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/rtnetlink.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
30 #include <asm/uaccess.h>
31 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32 #include <linux/in6.h>
34 #include <linux/audit.h>
36 static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
38 struct rtattr *rt = xfrma[type - 1];
39 struct xfrm_algo *algp;
45 len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp);
51 len -= (algp->alg_key_len + 7U) / 8;
57 if (!algp->alg_key_len &&
58 strcmp(algp->alg_name, "digest_null") != 0)
63 if (!algp->alg_key_len &&
64 strcmp(algp->alg_name, "cipher_null") != 0)
69 /* Zero length keys are legal. */
76 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
80 static int verify_encap_tmpl(struct rtattr **xfrma)
82 struct rtattr *rt = xfrma[XFRMA_ENCAP - 1];
83 struct xfrm_encap_tmpl *encap;
88 if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap))
94 static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
97 struct rtattr *rt = xfrma[type - 1];
102 if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
106 *addrp = RTA_DATA(rt);
111 static inline int verify_sec_ctx_len(struct rtattr **xfrma)
113 struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
114 struct xfrm_user_sec_ctx *uctx;
120 if (rt->rta_len < sizeof(*uctx))
125 len += sizeof(struct xfrm_user_sec_ctx);
126 len += uctx->ctx_len;
128 if (uctx->len != len)
135 static int verify_newsa_info(struct xfrm_usersa_info *p,
136 struct rtattr **xfrma)
146 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
158 switch (p->id.proto) {
160 if (!xfrma[XFRMA_ALG_AUTH-1] ||
161 xfrma[XFRMA_ALG_CRYPT-1] ||
162 xfrma[XFRMA_ALG_COMP-1])
167 if ((!xfrma[XFRMA_ALG_AUTH-1] &&
168 !xfrma[XFRMA_ALG_CRYPT-1]) ||
169 xfrma[XFRMA_ALG_COMP-1])
174 if (!xfrma[XFRMA_ALG_COMP-1] ||
175 xfrma[XFRMA_ALG_AUTH-1] ||
176 xfrma[XFRMA_ALG_CRYPT-1])
180 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
181 case IPPROTO_DSTOPTS:
182 case IPPROTO_ROUTING:
183 if (xfrma[XFRMA_ALG_COMP-1] ||
184 xfrma[XFRMA_ALG_AUTH-1] ||
185 xfrma[XFRMA_ALG_CRYPT-1] ||
186 xfrma[XFRMA_ENCAP-1] ||
187 xfrma[XFRMA_SEC_CTX-1] ||
188 !xfrma[XFRMA_COADDR-1])
197 if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH)))
199 if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT)))
201 if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP)))
203 if ((err = verify_encap_tmpl(xfrma)))
205 if ((err = verify_sec_ctx_len(xfrma)))
207 if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
212 case XFRM_MODE_TRANSPORT:
213 case XFRM_MODE_TUNNEL:
214 case XFRM_MODE_ROUTEOPTIMIZATION:
228 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
229 struct xfrm_algo_desc *(*get_byname)(char *, int),
230 struct rtattr *u_arg)
232 struct rtattr *rta = u_arg;
233 struct xfrm_algo *p, *ualg;
234 struct xfrm_algo_desc *algo;
240 ualg = RTA_DATA(rta);
242 algo = get_byname(ualg->alg_name, 1);
245 *props = algo->desc.sadb_alg_id;
247 len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
248 p = kmemdup(ualg, len, GFP_KERNEL);
252 strcpy(p->alg_name, algo->name);
257 static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
259 struct rtattr *rta = u_arg;
260 struct xfrm_encap_tmpl *p, *uencap;
265 uencap = RTA_DATA(rta);
266 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
275 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
280 len += sizeof(struct xfrm_user_sec_ctx);
281 len += xfrm_ctx->ctx_len;
286 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
288 struct xfrm_user_sec_ctx *uctx;
293 uctx = RTA_DATA(u_arg);
294 return security_xfrm_state_alloc(x, uctx);
297 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
299 struct rtattr *rta = u_arg;
300 xfrm_address_t *p, *uaddrp;
305 uaddrp = RTA_DATA(rta);
306 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
314 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
316 memcpy(&x->id, &p->id, sizeof(x->id));
317 memcpy(&x->sel, &p->sel, sizeof(x->sel));
318 memcpy(&x->lft, &p->lft, sizeof(x->lft));
319 x->props.mode = p->mode;
320 x->props.replay_window = p->replay_window;
321 x->props.reqid = p->reqid;
322 x->props.family = p->family;
323 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
324 x->props.flags = p->flags;
327 * Set inner address family if the KM left it as zero.
328 * See comment in validate_tmpl.
331 x->sel.family = p->family;
335 * someday when pfkey also has support, we could have the code
336 * somehow made shareable and move it to xfrm_state.c - JHS
339 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
342 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
343 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
344 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
345 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
348 struct xfrm_replay_state *replay;
349 if (RTA_PAYLOAD(rp) < sizeof(*replay))
351 replay = RTA_DATA(rp);
352 memcpy(&x->replay, replay, sizeof(*replay));
353 memcpy(&x->preplay, replay, sizeof(*replay));
357 struct xfrm_lifetime_cur *ltime;
358 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
360 ltime = RTA_DATA(lt);
361 x->curlft.bytes = ltime->bytes;
362 x->curlft.packets = ltime->packets;
363 x->curlft.add_time = ltime->add_time;
364 x->curlft.use_time = ltime->use_time;
368 if (RTA_PAYLOAD(et) < sizeof(u32))
370 x->replay_maxage = *(u32*)RTA_DATA(et);
374 if (RTA_PAYLOAD(rt) < sizeof(u32))
376 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
384 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
385 struct rtattr **xfrma,
388 struct xfrm_state *x = xfrm_state_alloc();
394 copy_from_user_state(x, p);
396 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
397 xfrm_aalg_get_byname,
398 xfrma[XFRMA_ALG_AUTH-1])))
400 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
401 xfrm_ealg_get_byname,
402 xfrma[XFRMA_ALG_CRYPT-1])))
404 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
405 xfrm_calg_get_byname,
406 xfrma[XFRMA_ALG_COMP-1])))
408 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
410 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
412 err = xfrm_init_state(x);
416 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
420 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
421 /* sysctl_xfrm_aevent_etime is in 100ms units */
422 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
423 x->preplay.bitmap = 0;
424 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
425 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
427 /* override default values from above */
429 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
436 x->km.state = XFRM_STATE_DEAD;
443 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
444 struct rtattr **xfrma)
446 struct xfrm_usersa_info *p = nlmsg_data(nlh);
447 struct xfrm_state *x;
451 err = verify_newsa_info(p, xfrma);
455 x = xfrm_state_construct(p, xfrma, &err);
460 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
461 err = xfrm_state_add(x);
463 err = xfrm_state_update(x);
465 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
466 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
469 x->km.state = XFRM_STATE_DEAD;
474 c.seq = nlh->nlmsg_seq;
475 c.pid = nlh->nlmsg_pid;
476 c.event = nlh->nlmsg_type;
478 km_state_notify(x, &c);
484 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
485 struct rtattr **xfrma,
488 struct xfrm_state *x = NULL;
491 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
493 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
495 xfrm_address_t *saddr = NULL;
497 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
507 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
517 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
518 struct rtattr **xfrma)
520 struct xfrm_state *x;
523 struct xfrm_usersa_id *p = nlmsg_data(nlh);
525 x = xfrm_user_state_lookup(p, xfrma, &err);
529 if ((err = security_xfrm_state_delete(x)) != 0)
532 if (xfrm_state_kern(x)) {
537 err = xfrm_state_delete(x);
542 c.seq = nlh->nlmsg_seq;
543 c.pid = nlh->nlmsg_pid;
544 c.event = nlh->nlmsg_type;
545 km_state_notify(x, &c);
548 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
549 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
554 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
556 memcpy(&p->id, &x->id, sizeof(p->id));
557 memcpy(&p->sel, &x->sel, sizeof(p->sel));
558 memcpy(&p->lft, &x->lft, sizeof(p->lft));
559 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
560 memcpy(&p->stats, &x->stats, sizeof(p->stats));
561 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
562 p->mode = x->props.mode;
563 p->replay_window = x->props.replay_window;
564 p->reqid = x->props.reqid;
565 p->family = x->props.family;
566 p->flags = x->props.flags;
570 struct xfrm_dump_info {
571 struct sk_buff *in_skb;
572 struct sk_buff *out_skb;
579 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
581 struct xfrm_dump_info *sp = ptr;
582 struct sk_buff *in_skb = sp->in_skb;
583 struct sk_buff *skb = sp->out_skb;
584 struct xfrm_usersa_info *p;
585 struct nlmsghdr *nlh;
587 if (sp->this_idx < sp->start_idx)
590 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
591 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
596 copy_to_user_state(x, p);
599 RTA_PUT(skb, XFRMA_ALG_AUTH,
600 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
602 RTA_PUT(skb, XFRMA_ALG_CRYPT,
603 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
605 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
608 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
611 int ctx_size = sizeof(struct xfrm_sec_ctx) +
612 x->security->ctx_len;
613 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
614 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
616 uctx->exttype = XFRMA_SEC_CTX;
617 uctx->len = ctx_size;
618 uctx->ctx_doi = x->security->ctx_doi;
619 uctx->ctx_alg = x->security->ctx_alg;
620 uctx->ctx_len = x->security->ctx_len;
621 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
625 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
628 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
636 nlmsg_cancel(skb, nlh);
640 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
642 struct xfrm_dump_info info;
644 info.in_skb = cb->skb;
646 info.nlmsg_seq = cb->nlh->nlmsg_seq;
647 info.nlmsg_flags = NLM_F_MULTI;
649 info.start_idx = cb->args[0];
650 (void) xfrm_state_walk(0, dump_one_state, &info);
651 cb->args[0] = info.this_idx;
656 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
657 struct xfrm_state *x, u32 seq)
659 struct xfrm_dump_info info;
662 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
664 return ERR_PTR(-ENOMEM);
666 info.in_skb = in_skb;
668 info.nlmsg_seq = seq;
669 info.nlmsg_flags = 0;
670 info.this_idx = info.start_idx = 0;
672 if (dump_one_state(x, 0, &info)) {
680 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
682 struct xfrmk_spdinfo si;
683 struct xfrmu_spdinfo spc;
684 struct xfrmu_spdhinfo sph;
685 struct nlmsghdr *nlh;
688 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
689 if (nlh == NULL) /* shouldnt really happen ... */
694 xfrm_spd_getinfo(&si);
695 spc.incnt = si.incnt;
696 spc.outcnt = si.outcnt;
697 spc.fwdcnt = si.fwdcnt;
698 spc.inscnt = si.inscnt;
699 spc.outscnt = si.outscnt;
700 spc.fwdscnt = si.fwdscnt;
701 sph.spdhcnt = si.spdhcnt;
702 sph.spdhmcnt = si.spdhmcnt;
704 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
705 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
707 return nlmsg_end(skb, nlh);
710 nlmsg_cancel(skb, nlh);
714 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
715 struct rtattr **xfrma)
717 struct sk_buff *r_skb;
718 u32 *flags = nlmsg_data(nlh);
719 u32 spid = NETLINK_CB(skb).pid;
720 u32 seq = nlh->nlmsg_seq;
721 int len = NLMSG_LENGTH(sizeof(u32));
723 len += RTA_SPACE(sizeof(struct xfrmu_spdinfo));
724 len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo));
726 r_skb = alloc_skb(len, GFP_ATOMIC);
730 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
733 return nlmsg_unicast(xfrm_nl, r_skb, spid);
736 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
738 struct xfrmk_sadinfo si;
739 struct xfrmu_sadhinfo sh;
740 struct nlmsghdr *nlh;
743 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
744 if (nlh == NULL) /* shouldnt really happen ... */
749 xfrm_sad_getinfo(&si);
751 sh.sadhmcnt = si.sadhmcnt;
752 sh.sadhcnt = si.sadhcnt;
754 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
755 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
757 return nlmsg_end(skb, nlh);
760 nlmsg_cancel(skb, nlh);
764 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
765 struct rtattr **xfrma)
767 struct sk_buff *r_skb;
768 u32 *flags = nlmsg_data(nlh);
769 u32 spid = NETLINK_CB(skb).pid;
770 u32 seq = nlh->nlmsg_seq;
771 int len = NLMSG_LENGTH(sizeof(u32));
773 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
774 len += RTA_SPACE(sizeof(u32));
776 r_skb = alloc_skb(len, GFP_ATOMIC);
781 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
784 return nlmsg_unicast(xfrm_nl, r_skb, spid);
787 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
788 struct rtattr **xfrma)
790 struct xfrm_usersa_id *p = nlmsg_data(nlh);
791 struct xfrm_state *x;
792 struct sk_buff *resp_skb;
795 x = xfrm_user_state_lookup(p, xfrma, &err);
799 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
800 if (IS_ERR(resp_skb)) {
801 err = PTR_ERR(resp_skb);
803 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
810 static int verify_userspi_info(struct xfrm_userspi_info *p)
812 switch (p->info.id.proto) {
818 /* IPCOMP spi is 16-bits. */
819 if (p->max >= 0x10000)
833 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
834 struct rtattr **xfrma)
836 struct xfrm_state *x;
837 struct xfrm_userspi_info *p;
838 struct sk_buff *resp_skb;
839 xfrm_address_t *daddr;
844 err = verify_userspi_info(p);
848 family = p->info.family;
849 daddr = &p->info.id.daddr;
853 x = xfrm_find_acq_byseq(p->info.seq);
854 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
861 x = xfrm_find_acq(p->info.mode, p->info.reqid,
862 p->info.id.proto, daddr,
869 resp_skb = ERR_PTR(-ENOENT);
871 spin_lock_bh(&x->lock);
872 if (x->km.state != XFRM_STATE_DEAD) {
873 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
875 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
877 spin_unlock_bh(&x->lock);
879 if (IS_ERR(resp_skb)) {
880 err = PTR_ERR(resp_skb);
884 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
892 static int verify_policy_dir(u8 dir)
896 case XFRM_POLICY_OUT:
897 case XFRM_POLICY_FWD:
907 static int verify_policy_type(u8 type)
910 case XFRM_POLICY_TYPE_MAIN:
911 #ifdef CONFIG_XFRM_SUB_POLICY
912 case XFRM_POLICY_TYPE_SUB:
923 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
927 case XFRM_SHARE_SESSION:
928 case XFRM_SHARE_USER:
929 case XFRM_SHARE_UNIQUE:
937 case XFRM_POLICY_ALLOW:
938 case XFRM_POLICY_BLOCK:
945 switch (p->sel.family) {
950 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
953 return -EAFNOSUPPORT;
960 return verify_policy_dir(p->dir);
963 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
965 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
966 struct xfrm_user_sec_ctx *uctx;
972 return security_xfrm_policy_alloc(pol, uctx);
975 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
981 for (i = 0; i < nr; i++, ut++) {
982 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
984 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
985 memcpy(&t->saddr, &ut->saddr,
986 sizeof(xfrm_address_t));
987 t->reqid = ut->reqid;
989 t->share = ut->share;
990 t->optional = ut->optional;
991 t->aalgos = ut->aalgos;
992 t->ealgos = ut->ealgos;
993 t->calgos = ut->calgos;
994 t->encap_family = ut->family;
998 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1002 if (nr > XFRM_MAX_DEPTH)
1005 for (i = 0; i < nr; i++) {
1006 /* We never validated the ut->family value, so many
1007 * applications simply leave it at zero. The check was
1008 * never made and ut->family was ignored because all
1009 * templates could be assumed to have the same family as
1010 * the policy itself. Now that we will have ipv4-in-ipv6
1011 * and ipv6-in-ipv4 tunnels, this is no longer true.
1014 ut[i].family = family;
1016 switch (ut[i].family) {
1019 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1031 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1033 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1038 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1039 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1042 err = validate_tmpl(nr, utmpl, pol->family);
1046 copy_templates(pol, RTA_DATA(rt), nr);
1051 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1053 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1054 struct xfrm_userpolicy_type *upt;
1055 u8 type = XFRM_POLICY_TYPE_MAIN;
1059 if (rt->rta_len < sizeof(*upt))
1066 err = verify_policy_type(type);
1074 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1076 xp->priority = p->priority;
1077 xp->index = p->index;
1078 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1079 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1080 xp->action = p->action;
1081 xp->flags = p->flags;
1082 xp->family = p->sel.family;
1083 /* XXX xp->share = p->share; */
1086 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1088 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1089 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1090 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1091 p->priority = xp->priority;
1092 p->index = xp->index;
1093 p->sel.family = xp->family;
1095 p->action = xp->action;
1096 p->flags = xp->flags;
1097 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1100 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1102 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1110 copy_from_user_policy(xp, p);
1112 err = copy_from_user_policy_type(&xp->type, xfrma);
1116 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1117 err = copy_from_user_sec_ctx(xp, xfrma);
1128 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1129 struct rtattr **xfrma)
1131 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1132 struct xfrm_policy *xp;
1137 err = verify_newpolicy_info(p);
1140 err = verify_sec_ctx_len(xfrma);
1144 xp = xfrm_policy_construct(p, xfrma, &err);
1148 /* shouldnt excl be based on nlh flags??
1149 * Aha! this is anti-netlink really i.e more pfkey derived
1150 * in netlink excl is a flag and you wouldnt need
1151 * a type XFRM_MSG_UPDPOLICY - JHS */
1152 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1153 err = xfrm_policy_insert(p->dir, xp, excl);
1154 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1155 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1158 security_xfrm_policy_free(xp);
1163 c.event = nlh->nlmsg_type;
1164 c.seq = nlh->nlmsg_seq;
1165 c.pid = nlh->nlmsg_pid;
1166 km_policy_notify(xp, p->dir, &c);
1173 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1175 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1178 if (xp->xfrm_nr == 0)
1181 for (i = 0; i < xp->xfrm_nr; i++) {
1182 struct xfrm_user_tmpl *up = &vec[i];
1183 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1185 memcpy(&up->id, &kp->id, sizeof(up->id));
1186 up->family = kp->encap_family;
1187 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1188 up->reqid = kp->reqid;
1189 up->mode = kp->mode;
1190 up->share = kp->share;
1191 up->optional = kp->optional;
1192 up->aalgos = kp->aalgos;
1193 up->ealgos = kp->ealgos;
1194 up->calgos = kp->calgos;
1196 RTA_PUT(skb, XFRMA_TMPL,
1197 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1206 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1208 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1209 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1210 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1212 uctx->exttype = XFRMA_SEC_CTX;
1213 uctx->len = ctx_size;
1214 uctx->ctx_doi = s->ctx_doi;
1215 uctx->ctx_alg = s->ctx_alg;
1216 uctx->ctx_len = s->ctx_len;
1217 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1224 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1227 return copy_sec_ctx(x->security, skb);
1232 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1235 return copy_sec_ctx(xp->security, skb);
1240 #ifdef CONFIG_XFRM_SUB_POLICY
1241 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1243 struct xfrm_userpolicy_type upt;
1245 memset(&upt, 0, sizeof(upt));
1248 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1257 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1263 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1265 struct xfrm_dump_info *sp = ptr;
1266 struct xfrm_userpolicy_info *p;
1267 struct sk_buff *in_skb = sp->in_skb;
1268 struct sk_buff *skb = sp->out_skb;
1269 struct nlmsghdr *nlh;
1271 if (sp->this_idx < sp->start_idx)
1274 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1275 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1279 p = nlmsg_data(nlh);
1280 copy_to_user_policy(xp, p, dir);
1281 if (copy_to_user_tmpl(xp, skb) < 0)
1283 if (copy_to_user_sec_ctx(xp, skb))
1285 if (copy_to_user_policy_type(xp->type, skb) < 0)
1288 nlmsg_end(skb, nlh);
1294 nlmsg_cancel(skb, nlh);
1298 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1300 struct xfrm_dump_info info;
1302 info.in_skb = cb->skb;
1304 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1305 info.nlmsg_flags = NLM_F_MULTI;
1307 info.start_idx = cb->args[0];
1308 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1309 #ifdef CONFIG_XFRM_SUB_POLICY
1310 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1312 cb->args[0] = info.this_idx;
1317 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1318 struct xfrm_policy *xp,
1321 struct xfrm_dump_info info;
1322 struct sk_buff *skb;
1324 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1326 return ERR_PTR(-ENOMEM);
1328 info.in_skb = in_skb;
1330 info.nlmsg_seq = seq;
1331 info.nlmsg_flags = 0;
1332 info.this_idx = info.start_idx = 0;
1334 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1342 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1343 struct rtattr **xfrma)
1345 struct xfrm_policy *xp;
1346 struct xfrm_userpolicy_id *p;
1347 u8 type = XFRM_POLICY_TYPE_MAIN;
1352 p = nlmsg_data(nlh);
1353 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1355 err = copy_from_user_policy_type(&type, xfrma);
1359 err = verify_policy_dir(p->dir);
1364 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1366 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1367 struct xfrm_policy tmp;
1369 err = verify_sec_ctx_len(xfrma);
1373 memset(&tmp, 0, sizeof(struct xfrm_policy));
1375 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1377 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1380 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1382 security_xfrm_policy_free(&tmp);
1388 struct sk_buff *resp_skb;
1390 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1391 if (IS_ERR(resp_skb)) {
1392 err = PTR_ERR(resp_skb);
1394 err = nlmsg_unicast(xfrm_nl, resp_skb,
1395 NETLINK_CB(skb).pid);
1398 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1399 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1404 c.data.byid = p->index;
1405 c.event = nlh->nlmsg_type;
1406 c.seq = nlh->nlmsg_seq;
1407 c.pid = nlh->nlmsg_pid;
1408 km_policy_notify(xp, p->dir, &c);
1416 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1417 struct rtattr **xfrma)
1420 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1421 struct xfrm_audit audit_info;
1424 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1425 audit_info.secid = NETLINK_CB(skb).sid;
1426 err = xfrm_state_flush(p->proto, &audit_info);
1429 c.data.proto = p->proto;
1430 c.event = nlh->nlmsg_type;
1431 c.seq = nlh->nlmsg_seq;
1432 c.pid = nlh->nlmsg_pid;
1433 km_state_notify(NULL, &c);
1439 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1441 struct xfrm_aevent_id *id;
1442 struct nlmsghdr *nlh;
1443 struct xfrm_lifetime_cur ltime;
1445 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1449 id = nlmsg_data(nlh);
1450 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1451 id->sa_id.spi = x->id.spi;
1452 id->sa_id.family = x->props.family;
1453 id->sa_id.proto = x->id.proto;
1454 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1455 id->reqid = x->props.reqid;
1456 id->flags = c->data.aevent;
1458 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1460 ltime.bytes = x->curlft.bytes;
1461 ltime.packets = x->curlft.packets;
1462 ltime.add_time = x->curlft.add_time;
1463 ltime.use_time = x->curlft.use_time;
1465 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1467 if (id->flags&XFRM_AE_RTHR) {
1468 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1471 if (id->flags&XFRM_AE_ETHR) {
1472 u32 etimer = x->replay_maxage*10/HZ;
1473 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1476 return nlmsg_end(skb, nlh);
1479 nlmsg_cancel(skb, nlh);
1483 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1484 struct rtattr **xfrma)
1486 struct xfrm_state *x;
1487 struct sk_buff *r_skb;
1490 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1491 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1492 struct xfrm_usersa_id *id = &p->sa_id;
1494 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1495 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1497 if (p->flags&XFRM_AE_RTHR)
1498 len+=RTA_SPACE(sizeof(u32));
1500 if (p->flags&XFRM_AE_ETHR)
1501 len+=RTA_SPACE(sizeof(u32));
1503 r_skb = alloc_skb(len, GFP_ATOMIC);
1507 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1514 * XXX: is this lock really needed - none of the other
1515 * gets lock (the concern is things getting updated
1516 * while we are still reading) - jhs
1518 spin_lock_bh(&x->lock);
1519 c.data.aevent = p->flags;
1520 c.seq = nlh->nlmsg_seq;
1521 c.pid = nlh->nlmsg_pid;
1523 if (build_aevent(r_skb, x, &c) < 0)
1525 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1526 spin_unlock_bh(&x->lock);
1531 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1532 struct rtattr **xfrma)
1534 struct xfrm_state *x;
1537 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1538 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1539 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1544 /* pedantic mode - thou shalt sayeth replaceth */
1545 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1548 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1552 if (x->km.state != XFRM_STATE_VALID)
1555 spin_lock_bh(&x->lock);
1556 err = xfrm_update_ae_params(x, xfrma);
1557 spin_unlock_bh(&x->lock);
1561 c.event = nlh->nlmsg_type;
1562 c.seq = nlh->nlmsg_seq;
1563 c.pid = nlh->nlmsg_pid;
1564 c.data.aevent = XFRM_AE_CU;
1565 km_state_notify(x, &c);
1572 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1573 struct rtattr **xfrma)
1576 u8 type = XFRM_POLICY_TYPE_MAIN;
1578 struct xfrm_audit audit_info;
1580 err = copy_from_user_policy_type(&type, xfrma);
1584 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1585 audit_info.secid = NETLINK_CB(skb).sid;
1586 err = xfrm_policy_flush(type, &audit_info);
1590 c.event = nlh->nlmsg_type;
1591 c.seq = nlh->nlmsg_seq;
1592 c.pid = nlh->nlmsg_pid;
1593 km_policy_notify(NULL, 0, &c);
1597 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1598 struct rtattr **xfrma)
1600 struct xfrm_policy *xp;
1601 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1602 struct xfrm_userpolicy_info *p = &up->pol;
1603 u8 type = XFRM_POLICY_TYPE_MAIN;
1606 err = copy_from_user_policy_type(&type, xfrma);
1611 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1613 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1614 struct xfrm_policy tmp;
1616 err = verify_sec_ctx_len(xfrma);
1620 memset(&tmp, 0, sizeof(struct xfrm_policy));
1622 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1624 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1627 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1629 security_xfrm_policy_free(&tmp);
1634 read_lock(&xp->lock);
1636 read_unlock(&xp->lock);
1640 read_unlock(&xp->lock);
1643 xfrm_policy_delete(xp, p->dir);
1644 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1645 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1648 // reset the timers here?
1649 printk("Dont know what to do with soft policy expire\n");
1651 km_policy_expired(xp, p->dir, up->hard, current->pid);
1658 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1659 struct rtattr **xfrma)
1661 struct xfrm_state *x;
1663 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1664 struct xfrm_usersa_info *p = &ue->state;
1666 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1672 spin_lock_bh(&x->lock);
1674 if (x->km.state != XFRM_STATE_VALID)
1676 km_state_expired(x, ue->hard, current->pid);
1679 __xfrm_state_delete(x);
1680 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1681 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1685 spin_unlock_bh(&x->lock);
1690 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1691 struct rtattr **xfrma)
1693 struct xfrm_policy *xp;
1694 struct xfrm_user_tmpl *ut;
1696 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1698 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1699 struct xfrm_state *x = xfrm_state_alloc();
1705 err = verify_newpolicy_info(&ua->policy);
1707 printk("BAD policy passed\n");
1713 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1719 memcpy(&x->id, &ua->id, sizeof(ua->id));
1720 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1721 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1724 /* extract the templates and for each call km_key */
1725 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1726 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1727 memcpy(&x->id, &t->id, sizeof(x->id));
1728 x->props.mode = t->mode;
1729 x->props.reqid = t->reqid;
1730 x->props.family = ut->family;
1731 t->aalgos = ua->aalgos;
1732 t->ealgos = ua->ealgos;
1733 t->calgos = ua->calgos;
1734 err = km_query(x, t, xp);
1744 #ifdef CONFIG_XFRM_MIGRATE
1745 static int verify_user_migrate(struct rtattr **xfrma)
1747 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1748 struct xfrm_user_migrate *um;
1753 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1759 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1760 struct rtattr **xfrma, int *num)
1762 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1763 struct xfrm_user_migrate *um;
1767 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1769 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1772 for (i = 0; i < num_migrate; i++, um++, ma++) {
1773 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1774 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1775 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1776 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1778 ma->proto = um->proto;
1779 ma->mode = um->mode;
1780 ma->reqid = um->reqid;
1782 ma->old_family = um->old_family;
1783 ma->new_family = um->new_family;
1790 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1791 struct rtattr **xfrma)
1793 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1794 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1799 err = verify_user_migrate((struct rtattr **)xfrma);
1803 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1807 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1808 (struct rtattr **)xfrma, &n);
1815 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1820 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1821 struct rtattr **xfrma)
1823 return -ENOPROTOOPT;
1827 #ifdef CONFIG_XFRM_MIGRATE
1828 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1830 struct xfrm_user_migrate um;
1832 memset(&um, 0, sizeof(um));
1833 um.proto = m->proto;
1835 um.reqid = m->reqid;
1836 um.old_family = m->old_family;
1837 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1838 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1839 um.new_family = m->new_family;
1840 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1841 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1843 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1850 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1851 int num_migrate, struct xfrm_selector *sel,
1854 struct xfrm_migrate *mp;
1855 struct xfrm_userpolicy_id *pol_id;
1856 struct nlmsghdr *nlh;
1859 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1863 pol_id = nlmsg_data(nlh);
1864 /* copy data from selector, dir, and type to the pol_id */
1865 memset(pol_id, 0, sizeof(*pol_id));
1866 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1869 if (copy_to_user_policy_type(type, skb) < 0)
1872 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1873 if (copy_to_user_migrate(mp, skb) < 0)
1877 return nlmsg_end(skb, nlh);
1879 nlmsg_cancel(skb, nlh);
1883 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1884 struct xfrm_migrate *m, int num_migrate)
1886 struct sk_buff *skb;
1889 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1890 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1891 #ifdef CONFIG_XFRM_SUB_POLICY
1892 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1894 skb = alloc_skb(len, GFP_ATOMIC);
1899 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1902 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1905 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1906 struct xfrm_migrate *m, int num_migrate)
1908 return -ENOPROTOOPT;
1912 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1914 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1915 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1916 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1917 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1918 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1919 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1920 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1921 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1922 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1923 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1924 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1925 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1926 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1927 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1928 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1929 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1930 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1931 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1932 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1933 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1934 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1939 static struct xfrm_link {
1940 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1941 int (*dump)(struct sk_buff *, struct netlink_callback *);
1942 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1943 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1944 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1945 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1946 .dump = xfrm_dump_sa },
1947 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1948 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1949 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1950 .dump = xfrm_dump_policy },
1951 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1952 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1953 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1954 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1955 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1956 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1957 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1958 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1959 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1960 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1961 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1962 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1963 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1966 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1968 struct rtattr *xfrma[XFRMA_MAX];
1969 struct xfrm_link *link;
1972 type = nlh->nlmsg_type;
1973 if (type > XFRM_MSG_MAX)
1976 type -= XFRM_MSG_BASE;
1977 link = &xfrm_dispatch[type];
1979 /* All operations require privileges, even GET */
1980 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1983 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1984 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1985 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1986 if (link->dump == NULL)
1989 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1992 memset(xfrma, 0, sizeof(xfrma));
1994 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1997 if (nlh->nlmsg_len > min_len) {
1998 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1999 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
2001 while (RTA_OK(attr, attrlen)) {
2002 unsigned short flavor = attr->rta_type;
2004 if (flavor > XFRMA_MAX)
2006 xfrma[flavor - 1] = attr;
2008 attr = RTA_NEXT(attr, attrlen);
2012 if (link->doit == NULL)
2015 return link->doit(skb, nlh, xfrma);
2018 static void xfrm_netlink_rcv(struct sock *sk, int len)
2020 unsigned int qlen = 0;
2023 mutex_lock(&xfrm_cfg_mutex);
2024 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2025 mutex_unlock(&xfrm_cfg_mutex);
2030 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2032 struct xfrm_user_expire *ue;
2033 struct nlmsghdr *nlh;
2035 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2039 ue = nlmsg_data(nlh);
2040 copy_to_user_state(x, &ue->state);
2041 ue->hard = (c->data.hard != 0) ? 1 : 0;
2043 return nlmsg_end(skb, nlh);
2046 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2048 struct sk_buff *skb;
2049 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2051 skb = alloc_skb(len, GFP_ATOMIC);
2055 if (build_expire(skb, x, c) < 0)
2058 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2061 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2063 struct sk_buff *skb;
2064 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2066 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2067 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2068 skb = alloc_skb(len, GFP_ATOMIC);
2072 if (build_aevent(skb, x, c) < 0)
2075 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2078 static int xfrm_notify_sa_flush(struct km_event *c)
2080 struct xfrm_usersa_flush *p;
2081 struct nlmsghdr *nlh;
2082 struct sk_buff *skb;
2083 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2085 skb = alloc_skb(len, GFP_ATOMIC);
2089 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2095 p = nlmsg_data(nlh);
2096 p->proto = c->data.proto;
2098 nlmsg_end(skb, nlh);
2100 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2103 static inline int xfrm_sa_len(struct xfrm_state *x)
2107 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2109 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2111 l += RTA_SPACE(sizeof(*x->calg));
2113 l += RTA_SPACE(sizeof(*x->encap));
2118 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2120 struct xfrm_usersa_info *p;
2121 struct xfrm_usersa_id *id;
2122 struct nlmsghdr *nlh;
2123 struct sk_buff *skb;
2124 int len = xfrm_sa_len(x);
2127 headlen = sizeof(*p);
2128 if (c->event == XFRM_MSG_DELSA) {
2129 len += RTA_SPACE(headlen);
2130 headlen = sizeof(*id);
2132 len += NLMSG_SPACE(headlen);
2134 skb = alloc_skb(len, GFP_ATOMIC);
2138 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2142 p = nlmsg_data(nlh);
2143 if (c->event == XFRM_MSG_DELSA) {
2144 id = nlmsg_data(nlh);
2145 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2146 id->spi = x->id.spi;
2147 id->family = x->props.family;
2148 id->proto = x->id.proto;
2150 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2153 copy_to_user_state(x, p);
2156 RTA_PUT(skb, XFRMA_ALG_AUTH,
2157 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2159 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2160 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2162 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2165 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2167 nlmsg_end(skb, nlh);
2169 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2177 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2181 case XFRM_MSG_EXPIRE:
2182 return xfrm_exp_state_notify(x, c);
2183 case XFRM_MSG_NEWAE:
2184 return xfrm_aevent_state_notify(x, c);
2185 case XFRM_MSG_DELSA:
2186 case XFRM_MSG_UPDSA:
2187 case XFRM_MSG_NEWSA:
2188 return xfrm_notify_sa(x, c);
2189 case XFRM_MSG_FLUSHSA:
2190 return xfrm_notify_sa_flush(c);
2192 printk("xfrm_user: Unknown SA event %d\n", c->event);
2200 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2201 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2204 struct xfrm_user_acquire *ua;
2205 struct nlmsghdr *nlh;
2206 __u32 seq = xfrm_get_acqseq();
2208 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2212 ua = nlmsg_data(nlh);
2213 memcpy(&ua->id, &x->id, sizeof(ua->id));
2214 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2215 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2216 copy_to_user_policy(xp, &ua->policy, dir);
2217 ua->aalgos = xt->aalgos;
2218 ua->ealgos = xt->ealgos;
2219 ua->calgos = xt->calgos;
2220 ua->seq = x->km.seq = seq;
2222 if (copy_to_user_tmpl(xp, skb) < 0)
2224 if (copy_to_user_state_sec_ctx(x, skb))
2226 if (copy_to_user_policy_type(xp->type, skb) < 0)
2229 return nlmsg_end(skb, nlh);
2232 nlmsg_cancel(skb, nlh);
2236 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2237 struct xfrm_policy *xp, int dir)
2239 struct sk_buff *skb;
2242 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2243 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2244 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2245 #ifdef CONFIG_XFRM_SUB_POLICY
2246 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2248 skb = alloc_skb(len, GFP_ATOMIC);
2252 if (build_acquire(skb, x, xt, xp, dir) < 0)
2255 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2258 /* User gives us xfrm_user_policy_info followed by an array of 0
2259 * or more templates.
2261 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2262 u8 *data, int len, int *dir)
2264 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2265 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2266 struct xfrm_policy *xp;
2269 switch (sk->sk_family) {
2271 if (opt != IP_XFRM_POLICY) {
2276 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2278 if (opt != IPV6_XFRM_POLICY) {
2291 if (len < sizeof(*p) ||
2292 verify_newpolicy_info(p))
2295 nr = ((len - sizeof(*p)) / sizeof(*ut));
2296 if (validate_tmpl(nr, ut, p->sel.family))
2299 if (p->dir > XFRM_POLICY_OUT)
2302 xp = xfrm_policy_alloc(GFP_KERNEL);
2308 copy_from_user_policy(xp, p);
2309 xp->type = XFRM_POLICY_TYPE_MAIN;
2310 copy_templates(xp, ut, nr);
2317 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2318 int dir, struct km_event *c)
2320 struct xfrm_user_polexpire *upe;
2321 struct nlmsghdr *nlh;
2322 int hard = c->data.hard;
2324 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2328 upe = nlmsg_data(nlh);
2329 copy_to_user_policy(xp, &upe->pol, dir);
2330 if (copy_to_user_tmpl(xp, skb) < 0)
2332 if (copy_to_user_sec_ctx(xp, skb))
2334 if (copy_to_user_policy_type(xp->type, skb) < 0)
2338 return nlmsg_end(skb, nlh);
2341 nlmsg_cancel(skb, nlh);
2345 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2347 struct sk_buff *skb;
2350 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2351 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2352 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2353 #ifdef CONFIG_XFRM_SUB_POLICY
2354 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2356 skb = alloc_skb(len, GFP_ATOMIC);
2360 if (build_polexpire(skb, xp, dir, c) < 0)
2363 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2366 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2368 struct xfrm_userpolicy_info *p;
2369 struct xfrm_userpolicy_id *id;
2370 struct nlmsghdr *nlh;
2371 struct sk_buff *skb;
2372 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2375 headlen = sizeof(*p);
2376 if (c->event == XFRM_MSG_DELPOLICY) {
2377 len += RTA_SPACE(headlen);
2378 headlen = sizeof(*id);
2380 #ifdef CONFIG_XFRM_SUB_POLICY
2381 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2383 len += NLMSG_SPACE(headlen);
2385 skb = alloc_skb(len, GFP_ATOMIC);
2389 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2393 p = nlmsg_data(nlh);
2394 if (c->event == XFRM_MSG_DELPOLICY) {
2395 id = nlmsg_data(nlh);
2396 memset(id, 0, sizeof(*id));
2399 id->index = xp->index;
2401 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2403 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2406 copy_to_user_policy(xp, p, dir);
2407 if (copy_to_user_tmpl(xp, skb) < 0)
2409 if (copy_to_user_policy_type(xp->type, skb) < 0)
2412 nlmsg_end(skb, nlh);
2414 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2422 static int xfrm_notify_policy_flush(struct km_event *c)
2424 struct nlmsghdr *nlh;
2425 struct sk_buff *skb;
2427 #ifdef CONFIG_XFRM_SUB_POLICY
2428 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2430 len += NLMSG_LENGTH(0);
2432 skb = alloc_skb(len, GFP_ATOMIC);
2436 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2439 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2442 nlmsg_end(skb, nlh);
2444 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2451 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2455 case XFRM_MSG_NEWPOLICY:
2456 case XFRM_MSG_UPDPOLICY:
2457 case XFRM_MSG_DELPOLICY:
2458 return xfrm_notify_policy(xp, dir, c);
2459 case XFRM_MSG_FLUSHPOLICY:
2460 return xfrm_notify_policy_flush(c);
2461 case XFRM_MSG_POLEXPIRE:
2462 return xfrm_exp_policy_notify(xp, dir, c);
2464 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2471 static int build_report(struct sk_buff *skb, u8 proto,
2472 struct xfrm_selector *sel, xfrm_address_t *addr)
2474 struct xfrm_user_report *ur;
2475 struct nlmsghdr *nlh;
2477 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2481 ur = nlmsg_data(nlh);
2483 memcpy(&ur->sel, sel, sizeof(ur->sel));
2486 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2488 return nlmsg_end(skb, nlh);
2491 nlmsg_cancel(skb, nlh);
2495 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2496 xfrm_address_t *addr)
2498 struct sk_buff *skb;
2501 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2502 skb = alloc_skb(len, GFP_ATOMIC);
2506 if (build_report(skb, proto, sel, addr) < 0)
2509 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2512 static struct xfrm_mgr netlink_mgr = {
2514 .notify = xfrm_send_state_notify,
2515 .acquire = xfrm_send_acquire,
2516 .compile_policy = xfrm_compile_policy,
2517 .notify_policy = xfrm_send_policy_notify,
2518 .report = xfrm_send_report,
2519 .migrate = xfrm_send_migrate,
2522 static int __init xfrm_user_init(void)
2526 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2528 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2529 xfrm_netlink_rcv, NULL, THIS_MODULE);
2532 rcu_assign_pointer(xfrm_nl, nlsk);
2534 xfrm_register_km(&netlink_mgr);
2539 static void __exit xfrm_user_exit(void)
2541 struct sock *nlsk = xfrm_nl;
2543 xfrm_unregister_km(&netlink_mgr);
2544 rcu_assign_pointer(xfrm_nl, NULL);
2546 sock_release(nlsk->sk_socket);
2549 module_init(xfrm_user_init);
2550 module_exit(xfrm_user_exit);
2551 MODULE_LICENSE("GPL");
2552 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);