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);
1109 xfrm_policy_destroy(xp);
1113 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1114 struct nlattr **attrs)
1116 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1117 struct xfrm_policy *xp;
1122 err = verify_newpolicy_info(p);
1125 err = verify_sec_ctx_len(attrs);
1129 xp = xfrm_policy_construct(p, attrs, &err);
1133 /* shouldnt excl be based on nlh flags??
1134 * Aha! this is anti-netlink really i.e more pfkey derived
1135 * in netlink excl is a flag and you wouldnt need
1136 * a type XFRM_MSG_UPDPOLICY - JHS */
1137 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1138 err = xfrm_policy_insert(p->dir, xp, excl);
1139 xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid,
1140 NETLINK_CB(skb).sid);
1143 security_xfrm_policy_free(xp);
1148 c.event = nlh->nlmsg_type;
1149 c.seq = nlh->nlmsg_seq;
1150 c.pid = nlh->nlmsg_pid;
1151 km_policy_notify(xp, p->dir, &c);
1158 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1160 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1163 if (xp->xfrm_nr == 0)
1166 for (i = 0; i < xp->xfrm_nr; i++) {
1167 struct xfrm_user_tmpl *up = &vec[i];
1168 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1170 memcpy(&up->id, &kp->id, sizeof(up->id));
1171 up->family = kp->encap_family;
1172 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1173 up->reqid = kp->reqid;
1174 up->mode = kp->mode;
1175 up->share = kp->share;
1176 up->optional = kp->optional;
1177 up->aalgos = kp->aalgos;
1178 up->ealgos = kp->ealgos;
1179 up->calgos = kp->calgos;
1182 return nla_put(skb, XFRMA_TMPL,
1183 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1186 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1189 return copy_sec_ctx(x->security, skb);
1194 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1197 return copy_sec_ctx(xp->security, skb);
1201 static inline size_t userpolicy_type_attrsize(void)
1203 #ifdef CONFIG_XFRM_SUB_POLICY
1204 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1210 #ifdef CONFIG_XFRM_SUB_POLICY
1211 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1213 struct xfrm_userpolicy_type upt = {
1217 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1221 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1227 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1229 struct xfrm_dump_info *sp = ptr;
1230 struct xfrm_userpolicy_info *p;
1231 struct sk_buff *in_skb = sp->in_skb;
1232 struct sk_buff *skb = sp->out_skb;
1233 struct nlmsghdr *nlh;
1235 if (sp->this_idx < sp->start_idx)
1238 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1239 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1243 p = nlmsg_data(nlh);
1244 copy_to_user_policy(xp, p, dir);
1245 if (copy_to_user_tmpl(xp, skb) < 0)
1247 if (copy_to_user_sec_ctx(xp, skb))
1249 if (copy_to_user_policy_type(xp->type, skb) < 0)
1252 nlmsg_end(skb, nlh);
1258 nlmsg_cancel(skb, nlh);
1262 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1264 struct xfrm_dump_info info;
1266 info.in_skb = cb->skb;
1268 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1269 info.nlmsg_flags = NLM_F_MULTI;
1271 info.start_idx = cb->args[0];
1272 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1273 #ifdef CONFIG_XFRM_SUB_POLICY
1274 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1276 cb->args[0] = info.this_idx;
1281 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1282 struct xfrm_policy *xp,
1285 struct xfrm_dump_info info;
1286 struct sk_buff *skb;
1288 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1290 return ERR_PTR(-ENOMEM);
1292 info.in_skb = in_skb;
1294 info.nlmsg_seq = seq;
1295 info.nlmsg_flags = 0;
1296 info.this_idx = info.start_idx = 0;
1298 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1306 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1307 struct nlattr **attrs)
1309 struct xfrm_policy *xp;
1310 struct xfrm_userpolicy_id *p;
1311 u8 type = XFRM_POLICY_TYPE_MAIN;
1316 p = nlmsg_data(nlh);
1317 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1319 err = copy_from_user_policy_type(&type, attrs);
1323 err = verify_policy_dir(p->dir);
1328 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1330 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1331 struct xfrm_policy tmp;
1333 err = verify_sec_ctx_len(attrs);
1337 memset(&tmp, 0, sizeof(struct xfrm_policy));
1339 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1341 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1344 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1346 security_xfrm_policy_free(&tmp);
1352 struct sk_buff *resp_skb;
1354 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1355 if (IS_ERR(resp_skb)) {
1356 err = PTR_ERR(resp_skb);
1358 err = nlmsg_unicast(xfrm_nl, resp_skb,
1359 NETLINK_CB(skb).pid);
1362 xfrm_audit_policy_delete(xp, err ? 0 : 1,
1363 NETLINK_CB(skb).loginuid,
1364 NETLINK_CB(skb).sid);
1369 c.data.byid = p->index;
1370 c.event = nlh->nlmsg_type;
1371 c.seq = nlh->nlmsg_seq;
1372 c.pid = nlh->nlmsg_pid;
1373 km_policy_notify(xp, p->dir, &c);
1381 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1382 struct nlattr **attrs)
1385 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1386 struct xfrm_audit audit_info;
1389 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1390 audit_info.secid = NETLINK_CB(skb).sid;
1391 err = xfrm_state_flush(p->proto, &audit_info);
1394 c.data.proto = p->proto;
1395 c.event = nlh->nlmsg_type;
1396 c.seq = nlh->nlmsg_seq;
1397 c.pid = nlh->nlmsg_pid;
1398 km_state_notify(NULL, &c);
1403 static inline size_t xfrm_aevent_msgsize(void)
1405 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1406 + nla_total_size(sizeof(struct xfrm_replay_state))
1407 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1408 + nla_total_size(4) /* XFRM_AE_RTHR */
1409 + nla_total_size(4); /* XFRM_AE_ETHR */
1412 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1414 struct xfrm_aevent_id *id;
1415 struct nlmsghdr *nlh;
1417 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1421 id = nlmsg_data(nlh);
1422 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1423 id->sa_id.spi = x->id.spi;
1424 id->sa_id.family = x->props.family;
1425 id->sa_id.proto = x->id.proto;
1426 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1427 id->reqid = x->props.reqid;
1428 id->flags = c->data.aevent;
1430 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1431 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1433 if (id->flags & XFRM_AE_RTHR)
1434 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1436 if (id->flags & XFRM_AE_ETHR)
1437 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1438 x->replay_maxage * 10 / HZ);
1440 return nlmsg_end(skb, nlh);
1443 nlmsg_cancel(skb, nlh);
1447 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1448 struct nlattr **attrs)
1450 struct xfrm_state *x;
1451 struct sk_buff *r_skb;
1454 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1455 struct xfrm_usersa_id *id = &p->sa_id;
1457 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1461 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1468 * XXX: is this lock really needed - none of the other
1469 * gets lock (the concern is things getting updated
1470 * while we are still reading) - jhs
1472 spin_lock_bh(&x->lock);
1473 c.data.aevent = p->flags;
1474 c.seq = nlh->nlmsg_seq;
1475 c.pid = nlh->nlmsg_pid;
1477 if (build_aevent(r_skb, x, &c) < 0)
1479 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1480 spin_unlock_bh(&x->lock);
1485 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1486 struct nlattr **attrs)
1488 struct xfrm_state *x;
1491 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1492 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1493 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1498 /* pedantic mode - thou shalt sayeth replaceth */
1499 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1502 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1506 if (x->km.state != XFRM_STATE_VALID)
1509 spin_lock_bh(&x->lock);
1510 xfrm_update_ae_params(x, attrs);
1511 spin_unlock_bh(&x->lock);
1513 c.event = nlh->nlmsg_type;
1514 c.seq = nlh->nlmsg_seq;
1515 c.pid = nlh->nlmsg_pid;
1516 c.data.aevent = XFRM_AE_CU;
1517 km_state_notify(x, &c);
1524 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1525 struct nlattr **attrs)
1528 u8 type = XFRM_POLICY_TYPE_MAIN;
1530 struct xfrm_audit audit_info;
1532 err = copy_from_user_policy_type(&type, attrs);
1536 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1537 audit_info.secid = NETLINK_CB(skb).sid;
1538 err = xfrm_policy_flush(type, &audit_info);
1542 c.event = nlh->nlmsg_type;
1543 c.seq = nlh->nlmsg_seq;
1544 c.pid = nlh->nlmsg_pid;
1545 km_policy_notify(NULL, 0, &c);
1549 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1550 struct nlattr **attrs)
1552 struct xfrm_policy *xp;
1553 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1554 struct xfrm_userpolicy_info *p = &up->pol;
1555 u8 type = XFRM_POLICY_TYPE_MAIN;
1558 err = copy_from_user_policy_type(&type, attrs);
1563 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1565 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1566 struct xfrm_policy tmp;
1568 err = verify_sec_ctx_len(attrs);
1572 memset(&tmp, 0, sizeof(struct xfrm_policy));
1574 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1576 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1579 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1581 security_xfrm_policy_free(&tmp);
1586 read_lock(&xp->lock);
1588 read_unlock(&xp->lock);
1592 read_unlock(&xp->lock);
1595 xfrm_policy_delete(xp, p->dir);
1596 xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid,
1597 NETLINK_CB(skb).sid);
1600 // reset the timers here?
1601 printk("Dont know what to do with soft policy expire\n");
1603 km_policy_expired(xp, p->dir, up->hard, current->pid);
1610 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1611 struct nlattr **attrs)
1613 struct xfrm_state *x;
1615 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1616 struct xfrm_usersa_info *p = &ue->state;
1618 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1624 spin_lock_bh(&x->lock);
1626 if (x->km.state != XFRM_STATE_VALID)
1628 km_state_expired(x, ue->hard, current->pid);
1631 __xfrm_state_delete(x);
1632 xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid,
1633 NETLINK_CB(skb).sid);
1637 spin_unlock_bh(&x->lock);
1642 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1643 struct nlattr **attrs)
1645 struct xfrm_policy *xp;
1646 struct xfrm_user_tmpl *ut;
1648 struct nlattr *rt = attrs[XFRMA_TMPL];
1650 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1651 struct xfrm_state *x = xfrm_state_alloc();
1657 err = verify_newpolicy_info(&ua->policy);
1659 printk("BAD policy passed\n");
1665 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
1671 memcpy(&x->id, &ua->id, sizeof(ua->id));
1672 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1673 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1676 /* extract the templates and for each call km_key */
1677 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1678 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1679 memcpy(&x->id, &t->id, sizeof(x->id));
1680 x->props.mode = t->mode;
1681 x->props.reqid = t->reqid;
1682 x->props.family = ut->family;
1683 t->aalgos = ua->aalgos;
1684 t->ealgos = ua->ealgos;
1685 t->calgos = ua->calgos;
1686 err = km_query(x, t, xp);
1696 #ifdef CONFIG_XFRM_MIGRATE
1697 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1698 struct nlattr **attrs, int *num)
1700 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1701 struct xfrm_user_migrate *um;
1705 num_migrate = nla_len(rt) / sizeof(*um);
1707 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1710 for (i = 0; i < num_migrate; i++, um++, ma++) {
1711 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1712 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1713 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1714 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1716 ma->proto = um->proto;
1717 ma->mode = um->mode;
1718 ma->reqid = um->reqid;
1720 ma->old_family = um->old_family;
1721 ma->new_family = um->new_family;
1728 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1729 struct nlattr **attrs)
1731 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1732 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1737 if (attrs[XFRMA_MIGRATE] == NULL)
1740 err = copy_from_user_policy_type(&type, attrs);
1744 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1752 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1757 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1758 struct nlattr **attrs)
1760 return -ENOPROTOOPT;
1764 #ifdef CONFIG_XFRM_MIGRATE
1765 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1767 struct xfrm_user_migrate um;
1769 memset(&um, 0, sizeof(um));
1770 um.proto = m->proto;
1772 um.reqid = m->reqid;
1773 um.old_family = m->old_family;
1774 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1775 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1776 um.new_family = m->new_family;
1777 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1778 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1780 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1783 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1785 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1786 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1787 + userpolicy_type_attrsize();
1790 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1791 int num_migrate, struct xfrm_selector *sel,
1794 struct xfrm_migrate *mp;
1795 struct xfrm_userpolicy_id *pol_id;
1796 struct nlmsghdr *nlh;
1799 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1803 pol_id = nlmsg_data(nlh);
1804 /* copy data from selector, dir, and type to the pol_id */
1805 memset(pol_id, 0, sizeof(*pol_id));
1806 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1809 if (copy_to_user_policy_type(type, skb) < 0)
1812 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1813 if (copy_to_user_migrate(mp, skb) < 0)
1817 return nlmsg_end(skb, nlh);
1819 nlmsg_cancel(skb, nlh);
1823 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1824 struct xfrm_migrate *m, int num_migrate)
1826 struct sk_buff *skb;
1828 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1833 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1836 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1839 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1840 struct xfrm_migrate *m, int num_migrate)
1842 return -ENOPROTOOPT;
1846 #define XMSGSIZE(type) sizeof(struct type)
1848 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1849 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1850 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1851 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1852 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1853 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1854 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1855 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1856 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1857 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1858 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1859 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1860 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1861 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1862 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1863 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1864 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1865 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1866 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1867 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1868 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1873 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1874 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
1875 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1876 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1877 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1878 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1879 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1880 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1881 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1882 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1883 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1884 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1885 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1886 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1887 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1888 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1891 static struct xfrm_link {
1892 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1893 int (*dump)(struct sk_buff *, struct netlink_callback *);
1894 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1895 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1896 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1897 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1898 .dump = xfrm_dump_sa },
1899 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1900 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1901 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1902 .dump = xfrm_dump_policy },
1903 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1904 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1905 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1906 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1907 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1908 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1909 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1910 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1911 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1912 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1913 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1914 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1915 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1918 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1920 struct nlattr *attrs[XFRMA_MAX+1];
1921 struct xfrm_link *link;
1924 type = nlh->nlmsg_type;
1925 if (type > XFRM_MSG_MAX)
1928 type -= XFRM_MSG_BASE;
1929 link = &xfrm_dispatch[type];
1931 /* All operations require privileges, even GET */
1932 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1935 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1936 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1937 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1938 if (link->dump == NULL)
1941 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1944 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
1949 if (link->doit == NULL)
1952 return link->doit(skb, nlh, attrs);
1955 static void xfrm_netlink_rcv(struct sk_buff *skb)
1957 mutex_lock(&xfrm_cfg_mutex);
1958 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
1959 mutex_unlock(&xfrm_cfg_mutex);
1962 static inline size_t xfrm_expire_msgsize(void)
1964 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1967 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1969 struct xfrm_user_expire *ue;
1970 struct nlmsghdr *nlh;
1972 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1976 ue = nlmsg_data(nlh);
1977 copy_to_user_state(x, &ue->state);
1978 ue->hard = (c->data.hard != 0) ? 1 : 0;
1980 return nlmsg_end(skb, nlh);
1983 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1985 struct sk_buff *skb;
1987 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1991 if (build_expire(skb, x, c) < 0)
1994 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1997 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1999 struct sk_buff *skb;
2001 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2005 if (build_aevent(skb, x, c) < 0)
2008 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2011 static int xfrm_notify_sa_flush(struct km_event *c)
2013 struct xfrm_usersa_flush *p;
2014 struct nlmsghdr *nlh;
2015 struct sk_buff *skb;
2016 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2018 skb = nlmsg_new(len, GFP_ATOMIC);
2022 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2028 p = nlmsg_data(nlh);
2029 p->proto = c->data.proto;
2031 nlmsg_end(skb, nlh);
2033 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2036 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2040 l += nla_total_size(aead_len(x->aead));
2042 l += nla_total_size(xfrm_alg_len(x->aalg));
2044 l += nla_total_size(xfrm_alg_len(x->ealg));
2046 l += nla_total_size(sizeof(*x->calg));
2048 l += nla_total_size(sizeof(*x->encap));
2050 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2051 x->security->ctx_len);
2053 l += nla_total_size(sizeof(*x->coaddr));
2055 /* Must count x->lastused as it may become non-zero behind our back. */
2056 l += nla_total_size(sizeof(u64));
2061 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2063 struct xfrm_usersa_info *p;
2064 struct xfrm_usersa_id *id;
2065 struct nlmsghdr *nlh;
2066 struct sk_buff *skb;
2067 int len = xfrm_sa_len(x);
2070 headlen = sizeof(*p);
2071 if (c->event == XFRM_MSG_DELSA) {
2072 len += nla_total_size(headlen);
2073 headlen = sizeof(*id);
2075 len += NLMSG_ALIGN(headlen);
2077 skb = nlmsg_new(len, GFP_ATOMIC);
2081 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2083 goto nla_put_failure;
2085 p = nlmsg_data(nlh);
2086 if (c->event == XFRM_MSG_DELSA) {
2087 struct nlattr *attr;
2089 id = nlmsg_data(nlh);
2090 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2091 id->spi = x->id.spi;
2092 id->family = x->props.family;
2093 id->proto = x->id.proto;
2095 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2097 goto nla_put_failure;
2102 if (copy_to_user_state_extra(x, p, skb))
2103 goto nla_put_failure;
2105 nlmsg_end(skb, nlh);
2107 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2110 /* Somebody screwed up with xfrm_sa_len! */
2116 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2120 case XFRM_MSG_EXPIRE:
2121 return xfrm_exp_state_notify(x, c);
2122 case XFRM_MSG_NEWAE:
2123 return xfrm_aevent_state_notify(x, c);
2124 case XFRM_MSG_DELSA:
2125 case XFRM_MSG_UPDSA:
2126 case XFRM_MSG_NEWSA:
2127 return xfrm_notify_sa(x, c);
2128 case XFRM_MSG_FLUSHSA:
2129 return xfrm_notify_sa_flush(c);
2131 printk("xfrm_user: Unknown SA event %d\n", c->event);
2139 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2140 struct xfrm_policy *xp)
2142 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2143 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2144 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2145 + userpolicy_type_attrsize();
2148 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2149 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2152 struct xfrm_user_acquire *ua;
2153 struct nlmsghdr *nlh;
2154 __u32 seq = xfrm_get_acqseq();
2156 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2160 ua = nlmsg_data(nlh);
2161 memcpy(&ua->id, &x->id, sizeof(ua->id));
2162 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2163 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2164 copy_to_user_policy(xp, &ua->policy, dir);
2165 ua->aalgos = xt->aalgos;
2166 ua->ealgos = xt->ealgos;
2167 ua->calgos = xt->calgos;
2168 ua->seq = x->km.seq = seq;
2170 if (copy_to_user_tmpl(xp, skb) < 0)
2172 if (copy_to_user_state_sec_ctx(x, skb))
2174 if (copy_to_user_policy_type(xp->type, skb) < 0)
2177 return nlmsg_end(skb, nlh);
2180 nlmsg_cancel(skb, nlh);
2184 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2185 struct xfrm_policy *xp, int dir)
2187 struct sk_buff *skb;
2189 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2193 if (build_acquire(skb, x, xt, xp, dir) < 0)
2196 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2199 /* User gives us xfrm_user_policy_info followed by an array of 0
2200 * or more templates.
2202 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2203 u8 *data, int len, int *dir)
2205 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2206 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2207 struct xfrm_policy *xp;
2210 switch (sk->sk_family) {
2212 if (opt != IP_XFRM_POLICY) {
2217 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2219 if (opt != IPV6_XFRM_POLICY) {
2232 if (len < sizeof(*p) ||
2233 verify_newpolicy_info(p))
2236 nr = ((len - sizeof(*p)) / sizeof(*ut));
2237 if (validate_tmpl(nr, ut, p->sel.family))
2240 if (p->dir > XFRM_POLICY_OUT)
2243 xp = xfrm_policy_alloc(GFP_KERNEL);
2249 copy_from_user_policy(xp, p);
2250 xp->type = XFRM_POLICY_TYPE_MAIN;
2251 copy_templates(xp, ut, nr);
2258 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2260 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2261 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2262 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2263 + userpolicy_type_attrsize();
2266 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2267 int dir, struct km_event *c)
2269 struct xfrm_user_polexpire *upe;
2270 struct nlmsghdr *nlh;
2271 int hard = c->data.hard;
2273 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2277 upe = nlmsg_data(nlh);
2278 copy_to_user_policy(xp, &upe->pol, dir);
2279 if (copy_to_user_tmpl(xp, skb) < 0)
2281 if (copy_to_user_sec_ctx(xp, skb))
2283 if (copy_to_user_policy_type(xp->type, skb) < 0)
2287 return nlmsg_end(skb, nlh);
2290 nlmsg_cancel(skb, nlh);
2294 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2296 struct sk_buff *skb;
2298 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2302 if (build_polexpire(skb, xp, dir, c) < 0)
2305 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2308 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2310 struct xfrm_userpolicy_info *p;
2311 struct xfrm_userpolicy_id *id;
2312 struct nlmsghdr *nlh;
2313 struct sk_buff *skb;
2314 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2317 headlen = sizeof(*p);
2318 if (c->event == XFRM_MSG_DELPOLICY) {
2319 len += nla_total_size(headlen);
2320 headlen = sizeof(*id);
2322 len += userpolicy_type_attrsize();
2323 len += NLMSG_ALIGN(headlen);
2325 skb = nlmsg_new(len, GFP_ATOMIC);
2329 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2333 p = nlmsg_data(nlh);
2334 if (c->event == XFRM_MSG_DELPOLICY) {
2335 struct nlattr *attr;
2337 id = nlmsg_data(nlh);
2338 memset(id, 0, sizeof(*id));
2341 id->index = xp->index;
2343 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2345 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2352 copy_to_user_policy(xp, p, dir);
2353 if (copy_to_user_tmpl(xp, skb) < 0)
2355 if (copy_to_user_policy_type(xp->type, skb) < 0)
2358 nlmsg_end(skb, nlh);
2360 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2367 static int xfrm_notify_policy_flush(struct km_event *c)
2369 struct nlmsghdr *nlh;
2370 struct sk_buff *skb;
2372 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2376 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2379 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2382 nlmsg_end(skb, nlh);
2384 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2391 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2395 case XFRM_MSG_NEWPOLICY:
2396 case XFRM_MSG_UPDPOLICY:
2397 case XFRM_MSG_DELPOLICY:
2398 return xfrm_notify_policy(xp, dir, c);
2399 case XFRM_MSG_FLUSHPOLICY:
2400 return xfrm_notify_policy_flush(c);
2401 case XFRM_MSG_POLEXPIRE:
2402 return xfrm_exp_policy_notify(xp, dir, c);
2404 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2411 static inline size_t xfrm_report_msgsize(void)
2413 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2416 static int build_report(struct sk_buff *skb, u8 proto,
2417 struct xfrm_selector *sel, xfrm_address_t *addr)
2419 struct xfrm_user_report *ur;
2420 struct nlmsghdr *nlh;
2422 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2426 ur = nlmsg_data(nlh);
2428 memcpy(&ur->sel, sel, sizeof(ur->sel));
2431 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2433 return nlmsg_end(skb, nlh);
2436 nlmsg_cancel(skb, nlh);
2440 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2441 xfrm_address_t *addr)
2443 struct sk_buff *skb;
2445 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2449 if (build_report(skb, proto, sel, addr) < 0)
2452 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2455 static struct xfrm_mgr netlink_mgr = {
2457 .notify = xfrm_send_state_notify,
2458 .acquire = xfrm_send_acquire,
2459 .compile_policy = xfrm_compile_policy,
2460 .notify_policy = xfrm_send_policy_notify,
2461 .report = xfrm_send_report,
2462 .migrate = xfrm_send_migrate,
2465 static int __init xfrm_user_init(void)
2469 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2471 nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,
2472 xfrm_netlink_rcv, NULL, THIS_MODULE);
2475 rcu_assign_pointer(xfrm_nl, nlsk);
2477 xfrm_register_km(&netlink_mgr);
2482 static void __exit xfrm_user_exit(void)
2484 struct sock *nlsk = xfrm_nl;
2486 xfrm_unregister_km(&netlink_mgr);
2487 rcu_assign_pointer(xfrm_nl, NULL);
2489 netlink_kernel_release(nlsk);
2492 module_init(xfrm_user_init);
2493 module_exit(xfrm_user_exit);
2494 MODULE_LICENSE("GPL");
2495 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);