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>
34 static inline int aead_len(struct xfrm_algo_aead *alg)
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
39 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
41 struct nlattr *rt = attrs[type];
42 struct xfrm_algo *algp;
48 if (nla_len(rt) < xfrm_alg_len(algp))
61 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
65 static int verify_aead(struct nlattr **attrs)
67 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
68 struct xfrm_algo_aead *algp;
74 if (nla_len(rt) < aead_len(algp))
77 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
81 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
82 xfrm_address_t **addrp)
84 struct nlattr *rt = attrs[type];
87 *addrp = nla_data(rt);
90 static inline int verify_sec_ctx_len(struct nlattr **attrs)
92 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
93 struct xfrm_user_sec_ctx *uctx;
99 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
106 static int verify_newsa_info(struct xfrm_usersa_info *p,
107 struct nlattr **attrs)
117 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
129 switch (p->id.proto) {
131 if (!attrs[XFRMA_ALG_AUTH] ||
132 attrs[XFRMA_ALG_AEAD] ||
133 attrs[XFRMA_ALG_CRYPT] ||
134 attrs[XFRMA_ALG_COMP])
139 if (attrs[XFRMA_ALG_COMP])
141 if (!attrs[XFRMA_ALG_AUTH] &&
142 !attrs[XFRMA_ALG_CRYPT] &&
143 !attrs[XFRMA_ALG_AEAD])
145 if ((attrs[XFRMA_ALG_AUTH] ||
146 attrs[XFRMA_ALG_CRYPT]) &&
147 attrs[XFRMA_ALG_AEAD])
152 if (!attrs[XFRMA_ALG_COMP] ||
153 attrs[XFRMA_ALG_AEAD] ||
154 attrs[XFRMA_ALG_AUTH] ||
155 attrs[XFRMA_ALG_CRYPT])
159 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
160 case IPPROTO_DSTOPTS:
161 case IPPROTO_ROUTING:
162 if (attrs[XFRMA_ALG_COMP] ||
163 attrs[XFRMA_ALG_AUTH] ||
164 attrs[XFRMA_ALG_AEAD] ||
165 attrs[XFRMA_ALG_CRYPT] ||
166 attrs[XFRMA_ENCAP] ||
167 attrs[XFRMA_SEC_CTX] ||
168 !attrs[XFRMA_COADDR])
177 if ((err = verify_aead(attrs)))
179 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
181 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
183 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
185 if ((err = verify_sec_ctx_len(attrs)))
190 case XFRM_MODE_TRANSPORT:
191 case XFRM_MODE_TUNNEL:
192 case XFRM_MODE_ROUTEOPTIMIZATION:
206 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
207 struct xfrm_algo_desc *(*get_byname)(char *, int),
210 struct xfrm_algo *p, *ualg;
211 struct xfrm_algo_desc *algo;
216 ualg = nla_data(rta);
218 algo = get_byname(ualg->alg_name, 1);
221 *props = algo->desc.sadb_alg_id;
223 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
227 strcpy(p->alg_name, algo->name);
232 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
235 struct xfrm_algo_aead *p, *ualg;
236 struct xfrm_algo_desc *algo;
241 ualg = nla_data(rta);
243 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
246 *props = algo->desc.sadb_alg_id;
248 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
252 strcpy(p->alg_name, algo->name);
257 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
262 len += sizeof(struct xfrm_user_sec_ctx);
263 len += xfrm_ctx->ctx_len;
268 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
270 memcpy(&x->id, &p->id, sizeof(x->id));
271 memcpy(&x->sel, &p->sel, sizeof(x->sel));
272 memcpy(&x->lft, &p->lft, sizeof(x->lft));
273 x->props.mode = p->mode;
274 x->props.replay_window = p->replay_window;
275 x->props.reqid = p->reqid;
276 x->props.family = p->family;
277 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
278 x->props.flags = p->flags;
280 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
281 x->sel.family = p->family;
285 * someday when pfkey also has support, we could have the code
286 * somehow made shareable and move it to xfrm_state.c - JHS
289 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
291 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
292 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
293 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
294 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
297 struct xfrm_replay_state *replay;
298 replay = nla_data(rp);
299 memcpy(&x->replay, replay, sizeof(*replay));
300 memcpy(&x->preplay, replay, sizeof(*replay));
304 struct xfrm_lifetime_cur *ltime;
305 ltime = nla_data(lt);
306 x->curlft.bytes = ltime->bytes;
307 x->curlft.packets = ltime->packets;
308 x->curlft.add_time = ltime->add_time;
309 x->curlft.use_time = ltime->use_time;
313 x->replay_maxage = nla_get_u32(et);
316 x->replay_maxdiff = nla_get_u32(rt);
319 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
320 struct nlattr **attrs,
323 struct xfrm_state *x = xfrm_state_alloc(&init_net);
329 copy_from_user_state(x, p);
331 if ((err = attach_aead(&x->aead, &x->props.ealgo,
332 attrs[XFRMA_ALG_AEAD])))
334 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
335 xfrm_aalg_get_byname,
336 attrs[XFRMA_ALG_AUTH])))
338 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
339 xfrm_ealg_get_byname,
340 attrs[XFRMA_ALG_CRYPT])))
342 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
343 xfrm_calg_get_byname,
344 attrs[XFRMA_ALG_COMP])))
347 if (attrs[XFRMA_ENCAP]) {
348 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
349 sizeof(*x->encap), GFP_KERNEL);
350 if (x->encap == NULL)
354 if (attrs[XFRMA_COADDR]) {
355 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
356 sizeof(*x->coaddr), GFP_KERNEL);
357 if (x->coaddr == NULL)
361 err = xfrm_init_state(x);
365 if (attrs[XFRMA_SEC_CTX] &&
366 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
370 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
371 /* sysctl_xfrm_aevent_etime is in 100ms units */
372 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
373 x->preplay.bitmap = 0;
374 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
375 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
377 /* override default values from above */
379 xfrm_update_ae_params(x, attrs);
384 x->km.state = XFRM_STATE_DEAD;
391 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
392 struct nlattr **attrs)
394 struct xfrm_usersa_info *p = nlmsg_data(nlh);
395 struct xfrm_state *x;
398 uid_t loginuid = NETLINK_CB(skb).loginuid;
399 u32 sessionid = NETLINK_CB(skb).sessionid;
400 u32 sid = NETLINK_CB(skb).sid;
402 err = verify_newsa_info(p, attrs);
406 x = xfrm_state_construct(p, attrs, &err);
411 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
412 err = xfrm_state_add(x);
414 err = xfrm_state_update(x);
416 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
419 x->km.state = XFRM_STATE_DEAD;
424 c.seq = nlh->nlmsg_seq;
425 c.pid = nlh->nlmsg_pid;
426 c.event = nlh->nlmsg_type;
428 km_state_notify(x, &c);
434 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
435 struct nlattr **attrs,
438 struct xfrm_state *x = NULL;
441 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
443 x = xfrm_state_lookup(&init_net, &p->daddr, p->spi, p->proto, p->family);
445 xfrm_address_t *saddr = NULL;
447 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
454 x = xfrm_state_lookup_byaddr(&init_net, &p->daddr, saddr,
455 p->proto, p->family);
464 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
465 struct nlattr **attrs)
467 struct xfrm_state *x;
470 struct xfrm_usersa_id *p = nlmsg_data(nlh);
471 uid_t loginuid = NETLINK_CB(skb).loginuid;
472 u32 sessionid = NETLINK_CB(skb).sessionid;
473 u32 sid = NETLINK_CB(skb).sid;
475 x = xfrm_user_state_lookup(p, attrs, &err);
479 if ((err = security_xfrm_state_delete(x)) != 0)
482 if (xfrm_state_kern(x)) {
487 err = xfrm_state_delete(x);
492 c.seq = nlh->nlmsg_seq;
493 c.pid = nlh->nlmsg_pid;
494 c.event = nlh->nlmsg_type;
495 km_state_notify(x, &c);
498 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
503 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
505 memcpy(&p->id, &x->id, sizeof(p->id));
506 memcpy(&p->sel, &x->sel, sizeof(p->sel));
507 memcpy(&p->lft, &x->lft, sizeof(p->lft));
508 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
509 memcpy(&p->stats, &x->stats, sizeof(p->stats));
510 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
511 p->mode = x->props.mode;
512 p->replay_window = x->props.replay_window;
513 p->reqid = x->props.reqid;
514 p->family = x->props.family;
515 p->flags = x->props.flags;
519 struct xfrm_dump_info {
520 struct sk_buff *in_skb;
521 struct sk_buff *out_skb;
526 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
528 struct xfrm_user_sec_ctx *uctx;
530 int ctx_size = sizeof(*uctx) + s->ctx_len;
532 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
536 uctx = nla_data(attr);
537 uctx->exttype = XFRMA_SEC_CTX;
538 uctx->len = ctx_size;
539 uctx->ctx_doi = s->ctx_doi;
540 uctx->ctx_alg = s->ctx_alg;
541 uctx->ctx_len = s->ctx_len;
542 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
547 /* Don't change this without updating xfrm_sa_len! */
548 static int copy_to_user_state_extra(struct xfrm_state *x,
549 struct xfrm_usersa_info *p,
552 copy_to_user_state(x, p);
555 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
558 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
561 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
563 NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg);
565 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
567 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
570 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
572 if (x->security && copy_sec_ctx(x->security, skb) < 0)
573 goto nla_put_failure;
581 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
583 struct xfrm_dump_info *sp = ptr;
584 struct sk_buff *in_skb = sp->in_skb;
585 struct sk_buff *skb = sp->out_skb;
586 struct xfrm_usersa_info *p;
587 struct nlmsghdr *nlh;
590 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
591 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
597 err = copy_to_user_state_extra(x, p, skb);
599 goto nla_put_failure;
605 nlmsg_cancel(skb, nlh);
609 static int xfrm_dump_sa_done(struct netlink_callback *cb)
611 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
612 xfrm_state_walk_done(walk);
616 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
618 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
619 struct xfrm_dump_info info;
621 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
622 sizeof(cb->args) - sizeof(cb->args[0]));
624 info.in_skb = cb->skb;
626 info.nlmsg_seq = cb->nlh->nlmsg_seq;
627 info.nlmsg_flags = NLM_F_MULTI;
631 xfrm_state_walk_init(walk, 0);
634 (void) xfrm_state_walk(&init_net, walk, dump_one_state, &info);
639 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
640 struct xfrm_state *x, u32 seq)
642 struct xfrm_dump_info info;
645 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
647 return ERR_PTR(-ENOMEM);
649 info.in_skb = in_skb;
651 info.nlmsg_seq = seq;
652 info.nlmsg_flags = 0;
654 if (dump_one_state(x, 0, &info)) {
662 static inline size_t xfrm_spdinfo_msgsize(void)
664 return NLMSG_ALIGN(4)
665 + nla_total_size(sizeof(struct xfrmu_spdinfo))
666 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
669 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
671 struct xfrmk_spdinfo si;
672 struct xfrmu_spdinfo spc;
673 struct xfrmu_spdhinfo sph;
674 struct nlmsghdr *nlh;
677 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
678 if (nlh == NULL) /* shouldnt really happen ... */
683 xfrm_spd_getinfo(&si);
684 spc.incnt = si.incnt;
685 spc.outcnt = si.outcnt;
686 spc.fwdcnt = si.fwdcnt;
687 spc.inscnt = si.inscnt;
688 spc.outscnt = si.outscnt;
689 spc.fwdscnt = si.fwdscnt;
690 sph.spdhcnt = si.spdhcnt;
691 sph.spdhmcnt = si.spdhmcnt;
693 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
694 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
696 return nlmsg_end(skb, nlh);
699 nlmsg_cancel(skb, nlh);
703 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
704 struct nlattr **attrs)
706 struct net *net = sock_net(skb->sk);
707 struct sk_buff *r_skb;
708 u32 *flags = nlmsg_data(nlh);
709 u32 spid = NETLINK_CB(skb).pid;
710 u32 seq = nlh->nlmsg_seq;
712 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
716 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
719 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
722 static inline size_t xfrm_sadinfo_msgsize(void)
724 return NLMSG_ALIGN(4)
725 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
726 + nla_total_size(4); /* XFRMA_SAD_CNT */
729 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
731 struct xfrmk_sadinfo si;
732 struct xfrmu_sadhinfo sh;
733 struct nlmsghdr *nlh;
736 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
737 if (nlh == NULL) /* shouldnt really happen ... */
742 xfrm_sad_getinfo(&si);
744 sh.sadhmcnt = si.sadhmcnt;
745 sh.sadhcnt = si.sadhcnt;
747 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
748 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
750 return nlmsg_end(skb, nlh);
753 nlmsg_cancel(skb, nlh);
757 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
758 struct nlattr **attrs)
760 struct net *net = sock_net(skb->sk);
761 struct sk_buff *r_skb;
762 u32 *flags = nlmsg_data(nlh);
763 u32 spid = NETLINK_CB(skb).pid;
764 u32 seq = nlh->nlmsg_seq;
766 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
770 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
773 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
776 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
777 struct nlattr **attrs)
779 struct net *net = &init_net;
780 struct xfrm_usersa_id *p = nlmsg_data(nlh);
781 struct xfrm_state *x;
782 struct sk_buff *resp_skb;
785 x = xfrm_user_state_lookup(p, attrs, &err);
789 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
790 if (IS_ERR(resp_skb)) {
791 err = PTR_ERR(resp_skb);
793 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
800 static int verify_userspi_info(struct xfrm_userspi_info *p)
802 switch (p->info.id.proto) {
808 /* IPCOMP spi is 16-bits. */
809 if (p->max >= 0x10000)
823 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
824 struct nlattr **attrs)
826 struct net *net = &init_net;
827 struct xfrm_state *x;
828 struct xfrm_userspi_info *p;
829 struct sk_buff *resp_skb;
830 xfrm_address_t *daddr;
835 err = verify_userspi_info(p);
839 family = p->info.family;
840 daddr = &p->info.id.daddr;
844 x = xfrm_find_acq_byseq(net, p->info.seq);
845 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
852 x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
853 p->info.id.proto, daddr,
860 err = xfrm_alloc_spi(x, p->min, p->max);
864 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
865 if (IS_ERR(resp_skb)) {
866 err = PTR_ERR(resp_skb);
870 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
878 static int verify_policy_dir(u8 dir)
882 case XFRM_POLICY_OUT:
883 case XFRM_POLICY_FWD:
893 static int verify_policy_type(u8 type)
896 case XFRM_POLICY_TYPE_MAIN:
897 #ifdef CONFIG_XFRM_SUB_POLICY
898 case XFRM_POLICY_TYPE_SUB:
909 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
913 case XFRM_SHARE_SESSION:
914 case XFRM_SHARE_USER:
915 case XFRM_SHARE_UNIQUE:
923 case XFRM_POLICY_ALLOW:
924 case XFRM_POLICY_BLOCK:
931 switch (p->sel.family) {
936 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
939 return -EAFNOSUPPORT;
946 return verify_policy_dir(p->dir);
949 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
951 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
952 struct xfrm_user_sec_ctx *uctx;
958 return security_xfrm_policy_alloc(&pol->security, uctx);
961 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
967 for (i = 0; i < nr; i++, ut++) {
968 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
970 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
971 memcpy(&t->saddr, &ut->saddr,
972 sizeof(xfrm_address_t));
973 t->reqid = ut->reqid;
975 t->share = ut->share;
976 t->optional = ut->optional;
977 t->aalgos = ut->aalgos;
978 t->ealgos = ut->ealgos;
979 t->calgos = ut->calgos;
980 /* If all masks are ~0, then we allow all algorithms. */
981 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
982 t->encap_family = ut->family;
986 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
990 if (nr > XFRM_MAX_DEPTH)
993 for (i = 0; i < nr; i++) {
994 /* We never validated the ut->family value, so many
995 * applications simply leave it at zero. The check was
996 * never made and ut->family was ignored because all
997 * templates could be assumed to have the same family as
998 * the policy itself. Now that we will have ipv4-in-ipv6
999 * and ipv6-in-ipv4 tunnels, this is no longer true.
1002 ut[i].family = family;
1004 switch (ut[i].family) {
1007 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1019 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1021 struct nlattr *rt = attrs[XFRMA_TMPL];
1026 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1027 int nr = nla_len(rt) / sizeof(*utmpl);
1030 err = validate_tmpl(nr, utmpl, pol->family);
1034 copy_templates(pol, utmpl, nr);
1039 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1041 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1042 struct xfrm_userpolicy_type *upt;
1043 u8 type = XFRM_POLICY_TYPE_MAIN;
1051 err = verify_policy_type(type);
1059 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1061 xp->priority = p->priority;
1062 xp->index = p->index;
1063 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1064 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1065 xp->action = p->action;
1066 xp->flags = p->flags;
1067 xp->family = p->sel.family;
1068 /* XXX xp->share = p->share; */
1071 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1073 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1074 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1075 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1076 p->priority = xp->priority;
1077 p->index = xp->index;
1078 p->sel.family = xp->family;
1080 p->action = xp->action;
1081 p->flags = xp->flags;
1082 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1085 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1087 struct xfrm_policy *xp = xfrm_policy_alloc(&init_net, GFP_KERNEL);
1095 copy_from_user_policy(xp, p);
1097 err = copy_from_user_policy_type(&xp->type, attrs);
1101 if (!(err = copy_from_user_tmpl(xp, attrs)))
1102 err = copy_from_user_sec_ctx(xp, attrs);
1110 xfrm_policy_destroy(xp);
1114 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1115 struct nlattr **attrs)
1117 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1118 struct xfrm_policy *xp;
1122 uid_t loginuid = NETLINK_CB(skb).loginuid;
1123 u32 sessionid = NETLINK_CB(skb).sessionid;
1124 u32 sid = NETLINK_CB(skb).sid;
1126 err = verify_newpolicy_info(p);
1129 err = verify_sec_ctx_len(attrs);
1133 xp = xfrm_policy_construct(p, attrs, &err);
1137 /* shouldnt excl be based on nlh flags??
1138 * Aha! this is anti-netlink really i.e more pfkey derived
1139 * in netlink excl is a flag and you wouldnt need
1140 * a type XFRM_MSG_UPDPOLICY - JHS */
1141 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1142 err = xfrm_policy_insert(p->dir, xp, excl);
1143 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1146 security_xfrm_policy_free(xp->security);
1151 c.event = nlh->nlmsg_type;
1152 c.seq = nlh->nlmsg_seq;
1153 c.pid = nlh->nlmsg_pid;
1154 km_policy_notify(xp, p->dir, &c);
1161 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1163 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1166 if (xp->xfrm_nr == 0)
1169 for (i = 0; i < xp->xfrm_nr; i++) {
1170 struct xfrm_user_tmpl *up = &vec[i];
1171 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1173 memcpy(&up->id, &kp->id, sizeof(up->id));
1174 up->family = kp->encap_family;
1175 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1176 up->reqid = kp->reqid;
1177 up->mode = kp->mode;
1178 up->share = kp->share;
1179 up->optional = kp->optional;
1180 up->aalgos = kp->aalgos;
1181 up->ealgos = kp->ealgos;
1182 up->calgos = kp->calgos;
1185 return nla_put(skb, XFRMA_TMPL,
1186 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1189 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1192 return copy_sec_ctx(x->security, skb);
1197 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1200 return copy_sec_ctx(xp->security, skb);
1204 static inline size_t userpolicy_type_attrsize(void)
1206 #ifdef CONFIG_XFRM_SUB_POLICY
1207 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1213 #ifdef CONFIG_XFRM_SUB_POLICY
1214 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1216 struct xfrm_userpolicy_type upt = {
1220 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1224 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1230 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1232 struct xfrm_dump_info *sp = ptr;
1233 struct xfrm_userpolicy_info *p;
1234 struct sk_buff *in_skb = sp->in_skb;
1235 struct sk_buff *skb = sp->out_skb;
1236 struct nlmsghdr *nlh;
1238 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1239 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1243 p = nlmsg_data(nlh);
1244 copy_to_user_policy(xp, p, dir);
1245 if (copy_to_user_tmpl(xp, skb) < 0)
1247 if (copy_to_user_sec_ctx(xp, skb))
1249 if (copy_to_user_policy_type(xp->type, skb) < 0)
1252 nlmsg_end(skb, nlh);
1256 nlmsg_cancel(skb, nlh);
1260 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1262 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1264 xfrm_policy_walk_done(walk);
1268 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1270 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1271 struct xfrm_dump_info info;
1273 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1274 sizeof(cb->args) - sizeof(cb->args[0]));
1276 info.in_skb = cb->skb;
1278 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1279 info.nlmsg_flags = NLM_F_MULTI;
1283 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1286 (void) xfrm_policy_walk(&init_net, walk, dump_one_policy, &info);
1291 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1292 struct xfrm_policy *xp,
1295 struct xfrm_dump_info info;
1296 struct sk_buff *skb;
1298 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1300 return ERR_PTR(-ENOMEM);
1302 info.in_skb = in_skb;
1304 info.nlmsg_seq = seq;
1305 info.nlmsg_flags = 0;
1307 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1315 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1316 struct nlattr **attrs)
1318 struct net *net = &init_net;
1319 struct xfrm_policy *xp;
1320 struct xfrm_userpolicy_id *p;
1321 u8 type = XFRM_POLICY_TYPE_MAIN;
1326 p = nlmsg_data(nlh);
1327 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1329 err = copy_from_user_policy_type(&type, attrs);
1333 err = verify_policy_dir(p->dir);
1338 xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
1340 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1341 struct xfrm_sec_ctx *ctx;
1343 err = verify_sec_ctx_len(attrs);
1349 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1351 err = security_xfrm_policy_alloc(&ctx, uctx);
1355 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
1357 security_xfrm_policy_free(ctx);
1363 struct sk_buff *resp_skb;
1365 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1366 if (IS_ERR(resp_skb)) {
1367 err = PTR_ERR(resp_skb);
1369 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1370 NETLINK_CB(skb).pid);
1373 uid_t loginuid = NETLINK_CB(skb).loginuid;
1374 u32 sessionid = NETLINK_CB(skb).sessionid;
1375 u32 sid = NETLINK_CB(skb).sid;
1377 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1383 c.data.byid = p->index;
1384 c.event = nlh->nlmsg_type;
1385 c.seq = nlh->nlmsg_seq;
1386 c.pid = nlh->nlmsg_pid;
1387 km_policy_notify(xp, p->dir, &c);
1395 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1396 struct nlattr **attrs)
1399 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1400 struct xfrm_audit audit_info;
1403 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1404 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1405 audit_info.secid = NETLINK_CB(skb).sid;
1406 err = xfrm_state_flush(&init_net, p->proto, &audit_info);
1409 c.data.proto = p->proto;
1410 c.event = nlh->nlmsg_type;
1411 c.seq = nlh->nlmsg_seq;
1412 c.pid = nlh->nlmsg_pid;
1413 km_state_notify(NULL, &c);
1418 static inline size_t xfrm_aevent_msgsize(void)
1420 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1421 + nla_total_size(sizeof(struct xfrm_replay_state))
1422 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1423 + nla_total_size(4) /* XFRM_AE_RTHR */
1424 + nla_total_size(4); /* XFRM_AE_ETHR */
1427 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1429 struct xfrm_aevent_id *id;
1430 struct nlmsghdr *nlh;
1432 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1436 id = nlmsg_data(nlh);
1437 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1438 id->sa_id.spi = x->id.spi;
1439 id->sa_id.family = x->props.family;
1440 id->sa_id.proto = x->id.proto;
1441 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1442 id->reqid = x->props.reqid;
1443 id->flags = c->data.aevent;
1445 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1446 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1448 if (id->flags & XFRM_AE_RTHR)
1449 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1451 if (id->flags & XFRM_AE_ETHR)
1452 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1453 x->replay_maxage * 10 / HZ);
1455 return nlmsg_end(skb, nlh);
1458 nlmsg_cancel(skb, nlh);
1462 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1463 struct nlattr **attrs)
1465 struct net *net = &init_net;
1466 struct xfrm_state *x;
1467 struct sk_buff *r_skb;
1470 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1471 struct xfrm_usersa_id *id = &p->sa_id;
1473 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1477 x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
1484 * XXX: is this lock really needed - none of the other
1485 * gets lock (the concern is things getting updated
1486 * while we are still reading) - jhs
1488 spin_lock_bh(&x->lock);
1489 c.data.aevent = p->flags;
1490 c.seq = nlh->nlmsg_seq;
1491 c.pid = nlh->nlmsg_pid;
1493 if (build_aevent(r_skb, x, &c) < 0)
1495 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1496 spin_unlock_bh(&x->lock);
1501 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1502 struct nlattr **attrs)
1504 struct xfrm_state *x;
1507 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1508 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1509 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1514 /* pedantic mode - thou shalt sayeth replaceth */
1515 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1518 x = xfrm_state_lookup(&init_net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1522 if (x->km.state != XFRM_STATE_VALID)
1525 spin_lock_bh(&x->lock);
1526 xfrm_update_ae_params(x, attrs);
1527 spin_unlock_bh(&x->lock);
1529 c.event = nlh->nlmsg_type;
1530 c.seq = nlh->nlmsg_seq;
1531 c.pid = nlh->nlmsg_pid;
1532 c.data.aevent = XFRM_AE_CU;
1533 km_state_notify(x, &c);
1540 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1541 struct nlattr **attrs)
1544 u8 type = XFRM_POLICY_TYPE_MAIN;
1546 struct xfrm_audit audit_info;
1548 err = copy_from_user_policy_type(&type, attrs);
1552 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1553 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1554 audit_info.secid = NETLINK_CB(skb).sid;
1555 err = xfrm_policy_flush(&init_net, type, &audit_info);
1559 c.event = nlh->nlmsg_type;
1560 c.seq = nlh->nlmsg_seq;
1561 c.pid = nlh->nlmsg_pid;
1562 km_policy_notify(NULL, 0, &c);
1566 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1567 struct nlattr **attrs)
1569 struct xfrm_policy *xp;
1570 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1571 struct xfrm_userpolicy_info *p = &up->pol;
1572 u8 type = XFRM_POLICY_TYPE_MAIN;
1575 err = copy_from_user_policy_type(&type, attrs);
1580 xp = xfrm_policy_byid(&init_net, type, p->dir, p->index, 0, &err);
1582 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1583 struct xfrm_sec_ctx *ctx;
1585 err = verify_sec_ctx_len(attrs);
1591 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1593 err = security_xfrm_policy_alloc(&ctx, uctx);
1597 xp = xfrm_policy_bysel_ctx(&init_net, type, p->dir, &p->sel, ctx, 0, &err);
1598 security_xfrm_policy_free(ctx);
1603 read_lock(&xp->lock);
1604 if (xp->walk.dead) {
1605 read_unlock(&xp->lock);
1609 read_unlock(&xp->lock);
1612 uid_t loginuid = NETLINK_CB(skb).loginuid;
1613 uid_t sessionid = NETLINK_CB(skb).sessionid;
1614 u32 sid = NETLINK_CB(skb).sid;
1615 xfrm_policy_delete(xp, p->dir);
1616 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1619 // reset the timers here?
1620 printk("Dont know what to do with soft policy expire\n");
1622 km_policy_expired(xp, p->dir, up->hard, current->pid);
1629 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1630 struct nlattr **attrs)
1632 struct xfrm_state *x;
1634 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1635 struct xfrm_usersa_info *p = &ue->state;
1637 x = xfrm_state_lookup(&init_net, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1643 spin_lock_bh(&x->lock);
1645 if (x->km.state != XFRM_STATE_VALID)
1647 km_state_expired(x, ue->hard, current->pid);
1650 uid_t loginuid = NETLINK_CB(skb).loginuid;
1651 uid_t sessionid = NETLINK_CB(skb).sessionid;
1652 u32 sid = NETLINK_CB(skb).sid;
1653 __xfrm_state_delete(x);
1654 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1658 spin_unlock_bh(&x->lock);
1663 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1664 struct nlattr **attrs)
1666 struct xfrm_policy *xp;
1667 struct xfrm_user_tmpl *ut;
1669 struct nlattr *rt = attrs[XFRMA_TMPL];
1671 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1672 struct xfrm_state *x = xfrm_state_alloc(&init_net);
1678 err = verify_newpolicy_info(&ua->policy);
1680 printk("BAD policy passed\n");
1686 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
1692 memcpy(&x->id, &ua->id, sizeof(ua->id));
1693 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1694 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1697 /* extract the templates and for each call km_key */
1698 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1699 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1700 memcpy(&x->id, &t->id, sizeof(x->id));
1701 x->props.mode = t->mode;
1702 x->props.reqid = t->reqid;
1703 x->props.family = ut->family;
1704 t->aalgos = ua->aalgos;
1705 t->ealgos = ua->ealgos;
1706 t->calgos = ua->calgos;
1707 err = km_query(x, t, xp);
1717 #ifdef CONFIG_XFRM_MIGRATE
1718 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1719 struct xfrm_kmaddress *k,
1720 struct nlattr **attrs, int *num)
1722 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1723 struct xfrm_user_migrate *um;
1727 struct xfrm_user_kmaddress *uk;
1729 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1730 memcpy(&k->local, &uk->local, sizeof(k->local));
1731 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1732 k->family = uk->family;
1733 k->reserved = uk->reserved;
1737 num_migrate = nla_len(rt) / sizeof(*um);
1739 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1742 for (i = 0; i < num_migrate; i++, um++, ma++) {
1743 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1744 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1745 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1746 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1748 ma->proto = um->proto;
1749 ma->mode = um->mode;
1750 ma->reqid = um->reqid;
1752 ma->old_family = um->old_family;
1753 ma->new_family = um->new_family;
1760 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1761 struct nlattr **attrs)
1763 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1764 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1765 struct xfrm_kmaddress km, *kmp;
1770 if (attrs[XFRMA_MIGRATE] == NULL)
1773 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1775 err = copy_from_user_policy_type(&type, attrs);
1779 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
1786 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
1791 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1792 struct nlattr **attrs)
1794 return -ENOPROTOOPT;
1798 #ifdef CONFIG_XFRM_MIGRATE
1799 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1801 struct xfrm_user_migrate um;
1803 memset(&um, 0, sizeof(um));
1804 um.proto = m->proto;
1806 um.reqid = m->reqid;
1807 um.old_family = m->old_family;
1808 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1809 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1810 um.new_family = m->new_family;
1811 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1812 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1814 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1817 static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1819 struct xfrm_user_kmaddress uk;
1821 memset(&uk, 0, sizeof(uk));
1822 uk.family = k->family;
1823 uk.reserved = k->reserved;
1824 memcpy(&uk.local, &k->local, sizeof(uk.local));
1825 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
1827 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1830 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
1832 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1833 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1834 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1835 + userpolicy_type_attrsize();
1838 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1839 int num_migrate, struct xfrm_kmaddress *k,
1840 struct xfrm_selector *sel, u8 dir, u8 type)
1842 struct xfrm_migrate *mp;
1843 struct xfrm_userpolicy_id *pol_id;
1844 struct nlmsghdr *nlh;
1847 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1851 pol_id = nlmsg_data(nlh);
1852 /* copy data from selector, dir, and type to the pol_id */
1853 memset(pol_id, 0, sizeof(*pol_id));
1854 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1857 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1860 if (copy_to_user_policy_type(type, skb) < 0)
1863 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1864 if (copy_to_user_migrate(mp, skb) < 0)
1868 return nlmsg_end(skb, nlh);
1870 nlmsg_cancel(skb, nlh);
1874 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1875 struct xfrm_migrate *m, int num_migrate,
1876 struct xfrm_kmaddress *k)
1878 struct net *net = &init_net;
1879 struct sk_buff *skb;
1881 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
1886 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
1889 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1892 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1893 struct xfrm_migrate *m, int num_migrate,
1894 struct xfrm_kmaddress *k)
1896 return -ENOPROTOOPT;
1900 #define XMSGSIZE(type) sizeof(struct type)
1902 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1903 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1904 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1905 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1906 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1907 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1908 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1909 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1910 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1911 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1912 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1913 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1914 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1915 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1916 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1917 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1918 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1919 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1920 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1921 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1922 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1927 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1928 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
1929 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1930 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1931 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1932 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1933 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1934 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1935 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1936 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1937 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1938 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1939 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1940 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1941 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1942 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1943 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
1946 static struct xfrm_link {
1947 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1948 int (*dump)(struct sk_buff *, struct netlink_callback *);
1949 int (*done)(struct netlink_callback *);
1950 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1951 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1952 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1953 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1954 .dump = xfrm_dump_sa,
1955 .done = xfrm_dump_sa_done },
1956 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1957 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1958 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1959 .dump = xfrm_dump_policy,
1960 .done = xfrm_dump_policy_done },
1961 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1962 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1963 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1964 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1965 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1966 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1967 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1968 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1969 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1970 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1971 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1972 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1973 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1976 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1978 struct net *net = sock_net(skb->sk);
1979 struct nlattr *attrs[XFRMA_MAX+1];
1980 struct xfrm_link *link;
1983 type = nlh->nlmsg_type;
1984 if (type > XFRM_MSG_MAX)
1987 type -= XFRM_MSG_BASE;
1988 link = &xfrm_dispatch[type];
1990 /* All operations require privileges, even GET */
1991 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1994 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1995 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1996 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1997 if (link->dump == NULL)
2000 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
2003 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2008 if (link->doit == NULL)
2011 return link->doit(skb, nlh, attrs);
2014 static void xfrm_netlink_rcv(struct sk_buff *skb)
2016 mutex_lock(&xfrm_cfg_mutex);
2017 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2018 mutex_unlock(&xfrm_cfg_mutex);
2021 static inline size_t xfrm_expire_msgsize(void)
2023 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2026 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2028 struct xfrm_user_expire *ue;
2029 struct nlmsghdr *nlh;
2031 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2035 ue = nlmsg_data(nlh);
2036 copy_to_user_state(x, &ue->state);
2037 ue->hard = (c->data.hard != 0) ? 1 : 0;
2039 return nlmsg_end(skb, nlh);
2042 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2044 struct net *net = &init_net;
2045 struct sk_buff *skb;
2047 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2051 if (build_expire(skb, x, c) < 0)
2054 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2057 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2059 struct net *net = &init_net;
2060 struct sk_buff *skb;
2062 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2066 if (build_aevent(skb, x, c) < 0)
2069 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2072 static int xfrm_notify_sa_flush(struct km_event *c)
2074 struct net *net = &init_net;
2075 struct xfrm_usersa_flush *p;
2076 struct nlmsghdr *nlh;
2077 struct sk_buff *skb;
2078 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2080 skb = nlmsg_new(len, GFP_ATOMIC);
2084 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2090 p = nlmsg_data(nlh);
2091 p->proto = c->data.proto;
2093 nlmsg_end(skb, nlh);
2095 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2098 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2102 l += nla_total_size(aead_len(x->aead));
2104 l += nla_total_size(xfrm_alg_len(x->aalg));
2106 l += nla_total_size(xfrm_alg_len(x->ealg));
2108 l += nla_total_size(sizeof(*x->calg));
2110 l += nla_total_size(sizeof(*x->encap));
2112 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2113 x->security->ctx_len);
2115 l += nla_total_size(sizeof(*x->coaddr));
2117 /* Must count x->lastused as it may become non-zero behind our back. */
2118 l += nla_total_size(sizeof(u64));
2123 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2125 struct net *net = &init_net;
2126 struct xfrm_usersa_info *p;
2127 struct xfrm_usersa_id *id;
2128 struct nlmsghdr *nlh;
2129 struct sk_buff *skb;
2130 int len = xfrm_sa_len(x);
2133 headlen = sizeof(*p);
2134 if (c->event == XFRM_MSG_DELSA) {
2135 len += nla_total_size(headlen);
2136 headlen = sizeof(*id);
2138 len += NLMSG_ALIGN(headlen);
2140 skb = nlmsg_new(len, GFP_ATOMIC);
2144 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2146 goto nla_put_failure;
2148 p = nlmsg_data(nlh);
2149 if (c->event == XFRM_MSG_DELSA) {
2150 struct nlattr *attr;
2152 id = nlmsg_data(nlh);
2153 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2154 id->spi = x->id.spi;
2155 id->family = x->props.family;
2156 id->proto = x->id.proto;
2158 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2160 goto nla_put_failure;
2165 if (copy_to_user_state_extra(x, p, skb))
2166 goto nla_put_failure;
2168 nlmsg_end(skb, nlh);
2170 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2173 /* Somebody screwed up with xfrm_sa_len! */
2179 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2183 case XFRM_MSG_EXPIRE:
2184 return xfrm_exp_state_notify(x, c);
2185 case XFRM_MSG_NEWAE:
2186 return xfrm_aevent_state_notify(x, c);
2187 case XFRM_MSG_DELSA:
2188 case XFRM_MSG_UPDSA:
2189 case XFRM_MSG_NEWSA:
2190 return xfrm_notify_sa(x, c);
2191 case XFRM_MSG_FLUSHSA:
2192 return xfrm_notify_sa_flush(c);
2194 printk("xfrm_user: Unknown SA event %d\n", c->event);
2202 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2203 struct xfrm_policy *xp)
2205 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2206 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2207 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2208 + userpolicy_type_attrsize();
2211 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2212 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2215 struct xfrm_user_acquire *ua;
2216 struct nlmsghdr *nlh;
2217 __u32 seq = xfrm_get_acqseq();
2219 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2223 ua = nlmsg_data(nlh);
2224 memcpy(&ua->id, &x->id, sizeof(ua->id));
2225 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2226 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2227 copy_to_user_policy(xp, &ua->policy, dir);
2228 ua->aalgos = xt->aalgos;
2229 ua->ealgos = xt->ealgos;
2230 ua->calgos = xt->calgos;
2231 ua->seq = x->km.seq = seq;
2233 if (copy_to_user_tmpl(xp, skb) < 0)
2235 if (copy_to_user_state_sec_ctx(x, skb))
2237 if (copy_to_user_policy_type(xp->type, skb) < 0)
2240 return nlmsg_end(skb, nlh);
2243 nlmsg_cancel(skb, nlh);
2247 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2248 struct xfrm_policy *xp, int dir)
2250 struct net *net = xs_net(x);
2251 struct sk_buff *skb;
2253 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2257 if (build_acquire(skb, x, xt, xp, dir) < 0)
2260 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2263 /* User gives us xfrm_user_policy_info followed by an array of 0
2264 * or more templates.
2266 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2267 u8 *data, int len, int *dir)
2269 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2270 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2271 struct xfrm_policy *xp;
2274 switch (sk->sk_family) {
2276 if (opt != IP_XFRM_POLICY) {
2281 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2283 if (opt != IPV6_XFRM_POLICY) {
2296 if (len < sizeof(*p) ||
2297 verify_newpolicy_info(p))
2300 nr = ((len - sizeof(*p)) / sizeof(*ut));
2301 if (validate_tmpl(nr, ut, p->sel.family))
2304 if (p->dir > XFRM_POLICY_OUT)
2307 xp = xfrm_policy_alloc(&init_net, GFP_KERNEL);
2313 copy_from_user_policy(xp, p);
2314 xp->type = XFRM_POLICY_TYPE_MAIN;
2315 copy_templates(xp, ut, nr);
2322 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2324 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2325 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2326 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2327 + userpolicy_type_attrsize();
2330 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2331 int dir, struct km_event *c)
2333 struct xfrm_user_polexpire *upe;
2334 struct nlmsghdr *nlh;
2335 int hard = c->data.hard;
2337 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2341 upe = nlmsg_data(nlh);
2342 copy_to_user_policy(xp, &upe->pol, dir);
2343 if (copy_to_user_tmpl(xp, skb) < 0)
2345 if (copy_to_user_sec_ctx(xp, skb))
2347 if (copy_to_user_policy_type(xp->type, skb) < 0)
2351 return nlmsg_end(skb, nlh);
2354 nlmsg_cancel(skb, nlh);
2358 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2360 struct net *net = &init_net;
2361 struct sk_buff *skb;
2363 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2367 if (build_polexpire(skb, xp, dir, c) < 0)
2370 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2373 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2375 struct net *net = &init_net;
2376 struct xfrm_userpolicy_info *p;
2377 struct xfrm_userpolicy_id *id;
2378 struct nlmsghdr *nlh;
2379 struct sk_buff *skb;
2380 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2383 headlen = sizeof(*p);
2384 if (c->event == XFRM_MSG_DELPOLICY) {
2385 len += nla_total_size(headlen);
2386 headlen = sizeof(*id);
2388 len += userpolicy_type_attrsize();
2389 len += NLMSG_ALIGN(headlen);
2391 skb = nlmsg_new(len, GFP_ATOMIC);
2395 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2399 p = nlmsg_data(nlh);
2400 if (c->event == XFRM_MSG_DELPOLICY) {
2401 struct nlattr *attr;
2403 id = nlmsg_data(nlh);
2404 memset(id, 0, sizeof(*id));
2407 id->index = xp->index;
2409 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2411 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2418 copy_to_user_policy(xp, p, dir);
2419 if (copy_to_user_tmpl(xp, skb) < 0)
2421 if (copy_to_user_policy_type(xp->type, skb) < 0)
2424 nlmsg_end(skb, nlh);
2426 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2433 static int xfrm_notify_policy_flush(struct km_event *c)
2435 struct net *net = &init_net;
2436 struct nlmsghdr *nlh;
2437 struct sk_buff *skb;
2439 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2443 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2446 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2449 nlmsg_end(skb, nlh);
2451 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2458 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2462 case XFRM_MSG_NEWPOLICY:
2463 case XFRM_MSG_UPDPOLICY:
2464 case XFRM_MSG_DELPOLICY:
2465 return xfrm_notify_policy(xp, dir, c);
2466 case XFRM_MSG_FLUSHPOLICY:
2467 return xfrm_notify_policy_flush(c);
2468 case XFRM_MSG_POLEXPIRE:
2469 return xfrm_exp_policy_notify(xp, dir, c);
2471 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2478 static inline size_t xfrm_report_msgsize(void)
2480 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2483 static int build_report(struct sk_buff *skb, u8 proto,
2484 struct xfrm_selector *sel, xfrm_address_t *addr)
2486 struct xfrm_user_report *ur;
2487 struct nlmsghdr *nlh;
2489 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2493 ur = nlmsg_data(nlh);
2495 memcpy(&ur->sel, sel, sizeof(ur->sel));
2498 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2500 return nlmsg_end(skb, nlh);
2503 nlmsg_cancel(skb, nlh);
2507 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2508 xfrm_address_t *addr)
2510 struct net *net = &init_net;
2511 struct sk_buff *skb;
2513 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2517 if (build_report(skb, proto, sel, addr) < 0)
2520 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2523 static inline size_t xfrm_mapping_msgsize(void)
2525 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2528 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2529 xfrm_address_t *new_saddr, __be16 new_sport)
2531 struct xfrm_user_mapping *um;
2532 struct nlmsghdr *nlh;
2534 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2538 um = nlmsg_data(nlh);
2540 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2541 um->id.spi = x->id.spi;
2542 um->id.family = x->props.family;
2543 um->id.proto = x->id.proto;
2544 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2545 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2546 um->new_sport = new_sport;
2547 um->old_sport = x->encap->encap_sport;
2548 um->reqid = x->props.reqid;
2550 return nlmsg_end(skb, nlh);
2553 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2556 struct net *net = xs_net(x);
2557 struct sk_buff *skb;
2559 if (x->id.proto != IPPROTO_ESP)
2565 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2569 if (build_mapping(skb, x, ipaddr, sport) < 0)
2572 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2575 static struct xfrm_mgr netlink_mgr = {
2577 .notify = xfrm_send_state_notify,
2578 .acquire = xfrm_send_acquire,
2579 .compile_policy = xfrm_compile_policy,
2580 .notify_policy = xfrm_send_policy_notify,
2581 .report = xfrm_send_report,
2582 .migrate = xfrm_send_migrate,
2583 .new_mapping = xfrm_send_mapping,
2586 static int __net_init xfrm_user_net_init(struct net *net)
2590 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
2591 xfrm_netlink_rcv, NULL, THIS_MODULE);
2594 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2598 static void __net_exit xfrm_user_net_exit(struct net *net)
2600 struct sock *nlsk = net->xfrm.nlsk;
2602 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2604 netlink_kernel_release(nlsk);
2607 static struct pernet_operations xfrm_user_net_ops = {
2608 .init = xfrm_user_net_init,
2609 .exit = xfrm_user_net_exit,
2612 static int __init xfrm_user_init(void)
2616 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2618 rv = register_pernet_subsys(&xfrm_user_net_ops);
2621 rv = xfrm_register_km(&netlink_mgr);
2623 unregister_pernet_subsys(&xfrm_user_net_ops);
2627 static void __exit xfrm_user_exit(void)
2629 xfrm_unregister_km(&netlink_mgr);
2630 unregister_pernet_subsys(&xfrm_user_net_ops);
2633 module_init(xfrm_user_init);
2634 module_exit(xfrm_user_exit);
2635 MODULE_LICENSE("GPL");
2636 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);