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;
586 unsigned char *b = skb_tail_pointer(skb);
588 if (sp->this_idx < sp->start_idx)
591 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
592 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
597 copy_to_user_state(x, p);
600 RTA_PUT(skb, XFRMA_ALG_AUTH,
601 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
603 RTA_PUT(skb, XFRMA_ALG_CRYPT,
604 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
606 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
609 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
612 int ctx_size = sizeof(struct xfrm_sec_ctx) +
613 x->security->ctx_len;
614 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
615 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
617 uctx->exttype = XFRMA_SEC_CTX;
618 uctx->len = ctx_size;
619 uctx->ctx_doi = x->security->ctx_doi;
620 uctx->ctx_alg = x->security->ctx_alg;
621 uctx->ctx_len = x->security->ctx_len;
622 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
626 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
629 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
631 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
641 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
643 struct xfrm_dump_info info;
645 info.in_skb = cb->skb;
647 info.nlmsg_seq = cb->nlh->nlmsg_seq;
648 info.nlmsg_flags = NLM_F_MULTI;
650 info.start_idx = cb->args[0];
651 (void) xfrm_state_walk(0, dump_one_state, &info);
652 cb->args[0] = info.this_idx;
657 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
658 struct xfrm_state *x, u32 seq)
660 struct xfrm_dump_info info;
663 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
665 return ERR_PTR(-ENOMEM);
667 info.in_skb = in_skb;
669 info.nlmsg_seq = seq;
670 info.nlmsg_flags = 0;
671 info.this_idx = info.start_idx = 0;
673 if (dump_one_state(x, 0, &info)) {
681 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
683 struct xfrmk_spdinfo si;
684 struct xfrmu_spdinfo spc;
685 struct xfrmu_spdhinfo sph;
686 struct nlmsghdr *nlh;
689 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
690 if (nlh == NULL) /* shouldnt really happen ... */
695 xfrm_spd_getinfo(&si);
696 spc.incnt = si.incnt;
697 spc.outcnt = si.outcnt;
698 spc.fwdcnt = si.fwdcnt;
699 spc.inscnt = si.inscnt;
700 spc.outscnt = si.outscnt;
701 spc.fwdscnt = si.fwdscnt;
702 sph.spdhcnt = si.spdhcnt;
703 sph.spdhmcnt = si.spdhmcnt;
705 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
706 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
708 return nlmsg_end(skb, nlh);
711 nlmsg_cancel(skb, nlh);
715 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
716 struct rtattr **xfrma)
718 struct sk_buff *r_skb;
719 u32 *flags = NLMSG_DATA(nlh);
720 u32 spid = NETLINK_CB(skb).pid;
721 u32 seq = nlh->nlmsg_seq;
722 int len = NLMSG_LENGTH(sizeof(u32));
724 len += RTA_SPACE(sizeof(struct xfrmu_spdinfo));
725 len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo));
727 r_skb = alloc_skb(len, GFP_ATOMIC);
731 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
734 return nlmsg_unicast(xfrm_nl, r_skb, spid);
737 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
739 struct xfrmk_sadinfo si;
740 struct xfrmu_sadhinfo sh;
741 struct nlmsghdr *nlh;
744 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
745 if (nlh == NULL) /* shouldnt really happen ... */
750 xfrm_sad_getinfo(&si);
752 sh.sadhmcnt = si.sadhmcnt;
753 sh.sadhcnt = si.sadhcnt;
755 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
756 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
758 return nlmsg_end(skb, nlh);
761 nlmsg_cancel(skb, nlh);
765 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
766 struct rtattr **xfrma)
768 struct sk_buff *r_skb;
769 u32 *flags = NLMSG_DATA(nlh);
770 u32 spid = NETLINK_CB(skb).pid;
771 u32 seq = nlh->nlmsg_seq;
772 int len = NLMSG_LENGTH(sizeof(u32));
774 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
775 len += RTA_SPACE(sizeof(u32));
777 r_skb = alloc_skb(len, GFP_ATOMIC);
782 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
785 return nlmsg_unicast(xfrm_nl, r_skb, spid);
788 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
789 struct rtattr **xfrma)
791 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
792 struct xfrm_state *x;
793 struct sk_buff *resp_skb;
796 x = xfrm_user_state_lookup(p, xfrma, &err);
800 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
801 if (IS_ERR(resp_skb)) {
802 err = PTR_ERR(resp_skb);
804 err = netlink_unicast(xfrm_nl, resp_skb,
805 NETLINK_CB(skb).pid, MSG_DONTWAIT);
812 static int verify_userspi_info(struct xfrm_userspi_info *p)
814 switch (p->info.id.proto) {
820 /* IPCOMP spi is 16-bits. */
821 if (p->max >= 0x10000)
835 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
836 struct rtattr **xfrma)
838 struct xfrm_state *x;
839 struct xfrm_userspi_info *p;
840 struct sk_buff *resp_skb;
841 xfrm_address_t *daddr;
846 err = verify_userspi_info(p);
850 family = p->info.family;
851 daddr = &p->info.id.daddr;
855 x = xfrm_find_acq_byseq(p->info.seq);
856 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
863 x = xfrm_find_acq(p->info.mode, p->info.reqid,
864 p->info.id.proto, daddr,
871 resp_skb = ERR_PTR(-ENOENT);
873 spin_lock_bh(&x->lock);
874 if (x->km.state != XFRM_STATE_DEAD) {
875 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
877 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
879 spin_unlock_bh(&x->lock);
881 if (IS_ERR(resp_skb)) {
882 err = PTR_ERR(resp_skb);
886 err = netlink_unicast(xfrm_nl, resp_skb,
887 NETLINK_CB(skb).pid, MSG_DONTWAIT);
895 static int verify_policy_dir(u8 dir)
899 case XFRM_POLICY_OUT:
900 case XFRM_POLICY_FWD:
910 static int verify_policy_type(u8 type)
913 case XFRM_POLICY_TYPE_MAIN:
914 #ifdef CONFIG_XFRM_SUB_POLICY
915 case XFRM_POLICY_TYPE_SUB:
926 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
930 case XFRM_SHARE_SESSION:
931 case XFRM_SHARE_USER:
932 case XFRM_SHARE_UNIQUE:
940 case XFRM_POLICY_ALLOW:
941 case XFRM_POLICY_BLOCK:
948 switch (p->sel.family) {
953 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
956 return -EAFNOSUPPORT;
963 return verify_policy_dir(p->dir);
966 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
968 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
969 struct xfrm_user_sec_ctx *uctx;
975 return security_xfrm_policy_alloc(pol, uctx);
978 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
984 for (i = 0; i < nr; i++, ut++) {
985 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
987 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
988 memcpy(&t->saddr, &ut->saddr,
989 sizeof(xfrm_address_t));
990 t->reqid = ut->reqid;
992 t->share = ut->share;
993 t->optional = ut->optional;
994 t->aalgos = ut->aalgos;
995 t->ealgos = ut->ealgos;
996 t->calgos = ut->calgos;
997 t->encap_family = ut->family;
1001 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1005 if (nr > XFRM_MAX_DEPTH)
1008 for (i = 0; i < nr; i++) {
1009 /* We never validated the ut->family value, so many
1010 * applications simply leave it at zero. The check was
1011 * never made and ut->family was ignored because all
1012 * templates could be assumed to have the same family as
1013 * the policy itself. Now that we will have ipv4-in-ipv6
1014 * and ipv6-in-ipv4 tunnels, this is no longer true.
1017 ut[i].family = family;
1019 switch (ut[i].family) {
1022 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1034 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1036 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1041 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1042 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1045 err = validate_tmpl(nr, utmpl, pol->family);
1049 copy_templates(pol, RTA_DATA(rt), nr);
1054 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1056 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1057 struct xfrm_userpolicy_type *upt;
1058 u8 type = XFRM_POLICY_TYPE_MAIN;
1062 if (rt->rta_len < sizeof(*upt))
1069 err = verify_policy_type(type);
1077 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1079 xp->priority = p->priority;
1080 xp->index = p->index;
1081 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1082 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1083 xp->action = p->action;
1084 xp->flags = p->flags;
1085 xp->family = p->sel.family;
1086 /* XXX xp->share = p->share; */
1089 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1091 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1092 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1093 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1094 p->priority = xp->priority;
1095 p->index = xp->index;
1096 p->sel.family = xp->family;
1098 p->action = xp->action;
1099 p->flags = xp->flags;
1100 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1103 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1105 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1113 copy_from_user_policy(xp, p);
1115 err = copy_from_user_policy_type(&xp->type, xfrma);
1119 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1120 err = copy_from_user_sec_ctx(xp, xfrma);
1131 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1132 struct rtattr **xfrma)
1134 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1135 struct xfrm_policy *xp;
1140 err = verify_newpolicy_info(p);
1143 err = verify_sec_ctx_len(xfrma);
1147 xp = xfrm_policy_construct(p, xfrma, &err);
1151 /* shouldnt excl be based on nlh flags??
1152 * Aha! this is anti-netlink really i.e more pfkey derived
1153 * in netlink excl is a flag and you wouldnt need
1154 * a type XFRM_MSG_UPDPOLICY - JHS */
1155 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1156 err = xfrm_policy_insert(p->dir, xp, excl);
1157 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1158 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1161 security_xfrm_policy_free(xp);
1166 c.event = nlh->nlmsg_type;
1167 c.seq = nlh->nlmsg_seq;
1168 c.pid = nlh->nlmsg_pid;
1169 km_policy_notify(xp, p->dir, &c);
1176 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1178 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1181 if (xp->xfrm_nr == 0)
1184 for (i = 0; i < xp->xfrm_nr; i++) {
1185 struct xfrm_user_tmpl *up = &vec[i];
1186 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1188 memcpy(&up->id, &kp->id, sizeof(up->id));
1189 up->family = kp->encap_family;
1190 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1191 up->reqid = kp->reqid;
1192 up->mode = kp->mode;
1193 up->share = kp->share;
1194 up->optional = kp->optional;
1195 up->aalgos = kp->aalgos;
1196 up->ealgos = kp->ealgos;
1197 up->calgos = kp->calgos;
1199 RTA_PUT(skb, XFRMA_TMPL,
1200 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1209 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1211 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1212 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1213 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1215 uctx->exttype = XFRMA_SEC_CTX;
1216 uctx->len = ctx_size;
1217 uctx->ctx_doi = s->ctx_doi;
1218 uctx->ctx_alg = s->ctx_alg;
1219 uctx->ctx_len = s->ctx_len;
1220 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1227 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1230 return copy_sec_ctx(x->security, skb);
1235 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1238 return copy_sec_ctx(xp->security, skb);
1243 #ifdef CONFIG_XFRM_SUB_POLICY
1244 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1246 struct xfrm_userpolicy_type upt;
1248 memset(&upt, 0, sizeof(upt));
1251 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1260 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1266 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1268 struct xfrm_dump_info *sp = ptr;
1269 struct xfrm_userpolicy_info *p;
1270 struct sk_buff *in_skb = sp->in_skb;
1271 struct sk_buff *skb = sp->out_skb;
1272 struct nlmsghdr *nlh;
1273 unsigned char *b = skb_tail_pointer(skb);
1275 if (sp->this_idx < sp->start_idx)
1278 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1279 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1282 p = NLMSG_DATA(nlh);
1284 copy_to_user_policy(xp, p, dir);
1285 if (copy_to_user_tmpl(xp, skb) < 0)
1287 if (copy_to_user_sec_ctx(xp, skb))
1289 if (copy_to_user_policy_type(xp->type, skb) < 0)
1292 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1302 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1304 struct xfrm_dump_info info;
1306 info.in_skb = cb->skb;
1308 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1309 info.nlmsg_flags = NLM_F_MULTI;
1311 info.start_idx = cb->args[0];
1312 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1313 #ifdef CONFIG_XFRM_SUB_POLICY
1314 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1316 cb->args[0] = info.this_idx;
1321 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1322 struct xfrm_policy *xp,
1325 struct xfrm_dump_info info;
1326 struct sk_buff *skb;
1328 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1330 return ERR_PTR(-ENOMEM);
1332 info.in_skb = in_skb;
1334 info.nlmsg_seq = seq;
1335 info.nlmsg_flags = 0;
1336 info.this_idx = info.start_idx = 0;
1338 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1346 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1347 struct rtattr **xfrma)
1349 struct xfrm_policy *xp;
1350 struct xfrm_userpolicy_id *p;
1351 u8 type = XFRM_POLICY_TYPE_MAIN;
1356 p = NLMSG_DATA(nlh);
1357 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1359 err = copy_from_user_policy_type(&type, xfrma);
1363 err = verify_policy_dir(p->dir);
1368 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1370 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1371 struct xfrm_policy tmp;
1373 err = verify_sec_ctx_len(xfrma);
1377 memset(&tmp, 0, sizeof(struct xfrm_policy));
1379 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1381 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1384 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1386 security_xfrm_policy_free(&tmp);
1392 struct sk_buff *resp_skb;
1394 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1395 if (IS_ERR(resp_skb)) {
1396 err = PTR_ERR(resp_skb);
1398 err = netlink_unicast(xfrm_nl, resp_skb,
1399 NETLINK_CB(skb).pid,
1403 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1404 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1409 c.data.byid = p->index;
1410 c.event = nlh->nlmsg_type;
1411 c.seq = nlh->nlmsg_seq;
1412 c.pid = nlh->nlmsg_pid;
1413 km_policy_notify(xp, p->dir, &c);
1421 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1422 struct rtattr **xfrma)
1425 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1426 struct xfrm_audit audit_info;
1429 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1430 audit_info.secid = NETLINK_CB(skb).sid;
1431 err = xfrm_state_flush(p->proto, &audit_info);
1434 c.data.proto = p->proto;
1435 c.event = nlh->nlmsg_type;
1436 c.seq = nlh->nlmsg_seq;
1437 c.pid = nlh->nlmsg_pid;
1438 km_state_notify(NULL, &c);
1444 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1446 struct xfrm_aevent_id *id;
1447 struct nlmsghdr *nlh;
1448 struct xfrm_lifetime_cur ltime;
1449 unsigned char *b = skb_tail_pointer(skb);
1451 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1454 id = NLMSG_DATA(nlh);
1456 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1457 id->sa_id.spi = x->id.spi;
1458 id->sa_id.family = x->props.family;
1459 id->sa_id.proto = x->id.proto;
1460 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1461 id->reqid = x->props.reqid;
1462 id->flags = c->data.aevent;
1464 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1466 ltime.bytes = x->curlft.bytes;
1467 ltime.packets = x->curlft.packets;
1468 ltime.add_time = x->curlft.add_time;
1469 ltime.use_time = x->curlft.use_time;
1471 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1473 if (id->flags&XFRM_AE_RTHR) {
1474 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1477 if (id->flags&XFRM_AE_ETHR) {
1478 u32 etimer = x->replay_maxage*10/HZ;
1479 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1482 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1490 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1491 struct rtattr **xfrma)
1493 struct xfrm_state *x;
1494 struct sk_buff *r_skb;
1497 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1498 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1499 struct xfrm_usersa_id *id = &p->sa_id;
1501 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1502 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1504 if (p->flags&XFRM_AE_RTHR)
1505 len+=RTA_SPACE(sizeof(u32));
1507 if (p->flags&XFRM_AE_ETHR)
1508 len+=RTA_SPACE(sizeof(u32));
1510 r_skb = alloc_skb(len, GFP_ATOMIC);
1514 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1521 * XXX: is this lock really needed - none of the other
1522 * gets lock (the concern is things getting updated
1523 * while we are still reading) - jhs
1525 spin_lock_bh(&x->lock);
1526 c.data.aevent = p->flags;
1527 c.seq = nlh->nlmsg_seq;
1528 c.pid = nlh->nlmsg_pid;
1530 if (build_aevent(r_skb, x, &c) < 0)
1532 err = netlink_unicast(xfrm_nl, r_skb,
1533 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1534 spin_unlock_bh(&x->lock);
1539 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1540 struct rtattr **xfrma)
1542 struct xfrm_state *x;
1545 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1546 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1547 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1552 /* pedantic mode - thou shalt sayeth replaceth */
1553 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1556 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1560 if (x->km.state != XFRM_STATE_VALID)
1563 spin_lock_bh(&x->lock);
1564 err = xfrm_update_ae_params(x, xfrma);
1565 spin_unlock_bh(&x->lock);
1569 c.event = nlh->nlmsg_type;
1570 c.seq = nlh->nlmsg_seq;
1571 c.pid = nlh->nlmsg_pid;
1572 c.data.aevent = XFRM_AE_CU;
1573 km_state_notify(x, &c);
1580 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1581 struct rtattr **xfrma)
1584 u8 type = XFRM_POLICY_TYPE_MAIN;
1586 struct xfrm_audit audit_info;
1588 err = copy_from_user_policy_type(&type, xfrma);
1592 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1593 audit_info.secid = NETLINK_CB(skb).sid;
1594 err = xfrm_policy_flush(type, &audit_info);
1598 c.event = nlh->nlmsg_type;
1599 c.seq = nlh->nlmsg_seq;
1600 c.pid = nlh->nlmsg_pid;
1601 km_policy_notify(NULL, 0, &c);
1605 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1606 struct rtattr **xfrma)
1608 struct xfrm_policy *xp;
1609 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1610 struct xfrm_userpolicy_info *p = &up->pol;
1611 u8 type = XFRM_POLICY_TYPE_MAIN;
1614 err = copy_from_user_policy_type(&type, xfrma);
1619 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1621 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1622 struct xfrm_policy tmp;
1624 err = verify_sec_ctx_len(xfrma);
1628 memset(&tmp, 0, sizeof(struct xfrm_policy));
1630 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1632 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1635 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1637 security_xfrm_policy_free(&tmp);
1642 read_lock(&xp->lock);
1644 read_unlock(&xp->lock);
1648 read_unlock(&xp->lock);
1651 xfrm_policy_delete(xp, p->dir);
1652 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1653 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1656 // reset the timers here?
1657 printk("Dont know what to do with soft policy expire\n");
1659 km_policy_expired(xp, p->dir, up->hard, current->pid);
1666 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1667 struct rtattr **xfrma)
1669 struct xfrm_state *x;
1671 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1672 struct xfrm_usersa_info *p = &ue->state;
1674 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1680 spin_lock_bh(&x->lock);
1682 if (x->km.state != XFRM_STATE_VALID)
1684 km_state_expired(x, ue->hard, current->pid);
1687 __xfrm_state_delete(x);
1688 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1689 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1693 spin_unlock_bh(&x->lock);
1698 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1699 struct rtattr **xfrma)
1701 struct xfrm_policy *xp;
1702 struct xfrm_user_tmpl *ut;
1704 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1706 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1707 struct xfrm_state *x = xfrm_state_alloc();
1713 err = verify_newpolicy_info(&ua->policy);
1715 printk("BAD policy passed\n");
1721 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1727 memcpy(&x->id, &ua->id, sizeof(ua->id));
1728 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1729 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1732 /* extract the templates and for each call km_key */
1733 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1734 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1735 memcpy(&x->id, &t->id, sizeof(x->id));
1736 x->props.mode = t->mode;
1737 x->props.reqid = t->reqid;
1738 x->props.family = ut->family;
1739 t->aalgos = ua->aalgos;
1740 t->ealgos = ua->ealgos;
1741 t->calgos = ua->calgos;
1742 err = km_query(x, t, xp);
1752 #ifdef CONFIG_XFRM_MIGRATE
1753 static int verify_user_migrate(struct rtattr **xfrma)
1755 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1756 struct xfrm_user_migrate *um;
1761 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1767 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1768 struct rtattr **xfrma, int *num)
1770 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1771 struct xfrm_user_migrate *um;
1775 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1777 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1780 for (i = 0; i < num_migrate; i++, um++, ma++) {
1781 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1782 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1783 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1784 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1786 ma->proto = um->proto;
1787 ma->mode = um->mode;
1788 ma->reqid = um->reqid;
1790 ma->old_family = um->old_family;
1791 ma->new_family = um->new_family;
1798 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1799 struct rtattr **xfrma)
1801 struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
1802 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1807 err = verify_user_migrate((struct rtattr **)xfrma);
1811 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1815 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1816 (struct rtattr **)xfrma, &n);
1823 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1828 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1829 struct rtattr **xfrma)
1831 return -ENOPROTOOPT;
1835 #ifdef CONFIG_XFRM_MIGRATE
1836 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1838 struct xfrm_user_migrate um;
1840 memset(&um, 0, sizeof(um));
1841 um.proto = m->proto;
1843 um.reqid = m->reqid;
1844 um.old_family = m->old_family;
1845 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1846 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1847 um.new_family = m->new_family;
1848 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1849 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1851 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1858 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1859 int num_migrate, struct xfrm_selector *sel,
1862 struct xfrm_migrate *mp;
1863 struct xfrm_userpolicy_id *pol_id;
1864 struct nlmsghdr *nlh;
1865 unsigned char *b = skb_tail_pointer(skb);
1868 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1871 pol_id = NLMSG_DATA(nlh);
1873 /* copy data from selector, dir, and type to the pol_id */
1874 memset(pol_id, 0, sizeof(*pol_id));
1875 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1878 if (copy_to_user_policy_type(type, skb) < 0)
1881 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1882 if (copy_to_user_migrate(mp, skb) < 0)
1886 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1893 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1894 struct xfrm_migrate *m, int num_migrate)
1896 struct sk_buff *skb;
1899 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1900 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1901 #ifdef CONFIG_XFRM_SUB_POLICY
1902 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1904 skb = alloc_skb(len, GFP_ATOMIC);
1909 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1912 NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
1913 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
1917 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1918 struct xfrm_migrate *m, int num_migrate)
1920 return -ENOPROTOOPT;
1924 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1926 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1927 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1928 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1929 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1930 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1931 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1932 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1933 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1934 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1935 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1936 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1937 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1938 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1939 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1940 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1941 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1942 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1943 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1944 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1945 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1946 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1951 static struct xfrm_link {
1952 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1953 int (*dump)(struct sk_buff *, struct netlink_callback *);
1954 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1955 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1956 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1957 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1958 .dump = xfrm_dump_sa },
1959 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1960 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1961 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1962 .dump = xfrm_dump_policy },
1963 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1964 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1965 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1966 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1967 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1968 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1969 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1970 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1971 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1972 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1973 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1974 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1975 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1978 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1980 struct rtattr *xfrma[XFRMA_MAX];
1981 struct xfrm_link *link;
1984 type = nlh->nlmsg_type;
1985 if (type > XFRM_MSG_MAX)
1988 type -= XFRM_MSG_BASE;
1989 link = &xfrm_dispatch[type];
1991 /* All operations require privileges, even GET */
1992 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1995 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1996 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1997 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1998 if (link->dump == NULL)
2001 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
2004 memset(xfrma, 0, sizeof(xfrma));
2006 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
2009 if (nlh->nlmsg_len > min_len) {
2010 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2011 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
2013 while (RTA_OK(attr, attrlen)) {
2014 unsigned short flavor = attr->rta_type;
2016 if (flavor > XFRMA_MAX)
2018 xfrma[flavor - 1] = attr;
2020 attr = RTA_NEXT(attr, attrlen);
2024 if (link->doit == NULL)
2027 return link->doit(skb, nlh, xfrma);
2030 static void xfrm_netlink_rcv(struct sock *sk, int len)
2032 unsigned int qlen = 0;
2035 mutex_lock(&xfrm_cfg_mutex);
2036 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2037 mutex_unlock(&xfrm_cfg_mutex);
2042 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2044 struct xfrm_user_expire *ue;
2045 struct nlmsghdr *nlh;
2046 unsigned char *b = skb_tail_pointer(skb);
2048 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2051 ue = NLMSG_DATA(nlh);
2053 copy_to_user_state(x, &ue->state);
2054 ue->hard = (c->data.hard != 0) ? 1 : 0;
2056 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2060 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2062 struct sk_buff *skb;
2063 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2065 skb = alloc_skb(len, GFP_ATOMIC);
2069 if (build_expire(skb, x, c) < 0)
2072 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2073 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2076 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2078 struct sk_buff *skb;
2079 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2081 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2082 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2083 skb = alloc_skb(len, GFP_ATOMIC);
2087 if (build_aevent(skb, x, c) < 0)
2090 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
2091 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2094 static int xfrm_notify_sa_flush(struct km_event *c)
2096 struct xfrm_usersa_flush *p;
2097 struct nlmsghdr *nlh;
2098 struct sk_buff *skb;
2100 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2102 skb = alloc_skb(len, GFP_ATOMIC);
2107 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2113 p = NLMSG_DATA(nlh);
2114 p->proto = c->data.proto;
2116 nlh->nlmsg_len = skb->tail - b;
2118 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2119 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2122 static inline int xfrm_sa_len(struct xfrm_state *x)
2126 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2128 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2130 l += RTA_SPACE(sizeof(*x->calg));
2132 l += RTA_SPACE(sizeof(*x->encap));
2137 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2139 struct xfrm_usersa_info *p;
2140 struct xfrm_usersa_id *id;
2141 struct nlmsghdr *nlh;
2142 struct sk_buff *skb;
2144 int len = xfrm_sa_len(x);
2147 headlen = sizeof(*p);
2148 if (c->event == XFRM_MSG_DELSA) {
2149 len += RTA_SPACE(headlen);
2150 headlen = sizeof(*id);
2152 len += NLMSG_SPACE(headlen);
2154 skb = alloc_skb(len, GFP_ATOMIC);
2159 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2163 p = NLMSG_DATA(nlh);
2164 if (c->event == XFRM_MSG_DELSA) {
2165 id = NLMSG_DATA(nlh);
2166 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2167 id->spi = x->id.spi;
2168 id->family = x->props.family;
2169 id->proto = x->id.proto;
2171 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2174 copy_to_user_state(x, p);
2177 RTA_PUT(skb, XFRMA_ALG_AUTH,
2178 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2180 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2181 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2183 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2186 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2188 nlh->nlmsg_len = skb->tail - b;
2190 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2191 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2199 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2203 case XFRM_MSG_EXPIRE:
2204 return xfrm_exp_state_notify(x, c);
2205 case XFRM_MSG_NEWAE:
2206 return xfrm_aevent_state_notify(x, c);
2207 case XFRM_MSG_DELSA:
2208 case XFRM_MSG_UPDSA:
2209 case XFRM_MSG_NEWSA:
2210 return xfrm_notify_sa(x, c);
2211 case XFRM_MSG_FLUSHSA:
2212 return xfrm_notify_sa_flush(c);
2214 printk("xfrm_user: Unknown SA event %d\n", c->event);
2222 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2223 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2226 struct xfrm_user_acquire *ua;
2227 struct nlmsghdr *nlh;
2228 unsigned char *b = skb_tail_pointer(skb);
2229 __u32 seq = xfrm_get_acqseq();
2231 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2234 ua = NLMSG_DATA(nlh);
2236 memcpy(&ua->id, &x->id, sizeof(ua->id));
2237 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2238 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2239 copy_to_user_policy(xp, &ua->policy, dir);
2240 ua->aalgos = xt->aalgos;
2241 ua->ealgos = xt->ealgos;
2242 ua->calgos = xt->calgos;
2243 ua->seq = x->km.seq = seq;
2245 if (copy_to_user_tmpl(xp, skb) < 0)
2247 if (copy_to_user_state_sec_ctx(x, skb))
2249 if (copy_to_user_policy_type(xp->type, skb) < 0)
2252 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2260 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2261 struct xfrm_policy *xp, int dir)
2263 struct sk_buff *skb;
2266 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2267 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2268 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2269 #ifdef CONFIG_XFRM_SUB_POLICY
2270 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2272 skb = alloc_skb(len, GFP_ATOMIC);
2276 if (build_acquire(skb, x, xt, xp, dir) < 0)
2279 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2280 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2283 /* User gives us xfrm_user_policy_info followed by an array of 0
2284 * or more templates.
2286 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2287 u8 *data, int len, int *dir)
2289 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2290 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2291 struct xfrm_policy *xp;
2294 switch (sk->sk_family) {
2296 if (opt != IP_XFRM_POLICY) {
2301 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2303 if (opt != IPV6_XFRM_POLICY) {
2316 if (len < sizeof(*p) ||
2317 verify_newpolicy_info(p))
2320 nr = ((len - sizeof(*p)) / sizeof(*ut));
2321 if (validate_tmpl(nr, ut, p->sel.family))
2324 if (p->dir > XFRM_POLICY_OUT)
2327 xp = xfrm_policy_alloc(GFP_KERNEL);
2333 copy_from_user_policy(xp, p);
2334 xp->type = XFRM_POLICY_TYPE_MAIN;
2335 copy_templates(xp, ut, nr);
2342 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2343 int dir, struct km_event *c)
2345 struct xfrm_user_polexpire *upe;
2346 struct nlmsghdr *nlh;
2347 int hard = c->data.hard;
2348 unsigned char *b = skb_tail_pointer(skb);
2350 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2353 upe = NLMSG_DATA(nlh);
2355 copy_to_user_policy(xp, &upe->pol, dir);
2356 if (copy_to_user_tmpl(xp, skb) < 0)
2358 if (copy_to_user_sec_ctx(xp, skb))
2360 if (copy_to_user_policy_type(xp->type, skb) < 0)
2364 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2372 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2374 struct sk_buff *skb;
2377 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2378 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2379 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2380 #ifdef CONFIG_XFRM_SUB_POLICY
2381 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2383 skb = alloc_skb(len, GFP_ATOMIC);
2387 if (build_polexpire(skb, xp, dir, c) < 0)
2390 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2391 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2394 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2396 struct xfrm_userpolicy_info *p;
2397 struct xfrm_userpolicy_id *id;
2398 struct nlmsghdr *nlh;
2399 struct sk_buff *skb;
2401 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2404 headlen = sizeof(*p);
2405 if (c->event == XFRM_MSG_DELPOLICY) {
2406 len += RTA_SPACE(headlen);
2407 headlen = sizeof(*id);
2409 #ifdef CONFIG_XFRM_SUB_POLICY
2410 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2412 len += NLMSG_SPACE(headlen);
2414 skb = alloc_skb(len, GFP_ATOMIC);
2419 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2423 p = NLMSG_DATA(nlh);
2424 if (c->event == XFRM_MSG_DELPOLICY) {
2425 id = NLMSG_DATA(nlh);
2426 memset(id, 0, sizeof(*id));
2429 id->index = xp->index;
2431 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2433 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2436 copy_to_user_policy(xp, p, dir);
2437 if (copy_to_user_tmpl(xp, skb) < 0)
2439 if (copy_to_user_policy_type(xp->type, skb) < 0)
2442 nlh->nlmsg_len = skb->tail - b;
2444 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2445 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2453 static int xfrm_notify_policy_flush(struct km_event *c)
2455 struct nlmsghdr *nlh;
2456 struct sk_buff *skb;
2459 #ifdef CONFIG_XFRM_SUB_POLICY
2460 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2462 len += NLMSG_LENGTH(0);
2464 skb = alloc_skb(len, GFP_ATOMIC);
2470 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2473 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2476 nlh->nlmsg_len = skb->tail - b;
2478 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2479 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2486 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2490 case XFRM_MSG_NEWPOLICY:
2491 case XFRM_MSG_UPDPOLICY:
2492 case XFRM_MSG_DELPOLICY:
2493 return xfrm_notify_policy(xp, dir, c);
2494 case XFRM_MSG_FLUSHPOLICY:
2495 return xfrm_notify_policy_flush(c);
2496 case XFRM_MSG_POLEXPIRE:
2497 return xfrm_exp_policy_notify(xp, dir, c);
2499 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2506 static int build_report(struct sk_buff *skb, u8 proto,
2507 struct xfrm_selector *sel, xfrm_address_t *addr)
2509 struct xfrm_user_report *ur;
2510 struct nlmsghdr *nlh;
2511 unsigned char *b = skb_tail_pointer(skb);
2513 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2516 ur = NLMSG_DATA(nlh);
2519 memcpy(&ur->sel, sel, sizeof(ur->sel));
2522 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2524 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2532 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2533 xfrm_address_t *addr)
2535 struct sk_buff *skb;
2538 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2539 skb = alloc_skb(len, GFP_ATOMIC);
2543 if (build_report(skb, proto, sel, addr) < 0)
2546 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2547 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2550 static struct xfrm_mgr netlink_mgr = {
2552 .notify = xfrm_send_state_notify,
2553 .acquire = xfrm_send_acquire,
2554 .compile_policy = xfrm_compile_policy,
2555 .notify_policy = xfrm_send_policy_notify,
2556 .report = xfrm_send_report,
2557 .migrate = xfrm_send_migrate,
2560 static int __init xfrm_user_init(void)
2564 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2566 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2567 xfrm_netlink_rcv, NULL, THIS_MODULE);
2570 rcu_assign_pointer(xfrm_nl, nlsk);
2572 xfrm_register_km(&netlink_mgr);
2577 static void __exit xfrm_user_exit(void)
2579 struct sock *nlsk = xfrm_nl;
2581 xfrm_unregister_km(&netlink_mgr);
2582 rcu_assign_pointer(xfrm_nl, NULL);
2584 sock_release(nlsk->sk_socket);
2587 module_init(xfrm_user_init);
2588 module_exit(xfrm_user_exit);
2589 MODULE_LICENSE("GPL");
2590 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);