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>
29 #include <asm/uaccess.h>
30 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31 #include <linux/in6.h>
35 static struct xfrm_mark dummy_mark = {0, 0};
37 static inline int aead_len(struct xfrm_algo_aead *alg)
39 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
42 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
44 struct nlattr *rt = attrs[type];
45 struct xfrm_algo *algp;
51 if (nla_len(rt) < xfrm_alg_len(algp))
64 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
68 static int verify_auth_trunc(struct nlattr **attrs)
70 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
71 struct xfrm_algo_auth *algp;
77 if (nla_len(rt) < xfrm_alg_auth_len(algp))
80 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
84 static int verify_aead(struct nlattr **attrs)
86 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
87 struct xfrm_algo_aead *algp;
93 if (nla_len(rt) < aead_len(algp))
96 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
100 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
101 xfrm_address_t **addrp)
103 struct nlattr *rt = attrs[type];
106 *addrp = nla_data(rt);
109 static inline int verify_sec_ctx_len(struct nlattr **attrs)
111 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
112 struct xfrm_user_sec_ctx *uctx;
118 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
125 static int verify_newsa_info(struct xfrm_usersa_info *p,
126 struct nlattr **attrs)
136 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
148 switch (p->id.proto) {
150 if ((!attrs[XFRMA_ALG_AUTH] &&
151 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
152 attrs[XFRMA_ALG_AEAD] ||
153 attrs[XFRMA_ALG_CRYPT] ||
154 attrs[XFRMA_ALG_COMP])
159 if (attrs[XFRMA_ALG_COMP])
161 if (!attrs[XFRMA_ALG_AUTH] &&
162 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
163 !attrs[XFRMA_ALG_CRYPT] &&
164 !attrs[XFRMA_ALG_AEAD])
166 if ((attrs[XFRMA_ALG_AUTH] ||
167 attrs[XFRMA_ALG_AUTH_TRUNC] ||
168 attrs[XFRMA_ALG_CRYPT]) &&
169 attrs[XFRMA_ALG_AEAD])
174 if (!attrs[XFRMA_ALG_COMP] ||
175 attrs[XFRMA_ALG_AEAD] ||
176 attrs[XFRMA_ALG_AUTH] ||
177 attrs[XFRMA_ALG_AUTH_TRUNC] ||
178 attrs[XFRMA_ALG_CRYPT])
182 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
183 case IPPROTO_DSTOPTS:
184 case IPPROTO_ROUTING:
185 if (attrs[XFRMA_ALG_COMP] ||
186 attrs[XFRMA_ALG_AUTH] ||
187 attrs[XFRMA_ALG_AUTH_TRUNC] ||
188 attrs[XFRMA_ALG_AEAD] ||
189 attrs[XFRMA_ALG_CRYPT] ||
190 attrs[XFRMA_ENCAP] ||
191 attrs[XFRMA_SEC_CTX] ||
192 !attrs[XFRMA_COADDR])
201 if ((err = verify_aead(attrs)))
203 if ((err = verify_auth_trunc(attrs)))
205 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
207 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
209 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
211 if ((err = verify_sec_ctx_len(attrs)))
216 case XFRM_MODE_TRANSPORT:
217 case XFRM_MODE_TUNNEL:
218 case XFRM_MODE_ROUTEOPTIMIZATION:
232 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
233 struct xfrm_algo_desc *(*get_byname)(char *, int),
236 struct xfrm_algo *p, *ualg;
237 struct xfrm_algo_desc *algo;
242 ualg = nla_data(rta);
244 algo = get_byname(ualg->alg_name, 1);
247 *props = algo->desc.sadb_alg_id;
249 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
253 strcpy(p->alg_name, algo->name);
258 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
261 struct xfrm_algo *ualg;
262 struct xfrm_algo_auth *p;
263 struct xfrm_algo_desc *algo;
268 ualg = nla_data(rta);
270 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
273 *props = algo->desc.sadb_alg_id;
275 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
279 strcpy(p->alg_name, algo->name);
280 p->alg_key_len = ualg->alg_key_len;
281 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
282 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
288 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
291 struct xfrm_algo_auth *p, *ualg;
292 struct xfrm_algo_desc *algo;
297 ualg = nla_data(rta);
299 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
302 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
304 *props = algo->desc.sadb_alg_id;
306 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
310 strcpy(p->alg_name, algo->name);
311 if (!p->alg_trunc_len)
312 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
318 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
321 struct xfrm_algo_aead *p, *ualg;
322 struct xfrm_algo_desc *algo;
327 ualg = nla_data(rta);
329 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
332 *props = algo->desc.sadb_alg_id;
334 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
338 strcpy(p->alg_name, algo->name);
343 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
348 len += sizeof(struct xfrm_user_sec_ctx);
349 len += xfrm_ctx->ctx_len;
354 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
356 memcpy(&x->id, &p->id, sizeof(x->id));
357 memcpy(&x->sel, &p->sel, sizeof(x->sel));
358 memcpy(&x->lft, &p->lft, sizeof(x->lft));
359 x->props.mode = p->mode;
360 x->props.replay_window = p->replay_window;
361 x->props.reqid = p->reqid;
362 x->props.family = p->family;
363 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
364 x->props.flags = p->flags;
366 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
367 x->sel.family = p->family;
371 * someday when pfkey also has support, we could have the code
372 * somehow made shareable and move it to xfrm_state.c - JHS
375 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
377 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
378 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
379 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
380 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
383 struct xfrm_replay_state *replay;
384 replay = nla_data(rp);
385 memcpy(&x->replay, replay, sizeof(*replay));
386 memcpy(&x->preplay, replay, sizeof(*replay));
390 struct xfrm_lifetime_cur *ltime;
391 ltime = nla_data(lt);
392 x->curlft.bytes = ltime->bytes;
393 x->curlft.packets = ltime->packets;
394 x->curlft.add_time = ltime->add_time;
395 x->curlft.use_time = ltime->use_time;
399 x->replay_maxage = nla_get_u32(et);
402 x->replay_maxdiff = nla_get_u32(rt);
405 static struct xfrm_state *xfrm_state_construct(struct net *net,
406 struct xfrm_usersa_info *p,
407 struct nlattr **attrs,
410 struct xfrm_state *x = xfrm_state_alloc(net);
416 copy_from_user_state(x, p);
418 if ((err = attach_aead(&x->aead, &x->props.ealgo,
419 attrs[XFRMA_ALG_AEAD])))
421 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
422 attrs[XFRMA_ALG_AUTH_TRUNC])))
424 if (!x->props.aalgo) {
425 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
426 attrs[XFRMA_ALG_AUTH])))
429 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
430 xfrm_ealg_get_byname,
431 attrs[XFRMA_ALG_CRYPT])))
433 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
434 xfrm_calg_get_byname,
435 attrs[XFRMA_ALG_COMP])))
438 if (attrs[XFRMA_ENCAP]) {
439 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
440 sizeof(*x->encap), GFP_KERNEL);
441 if (x->encap == NULL)
445 if (attrs[XFRMA_COADDR]) {
446 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
447 sizeof(*x->coaddr), GFP_KERNEL);
448 if (x->coaddr == NULL)
452 err = xfrm_init_state(x);
456 if (attrs[XFRMA_SEC_CTX] &&
457 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
461 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
462 /* sysctl_xfrm_aevent_etime is in 100ms units */
463 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
464 x->preplay.bitmap = 0;
465 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
466 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
468 /* override default values from above */
470 xfrm_update_ae_params(x, attrs);
475 x->km.state = XFRM_STATE_DEAD;
482 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
483 struct nlattr **attrs)
485 struct net *net = sock_net(skb->sk);
486 struct xfrm_usersa_info *p = nlmsg_data(nlh);
487 struct xfrm_state *x;
490 uid_t loginuid = NETLINK_CB(skb).loginuid;
491 u32 sessionid = NETLINK_CB(skb).sessionid;
492 u32 sid = NETLINK_CB(skb).sid;
494 err = verify_newsa_info(p, attrs);
498 x = xfrm_state_construct(net, p, attrs, &err);
503 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
504 err = xfrm_state_add(x);
506 err = xfrm_state_update(x);
508 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
511 x->km.state = XFRM_STATE_DEAD;
516 c.seq = nlh->nlmsg_seq;
517 c.pid = nlh->nlmsg_pid;
518 c.event = nlh->nlmsg_type;
520 km_state_notify(x, &c);
526 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
527 struct xfrm_usersa_id *p,
528 struct nlattr **attrs,
531 struct xfrm_state *x = NULL;
534 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
536 x = xfrm_state_lookup(net, DUMMY_MARK, &p->daddr, p->spi, p->proto, p->family);
538 xfrm_address_t *saddr = NULL;
540 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
547 x = xfrm_state_lookup_byaddr(net, DUMMY_MARK, &p->daddr, saddr,
548 p->proto, p->family);
557 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
558 struct nlattr **attrs)
560 struct net *net = sock_net(skb->sk);
561 struct xfrm_state *x;
564 struct xfrm_usersa_id *p = nlmsg_data(nlh);
565 uid_t loginuid = NETLINK_CB(skb).loginuid;
566 u32 sessionid = NETLINK_CB(skb).sessionid;
567 u32 sid = NETLINK_CB(skb).sid;
569 x = xfrm_user_state_lookup(net, p, attrs, &err);
573 if ((err = security_xfrm_state_delete(x)) != 0)
576 if (xfrm_state_kern(x)) {
581 err = xfrm_state_delete(x);
586 c.seq = nlh->nlmsg_seq;
587 c.pid = nlh->nlmsg_pid;
588 c.event = nlh->nlmsg_type;
589 km_state_notify(x, &c);
592 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
597 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
599 memcpy(&p->id, &x->id, sizeof(p->id));
600 memcpy(&p->sel, &x->sel, sizeof(p->sel));
601 memcpy(&p->lft, &x->lft, sizeof(p->lft));
602 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
603 memcpy(&p->stats, &x->stats, sizeof(p->stats));
604 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
605 p->mode = x->props.mode;
606 p->replay_window = x->props.replay_window;
607 p->reqid = x->props.reqid;
608 p->family = x->props.family;
609 p->flags = x->props.flags;
613 struct xfrm_dump_info {
614 struct sk_buff *in_skb;
615 struct sk_buff *out_skb;
620 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
622 struct xfrm_user_sec_ctx *uctx;
624 int ctx_size = sizeof(*uctx) + s->ctx_len;
626 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
630 uctx = nla_data(attr);
631 uctx->exttype = XFRMA_SEC_CTX;
632 uctx->len = ctx_size;
633 uctx->ctx_doi = s->ctx_doi;
634 uctx->ctx_alg = s->ctx_alg;
635 uctx->ctx_len = s->ctx_len;
636 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
641 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
643 struct xfrm_algo *algo;
646 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
647 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
651 algo = nla_data(nla);
652 strcpy(algo->alg_name, auth->alg_name);
653 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
654 algo->alg_key_len = auth->alg_key_len;
659 /* Don't change this without updating xfrm_sa_len! */
660 static int copy_to_user_state_extra(struct xfrm_state *x,
661 struct xfrm_usersa_info *p,
664 copy_to_user_state(x, p);
667 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
670 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
673 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
675 if (copy_to_user_auth(x->aalg, skb))
676 goto nla_put_failure;
678 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
679 xfrm_alg_auth_len(x->aalg), x->aalg);
682 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
684 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
687 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
689 if (x->security && copy_sec_ctx(x->security, skb) < 0)
690 goto nla_put_failure;
698 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
700 struct xfrm_dump_info *sp = ptr;
701 struct sk_buff *in_skb = sp->in_skb;
702 struct sk_buff *skb = sp->out_skb;
703 struct xfrm_usersa_info *p;
704 struct nlmsghdr *nlh;
707 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
708 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
714 err = copy_to_user_state_extra(x, p, skb);
716 goto nla_put_failure;
722 nlmsg_cancel(skb, nlh);
726 static int xfrm_dump_sa_done(struct netlink_callback *cb)
728 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
729 xfrm_state_walk_done(walk);
733 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
735 struct net *net = sock_net(skb->sk);
736 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
737 struct xfrm_dump_info info;
739 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
740 sizeof(cb->args) - sizeof(cb->args[0]));
742 info.in_skb = cb->skb;
744 info.nlmsg_seq = cb->nlh->nlmsg_seq;
745 info.nlmsg_flags = NLM_F_MULTI;
749 xfrm_state_walk_init(walk, 0);
752 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
757 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
758 struct xfrm_state *x, u32 seq)
760 struct xfrm_dump_info info;
763 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
765 return ERR_PTR(-ENOMEM);
767 info.in_skb = in_skb;
769 info.nlmsg_seq = seq;
770 info.nlmsg_flags = 0;
772 if (dump_one_state(x, 0, &info)) {
780 static inline size_t xfrm_spdinfo_msgsize(void)
782 return NLMSG_ALIGN(4)
783 + nla_total_size(sizeof(struct xfrmu_spdinfo))
784 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
787 static int build_spdinfo(struct sk_buff *skb, struct net *net,
788 u32 pid, u32 seq, u32 flags)
790 struct xfrmk_spdinfo si;
791 struct xfrmu_spdinfo spc;
792 struct xfrmu_spdhinfo sph;
793 struct nlmsghdr *nlh;
796 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
797 if (nlh == NULL) /* shouldnt really happen ... */
802 xfrm_spd_getinfo(net, &si);
803 spc.incnt = si.incnt;
804 spc.outcnt = si.outcnt;
805 spc.fwdcnt = si.fwdcnt;
806 spc.inscnt = si.inscnt;
807 spc.outscnt = si.outscnt;
808 spc.fwdscnt = si.fwdscnt;
809 sph.spdhcnt = si.spdhcnt;
810 sph.spdhmcnt = si.spdhmcnt;
812 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
813 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
815 return nlmsg_end(skb, nlh);
818 nlmsg_cancel(skb, nlh);
822 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
823 struct nlattr **attrs)
825 struct net *net = sock_net(skb->sk);
826 struct sk_buff *r_skb;
827 u32 *flags = nlmsg_data(nlh);
828 u32 spid = NETLINK_CB(skb).pid;
829 u32 seq = nlh->nlmsg_seq;
831 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
835 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
838 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
841 static inline size_t xfrm_sadinfo_msgsize(void)
843 return NLMSG_ALIGN(4)
844 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
845 + nla_total_size(4); /* XFRMA_SAD_CNT */
848 static int build_sadinfo(struct sk_buff *skb, struct net *net,
849 u32 pid, u32 seq, u32 flags)
851 struct xfrmk_sadinfo si;
852 struct xfrmu_sadhinfo sh;
853 struct nlmsghdr *nlh;
856 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
857 if (nlh == NULL) /* shouldnt really happen ... */
862 xfrm_sad_getinfo(net, &si);
864 sh.sadhmcnt = si.sadhmcnt;
865 sh.sadhcnt = si.sadhcnt;
867 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
868 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
870 return nlmsg_end(skb, nlh);
873 nlmsg_cancel(skb, nlh);
877 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
878 struct nlattr **attrs)
880 struct net *net = sock_net(skb->sk);
881 struct sk_buff *r_skb;
882 u32 *flags = nlmsg_data(nlh);
883 u32 spid = NETLINK_CB(skb).pid;
884 u32 seq = nlh->nlmsg_seq;
886 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
890 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
893 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
896 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
897 struct nlattr **attrs)
899 struct net *net = sock_net(skb->sk);
900 struct xfrm_usersa_id *p = nlmsg_data(nlh);
901 struct xfrm_state *x;
902 struct sk_buff *resp_skb;
905 x = xfrm_user_state_lookup(net, p, attrs, &err);
909 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
910 if (IS_ERR(resp_skb)) {
911 err = PTR_ERR(resp_skb);
913 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
920 static int verify_userspi_info(struct xfrm_userspi_info *p)
922 switch (p->info.id.proto) {
928 /* IPCOMP spi is 16-bits. */
929 if (p->max >= 0x10000)
943 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
944 struct nlattr **attrs)
946 struct net *net = sock_net(skb->sk);
947 struct xfrm_state *x;
948 struct xfrm_userspi_info *p;
949 struct sk_buff *resp_skb;
950 xfrm_address_t *daddr;
955 err = verify_userspi_info(p);
959 family = p->info.family;
960 daddr = &p->info.id.daddr;
964 x = xfrm_find_acq_byseq(net, DUMMY_MARK, p->info.seq);
965 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
972 x = xfrm_find_acq(net, &dummy_mark, p->info.mode, p->info.reqid,
973 p->info.id.proto, daddr,
980 err = xfrm_alloc_spi(x, p->min, p->max);
984 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
985 if (IS_ERR(resp_skb)) {
986 err = PTR_ERR(resp_skb);
990 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
998 static int verify_policy_dir(u8 dir)
1001 case XFRM_POLICY_IN:
1002 case XFRM_POLICY_OUT:
1003 case XFRM_POLICY_FWD:
1013 static int verify_policy_type(u8 type)
1016 case XFRM_POLICY_TYPE_MAIN:
1017 #ifdef CONFIG_XFRM_SUB_POLICY
1018 case XFRM_POLICY_TYPE_SUB:
1029 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1032 case XFRM_SHARE_ANY:
1033 case XFRM_SHARE_SESSION:
1034 case XFRM_SHARE_USER:
1035 case XFRM_SHARE_UNIQUE:
1042 switch (p->action) {
1043 case XFRM_POLICY_ALLOW:
1044 case XFRM_POLICY_BLOCK:
1051 switch (p->sel.family) {
1056 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1059 return -EAFNOSUPPORT;
1066 return verify_policy_dir(p->dir);
1069 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1071 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1072 struct xfrm_user_sec_ctx *uctx;
1077 uctx = nla_data(rt);
1078 return security_xfrm_policy_alloc(&pol->security, uctx);
1081 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1087 for (i = 0; i < nr; i++, ut++) {
1088 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1090 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1091 memcpy(&t->saddr, &ut->saddr,
1092 sizeof(xfrm_address_t));
1093 t->reqid = ut->reqid;
1095 t->share = ut->share;
1096 t->optional = ut->optional;
1097 t->aalgos = ut->aalgos;
1098 t->ealgos = ut->ealgos;
1099 t->calgos = ut->calgos;
1100 /* If all masks are ~0, then we allow all algorithms. */
1101 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1102 t->encap_family = ut->family;
1106 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1110 if (nr > XFRM_MAX_DEPTH)
1113 for (i = 0; i < nr; i++) {
1114 /* We never validated the ut->family value, so many
1115 * applications simply leave it at zero. The check was
1116 * never made and ut->family was ignored because all
1117 * templates could be assumed to have the same family as
1118 * the policy itself. Now that we will have ipv4-in-ipv6
1119 * and ipv6-in-ipv4 tunnels, this is no longer true.
1122 ut[i].family = family;
1124 switch (ut[i].family) {
1127 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1139 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1141 struct nlattr *rt = attrs[XFRMA_TMPL];
1146 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1147 int nr = nla_len(rt) / sizeof(*utmpl);
1150 err = validate_tmpl(nr, utmpl, pol->family);
1154 copy_templates(pol, utmpl, nr);
1159 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1161 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1162 struct xfrm_userpolicy_type *upt;
1163 u8 type = XFRM_POLICY_TYPE_MAIN;
1171 err = verify_policy_type(type);
1179 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1181 xp->priority = p->priority;
1182 xp->index = p->index;
1183 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1184 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1185 xp->action = p->action;
1186 xp->flags = p->flags;
1187 xp->family = p->sel.family;
1188 /* XXX xp->share = p->share; */
1191 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1193 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1194 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1195 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1196 p->priority = xp->priority;
1197 p->index = xp->index;
1198 p->sel.family = xp->family;
1200 p->action = xp->action;
1201 p->flags = xp->flags;
1202 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1205 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1207 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1215 copy_from_user_policy(xp, p);
1217 err = copy_from_user_policy_type(&xp->type, attrs);
1221 if (!(err = copy_from_user_tmpl(xp, attrs)))
1222 err = copy_from_user_sec_ctx(xp, attrs);
1230 xfrm_policy_destroy(xp);
1234 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1235 struct nlattr **attrs)
1237 struct net *net = sock_net(skb->sk);
1238 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1239 struct xfrm_policy *xp;
1243 uid_t loginuid = NETLINK_CB(skb).loginuid;
1244 u32 sessionid = NETLINK_CB(skb).sessionid;
1245 u32 sid = NETLINK_CB(skb).sid;
1247 err = verify_newpolicy_info(p);
1250 err = verify_sec_ctx_len(attrs);
1254 xp = xfrm_policy_construct(net, p, attrs, &err);
1258 /* shouldnt excl be based on nlh flags??
1259 * Aha! this is anti-netlink really i.e more pfkey derived
1260 * in netlink excl is a flag and you wouldnt need
1261 * a type XFRM_MSG_UPDPOLICY - JHS */
1262 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1263 err = xfrm_policy_insert(p->dir, xp, excl);
1264 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1267 security_xfrm_policy_free(xp->security);
1272 c.event = nlh->nlmsg_type;
1273 c.seq = nlh->nlmsg_seq;
1274 c.pid = nlh->nlmsg_pid;
1275 km_policy_notify(xp, p->dir, &c);
1282 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1284 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1287 if (xp->xfrm_nr == 0)
1290 for (i = 0; i < xp->xfrm_nr; i++) {
1291 struct xfrm_user_tmpl *up = &vec[i];
1292 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1294 memcpy(&up->id, &kp->id, sizeof(up->id));
1295 up->family = kp->encap_family;
1296 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1297 up->reqid = kp->reqid;
1298 up->mode = kp->mode;
1299 up->share = kp->share;
1300 up->optional = kp->optional;
1301 up->aalgos = kp->aalgos;
1302 up->ealgos = kp->ealgos;
1303 up->calgos = kp->calgos;
1306 return nla_put(skb, XFRMA_TMPL,
1307 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1310 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1313 return copy_sec_ctx(x->security, skb);
1318 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1321 return copy_sec_ctx(xp->security, skb);
1325 static inline size_t userpolicy_type_attrsize(void)
1327 #ifdef CONFIG_XFRM_SUB_POLICY
1328 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1334 #ifdef CONFIG_XFRM_SUB_POLICY
1335 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1337 struct xfrm_userpolicy_type upt = {
1341 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1345 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1351 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1353 struct xfrm_dump_info *sp = ptr;
1354 struct xfrm_userpolicy_info *p;
1355 struct sk_buff *in_skb = sp->in_skb;
1356 struct sk_buff *skb = sp->out_skb;
1357 struct nlmsghdr *nlh;
1359 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1360 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1364 p = nlmsg_data(nlh);
1365 copy_to_user_policy(xp, p, dir);
1366 if (copy_to_user_tmpl(xp, skb) < 0)
1368 if (copy_to_user_sec_ctx(xp, skb))
1370 if (copy_to_user_policy_type(xp->type, skb) < 0)
1373 nlmsg_end(skb, nlh);
1377 nlmsg_cancel(skb, nlh);
1381 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1383 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1385 xfrm_policy_walk_done(walk);
1389 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1391 struct net *net = sock_net(skb->sk);
1392 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1393 struct xfrm_dump_info info;
1395 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1396 sizeof(cb->args) - sizeof(cb->args[0]));
1398 info.in_skb = cb->skb;
1400 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1401 info.nlmsg_flags = NLM_F_MULTI;
1405 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1408 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1413 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1414 struct xfrm_policy *xp,
1417 struct xfrm_dump_info info;
1418 struct sk_buff *skb;
1420 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1422 return ERR_PTR(-ENOMEM);
1424 info.in_skb = in_skb;
1426 info.nlmsg_seq = seq;
1427 info.nlmsg_flags = 0;
1429 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1437 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1438 struct nlattr **attrs)
1440 struct net *net = sock_net(skb->sk);
1441 struct xfrm_policy *xp;
1442 struct xfrm_userpolicy_id *p;
1443 u8 type = XFRM_POLICY_TYPE_MAIN;
1448 p = nlmsg_data(nlh);
1449 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1451 err = copy_from_user_policy_type(&type, attrs);
1455 err = verify_policy_dir(p->dir);
1460 xp = xfrm_policy_byid(net, DUMMY_MARK, type, p->dir, p->index, delete, &err);
1462 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1463 struct xfrm_sec_ctx *ctx;
1465 err = verify_sec_ctx_len(attrs);
1471 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1473 err = security_xfrm_policy_alloc(&ctx, uctx);
1477 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, type, p->dir,
1478 &p->sel, ctx, delete, &err);
1479 security_xfrm_policy_free(ctx);
1485 struct sk_buff *resp_skb;
1487 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1488 if (IS_ERR(resp_skb)) {
1489 err = PTR_ERR(resp_skb);
1491 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1492 NETLINK_CB(skb).pid);
1495 uid_t loginuid = NETLINK_CB(skb).loginuid;
1496 u32 sessionid = NETLINK_CB(skb).sessionid;
1497 u32 sid = NETLINK_CB(skb).sid;
1499 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1505 c.data.byid = p->index;
1506 c.event = nlh->nlmsg_type;
1507 c.seq = nlh->nlmsg_seq;
1508 c.pid = nlh->nlmsg_pid;
1509 km_policy_notify(xp, p->dir, &c);
1517 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1518 struct nlattr **attrs)
1520 struct net *net = sock_net(skb->sk);
1522 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1523 struct xfrm_audit audit_info;
1526 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1527 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1528 audit_info.secid = NETLINK_CB(skb).sid;
1529 err = xfrm_state_flush(net, p->proto, &audit_info);
1531 if (err == -ESRCH) /* empty table */
1535 c.data.proto = p->proto;
1536 c.event = nlh->nlmsg_type;
1537 c.seq = nlh->nlmsg_seq;
1538 c.pid = nlh->nlmsg_pid;
1540 km_state_notify(NULL, &c);
1545 static inline size_t xfrm_aevent_msgsize(void)
1547 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1548 + nla_total_size(sizeof(struct xfrm_replay_state))
1549 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1550 + nla_total_size(4) /* XFRM_AE_RTHR */
1551 + nla_total_size(4); /* XFRM_AE_ETHR */
1554 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1556 struct xfrm_aevent_id *id;
1557 struct nlmsghdr *nlh;
1559 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1563 id = nlmsg_data(nlh);
1564 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1565 id->sa_id.spi = x->id.spi;
1566 id->sa_id.family = x->props.family;
1567 id->sa_id.proto = x->id.proto;
1568 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1569 id->reqid = x->props.reqid;
1570 id->flags = c->data.aevent;
1572 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1573 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1575 if (id->flags & XFRM_AE_RTHR)
1576 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1578 if (id->flags & XFRM_AE_ETHR)
1579 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1580 x->replay_maxage * 10 / HZ);
1582 return nlmsg_end(skb, nlh);
1585 nlmsg_cancel(skb, nlh);
1589 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1590 struct nlattr **attrs)
1592 struct net *net = sock_net(skb->sk);
1593 struct xfrm_state *x;
1594 struct sk_buff *r_skb;
1597 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1598 struct xfrm_usersa_id *id = &p->sa_id;
1600 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1604 x = xfrm_state_lookup(net, DUMMY_MARK, &id->daddr, id->spi, id->proto, id->family);
1611 * XXX: is this lock really needed - none of the other
1612 * gets lock (the concern is things getting updated
1613 * while we are still reading) - jhs
1615 spin_lock_bh(&x->lock);
1616 c.data.aevent = p->flags;
1617 c.seq = nlh->nlmsg_seq;
1618 c.pid = nlh->nlmsg_pid;
1620 if (build_aevent(r_skb, x, &c) < 0)
1622 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1623 spin_unlock_bh(&x->lock);
1628 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1629 struct nlattr **attrs)
1631 struct net *net = sock_net(skb->sk);
1632 struct xfrm_state *x;
1635 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1636 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1637 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1642 /* pedantic mode - thou shalt sayeth replaceth */
1643 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1646 x = xfrm_state_lookup(net, DUMMY_MARK, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1650 if (x->km.state != XFRM_STATE_VALID)
1653 spin_lock_bh(&x->lock);
1654 xfrm_update_ae_params(x, attrs);
1655 spin_unlock_bh(&x->lock);
1657 c.event = nlh->nlmsg_type;
1658 c.seq = nlh->nlmsg_seq;
1659 c.pid = nlh->nlmsg_pid;
1660 c.data.aevent = XFRM_AE_CU;
1661 km_state_notify(x, &c);
1668 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1669 struct nlattr **attrs)
1671 struct net *net = sock_net(skb->sk);
1673 u8 type = XFRM_POLICY_TYPE_MAIN;
1675 struct xfrm_audit audit_info;
1677 err = copy_from_user_policy_type(&type, attrs);
1681 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1682 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1683 audit_info.secid = NETLINK_CB(skb).sid;
1684 err = xfrm_policy_flush(net, type, &audit_info);
1686 if (err == -ESRCH) /* empty table */
1692 c.event = nlh->nlmsg_type;
1693 c.seq = nlh->nlmsg_seq;
1694 c.pid = nlh->nlmsg_pid;
1696 km_policy_notify(NULL, 0, &c);
1700 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1701 struct nlattr **attrs)
1703 struct net *net = sock_net(skb->sk);
1704 struct xfrm_policy *xp;
1705 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1706 struct xfrm_userpolicy_info *p = &up->pol;
1707 u8 type = XFRM_POLICY_TYPE_MAIN;
1710 err = copy_from_user_policy_type(&type, attrs);
1715 xp = xfrm_policy_byid(net, DUMMY_MARK, type, p->dir, p->index, 0, &err);
1717 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1718 struct xfrm_sec_ctx *ctx;
1720 err = verify_sec_ctx_len(attrs);
1726 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1728 err = security_xfrm_policy_alloc(&ctx, uctx);
1732 xp = xfrm_policy_bysel_ctx(net, DUMMY_MARK, type, p->dir, &p->sel, ctx, 0, &err);
1733 security_xfrm_policy_free(ctx);
1738 read_lock(&xp->lock);
1739 if (xp->walk.dead) {
1740 read_unlock(&xp->lock);
1744 read_unlock(&xp->lock);
1747 uid_t loginuid = NETLINK_CB(skb).loginuid;
1748 uid_t sessionid = NETLINK_CB(skb).sessionid;
1749 u32 sid = NETLINK_CB(skb).sid;
1750 xfrm_policy_delete(xp, p->dir);
1751 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1754 // reset the timers here?
1755 printk("Dont know what to do with soft policy expire\n");
1757 km_policy_expired(xp, p->dir, up->hard, current->pid);
1764 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1765 struct nlattr **attrs)
1767 struct net *net = sock_net(skb->sk);
1768 struct xfrm_state *x;
1770 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1771 struct xfrm_usersa_info *p = &ue->state;
1773 x = xfrm_state_lookup(net, DUMMY_MARK, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1779 spin_lock_bh(&x->lock);
1781 if (x->km.state != XFRM_STATE_VALID)
1783 km_state_expired(x, ue->hard, current->pid);
1786 uid_t loginuid = NETLINK_CB(skb).loginuid;
1787 uid_t sessionid = NETLINK_CB(skb).sessionid;
1788 u32 sid = NETLINK_CB(skb).sid;
1789 __xfrm_state_delete(x);
1790 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1794 spin_unlock_bh(&x->lock);
1799 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1800 struct nlattr **attrs)
1802 struct net *net = sock_net(skb->sk);
1803 struct xfrm_policy *xp;
1804 struct xfrm_user_tmpl *ut;
1806 struct nlattr *rt = attrs[XFRMA_TMPL];
1808 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1809 struct xfrm_state *x = xfrm_state_alloc(net);
1815 err = verify_newpolicy_info(&ua->policy);
1820 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
1824 memcpy(&x->id, &ua->id, sizeof(ua->id));
1825 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1826 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1829 /* extract the templates and for each call km_key */
1830 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1831 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1832 memcpy(&x->id, &t->id, sizeof(x->id));
1833 x->props.mode = t->mode;
1834 x->props.reqid = t->reqid;
1835 x->props.family = ut->family;
1836 t->aalgos = ua->aalgos;
1837 t->ealgos = ua->ealgos;
1838 t->calgos = ua->calgos;
1839 err = km_query(x, t, xp);
1849 printk("BAD policy passed\n");
1856 #ifdef CONFIG_XFRM_MIGRATE
1857 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1858 struct xfrm_kmaddress *k,
1859 struct nlattr **attrs, int *num)
1861 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1862 struct xfrm_user_migrate *um;
1866 struct xfrm_user_kmaddress *uk;
1868 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1869 memcpy(&k->local, &uk->local, sizeof(k->local));
1870 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1871 k->family = uk->family;
1872 k->reserved = uk->reserved;
1876 num_migrate = nla_len(rt) / sizeof(*um);
1878 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1881 for (i = 0; i < num_migrate; i++, um++, ma++) {
1882 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1883 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1884 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1885 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1887 ma->proto = um->proto;
1888 ma->mode = um->mode;
1889 ma->reqid = um->reqid;
1891 ma->old_family = um->old_family;
1892 ma->new_family = um->new_family;
1899 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1900 struct nlattr **attrs)
1902 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1903 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1904 struct xfrm_kmaddress km, *kmp;
1909 if (attrs[XFRMA_MIGRATE] == NULL)
1912 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1914 err = copy_from_user_policy_type(&type, attrs);
1918 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
1925 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
1930 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1931 struct nlattr **attrs)
1933 return -ENOPROTOOPT;
1937 #ifdef CONFIG_XFRM_MIGRATE
1938 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1940 struct xfrm_user_migrate um;
1942 memset(&um, 0, sizeof(um));
1943 um.proto = m->proto;
1945 um.reqid = m->reqid;
1946 um.old_family = m->old_family;
1947 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1948 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1949 um.new_family = m->new_family;
1950 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1951 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1953 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1956 static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1958 struct xfrm_user_kmaddress uk;
1960 memset(&uk, 0, sizeof(uk));
1961 uk.family = k->family;
1962 uk.reserved = k->reserved;
1963 memcpy(&uk.local, &k->local, sizeof(uk.local));
1964 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
1966 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1969 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
1971 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1972 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1973 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1974 + userpolicy_type_attrsize();
1977 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1978 int num_migrate, struct xfrm_kmaddress *k,
1979 struct xfrm_selector *sel, u8 dir, u8 type)
1981 struct xfrm_migrate *mp;
1982 struct xfrm_userpolicy_id *pol_id;
1983 struct nlmsghdr *nlh;
1986 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1990 pol_id = nlmsg_data(nlh);
1991 /* copy data from selector, dir, and type to the pol_id */
1992 memset(pol_id, 0, sizeof(*pol_id));
1993 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1996 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1999 if (copy_to_user_policy_type(type, skb) < 0)
2002 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2003 if (copy_to_user_migrate(mp, skb) < 0)
2007 return nlmsg_end(skb, nlh);
2009 nlmsg_cancel(skb, nlh);
2013 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
2014 struct xfrm_migrate *m, int num_migrate,
2015 struct xfrm_kmaddress *k)
2017 struct net *net = &init_net;
2018 struct sk_buff *skb;
2020 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2025 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2028 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2031 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
2032 struct xfrm_migrate *m, int num_migrate,
2033 struct xfrm_kmaddress *k)
2035 return -ENOPROTOOPT;
2039 #define XMSGSIZE(type) sizeof(struct type)
2041 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2042 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2043 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2044 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2045 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2046 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2047 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2048 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2049 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2050 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2051 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2052 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2053 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2054 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2055 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2056 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2057 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2058 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2059 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2060 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2061 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2066 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2067 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2068 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2069 [XFRMA_LASTUSED] = { .type = NLA_U64},
2070 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2071 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2072 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2073 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2074 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2075 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2076 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2077 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2078 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2079 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2080 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2081 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2082 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2083 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2084 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2085 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2086 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2089 static struct xfrm_link {
2090 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2091 int (*dump)(struct sk_buff *, struct netlink_callback *);
2092 int (*done)(struct netlink_callback *);
2093 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2094 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2095 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2096 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2097 .dump = xfrm_dump_sa,
2098 .done = xfrm_dump_sa_done },
2099 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2100 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2101 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2102 .dump = xfrm_dump_policy,
2103 .done = xfrm_dump_policy_done },
2104 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2105 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2106 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2107 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2108 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2109 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2110 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2111 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2112 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2113 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2114 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2115 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2116 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2119 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2121 struct net *net = sock_net(skb->sk);
2122 struct nlattr *attrs[XFRMA_MAX+1];
2123 struct xfrm_link *link;
2126 type = nlh->nlmsg_type;
2127 if (type > XFRM_MSG_MAX)
2130 type -= XFRM_MSG_BASE;
2131 link = &xfrm_dispatch[type];
2133 /* All operations require privileges, even GET */
2134 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2137 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2138 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2139 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2140 if (link->dump == NULL)
2143 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
2146 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2151 if (link->doit == NULL)
2154 return link->doit(skb, nlh, attrs);
2157 static void xfrm_netlink_rcv(struct sk_buff *skb)
2159 mutex_lock(&xfrm_cfg_mutex);
2160 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2161 mutex_unlock(&xfrm_cfg_mutex);
2164 static inline size_t xfrm_expire_msgsize(void)
2166 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2169 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2171 struct xfrm_user_expire *ue;
2172 struct nlmsghdr *nlh;
2174 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2178 ue = nlmsg_data(nlh);
2179 copy_to_user_state(x, &ue->state);
2180 ue->hard = (c->data.hard != 0) ? 1 : 0;
2182 return nlmsg_end(skb, nlh);
2185 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2187 struct net *net = xs_net(x);
2188 struct sk_buff *skb;
2190 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2194 if (build_expire(skb, x, c) < 0)
2197 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2200 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2202 struct net *net = xs_net(x);
2203 struct sk_buff *skb;
2205 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2209 if (build_aevent(skb, x, c) < 0)
2212 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2215 static int xfrm_notify_sa_flush(struct km_event *c)
2217 struct net *net = c->net;
2218 struct xfrm_usersa_flush *p;
2219 struct nlmsghdr *nlh;
2220 struct sk_buff *skb;
2221 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2223 skb = nlmsg_new(len, GFP_ATOMIC);
2227 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2233 p = nlmsg_data(nlh);
2234 p->proto = c->data.proto;
2236 nlmsg_end(skb, nlh);
2238 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2241 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2245 l += nla_total_size(aead_len(x->aead));
2247 l += nla_total_size(sizeof(struct xfrm_algo) +
2248 (x->aalg->alg_key_len + 7) / 8);
2249 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2252 l += nla_total_size(xfrm_alg_len(x->ealg));
2254 l += nla_total_size(sizeof(*x->calg));
2256 l += nla_total_size(sizeof(*x->encap));
2258 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2259 x->security->ctx_len);
2261 l += nla_total_size(sizeof(*x->coaddr));
2263 /* Must count x->lastused as it may become non-zero behind our back. */
2264 l += nla_total_size(sizeof(u64));
2269 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2271 struct net *net = xs_net(x);
2272 struct xfrm_usersa_info *p;
2273 struct xfrm_usersa_id *id;
2274 struct nlmsghdr *nlh;
2275 struct sk_buff *skb;
2276 int len = xfrm_sa_len(x);
2279 headlen = sizeof(*p);
2280 if (c->event == XFRM_MSG_DELSA) {
2281 len += nla_total_size(headlen);
2282 headlen = sizeof(*id);
2284 len += NLMSG_ALIGN(headlen);
2286 skb = nlmsg_new(len, GFP_ATOMIC);
2290 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2292 goto nla_put_failure;
2294 p = nlmsg_data(nlh);
2295 if (c->event == XFRM_MSG_DELSA) {
2296 struct nlattr *attr;
2298 id = nlmsg_data(nlh);
2299 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2300 id->spi = x->id.spi;
2301 id->family = x->props.family;
2302 id->proto = x->id.proto;
2304 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2306 goto nla_put_failure;
2311 if (copy_to_user_state_extra(x, p, skb))
2312 goto nla_put_failure;
2314 nlmsg_end(skb, nlh);
2316 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2319 /* Somebody screwed up with xfrm_sa_len! */
2325 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2329 case XFRM_MSG_EXPIRE:
2330 return xfrm_exp_state_notify(x, c);
2331 case XFRM_MSG_NEWAE:
2332 return xfrm_aevent_state_notify(x, c);
2333 case XFRM_MSG_DELSA:
2334 case XFRM_MSG_UPDSA:
2335 case XFRM_MSG_NEWSA:
2336 return xfrm_notify_sa(x, c);
2337 case XFRM_MSG_FLUSHSA:
2338 return xfrm_notify_sa_flush(c);
2340 printk("xfrm_user: Unknown SA event %d\n", c->event);
2348 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2349 struct xfrm_policy *xp)
2351 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2352 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2353 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2354 + userpolicy_type_attrsize();
2357 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2358 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2361 struct xfrm_user_acquire *ua;
2362 struct nlmsghdr *nlh;
2363 __u32 seq = xfrm_get_acqseq();
2365 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2369 ua = nlmsg_data(nlh);
2370 memcpy(&ua->id, &x->id, sizeof(ua->id));
2371 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2372 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2373 copy_to_user_policy(xp, &ua->policy, dir);
2374 ua->aalgos = xt->aalgos;
2375 ua->ealgos = xt->ealgos;
2376 ua->calgos = xt->calgos;
2377 ua->seq = x->km.seq = seq;
2379 if (copy_to_user_tmpl(xp, skb) < 0)
2381 if (copy_to_user_state_sec_ctx(x, skb))
2383 if (copy_to_user_policy_type(xp->type, skb) < 0)
2386 return nlmsg_end(skb, nlh);
2389 nlmsg_cancel(skb, nlh);
2393 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2394 struct xfrm_policy *xp, int dir)
2396 struct net *net = xs_net(x);
2397 struct sk_buff *skb;
2399 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2403 if (build_acquire(skb, x, xt, xp, dir) < 0)
2406 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2409 /* User gives us xfrm_user_policy_info followed by an array of 0
2410 * or more templates.
2412 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2413 u8 *data, int len, int *dir)
2415 struct net *net = sock_net(sk);
2416 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2417 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2418 struct xfrm_policy *xp;
2421 switch (sk->sk_family) {
2423 if (opt != IP_XFRM_POLICY) {
2428 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2430 if (opt != IPV6_XFRM_POLICY) {
2443 if (len < sizeof(*p) ||
2444 verify_newpolicy_info(p))
2447 nr = ((len - sizeof(*p)) / sizeof(*ut));
2448 if (validate_tmpl(nr, ut, p->sel.family))
2451 if (p->dir > XFRM_POLICY_OUT)
2454 xp = xfrm_policy_alloc(net, GFP_KERNEL);
2460 copy_from_user_policy(xp, p);
2461 xp->type = XFRM_POLICY_TYPE_MAIN;
2462 copy_templates(xp, ut, nr);
2469 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2471 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2472 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2473 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2474 + userpolicy_type_attrsize();
2477 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2478 int dir, struct km_event *c)
2480 struct xfrm_user_polexpire *upe;
2481 struct nlmsghdr *nlh;
2482 int hard = c->data.hard;
2484 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2488 upe = nlmsg_data(nlh);
2489 copy_to_user_policy(xp, &upe->pol, dir);
2490 if (copy_to_user_tmpl(xp, skb) < 0)
2492 if (copy_to_user_sec_ctx(xp, skb))
2494 if (copy_to_user_policy_type(xp->type, skb) < 0)
2498 return nlmsg_end(skb, nlh);
2501 nlmsg_cancel(skb, nlh);
2505 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2507 struct net *net = xp_net(xp);
2508 struct sk_buff *skb;
2510 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2514 if (build_polexpire(skb, xp, dir, c) < 0)
2517 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2520 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2522 struct net *net = xp_net(xp);
2523 struct xfrm_userpolicy_info *p;
2524 struct xfrm_userpolicy_id *id;
2525 struct nlmsghdr *nlh;
2526 struct sk_buff *skb;
2527 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2530 headlen = sizeof(*p);
2531 if (c->event == XFRM_MSG_DELPOLICY) {
2532 len += nla_total_size(headlen);
2533 headlen = sizeof(*id);
2535 len += userpolicy_type_attrsize();
2536 len += NLMSG_ALIGN(headlen);
2538 skb = nlmsg_new(len, GFP_ATOMIC);
2542 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2546 p = nlmsg_data(nlh);
2547 if (c->event == XFRM_MSG_DELPOLICY) {
2548 struct nlattr *attr;
2550 id = nlmsg_data(nlh);
2551 memset(id, 0, sizeof(*id));
2554 id->index = xp->index;
2556 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2558 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2565 copy_to_user_policy(xp, p, dir);
2566 if (copy_to_user_tmpl(xp, skb) < 0)
2568 if (copy_to_user_policy_type(xp->type, skb) < 0)
2571 nlmsg_end(skb, nlh);
2573 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2580 static int xfrm_notify_policy_flush(struct km_event *c)
2582 struct net *net = c->net;
2583 struct nlmsghdr *nlh;
2584 struct sk_buff *skb;
2586 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2590 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2593 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2596 nlmsg_end(skb, nlh);
2598 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2605 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2609 case XFRM_MSG_NEWPOLICY:
2610 case XFRM_MSG_UPDPOLICY:
2611 case XFRM_MSG_DELPOLICY:
2612 return xfrm_notify_policy(xp, dir, c);
2613 case XFRM_MSG_FLUSHPOLICY:
2614 return xfrm_notify_policy_flush(c);
2615 case XFRM_MSG_POLEXPIRE:
2616 return xfrm_exp_policy_notify(xp, dir, c);
2618 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2625 static inline size_t xfrm_report_msgsize(void)
2627 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2630 static int build_report(struct sk_buff *skb, u8 proto,
2631 struct xfrm_selector *sel, xfrm_address_t *addr)
2633 struct xfrm_user_report *ur;
2634 struct nlmsghdr *nlh;
2636 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2640 ur = nlmsg_data(nlh);
2642 memcpy(&ur->sel, sel, sizeof(ur->sel));
2645 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2647 return nlmsg_end(skb, nlh);
2650 nlmsg_cancel(skb, nlh);
2654 static int xfrm_send_report(struct net *net, u8 proto,
2655 struct xfrm_selector *sel, xfrm_address_t *addr)
2657 struct sk_buff *skb;
2659 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2663 if (build_report(skb, proto, sel, addr) < 0)
2666 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2669 static inline size_t xfrm_mapping_msgsize(void)
2671 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2674 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2675 xfrm_address_t *new_saddr, __be16 new_sport)
2677 struct xfrm_user_mapping *um;
2678 struct nlmsghdr *nlh;
2680 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2684 um = nlmsg_data(nlh);
2686 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2687 um->id.spi = x->id.spi;
2688 um->id.family = x->props.family;
2689 um->id.proto = x->id.proto;
2690 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2691 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2692 um->new_sport = new_sport;
2693 um->old_sport = x->encap->encap_sport;
2694 um->reqid = x->props.reqid;
2696 return nlmsg_end(skb, nlh);
2699 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2702 struct net *net = xs_net(x);
2703 struct sk_buff *skb;
2705 if (x->id.proto != IPPROTO_ESP)
2711 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2715 if (build_mapping(skb, x, ipaddr, sport) < 0)
2718 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2721 static struct xfrm_mgr netlink_mgr = {
2723 .notify = xfrm_send_state_notify,
2724 .acquire = xfrm_send_acquire,
2725 .compile_policy = xfrm_compile_policy,
2726 .notify_policy = xfrm_send_policy_notify,
2727 .report = xfrm_send_report,
2728 .migrate = xfrm_send_migrate,
2729 .new_mapping = xfrm_send_mapping,
2732 static int __net_init xfrm_user_net_init(struct net *net)
2736 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
2737 xfrm_netlink_rcv, NULL, THIS_MODULE);
2740 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2741 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2745 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
2748 list_for_each_entry(net, net_exit_list, exit_list)
2749 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2751 list_for_each_entry(net, net_exit_list, exit_list)
2752 netlink_kernel_release(net->xfrm.nlsk_stash);
2755 static struct pernet_operations xfrm_user_net_ops = {
2756 .init = xfrm_user_net_init,
2757 .exit_batch = xfrm_user_net_exit,
2760 static int __init xfrm_user_init(void)
2764 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2766 rv = register_pernet_subsys(&xfrm_user_net_ops);
2769 rv = xfrm_register_km(&netlink_mgr);
2771 unregister_pernet_subsys(&xfrm_user_net_ops);
2775 static void __exit xfrm_user_exit(void)
2777 xfrm_unregister_km(&netlink_mgr);
2778 unregister_pernet_subsys(&xfrm_user_net_ops);
2781 module_init(xfrm_user_init);
2782 module_exit(xfrm_user_exit);
2783 MODULE_LICENSE("GPL");
2784 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);