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/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
29 #include <asm/uaccess.h>
30 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31 #include <linux/in6.h>
34 static inline int aead_len(struct xfrm_algo_aead *alg)
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
39 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
41 struct nlattr *rt = attrs[type];
42 struct xfrm_algo *algp;
48 if (nla_len(rt) < xfrm_alg_len(algp))
53 if (!algp->alg_key_len &&
54 strcmp(algp->alg_name, "digest_null") != 0)
59 if (!algp->alg_key_len &&
60 strcmp(algp->alg_name, "cipher_null") != 0)
65 /* Zero length keys are legal. */
72 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
76 static int verify_aead(struct nlattr **attrs)
78 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
79 struct xfrm_algo_aead *algp;
85 if (nla_len(rt) < aead_len(algp))
88 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
92 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
93 xfrm_address_t **addrp)
95 struct nlattr *rt = attrs[type];
98 *addrp = nla_data(rt);
101 static inline int verify_sec_ctx_len(struct nlattr **attrs)
103 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
104 struct xfrm_user_sec_ctx *uctx;
110 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
117 static int verify_newsa_info(struct xfrm_usersa_info *p,
118 struct nlattr **attrs)
128 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
140 switch (p->id.proto) {
142 if (!attrs[XFRMA_ALG_AUTH] ||
143 attrs[XFRMA_ALG_AEAD] ||
144 attrs[XFRMA_ALG_CRYPT] ||
145 attrs[XFRMA_ALG_COMP])
150 if (attrs[XFRMA_ALG_COMP])
152 if (!attrs[XFRMA_ALG_AUTH] &&
153 !attrs[XFRMA_ALG_CRYPT] &&
154 !attrs[XFRMA_ALG_AEAD])
156 if ((attrs[XFRMA_ALG_AUTH] ||
157 attrs[XFRMA_ALG_CRYPT]) &&
158 attrs[XFRMA_ALG_AEAD])
163 if (!attrs[XFRMA_ALG_COMP] ||
164 attrs[XFRMA_ALG_AEAD] ||
165 attrs[XFRMA_ALG_AUTH] ||
166 attrs[XFRMA_ALG_CRYPT])
170 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
171 case IPPROTO_DSTOPTS:
172 case IPPROTO_ROUTING:
173 if (attrs[XFRMA_ALG_COMP] ||
174 attrs[XFRMA_ALG_AUTH] ||
175 attrs[XFRMA_ALG_AEAD] ||
176 attrs[XFRMA_ALG_CRYPT] ||
177 attrs[XFRMA_ENCAP] ||
178 attrs[XFRMA_SEC_CTX] ||
179 !attrs[XFRMA_COADDR])
188 if ((err = verify_aead(attrs)))
190 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
192 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
194 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
196 if ((err = verify_sec_ctx_len(attrs)))
201 case XFRM_MODE_TRANSPORT:
202 case XFRM_MODE_TUNNEL:
203 case XFRM_MODE_ROUTEOPTIMIZATION:
217 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
218 struct xfrm_algo_desc *(*get_byname)(char *, int),
221 struct xfrm_algo *p, *ualg;
222 struct xfrm_algo_desc *algo;
227 ualg = nla_data(rta);
229 algo = get_byname(ualg->alg_name, 1);
232 *props = algo->desc.sadb_alg_id;
234 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
238 strcpy(p->alg_name, algo->name);
243 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
246 struct xfrm_algo_aead *p, *ualg;
247 struct xfrm_algo_desc *algo;
252 ualg = nla_data(rta);
254 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
257 *props = algo->desc.sadb_alg_id;
259 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
263 strcpy(p->alg_name, algo->name);
268 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
273 len += sizeof(struct xfrm_user_sec_ctx);
274 len += xfrm_ctx->ctx_len;
279 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
281 memcpy(&x->id, &p->id, sizeof(x->id));
282 memcpy(&x->sel, &p->sel, sizeof(x->sel));
283 memcpy(&x->lft, &p->lft, sizeof(x->lft));
284 x->props.mode = p->mode;
285 x->props.replay_window = p->replay_window;
286 x->props.reqid = p->reqid;
287 x->props.family = p->family;
288 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
289 x->props.flags = p->flags;
292 * Set inner address family if the KM left it as zero.
293 * See comment in validate_tmpl.
296 x->sel.family = p->family;
300 * someday when pfkey also has support, we could have the code
301 * somehow made shareable and move it to xfrm_state.c - JHS
304 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
306 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
307 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
308 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
309 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
312 struct xfrm_replay_state *replay;
313 replay = nla_data(rp);
314 memcpy(&x->replay, replay, sizeof(*replay));
315 memcpy(&x->preplay, replay, sizeof(*replay));
319 struct xfrm_lifetime_cur *ltime;
320 ltime = nla_data(lt);
321 x->curlft.bytes = ltime->bytes;
322 x->curlft.packets = ltime->packets;
323 x->curlft.add_time = ltime->add_time;
324 x->curlft.use_time = ltime->use_time;
328 x->replay_maxage = nla_get_u32(et);
331 x->replay_maxdiff = nla_get_u32(rt);
334 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
335 struct nlattr **attrs,
338 struct xfrm_state *x = xfrm_state_alloc();
344 copy_from_user_state(x, p);
346 if ((err = attach_aead(&x->aead, &x->props.ealgo,
347 attrs[XFRMA_ALG_AEAD])))
349 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
350 xfrm_aalg_get_byname,
351 attrs[XFRMA_ALG_AUTH])))
353 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
354 xfrm_ealg_get_byname,
355 attrs[XFRMA_ALG_CRYPT])))
357 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
358 xfrm_calg_get_byname,
359 attrs[XFRMA_ALG_COMP])))
362 if (attrs[XFRMA_ENCAP]) {
363 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
364 sizeof(*x->encap), GFP_KERNEL);
365 if (x->encap == NULL)
369 if (attrs[XFRMA_COADDR]) {
370 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
371 sizeof(*x->coaddr), GFP_KERNEL);
372 if (x->coaddr == NULL)
376 err = xfrm_init_state(x);
380 if (attrs[XFRMA_SEC_CTX] &&
381 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
385 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
386 /* sysctl_xfrm_aevent_etime is in 100ms units */
387 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
388 x->preplay.bitmap = 0;
389 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
390 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
392 /* override default values from above */
394 xfrm_update_ae_params(x, attrs);
399 x->km.state = XFRM_STATE_DEAD;
406 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
407 struct nlattr **attrs)
409 struct xfrm_usersa_info *p = nlmsg_data(nlh);
410 struct xfrm_state *x;
414 err = verify_newsa_info(p, attrs);
418 x = xfrm_state_construct(p, attrs, &err);
423 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
424 err = xfrm_state_add(x);
426 err = xfrm_state_update(x);
428 xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
429 NETLINK_CB(skb).sid);
432 x->km.state = XFRM_STATE_DEAD;
437 c.seq = nlh->nlmsg_seq;
438 c.pid = nlh->nlmsg_pid;
439 c.event = nlh->nlmsg_type;
441 km_state_notify(x, &c);
447 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
448 struct nlattr **attrs,
451 struct xfrm_state *x = NULL;
454 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
456 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
458 xfrm_address_t *saddr = NULL;
460 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
467 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
477 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
478 struct nlattr **attrs)
480 struct xfrm_state *x;
483 struct xfrm_usersa_id *p = nlmsg_data(nlh);
485 x = xfrm_user_state_lookup(p, attrs, &err);
489 if ((err = security_xfrm_state_delete(x)) != 0)
492 if (xfrm_state_kern(x)) {
497 err = xfrm_state_delete(x);
502 c.seq = nlh->nlmsg_seq;
503 c.pid = nlh->nlmsg_pid;
504 c.event = nlh->nlmsg_type;
505 km_state_notify(x, &c);
508 xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
509 NETLINK_CB(skb).sid);
514 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
516 memcpy(&p->id, &x->id, sizeof(p->id));
517 memcpy(&p->sel, &x->sel, sizeof(p->sel));
518 memcpy(&p->lft, &x->lft, sizeof(p->lft));
519 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
520 memcpy(&p->stats, &x->stats, sizeof(p->stats));
521 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
522 p->mode = x->props.mode;
523 p->replay_window = x->props.replay_window;
524 p->reqid = x->props.reqid;
525 p->family = x->props.family;
526 p->flags = x->props.flags;
530 struct xfrm_dump_info {
531 struct sk_buff *in_skb;
532 struct sk_buff *out_skb;
539 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
541 struct xfrm_user_sec_ctx *uctx;
543 int ctx_size = sizeof(*uctx) + s->ctx_len;
545 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
549 uctx = nla_data(attr);
550 uctx->exttype = XFRMA_SEC_CTX;
551 uctx->len = ctx_size;
552 uctx->ctx_doi = s->ctx_doi;
553 uctx->ctx_alg = s->ctx_alg;
554 uctx->ctx_len = s->ctx_len;
555 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
560 /* Don't change this without updating xfrm_sa_len! */
561 static int copy_to_user_state_extra(struct xfrm_state *x,
562 struct xfrm_usersa_info *p,
565 copy_to_user_state(x, p);
568 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
571 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
574 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
576 NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg);
578 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
580 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
583 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
585 if (x->security && copy_sec_ctx(x->security, skb) < 0)
586 goto nla_put_failure;
594 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
596 struct xfrm_dump_info *sp = ptr;
597 struct sk_buff *in_skb = sp->in_skb;
598 struct sk_buff *skb = sp->out_skb;
599 struct xfrm_usersa_info *p;
600 struct nlmsghdr *nlh;
603 if (sp->this_idx < sp->start_idx)
606 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
607 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
613 err = copy_to_user_state_extra(x, p, skb);
615 goto nla_put_failure;
623 nlmsg_cancel(skb, nlh);
627 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
629 struct xfrm_dump_info info;
631 info.in_skb = cb->skb;
633 info.nlmsg_seq = cb->nlh->nlmsg_seq;
634 info.nlmsg_flags = NLM_F_MULTI;
636 info.start_idx = cb->args[0];
637 (void) xfrm_state_walk(0, dump_one_state, &info);
638 cb->args[0] = info.this_idx;
643 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
644 struct xfrm_state *x, u32 seq)
646 struct xfrm_dump_info info;
649 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
651 return ERR_PTR(-ENOMEM);
653 info.in_skb = in_skb;
655 info.nlmsg_seq = seq;
656 info.nlmsg_flags = 0;
657 info.this_idx = info.start_idx = 0;
659 if (dump_one_state(x, 0, &info)) {
667 static inline size_t xfrm_spdinfo_msgsize(void)
669 return NLMSG_ALIGN(4)
670 + nla_total_size(sizeof(struct xfrmu_spdinfo))
671 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
674 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
676 struct xfrmk_spdinfo si;
677 struct xfrmu_spdinfo spc;
678 struct xfrmu_spdhinfo sph;
679 struct nlmsghdr *nlh;
682 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
683 if (nlh == NULL) /* shouldnt really happen ... */
688 xfrm_spd_getinfo(&si);
689 spc.incnt = si.incnt;
690 spc.outcnt = si.outcnt;
691 spc.fwdcnt = si.fwdcnt;
692 spc.inscnt = si.inscnt;
693 spc.outscnt = si.outscnt;
694 spc.fwdscnt = si.fwdscnt;
695 sph.spdhcnt = si.spdhcnt;
696 sph.spdhmcnt = si.spdhmcnt;
698 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
699 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
701 return nlmsg_end(skb, nlh);
704 nlmsg_cancel(skb, nlh);
708 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
709 struct nlattr **attrs)
711 struct sk_buff *r_skb;
712 u32 *flags = nlmsg_data(nlh);
713 u32 spid = NETLINK_CB(skb).pid;
714 u32 seq = nlh->nlmsg_seq;
716 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
720 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
723 return nlmsg_unicast(xfrm_nl, r_skb, spid);
726 static inline size_t xfrm_sadinfo_msgsize(void)
728 return NLMSG_ALIGN(4)
729 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
730 + nla_total_size(4); /* XFRMA_SAD_CNT */
733 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
735 struct xfrmk_sadinfo si;
736 struct xfrmu_sadhinfo sh;
737 struct nlmsghdr *nlh;
740 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
741 if (nlh == NULL) /* shouldnt really happen ... */
746 xfrm_sad_getinfo(&si);
748 sh.sadhmcnt = si.sadhmcnt;
749 sh.sadhcnt = si.sadhcnt;
751 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
752 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
754 return nlmsg_end(skb, nlh);
757 nlmsg_cancel(skb, nlh);
761 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
762 struct nlattr **attrs)
764 struct sk_buff *r_skb;
765 u32 *flags = nlmsg_data(nlh);
766 u32 spid = NETLINK_CB(skb).pid;
767 u32 seq = nlh->nlmsg_seq;
769 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
773 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
776 return nlmsg_unicast(xfrm_nl, r_skb, spid);
779 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
780 struct nlattr **attrs)
782 struct xfrm_usersa_id *p = nlmsg_data(nlh);
783 struct xfrm_state *x;
784 struct sk_buff *resp_skb;
787 x = xfrm_user_state_lookup(p, attrs, &err);
791 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
792 if (IS_ERR(resp_skb)) {
793 err = PTR_ERR(resp_skb);
795 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
802 static int verify_userspi_info(struct xfrm_userspi_info *p)
804 switch (p->info.id.proto) {
810 /* IPCOMP spi is 16-bits. */
811 if (p->max >= 0x10000)
825 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
826 struct nlattr **attrs)
828 struct xfrm_state *x;
829 struct xfrm_userspi_info *p;
830 struct sk_buff *resp_skb;
831 xfrm_address_t *daddr;
836 err = verify_userspi_info(p);
840 family = p->info.family;
841 daddr = &p->info.id.daddr;
845 x = xfrm_find_acq_byseq(p->info.seq);
846 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
853 x = xfrm_find_acq(p->info.mode, p->info.reqid,
854 p->info.id.proto, daddr,
861 err = xfrm_alloc_spi(x, p->min, p->max);
865 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
866 if (IS_ERR(resp_skb)) {
867 err = PTR_ERR(resp_skb);
871 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
879 static int verify_policy_dir(u8 dir)
883 case XFRM_POLICY_OUT:
884 case XFRM_POLICY_FWD:
894 static int verify_policy_type(u8 type)
897 case XFRM_POLICY_TYPE_MAIN:
898 #ifdef CONFIG_XFRM_SUB_POLICY
899 case XFRM_POLICY_TYPE_SUB:
910 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
914 case XFRM_SHARE_SESSION:
915 case XFRM_SHARE_USER:
916 case XFRM_SHARE_UNIQUE:
924 case XFRM_POLICY_ALLOW:
925 case XFRM_POLICY_BLOCK:
932 switch (p->sel.family) {
937 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
940 return -EAFNOSUPPORT;
947 return verify_policy_dir(p->dir);
950 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
952 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
953 struct xfrm_user_sec_ctx *uctx;
959 return security_xfrm_policy_alloc(pol, uctx);
962 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
968 for (i = 0; i < nr; i++, ut++) {
969 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
971 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
972 memcpy(&t->saddr, &ut->saddr,
973 sizeof(xfrm_address_t));
974 t->reqid = ut->reqid;
976 t->share = ut->share;
977 t->optional = ut->optional;
978 t->aalgos = ut->aalgos;
979 t->ealgos = ut->ealgos;
980 t->calgos = ut->calgos;
981 t->encap_family = ut->family;
985 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
989 if (nr > XFRM_MAX_DEPTH)
992 for (i = 0; i < nr; i++) {
993 /* We never validated the ut->family value, so many
994 * applications simply leave it at zero. The check was
995 * never made and ut->family was ignored because all
996 * templates could be assumed to have the same family as
997 * the policy itself. Now that we will have ipv4-in-ipv6
998 * and ipv6-in-ipv4 tunnels, this is no longer true.
1001 ut[i].family = family;
1003 switch (ut[i].family) {
1006 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1018 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1020 struct nlattr *rt = attrs[XFRMA_TMPL];
1025 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1026 int nr = nla_len(rt) / sizeof(*utmpl);
1029 err = validate_tmpl(nr, utmpl, pol->family);
1033 copy_templates(pol, utmpl, nr);
1038 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1040 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1041 struct xfrm_userpolicy_type *upt;
1042 u8 type = XFRM_POLICY_TYPE_MAIN;
1050 err = verify_policy_type(type);
1058 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1060 xp->priority = p->priority;
1061 xp->index = p->index;
1062 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1063 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1064 xp->action = p->action;
1065 xp->flags = p->flags;
1066 xp->family = p->sel.family;
1067 /* XXX xp->share = p->share; */
1070 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1072 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1073 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1074 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1075 p->priority = xp->priority;
1076 p->index = xp->index;
1077 p->sel.family = xp->family;
1079 p->action = xp->action;
1080 p->flags = xp->flags;
1081 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1084 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1086 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1094 copy_from_user_policy(xp, p);
1096 err = copy_from_user_policy_type(&xp->type, attrs);
1100 if (!(err = copy_from_user_tmpl(xp, attrs)))
1101 err = copy_from_user_sec_ctx(xp, attrs);
1108 xfrm_policy_destroy(xp);
1112 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1113 struct nlattr **attrs)
1115 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1116 struct xfrm_policy *xp;
1121 err = verify_newpolicy_info(p);
1124 err = verify_sec_ctx_len(attrs);
1128 xp = xfrm_policy_construct(p, attrs, &err);
1132 /* shouldnt excl be based on nlh flags??
1133 * Aha! this is anti-netlink really i.e more pfkey derived
1134 * in netlink excl is a flag and you wouldnt need
1135 * a type XFRM_MSG_UPDPOLICY - JHS */
1136 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1137 err = xfrm_policy_insert(p->dir, xp, excl);
1138 xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid,
1139 NETLINK_CB(skb).sid);
1142 security_xfrm_policy_free(xp);
1147 c.event = nlh->nlmsg_type;
1148 c.seq = nlh->nlmsg_seq;
1149 c.pid = nlh->nlmsg_pid;
1150 km_policy_notify(xp, p->dir, &c);
1157 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1159 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1162 if (xp->xfrm_nr == 0)
1165 for (i = 0; i < xp->xfrm_nr; i++) {
1166 struct xfrm_user_tmpl *up = &vec[i];
1167 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1169 memcpy(&up->id, &kp->id, sizeof(up->id));
1170 up->family = kp->encap_family;
1171 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1172 up->reqid = kp->reqid;
1173 up->mode = kp->mode;
1174 up->share = kp->share;
1175 up->optional = kp->optional;
1176 up->aalgos = kp->aalgos;
1177 up->ealgos = kp->ealgos;
1178 up->calgos = kp->calgos;
1181 return nla_put(skb, XFRMA_TMPL,
1182 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1185 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1188 return copy_sec_ctx(x->security, skb);
1193 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1196 return copy_sec_ctx(xp->security, skb);
1200 static inline size_t userpolicy_type_attrsize(void)
1202 #ifdef CONFIG_XFRM_SUB_POLICY
1203 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1209 #ifdef CONFIG_XFRM_SUB_POLICY
1210 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1212 struct xfrm_userpolicy_type upt = {
1216 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1220 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1226 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1228 struct xfrm_dump_info *sp = ptr;
1229 struct xfrm_userpolicy_info *p;
1230 struct sk_buff *in_skb = sp->in_skb;
1231 struct sk_buff *skb = sp->out_skb;
1232 struct nlmsghdr *nlh;
1234 if (sp->this_idx < sp->start_idx)
1237 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1238 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1242 p = nlmsg_data(nlh);
1243 copy_to_user_policy(xp, p, dir);
1244 if (copy_to_user_tmpl(xp, skb) < 0)
1246 if (copy_to_user_sec_ctx(xp, skb))
1248 if (copy_to_user_policy_type(xp->type, skb) < 0)
1251 nlmsg_end(skb, nlh);
1257 nlmsg_cancel(skb, nlh);
1261 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1263 struct xfrm_dump_info info;
1265 info.in_skb = cb->skb;
1267 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1268 info.nlmsg_flags = NLM_F_MULTI;
1270 info.start_idx = cb->args[0];
1271 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1272 #ifdef CONFIG_XFRM_SUB_POLICY
1273 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1275 cb->args[0] = info.this_idx;
1280 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1281 struct xfrm_policy *xp,
1284 struct xfrm_dump_info info;
1285 struct sk_buff *skb;
1287 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1289 return ERR_PTR(-ENOMEM);
1291 info.in_skb = in_skb;
1293 info.nlmsg_seq = seq;
1294 info.nlmsg_flags = 0;
1295 info.this_idx = info.start_idx = 0;
1297 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1305 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1306 struct nlattr **attrs)
1308 struct xfrm_policy *xp;
1309 struct xfrm_userpolicy_id *p;
1310 u8 type = XFRM_POLICY_TYPE_MAIN;
1315 p = nlmsg_data(nlh);
1316 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1318 err = copy_from_user_policy_type(&type, attrs);
1322 err = verify_policy_dir(p->dir);
1327 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1329 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1330 struct xfrm_policy tmp;
1332 err = verify_sec_ctx_len(attrs);
1336 memset(&tmp, 0, sizeof(struct xfrm_policy));
1338 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1340 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1343 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1345 security_xfrm_policy_free(&tmp);
1351 struct sk_buff *resp_skb;
1353 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1354 if (IS_ERR(resp_skb)) {
1355 err = PTR_ERR(resp_skb);
1357 err = nlmsg_unicast(xfrm_nl, resp_skb,
1358 NETLINK_CB(skb).pid);
1361 xfrm_audit_policy_delete(xp, err ? 0 : 1,
1362 NETLINK_CB(skb).loginuid,
1363 NETLINK_CB(skb).sid);
1368 c.data.byid = p->index;
1369 c.event = nlh->nlmsg_type;
1370 c.seq = nlh->nlmsg_seq;
1371 c.pid = nlh->nlmsg_pid;
1372 km_policy_notify(xp, p->dir, &c);
1380 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1381 struct nlattr **attrs)
1384 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1385 struct xfrm_audit audit_info;
1388 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1389 audit_info.secid = NETLINK_CB(skb).sid;
1390 err = xfrm_state_flush(p->proto, &audit_info);
1393 c.data.proto = p->proto;
1394 c.event = nlh->nlmsg_type;
1395 c.seq = nlh->nlmsg_seq;
1396 c.pid = nlh->nlmsg_pid;
1397 km_state_notify(NULL, &c);
1402 static inline size_t xfrm_aevent_msgsize(void)
1404 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1405 + nla_total_size(sizeof(struct xfrm_replay_state))
1406 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1407 + nla_total_size(4) /* XFRM_AE_RTHR */
1408 + nla_total_size(4); /* XFRM_AE_ETHR */
1411 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1413 struct xfrm_aevent_id *id;
1414 struct nlmsghdr *nlh;
1416 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1420 id = nlmsg_data(nlh);
1421 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1422 id->sa_id.spi = x->id.spi;
1423 id->sa_id.family = x->props.family;
1424 id->sa_id.proto = x->id.proto;
1425 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1426 id->reqid = x->props.reqid;
1427 id->flags = c->data.aevent;
1429 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1430 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1432 if (id->flags & XFRM_AE_RTHR)
1433 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1435 if (id->flags & XFRM_AE_ETHR)
1436 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1437 x->replay_maxage * 10 / HZ);
1439 return nlmsg_end(skb, nlh);
1442 nlmsg_cancel(skb, nlh);
1446 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1447 struct nlattr **attrs)
1449 struct xfrm_state *x;
1450 struct sk_buff *r_skb;
1453 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1454 struct xfrm_usersa_id *id = &p->sa_id;
1456 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1460 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1467 * XXX: is this lock really needed - none of the other
1468 * gets lock (the concern is things getting updated
1469 * while we are still reading) - jhs
1471 spin_lock_bh(&x->lock);
1472 c.data.aevent = p->flags;
1473 c.seq = nlh->nlmsg_seq;
1474 c.pid = nlh->nlmsg_pid;
1476 if (build_aevent(r_skb, x, &c) < 0)
1478 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1479 spin_unlock_bh(&x->lock);
1484 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1485 struct nlattr **attrs)
1487 struct xfrm_state *x;
1490 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1491 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1492 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1497 /* pedantic mode - thou shalt sayeth replaceth */
1498 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1501 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1505 if (x->km.state != XFRM_STATE_VALID)
1508 spin_lock_bh(&x->lock);
1509 xfrm_update_ae_params(x, attrs);
1510 spin_unlock_bh(&x->lock);
1512 c.event = nlh->nlmsg_type;
1513 c.seq = nlh->nlmsg_seq;
1514 c.pid = nlh->nlmsg_pid;
1515 c.data.aevent = XFRM_AE_CU;
1516 km_state_notify(x, &c);
1523 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1524 struct nlattr **attrs)
1527 u8 type = XFRM_POLICY_TYPE_MAIN;
1529 struct xfrm_audit audit_info;
1531 err = copy_from_user_policy_type(&type, attrs);
1535 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1536 audit_info.secid = NETLINK_CB(skb).sid;
1537 err = xfrm_policy_flush(type, &audit_info);
1541 c.event = nlh->nlmsg_type;
1542 c.seq = nlh->nlmsg_seq;
1543 c.pid = nlh->nlmsg_pid;
1544 km_policy_notify(NULL, 0, &c);
1548 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1549 struct nlattr **attrs)
1551 struct xfrm_policy *xp;
1552 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1553 struct xfrm_userpolicy_info *p = &up->pol;
1554 u8 type = XFRM_POLICY_TYPE_MAIN;
1557 err = copy_from_user_policy_type(&type, attrs);
1562 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1564 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1565 struct xfrm_policy tmp;
1567 err = verify_sec_ctx_len(attrs);
1571 memset(&tmp, 0, sizeof(struct xfrm_policy));
1573 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1575 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1578 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1580 security_xfrm_policy_free(&tmp);
1585 read_lock(&xp->lock);
1587 read_unlock(&xp->lock);
1591 read_unlock(&xp->lock);
1594 xfrm_policy_delete(xp, p->dir);
1595 xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid,
1596 NETLINK_CB(skb).sid);
1599 // reset the timers here?
1600 printk("Dont know what to do with soft policy expire\n");
1602 km_policy_expired(xp, p->dir, up->hard, current->pid);
1609 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1610 struct nlattr **attrs)
1612 struct xfrm_state *x;
1614 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1615 struct xfrm_usersa_info *p = &ue->state;
1617 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1623 spin_lock_bh(&x->lock);
1625 if (x->km.state != XFRM_STATE_VALID)
1627 km_state_expired(x, ue->hard, current->pid);
1630 __xfrm_state_delete(x);
1631 xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid,
1632 NETLINK_CB(skb).sid);
1636 spin_unlock_bh(&x->lock);
1641 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1642 struct nlattr **attrs)
1644 struct xfrm_policy *xp;
1645 struct xfrm_user_tmpl *ut;
1647 struct nlattr *rt = attrs[XFRMA_TMPL];
1649 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1650 struct xfrm_state *x = xfrm_state_alloc();
1656 err = verify_newpolicy_info(&ua->policy);
1658 printk("BAD policy passed\n");
1664 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
1670 memcpy(&x->id, &ua->id, sizeof(ua->id));
1671 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1672 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1675 /* extract the templates and for each call km_key */
1676 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1677 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1678 memcpy(&x->id, &t->id, sizeof(x->id));
1679 x->props.mode = t->mode;
1680 x->props.reqid = t->reqid;
1681 x->props.family = ut->family;
1682 t->aalgos = ua->aalgos;
1683 t->ealgos = ua->ealgos;
1684 t->calgos = ua->calgos;
1685 err = km_query(x, t, xp);
1695 #ifdef CONFIG_XFRM_MIGRATE
1696 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1697 struct nlattr **attrs, int *num)
1699 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1700 struct xfrm_user_migrate *um;
1704 num_migrate = nla_len(rt) / sizeof(*um);
1706 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1709 for (i = 0; i < num_migrate; i++, um++, ma++) {
1710 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1711 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1712 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1713 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1715 ma->proto = um->proto;
1716 ma->mode = um->mode;
1717 ma->reqid = um->reqid;
1719 ma->old_family = um->old_family;
1720 ma->new_family = um->new_family;
1727 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1728 struct nlattr **attrs)
1730 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1731 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1736 if (attrs[XFRMA_MIGRATE] == NULL)
1739 err = copy_from_user_policy_type(&type, attrs);
1743 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1751 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1756 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1757 struct nlattr **attrs)
1759 return -ENOPROTOOPT;
1763 #ifdef CONFIG_XFRM_MIGRATE
1764 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1766 struct xfrm_user_migrate um;
1768 memset(&um, 0, sizeof(um));
1769 um.proto = m->proto;
1771 um.reqid = m->reqid;
1772 um.old_family = m->old_family;
1773 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1774 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1775 um.new_family = m->new_family;
1776 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1777 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1779 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1782 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1784 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1785 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1786 + userpolicy_type_attrsize();
1789 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1790 int num_migrate, struct xfrm_selector *sel,
1793 struct xfrm_migrate *mp;
1794 struct xfrm_userpolicy_id *pol_id;
1795 struct nlmsghdr *nlh;
1798 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1802 pol_id = nlmsg_data(nlh);
1803 /* copy data from selector, dir, and type to the pol_id */
1804 memset(pol_id, 0, sizeof(*pol_id));
1805 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1808 if (copy_to_user_policy_type(type, skb) < 0)
1811 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1812 if (copy_to_user_migrate(mp, skb) < 0)
1816 return nlmsg_end(skb, nlh);
1818 nlmsg_cancel(skb, nlh);
1822 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1823 struct xfrm_migrate *m, int num_migrate)
1825 struct sk_buff *skb;
1827 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1832 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1835 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1838 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1839 struct xfrm_migrate *m, int num_migrate)
1841 return -ENOPROTOOPT;
1845 #define XMSGSIZE(type) sizeof(struct type)
1847 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1848 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1849 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1850 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1851 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1852 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1853 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1854 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1855 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1856 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1857 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1858 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1859 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1860 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1861 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1862 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1863 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1864 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1865 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1866 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1867 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1872 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1873 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
1874 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1875 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1876 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1877 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1878 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1879 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1880 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1881 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1882 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1883 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1884 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1885 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1886 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1887 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1890 static struct xfrm_link {
1891 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1892 int (*dump)(struct sk_buff *, struct netlink_callback *);
1893 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1894 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1895 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1896 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1897 .dump = xfrm_dump_sa },
1898 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1899 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1900 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1901 .dump = xfrm_dump_policy },
1902 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1903 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1904 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1905 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1906 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1907 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1908 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1909 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1910 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1911 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1912 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1913 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1914 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1917 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1919 struct nlattr *attrs[XFRMA_MAX+1];
1920 struct xfrm_link *link;
1923 type = nlh->nlmsg_type;
1924 if (type > XFRM_MSG_MAX)
1927 type -= XFRM_MSG_BASE;
1928 link = &xfrm_dispatch[type];
1930 /* All operations require privileges, even GET */
1931 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1934 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1935 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1936 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1937 if (link->dump == NULL)
1940 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1943 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
1948 if (link->doit == NULL)
1951 return link->doit(skb, nlh, attrs);
1954 static void xfrm_netlink_rcv(struct sk_buff *skb)
1956 mutex_lock(&xfrm_cfg_mutex);
1957 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
1958 mutex_unlock(&xfrm_cfg_mutex);
1961 static inline size_t xfrm_expire_msgsize(void)
1963 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1966 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1968 struct xfrm_user_expire *ue;
1969 struct nlmsghdr *nlh;
1971 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1975 ue = nlmsg_data(nlh);
1976 copy_to_user_state(x, &ue->state);
1977 ue->hard = (c->data.hard != 0) ? 1 : 0;
1979 return nlmsg_end(skb, nlh);
1982 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1984 struct sk_buff *skb;
1986 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1990 if (build_expire(skb, x, c) < 0)
1993 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1996 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1998 struct sk_buff *skb;
2000 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2004 if (build_aevent(skb, x, c) < 0)
2007 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2010 static int xfrm_notify_sa_flush(struct km_event *c)
2012 struct xfrm_usersa_flush *p;
2013 struct nlmsghdr *nlh;
2014 struct sk_buff *skb;
2015 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2017 skb = nlmsg_new(len, GFP_ATOMIC);
2021 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2027 p = nlmsg_data(nlh);
2028 p->proto = c->data.proto;
2030 nlmsg_end(skb, nlh);
2032 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2035 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2039 l += nla_total_size(aead_len(x->aead));
2041 l += nla_total_size(xfrm_alg_len(x->aalg));
2043 l += nla_total_size(xfrm_alg_len(x->ealg));
2045 l += nla_total_size(sizeof(*x->calg));
2047 l += nla_total_size(sizeof(*x->encap));
2049 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2050 x->security->ctx_len);
2052 l += nla_total_size(sizeof(*x->coaddr));
2054 /* Must count x->lastused as it may become non-zero behind our back. */
2055 l += nla_total_size(sizeof(u64));
2060 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2062 struct xfrm_usersa_info *p;
2063 struct xfrm_usersa_id *id;
2064 struct nlmsghdr *nlh;
2065 struct sk_buff *skb;
2066 int len = xfrm_sa_len(x);
2069 headlen = sizeof(*p);
2070 if (c->event == XFRM_MSG_DELSA) {
2071 len += nla_total_size(headlen);
2072 headlen = sizeof(*id);
2074 len += NLMSG_ALIGN(headlen);
2076 skb = nlmsg_new(len, GFP_ATOMIC);
2080 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2082 goto nla_put_failure;
2084 p = nlmsg_data(nlh);
2085 if (c->event == XFRM_MSG_DELSA) {
2086 struct nlattr *attr;
2088 id = nlmsg_data(nlh);
2089 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2090 id->spi = x->id.spi;
2091 id->family = x->props.family;
2092 id->proto = x->id.proto;
2094 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2096 goto nla_put_failure;
2101 if (copy_to_user_state_extra(x, p, skb))
2102 goto nla_put_failure;
2104 nlmsg_end(skb, nlh);
2106 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2109 /* Somebody screwed up with xfrm_sa_len! */
2115 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2119 case XFRM_MSG_EXPIRE:
2120 return xfrm_exp_state_notify(x, c);
2121 case XFRM_MSG_NEWAE:
2122 return xfrm_aevent_state_notify(x, c);
2123 case XFRM_MSG_DELSA:
2124 case XFRM_MSG_UPDSA:
2125 case XFRM_MSG_NEWSA:
2126 return xfrm_notify_sa(x, c);
2127 case XFRM_MSG_FLUSHSA:
2128 return xfrm_notify_sa_flush(c);
2130 printk("xfrm_user: Unknown SA event %d\n", c->event);
2138 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2139 struct xfrm_policy *xp)
2141 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2142 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2143 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2144 + userpolicy_type_attrsize();
2147 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2148 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2151 struct xfrm_user_acquire *ua;
2152 struct nlmsghdr *nlh;
2153 __u32 seq = xfrm_get_acqseq();
2155 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2159 ua = nlmsg_data(nlh);
2160 memcpy(&ua->id, &x->id, sizeof(ua->id));
2161 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2162 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2163 copy_to_user_policy(xp, &ua->policy, dir);
2164 ua->aalgos = xt->aalgos;
2165 ua->ealgos = xt->ealgos;
2166 ua->calgos = xt->calgos;
2167 ua->seq = x->km.seq = seq;
2169 if (copy_to_user_tmpl(xp, skb) < 0)
2171 if (copy_to_user_state_sec_ctx(x, skb))
2173 if (copy_to_user_policy_type(xp->type, skb) < 0)
2176 return nlmsg_end(skb, nlh);
2179 nlmsg_cancel(skb, nlh);
2183 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2184 struct xfrm_policy *xp, int dir)
2186 struct sk_buff *skb;
2188 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2192 if (build_acquire(skb, x, xt, xp, dir) < 0)
2195 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2198 /* User gives us xfrm_user_policy_info followed by an array of 0
2199 * or more templates.
2201 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2202 u8 *data, int len, int *dir)
2204 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2205 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2206 struct xfrm_policy *xp;
2209 switch (sk->sk_family) {
2211 if (opt != IP_XFRM_POLICY) {
2216 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2218 if (opt != IPV6_XFRM_POLICY) {
2231 if (len < sizeof(*p) ||
2232 verify_newpolicy_info(p))
2235 nr = ((len - sizeof(*p)) / sizeof(*ut));
2236 if (validate_tmpl(nr, ut, p->sel.family))
2239 if (p->dir > XFRM_POLICY_OUT)
2242 xp = xfrm_policy_alloc(GFP_KERNEL);
2248 copy_from_user_policy(xp, p);
2249 xp->type = XFRM_POLICY_TYPE_MAIN;
2250 copy_templates(xp, ut, nr);
2257 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2259 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2260 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2261 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2262 + userpolicy_type_attrsize();
2265 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2266 int dir, struct km_event *c)
2268 struct xfrm_user_polexpire *upe;
2269 struct nlmsghdr *nlh;
2270 int hard = c->data.hard;
2272 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2276 upe = nlmsg_data(nlh);
2277 copy_to_user_policy(xp, &upe->pol, dir);
2278 if (copy_to_user_tmpl(xp, skb) < 0)
2280 if (copy_to_user_sec_ctx(xp, skb))
2282 if (copy_to_user_policy_type(xp->type, skb) < 0)
2286 return nlmsg_end(skb, nlh);
2289 nlmsg_cancel(skb, nlh);
2293 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2295 struct sk_buff *skb;
2297 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2301 if (build_polexpire(skb, xp, dir, c) < 0)
2304 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2307 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2309 struct xfrm_userpolicy_info *p;
2310 struct xfrm_userpolicy_id *id;
2311 struct nlmsghdr *nlh;
2312 struct sk_buff *skb;
2313 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2316 headlen = sizeof(*p);
2317 if (c->event == XFRM_MSG_DELPOLICY) {
2318 len += nla_total_size(headlen);
2319 headlen = sizeof(*id);
2321 len += userpolicy_type_attrsize();
2322 len += NLMSG_ALIGN(headlen);
2324 skb = nlmsg_new(len, GFP_ATOMIC);
2328 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2332 p = nlmsg_data(nlh);
2333 if (c->event == XFRM_MSG_DELPOLICY) {
2334 struct nlattr *attr;
2336 id = nlmsg_data(nlh);
2337 memset(id, 0, sizeof(*id));
2340 id->index = xp->index;
2342 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2344 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2351 copy_to_user_policy(xp, p, dir);
2352 if (copy_to_user_tmpl(xp, skb) < 0)
2354 if (copy_to_user_policy_type(xp->type, skb) < 0)
2357 nlmsg_end(skb, nlh);
2359 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2366 static int xfrm_notify_policy_flush(struct km_event *c)
2368 struct nlmsghdr *nlh;
2369 struct sk_buff *skb;
2371 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2375 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2378 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2381 nlmsg_end(skb, nlh);
2383 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2390 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2394 case XFRM_MSG_NEWPOLICY:
2395 case XFRM_MSG_UPDPOLICY:
2396 case XFRM_MSG_DELPOLICY:
2397 return xfrm_notify_policy(xp, dir, c);
2398 case XFRM_MSG_FLUSHPOLICY:
2399 return xfrm_notify_policy_flush(c);
2400 case XFRM_MSG_POLEXPIRE:
2401 return xfrm_exp_policy_notify(xp, dir, c);
2403 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2410 static inline size_t xfrm_report_msgsize(void)
2412 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2415 static int build_report(struct sk_buff *skb, u8 proto,
2416 struct xfrm_selector *sel, xfrm_address_t *addr)
2418 struct xfrm_user_report *ur;
2419 struct nlmsghdr *nlh;
2421 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2425 ur = nlmsg_data(nlh);
2427 memcpy(&ur->sel, sel, sizeof(ur->sel));
2430 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2432 return nlmsg_end(skb, nlh);
2435 nlmsg_cancel(skb, nlh);
2439 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2440 xfrm_address_t *addr)
2442 struct sk_buff *skb;
2444 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2448 if (build_report(skb, proto, sel, addr) < 0)
2451 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2454 static struct xfrm_mgr netlink_mgr = {
2456 .notify = xfrm_send_state_notify,
2457 .acquire = xfrm_send_acquire,
2458 .compile_policy = xfrm_compile_policy,
2459 .notify_policy = xfrm_send_policy_notify,
2460 .report = xfrm_send_report,
2461 .migrate = xfrm_send_migrate,
2464 static int __init xfrm_user_init(void)
2468 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2470 nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,
2471 xfrm_netlink_rcv, NULL, THIS_MODULE);
2474 rcu_assign_pointer(xfrm_nl, nlsk);
2476 xfrm_register_km(&netlink_mgr);
2481 static void __exit xfrm_user_exit(void)
2483 struct sock *nlsk = xfrm_nl;
2485 xfrm_unregister_km(&netlink_mgr);
2486 rcu_assign_pointer(xfrm_nl, NULL);
2488 netlink_kernel_release(nlsk);
2491 module_init(xfrm_user_init);
2492 module_exit(xfrm_user_exit);
2493 MODULE_LICENSE("GPL");
2494 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);