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);
535 c.seq = nlh->nlmsg_seq;
536 c.pid = nlh->nlmsg_pid;
537 c.event = nlh->nlmsg_type;
538 km_state_notify(x, &c);
541 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
542 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
547 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
549 memcpy(&p->id, &x->id, sizeof(p->id));
550 memcpy(&p->sel, &x->sel, sizeof(p->sel));
551 memcpy(&p->lft, &x->lft, sizeof(p->lft));
552 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
553 memcpy(&p->stats, &x->stats, sizeof(p->stats));
554 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
555 p->mode = x->props.mode;
556 p->replay_window = x->props.replay_window;
557 p->reqid = x->props.reqid;
558 p->family = x->props.family;
559 p->flags = x->props.flags;
563 struct xfrm_dump_info {
564 struct sk_buff *in_skb;
565 struct sk_buff *out_skb;
572 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
574 struct xfrm_dump_info *sp = ptr;
575 struct sk_buff *in_skb = sp->in_skb;
576 struct sk_buff *skb = sp->out_skb;
577 struct xfrm_usersa_info *p;
578 struct nlmsghdr *nlh;
579 unsigned char *b = skb->tail;
581 if (sp->this_idx < sp->start_idx)
584 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
586 XFRM_MSG_NEWSA, sizeof(*p));
587 nlh->nlmsg_flags = sp->nlmsg_flags;
590 copy_to_user_state(x, p);
593 RTA_PUT(skb, XFRMA_ALG_AUTH,
594 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
596 RTA_PUT(skb, XFRMA_ALG_CRYPT,
597 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
599 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
602 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
605 int ctx_size = sizeof(struct xfrm_sec_ctx) +
606 x->security->ctx_len;
607 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
608 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
610 uctx->exttype = XFRMA_SEC_CTX;
611 uctx->len = ctx_size;
612 uctx->ctx_doi = x->security->ctx_doi;
613 uctx->ctx_alg = x->security->ctx_alg;
614 uctx->ctx_len = x->security->ctx_len;
615 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
619 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
622 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
624 nlh->nlmsg_len = skb->tail - b;
631 skb_trim(skb, b - skb->data);
635 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
637 struct xfrm_dump_info info;
639 info.in_skb = cb->skb;
641 info.nlmsg_seq = cb->nlh->nlmsg_seq;
642 info.nlmsg_flags = NLM_F_MULTI;
644 info.start_idx = cb->args[0];
645 (void) xfrm_state_walk(0, dump_one_state, &info);
646 cb->args[0] = info.this_idx;
651 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
652 struct xfrm_state *x, u32 seq)
654 struct xfrm_dump_info info;
657 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
659 return ERR_PTR(-ENOMEM);
661 info.in_skb = in_skb;
663 info.nlmsg_seq = seq;
664 info.nlmsg_flags = 0;
665 info.this_idx = info.start_idx = 0;
667 if (dump_one_state(x, 0, &info)) {
675 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
676 struct rtattr **xfrma)
678 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
679 struct xfrm_state *x;
680 struct sk_buff *resp_skb;
683 x = xfrm_user_state_lookup(p, xfrma, &err);
687 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
688 if (IS_ERR(resp_skb)) {
689 err = PTR_ERR(resp_skb);
691 err = netlink_unicast(xfrm_nl, resp_skb,
692 NETLINK_CB(skb).pid, MSG_DONTWAIT);
699 static int verify_userspi_info(struct xfrm_userspi_info *p)
701 switch (p->info.id.proto) {
707 /* IPCOMP spi is 16-bits. */
708 if (p->max >= 0x10000)
722 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
723 struct rtattr **xfrma)
725 struct xfrm_state *x;
726 struct xfrm_userspi_info *p;
727 struct sk_buff *resp_skb;
728 xfrm_address_t *daddr;
733 err = verify_userspi_info(p);
737 family = p->info.family;
738 daddr = &p->info.id.daddr;
742 x = xfrm_find_acq_byseq(p->info.seq);
743 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
750 x = xfrm_find_acq(p->info.mode, p->info.reqid,
751 p->info.id.proto, daddr,
758 resp_skb = ERR_PTR(-ENOENT);
760 spin_lock_bh(&x->lock);
761 if (x->km.state != XFRM_STATE_DEAD) {
762 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
764 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
766 spin_unlock_bh(&x->lock);
768 if (IS_ERR(resp_skb)) {
769 err = PTR_ERR(resp_skb);
773 err = netlink_unicast(xfrm_nl, resp_skb,
774 NETLINK_CB(skb).pid, MSG_DONTWAIT);
782 static int verify_policy_dir(u8 dir)
786 case XFRM_POLICY_OUT:
787 case XFRM_POLICY_FWD:
797 static int verify_policy_type(u8 type)
800 case XFRM_POLICY_TYPE_MAIN:
801 #ifdef CONFIG_XFRM_SUB_POLICY
802 case XFRM_POLICY_TYPE_SUB:
813 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
817 case XFRM_SHARE_SESSION:
818 case XFRM_SHARE_USER:
819 case XFRM_SHARE_UNIQUE:
827 case XFRM_POLICY_ALLOW:
828 case XFRM_POLICY_BLOCK:
835 switch (p->sel.family) {
840 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
843 return -EAFNOSUPPORT;
850 return verify_policy_dir(p->dir);
853 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
855 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
856 struct xfrm_user_sec_ctx *uctx;
862 return security_xfrm_policy_alloc(pol, uctx);
865 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
871 for (i = 0; i < nr; i++, ut++) {
872 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
874 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
875 memcpy(&t->saddr, &ut->saddr,
876 sizeof(xfrm_address_t));
877 t->reqid = ut->reqid;
879 t->share = ut->share;
880 t->optional = ut->optional;
881 t->aalgos = ut->aalgos;
882 t->ealgos = ut->ealgos;
883 t->calgos = ut->calgos;
884 t->encap_family = ut->family;
888 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
892 if (nr > XFRM_MAX_DEPTH)
895 for (i = 0; i < nr; i++) {
896 /* We never validated the ut->family value, so many
897 * applications simply leave it at zero. The check was
898 * never made and ut->family was ignored because all
899 * templates could be assumed to have the same family as
900 * the policy itself. Now that we will have ipv4-in-ipv6
901 * and ipv6-in-ipv4 tunnels, this is no longer true.
904 ut[i].family = family;
906 switch (ut[i].family) {
909 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
921 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
923 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
928 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
929 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
932 err = validate_tmpl(nr, utmpl, pol->family);
936 copy_templates(pol, RTA_DATA(rt), nr);
941 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
943 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
944 struct xfrm_userpolicy_type *upt;
945 u8 type = XFRM_POLICY_TYPE_MAIN;
949 if (rt->rta_len < sizeof(*upt))
956 err = verify_policy_type(type);
964 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
966 xp->priority = p->priority;
967 xp->index = p->index;
968 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
969 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
970 xp->action = p->action;
971 xp->flags = p->flags;
972 xp->family = p->sel.family;
973 /* XXX xp->share = p->share; */
976 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
978 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
979 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
980 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
981 p->priority = xp->priority;
982 p->index = xp->index;
983 p->sel.family = xp->family;
985 p->action = xp->action;
986 p->flags = xp->flags;
987 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
990 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
992 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1000 copy_from_user_policy(xp, p);
1002 err = copy_from_user_policy_type(&xp->type, xfrma);
1006 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1007 err = copy_from_user_sec_ctx(xp, xfrma);
1018 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1019 struct rtattr **xfrma)
1021 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1022 struct xfrm_policy *xp;
1027 err = verify_newpolicy_info(p);
1030 err = verify_sec_ctx_len(xfrma);
1034 xp = xfrm_policy_construct(p, xfrma, &err);
1038 /* shouldnt excl be based on nlh flags??
1039 * Aha! this is anti-netlink really i.e more pfkey derived
1040 * in netlink excl is a flag and you wouldnt need
1041 * a type XFRM_MSG_UPDPOLICY - JHS */
1042 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1043 err = xfrm_policy_insert(p->dir, xp, excl);
1044 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1045 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1048 security_xfrm_policy_free(xp);
1053 c.event = nlh->nlmsg_type;
1054 c.seq = nlh->nlmsg_seq;
1055 c.pid = nlh->nlmsg_pid;
1056 km_policy_notify(xp, p->dir, &c);
1063 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1065 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1068 if (xp->xfrm_nr == 0)
1071 for (i = 0; i < xp->xfrm_nr; i++) {
1072 struct xfrm_user_tmpl *up = &vec[i];
1073 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1075 memcpy(&up->id, &kp->id, sizeof(up->id));
1076 up->family = kp->encap_family;
1077 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1078 up->reqid = kp->reqid;
1079 up->mode = kp->mode;
1080 up->share = kp->share;
1081 up->optional = kp->optional;
1082 up->aalgos = kp->aalgos;
1083 up->ealgos = kp->ealgos;
1084 up->calgos = kp->calgos;
1086 RTA_PUT(skb, XFRMA_TMPL,
1087 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1096 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1098 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1099 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1100 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1102 uctx->exttype = XFRMA_SEC_CTX;
1103 uctx->len = ctx_size;
1104 uctx->ctx_doi = s->ctx_doi;
1105 uctx->ctx_alg = s->ctx_alg;
1106 uctx->ctx_len = s->ctx_len;
1107 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1114 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1117 return copy_sec_ctx(x->security, skb);
1122 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1125 return copy_sec_ctx(xp->security, skb);
1130 #ifdef CONFIG_XFRM_SUB_POLICY
1131 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1133 struct xfrm_userpolicy_type upt;
1135 memset(&upt, 0, sizeof(upt));
1138 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1147 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1153 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1155 struct xfrm_dump_info *sp = ptr;
1156 struct xfrm_userpolicy_info *p;
1157 struct sk_buff *in_skb = sp->in_skb;
1158 struct sk_buff *skb = sp->out_skb;
1159 struct nlmsghdr *nlh;
1160 unsigned char *b = skb->tail;
1162 if (sp->this_idx < sp->start_idx)
1165 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1167 XFRM_MSG_NEWPOLICY, sizeof(*p));
1168 p = NLMSG_DATA(nlh);
1169 nlh->nlmsg_flags = sp->nlmsg_flags;
1171 copy_to_user_policy(xp, p, dir);
1172 if (copy_to_user_tmpl(xp, skb) < 0)
1174 if (copy_to_user_sec_ctx(xp, skb))
1176 if (copy_to_user_policy_type(xp->type, skb) < 0)
1179 nlh->nlmsg_len = skb->tail - b;
1185 skb_trim(skb, b - skb->data);
1189 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1191 struct xfrm_dump_info info;
1193 info.in_skb = cb->skb;
1195 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1196 info.nlmsg_flags = NLM_F_MULTI;
1198 info.start_idx = cb->args[0];
1199 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1200 #ifdef CONFIG_XFRM_SUB_POLICY
1201 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1203 cb->args[0] = info.this_idx;
1208 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1209 struct xfrm_policy *xp,
1212 struct xfrm_dump_info info;
1213 struct sk_buff *skb;
1215 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1217 return ERR_PTR(-ENOMEM);
1219 info.in_skb = in_skb;
1221 info.nlmsg_seq = seq;
1222 info.nlmsg_flags = 0;
1223 info.this_idx = info.start_idx = 0;
1225 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1233 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1234 struct rtattr **xfrma)
1236 struct xfrm_policy *xp;
1237 struct xfrm_userpolicy_id *p;
1238 u8 type = XFRM_POLICY_TYPE_MAIN;
1243 p = NLMSG_DATA(nlh);
1244 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1246 err = copy_from_user_policy_type(&type, xfrma);
1250 err = verify_policy_dir(p->dir);
1255 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1257 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1258 struct xfrm_policy tmp;
1260 err = verify_sec_ctx_len(xfrma);
1264 memset(&tmp, 0, sizeof(struct xfrm_policy));
1266 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1268 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1271 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
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 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1291 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1296 c.data.byid = p->index;
1297 c.event = nlh->nlmsg_type;
1298 c.seq = nlh->nlmsg_seq;
1299 c.pid = nlh->nlmsg_pid;
1300 km_policy_notify(xp, p->dir, &c);
1308 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1309 struct rtattr **xfrma)
1312 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1313 struct xfrm_audit audit_info;
1315 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1316 audit_info.secid = NETLINK_CB(skb).sid;
1317 xfrm_state_flush(p->proto, &audit_info);
1318 c.data.proto = p->proto;
1319 c.event = nlh->nlmsg_type;
1320 c.seq = nlh->nlmsg_seq;
1321 c.pid = nlh->nlmsg_pid;
1322 km_state_notify(NULL, &c);
1328 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1330 struct xfrm_aevent_id *id;
1331 struct nlmsghdr *nlh;
1332 struct xfrm_lifetime_cur ltime;
1333 unsigned char *b = skb->tail;
1335 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1336 id = NLMSG_DATA(nlh);
1337 nlh->nlmsg_flags = 0;
1339 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1340 id->sa_id.spi = x->id.spi;
1341 id->sa_id.family = x->props.family;
1342 id->sa_id.proto = x->id.proto;
1343 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1344 id->reqid = x->props.reqid;
1345 id->flags = c->data.aevent;
1347 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1349 ltime.bytes = x->curlft.bytes;
1350 ltime.packets = x->curlft.packets;
1351 ltime.add_time = x->curlft.add_time;
1352 ltime.use_time = x->curlft.use_time;
1354 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1356 if (id->flags&XFRM_AE_RTHR) {
1357 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1360 if (id->flags&XFRM_AE_ETHR) {
1361 u32 etimer = x->replay_maxage*10/HZ;
1362 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1365 nlh->nlmsg_len = skb->tail - b;
1370 skb_trim(skb, b - skb->data);
1374 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1375 struct rtattr **xfrma)
1377 struct xfrm_state *x;
1378 struct sk_buff *r_skb;
1381 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1382 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1383 struct xfrm_usersa_id *id = &p->sa_id;
1385 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1386 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1388 if (p->flags&XFRM_AE_RTHR)
1389 len+=RTA_SPACE(sizeof(u32));
1391 if (p->flags&XFRM_AE_ETHR)
1392 len+=RTA_SPACE(sizeof(u32));
1394 r_skb = alloc_skb(len, GFP_ATOMIC);
1398 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1405 * XXX: is this lock really needed - none of the other
1406 * gets lock (the concern is things getting updated
1407 * while we are still reading) - jhs
1409 spin_lock_bh(&x->lock);
1410 c.data.aevent = p->flags;
1411 c.seq = nlh->nlmsg_seq;
1412 c.pid = nlh->nlmsg_pid;
1414 if (build_aevent(r_skb, x, &c) < 0)
1416 err = netlink_unicast(xfrm_nl, r_skb,
1417 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1418 spin_unlock_bh(&x->lock);
1423 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1424 struct rtattr **xfrma)
1426 struct xfrm_state *x;
1429 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1430 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1431 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1436 /* pedantic mode - thou shalt sayeth replaceth */
1437 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1440 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1444 if (x->km.state != XFRM_STATE_VALID)
1447 spin_lock_bh(&x->lock);
1448 err = xfrm_update_ae_params(x, xfrma);
1449 spin_unlock_bh(&x->lock);
1453 c.event = nlh->nlmsg_type;
1454 c.seq = nlh->nlmsg_seq;
1455 c.pid = nlh->nlmsg_pid;
1456 c.data.aevent = XFRM_AE_CU;
1457 km_state_notify(x, &c);
1464 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1465 struct rtattr **xfrma)
1468 u8 type = XFRM_POLICY_TYPE_MAIN;
1470 struct xfrm_audit audit_info;
1472 err = copy_from_user_policy_type(&type, xfrma);
1476 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1477 audit_info.secid = NETLINK_CB(skb).sid;
1478 xfrm_policy_flush(type, &audit_info);
1480 c.event = nlh->nlmsg_type;
1481 c.seq = nlh->nlmsg_seq;
1482 c.pid = nlh->nlmsg_pid;
1483 km_policy_notify(NULL, 0, &c);
1487 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1488 struct rtattr **xfrma)
1490 struct xfrm_policy *xp;
1491 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1492 struct xfrm_userpolicy_info *p = &up->pol;
1493 u8 type = XFRM_POLICY_TYPE_MAIN;
1496 err = copy_from_user_policy_type(&type, xfrma);
1501 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1503 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1504 struct xfrm_policy tmp;
1506 err = verify_sec_ctx_len(xfrma);
1510 memset(&tmp, 0, sizeof(struct xfrm_policy));
1512 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1514 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1517 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1519 security_xfrm_policy_free(&tmp);
1524 read_lock(&xp->lock);
1526 read_unlock(&xp->lock);
1530 read_unlock(&xp->lock);
1533 xfrm_policy_delete(xp, p->dir);
1534 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1535 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1538 // reset the timers here?
1539 printk("Dont know what to do with soft policy expire\n");
1541 km_policy_expired(xp, p->dir, up->hard, current->pid);
1548 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1549 struct rtattr **xfrma)
1551 struct xfrm_state *x;
1553 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1554 struct xfrm_usersa_info *p = &ue->state;
1556 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1562 spin_lock_bh(&x->lock);
1564 if (x->km.state != XFRM_STATE_VALID)
1566 km_state_expired(x, ue->hard, current->pid);
1569 __xfrm_state_delete(x);
1570 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1571 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1575 spin_unlock_bh(&x->lock);
1580 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1581 struct rtattr **xfrma)
1583 struct xfrm_policy *xp;
1584 struct xfrm_user_tmpl *ut;
1586 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1588 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1589 struct xfrm_state *x = xfrm_state_alloc();
1595 err = verify_newpolicy_info(&ua->policy);
1597 printk("BAD policy passed\n");
1603 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1609 memcpy(&x->id, &ua->id, sizeof(ua->id));
1610 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1611 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1614 /* extract the templates and for each call km_key */
1615 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1616 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1617 memcpy(&x->id, &t->id, sizeof(x->id));
1618 x->props.mode = t->mode;
1619 x->props.reqid = t->reqid;
1620 x->props.family = ut->family;
1621 t->aalgos = ua->aalgos;
1622 t->ealgos = ua->ealgos;
1623 t->calgos = ua->calgos;
1624 err = km_query(x, t, xp);
1634 #ifdef CONFIG_XFRM_MIGRATE
1635 static int verify_user_migrate(struct rtattr **xfrma)
1637 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1638 struct xfrm_user_migrate *um;
1643 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1649 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1650 struct rtattr **xfrma, int *num)
1652 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1653 struct xfrm_user_migrate *um;
1657 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1659 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1662 for (i = 0; i < num_migrate; i++, um++, ma++) {
1663 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1664 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1665 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1666 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1668 ma->proto = um->proto;
1669 ma->mode = um->mode;
1670 ma->reqid = um->reqid;
1672 ma->old_family = um->old_family;
1673 ma->new_family = um->new_family;
1680 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1681 struct rtattr **xfrma)
1683 struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
1684 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1689 err = verify_user_migrate((struct rtattr **)xfrma);
1693 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1697 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1698 (struct rtattr **)xfrma, &n);
1705 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1710 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1711 struct rtattr **xfrma)
1713 return -ENOPROTOOPT;
1717 #ifdef CONFIG_XFRM_MIGRATE
1718 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1720 struct xfrm_user_migrate um;
1722 memset(&um, 0, sizeof(um));
1723 um.proto = m->proto;
1725 um.reqid = m->reqid;
1726 um.old_family = m->old_family;
1727 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1728 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1729 um.new_family = m->new_family;
1730 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1731 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1733 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1740 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1741 int num_migrate, struct xfrm_selector *sel,
1744 struct xfrm_migrate *mp;
1745 struct xfrm_userpolicy_id *pol_id;
1746 struct nlmsghdr *nlh;
1747 unsigned char *b = skb->tail;
1750 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id));
1751 pol_id = NLMSG_DATA(nlh);
1752 nlh->nlmsg_flags = 0;
1754 /* copy data from selector, dir, and type to the pol_id */
1755 memset(pol_id, 0, sizeof(*pol_id));
1756 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1759 if (copy_to_user_policy_type(type, skb) < 0)
1762 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1763 if (copy_to_user_migrate(mp, skb) < 0)
1767 nlh->nlmsg_len = skb->tail - b;
1770 skb_trim(skb, b - skb->data);
1774 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1775 struct xfrm_migrate *m, int num_migrate)
1777 struct sk_buff *skb;
1780 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1781 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1782 #ifdef CONFIG_XFRM_SUB_POLICY
1783 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1785 skb = alloc_skb(len, GFP_ATOMIC);
1790 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1793 NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
1794 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
1798 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1799 struct xfrm_migrate *m, int num_migrate)
1801 return -ENOPROTOOPT;
1805 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1807 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1808 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1809 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1810 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1811 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1812 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1813 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1814 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1815 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1816 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1817 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1818 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1819 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1820 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1821 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1822 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1823 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1824 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1825 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1830 static struct xfrm_link {
1831 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1832 int (*dump)(struct sk_buff *, struct netlink_callback *);
1833 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1834 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1835 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1836 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1837 .dump = xfrm_dump_sa },
1838 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1839 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1840 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1841 .dump = xfrm_dump_policy },
1842 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1843 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1844 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1845 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1846 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1847 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1848 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1849 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1850 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1851 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1852 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1855 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
1857 struct rtattr *xfrma[XFRMA_MAX];
1858 struct xfrm_link *link;
1861 if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
1864 type = nlh->nlmsg_type;
1866 /* A control message: ignore them */
1867 if (type < XFRM_MSG_BASE)
1870 /* Unknown message: reply with EINVAL */
1871 if (type > XFRM_MSG_MAX)
1874 type -= XFRM_MSG_BASE;
1875 link = &xfrm_dispatch[type];
1877 /* All operations require privileges, even GET */
1878 if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
1883 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1884 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1885 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1886 if (link->dump == NULL)
1889 if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh,
1890 link->dump, NULL)) != 0) {
1894 netlink_queue_skip(nlh, skb);
1898 memset(xfrma, 0, sizeof(xfrma));
1900 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1903 if (nlh->nlmsg_len > min_len) {
1904 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1905 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1907 while (RTA_OK(attr, attrlen)) {
1908 unsigned short flavor = attr->rta_type;
1910 if (flavor > XFRMA_MAX)
1912 xfrma[flavor - 1] = attr;
1914 attr = RTA_NEXT(attr, attrlen);
1918 if (link->doit == NULL)
1920 *errp = link->doit(skb, nlh, xfrma);
1929 static void xfrm_netlink_rcv(struct sock *sk, int len)
1931 unsigned int qlen = 0;
1934 mutex_lock(&xfrm_cfg_mutex);
1935 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1936 mutex_unlock(&xfrm_cfg_mutex);
1941 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1943 struct xfrm_user_expire *ue;
1944 struct nlmsghdr *nlh;
1945 unsigned char *b = skb->tail;
1947 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
1949 ue = NLMSG_DATA(nlh);
1950 nlh->nlmsg_flags = 0;
1952 copy_to_user_state(x, &ue->state);
1953 ue->hard = (c->data.hard != 0) ? 1 : 0;
1955 nlh->nlmsg_len = skb->tail - b;
1959 skb_trim(skb, b - skb->data);
1963 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1965 struct sk_buff *skb;
1966 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
1968 skb = alloc_skb(len, GFP_ATOMIC);
1972 if (build_expire(skb, x, c) < 0)
1975 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
1976 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1979 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1981 struct sk_buff *skb;
1982 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1984 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1985 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1986 skb = alloc_skb(len, GFP_ATOMIC);
1990 if (build_aevent(skb, x, c) < 0)
1993 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
1994 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1997 static int xfrm_notify_sa_flush(struct km_event *c)
1999 struct xfrm_usersa_flush *p;
2000 struct nlmsghdr *nlh;
2001 struct sk_buff *skb;
2003 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2005 skb = alloc_skb(len, GFP_ATOMIC);
2010 nlh = NLMSG_PUT(skb, c->pid, c->seq,
2011 XFRM_MSG_FLUSHSA, sizeof(*p));
2012 nlh->nlmsg_flags = 0;
2014 p = NLMSG_DATA(nlh);
2015 p->proto = c->data.proto;
2017 nlh->nlmsg_len = skb->tail - b;
2019 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2020 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2027 static inline int xfrm_sa_len(struct xfrm_state *x)
2031 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2033 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2035 l += RTA_SPACE(sizeof(*x->calg));
2037 l += RTA_SPACE(sizeof(*x->encap));
2042 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2044 struct xfrm_usersa_info *p;
2045 struct xfrm_usersa_id *id;
2046 struct nlmsghdr *nlh;
2047 struct sk_buff *skb;
2049 int len = xfrm_sa_len(x);
2052 headlen = sizeof(*p);
2053 if (c->event == XFRM_MSG_DELSA) {
2054 len += RTA_SPACE(headlen);
2055 headlen = sizeof(*id);
2057 len += NLMSG_SPACE(headlen);
2059 skb = alloc_skb(len, GFP_ATOMIC);
2064 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2065 nlh->nlmsg_flags = 0;
2067 p = NLMSG_DATA(nlh);
2068 if (c->event == XFRM_MSG_DELSA) {
2069 id = NLMSG_DATA(nlh);
2070 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2071 id->spi = x->id.spi;
2072 id->family = x->props.family;
2073 id->proto = x->id.proto;
2075 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2078 copy_to_user_state(x, p);
2081 RTA_PUT(skb, XFRMA_ALG_AUTH,
2082 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2084 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2085 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2087 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2090 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2092 nlh->nlmsg_len = skb->tail - b;
2094 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2095 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2103 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2107 case XFRM_MSG_EXPIRE:
2108 return xfrm_exp_state_notify(x, c);
2109 case XFRM_MSG_NEWAE:
2110 return xfrm_aevent_state_notify(x, c);
2111 case XFRM_MSG_DELSA:
2112 case XFRM_MSG_UPDSA:
2113 case XFRM_MSG_NEWSA:
2114 return xfrm_notify_sa(x, c);
2115 case XFRM_MSG_FLUSHSA:
2116 return xfrm_notify_sa_flush(c);
2118 printk("xfrm_user: Unknown SA event %d\n", c->event);
2126 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2127 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2130 struct xfrm_user_acquire *ua;
2131 struct nlmsghdr *nlh;
2132 unsigned char *b = skb->tail;
2133 __u32 seq = xfrm_get_acqseq();
2135 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
2137 ua = NLMSG_DATA(nlh);
2138 nlh->nlmsg_flags = 0;
2140 memcpy(&ua->id, &x->id, sizeof(ua->id));
2141 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2142 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2143 copy_to_user_policy(xp, &ua->policy, dir);
2144 ua->aalgos = xt->aalgos;
2145 ua->ealgos = xt->ealgos;
2146 ua->calgos = xt->calgos;
2147 ua->seq = x->km.seq = seq;
2149 if (copy_to_user_tmpl(xp, skb) < 0)
2151 if (copy_to_user_state_sec_ctx(x, skb))
2153 if (copy_to_user_policy_type(xp->type, skb) < 0)
2156 nlh->nlmsg_len = skb->tail - b;
2160 skb_trim(skb, b - skb->data);
2164 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2165 struct xfrm_policy *xp, int dir)
2167 struct sk_buff *skb;
2170 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2171 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2172 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2173 #ifdef CONFIG_XFRM_SUB_POLICY
2174 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2176 skb = alloc_skb(len, GFP_ATOMIC);
2180 if (build_acquire(skb, x, xt, xp, dir) < 0)
2183 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2184 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2187 /* User gives us xfrm_user_policy_info followed by an array of 0
2188 * or more templates.
2190 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2191 u8 *data, int len, int *dir)
2193 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2194 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2195 struct xfrm_policy *xp;
2198 switch (sk->sk_family) {
2200 if (opt != IP_XFRM_POLICY) {
2205 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2207 if (opt != IPV6_XFRM_POLICY) {
2220 if (len < sizeof(*p) ||
2221 verify_newpolicy_info(p))
2224 nr = ((len - sizeof(*p)) / sizeof(*ut));
2225 if (validate_tmpl(nr, ut, p->sel.family))
2228 if (p->dir > XFRM_POLICY_OUT)
2231 xp = xfrm_policy_alloc(GFP_KERNEL);
2237 copy_from_user_policy(xp, p);
2238 xp->type = XFRM_POLICY_TYPE_MAIN;
2239 copy_templates(xp, ut, nr);
2246 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2247 int dir, struct km_event *c)
2249 struct xfrm_user_polexpire *upe;
2250 struct nlmsghdr *nlh;
2251 int hard = c->data.hard;
2252 unsigned char *b = skb->tail;
2254 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2255 upe = NLMSG_DATA(nlh);
2256 nlh->nlmsg_flags = 0;
2258 copy_to_user_policy(xp, &upe->pol, dir);
2259 if (copy_to_user_tmpl(xp, skb) < 0)
2261 if (copy_to_user_sec_ctx(xp, skb))
2263 if (copy_to_user_policy_type(xp->type, skb) < 0)
2267 nlh->nlmsg_len = skb->tail - b;
2271 skb_trim(skb, b - skb->data);
2275 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2277 struct sk_buff *skb;
2280 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2281 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2282 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2283 #ifdef CONFIG_XFRM_SUB_POLICY
2284 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2286 skb = alloc_skb(len, GFP_ATOMIC);
2290 if (build_polexpire(skb, xp, dir, c) < 0)
2293 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2294 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2297 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2299 struct xfrm_userpolicy_info *p;
2300 struct xfrm_userpolicy_id *id;
2301 struct nlmsghdr *nlh;
2302 struct sk_buff *skb;
2304 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2307 headlen = sizeof(*p);
2308 if (c->event == XFRM_MSG_DELPOLICY) {
2309 len += RTA_SPACE(headlen);
2310 headlen = sizeof(*id);
2312 #ifdef CONFIG_XFRM_SUB_POLICY
2313 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2315 len += NLMSG_SPACE(headlen);
2317 skb = alloc_skb(len, GFP_ATOMIC);
2322 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2324 p = NLMSG_DATA(nlh);
2325 if (c->event == XFRM_MSG_DELPOLICY) {
2326 id = NLMSG_DATA(nlh);
2327 memset(id, 0, sizeof(*id));
2330 id->index = xp->index;
2332 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2334 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2337 nlh->nlmsg_flags = 0;
2339 copy_to_user_policy(xp, p, dir);
2340 if (copy_to_user_tmpl(xp, skb) < 0)
2342 if (copy_to_user_policy_type(xp->type, skb) < 0)
2345 nlh->nlmsg_len = skb->tail - b;
2347 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2348 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2356 static int xfrm_notify_policy_flush(struct km_event *c)
2358 struct nlmsghdr *nlh;
2359 struct sk_buff *skb;
2362 #ifdef CONFIG_XFRM_SUB_POLICY
2363 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2365 len += NLMSG_LENGTH(0);
2367 skb = alloc_skb(len, GFP_ATOMIC);
2373 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2374 nlh->nlmsg_flags = 0;
2375 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2378 nlh->nlmsg_len = skb->tail - b;
2380 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2381 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2388 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2392 case XFRM_MSG_NEWPOLICY:
2393 case XFRM_MSG_UPDPOLICY:
2394 case XFRM_MSG_DELPOLICY:
2395 return xfrm_notify_policy(xp, dir, c);
2396 case XFRM_MSG_FLUSHPOLICY:
2397 return xfrm_notify_policy_flush(c);
2398 case XFRM_MSG_POLEXPIRE:
2399 return xfrm_exp_policy_notify(xp, dir, c);
2401 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2408 static int build_report(struct sk_buff *skb, u8 proto,
2409 struct xfrm_selector *sel, xfrm_address_t *addr)
2411 struct xfrm_user_report *ur;
2412 struct nlmsghdr *nlh;
2413 unsigned char *b = skb->tail;
2415 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2416 ur = NLMSG_DATA(nlh);
2417 nlh->nlmsg_flags = 0;
2420 memcpy(&ur->sel, sel, sizeof(ur->sel));
2423 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2425 nlh->nlmsg_len = skb->tail - b;
2430 skb_trim(skb, b - skb->data);
2434 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2435 xfrm_address_t *addr)
2437 struct sk_buff *skb;
2440 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2441 skb = alloc_skb(len, GFP_ATOMIC);
2445 if (build_report(skb, proto, sel, addr) < 0)
2448 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2449 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2452 static struct xfrm_mgr netlink_mgr = {
2454 .notify = xfrm_send_state_notify,
2455 .acquire = xfrm_send_acquire,
2456 .compile_policy = xfrm_compile_policy,
2457 .notify_policy = xfrm_send_policy_notify,
2458 .report = xfrm_send_report,
2459 .migrate = xfrm_send_migrate,
2462 static int __init xfrm_user_init(void)
2466 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2468 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2469 xfrm_netlink_rcv, THIS_MODULE);
2472 rcu_assign_pointer(xfrm_nl, nlsk);
2474 xfrm_register_km(&netlink_mgr);
2479 static void __exit xfrm_user_exit(void)
2481 struct sock *nlsk = xfrm_nl;
2483 xfrm_unregister_km(&netlink_mgr);
2484 rcu_assign_pointer(xfrm_nl, NULL);
2486 sock_release(nlsk->sk_socket);
2489 module_init(xfrm_user_init);
2490 module_exit(xfrm_user_exit);
2491 MODULE_LICENSE("GPL");
2492 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);