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 int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
38 struct rtattr *rt = xfrma[type - 1];
39 struct xfrm_algo *algp;
45 len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp);
51 len -= (algp->alg_key_len + 7U) / 8;
57 if (!algp->alg_key_len &&
58 strcmp(algp->alg_name, "digest_null") != 0)
63 if (!algp->alg_key_len &&
64 strcmp(algp->alg_name, "cipher_null") != 0)
69 /* Zero length keys are legal. */
76 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
80 static int verify_encap_tmpl(struct rtattr **xfrma)
82 struct rtattr *rt = xfrma[XFRMA_ENCAP - 1];
83 struct xfrm_encap_tmpl *encap;
88 if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap))
94 static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
97 struct rtattr *rt = xfrma[type - 1];
102 if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
106 *addrp = RTA_DATA(rt);
111 static inline int verify_sec_ctx_len(struct rtattr **xfrma)
113 struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
114 struct xfrm_user_sec_ctx *uctx;
120 if (rt->rta_len < sizeof(*uctx))
125 len += sizeof(struct xfrm_user_sec_ctx);
126 len += uctx->ctx_len;
128 if (uctx->len != len)
135 static int verify_newsa_info(struct xfrm_usersa_info *p,
136 struct rtattr **xfrma)
146 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
158 switch (p->id.proto) {
160 if (!xfrma[XFRMA_ALG_AUTH-1] ||
161 xfrma[XFRMA_ALG_CRYPT-1] ||
162 xfrma[XFRMA_ALG_COMP-1])
167 if ((!xfrma[XFRMA_ALG_AUTH-1] &&
168 !xfrma[XFRMA_ALG_CRYPT-1]) ||
169 xfrma[XFRMA_ALG_COMP-1])
174 if (!xfrma[XFRMA_ALG_COMP-1] ||
175 xfrma[XFRMA_ALG_AUTH-1] ||
176 xfrma[XFRMA_ALG_CRYPT-1])
180 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
181 case IPPROTO_DSTOPTS:
182 case IPPROTO_ROUTING:
183 if (xfrma[XFRMA_ALG_COMP-1] ||
184 xfrma[XFRMA_ALG_AUTH-1] ||
185 xfrma[XFRMA_ALG_CRYPT-1] ||
186 xfrma[XFRMA_ENCAP-1] ||
187 xfrma[XFRMA_SEC_CTX-1] ||
188 !xfrma[XFRMA_COADDR-1])
197 if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH)))
199 if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT)))
201 if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP)))
203 if ((err = verify_encap_tmpl(xfrma)))
205 if ((err = verify_sec_ctx_len(xfrma)))
207 if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
212 case XFRM_MODE_TRANSPORT:
213 case XFRM_MODE_TUNNEL:
214 case XFRM_MODE_ROUTEOPTIMIZATION:
228 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
229 struct xfrm_algo_desc *(*get_byname)(char *, int),
230 struct rtattr *u_arg)
232 struct rtattr *rta = u_arg;
233 struct xfrm_algo *p, *ualg;
234 struct xfrm_algo_desc *algo;
240 ualg = RTA_DATA(rta);
242 algo = get_byname(ualg->alg_name, 1);
245 *props = algo->desc.sadb_alg_id;
247 len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
248 p = kmemdup(ualg, len, GFP_KERNEL);
252 strcpy(p->alg_name, algo->name);
257 static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
259 struct rtattr *rta = u_arg;
260 struct xfrm_encap_tmpl *p, *uencap;
265 uencap = RTA_DATA(rta);
266 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
275 static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp)
277 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
281 len += sizeof(struct xfrm_user_sec_ctx);
282 len += xfrm_ctx->ctx_len;
287 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
289 struct xfrm_user_sec_ctx *uctx;
294 uctx = RTA_DATA(u_arg);
295 return security_xfrm_state_alloc(x, uctx);
298 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
300 struct rtattr *rta = u_arg;
301 xfrm_address_t *p, *uaddrp;
306 uaddrp = RTA_DATA(rta);
307 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
315 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
317 memcpy(&x->id, &p->id, sizeof(x->id));
318 memcpy(&x->sel, &p->sel, sizeof(x->sel));
319 memcpy(&x->lft, &p->lft, sizeof(x->lft));
320 x->props.mode = p->mode;
321 x->props.replay_window = p->replay_window;
322 x->props.reqid = p->reqid;
323 x->props.family = p->family;
324 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
325 x->props.flags = p->flags;
329 * someday when pfkey also has support, we could have the code
330 * somehow made shareable and move it to xfrm_state.c - JHS
333 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
336 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
337 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
338 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
339 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
342 struct xfrm_replay_state *replay;
343 if (RTA_PAYLOAD(rp) < sizeof(*replay))
345 replay = RTA_DATA(rp);
346 memcpy(&x->replay, replay, sizeof(*replay));
347 memcpy(&x->preplay, replay, sizeof(*replay));
351 struct xfrm_lifetime_cur *ltime;
352 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
354 ltime = RTA_DATA(lt);
355 x->curlft.bytes = ltime->bytes;
356 x->curlft.packets = ltime->packets;
357 x->curlft.add_time = ltime->add_time;
358 x->curlft.use_time = ltime->use_time;
362 if (RTA_PAYLOAD(et) < sizeof(u32))
364 x->replay_maxage = *(u32*)RTA_DATA(et);
368 if (RTA_PAYLOAD(rt) < sizeof(u32))
370 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
378 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
379 struct rtattr **xfrma,
382 struct xfrm_state *x = xfrm_state_alloc();
388 copy_from_user_state(x, p);
390 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
391 xfrm_aalg_get_byname,
392 xfrma[XFRMA_ALG_AUTH-1])))
394 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
395 xfrm_ealg_get_byname,
396 xfrma[XFRMA_ALG_CRYPT-1])))
398 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
399 xfrm_calg_get_byname,
400 xfrma[XFRMA_ALG_COMP-1])))
402 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
404 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
406 err = xfrm_init_state(x);
410 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
414 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
415 /* sysctl_xfrm_aevent_etime is in 100ms units */
416 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
417 x->preplay.bitmap = 0;
418 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
419 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
421 /* override default values from above */
423 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
430 x->km.state = XFRM_STATE_DEAD;
437 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
438 struct rtattr **xfrma)
440 struct xfrm_usersa_info *p = NLMSG_DATA(nlh);
441 struct xfrm_state *x;
445 err = verify_newsa_info(p, xfrma);
449 x = xfrm_state_construct(p, xfrma, &err);
454 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
455 err = xfrm_state_add(x);
457 err = xfrm_state_update(x);
459 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
460 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
463 x->km.state = XFRM_STATE_DEAD;
468 c.seq = nlh->nlmsg_seq;
469 c.pid = nlh->nlmsg_pid;
470 c.event = nlh->nlmsg_type;
472 km_state_notify(x, &c);
478 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
479 struct rtattr **xfrma,
482 struct xfrm_state *x = NULL;
485 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
487 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
489 xfrm_address_t *saddr = NULL;
491 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
501 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
511 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
512 struct rtattr **xfrma)
514 struct xfrm_state *x;
517 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
519 x = xfrm_user_state_lookup(p, xfrma, &err);
523 if ((err = security_xfrm_state_delete(x)) != 0)
526 if (xfrm_state_kern(x)) {
531 err = xfrm_state_delete(x);
533 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
534 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
539 c.seq = nlh->nlmsg_seq;
540 c.pid = nlh->nlmsg_pid;
541 c.event = nlh->nlmsg_type;
542 km_state_notify(x, &c);
549 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
551 memcpy(&p->id, &x->id, sizeof(p->id));
552 memcpy(&p->sel, &x->sel, sizeof(p->sel));
553 memcpy(&p->lft, &x->lft, sizeof(p->lft));
554 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
555 memcpy(&p->stats, &x->stats, sizeof(p->stats));
556 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
557 p->mode = x->props.mode;
558 p->replay_window = x->props.replay_window;
559 p->reqid = x->props.reqid;
560 p->family = x->props.family;
561 p->flags = x->props.flags;
565 struct xfrm_dump_info {
566 struct sk_buff *in_skb;
567 struct sk_buff *out_skb;
574 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
576 struct xfrm_dump_info *sp = ptr;
577 struct sk_buff *in_skb = sp->in_skb;
578 struct sk_buff *skb = sp->out_skb;
579 struct xfrm_usersa_info *p;
580 struct nlmsghdr *nlh;
581 unsigned char *b = skb->tail;
583 if (sp->this_idx < sp->start_idx)
586 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
588 XFRM_MSG_NEWSA, sizeof(*p));
589 nlh->nlmsg_flags = sp->nlmsg_flags;
592 copy_to_user_state(x, p);
595 RTA_PUT(skb, XFRMA_ALG_AUTH,
596 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
598 RTA_PUT(skb, XFRMA_ALG_CRYPT,
599 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
601 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
604 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
607 int ctx_size = sizeof(struct xfrm_sec_ctx) +
608 x->security->ctx_len;
609 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
610 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
612 uctx->exttype = XFRMA_SEC_CTX;
613 uctx->len = ctx_size;
614 uctx->ctx_doi = x->security->ctx_doi;
615 uctx->ctx_alg = x->security->ctx_alg;
616 uctx->ctx_len = x->security->ctx_len;
617 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
621 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
624 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
626 nlh->nlmsg_len = skb->tail - b;
633 skb_trim(skb, b - skb->data);
637 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
639 struct xfrm_dump_info info;
641 info.in_skb = cb->skb;
643 info.nlmsg_seq = cb->nlh->nlmsg_seq;
644 info.nlmsg_flags = NLM_F_MULTI;
646 info.start_idx = cb->args[0];
647 (void) xfrm_state_walk(0, dump_one_state, &info);
648 cb->args[0] = info.this_idx;
653 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
654 struct xfrm_state *x, u32 seq)
656 struct xfrm_dump_info info;
659 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
661 return ERR_PTR(-ENOMEM);
663 info.in_skb = in_skb;
665 info.nlmsg_seq = seq;
666 info.nlmsg_flags = 0;
667 info.this_idx = info.start_idx = 0;
669 if (dump_one_state(x, 0, &info)) {
677 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
678 struct rtattr **xfrma)
680 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
681 struct xfrm_state *x;
682 struct sk_buff *resp_skb;
685 x = xfrm_user_state_lookup(p, xfrma, &err);
689 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
690 if (IS_ERR(resp_skb)) {
691 err = PTR_ERR(resp_skb);
693 err = netlink_unicast(xfrm_nl, resp_skb,
694 NETLINK_CB(skb).pid, MSG_DONTWAIT);
701 static int verify_userspi_info(struct xfrm_userspi_info *p)
703 switch (p->info.id.proto) {
709 /* IPCOMP spi is 16-bits. */
710 if (p->max >= 0x10000)
724 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
725 struct rtattr **xfrma)
727 struct xfrm_state *x;
728 struct xfrm_userspi_info *p;
729 struct sk_buff *resp_skb;
730 xfrm_address_t *daddr;
735 err = verify_userspi_info(p);
739 family = p->info.family;
740 daddr = &p->info.id.daddr;
744 x = xfrm_find_acq_byseq(p->info.seq);
745 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
752 x = xfrm_find_acq(p->info.mode, p->info.reqid,
753 p->info.id.proto, daddr,
760 resp_skb = ERR_PTR(-ENOENT);
762 spin_lock_bh(&x->lock);
763 if (x->km.state != XFRM_STATE_DEAD) {
764 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
766 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
768 spin_unlock_bh(&x->lock);
770 if (IS_ERR(resp_skb)) {
771 err = PTR_ERR(resp_skb);
775 err = netlink_unicast(xfrm_nl, resp_skb,
776 NETLINK_CB(skb).pid, MSG_DONTWAIT);
784 static int verify_policy_dir(u8 dir)
788 case XFRM_POLICY_OUT:
789 case XFRM_POLICY_FWD:
799 static int verify_policy_type(u8 type)
802 case XFRM_POLICY_TYPE_MAIN:
803 #ifdef CONFIG_XFRM_SUB_POLICY
804 case XFRM_POLICY_TYPE_SUB:
815 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
819 case XFRM_SHARE_SESSION:
820 case XFRM_SHARE_USER:
821 case XFRM_SHARE_UNIQUE:
829 case XFRM_POLICY_ALLOW:
830 case XFRM_POLICY_BLOCK:
837 switch (p->sel.family) {
842 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
845 return -EAFNOSUPPORT;
852 return verify_policy_dir(p->dir);
855 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
857 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
858 struct xfrm_user_sec_ctx *uctx;
864 return security_xfrm_policy_alloc(pol, uctx);
867 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
873 for (i = 0; i < nr; i++, ut++) {
874 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
876 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
877 memcpy(&t->saddr, &ut->saddr,
878 sizeof(xfrm_address_t));
879 t->reqid = ut->reqid;
881 t->share = ut->share;
882 t->optional = ut->optional;
883 t->aalgos = ut->aalgos;
884 t->ealgos = ut->ealgos;
885 t->calgos = ut->calgos;
886 t->encap_family = ut->family;
890 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
894 if (nr > XFRM_MAX_DEPTH)
897 for (i = 0; i < nr; i++) {
898 /* We never validated the ut->family value, so many
899 * applications simply leave it at zero. The check was
900 * never made and ut->family was ignored because all
901 * templates could be assumed to have the same family as
902 * the policy itself. Now that we will have ipv4-in-ipv6
903 * and ipv6-in-ipv4 tunnels, this is no longer true.
906 ut[i].family = family;
908 switch (ut[i].family) {
911 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
923 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
925 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
930 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
931 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
934 err = validate_tmpl(nr, utmpl, pol->family);
938 copy_templates(pol, RTA_DATA(rt), nr);
943 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
945 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
946 struct xfrm_userpolicy_type *upt;
947 u8 type = XFRM_POLICY_TYPE_MAIN;
951 if (rt->rta_len < sizeof(*upt))
958 err = verify_policy_type(type);
966 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
968 xp->priority = p->priority;
969 xp->index = p->index;
970 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
971 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
972 xp->action = p->action;
973 xp->flags = p->flags;
974 xp->family = p->sel.family;
975 /* XXX xp->share = p->share; */
978 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
980 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
981 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
982 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
983 p->priority = xp->priority;
984 p->index = xp->index;
985 p->sel.family = xp->family;
987 p->action = xp->action;
988 p->flags = xp->flags;
989 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
992 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
994 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1002 copy_from_user_policy(xp, p);
1004 err = copy_from_user_policy_type(&xp->type, xfrma);
1008 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1009 err = copy_from_user_sec_ctx(xp, xfrma);
1020 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1021 struct rtattr **xfrma)
1023 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1024 struct xfrm_policy *xp;
1029 err = verify_newpolicy_info(p);
1032 err = verify_sec_ctx_len(xfrma);
1036 xp = xfrm_policy_construct(p, xfrma, &err);
1040 /* shouldnt excl be based on nlh flags??
1041 * Aha! this is anti-netlink really i.e more pfkey derived
1042 * in netlink excl is a flag and you wouldnt need
1043 * a type XFRM_MSG_UPDPOLICY - JHS */
1044 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1045 err = xfrm_policy_insert(p->dir, xp, excl);
1046 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1047 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1050 security_xfrm_policy_free(xp);
1055 c.event = nlh->nlmsg_type;
1056 c.seq = nlh->nlmsg_seq;
1057 c.pid = nlh->nlmsg_pid;
1058 km_policy_notify(xp, p->dir, &c);
1065 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1067 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1070 if (xp->xfrm_nr == 0)
1073 for (i = 0; i < xp->xfrm_nr; i++) {
1074 struct xfrm_user_tmpl *up = &vec[i];
1075 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1077 memcpy(&up->id, &kp->id, sizeof(up->id));
1078 up->family = kp->encap_family;
1079 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1080 up->reqid = kp->reqid;
1081 up->mode = kp->mode;
1082 up->share = kp->share;
1083 up->optional = kp->optional;
1084 up->aalgos = kp->aalgos;
1085 up->ealgos = kp->ealgos;
1086 up->calgos = kp->calgos;
1088 RTA_PUT(skb, XFRMA_TMPL,
1089 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1098 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1100 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1101 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1102 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1104 uctx->exttype = XFRMA_SEC_CTX;
1105 uctx->len = ctx_size;
1106 uctx->ctx_doi = s->ctx_doi;
1107 uctx->ctx_alg = s->ctx_alg;
1108 uctx->ctx_len = s->ctx_len;
1109 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1116 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1119 return copy_sec_ctx(x->security, skb);
1124 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1127 return copy_sec_ctx(xp->security, skb);
1132 #ifdef CONFIG_XFRM_SUB_POLICY
1133 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1135 struct xfrm_userpolicy_type upt;
1137 memset(&upt, 0, sizeof(upt));
1140 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1149 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1155 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1157 struct xfrm_dump_info *sp = ptr;
1158 struct xfrm_userpolicy_info *p;
1159 struct sk_buff *in_skb = sp->in_skb;
1160 struct sk_buff *skb = sp->out_skb;
1161 struct nlmsghdr *nlh;
1162 unsigned char *b = skb->tail;
1164 if (sp->this_idx < sp->start_idx)
1167 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1169 XFRM_MSG_NEWPOLICY, sizeof(*p));
1170 p = NLMSG_DATA(nlh);
1171 nlh->nlmsg_flags = sp->nlmsg_flags;
1173 copy_to_user_policy(xp, p, dir);
1174 if (copy_to_user_tmpl(xp, skb) < 0)
1176 if (copy_to_user_sec_ctx(xp, skb))
1178 if (copy_to_user_policy_type(xp->type, skb) < 0)
1181 nlh->nlmsg_len = skb->tail - b;
1187 skb_trim(skb, b - skb->data);
1191 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1193 struct xfrm_dump_info info;
1195 info.in_skb = cb->skb;
1197 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1198 info.nlmsg_flags = NLM_F_MULTI;
1200 info.start_idx = cb->args[0];
1201 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1202 #ifdef CONFIG_XFRM_SUB_POLICY
1203 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1205 cb->args[0] = info.this_idx;
1210 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1211 struct xfrm_policy *xp,
1214 struct xfrm_dump_info info;
1215 struct sk_buff *skb;
1217 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1219 return ERR_PTR(-ENOMEM);
1221 info.in_skb = in_skb;
1223 info.nlmsg_seq = seq;
1224 info.nlmsg_flags = 0;
1225 info.this_idx = info.start_idx = 0;
1227 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1235 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1236 struct rtattr **xfrma)
1238 struct xfrm_policy *xp;
1239 struct xfrm_userpolicy_id *p;
1240 u8 type = XFRM_POLICY_TYPE_MAIN;
1245 p = NLMSG_DATA(nlh);
1246 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1248 err = copy_from_user_policy_type(&type, xfrma);
1252 err = verify_policy_dir(p->dir);
1257 xp = xfrm_policy_byid(type, p->dir, p->index, delete);
1259 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1260 struct xfrm_policy tmp;
1262 err = verify_sec_ctx_len(xfrma);
1266 memset(&tmp, 0, sizeof(struct xfrm_policy));
1268 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1270 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1273 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, delete);
1274 security_xfrm_policy_free(&tmp);
1277 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1278 AUDIT_MAC_IPSEC_DELSPD, (xp) ? 1 : 0, xp, NULL);
1284 struct sk_buff *resp_skb;
1286 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1287 if (IS_ERR(resp_skb)) {
1288 err = PTR_ERR(resp_skb);
1290 err = netlink_unicast(xfrm_nl, resp_skb,
1291 NETLINK_CB(skb).pid,
1295 if ((err = security_xfrm_policy_delete(xp)) != 0)
1297 c.data.byid = p->index;
1298 c.event = nlh->nlmsg_type;
1299 c.seq = nlh->nlmsg_seq;
1300 c.pid = nlh->nlmsg_pid;
1301 km_policy_notify(xp, p->dir, &c);
1310 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1311 struct rtattr **xfrma)
1314 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1315 struct xfrm_audit audit_info;
1317 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1318 audit_info.secid = NETLINK_CB(skb).sid;
1319 xfrm_state_flush(p->proto, &audit_info);
1320 c.data.proto = p->proto;
1321 c.event = nlh->nlmsg_type;
1322 c.seq = nlh->nlmsg_seq;
1323 c.pid = nlh->nlmsg_pid;
1324 km_state_notify(NULL, &c);
1330 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1332 struct xfrm_aevent_id *id;
1333 struct nlmsghdr *nlh;
1334 struct xfrm_lifetime_cur ltime;
1335 unsigned char *b = skb->tail;
1337 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1338 id = NLMSG_DATA(nlh);
1339 nlh->nlmsg_flags = 0;
1341 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1342 id->sa_id.spi = x->id.spi;
1343 id->sa_id.family = x->props.family;
1344 id->sa_id.proto = x->id.proto;
1345 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1346 id->reqid = x->props.reqid;
1347 id->flags = c->data.aevent;
1349 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1351 ltime.bytes = x->curlft.bytes;
1352 ltime.packets = x->curlft.packets;
1353 ltime.add_time = x->curlft.add_time;
1354 ltime.use_time = x->curlft.use_time;
1356 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1358 if (id->flags&XFRM_AE_RTHR) {
1359 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1362 if (id->flags&XFRM_AE_ETHR) {
1363 u32 etimer = x->replay_maxage*10/HZ;
1364 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1367 nlh->nlmsg_len = skb->tail - b;
1372 skb_trim(skb, b - skb->data);
1376 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1377 struct rtattr **xfrma)
1379 struct xfrm_state *x;
1380 struct sk_buff *r_skb;
1383 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1384 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1385 struct xfrm_usersa_id *id = &p->sa_id;
1387 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1388 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1390 if (p->flags&XFRM_AE_RTHR)
1391 len+=RTA_SPACE(sizeof(u32));
1393 if (p->flags&XFRM_AE_ETHR)
1394 len+=RTA_SPACE(sizeof(u32));
1396 r_skb = alloc_skb(len, GFP_ATOMIC);
1400 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1407 * XXX: is this lock really needed - none of the other
1408 * gets lock (the concern is things getting updated
1409 * while we are still reading) - jhs
1411 spin_lock_bh(&x->lock);
1412 c.data.aevent = p->flags;
1413 c.seq = nlh->nlmsg_seq;
1414 c.pid = nlh->nlmsg_pid;
1416 if (build_aevent(r_skb, x, &c) < 0)
1418 err = netlink_unicast(xfrm_nl, r_skb,
1419 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1420 spin_unlock_bh(&x->lock);
1425 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1426 struct rtattr **xfrma)
1428 struct xfrm_state *x;
1431 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1432 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1433 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1438 /* pedantic mode - thou shalt sayeth replaceth */
1439 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1442 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1446 if (x->km.state != XFRM_STATE_VALID)
1449 spin_lock_bh(&x->lock);
1450 err = xfrm_update_ae_params(x, xfrma);
1451 spin_unlock_bh(&x->lock);
1455 c.event = nlh->nlmsg_type;
1456 c.seq = nlh->nlmsg_seq;
1457 c.pid = nlh->nlmsg_pid;
1458 c.data.aevent = XFRM_AE_CU;
1459 km_state_notify(x, &c);
1466 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1467 struct rtattr **xfrma)
1470 u8 type = XFRM_POLICY_TYPE_MAIN;
1472 struct xfrm_audit audit_info;
1474 err = copy_from_user_policy_type(&type, xfrma);
1478 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1479 audit_info.secid = NETLINK_CB(skb).sid;
1480 xfrm_policy_flush(type, &audit_info);
1482 c.event = nlh->nlmsg_type;
1483 c.seq = nlh->nlmsg_seq;
1484 c.pid = nlh->nlmsg_pid;
1485 km_policy_notify(NULL, 0, &c);
1489 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1490 struct rtattr **xfrma)
1492 struct xfrm_policy *xp;
1493 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1494 struct xfrm_userpolicy_info *p = &up->pol;
1495 u8 type = XFRM_POLICY_TYPE_MAIN;
1498 err = copy_from_user_policy_type(&type, xfrma);
1503 xp = xfrm_policy_byid(type, p->dir, p->index, 0);
1505 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1506 struct xfrm_policy tmp;
1508 err = verify_sec_ctx_len(xfrma);
1512 memset(&tmp, 0, sizeof(struct xfrm_policy));
1514 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1516 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1519 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, 0);
1520 security_xfrm_policy_free(&tmp);
1525 read_lock(&xp->lock);
1527 read_unlock(&xp->lock);
1531 read_unlock(&xp->lock);
1534 xfrm_policy_delete(xp, p->dir);
1535 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1536 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1539 // reset the timers here?
1540 printk("Dont know what to do with soft policy expire\n");
1542 km_policy_expired(xp, p->dir, up->hard, current->pid);
1549 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1550 struct rtattr **xfrma)
1552 struct xfrm_state *x;
1554 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1555 struct xfrm_usersa_info *p = &ue->state;
1557 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1565 spin_lock_bh(&x->lock);
1566 if (x->km.state != XFRM_STATE_VALID)
1568 km_state_expired(x, ue->hard, current->pid);
1571 __xfrm_state_delete(x);
1572 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1573 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1576 spin_unlock_bh(&x->lock);
1581 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1582 struct rtattr **xfrma)
1584 struct xfrm_policy *xp;
1585 struct xfrm_user_tmpl *ut;
1587 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1589 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1590 struct xfrm_state *x = xfrm_state_alloc();
1596 err = verify_newpolicy_info(&ua->policy);
1598 printk("BAD policy passed\n");
1604 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1610 memcpy(&x->id, &ua->id, sizeof(ua->id));
1611 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1612 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1615 /* extract the templates and for each call km_key */
1616 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1617 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1618 memcpy(&x->id, &t->id, sizeof(x->id));
1619 x->props.mode = t->mode;
1620 x->props.reqid = t->reqid;
1621 x->props.family = ut->family;
1622 t->aalgos = ua->aalgos;
1623 t->ealgos = ua->ealgos;
1624 t->calgos = ua->calgos;
1625 err = km_query(x, t, xp);
1636 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1638 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1639 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1640 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1641 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1642 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1643 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1644 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1645 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1646 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1647 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1648 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1649 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1650 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1651 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1652 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1653 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1654 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1655 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1660 static struct xfrm_link {
1661 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1662 int (*dump)(struct sk_buff *, struct netlink_callback *);
1663 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1664 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1665 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1666 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1667 .dump = xfrm_dump_sa },
1668 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1669 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1670 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1671 .dump = xfrm_dump_policy },
1672 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1673 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1674 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1675 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1676 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1677 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1678 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1679 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1680 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1681 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1684 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
1686 struct rtattr *xfrma[XFRMA_MAX];
1687 struct xfrm_link *link;
1690 if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
1693 type = nlh->nlmsg_type;
1695 /* A control message: ignore them */
1696 if (type < XFRM_MSG_BASE)
1699 /* Unknown message: reply with EINVAL */
1700 if (type > XFRM_MSG_MAX)
1703 type -= XFRM_MSG_BASE;
1704 link = &xfrm_dispatch[type];
1706 /* All operations require privileges, even GET */
1707 if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
1712 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1713 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1714 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1715 if (link->dump == NULL)
1718 if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh,
1719 link->dump, NULL)) != 0) {
1723 netlink_queue_skip(nlh, skb);
1727 memset(xfrma, 0, sizeof(xfrma));
1729 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1732 if (nlh->nlmsg_len > min_len) {
1733 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1734 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1736 while (RTA_OK(attr, attrlen)) {
1737 unsigned short flavor = attr->rta_type;
1739 if (flavor > XFRMA_MAX)
1741 xfrma[flavor - 1] = attr;
1743 attr = RTA_NEXT(attr, attrlen);
1747 if (link->doit == NULL)
1749 *errp = link->doit(skb, nlh, xfrma);
1758 static void xfrm_netlink_rcv(struct sock *sk, int len)
1760 unsigned int qlen = 0;
1763 mutex_lock(&xfrm_cfg_mutex);
1764 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1765 mutex_unlock(&xfrm_cfg_mutex);
1770 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1772 struct xfrm_user_expire *ue;
1773 struct nlmsghdr *nlh;
1774 unsigned char *b = skb->tail;
1776 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
1778 ue = NLMSG_DATA(nlh);
1779 nlh->nlmsg_flags = 0;
1781 copy_to_user_state(x, &ue->state);
1782 ue->hard = (c->data.hard != 0) ? 1 : 0;
1784 nlh->nlmsg_len = skb->tail - b;
1788 skb_trim(skb, b - skb->data);
1792 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1794 struct sk_buff *skb;
1795 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
1797 skb = alloc_skb(len, GFP_ATOMIC);
1801 if (build_expire(skb, x, c) < 0)
1804 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
1805 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1808 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1810 struct sk_buff *skb;
1811 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1813 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1814 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1815 skb = alloc_skb(len, GFP_ATOMIC);
1819 if (build_aevent(skb, x, c) < 0)
1822 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
1823 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1826 static int xfrm_notify_sa_flush(struct km_event *c)
1828 struct xfrm_usersa_flush *p;
1829 struct nlmsghdr *nlh;
1830 struct sk_buff *skb;
1832 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
1834 skb = alloc_skb(len, GFP_ATOMIC);
1839 nlh = NLMSG_PUT(skb, c->pid, c->seq,
1840 XFRM_MSG_FLUSHSA, sizeof(*p));
1841 nlh->nlmsg_flags = 0;
1843 p = NLMSG_DATA(nlh);
1844 p->proto = c->data.proto;
1846 nlh->nlmsg_len = skb->tail - b;
1848 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
1849 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1856 static int inline xfrm_sa_len(struct xfrm_state *x)
1860 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
1862 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
1864 l += RTA_SPACE(sizeof(*x->calg));
1866 l += RTA_SPACE(sizeof(*x->encap));
1871 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
1873 struct xfrm_usersa_info *p;
1874 struct xfrm_usersa_id *id;
1875 struct nlmsghdr *nlh;
1876 struct sk_buff *skb;
1878 int len = xfrm_sa_len(x);
1881 headlen = sizeof(*p);
1882 if (c->event == XFRM_MSG_DELSA) {
1883 len += RTA_SPACE(headlen);
1884 headlen = sizeof(*id);
1886 len += NLMSG_SPACE(headlen);
1888 skb = alloc_skb(len, GFP_ATOMIC);
1893 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
1894 nlh->nlmsg_flags = 0;
1896 p = NLMSG_DATA(nlh);
1897 if (c->event == XFRM_MSG_DELSA) {
1898 id = NLMSG_DATA(nlh);
1899 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
1900 id->spi = x->id.spi;
1901 id->family = x->props.family;
1902 id->proto = x->id.proto;
1904 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
1907 copy_to_user_state(x, p);
1910 RTA_PUT(skb, XFRMA_ALG_AUTH,
1911 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
1913 RTA_PUT(skb, XFRMA_ALG_CRYPT,
1914 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
1916 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1919 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1921 nlh->nlmsg_len = skb->tail - b;
1923 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
1924 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1932 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
1936 case XFRM_MSG_EXPIRE:
1937 return xfrm_exp_state_notify(x, c);
1938 case XFRM_MSG_NEWAE:
1939 return xfrm_aevent_state_notify(x, c);
1940 case XFRM_MSG_DELSA:
1941 case XFRM_MSG_UPDSA:
1942 case XFRM_MSG_NEWSA:
1943 return xfrm_notify_sa(x, c);
1944 case XFRM_MSG_FLUSHSA:
1945 return xfrm_notify_sa_flush(c);
1947 printk("xfrm_user: Unknown SA event %d\n", c->event);
1955 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
1956 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
1959 struct xfrm_user_acquire *ua;
1960 struct nlmsghdr *nlh;
1961 unsigned char *b = skb->tail;
1962 __u32 seq = xfrm_get_acqseq();
1964 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
1966 ua = NLMSG_DATA(nlh);
1967 nlh->nlmsg_flags = 0;
1969 memcpy(&ua->id, &x->id, sizeof(ua->id));
1970 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
1971 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
1972 copy_to_user_policy(xp, &ua->policy, dir);
1973 ua->aalgos = xt->aalgos;
1974 ua->ealgos = xt->ealgos;
1975 ua->calgos = xt->calgos;
1976 ua->seq = x->km.seq = seq;
1978 if (copy_to_user_tmpl(xp, skb) < 0)
1980 if (copy_to_user_state_sec_ctx(x, skb))
1982 if (copy_to_user_policy_type(xp->type, skb) < 0)
1985 nlh->nlmsg_len = skb->tail - b;
1989 skb_trim(skb, b - skb->data);
1993 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
1994 struct xfrm_policy *xp, int dir)
1996 struct sk_buff *skb;
1999 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2000 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2001 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
2002 #ifdef CONFIG_XFRM_SUB_POLICY
2003 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2005 skb = alloc_skb(len, GFP_ATOMIC);
2009 if (build_acquire(skb, x, xt, xp, dir) < 0)
2012 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2013 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2016 /* User gives us xfrm_user_policy_info followed by an array of 0
2017 * or more templates.
2019 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2020 u8 *data, int len, int *dir)
2022 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2023 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2024 struct xfrm_policy *xp;
2027 switch (sk->sk_family) {
2029 if (opt != IP_XFRM_POLICY) {
2034 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2036 if (opt != IPV6_XFRM_POLICY) {
2049 if (len < sizeof(*p) ||
2050 verify_newpolicy_info(p))
2053 nr = ((len - sizeof(*p)) / sizeof(*ut));
2054 if (validate_tmpl(nr, ut, p->sel.family))
2057 if (p->dir > XFRM_POLICY_OUT)
2060 xp = xfrm_policy_alloc(GFP_KERNEL);
2066 copy_from_user_policy(xp, p);
2067 xp->type = XFRM_POLICY_TYPE_MAIN;
2068 copy_templates(xp, ut, nr);
2075 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2076 int dir, struct km_event *c)
2078 struct xfrm_user_polexpire *upe;
2079 struct nlmsghdr *nlh;
2080 int hard = c->data.hard;
2081 unsigned char *b = skb->tail;
2083 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2084 upe = NLMSG_DATA(nlh);
2085 nlh->nlmsg_flags = 0;
2087 copy_to_user_policy(xp, &upe->pol, dir);
2088 if (copy_to_user_tmpl(xp, skb) < 0)
2090 if (copy_to_user_sec_ctx(xp, skb))
2092 if (copy_to_user_policy_type(xp->type, skb) < 0)
2096 nlh->nlmsg_len = skb->tail - b;
2100 skb_trim(skb, b - skb->data);
2104 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2106 struct sk_buff *skb;
2109 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2110 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2111 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
2112 #ifdef CONFIG_XFRM_SUB_POLICY
2113 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2115 skb = alloc_skb(len, GFP_ATOMIC);
2119 if (build_polexpire(skb, xp, dir, c) < 0)
2122 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2123 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2126 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2128 struct xfrm_userpolicy_info *p;
2129 struct xfrm_userpolicy_id *id;
2130 struct nlmsghdr *nlh;
2131 struct sk_buff *skb;
2133 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2136 headlen = sizeof(*p);
2137 if (c->event == XFRM_MSG_DELPOLICY) {
2138 len += RTA_SPACE(headlen);
2139 headlen = sizeof(*id);
2141 #ifdef CONFIG_XFRM_SUB_POLICY
2142 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2144 len += NLMSG_SPACE(headlen);
2146 skb = alloc_skb(len, GFP_ATOMIC);
2151 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2153 p = NLMSG_DATA(nlh);
2154 if (c->event == XFRM_MSG_DELPOLICY) {
2155 id = NLMSG_DATA(nlh);
2156 memset(id, 0, sizeof(*id));
2159 id->index = xp->index;
2161 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2163 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2166 nlh->nlmsg_flags = 0;
2168 copy_to_user_policy(xp, p, dir);
2169 if (copy_to_user_tmpl(xp, skb) < 0)
2171 if (copy_to_user_policy_type(xp->type, skb) < 0)
2174 nlh->nlmsg_len = skb->tail - b;
2176 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2177 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2185 static int xfrm_notify_policy_flush(struct km_event *c)
2187 struct nlmsghdr *nlh;
2188 struct sk_buff *skb;
2191 #ifdef CONFIG_XFRM_SUB_POLICY
2192 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2194 len += NLMSG_LENGTH(0);
2196 skb = alloc_skb(len, GFP_ATOMIC);
2202 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2203 nlh->nlmsg_flags = 0;
2204 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2207 nlh->nlmsg_len = skb->tail - b;
2209 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2210 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2217 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2221 case XFRM_MSG_NEWPOLICY:
2222 case XFRM_MSG_UPDPOLICY:
2223 case XFRM_MSG_DELPOLICY:
2224 return xfrm_notify_policy(xp, dir, c);
2225 case XFRM_MSG_FLUSHPOLICY:
2226 return xfrm_notify_policy_flush(c);
2227 case XFRM_MSG_POLEXPIRE:
2228 return xfrm_exp_policy_notify(xp, dir, c);
2230 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2237 static int build_report(struct sk_buff *skb, u8 proto,
2238 struct xfrm_selector *sel, xfrm_address_t *addr)
2240 struct xfrm_user_report *ur;
2241 struct nlmsghdr *nlh;
2242 unsigned char *b = skb->tail;
2244 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2245 ur = NLMSG_DATA(nlh);
2246 nlh->nlmsg_flags = 0;
2249 memcpy(&ur->sel, sel, sizeof(ur->sel));
2252 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2254 nlh->nlmsg_len = skb->tail - b;
2259 skb_trim(skb, b - skb->data);
2263 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2264 xfrm_address_t *addr)
2266 struct sk_buff *skb;
2269 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2270 skb = alloc_skb(len, GFP_ATOMIC);
2274 if (build_report(skb, proto, sel, addr) < 0)
2277 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2278 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2281 static struct xfrm_mgr netlink_mgr = {
2283 .notify = xfrm_send_state_notify,
2284 .acquire = xfrm_send_acquire,
2285 .compile_policy = xfrm_compile_policy,
2286 .notify_policy = xfrm_send_policy_notify,
2287 .report = xfrm_send_report,
2290 static int __init xfrm_user_init(void)
2294 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2296 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2297 xfrm_netlink_rcv, THIS_MODULE);
2300 rcu_assign_pointer(xfrm_nl, nlsk);
2302 xfrm_register_km(&netlink_mgr);
2307 static void __exit xfrm_user_exit(void)
2309 struct sock *nlsk = xfrm_nl;
2311 xfrm_unregister_km(&netlink_mgr);
2312 rcu_assign_pointer(xfrm_nl, NULL);
2314 sock_release(nlsk->sk_socket);
2317 module_init(xfrm_user_init);
2318 module_exit(xfrm_user_exit);
2319 MODULE_LICENSE("GPL");
2320 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);