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;
327 * Set inner address family if the KM left it as zero.
328 * See comment in validate_tmpl.
331 x->sel.family = p->family;
335 * someday when pfkey also has support, we could have the code
336 * somehow made shareable and move it to xfrm_state.c - JHS
339 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
342 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
343 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
344 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
345 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
348 struct xfrm_replay_state *replay;
349 if (RTA_PAYLOAD(rp) < sizeof(*replay))
351 replay = RTA_DATA(rp);
352 memcpy(&x->replay, replay, sizeof(*replay));
353 memcpy(&x->preplay, replay, sizeof(*replay));
357 struct xfrm_lifetime_cur *ltime;
358 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
360 ltime = RTA_DATA(lt);
361 x->curlft.bytes = ltime->bytes;
362 x->curlft.packets = ltime->packets;
363 x->curlft.add_time = ltime->add_time;
364 x->curlft.use_time = ltime->use_time;
368 if (RTA_PAYLOAD(et) < sizeof(u32))
370 x->replay_maxage = *(u32*)RTA_DATA(et);
374 if (RTA_PAYLOAD(rt) < sizeof(u32))
376 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
384 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
385 struct rtattr **xfrma,
388 struct xfrm_state *x = xfrm_state_alloc();
394 copy_from_user_state(x, p);
396 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
397 xfrm_aalg_get_byname,
398 xfrma[XFRMA_ALG_AUTH-1])))
400 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
401 xfrm_ealg_get_byname,
402 xfrma[XFRMA_ALG_CRYPT-1])))
404 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
405 xfrm_calg_get_byname,
406 xfrma[XFRMA_ALG_COMP-1])))
408 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
410 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
412 err = xfrm_init_state(x);
416 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
420 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
421 /* sysctl_xfrm_aevent_etime is in 100ms units */
422 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
423 x->preplay.bitmap = 0;
424 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
425 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
427 /* override default values from above */
429 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
436 x->km.state = XFRM_STATE_DEAD;
443 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
444 struct rtattr **xfrma)
446 struct xfrm_usersa_info *p = nlmsg_data(nlh);
447 struct xfrm_state *x;
451 err = verify_newsa_info(p, xfrma);
455 x = xfrm_state_construct(p, xfrma, &err);
460 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
461 err = xfrm_state_add(x);
463 err = xfrm_state_update(x);
465 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
466 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
469 x->km.state = XFRM_STATE_DEAD;
474 c.seq = nlh->nlmsg_seq;
475 c.pid = nlh->nlmsg_pid;
476 c.event = nlh->nlmsg_type;
478 km_state_notify(x, &c);
484 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
485 struct rtattr **xfrma,
488 struct xfrm_state *x = NULL;
491 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
493 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
495 xfrm_address_t *saddr = NULL;
497 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
507 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
517 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
518 struct rtattr **xfrma)
520 struct xfrm_state *x;
523 struct xfrm_usersa_id *p = nlmsg_data(nlh);
525 x = xfrm_user_state_lookup(p, xfrma, &err);
529 if ((err = security_xfrm_state_delete(x)) != 0)
532 if (xfrm_state_kern(x)) {
537 err = xfrm_state_delete(x);
542 c.seq = nlh->nlmsg_seq;
543 c.pid = nlh->nlmsg_pid;
544 c.event = nlh->nlmsg_type;
545 km_state_notify(x, &c);
548 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
549 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
554 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
556 memcpy(&p->id, &x->id, sizeof(p->id));
557 memcpy(&p->sel, &x->sel, sizeof(p->sel));
558 memcpy(&p->lft, &x->lft, sizeof(p->lft));
559 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
560 memcpy(&p->stats, &x->stats, sizeof(p->stats));
561 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
562 p->mode = x->props.mode;
563 p->replay_window = x->props.replay_window;
564 p->reqid = x->props.reqid;
565 p->family = x->props.family;
566 p->flags = x->props.flags;
570 struct xfrm_dump_info {
571 struct sk_buff *in_skb;
572 struct sk_buff *out_skb;
579 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
581 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
582 struct xfrm_user_sec_ctx *uctx;
585 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
589 uctx = nla_data(attr);
590 uctx->exttype = XFRMA_SEC_CTX;
591 uctx->len = ctx_size;
592 uctx->ctx_doi = s->ctx_doi;
593 uctx->ctx_alg = s->ctx_alg;
594 uctx->ctx_len = s->ctx_len;
595 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
600 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
602 struct xfrm_dump_info *sp = ptr;
603 struct sk_buff *in_skb = sp->in_skb;
604 struct sk_buff *skb = sp->out_skb;
605 struct xfrm_usersa_info *p;
606 struct nlmsghdr *nlh;
608 if (sp->this_idx < sp->start_idx)
611 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
612 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
617 copy_to_user_state(x, p);
620 NLA_PUT(skb, XFRMA_ALG_AUTH,
621 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
623 NLA_PUT(skb, XFRMA_ALG_CRYPT,
624 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
626 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
629 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
631 if (x->security && copy_sec_ctx(x->security, skb) < 0)
632 goto nla_put_failure;
635 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
638 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
646 nlmsg_cancel(skb, nlh);
650 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
652 struct xfrm_dump_info info;
654 info.in_skb = cb->skb;
656 info.nlmsg_seq = cb->nlh->nlmsg_seq;
657 info.nlmsg_flags = NLM_F_MULTI;
659 info.start_idx = cb->args[0];
660 (void) xfrm_state_walk(0, dump_one_state, &info);
661 cb->args[0] = info.this_idx;
666 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
667 struct xfrm_state *x, u32 seq)
669 struct xfrm_dump_info info;
672 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
674 return ERR_PTR(-ENOMEM);
676 info.in_skb = in_skb;
678 info.nlmsg_seq = seq;
679 info.nlmsg_flags = 0;
680 info.this_idx = info.start_idx = 0;
682 if (dump_one_state(x, 0, &info)) {
690 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
692 struct xfrmk_spdinfo si;
693 struct xfrmu_spdinfo spc;
694 struct xfrmu_spdhinfo sph;
695 struct nlmsghdr *nlh;
698 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
699 if (nlh == NULL) /* shouldnt really happen ... */
704 xfrm_spd_getinfo(&si);
705 spc.incnt = si.incnt;
706 spc.outcnt = si.outcnt;
707 spc.fwdcnt = si.fwdcnt;
708 spc.inscnt = si.inscnt;
709 spc.outscnt = si.outscnt;
710 spc.fwdscnt = si.fwdscnt;
711 sph.spdhcnt = si.spdhcnt;
712 sph.spdhmcnt = si.spdhmcnt;
714 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
715 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
717 return nlmsg_end(skb, nlh);
720 nlmsg_cancel(skb, nlh);
724 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
725 struct rtattr **xfrma)
727 struct sk_buff *r_skb;
728 u32 *flags = nlmsg_data(nlh);
729 u32 spid = NETLINK_CB(skb).pid;
730 u32 seq = nlh->nlmsg_seq;
731 int len = NLMSG_LENGTH(sizeof(u32));
733 len += RTA_SPACE(sizeof(struct xfrmu_spdinfo));
734 len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo));
736 r_skb = alloc_skb(len, GFP_ATOMIC);
740 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
743 return nlmsg_unicast(xfrm_nl, r_skb, spid);
746 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
748 struct xfrmk_sadinfo si;
749 struct xfrmu_sadhinfo sh;
750 struct nlmsghdr *nlh;
753 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
754 if (nlh == NULL) /* shouldnt really happen ... */
759 xfrm_sad_getinfo(&si);
761 sh.sadhmcnt = si.sadhmcnt;
762 sh.sadhcnt = si.sadhcnt;
764 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
765 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
767 return nlmsg_end(skb, nlh);
770 nlmsg_cancel(skb, nlh);
774 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
775 struct rtattr **xfrma)
777 struct sk_buff *r_skb;
778 u32 *flags = nlmsg_data(nlh);
779 u32 spid = NETLINK_CB(skb).pid;
780 u32 seq = nlh->nlmsg_seq;
781 int len = NLMSG_LENGTH(sizeof(u32));
783 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
784 len += RTA_SPACE(sizeof(u32));
786 r_skb = alloc_skb(len, GFP_ATOMIC);
791 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
794 return nlmsg_unicast(xfrm_nl, r_skb, spid);
797 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
798 struct rtattr **xfrma)
800 struct xfrm_usersa_id *p = nlmsg_data(nlh);
801 struct xfrm_state *x;
802 struct sk_buff *resp_skb;
805 x = xfrm_user_state_lookup(p, xfrma, &err);
809 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
810 if (IS_ERR(resp_skb)) {
811 err = PTR_ERR(resp_skb);
813 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
820 static int verify_userspi_info(struct xfrm_userspi_info *p)
822 switch (p->info.id.proto) {
828 /* IPCOMP spi is 16-bits. */
829 if (p->max >= 0x10000)
843 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
844 struct rtattr **xfrma)
846 struct xfrm_state *x;
847 struct xfrm_userspi_info *p;
848 struct sk_buff *resp_skb;
849 xfrm_address_t *daddr;
854 err = verify_userspi_info(p);
858 family = p->info.family;
859 daddr = &p->info.id.daddr;
863 x = xfrm_find_acq_byseq(p->info.seq);
864 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
871 x = xfrm_find_acq(p->info.mode, p->info.reqid,
872 p->info.id.proto, daddr,
879 resp_skb = ERR_PTR(-ENOENT);
881 spin_lock_bh(&x->lock);
882 if (x->km.state != XFRM_STATE_DEAD) {
883 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
885 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
887 spin_unlock_bh(&x->lock);
889 if (IS_ERR(resp_skb)) {
890 err = PTR_ERR(resp_skb);
894 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
902 static int verify_policy_dir(u8 dir)
906 case XFRM_POLICY_OUT:
907 case XFRM_POLICY_FWD:
917 static int verify_policy_type(u8 type)
920 case XFRM_POLICY_TYPE_MAIN:
921 #ifdef CONFIG_XFRM_SUB_POLICY
922 case XFRM_POLICY_TYPE_SUB:
933 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
937 case XFRM_SHARE_SESSION:
938 case XFRM_SHARE_USER:
939 case XFRM_SHARE_UNIQUE:
947 case XFRM_POLICY_ALLOW:
948 case XFRM_POLICY_BLOCK:
955 switch (p->sel.family) {
960 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
963 return -EAFNOSUPPORT;
970 return verify_policy_dir(p->dir);
973 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
975 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
976 struct xfrm_user_sec_ctx *uctx;
982 return security_xfrm_policy_alloc(pol, uctx);
985 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
991 for (i = 0; i < nr; i++, ut++) {
992 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
994 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
995 memcpy(&t->saddr, &ut->saddr,
996 sizeof(xfrm_address_t));
997 t->reqid = ut->reqid;
999 t->share = ut->share;
1000 t->optional = ut->optional;
1001 t->aalgos = ut->aalgos;
1002 t->ealgos = ut->ealgos;
1003 t->calgos = ut->calgos;
1004 t->encap_family = ut->family;
1008 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1012 if (nr > XFRM_MAX_DEPTH)
1015 for (i = 0; i < nr; i++) {
1016 /* We never validated the ut->family value, so many
1017 * applications simply leave it at zero. The check was
1018 * never made and ut->family was ignored because all
1019 * templates could be assumed to have the same family as
1020 * the policy itself. Now that we will have ipv4-in-ipv6
1021 * and ipv6-in-ipv4 tunnels, this is no longer true.
1024 ut[i].family = family;
1026 switch (ut[i].family) {
1029 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1041 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1043 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1048 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1049 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1052 err = validate_tmpl(nr, utmpl, pol->family);
1056 copy_templates(pol, RTA_DATA(rt), nr);
1061 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1063 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1064 struct xfrm_userpolicy_type *upt;
1065 u8 type = XFRM_POLICY_TYPE_MAIN;
1069 if (rt->rta_len < sizeof(*upt))
1076 err = verify_policy_type(type);
1084 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1086 xp->priority = p->priority;
1087 xp->index = p->index;
1088 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1089 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1090 xp->action = p->action;
1091 xp->flags = p->flags;
1092 xp->family = p->sel.family;
1093 /* XXX xp->share = p->share; */
1096 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1098 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1099 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1100 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1101 p->priority = xp->priority;
1102 p->index = xp->index;
1103 p->sel.family = xp->family;
1105 p->action = xp->action;
1106 p->flags = xp->flags;
1107 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1110 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1112 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1120 copy_from_user_policy(xp, p);
1122 err = copy_from_user_policy_type(&xp->type, xfrma);
1126 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1127 err = copy_from_user_sec_ctx(xp, xfrma);
1138 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1139 struct rtattr **xfrma)
1141 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1142 struct xfrm_policy *xp;
1147 err = verify_newpolicy_info(p);
1150 err = verify_sec_ctx_len(xfrma);
1154 xp = xfrm_policy_construct(p, xfrma, &err);
1158 /* shouldnt excl be based on nlh flags??
1159 * Aha! this is anti-netlink really i.e more pfkey derived
1160 * in netlink excl is a flag and you wouldnt need
1161 * a type XFRM_MSG_UPDPOLICY - JHS */
1162 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1163 err = xfrm_policy_insert(p->dir, xp, excl);
1164 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1165 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1168 security_xfrm_policy_free(xp);
1173 c.event = nlh->nlmsg_type;
1174 c.seq = nlh->nlmsg_seq;
1175 c.pid = nlh->nlmsg_pid;
1176 km_policy_notify(xp, p->dir, &c);
1183 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1185 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1188 if (xp->xfrm_nr == 0)
1191 for (i = 0; i < xp->xfrm_nr; i++) {
1192 struct xfrm_user_tmpl *up = &vec[i];
1193 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1195 memcpy(&up->id, &kp->id, sizeof(up->id));
1196 up->family = kp->encap_family;
1197 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1198 up->reqid = kp->reqid;
1199 up->mode = kp->mode;
1200 up->share = kp->share;
1201 up->optional = kp->optional;
1202 up->aalgos = kp->aalgos;
1203 up->ealgos = kp->ealgos;
1204 up->calgos = kp->calgos;
1207 return nla_put(skb, XFRMA_TMPL,
1208 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1211 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1214 return copy_sec_ctx(x->security, skb);
1219 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1222 return copy_sec_ctx(xp->security, skb);
1227 #ifdef CONFIG_XFRM_SUB_POLICY
1228 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1230 struct xfrm_userpolicy_type upt = {
1234 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1238 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1244 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1246 struct xfrm_dump_info *sp = ptr;
1247 struct xfrm_userpolicy_info *p;
1248 struct sk_buff *in_skb = sp->in_skb;
1249 struct sk_buff *skb = sp->out_skb;
1250 struct nlmsghdr *nlh;
1252 if (sp->this_idx < sp->start_idx)
1255 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1256 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1260 p = nlmsg_data(nlh);
1261 copy_to_user_policy(xp, p, dir);
1262 if (copy_to_user_tmpl(xp, skb) < 0)
1264 if (copy_to_user_sec_ctx(xp, skb))
1266 if (copy_to_user_policy_type(xp->type, skb) < 0)
1269 nlmsg_end(skb, nlh);
1275 nlmsg_cancel(skb, nlh);
1279 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1281 struct xfrm_dump_info info;
1283 info.in_skb = cb->skb;
1285 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1286 info.nlmsg_flags = NLM_F_MULTI;
1288 info.start_idx = cb->args[0];
1289 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1290 #ifdef CONFIG_XFRM_SUB_POLICY
1291 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1293 cb->args[0] = info.this_idx;
1298 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1299 struct xfrm_policy *xp,
1302 struct xfrm_dump_info info;
1303 struct sk_buff *skb;
1305 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1307 return ERR_PTR(-ENOMEM);
1309 info.in_skb = in_skb;
1311 info.nlmsg_seq = seq;
1312 info.nlmsg_flags = 0;
1313 info.this_idx = info.start_idx = 0;
1315 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1323 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1324 struct rtattr **xfrma)
1326 struct xfrm_policy *xp;
1327 struct xfrm_userpolicy_id *p;
1328 u8 type = XFRM_POLICY_TYPE_MAIN;
1333 p = nlmsg_data(nlh);
1334 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1336 err = copy_from_user_policy_type(&type, xfrma);
1340 err = verify_policy_dir(p->dir);
1345 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1347 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1348 struct xfrm_policy tmp;
1350 err = verify_sec_ctx_len(xfrma);
1354 memset(&tmp, 0, sizeof(struct xfrm_policy));
1356 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1358 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1361 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1363 security_xfrm_policy_free(&tmp);
1369 struct sk_buff *resp_skb;
1371 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1372 if (IS_ERR(resp_skb)) {
1373 err = PTR_ERR(resp_skb);
1375 err = nlmsg_unicast(xfrm_nl, resp_skb,
1376 NETLINK_CB(skb).pid);
1379 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1380 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1385 c.data.byid = p->index;
1386 c.event = nlh->nlmsg_type;
1387 c.seq = nlh->nlmsg_seq;
1388 c.pid = nlh->nlmsg_pid;
1389 km_policy_notify(xp, p->dir, &c);
1397 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1398 struct rtattr **xfrma)
1401 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1402 struct xfrm_audit audit_info;
1405 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1406 audit_info.secid = NETLINK_CB(skb).sid;
1407 err = xfrm_state_flush(p->proto, &audit_info);
1410 c.data.proto = p->proto;
1411 c.event = nlh->nlmsg_type;
1412 c.seq = nlh->nlmsg_seq;
1413 c.pid = nlh->nlmsg_pid;
1414 km_state_notify(NULL, &c);
1420 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1422 struct xfrm_aevent_id *id;
1423 struct nlmsghdr *nlh;
1425 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1429 id = nlmsg_data(nlh);
1430 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1431 id->sa_id.spi = x->id.spi;
1432 id->sa_id.family = x->props.family;
1433 id->sa_id.proto = x->id.proto;
1434 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1435 id->reqid = x->props.reqid;
1436 id->flags = c->data.aevent;
1438 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1439 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1441 if (id->flags & XFRM_AE_RTHR)
1442 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1444 if (id->flags & XFRM_AE_ETHR)
1445 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1446 x->replay_maxage * 10 / HZ);
1448 return nlmsg_end(skb, nlh);
1451 nlmsg_cancel(skb, nlh);
1455 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1456 struct rtattr **xfrma)
1458 struct xfrm_state *x;
1459 struct sk_buff *r_skb;
1462 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1463 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1464 struct xfrm_usersa_id *id = &p->sa_id;
1466 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1467 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1469 if (p->flags&XFRM_AE_RTHR)
1470 len+=RTA_SPACE(sizeof(u32));
1472 if (p->flags&XFRM_AE_ETHR)
1473 len+=RTA_SPACE(sizeof(u32));
1475 r_skb = alloc_skb(len, GFP_ATOMIC);
1479 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1486 * XXX: is this lock really needed - none of the other
1487 * gets lock (the concern is things getting updated
1488 * while we are still reading) - jhs
1490 spin_lock_bh(&x->lock);
1491 c.data.aevent = p->flags;
1492 c.seq = nlh->nlmsg_seq;
1493 c.pid = nlh->nlmsg_pid;
1495 if (build_aevent(r_skb, x, &c) < 0)
1497 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1498 spin_unlock_bh(&x->lock);
1503 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1504 struct rtattr **xfrma)
1506 struct xfrm_state *x;
1509 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1510 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1511 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1516 /* pedantic mode - thou shalt sayeth replaceth */
1517 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1520 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1524 if (x->km.state != XFRM_STATE_VALID)
1527 spin_lock_bh(&x->lock);
1528 err = xfrm_update_ae_params(x, xfrma);
1529 spin_unlock_bh(&x->lock);
1533 c.event = nlh->nlmsg_type;
1534 c.seq = nlh->nlmsg_seq;
1535 c.pid = nlh->nlmsg_pid;
1536 c.data.aevent = XFRM_AE_CU;
1537 km_state_notify(x, &c);
1544 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1545 struct rtattr **xfrma)
1548 u8 type = XFRM_POLICY_TYPE_MAIN;
1550 struct xfrm_audit audit_info;
1552 err = copy_from_user_policy_type(&type, xfrma);
1556 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1557 audit_info.secid = NETLINK_CB(skb).sid;
1558 err = xfrm_policy_flush(type, &audit_info);
1562 c.event = nlh->nlmsg_type;
1563 c.seq = nlh->nlmsg_seq;
1564 c.pid = nlh->nlmsg_pid;
1565 km_policy_notify(NULL, 0, &c);
1569 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1570 struct rtattr **xfrma)
1572 struct xfrm_policy *xp;
1573 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1574 struct xfrm_userpolicy_info *p = &up->pol;
1575 u8 type = XFRM_POLICY_TYPE_MAIN;
1578 err = copy_from_user_policy_type(&type, xfrma);
1583 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1585 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1586 struct xfrm_policy tmp;
1588 err = verify_sec_ctx_len(xfrma);
1592 memset(&tmp, 0, sizeof(struct xfrm_policy));
1594 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1596 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1599 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1601 security_xfrm_policy_free(&tmp);
1606 read_lock(&xp->lock);
1608 read_unlock(&xp->lock);
1612 read_unlock(&xp->lock);
1615 xfrm_policy_delete(xp, p->dir);
1616 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1617 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1620 // reset the timers here?
1621 printk("Dont know what to do with soft policy expire\n");
1623 km_policy_expired(xp, p->dir, up->hard, current->pid);
1630 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1631 struct rtattr **xfrma)
1633 struct xfrm_state *x;
1635 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1636 struct xfrm_usersa_info *p = &ue->state;
1638 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1644 spin_lock_bh(&x->lock);
1646 if (x->km.state != XFRM_STATE_VALID)
1648 km_state_expired(x, ue->hard, current->pid);
1651 __xfrm_state_delete(x);
1652 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1653 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1657 spin_unlock_bh(&x->lock);
1662 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1663 struct rtattr **xfrma)
1665 struct xfrm_policy *xp;
1666 struct xfrm_user_tmpl *ut;
1668 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1670 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1671 struct xfrm_state *x = xfrm_state_alloc();
1677 err = verify_newpolicy_info(&ua->policy);
1679 printk("BAD policy passed\n");
1685 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1691 memcpy(&x->id, &ua->id, sizeof(ua->id));
1692 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1693 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1696 /* extract the templates and for each call km_key */
1697 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1698 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1699 memcpy(&x->id, &t->id, sizeof(x->id));
1700 x->props.mode = t->mode;
1701 x->props.reqid = t->reqid;
1702 x->props.family = ut->family;
1703 t->aalgos = ua->aalgos;
1704 t->ealgos = ua->ealgos;
1705 t->calgos = ua->calgos;
1706 err = km_query(x, t, xp);
1716 #ifdef CONFIG_XFRM_MIGRATE
1717 static int verify_user_migrate(struct rtattr **xfrma)
1719 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1720 struct xfrm_user_migrate *um;
1725 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1731 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1732 struct rtattr **xfrma, int *num)
1734 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1735 struct xfrm_user_migrate *um;
1739 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1741 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1744 for (i = 0; i < num_migrate; i++, um++, ma++) {
1745 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1746 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1747 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1748 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1750 ma->proto = um->proto;
1751 ma->mode = um->mode;
1752 ma->reqid = um->reqid;
1754 ma->old_family = um->old_family;
1755 ma->new_family = um->new_family;
1762 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1763 struct rtattr **xfrma)
1765 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1766 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1771 err = verify_user_migrate((struct rtattr **)xfrma);
1775 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1779 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1780 (struct rtattr **)xfrma, &n);
1787 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1792 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1793 struct rtattr **xfrma)
1795 return -ENOPROTOOPT;
1799 #ifdef CONFIG_XFRM_MIGRATE
1800 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1802 struct xfrm_user_migrate um;
1804 memset(&um, 0, sizeof(um));
1805 um.proto = m->proto;
1807 um.reqid = m->reqid;
1808 um.old_family = m->old_family;
1809 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1810 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1811 um.new_family = m->new_family;
1812 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1813 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1815 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1818 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1819 int num_migrate, struct xfrm_selector *sel,
1822 struct xfrm_migrate *mp;
1823 struct xfrm_userpolicy_id *pol_id;
1824 struct nlmsghdr *nlh;
1827 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1831 pol_id = nlmsg_data(nlh);
1832 /* copy data from selector, dir, and type to the pol_id */
1833 memset(pol_id, 0, sizeof(*pol_id));
1834 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1837 if (copy_to_user_policy_type(type, skb) < 0)
1840 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1841 if (copy_to_user_migrate(mp, skb) < 0)
1845 return nlmsg_end(skb, nlh);
1847 nlmsg_cancel(skb, nlh);
1851 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1852 struct xfrm_migrate *m, int num_migrate)
1854 struct sk_buff *skb;
1857 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1858 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1859 #ifdef CONFIG_XFRM_SUB_POLICY
1860 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1862 skb = alloc_skb(len, GFP_ATOMIC);
1867 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1870 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1873 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1874 struct xfrm_migrate *m, int num_migrate)
1876 return -ENOPROTOOPT;
1880 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1882 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1883 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1884 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1885 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1886 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1887 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1888 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1889 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1890 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1891 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1892 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1893 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1894 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1895 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1896 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1897 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1898 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1899 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1900 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1901 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1902 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1907 static struct xfrm_link {
1908 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1909 int (*dump)(struct sk_buff *, struct netlink_callback *);
1910 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1911 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1912 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1913 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1914 .dump = xfrm_dump_sa },
1915 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1916 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1917 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1918 .dump = xfrm_dump_policy },
1919 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1920 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1921 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1922 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1923 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1924 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1925 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1926 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1927 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1928 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1929 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1930 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1931 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1934 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1936 struct rtattr *xfrma[XFRMA_MAX];
1937 struct xfrm_link *link;
1940 type = nlh->nlmsg_type;
1941 if (type > XFRM_MSG_MAX)
1944 type -= XFRM_MSG_BASE;
1945 link = &xfrm_dispatch[type];
1947 /* All operations require privileges, even GET */
1948 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1951 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1952 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1953 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1954 if (link->dump == NULL)
1957 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1960 memset(xfrma, 0, sizeof(xfrma));
1962 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1965 if (nlh->nlmsg_len > min_len) {
1966 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1967 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1969 while (RTA_OK(attr, attrlen)) {
1970 unsigned short flavor = attr->rta_type;
1972 if (flavor > XFRMA_MAX)
1974 xfrma[flavor - 1] = attr;
1976 attr = RTA_NEXT(attr, attrlen);
1980 if (link->doit == NULL)
1983 return link->doit(skb, nlh, xfrma);
1986 static void xfrm_netlink_rcv(struct sock *sk, int len)
1988 unsigned int qlen = 0;
1991 mutex_lock(&xfrm_cfg_mutex);
1992 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1993 mutex_unlock(&xfrm_cfg_mutex);
1998 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2000 struct xfrm_user_expire *ue;
2001 struct nlmsghdr *nlh;
2003 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2007 ue = nlmsg_data(nlh);
2008 copy_to_user_state(x, &ue->state);
2009 ue->hard = (c->data.hard != 0) ? 1 : 0;
2011 return nlmsg_end(skb, nlh);
2014 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2016 struct sk_buff *skb;
2017 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2019 skb = alloc_skb(len, GFP_ATOMIC);
2023 if (build_expire(skb, x, c) < 0)
2026 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2029 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2031 struct sk_buff *skb;
2032 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2034 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2035 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2036 skb = alloc_skb(len, GFP_ATOMIC);
2040 if (build_aevent(skb, x, c) < 0)
2043 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2046 static int xfrm_notify_sa_flush(struct km_event *c)
2048 struct xfrm_usersa_flush *p;
2049 struct nlmsghdr *nlh;
2050 struct sk_buff *skb;
2051 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2053 skb = alloc_skb(len, GFP_ATOMIC);
2057 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2063 p = nlmsg_data(nlh);
2064 p->proto = c->data.proto;
2066 nlmsg_end(skb, nlh);
2068 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2071 static inline int xfrm_sa_len(struct xfrm_state *x)
2075 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2077 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2079 l += RTA_SPACE(sizeof(*x->calg));
2081 l += RTA_SPACE(sizeof(*x->encap));
2086 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2088 struct xfrm_usersa_info *p;
2089 struct xfrm_usersa_id *id;
2090 struct nlmsghdr *nlh;
2091 struct sk_buff *skb;
2092 int len = xfrm_sa_len(x);
2095 headlen = sizeof(*p);
2096 if (c->event == XFRM_MSG_DELSA) {
2097 len += RTA_SPACE(headlen);
2098 headlen = sizeof(*id);
2100 len += NLMSG_SPACE(headlen);
2102 skb = alloc_skb(len, GFP_ATOMIC);
2106 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2108 goto nla_put_failure;
2110 p = nlmsg_data(nlh);
2111 if (c->event == XFRM_MSG_DELSA) {
2112 struct nlattr *attr;
2114 id = nlmsg_data(nlh);
2115 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2116 id->spi = x->id.spi;
2117 id->family = x->props.family;
2118 id->proto = x->id.proto;
2120 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2122 goto nla_put_failure;
2127 copy_to_user_state(x, p);
2130 NLA_PUT(skb, XFRMA_ALG_AUTH,
2131 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2133 NLA_PUT(skb, XFRMA_ALG_CRYPT,
2134 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2136 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2139 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2141 nlmsg_end(skb, nlh);
2143 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2150 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2154 case XFRM_MSG_EXPIRE:
2155 return xfrm_exp_state_notify(x, c);
2156 case XFRM_MSG_NEWAE:
2157 return xfrm_aevent_state_notify(x, c);
2158 case XFRM_MSG_DELSA:
2159 case XFRM_MSG_UPDSA:
2160 case XFRM_MSG_NEWSA:
2161 return xfrm_notify_sa(x, c);
2162 case XFRM_MSG_FLUSHSA:
2163 return xfrm_notify_sa_flush(c);
2165 printk("xfrm_user: Unknown SA event %d\n", c->event);
2173 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2174 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2177 struct xfrm_user_acquire *ua;
2178 struct nlmsghdr *nlh;
2179 __u32 seq = xfrm_get_acqseq();
2181 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2185 ua = nlmsg_data(nlh);
2186 memcpy(&ua->id, &x->id, sizeof(ua->id));
2187 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2188 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2189 copy_to_user_policy(xp, &ua->policy, dir);
2190 ua->aalgos = xt->aalgos;
2191 ua->ealgos = xt->ealgos;
2192 ua->calgos = xt->calgos;
2193 ua->seq = x->km.seq = seq;
2195 if (copy_to_user_tmpl(xp, skb) < 0)
2197 if (copy_to_user_state_sec_ctx(x, skb))
2199 if (copy_to_user_policy_type(xp->type, skb) < 0)
2202 return nlmsg_end(skb, nlh);
2205 nlmsg_cancel(skb, nlh);
2209 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2210 struct xfrm_policy *xp, int dir)
2212 struct sk_buff *skb;
2215 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2216 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2217 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2218 #ifdef CONFIG_XFRM_SUB_POLICY
2219 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2221 skb = alloc_skb(len, GFP_ATOMIC);
2225 if (build_acquire(skb, x, xt, xp, dir) < 0)
2228 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2231 /* User gives us xfrm_user_policy_info followed by an array of 0
2232 * or more templates.
2234 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2235 u8 *data, int len, int *dir)
2237 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2238 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2239 struct xfrm_policy *xp;
2242 switch (sk->sk_family) {
2244 if (opt != IP_XFRM_POLICY) {
2249 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2251 if (opt != IPV6_XFRM_POLICY) {
2264 if (len < sizeof(*p) ||
2265 verify_newpolicy_info(p))
2268 nr = ((len - sizeof(*p)) / sizeof(*ut));
2269 if (validate_tmpl(nr, ut, p->sel.family))
2272 if (p->dir > XFRM_POLICY_OUT)
2275 xp = xfrm_policy_alloc(GFP_KERNEL);
2281 copy_from_user_policy(xp, p);
2282 xp->type = XFRM_POLICY_TYPE_MAIN;
2283 copy_templates(xp, ut, nr);
2290 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2291 int dir, struct km_event *c)
2293 struct xfrm_user_polexpire *upe;
2294 struct nlmsghdr *nlh;
2295 int hard = c->data.hard;
2297 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2301 upe = nlmsg_data(nlh);
2302 copy_to_user_policy(xp, &upe->pol, dir);
2303 if (copy_to_user_tmpl(xp, skb) < 0)
2305 if (copy_to_user_sec_ctx(xp, skb))
2307 if (copy_to_user_policy_type(xp->type, skb) < 0)
2311 return nlmsg_end(skb, nlh);
2314 nlmsg_cancel(skb, nlh);
2318 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2320 struct sk_buff *skb;
2323 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2324 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2325 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2326 #ifdef CONFIG_XFRM_SUB_POLICY
2327 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2329 skb = alloc_skb(len, GFP_ATOMIC);
2333 if (build_polexpire(skb, xp, dir, c) < 0)
2336 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2339 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2341 struct xfrm_userpolicy_info *p;
2342 struct xfrm_userpolicy_id *id;
2343 struct nlmsghdr *nlh;
2344 struct sk_buff *skb;
2345 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2348 headlen = sizeof(*p);
2349 if (c->event == XFRM_MSG_DELPOLICY) {
2350 len += RTA_SPACE(headlen);
2351 headlen = sizeof(*id);
2353 #ifdef CONFIG_XFRM_SUB_POLICY
2354 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2356 len += NLMSG_SPACE(headlen);
2358 skb = alloc_skb(len, GFP_ATOMIC);
2362 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2366 p = nlmsg_data(nlh);
2367 if (c->event == XFRM_MSG_DELPOLICY) {
2368 struct nlattr *attr;
2370 id = nlmsg_data(nlh);
2371 memset(id, 0, sizeof(*id));
2374 id->index = xp->index;
2376 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2378 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2385 copy_to_user_policy(xp, p, dir);
2386 if (copy_to_user_tmpl(xp, skb) < 0)
2388 if (copy_to_user_policy_type(xp->type, skb) < 0)
2391 nlmsg_end(skb, nlh);
2393 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2400 static int xfrm_notify_policy_flush(struct km_event *c)
2402 struct nlmsghdr *nlh;
2403 struct sk_buff *skb;
2405 #ifdef CONFIG_XFRM_SUB_POLICY
2406 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2408 len += NLMSG_LENGTH(0);
2410 skb = alloc_skb(len, GFP_ATOMIC);
2414 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2417 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2420 nlmsg_end(skb, nlh);
2422 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2429 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2433 case XFRM_MSG_NEWPOLICY:
2434 case XFRM_MSG_UPDPOLICY:
2435 case XFRM_MSG_DELPOLICY:
2436 return xfrm_notify_policy(xp, dir, c);
2437 case XFRM_MSG_FLUSHPOLICY:
2438 return xfrm_notify_policy_flush(c);
2439 case XFRM_MSG_POLEXPIRE:
2440 return xfrm_exp_policy_notify(xp, dir, c);
2442 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2449 static int build_report(struct sk_buff *skb, u8 proto,
2450 struct xfrm_selector *sel, xfrm_address_t *addr)
2452 struct xfrm_user_report *ur;
2453 struct nlmsghdr *nlh;
2455 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2459 ur = nlmsg_data(nlh);
2461 memcpy(&ur->sel, sel, sizeof(ur->sel));
2464 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2466 return nlmsg_end(skb, nlh);
2469 nlmsg_cancel(skb, nlh);
2473 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2474 xfrm_address_t *addr)
2476 struct sk_buff *skb;
2479 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2480 skb = alloc_skb(len, GFP_ATOMIC);
2484 if (build_report(skb, proto, sel, addr) < 0)
2487 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2490 static struct xfrm_mgr netlink_mgr = {
2492 .notify = xfrm_send_state_notify,
2493 .acquire = xfrm_send_acquire,
2494 .compile_policy = xfrm_compile_policy,
2495 .notify_policy = xfrm_send_policy_notify,
2496 .report = xfrm_send_report,
2497 .migrate = xfrm_send_migrate,
2500 static int __init xfrm_user_init(void)
2504 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2506 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2507 xfrm_netlink_rcv, NULL, THIS_MODULE);
2510 rcu_assign_pointer(xfrm_nl, nlsk);
2512 xfrm_register_km(&netlink_mgr);
2517 static void __exit xfrm_user_exit(void)
2519 struct sock *nlsk = xfrm_nl;
2521 xfrm_unregister_km(&netlink_mgr);
2522 rcu_assign_pointer(xfrm_nl, NULL);
2524 sock_release(nlsk->sk_socket);
2527 module_init(xfrm_user_init);
2528 module_exit(xfrm_user_exit);
2529 MODULE_LICENSE("GPL");
2530 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);