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;
281 x->sel.family = p->family;
286 * someday when pfkey also has support, we could have the code
287 * somehow made shareable and move it to xfrm_state.c - JHS
290 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
292 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
293 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
294 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
295 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
298 struct xfrm_replay_state *replay;
299 replay = nla_data(rp);
300 memcpy(&x->replay, replay, sizeof(*replay));
301 memcpy(&x->preplay, replay, sizeof(*replay));
305 struct xfrm_lifetime_cur *ltime;
306 ltime = nla_data(lt);
307 x->curlft.bytes = ltime->bytes;
308 x->curlft.packets = ltime->packets;
309 x->curlft.add_time = ltime->add_time;
310 x->curlft.use_time = ltime->use_time;
314 x->replay_maxage = nla_get_u32(et);
317 x->replay_maxdiff = nla_get_u32(rt);
320 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
321 struct nlattr **attrs,
324 struct xfrm_state *x = xfrm_state_alloc();
330 copy_from_user_state(x, p);
332 if ((err = attach_aead(&x->aead, &x->props.ealgo,
333 attrs[XFRMA_ALG_AEAD])))
335 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
336 xfrm_aalg_get_byname,
337 attrs[XFRMA_ALG_AUTH])))
339 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
340 xfrm_ealg_get_byname,
341 attrs[XFRMA_ALG_CRYPT])))
343 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
344 xfrm_calg_get_byname,
345 attrs[XFRMA_ALG_COMP])))
348 if (attrs[XFRMA_ENCAP]) {
349 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
350 sizeof(*x->encap), GFP_KERNEL);
351 if (x->encap == NULL)
355 if (attrs[XFRMA_COADDR]) {
356 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
357 sizeof(*x->coaddr), GFP_KERNEL);
358 if (x->coaddr == NULL)
362 err = xfrm_init_state(x);
366 if (attrs[XFRMA_SEC_CTX] &&
367 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
371 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
372 /* sysctl_xfrm_aevent_etime is in 100ms units */
373 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
374 x->preplay.bitmap = 0;
375 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
376 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
378 /* override default values from above */
380 xfrm_update_ae_params(x, attrs);
385 x->km.state = XFRM_STATE_DEAD;
392 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
393 struct nlattr **attrs)
395 struct xfrm_usersa_info *p = nlmsg_data(nlh);
396 struct xfrm_state *x;
399 uid_t loginuid = NETLINK_CB(skb).loginuid;
400 u32 sessionid = NETLINK_CB(skb).sessionid;
401 u32 sid = NETLINK_CB(skb).sid;
403 err = verify_newsa_info(p, attrs);
407 x = xfrm_state_construct(p, attrs, &err);
412 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
413 err = xfrm_state_add(x);
415 err = xfrm_state_update(x);
417 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
420 x->km.state = XFRM_STATE_DEAD;
425 c.seq = nlh->nlmsg_seq;
426 c.pid = nlh->nlmsg_pid;
427 c.event = nlh->nlmsg_type;
429 km_state_notify(x, &c);
435 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
436 struct nlattr **attrs,
439 struct xfrm_state *x = NULL;
442 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
444 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
446 xfrm_address_t *saddr = NULL;
448 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
455 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
465 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
466 struct nlattr **attrs)
468 struct xfrm_state *x;
471 struct xfrm_usersa_id *p = nlmsg_data(nlh);
472 uid_t loginuid = NETLINK_CB(skb).loginuid;
473 u32 sessionid = NETLINK_CB(skb).sessionid;
474 u32 sid = NETLINK_CB(skb).sid;
476 x = xfrm_user_state_lookup(p, attrs, &err);
480 if ((err = security_xfrm_state_delete(x)) != 0)
483 if (xfrm_state_kern(x)) {
488 err = xfrm_state_delete(x);
493 c.seq = nlh->nlmsg_seq;
494 c.pid = nlh->nlmsg_pid;
495 c.event = nlh->nlmsg_type;
496 km_state_notify(x, &c);
499 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
504 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
506 memcpy(&p->id, &x->id, sizeof(p->id));
507 memcpy(&p->sel, &x->sel, sizeof(p->sel));
508 memcpy(&p->lft, &x->lft, sizeof(p->lft));
509 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
510 memcpy(&p->stats, &x->stats, sizeof(p->stats));
511 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
512 p->mode = x->props.mode;
513 p->replay_window = x->props.replay_window;
514 p->reqid = x->props.reqid;
515 p->family = x->props.family;
516 p->flags = x->props.flags;
520 struct xfrm_dump_info {
521 struct sk_buff *in_skb;
522 struct sk_buff *out_skb;
527 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
529 struct xfrm_user_sec_ctx *uctx;
531 int ctx_size = sizeof(*uctx) + s->ctx_len;
533 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
537 uctx = nla_data(attr);
538 uctx->exttype = XFRMA_SEC_CTX;
539 uctx->len = ctx_size;
540 uctx->ctx_doi = s->ctx_doi;
541 uctx->ctx_alg = s->ctx_alg;
542 uctx->ctx_len = s->ctx_len;
543 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
548 /* Don't change this without updating xfrm_sa_len! */
549 static int copy_to_user_state_extra(struct xfrm_state *x,
550 struct xfrm_usersa_info *p,
553 copy_to_user_state(x, p);
556 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
559 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
562 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
564 NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg);
566 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
568 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
571 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
573 if (x->security && copy_sec_ctx(x->security, skb) < 0)
574 goto nla_put_failure;
582 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
584 struct xfrm_dump_info *sp = ptr;
585 struct sk_buff *in_skb = sp->in_skb;
586 struct sk_buff *skb = sp->out_skb;
587 struct xfrm_usersa_info *p;
588 struct nlmsghdr *nlh;
591 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
592 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
598 err = copy_to_user_state_extra(x, p, skb);
600 goto nla_put_failure;
606 nlmsg_cancel(skb, nlh);
610 static int xfrm_dump_sa_done(struct netlink_callback *cb)
612 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
613 xfrm_state_walk_done(walk);
617 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
619 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
620 struct xfrm_dump_info info;
622 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
623 sizeof(cb->args) - sizeof(cb->args[0]));
625 info.in_skb = cb->skb;
627 info.nlmsg_seq = cb->nlh->nlmsg_seq;
628 info.nlmsg_flags = NLM_F_MULTI;
632 xfrm_state_walk_init(walk, 0);
635 (void) xfrm_state_walk(walk, dump_one_state, &info);
640 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
641 struct xfrm_state *x, u32 seq)
643 struct xfrm_dump_info info;
646 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
648 return ERR_PTR(-ENOMEM);
650 info.in_skb = in_skb;
652 info.nlmsg_seq = seq;
653 info.nlmsg_flags = 0;
655 if (dump_one_state(x, 0, &info)) {
663 static inline size_t xfrm_spdinfo_msgsize(void)
665 return NLMSG_ALIGN(4)
666 + nla_total_size(sizeof(struct xfrmu_spdinfo))
667 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
670 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
672 struct xfrmk_spdinfo si;
673 struct xfrmu_spdinfo spc;
674 struct xfrmu_spdhinfo sph;
675 struct nlmsghdr *nlh;
678 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
679 if (nlh == NULL) /* shouldnt really happen ... */
684 xfrm_spd_getinfo(&si);
685 spc.incnt = si.incnt;
686 spc.outcnt = si.outcnt;
687 spc.fwdcnt = si.fwdcnt;
688 spc.inscnt = si.inscnt;
689 spc.outscnt = si.outscnt;
690 spc.fwdscnt = si.fwdscnt;
691 sph.spdhcnt = si.spdhcnt;
692 sph.spdhmcnt = si.spdhmcnt;
694 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
695 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
697 return nlmsg_end(skb, nlh);
700 nlmsg_cancel(skb, nlh);
704 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
705 struct nlattr **attrs)
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(xfrm_nl, 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 sk_buff *r_skb;
761 u32 *flags = nlmsg_data(nlh);
762 u32 spid = NETLINK_CB(skb).pid;
763 u32 seq = nlh->nlmsg_seq;
765 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
769 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
772 return nlmsg_unicast(xfrm_nl, r_skb, spid);
775 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
776 struct nlattr **attrs)
778 struct xfrm_usersa_id *p = nlmsg_data(nlh);
779 struct xfrm_state *x;
780 struct sk_buff *resp_skb;
783 x = xfrm_user_state_lookup(p, attrs, &err);
787 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
788 if (IS_ERR(resp_skb)) {
789 err = PTR_ERR(resp_skb);
791 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
798 static int verify_userspi_info(struct xfrm_userspi_info *p)
800 switch (p->info.id.proto) {
806 /* IPCOMP spi is 16-bits. */
807 if (p->max >= 0x10000)
821 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
822 struct nlattr **attrs)
824 struct xfrm_state *x;
825 struct xfrm_userspi_info *p;
826 struct sk_buff *resp_skb;
827 xfrm_address_t *daddr;
832 err = verify_userspi_info(p);
836 family = p->info.family;
837 daddr = &p->info.id.daddr;
841 x = xfrm_find_acq_byseq(p->info.seq);
842 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
849 x = xfrm_find_acq(p->info.mode, p->info.reqid,
850 p->info.id.proto, daddr,
857 err = xfrm_alloc_spi(x, p->min, p->max);
861 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
862 if (IS_ERR(resp_skb)) {
863 err = PTR_ERR(resp_skb);
867 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
875 static int verify_policy_dir(u8 dir)
879 case XFRM_POLICY_OUT:
880 case XFRM_POLICY_FWD:
890 static int verify_policy_type(u8 type)
893 case XFRM_POLICY_TYPE_MAIN:
894 #ifdef CONFIG_XFRM_SUB_POLICY
895 case XFRM_POLICY_TYPE_SUB:
906 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
910 case XFRM_SHARE_SESSION:
911 case XFRM_SHARE_USER:
912 case XFRM_SHARE_UNIQUE:
920 case XFRM_POLICY_ALLOW:
921 case XFRM_POLICY_BLOCK:
928 switch (p->sel.family) {
933 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
936 return -EAFNOSUPPORT;
943 return verify_policy_dir(p->dir);
946 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
948 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
949 struct xfrm_user_sec_ctx *uctx;
955 return security_xfrm_policy_alloc(&pol->security, uctx);
958 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
964 for (i = 0; i < nr; i++, ut++) {
965 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
967 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
968 memcpy(&t->saddr, &ut->saddr,
969 sizeof(xfrm_address_t));
970 t->reqid = ut->reqid;
972 t->share = ut->share;
973 t->optional = ut->optional;
974 t->aalgos = ut->aalgos;
975 t->ealgos = ut->ealgos;
976 t->calgos = ut->calgos;
977 /* If all masks are ~0, then we allow all algorithms. */
978 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
979 t->encap_family = ut->family;
983 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
987 if (nr > XFRM_MAX_DEPTH)
990 for (i = 0; i < nr; i++) {
991 /* We never validated the ut->family value, so many
992 * applications simply leave it at zero. The check was
993 * never made and ut->family was ignored because all
994 * templates could be assumed to have the same family as
995 * the policy itself. Now that we will have ipv4-in-ipv6
996 * and ipv6-in-ipv4 tunnels, this is no longer true.
999 ut[i].family = family;
1001 switch (ut[i].family) {
1004 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1016 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1018 struct nlattr *rt = attrs[XFRMA_TMPL];
1023 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1024 int nr = nla_len(rt) / sizeof(*utmpl);
1027 err = validate_tmpl(nr, utmpl, pol->family);
1031 copy_templates(pol, utmpl, nr);
1036 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1038 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1039 struct xfrm_userpolicy_type *upt;
1040 u8 type = XFRM_POLICY_TYPE_MAIN;
1048 err = verify_policy_type(type);
1056 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1058 xp->priority = p->priority;
1059 xp->index = p->index;
1060 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1061 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1062 xp->action = p->action;
1063 xp->flags = p->flags;
1064 xp->family = p->sel.family;
1065 /* XXX xp->share = p->share; */
1068 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1070 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1071 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1072 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1073 p->priority = xp->priority;
1074 p->index = xp->index;
1075 p->sel.family = xp->family;
1077 p->action = xp->action;
1078 p->flags = xp->flags;
1079 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1082 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1084 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1092 copy_from_user_policy(xp, p);
1094 err = copy_from_user_policy_type(&xp->type, attrs);
1098 if (!(err = copy_from_user_tmpl(xp, attrs)))
1099 err = copy_from_user_sec_ctx(xp, attrs);
1107 xfrm_policy_destroy(xp);
1111 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1112 struct nlattr **attrs)
1114 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1115 struct xfrm_policy *xp;
1119 uid_t loginuid = NETLINK_CB(skb).loginuid;
1120 u32 sessionid = NETLINK_CB(skb).sessionid;
1121 u32 sid = NETLINK_CB(skb).sid;
1123 err = verify_newpolicy_info(p);
1126 err = verify_sec_ctx_len(attrs);
1130 xp = xfrm_policy_construct(p, attrs, &err);
1134 /* shouldnt excl be based on nlh flags??
1135 * Aha! this is anti-netlink really i.e more pfkey derived
1136 * in netlink excl is a flag and you wouldnt need
1137 * a type XFRM_MSG_UPDPOLICY - JHS */
1138 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1139 err = xfrm_policy_insert(p->dir, xp, excl);
1140 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1143 security_xfrm_policy_free(xp->security);
1148 c.event = nlh->nlmsg_type;
1149 c.seq = nlh->nlmsg_seq;
1150 c.pid = nlh->nlmsg_pid;
1151 km_policy_notify(xp, p->dir, &c);
1158 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1160 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1163 if (xp->xfrm_nr == 0)
1166 for (i = 0; i < xp->xfrm_nr; i++) {
1167 struct xfrm_user_tmpl *up = &vec[i];
1168 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1170 memcpy(&up->id, &kp->id, sizeof(up->id));
1171 up->family = kp->encap_family;
1172 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1173 up->reqid = kp->reqid;
1174 up->mode = kp->mode;
1175 up->share = kp->share;
1176 up->optional = kp->optional;
1177 up->aalgos = kp->aalgos;
1178 up->ealgos = kp->ealgos;
1179 up->calgos = kp->calgos;
1182 return nla_put(skb, XFRMA_TMPL,
1183 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1186 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1189 return copy_sec_ctx(x->security, skb);
1194 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1197 return copy_sec_ctx(xp->security, skb);
1201 static inline size_t userpolicy_type_attrsize(void)
1203 #ifdef CONFIG_XFRM_SUB_POLICY
1204 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1210 #ifdef CONFIG_XFRM_SUB_POLICY
1211 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1213 struct xfrm_userpolicy_type upt = {
1217 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1221 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1227 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1229 struct xfrm_dump_info *sp = ptr;
1230 struct xfrm_userpolicy_info *p;
1231 struct sk_buff *in_skb = sp->in_skb;
1232 struct sk_buff *skb = sp->out_skb;
1233 struct nlmsghdr *nlh;
1235 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1236 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1240 p = nlmsg_data(nlh);
1241 copy_to_user_policy(xp, p, dir);
1242 if (copy_to_user_tmpl(xp, skb) < 0)
1244 if (copy_to_user_sec_ctx(xp, skb))
1246 if (copy_to_user_policy_type(xp->type, skb) < 0)
1249 nlmsg_end(skb, nlh);
1253 nlmsg_cancel(skb, nlh);
1257 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1259 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1261 xfrm_policy_walk_done(walk);
1265 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1267 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1268 struct xfrm_dump_info info;
1270 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1271 sizeof(cb->args) - sizeof(cb->args[0]));
1273 info.in_skb = cb->skb;
1275 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1276 info.nlmsg_flags = NLM_F_MULTI;
1280 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1283 (void) xfrm_policy_walk(walk, dump_one_policy, &info);
1288 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1289 struct xfrm_policy *xp,
1292 struct xfrm_dump_info info;
1293 struct sk_buff *skb;
1295 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1297 return ERR_PTR(-ENOMEM);
1299 info.in_skb = in_skb;
1301 info.nlmsg_seq = seq;
1302 info.nlmsg_flags = 0;
1304 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1312 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1313 struct nlattr **attrs)
1315 struct xfrm_policy *xp;
1316 struct xfrm_userpolicy_id *p;
1317 u8 type = XFRM_POLICY_TYPE_MAIN;
1322 p = nlmsg_data(nlh);
1323 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1325 err = copy_from_user_policy_type(&type, attrs);
1329 err = verify_policy_dir(p->dir);
1334 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1336 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1337 struct xfrm_sec_ctx *ctx;
1339 err = verify_sec_ctx_len(attrs);
1345 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1347 err = security_xfrm_policy_alloc(&ctx, uctx);
1351 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, ctx,
1353 security_xfrm_policy_free(ctx);
1359 struct sk_buff *resp_skb;
1361 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1362 if (IS_ERR(resp_skb)) {
1363 err = PTR_ERR(resp_skb);
1365 err = nlmsg_unicast(xfrm_nl, resp_skb,
1366 NETLINK_CB(skb).pid);
1369 uid_t loginuid = NETLINK_CB(skb).loginuid;
1370 u32 sessionid = NETLINK_CB(skb).sessionid;
1371 u32 sid = NETLINK_CB(skb).sid;
1373 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1379 c.data.byid = p->index;
1380 c.event = nlh->nlmsg_type;
1381 c.seq = nlh->nlmsg_seq;
1382 c.pid = nlh->nlmsg_pid;
1383 km_policy_notify(xp, p->dir, &c);
1391 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1392 struct nlattr **attrs)
1395 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1396 struct xfrm_audit audit_info;
1399 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1400 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1401 audit_info.secid = NETLINK_CB(skb).sid;
1402 err = xfrm_state_flush(p->proto, &audit_info);
1405 c.data.proto = p->proto;
1406 c.event = nlh->nlmsg_type;
1407 c.seq = nlh->nlmsg_seq;
1408 c.pid = nlh->nlmsg_pid;
1409 km_state_notify(NULL, &c);
1414 static inline size_t xfrm_aevent_msgsize(void)
1416 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1417 + nla_total_size(sizeof(struct xfrm_replay_state))
1418 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1419 + nla_total_size(4) /* XFRM_AE_RTHR */
1420 + nla_total_size(4); /* XFRM_AE_ETHR */
1423 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1425 struct xfrm_aevent_id *id;
1426 struct nlmsghdr *nlh;
1428 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1432 id = nlmsg_data(nlh);
1433 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1434 id->sa_id.spi = x->id.spi;
1435 id->sa_id.family = x->props.family;
1436 id->sa_id.proto = x->id.proto;
1437 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1438 id->reqid = x->props.reqid;
1439 id->flags = c->data.aevent;
1441 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1442 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1444 if (id->flags & XFRM_AE_RTHR)
1445 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1447 if (id->flags & XFRM_AE_ETHR)
1448 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1449 x->replay_maxage * 10 / HZ);
1451 return nlmsg_end(skb, nlh);
1454 nlmsg_cancel(skb, nlh);
1458 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1459 struct nlattr **attrs)
1461 struct xfrm_state *x;
1462 struct sk_buff *r_skb;
1465 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1466 struct xfrm_usersa_id *id = &p->sa_id;
1468 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1472 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1479 * XXX: is this lock really needed - none of the other
1480 * gets lock (the concern is things getting updated
1481 * while we are still reading) - jhs
1483 spin_lock_bh(&x->lock);
1484 c.data.aevent = p->flags;
1485 c.seq = nlh->nlmsg_seq;
1486 c.pid = nlh->nlmsg_pid;
1488 if (build_aevent(r_skb, x, &c) < 0)
1490 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1491 spin_unlock_bh(&x->lock);
1496 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1497 struct nlattr **attrs)
1499 struct xfrm_state *x;
1502 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1503 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1504 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1509 /* pedantic mode - thou shalt sayeth replaceth */
1510 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1513 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1517 if (x->km.state != XFRM_STATE_VALID)
1520 spin_lock_bh(&x->lock);
1521 xfrm_update_ae_params(x, attrs);
1522 spin_unlock_bh(&x->lock);
1524 c.event = nlh->nlmsg_type;
1525 c.seq = nlh->nlmsg_seq;
1526 c.pid = nlh->nlmsg_pid;
1527 c.data.aevent = XFRM_AE_CU;
1528 km_state_notify(x, &c);
1535 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1536 struct nlattr **attrs)
1539 u8 type = XFRM_POLICY_TYPE_MAIN;
1541 struct xfrm_audit audit_info;
1543 err = copy_from_user_policy_type(&type, attrs);
1547 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1548 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1549 audit_info.secid = NETLINK_CB(skb).sid;
1550 err = xfrm_policy_flush(type, &audit_info);
1554 c.event = nlh->nlmsg_type;
1555 c.seq = nlh->nlmsg_seq;
1556 c.pid = nlh->nlmsg_pid;
1557 km_policy_notify(NULL, 0, &c);
1561 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1562 struct nlattr **attrs)
1564 struct xfrm_policy *xp;
1565 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1566 struct xfrm_userpolicy_info *p = &up->pol;
1567 u8 type = XFRM_POLICY_TYPE_MAIN;
1570 err = copy_from_user_policy_type(&type, attrs);
1575 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1577 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1578 struct xfrm_sec_ctx *ctx;
1580 err = verify_sec_ctx_len(attrs);
1586 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1588 err = security_xfrm_policy_alloc(&ctx, uctx);
1592 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, ctx, 0, &err);
1593 security_xfrm_policy_free(ctx);
1598 read_lock(&xp->lock);
1600 read_unlock(&xp->lock);
1604 read_unlock(&xp->lock);
1607 uid_t loginuid = NETLINK_CB(skb).loginuid;
1608 uid_t sessionid = NETLINK_CB(skb).sessionid;
1609 u32 sid = NETLINK_CB(skb).sid;
1610 xfrm_policy_delete(xp, p->dir);
1611 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1614 // reset the timers here?
1615 printk("Dont know what to do with soft policy expire\n");
1617 km_policy_expired(xp, p->dir, up->hard, current->pid);
1624 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1625 struct nlattr **attrs)
1627 struct xfrm_state *x;
1629 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1630 struct xfrm_usersa_info *p = &ue->state;
1632 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1638 spin_lock_bh(&x->lock);
1640 if (x->km.state != XFRM_STATE_VALID)
1642 km_state_expired(x, ue->hard, current->pid);
1645 uid_t loginuid = NETLINK_CB(skb).loginuid;
1646 uid_t sessionid = NETLINK_CB(skb).sessionid;
1647 u32 sid = NETLINK_CB(skb).sid;
1648 __xfrm_state_delete(x);
1649 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1653 spin_unlock_bh(&x->lock);
1658 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1659 struct nlattr **attrs)
1661 struct xfrm_policy *xp;
1662 struct xfrm_user_tmpl *ut;
1664 struct nlattr *rt = attrs[XFRMA_TMPL];
1666 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1667 struct xfrm_state *x = xfrm_state_alloc();
1673 err = verify_newpolicy_info(&ua->policy);
1675 printk("BAD policy passed\n");
1681 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
1687 memcpy(&x->id, &ua->id, sizeof(ua->id));
1688 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1689 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1692 /* extract the templates and for each call km_key */
1693 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1694 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1695 memcpy(&x->id, &t->id, sizeof(x->id));
1696 x->props.mode = t->mode;
1697 x->props.reqid = t->reqid;
1698 x->props.family = ut->family;
1699 t->aalgos = ua->aalgos;
1700 t->ealgos = ua->ealgos;
1701 t->calgos = ua->calgos;
1702 err = km_query(x, t, xp);
1712 #ifdef CONFIG_XFRM_MIGRATE
1713 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1714 struct nlattr **attrs, int *num)
1716 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1717 struct xfrm_user_migrate *um;
1721 num_migrate = nla_len(rt) / sizeof(*um);
1723 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1726 for (i = 0; i < num_migrate; i++, um++, ma++) {
1727 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1728 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1729 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1730 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1732 ma->proto = um->proto;
1733 ma->mode = um->mode;
1734 ma->reqid = um->reqid;
1736 ma->old_family = um->old_family;
1737 ma->new_family = um->new_family;
1744 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1745 struct nlattr **attrs)
1747 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1748 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1753 if (attrs[XFRMA_MIGRATE] == NULL)
1756 err = copy_from_user_policy_type(&type, attrs);
1760 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1768 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1773 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1774 struct nlattr **attrs)
1776 return -ENOPROTOOPT;
1780 #ifdef CONFIG_XFRM_MIGRATE
1781 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1783 struct xfrm_user_migrate um;
1785 memset(&um, 0, sizeof(um));
1786 um.proto = m->proto;
1788 um.reqid = m->reqid;
1789 um.old_family = m->old_family;
1790 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1791 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1792 um.new_family = m->new_family;
1793 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1794 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1796 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1799 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1801 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1802 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1803 + userpolicy_type_attrsize();
1806 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1807 int num_migrate, struct xfrm_selector *sel,
1810 struct xfrm_migrate *mp;
1811 struct xfrm_userpolicy_id *pol_id;
1812 struct nlmsghdr *nlh;
1815 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1819 pol_id = nlmsg_data(nlh);
1820 /* copy data from selector, dir, and type to the pol_id */
1821 memset(pol_id, 0, sizeof(*pol_id));
1822 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1825 if (copy_to_user_policy_type(type, skb) < 0)
1828 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1829 if (copy_to_user_migrate(mp, skb) < 0)
1833 return nlmsg_end(skb, nlh);
1835 nlmsg_cancel(skb, nlh);
1839 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1840 struct xfrm_migrate *m, int num_migrate)
1842 struct sk_buff *skb;
1844 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1849 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1852 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1855 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1856 struct xfrm_migrate *m, int num_migrate)
1858 return -ENOPROTOOPT;
1862 #define XMSGSIZE(type) sizeof(struct type)
1864 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1865 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1866 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1867 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1868 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1869 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1870 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1871 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1872 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1873 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1874 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1875 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1876 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1877 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1878 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1879 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1880 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1881 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1882 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1883 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1884 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1889 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1890 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
1891 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1892 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1893 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1894 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1895 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1896 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1897 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1898 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1899 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1900 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1901 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1902 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1903 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1904 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1907 static struct xfrm_link {
1908 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1909 int (*dump)(struct sk_buff *, struct netlink_callback *);
1910 int (*done)(struct netlink_callback *);
1911 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1912 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1913 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1914 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1915 .dump = xfrm_dump_sa,
1916 .done = xfrm_dump_sa_done },
1917 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1918 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1919 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1920 .dump = xfrm_dump_policy,
1921 .done = xfrm_dump_policy_done },
1922 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1923 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1924 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1925 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1926 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1927 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1928 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1929 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1930 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1931 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1932 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1933 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1934 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1937 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1939 struct nlattr *attrs[XFRMA_MAX+1];
1940 struct xfrm_link *link;
1943 type = nlh->nlmsg_type;
1944 if (type > XFRM_MSG_MAX)
1947 type -= XFRM_MSG_BASE;
1948 link = &xfrm_dispatch[type];
1950 /* All operations require privileges, even GET */
1951 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1954 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1955 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1956 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1957 if (link->dump == NULL)
1960 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, link->done);
1963 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
1968 if (link->doit == NULL)
1971 return link->doit(skb, nlh, attrs);
1974 static void xfrm_netlink_rcv(struct sk_buff *skb)
1976 mutex_lock(&xfrm_cfg_mutex);
1977 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
1978 mutex_unlock(&xfrm_cfg_mutex);
1981 static inline size_t xfrm_expire_msgsize(void)
1983 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1986 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1988 struct xfrm_user_expire *ue;
1989 struct nlmsghdr *nlh;
1991 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1995 ue = nlmsg_data(nlh);
1996 copy_to_user_state(x, &ue->state);
1997 ue->hard = (c->data.hard != 0) ? 1 : 0;
1999 return nlmsg_end(skb, nlh);
2002 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2004 struct sk_buff *skb;
2006 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2010 if (build_expire(skb, x, c) < 0)
2013 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2016 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2018 struct sk_buff *skb;
2020 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2024 if (build_aevent(skb, x, c) < 0)
2027 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2030 static int xfrm_notify_sa_flush(struct km_event *c)
2032 struct xfrm_usersa_flush *p;
2033 struct nlmsghdr *nlh;
2034 struct sk_buff *skb;
2035 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2037 skb = nlmsg_new(len, GFP_ATOMIC);
2041 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2047 p = nlmsg_data(nlh);
2048 p->proto = c->data.proto;
2050 nlmsg_end(skb, nlh);
2052 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2055 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2059 l += nla_total_size(aead_len(x->aead));
2061 l += nla_total_size(xfrm_alg_len(x->aalg));
2063 l += nla_total_size(xfrm_alg_len(x->ealg));
2065 l += nla_total_size(sizeof(*x->calg));
2067 l += nla_total_size(sizeof(*x->encap));
2069 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2070 x->security->ctx_len);
2072 l += nla_total_size(sizeof(*x->coaddr));
2074 /* Must count x->lastused as it may become non-zero behind our back. */
2075 l += nla_total_size(sizeof(u64));
2080 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2082 struct xfrm_usersa_info *p;
2083 struct xfrm_usersa_id *id;
2084 struct nlmsghdr *nlh;
2085 struct sk_buff *skb;
2086 int len = xfrm_sa_len(x);
2089 headlen = sizeof(*p);
2090 if (c->event == XFRM_MSG_DELSA) {
2091 len += nla_total_size(headlen);
2092 headlen = sizeof(*id);
2094 len += NLMSG_ALIGN(headlen);
2096 skb = nlmsg_new(len, GFP_ATOMIC);
2100 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2102 goto nla_put_failure;
2104 p = nlmsg_data(nlh);
2105 if (c->event == XFRM_MSG_DELSA) {
2106 struct nlattr *attr;
2108 id = nlmsg_data(nlh);
2109 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2110 id->spi = x->id.spi;
2111 id->family = x->props.family;
2112 id->proto = x->id.proto;
2114 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2116 goto nla_put_failure;
2121 if (copy_to_user_state_extra(x, p, skb))
2122 goto nla_put_failure;
2124 nlmsg_end(skb, nlh);
2126 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2129 /* Somebody screwed up with xfrm_sa_len! */
2135 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2139 case XFRM_MSG_EXPIRE:
2140 return xfrm_exp_state_notify(x, c);
2141 case XFRM_MSG_NEWAE:
2142 return xfrm_aevent_state_notify(x, c);
2143 case XFRM_MSG_DELSA:
2144 case XFRM_MSG_UPDSA:
2145 case XFRM_MSG_NEWSA:
2146 return xfrm_notify_sa(x, c);
2147 case XFRM_MSG_FLUSHSA:
2148 return xfrm_notify_sa_flush(c);
2150 printk("xfrm_user: Unknown SA event %d\n", c->event);
2158 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2159 struct xfrm_policy *xp)
2161 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2162 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2163 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2164 + userpolicy_type_attrsize();
2167 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2168 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2171 struct xfrm_user_acquire *ua;
2172 struct nlmsghdr *nlh;
2173 __u32 seq = xfrm_get_acqseq();
2175 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2179 ua = nlmsg_data(nlh);
2180 memcpy(&ua->id, &x->id, sizeof(ua->id));
2181 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2182 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2183 copy_to_user_policy(xp, &ua->policy, dir);
2184 ua->aalgos = xt->aalgos;
2185 ua->ealgos = xt->ealgos;
2186 ua->calgos = xt->calgos;
2187 ua->seq = x->km.seq = seq;
2189 if (copy_to_user_tmpl(xp, skb) < 0)
2191 if (copy_to_user_state_sec_ctx(x, skb))
2193 if (copy_to_user_policy_type(xp->type, skb) < 0)
2196 return nlmsg_end(skb, nlh);
2199 nlmsg_cancel(skb, nlh);
2203 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2204 struct xfrm_policy *xp, int dir)
2206 struct sk_buff *skb;
2208 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2212 if (build_acquire(skb, x, xt, xp, dir) < 0)
2215 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2218 /* User gives us xfrm_user_policy_info followed by an array of 0
2219 * or more templates.
2221 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2222 u8 *data, int len, int *dir)
2224 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2225 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2226 struct xfrm_policy *xp;
2229 switch (sk->sk_family) {
2231 if (opt != IP_XFRM_POLICY) {
2236 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2238 if (opt != IPV6_XFRM_POLICY) {
2251 if (len < sizeof(*p) ||
2252 verify_newpolicy_info(p))
2255 nr = ((len - sizeof(*p)) / sizeof(*ut));
2256 if (validate_tmpl(nr, ut, p->sel.family))
2259 if (p->dir > XFRM_POLICY_OUT)
2262 xp = xfrm_policy_alloc(GFP_KERNEL);
2268 copy_from_user_policy(xp, p);
2269 xp->type = XFRM_POLICY_TYPE_MAIN;
2270 copy_templates(xp, ut, nr);
2277 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2279 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2280 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2281 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2282 + userpolicy_type_attrsize();
2285 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2286 int dir, struct km_event *c)
2288 struct xfrm_user_polexpire *upe;
2289 struct nlmsghdr *nlh;
2290 int hard = c->data.hard;
2292 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2296 upe = nlmsg_data(nlh);
2297 copy_to_user_policy(xp, &upe->pol, dir);
2298 if (copy_to_user_tmpl(xp, skb) < 0)
2300 if (copy_to_user_sec_ctx(xp, skb))
2302 if (copy_to_user_policy_type(xp->type, skb) < 0)
2306 return nlmsg_end(skb, nlh);
2309 nlmsg_cancel(skb, nlh);
2313 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2315 struct sk_buff *skb;
2317 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2321 if (build_polexpire(skb, xp, dir, c) < 0)
2324 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2327 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2329 struct xfrm_userpolicy_info *p;
2330 struct xfrm_userpolicy_id *id;
2331 struct nlmsghdr *nlh;
2332 struct sk_buff *skb;
2333 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2336 headlen = sizeof(*p);
2337 if (c->event == XFRM_MSG_DELPOLICY) {
2338 len += nla_total_size(headlen);
2339 headlen = sizeof(*id);
2341 len += userpolicy_type_attrsize();
2342 len += NLMSG_ALIGN(headlen);
2344 skb = nlmsg_new(len, GFP_ATOMIC);
2348 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2352 p = nlmsg_data(nlh);
2353 if (c->event == XFRM_MSG_DELPOLICY) {
2354 struct nlattr *attr;
2356 id = nlmsg_data(nlh);
2357 memset(id, 0, sizeof(*id));
2360 id->index = xp->index;
2362 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2364 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2371 copy_to_user_policy(xp, p, dir);
2372 if (copy_to_user_tmpl(xp, skb) < 0)
2374 if (copy_to_user_policy_type(xp->type, skb) < 0)
2377 nlmsg_end(skb, nlh);
2379 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2386 static int xfrm_notify_policy_flush(struct km_event *c)
2388 struct nlmsghdr *nlh;
2389 struct sk_buff *skb;
2391 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2395 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2398 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2401 nlmsg_end(skb, nlh);
2403 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2410 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2414 case XFRM_MSG_NEWPOLICY:
2415 case XFRM_MSG_UPDPOLICY:
2416 case XFRM_MSG_DELPOLICY:
2417 return xfrm_notify_policy(xp, dir, c);
2418 case XFRM_MSG_FLUSHPOLICY:
2419 return xfrm_notify_policy_flush(c);
2420 case XFRM_MSG_POLEXPIRE:
2421 return xfrm_exp_policy_notify(xp, dir, c);
2423 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2430 static inline size_t xfrm_report_msgsize(void)
2432 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2435 static int build_report(struct sk_buff *skb, u8 proto,
2436 struct xfrm_selector *sel, xfrm_address_t *addr)
2438 struct xfrm_user_report *ur;
2439 struct nlmsghdr *nlh;
2441 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2445 ur = nlmsg_data(nlh);
2447 memcpy(&ur->sel, sel, sizeof(ur->sel));
2450 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2452 return nlmsg_end(skb, nlh);
2455 nlmsg_cancel(skb, nlh);
2459 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2460 xfrm_address_t *addr)
2462 struct sk_buff *skb;
2464 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2468 if (build_report(skb, proto, sel, addr) < 0)
2471 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2474 static struct xfrm_mgr netlink_mgr = {
2476 .notify = xfrm_send_state_notify,
2477 .acquire = xfrm_send_acquire,
2478 .compile_policy = xfrm_compile_policy,
2479 .notify_policy = xfrm_send_policy_notify,
2480 .report = xfrm_send_report,
2481 .migrate = xfrm_send_migrate,
2484 static int __init xfrm_user_init(void)
2488 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2490 nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,
2491 xfrm_netlink_rcv, NULL, THIS_MODULE);
2494 rcu_assign_pointer(xfrm_nl, nlsk);
2496 xfrm_register_km(&netlink_mgr);
2501 static void __exit xfrm_user_exit(void)
2503 struct sock *nlsk = xfrm_nl;
2505 xfrm_unregister_km(&netlink_mgr);
2506 rcu_assign_pointer(xfrm_nl, NULL);
2508 netlink_kernel_release(nlsk);
2511 module_init(xfrm_user_init);
2512 module_exit(xfrm_user_exit);
2513 MODULE_LICENSE("GPL");
2514 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);