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 inline int alg_len(struct xfrm_algo *alg)
38 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
41 static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
43 struct rtattr *rt = xfrma[type - 1];
44 struct xfrm_algo *algp;
50 len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp);
56 len -= (algp->alg_key_len + 7U) / 8;
62 if (!algp->alg_key_len &&
63 strcmp(algp->alg_name, "digest_null") != 0)
68 if (!algp->alg_key_len &&
69 strcmp(algp->alg_name, "cipher_null") != 0)
74 /* Zero length keys are legal. */
81 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
85 static int verify_encap_tmpl(struct rtattr **xfrma)
87 struct rtattr *rt = xfrma[XFRMA_ENCAP - 1];
88 struct xfrm_encap_tmpl *encap;
93 if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap))
99 static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
100 xfrm_address_t **addrp)
102 struct rtattr *rt = xfrma[type - 1];
107 if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
111 *addrp = RTA_DATA(rt);
116 static inline int verify_sec_ctx_len(struct rtattr **xfrma)
118 struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
119 struct xfrm_user_sec_ctx *uctx;
125 if (rt->rta_len < sizeof(*uctx))
130 len += sizeof(struct xfrm_user_sec_ctx);
131 len += uctx->ctx_len;
133 if (uctx->len != len)
140 static int verify_newsa_info(struct xfrm_usersa_info *p,
141 struct rtattr **xfrma)
151 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
163 switch (p->id.proto) {
165 if (!xfrma[XFRMA_ALG_AUTH-1] ||
166 xfrma[XFRMA_ALG_CRYPT-1] ||
167 xfrma[XFRMA_ALG_COMP-1])
172 if ((!xfrma[XFRMA_ALG_AUTH-1] &&
173 !xfrma[XFRMA_ALG_CRYPT-1]) ||
174 xfrma[XFRMA_ALG_COMP-1])
179 if (!xfrma[XFRMA_ALG_COMP-1] ||
180 xfrma[XFRMA_ALG_AUTH-1] ||
181 xfrma[XFRMA_ALG_CRYPT-1])
185 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
186 case IPPROTO_DSTOPTS:
187 case IPPROTO_ROUTING:
188 if (xfrma[XFRMA_ALG_COMP-1] ||
189 xfrma[XFRMA_ALG_AUTH-1] ||
190 xfrma[XFRMA_ALG_CRYPT-1] ||
191 xfrma[XFRMA_ENCAP-1] ||
192 xfrma[XFRMA_SEC_CTX-1] ||
193 !xfrma[XFRMA_COADDR-1])
202 if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH)))
204 if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT)))
206 if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP)))
208 if ((err = verify_encap_tmpl(xfrma)))
210 if ((err = verify_sec_ctx_len(xfrma)))
212 if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
217 case XFRM_MODE_TRANSPORT:
218 case XFRM_MODE_TUNNEL:
219 case XFRM_MODE_ROUTEOPTIMIZATION:
233 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
234 struct xfrm_algo_desc *(*get_byname)(char *, int),
235 struct rtattr *u_arg)
237 struct rtattr *rta = u_arg;
238 struct xfrm_algo *p, *ualg;
239 struct xfrm_algo_desc *algo;
244 ualg = RTA_DATA(rta);
246 algo = get_byname(ualg->alg_name, 1);
249 *props = algo->desc.sadb_alg_id;
251 p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
255 strcpy(p->alg_name, algo->name);
260 static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
262 struct rtattr *rta = u_arg;
263 struct xfrm_encap_tmpl *p, *uencap;
268 uencap = RTA_DATA(rta);
269 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
278 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
283 len += sizeof(struct xfrm_user_sec_ctx);
284 len += xfrm_ctx->ctx_len;
289 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
291 struct xfrm_user_sec_ctx *uctx;
296 uctx = RTA_DATA(u_arg);
297 return security_xfrm_state_alloc(x, uctx);
300 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
302 struct rtattr *rta = u_arg;
303 xfrm_address_t *p, *uaddrp;
308 uaddrp = RTA_DATA(rta);
309 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
317 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
319 memcpy(&x->id, &p->id, sizeof(x->id));
320 memcpy(&x->sel, &p->sel, sizeof(x->sel));
321 memcpy(&x->lft, &p->lft, sizeof(x->lft));
322 x->props.mode = p->mode;
323 x->props.replay_window = p->replay_window;
324 x->props.reqid = p->reqid;
325 x->props.family = p->family;
326 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
327 x->props.flags = p->flags;
330 * Set inner address family if the KM left it as zero.
331 * See comment in validate_tmpl.
334 x->sel.family = p->family;
338 * someday when pfkey also has support, we could have the code
339 * somehow made shareable and move it to xfrm_state.c - JHS
342 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
345 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
346 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
347 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
348 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
351 struct xfrm_replay_state *replay;
352 if (RTA_PAYLOAD(rp) < sizeof(*replay))
354 replay = RTA_DATA(rp);
355 memcpy(&x->replay, replay, sizeof(*replay));
356 memcpy(&x->preplay, replay, sizeof(*replay));
360 struct xfrm_lifetime_cur *ltime;
361 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
363 ltime = RTA_DATA(lt);
364 x->curlft.bytes = ltime->bytes;
365 x->curlft.packets = ltime->packets;
366 x->curlft.add_time = ltime->add_time;
367 x->curlft.use_time = ltime->use_time;
371 if (RTA_PAYLOAD(et) < sizeof(u32))
373 x->replay_maxage = *(u32*)RTA_DATA(et);
377 if (RTA_PAYLOAD(rt) < sizeof(u32))
379 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
387 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
388 struct rtattr **xfrma,
391 struct xfrm_state *x = xfrm_state_alloc();
397 copy_from_user_state(x, p);
399 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
400 xfrm_aalg_get_byname,
401 xfrma[XFRMA_ALG_AUTH-1])))
403 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
404 xfrm_ealg_get_byname,
405 xfrma[XFRMA_ALG_CRYPT-1])))
407 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
408 xfrm_calg_get_byname,
409 xfrma[XFRMA_ALG_COMP-1])))
411 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
413 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
415 err = xfrm_init_state(x);
419 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
423 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
424 /* sysctl_xfrm_aevent_etime is in 100ms units */
425 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
426 x->preplay.bitmap = 0;
427 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
428 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
430 /* override default values from above */
432 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
439 x->km.state = XFRM_STATE_DEAD;
446 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
447 struct rtattr **xfrma)
449 struct xfrm_usersa_info *p = nlmsg_data(nlh);
450 struct xfrm_state *x;
454 err = verify_newsa_info(p, xfrma);
458 x = xfrm_state_construct(p, xfrma, &err);
463 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
464 err = xfrm_state_add(x);
466 err = xfrm_state_update(x);
468 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
469 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
472 x->km.state = XFRM_STATE_DEAD;
477 c.seq = nlh->nlmsg_seq;
478 c.pid = nlh->nlmsg_pid;
479 c.event = nlh->nlmsg_type;
481 km_state_notify(x, &c);
487 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
488 struct rtattr **xfrma,
491 struct xfrm_state *x = NULL;
494 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
496 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
498 xfrm_address_t *saddr = NULL;
500 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
510 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
520 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
521 struct rtattr **xfrma)
523 struct xfrm_state *x;
526 struct xfrm_usersa_id *p = nlmsg_data(nlh);
528 x = xfrm_user_state_lookup(p, xfrma, &err);
532 if ((err = security_xfrm_state_delete(x)) != 0)
535 if (xfrm_state_kern(x)) {
540 err = xfrm_state_delete(x);
545 c.seq = nlh->nlmsg_seq;
546 c.pid = nlh->nlmsg_pid;
547 c.event = nlh->nlmsg_type;
548 km_state_notify(x, &c);
551 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
552 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
557 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
559 memcpy(&p->id, &x->id, sizeof(p->id));
560 memcpy(&p->sel, &x->sel, sizeof(p->sel));
561 memcpy(&p->lft, &x->lft, sizeof(p->lft));
562 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
563 memcpy(&p->stats, &x->stats, sizeof(p->stats));
564 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
565 p->mode = x->props.mode;
566 p->replay_window = x->props.replay_window;
567 p->reqid = x->props.reqid;
568 p->family = x->props.family;
569 p->flags = x->props.flags;
573 struct xfrm_dump_info {
574 struct sk_buff *in_skb;
575 struct sk_buff *out_skb;
582 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
584 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
585 struct xfrm_user_sec_ctx *uctx;
588 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
592 uctx = nla_data(attr);
593 uctx->exttype = XFRMA_SEC_CTX;
594 uctx->len = ctx_size;
595 uctx->ctx_doi = s->ctx_doi;
596 uctx->ctx_alg = s->ctx_alg;
597 uctx->ctx_len = s->ctx_len;
598 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
603 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
605 struct xfrm_dump_info *sp = ptr;
606 struct sk_buff *in_skb = sp->in_skb;
607 struct sk_buff *skb = sp->out_skb;
608 struct xfrm_usersa_info *p;
609 struct nlmsghdr *nlh;
611 if (sp->this_idx < sp->start_idx)
614 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
615 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
620 copy_to_user_state(x, p);
623 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
625 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
627 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
630 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
632 if (x->security && copy_sec_ctx(x->security, skb) < 0)
633 goto nla_put_failure;
636 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
639 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
647 nlmsg_cancel(skb, nlh);
651 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
653 struct xfrm_dump_info info;
655 info.in_skb = cb->skb;
657 info.nlmsg_seq = cb->nlh->nlmsg_seq;
658 info.nlmsg_flags = NLM_F_MULTI;
660 info.start_idx = cb->args[0];
661 (void) xfrm_state_walk(0, dump_one_state, &info);
662 cb->args[0] = info.this_idx;
667 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
668 struct xfrm_state *x, u32 seq)
670 struct xfrm_dump_info info;
673 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
675 return ERR_PTR(-ENOMEM);
677 info.in_skb = in_skb;
679 info.nlmsg_seq = seq;
680 info.nlmsg_flags = 0;
681 info.this_idx = info.start_idx = 0;
683 if (dump_one_state(x, 0, &info)) {
691 static inline size_t xfrm_spdinfo_msgsize(void)
693 return NLMSG_ALIGN(4)
694 + nla_total_size(sizeof(struct xfrmu_spdinfo))
695 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
698 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
700 struct xfrmk_spdinfo si;
701 struct xfrmu_spdinfo spc;
702 struct xfrmu_spdhinfo sph;
703 struct nlmsghdr *nlh;
706 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
707 if (nlh == NULL) /* shouldnt really happen ... */
712 xfrm_spd_getinfo(&si);
713 spc.incnt = si.incnt;
714 spc.outcnt = si.outcnt;
715 spc.fwdcnt = si.fwdcnt;
716 spc.inscnt = si.inscnt;
717 spc.outscnt = si.outscnt;
718 spc.fwdscnt = si.fwdscnt;
719 sph.spdhcnt = si.spdhcnt;
720 sph.spdhmcnt = si.spdhmcnt;
722 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
723 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
725 return nlmsg_end(skb, nlh);
728 nlmsg_cancel(skb, nlh);
732 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
733 struct rtattr **xfrma)
735 struct sk_buff *r_skb;
736 u32 *flags = nlmsg_data(nlh);
737 u32 spid = NETLINK_CB(skb).pid;
738 u32 seq = nlh->nlmsg_seq;
740 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
744 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
747 return nlmsg_unicast(xfrm_nl, r_skb, spid);
750 static inline size_t xfrm_sadinfo_msgsize(void)
752 return NLMSG_ALIGN(4)
753 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
754 + nla_total_size(4); /* XFRMA_SAD_CNT */
757 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
759 struct xfrmk_sadinfo si;
760 struct xfrmu_sadhinfo sh;
761 struct nlmsghdr *nlh;
764 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
765 if (nlh == NULL) /* shouldnt really happen ... */
770 xfrm_sad_getinfo(&si);
772 sh.sadhmcnt = si.sadhmcnt;
773 sh.sadhcnt = si.sadhcnt;
775 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
776 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
778 return nlmsg_end(skb, nlh);
781 nlmsg_cancel(skb, nlh);
785 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
786 struct rtattr **xfrma)
788 struct sk_buff *r_skb;
789 u32 *flags = nlmsg_data(nlh);
790 u32 spid = NETLINK_CB(skb).pid;
791 u32 seq = nlh->nlmsg_seq;
793 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
797 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
800 return nlmsg_unicast(xfrm_nl, r_skb, spid);
803 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
804 struct rtattr **xfrma)
806 struct xfrm_usersa_id *p = nlmsg_data(nlh);
807 struct xfrm_state *x;
808 struct sk_buff *resp_skb;
811 x = xfrm_user_state_lookup(p, xfrma, &err);
815 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
816 if (IS_ERR(resp_skb)) {
817 err = PTR_ERR(resp_skb);
819 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
826 static int verify_userspi_info(struct xfrm_userspi_info *p)
828 switch (p->info.id.proto) {
834 /* IPCOMP spi is 16-bits. */
835 if (p->max >= 0x10000)
849 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
850 struct rtattr **xfrma)
852 struct xfrm_state *x;
853 struct xfrm_userspi_info *p;
854 struct sk_buff *resp_skb;
855 xfrm_address_t *daddr;
860 err = verify_userspi_info(p);
864 family = p->info.family;
865 daddr = &p->info.id.daddr;
869 x = xfrm_find_acq_byseq(p->info.seq);
870 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
877 x = xfrm_find_acq(p->info.mode, p->info.reqid,
878 p->info.id.proto, daddr,
885 resp_skb = ERR_PTR(-ENOENT);
887 spin_lock_bh(&x->lock);
888 if (x->km.state != XFRM_STATE_DEAD) {
889 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
891 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
893 spin_unlock_bh(&x->lock);
895 if (IS_ERR(resp_skb)) {
896 err = PTR_ERR(resp_skb);
900 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
908 static int verify_policy_dir(u8 dir)
912 case XFRM_POLICY_OUT:
913 case XFRM_POLICY_FWD:
923 static int verify_policy_type(u8 type)
926 case XFRM_POLICY_TYPE_MAIN:
927 #ifdef CONFIG_XFRM_SUB_POLICY
928 case XFRM_POLICY_TYPE_SUB:
939 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
943 case XFRM_SHARE_SESSION:
944 case XFRM_SHARE_USER:
945 case XFRM_SHARE_UNIQUE:
953 case XFRM_POLICY_ALLOW:
954 case XFRM_POLICY_BLOCK:
961 switch (p->sel.family) {
966 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
969 return -EAFNOSUPPORT;
976 return verify_policy_dir(p->dir);
979 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
981 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
982 struct xfrm_user_sec_ctx *uctx;
988 return security_xfrm_policy_alloc(pol, uctx);
991 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
997 for (i = 0; i < nr; i++, ut++) {
998 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1000 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1001 memcpy(&t->saddr, &ut->saddr,
1002 sizeof(xfrm_address_t));
1003 t->reqid = ut->reqid;
1005 t->share = ut->share;
1006 t->optional = ut->optional;
1007 t->aalgos = ut->aalgos;
1008 t->ealgos = ut->ealgos;
1009 t->calgos = ut->calgos;
1010 t->encap_family = ut->family;
1014 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1018 if (nr > XFRM_MAX_DEPTH)
1021 for (i = 0; i < nr; i++) {
1022 /* We never validated the ut->family value, so many
1023 * applications simply leave it at zero. The check was
1024 * never made and ut->family was ignored because all
1025 * templates could be assumed to have the same family as
1026 * the policy itself. Now that we will have ipv4-in-ipv6
1027 * and ipv6-in-ipv4 tunnels, this is no longer true.
1030 ut[i].family = family;
1032 switch (ut[i].family) {
1035 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1047 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1049 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1054 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1055 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1058 err = validate_tmpl(nr, utmpl, pol->family);
1062 copy_templates(pol, RTA_DATA(rt), nr);
1067 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1069 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1070 struct xfrm_userpolicy_type *upt;
1071 u8 type = XFRM_POLICY_TYPE_MAIN;
1075 if (rt->rta_len < sizeof(*upt))
1082 err = verify_policy_type(type);
1090 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1092 xp->priority = p->priority;
1093 xp->index = p->index;
1094 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1095 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1096 xp->action = p->action;
1097 xp->flags = p->flags;
1098 xp->family = p->sel.family;
1099 /* XXX xp->share = p->share; */
1102 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1104 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1105 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1106 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1107 p->priority = xp->priority;
1108 p->index = xp->index;
1109 p->sel.family = xp->family;
1111 p->action = xp->action;
1112 p->flags = xp->flags;
1113 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1116 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1118 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1126 copy_from_user_policy(xp, p);
1128 err = copy_from_user_policy_type(&xp->type, xfrma);
1132 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1133 err = copy_from_user_sec_ctx(xp, xfrma);
1144 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1145 struct rtattr **xfrma)
1147 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1148 struct xfrm_policy *xp;
1153 err = verify_newpolicy_info(p);
1156 err = verify_sec_ctx_len(xfrma);
1160 xp = xfrm_policy_construct(p, xfrma, &err);
1164 /* shouldnt excl be based on nlh flags??
1165 * Aha! this is anti-netlink really i.e more pfkey derived
1166 * in netlink excl is a flag and you wouldnt need
1167 * a type XFRM_MSG_UPDPOLICY - JHS */
1168 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1169 err = xfrm_policy_insert(p->dir, xp, excl);
1170 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1171 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1174 security_xfrm_policy_free(xp);
1179 c.event = nlh->nlmsg_type;
1180 c.seq = nlh->nlmsg_seq;
1181 c.pid = nlh->nlmsg_pid;
1182 km_policy_notify(xp, p->dir, &c);
1189 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1191 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1194 if (xp->xfrm_nr == 0)
1197 for (i = 0; i < xp->xfrm_nr; i++) {
1198 struct xfrm_user_tmpl *up = &vec[i];
1199 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1201 memcpy(&up->id, &kp->id, sizeof(up->id));
1202 up->family = kp->encap_family;
1203 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1204 up->reqid = kp->reqid;
1205 up->mode = kp->mode;
1206 up->share = kp->share;
1207 up->optional = kp->optional;
1208 up->aalgos = kp->aalgos;
1209 up->ealgos = kp->ealgos;
1210 up->calgos = kp->calgos;
1213 return nla_put(skb, XFRMA_TMPL,
1214 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1217 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1220 return copy_sec_ctx(x->security, skb);
1225 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1228 return copy_sec_ctx(xp->security, skb);
1232 static inline size_t userpolicy_type_attrsize(void)
1234 #ifdef CONFIG_XFRM_SUB_POLICY
1235 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1241 #ifdef CONFIG_XFRM_SUB_POLICY
1242 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1244 struct xfrm_userpolicy_type upt = {
1248 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1252 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1258 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1260 struct xfrm_dump_info *sp = ptr;
1261 struct xfrm_userpolicy_info *p;
1262 struct sk_buff *in_skb = sp->in_skb;
1263 struct sk_buff *skb = sp->out_skb;
1264 struct nlmsghdr *nlh;
1266 if (sp->this_idx < sp->start_idx)
1269 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1270 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1274 p = nlmsg_data(nlh);
1275 copy_to_user_policy(xp, p, dir);
1276 if (copy_to_user_tmpl(xp, skb) < 0)
1278 if (copy_to_user_sec_ctx(xp, skb))
1280 if (copy_to_user_policy_type(xp->type, skb) < 0)
1283 nlmsg_end(skb, nlh);
1289 nlmsg_cancel(skb, nlh);
1293 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1295 struct xfrm_dump_info info;
1297 info.in_skb = cb->skb;
1299 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1300 info.nlmsg_flags = NLM_F_MULTI;
1302 info.start_idx = cb->args[0];
1303 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1304 #ifdef CONFIG_XFRM_SUB_POLICY
1305 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1307 cb->args[0] = info.this_idx;
1312 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1313 struct xfrm_policy *xp,
1316 struct xfrm_dump_info info;
1317 struct sk_buff *skb;
1319 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1321 return ERR_PTR(-ENOMEM);
1323 info.in_skb = in_skb;
1325 info.nlmsg_seq = seq;
1326 info.nlmsg_flags = 0;
1327 info.this_idx = info.start_idx = 0;
1329 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1337 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1338 struct rtattr **xfrma)
1340 struct xfrm_policy *xp;
1341 struct xfrm_userpolicy_id *p;
1342 u8 type = XFRM_POLICY_TYPE_MAIN;
1347 p = nlmsg_data(nlh);
1348 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1350 err = copy_from_user_policy_type(&type, xfrma);
1354 err = verify_policy_dir(p->dir);
1359 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1361 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1362 struct xfrm_policy tmp;
1364 err = verify_sec_ctx_len(xfrma);
1368 memset(&tmp, 0, sizeof(struct xfrm_policy));
1370 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1372 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1375 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1377 security_xfrm_policy_free(&tmp);
1383 struct sk_buff *resp_skb;
1385 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1386 if (IS_ERR(resp_skb)) {
1387 err = PTR_ERR(resp_skb);
1389 err = nlmsg_unicast(xfrm_nl, resp_skb,
1390 NETLINK_CB(skb).pid);
1393 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1394 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1399 c.data.byid = p->index;
1400 c.event = nlh->nlmsg_type;
1401 c.seq = nlh->nlmsg_seq;
1402 c.pid = nlh->nlmsg_pid;
1403 km_policy_notify(xp, p->dir, &c);
1411 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1412 struct rtattr **xfrma)
1415 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1416 struct xfrm_audit audit_info;
1419 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1420 audit_info.secid = NETLINK_CB(skb).sid;
1421 err = xfrm_state_flush(p->proto, &audit_info);
1424 c.data.proto = p->proto;
1425 c.event = nlh->nlmsg_type;
1426 c.seq = nlh->nlmsg_seq;
1427 c.pid = nlh->nlmsg_pid;
1428 km_state_notify(NULL, &c);
1433 static inline size_t xfrm_aevent_msgsize(void)
1435 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1436 + nla_total_size(sizeof(struct xfrm_replay_state))
1437 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1438 + nla_total_size(4) /* XFRM_AE_RTHR */
1439 + nla_total_size(4); /* XFRM_AE_ETHR */
1442 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1444 struct xfrm_aevent_id *id;
1445 struct nlmsghdr *nlh;
1447 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1451 id = nlmsg_data(nlh);
1452 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1453 id->sa_id.spi = x->id.spi;
1454 id->sa_id.family = x->props.family;
1455 id->sa_id.proto = x->id.proto;
1456 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1457 id->reqid = x->props.reqid;
1458 id->flags = c->data.aevent;
1460 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1461 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1463 if (id->flags & XFRM_AE_RTHR)
1464 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1466 if (id->flags & XFRM_AE_ETHR)
1467 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1468 x->replay_maxage * 10 / HZ);
1470 return nlmsg_end(skb, nlh);
1473 nlmsg_cancel(skb, nlh);
1477 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1478 struct rtattr **xfrma)
1480 struct xfrm_state *x;
1481 struct sk_buff *r_skb;
1484 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1485 struct xfrm_usersa_id *id = &p->sa_id;
1487 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1491 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1498 * XXX: is this lock really needed - none of the other
1499 * gets lock (the concern is things getting updated
1500 * while we are still reading) - jhs
1502 spin_lock_bh(&x->lock);
1503 c.data.aevent = p->flags;
1504 c.seq = nlh->nlmsg_seq;
1505 c.pid = nlh->nlmsg_pid;
1507 if (build_aevent(r_skb, x, &c) < 0)
1509 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1510 spin_unlock_bh(&x->lock);
1515 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1516 struct rtattr **xfrma)
1518 struct xfrm_state *x;
1521 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1522 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1523 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1528 /* pedantic mode - thou shalt sayeth replaceth */
1529 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1532 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1536 if (x->km.state != XFRM_STATE_VALID)
1539 spin_lock_bh(&x->lock);
1540 err = xfrm_update_ae_params(x, xfrma);
1541 spin_unlock_bh(&x->lock);
1545 c.event = nlh->nlmsg_type;
1546 c.seq = nlh->nlmsg_seq;
1547 c.pid = nlh->nlmsg_pid;
1548 c.data.aevent = XFRM_AE_CU;
1549 km_state_notify(x, &c);
1556 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1557 struct rtattr **xfrma)
1560 u8 type = XFRM_POLICY_TYPE_MAIN;
1562 struct xfrm_audit audit_info;
1564 err = copy_from_user_policy_type(&type, xfrma);
1568 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1569 audit_info.secid = NETLINK_CB(skb).sid;
1570 err = xfrm_policy_flush(type, &audit_info);
1574 c.event = nlh->nlmsg_type;
1575 c.seq = nlh->nlmsg_seq;
1576 c.pid = nlh->nlmsg_pid;
1577 km_policy_notify(NULL, 0, &c);
1581 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1582 struct rtattr **xfrma)
1584 struct xfrm_policy *xp;
1585 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1586 struct xfrm_userpolicy_info *p = &up->pol;
1587 u8 type = XFRM_POLICY_TYPE_MAIN;
1590 err = copy_from_user_policy_type(&type, xfrma);
1595 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1597 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1598 struct xfrm_policy tmp;
1600 err = verify_sec_ctx_len(xfrma);
1604 memset(&tmp, 0, sizeof(struct xfrm_policy));
1606 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1608 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1611 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1613 security_xfrm_policy_free(&tmp);
1618 read_lock(&xp->lock);
1620 read_unlock(&xp->lock);
1624 read_unlock(&xp->lock);
1627 xfrm_policy_delete(xp, p->dir);
1628 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1629 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1632 // reset the timers here?
1633 printk("Dont know what to do with soft policy expire\n");
1635 km_policy_expired(xp, p->dir, up->hard, current->pid);
1642 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1643 struct rtattr **xfrma)
1645 struct xfrm_state *x;
1647 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1648 struct xfrm_usersa_info *p = &ue->state;
1650 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1656 spin_lock_bh(&x->lock);
1658 if (x->km.state != XFRM_STATE_VALID)
1660 km_state_expired(x, ue->hard, current->pid);
1663 __xfrm_state_delete(x);
1664 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1665 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1669 spin_unlock_bh(&x->lock);
1674 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1675 struct rtattr **xfrma)
1677 struct xfrm_policy *xp;
1678 struct xfrm_user_tmpl *ut;
1680 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1682 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1683 struct xfrm_state *x = xfrm_state_alloc();
1689 err = verify_newpolicy_info(&ua->policy);
1691 printk("BAD policy passed\n");
1697 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1703 memcpy(&x->id, &ua->id, sizeof(ua->id));
1704 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1705 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1708 /* extract the templates and for each call km_key */
1709 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1710 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1711 memcpy(&x->id, &t->id, sizeof(x->id));
1712 x->props.mode = t->mode;
1713 x->props.reqid = t->reqid;
1714 x->props.family = ut->family;
1715 t->aalgos = ua->aalgos;
1716 t->ealgos = ua->ealgos;
1717 t->calgos = ua->calgos;
1718 err = km_query(x, t, xp);
1728 #ifdef CONFIG_XFRM_MIGRATE
1729 static int verify_user_migrate(struct rtattr **xfrma)
1731 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1732 struct xfrm_user_migrate *um;
1737 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1743 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1744 struct rtattr **xfrma, int *num)
1746 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1747 struct xfrm_user_migrate *um;
1751 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1753 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1756 for (i = 0; i < num_migrate; i++, um++, ma++) {
1757 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1758 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1759 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1760 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1762 ma->proto = um->proto;
1763 ma->mode = um->mode;
1764 ma->reqid = um->reqid;
1766 ma->old_family = um->old_family;
1767 ma->new_family = um->new_family;
1774 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1775 struct rtattr **xfrma)
1777 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1778 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1783 err = verify_user_migrate((struct rtattr **)xfrma);
1787 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1791 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1792 (struct rtattr **)xfrma, &n);
1799 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1804 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1805 struct rtattr **xfrma)
1807 return -ENOPROTOOPT;
1811 #ifdef CONFIG_XFRM_MIGRATE
1812 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1814 struct xfrm_user_migrate um;
1816 memset(&um, 0, sizeof(um));
1817 um.proto = m->proto;
1819 um.reqid = m->reqid;
1820 um.old_family = m->old_family;
1821 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1822 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1823 um.new_family = m->new_family;
1824 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1825 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1827 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1830 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1832 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1833 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1834 + userpolicy_type_attrsize();
1837 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1838 int num_migrate, struct xfrm_selector *sel,
1841 struct xfrm_migrate *mp;
1842 struct xfrm_userpolicy_id *pol_id;
1843 struct nlmsghdr *nlh;
1846 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1850 pol_id = nlmsg_data(nlh);
1851 /* copy data from selector, dir, and type to the pol_id */
1852 memset(pol_id, 0, sizeof(*pol_id));
1853 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1856 if (copy_to_user_policy_type(type, skb) < 0)
1859 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1860 if (copy_to_user_migrate(mp, skb) < 0)
1864 return nlmsg_end(skb, nlh);
1866 nlmsg_cancel(skb, nlh);
1870 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1871 struct xfrm_migrate *m, int num_migrate)
1873 struct sk_buff *skb;
1875 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1880 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1883 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1886 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1887 struct xfrm_migrate *m, int num_migrate)
1889 return -ENOPROTOOPT;
1893 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1895 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1896 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1897 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1898 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1899 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1900 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1901 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1902 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1903 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1904 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1905 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1906 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1907 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1908 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1909 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1910 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1911 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1912 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1913 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1914 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1915 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1920 static struct xfrm_link {
1921 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1922 int (*dump)(struct sk_buff *, struct netlink_callback *);
1923 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1924 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1925 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1926 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1927 .dump = xfrm_dump_sa },
1928 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1929 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1930 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1931 .dump = xfrm_dump_policy },
1932 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1933 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1934 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1935 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1936 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1937 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1938 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1939 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1940 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1941 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1942 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1943 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1944 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1947 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1949 struct rtattr *xfrma[XFRMA_MAX];
1950 struct xfrm_link *link;
1953 type = nlh->nlmsg_type;
1954 if (type > XFRM_MSG_MAX)
1957 type -= XFRM_MSG_BASE;
1958 link = &xfrm_dispatch[type];
1960 /* All operations require privileges, even GET */
1961 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1964 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1965 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1966 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1967 if (link->dump == NULL)
1970 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1973 memset(xfrma, 0, sizeof(xfrma));
1975 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1978 if (nlh->nlmsg_len > min_len) {
1979 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1980 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1982 while (RTA_OK(attr, attrlen)) {
1983 unsigned short flavor = attr->rta_type;
1985 if (flavor > XFRMA_MAX)
1987 xfrma[flavor - 1] = attr;
1989 attr = RTA_NEXT(attr, attrlen);
1993 if (link->doit == NULL)
1996 return link->doit(skb, nlh, xfrma);
1999 static void xfrm_netlink_rcv(struct sock *sk, int len)
2001 unsigned int qlen = 0;
2004 mutex_lock(&xfrm_cfg_mutex);
2005 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2006 mutex_unlock(&xfrm_cfg_mutex);
2011 static inline size_t xfrm_expire_msgsize(void)
2013 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2016 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2018 struct xfrm_user_expire *ue;
2019 struct nlmsghdr *nlh;
2021 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2025 ue = nlmsg_data(nlh);
2026 copy_to_user_state(x, &ue->state);
2027 ue->hard = (c->data.hard != 0) ? 1 : 0;
2029 return nlmsg_end(skb, nlh);
2032 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2034 struct sk_buff *skb;
2036 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2040 if (build_expire(skb, x, c) < 0)
2043 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2046 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2048 struct sk_buff *skb;
2050 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2054 if (build_aevent(skb, x, c) < 0)
2057 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2060 static int xfrm_notify_sa_flush(struct km_event *c)
2062 struct xfrm_usersa_flush *p;
2063 struct nlmsghdr *nlh;
2064 struct sk_buff *skb;
2065 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2067 skb = nlmsg_new(len, GFP_ATOMIC);
2071 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2077 p = nlmsg_data(nlh);
2078 p->proto = c->data.proto;
2080 nlmsg_end(skb, nlh);
2082 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2085 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2089 l += nla_total_size(alg_len(x->aalg));
2091 l += nla_total_size(alg_len(x->ealg));
2093 l += nla_total_size(sizeof(*x->calg));
2095 l += nla_total_size(sizeof(*x->encap));
2100 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2102 struct xfrm_usersa_info *p;
2103 struct xfrm_usersa_id *id;
2104 struct nlmsghdr *nlh;
2105 struct sk_buff *skb;
2106 int len = xfrm_sa_len(x);
2109 headlen = sizeof(*p);
2110 if (c->event == XFRM_MSG_DELSA) {
2111 len += nla_total_size(headlen);
2112 headlen = sizeof(*id);
2114 len += NLMSG_ALIGN(headlen);
2116 skb = nlmsg_new(len, GFP_ATOMIC);
2120 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2122 goto nla_put_failure;
2124 p = nlmsg_data(nlh);
2125 if (c->event == XFRM_MSG_DELSA) {
2126 struct nlattr *attr;
2128 id = nlmsg_data(nlh);
2129 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2130 id->spi = x->id.spi;
2131 id->family = x->props.family;
2132 id->proto = x->id.proto;
2134 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2136 goto nla_put_failure;
2141 copy_to_user_state(x, p);
2144 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
2146 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
2148 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2151 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2153 nlmsg_end(skb, nlh);
2155 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2162 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2166 case XFRM_MSG_EXPIRE:
2167 return xfrm_exp_state_notify(x, c);
2168 case XFRM_MSG_NEWAE:
2169 return xfrm_aevent_state_notify(x, c);
2170 case XFRM_MSG_DELSA:
2171 case XFRM_MSG_UPDSA:
2172 case XFRM_MSG_NEWSA:
2173 return xfrm_notify_sa(x, c);
2174 case XFRM_MSG_FLUSHSA:
2175 return xfrm_notify_sa_flush(c);
2177 printk("xfrm_user: Unknown SA event %d\n", c->event);
2185 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2186 struct xfrm_policy *xp)
2188 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2189 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2190 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2191 + userpolicy_type_attrsize();
2194 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2195 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2198 struct xfrm_user_acquire *ua;
2199 struct nlmsghdr *nlh;
2200 __u32 seq = xfrm_get_acqseq();
2202 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2206 ua = nlmsg_data(nlh);
2207 memcpy(&ua->id, &x->id, sizeof(ua->id));
2208 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2209 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2210 copy_to_user_policy(xp, &ua->policy, dir);
2211 ua->aalgos = xt->aalgos;
2212 ua->ealgos = xt->ealgos;
2213 ua->calgos = xt->calgos;
2214 ua->seq = x->km.seq = seq;
2216 if (copy_to_user_tmpl(xp, skb) < 0)
2218 if (copy_to_user_state_sec_ctx(x, skb))
2220 if (copy_to_user_policy_type(xp->type, skb) < 0)
2223 return nlmsg_end(skb, nlh);
2226 nlmsg_cancel(skb, nlh);
2230 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2231 struct xfrm_policy *xp, int dir)
2233 struct sk_buff *skb;
2235 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2239 if (build_acquire(skb, x, xt, xp, dir) < 0)
2242 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2245 /* User gives us xfrm_user_policy_info followed by an array of 0
2246 * or more templates.
2248 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2249 u8 *data, int len, int *dir)
2251 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2252 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2253 struct xfrm_policy *xp;
2256 switch (sk->sk_family) {
2258 if (opt != IP_XFRM_POLICY) {
2263 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2265 if (opt != IPV6_XFRM_POLICY) {
2278 if (len < sizeof(*p) ||
2279 verify_newpolicy_info(p))
2282 nr = ((len - sizeof(*p)) / sizeof(*ut));
2283 if (validate_tmpl(nr, ut, p->sel.family))
2286 if (p->dir > XFRM_POLICY_OUT)
2289 xp = xfrm_policy_alloc(GFP_KERNEL);
2295 copy_from_user_policy(xp, p);
2296 xp->type = XFRM_POLICY_TYPE_MAIN;
2297 copy_templates(xp, ut, nr);
2304 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2306 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2307 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2308 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2309 + userpolicy_type_attrsize();
2312 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2313 int dir, struct km_event *c)
2315 struct xfrm_user_polexpire *upe;
2316 struct nlmsghdr *nlh;
2317 int hard = c->data.hard;
2319 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2323 upe = nlmsg_data(nlh);
2324 copy_to_user_policy(xp, &upe->pol, dir);
2325 if (copy_to_user_tmpl(xp, skb) < 0)
2327 if (copy_to_user_sec_ctx(xp, skb))
2329 if (copy_to_user_policy_type(xp->type, skb) < 0)
2333 return nlmsg_end(skb, nlh);
2336 nlmsg_cancel(skb, nlh);
2340 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2342 struct sk_buff *skb;
2344 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2348 if (build_polexpire(skb, xp, dir, c) < 0)
2351 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2354 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2356 struct xfrm_userpolicy_info *p;
2357 struct xfrm_userpolicy_id *id;
2358 struct nlmsghdr *nlh;
2359 struct sk_buff *skb;
2360 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2363 headlen = sizeof(*p);
2364 if (c->event == XFRM_MSG_DELPOLICY) {
2365 len += nla_total_size(headlen);
2366 headlen = sizeof(*id);
2368 len += userpolicy_type_attrsize();
2369 len += NLMSG_ALIGN(headlen);
2371 skb = nlmsg_new(len, GFP_ATOMIC);
2375 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2379 p = nlmsg_data(nlh);
2380 if (c->event == XFRM_MSG_DELPOLICY) {
2381 struct nlattr *attr;
2383 id = nlmsg_data(nlh);
2384 memset(id, 0, sizeof(*id));
2387 id->index = xp->index;
2389 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2391 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2398 copy_to_user_policy(xp, p, dir);
2399 if (copy_to_user_tmpl(xp, skb) < 0)
2401 if (copy_to_user_policy_type(xp->type, skb) < 0)
2404 nlmsg_end(skb, nlh);
2406 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2413 static int xfrm_notify_policy_flush(struct km_event *c)
2415 struct nlmsghdr *nlh;
2416 struct sk_buff *skb;
2418 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2422 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2425 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2428 nlmsg_end(skb, nlh);
2430 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2437 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2441 case XFRM_MSG_NEWPOLICY:
2442 case XFRM_MSG_UPDPOLICY:
2443 case XFRM_MSG_DELPOLICY:
2444 return xfrm_notify_policy(xp, dir, c);
2445 case XFRM_MSG_FLUSHPOLICY:
2446 return xfrm_notify_policy_flush(c);
2447 case XFRM_MSG_POLEXPIRE:
2448 return xfrm_exp_policy_notify(xp, dir, c);
2450 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2457 static inline size_t xfrm_report_msgsize(void)
2459 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2462 static int build_report(struct sk_buff *skb, u8 proto,
2463 struct xfrm_selector *sel, xfrm_address_t *addr)
2465 struct xfrm_user_report *ur;
2466 struct nlmsghdr *nlh;
2468 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2472 ur = nlmsg_data(nlh);
2474 memcpy(&ur->sel, sel, sizeof(ur->sel));
2477 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2479 return nlmsg_end(skb, nlh);
2482 nlmsg_cancel(skb, nlh);
2486 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2487 xfrm_address_t *addr)
2489 struct sk_buff *skb;
2491 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2495 if (build_report(skb, proto, sel, addr) < 0)
2498 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2501 static struct xfrm_mgr netlink_mgr = {
2503 .notify = xfrm_send_state_notify,
2504 .acquire = xfrm_send_acquire,
2505 .compile_policy = xfrm_compile_policy,
2506 .notify_policy = xfrm_send_policy_notify,
2507 .report = xfrm_send_report,
2508 .migrate = xfrm_send_migrate,
2511 static int __init xfrm_user_init(void)
2515 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2517 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2518 xfrm_netlink_rcv, NULL, THIS_MODULE);
2521 rcu_assign_pointer(xfrm_nl, nlsk);
2523 xfrm_register_km(&netlink_mgr);
2528 static void __exit xfrm_user_exit(void)
2530 struct sock *nlsk = xfrm_nl;
2532 xfrm_unregister_km(&netlink_mgr);
2533 rcu_assign_pointer(xfrm_nl, NULL);
2535 sock_release(nlsk->sk_socket);
2538 module_init(xfrm_user_init);
2539 module_exit(xfrm_user_exit);
2540 MODULE_LICENSE("GPL");
2541 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);