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 = p->replay_window;
450 x->props.reqid = p->reqid;
451 x->props.family = p->family;
452 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
453 x->props.flags = p->flags;
455 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
456 x->sel.family = p->family;
460 * someday when pfkey also has support, we could have the code
461 * somehow made shareable and move it to xfrm_state.c - JHS
464 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
466 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
467 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
468 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
469 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
470 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
473 struct xfrm_replay_state_esn *replay_esn;
474 replay_esn = nla_data(re);
475 memcpy(x->replay_esn, replay_esn,
476 xfrm_replay_state_esn_len(replay_esn));
477 memcpy(x->preplay_esn, replay_esn,
478 xfrm_replay_state_esn_len(replay_esn));
482 struct xfrm_replay_state *replay;
483 replay = nla_data(rp);
484 memcpy(&x->replay, replay, sizeof(*replay));
485 memcpy(&x->preplay, replay, sizeof(*replay));
489 struct xfrm_lifetime_cur *ltime;
490 ltime = nla_data(lt);
491 x->curlft.bytes = ltime->bytes;
492 x->curlft.packets = ltime->packets;
493 x->curlft.add_time = ltime->add_time;
494 x->curlft.use_time = ltime->use_time;
498 x->replay_maxage = nla_get_u32(et);
501 x->replay_maxdiff = nla_get_u32(rt);
504 static struct xfrm_state *xfrm_state_construct(struct net *net,
505 struct xfrm_usersa_info *p,
506 struct nlattr **attrs,
509 struct xfrm_state *x = xfrm_state_alloc(net);
515 copy_from_user_state(x, p);
517 if ((err = attach_aead(&x->aead, &x->props.ealgo,
518 attrs[XFRMA_ALG_AEAD])))
520 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
521 attrs[XFRMA_ALG_AUTH_TRUNC])))
523 if (!x->props.aalgo) {
524 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
525 attrs[XFRMA_ALG_AUTH])))
528 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
529 xfrm_ealg_get_byname,
530 attrs[XFRMA_ALG_CRYPT])))
532 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
533 xfrm_calg_get_byname,
534 attrs[XFRMA_ALG_COMP])))
537 if (attrs[XFRMA_ENCAP]) {
538 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
539 sizeof(*x->encap), GFP_KERNEL);
540 if (x->encap == NULL)
544 if (attrs[XFRMA_TFCPAD])
545 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
547 if (attrs[XFRMA_COADDR]) {
548 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
549 sizeof(*x->coaddr), GFP_KERNEL);
550 if (x->coaddr == NULL)
554 xfrm_mark_get(attrs, &x->mark);
556 err = __xfrm_init_state(x, false);
560 if (attrs[XFRMA_SEC_CTX] &&
561 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
564 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
565 attrs[XFRMA_REPLAY_ESN_VAL])))
569 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
570 /* sysctl_xfrm_aevent_etime is in 100ms units */
571 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
573 if ((err = xfrm_init_replay(x)))
576 /* override default values from above */
577 xfrm_update_ae_params(x, attrs);
582 x->km.state = XFRM_STATE_DEAD;
589 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
590 struct nlattr **attrs)
592 struct net *net = sock_net(skb->sk);
593 struct xfrm_usersa_info *p = nlmsg_data(nlh);
594 struct xfrm_state *x;
597 uid_t loginuid = audit_get_loginuid(current);
598 u32 sessionid = audit_get_sessionid(current);
601 err = verify_newsa_info(p, attrs);
605 x = xfrm_state_construct(net, p, attrs, &err);
610 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
611 err = xfrm_state_add(x);
613 err = xfrm_state_update(x);
615 security_task_getsecid(current, &sid);
616 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
619 x->km.state = XFRM_STATE_DEAD;
624 c.seq = nlh->nlmsg_seq;
625 c.pid = nlh->nlmsg_pid;
626 c.event = nlh->nlmsg_type;
628 km_state_notify(x, &c);
634 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
635 struct xfrm_usersa_id *p,
636 struct nlattr **attrs,
639 struct xfrm_state *x = NULL;
642 u32 mark = xfrm_mark_get(attrs, &m);
644 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
646 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
648 xfrm_address_t *saddr = NULL;
650 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
657 x = xfrm_state_lookup_byaddr(net, mark,
659 p->proto, p->family);
668 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
669 struct nlattr **attrs)
671 struct net *net = sock_net(skb->sk);
672 struct xfrm_state *x;
675 struct xfrm_usersa_id *p = nlmsg_data(nlh);
676 uid_t loginuid = audit_get_loginuid(current);
677 u32 sessionid = audit_get_sessionid(current);
680 x = xfrm_user_state_lookup(net, p, attrs, &err);
684 if ((err = security_xfrm_state_delete(x)) != 0)
687 if (xfrm_state_kern(x)) {
692 err = xfrm_state_delete(x);
697 c.seq = nlh->nlmsg_seq;
698 c.pid = nlh->nlmsg_pid;
699 c.event = nlh->nlmsg_type;
700 km_state_notify(x, &c);
703 security_task_getsecid(current, &sid);
704 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
709 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
711 memset(p, 0, sizeof(*p));
712 memcpy(&p->id, &x->id, sizeof(p->id));
713 memcpy(&p->sel, &x->sel, sizeof(p->sel));
714 memcpy(&p->lft, &x->lft, sizeof(p->lft));
715 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
716 memcpy(&p->stats, &x->stats, sizeof(p->stats));
717 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
718 p->mode = x->props.mode;
719 p->replay_window = x->props.replay_window;
720 p->reqid = x->props.reqid;
721 p->family = x->props.family;
722 p->flags = x->props.flags;
726 struct xfrm_dump_info {
727 struct sk_buff *in_skb;
728 struct sk_buff *out_skb;
733 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
735 struct xfrm_user_sec_ctx *uctx;
737 int ctx_size = sizeof(*uctx) + s->ctx_len;
739 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
743 uctx = nla_data(attr);
744 uctx->exttype = XFRMA_SEC_CTX;
745 uctx->len = ctx_size;
746 uctx->ctx_doi = s->ctx_doi;
747 uctx->ctx_alg = s->ctx_alg;
748 uctx->ctx_len = s->ctx_len;
749 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
754 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
756 struct xfrm_algo *algo;
759 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
760 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
764 algo = nla_data(nla);
765 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
766 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
767 algo->alg_key_len = auth->alg_key_len;
772 /* Don't change this without updating xfrm_sa_len! */
773 static int copy_to_user_state_extra(struct xfrm_state *x,
774 struct xfrm_usersa_info *p,
779 copy_to_user_state(x, p);
782 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
787 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
792 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
797 ret = copy_to_user_auth(x->aalg, skb);
799 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
800 xfrm_alg_auth_len(x->aalg), x->aalg);
805 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
810 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
815 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
820 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
824 ret = xfrm_mark_put(skb, &x->mark);
828 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
829 xfrm_replay_state_esn_len(x->replay_esn),
835 ret = copy_sec_ctx(x->security, skb);
840 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
842 struct xfrm_dump_info *sp = ptr;
843 struct sk_buff *in_skb = sp->in_skb;
844 struct sk_buff *skb = sp->out_skb;
845 struct xfrm_usersa_info *p;
846 struct nlmsghdr *nlh;
849 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
850 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
856 err = copy_to_user_state_extra(x, p, skb);
858 nlmsg_cancel(skb, nlh);
865 static int xfrm_dump_sa_done(struct netlink_callback *cb)
867 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
868 xfrm_state_walk_done(walk);
872 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
874 struct net *net = sock_net(skb->sk);
875 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
876 struct xfrm_dump_info info;
878 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
879 sizeof(cb->args) - sizeof(cb->args[0]));
881 info.in_skb = cb->skb;
883 info.nlmsg_seq = cb->nlh->nlmsg_seq;
884 info.nlmsg_flags = NLM_F_MULTI;
888 xfrm_state_walk_init(walk, 0);
891 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
896 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
897 struct xfrm_state *x, u32 seq)
899 struct xfrm_dump_info info;
903 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
905 return ERR_PTR(-ENOMEM);
907 info.in_skb = in_skb;
909 info.nlmsg_seq = seq;
910 info.nlmsg_flags = 0;
912 err = dump_one_state(x, 0, &info);
921 static inline size_t xfrm_spdinfo_msgsize(void)
923 return NLMSG_ALIGN(4)
924 + nla_total_size(sizeof(struct xfrmu_spdinfo))
925 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
928 static int build_spdinfo(struct sk_buff *skb, struct net *net,
929 u32 pid, u32 seq, u32 flags)
931 struct xfrmk_spdinfo si;
932 struct xfrmu_spdinfo spc;
933 struct xfrmu_spdhinfo sph;
934 struct nlmsghdr *nlh;
938 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
939 if (nlh == NULL) /* shouldn't really happen ... */
944 xfrm_spd_getinfo(net, &si);
945 spc.incnt = si.incnt;
946 spc.outcnt = si.outcnt;
947 spc.fwdcnt = si.fwdcnt;
948 spc.inscnt = si.inscnt;
949 spc.outscnt = si.outscnt;
950 spc.fwdscnt = si.fwdscnt;
951 sph.spdhcnt = si.spdhcnt;
952 sph.spdhmcnt = si.spdhmcnt;
954 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
956 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
958 nlmsg_cancel(skb, nlh);
962 return nlmsg_end(skb, nlh);
965 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
966 struct nlattr **attrs)
968 struct net *net = sock_net(skb->sk);
969 struct sk_buff *r_skb;
970 u32 *flags = nlmsg_data(nlh);
971 u32 spid = NETLINK_CB(skb).pid;
972 u32 seq = nlh->nlmsg_seq;
974 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
978 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
981 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
984 static inline size_t xfrm_sadinfo_msgsize(void)
986 return NLMSG_ALIGN(4)
987 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
988 + nla_total_size(4); /* XFRMA_SAD_CNT */
991 static int build_sadinfo(struct sk_buff *skb, struct net *net,
992 u32 pid, u32 seq, u32 flags)
994 struct xfrmk_sadinfo si;
995 struct xfrmu_sadhinfo sh;
996 struct nlmsghdr *nlh;
1000 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
1001 if (nlh == NULL) /* shouldn't really happen ... */
1004 f = nlmsg_data(nlh);
1006 xfrm_sad_getinfo(net, &si);
1008 sh.sadhmcnt = si.sadhmcnt;
1009 sh.sadhcnt = si.sadhcnt;
1011 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1013 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1015 nlmsg_cancel(skb, nlh);
1019 return nlmsg_end(skb, nlh);
1022 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1023 struct nlattr **attrs)
1025 struct net *net = sock_net(skb->sk);
1026 struct sk_buff *r_skb;
1027 u32 *flags = nlmsg_data(nlh);
1028 u32 spid = NETLINK_CB(skb).pid;
1029 u32 seq = nlh->nlmsg_seq;
1031 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1035 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
1038 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
1041 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1042 struct nlattr **attrs)
1044 struct net *net = sock_net(skb->sk);
1045 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1046 struct xfrm_state *x;
1047 struct sk_buff *resp_skb;
1050 x = xfrm_user_state_lookup(net, p, attrs, &err);
1054 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1055 if (IS_ERR(resp_skb)) {
1056 err = PTR_ERR(resp_skb);
1058 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1065 static int verify_userspi_info(struct xfrm_userspi_info *p)
1067 switch (p->info.id.proto) {
1073 /* IPCOMP spi is 16-bits. */
1074 if (p->max >= 0x10000)
1082 if (p->min > p->max)
1088 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1089 struct nlattr **attrs)
1091 struct net *net = sock_net(skb->sk);
1092 struct xfrm_state *x;
1093 struct xfrm_userspi_info *p;
1094 struct sk_buff *resp_skb;
1095 xfrm_address_t *daddr;
1101 p = nlmsg_data(nlh);
1102 err = verify_userspi_info(p);
1106 family = p->info.family;
1107 daddr = &p->info.id.daddr;
1111 mark = xfrm_mark_get(attrs, &m);
1113 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1114 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1121 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1122 p->info.id.proto, daddr,
1129 err = xfrm_alloc_spi(x, p->min, p->max);
1133 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1134 if (IS_ERR(resp_skb)) {
1135 err = PTR_ERR(resp_skb);
1139 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1147 static int verify_policy_dir(u8 dir)
1150 case XFRM_POLICY_IN:
1151 case XFRM_POLICY_OUT:
1152 case XFRM_POLICY_FWD:
1162 static int verify_policy_type(u8 type)
1165 case XFRM_POLICY_TYPE_MAIN:
1166 #ifdef CONFIG_XFRM_SUB_POLICY
1167 case XFRM_POLICY_TYPE_SUB:
1178 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1181 case XFRM_SHARE_ANY:
1182 case XFRM_SHARE_SESSION:
1183 case XFRM_SHARE_USER:
1184 case XFRM_SHARE_UNIQUE:
1191 switch (p->action) {
1192 case XFRM_POLICY_ALLOW:
1193 case XFRM_POLICY_BLOCK:
1200 switch (p->sel.family) {
1205 #if IS_ENABLED(CONFIG_IPV6)
1208 return -EAFNOSUPPORT;
1215 return verify_policy_dir(p->dir);
1218 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1220 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1221 struct xfrm_user_sec_ctx *uctx;
1226 uctx = nla_data(rt);
1227 return security_xfrm_policy_alloc(&pol->security, uctx);
1230 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1236 for (i = 0; i < nr; i++, ut++) {
1237 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1239 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1240 memcpy(&t->saddr, &ut->saddr,
1241 sizeof(xfrm_address_t));
1242 t->reqid = ut->reqid;
1244 t->share = ut->share;
1245 t->optional = ut->optional;
1246 t->aalgos = ut->aalgos;
1247 t->ealgos = ut->ealgos;
1248 t->calgos = ut->calgos;
1249 /* If all masks are ~0, then we allow all algorithms. */
1250 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1251 t->encap_family = ut->family;
1255 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1259 if (nr > XFRM_MAX_DEPTH)
1262 for (i = 0; i < nr; i++) {
1263 /* We never validated the ut->family value, so many
1264 * applications simply leave it at zero. The check was
1265 * never made and ut->family was ignored because all
1266 * templates could be assumed to have the same family as
1267 * the policy itself. Now that we will have ipv4-in-ipv6
1268 * and ipv6-in-ipv4 tunnels, this is no longer true.
1271 ut[i].family = family;
1273 switch (ut[i].family) {
1276 #if IS_ENABLED(CONFIG_IPV6)
1288 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1290 struct nlattr *rt = attrs[XFRMA_TMPL];
1295 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1296 int nr = nla_len(rt) / sizeof(*utmpl);
1299 err = validate_tmpl(nr, utmpl, pol->family);
1303 copy_templates(pol, utmpl, nr);
1308 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1310 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1311 struct xfrm_userpolicy_type *upt;
1312 u8 type = XFRM_POLICY_TYPE_MAIN;
1320 err = verify_policy_type(type);
1328 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1330 xp->priority = p->priority;
1331 xp->index = p->index;
1332 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1333 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1334 xp->action = p->action;
1335 xp->flags = p->flags;
1336 xp->family = p->sel.family;
1337 /* XXX xp->share = p->share; */
1340 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1342 memset(p, 0, sizeof(*p));
1343 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1344 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1345 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1346 p->priority = xp->priority;
1347 p->index = xp->index;
1348 p->sel.family = xp->family;
1350 p->action = xp->action;
1351 p->flags = xp->flags;
1352 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1355 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1357 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1365 copy_from_user_policy(xp, p);
1367 err = copy_from_user_policy_type(&xp->type, attrs);
1371 if (!(err = copy_from_user_tmpl(xp, attrs)))
1372 err = copy_from_user_sec_ctx(xp, attrs);
1376 xfrm_mark_get(attrs, &xp->mark);
1382 xfrm_policy_destroy(xp);
1386 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1387 struct nlattr **attrs)
1389 struct net *net = sock_net(skb->sk);
1390 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1391 struct xfrm_policy *xp;
1395 uid_t loginuid = audit_get_loginuid(current);
1396 u32 sessionid = audit_get_sessionid(current);
1399 err = verify_newpolicy_info(p);
1402 err = verify_sec_ctx_len(attrs);
1406 xp = xfrm_policy_construct(net, p, attrs, &err);
1410 /* shouldn't excl be based on nlh flags??
1411 * Aha! this is anti-netlink really i.e more pfkey derived
1412 * in netlink excl is a flag and you wouldnt need
1413 * a type XFRM_MSG_UPDPOLICY - JHS */
1414 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1415 err = xfrm_policy_insert(p->dir, xp, excl);
1416 security_task_getsecid(current, &sid);
1417 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1420 security_xfrm_policy_free(xp->security);
1425 c.event = nlh->nlmsg_type;
1426 c.seq = nlh->nlmsg_seq;
1427 c.pid = nlh->nlmsg_pid;
1428 km_policy_notify(xp, p->dir, &c);
1435 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1437 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1440 if (xp->xfrm_nr == 0)
1443 for (i = 0; i < xp->xfrm_nr; i++) {
1444 struct xfrm_user_tmpl *up = &vec[i];
1445 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1447 memset(up, 0, sizeof(*up));
1448 memcpy(&up->id, &kp->id, sizeof(up->id));
1449 up->family = kp->encap_family;
1450 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1451 up->reqid = kp->reqid;
1452 up->mode = kp->mode;
1453 up->share = kp->share;
1454 up->optional = kp->optional;
1455 up->aalgos = kp->aalgos;
1456 up->ealgos = kp->ealgos;
1457 up->calgos = kp->calgos;
1460 return nla_put(skb, XFRMA_TMPL,
1461 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1464 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1467 return copy_sec_ctx(x->security, skb);
1472 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1475 return copy_sec_ctx(xp->security, skb);
1478 static inline size_t userpolicy_type_attrsize(void)
1480 #ifdef CONFIG_XFRM_SUB_POLICY
1481 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1487 #ifdef CONFIG_XFRM_SUB_POLICY
1488 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1490 struct xfrm_userpolicy_type upt = {
1494 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1498 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1504 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1506 struct xfrm_dump_info *sp = ptr;
1507 struct xfrm_userpolicy_info *p;
1508 struct sk_buff *in_skb = sp->in_skb;
1509 struct sk_buff *skb = sp->out_skb;
1510 struct nlmsghdr *nlh;
1513 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1514 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1518 p = nlmsg_data(nlh);
1519 copy_to_user_policy(xp, p, dir);
1520 err = copy_to_user_tmpl(xp, skb);
1522 err = copy_to_user_sec_ctx(xp, skb);
1524 err = copy_to_user_policy_type(xp->type, skb);
1526 err = xfrm_mark_put(skb, &xp->mark);
1528 nlmsg_cancel(skb, nlh);
1531 nlmsg_end(skb, nlh);
1535 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1537 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1539 xfrm_policy_walk_done(walk);
1543 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1545 struct net *net = sock_net(skb->sk);
1546 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1547 struct xfrm_dump_info info;
1549 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1550 sizeof(cb->args) - sizeof(cb->args[0]));
1552 info.in_skb = cb->skb;
1554 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1555 info.nlmsg_flags = NLM_F_MULTI;
1559 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1562 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1567 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1568 struct xfrm_policy *xp,
1571 struct xfrm_dump_info info;
1572 struct sk_buff *skb;
1575 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1577 return ERR_PTR(-ENOMEM);
1579 info.in_skb = in_skb;
1581 info.nlmsg_seq = seq;
1582 info.nlmsg_flags = 0;
1584 err = dump_one_policy(xp, dir, 0, &info);
1587 return ERR_PTR(err);
1593 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1594 struct nlattr **attrs)
1596 struct net *net = sock_net(skb->sk);
1597 struct xfrm_policy *xp;
1598 struct xfrm_userpolicy_id *p;
1599 u8 type = XFRM_POLICY_TYPE_MAIN;
1604 u32 mark = xfrm_mark_get(attrs, &m);
1606 p = nlmsg_data(nlh);
1607 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1609 err = copy_from_user_policy_type(&type, attrs);
1613 err = verify_policy_dir(p->dir);
1618 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1620 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1621 struct xfrm_sec_ctx *ctx;
1623 err = verify_sec_ctx_len(attrs);
1629 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1631 err = security_xfrm_policy_alloc(&ctx, uctx);
1635 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1637 security_xfrm_policy_free(ctx);
1643 struct sk_buff *resp_skb;
1645 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1646 if (IS_ERR(resp_skb)) {
1647 err = PTR_ERR(resp_skb);
1649 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1650 NETLINK_CB(skb).pid);
1653 uid_t loginuid = audit_get_loginuid(current);
1654 u32 sessionid = audit_get_sessionid(current);
1657 security_task_getsecid(current, &sid);
1658 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1664 c.data.byid = p->index;
1665 c.event = nlh->nlmsg_type;
1666 c.seq = nlh->nlmsg_seq;
1667 c.pid = nlh->nlmsg_pid;
1668 km_policy_notify(xp, p->dir, &c);
1676 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1677 struct nlattr **attrs)
1679 struct net *net = sock_net(skb->sk);
1681 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1682 struct xfrm_audit audit_info;
1685 audit_info.loginuid = audit_get_loginuid(current);
1686 audit_info.sessionid = audit_get_sessionid(current);
1687 security_task_getsecid(current, &audit_info.secid);
1688 err = xfrm_state_flush(net, p->proto, &audit_info);
1690 if (err == -ESRCH) /* empty table */
1694 c.data.proto = p->proto;
1695 c.event = nlh->nlmsg_type;
1696 c.seq = nlh->nlmsg_seq;
1697 c.pid = nlh->nlmsg_pid;
1699 km_state_notify(NULL, &c);
1704 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1706 size_t replay_size = x->replay_esn ?
1707 xfrm_replay_state_esn_len(x->replay_esn) :
1708 sizeof(struct xfrm_replay_state);
1710 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1711 + nla_total_size(replay_size)
1712 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1713 + nla_total_size(sizeof(struct xfrm_mark))
1714 + nla_total_size(4) /* XFRM_AE_RTHR */
1715 + nla_total_size(4); /* XFRM_AE_ETHR */
1718 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1720 struct xfrm_aevent_id *id;
1721 struct nlmsghdr *nlh;
1724 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1728 id = nlmsg_data(nlh);
1729 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1730 id->sa_id.spi = x->id.spi;
1731 id->sa_id.family = x->props.family;
1732 id->sa_id.proto = x->id.proto;
1733 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1734 id->reqid = x->props.reqid;
1735 id->flags = c->data.aevent;
1737 if (x->replay_esn) {
1738 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1739 xfrm_replay_state_esn_len(x->replay_esn),
1742 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1747 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1751 if (id->flags & XFRM_AE_RTHR) {
1752 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1756 if (id->flags & XFRM_AE_ETHR) {
1757 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1758 x->replay_maxage * 10 / HZ);
1762 err = xfrm_mark_put(skb, &x->mark);
1766 return nlmsg_end(skb, nlh);
1769 nlmsg_cancel(skb, nlh);
1773 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1774 struct nlattr **attrs)
1776 struct net *net = sock_net(skb->sk);
1777 struct xfrm_state *x;
1778 struct sk_buff *r_skb;
1783 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1784 struct xfrm_usersa_id *id = &p->sa_id;
1786 mark = xfrm_mark_get(attrs, &m);
1788 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1792 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1793 if (r_skb == NULL) {
1799 * XXX: is this lock really needed - none of the other
1800 * gets lock (the concern is things getting updated
1801 * while we are still reading) - jhs
1803 spin_lock_bh(&x->lock);
1804 c.data.aevent = p->flags;
1805 c.seq = nlh->nlmsg_seq;
1806 c.pid = nlh->nlmsg_pid;
1808 if (build_aevent(r_skb, x, &c) < 0)
1810 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1811 spin_unlock_bh(&x->lock);
1816 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1817 struct nlattr **attrs)
1819 struct net *net = sock_net(skb->sk);
1820 struct xfrm_state *x;
1825 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1826 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1827 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1828 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1830 if (!lt && !rp && !re)
1833 /* pedantic mode - thou shalt sayeth replaceth */
1834 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1837 mark = xfrm_mark_get(attrs, &m);
1839 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1843 if (x->km.state != XFRM_STATE_VALID)
1846 err = xfrm_replay_verify_len(x->replay_esn, rp);
1850 spin_lock_bh(&x->lock);
1851 xfrm_update_ae_params(x, attrs);
1852 spin_unlock_bh(&x->lock);
1854 c.event = nlh->nlmsg_type;
1855 c.seq = nlh->nlmsg_seq;
1856 c.pid = nlh->nlmsg_pid;
1857 c.data.aevent = XFRM_AE_CU;
1858 km_state_notify(x, &c);
1865 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1866 struct nlattr **attrs)
1868 struct net *net = sock_net(skb->sk);
1870 u8 type = XFRM_POLICY_TYPE_MAIN;
1872 struct xfrm_audit audit_info;
1874 err = copy_from_user_policy_type(&type, attrs);
1878 audit_info.loginuid = audit_get_loginuid(current);
1879 audit_info.sessionid = audit_get_sessionid(current);
1880 security_task_getsecid(current, &audit_info.secid);
1881 err = xfrm_policy_flush(net, type, &audit_info);
1883 if (err == -ESRCH) /* empty table */
1889 c.event = nlh->nlmsg_type;
1890 c.seq = nlh->nlmsg_seq;
1891 c.pid = nlh->nlmsg_pid;
1893 km_policy_notify(NULL, 0, &c);
1897 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1898 struct nlattr **attrs)
1900 struct net *net = sock_net(skb->sk);
1901 struct xfrm_policy *xp;
1902 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1903 struct xfrm_userpolicy_info *p = &up->pol;
1904 u8 type = XFRM_POLICY_TYPE_MAIN;
1907 u32 mark = xfrm_mark_get(attrs, &m);
1909 err = copy_from_user_policy_type(&type, attrs);
1913 err = verify_policy_dir(p->dir);
1918 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1920 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1921 struct xfrm_sec_ctx *ctx;
1923 err = verify_sec_ctx_len(attrs);
1929 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1931 err = security_xfrm_policy_alloc(&ctx, uctx);
1935 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1936 &p->sel, ctx, 0, &err);
1937 security_xfrm_policy_free(ctx);
1942 if (unlikely(xp->walk.dead))
1947 uid_t loginuid = audit_get_loginuid(current);
1948 u32 sessionid = audit_get_sessionid(current);
1951 security_task_getsecid(current, &sid);
1952 xfrm_policy_delete(xp, p->dir);
1953 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1956 // reset the timers here?
1957 WARN(1, "Dont know what to do with soft policy expire\n");
1959 km_policy_expired(xp, p->dir, up->hard, current->pid);
1966 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1967 struct nlattr **attrs)
1969 struct net *net = sock_net(skb->sk);
1970 struct xfrm_state *x;
1972 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1973 struct xfrm_usersa_info *p = &ue->state;
1975 u32 mark = xfrm_mark_get(attrs, &m);
1977 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1983 spin_lock_bh(&x->lock);
1985 if (x->km.state != XFRM_STATE_VALID)
1987 km_state_expired(x, ue->hard, current->pid);
1990 uid_t loginuid = audit_get_loginuid(current);
1991 u32 sessionid = audit_get_sessionid(current);
1994 security_task_getsecid(current, &sid);
1995 __xfrm_state_delete(x);
1996 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
2000 spin_unlock_bh(&x->lock);
2005 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
2006 struct nlattr **attrs)
2008 struct net *net = sock_net(skb->sk);
2009 struct xfrm_policy *xp;
2010 struct xfrm_user_tmpl *ut;
2012 struct nlattr *rt = attrs[XFRMA_TMPL];
2013 struct xfrm_mark mark;
2015 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
2016 struct xfrm_state *x = xfrm_state_alloc(net);
2022 xfrm_mark_get(attrs, &mark);
2024 err = verify_newpolicy_info(&ua->policy);
2029 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2033 memcpy(&x->id, &ua->id, sizeof(ua->id));
2034 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2035 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2036 xp->mark.m = x->mark.m = mark.m;
2037 xp->mark.v = x->mark.v = mark.v;
2039 /* extract the templates and for each call km_key */
2040 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2041 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2042 memcpy(&x->id, &t->id, sizeof(x->id));
2043 x->props.mode = t->mode;
2044 x->props.reqid = t->reqid;
2045 x->props.family = ut->family;
2046 t->aalgos = ua->aalgos;
2047 t->ealgos = ua->ealgos;
2048 t->calgos = ua->calgos;
2049 err = km_query(x, t, xp);
2059 WARN(1, "BAD policy passed\n");
2066 #ifdef CONFIG_XFRM_MIGRATE
2067 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2068 struct xfrm_kmaddress *k,
2069 struct nlattr **attrs, int *num)
2071 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2072 struct xfrm_user_migrate *um;
2076 struct xfrm_user_kmaddress *uk;
2078 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2079 memcpy(&k->local, &uk->local, sizeof(k->local));
2080 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2081 k->family = uk->family;
2082 k->reserved = uk->reserved;
2086 num_migrate = nla_len(rt) / sizeof(*um);
2088 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2091 for (i = 0; i < num_migrate; i++, um++, ma++) {
2092 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2093 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2094 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2095 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2097 ma->proto = um->proto;
2098 ma->mode = um->mode;
2099 ma->reqid = um->reqid;
2101 ma->old_family = um->old_family;
2102 ma->new_family = um->new_family;
2109 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2110 struct nlattr **attrs)
2112 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2113 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2114 struct xfrm_kmaddress km, *kmp;
2119 if (attrs[XFRMA_MIGRATE] == NULL)
2122 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2124 err = copy_from_user_policy_type(&type, attrs);
2128 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2135 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
2140 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2141 struct nlattr **attrs)
2143 return -ENOPROTOOPT;
2147 #ifdef CONFIG_XFRM_MIGRATE
2148 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2150 struct xfrm_user_migrate um;
2152 memset(&um, 0, sizeof(um));
2153 um.proto = m->proto;
2155 um.reqid = m->reqid;
2156 um.old_family = m->old_family;
2157 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2158 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2159 um.new_family = m->new_family;
2160 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2161 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2163 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2166 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2168 struct xfrm_user_kmaddress uk;
2170 memset(&uk, 0, sizeof(uk));
2171 uk.family = k->family;
2172 uk.reserved = k->reserved;
2173 memcpy(&uk.local, &k->local, sizeof(uk.local));
2174 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2176 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2179 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2181 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2182 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2183 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2184 + userpolicy_type_attrsize();
2187 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2188 int num_migrate, const struct xfrm_kmaddress *k,
2189 const struct xfrm_selector *sel, u8 dir, u8 type)
2191 const struct xfrm_migrate *mp;
2192 struct xfrm_userpolicy_id *pol_id;
2193 struct nlmsghdr *nlh;
2196 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2200 pol_id = nlmsg_data(nlh);
2201 /* copy data from selector, dir, and type to the pol_id */
2202 memset(pol_id, 0, sizeof(*pol_id));
2203 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2207 err = copy_to_user_kmaddress(k, skb);
2211 err = copy_to_user_policy_type(type, skb);
2214 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2215 err = copy_to_user_migrate(mp, skb);
2220 return nlmsg_end(skb, nlh);
2223 nlmsg_cancel(skb, nlh);
2227 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2228 const struct xfrm_migrate *m, int num_migrate,
2229 const struct xfrm_kmaddress *k)
2231 struct net *net = &init_net;
2232 struct sk_buff *skb;
2234 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2239 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2242 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2245 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2246 const struct xfrm_migrate *m, int num_migrate,
2247 const struct xfrm_kmaddress *k)
2249 return -ENOPROTOOPT;
2253 #define XMSGSIZE(type) sizeof(struct type)
2255 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2256 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2257 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2258 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2259 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2260 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2261 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2262 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2263 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2264 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2265 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2266 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2267 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2268 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2269 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2270 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2271 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2272 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2273 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2274 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2275 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2280 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2281 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2282 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2283 [XFRMA_LASTUSED] = { .type = NLA_U64},
2284 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2285 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2286 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2287 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2288 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2289 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2290 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2291 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2292 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2293 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2294 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2295 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2296 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2297 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2298 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2299 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2300 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2301 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2302 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2303 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2306 static struct xfrm_link {
2307 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2308 int (*dump)(struct sk_buff *, struct netlink_callback *);
2309 int (*done)(struct netlink_callback *);
2310 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2311 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2312 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2313 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2314 .dump = xfrm_dump_sa,
2315 .done = xfrm_dump_sa_done },
2316 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2317 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2318 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2319 .dump = xfrm_dump_policy,
2320 .done = xfrm_dump_policy_done },
2321 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2322 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2323 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2324 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2325 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2326 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2327 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2328 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2329 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2330 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2331 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2332 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2333 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2336 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2338 struct net *net = sock_net(skb->sk);
2339 struct nlattr *attrs[XFRMA_MAX+1];
2340 struct xfrm_link *link;
2343 type = nlh->nlmsg_type;
2344 if (type > XFRM_MSG_MAX)
2347 type -= XFRM_MSG_BASE;
2348 link = &xfrm_dispatch[type];
2350 /* All operations require privileges, even GET */
2351 if (!capable(CAP_NET_ADMIN))
2354 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2355 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2356 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2357 if (link->dump == NULL)
2361 struct netlink_dump_control c = {
2365 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2369 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2374 if (link->doit == NULL)
2377 return link->doit(skb, nlh, attrs);
2380 static void xfrm_netlink_rcv(struct sk_buff *skb)
2382 mutex_lock(&xfrm_cfg_mutex);
2383 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2384 mutex_unlock(&xfrm_cfg_mutex);
2387 static inline size_t xfrm_expire_msgsize(void)
2389 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2390 + nla_total_size(sizeof(struct xfrm_mark));
2393 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2395 struct xfrm_user_expire *ue;
2396 struct nlmsghdr *nlh;
2399 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2403 ue = nlmsg_data(nlh);
2404 copy_to_user_state(x, &ue->state);
2405 ue->hard = (c->data.hard != 0) ? 1 : 0;
2407 err = xfrm_mark_put(skb, &x->mark);
2411 return nlmsg_end(skb, nlh);
2414 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2416 struct net *net = xs_net(x);
2417 struct sk_buff *skb;
2419 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2423 if (build_expire(skb, x, c) < 0) {
2428 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2431 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2433 struct net *net = xs_net(x);
2434 struct sk_buff *skb;
2436 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2440 if (build_aevent(skb, x, c) < 0)
2443 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2446 static int xfrm_notify_sa_flush(const struct km_event *c)
2448 struct net *net = c->net;
2449 struct xfrm_usersa_flush *p;
2450 struct nlmsghdr *nlh;
2451 struct sk_buff *skb;
2452 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2454 skb = nlmsg_new(len, GFP_ATOMIC);
2458 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2464 p = nlmsg_data(nlh);
2465 p->proto = c->data.proto;
2467 nlmsg_end(skb, nlh);
2469 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2472 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2476 l += nla_total_size(aead_len(x->aead));
2478 l += nla_total_size(sizeof(struct xfrm_algo) +
2479 (x->aalg->alg_key_len + 7) / 8);
2480 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2483 l += nla_total_size(xfrm_alg_len(x->ealg));
2485 l += nla_total_size(sizeof(*x->calg));
2487 l += nla_total_size(sizeof(*x->encap));
2489 l += nla_total_size(sizeof(x->tfcpad));
2491 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2493 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2494 x->security->ctx_len);
2496 l += nla_total_size(sizeof(*x->coaddr));
2498 /* Must count x->lastused as it may become non-zero behind our back. */
2499 l += nla_total_size(sizeof(u64));
2504 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2506 struct net *net = xs_net(x);
2507 struct xfrm_usersa_info *p;
2508 struct xfrm_usersa_id *id;
2509 struct nlmsghdr *nlh;
2510 struct sk_buff *skb;
2511 int len = xfrm_sa_len(x);
2514 headlen = sizeof(*p);
2515 if (c->event == XFRM_MSG_DELSA) {
2516 len += nla_total_size(headlen);
2517 headlen = sizeof(*id);
2518 len += nla_total_size(sizeof(struct xfrm_mark));
2520 len += NLMSG_ALIGN(headlen);
2522 skb = nlmsg_new(len, GFP_ATOMIC);
2526 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2531 p = nlmsg_data(nlh);
2532 if (c->event == XFRM_MSG_DELSA) {
2533 struct nlattr *attr;
2535 id = nlmsg_data(nlh);
2536 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2537 id->spi = x->id.spi;
2538 id->family = x->props.family;
2539 id->proto = x->id.proto;
2541 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2548 err = copy_to_user_state_extra(x, p, skb);
2552 nlmsg_end(skb, nlh);
2554 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2561 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2565 case XFRM_MSG_EXPIRE:
2566 return xfrm_exp_state_notify(x, c);
2567 case XFRM_MSG_NEWAE:
2568 return xfrm_aevent_state_notify(x, c);
2569 case XFRM_MSG_DELSA:
2570 case XFRM_MSG_UPDSA:
2571 case XFRM_MSG_NEWSA:
2572 return xfrm_notify_sa(x, c);
2573 case XFRM_MSG_FLUSHSA:
2574 return xfrm_notify_sa_flush(c);
2576 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2585 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2586 struct xfrm_policy *xp)
2588 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2589 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2590 + nla_total_size(sizeof(struct xfrm_mark))
2591 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2592 + userpolicy_type_attrsize();
2595 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2596 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2599 __u32 seq = xfrm_get_acqseq();
2600 struct xfrm_user_acquire *ua;
2601 struct nlmsghdr *nlh;
2604 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2608 ua = nlmsg_data(nlh);
2609 memcpy(&ua->id, &x->id, sizeof(ua->id));
2610 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2611 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2612 copy_to_user_policy(xp, &ua->policy, dir);
2613 ua->aalgos = xt->aalgos;
2614 ua->ealgos = xt->ealgos;
2615 ua->calgos = xt->calgos;
2616 ua->seq = x->km.seq = seq;
2618 err = copy_to_user_tmpl(xp, skb);
2620 err = copy_to_user_state_sec_ctx(x, skb);
2622 err = copy_to_user_policy_type(xp->type, skb);
2624 err = xfrm_mark_put(skb, &xp->mark);
2626 nlmsg_cancel(skb, nlh);
2630 return nlmsg_end(skb, nlh);
2633 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2634 struct xfrm_policy *xp, int dir)
2636 struct net *net = xs_net(x);
2637 struct sk_buff *skb;
2639 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2643 if (build_acquire(skb, x, xt, xp, dir) < 0)
2646 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2649 /* User gives us xfrm_user_policy_info followed by an array of 0
2650 * or more templates.
2652 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2653 u8 *data, int len, int *dir)
2655 struct net *net = sock_net(sk);
2656 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2657 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2658 struct xfrm_policy *xp;
2661 switch (sk->sk_family) {
2663 if (opt != IP_XFRM_POLICY) {
2668 #if IS_ENABLED(CONFIG_IPV6)
2670 if (opt != IPV6_XFRM_POLICY) {
2683 if (len < sizeof(*p) ||
2684 verify_newpolicy_info(p))
2687 nr = ((len - sizeof(*p)) / sizeof(*ut));
2688 if (validate_tmpl(nr, ut, p->sel.family))
2691 if (p->dir > XFRM_POLICY_OUT)
2694 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2700 copy_from_user_policy(xp, p);
2701 xp->type = XFRM_POLICY_TYPE_MAIN;
2702 copy_templates(xp, ut, nr);
2709 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2711 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2712 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2713 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2714 + nla_total_size(sizeof(struct xfrm_mark))
2715 + userpolicy_type_attrsize();
2718 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2719 int dir, const struct km_event *c)
2721 struct xfrm_user_polexpire *upe;
2722 int hard = c->data.hard;
2723 struct nlmsghdr *nlh;
2726 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2730 upe = nlmsg_data(nlh);
2731 copy_to_user_policy(xp, &upe->pol, dir);
2732 err = copy_to_user_tmpl(xp, skb);
2734 err = copy_to_user_sec_ctx(xp, skb);
2736 err = copy_to_user_policy_type(xp->type, skb);
2738 err = xfrm_mark_put(skb, &xp->mark);
2740 nlmsg_cancel(skb, nlh);
2745 return nlmsg_end(skb, nlh);
2748 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2750 struct net *net = xp_net(xp);
2751 struct sk_buff *skb;
2753 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2757 if (build_polexpire(skb, xp, dir, c) < 0)
2760 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2763 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2765 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2766 struct net *net = xp_net(xp);
2767 struct xfrm_userpolicy_info *p;
2768 struct xfrm_userpolicy_id *id;
2769 struct nlmsghdr *nlh;
2770 struct sk_buff *skb;
2773 headlen = sizeof(*p);
2774 if (c->event == XFRM_MSG_DELPOLICY) {
2775 len += nla_total_size(headlen);
2776 headlen = sizeof(*id);
2778 len += userpolicy_type_attrsize();
2779 len += nla_total_size(sizeof(struct xfrm_mark));
2780 len += NLMSG_ALIGN(headlen);
2782 skb = nlmsg_new(len, GFP_ATOMIC);
2786 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2791 p = nlmsg_data(nlh);
2792 if (c->event == XFRM_MSG_DELPOLICY) {
2793 struct nlattr *attr;
2795 id = nlmsg_data(nlh);
2796 memset(id, 0, sizeof(*id));
2799 id->index = xp->index;
2801 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2803 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2811 copy_to_user_policy(xp, p, dir);
2812 err = copy_to_user_tmpl(xp, skb);
2814 err = copy_to_user_policy_type(xp->type, skb);
2816 err = xfrm_mark_put(skb, &xp->mark);
2820 nlmsg_end(skb, nlh);
2822 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2829 static int xfrm_notify_policy_flush(const struct km_event *c)
2831 struct net *net = c->net;
2832 struct nlmsghdr *nlh;
2833 struct sk_buff *skb;
2836 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2840 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2844 err = copy_to_user_policy_type(c->data.type, skb);
2848 nlmsg_end(skb, nlh);
2850 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2857 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2861 case XFRM_MSG_NEWPOLICY:
2862 case XFRM_MSG_UPDPOLICY:
2863 case XFRM_MSG_DELPOLICY:
2864 return xfrm_notify_policy(xp, dir, c);
2865 case XFRM_MSG_FLUSHPOLICY:
2866 return xfrm_notify_policy_flush(c);
2867 case XFRM_MSG_POLEXPIRE:
2868 return xfrm_exp_policy_notify(xp, dir, c);
2870 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2878 static inline size_t xfrm_report_msgsize(void)
2880 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2883 static int build_report(struct sk_buff *skb, u8 proto,
2884 struct xfrm_selector *sel, xfrm_address_t *addr)
2886 struct xfrm_user_report *ur;
2887 struct nlmsghdr *nlh;
2889 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2893 ur = nlmsg_data(nlh);
2895 memcpy(&ur->sel, sel, sizeof(ur->sel));
2898 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2900 nlmsg_cancel(skb, nlh);
2904 return nlmsg_end(skb, nlh);
2907 static int xfrm_send_report(struct net *net, u8 proto,
2908 struct xfrm_selector *sel, xfrm_address_t *addr)
2910 struct sk_buff *skb;
2912 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2916 if (build_report(skb, proto, sel, addr) < 0)
2919 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2922 static inline size_t xfrm_mapping_msgsize(void)
2924 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2927 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2928 xfrm_address_t *new_saddr, __be16 new_sport)
2930 struct xfrm_user_mapping *um;
2931 struct nlmsghdr *nlh;
2933 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2937 um = nlmsg_data(nlh);
2939 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2940 um->id.spi = x->id.spi;
2941 um->id.family = x->props.family;
2942 um->id.proto = x->id.proto;
2943 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2944 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2945 um->new_sport = new_sport;
2946 um->old_sport = x->encap->encap_sport;
2947 um->reqid = x->props.reqid;
2949 return nlmsg_end(skb, nlh);
2952 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2955 struct net *net = xs_net(x);
2956 struct sk_buff *skb;
2958 if (x->id.proto != IPPROTO_ESP)
2964 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2968 if (build_mapping(skb, x, ipaddr, sport) < 0)
2971 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2974 static struct xfrm_mgr netlink_mgr = {
2976 .notify = xfrm_send_state_notify,
2977 .acquire = xfrm_send_acquire,
2978 .compile_policy = xfrm_compile_policy,
2979 .notify_policy = xfrm_send_policy_notify,
2980 .report = xfrm_send_report,
2981 .migrate = xfrm_send_migrate,
2982 .new_mapping = xfrm_send_mapping,
2985 static int __net_init xfrm_user_net_init(struct net *net)
2988 struct netlink_kernel_cfg cfg = {
2989 .groups = XFRMNLGRP_MAX,
2990 .input = xfrm_netlink_rcv,
2993 nlsk = netlink_kernel_create(net, NETLINK_XFRM, THIS_MODULE, &cfg);
2996 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2997 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
3001 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
3004 list_for_each_entry(net, net_exit_list, exit_list)
3005 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3007 list_for_each_entry(net, net_exit_list, exit_list)
3008 netlink_kernel_release(net->xfrm.nlsk_stash);
3011 static struct pernet_operations xfrm_user_net_ops = {
3012 .init = xfrm_user_net_init,
3013 .exit_batch = xfrm_user_net_exit,
3016 static int __init xfrm_user_init(void)
3020 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3022 rv = register_pernet_subsys(&xfrm_user_net_ops);
3025 rv = xfrm_register_km(&netlink_mgr);
3027 unregister_pernet_subsys(&xfrm_user_net_ops);
3031 static void __exit xfrm_user_exit(void)
3033 xfrm_unregister_km(&netlink_mgr);
3034 unregister_pernet_subsys(&xfrm_user_net_ops);
3037 module_init(xfrm_user_init);
3038 module_exit(xfrm_user_exit);
3039 MODULE_LICENSE("GPL");
3040 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);