1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
30 #include <asm/uaccess.h>
31 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32 #include <linux/in6.h>
34 #include <linux/audit.h>
36 static inline int alg_len(struct xfrm_algo *alg)
38 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
41 static int verify_one_alg(struct rtattr **attrs, enum xfrm_attr_type_t type)
43 struct rtattr *rt = attrs[type];
44 struct xfrm_algo *algp;
50 if (RTA_PAYLOAD(rt) < alg_len(algp))
55 if (!algp->alg_key_len &&
56 strcmp(algp->alg_name, "digest_null") != 0)
61 if (!algp->alg_key_len &&
62 strcmp(algp->alg_name, "cipher_null") != 0)
67 /* Zero length keys are legal. */
74 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
78 static void verify_one_addr(struct rtattr **attrs, enum xfrm_attr_type_t type,
79 xfrm_address_t **addrp)
81 struct rtattr *rt = attrs[type];
84 *addrp = RTA_DATA(rt);
87 static inline int verify_sec_ctx_len(struct rtattr **attrs)
89 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
90 struct xfrm_user_sec_ctx *uctx;
96 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
103 static int verify_newsa_info(struct xfrm_usersa_info *p,
104 struct rtattr **attrs)
114 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
126 switch (p->id.proto) {
128 if (!attrs[XFRMA_ALG_AUTH] ||
129 attrs[XFRMA_ALG_CRYPT] ||
130 attrs[XFRMA_ALG_COMP])
135 if ((!attrs[XFRMA_ALG_AUTH] &&
136 !attrs[XFRMA_ALG_CRYPT]) ||
137 attrs[XFRMA_ALG_COMP])
142 if (!attrs[XFRMA_ALG_COMP] ||
143 attrs[XFRMA_ALG_AUTH] ||
144 attrs[XFRMA_ALG_CRYPT])
148 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
149 case IPPROTO_DSTOPTS:
150 case IPPROTO_ROUTING:
151 if (attrs[XFRMA_ALG_COMP] ||
152 attrs[XFRMA_ALG_AUTH] ||
153 attrs[XFRMA_ALG_CRYPT] ||
154 attrs[XFRMA_ENCAP] ||
155 attrs[XFRMA_SEC_CTX] ||
156 !attrs[XFRMA_COADDR])
165 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
167 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
169 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
171 if ((err = verify_sec_ctx_len(attrs)))
176 case XFRM_MODE_TRANSPORT:
177 case XFRM_MODE_TUNNEL:
178 case XFRM_MODE_ROUTEOPTIMIZATION:
192 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
193 struct xfrm_algo_desc *(*get_byname)(char *, int),
194 struct rtattr *u_arg)
196 struct rtattr *rta = u_arg;
197 struct xfrm_algo *p, *ualg;
198 struct xfrm_algo_desc *algo;
203 ualg = RTA_DATA(rta);
205 algo = get_byname(ualg->alg_name, 1);
208 *props = algo->desc.sadb_alg_id;
210 p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
214 strcpy(p->alg_name, algo->name);
219 static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
221 struct rtattr *rta = u_arg;
222 struct xfrm_encap_tmpl *p, *uencap;
227 uencap = RTA_DATA(rta);
228 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
237 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
242 len += sizeof(struct xfrm_user_sec_ctx);
243 len += xfrm_ctx->ctx_len;
248 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
250 struct xfrm_user_sec_ctx *uctx;
255 uctx = RTA_DATA(u_arg);
256 return security_xfrm_state_alloc(x, uctx);
259 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
261 struct rtattr *rta = u_arg;
262 xfrm_address_t *p, *uaddrp;
267 uaddrp = RTA_DATA(rta);
268 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
276 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
278 memcpy(&x->id, &p->id, sizeof(x->id));
279 memcpy(&x->sel, &p->sel, sizeof(x->sel));
280 memcpy(&x->lft, &p->lft, sizeof(x->lft));
281 x->props.mode = p->mode;
282 x->props.replay_window = p->replay_window;
283 x->props.reqid = p->reqid;
284 x->props.family = p->family;
285 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
286 x->props.flags = p->flags;
289 * Set inner address family if the KM left it as zero.
290 * See comment in validate_tmpl.
293 x->sel.family = p->family;
297 * someday when pfkey also has support, we could have the code
298 * somehow made shareable and move it to xfrm_state.c - JHS
301 static void xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **attrs)
303 struct rtattr *rp = attrs[XFRMA_REPLAY_VAL];
304 struct rtattr *lt = attrs[XFRMA_LTIME_VAL];
305 struct rtattr *et = attrs[XFRMA_ETIMER_THRESH];
306 struct rtattr *rt = attrs[XFRMA_REPLAY_THRESH];
309 struct xfrm_replay_state *replay;
310 replay = RTA_DATA(rp);
311 memcpy(&x->replay, replay, sizeof(*replay));
312 memcpy(&x->preplay, replay, sizeof(*replay));
316 struct xfrm_lifetime_cur *ltime;
317 ltime = RTA_DATA(lt);
318 x->curlft.bytes = ltime->bytes;
319 x->curlft.packets = ltime->packets;
320 x->curlft.add_time = ltime->add_time;
321 x->curlft.use_time = ltime->use_time;
325 x->replay_maxage = *(u32*)RTA_DATA(et);
328 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
331 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
332 struct rtattr **attrs,
335 struct xfrm_state *x = xfrm_state_alloc();
341 copy_from_user_state(x, p);
343 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
344 xfrm_aalg_get_byname,
345 attrs[XFRMA_ALG_AUTH])))
347 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
348 xfrm_ealg_get_byname,
349 attrs[XFRMA_ALG_CRYPT])))
351 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
352 xfrm_calg_get_byname,
353 attrs[XFRMA_ALG_COMP])))
355 if ((err = attach_encap_tmpl(&x->encap, attrs[XFRMA_ENCAP])))
357 if ((err = attach_one_addr(&x->coaddr, attrs[XFRMA_COADDR])))
359 err = xfrm_init_state(x);
363 if ((err = attach_sec_ctx(x, attrs[XFRMA_SEC_CTX])))
367 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
368 /* sysctl_xfrm_aevent_etime is in 100ms units */
369 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
370 x->preplay.bitmap = 0;
371 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
372 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
374 /* override default values from above */
376 xfrm_update_ae_params(x, (struct rtattr **)attrs);
381 x->km.state = XFRM_STATE_DEAD;
388 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
389 struct rtattr **attrs)
391 struct xfrm_usersa_info *p = nlmsg_data(nlh);
392 struct xfrm_state *x;
396 err = verify_newsa_info(p, attrs);
400 x = xfrm_state_construct(p, attrs, &err);
405 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
406 err = xfrm_state_add(x);
408 err = xfrm_state_update(x);
410 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
411 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
414 x->km.state = XFRM_STATE_DEAD;
419 c.seq = nlh->nlmsg_seq;
420 c.pid = nlh->nlmsg_pid;
421 c.event = nlh->nlmsg_type;
423 km_state_notify(x, &c);
429 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
430 struct rtattr **attrs,
433 struct xfrm_state *x = NULL;
436 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
438 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
440 xfrm_address_t *saddr = NULL;
442 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
449 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
459 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
460 struct rtattr **attrs)
462 struct xfrm_state *x;
465 struct xfrm_usersa_id *p = nlmsg_data(nlh);
467 x = xfrm_user_state_lookup(p, attrs, &err);
471 if ((err = security_xfrm_state_delete(x)) != 0)
474 if (xfrm_state_kern(x)) {
479 err = xfrm_state_delete(x);
484 c.seq = nlh->nlmsg_seq;
485 c.pid = nlh->nlmsg_pid;
486 c.event = nlh->nlmsg_type;
487 km_state_notify(x, &c);
490 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
491 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
496 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
498 memcpy(&p->id, &x->id, sizeof(p->id));
499 memcpy(&p->sel, &x->sel, sizeof(p->sel));
500 memcpy(&p->lft, &x->lft, sizeof(p->lft));
501 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
502 memcpy(&p->stats, &x->stats, sizeof(p->stats));
503 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
504 p->mode = x->props.mode;
505 p->replay_window = x->props.replay_window;
506 p->reqid = x->props.reqid;
507 p->family = x->props.family;
508 p->flags = x->props.flags;
512 struct xfrm_dump_info {
513 struct sk_buff *in_skb;
514 struct sk_buff *out_skb;
521 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
523 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
524 struct xfrm_user_sec_ctx *uctx;
527 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
531 uctx = nla_data(attr);
532 uctx->exttype = XFRMA_SEC_CTX;
533 uctx->len = ctx_size;
534 uctx->ctx_doi = s->ctx_doi;
535 uctx->ctx_alg = s->ctx_alg;
536 uctx->ctx_len = s->ctx_len;
537 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
542 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
544 struct xfrm_dump_info *sp = ptr;
545 struct sk_buff *in_skb = sp->in_skb;
546 struct sk_buff *skb = sp->out_skb;
547 struct xfrm_usersa_info *p;
548 struct nlmsghdr *nlh;
550 if (sp->this_idx < sp->start_idx)
553 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
554 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
559 copy_to_user_state(x, p);
562 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
564 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
566 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
569 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
571 if (x->security && copy_sec_ctx(x->security, skb) < 0)
572 goto nla_put_failure;
575 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
578 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
586 nlmsg_cancel(skb, nlh);
590 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
592 struct xfrm_dump_info info;
594 info.in_skb = cb->skb;
596 info.nlmsg_seq = cb->nlh->nlmsg_seq;
597 info.nlmsg_flags = NLM_F_MULTI;
599 info.start_idx = cb->args[0];
600 (void) xfrm_state_walk(0, dump_one_state, &info);
601 cb->args[0] = info.this_idx;
606 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
607 struct xfrm_state *x, u32 seq)
609 struct xfrm_dump_info info;
612 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
614 return ERR_PTR(-ENOMEM);
616 info.in_skb = in_skb;
618 info.nlmsg_seq = seq;
619 info.nlmsg_flags = 0;
620 info.this_idx = info.start_idx = 0;
622 if (dump_one_state(x, 0, &info)) {
630 static inline size_t xfrm_spdinfo_msgsize(void)
632 return NLMSG_ALIGN(4)
633 + nla_total_size(sizeof(struct xfrmu_spdinfo))
634 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
637 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
639 struct xfrmk_spdinfo si;
640 struct xfrmu_spdinfo spc;
641 struct xfrmu_spdhinfo sph;
642 struct nlmsghdr *nlh;
645 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
646 if (nlh == NULL) /* shouldnt really happen ... */
651 xfrm_spd_getinfo(&si);
652 spc.incnt = si.incnt;
653 spc.outcnt = si.outcnt;
654 spc.fwdcnt = si.fwdcnt;
655 spc.inscnt = si.inscnt;
656 spc.outscnt = si.outscnt;
657 spc.fwdscnt = si.fwdscnt;
658 sph.spdhcnt = si.spdhcnt;
659 sph.spdhmcnt = si.spdhmcnt;
661 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
662 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
664 return nlmsg_end(skb, nlh);
667 nlmsg_cancel(skb, nlh);
671 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
672 struct rtattr **attrs)
674 struct sk_buff *r_skb;
675 u32 *flags = nlmsg_data(nlh);
676 u32 spid = NETLINK_CB(skb).pid;
677 u32 seq = nlh->nlmsg_seq;
679 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
683 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
686 return nlmsg_unicast(xfrm_nl, r_skb, spid);
689 static inline size_t xfrm_sadinfo_msgsize(void)
691 return NLMSG_ALIGN(4)
692 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
693 + nla_total_size(4); /* XFRMA_SAD_CNT */
696 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
698 struct xfrmk_sadinfo si;
699 struct xfrmu_sadhinfo sh;
700 struct nlmsghdr *nlh;
703 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
704 if (nlh == NULL) /* shouldnt really happen ... */
709 xfrm_sad_getinfo(&si);
711 sh.sadhmcnt = si.sadhmcnt;
712 sh.sadhcnt = si.sadhcnt;
714 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
715 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
717 return nlmsg_end(skb, nlh);
720 nlmsg_cancel(skb, nlh);
724 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
725 struct rtattr **attrs)
727 struct sk_buff *r_skb;
728 u32 *flags = nlmsg_data(nlh);
729 u32 spid = NETLINK_CB(skb).pid;
730 u32 seq = nlh->nlmsg_seq;
732 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
736 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
739 return nlmsg_unicast(xfrm_nl, r_skb, spid);
742 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
743 struct rtattr **attrs)
745 struct xfrm_usersa_id *p = nlmsg_data(nlh);
746 struct xfrm_state *x;
747 struct sk_buff *resp_skb;
750 x = xfrm_user_state_lookup(p, attrs, &err);
754 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
755 if (IS_ERR(resp_skb)) {
756 err = PTR_ERR(resp_skb);
758 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
765 static int verify_userspi_info(struct xfrm_userspi_info *p)
767 switch (p->info.id.proto) {
773 /* IPCOMP spi is 16-bits. */
774 if (p->max >= 0x10000)
788 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
789 struct rtattr **attrs)
791 struct xfrm_state *x;
792 struct xfrm_userspi_info *p;
793 struct sk_buff *resp_skb;
794 xfrm_address_t *daddr;
799 err = verify_userspi_info(p);
803 family = p->info.family;
804 daddr = &p->info.id.daddr;
808 x = xfrm_find_acq_byseq(p->info.seq);
809 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
816 x = xfrm_find_acq(p->info.mode, p->info.reqid,
817 p->info.id.proto, daddr,
824 resp_skb = ERR_PTR(-ENOENT);
826 spin_lock_bh(&x->lock);
827 if (x->km.state != XFRM_STATE_DEAD) {
828 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
830 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
832 spin_unlock_bh(&x->lock);
834 if (IS_ERR(resp_skb)) {
835 err = PTR_ERR(resp_skb);
839 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
847 static int verify_policy_dir(u8 dir)
851 case XFRM_POLICY_OUT:
852 case XFRM_POLICY_FWD:
862 static int verify_policy_type(u8 type)
865 case XFRM_POLICY_TYPE_MAIN:
866 #ifdef CONFIG_XFRM_SUB_POLICY
867 case XFRM_POLICY_TYPE_SUB:
878 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
882 case XFRM_SHARE_SESSION:
883 case XFRM_SHARE_USER:
884 case XFRM_SHARE_UNIQUE:
892 case XFRM_POLICY_ALLOW:
893 case XFRM_POLICY_BLOCK:
900 switch (p->sel.family) {
905 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
908 return -EAFNOSUPPORT;
915 return verify_policy_dir(p->dir);
918 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **attrs)
920 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
921 struct xfrm_user_sec_ctx *uctx;
927 return security_xfrm_policy_alloc(pol, uctx);
930 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
936 for (i = 0; i < nr; i++, ut++) {
937 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
939 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
940 memcpy(&t->saddr, &ut->saddr,
941 sizeof(xfrm_address_t));
942 t->reqid = ut->reqid;
944 t->share = ut->share;
945 t->optional = ut->optional;
946 t->aalgos = ut->aalgos;
947 t->ealgos = ut->ealgos;
948 t->calgos = ut->calgos;
949 t->encap_family = ut->family;
953 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
957 if (nr > XFRM_MAX_DEPTH)
960 for (i = 0; i < nr; i++) {
961 /* We never validated the ut->family value, so many
962 * applications simply leave it at zero. The check was
963 * never made and ut->family was ignored because all
964 * templates could be assumed to have the same family as
965 * the policy itself. Now that we will have ipv4-in-ipv6
966 * and ipv6-in-ipv4 tunnels, this is no longer true.
969 ut[i].family = family;
971 switch (ut[i].family) {
974 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
986 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **attrs)
988 struct rtattr *rt = attrs[XFRMA_TMPL];
993 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
994 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
997 err = validate_tmpl(nr, utmpl, pol->family);
1001 copy_templates(pol, RTA_DATA(rt), nr);
1006 static int copy_from_user_policy_type(u8 *tp, struct rtattr **attrs)
1008 struct rtattr *rt = attrs[XFRMA_POLICY_TYPE];
1009 struct xfrm_userpolicy_type *upt;
1010 u8 type = XFRM_POLICY_TYPE_MAIN;
1018 err = verify_policy_type(type);
1026 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1028 xp->priority = p->priority;
1029 xp->index = p->index;
1030 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1031 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1032 xp->action = p->action;
1033 xp->flags = p->flags;
1034 xp->family = p->sel.family;
1035 /* XXX xp->share = p->share; */
1038 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1040 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1041 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1042 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1043 p->priority = xp->priority;
1044 p->index = xp->index;
1045 p->sel.family = xp->family;
1047 p->action = xp->action;
1048 p->flags = xp->flags;
1049 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1052 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **attrs, int *errp)
1054 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1062 copy_from_user_policy(xp, p);
1064 err = copy_from_user_policy_type(&xp->type, attrs);
1068 if (!(err = copy_from_user_tmpl(xp, attrs)))
1069 err = copy_from_user_sec_ctx(xp, attrs);
1080 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1081 struct rtattr **attrs)
1083 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1084 struct xfrm_policy *xp;
1089 err = verify_newpolicy_info(p);
1092 err = verify_sec_ctx_len(attrs);
1096 xp = xfrm_policy_construct(p, attrs, &err);
1100 /* shouldnt excl be based on nlh flags??
1101 * Aha! this is anti-netlink really i.e more pfkey derived
1102 * in netlink excl is a flag and you wouldnt need
1103 * a type XFRM_MSG_UPDPOLICY - JHS */
1104 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1105 err = xfrm_policy_insert(p->dir, xp, excl);
1106 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1107 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1110 security_xfrm_policy_free(xp);
1115 c.event = nlh->nlmsg_type;
1116 c.seq = nlh->nlmsg_seq;
1117 c.pid = nlh->nlmsg_pid;
1118 km_policy_notify(xp, p->dir, &c);
1125 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1127 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1130 if (xp->xfrm_nr == 0)
1133 for (i = 0; i < xp->xfrm_nr; i++) {
1134 struct xfrm_user_tmpl *up = &vec[i];
1135 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1137 memcpy(&up->id, &kp->id, sizeof(up->id));
1138 up->family = kp->encap_family;
1139 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1140 up->reqid = kp->reqid;
1141 up->mode = kp->mode;
1142 up->share = kp->share;
1143 up->optional = kp->optional;
1144 up->aalgos = kp->aalgos;
1145 up->ealgos = kp->ealgos;
1146 up->calgos = kp->calgos;
1149 return nla_put(skb, XFRMA_TMPL,
1150 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1153 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1156 return copy_sec_ctx(x->security, skb);
1161 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1164 return copy_sec_ctx(xp->security, skb);
1168 static inline size_t userpolicy_type_attrsize(void)
1170 #ifdef CONFIG_XFRM_SUB_POLICY
1171 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1177 #ifdef CONFIG_XFRM_SUB_POLICY
1178 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1180 struct xfrm_userpolicy_type upt = {
1184 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1188 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1194 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1196 struct xfrm_dump_info *sp = ptr;
1197 struct xfrm_userpolicy_info *p;
1198 struct sk_buff *in_skb = sp->in_skb;
1199 struct sk_buff *skb = sp->out_skb;
1200 struct nlmsghdr *nlh;
1202 if (sp->this_idx < sp->start_idx)
1205 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1206 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1210 p = nlmsg_data(nlh);
1211 copy_to_user_policy(xp, p, dir);
1212 if (copy_to_user_tmpl(xp, skb) < 0)
1214 if (copy_to_user_sec_ctx(xp, skb))
1216 if (copy_to_user_policy_type(xp->type, skb) < 0)
1219 nlmsg_end(skb, nlh);
1225 nlmsg_cancel(skb, nlh);
1229 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1231 struct xfrm_dump_info info;
1233 info.in_skb = cb->skb;
1235 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1236 info.nlmsg_flags = NLM_F_MULTI;
1238 info.start_idx = cb->args[0];
1239 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1240 #ifdef CONFIG_XFRM_SUB_POLICY
1241 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1243 cb->args[0] = info.this_idx;
1248 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1249 struct xfrm_policy *xp,
1252 struct xfrm_dump_info info;
1253 struct sk_buff *skb;
1255 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1257 return ERR_PTR(-ENOMEM);
1259 info.in_skb = in_skb;
1261 info.nlmsg_seq = seq;
1262 info.nlmsg_flags = 0;
1263 info.this_idx = info.start_idx = 0;
1265 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1273 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1274 struct rtattr **attrs)
1276 struct xfrm_policy *xp;
1277 struct xfrm_userpolicy_id *p;
1278 u8 type = XFRM_POLICY_TYPE_MAIN;
1283 p = nlmsg_data(nlh);
1284 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1286 err = copy_from_user_policy_type(&type, attrs);
1290 err = verify_policy_dir(p->dir);
1295 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1297 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
1298 struct xfrm_policy tmp;
1300 err = verify_sec_ctx_len(attrs);
1304 memset(&tmp, 0, sizeof(struct xfrm_policy));
1306 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1308 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1311 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1313 security_xfrm_policy_free(&tmp);
1319 struct sk_buff *resp_skb;
1321 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1322 if (IS_ERR(resp_skb)) {
1323 err = PTR_ERR(resp_skb);
1325 err = nlmsg_unicast(xfrm_nl, resp_skb,
1326 NETLINK_CB(skb).pid);
1329 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1330 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1335 c.data.byid = p->index;
1336 c.event = nlh->nlmsg_type;
1337 c.seq = nlh->nlmsg_seq;
1338 c.pid = nlh->nlmsg_pid;
1339 km_policy_notify(xp, p->dir, &c);
1347 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1348 struct rtattr **attrs)
1351 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1352 struct xfrm_audit audit_info;
1355 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1356 audit_info.secid = NETLINK_CB(skb).sid;
1357 err = xfrm_state_flush(p->proto, &audit_info);
1360 c.data.proto = p->proto;
1361 c.event = nlh->nlmsg_type;
1362 c.seq = nlh->nlmsg_seq;
1363 c.pid = nlh->nlmsg_pid;
1364 km_state_notify(NULL, &c);
1369 static inline size_t xfrm_aevent_msgsize(void)
1371 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1372 + nla_total_size(sizeof(struct xfrm_replay_state))
1373 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1374 + nla_total_size(4) /* XFRM_AE_RTHR */
1375 + nla_total_size(4); /* XFRM_AE_ETHR */
1378 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1380 struct xfrm_aevent_id *id;
1381 struct nlmsghdr *nlh;
1383 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1387 id = nlmsg_data(nlh);
1388 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1389 id->sa_id.spi = x->id.spi;
1390 id->sa_id.family = x->props.family;
1391 id->sa_id.proto = x->id.proto;
1392 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1393 id->reqid = x->props.reqid;
1394 id->flags = c->data.aevent;
1396 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1397 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1399 if (id->flags & XFRM_AE_RTHR)
1400 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1402 if (id->flags & XFRM_AE_ETHR)
1403 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1404 x->replay_maxage * 10 / HZ);
1406 return nlmsg_end(skb, nlh);
1409 nlmsg_cancel(skb, nlh);
1413 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1414 struct rtattr **attrs)
1416 struct xfrm_state *x;
1417 struct sk_buff *r_skb;
1420 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1421 struct xfrm_usersa_id *id = &p->sa_id;
1423 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1427 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1434 * XXX: is this lock really needed - none of the other
1435 * gets lock (the concern is things getting updated
1436 * while we are still reading) - jhs
1438 spin_lock_bh(&x->lock);
1439 c.data.aevent = p->flags;
1440 c.seq = nlh->nlmsg_seq;
1441 c.pid = nlh->nlmsg_pid;
1443 if (build_aevent(r_skb, x, &c) < 0)
1445 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1446 spin_unlock_bh(&x->lock);
1451 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1452 struct rtattr **attrs)
1454 struct xfrm_state *x;
1457 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1458 struct rtattr *rp = attrs[XFRMA_REPLAY_VAL];
1459 struct rtattr *lt = attrs[XFRMA_LTIME_VAL];
1464 /* pedantic mode - thou shalt sayeth replaceth */
1465 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1468 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1472 if (x->km.state != XFRM_STATE_VALID)
1475 spin_lock_bh(&x->lock);
1476 xfrm_update_ae_params(x, attrs);
1477 spin_unlock_bh(&x->lock);
1479 c.event = nlh->nlmsg_type;
1480 c.seq = nlh->nlmsg_seq;
1481 c.pid = nlh->nlmsg_pid;
1482 c.data.aevent = XFRM_AE_CU;
1483 km_state_notify(x, &c);
1490 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1491 struct rtattr **attrs)
1494 u8 type = XFRM_POLICY_TYPE_MAIN;
1496 struct xfrm_audit audit_info;
1498 err = copy_from_user_policy_type(&type, attrs);
1502 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1503 audit_info.secid = NETLINK_CB(skb).sid;
1504 err = xfrm_policy_flush(type, &audit_info);
1508 c.event = nlh->nlmsg_type;
1509 c.seq = nlh->nlmsg_seq;
1510 c.pid = nlh->nlmsg_pid;
1511 km_policy_notify(NULL, 0, &c);
1515 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1516 struct rtattr **attrs)
1518 struct xfrm_policy *xp;
1519 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1520 struct xfrm_userpolicy_info *p = &up->pol;
1521 u8 type = XFRM_POLICY_TYPE_MAIN;
1524 err = copy_from_user_policy_type(&type, attrs);
1529 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1531 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
1532 struct xfrm_policy tmp;
1534 err = verify_sec_ctx_len(attrs);
1538 memset(&tmp, 0, sizeof(struct xfrm_policy));
1540 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1542 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1545 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1547 security_xfrm_policy_free(&tmp);
1552 read_lock(&xp->lock);
1554 read_unlock(&xp->lock);
1558 read_unlock(&xp->lock);
1561 xfrm_policy_delete(xp, p->dir);
1562 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1563 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1566 // reset the timers here?
1567 printk("Dont know what to do with soft policy expire\n");
1569 km_policy_expired(xp, p->dir, up->hard, current->pid);
1576 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1577 struct rtattr **attrs)
1579 struct xfrm_state *x;
1581 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1582 struct xfrm_usersa_info *p = &ue->state;
1584 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1590 spin_lock_bh(&x->lock);
1592 if (x->km.state != XFRM_STATE_VALID)
1594 km_state_expired(x, ue->hard, current->pid);
1597 __xfrm_state_delete(x);
1598 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1599 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1603 spin_unlock_bh(&x->lock);
1608 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1609 struct rtattr **attrs)
1611 struct xfrm_policy *xp;
1612 struct xfrm_user_tmpl *ut;
1614 struct rtattr *rt = attrs[XFRMA_TMPL];
1616 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1617 struct xfrm_state *x = xfrm_state_alloc();
1623 err = verify_newpolicy_info(&ua->policy);
1625 printk("BAD policy passed\n");
1631 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) attrs, &err);
1637 memcpy(&x->id, &ua->id, sizeof(ua->id));
1638 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1639 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1642 /* extract the templates and for each call km_key */
1643 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1644 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1645 memcpy(&x->id, &t->id, sizeof(x->id));
1646 x->props.mode = t->mode;
1647 x->props.reqid = t->reqid;
1648 x->props.family = ut->family;
1649 t->aalgos = ua->aalgos;
1650 t->ealgos = ua->ealgos;
1651 t->calgos = ua->calgos;
1652 err = km_query(x, t, xp);
1662 #ifdef CONFIG_XFRM_MIGRATE
1663 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1664 struct rtattr **attrs, int *num)
1666 struct rtattr *rt = attrs[XFRMA_MIGRATE];
1667 struct xfrm_user_migrate *um;
1671 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1673 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1676 for (i = 0; i < num_migrate; i++, um++, ma++) {
1677 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1678 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1679 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1680 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1682 ma->proto = um->proto;
1683 ma->mode = um->mode;
1684 ma->reqid = um->reqid;
1686 ma->old_family = um->old_family;
1687 ma->new_family = um->new_family;
1694 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1695 struct rtattr **attrs)
1697 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1698 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1703 if (attrs[XFRMA_MIGRATE] == NULL)
1706 err = copy_from_user_policy_type(&type, (struct rtattr **)attrs);
1710 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1711 (struct rtattr **)attrs, &n);
1718 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1723 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1724 struct rtattr **attrs)
1726 return -ENOPROTOOPT;
1730 #ifdef CONFIG_XFRM_MIGRATE
1731 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1733 struct xfrm_user_migrate um;
1735 memset(&um, 0, sizeof(um));
1736 um.proto = m->proto;
1738 um.reqid = m->reqid;
1739 um.old_family = m->old_family;
1740 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1741 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1742 um.new_family = m->new_family;
1743 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1744 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1746 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1749 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1751 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1752 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1753 + userpolicy_type_attrsize();
1756 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1757 int num_migrate, struct xfrm_selector *sel,
1760 struct xfrm_migrate *mp;
1761 struct xfrm_userpolicy_id *pol_id;
1762 struct nlmsghdr *nlh;
1765 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1769 pol_id = nlmsg_data(nlh);
1770 /* copy data from selector, dir, and type to the pol_id */
1771 memset(pol_id, 0, sizeof(*pol_id));
1772 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1775 if (copy_to_user_policy_type(type, skb) < 0)
1778 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1779 if (copy_to_user_migrate(mp, skb) < 0)
1783 return nlmsg_end(skb, nlh);
1785 nlmsg_cancel(skb, nlh);
1789 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1790 struct xfrm_migrate *m, int num_migrate)
1792 struct sk_buff *skb;
1794 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1799 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1802 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1805 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1806 struct xfrm_migrate *m, int num_migrate)
1808 return -ENOPROTOOPT;
1812 #define XMSGSIZE(type) sizeof(struct type)
1814 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1815 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1816 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1817 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1818 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1819 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1820 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1821 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1822 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1823 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1824 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1825 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1826 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1827 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1828 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1829 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1830 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1831 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1832 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1833 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1834 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1839 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1840 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1841 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1842 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1843 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1844 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1845 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1846 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1847 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1848 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1849 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1850 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1851 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1852 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1853 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1856 static struct xfrm_link {
1857 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1858 int (*dump)(struct sk_buff *, struct netlink_callback *);
1859 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1860 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1861 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1862 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1863 .dump = xfrm_dump_sa },
1864 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1865 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1866 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1867 .dump = xfrm_dump_policy },
1868 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1869 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1870 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1871 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1872 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1873 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1874 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1875 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1876 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1877 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1878 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1879 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1880 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1883 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1885 struct nlattr *attrs[XFRMA_MAX+1];
1886 struct xfrm_link *link;
1889 type = nlh->nlmsg_type;
1890 if (type > XFRM_MSG_MAX)
1893 type -= XFRM_MSG_BASE;
1894 link = &xfrm_dispatch[type];
1896 /* All operations require privileges, even GET */
1897 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1900 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1901 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1902 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1903 if (link->dump == NULL)
1906 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1909 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
1914 if (link->doit == NULL)
1917 return link->doit(skb, nlh, (struct rtattr **) attrs);
1920 static void xfrm_netlink_rcv(struct sock *sk, int len)
1922 unsigned int qlen = 0;
1925 mutex_lock(&xfrm_cfg_mutex);
1926 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1927 mutex_unlock(&xfrm_cfg_mutex);
1932 static inline size_t xfrm_expire_msgsize(void)
1934 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1937 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1939 struct xfrm_user_expire *ue;
1940 struct nlmsghdr *nlh;
1942 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1946 ue = nlmsg_data(nlh);
1947 copy_to_user_state(x, &ue->state);
1948 ue->hard = (c->data.hard != 0) ? 1 : 0;
1950 return nlmsg_end(skb, nlh);
1953 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1955 struct sk_buff *skb;
1957 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1961 if (build_expire(skb, x, c) < 0)
1964 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1967 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1969 struct sk_buff *skb;
1971 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1975 if (build_aevent(skb, x, c) < 0)
1978 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1981 static int xfrm_notify_sa_flush(struct km_event *c)
1983 struct xfrm_usersa_flush *p;
1984 struct nlmsghdr *nlh;
1985 struct sk_buff *skb;
1986 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
1988 skb = nlmsg_new(len, GFP_ATOMIC);
1992 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
1998 p = nlmsg_data(nlh);
1999 p->proto = c->data.proto;
2001 nlmsg_end(skb, nlh);
2003 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2006 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2010 l += nla_total_size(alg_len(x->aalg));
2012 l += nla_total_size(alg_len(x->ealg));
2014 l += nla_total_size(sizeof(*x->calg));
2016 l += nla_total_size(sizeof(*x->encap));
2021 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2023 struct xfrm_usersa_info *p;
2024 struct xfrm_usersa_id *id;
2025 struct nlmsghdr *nlh;
2026 struct sk_buff *skb;
2027 int len = xfrm_sa_len(x);
2030 headlen = sizeof(*p);
2031 if (c->event == XFRM_MSG_DELSA) {
2032 len += nla_total_size(headlen);
2033 headlen = sizeof(*id);
2035 len += NLMSG_ALIGN(headlen);
2037 skb = nlmsg_new(len, GFP_ATOMIC);
2041 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2043 goto nla_put_failure;
2045 p = nlmsg_data(nlh);
2046 if (c->event == XFRM_MSG_DELSA) {
2047 struct nlattr *attr;
2049 id = nlmsg_data(nlh);
2050 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2051 id->spi = x->id.spi;
2052 id->family = x->props.family;
2053 id->proto = x->id.proto;
2055 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2057 goto nla_put_failure;
2062 copy_to_user_state(x, p);
2065 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
2067 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
2069 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2072 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2074 nlmsg_end(skb, nlh);
2076 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2083 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2087 case XFRM_MSG_EXPIRE:
2088 return xfrm_exp_state_notify(x, c);
2089 case XFRM_MSG_NEWAE:
2090 return xfrm_aevent_state_notify(x, c);
2091 case XFRM_MSG_DELSA:
2092 case XFRM_MSG_UPDSA:
2093 case XFRM_MSG_NEWSA:
2094 return xfrm_notify_sa(x, c);
2095 case XFRM_MSG_FLUSHSA:
2096 return xfrm_notify_sa_flush(c);
2098 printk("xfrm_user: Unknown SA event %d\n", c->event);
2106 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2107 struct xfrm_policy *xp)
2109 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2110 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2111 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2112 + userpolicy_type_attrsize();
2115 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2116 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2119 struct xfrm_user_acquire *ua;
2120 struct nlmsghdr *nlh;
2121 __u32 seq = xfrm_get_acqseq();
2123 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2127 ua = nlmsg_data(nlh);
2128 memcpy(&ua->id, &x->id, sizeof(ua->id));
2129 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2130 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2131 copy_to_user_policy(xp, &ua->policy, dir);
2132 ua->aalgos = xt->aalgos;
2133 ua->ealgos = xt->ealgos;
2134 ua->calgos = xt->calgos;
2135 ua->seq = x->km.seq = seq;
2137 if (copy_to_user_tmpl(xp, skb) < 0)
2139 if (copy_to_user_state_sec_ctx(x, skb))
2141 if (copy_to_user_policy_type(xp->type, skb) < 0)
2144 return nlmsg_end(skb, nlh);
2147 nlmsg_cancel(skb, nlh);
2151 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2152 struct xfrm_policy *xp, int dir)
2154 struct sk_buff *skb;
2156 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2160 if (build_acquire(skb, x, xt, xp, dir) < 0)
2163 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2166 /* User gives us xfrm_user_policy_info followed by an array of 0
2167 * or more templates.
2169 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2170 u8 *data, int len, int *dir)
2172 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2173 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2174 struct xfrm_policy *xp;
2177 switch (sk->sk_family) {
2179 if (opt != IP_XFRM_POLICY) {
2184 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2186 if (opt != IPV6_XFRM_POLICY) {
2199 if (len < sizeof(*p) ||
2200 verify_newpolicy_info(p))
2203 nr = ((len - sizeof(*p)) / sizeof(*ut));
2204 if (validate_tmpl(nr, ut, p->sel.family))
2207 if (p->dir > XFRM_POLICY_OUT)
2210 xp = xfrm_policy_alloc(GFP_KERNEL);
2216 copy_from_user_policy(xp, p);
2217 xp->type = XFRM_POLICY_TYPE_MAIN;
2218 copy_templates(xp, ut, nr);
2225 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2227 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2228 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2229 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2230 + userpolicy_type_attrsize();
2233 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2234 int dir, struct km_event *c)
2236 struct xfrm_user_polexpire *upe;
2237 struct nlmsghdr *nlh;
2238 int hard = c->data.hard;
2240 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2244 upe = nlmsg_data(nlh);
2245 copy_to_user_policy(xp, &upe->pol, dir);
2246 if (copy_to_user_tmpl(xp, skb) < 0)
2248 if (copy_to_user_sec_ctx(xp, skb))
2250 if (copy_to_user_policy_type(xp->type, skb) < 0)
2254 return nlmsg_end(skb, nlh);
2257 nlmsg_cancel(skb, nlh);
2261 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2263 struct sk_buff *skb;
2265 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2269 if (build_polexpire(skb, xp, dir, c) < 0)
2272 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2275 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2277 struct xfrm_userpolicy_info *p;
2278 struct xfrm_userpolicy_id *id;
2279 struct nlmsghdr *nlh;
2280 struct sk_buff *skb;
2281 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2284 headlen = sizeof(*p);
2285 if (c->event == XFRM_MSG_DELPOLICY) {
2286 len += nla_total_size(headlen);
2287 headlen = sizeof(*id);
2289 len += userpolicy_type_attrsize();
2290 len += NLMSG_ALIGN(headlen);
2292 skb = nlmsg_new(len, GFP_ATOMIC);
2296 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2300 p = nlmsg_data(nlh);
2301 if (c->event == XFRM_MSG_DELPOLICY) {
2302 struct nlattr *attr;
2304 id = nlmsg_data(nlh);
2305 memset(id, 0, sizeof(*id));
2308 id->index = xp->index;
2310 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2312 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2319 copy_to_user_policy(xp, p, dir);
2320 if (copy_to_user_tmpl(xp, skb) < 0)
2322 if (copy_to_user_policy_type(xp->type, skb) < 0)
2325 nlmsg_end(skb, nlh);
2327 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2334 static int xfrm_notify_policy_flush(struct km_event *c)
2336 struct nlmsghdr *nlh;
2337 struct sk_buff *skb;
2339 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2343 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2346 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2349 nlmsg_end(skb, nlh);
2351 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2358 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2362 case XFRM_MSG_NEWPOLICY:
2363 case XFRM_MSG_UPDPOLICY:
2364 case XFRM_MSG_DELPOLICY:
2365 return xfrm_notify_policy(xp, dir, c);
2366 case XFRM_MSG_FLUSHPOLICY:
2367 return xfrm_notify_policy_flush(c);
2368 case XFRM_MSG_POLEXPIRE:
2369 return xfrm_exp_policy_notify(xp, dir, c);
2371 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2378 static inline size_t xfrm_report_msgsize(void)
2380 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2383 static int build_report(struct sk_buff *skb, u8 proto,
2384 struct xfrm_selector *sel, xfrm_address_t *addr)
2386 struct xfrm_user_report *ur;
2387 struct nlmsghdr *nlh;
2389 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2393 ur = nlmsg_data(nlh);
2395 memcpy(&ur->sel, sel, sizeof(ur->sel));
2398 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2400 return nlmsg_end(skb, nlh);
2403 nlmsg_cancel(skb, nlh);
2407 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2408 xfrm_address_t *addr)
2410 struct sk_buff *skb;
2412 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2416 if (build_report(skb, proto, sel, addr) < 0)
2419 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2422 static struct xfrm_mgr netlink_mgr = {
2424 .notify = xfrm_send_state_notify,
2425 .acquire = xfrm_send_acquire,
2426 .compile_policy = xfrm_compile_policy,
2427 .notify_policy = xfrm_send_policy_notify,
2428 .report = xfrm_send_report,
2429 .migrate = xfrm_send_migrate,
2432 static int __init xfrm_user_init(void)
2436 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2438 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2439 xfrm_netlink_rcv, NULL, THIS_MODULE);
2442 rcu_assign_pointer(xfrm_nl, nlsk);
2444 xfrm_register_km(&netlink_mgr);
2449 static void __exit xfrm_user_exit(void)
2451 struct sock *nlsk = xfrm_nl;
2453 xfrm_unregister_km(&netlink_mgr);
2454 rcu_assign_pointer(xfrm_nl, NULL);
2456 sock_release(nlsk->sk_socket);
2459 module_init(xfrm_user_init);
2460 module_exit(xfrm_user_exit);
2461 MODULE_LICENSE("GPL");
2462 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);