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 alg_len(struct xfrm_algo *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) < 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 void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
77 xfrm_address_t **addrp)
79 struct nlattr *rt = attrs[type];
82 *addrp = nla_data(rt);
85 static inline int verify_sec_ctx_len(struct nlattr **attrs)
87 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
88 struct xfrm_user_sec_ctx *uctx;
94 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
101 static int verify_newsa_info(struct xfrm_usersa_info *p,
102 struct nlattr **attrs)
112 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
124 switch (p->id.proto) {
126 if (!attrs[XFRMA_ALG_AUTH] ||
127 attrs[XFRMA_ALG_CRYPT] ||
128 attrs[XFRMA_ALG_COMP])
133 if ((!attrs[XFRMA_ALG_AUTH] &&
134 !attrs[XFRMA_ALG_CRYPT]) ||
135 attrs[XFRMA_ALG_COMP])
140 if (!attrs[XFRMA_ALG_COMP] ||
141 attrs[XFRMA_ALG_AUTH] ||
142 attrs[XFRMA_ALG_CRYPT])
146 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
147 case IPPROTO_DSTOPTS:
148 case IPPROTO_ROUTING:
149 if (attrs[XFRMA_ALG_COMP] ||
150 attrs[XFRMA_ALG_AUTH] ||
151 attrs[XFRMA_ALG_CRYPT] ||
152 attrs[XFRMA_ENCAP] ||
153 attrs[XFRMA_SEC_CTX] ||
154 !attrs[XFRMA_COADDR])
163 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
165 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
167 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
169 if ((err = verify_sec_ctx_len(attrs)))
174 case XFRM_MODE_TRANSPORT:
175 case XFRM_MODE_TUNNEL:
176 case XFRM_MODE_ROUTEOPTIMIZATION:
190 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
191 struct xfrm_algo_desc *(*get_byname)(char *, int),
194 struct xfrm_algo *p, *ualg;
195 struct xfrm_algo_desc *algo;
200 ualg = nla_data(rta);
202 algo = get_byname(ualg->alg_name, 1);
205 *props = algo->desc.sadb_alg_id;
207 p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
211 strcpy(p->alg_name, algo->name);
216 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
221 len += sizeof(struct xfrm_user_sec_ctx);
222 len += xfrm_ctx->ctx_len;
227 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
229 memcpy(&x->id, &p->id, sizeof(x->id));
230 memcpy(&x->sel, &p->sel, sizeof(x->sel));
231 memcpy(&x->lft, &p->lft, sizeof(x->lft));
232 x->props.mode = p->mode;
233 x->props.replay_window = p->replay_window;
234 x->props.reqid = p->reqid;
235 x->props.family = p->family;
236 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
237 x->props.flags = p->flags;
240 * Set inner address family if the KM left it as zero.
241 * See comment in validate_tmpl.
244 x->sel.family = p->family;
248 * someday when pfkey also has support, we could have the code
249 * somehow made shareable and move it to xfrm_state.c - JHS
252 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
254 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
255 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
256 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
257 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
260 struct xfrm_replay_state *replay;
261 replay = nla_data(rp);
262 memcpy(&x->replay, replay, sizeof(*replay));
263 memcpy(&x->preplay, replay, sizeof(*replay));
267 struct xfrm_lifetime_cur *ltime;
268 ltime = nla_data(lt);
269 x->curlft.bytes = ltime->bytes;
270 x->curlft.packets = ltime->packets;
271 x->curlft.add_time = ltime->add_time;
272 x->curlft.use_time = ltime->use_time;
276 x->replay_maxage = nla_get_u32(et);
279 x->replay_maxdiff = nla_get_u32(rt);
282 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
283 struct nlattr **attrs,
286 struct xfrm_state *x = xfrm_state_alloc();
292 copy_from_user_state(x, p);
294 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
295 xfrm_aalg_get_byname,
296 attrs[XFRMA_ALG_AUTH])))
298 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
299 xfrm_ealg_get_byname,
300 attrs[XFRMA_ALG_CRYPT])))
302 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
303 xfrm_calg_get_byname,
304 attrs[XFRMA_ALG_COMP])))
307 if (attrs[XFRMA_ENCAP]) {
308 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
309 sizeof(*x->encap), GFP_KERNEL);
310 if (x->encap == NULL)
314 if (attrs[XFRMA_COADDR]) {
315 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
316 sizeof(*x->coaddr), GFP_KERNEL);
317 if (x->coaddr == NULL)
321 err = xfrm_init_state(x);
325 if (attrs[XFRMA_SEC_CTX] &&
326 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
330 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
331 /* sysctl_xfrm_aevent_etime is in 100ms units */
332 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
333 x->preplay.bitmap = 0;
334 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
335 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
337 /* override default values from above */
339 xfrm_update_ae_params(x, attrs);
344 x->km.state = XFRM_STATE_DEAD;
351 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
352 struct nlattr **attrs)
354 struct xfrm_usersa_info *p = nlmsg_data(nlh);
355 struct xfrm_state *x;
359 err = verify_newsa_info(p, attrs);
363 x = xfrm_state_construct(p, attrs, &err);
368 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
369 err = xfrm_state_add(x);
371 err = xfrm_state_update(x);
373 xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
374 NETLINK_CB(skb).sid);
377 x->km.state = XFRM_STATE_DEAD;
382 c.seq = nlh->nlmsg_seq;
383 c.pid = nlh->nlmsg_pid;
384 c.event = nlh->nlmsg_type;
386 km_state_notify(x, &c);
392 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
393 struct nlattr **attrs,
396 struct xfrm_state *x = NULL;
399 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
401 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
403 xfrm_address_t *saddr = NULL;
405 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
412 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
422 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
423 struct nlattr **attrs)
425 struct xfrm_state *x;
428 struct xfrm_usersa_id *p = nlmsg_data(nlh);
430 x = xfrm_user_state_lookup(p, attrs, &err);
434 if ((err = security_xfrm_state_delete(x)) != 0)
437 if (xfrm_state_kern(x)) {
442 err = xfrm_state_delete(x);
447 c.seq = nlh->nlmsg_seq;
448 c.pid = nlh->nlmsg_pid;
449 c.event = nlh->nlmsg_type;
450 km_state_notify(x, &c);
453 xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
454 NETLINK_CB(skb).sid);
459 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
461 memcpy(&p->id, &x->id, sizeof(p->id));
462 memcpy(&p->sel, &x->sel, sizeof(p->sel));
463 memcpy(&p->lft, &x->lft, sizeof(p->lft));
464 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
465 memcpy(&p->stats, &x->stats, sizeof(p->stats));
466 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
467 p->mode = x->props.mode;
468 p->replay_window = x->props.replay_window;
469 p->reqid = x->props.reqid;
470 p->family = x->props.family;
471 p->flags = x->props.flags;
475 struct xfrm_dump_info {
476 struct sk_buff *in_skb;
477 struct sk_buff *out_skb;
484 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
486 struct xfrm_user_sec_ctx *uctx;
488 int ctx_size = sizeof(*uctx) + s->ctx_len;
490 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
494 uctx = nla_data(attr);
495 uctx->exttype = XFRMA_SEC_CTX;
496 uctx->len = ctx_size;
497 uctx->ctx_doi = s->ctx_doi;
498 uctx->ctx_alg = s->ctx_alg;
499 uctx->ctx_len = s->ctx_len;
500 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
505 /* Don't change this without updating xfrm_sa_len! */
506 static int copy_to_user_state_extra(struct xfrm_state *x,
507 struct xfrm_usersa_info *p,
510 spin_lock_bh(&x->lock);
511 copy_to_user_state(x, p);
514 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
517 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
518 spin_unlock_bh(&x->lock);
521 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
523 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
525 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
528 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
530 if (x->security && copy_sec_ctx(x->security, skb) < 0)
531 goto nla_put_failure;
539 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
541 struct xfrm_dump_info *sp = ptr;
542 struct sk_buff *in_skb = sp->in_skb;
543 struct sk_buff *skb = sp->out_skb;
544 struct xfrm_usersa_info *p;
545 struct nlmsghdr *nlh;
548 if (sp->this_idx < sp->start_idx)
551 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
552 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
558 err = copy_to_user_state_extra(x, p, skb);
560 goto nla_put_failure;
568 nlmsg_cancel(skb, nlh);
572 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
574 struct xfrm_dump_info info;
576 info.in_skb = cb->skb;
578 info.nlmsg_seq = cb->nlh->nlmsg_seq;
579 info.nlmsg_flags = NLM_F_MULTI;
581 info.start_idx = cb->args[0];
582 (void) xfrm_state_walk(0, dump_one_state, &info);
583 cb->args[0] = info.this_idx;
588 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
589 struct xfrm_state *x, u32 seq)
591 struct xfrm_dump_info info;
594 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
596 return ERR_PTR(-ENOMEM);
598 info.in_skb = in_skb;
600 info.nlmsg_seq = seq;
601 info.nlmsg_flags = 0;
602 info.this_idx = info.start_idx = 0;
604 if (dump_one_state(x, 0, &info)) {
612 static inline size_t xfrm_spdinfo_msgsize(void)
614 return NLMSG_ALIGN(4)
615 + nla_total_size(sizeof(struct xfrmu_spdinfo))
616 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
619 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
621 struct xfrmk_spdinfo si;
622 struct xfrmu_spdinfo spc;
623 struct xfrmu_spdhinfo sph;
624 struct nlmsghdr *nlh;
627 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
628 if (nlh == NULL) /* shouldnt really happen ... */
633 xfrm_spd_getinfo(&si);
634 spc.incnt = si.incnt;
635 spc.outcnt = si.outcnt;
636 spc.fwdcnt = si.fwdcnt;
637 spc.inscnt = si.inscnt;
638 spc.outscnt = si.outscnt;
639 spc.fwdscnt = si.fwdscnt;
640 sph.spdhcnt = si.spdhcnt;
641 sph.spdhmcnt = si.spdhmcnt;
643 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
644 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
646 return nlmsg_end(skb, nlh);
649 nlmsg_cancel(skb, nlh);
653 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
654 struct nlattr **attrs)
656 struct sk_buff *r_skb;
657 u32 *flags = nlmsg_data(nlh);
658 u32 spid = NETLINK_CB(skb).pid;
659 u32 seq = nlh->nlmsg_seq;
661 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
665 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
668 return nlmsg_unicast(xfrm_nl, r_skb, spid);
671 static inline size_t xfrm_sadinfo_msgsize(void)
673 return NLMSG_ALIGN(4)
674 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
675 + nla_total_size(4); /* XFRMA_SAD_CNT */
678 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
680 struct xfrmk_sadinfo si;
681 struct xfrmu_sadhinfo sh;
682 struct nlmsghdr *nlh;
685 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
686 if (nlh == NULL) /* shouldnt really happen ... */
691 xfrm_sad_getinfo(&si);
693 sh.sadhmcnt = si.sadhmcnt;
694 sh.sadhcnt = si.sadhcnt;
696 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
697 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
699 return nlmsg_end(skb, nlh);
702 nlmsg_cancel(skb, nlh);
706 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
707 struct nlattr **attrs)
709 struct sk_buff *r_skb;
710 u32 *flags = nlmsg_data(nlh);
711 u32 spid = NETLINK_CB(skb).pid;
712 u32 seq = nlh->nlmsg_seq;
714 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
718 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
721 return nlmsg_unicast(xfrm_nl, r_skb, spid);
724 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
725 struct nlattr **attrs)
727 struct xfrm_usersa_id *p = nlmsg_data(nlh);
728 struct xfrm_state *x;
729 struct sk_buff *resp_skb;
732 x = xfrm_user_state_lookup(p, attrs, &err);
736 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
737 if (IS_ERR(resp_skb)) {
738 err = PTR_ERR(resp_skb);
740 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
747 static int verify_userspi_info(struct xfrm_userspi_info *p)
749 switch (p->info.id.proto) {
755 /* IPCOMP spi is 16-bits. */
756 if (p->max >= 0x10000)
770 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
771 struct nlattr **attrs)
773 struct xfrm_state *x;
774 struct xfrm_userspi_info *p;
775 struct sk_buff *resp_skb;
776 xfrm_address_t *daddr;
781 err = verify_userspi_info(p);
785 family = p->info.family;
786 daddr = &p->info.id.daddr;
790 x = xfrm_find_acq_byseq(p->info.seq);
791 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
798 x = xfrm_find_acq(p->info.mode, p->info.reqid,
799 p->info.id.proto, daddr,
806 err = xfrm_alloc_spi(x, p->min, p->max);
810 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
811 if (IS_ERR(resp_skb)) {
812 err = PTR_ERR(resp_skb);
816 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
824 static int verify_policy_dir(u8 dir)
828 case XFRM_POLICY_OUT:
829 case XFRM_POLICY_FWD:
839 static int verify_policy_type(u8 type)
842 case XFRM_POLICY_TYPE_MAIN:
843 #ifdef CONFIG_XFRM_SUB_POLICY
844 case XFRM_POLICY_TYPE_SUB:
855 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
859 case XFRM_SHARE_SESSION:
860 case XFRM_SHARE_USER:
861 case XFRM_SHARE_UNIQUE:
869 case XFRM_POLICY_ALLOW:
870 case XFRM_POLICY_BLOCK:
877 switch (p->sel.family) {
882 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
885 return -EAFNOSUPPORT;
892 return verify_policy_dir(p->dir);
895 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
897 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
898 struct xfrm_user_sec_ctx *uctx;
904 return security_xfrm_policy_alloc(pol, uctx);
907 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
913 for (i = 0; i < nr; i++, ut++) {
914 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
916 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
917 memcpy(&t->saddr, &ut->saddr,
918 sizeof(xfrm_address_t));
919 t->reqid = ut->reqid;
921 t->share = ut->share;
922 t->optional = ut->optional;
923 t->aalgos = ut->aalgos;
924 t->ealgos = ut->ealgos;
925 t->calgos = ut->calgos;
926 t->encap_family = ut->family;
930 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
934 if (nr > XFRM_MAX_DEPTH)
937 for (i = 0; i < nr; i++) {
938 /* We never validated the ut->family value, so many
939 * applications simply leave it at zero. The check was
940 * never made and ut->family was ignored because all
941 * templates could be assumed to have the same family as
942 * the policy itself. Now that we will have ipv4-in-ipv6
943 * and ipv6-in-ipv4 tunnels, this is no longer true.
946 ut[i].family = family;
948 switch (ut[i].family) {
951 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
963 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
965 struct nlattr *rt = attrs[XFRMA_TMPL];
970 struct xfrm_user_tmpl *utmpl = nla_data(rt);
971 int nr = nla_len(rt) / sizeof(*utmpl);
974 err = validate_tmpl(nr, utmpl, pol->family);
978 copy_templates(pol, utmpl, nr);
983 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
985 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
986 struct xfrm_userpolicy_type *upt;
987 u8 type = XFRM_POLICY_TYPE_MAIN;
995 err = verify_policy_type(type);
1003 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1005 xp->priority = p->priority;
1006 xp->index = p->index;
1007 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1008 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1009 xp->action = p->action;
1010 xp->flags = p->flags;
1011 xp->family = p->sel.family;
1012 /* XXX xp->share = p->share; */
1015 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1017 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1018 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1019 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1020 p->priority = xp->priority;
1021 p->index = xp->index;
1022 p->sel.family = xp->family;
1024 p->action = xp->action;
1025 p->flags = xp->flags;
1026 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1029 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1031 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1039 copy_from_user_policy(xp, p);
1041 err = copy_from_user_policy_type(&xp->type, attrs);
1045 if (!(err = copy_from_user_tmpl(xp, attrs)))
1046 err = copy_from_user_sec_ctx(xp, attrs);
1057 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1058 struct nlattr **attrs)
1060 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1061 struct xfrm_policy *xp;
1066 err = verify_newpolicy_info(p);
1069 err = verify_sec_ctx_len(attrs);
1073 xp = xfrm_policy_construct(p, attrs, &err);
1077 /* shouldnt excl be based on nlh flags??
1078 * Aha! this is anti-netlink really i.e more pfkey derived
1079 * in netlink excl is a flag and you wouldnt need
1080 * a type XFRM_MSG_UPDPOLICY - JHS */
1081 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1082 err = xfrm_policy_insert(p->dir, xp, excl);
1083 xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid,
1084 NETLINK_CB(skb).sid);
1087 security_xfrm_policy_free(xp);
1092 c.event = nlh->nlmsg_type;
1093 c.seq = nlh->nlmsg_seq;
1094 c.pid = nlh->nlmsg_pid;
1095 km_policy_notify(xp, p->dir, &c);
1102 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1104 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1107 if (xp->xfrm_nr == 0)
1110 for (i = 0; i < xp->xfrm_nr; i++) {
1111 struct xfrm_user_tmpl *up = &vec[i];
1112 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1114 memcpy(&up->id, &kp->id, sizeof(up->id));
1115 up->family = kp->encap_family;
1116 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1117 up->reqid = kp->reqid;
1118 up->mode = kp->mode;
1119 up->share = kp->share;
1120 up->optional = kp->optional;
1121 up->aalgos = kp->aalgos;
1122 up->ealgos = kp->ealgos;
1123 up->calgos = kp->calgos;
1126 return nla_put(skb, XFRMA_TMPL,
1127 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1130 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1133 return copy_sec_ctx(x->security, skb);
1138 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1141 return copy_sec_ctx(xp->security, skb);
1145 static inline size_t userpolicy_type_attrsize(void)
1147 #ifdef CONFIG_XFRM_SUB_POLICY
1148 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1154 #ifdef CONFIG_XFRM_SUB_POLICY
1155 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1157 struct xfrm_userpolicy_type upt = {
1161 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1165 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1171 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1173 struct xfrm_dump_info *sp = ptr;
1174 struct xfrm_userpolicy_info *p;
1175 struct sk_buff *in_skb = sp->in_skb;
1176 struct sk_buff *skb = sp->out_skb;
1177 struct nlmsghdr *nlh;
1179 if (sp->this_idx < sp->start_idx)
1182 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1183 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1187 p = nlmsg_data(nlh);
1188 copy_to_user_policy(xp, p, dir);
1189 if (copy_to_user_tmpl(xp, skb) < 0)
1191 if (copy_to_user_sec_ctx(xp, skb))
1193 if (copy_to_user_policy_type(xp->type, skb) < 0)
1196 nlmsg_end(skb, nlh);
1202 nlmsg_cancel(skb, nlh);
1206 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1208 struct xfrm_dump_info info;
1210 info.in_skb = cb->skb;
1212 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1213 info.nlmsg_flags = NLM_F_MULTI;
1215 info.start_idx = cb->args[0];
1216 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1217 #ifdef CONFIG_XFRM_SUB_POLICY
1218 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1220 cb->args[0] = info.this_idx;
1225 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1226 struct xfrm_policy *xp,
1229 struct xfrm_dump_info info;
1230 struct sk_buff *skb;
1232 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1234 return ERR_PTR(-ENOMEM);
1236 info.in_skb = in_skb;
1238 info.nlmsg_seq = seq;
1239 info.nlmsg_flags = 0;
1240 info.this_idx = info.start_idx = 0;
1242 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1250 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1251 struct nlattr **attrs)
1253 struct xfrm_policy *xp;
1254 struct xfrm_userpolicy_id *p;
1255 u8 type = XFRM_POLICY_TYPE_MAIN;
1260 p = nlmsg_data(nlh);
1261 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1263 err = copy_from_user_policy_type(&type, attrs);
1267 err = verify_policy_dir(p->dir);
1272 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1274 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1275 struct xfrm_policy tmp;
1277 err = verify_sec_ctx_len(attrs);
1281 memset(&tmp, 0, sizeof(struct xfrm_policy));
1283 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1285 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1288 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1290 security_xfrm_policy_free(&tmp);
1296 struct sk_buff *resp_skb;
1298 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1299 if (IS_ERR(resp_skb)) {
1300 err = PTR_ERR(resp_skb);
1302 err = nlmsg_unicast(xfrm_nl, resp_skb,
1303 NETLINK_CB(skb).pid);
1306 xfrm_audit_policy_delete(xp, err ? 0 : 1,
1307 NETLINK_CB(skb).loginuid,
1308 NETLINK_CB(skb).sid);
1313 c.data.byid = p->index;
1314 c.event = nlh->nlmsg_type;
1315 c.seq = nlh->nlmsg_seq;
1316 c.pid = nlh->nlmsg_pid;
1317 km_policy_notify(xp, p->dir, &c);
1325 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1326 struct nlattr **attrs)
1329 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1330 struct xfrm_audit audit_info;
1333 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1334 audit_info.secid = NETLINK_CB(skb).sid;
1335 err = xfrm_state_flush(p->proto, &audit_info);
1338 c.data.proto = p->proto;
1339 c.event = nlh->nlmsg_type;
1340 c.seq = nlh->nlmsg_seq;
1341 c.pid = nlh->nlmsg_pid;
1342 km_state_notify(NULL, &c);
1347 static inline size_t xfrm_aevent_msgsize(void)
1349 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1350 + nla_total_size(sizeof(struct xfrm_replay_state))
1351 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1352 + nla_total_size(4) /* XFRM_AE_RTHR */
1353 + nla_total_size(4); /* XFRM_AE_ETHR */
1356 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1358 struct xfrm_aevent_id *id;
1359 struct nlmsghdr *nlh;
1361 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1365 id = nlmsg_data(nlh);
1366 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1367 id->sa_id.spi = x->id.spi;
1368 id->sa_id.family = x->props.family;
1369 id->sa_id.proto = x->id.proto;
1370 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1371 id->reqid = x->props.reqid;
1372 id->flags = c->data.aevent;
1374 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1375 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1377 if (id->flags & XFRM_AE_RTHR)
1378 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1380 if (id->flags & XFRM_AE_ETHR)
1381 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1382 x->replay_maxage * 10 / HZ);
1384 return nlmsg_end(skb, nlh);
1387 nlmsg_cancel(skb, nlh);
1391 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1392 struct nlattr **attrs)
1394 struct xfrm_state *x;
1395 struct sk_buff *r_skb;
1398 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1399 struct xfrm_usersa_id *id = &p->sa_id;
1401 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1405 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1412 * XXX: is this lock really needed - none of the other
1413 * gets lock (the concern is things getting updated
1414 * while we are still reading) - jhs
1416 spin_lock_bh(&x->lock);
1417 c.data.aevent = p->flags;
1418 c.seq = nlh->nlmsg_seq;
1419 c.pid = nlh->nlmsg_pid;
1421 if (build_aevent(r_skb, x, &c) < 0)
1423 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1424 spin_unlock_bh(&x->lock);
1429 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1430 struct nlattr **attrs)
1432 struct xfrm_state *x;
1435 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1436 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1437 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1442 /* pedantic mode - thou shalt sayeth replaceth */
1443 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1446 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1450 if (x->km.state != XFRM_STATE_VALID)
1453 spin_lock_bh(&x->lock);
1454 xfrm_update_ae_params(x, attrs);
1455 spin_unlock_bh(&x->lock);
1457 c.event = nlh->nlmsg_type;
1458 c.seq = nlh->nlmsg_seq;
1459 c.pid = nlh->nlmsg_pid;
1460 c.data.aevent = XFRM_AE_CU;
1461 km_state_notify(x, &c);
1468 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1469 struct nlattr **attrs)
1472 u8 type = XFRM_POLICY_TYPE_MAIN;
1474 struct xfrm_audit audit_info;
1476 err = copy_from_user_policy_type(&type, attrs);
1480 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1481 audit_info.secid = NETLINK_CB(skb).sid;
1482 err = xfrm_policy_flush(type, &audit_info);
1486 c.event = nlh->nlmsg_type;
1487 c.seq = nlh->nlmsg_seq;
1488 c.pid = nlh->nlmsg_pid;
1489 km_policy_notify(NULL, 0, &c);
1493 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1494 struct nlattr **attrs)
1496 struct xfrm_policy *xp;
1497 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1498 struct xfrm_userpolicy_info *p = &up->pol;
1499 u8 type = XFRM_POLICY_TYPE_MAIN;
1502 err = copy_from_user_policy_type(&type, attrs);
1507 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1509 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1510 struct xfrm_policy tmp;
1512 err = verify_sec_ctx_len(attrs);
1516 memset(&tmp, 0, sizeof(struct xfrm_policy));
1518 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1520 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1523 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1525 security_xfrm_policy_free(&tmp);
1530 read_lock(&xp->lock);
1532 read_unlock(&xp->lock);
1536 read_unlock(&xp->lock);
1539 xfrm_policy_delete(xp, p->dir);
1540 xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid,
1541 NETLINK_CB(skb).sid);
1544 // reset the timers here?
1545 printk("Dont know what to do with soft policy expire\n");
1547 km_policy_expired(xp, p->dir, up->hard, current->pid);
1554 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1555 struct nlattr **attrs)
1557 struct xfrm_state *x;
1559 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1560 struct xfrm_usersa_info *p = &ue->state;
1562 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1568 spin_lock_bh(&x->lock);
1570 if (x->km.state != XFRM_STATE_VALID)
1572 km_state_expired(x, ue->hard, current->pid);
1575 __xfrm_state_delete(x);
1576 xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid,
1577 NETLINK_CB(skb).sid);
1581 spin_unlock_bh(&x->lock);
1586 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1587 struct nlattr **attrs)
1589 struct xfrm_policy *xp;
1590 struct xfrm_user_tmpl *ut;
1592 struct nlattr *rt = attrs[XFRMA_TMPL];
1594 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1595 struct xfrm_state *x = xfrm_state_alloc();
1601 err = verify_newpolicy_info(&ua->policy);
1603 printk("BAD policy passed\n");
1609 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
1615 memcpy(&x->id, &ua->id, sizeof(ua->id));
1616 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1617 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1620 /* extract the templates and for each call km_key */
1621 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1622 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1623 memcpy(&x->id, &t->id, sizeof(x->id));
1624 x->props.mode = t->mode;
1625 x->props.reqid = t->reqid;
1626 x->props.family = ut->family;
1627 t->aalgos = ua->aalgos;
1628 t->ealgos = ua->ealgos;
1629 t->calgos = ua->calgos;
1630 err = km_query(x, t, xp);
1640 #ifdef CONFIG_XFRM_MIGRATE
1641 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1642 struct nlattr **attrs, int *num)
1644 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1645 struct xfrm_user_migrate *um;
1649 num_migrate = nla_len(rt) / sizeof(*um);
1651 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1654 for (i = 0; i < num_migrate; i++, um++, ma++) {
1655 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1656 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1657 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1658 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1660 ma->proto = um->proto;
1661 ma->mode = um->mode;
1662 ma->reqid = um->reqid;
1664 ma->old_family = um->old_family;
1665 ma->new_family = um->new_family;
1672 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1673 struct nlattr **attrs)
1675 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1676 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1681 if (attrs[XFRMA_MIGRATE] == NULL)
1684 err = copy_from_user_policy_type(&type, attrs);
1688 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1696 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1701 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1702 struct nlattr **attrs)
1704 return -ENOPROTOOPT;
1708 #ifdef CONFIG_XFRM_MIGRATE
1709 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1711 struct xfrm_user_migrate um;
1713 memset(&um, 0, sizeof(um));
1714 um.proto = m->proto;
1716 um.reqid = m->reqid;
1717 um.old_family = m->old_family;
1718 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1719 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1720 um.new_family = m->new_family;
1721 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1722 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1724 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1727 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1729 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1730 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1731 + userpolicy_type_attrsize();
1734 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1735 int num_migrate, struct xfrm_selector *sel,
1738 struct xfrm_migrate *mp;
1739 struct xfrm_userpolicy_id *pol_id;
1740 struct nlmsghdr *nlh;
1743 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1747 pol_id = nlmsg_data(nlh);
1748 /* copy data from selector, dir, and type to the pol_id */
1749 memset(pol_id, 0, sizeof(*pol_id));
1750 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1753 if (copy_to_user_policy_type(type, skb) < 0)
1756 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1757 if (copy_to_user_migrate(mp, skb) < 0)
1761 return nlmsg_end(skb, nlh);
1763 nlmsg_cancel(skb, nlh);
1767 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1768 struct xfrm_migrate *m, int num_migrate)
1770 struct sk_buff *skb;
1772 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1777 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1780 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1783 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1784 struct xfrm_migrate *m, int num_migrate)
1786 return -ENOPROTOOPT;
1790 #define XMSGSIZE(type) sizeof(struct type)
1792 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1793 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1794 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1795 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1796 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1797 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1798 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1799 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1800 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1801 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1802 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1803 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1804 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1805 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1806 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1807 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1808 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1809 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1810 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1811 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1812 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1817 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1818 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1819 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1820 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1821 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1822 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1823 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1824 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1825 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1826 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1827 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1828 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1829 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1830 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1831 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1834 static struct xfrm_link {
1835 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1836 int (*dump)(struct sk_buff *, struct netlink_callback *);
1837 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1838 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1839 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1840 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1841 .dump = xfrm_dump_sa },
1842 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1843 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1844 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1845 .dump = xfrm_dump_policy },
1846 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1847 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1848 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1849 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1850 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1851 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1852 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1853 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1854 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1855 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1856 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1857 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1858 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1861 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1863 struct nlattr *attrs[XFRMA_MAX+1];
1864 struct xfrm_link *link;
1867 type = nlh->nlmsg_type;
1868 if (type > XFRM_MSG_MAX)
1871 type -= XFRM_MSG_BASE;
1872 link = &xfrm_dispatch[type];
1874 /* All operations require privileges, even GET */
1875 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1878 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1879 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1880 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1881 if (link->dump == NULL)
1884 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1887 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
1892 if (link->doit == NULL)
1895 return link->doit(skb, nlh, attrs);
1898 static void xfrm_netlink_rcv(struct sk_buff *skb)
1900 mutex_lock(&xfrm_cfg_mutex);
1901 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
1902 mutex_unlock(&xfrm_cfg_mutex);
1905 static inline size_t xfrm_expire_msgsize(void)
1907 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1910 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1912 struct xfrm_user_expire *ue;
1913 struct nlmsghdr *nlh;
1915 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1919 ue = nlmsg_data(nlh);
1920 copy_to_user_state(x, &ue->state);
1921 ue->hard = (c->data.hard != 0) ? 1 : 0;
1923 return nlmsg_end(skb, nlh);
1926 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1928 struct sk_buff *skb;
1930 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1934 if (build_expire(skb, x, c) < 0)
1937 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1940 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1942 struct sk_buff *skb;
1944 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1948 if (build_aevent(skb, x, c) < 0)
1951 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1954 static int xfrm_notify_sa_flush(struct km_event *c)
1956 struct xfrm_usersa_flush *p;
1957 struct nlmsghdr *nlh;
1958 struct sk_buff *skb;
1959 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
1961 skb = nlmsg_new(len, GFP_ATOMIC);
1965 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
1971 p = nlmsg_data(nlh);
1972 p->proto = c->data.proto;
1974 nlmsg_end(skb, nlh);
1976 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1979 static inline size_t xfrm_sa_len(struct xfrm_state *x)
1983 l += nla_total_size(alg_len(x->aalg));
1985 l += nla_total_size(alg_len(x->ealg));
1987 l += nla_total_size(sizeof(*x->calg));
1989 l += nla_total_size(sizeof(*x->encap));
1991 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
1992 x->security->ctx_len);
1994 l += nla_total_size(sizeof(*x->coaddr));
1996 /* Must count this as this may become non-zero behind our back. */
1997 l += nla_total_size(sizeof(x->lastused));
2002 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2004 struct xfrm_usersa_info *p;
2005 struct xfrm_usersa_id *id;
2006 struct nlmsghdr *nlh;
2007 struct sk_buff *skb;
2008 int len = xfrm_sa_len(x);
2011 headlen = sizeof(*p);
2012 if (c->event == XFRM_MSG_DELSA) {
2013 len += nla_total_size(headlen);
2014 headlen = sizeof(*id);
2016 len += NLMSG_ALIGN(headlen);
2018 skb = nlmsg_new(len, GFP_ATOMIC);
2022 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2024 goto nla_put_failure;
2026 p = nlmsg_data(nlh);
2027 if (c->event == XFRM_MSG_DELSA) {
2028 struct nlattr *attr;
2030 id = nlmsg_data(nlh);
2031 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2032 id->spi = x->id.spi;
2033 id->family = x->props.family;
2034 id->proto = x->id.proto;
2036 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2038 goto nla_put_failure;
2043 if (copy_to_user_state_extra(x, p, skb))
2044 goto nla_put_failure;
2046 nlmsg_end(skb, nlh);
2048 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2051 /* Somebody screwed up with xfrm_sa_len! */
2057 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2061 case XFRM_MSG_EXPIRE:
2062 return xfrm_exp_state_notify(x, c);
2063 case XFRM_MSG_NEWAE:
2064 return xfrm_aevent_state_notify(x, c);
2065 case XFRM_MSG_DELSA:
2066 case XFRM_MSG_UPDSA:
2067 case XFRM_MSG_NEWSA:
2068 return xfrm_notify_sa(x, c);
2069 case XFRM_MSG_FLUSHSA:
2070 return xfrm_notify_sa_flush(c);
2072 printk("xfrm_user: Unknown SA event %d\n", c->event);
2080 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2081 struct xfrm_policy *xp)
2083 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2084 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2085 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2086 + userpolicy_type_attrsize();
2089 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2090 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2093 struct xfrm_user_acquire *ua;
2094 struct nlmsghdr *nlh;
2095 __u32 seq = xfrm_get_acqseq();
2097 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2101 ua = nlmsg_data(nlh);
2102 memcpy(&ua->id, &x->id, sizeof(ua->id));
2103 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2104 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2105 copy_to_user_policy(xp, &ua->policy, dir);
2106 ua->aalgos = xt->aalgos;
2107 ua->ealgos = xt->ealgos;
2108 ua->calgos = xt->calgos;
2109 ua->seq = x->km.seq = seq;
2111 if (copy_to_user_tmpl(xp, skb) < 0)
2113 if (copy_to_user_state_sec_ctx(x, skb))
2115 if (copy_to_user_policy_type(xp->type, skb) < 0)
2118 return nlmsg_end(skb, nlh);
2121 nlmsg_cancel(skb, nlh);
2125 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2126 struct xfrm_policy *xp, int dir)
2128 struct sk_buff *skb;
2130 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2134 if (build_acquire(skb, x, xt, xp, dir) < 0)
2137 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2140 /* User gives us xfrm_user_policy_info followed by an array of 0
2141 * or more templates.
2143 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2144 u8 *data, int len, int *dir)
2146 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2147 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2148 struct xfrm_policy *xp;
2151 switch (sk->sk_family) {
2153 if (opt != IP_XFRM_POLICY) {
2158 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2160 if (opt != IPV6_XFRM_POLICY) {
2173 if (len < sizeof(*p) ||
2174 verify_newpolicy_info(p))
2177 nr = ((len - sizeof(*p)) / sizeof(*ut));
2178 if (validate_tmpl(nr, ut, p->sel.family))
2181 if (p->dir > XFRM_POLICY_OUT)
2184 xp = xfrm_policy_alloc(GFP_KERNEL);
2190 copy_from_user_policy(xp, p);
2191 xp->type = XFRM_POLICY_TYPE_MAIN;
2192 copy_templates(xp, ut, nr);
2199 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2201 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2202 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2203 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2204 + userpolicy_type_attrsize();
2207 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2208 int dir, struct km_event *c)
2210 struct xfrm_user_polexpire *upe;
2211 struct nlmsghdr *nlh;
2212 int hard = c->data.hard;
2214 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2218 upe = nlmsg_data(nlh);
2219 copy_to_user_policy(xp, &upe->pol, dir);
2220 if (copy_to_user_tmpl(xp, skb) < 0)
2222 if (copy_to_user_sec_ctx(xp, skb))
2224 if (copy_to_user_policy_type(xp->type, skb) < 0)
2228 return nlmsg_end(skb, nlh);
2231 nlmsg_cancel(skb, nlh);
2235 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2237 struct sk_buff *skb;
2239 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2243 if (build_polexpire(skb, xp, dir, c) < 0)
2246 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2249 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2251 struct xfrm_userpolicy_info *p;
2252 struct xfrm_userpolicy_id *id;
2253 struct nlmsghdr *nlh;
2254 struct sk_buff *skb;
2255 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2258 headlen = sizeof(*p);
2259 if (c->event == XFRM_MSG_DELPOLICY) {
2260 len += nla_total_size(headlen);
2261 headlen = sizeof(*id);
2263 len += userpolicy_type_attrsize();
2264 len += NLMSG_ALIGN(headlen);
2266 skb = nlmsg_new(len, GFP_ATOMIC);
2270 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2274 p = nlmsg_data(nlh);
2275 if (c->event == XFRM_MSG_DELPOLICY) {
2276 struct nlattr *attr;
2278 id = nlmsg_data(nlh);
2279 memset(id, 0, sizeof(*id));
2282 id->index = xp->index;
2284 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2286 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2293 copy_to_user_policy(xp, p, dir);
2294 if (copy_to_user_tmpl(xp, skb) < 0)
2296 if (copy_to_user_policy_type(xp->type, skb) < 0)
2299 nlmsg_end(skb, nlh);
2301 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2308 static int xfrm_notify_policy_flush(struct km_event *c)
2310 struct nlmsghdr *nlh;
2311 struct sk_buff *skb;
2313 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2317 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2320 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2323 nlmsg_end(skb, nlh);
2325 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2332 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2336 case XFRM_MSG_NEWPOLICY:
2337 case XFRM_MSG_UPDPOLICY:
2338 case XFRM_MSG_DELPOLICY:
2339 return xfrm_notify_policy(xp, dir, c);
2340 case XFRM_MSG_FLUSHPOLICY:
2341 return xfrm_notify_policy_flush(c);
2342 case XFRM_MSG_POLEXPIRE:
2343 return xfrm_exp_policy_notify(xp, dir, c);
2345 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2352 static inline size_t xfrm_report_msgsize(void)
2354 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2357 static int build_report(struct sk_buff *skb, u8 proto,
2358 struct xfrm_selector *sel, xfrm_address_t *addr)
2360 struct xfrm_user_report *ur;
2361 struct nlmsghdr *nlh;
2363 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2367 ur = nlmsg_data(nlh);
2369 memcpy(&ur->sel, sel, sizeof(ur->sel));
2372 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2374 return nlmsg_end(skb, nlh);
2377 nlmsg_cancel(skb, nlh);
2381 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2382 xfrm_address_t *addr)
2384 struct sk_buff *skb;
2386 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2390 if (build_report(skb, proto, sel, addr) < 0)
2393 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2396 static struct xfrm_mgr netlink_mgr = {
2398 .notify = xfrm_send_state_notify,
2399 .acquire = xfrm_send_acquire,
2400 .compile_policy = xfrm_compile_policy,
2401 .notify_policy = xfrm_send_policy_notify,
2402 .report = xfrm_send_report,
2403 .migrate = xfrm_send_migrate,
2406 static int __init xfrm_user_init(void)
2410 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2412 nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,
2413 xfrm_netlink_rcv, NULL, THIS_MODULE);
2416 rcu_assign_pointer(xfrm_nl, nlsk);
2418 xfrm_register_km(&netlink_mgr);
2423 static void __exit xfrm_user_exit(void)
2425 struct sock *nlsk = xfrm_nl;
2427 xfrm_unregister_km(&netlink_mgr);
2428 rcu_assign_pointer(xfrm_nl, NULL);
2430 sock_release(nlsk->sk_socket);
2433 module_init(xfrm_user_init);
2434 module_exit(xfrm_user_exit);
2435 MODULE_LICENSE("GPL");
2436 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);