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 = alloc_skb(NLMSG_GOODSIZE, 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 int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
693 struct xfrmk_spdinfo si;
694 struct xfrmu_spdinfo spc;
695 struct xfrmu_spdhinfo sph;
696 struct nlmsghdr *nlh;
699 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
700 if (nlh == NULL) /* shouldnt really happen ... */
705 xfrm_spd_getinfo(&si);
706 spc.incnt = si.incnt;
707 spc.outcnt = si.outcnt;
708 spc.fwdcnt = si.fwdcnt;
709 spc.inscnt = si.inscnt;
710 spc.outscnt = si.outscnt;
711 spc.fwdscnt = si.fwdscnt;
712 sph.spdhcnt = si.spdhcnt;
713 sph.spdhmcnt = si.spdhmcnt;
715 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
716 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
718 return nlmsg_end(skb, nlh);
721 nlmsg_cancel(skb, nlh);
725 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
726 struct rtattr **xfrma)
728 struct sk_buff *r_skb;
729 u32 *flags = nlmsg_data(nlh);
730 u32 spid = NETLINK_CB(skb).pid;
731 u32 seq = nlh->nlmsg_seq;
732 int len = NLMSG_LENGTH(sizeof(u32));
734 len += RTA_SPACE(sizeof(struct xfrmu_spdinfo));
735 len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo));
737 r_skb = alloc_skb(len, GFP_ATOMIC);
741 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
744 return nlmsg_unicast(xfrm_nl, r_skb, spid);
747 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
749 struct xfrmk_sadinfo si;
750 struct xfrmu_sadhinfo sh;
751 struct nlmsghdr *nlh;
754 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
755 if (nlh == NULL) /* shouldnt really happen ... */
760 xfrm_sad_getinfo(&si);
762 sh.sadhmcnt = si.sadhmcnt;
763 sh.sadhcnt = si.sadhcnt;
765 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
766 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
768 return nlmsg_end(skb, nlh);
771 nlmsg_cancel(skb, nlh);
775 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
776 struct rtattr **xfrma)
778 struct sk_buff *r_skb;
779 u32 *flags = nlmsg_data(nlh);
780 u32 spid = NETLINK_CB(skb).pid;
781 u32 seq = nlh->nlmsg_seq;
782 int len = NLMSG_LENGTH(sizeof(u32));
784 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
785 len += RTA_SPACE(sizeof(u32));
787 r_skb = alloc_skb(len, GFP_ATOMIC);
792 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
795 return nlmsg_unicast(xfrm_nl, r_skb, spid);
798 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
799 struct rtattr **xfrma)
801 struct xfrm_usersa_id *p = nlmsg_data(nlh);
802 struct xfrm_state *x;
803 struct sk_buff *resp_skb;
806 x = xfrm_user_state_lookup(p, xfrma, &err);
810 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
811 if (IS_ERR(resp_skb)) {
812 err = PTR_ERR(resp_skb);
814 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
821 static int verify_userspi_info(struct xfrm_userspi_info *p)
823 switch (p->info.id.proto) {
829 /* IPCOMP spi is 16-bits. */
830 if (p->max >= 0x10000)
844 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
845 struct rtattr **xfrma)
847 struct xfrm_state *x;
848 struct xfrm_userspi_info *p;
849 struct sk_buff *resp_skb;
850 xfrm_address_t *daddr;
855 err = verify_userspi_info(p);
859 family = p->info.family;
860 daddr = &p->info.id.daddr;
864 x = xfrm_find_acq_byseq(p->info.seq);
865 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
872 x = xfrm_find_acq(p->info.mode, p->info.reqid,
873 p->info.id.proto, daddr,
880 resp_skb = ERR_PTR(-ENOENT);
882 spin_lock_bh(&x->lock);
883 if (x->km.state != XFRM_STATE_DEAD) {
884 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
886 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
888 spin_unlock_bh(&x->lock);
890 if (IS_ERR(resp_skb)) {
891 err = PTR_ERR(resp_skb);
895 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
903 static int verify_policy_dir(u8 dir)
907 case XFRM_POLICY_OUT:
908 case XFRM_POLICY_FWD:
918 static int verify_policy_type(u8 type)
921 case XFRM_POLICY_TYPE_MAIN:
922 #ifdef CONFIG_XFRM_SUB_POLICY
923 case XFRM_POLICY_TYPE_SUB:
934 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
938 case XFRM_SHARE_SESSION:
939 case XFRM_SHARE_USER:
940 case XFRM_SHARE_UNIQUE:
948 case XFRM_POLICY_ALLOW:
949 case XFRM_POLICY_BLOCK:
956 switch (p->sel.family) {
961 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
964 return -EAFNOSUPPORT;
971 return verify_policy_dir(p->dir);
974 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
976 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
977 struct xfrm_user_sec_ctx *uctx;
983 return security_xfrm_policy_alloc(pol, uctx);
986 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
992 for (i = 0; i < nr; i++, ut++) {
993 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
995 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
996 memcpy(&t->saddr, &ut->saddr,
997 sizeof(xfrm_address_t));
998 t->reqid = ut->reqid;
1000 t->share = ut->share;
1001 t->optional = ut->optional;
1002 t->aalgos = ut->aalgos;
1003 t->ealgos = ut->ealgos;
1004 t->calgos = ut->calgos;
1005 t->encap_family = ut->family;
1009 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1013 if (nr > XFRM_MAX_DEPTH)
1016 for (i = 0; i < nr; i++) {
1017 /* We never validated the ut->family value, so many
1018 * applications simply leave it at zero. The check was
1019 * never made and ut->family was ignored because all
1020 * templates could be assumed to have the same family as
1021 * the policy itself. Now that we will have ipv4-in-ipv6
1022 * and ipv6-in-ipv4 tunnels, this is no longer true.
1025 ut[i].family = family;
1027 switch (ut[i].family) {
1030 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1042 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1044 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1049 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1050 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1053 err = validate_tmpl(nr, utmpl, pol->family);
1057 copy_templates(pol, RTA_DATA(rt), nr);
1062 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1064 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1065 struct xfrm_userpolicy_type *upt;
1066 u8 type = XFRM_POLICY_TYPE_MAIN;
1070 if (rt->rta_len < sizeof(*upt))
1077 err = verify_policy_type(type);
1085 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1087 xp->priority = p->priority;
1088 xp->index = p->index;
1089 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1090 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1091 xp->action = p->action;
1092 xp->flags = p->flags;
1093 xp->family = p->sel.family;
1094 /* XXX xp->share = p->share; */
1097 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1099 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1100 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1101 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1102 p->priority = xp->priority;
1103 p->index = xp->index;
1104 p->sel.family = xp->family;
1106 p->action = xp->action;
1107 p->flags = xp->flags;
1108 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1111 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1113 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1121 copy_from_user_policy(xp, p);
1123 err = copy_from_user_policy_type(&xp->type, xfrma);
1127 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1128 err = copy_from_user_sec_ctx(xp, xfrma);
1139 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1140 struct rtattr **xfrma)
1142 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1143 struct xfrm_policy *xp;
1148 err = verify_newpolicy_info(p);
1151 err = verify_sec_ctx_len(xfrma);
1155 xp = xfrm_policy_construct(p, xfrma, &err);
1159 /* shouldnt excl be based on nlh flags??
1160 * Aha! this is anti-netlink really i.e more pfkey derived
1161 * in netlink excl is a flag and you wouldnt need
1162 * a type XFRM_MSG_UPDPOLICY - JHS */
1163 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1164 err = xfrm_policy_insert(p->dir, xp, excl);
1165 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1166 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1169 security_xfrm_policy_free(xp);
1174 c.event = nlh->nlmsg_type;
1175 c.seq = nlh->nlmsg_seq;
1176 c.pid = nlh->nlmsg_pid;
1177 km_policy_notify(xp, p->dir, &c);
1184 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1186 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1189 if (xp->xfrm_nr == 0)
1192 for (i = 0; i < xp->xfrm_nr; i++) {
1193 struct xfrm_user_tmpl *up = &vec[i];
1194 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1196 memcpy(&up->id, &kp->id, sizeof(up->id));
1197 up->family = kp->encap_family;
1198 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1199 up->reqid = kp->reqid;
1200 up->mode = kp->mode;
1201 up->share = kp->share;
1202 up->optional = kp->optional;
1203 up->aalgos = kp->aalgos;
1204 up->ealgos = kp->ealgos;
1205 up->calgos = kp->calgos;
1208 return nla_put(skb, XFRMA_TMPL,
1209 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1212 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1215 return copy_sec_ctx(x->security, skb);
1220 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1223 return copy_sec_ctx(xp->security, skb);
1227 static inline size_t userpolicy_type_attrsize(void)
1229 #ifdef CONFIG_XFRM_SUB_POLICY
1230 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1236 #ifdef CONFIG_XFRM_SUB_POLICY
1237 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1239 struct xfrm_userpolicy_type upt = {
1243 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1247 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1253 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1255 struct xfrm_dump_info *sp = ptr;
1256 struct xfrm_userpolicy_info *p;
1257 struct sk_buff *in_skb = sp->in_skb;
1258 struct sk_buff *skb = sp->out_skb;
1259 struct nlmsghdr *nlh;
1261 if (sp->this_idx < sp->start_idx)
1264 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1265 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1269 p = nlmsg_data(nlh);
1270 copy_to_user_policy(xp, p, dir);
1271 if (copy_to_user_tmpl(xp, skb) < 0)
1273 if (copy_to_user_sec_ctx(xp, skb))
1275 if (copy_to_user_policy_type(xp->type, skb) < 0)
1278 nlmsg_end(skb, nlh);
1284 nlmsg_cancel(skb, nlh);
1288 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1290 struct xfrm_dump_info info;
1292 info.in_skb = cb->skb;
1294 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1295 info.nlmsg_flags = NLM_F_MULTI;
1297 info.start_idx = cb->args[0];
1298 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1299 #ifdef CONFIG_XFRM_SUB_POLICY
1300 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1302 cb->args[0] = info.this_idx;
1307 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1308 struct xfrm_policy *xp,
1311 struct xfrm_dump_info info;
1312 struct sk_buff *skb;
1314 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1316 return ERR_PTR(-ENOMEM);
1318 info.in_skb = in_skb;
1320 info.nlmsg_seq = seq;
1321 info.nlmsg_flags = 0;
1322 info.this_idx = info.start_idx = 0;
1324 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1332 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1333 struct rtattr **xfrma)
1335 struct xfrm_policy *xp;
1336 struct xfrm_userpolicy_id *p;
1337 u8 type = XFRM_POLICY_TYPE_MAIN;
1342 p = nlmsg_data(nlh);
1343 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1345 err = copy_from_user_policy_type(&type, xfrma);
1349 err = verify_policy_dir(p->dir);
1354 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1356 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1357 struct xfrm_policy tmp;
1359 err = verify_sec_ctx_len(xfrma);
1363 memset(&tmp, 0, sizeof(struct xfrm_policy));
1365 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1367 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1370 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1372 security_xfrm_policy_free(&tmp);
1378 struct sk_buff *resp_skb;
1380 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1381 if (IS_ERR(resp_skb)) {
1382 err = PTR_ERR(resp_skb);
1384 err = nlmsg_unicast(xfrm_nl, resp_skb,
1385 NETLINK_CB(skb).pid);
1388 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1389 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1394 c.data.byid = p->index;
1395 c.event = nlh->nlmsg_type;
1396 c.seq = nlh->nlmsg_seq;
1397 c.pid = nlh->nlmsg_pid;
1398 km_policy_notify(xp, p->dir, &c);
1406 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1407 struct rtattr **xfrma)
1410 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1411 struct xfrm_audit audit_info;
1414 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1415 audit_info.secid = NETLINK_CB(skb).sid;
1416 err = xfrm_state_flush(p->proto, &audit_info);
1419 c.data.proto = p->proto;
1420 c.event = nlh->nlmsg_type;
1421 c.seq = nlh->nlmsg_seq;
1422 c.pid = nlh->nlmsg_pid;
1423 km_state_notify(NULL, &c);
1429 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1431 struct xfrm_aevent_id *id;
1432 struct nlmsghdr *nlh;
1434 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1438 id = nlmsg_data(nlh);
1439 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1440 id->sa_id.spi = x->id.spi;
1441 id->sa_id.family = x->props.family;
1442 id->sa_id.proto = x->id.proto;
1443 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1444 id->reqid = x->props.reqid;
1445 id->flags = c->data.aevent;
1447 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1448 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1450 if (id->flags & XFRM_AE_RTHR)
1451 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1453 if (id->flags & XFRM_AE_ETHR)
1454 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1455 x->replay_maxage * 10 / HZ);
1457 return nlmsg_end(skb, nlh);
1460 nlmsg_cancel(skb, nlh);
1464 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1465 struct rtattr **xfrma)
1467 struct xfrm_state *x;
1468 struct sk_buff *r_skb;
1471 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1472 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1473 struct xfrm_usersa_id *id = &p->sa_id;
1475 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1476 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1478 if (p->flags&XFRM_AE_RTHR)
1479 len+=RTA_SPACE(sizeof(u32));
1481 if (p->flags&XFRM_AE_ETHR)
1482 len+=RTA_SPACE(sizeof(u32));
1484 r_skb = alloc_skb(len, GFP_ATOMIC);
1488 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1495 * XXX: is this lock really needed - none of the other
1496 * gets lock (the concern is things getting updated
1497 * while we are still reading) - jhs
1499 spin_lock_bh(&x->lock);
1500 c.data.aevent = p->flags;
1501 c.seq = nlh->nlmsg_seq;
1502 c.pid = nlh->nlmsg_pid;
1504 if (build_aevent(r_skb, x, &c) < 0)
1506 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1507 spin_unlock_bh(&x->lock);
1512 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1513 struct rtattr **xfrma)
1515 struct xfrm_state *x;
1518 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1519 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1520 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1525 /* pedantic mode - thou shalt sayeth replaceth */
1526 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1529 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1533 if (x->km.state != XFRM_STATE_VALID)
1536 spin_lock_bh(&x->lock);
1537 err = xfrm_update_ae_params(x, xfrma);
1538 spin_unlock_bh(&x->lock);
1542 c.event = nlh->nlmsg_type;
1543 c.seq = nlh->nlmsg_seq;
1544 c.pid = nlh->nlmsg_pid;
1545 c.data.aevent = XFRM_AE_CU;
1546 km_state_notify(x, &c);
1553 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1554 struct rtattr **xfrma)
1557 u8 type = XFRM_POLICY_TYPE_MAIN;
1559 struct xfrm_audit audit_info;
1561 err = copy_from_user_policy_type(&type, xfrma);
1565 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1566 audit_info.secid = NETLINK_CB(skb).sid;
1567 err = xfrm_policy_flush(type, &audit_info);
1571 c.event = nlh->nlmsg_type;
1572 c.seq = nlh->nlmsg_seq;
1573 c.pid = nlh->nlmsg_pid;
1574 km_policy_notify(NULL, 0, &c);
1578 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1579 struct rtattr **xfrma)
1581 struct xfrm_policy *xp;
1582 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1583 struct xfrm_userpolicy_info *p = &up->pol;
1584 u8 type = XFRM_POLICY_TYPE_MAIN;
1587 err = copy_from_user_policy_type(&type, xfrma);
1592 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1594 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1595 struct xfrm_policy tmp;
1597 err = verify_sec_ctx_len(xfrma);
1601 memset(&tmp, 0, sizeof(struct xfrm_policy));
1603 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1605 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1608 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1610 security_xfrm_policy_free(&tmp);
1615 read_lock(&xp->lock);
1617 read_unlock(&xp->lock);
1621 read_unlock(&xp->lock);
1624 xfrm_policy_delete(xp, p->dir);
1625 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1626 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1629 // reset the timers here?
1630 printk("Dont know what to do with soft policy expire\n");
1632 km_policy_expired(xp, p->dir, up->hard, current->pid);
1639 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1640 struct rtattr **xfrma)
1642 struct xfrm_state *x;
1644 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1645 struct xfrm_usersa_info *p = &ue->state;
1647 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1653 spin_lock_bh(&x->lock);
1655 if (x->km.state != XFRM_STATE_VALID)
1657 km_state_expired(x, ue->hard, current->pid);
1660 __xfrm_state_delete(x);
1661 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1662 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1666 spin_unlock_bh(&x->lock);
1671 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1672 struct rtattr **xfrma)
1674 struct xfrm_policy *xp;
1675 struct xfrm_user_tmpl *ut;
1677 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1679 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1680 struct xfrm_state *x = xfrm_state_alloc();
1686 err = verify_newpolicy_info(&ua->policy);
1688 printk("BAD policy passed\n");
1694 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1700 memcpy(&x->id, &ua->id, sizeof(ua->id));
1701 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1702 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1705 /* extract the templates and for each call km_key */
1706 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1707 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1708 memcpy(&x->id, &t->id, sizeof(x->id));
1709 x->props.mode = t->mode;
1710 x->props.reqid = t->reqid;
1711 x->props.family = ut->family;
1712 t->aalgos = ua->aalgos;
1713 t->ealgos = ua->ealgos;
1714 t->calgos = ua->calgos;
1715 err = km_query(x, t, xp);
1725 #ifdef CONFIG_XFRM_MIGRATE
1726 static int verify_user_migrate(struct rtattr **xfrma)
1728 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1729 struct xfrm_user_migrate *um;
1734 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1740 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1741 struct rtattr **xfrma, int *num)
1743 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1744 struct xfrm_user_migrate *um;
1748 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1750 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1753 for (i = 0; i < num_migrate; i++, um++, ma++) {
1754 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1755 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1756 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1757 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1759 ma->proto = um->proto;
1760 ma->mode = um->mode;
1761 ma->reqid = um->reqid;
1763 ma->old_family = um->old_family;
1764 ma->new_family = um->new_family;
1771 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1772 struct rtattr **xfrma)
1774 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1775 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1780 err = verify_user_migrate((struct rtattr **)xfrma);
1784 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1788 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1789 (struct rtattr **)xfrma, &n);
1796 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1801 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1802 struct rtattr **xfrma)
1804 return -ENOPROTOOPT;
1808 #ifdef CONFIG_XFRM_MIGRATE
1809 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1811 struct xfrm_user_migrate um;
1813 memset(&um, 0, sizeof(um));
1814 um.proto = m->proto;
1816 um.reqid = m->reqid;
1817 um.old_family = m->old_family;
1818 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1819 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1820 um.new_family = m->new_family;
1821 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1822 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1824 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1827 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1828 int num_migrate, struct xfrm_selector *sel,
1831 struct xfrm_migrate *mp;
1832 struct xfrm_userpolicy_id *pol_id;
1833 struct nlmsghdr *nlh;
1836 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1840 pol_id = nlmsg_data(nlh);
1841 /* copy data from selector, dir, and type to the pol_id */
1842 memset(pol_id, 0, sizeof(*pol_id));
1843 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1846 if (copy_to_user_policy_type(type, skb) < 0)
1849 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1850 if (copy_to_user_migrate(mp, skb) < 0)
1854 return nlmsg_end(skb, nlh);
1856 nlmsg_cancel(skb, nlh);
1860 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1861 struct xfrm_migrate *m, int num_migrate)
1863 struct sk_buff *skb;
1866 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1867 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1868 len += userpolicy_type_attrsize();
1869 skb = alloc_skb(len, GFP_ATOMIC);
1874 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1877 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1880 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1881 struct xfrm_migrate *m, int num_migrate)
1883 return -ENOPROTOOPT;
1887 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1889 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1890 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1891 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1892 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1893 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1894 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1895 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1896 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1897 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1898 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1899 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1900 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1901 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1902 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1903 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1904 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1905 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1906 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1907 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1908 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1909 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1914 static struct xfrm_link {
1915 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1916 int (*dump)(struct sk_buff *, struct netlink_callback *);
1917 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1918 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1919 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1920 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1921 .dump = xfrm_dump_sa },
1922 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1923 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1924 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1925 .dump = xfrm_dump_policy },
1926 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1927 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1928 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1929 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1930 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1931 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1932 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1933 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1934 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1935 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1936 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1937 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1938 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1941 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1943 struct rtattr *xfrma[XFRMA_MAX];
1944 struct xfrm_link *link;
1947 type = nlh->nlmsg_type;
1948 if (type > XFRM_MSG_MAX)
1951 type -= XFRM_MSG_BASE;
1952 link = &xfrm_dispatch[type];
1954 /* All operations require privileges, even GET */
1955 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1958 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1959 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1960 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1961 if (link->dump == NULL)
1964 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1967 memset(xfrma, 0, sizeof(xfrma));
1969 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1972 if (nlh->nlmsg_len > min_len) {
1973 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1974 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1976 while (RTA_OK(attr, attrlen)) {
1977 unsigned short flavor = attr->rta_type;
1979 if (flavor > XFRMA_MAX)
1981 xfrma[flavor - 1] = attr;
1983 attr = RTA_NEXT(attr, attrlen);
1987 if (link->doit == NULL)
1990 return link->doit(skb, nlh, xfrma);
1993 static void xfrm_netlink_rcv(struct sock *sk, int len)
1995 unsigned int qlen = 0;
1998 mutex_lock(&xfrm_cfg_mutex);
1999 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2000 mutex_unlock(&xfrm_cfg_mutex);
2005 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2007 struct xfrm_user_expire *ue;
2008 struct nlmsghdr *nlh;
2010 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2014 ue = nlmsg_data(nlh);
2015 copy_to_user_state(x, &ue->state);
2016 ue->hard = (c->data.hard != 0) ? 1 : 0;
2018 return nlmsg_end(skb, nlh);
2021 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2023 struct sk_buff *skb;
2024 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2026 skb = alloc_skb(len, GFP_ATOMIC);
2030 if (build_expire(skb, x, c) < 0)
2033 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2036 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2038 struct sk_buff *skb;
2039 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2041 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2042 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2043 skb = alloc_skb(len, GFP_ATOMIC);
2047 if (build_aevent(skb, x, c) < 0)
2050 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2053 static int xfrm_notify_sa_flush(struct km_event *c)
2055 struct xfrm_usersa_flush *p;
2056 struct nlmsghdr *nlh;
2057 struct sk_buff *skb;
2058 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2060 skb = alloc_skb(len, GFP_ATOMIC);
2064 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2070 p = nlmsg_data(nlh);
2071 p->proto = c->data.proto;
2073 nlmsg_end(skb, nlh);
2075 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2078 static inline int xfrm_sa_len(struct xfrm_state *x)
2082 l += RTA_SPACE(alg_len(x->aalg));
2084 l += RTA_SPACE(alg_len(x->ealg));
2086 l += RTA_SPACE(sizeof(*x->calg));
2088 l += RTA_SPACE(sizeof(*x->encap));
2093 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2095 struct xfrm_usersa_info *p;
2096 struct xfrm_usersa_id *id;
2097 struct nlmsghdr *nlh;
2098 struct sk_buff *skb;
2099 int len = xfrm_sa_len(x);
2102 headlen = sizeof(*p);
2103 if (c->event == XFRM_MSG_DELSA) {
2104 len += RTA_SPACE(headlen);
2105 headlen = sizeof(*id);
2107 len += NLMSG_SPACE(headlen);
2109 skb = alloc_skb(len, GFP_ATOMIC);
2113 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2115 goto nla_put_failure;
2117 p = nlmsg_data(nlh);
2118 if (c->event == XFRM_MSG_DELSA) {
2119 struct nlattr *attr;
2121 id = nlmsg_data(nlh);
2122 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2123 id->spi = x->id.spi;
2124 id->family = x->props.family;
2125 id->proto = x->id.proto;
2127 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2129 goto nla_put_failure;
2134 copy_to_user_state(x, p);
2137 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
2139 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
2141 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2144 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2146 nlmsg_end(skb, nlh);
2148 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2155 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2159 case XFRM_MSG_EXPIRE:
2160 return xfrm_exp_state_notify(x, c);
2161 case XFRM_MSG_NEWAE:
2162 return xfrm_aevent_state_notify(x, c);
2163 case XFRM_MSG_DELSA:
2164 case XFRM_MSG_UPDSA:
2165 case XFRM_MSG_NEWSA:
2166 return xfrm_notify_sa(x, c);
2167 case XFRM_MSG_FLUSHSA:
2168 return xfrm_notify_sa_flush(c);
2170 printk("xfrm_user: Unknown SA event %d\n", c->event);
2178 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2179 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2182 struct xfrm_user_acquire *ua;
2183 struct nlmsghdr *nlh;
2184 __u32 seq = xfrm_get_acqseq();
2186 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2190 ua = nlmsg_data(nlh);
2191 memcpy(&ua->id, &x->id, sizeof(ua->id));
2192 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2193 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2194 copy_to_user_policy(xp, &ua->policy, dir);
2195 ua->aalgos = xt->aalgos;
2196 ua->ealgos = xt->ealgos;
2197 ua->calgos = xt->calgos;
2198 ua->seq = x->km.seq = seq;
2200 if (copy_to_user_tmpl(xp, skb) < 0)
2202 if (copy_to_user_state_sec_ctx(x, skb))
2204 if (copy_to_user_policy_type(xp->type, skb) < 0)
2207 return nlmsg_end(skb, nlh);
2210 nlmsg_cancel(skb, nlh);
2214 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2215 struct xfrm_policy *xp, int dir)
2217 struct sk_buff *skb;
2220 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2221 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2222 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2223 len += userpolicy_type_attrsize();
2224 skb = alloc_skb(len, GFP_ATOMIC);
2228 if (build_acquire(skb, x, xt, xp, dir) < 0)
2231 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2234 /* User gives us xfrm_user_policy_info followed by an array of 0
2235 * or more templates.
2237 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2238 u8 *data, int len, int *dir)
2240 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2241 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2242 struct xfrm_policy *xp;
2245 switch (sk->sk_family) {
2247 if (opt != IP_XFRM_POLICY) {
2252 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2254 if (opt != IPV6_XFRM_POLICY) {
2267 if (len < sizeof(*p) ||
2268 verify_newpolicy_info(p))
2271 nr = ((len - sizeof(*p)) / sizeof(*ut));
2272 if (validate_tmpl(nr, ut, p->sel.family))
2275 if (p->dir > XFRM_POLICY_OUT)
2278 xp = xfrm_policy_alloc(GFP_KERNEL);
2284 copy_from_user_policy(xp, p);
2285 xp->type = XFRM_POLICY_TYPE_MAIN;
2286 copy_templates(xp, ut, nr);
2293 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2294 int dir, struct km_event *c)
2296 struct xfrm_user_polexpire *upe;
2297 struct nlmsghdr *nlh;
2298 int hard = c->data.hard;
2300 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2304 upe = nlmsg_data(nlh);
2305 copy_to_user_policy(xp, &upe->pol, dir);
2306 if (copy_to_user_tmpl(xp, skb) < 0)
2308 if (copy_to_user_sec_ctx(xp, skb))
2310 if (copy_to_user_policy_type(xp->type, skb) < 0)
2314 return nlmsg_end(skb, nlh);
2317 nlmsg_cancel(skb, nlh);
2321 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2323 struct sk_buff *skb;
2326 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2327 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2328 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2329 len += userpolicy_type_attrsize();
2330 skb = alloc_skb(len, GFP_ATOMIC);
2334 if (build_polexpire(skb, xp, dir, c) < 0)
2337 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2340 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2342 struct xfrm_userpolicy_info *p;
2343 struct xfrm_userpolicy_id *id;
2344 struct nlmsghdr *nlh;
2345 struct sk_buff *skb;
2346 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2349 headlen = sizeof(*p);
2350 if (c->event == XFRM_MSG_DELPOLICY) {
2351 len += RTA_SPACE(headlen);
2352 headlen = sizeof(*id);
2354 len += userpolicy_type_attrsize();
2355 len += NLMSG_SPACE(headlen);
2357 skb = alloc_skb(len, GFP_ATOMIC);
2361 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2365 p = nlmsg_data(nlh);
2366 if (c->event == XFRM_MSG_DELPOLICY) {
2367 struct nlattr *attr;
2369 id = nlmsg_data(nlh);
2370 memset(id, 0, sizeof(*id));
2373 id->index = xp->index;
2375 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2377 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2384 copy_to_user_policy(xp, p, dir);
2385 if (copy_to_user_tmpl(xp, skb) < 0)
2387 if (copy_to_user_policy_type(xp->type, skb) < 0)
2390 nlmsg_end(skb, nlh);
2392 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2399 static int xfrm_notify_policy_flush(struct km_event *c)
2401 struct nlmsghdr *nlh;
2402 struct sk_buff *skb;
2404 len += userpolicy_type_attrsize();
2405 len += NLMSG_LENGTH(0);
2407 skb = alloc_skb(len, GFP_ATOMIC);
2411 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2414 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2417 nlmsg_end(skb, nlh);
2419 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2426 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2430 case XFRM_MSG_NEWPOLICY:
2431 case XFRM_MSG_UPDPOLICY:
2432 case XFRM_MSG_DELPOLICY:
2433 return xfrm_notify_policy(xp, dir, c);
2434 case XFRM_MSG_FLUSHPOLICY:
2435 return xfrm_notify_policy_flush(c);
2436 case XFRM_MSG_POLEXPIRE:
2437 return xfrm_exp_policy_notify(xp, dir, c);
2439 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2446 static int build_report(struct sk_buff *skb, u8 proto,
2447 struct xfrm_selector *sel, xfrm_address_t *addr)
2449 struct xfrm_user_report *ur;
2450 struct nlmsghdr *nlh;
2452 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2456 ur = nlmsg_data(nlh);
2458 memcpy(&ur->sel, sel, sizeof(ur->sel));
2461 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2463 return nlmsg_end(skb, nlh);
2466 nlmsg_cancel(skb, nlh);
2470 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2471 xfrm_address_t *addr)
2473 struct sk_buff *skb;
2476 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2477 skb = alloc_skb(len, GFP_ATOMIC);
2481 if (build_report(skb, proto, sel, addr) < 0)
2484 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2487 static struct xfrm_mgr netlink_mgr = {
2489 .notify = xfrm_send_state_notify,
2490 .acquire = xfrm_send_acquire,
2491 .compile_policy = xfrm_compile_policy,
2492 .notify_policy = xfrm_send_policy_notify,
2493 .report = xfrm_send_report,
2494 .migrate = xfrm_send_migrate,
2497 static int __init xfrm_user_init(void)
2501 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2503 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2504 xfrm_netlink_rcv, NULL, THIS_MODULE);
2507 rcu_assign_pointer(xfrm_nl, nlsk);
2509 xfrm_register_km(&netlink_mgr);
2514 static void __exit xfrm_user_exit(void)
2516 struct sock *nlsk = xfrm_nl;
2518 xfrm_unregister_km(&netlink_mgr);
2519 rcu_assign_pointer(xfrm_nl, NULL);
2521 sock_release(nlsk->sk_socket);
2524 module_init(xfrm_user_init);
2525 module_exit(xfrm_user_exit);
2526 MODULE_LICENSE("GPL");
2527 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);