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/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
29 #include <asm/uaccess.h>
30 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31 #include <linux/in6.h>
34 static inline int alg_len(struct xfrm_algo *alg)
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
39 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
41 struct nlattr *rt = attrs[type];
42 struct xfrm_algo *algp;
48 if (nla_len(rt) < alg_len(algp))
53 if (!algp->alg_key_len &&
54 strcmp(algp->alg_name, "digest_null") != 0)
59 if (!algp->alg_key_len &&
60 strcmp(algp->alg_name, "cipher_null") != 0)
65 /* Zero length keys are legal. */
72 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
76 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
77 xfrm_address_t **addrp)
79 struct nlattr *rt = attrs[type];
82 *addrp = nla_data(rt);
85 static inline int verify_sec_ctx_len(struct nlattr **attrs)
87 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
88 struct xfrm_user_sec_ctx *uctx;
94 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
101 static int verify_newsa_info(struct xfrm_usersa_info *p,
102 struct nlattr **attrs)
112 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
124 switch (p->id.proto) {
126 if (!attrs[XFRMA_ALG_AUTH] ||
127 attrs[XFRMA_ALG_CRYPT] ||
128 attrs[XFRMA_ALG_COMP])
133 if ((!attrs[XFRMA_ALG_AUTH] &&
134 !attrs[XFRMA_ALG_CRYPT]) ||
135 attrs[XFRMA_ALG_COMP])
140 if (!attrs[XFRMA_ALG_COMP] ||
141 attrs[XFRMA_ALG_AUTH] ||
142 attrs[XFRMA_ALG_CRYPT])
146 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
147 case IPPROTO_DSTOPTS:
148 case IPPROTO_ROUTING:
149 if (attrs[XFRMA_ALG_COMP] ||
150 attrs[XFRMA_ALG_AUTH] ||
151 attrs[XFRMA_ALG_CRYPT] ||
152 attrs[XFRMA_ENCAP] ||
153 attrs[XFRMA_SEC_CTX] ||
154 !attrs[XFRMA_COADDR])
163 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
165 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
167 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
169 if ((err = verify_sec_ctx_len(attrs)))
174 case XFRM_MODE_TRANSPORT:
175 case XFRM_MODE_TUNNEL:
176 case XFRM_MODE_ROUTEOPTIMIZATION:
190 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
191 struct xfrm_algo_desc *(*get_byname)(char *, int),
194 struct xfrm_algo *p, *ualg;
195 struct xfrm_algo_desc *algo;
200 ualg = nla_data(rta);
202 algo = get_byname(ualg->alg_name, 1);
205 *props = algo->desc.sadb_alg_id;
207 p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
211 strcpy(p->alg_name, algo->name);
216 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
221 len += sizeof(struct xfrm_user_sec_ctx);
222 len += xfrm_ctx->ctx_len;
227 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
229 memcpy(&x->id, &p->id, sizeof(x->id));
230 memcpy(&x->sel, &p->sel, sizeof(x->sel));
231 memcpy(&x->lft, &p->lft, sizeof(x->lft));
232 x->props.mode = p->mode;
233 x->props.replay_window = p->replay_window;
234 x->props.reqid = p->reqid;
235 x->props.family = p->family;
236 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
237 x->props.flags = p->flags;
240 * Set inner address family if the KM left it as zero.
241 * See comment in validate_tmpl.
244 x->sel.family = p->family;
248 * someday when pfkey also has support, we could have the code
249 * somehow made shareable and move it to xfrm_state.c - JHS
252 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
254 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
255 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
256 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
257 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
260 struct xfrm_replay_state *replay;
261 replay = nla_data(rp);
262 memcpy(&x->replay, replay, sizeof(*replay));
263 memcpy(&x->preplay, replay, sizeof(*replay));
267 struct xfrm_lifetime_cur *ltime;
268 ltime = nla_data(lt);
269 x->curlft.bytes = ltime->bytes;
270 x->curlft.packets = ltime->packets;
271 x->curlft.add_time = ltime->add_time;
272 x->curlft.use_time = ltime->use_time;
276 x->replay_maxage = nla_get_u32(et);
279 x->replay_maxdiff = nla_get_u32(rt);
282 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
283 struct nlattr **attrs,
286 struct xfrm_state *x = xfrm_state_alloc();
292 copy_from_user_state(x, p);
294 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
295 xfrm_aalg_get_byname,
296 attrs[XFRMA_ALG_AUTH])))
298 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
299 xfrm_ealg_get_byname,
300 attrs[XFRMA_ALG_CRYPT])))
302 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
303 xfrm_calg_get_byname,
304 attrs[XFRMA_ALG_COMP])))
307 if (attrs[XFRMA_ENCAP]) {
308 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
309 sizeof(*x->encap), GFP_KERNEL);
310 if (x->encap == NULL)
314 if (attrs[XFRMA_COADDR]) {
315 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
316 sizeof(*x->coaddr), GFP_KERNEL);
317 if (x->coaddr == NULL)
321 err = xfrm_init_state(x);
325 if (attrs[XFRMA_SEC_CTX] &&
326 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
330 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
331 /* sysctl_xfrm_aevent_etime is in 100ms units */
332 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
333 x->preplay.bitmap = 0;
334 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
335 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
337 /* override default values from above */
339 xfrm_update_ae_params(x, attrs);
344 x->km.state = XFRM_STATE_DEAD;
351 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
352 struct nlattr **attrs)
354 struct xfrm_usersa_info *p = nlmsg_data(nlh);
355 struct xfrm_state *x;
359 err = verify_newsa_info(p, attrs);
363 x = xfrm_state_construct(p, attrs, &err);
368 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
369 err = xfrm_state_add(x);
371 err = xfrm_state_update(x);
373 xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
374 NETLINK_CB(skb).sid);
377 x->km.state = XFRM_STATE_DEAD;
382 c.seq = nlh->nlmsg_seq;
383 c.pid = nlh->nlmsg_pid;
384 c.event = nlh->nlmsg_type;
386 km_state_notify(x, &c);
392 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
393 struct nlattr **attrs,
396 struct xfrm_state *x = NULL;
399 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
401 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
403 xfrm_address_t *saddr = NULL;
405 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
412 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
422 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
423 struct nlattr **attrs)
425 struct xfrm_state *x;
428 struct xfrm_usersa_id *p = nlmsg_data(nlh);
430 x = xfrm_user_state_lookup(p, attrs, &err);
434 if ((err = security_xfrm_state_delete(x)) != 0)
437 if (xfrm_state_kern(x)) {
442 err = xfrm_state_delete(x);
447 c.seq = nlh->nlmsg_seq;
448 c.pid = nlh->nlmsg_pid;
449 c.event = nlh->nlmsg_type;
450 km_state_notify(x, &c);
453 xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
454 NETLINK_CB(skb).sid);
459 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
461 memcpy(&p->id, &x->id, sizeof(p->id));
462 memcpy(&p->sel, &x->sel, sizeof(p->sel));
463 memcpy(&p->lft, &x->lft, sizeof(p->lft));
464 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
465 memcpy(&p->stats, &x->stats, sizeof(p->stats));
466 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
467 p->mode = x->props.mode;
468 p->replay_window = x->props.replay_window;
469 p->reqid = x->props.reqid;
470 p->family = x->props.family;
471 p->flags = x->props.flags;
475 struct xfrm_dump_info {
476 struct sk_buff *in_skb;
477 struct sk_buff *out_skb;
484 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
486 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
487 struct xfrm_user_sec_ctx *uctx;
490 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
494 uctx = nla_data(attr);
495 uctx->exttype = XFRMA_SEC_CTX;
496 uctx->len = ctx_size;
497 uctx->ctx_doi = s->ctx_doi;
498 uctx->ctx_alg = s->ctx_alg;
499 uctx->ctx_len = s->ctx_len;
500 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
505 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
507 struct xfrm_dump_info *sp = ptr;
508 struct sk_buff *in_skb = sp->in_skb;
509 struct sk_buff *skb = sp->out_skb;
510 struct xfrm_usersa_info *p;
511 struct nlmsghdr *nlh;
513 if (sp->this_idx < sp->start_idx)
516 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
517 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
522 copy_to_user_state(x, p);
525 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
527 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
529 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
532 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
534 if (x->security && copy_sec_ctx(x->security, skb) < 0)
535 goto nla_put_failure;
538 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
541 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
549 nlmsg_cancel(skb, nlh);
553 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
555 struct xfrm_dump_info info;
557 info.in_skb = cb->skb;
559 info.nlmsg_seq = cb->nlh->nlmsg_seq;
560 info.nlmsg_flags = NLM_F_MULTI;
562 info.start_idx = cb->args[0];
563 (void) xfrm_state_walk(0, dump_one_state, &info);
564 cb->args[0] = info.this_idx;
569 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
570 struct xfrm_state *x, u32 seq)
572 struct xfrm_dump_info info;
575 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
577 return ERR_PTR(-ENOMEM);
579 info.in_skb = in_skb;
581 info.nlmsg_seq = seq;
582 info.nlmsg_flags = 0;
583 info.this_idx = info.start_idx = 0;
585 if (dump_one_state(x, 0, &info)) {
593 static inline size_t xfrm_spdinfo_msgsize(void)
595 return NLMSG_ALIGN(4)
596 + nla_total_size(sizeof(struct xfrmu_spdinfo))
597 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
600 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
602 struct xfrmk_spdinfo si;
603 struct xfrmu_spdinfo spc;
604 struct xfrmu_spdhinfo sph;
605 struct nlmsghdr *nlh;
608 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
609 if (nlh == NULL) /* shouldnt really happen ... */
614 xfrm_spd_getinfo(&si);
615 spc.incnt = si.incnt;
616 spc.outcnt = si.outcnt;
617 spc.fwdcnt = si.fwdcnt;
618 spc.inscnt = si.inscnt;
619 spc.outscnt = si.outscnt;
620 spc.fwdscnt = si.fwdscnt;
621 sph.spdhcnt = si.spdhcnt;
622 sph.spdhmcnt = si.spdhmcnt;
624 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
625 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
627 return nlmsg_end(skb, nlh);
630 nlmsg_cancel(skb, nlh);
634 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
635 struct nlattr **attrs)
637 struct sk_buff *r_skb;
638 u32 *flags = nlmsg_data(nlh);
639 u32 spid = NETLINK_CB(skb).pid;
640 u32 seq = nlh->nlmsg_seq;
642 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
646 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
649 return nlmsg_unicast(xfrm_nl, r_skb, spid);
652 static inline size_t xfrm_sadinfo_msgsize(void)
654 return NLMSG_ALIGN(4)
655 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
656 + nla_total_size(4); /* XFRMA_SAD_CNT */
659 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
661 struct xfrmk_sadinfo si;
662 struct xfrmu_sadhinfo sh;
663 struct nlmsghdr *nlh;
666 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
667 if (nlh == NULL) /* shouldnt really happen ... */
672 xfrm_sad_getinfo(&si);
674 sh.sadhmcnt = si.sadhmcnt;
675 sh.sadhcnt = si.sadhcnt;
677 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
678 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
680 return nlmsg_end(skb, nlh);
683 nlmsg_cancel(skb, nlh);
687 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
688 struct nlattr **attrs)
690 struct sk_buff *r_skb;
691 u32 *flags = nlmsg_data(nlh);
692 u32 spid = NETLINK_CB(skb).pid;
693 u32 seq = nlh->nlmsg_seq;
695 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
699 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
702 return nlmsg_unicast(xfrm_nl, r_skb, spid);
705 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
706 struct nlattr **attrs)
708 struct xfrm_usersa_id *p = nlmsg_data(nlh);
709 struct xfrm_state *x;
710 struct sk_buff *resp_skb;
713 x = xfrm_user_state_lookup(p, attrs, &err);
717 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
718 if (IS_ERR(resp_skb)) {
719 err = PTR_ERR(resp_skb);
721 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
728 static int verify_userspi_info(struct xfrm_userspi_info *p)
730 switch (p->info.id.proto) {
736 /* IPCOMP spi is 16-bits. */
737 if (p->max >= 0x10000)
751 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
752 struct nlattr **attrs)
754 struct xfrm_state *x;
755 struct xfrm_userspi_info *p;
756 struct sk_buff *resp_skb;
757 xfrm_address_t *daddr;
762 err = verify_userspi_info(p);
766 family = p->info.family;
767 daddr = &p->info.id.daddr;
771 x = xfrm_find_acq_byseq(p->info.seq);
772 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
779 x = xfrm_find_acq(p->info.mode, p->info.reqid,
780 p->info.id.proto, daddr,
787 resp_skb = ERR_PTR(-ENOENT);
789 spin_lock_bh(&x->lock);
790 if (x->km.state != XFRM_STATE_DEAD) {
791 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
793 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
795 spin_unlock_bh(&x->lock);
797 if (IS_ERR(resp_skb)) {
798 err = PTR_ERR(resp_skb);
802 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
810 static int verify_policy_dir(u8 dir)
814 case XFRM_POLICY_OUT:
815 case XFRM_POLICY_FWD:
825 static int verify_policy_type(u8 type)
828 case XFRM_POLICY_TYPE_MAIN:
829 #ifdef CONFIG_XFRM_SUB_POLICY
830 case XFRM_POLICY_TYPE_SUB:
841 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
845 case XFRM_SHARE_SESSION:
846 case XFRM_SHARE_USER:
847 case XFRM_SHARE_UNIQUE:
855 case XFRM_POLICY_ALLOW:
856 case XFRM_POLICY_BLOCK:
863 switch (p->sel.family) {
868 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
871 return -EAFNOSUPPORT;
878 return verify_policy_dir(p->dir);
881 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
883 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
884 struct xfrm_user_sec_ctx *uctx;
890 return security_xfrm_policy_alloc(pol, uctx);
893 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
899 for (i = 0; i < nr; i++, ut++) {
900 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
902 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
903 memcpy(&t->saddr, &ut->saddr,
904 sizeof(xfrm_address_t));
905 t->reqid = ut->reqid;
907 t->share = ut->share;
908 t->optional = ut->optional;
909 t->aalgos = ut->aalgos;
910 t->ealgos = ut->ealgos;
911 t->calgos = ut->calgos;
912 t->encap_family = ut->family;
916 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
920 if (nr > XFRM_MAX_DEPTH)
923 for (i = 0; i < nr; i++) {
924 /* We never validated the ut->family value, so many
925 * applications simply leave it at zero. The check was
926 * never made and ut->family was ignored because all
927 * templates could be assumed to have the same family as
928 * the policy itself. Now that we will have ipv4-in-ipv6
929 * and ipv6-in-ipv4 tunnels, this is no longer true.
932 ut[i].family = family;
934 switch (ut[i].family) {
937 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
949 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
951 struct nlattr *rt = attrs[XFRMA_TMPL];
956 struct xfrm_user_tmpl *utmpl = nla_data(rt);
957 int nr = nla_len(rt) / sizeof(*utmpl);
960 err = validate_tmpl(nr, utmpl, pol->family);
964 copy_templates(pol, utmpl, nr);
969 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
971 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
972 struct xfrm_userpolicy_type *upt;
973 u8 type = XFRM_POLICY_TYPE_MAIN;
981 err = verify_policy_type(type);
989 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
991 xp->priority = p->priority;
992 xp->index = p->index;
993 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
994 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
995 xp->action = p->action;
996 xp->flags = p->flags;
997 xp->family = p->sel.family;
998 /* XXX xp->share = p->share; */
1001 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1003 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1004 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1005 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1006 p->priority = xp->priority;
1007 p->index = xp->index;
1008 p->sel.family = xp->family;
1010 p->action = xp->action;
1011 p->flags = xp->flags;
1012 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1015 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1017 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1025 copy_from_user_policy(xp, p);
1027 err = copy_from_user_policy_type(&xp->type, attrs);
1031 if (!(err = copy_from_user_tmpl(xp, attrs)))
1032 err = copy_from_user_sec_ctx(xp, attrs);
1043 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1044 struct nlattr **attrs)
1046 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1047 struct xfrm_policy *xp;
1052 err = verify_newpolicy_info(p);
1055 err = verify_sec_ctx_len(attrs);
1059 xp = xfrm_policy_construct(p, attrs, &err);
1063 /* shouldnt excl be based on nlh flags??
1064 * Aha! this is anti-netlink really i.e more pfkey derived
1065 * in netlink excl is a flag and you wouldnt need
1066 * a type XFRM_MSG_UPDPOLICY - JHS */
1067 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1068 err = xfrm_policy_insert(p->dir, xp, excl);
1069 xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid,
1070 NETLINK_CB(skb).sid);
1073 security_xfrm_policy_free(xp);
1078 c.event = nlh->nlmsg_type;
1079 c.seq = nlh->nlmsg_seq;
1080 c.pid = nlh->nlmsg_pid;
1081 km_policy_notify(xp, p->dir, &c);
1088 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1090 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1093 if (xp->xfrm_nr == 0)
1096 for (i = 0; i < xp->xfrm_nr; i++) {
1097 struct xfrm_user_tmpl *up = &vec[i];
1098 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1100 memcpy(&up->id, &kp->id, sizeof(up->id));
1101 up->family = kp->encap_family;
1102 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1103 up->reqid = kp->reqid;
1104 up->mode = kp->mode;
1105 up->share = kp->share;
1106 up->optional = kp->optional;
1107 up->aalgos = kp->aalgos;
1108 up->ealgos = kp->ealgos;
1109 up->calgos = kp->calgos;
1112 return nla_put(skb, XFRMA_TMPL,
1113 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1116 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1119 return copy_sec_ctx(x->security, skb);
1124 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1127 return copy_sec_ctx(xp->security, skb);
1131 static inline size_t userpolicy_type_attrsize(void)
1133 #ifdef CONFIG_XFRM_SUB_POLICY
1134 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1140 #ifdef CONFIG_XFRM_SUB_POLICY
1141 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1143 struct xfrm_userpolicy_type upt = {
1147 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1151 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1157 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1159 struct xfrm_dump_info *sp = ptr;
1160 struct xfrm_userpolicy_info *p;
1161 struct sk_buff *in_skb = sp->in_skb;
1162 struct sk_buff *skb = sp->out_skb;
1163 struct nlmsghdr *nlh;
1165 if (sp->this_idx < sp->start_idx)
1168 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1169 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1173 p = nlmsg_data(nlh);
1174 copy_to_user_policy(xp, p, dir);
1175 if (copy_to_user_tmpl(xp, skb) < 0)
1177 if (copy_to_user_sec_ctx(xp, skb))
1179 if (copy_to_user_policy_type(xp->type, skb) < 0)
1182 nlmsg_end(skb, nlh);
1188 nlmsg_cancel(skb, nlh);
1192 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1194 struct xfrm_dump_info info;
1196 info.in_skb = cb->skb;
1198 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1199 info.nlmsg_flags = NLM_F_MULTI;
1201 info.start_idx = cb->args[0];
1202 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1203 #ifdef CONFIG_XFRM_SUB_POLICY
1204 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1206 cb->args[0] = info.this_idx;
1211 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1212 struct xfrm_policy *xp,
1215 struct xfrm_dump_info info;
1216 struct sk_buff *skb;
1218 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1220 return ERR_PTR(-ENOMEM);
1222 info.in_skb = in_skb;
1224 info.nlmsg_seq = seq;
1225 info.nlmsg_flags = 0;
1226 info.this_idx = info.start_idx = 0;
1228 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1236 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1237 struct nlattr **attrs)
1239 struct xfrm_policy *xp;
1240 struct xfrm_userpolicy_id *p;
1241 u8 type = XFRM_POLICY_TYPE_MAIN;
1246 p = nlmsg_data(nlh);
1247 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1249 err = copy_from_user_policy_type(&type, attrs);
1253 err = verify_policy_dir(p->dir);
1258 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1260 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1261 struct xfrm_policy tmp;
1263 err = verify_sec_ctx_len(attrs);
1267 memset(&tmp, 0, sizeof(struct xfrm_policy));
1269 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1271 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1274 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1276 security_xfrm_policy_free(&tmp);
1282 struct sk_buff *resp_skb;
1284 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1285 if (IS_ERR(resp_skb)) {
1286 err = PTR_ERR(resp_skb);
1288 err = nlmsg_unicast(xfrm_nl, resp_skb,
1289 NETLINK_CB(skb).pid);
1292 xfrm_audit_policy_delete(xp, err ? 0 : 1,
1293 NETLINK_CB(skb).loginuid,
1294 NETLINK_CB(skb).sid);
1299 c.data.byid = p->index;
1300 c.event = nlh->nlmsg_type;
1301 c.seq = nlh->nlmsg_seq;
1302 c.pid = nlh->nlmsg_pid;
1303 km_policy_notify(xp, p->dir, &c);
1311 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1312 struct nlattr **attrs)
1315 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1316 struct xfrm_audit audit_info;
1319 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1320 audit_info.secid = NETLINK_CB(skb).sid;
1321 err = xfrm_state_flush(p->proto, &audit_info);
1324 c.data.proto = p->proto;
1325 c.event = nlh->nlmsg_type;
1326 c.seq = nlh->nlmsg_seq;
1327 c.pid = nlh->nlmsg_pid;
1328 km_state_notify(NULL, &c);
1333 static inline size_t xfrm_aevent_msgsize(void)
1335 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1336 + nla_total_size(sizeof(struct xfrm_replay_state))
1337 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1338 + nla_total_size(4) /* XFRM_AE_RTHR */
1339 + nla_total_size(4); /* XFRM_AE_ETHR */
1342 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1344 struct xfrm_aevent_id *id;
1345 struct nlmsghdr *nlh;
1347 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1351 id = nlmsg_data(nlh);
1352 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1353 id->sa_id.spi = x->id.spi;
1354 id->sa_id.family = x->props.family;
1355 id->sa_id.proto = x->id.proto;
1356 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1357 id->reqid = x->props.reqid;
1358 id->flags = c->data.aevent;
1360 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1361 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1363 if (id->flags & XFRM_AE_RTHR)
1364 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1366 if (id->flags & XFRM_AE_ETHR)
1367 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1368 x->replay_maxage * 10 / HZ);
1370 return nlmsg_end(skb, nlh);
1373 nlmsg_cancel(skb, nlh);
1377 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1378 struct nlattr **attrs)
1380 struct xfrm_state *x;
1381 struct sk_buff *r_skb;
1384 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1385 struct xfrm_usersa_id *id = &p->sa_id;
1387 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1391 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1398 * XXX: is this lock really needed - none of the other
1399 * gets lock (the concern is things getting updated
1400 * while we are still reading) - jhs
1402 spin_lock_bh(&x->lock);
1403 c.data.aevent = p->flags;
1404 c.seq = nlh->nlmsg_seq;
1405 c.pid = nlh->nlmsg_pid;
1407 if (build_aevent(r_skb, x, &c) < 0)
1409 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
1410 spin_unlock_bh(&x->lock);
1415 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1416 struct nlattr **attrs)
1418 struct xfrm_state *x;
1421 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1422 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1423 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1428 /* pedantic mode - thou shalt sayeth replaceth */
1429 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1432 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1436 if (x->km.state != XFRM_STATE_VALID)
1439 spin_lock_bh(&x->lock);
1440 xfrm_update_ae_params(x, attrs);
1441 spin_unlock_bh(&x->lock);
1443 c.event = nlh->nlmsg_type;
1444 c.seq = nlh->nlmsg_seq;
1445 c.pid = nlh->nlmsg_pid;
1446 c.data.aevent = XFRM_AE_CU;
1447 km_state_notify(x, &c);
1454 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1455 struct nlattr **attrs)
1458 u8 type = XFRM_POLICY_TYPE_MAIN;
1460 struct xfrm_audit audit_info;
1462 err = copy_from_user_policy_type(&type, attrs);
1466 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1467 audit_info.secid = NETLINK_CB(skb).sid;
1468 err = xfrm_policy_flush(type, &audit_info);
1472 c.event = nlh->nlmsg_type;
1473 c.seq = nlh->nlmsg_seq;
1474 c.pid = nlh->nlmsg_pid;
1475 km_policy_notify(NULL, 0, &c);
1479 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1480 struct nlattr **attrs)
1482 struct xfrm_policy *xp;
1483 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1484 struct xfrm_userpolicy_info *p = &up->pol;
1485 u8 type = XFRM_POLICY_TYPE_MAIN;
1488 err = copy_from_user_policy_type(&type, attrs);
1493 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1495 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1496 struct xfrm_policy tmp;
1498 err = verify_sec_ctx_len(attrs);
1502 memset(&tmp, 0, sizeof(struct xfrm_policy));
1504 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1506 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1509 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1511 security_xfrm_policy_free(&tmp);
1516 read_lock(&xp->lock);
1518 read_unlock(&xp->lock);
1522 read_unlock(&xp->lock);
1525 xfrm_policy_delete(xp, p->dir);
1526 xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid,
1527 NETLINK_CB(skb).sid);
1530 // reset the timers here?
1531 printk("Dont know what to do with soft policy expire\n");
1533 km_policy_expired(xp, p->dir, up->hard, current->pid);
1540 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1541 struct nlattr **attrs)
1543 struct xfrm_state *x;
1545 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1546 struct xfrm_usersa_info *p = &ue->state;
1548 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1554 spin_lock_bh(&x->lock);
1556 if (x->km.state != XFRM_STATE_VALID)
1558 km_state_expired(x, ue->hard, current->pid);
1561 __xfrm_state_delete(x);
1562 xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid,
1563 NETLINK_CB(skb).sid);
1567 spin_unlock_bh(&x->lock);
1572 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1573 struct nlattr **attrs)
1575 struct xfrm_policy *xp;
1576 struct xfrm_user_tmpl *ut;
1578 struct nlattr *rt = attrs[XFRMA_TMPL];
1580 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1581 struct xfrm_state *x = xfrm_state_alloc();
1587 err = verify_newpolicy_info(&ua->policy);
1589 printk("BAD policy passed\n");
1595 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
1601 memcpy(&x->id, &ua->id, sizeof(ua->id));
1602 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1603 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1606 /* extract the templates and for each call km_key */
1607 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1608 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1609 memcpy(&x->id, &t->id, sizeof(x->id));
1610 x->props.mode = t->mode;
1611 x->props.reqid = t->reqid;
1612 x->props.family = ut->family;
1613 t->aalgos = ua->aalgos;
1614 t->ealgos = ua->ealgos;
1615 t->calgos = ua->calgos;
1616 err = km_query(x, t, xp);
1626 #ifdef CONFIG_XFRM_MIGRATE
1627 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1628 struct nlattr **attrs, int *num)
1630 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1631 struct xfrm_user_migrate *um;
1635 num_migrate = nla_len(rt) / sizeof(*um);
1637 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1640 for (i = 0; i < num_migrate; i++, um++, ma++) {
1641 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1642 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1643 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1644 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1646 ma->proto = um->proto;
1647 ma->mode = um->mode;
1648 ma->reqid = um->reqid;
1650 ma->old_family = um->old_family;
1651 ma->new_family = um->new_family;
1658 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1659 struct nlattr **attrs)
1661 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1662 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1667 if (attrs[XFRMA_MIGRATE] == NULL)
1670 err = copy_from_user_policy_type(&type, attrs);
1674 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1682 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1687 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1688 struct nlattr **attrs)
1690 return -ENOPROTOOPT;
1694 #ifdef CONFIG_XFRM_MIGRATE
1695 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1697 struct xfrm_user_migrate um;
1699 memset(&um, 0, sizeof(um));
1700 um.proto = m->proto;
1702 um.reqid = m->reqid;
1703 um.old_family = m->old_family;
1704 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1705 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1706 um.new_family = m->new_family;
1707 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1708 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1710 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
1713 static inline size_t xfrm_migrate_msgsize(int num_migrate)
1715 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1716 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1717 + userpolicy_type_attrsize();
1720 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1721 int num_migrate, struct xfrm_selector *sel,
1724 struct xfrm_migrate *mp;
1725 struct xfrm_userpolicy_id *pol_id;
1726 struct nlmsghdr *nlh;
1729 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1733 pol_id = nlmsg_data(nlh);
1734 /* copy data from selector, dir, and type to the pol_id */
1735 memset(pol_id, 0, sizeof(*pol_id));
1736 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1739 if (copy_to_user_policy_type(type, skb) < 0)
1742 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1743 if (copy_to_user_migrate(mp, skb) < 0)
1747 return nlmsg_end(skb, nlh);
1749 nlmsg_cancel(skb, nlh);
1753 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1754 struct xfrm_migrate *m, int num_migrate)
1756 struct sk_buff *skb;
1758 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
1763 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1766 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
1769 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1770 struct xfrm_migrate *m, int num_migrate)
1772 return -ENOPROTOOPT;
1776 #define XMSGSIZE(type) sizeof(struct type)
1778 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1779 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1780 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1781 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1782 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1783 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1784 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1785 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1786 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1787 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1788 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1789 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1790 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1791 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1792 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
1793 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1794 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1795 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1796 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1797 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1798 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1803 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1804 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1805 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1806 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1807 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1808 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1809 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1810 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1811 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1812 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1813 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1814 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1815 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1816 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1817 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1820 static struct xfrm_link {
1821 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1822 int (*dump)(struct sk_buff *, struct netlink_callback *);
1823 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1824 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1825 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1826 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1827 .dump = xfrm_dump_sa },
1828 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1829 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1830 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1831 .dump = xfrm_dump_policy },
1832 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1833 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1834 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1835 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1836 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1837 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1838 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1839 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1840 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1841 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1842 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1843 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1844 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1847 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1849 struct nlattr *attrs[XFRMA_MAX+1];
1850 struct xfrm_link *link;
1853 type = nlh->nlmsg_type;
1854 if (type > XFRM_MSG_MAX)
1857 type -= XFRM_MSG_BASE;
1858 link = &xfrm_dispatch[type];
1860 /* All operations require privileges, even GET */
1861 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1864 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1865 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1866 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1867 if (link->dump == NULL)
1870 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1873 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
1878 if (link->doit == NULL)
1881 return link->doit(skb, nlh, attrs);
1884 static void xfrm_netlink_rcv(struct sock *sk, int len)
1886 unsigned int qlen = 0;
1889 mutex_lock(&xfrm_cfg_mutex);
1890 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1891 mutex_unlock(&xfrm_cfg_mutex);
1896 static inline size_t xfrm_expire_msgsize(void)
1898 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1901 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1903 struct xfrm_user_expire *ue;
1904 struct nlmsghdr *nlh;
1906 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1910 ue = nlmsg_data(nlh);
1911 copy_to_user_state(x, &ue->state);
1912 ue->hard = (c->data.hard != 0) ? 1 : 0;
1914 return nlmsg_end(skb, nlh);
1917 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1919 struct sk_buff *skb;
1921 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1925 if (build_expire(skb, x, c) < 0)
1928 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1931 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1933 struct sk_buff *skb;
1935 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1939 if (build_aevent(skb, x, c) < 0)
1942 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1945 static int xfrm_notify_sa_flush(struct km_event *c)
1947 struct xfrm_usersa_flush *p;
1948 struct nlmsghdr *nlh;
1949 struct sk_buff *skb;
1950 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
1952 skb = nlmsg_new(len, GFP_ATOMIC);
1956 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
1962 p = nlmsg_data(nlh);
1963 p->proto = c->data.proto;
1965 nlmsg_end(skb, nlh);
1967 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1970 static inline size_t xfrm_sa_len(struct xfrm_state *x)
1974 l += nla_total_size(alg_len(x->aalg));
1976 l += nla_total_size(alg_len(x->ealg));
1978 l += nla_total_size(sizeof(*x->calg));
1980 l += nla_total_size(sizeof(*x->encap));
1985 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
1987 struct xfrm_usersa_info *p;
1988 struct xfrm_usersa_id *id;
1989 struct nlmsghdr *nlh;
1990 struct sk_buff *skb;
1991 int len = xfrm_sa_len(x);
1994 headlen = sizeof(*p);
1995 if (c->event == XFRM_MSG_DELSA) {
1996 len += nla_total_size(headlen);
1997 headlen = sizeof(*id);
1999 len += NLMSG_ALIGN(headlen);
2001 skb = nlmsg_new(len, GFP_ATOMIC);
2005 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2007 goto nla_put_failure;
2009 p = nlmsg_data(nlh);
2010 if (c->event == XFRM_MSG_DELSA) {
2011 struct nlattr *attr;
2013 id = nlmsg_data(nlh);
2014 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2015 id->spi = x->id.spi;
2016 id->family = x->props.family;
2017 id->proto = x->id.proto;
2019 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2021 goto nla_put_failure;
2026 copy_to_user_state(x, p);
2029 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
2031 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
2033 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2036 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2038 nlmsg_end(skb, nlh);
2040 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2047 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2051 case XFRM_MSG_EXPIRE:
2052 return xfrm_exp_state_notify(x, c);
2053 case XFRM_MSG_NEWAE:
2054 return xfrm_aevent_state_notify(x, c);
2055 case XFRM_MSG_DELSA:
2056 case XFRM_MSG_UPDSA:
2057 case XFRM_MSG_NEWSA:
2058 return xfrm_notify_sa(x, c);
2059 case XFRM_MSG_FLUSHSA:
2060 return xfrm_notify_sa_flush(c);
2062 printk("xfrm_user: Unknown SA event %d\n", c->event);
2070 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2071 struct xfrm_policy *xp)
2073 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2074 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2075 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2076 + userpolicy_type_attrsize();
2079 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2080 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2083 struct xfrm_user_acquire *ua;
2084 struct nlmsghdr *nlh;
2085 __u32 seq = xfrm_get_acqseq();
2087 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2091 ua = nlmsg_data(nlh);
2092 memcpy(&ua->id, &x->id, sizeof(ua->id));
2093 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2094 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2095 copy_to_user_policy(xp, &ua->policy, dir);
2096 ua->aalgos = xt->aalgos;
2097 ua->ealgos = xt->ealgos;
2098 ua->calgos = xt->calgos;
2099 ua->seq = x->km.seq = seq;
2101 if (copy_to_user_tmpl(xp, skb) < 0)
2103 if (copy_to_user_state_sec_ctx(x, skb))
2105 if (copy_to_user_policy_type(xp->type, skb) < 0)
2108 return nlmsg_end(skb, nlh);
2111 nlmsg_cancel(skb, nlh);
2115 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2116 struct xfrm_policy *xp, int dir)
2118 struct sk_buff *skb;
2120 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2124 if (build_acquire(skb, x, xt, xp, dir) < 0)
2127 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2130 /* User gives us xfrm_user_policy_info followed by an array of 0
2131 * or more templates.
2133 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2134 u8 *data, int len, int *dir)
2136 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2137 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2138 struct xfrm_policy *xp;
2141 switch (sk->sk_family) {
2143 if (opt != IP_XFRM_POLICY) {
2148 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2150 if (opt != IPV6_XFRM_POLICY) {
2163 if (len < sizeof(*p) ||
2164 verify_newpolicy_info(p))
2167 nr = ((len - sizeof(*p)) / sizeof(*ut));
2168 if (validate_tmpl(nr, ut, p->sel.family))
2171 if (p->dir > XFRM_POLICY_OUT)
2174 xp = xfrm_policy_alloc(GFP_KERNEL);
2180 copy_from_user_policy(xp, p);
2181 xp->type = XFRM_POLICY_TYPE_MAIN;
2182 copy_templates(xp, ut, nr);
2189 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2191 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2192 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2193 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2194 + userpolicy_type_attrsize();
2197 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2198 int dir, struct km_event *c)
2200 struct xfrm_user_polexpire *upe;
2201 struct nlmsghdr *nlh;
2202 int hard = c->data.hard;
2204 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2208 upe = nlmsg_data(nlh);
2209 copy_to_user_policy(xp, &upe->pol, dir);
2210 if (copy_to_user_tmpl(xp, skb) < 0)
2212 if (copy_to_user_sec_ctx(xp, skb))
2214 if (copy_to_user_policy_type(xp->type, skb) < 0)
2218 return nlmsg_end(skb, nlh);
2221 nlmsg_cancel(skb, nlh);
2225 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2227 struct sk_buff *skb;
2229 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2233 if (build_polexpire(skb, xp, dir, c) < 0)
2236 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2239 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2241 struct xfrm_userpolicy_info *p;
2242 struct xfrm_userpolicy_id *id;
2243 struct nlmsghdr *nlh;
2244 struct sk_buff *skb;
2245 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2248 headlen = sizeof(*p);
2249 if (c->event == XFRM_MSG_DELPOLICY) {
2250 len += nla_total_size(headlen);
2251 headlen = sizeof(*id);
2253 len += userpolicy_type_attrsize();
2254 len += NLMSG_ALIGN(headlen);
2256 skb = nlmsg_new(len, GFP_ATOMIC);
2260 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2264 p = nlmsg_data(nlh);
2265 if (c->event == XFRM_MSG_DELPOLICY) {
2266 struct nlattr *attr;
2268 id = nlmsg_data(nlh);
2269 memset(id, 0, sizeof(*id));
2272 id->index = xp->index;
2274 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2276 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2283 copy_to_user_policy(xp, p, dir);
2284 if (copy_to_user_tmpl(xp, skb) < 0)
2286 if (copy_to_user_policy_type(xp->type, skb) < 0)
2289 nlmsg_end(skb, nlh);
2291 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2298 static int xfrm_notify_policy_flush(struct km_event *c)
2300 struct nlmsghdr *nlh;
2301 struct sk_buff *skb;
2303 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2307 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2310 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2313 nlmsg_end(skb, nlh);
2315 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2322 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2326 case XFRM_MSG_NEWPOLICY:
2327 case XFRM_MSG_UPDPOLICY:
2328 case XFRM_MSG_DELPOLICY:
2329 return xfrm_notify_policy(xp, dir, c);
2330 case XFRM_MSG_FLUSHPOLICY:
2331 return xfrm_notify_policy_flush(c);
2332 case XFRM_MSG_POLEXPIRE:
2333 return xfrm_exp_policy_notify(xp, dir, c);
2335 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2342 static inline size_t xfrm_report_msgsize(void)
2344 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2347 static int build_report(struct sk_buff *skb, u8 proto,
2348 struct xfrm_selector *sel, xfrm_address_t *addr)
2350 struct xfrm_user_report *ur;
2351 struct nlmsghdr *nlh;
2353 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2357 ur = nlmsg_data(nlh);
2359 memcpy(&ur->sel, sel, sizeof(ur->sel));
2362 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2364 return nlmsg_end(skb, nlh);
2367 nlmsg_cancel(skb, nlh);
2371 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2372 xfrm_address_t *addr)
2374 struct sk_buff *skb;
2376 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2380 if (build_report(skb, proto, sel, addr) < 0)
2383 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2386 static struct xfrm_mgr netlink_mgr = {
2388 .notify = xfrm_send_state_notify,
2389 .acquire = xfrm_send_acquire,
2390 .compile_policy = xfrm_compile_policy,
2391 .notify_policy = xfrm_send_policy_notify,
2392 .report = xfrm_send_report,
2393 .migrate = xfrm_send_migrate,
2396 static int __init xfrm_user_init(void)
2400 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2402 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2403 xfrm_netlink_rcv, NULL, THIS_MODULE);
2406 rcu_assign_pointer(xfrm_nl, nlsk);
2408 xfrm_register_km(&netlink_mgr);
2413 static void __exit xfrm_user_exit(void)
2415 struct sock *nlsk = xfrm_nl;
2417 xfrm_unregister_km(&netlink_mgr);
2418 rcu_assign_pointer(xfrm_nl, NULL);
2420 sock_release(nlsk->sk_socket);
2423 module_init(xfrm_user_init);
2424 module_exit(xfrm_user_exit);
2425 MODULE_LICENSE("GPL");
2426 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);