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 defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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 defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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 defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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,
467 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
468 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
469 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
470 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
471 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
474 struct xfrm_replay_state_esn *replay_esn;
475 replay_esn = nla_data(re);
476 memcpy(x->replay_esn, replay_esn,
477 xfrm_replay_state_esn_len(replay_esn));
478 memcpy(x->preplay_esn, replay_esn,
479 xfrm_replay_state_esn_len(replay_esn));
483 struct xfrm_replay_state *replay;
484 replay = nla_data(rp);
485 memcpy(&x->replay, replay, sizeof(*replay));
486 memcpy(&x->preplay, replay, sizeof(*replay));
490 struct xfrm_lifetime_cur *ltime;
491 ltime = nla_data(lt);
492 x->curlft.bytes = ltime->bytes;
493 x->curlft.packets = ltime->packets;
494 x->curlft.add_time = ltime->add_time;
495 x->curlft.use_time = ltime->use_time;
499 x->replay_maxage = nla_get_u32(et);
502 x->replay_maxdiff = nla_get_u32(rt);
505 static struct xfrm_state *xfrm_state_construct(struct net *net,
506 struct xfrm_usersa_info *p,
507 struct nlattr **attrs,
510 struct xfrm_state *x = xfrm_state_alloc(net);
516 copy_from_user_state(x, p);
518 if ((err = attach_aead(&x->aead, &x->props.ealgo,
519 attrs[XFRMA_ALG_AEAD])))
521 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
522 attrs[XFRMA_ALG_AUTH_TRUNC])))
524 if (!x->props.aalgo) {
525 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
526 attrs[XFRMA_ALG_AUTH])))
529 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
530 xfrm_ealg_get_byname,
531 attrs[XFRMA_ALG_CRYPT])))
533 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
534 xfrm_calg_get_byname,
535 attrs[XFRMA_ALG_COMP])))
538 if (attrs[XFRMA_ENCAP]) {
539 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
540 sizeof(*x->encap), GFP_KERNEL);
541 if (x->encap == NULL)
545 if (attrs[XFRMA_TFCPAD])
546 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
548 if (attrs[XFRMA_COADDR]) {
549 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
550 sizeof(*x->coaddr), GFP_KERNEL);
551 if (x->coaddr == NULL)
555 xfrm_mark_get(attrs, &x->mark);
557 err = __xfrm_init_state(x, false);
561 if (attrs[XFRMA_SEC_CTX] &&
562 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
565 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
566 attrs[XFRMA_REPLAY_ESN_VAL])))
570 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
571 /* sysctl_xfrm_aevent_etime is in 100ms units */
572 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
574 if ((err = xfrm_init_replay(x)))
577 /* override default values from above */
578 xfrm_update_ae_params(x, attrs, 0);
583 x->km.state = XFRM_STATE_DEAD;
590 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
591 struct nlattr **attrs)
593 struct net *net = sock_net(skb->sk);
594 struct xfrm_usersa_info *p = nlmsg_data(nlh);
595 struct xfrm_state *x;
598 uid_t loginuid = audit_get_loginuid(current);
599 u32 sessionid = audit_get_sessionid(current);
602 err = verify_newsa_info(p, attrs);
606 x = xfrm_state_construct(net, p, attrs, &err);
611 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
612 err = xfrm_state_add(x);
614 err = xfrm_state_update(x);
616 security_task_getsecid(current, &sid);
617 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
620 x->km.state = XFRM_STATE_DEAD;
625 c.seq = nlh->nlmsg_seq;
626 c.pid = nlh->nlmsg_pid;
627 c.event = nlh->nlmsg_type;
629 km_state_notify(x, &c);
635 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
636 struct xfrm_usersa_id *p,
637 struct nlattr **attrs,
640 struct xfrm_state *x = NULL;
643 u32 mark = xfrm_mark_get(attrs, &m);
645 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
647 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
649 xfrm_address_t *saddr = NULL;
651 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
658 x = xfrm_state_lookup_byaddr(net, mark,
660 p->proto, p->family);
669 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
670 struct nlattr **attrs)
672 struct net *net = sock_net(skb->sk);
673 struct xfrm_state *x;
676 struct xfrm_usersa_id *p = nlmsg_data(nlh);
677 uid_t loginuid = audit_get_loginuid(current);
678 u32 sessionid = audit_get_sessionid(current);
681 x = xfrm_user_state_lookup(net, p, attrs, &err);
685 if ((err = security_xfrm_state_delete(x)) != 0)
688 if (xfrm_state_kern(x)) {
693 err = xfrm_state_delete(x);
698 c.seq = nlh->nlmsg_seq;
699 c.pid = nlh->nlmsg_pid;
700 c.event = nlh->nlmsg_type;
701 km_state_notify(x, &c);
704 security_task_getsecid(current, &sid);
705 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
710 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
712 memset(p, 0, sizeof(*p));
713 memcpy(&p->id, &x->id, sizeof(p->id));
714 memcpy(&p->sel, &x->sel, sizeof(p->sel));
715 memcpy(&p->lft, &x->lft, sizeof(p->lft));
716 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
717 memcpy(&p->stats, &x->stats, sizeof(p->stats));
718 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
719 p->mode = x->props.mode;
720 p->replay_window = x->props.replay_window;
721 p->reqid = x->props.reqid;
722 p->family = x->props.family;
723 p->flags = x->props.flags;
727 struct xfrm_dump_info {
728 struct sk_buff *in_skb;
729 struct sk_buff *out_skb;
734 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
736 struct xfrm_user_sec_ctx *uctx;
738 int ctx_size = sizeof(*uctx) + s->ctx_len;
740 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
744 uctx = nla_data(attr);
745 uctx->exttype = XFRMA_SEC_CTX;
746 uctx->len = ctx_size;
747 uctx->ctx_doi = s->ctx_doi;
748 uctx->ctx_alg = s->ctx_alg;
749 uctx->ctx_len = s->ctx_len;
750 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
755 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
757 struct xfrm_algo *algo;
760 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
761 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
765 algo = nla_data(nla);
766 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
767 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
768 algo->alg_key_len = auth->alg_key_len;
773 /* Don't change this without updating xfrm_sa_len! */
774 static int copy_to_user_state_extra(struct xfrm_state *x,
775 struct xfrm_usersa_info *p,
778 copy_to_user_state(x, p);
781 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
784 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
787 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
789 if (copy_to_user_auth(x->aalg, skb))
790 goto nla_put_failure;
792 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
793 xfrm_alg_auth_len(x->aalg), x->aalg);
796 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
798 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
801 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
804 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
806 if (xfrm_mark_put(skb, &x->mark))
807 goto nla_put_failure;
810 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
811 xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
813 if (x->security && copy_sec_ctx(x->security, skb) < 0)
814 goto nla_put_failure;
822 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
824 struct xfrm_dump_info *sp = ptr;
825 struct sk_buff *in_skb = sp->in_skb;
826 struct sk_buff *skb = sp->out_skb;
827 struct xfrm_usersa_info *p;
828 struct nlmsghdr *nlh;
831 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
832 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
838 err = copy_to_user_state_extra(x, p, skb);
840 goto nla_put_failure;
846 nlmsg_cancel(skb, nlh);
850 static int xfrm_dump_sa_done(struct netlink_callback *cb)
852 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
853 xfrm_state_walk_done(walk);
857 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
859 struct net *net = sock_net(skb->sk);
860 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
861 struct xfrm_dump_info info;
863 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
864 sizeof(cb->args) - sizeof(cb->args[0]));
866 info.in_skb = cb->skb;
868 info.nlmsg_seq = cb->nlh->nlmsg_seq;
869 info.nlmsg_flags = NLM_F_MULTI;
873 xfrm_state_walk_init(walk, 0);
876 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
881 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
882 struct xfrm_state *x, u32 seq)
884 struct xfrm_dump_info info;
888 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
890 return ERR_PTR(-ENOMEM);
892 info.in_skb = in_skb;
894 info.nlmsg_seq = seq;
895 info.nlmsg_flags = 0;
897 err = dump_one_state(x, 0, &info);
906 static inline size_t xfrm_spdinfo_msgsize(void)
908 return NLMSG_ALIGN(4)
909 + nla_total_size(sizeof(struct xfrmu_spdinfo))
910 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
913 static int build_spdinfo(struct sk_buff *skb, struct net *net,
914 u32 pid, u32 seq, u32 flags)
916 struct xfrmk_spdinfo si;
917 struct xfrmu_spdinfo spc;
918 struct xfrmu_spdhinfo sph;
919 struct nlmsghdr *nlh;
922 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
923 if (nlh == NULL) /* shouldn't really happen ... */
928 xfrm_spd_getinfo(net, &si);
929 spc.incnt = si.incnt;
930 spc.outcnt = si.outcnt;
931 spc.fwdcnt = si.fwdcnt;
932 spc.inscnt = si.inscnt;
933 spc.outscnt = si.outscnt;
934 spc.fwdscnt = si.fwdscnt;
935 sph.spdhcnt = si.spdhcnt;
936 sph.spdhmcnt = si.spdhmcnt;
938 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
939 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
941 return nlmsg_end(skb, nlh);
944 nlmsg_cancel(skb, nlh);
948 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
949 struct nlattr **attrs)
951 struct net *net = sock_net(skb->sk);
952 struct sk_buff *r_skb;
953 u32 *flags = nlmsg_data(nlh);
954 u32 spid = NETLINK_CB(skb).pid;
955 u32 seq = nlh->nlmsg_seq;
957 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
961 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
964 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
967 static inline size_t xfrm_sadinfo_msgsize(void)
969 return NLMSG_ALIGN(4)
970 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
971 + nla_total_size(4); /* XFRMA_SAD_CNT */
974 static int build_sadinfo(struct sk_buff *skb, struct net *net,
975 u32 pid, u32 seq, u32 flags)
977 struct xfrmk_sadinfo si;
978 struct xfrmu_sadhinfo sh;
979 struct nlmsghdr *nlh;
982 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
983 if (nlh == NULL) /* shouldn't really happen ... */
988 xfrm_sad_getinfo(net, &si);
990 sh.sadhmcnt = si.sadhmcnt;
991 sh.sadhcnt = si.sadhcnt;
993 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
994 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
996 return nlmsg_end(skb, nlh);
999 nlmsg_cancel(skb, nlh);
1003 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1004 struct nlattr **attrs)
1006 struct net *net = sock_net(skb->sk);
1007 struct sk_buff *r_skb;
1008 u32 *flags = nlmsg_data(nlh);
1009 u32 spid = NETLINK_CB(skb).pid;
1010 u32 seq = nlh->nlmsg_seq;
1012 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
1016 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
1019 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
1022 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1023 struct nlattr **attrs)
1025 struct net *net = sock_net(skb->sk);
1026 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1027 struct xfrm_state *x;
1028 struct sk_buff *resp_skb;
1031 x = xfrm_user_state_lookup(net, p, attrs, &err);
1035 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1036 if (IS_ERR(resp_skb)) {
1037 err = PTR_ERR(resp_skb);
1039 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1046 static int verify_userspi_info(struct xfrm_userspi_info *p)
1048 switch (p->info.id.proto) {
1054 /* IPCOMP spi is 16-bits. */
1055 if (p->max >= 0x10000)
1063 if (p->min > p->max)
1069 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
1070 struct nlattr **attrs)
1072 struct net *net = sock_net(skb->sk);
1073 struct xfrm_state *x;
1074 struct xfrm_userspi_info *p;
1075 struct sk_buff *resp_skb;
1076 xfrm_address_t *daddr;
1082 p = nlmsg_data(nlh);
1083 err = verify_userspi_info(p);
1087 family = p->info.family;
1088 daddr = &p->info.id.daddr;
1092 mark = xfrm_mark_get(attrs, &m);
1094 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1095 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1102 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1103 p->info.id.proto, daddr,
1110 err = xfrm_alloc_spi(x, p->min, p->max);
1114 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1115 if (IS_ERR(resp_skb)) {
1116 err = PTR_ERR(resp_skb);
1120 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1128 static int verify_policy_dir(u8 dir)
1131 case XFRM_POLICY_IN:
1132 case XFRM_POLICY_OUT:
1133 case XFRM_POLICY_FWD:
1143 static int verify_policy_type(u8 type)
1146 case XFRM_POLICY_TYPE_MAIN:
1147 #ifdef CONFIG_XFRM_SUB_POLICY
1148 case XFRM_POLICY_TYPE_SUB:
1159 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1162 case XFRM_SHARE_ANY:
1163 case XFRM_SHARE_SESSION:
1164 case XFRM_SHARE_USER:
1165 case XFRM_SHARE_UNIQUE:
1172 switch (p->action) {
1173 case XFRM_POLICY_ALLOW:
1174 case XFRM_POLICY_BLOCK:
1181 switch (p->sel.family) {
1186 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1189 return -EAFNOSUPPORT;
1196 return verify_policy_dir(p->dir);
1199 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1201 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1202 struct xfrm_user_sec_ctx *uctx;
1207 uctx = nla_data(rt);
1208 return security_xfrm_policy_alloc(&pol->security, uctx);
1211 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1217 for (i = 0; i < nr; i++, ut++) {
1218 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1220 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1221 memcpy(&t->saddr, &ut->saddr,
1222 sizeof(xfrm_address_t));
1223 t->reqid = ut->reqid;
1225 t->share = ut->share;
1226 t->optional = ut->optional;
1227 t->aalgos = ut->aalgos;
1228 t->ealgos = ut->ealgos;
1229 t->calgos = ut->calgos;
1230 /* If all masks are ~0, then we allow all algorithms. */
1231 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1232 t->encap_family = ut->family;
1236 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1240 if (nr > XFRM_MAX_DEPTH)
1243 for (i = 0; i < nr; i++) {
1244 /* We never validated the ut->family value, so many
1245 * applications simply leave it at zero. The check was
1246 * never made and ut->family was ignored because all
1247 * templates could be assumed to have the same family as
1248 * the policy itself. Now that we will have ipv4-in-ipv6
1249 * and ipv6-in-ipv4 tunnels, this is no longer true.
1252 ut[i].family = family;
1254 switch (ut[i].family) {
1257 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1269 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1271 struct nlattr *rt = attrs[XFRMA_TMPL];
1276 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1277 int nr = nla_len(rt) / sizeof(*utmpl);
1280 err = validate_tmpl(nr, utmpl, pol->family);
1284 copy_templates(pol, utmpl, nr);
1289 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1291 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1292 struct xfrm_userpolicy_type *upt;
1293 u8 type = XFRM_POLICY_TYPE_MAIN;
1301 err = verify_policy_type(type);
1309 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1311 xp->priority = p->priority;
1312 xp->index = p->index;
1313 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1314 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1315 xp->action = p->action;
1316 xp->flags = p->flags;
1317 xp->family = p->sel.family;
1318 /* XXX xp->share = p->share; */
1321 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1323 memset(p, 0, sizeof(*p));
1324 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1325 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1326 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1327 p->priority = xp->priority;
1328 p->index = xp->index;
1329 p->sel.family = xp->family;
1331 p->action = xp->action;
1332 p->flags = xp->flags;
1333 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1336 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1338 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1346 copy_from_user_policy(xp, p);
1348 err = copy_from_user_policy_type(&xp->type, attrs);
1352 if (!(err = copy_from_user_tmpl(xp, attrs)))
1353 err = copy_from_user_sec_ctx(xp, attrs);
1357 xfrm_mark_get(attrs, &xp->mark);
1363 xfrm_policy_destroy(xp);
1367 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1368 struct nlattr **attrs)
1370 struct net *net = sock_net(skb->sk);
1371 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1372 struct xfrm_policy *xp;
1376 uid_t loginuid = audit_get_loginuid(current);
1377 u32 sessionid = audit_get_sessionid(current);
1380 err = verify_newpolicy_info(p);
1383 err = verify_sec_ctx_len(attrs);
1387 xp = xfrm_policy_construct(net, p, attrs, &err);
1391 /* shouldn't excl be based on nlh flags??
1392 * Aha! this is anti-netlink really i.e more pfkey derived
1393 * in netlink excl is a flag and you wouldnt need
1394 * a type XFRM_MSG_UPDPOLICY - JHS */
1395 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1396 err = xfrm_policy_insert(p->dir, xp, excl);
1397 security_task_getsecid(current, &sid);
1398 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1401 security_xfrm_policy_free(xp->security);
1406 c.event = nlh->nlmsg_type;
1407 c.seq = nlh->nlmsg_seq;
1408 c.pid = nlh->nlmsg_pid;
1409 km_policy_notify(xp, p->dir, &c);
1416 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1418 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1421 if (xp->xfrm_nr == 0)
1424 for (i = 0; i < xp->xfrm_nr; i++) {
1425 struct xfrm_user_tmpl *up = &vec[i];
1426 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1428 memset(up, 0, sizeof(*up));
1429 memcpy(&up->id, &kp->id, sizeof(up->id));
1430 up->family = kp->encap_family;
1431 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1432 up->reqid = kp->reqid;
1433 up->mode = kp->mode;
1434 up->share = kp->share;
1435 up->optional = kp->optional;
1436 up->aalgos = kp->aalgos;
1437 up->ealgos = kp->ealgos;
1438 up->calgos = kp->calgos;
1441 return nla_put(skb, XFRMA_TMPL,
1442 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1445 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1448 return copy_sec_ctx(x->security, skb);
1453 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1456 return copy_sec_ctx(xp->security, skb);
1460 static inline size_t userpolicy_type_attrsize(void)
1462 #ifdef CONFIG_XFRM_SUB_POLICY
1463 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1469 #ifdef CONFIG_XFRM_SUB_POLICY
1470 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1472 struct xfrm_userpolicy_type upt = {
1476 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1480 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1486 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1488 struct xfrm_dump_info *sp = ptr;
1489 struct xfrm_userpolicy_info *p;
1490 struct sk_buff *in_skb = sp->in_skb;
1491 struct sk_buff *skb = sp->out_skb;
1492 struct nlmsghdr *nlh;
1494 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1495 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1499 p = nlmsg_data(nlh);
1500 copy_to_user_policy(xp, p, dir);
1501 if (copy_to_user_tmpl(xp, skb) < 0)
1503 if (copy_to_user_sec_ctx(xp, skb))
1505 if (copy_to_user_policy_type(xp->type, skb) < 0)
1507 if (xfrm_mark_put(skb, &xp->mark))
1508 goto nla_put_failure;
1510 nlmsg_end(skb, nlh);
1515 nlmsg_cancel(skb, nlh);
1519 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1521 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1523 xfrm_policy_walk_done(walk);
1527 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1529 struct net *net = sock_net(skb->sk);
1530 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1531 struct xfrm_dump_info info;
1533 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1534 sizeof(cb->args) - sizeof(cb->args[0]));
1536 info.in_skb = cb->skb;
1538 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1539 info.nlmsg_flags = NLM_F_MULTI;
1543 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1546 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1551 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1552 struct xfrm_policy *xp,
1555 struct xfrm_dump_info info;
1556 struct sk_buff *skb;
1559 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1561 return ERR_PTR(-ENOMEM);
1563 info.in_skb = in_skb;
1565 info.nlmsg_seq = seq;
1566 info.nlmsg_flags = 0;
1568 err = dump_one_policy(xp, dir, 0, &info);
1571 return ERR_PTR(err);
1577 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1578 struct nlattr **attrs)
1580 struct net *net = sock_net(skb->sk);
1581 struct xfrm_policy *xp;
1582 struct xfrm_userpolicy_id *p;
1583 u8 type = XFRM_POLICY_TYPE_MAIN;
1588 u32 mark = xfrm_mark_get(attrs, &m);
1590 p = nlmsg_data(nlh);
1591 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1593 err = copy_from_user_policy_type(&type, attrs);
1597 err = verify_policy_dir(p->dir);
1602 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1604 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1605 struct xfrm_sec_ctx *ctx;
1607 err = verify_sec_ctx_len(attrs);
1613 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1615 err = security_xfrm_policy_alloc(&ctx, uctx);
1619 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1621 security_xfrm_policy_free(ctx);
1627 struct sk_buff *resp_skb;
1629 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1630 if (IS_ERR(resp_skb)) {
1631 err = PTR_ERR(resp_skb);
1633 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1634 NETLINK_CB(skb).pid);
1637 uid_t loginuid = audit_get_loginuid(current);
1638 u32 sessionid = audit_get_sessionid(current);
1641 security_task_getsecid(current, &sid);
1642 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1648 c.data.byid = p->index;
1649 c.event = nlh->nlmsg_type;
1650 c.seq = nlh->nlmsg_seq;
1651 c.pid = nlh->nlmsg_pid;
1652 km_policy_notify(xp, p->dir, &c);
1660 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1661 struct nlattr **attrs)
1663 struct net *net = sock_net(skb->sk);
1665 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1666 struct xfrm_audit audit_info;
1669 audit_info.loginuid = audit_get_loginuid(current);
1670 audit_info.sessionid = audit_get_sessionid(current);
1671 security_task_getsecid(current, &audit_info.secid);
1672 err = xfrm_state_flush(net, p->proto, &audit_info);
1674 if (err == -ESRCH) /* empty table */
1678 c.data.proto = p->proto;
1679 c.event = nlh->nlmsg_type;
1680 c.seq = nlh->nlmsg_seq;
1681 c.pid = nlh->nlmsg_pid;
1683 km_state_notify(NULL, &c);
1688 static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
1690 size_t replay_size = x->replay_esn ?
1691 xfrm_replay_state_esn_len(x->replay_esn) :
1692 sizeof(struct xfrm_replay_state);
1694 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1695 + nla_total_size(replay_size)
1696 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1697 + nla_total_size(sizeof(struct xfrm_mark))
1698 + nla_total_size(4) /* XFRM_AE_RTHR */
1699 + nla_total_size(4); /* XFRM_AE_ETHR */
1702 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1704 struct xfrm_aevent_id *id;
1705 struct nlmsghdr *nlh;
1707 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1711 id = nlmsg_data(nlh);
1712 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1713 id->sa_id.spi = x->id.spi;
1714 id->sa_id.family = x->props.family;
1715 id->sa_id.proto = x->id.proto;
1716 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1717 id->reqid = x->props.reqid;
1718 id->flags = c->data.aevent;
1721 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
1722 xfrm_replay_state_esn_len(x->replay_esn),
1725 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1727 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1729 if (id->flags & XFRM_AE_RTHR)
1730 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1732 if (id->flags & XFRM_AE_ETHR)
1733 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1734 x->replay_maxage * 10 / HZ);
1736 if (xfrm_mark_put(skb, &x->mark))
1737 goto nla_put_failure;
1739 return nlmsg_end(skb, nlh);
1742 nlmsg_cancel(skb, nlh);
1746 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1747 struct nlattr **attrs)
1749 struct net *net = sock_net(skb->sk);
1750 struct xfrm_state *x;
1751 struct sk_buff *r_skb;
1756 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1757 struct xfrm_usersa_id *id = &p->sa_id;
1759 mark = xfrm_mark_get(attrs, &m);
1761 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1765 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1766 if (r_skb == NULL) {
1772 * XXX: is this lock really needed - none of the other
1773 * gets lock (the concern is things getting updated
1774 * while we are still reading) - jhs
1776 spin_lock_bh(&x->lock);
1777 c.data.aevent = p->flags;
1778 c.seq = nlh->nlmsg_seq;
1779 c.pid = nlh->nlmsg_pid;
1781 if (build_aevent(r_skb, x, &c) < 0)
1783 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1784 spin_unlock_bh(&x->lock);
1789 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1790 struct nlattr **attrs)
1792 struct net *net = sock_net(skb->sk);
1793 struct xfrm_state *x;
1798 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1799 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1800 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
1801 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1803 if (!lt && !rp && !re)
1806 /* pedantic mode - thou shalt sayeth replaceth */
1807 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1810 mark = xfrm_mark_get(attrs, &m);
1812 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1816 if (x->km.state != XFRM_STATE_VALID)
1819 err = xfrm_replay_verify_len(x->replay_esn, rp);
1823 spin_lock_bh(&x->lock);
1824 xfrm_update_ae_params(x, attrs, 1);
1825 spin_unlock_bh(&x->lock);
1827 c.event = nlh->nlmsg_type;
1828 c.seq = nlh->nlmsg_seq;
1829 c.pid = nlh->nlmsg_pid;
1830 c.data.aevent = XFRM_AE_CU;
1831 km_state_notify(x, &c);
1838 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1839 struct nlattr **attrs)
1841 struct net *net = sock_net(skb->sk);
1843 u8 type = XFRM_POLICY_TYPE_MAIN;
1845 struct xfrm_audit audit_info;
1847 err = copy_from_user_policy_type(&type, attrs);
1851 audit_info.loginuid = audit_get_loginuid(current);
1852 audit_info.sessionid = audit_get_sessionid(current);
1853 security_task_getsecid(current, &audit_info.secid);
1854 err = xfrm_policy_flush(net, type, &audit_info);
1856 if (err == -ESRCH) /* empty table */
1862 c.event = nlh->nlmsg_type;
1863 c.seq = nlh->nlmsg_seq;
1864 c.pid = nlh->nlmsg_pid;
1866 km_policy_notify(NULL, 0, &c);
1870 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1871 struct nlattr **attrs)
1873 struct net *net = sock_net(skb->sk);
1874 struct xfrm_policy *xp;
1875 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1876 struct xfrm_userpolicy_info *p = &up->pol;
1877 u8 type = XFRM_POLICY_TYPE_MAIN;
1880 u32 mark = xfrm_mark_get(attrs, &m);
1882 err = copy_from_user_policy_type(&type, attrs);
1886 err = verify_policy_dir(p->dir);
1891 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1893 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1894 struct xfrm_sec_ctx *ctx;
1896 err = verify_sec_ctx_len(attrs);
1902 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1904 err = security_xfrm_policy_alloc(&ctx, uctx);
1908 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1909 &p->sel, ctx, 0, &err);
1910 security_xfrm_policy_free(ctx);
1915 if (unlikely(xp->walk.dead))
1920 uid_t loginuid = audit_get_loginuid(current);
1921 u32 sessionid = audit_get_sessionid(current);
1924 security_task_getsecid(current, &sid);
1925 xfrm_policy_delete(xp, p->dir);
1926 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1929 // reset the timers here?
1930 WARN(1, "Dont know what to do with soft policy expire\n");
1932 km_policy_expired(xp, p->dir, up->hard, current->pid);
1939 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1940 struct nlattr **attrs)
1942 struct net *net = sock_net(skb->sk);
1943 struct xfrm_state *x;
1945 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1946 struct xfrm_usersa_info *p = &ue->state;
1948 u32 mark = xfrm_mark_get(attrs, &m);
1950 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1956 spin_lock_bh(&x->lock);
1958 if (x->km.state != XFRM_STATE_VALID)
1960 km_state_expired(x, ue->hard, current->pid);
1963 uid_t loginuid = audit_get_loginuid(current);
1964 u32 sessionid = audit_get_sessionid(current);
1967 security_task_getsecid(current, &sid);
1968 __xfrm_state_delete(x);
1969 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1973 spin_unlock_bh(&x->lock);
1978 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1979 struct nlattr **attrs)
1981 struct net *net = sock_net(skb->sk);
1982 struct xfrm_policy *xp;
1983 struct xfrm_user_tmpl *ut;
1985 struct nlattr *rt = attrs[XFRMA_TMPL];
1986 struct xfrm_mark mark;
1988 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1989 struct xfrm_state *x = xfrm_state_alloc(net);
1995 xfrm_mark_get(attrs, &mark);
1997 err = verify_newpolicy_info(&ua->policy);
2002 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
2006 memcpy(&x->id, &ua->id, sizeof(ua->id));
2007 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2008 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
2009 xp->mark.m = x->mark.m = mark.m;
2010 xp->mark.v = x->mark.v = mark.v;
2012 /* extract the templates and for each call km_key */
2013 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2014 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2015 memcpy(&x->id, &t->id, sizeof(x->id));
2016 x->props.mode = t->mode;
2017 x->props.reqid = t->reqid;
2018 x->props.family = ut->family;
2019 t->aalgos = ua->aalgos;
2020 t->ealgos = ua->ealgos;
2021 t->calgos = ua->calgos;
2022 err = km_query(x, t, xp);
2032 WARN(1, "BAD policy passed\n");
2039 #ifdef CONFIG_XFRM_MIGRATE
2040 static int copy_from_user_migrate(struct xfrm_migrate *ma,
2041 struct xfrm_kmaddress *k,
2042 struct nlattr **attrs, int *num)
2044 struct nlattr *rt = attrs[XFRMA_MIGRATE];
2045 struct xfrm_user_migrate *um;
2049 struct xfrm_user_kmaddress *uk;
2051 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2052 memcpy(&k->local, &uk->local, sizeof(k->local));
2053 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2054 k->family = uk->family;
2055 k->reserved = uk->reserved;
2059 num_migrate = nla_len(rt) / sizeof(*um);
2061 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2064 for (i = 0; i < num_migrate; i++, um++, ma++) {
2065 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2066 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2067 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2068 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2070 ma->proto = um->proto;
2071 ma->mode = um->mode;
2072 ma->reqid = um->reqid;
2074 ma->old_family = um->old_family;
2075 ma->new_family = um->new_family;
2082 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2083 struct nlattr **attrs)
2085 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
2086 struct xfrm_migrate m[XFRM_MAX_DEPTH];
2087 struct xfrm_kmaddress km, *kmp;
2092 if (attrs[XFRMA_MIGRATE] == NULL)
2095 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2097 err = copy_from_user_policy_type(&type, attrs);
2101 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
2108 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
2113 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
2114 struct nlattr **attrs)
2116 return -ENOPROTOOPT;
2120 #ifdef CONFIG_XFRM_MIGRATE
2121 static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
2123 struct xfrm_user_migrate um;
2125 memset(&um, 0, sizeof(um));
2126 um.proto = m->proto;
2128 um.reqid = m->reqid;
2129 um.old_family = m->old_family;
2130 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2131 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2132 um.new_family = m->new_family;
2133 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2134 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2136 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2139 static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
2141 struct xfrm_user_kmaddress uk;
2143 memset(&uk, 0, sizeof(uk));
2144 uk.family = k->family;
2145 uk.reserved = k->reserved;
2146 memcpy(&uk.local, &k->local, sizeof(uk.local));
2147 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2149 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2152 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2154 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2155 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2156 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2157 + userpolicy_type_attrsize();
2160 static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2161 int num_migrate, const struct xfrm_kmaddress *k,
2162 const struct xfrm_selector *sel, u8 dir, u8 type)
2164 const struct xfrm_migrate *mp;
2165 struct xfrm_userpolicy_id *pol_id;
2166 struct nlmsghdr *nlh;
2169 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2173 pol_id = nlmsg_data(nlh);
2174 /* copy data from selector, dir, and type to the pol_id */
2175 memset(pol_id, 0, sizeof(*pol_id));
2176 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2179 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2182 if (copy_to_user_policy_type(type, skb) < 0)
2185 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2186 if (copy_to_user_migrate(mp, skb) < 0)
2190 return nlmsg_end(skb, nlh);
2192 nlmsg_cancel(skb, nlh);
2196 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2197 const struct xfrm_migrate *m, int num_migrate,
2198 const struct xfrm_kmaddress *k)
2200 struct net *net = &init_net;
2201 struct sk_buff *skb;
2203 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2208 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2211 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2214 static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2215 const struct xfrm_migrate *m, int num_migrate,
2216 const struct xfrm_kmaddress *k)
2218 return -ENOPROTOOPT;
2222 #define XMSGSIZE(type) sizeof(struct type)
2224 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2225 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2226 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2227 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2228 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2229 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2230 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2231 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2232 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2233 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2234 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2235 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2236 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2237 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2238 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2239 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2240 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2241 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2242 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2243 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2244 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2249 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2250 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2251 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2252 [XFRMA_LASTUSED] = { .type = NLA_U64},
2253 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2254 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2255 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2256 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2257 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2258 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2259 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2260 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2261 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2262 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2263 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2264 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2265 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2266 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2267 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2268 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2269 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2270 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2271 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2272 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
2275 static struct xfrm_link {
2276 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2277 int (*dump)(struct sk_buff *, struct netlink_callback *);
2278 int (*done)(struct netlink_callback *);
2279 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2280 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2281 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2282 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2283 .dump = xfrm_dump_sa,
2284 .done = xfrm_dump_sa_done },
2285 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2286 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2287 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2288 .dump = xfrm_dump_policy,
2289 .done = xfrm_dump_policy_done },
2290 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2291 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2292 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2293 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2294 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2295 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2296 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2297 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2298 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2299 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2300 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2301 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2302 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2305 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2307 struct net *net = sock_net(skb->sk);
2308 struct nlattr *attrs[XFRMA_MAX+1];
2309 struct xfrm_link *link;
2312 type = nlh->nlmsg_type;
2313 if (type > XFRM_MSG_MAX)
2316 type -= XFRM_MSG_BASE;
2317 link = &xfrm_dispatch[type];
2319 /* All operations require privileges, even GET */
2320 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2323 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2324 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2325 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2326 if (link->dump == NULL)
2329 return netlink_dump_start(net->xfrm.nlsk, skb, nlh,
2330 link->dump, link->done, 0);
2333 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2338 if (link->doit == NULL)
2341 return link->doit(skb, nlh, attrs);
2344 static void xfrm_netlink_rcv(struct sk_buff *skb)
2346 mutex_lock(&xfrm_cfg_mutex);
2347 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2348 mutex_unlock(&xfrm_cfg_mutex);
2351 static inline size_t xfrm_expire_msgsize(void)
2353 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2354 + nla_total_size(sizeof(struct xfrm_mark));
2357 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
2359 struct xfrm_user_expire *ue;
2360 struct nlmsghdr *nlh;
2362 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2366 ue = nlmsg_data(nlh);
2367 copy_to_user_state(x, &ue->state);
2368 ue->hard = (c->data.hard != 0) ? 1 : 0;
2370 if (xfrm_mark_put(skb, &x->mark))
2371 goto nla_put_failure;
2373 return nlmsg_end(skb, nlh);
2379 static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
2381 struct net *net = xs_net(x);
2382 struct sk_buff *skb;
2384 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2388 if (build_expire(skb, x, c) < 0) {
2393 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2396 static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
2398 struct net *net = xs_net(x);
2399 struct sk_buff *skb;
2401 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2405 if (build_aevent(skb, x, c) < 0)
2408 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2411 static int xfrm_notify_sa_flush(const struct km_event *c)
2413 struct net *net = c->net;
2414 struct xfrm_usersa_flush *p;
2415 struct nlmsghdr *nlh;
2416 struct sk_buff *skb;
2417 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2419 skb = nlmsg_new(len, GFP_ATOMIC);
2423 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2429 p = nlmsg_data(nlh);
2430 p->proto = c->data.proto;
2432 nlmsg_end(skb, nlh);
2434 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2437 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2441 l += nla_total_size(aead_len(x->aead));
2443 l += nla_total_size(sizeof(struct xfrm_algo) +
2444 (x->aalg->alg_key_len + 7) / 8);
2445 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2448 l += nla_total_size(xfrm_alg_len(x->ealg));
2450 l += nla_total_size(sizeof(*x->calg));
2452 l += nla_total_size(sizeof(*x->encap));
2454 l += nla_total_size(sizeof(x->tfcpad));
2456 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
2458 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2459 x->security->ctx_len);
2461 l += nla_total_size(sizeof(*x->coaddr));
2463 /* Must count x->lastused as it may become non-zero behind our back. */
2464 l += nla_total_size(sizeof(u64));
2469 static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
2471 struct net *net = xs_net(x);
2472 struct xfrm_usersa_info *p;
2473 struct xfrm_usersa_id *id;
2474 struct nlmsghdr *nlh;
2475 struct sk_buff *skb;
2476 int len = xfrm_sa_len(x);
2479 headlen = sizeof(*p);
2480 if (c->event == XFRM_MSG_DELSA) {
2481 len += nla_total_size(headlen);
2482 headlen = sizeof(*id);
2483 len += nla_total_size(sizeof(struct xfrm_mark));
2485 len += NLMSG_ALIGN(headlen);
2487 skb = nlmsg_new(len, GFP_ATOMIC);
2491 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2493 goto nla_put_failure;
2495 p = nlmsg_data(nlh);
2496 if (c->event == XFRM_MSG_DELSA) {
2497 struct nlattr *attr;
2499 id = nlmsg_data(nlh);
2500 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2501 id->spi = x->id.spi;
2502 id->family = x->props.family;
2503 id->proto = x->id.proto;
2505 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2507 goto nla_put_failure;
2512 if (copy_to_user_state_extra(x, p, skb))
2513 goto nla_put_failure;
2515 nlmsg_end(skb, nlh);
2517 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2520 /* Somebody screwed up with xfrm_sa_len! */
2526 static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
2530 case XFRM_MSG_EXPIRE:
2531 return xfrm_exp_state_notify(x, c);
2532 case XFRM_MSG_NEWAE:
2533 return xfrm_aevent_state_notify(x, c);
2534 case XFRM_MSG_DELSA:
2535 case XFRM_MSG_UPDSA:
2536 case XFRM_MSG_NEWSA:
2537 return xfrm_notify_sa(x, c);
2538 case XFRM_MSG_FLUSHSA:
2539 return xfrm_notify_sa_flush(c);
2541 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2550 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2551 struct xfrm_policy *xp)
2553 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2554 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2555 + nla_total_size(sizeof(struct xfrm_mark))
2556 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2557 + userpolicy_type_attrsize();
2560 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2561 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2564 struct xfrm_user_acquire *ua;
2565 struct nlmsghdr *nlh;
2566 __u32 seq = xfrm_get_acqseq();
2568 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2572 ua = nlmsg_data(nlh);
2573 memcpy(&ua->id, &x->id, sizeof(ua->id));
2574 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2575 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2576 copy_to_user_policy(xp, &ua->policy, dir);
2577 ua->aalgos = xt->aalgos;
2578 ua->ealgos = xt->ealgos;
2579 ua->calgos = xt->calgos;
2580 ua->seq = x->km.seq = seq;
2582 if (copy_to_user_tmpl(xp, skb) < 0)
2584 if (copy_to_user_state_sec_ctx(x, skb))
2586 if (copy_to_user_policy_type(xp->type, skb) < 0)
2588 if (xfrm_mark_put(skb, &xp->mark))
2589 goto nla_put_failure;
2591 return nlmsg_end(skb, nlh);
2595 nlmsg_cancel(skb, nlh);
2599 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2600 struct xfrm_policy *xp, int dir)
2602 struct net *net = xs_net(x);
2603 struct sk_buff *skb;
2605 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2609 if (build_acquire(skb, x, xt, xp, dir) < 0)
2612 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2615 /* User gives us xfrm_user_policy_info followed by an array of 0
2616 * or more templates.
2618 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2619 u8 *data, int len, int *dir)
2621 struct net *net = sock_net(sk);
2622 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2623 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2624 struct xfrm_policy *xp;
2627 switch (sk->sk_family) {
2629 if (opt != IP_XFRM_POLICY) {
2634 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2636 if (opt != IPV6_XFRM_POLICY) {
2649 if (len < sizeof(*p) ||
2650 verify_newpolicy_info(p))
2653 nr = ((len - sizeof(*p)) / sizeof(*ut));
2654 if (validate_tmpl(nr, ut, p->sel.family))
2657 if (p->dir > XFRM_POLICY_OUT)
2660 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2666 copy_from_user_policy(xp, p);
2667 xp->type = XFRM_POLICY_TYPE_MAIN;
2668 copy_templates(xp, ut, nr);
2675 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2677 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2678 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2679 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2680 + nla_total_size(sizeof(struct xfrm_mark))
2681 + userpolicy_type_attrsize();
2684 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2685 int dir, const struct km_event *c)
2687 struct xfrm_user_polexpire *upe;
2688 struct nlmsghdr *nlh;
2689 int hard = c->data.hard;
2691 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2695 upe = nlmsg_data(nlh);
2696 copy_to_user_policy(xp, &upe->pol, dir);
2697 if (copy_to_user_tmpl(xp, skb) < 0)
2699 if (copy_to_user_sec_ctx(xp, skb))
2701 if (copy_to_user_policy_type(xp->type, skb) < 0)
2703 if (xfrm_mark_put(skb, &xp->mark))
2704 goto nla_put_failure;
2707 return nlmsg_end(skb, nlh);
2711 nlmsg_cancel(skb, nlh);
2715 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2717 struct net *net = xp_net(xp);
2718 struct sk_buff *skb;
2720 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2724 if (build_polexpire(skb, xp, dir, c) < 0)
2727 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2730 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
2732 struct net *net = xp_net(xp);
2733 struct xfrm_userpolicy_info *p;
2734 struct xfrm_userpolicy_id *id;
2735 struct nlmsghdr *nlh;
2736 struct sk_buff *skb;
2737 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2740 headlen = sizeof(*p);
2741 if (c->event == XFRM_MSG_DELPOLICY) {
2742 len += nla_total_size(headlen);
2743 headlen = sizeof(*id);
2745 len += userpolicy_type_attrsize();
2746 len += nla_total_size(sizeof(struct xfrm_mark));
2747 len += NLMSG_ALIGN(headlen);
2749 skb = nlmsg_new(len, GFP_ATOMIC);
2753 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2757 p = nlmsg_data(nlh);
2758 if (c->event == XFRM_MSG_DELPOLICY) {
2759 struct nlattr *attr;
2761 id = nlmsg_data(nlh);
2762 memset(id, 0, sizeof(*id));
2765 id->index = xp->index;
2767 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2769 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2776 copy_to_user_policy(xp, p, dir);
2777 if (copy_to_user_tmpl(xp, skb) < 0)
2779 if (copy_to_user_policy_type(xp->type, skb) < 0)
2782 if (xfrm_mark_put(skb, &xp->mark))
2783 goto nla_put_failure;
2785 nlmsg_end(skb, nlh);
2787 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2795 static int xfrm_notify_policy_flush(const struct km_event *c)
2797 struct net *net = c->net;
2798 struct nlmsghdr *nlh;
2799 struct sk_buff *skb;
2801 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2805 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2808 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2811 nlmsg_end(skb, nlh);
2813 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2820 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
2824 case XFRM_MSG_NEWPOLICY:
2825 case XFRM_MSG_UPDPOLICY:
2826 case XFRM_MSG_DELPOLICY:
2827 return xfrm_notify_policy(xp, dir, c);
2828 case XFRM_MSG_FLUSHPOLICY:
2829 return xfrm_notify_policy_flush(c);
2830 case XFRM_MSG_POLEXPIRE:
2831 return xfrm_exp_policy_notify(xp, dir, c);
2833 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2841 static inline size_t xfrm_report_msgsize(void)
2843 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2846 static int build_report(struct sk_buff *skb, u8 proto,
2847 struct xfrm_selector *sel, xfrm_address_t *addr)
2849 struct xfrm_user_report *ur;
2850 struct nlmsghdr *nlh;
2852 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2856 ur = nlmsg_data(nlh);
2858 memcpy(&ur->sel, sel, sizeof(ur->sel));
2861 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2863 return nlmsg_end(skb, nlh);
2866 nlmsg_cancel(skb, nlh);
2870 static int xfrm_send_report(struct net *net, u8 proto,
2871 struct xfrm_selector *sel, xfrm_address_t *addr)
2873 struct sk_buff *skb;
2875 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2879 if (build_report(skb, proto, sel, addr) < 0)
2882 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2885 static inline size_t xfrm_mapping_msgsize(void)
2887 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2890 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2891 xfrm_address_t *new_saddr, __be16 new_sport)
2893 struct xfrm_user_mapping *um;
2894 struct nlmsghdr *nlh;
2896 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2900 um = nlmsg_data(nlh);
2902 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2903 um->id.spi = x->id.spi;
2904 um->id.family = x->props.family;
2905 um->id.proto = x->id.proto;
2906 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2907 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2908 um->new_sport = new_sport;
2909 um->old_sport = x->encap->encap_sport;
2910 um->reqid = x->props.reqid;
2912 return nlmsg_end(skb, nlh);
2915 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2918 struct net *net = xs_net(x);
2919 struct sk_buff *skb;
2921 if (x->id.proto != IPPROTO_ESP)
2927 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2931 if (build_mapping(skb, x, ipaddr, sport) < 0)
2934 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2937 static struct xfrm_mgr netlink_mgr = {
2939 .notify = xfrm_send_state_notify,
2940 .acquire = xfrm_send_acquire,
2941 .compile_policy = xfrm_compile_policy,
2942 .notify_policy = xfrm_send_policy_notify,
2943 .report = xfrm_send_report,
2944 .migrate = xfrm_send_migrate,
2945 .new_mapping = xfrm_send_mapping,
2948 static int __net_init xfrm_user_net_init(struct net *net)
2952 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
2953 xfrm_netlink_rcv, NULL, THIS_MODULE);
2956 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2957 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2961 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
2964 list_for_each_entry(net, net_exit_list, exit_list)
2965 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
2967 list_for_each_entry(net, net_exit_list, exit_list)
2968 netlink_kernel_release(net->xfrm.nlsk_stash);
2971 static struct pernet_operations xfrm_user_net_ops = {
2972 .init = xfrm_user_net_init,
2973 .exit_batch = xfrm_user_net_exit,
2976 static int __init xfrm_user_init(void)
2980 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2982 rv = register_pernet_subsys(&xfrm_user_net_ops);
2985 rv = xfrm_register_km(&netlink_mgr);
2987 unregister_pernet_subsys(&xfrm_user_net_ops);
2991 static void __exit xfrm_user_exit(void)
2993 xfrm_unregister_km(&netlink_mgr);
2994 unregister_pernet_subsys(&xfrm_user_net_ops);
2997 module_init(xfrm_user_init);
2998 module_exit(xfrm_user_exit);
2999 MODULE_LICENSE("GPL");
3000 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);