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;
328 * someday when pfkey also has support, we could have the code
329 * somehow made shareable and move it to xfrm_state.c - JHS
332 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
335 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
336 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
337 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
338 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
341 struct xfrm_replay_state *replay;
342 if (RTA_PAYLOAD(rp) < sizeof(*replay))
344 replay = RTA_DATA(rp);
345 memcpy(&x->replay, replay, sizeof(*replay));
346 memcpy(&x->preplay, replay, sizeof(*replay));
350 struct xfrm_lifetime_cur *ltime;
351 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
353 ltime = RTA_DATA(lt);
354 x->curlft.bytes = ltime->bytes;
355 x->curlft.packets = ltime->packets;
356 x->curlft.add_time = ltime->add_time;
357 x->curlft.use_time = ltime->use_time;
361 if (RTA_PAYLOAD(et) < sizeof(u32))
363 x->replay_maxage = *(u32*)RTA_DATA(et);
367 if (RTA_PAYLOAD(rt) < sizeof(u32))
369 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
377 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
378 struct rtattr **xfrma,
381 struct xfrm_state *x = xfrm_state_alloc();
387 copy_from_user_state(x, p);
389 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
390 xfrm_aalg_get_byname,
391 xfrma[XFRMA_ALG_AUTH-1])))
393 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
394 xfrm_ealg_get_byname,
395 xfrma[XFRMA_ALG_CRYPT-1])))
397 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
398 xfrm_calg_get_byname,
399 xfrma[XFRMA_ALG_COMP-1])))
401 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
403 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
405 err = xfrm_init_state(x);
409 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
413 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
414 /* sysctl_xfrm_aevent_etime is in 100ms units */
415 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
416 x->preplay.bitmap = 0;
417 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
418 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
420 /* override default values from above */
422 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
429 x->km.state = XFRM_STATE_DEAD;
436 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
437 struct rtattr **xfrma)
439 struct xfrm_usersa_info *p = NLMSG_DATA(nlh);
440 struct xfrm_state *x;
444 err = verify_newsa_info(p, xfrma);
448 x = xfrm_state_construct(p, xfrma, &err);
453 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
454 err = xfrm_state_add(x);
456 err = xfrm_state_update(x);
458 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
459 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
462 x->km.state = XFRM_STATE_DEAD;
467 c.seq = nlh->nlmsg_seq;
468 c.pid = nlh->nlmsg_pid;
469 c.event = nlh->nlmsg_type;
471 km_state_notify(x, &c);
477 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
478 struct rtattr **xfrma,
481 struct xfrm_state *x = NULL;
484 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
486 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
488 xfrm_address_t *saddr = NULL;
490 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
500 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
510 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
511 struct rtattr **xfrma)
513 struct xfrm_state *x;
516 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
518 x = xfrm_user_state_lookup(p, xfrma, &err);
522 if ((err = security_xfrm_state_delete(x)) != 0)
525 if (xfrm_state_kern(x)) {
530 err = xfrm_state_delete(x);
535 c.seq = nlh->nlmsg_seq;
536 c.pid = nlh->nlmsg_pid;
537 c.event = nlh->nlmsg_type;
538 km_state_notify(x, &c);
541 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
542 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
547 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
549 memcpy(&p->id, &x->id, sizeof(p->id));
550 memcpy(&p->sel, &x->sel, sizeof(p->sel));
551 memcpy(&p->lft, &x->lft, sizeof(p->lft));
552 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
553 memcpy(&p->stats, &x->stats, sizeof(p->stats));
554 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
555 p->mode = x->props.mode;
556 p->replay_window = x->props.replay_window;
557 p->reqid = x->props.reqid;
558 p->family = x->props.family;
559 p->flags = x->props.flags;
563 struct xfrm_dump_info {
564 struct sk_buff *in_skb;
565 struct sk_buff *out_skb;
572 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
574 struct xfrm_dump_info *sp = ptr;
575 struct sk_buff *in_skb = sp->in_skb;
576 struct sk_buff *skb = sp->out_skb;
577 struct xfrm_usersa_info *p;
578 struct nlmsghdr *nlh;
579 unsigned char *b = skb_tail_pointer(skb);
581 if (sp->this_idx < sp->start_idx)
584 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
586 XFRM_MSG_NEWSA, sizeof(*p));
587 nlh->nlmsg_flags = sp->nlmsg_flags;
590 copy_to_user_state(x, p);
593 RTA_PUT(skb, XFRMA_ALG_AUTH,
594 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
596 RTA_PUT(skb, XFRMA_ALG_CRYPT,
597 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
599 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
602 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
605 int ctx_size = sizeof(struct xfrm_sec_ctx) +
606 x->security->ctx_len;
607 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
608 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
610 uctx->exttype = XFRMA_SEC_CTX;
611 uctx->len = ctx_size;
612 uctx->ctx_doi = x->security->ctx_doi;
613 uctx->ctx_alg = x->security->ctx_alg;
614 uctx->ctx_len = x->security->ctx_len;
615 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
619 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
622 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
624 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
635 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
637 struct xfrm_dump_info info;
639 info.in_skb = cb->skb;
641 info.nlmsg_seq = cb->nlh->nlmsg_seq;
642 info.nlmsg_flags = NLM_F_MULTI;
644 info.start_idx = cb->args[0];
645 (void) xfrm_state_walk(0, dump_one_state, &info);
646 cb->args[0] = info.this_idx;
651 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
652 struct xfrm_state *x, u32 seq)
654 struct xfrm_dump_info info;
657 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
659 return ERR_PTR(-ENOMEM);
661 info.in_skb = in_skb;
663 info.nlmsg_seq = seq;
664 info.nlmsg_flags = 0;
665 info.this_idx = info.start_idx = 0;
667 if (dump_one_state(x, 0, &info)) {
675 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
677 struct xfrmk_spdinfo si;
678 struct xfrmu_spdinfo spc;
679 struct xfrmu_spdhinfo sph;
680 struct nlmsghdr *nlh;
683 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
684 if (nlh == NULL) /* shouldnt really happen ... */
689 xfrm_spd_getinfo(&si);
690 spc.incnt = si.incnt;
691 spc.outcnt = si.outcnt;
692 spc.fwdcnt = si.fwdcnt;
693 spc.inscnt = si.inscnt;
694 spc.outscnt = si.outscnt;
695 spc.fwdscnt = si.fwdscnt;
696 sph.spdhcnt = si.spdhcnt;
697 sph.spdhmcnt = si.spdhmcnt;
699 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
700 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
702 return nlmsg_end(skb, nlh);
705 nlmsg_cancel(skb, nlh);
709 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
710 struct rtattr **xfrma)
712 struct sk_buff *r_skb;
713 u32 *flags = NLMSG_DATA(nlh);
714 u32 spid = NETLINK_CB(skb).pid;
715 u32 seq = nlh->nlmsg_seq;
716 int len = NLMSG_LENGTH(sizeof(u32));
718 len += RTA_SPACE(sizeof(struct xfrmu_spdinfo));
719 len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo));
721 r_skb = alloc_skb(len, GFP_ATOMIC);
725 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
728 return nlmsg_unicast(xfrm_nl, r_skb, spid);
731 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
733 struct xfrmk_sadinfo si;
734 struct xfrmu_sadhinfo sh;
735 struct nlmsghdr *nlh;
738 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
739 if (nlh == NULL) /* shouldnt really happen ... */
744 xfrm_sad_getinfo(&si);
746 sh.sadhmcnt = si.sadhmcnt;
747 sh.sadhcnt = si.sadhcnt;
749 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
750 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
752 return nlmsg_end(skb, nlh);
755 nlmsg_cancel(skb, nlh);
759 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
760 struct rtattr **xfrma)
762 struct sk_buff *r_skb;
763 u32 *flags = NLMSG_DATA(nlh);
764 u32 spid = NETLINK_CB(skb).pid;
765 u32 seq = nlh->nlmsg_seq;
766 int len = NLMSG_LENGTH(sizeof(u32));
768 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
769 len += RTA_SPACE(sizeof(u32));
771 r_skb = alloc_skb(len, GFP_ATOMIC);
776 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
779 return nlmsg_unicast(xfrm_nl, r_skb, spid);
782 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
783 struct rtattr **xfrma)
785 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
786 struct xfrm_state *x;
787 struct sk_buff *resp_skb;
790 x = xfrm_user_state_lookup(p, xfrma, &err);
794 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
795 if (IS_ERR(resp_skb)) {
796 err = PTR_ERR(resp_skb);
798 err = netlink_unicast(xfrm_nl, resp_skb,
799 NETLINK_CB(skb).pid, MSG_DONTWAIT);
806 static int verify_userspi_info(struct xfrm_userspi_info *p)
808 switch (p->info.id.proto) {
814 /* IPCOMP spi is 16-bits. */
815 if (p->max >= 0x10000)
829 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
830 struct rtattr **xfrma)
832 struct xfrm_state *x;
833 struct xfrm_userspi_info *p;
834 struct sk_buff *resp_skb;
835 xfrm_address_t *daddr;
840 err = verify_userspi_info(p);
844 family = p->info.family;
845 daddr = &p->info.id.daddr;
849 x = xfrm_find_acq_byseq(p->info.seq);
850 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
857 x = xfrm_find_acq(p->info.mode, p->info.reqid,
858 p->info.id.proto, daddr,
865 resp_skb = ERR_PTR(-ENOENT);
867 spin_lock_bh(&x->lock);
868 if (x->km.state != XFRM_STATE_DEAD) {
869 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
871 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
873 spin_unlock_bh(&x->lock);
875 if (IS_ERR(resp_skb)) {
876 err = PTR_ERR(resp_skb);
880 err = netlink_unicast(xfrm_nl, resp_skb,
881 NETLINK_CB(skb).pid, MSG_DONTWAIT);
889 static int verify_policy_dir(u8 dir)
893 case XFRM_POLICY_OUT:
894 case XFRM_POLICY_FWD:
904 static int verify_policy_type(u8 type)
907 case XFRM_POLICY_TYPE_MAIN:
908 #ifdef CONFIG_XFRM_SUB_POLICY
909 case XFRM_POLICY_TYPE_SUB:
920 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
924 case XFRM_SHARE_SESSION:
925 case XFRM_SHARE_USER:
926 case XFRM_SHARE_UNIQUE:
934 case XFRM_POLICY_ALLOW:
935 case XFRM_POLICY_BLOCK:
942 switch (p->sel.family) {
947 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
950 return -EAFNOSUPPORT;
957 return verify_policy_dir(p->dir);
960 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
962 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
963 struct xfrm_user_sec_ctx *uctx;
969 return security_xfrm_policy_alloc(pol, uctx);
972 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
978 for (i = 0; i < nr; i++, ut++) {
979 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
981 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
982 memcpy(&t->saddr, &ut->saddr,
983 sizeof(xfrm_address_t));
984 t->reqid = ut->reqid;
986 t->share = ut->share;
987 t->optional = ut->optional;
988 t->aalgos = ut->aalgos;
989 t->ealgos = ut->ealgos;
990 t->calgos = ut->calgos;
991 t->encap_family = ut->family;
995 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
999 if (nr > XFRM_MAX_DEPTH)
1002 for (i = 0; i < nr; i++) {
1003 /* We never validated the ut->family value, so many
1004 * applications simply leave it at zero. The check was
1005 * never made and ut->family was ignored because all
1006 * templates could be assumed to have the same family as
1007 * the policy itself. Now that we will have ipv4-in-ipv6
1008 * and ipv6-in-ipv4 tunnels, this is no longer true.
1011 ut[i].family = family;
1013 switch (ut[i].family) {
1016 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1028 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1030 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1035 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1036 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1039 err = validate_tmpl(nr, utmpl, pol->family);
1043 copy_templates(pol, RTA_DATA(rt), nr);
1048 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1050 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1051 struct xfrm_userpolicy_type *upt;
1052 u8 type = XFRM_POLICY_TYPE_MAIN;
1056 if (rt->rta_len < sizeof(*upt))
1063 err = verify_policy_type(type);
1071 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1073 xp->priority = p->priority;
1074 xp->index = p->index;
1075 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1076 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1077 xp->action = p->action;
1078 xp->flags = p->flags;
1079 xp->family = p->sel.family;
1080 /* XXX xp->share = p->share; */
1083 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1085 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1086 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1087 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1088 p->priority = xp->priority;
1089 p->index = xp->index;
1090 p->sel.family = xp->family;
1092 p->action = xp->action;
1093 p->flags = xp->flags;
1094 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1097 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1099 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1107 copy_from_user_policy(xp, p);
1109 err = copy_from_user_policy_type(&xp->type, xfrma);
1113 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1114 err = copy_from_user_sec_ctx(xp, xfrma);
1125 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1126 struct rtattr **xfrma)
1128 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1129 struct xfrm_policy *xp;
1134 err = verify_newpolicy_info(p);
1137 err = verify_sec_ctx_len(xfrma);
1141 xp = xfrm_policy_construct(p, xfrma, &err);
1145 /* shouldnt excl be based on nlh flags??
1146 * Aha! this is anti-netlink really i.e more pfkey derived
1147 * in netlink excl is a flag and you wouldnt need
1148 * a type XFRM_MSG_UPDPOLICY - JHS */
1149 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1150 err = xfrm_policy_insert(p->dir, xp, excl);
1151 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1152 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1155 security_xfrm_policy_free(xp);
1160 c.event = nlh->nlmsg_type;
1161 c.seq = nlh->nlmsg_seq;
1162 c.pid = nlh->nlmsg_pid;
1163 km_policy_notify(xp, p->dir, &c);
1170 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1172 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1175 if (xp->xfrm_nr == 0)
1178 for (i = 0; i < xp->xfrm_nr; i++) {
1179 struct xfrm_user_tmpl *up = &vec[i];
1180 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1182 memcpy(&up->id, &kp->id, sizeof(up->id));
1183 up->family = kp->encap_family;
1184 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1185 up->reqid = kp->reqid;
1186 up->mode = kp->mode;
1187 up->share = kp->share;
1188 up->optional = kp->optional;
1189 up->aalgos = kp->aalgos;
1190 up->ealgos = kp->ealgos;
1191 up->calgos = kp->calgos;
1193 RTA_PUT(skb, XFRMA_TMPL,
1194 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1203 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1205 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1206 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1207 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1209 uctx->exttype = XFRMA_SEC_CTX;
1210 uctx->len = ctx_size;
1211 uctx->ctx_doi = s->ctx_doi;
1212 uctx->ctx_alg = s->ctx_alg;
1213 uctx->ctx_len = s->ctx_len;
1214 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1221 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1224 return copy_sec_ctx(x->security, skb);
1229 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1232 return copy_sec_ctx(xp->security, skb);
1237 #ifdef CONFIG_XFRM_SUB_POLICY
1238 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1240 struct xfrm_userpolicy_type upt;
1242 memset(&upt, 0, sizeof(upt));
1245 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1254 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1260 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1262 struct xfrm_dump_info *sp = ptr;
1263 struct xfrm_userpolicy_info *p;
1264 struct sk_buff *in_skb = sp->in_skb;
1265 struct sk_buff *skb = sp->out_skb;
1266 struct nlmsghdr *nlh;
1267 unsigned char *b = skb_tail_pointer(skb);
1269 if (sp->this_idx < sp->start_idx)
1272 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1274 XFRM_MSG_NEWPOLICY, sizeof(*p));
1275 p = NLMSG_DATA(nlh);
1276 nlh->nlmsg_flags = sp->nlmsg_flags;
1278 copy_to_user_policy(xp, p, dir);
1279 if (copy_to_user_tmpl(xp, skb) < 0)
1281 if (copy_to_user_sec_ctx(xp, skb))
1283 if (copy_to_user_policy_type(xp->type, skb) < 0)
1286 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1296 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1298 struct xfrm_dump_info info;
1300 info.in_skb = cb->skb;
1302 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1303 info.nlmsg_flags = NLM_F_MULTI;
1305 info.start_idx = cb->args[0];
1306 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1307 #ifdef CONFIG_XFRM_SUB_POLICY
1308 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1310 cb->args[0] = info.this_idx;
1315 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1316 struct xfrm_policy *xp,
1319 struct xfrm_dump_info info;
1320 struct sk_buff *skb;
1322 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1324 return ERR_PTR(-ENOMEM);
1326 info.in_skb = in_skb;
1328 info.nlmsg_seq = seq;
1329 info.nlmsg_flags = 0;
1330 info.this_idx = info.start_idx = 0;
1332 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1340 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1341 struct rtattr **xfrma)
1343 struct xfrm_policy *xp;
1344 struct xfrm_userpolicy_id *p;
1345 u8 type = XFRM_POLICY_TYPE_MAIN;
1350 p = NLMSG_DATA(nlh);
1351 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1353 err = copy_from_user_policy_type(&type, xfrma);
1357 err = verify_policy_dir(p->dir);
1362 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1364 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1365 struct xfrm_policy tmp;
1367 err = verify_sec_ctx_len(xfrma);
1371 memset(&tmp, 0, sizeof(struct xfrm_policy));
1373 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1375 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1378 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1380 security_xfrm_policy_free(&tmp);
1386 struct sk_buff *resp_skb;
1388 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1389 if (IS_ERR(resp_skb)) {
1390 err = PTR_ERR(resp_skb);
1392 err = netlink_unicast(xfrm_nl, resp_skb,
1393 NETLINK_CB(skb).pid,
1397 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1398 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1403 c.data.byid = p->index;
1404 c.event = nlh->nlmsg_type;
1405 c.seq = nlh->nlmsg_seq;
1406 c.pid = nlh->nlmsg_pid;
1407 km_policy_notify(xp, p->dir, &c);
1415 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1416 struct rtattr **xfrma)
1419 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1420 struct xfrm_audit audit_info;
1423 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1424 audit_info.secid = NETLINK_CB(skb).sid;
1425 err = xfrm_state_flush(p->proto, &audit_info);
1428 c.data.proto = p->proto;
1429 c.event = nlh->nlmsg_type;
1430 c.seq = nlh->nlmsg_seq;
1431 c.pid = nlh->nlmsg_pid;
1432 km_state_notify(NULL, &c);
1438 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1440 struct xfrm_aevent_id *id;
1441 struct nlmsghdr *nlh;
1442 struct xfrm_lifetime_cur ltime;
1443 unsigned char *b = skb_tail_pointer(skb);
1445 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1446 id = NLMSG_DATA(nlh);
1447 nlh->nlmsg_flags = 0;
1449 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1450 id->sa_id.spi = x->id.spi;
1451 id->sa_id.family = x->props.family;
1452 id->sa_id.proto = x->id.proto;
1453 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1454 id->reqid = x->props.reqid;
1455 id->flags = c->data.aevent;
1457 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1459 ltime.bytes = x->curlft.bytes;
1460 ltime.packets = x->curlft.packets;
1461 ltime.add_time = x->curlft.add_time;
1462 ltime.use_time = x->curlft.use_time;
1464 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1466 if (id->flags&XFRM_AE_RTHR) {
1467 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1470 if (id->flags&XFRM_AE_ETHR) {
1471 u32 etimer = x->replay_maxage*10/HZ;
1472 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1475 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1484 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1485 struct rtattr **xfrma)
1487 struct xfrm_state *x;
1488 struct sk_buff *r_skb;
1491 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1492 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1493 struct xfrm_usersa_id *id = &p->sa_id;
1495 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1496 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1498 if (p->flags&XFRM_AE_RTHR)
1499 len+=RTA_SPACE(sizeof(u32));
1501 if (p->flags&XFRM_AE_ETHR)
1502 len+=RTA_SPACE(sizeof(u32));
1504 r_skb = alloc_skb(len, GFP_ATOMIC);
1508 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1515 * XXX: is this lock really needed - none of the other
1516 * gets lock (the concern is things getting updated
1517 * while we are still reading) - jhs
1519 spin_lock_bh(&x->lock);
1520 c.data.aevent = p->flags;
1521 c.seq = nlh->nlmsg_seq;
1522 c.pid = nlh->nlmsg_pid;
1524 if (build_aevent(r_skb, x, &c) < 0)
1526 err = netlink_unicast(xfrm_nl, r_skb,
1527 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1528 spin_unlock_bh(&x->lock);
1533 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1534 struct rtattr **xfrma)
1536 struct xfrm_state *x;
1539 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1540 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1541 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1546 /* pedantic mode - thou shalt sayeth replaceth */
1547 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1550 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1554 if (x->km.state != XFRM_STATE_VALID)
1557 spin_lock_bh(&x->lock);
1558 err = xfrm_update_ae_params(x, xfrma);
1559 spin_unlock_bh(&x->lock);
1563 c.event = nlh->nlmsg_type;
1564 c.seq = nlh->nlmsg_seq;
1565 c.pid = nlh->nlmsg_pid;
1566 c.data.aevent = XFRM_AE_CU;
1567 km_state_notify(x, &c);
1574 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1575 struct rtattr **xfrma)
1578 u8 type = XFRM_POLICY_TYPE_MAIN;
1580 struct xfrm_audit audit_info;
1582 err = copy_from_user_policy_type(&type, xfrma);
1586 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1587 audit_info.secid = NETLINK_CB(skb).sid;
1588 err = xfrm_policy_flush(type, &audit_info);
1592 c.event = nlh->nlmsg_type;
1593 c.seq = nlh->nlmsg_seq;
1594 c.pid = nlh->nlmsg_pid;
1595 km_policy_notify(NULL, 0, &c);
1599 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1600 struct rtattr **xfrma)
1602 struct xfrm_policy *xp;
1603 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1604 struct xfrm_userpolicy_info *p = &up->pol;
1605 u8 type = XFRM_POLICY_TYPE_MAIN;
1608 err = copy_from_user_policy_type(&type, xfrma);
1613 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1615 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1616 struct xfrm_policy tmp;
1618 err = verify_sec_ctx_len(xfrma);
1622 memset(&tmp, 0, sizeof(struct xfrm_policy));
1624 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1626 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1629 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1631 security_xfrm_policy_free(&tmp);
1636 read_lock(&xp->lock);
1638 read_unlock(&xp->lock);
1642 read_unlock(&xp->lock);
1645 xfrm_policy_delete(xp, p->dir);
1646 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1647 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1650 // reset the timers here?
1651 printk("Dont know what to do with soft policy expire\n");
1653 km_policy_expired(xp, p->dir, up->hard, current->pid);
1660 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1661 struct rtattr **xfrma)
1663 struct xfrm_state *x;
1665 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1666 struct xfrm_usersa_info *p = &ue->state;
1668 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1674 spin_lock_bh(&x->lock);
1676 if (x->km.state != XFRM_STATE_VALID)
1678 km_state_expired(x, ue->hard, current->pid);
1681 __xfrm_state_delete(x);
1682 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1683 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1687 spin_unlock_bh(&x->lock);
1692 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1693 struct rtattr **xfrma)
1695 struct xfrm_policy *xp;
1696 struct xfrm_user_tmpl *ut;
1698 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1700 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1701 struct xfrm_state *x = xfrm_state_alloc();
1707 err = verify_newpolicy_info(&ua->policy);
1709 printk("BAD policy passed\n");
1715 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1721 memcpy(&x->id, &ua->id, sizeof(ua->id));
1722 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1723 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1726 /* extract the templates and for each call km_key */
1727 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1728 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1729 memcpy(&x->id, &t->id, sizeof(x->id));
1730 x->props.mode = t->mode;
1731 x->props.reqid = t->reqid;
1732 x->props.family = ut->family;
1733 t->aalgos = ua->aalgos;
1734 t->ealgos = ua->ealgos;
1735 t->calgos = ua->calgos;
1736 err = km_query(x, t, xp);
1746 #ifdef CONFIG_XFRM_MIGRATE
1747 static int verify_user_migrate(struct rtattr **xfrma)
1749 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1750 struct xfrm_user_migrate *um;
1755 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1761 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1762 struct rtattr **xfrma, int *num)
1764 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1765 struct xfrm_user_migrate *um;
1769 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1771 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1774 for (i = 0; i < num_migrate; i++, um++, ma++) {
1775 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1776 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1777 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1778 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1780 ma->proto = um->proto;
1781 ma->mode = um->mode;
1782 ma->reqid = um->reqid;
1784 ma->old_family = um->old_family;
1785 ma->new_family = um->new_family;
1792 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1793 struct rtattr **xfrma)
1795 struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
1796 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1801 err = verify_user_migrate((struct rtattr **)xfrma);
1805 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1809 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1810 (struct rtattr **)xfrma, &n);
1817 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1822 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1823 struct rtattr **xfrma)
1825 return -ENOPROTOOPT;
1829 #ifdef CONFIG_XFRM_MIGRATE
1830 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1832 struct xfrm_user_migrate um;
1834 memset(&um, 0, sizeof(um));
1835 um.proto = m->proto;
1837 um.reqid = m->reqid;
1838 um.old_family = m->old_family;
1839 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1840 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1841 um.new_family = m->new_family;
1842 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1843 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1845 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1852 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1853 int num_migrate, struct xfrm_selector *sel,
1856 struct xfrm_migrate *mp;
1857 struct xfrm_userpolicy_id *pol_id;
1858 struct nlmsghdr *nlh;
1859 unsigned char *b = skb_tail_pointer(skb);
1862 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id));
1863 pol_id = NLMSG_DATA(nlh);
1864 nlh->nlmsg_flags = 0;
1866 /* copy data from selector, dir, and type to the pol_id */
1867 memset(pol_id, 0, sizeof(*pol_id));
1868 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1871 if (copy_to_user_policy_type(type, skb) < 0)
1874 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1875 if (copy_to_user_migrate(mp, skb) < 0)
1879 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1886 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1887 struct xfrm_migrate *m, int num_migrate)
1889 struct sk_buff *skb;
1892 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1893 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1894 #ifdef CONFIG_XFRM_SUB_POLICY
1895 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1897 skb = alloc_skb(len, GFP_ATOMIC);
1902 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1905 NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
1906 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
1910 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1911 struct xfrm_migrate *m, int num_migrate)
1913 return -ENOPROTOOPT;
1917 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1919 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1920 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1921 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1922 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1923 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1924 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1925 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1926 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1927 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1928 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1929 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1930 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1931 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1932 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1933 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1934 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1935 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1936 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1937 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1938 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1939 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1944 static struct xfrm_link {
1945 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1946 int (*dump)(struct sk_buff *, struct netlink_callback *);
1947 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1948 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1949 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1950 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1951 .dump = xfrm_dump_sa },
1952 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1953 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1954 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1955 .dump = xfrm_dump_policy },
1956 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1957 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1958 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1959 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1960 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1961 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1962 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1963 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1964 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1965 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1966 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1967 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1968 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1971 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1973 struct rtattr *xfrma[XFRMA_MAX];
1974 struct xfrm_link *link;
1977 type = nlh->nlmsg_type;
1978 if (type > XFRM_MSG_MAX)
1981 type -= XFRM_MSG_BASE;
1982 link = &xfrm_dispatch[type];
1984 /* All operations require privileges, even GET */
1985 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1988 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1989 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1990 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1991 if (link->dump == NULL)
1994 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1997 memset(xfrma, 0, sizeof(xfrma));
1999 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
2002 if (nlh->nlmsg_len > min_len) {
2003 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2004 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
2006 while (RTA_OK(attr, attrlen)) {
2007 unsigned short flavor = attr->rta_type;
2009 if (flavor > XFRMA_MAX)
2011 xfrma[flavor - 1] = attr;
2013 attr = RTA_NEXT(attr, attrlen);
2017 if (link->doit == NULL)
2020 return link->doit(skb, nlh, xfrma);
2023 static void xfrm_netlink_rcv(struct sock *sk, int len)
2025 unsigned int qlen = 0;
2028 mutex_lock(&xfrm_cfg_mutex);
2029 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2030 mutex_unlock(&xfrm_cfg_mutex);
2035 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2037 struct xfrm_user_expire *ue;
2038 struct nlmsghdr *nlh;
2039 unsigned char *b = skb_tail_pointer(skb);
2041 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
2043 ue = NLMSG_DATA(nlh);
2044 nlh->nlmsg_flags = 0;
2046 copy_to_user_state(x, &ue->state);
2047 ue->hard = (c->data.hard != 0) ? 1 : 0;
2049 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2057 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2059 struct sk_buff *skb;
2060 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2062 skb = alloc_skb(len, GFP_ATOMIC);
2066 if (build_expire(skb, x, c) < 0)
2069 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2070 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2073 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2075 struct sk_buff *skb;
2076 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2078 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2079 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2080 skb = alloc_skb(len, GFP_ATOMIC);
2084 if (build_aevent(skb, x, c) < 0)
2087 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
2088 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2091 static int xfrm_notify_sa_flush(struct km_event *c)
2093 struct xfrm_usersa_flush *p;
2094 struct nlmsghdr *nlh;
2095 struct sk_buff *skb;
2097 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2099 skb = alloc_skb(len, GFP_ATOMIC);
2104 nlh = NLMSG_PUT(skb, c->pid, c->seq,
2105 XFRM_MSG_FLUSHSA, sizeof(*p));
2106 nlh->nlmsg_flags = 0;
2108 p = NLMSG_DATA(nlh);
2109 p->proto = c->data.proto;
2111 nlh->nlmsg_len = skb->tail - b;
2113 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2114 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2121 static inline int xfrm_sa_len(struct xfrm_state *x)
2125 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2127 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2129 l += RTA_SPACE(sizeof(*x->calg));
2131 l += RTA_SPACE(sizeof(*x->encap));
2136 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2138 struct xfrm_usersa_info *p;
2139 struct xfrm_usersa_id *id;
2140 struct nlmsghdr *nlh;
2141 struct sk_buff *skb;
2143 int len = xfrm_sa_len(x);
2146 headlen = sizeof(*p);
2147 if (c->event == XFRM_MSG_DELSA) {
2148 len += RTA_SPACE(headlen);
2149 headlen = sizeof(*id);
2151 len += NLMSG_SPACE(headlen);
2153 skb = alloc_skb(len, GFP_ATOMIC);
2158 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2159 nlh->nlmsg_flags = 0;
2161 p = NLMSG_DATA(nlh);
2162 if (c->event == XFRM_MSG_DELSA) {
2163 id = NLMSG_DATA(nlh);
2164 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2165 id->spi = x->id.spi;
2166 id->family = x->props.family;
2167 id->proto = x->id.proto;
2169 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2172 copy_to_user_state(x, p);
2175 RTA_PUT(skb, XFRMA_ALG_AUTH,
2176 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2178 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2179 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2181 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2184 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2186 nlh->nlmsg_len = skb->tail - b;
2188 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2189 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2197 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2201 case XFRM_MSG_EXPIRE:
2202 return xfrm_exp_state_notify(x, c);
2203 case XFRM_MSG_NEWAE:
2204 return xfrm_aevent_state_notify(x, c);
2205 case XFRM_MSG_DELSA:
2206 case XFRM_MSG_UPDSA:
2207 case XFRM_MSG_NEWSA:
2208 return xfrm_notify_sa(x, c);
2209 case XFRM_MSG_FLUSHSA:
2210 return xfrm_notify_sa_flush(c);
2212 printk("xfrm_user: Unknown SA event %d\n", c->event);
2220 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2221 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2224 struct xfrm_user_acquire *ua;
2225 struct nlmsghdr *nlh;
2226 unsigned char *b = skb_tail_pointer(skb);
2227 __u32 seq = xfrm_get_acqseq();
2229 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
2231 ua = NLMSG_DATA(nlh);
2232 nlh->nlmsg_flags = 0;
2234 memcpy(&ua->id, &x->id, sizeof(ua->id));
2235 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2236 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2237 copy_to_user_policy(xp, &ua->policy, dir);
2238 ua->aalgos = xt->aalgos;
2239 ua->ealgos = xt->ealgos;
2240 ua->calgos = xt->calgos;
2241 ua->seq = x->km.seq = seq;
2243 if (copy_to_user_tmpl(xp, skb) < 0)
2245 if (copy_to_user_state_sec_ctx(x, skb))
2247 if (copy_to_user_policy_type(xp->type, skb) < 0)
2250 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2258 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2259 struct xfrm_policy *xp, int dir)
2261 struct sk_buff *skb;
2264 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2265 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2266 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2267 #ifdef CONFIG_XFRM_SUB_POLICY
2268 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2270 skb = alloc_skb(len, GFP_ATOMIC);
2274 if (build_acquire(skb, x, xt, xp, dir) < 0)
2277 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2278 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2281 /* User gives us xfrm_user_policy_info followed by an array of 0
2282 * or more templates.
2284 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2285 u8 *data, int len, int *dir)
2287 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2288 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2289 struct xfrm_policy *xp;
2292 switch (sk->sk_family) {
2294 if (opt != IP_XFRM_POLICY) {
2299 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2301 if (opt != IPV6_XFRM_POLICY) {
2314 if (len < sizeof(*p) ||
2315 verify_newpolicy_info(p))
2318 nr = ((len - sizeof(*p)) / sizeof(*ut));
2319 if (validate_tmpl(nr, ut, p->sel.family))
2322 if (p->dir > XFRM_POLICY_OUT)
2325 xp = xfrm_policy_alloc(GFP_KERNEL);
2331 copy_from_user_policy(xp, p);
2332 xp->type = XFRM_POLICY_TYPE_MAIN;
2333 copy_templates(xp, ut, nr);
2340 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2341 int dir, struct km_event *c)
2343 struct xfrm_user_polexpire *upe;
2344 struct nlmsghdr *nlh;
2345 int hard = c->data.hard;
2346 unsigned char *b = skb_tail_pointer(skb);
2348 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2349 upe = NLMSG_DATA(nlh);
2350 nlh->nlmsg_flags = 0;
2352 copy_to_user_policy(xp, &upe->pol, dir);
2353 if (copy_to_user_tmpl(xp, skb) < 0)
2355 if (copy_to_user_sec_ctx(xp, skb))
2357 if (copy_to_user_policy_type(xp->type, skb) < 0)
2361 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2369 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2371 struct sk_buff *skb;
2374 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2375 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2376 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2377 #ifdef CONFIG_XFRM_SUB_POLICY
2378 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2380 skb = alloc_skb(len, GFP_ATOMIC);
2384 if (build_polexpire(skb, xp, dir, c) < 0)
2387 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2388 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2391 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2393 struct xfrm_userpolicy_info *p;
2394 struct xfrm_userpolicy_id *id;
2395 struct nlmsghdr *nlh;
2396 struct sk_buff *skb;
2398 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2401 headlen = sizeof(*p);
2402 if (c->event == XFRM_MSG_DELPOLICY) {
2403 len += RTA_SPACE(headlen);
2404 headlen = sizeof(*id);
2406 #ifdef CONFIG_XFRM_SUB_POLICY
2407 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2409 len += NLMSG_SPACE(headlen);
2411 skb = alloc_skb(len, GFP_ATOMIC);
2416 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2418 p = NLMSG_DATA(nlh);
2419 if (c->event == XFRM_MSG_DELPOLICY) {
2420 id = NLMSG_DATA(nlh);
2421 memset(id, 0, sizeof(*id));
2424 id->index = xp->index;
2426 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2428 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2431 nlh->nlmsg_flags = 0;
2433 copy_to_user_policy(xp, p, dir);
2434 if (copy_to_user_tmpl(xp, skb) < 0)
2436 if (copy_to_user_policy_type(xp->type, skb) < 0)
2439 nlh->nlmsg_len = skb->tail - b;
2441 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2442 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2450 static int xfrm_notify_policy_flush(struct km_event *c)
2452 struct nlmsghdr *nlh;
2453 struct sk_buff *skb;
2456 #ifdef CONFIG_XFRM_SUB_POLICY
2457 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2459 len += NLMSG_LENGTH(0);
2461 skb = alloc_skb(len, GFP_ATOMIC);
2467 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2468 nlh->nlmsg_flags = 0;
2469 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2472 nlh->nlmsg_len = skb->tail - b;
2474 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2475 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2482 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2486 case XFRM_MSG_NEWPOLICY:
2487 case XFRM_MSG_UPDPOLICY:
2488 case XFRM_MSG_DELPOLICY:
2489 return xfrm_notify_policy(xp, dir, c);
2490 case XFRM_MSG_FLUSHPOLICY:
2491 return xfrm_notify_policy_flush(c);
2492 case XFRM_MSG_POLEXPIRE:
2493 return xfrm_exp_policy_notify(xp, dir, c);
2495 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2502 static int build_report(struct sk_buff *skb, u8 proto,
2503 struct xfrm_selector *sel, xfrm_address_t *addr)
2505 struct xfrm_user_report *ur;
2506 struct nlmsghdr *nlh;
2507 unsigned char *b = skb_tail_pointer(skb);
2509 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2510 ur = NLMSG_DATA(nlh);
2511 nlh->nlmsg_flags = 0;
2514 memcpy(&ur->sel, sel, sizeof(ur->sel));
2517 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2519 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2528 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2529 xfrm_address_t *addr)
2531 struct sk_buff *skb;
2534 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2535 skb = alloc_skb(len, GFP_ATOMIC);
2539 if (build_report(skb, proto, sel, addr) < 0)
2542 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2543 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2546 static struct xfrm_mgr netlink_mgr = {
2548 .notify = xfrm_send_state_notify,
2549 .acquire = xfrm_send_acquire,
2550 .compile_policy = xfrm_compile_policy,
2551 .notify_policy = xfrm_send_policy_notify,
2552 .report = xfrm_send_report,
2553 .migrate = xfrm_send_migrate,
2556 static int __init xfrm_user_init(void)
2560 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2562 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2563 xfrm_netlink_rcv, NULL, THIS_MODULE);
2566 rcu_assign_pointer(xfrm_nl, nlsk);
2568 xfrm_register_km(&netlink_mgr);
2573 static void __exit xfrm_user_exit(void)
2575 struct sock *nlsk = xfrm_nl;
2577 xfrm_unregister_km(&netlink_mgr);
2578 rcu_assign_pointer(xfrm_nl, NULL);
2580 sock_release(nlsk->sk_socket);
2583 module_init(xfrm_user_init);
2584 module_exit(xfrm_user_exit);
2585 MODULE_LICENSE("GPL");
2586 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);