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_sec_ctx *xfrm_ctx)
280 len += sizeof(struct xfrm_user_sec_ctx);
281 len += xfrm_ctx->ctx_len;
286 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
288 struct xfrm_user_sec_ctx *uctx;
293 uctx = RTA_DATA(u_arg);
294 return security_xfrm_state_alloc(x, uctx);
297 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
299 struct rtattr *rta = u_arg;
300 xfrm_address_t *p, *uaddrp;
305 uaddrp = RTA_DATA(rta);
306 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
314 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
316 memcpy(&x->id, &p->id, sizeof(x->id));
317 memcpy(&x->sel, &p->sel, sizeof(x->sel));
318 memcpy(&x->lft, &p->lft, sizeof(x->lft));
319 x->props.mode = p->mode;
320 x->props.replay_window = p->replay_window;
321 x->props.reqid = p->reqid;
322 x->props.family = p->family;
323 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
324 x->props.flags = p->flags;
328 * someday when pfkey also has support, we could have the code
329 * somehow made shareable and move it to xfrm_state.c - JHS
332 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
335 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
336 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
337 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
338 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
341 struct xfrm_replay_state *replay;
342 if (RTA_PAYLOAD(rp) < sizeof(*replay))
344 replay = RTA_DATA(rp);
345 memcpy(&x->replay, replay, sizeof(*replay));
346 memcpy(&x->preplay, replay, sizeof(*replay));
350 struct xfrm_lifetime_cur *ltime;
351 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
353 ltime = RTA_DATA(lt);
354 x->curlft.bytes = ltime->bytes;
355 x->curlft.packets = ltime->packets;
356 x->curlft.add_time = ltime->add_time;
357 x->curlft.use_time = ltime->use_time;
361 if (RTA_PAYLOAD(et) < sizeof(u32))
363 x->replay_maxage = *(u32*)RTA_DATA(et);
367 if (RTA_PAYLOAD(rt) < sizeof(u32))
369 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
377 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
378 struct rtattr **xfrma,
381 struct xfrm_state *x = xfrm_state_alloc();
387 copy_from_user_state(x, p);
389 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
390 xfrm_aalg_get_byname,
391 xfrma[XFRMA_ALG_AUTH-1])))
393 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
394 xfrm_ealg_get_byname,
395 xfrma[XFRMA_ALG_CRYPT-1])))
397 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
398 xfrm_calg_get_byname,
399 xfrma[XFRMA_ALG_COMP-1])))
401 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
403 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
405 err = xfrm_init_state(x);
409 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
413 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
414 /* sysctl_xfrm_aevent_etime is in 100ms units */
415 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
416 x->preplay.bitmap = 0;
417 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
418 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
420 /* override default values from above */
422 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
429 x->km.state = XFRM_STATE_DEAD;
436 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
437 struct rtattr **xfrma)
439 struct xfrm_usersa_info *p = NLMSG_DATA(nlh);
440 struct xfrm_state *x;
444 err = verify_newsa_info(p, xfrma);
448 x = xfrm_state_construct(p, xfrma, &err);
453 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
454 err = xfrm_state_add(x);
456 err = xfrm_state_update(x);
458 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
459 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
462 x->km.state = XFRM_STATE_DEAD;
467 c.seq = nlh->nlmsg_seq;
468 c.pid = nlh->nlmsg_pid;
469 c.event = nlh->nlmsg_type;
471 km_state_notify(x, &c);
477 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
478 struct rtattr **xfrma,
481 struct xfrm_state *x = NULL;
484 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
486 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
488 xfrm_address_t *saddr = NULL;
490 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
500 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
510 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
511 struct rtattr **xfrma)
513 struct xfrm_state *x;
516 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
518 x = xfrm_user_state_lookup(p, xfrma, &err);
522 if ((err = security_xfrm_state_delete(x)) != 0)
525 if (xfrm_state_kern(x)) {
530 err = xfrm_state_delete(x);
532 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
533 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
538 c.seq = nlh->nlmsg_seq;
539 c.pid = nlh->nlmsg_pid;
540 c.event = nlh->nlmsg_type;
541 km_state_notify(x, &c);
548 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
550 memcpy(&p->id, &x->id, sizeof(p->id));
551 memcpy(&p->sel, &x->sel, sizeof(p->sel));
552 memcpy(&p->lft, &x->lft, sizeof(p->lft));
553 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
554 memcpy(&p->stats, &x->stats, sizeof(p->stats));
555 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
556 p->mode = x->props.mode;
557 p->replay_window = x->props.replay_window;
558 p->reqid = x->props.reqid;
559 p->family = x->props.family;
560 p->flags = x->props.flags;
564 struct xfrm_dump_info {
565 struct sk_buff *in_skb;
566 struct sk_buff *out_skb;
573 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
575 struct xfrm_dump_info *sp = ptr;
576 struct sk_buff *in_skb = sp->in_skb;
577 struct sk_buff *skb = sp->out_skb;
578 struct xfrm_usersa_info *p;
579 struct nlmsghdr *nlh;
580 unsigned char *b = skb->tail;
582 if (sp->this_idx < sp->start_idx)
585 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
587 XFRM_MSG_NEWSA, sizeof(*p));
588 nlh->nlmsg_flags = sp->nlmsg_flags;
591 copy_to_user_state(x, p);
594 RTA_PUT(skb, XFRMA_ALG_AUTH,
595 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
597 RTA_PUT(skb, XFRMA_ALG_CRYPT,
598 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
600 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
603 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
606 int ctx_size = sizeof(struct xfrm_sec_ctx) +
607 x->security->ctx_len;
608 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
609 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
611 uctx->exttype = XFRMA_SEC_CTX;
612 uctx->len = ctx_size;
613 uctx->ctx_doi = x->security->ctx_doi;
614 uctx->ctx_alg = x->security->ctx_alg;
615 uctx->ctx_len = x->security->ctx_len;
616 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
620 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
623 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
625 nlh->nlmsg_len = skb->tail - b;
632 skb_trim(skb, b - skb->data);
636 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
638 struct xfrm_dump_info info;
640 info.in_skb = cb->skb;
642 info.nlmsg_seq = cb->nlh->nlmsg_seq;
643 info.nlmsg_flags = NLM_F_MULTI;
645 info.start_idx = cb->args[0];
646 (void) xfrm_state_walk(0, dump_one_state, &info);
647 cb->args[0] = info.this_idx;
652 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
653 struct xfrm_state *x, u32 seq)
655 struct xfrm_dump_info info;
658 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
660 return ERR_PTR(-ENOMEM);
662 info.in_skb = in_skb;
664 info.nlmsg_seq = seq;
665 info.nlmsg_flags = 0;
666 info.this_idx = info.start_idx = 0;
668 if (dump_one_state(x, 0, &info)) {
676 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
677 struct rtattr **xfrma)
679 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
680 struct xfrm_state *x;
681 struct sk_buff *resp_skb;
684 x = xfrm_user_state_lookup(p, xfrma, &err);
688 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
689 if (IS_ERR(resp_skb)) {
690 err = PTR_ERR(resp_skb);
692 err = netlink_unicast(xfrm_nl, resp_skb,
693 NETLINK_CB(skb).pid, MSG_DONTWAIT);
700 static int verify_userspi_info(struct xfrm_userspi_info *p)
702 switch (p->info.id.proto) {
708 /* IPCOMP spi is 16-bits. */
709 if (p->max >= 0x10000)
723 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
724 struct rtattr **xfrma)
726 struct xfrm_state *x;
727 struct xfrm_userspi_info *p;
728 struct sk_buff *resp_skb;
729 xfrm_address_t *daddr;
734 err = verify_userspi_info(p);
738 family = p->info.family;
739 daddr = &p->info.id.daddr;
743 x = xfrm_find_acq_byseq(p->info.seq);
744 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
751 x = xfrm_find_acq(p->info.mode, p->info.reqid,
752 p->info.id.proto, daddr,
759 resp_skb = ERR_PTR(-ENOENT);
761 spin_lock_bh(&x->lock);
762 if (x->km.state != XFRM_STATE_DEAD) {
763 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
765 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
767 spin_unlock_bh(&x->lock);
769 if (IS_ERR(resp_skb)) {
770 err = PTR_ERR(resp_skb);
774 err = netlink_unicast(xfrm_nl, resp_skb,
775 NETLINK_CB(skb).pid, MSG_DONTWAIT);
783 static int verify_policy_dir(u8 dir)
787 case XFRM_POLICY_OUT:
788 case XFRM_POLICY_FWD:
798 static int verify_policy_type(u8 type)
801 case XFRM_POLICY_TYPE_MAIN:
802 #ifdef CONFIG_XFRM_SUB_POLICY
803 case XFRM_POLICY_TYPE_SUB:
814 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
818 case XFRM_SHARE_SESSION:
819 case XFRM_SHARE_USER:
820 case XFRM_SHARE_UNIQUE:
828 case XFRM_POLICY_ALLOW:
829 case XFRM_POLICY_BLOCK:
836 switch (p->sel.family) {
841 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
844 return -EAFNOSUPPORT;
851 return verify_policy_dir(p->dir);
854 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
856 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
857 struct xfrm_user_sec_ctx *uctx;
863 return security_xfrm_policy_alloc(pol, uctx);
866 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
872 for (i = 0; i < nr; i++, ut++) {
873 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
875 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
876 memcpy(&t->saddr, &ut->saddr,
877 sizeof(xfrm_address_t));
878 t->reqid = ut->reqid;
880 t->share = ut->share;
881 t->optional = ut->optional;
882 t->aalgos = ut->aalgos;
883 t->ealgos = ut->ealgos;
884 t->calgos = ut->calgos;
885 t->encap_family = ut->family;
889 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
893 if (nr > XFRM_MAX_DEPTH)
896 for (i = 0; i < nr; i++) {
897 /* We never validated the ut->family value, so many
898 * applications simply leave it at zero. The check was
899 * never made and ut->family was ignored because all
900 * templates could be assumed to have the same family as
901 * the policy itself. Now that we will have ipv4-in-ipv6
902 * and ipv6-in-ipv4 tunnels, this is no longer true.
905 ut[i].family = family;
907 switch (ut[i].family) {
910 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
922 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
924 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
929 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
930 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
933 err = validate_tmpl(nr, utmpl, pol->family);
937 copy_templates(pol, RTA_DATA(rt), nr);
942 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
944 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
945 struct xfrm_userpolicy_type *upt;
946 u8 type = XFRM_POLICY_TYPE_MAIN;
950 if (rt->rta_len < sizeof(*upt))
957 err = verify_policy_type(type);
965 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
967 xp->priority = p->priority;
968 xp->index = p->index;
969 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
970 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
971 xp->action = p->action;
972 xp->flags = p->flags;
973 xp->family = p->sel.family;
974 /* XXX xp->share = p->share; */
977 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
979 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
980 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
981 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
982 p->priority = xp->priority;
983 p->index = xp->index;
984 p->sel.family = xp->family;
986 p->action = xp->action;
987 p->flags = xp->flags;
988 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
991 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
993 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1001 copy_from_user_policy(xp, p);
1003 err = copy_from_user_policy_type(&xp->type, xfrma);
1007 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1008 err = copy_from_user_sec_ctx(xp, xfrma);
1019 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1020 struct rtattr **xfrma)
1022 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1023 struct xfrm_policy *xp;
1028 err = verify_newpolicy_info(p);
1031 err = verify_sec_ctx_len(xfrma);
1035 xp = xfrm_policy_construct(p, xfrma, &err);
1039 /* shouldnt excl be based on nlh flags??
1040 * Aha! this is anti-netlink really i.e more pfkey derived
1041 * in netlink excl is a flag and you wouldnt need
1042 * a type XFRM_MSG_UPDPOLICY - JHS */
1043 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1044 err = xfrm_policy_insert(p->dir, xp, excl);
1045 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1046 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1049 security_xfrm_policy_free(xp);
1054 c.event = nlh->nlmsg_type;
1055 c.seq = nlh->nlmsg_seq;
1056 c.pid = nlh->nlmsg_pid;
1057 km_policy_notify(xp, p->dir, &c);
1064 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1066 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1069 if (xp->xfrm_nr == 0)
1072 for (i = 0; i < xp->xfrm_nr; i++) {
1073 struct xfrm_user_tmpl *up = &vec[i];
1074 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1076 memcpy(&up->id, &kp->id, sizeof(up->id));
1077 up->family = kp->encap_family;
1078 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1079 up->reqid = kp->reqid;
1080 up->mode = kp->mode;
1081 up->share = kp->share;
1082 up->optional = kp->optional;
1083 up->aalgos = kp->aalgos;
1084 up->ealgos = kp->ealgos;
1085 up->calgos = kp->calgos;
1087 RTA_PUT(skb, XFRMA_TMPL,
1088 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1097 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1099 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1100 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1101 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1103 uctx->exttype = XFRMA_SEC_CTX;
1104 uctx->len = ctx_size;
1105 uctx->ctx_doi = s->ctx_doi;
1106 uctx->ctx_alg = s->ctx_alg;
1107 uctx->ctx_len = s->ctx_len;
1108 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1115 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1118 return copy_sec_ctx(x->security, skb);
1123 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1126 return copy_sec_ctx(xp->security, skb);
1131 #ifdef CONFIG_XFRM_SUB_POLICY
1132 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1134 struct xfrm_userpolicy_type upt;
1136 memset(&upt, 0, sizeof(upt));
1139 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1148 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1154 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1156 struct xfrm_dump_info *sp = ptr;
1157 struct xfrm_userpolicy_info *p;
1158 struct sk_buff *in_skb = sp->in_skb;
1159 struct sk_buff *skb = sp->out_skb;
1160 struct nlmsghdr *nlh;
1161 unsigned char *b = skb->tail;
1163 if (sp->this_idx < sp->start_idx)
1166 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1168 XFRM_MSG_NEWPOLICY, sizeof(*p));
1169 p = NLMSG_DATA(nlh);
1170 nlh->nlmsg_flags = sp->nlmsg_flags;
1172 copy_to_user_policy(xp, p, dir);
1173 if (copy_to_user_tmpl(xp, skb) < 0)
1175 if (copy_to_user_sec_ctx(xp, skb))
1177 if (copy_to_user_policy_type(xp->type, skb) < 0)
1180 nlh->nlmsg_len = skb->tail - b;
1186 skb_trim(skb, b - skb->data);
1190 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1192 struct xfrm_dump_info info;
1194 info.in_skb = cb->skb;
1196 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1197 info.nlmsg_flags = NLM_F_MULTI;
1199 info.start_idx = cb->args[0];
1200 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1201 #ifdef CONFIG_XFRM_SUB_POLICY
1202 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1204 cb->args[0] = info.this_idx;
1209 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1210 struct xfrm_policy *xp,
1213 struct xfrm_dump_info info;
1214 struct sk_buff *skb;
1216 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1218 return ERR_PTR(-ENOMEM);
1220 info.in_skb = in_skb;
1222 info.nlmsg_seq = seq;
1223 info.nlmsg_flags = 0;
1224 info.this_idx = info.start_idx = 0;
1226 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1234 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1235 struct rtattr **xfrma)
1237 struct xfrm_policy *xp;
1238 struct xfrm_userpolicy_id *p;
1239 u8 type = XFRM_POLICY_TYPE_MAIN;
1244 p = NLMSG_DATA(nlh);
1245 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1247 err = copy_from_user_policy_type(&type, xfrma);
1251 err = verify_policy_dir(p->dir);
1256 xp = xfrm_policy_byid(type, p->dir, p->index, delete);
1258 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1259 struct xfrm_policy tmp;
1261 err = verify_sec_ctx_len(xfrma);
1265 memset(&tmp, 0, sizeof(struct xfrm_policy));
1267 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1269 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1272 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, delete);
1273 security_xfrm_policy_free(&tmp);
1279 struct sk_buff *resp_skb;
1281 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1282 if (IS_ERR(resp_skb)) {
1283 err = PTR_ERR(resp_skb);
1285 err = netlink_unicast(xfrm_nl, resp_skb,
1286 NETLINK_CB(skb).pid,
1290 err = security_xfrm_policy_delete(xp);
1292 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1293 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1298 c.data.byid = p->index;
1299 c.event = nlh->nlmsg_type;
1300 c.seq = nlh->nlmsg_seq;
1301 c.pid = nlh->nlmsg_pid;
1302 km_policy_notify(xp, p->dir, &c);
1311 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1312 struct rtattr **xfrma)
1315 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1316 struct xfrm_audit audit_info;
1318 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1319 audit_info.secid = NETLINK_CB(skb).sid;
1320 xfrm_state_flush(p->proto, &audit_info);
1321 c.data.proto = p->proto;
1322 c.event = nlh->nlmsg_type;
1323 c.seq = nlh->nlmsg_seq;
1324 c.pid = nlh->nlmsg_pid;
1325 km_state_notify(NULL, &c);
1331 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1333 struct xfrm_aevent_id *id;
1334 struct nlmsghdr *nlh;
1335 struct xfrm_lifetime_cur ltime;
1336 unsigned char *b = skb->tail;
1338 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1339 id = NLMSG_DATA(nlh);
1340 nlh->nlmsg_flags = 0;
1342 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1343 id->sa_id.spi = x->id.spi;
1344 id->sa_id.family = x->props.family;
1345 id->sa_id.proto = x->id.proto;
1346 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1347 id->reqid = x->props.reqid;
1348 id->flags = c->data.aevent;
1350 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1352 ltime.bytes = x->curlft.bytes;
1353 ltime.packets = x->curlft.packets;
1354 ltime.add_time = x->curlft.add_time;
1355 ltime.use_time = x->curlft.use_time;
1357 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1359 if (id->flags&XFRM_AE_RTHR) {
1360 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1363 if (id->flags&XFRM_AE_ETHR) {
1364 u32 etimer = x->replay_maxage*10/HZ;
1365 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1368 nlh->nlmsg_len = skb->tail - b;
1373 skb_trim(skb, b - skb->data);
1377 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1378 struct rtattr **xfrma)
1380 struct xfrm_state *x;
1381 struct sk_buff *r_skb;
1384 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1385 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1386 struct xfrm_usersa_id *id = &p->sa_id;
1388 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1389 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1391 if (p->flags&XFRM_AE_RTHR)
1392 len+=RTA_SPACE(sizeof(u32));
1394 if (p->flags&XFRM_AE_ETHR)
1395 len+=RTA_SPACE(sizeof(u32));
1397 r_skb = alloc_skb(len, GFP_ATOMIC);
1401 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1408 * XXX: is this lock really needed - none of the other
1409 * gets lock (the concern is things getting updated
1410 * while we are still reading) - jhs
1412 spin_lock_bh(&x->lock);
1413 c.data.aevent = p->flags;
1414 c.seq = nlh->nlmsg_seq;
1415 c.pid = nlh->nlmsg_pid;
1417 if (build_aevent(r_skb, x, &c) < 0)
1419 err = netlink_unicast(xfrm_nl, r_skb,
1420 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1421 spin_unlock_bh(&x->lock);
1426 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1427 struct rtattr **xfrma)
1429 struct xfrm_state *x;
1432 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1433 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1434 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1439 /* pedantic mode - thou shalt sayeth replaceth */
1440 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1443 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1447 if (x->km.state != XFRM_STATE_VALID)
1450 spin_lock_bh(&x->lock);
1451 err = xfrm_update_ae_params(x, xfrma);
1452 spin_unlock_bh(&x->lock);
1456 c.event = nlh->nlmsg_type;
1457 c.seq = nlh->nlmsg_seq;
1458 c.pid = nlh->nlmsg_pid;
1459 c.data.aevent = XFRM_AE_CU;
1460 km_state_notify(x, &c);
1467 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1468 struct rtattr **xfrma)
1471 u8 type = XFRM_POLICY_TYPE_MAIN;
1473 struct xfrm_audit audit_info;
1475 err = copy_from_user_policy_type(&type, xfrma);
1479 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1480 audit_info.secid = NETLINK_CB(skb).sid;
1481 xfrm_policy_flush(type, &audit_info);
1483 c.event = nlh->nlmsg_type;
1484 c.seq = nlh->nlmsg_seq;
1485 c.pid = nlh->nlmsg_pid;
1486 km_policy_notify(NULL, 0, &c);
1490 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1491 struct rtattr **xfrma)
1493 struct xfrm_policy *xp;
1494 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1495 struct xfrm_userpolicy_info *p = &up->pol;
1496 u8 type = XFRM_POLICY_TYPE_MAIN;
1499 err = copy_from_user_policy_type(&type, xfrma);
1504 xp = xfrm_policy_byid(type, p->dir, p->index, 0);
1506 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1507 struct xfrm_policy tmp;
1509 err = verify_sec_ctx_len(xfrma);
1513 memset(&tmp, 0, sizeof(struct xfrm_policy));
1515 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1517 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1520 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, 0);
1521 security_xfrm_policy_free(&tmp);
1526 read_lock(&xp->lock);
1528 read_unlock(&xp->lock);
1532 read_unlock(&xp->lock);
1535 xfrm_policy_delete(xp, p->dir);
1536 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1537 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1540 // reset the timers here?
1541 printk("Dont know what to do with soft policy expire\n");
1543 km_policy_expired(xp, p->dir, up->hard, current->pid);
1550 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1551 struct rtattr **xfrma)
1553 struct xfrm_state *x;
1555 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1556 struct xfrm_usersa_info *p = &ue->state;
1558 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1564 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);
1577 spin_unlock_bh(&x->lock);
1582 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1583 struct rtattr **xfrma)
1585 struct xfrm_policy *xp;
1586 struct xfrm_user_tmpl *ut;
1588 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1590 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1591 struct xfrm_state *x = xfrm_state_alloc();
1597 err = verify_newpolicy_info(&ua->policy);
1599 printk("BAD policy passed\n");
1605 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1611 memcpy(&x->id, &ua->id, sizeof(ua->id));
1612 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1613 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1616 /* extract the templates and for each call km_key */
1617 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1618 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1619 memcpy(&x->id, &t->id, sizeof(x->id));
1620 x->props.mode = t->mode;
1621 x->props.reqid = t->reqid;
1622 x->props.family = ut->family;
1623 t->aalgos = ua->aalgos;
1624 t->ealgos = ua->ealgos;
1625 t->calgos = ua->calgos;
1626 err = km_query(x, t, xp);
1637 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1639 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1640 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1641 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1642 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1643 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1644 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1645 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1646 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1647 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1648 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1649 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1650 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1651 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1652 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1653 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1654 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1655 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1656 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1661 static struct xfrm_link {
1662 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1663 int (*dump)(struct sk_buff *, struct netlink_callback *);
1664 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1665 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1666 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1667 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1668 .dump = xfrm_dump_sa },
1669 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1670 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1671 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1672 .dump = xfrm_dump_policy },
1673 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1674 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1675 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1676 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1677 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1678 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1679 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1680 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1681 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1682 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1685 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
1687 struct rtattr *xfrma[XFRMA_MAX];
1688 struct xfrm_link *link;
1691 if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
1694 type = nlh->nlmsg_type;
1696 /* A control message: ignore them */
1697 if (type < XFRM_MSG_BASE)
1700 /* Unknown message: reply with EINVAL */
1701 if (type > XFRM_MSG_MAX)
1704 type -= XFRM_MSG_BASE;
1705 link = &xfrm_dispatch[type];
1707 /* All operations require privileges, even GET */
1708 if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
1713 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1714 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1715 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1716 if (link->dump == NULL)
1719 if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh,
1720 link->dump, NULL)) != 0) {
1724 netlink_queue_skip(nlh, skb);
1728 memset(xfrma, 0, sizeof(xfrma));
1730 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1733 if (nlh->nlmsg_len > min_len) {
1734 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1735 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1737 while (RTA_OK(attr, attrlen)) {
1738 unsigned short flavor = attr->rta_type;
1740 if (flavor > XFRMA_MAX)
1742 xfrma[flavor - 1] = attr;
1744 attr = RTA_NEXT(attr, attrlen);
1748 if (link->doit == NULL)
1750 *errp = link->doit(skb, nlh, xfrma);
1759 static void xfrm_netlink_rcv(struct sock *sk, int len)
1761 unsigned int qlen = 0;
1764 mutex_lock(&xfrm_cfg_mutex);
1765 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1766 mutex_unlock(&xfrm_cfg_mutex);
1771 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1773 struct xfrm_user_expire *ue;
1774 struct nlmsghdr *nlh;
1775 unsigned char *b = skb->tail;
1777 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
1779 ue = NLMSG_DATA(nlh);
1780 nlh->nlmsg_flags = 0;
1782 copy_to_user_state(x, &ue->state);
1783 ue->hard = (c->data.hard != 0) ? 1 : 0;
1785 nlh->nlmsg_len = skb->tail - b;
1789 skb_trim(skb, b - skb->data);
1793 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1795 struct sk_buff *skb;
1796 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
1798 skb = alloc_skb(len, GFP_ATOMIC);
1802 if (build_expire(skb, x, c) < 0)
1805 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
1806 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1809 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1811 struct sk_buff *skb;
1812 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1814 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1815 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1816 skb = alloc_skb(len, GFP_ATOMIC);
1820 if (build_aevent(skb, x, c) < 0)
1823 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
1824 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1827 static int xfrm_notify_sa_flush(struct km_event *c)
1829 struct xfrm_usersa_flush *p;
1830 struct nlmsghdr *nlh;
1831 struct sk_buff *skb;
1833 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
1835 skb = alloc_skb(len, GFP_ATOMIC);
1840 nlh = NLMSG_PUT(skb, c->pid, c->seq,
1841 XFRM_MSG_FLUSHSA, sizeof(*p));
1842 nlh->nlmsg_flags = 0;
1844 p = NLMSG_DATA(nlh);
1845 p->proto = c->data.proto;
1847 nlh->nlmsg_len = skb->tail - b;
1849 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
1850 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1857 static int inline xfrm_sa_len(struct xfrm_state *x)
1861 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
1863 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
1865 l += RTA_SPACE(sizeof(*x->calg));
1867 l += RTA_SPACE(sizeof(*x->encap));
1872 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
1874 struct xfrm_usersa_info *p;
1875 struct xfrm_usersa_id *id;
1876 struct nlmsghdr *nlh;
1877 struct sk_buff *skb;
1879 int len = xfrm_sa_len(x);
1882 headlen = sizeof(*p);
1883 if (c->event == XFRM_MSG_DELSA) {
1884 len += RTA_SPACE(headlen);
1885 headlen = sizeof(*id);
1887 len += NLMSG_SPACE(headlen);
1889 skb = alloc_skb(len, GFP_ATOMIC);
1894 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
1895 nlh->nlmsg_flags = 0;
1897 p = NLMSG_DATA(nlh);
1898 if (c->event == XFRM_MSG_DELSA) {
1899 id = NLMSG_DATA(nlh);
1900 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
1901 id->spi = x->id.spi;
1902 id->family = x->props.family;
1903 id->proto = x->id.proto;
1905 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
1908 copy_to_user_state(x, p);
1911 RTA_PUT(skb, XFRMA_ALG_AUTH,
1912 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
1914 RTA_PUT(skb, XFRMA_ALG_CRYPT,
1915 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
1917 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1920 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1922 nlh->nlmsg_len = skb->tail - b;
1924 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
1925 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1933 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
1937 case XFRM_MSG_EXPIRE:
1938 return xfrm_exp_state_notify(x, c);
1939 case XFRM_MSG_NEWAE:
1940 return xfrm_aevent_state_notify(x, c);
1941 case XFRM_MSG_DELSA:
1942 case XFRM_MSG_UPDSA:
1943 case XFRM_MSG_NEWSA:
1944 return xfrm_notify_sa(x, c);
1945 case XFRM_MSG_FLUSHSA:
1946 return xfrm_notify_sa_flush(c);
1948 printk("xfrm_user: Unknown SA event %d\n", c->event);
1956 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
1957 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
1960 struct xfrm_user_acquire *ua;
1961 struct nlmsghdr *nlh;
1962 unsigned char *b = skb->tail;
1963 __u32 seq = xfrm_get_acqseq();
1965 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
1967 ua = NLMSG_DATA(nlh);
1968 nlh->nlmsg_flags = 0;
1970 memcpy(&ua->id, &x->id, sizeof(ua->id));
1971 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
1972 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
1973 copy_to_user_policy(xp, &ua->policy, dir);
1974 ua->aalgos = xt->aalgos;
1975 ua->ealgos = xt->ealgos;
1976 ua->calgos = xt->calgos;
1977 ua->seq = x->km.seq = seq;
1979 if (copy_to_user_tmpl(xp, skb) < 0)
1981 if (copy_to_user_state_sec_ctx(x, skb))
1983 if (copy_to_user_policy_type(xp->type, skb) < 0)
1986 nlh->nlmsg_len = skb->tail - b;
1990 skb_trim(skb, b - skb->data);
1994 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
1995 struct xfrm_policy *xp, int dir)
1997 struct sk_buff *skb;
2000 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2001 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2002 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2003 #ifdef CONFIG_XFRM_SUB_POLICY
2004 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2006 skb = alloc_skb(len, GFP_ATOMIC);
2010 if (build_acquire(skb, x, xt, xp, dir) < 0)
2013 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2014 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2017 /* User gives us xfrm_user_policy_info followed by an array of 0
2018 * or more templates.
2020 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2021 u8 *data, int len, int *dir)
2023 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2024 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2025 struct xfrm_policy *xp;
2028 switch (sk->sk_family) {
2030 if (opt != IP_XFRM_POLICY) {
2035 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2037 if (opt != IPV6_XFRM_POLICY) {
2050 if (len < sizeof(*p) ||
2051 verify_newpolicy_info(p))
2054 nr = ((len - sizeof(*p)) / sizeof(*ut));
2055 if (validate_tmpl(nr, ut, p->sel.family))
2058 if (p->dir > XFRM_POLICY_OUT)
2061 xp = xfrm_policy_alloc(GFP_KERNEL);
2067 copy_from_user_policy(xp, p);
2068 xp->type = XFRM_POLICY_TYPE_MAIN;
2069 copy_templates(xp, ut, nr);
2076 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2077 int dir, struct km_event *c)
2079 struct xfrm_user_polexpire *upe;
2080 struct nlmsghdr *nlh;
2081 int hard = c->data.hard;
2082 unsigned char *b = skb->tail;
2084 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2085 upe = NLMSG_DATA(nlh);
2086 nlh->nlmsg_flags = 0;
2088 copy_to_user_policy(xp, &upe->pol, dir);
2089 if (copy_to_user_tmpl(xp, skb) < 0)
2091 if (copy_to_user_sec_ctx(xp, skb))
2093 if (copy_to_user_policy_type(xp->type, skb) < 0)
2097 nlh->nlmsg_len = skb->tail - b;
2101 skb_trim(skb, b - skb->data);
2105 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2107 struct sk_buff *skb;
2110 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2111 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2112 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2113 #ifdef CONFIG_XFRM_SUB_POLICY
2114 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2116 skb = alloc_skb(len, GFP_ATOMIC);
2120 if (build_polexpire(skb, xp, dir, c) < 0)
2123 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2124 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2127 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2129 struct xfrm_userpolicy_info *p;
2130 struct xfrm_userpolicy_id *id;
2131 struct nlmsghdr *nlh;
2132 struct sk_buff *skb;
2134 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2137 headlen = sizeof(*p);
2138 if (c->event == XFRM_MSG_DELPOLICY) {
2139 len += RTA_SPACE(headlen);
2140 headlen = sizeof(*id);
2142 #ifdef CONFIG_XFRM_SUB_POLICY
2143 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2145 len += NLMSG_SPACE(headlen);
2147 skb = alloc_skb(len, GFP_ATOMIC);
2152 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2154 p = NLMSG_DATA(nlh);
2155 if (c->event == XFRM_MSG_DELPOLICY) {
2156 id = NLMSG_DATA(nlh);
2157 memset(id, 0, sizeof(*id));
2160 id->index = xp->index;
2162 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2164 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2167 nlh->nlmsg_flags = 0;
2169 copy_to_user_policy(xp, p, dir);
2170 if (copy_to_user_tmpl(xp, skb) < 0)
2172 if (copy_to_user_policy_type(xp->type, skb) < 0)
2175 nlh->nlmsg_len = skb->tail - b;
2177 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2178 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2186 static int xfrm_notify_policy_flush(struct km_event *c)
2188 struct nlmsghdr *nlh;
2189 struct sk_buff *skb;
2192 #ifdef CONFIG_XFRM_SUB_POLICY
2193 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2195 len += NLMSG_LENGTH(0);
2197 skb = alloc_skb(len, GFP_ATOMIC);
2203 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2204 nlh->nlmsg_flags = 0;
2205 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2208 nlh->nlmsg_len = skb->tail - b;
2210 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2211 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2218 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2222 case XFRM_MSG_NEWPOLICY:
2223 case XFRM_MSG_UPDPOLICY:
2224 case XFRM_MSG_DELPOLICY:
2225 return xfrm_notify_policy(xp, dir, c);
2226 case XFRM_MSG_FLUSHPOLICY:
2227 return xfrm_notify_policy_flush(c);
2228 case XFRM_MSG_POLEXPIRE:
2229 return xfrm_exp_policy_notify(xp, dir, c);
2231 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2238 static int build_report(struct sk_buff *skb, u8 proto,
2239 struct xfrm_selector *sel, xfrm_address_t *addr)
2241 struct xfrm_user_report *ur;
2242 struct nlmsghdr *nlh;
2243 unsigned char *b = skb->tail;
2245 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2246 ur = NLMSG_DATA(nlh);
2247 nlh->nlmsg_flags = 0;
2250 memcpy(&ur->sel, sel, sizeof(ur->sel));
2253 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2255 nlh->nlmsg_len = skb->tail - b;
2260 skb_trim(skb, b - skb->data);
2264 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2265 xfrm_address_t *addr)
2267 struct sk_buff *skb;
2270 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2271 skb = alloc_skb(len, GFP_ATOMIC);
2275 if (build_report(skb, proto, sel, addr) < 0)
2278 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2279 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2282 static struct xfrm_mgr netlink_mgr = {
2284 .notify = xfrm_send_state_notify,
2285 .acquire = xfrm_send_acquire,
2286 .compile_policy = xfrm_compile_policy,
2287 .notify_policy = xfrm_send_policy_notify,
2288 .report = xfrm_send_report,
2291 static int __init xfrm_user_init(void)
2295 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2297 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2298 xfrm_netlink_rcv, THIS_MODULE);
2301 rcu_assign_pointer(xfrm_nl, nlsk);
2303 xfrm_register_km(&netlink_mgr);
2308 static void __exit xfrm_user_exit(void)
2310 struct sock *nlsk = xfrm_nl;
2312 xfrm_unregister_km(&netlink_mgr);
2313 rcu_assign_pointer(xfrm_nl, NULL);
2315 sock_release(nlsk->sk_socket);
2318 module_init(xfrm_user_init);
2319 module_exit(xfrm_user_exit);
2320 MODULE_LICENSE("GPL");
2321 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);