFRM_MSG_DELPOLICY:
2895 return xfrm_notify_policy(xp, dir, c);
2896 case XFRM_MSG_FLUSHPOLICY:
2897 return xfrm_notify_policy_flush(c);
2898 case XFRM_MSG_POLEXPIRE:
2899 return xfrm_exp_policy_notify(xp, dir, c);
2901 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2909 static inline size_t xfrm_report_msgsize(void)
2911 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2914 static int build_report(struct sk_buff *skb, u8 proto,
2915 struct xfrm_selector *sel, xfrm_address_t *addr)
2917 struct xfrm_user_report *ur;
2918 struct nlmsghdr *nlh;
2920 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2924 ur = nlmsg_data(nlh);
2926 memcpy(&ur->sel, sel, sizeof(ur->sel));
2929 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2931 nlmsg_cancel(skb, nlh);
2935 return nlmsg_end(skb, nlh);
2938 static int xfrm_send_report(struct net *net, u8 proto,
2939 struct xfrm_selector *sel, xfrm_address_t *addr)
2941 struct sk_buff *skb;
2943 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2947 if (build_report(skb, proto, sel, addr) < 0)
2950 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2953 static inline size_t xfrm_mapping_msgsize(void)
2955 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2958 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2959 xfrm_address_t *new_saddr, __be16 new_sport)
2961 struct xfrm_user_mapping *um;
2962 struct nlmsghdr *nlh;
2964 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2968 um = nlmsg_data(nlh);
2970 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2971 um->id.spi = x->id.spi;
2972 um->id.family = x->props.family;
2973 um->id.proto = x->id.proto;
2974 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2975 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2976 um->new_sport = new_sport;
2977 um->old_sport = x->encap->encap_sport;
2978 um->reqid = x->props.reqid;
2980 return nlmsg_end(skb, nlh);
2983 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2986 struct net *net = xs_net(x);
2987 struct sk_buff *skb;
2989 if (x->id.proto != IPPROTO_ESP)
2995 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2999 if (build_mapping(skb, x, ipaddr, sport) < 0)
3002 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3005 static struct xfrm_mgr netlink_mgr = {
3007 .notify = xfrm_send_state_notify,
3008 .acquire = xfrm_send_acquire,
3009 .compile_policy = xfrm_compile_policy,
3010 .notify_policy = xfrm_send_policy_notify,
3011 .report = xfrm_send_report,
3012 .migrate = xfrm_send_migrate,
3013 .new_mapping = xfrm_send_mapping,
3016 static int __net_init xfrm_user_net_init(struct net *net)
3019 struct netlink_kernel_cfg cfg = {
3020 .groups = XFRMNLGRP_MAX,
3021 .input = xfrm_netlink_rcv,
3024 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
3027 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
3028 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3032 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3035 list_for_each_entry(net, net_exit_list, exit_list)
3036 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3038 list_for_each_entry(net, net_exit_list, exit_list)
3039 netlink_kernel_release(net->xfrm.nlsk_stash);
3042 static struct pernet_operations xfrm_user_net_ops = {
3043 .init = xfrm_user_net_init,
3044 .exit_batch = xfrm_user_net_exit,
3047 static int __init xfrm_user_init(void)
3051 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3053 rv = register_pernet_subsys(&xfrm_user_net_ops);
3056 rv = xfrm_register_km(&netlink_mgr);
3058 unregister_pernet_subsys(&xfrm_user_net_ops);
3062 static void __exit xfrm_user_exit(void)
3064 xfrm_unregister_km(&netlink_mgr);
3065 unregister_pernet_subsys(&xfrm_user_net_ops);
3068 module_init(xfrm_user_init);
3069 module_exit(xfrm_user_exit);
3070 MODULE_LICENSE("GPL");
3071 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);