1 /* xfrm_user.c: User interface to configure xfrm engine.
7 * Kazunori MIYAZAWA @USAGI
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>
30 #include <asm/uaccess.h>
31 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32 #include <linux/in6.h>
35 static inline int aead_len(struct xfrm_algo_aead *alg)
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
40 static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
42 struct nlattr *rt = attrs[type];
43 struct xfrm_algo *algp;
49 if (nla_len(rt) < xfrm_alg_len(algp))
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
66 static int verify_auth_trunc(struct nlattr **attrs)
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
82 static int verify_aead(struct nlattr **attrs)
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
91 if (nla_len(rt) < aead_len(algp))
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
98 static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
99 xfrm_address_t **addrp)
101 struct nlattr *rt = attrs[type];
104 *addrp = nla_data(rt);
107 static inline int verify_sec_ctx_len(struct nlattr **attrs)
109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
110 struct xfrm_user_sec_ctx *uctx;
116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
123 static int verify_newsa_info(struct xfrm_usersa_info *p,
124 struct nlattr **attrs)
134 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
146 switch (p->id.proto) {
148 if ((!attrs[XFRMA_ALG_AUTH] &&
149 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
150 attrs[XFRMA_ALG_AEAD] ||
151 attrs[XFRMA_ALG_CRYPT] ||
152 attrs[XFRMA_ALG_COMP] ||
158 if (attrs[XFRMA_ALG_COMP])
160 if (!attrs[XFRMA_ALG_AUTH] &&
161 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
162 !attrs[XFRMA_ALG_CRYPT] &&
163 !attrs[XFRMA_ALG_AEAD])
165 if ((attrs[XFRMA_ALG_AUTH] ||
166 attrs[XFRMA_ALG_AUTH_TRUNC] ||
167 attrs[XFRMA_ALG_CRYPT]) &&
168 attrs[XFRMA_ALG_AEAD])
170 if (attrs[XFRMA_TFCPAD] &&
171 p->mode != XFRM_MODE_TUNNEL)
176 if (!attrs[XFRMA_ALG_COMP] ||
177 attrs[XFRMA_ALG_AEAD] ||
178 attrs[XFRMA_ALG_AUTH] ||
179 attrs[XFRMA_ALG_AUTH_TRUNC] ||
180 attrs[XFRMA_ALG_CRYPT] ||
185 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
186 case IPPROTO_DSTOPTS:
187 case IPPROTO_ROUTING:
188 if (attrs[XFRMA_ALG_COMP] ||
189 attrs[XFRMA_ALG_AUTH] ||
190 attrs[XFRMA_ALG_AUTH_TRUNC] ||
191 attrs[XFRMA_ALG_AEAD] ||
192 attrs[XFRMA_ALG_CRYPT] ||
193 attrs[XFRMA_ENCAP] ||
194 attrs[XFRMA_SEC_CTX] ||
195 attrs[XFRMA_TFCPAD] ||
196 !attrs[XFRMA_COADDR])
205 if ((err = verify_aead(attrs)))
207 if ((err = verify_auth_trunc(attrs)))
209 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
211 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
213 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
215 if ((err = verify_sec_ctx_len(attrs)))
220 case XFRM_MODE_TRANSPORT:
221 case XFRM_MODE_TUNNEL:
222 case XFRM_MODE_ROUTEOPTIMIZATION:
236 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
237 struct xfrm_algo_desc *(*get_byname)(char *, int),
240 struct xfrm_algo *p, *ualg;
241 struct xfrm_algo_desc *algo;
246 ualg = nla_data(rta);
248 algo = get_byname(ualg->alg_name, 1);
251 *props = algo->desc.sadb_alg_id;
253 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
257 strcpy(p->alg_name, algo->name);
262 static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
265 struct xfrm_algo *ualg;
266 struct xfrm_algo_auth *p;
267 struct xfrm_algo_desc *algo;
272 ualg = nla_data(rta);
274 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
277 *props = algo->desc.sadb_alg_id;
279 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
283 strcpy(p->alg_name, algo->name);
284 p->alg_key_len = ualg->alg_key_len;
285 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
286 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
292 static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
295 struct xfrm_algo_auth *p, *ualg;
296 struct xfrm_algo_desc *algo;
301 ualg = nla_data(rta);
303 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
306 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
307 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
309 *props = algo->desc.sadb_alg_id;
311 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
315 strcpy(p->alg_name, algo->name);
316 if (!p->alg_trunc_len)
317 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
323 static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
326 struct xfrm_algo_aead *p, *ualg;
327 struct xfrm_algo_desc *algo;
332 ualg = nla_data(rta);
334 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
337 *props = algo->desc.sadb_alg_id;
339 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
343 strcpy(p->alg_name, algo->name);
348 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
353 len += sizeof(struct xfrm_user_sec_ctx);
354 len += xfrm_ctx->ctx_len;
359 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
361 memcpy(&x->id, &p->id, sizeof(x->id));
362 memcpy(&x->sel, &p->sel, sizeof(x->sel));
363 memcpy(&x->lft, &p->lft, sizeof(x->lft));
364 x->props.mode = p->mode;
365 x->props.replay_window = p->replay_window;
366 x->props.reqid = p->reqid;
367 x->props.family = p->family;
368 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
369 x->props.flags = p->flags;
371 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
372 x->sel.family = p->family;
376 * someday when pfkey also has support, we could have the code
377 * somehow made shareable and move it to xfrm_state.c - JHS
380 static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
382 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
383 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
384 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
385 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
388 struct xfrm_replay_state *replay;
389 replay = nla_data(rp);
390 memcpy(&x->replay, replay, sizeof(*replay));
391 memcpy(&x->preplay, replay, sizeof(*replay));
395 struct xfrm_lifetime_cur *ltime;
396 ltime = nla_data(lt);
397 x->curlft.bytes = ltime->bytes;
398 x->curlft.packets = ltime->packets;
399 x->curlft.add_time = ltime->add_time;
400 x->curlft.use_time = ltime->use_time;
404 x->replay_maxage = nla_get_u32(et);
407 x->replay_maxdiff = nla_get_u32(rt);
410 static struct xfrm_state *xfrm_state_construct(struct net *net,
411 struct xfrm_usersa_info *p,
412 struct nlattr **attrs,
415 struct xfrm_state *x = xfrm_state_alloc(net);
421 copy_from_user_state(x, p);
423 if ((err = attach_aead(&x->aead, &x->props.ealgo,
424 attrs[XFRMA_ALG_AEAD])))
426 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
427 attrs[XFRMA_ALG_AUTH_TRUNC])))
429 if (!x->props.aalgo) {
430 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
431 attrs[XFRMA_ALG_AUTH])))
434 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
435 xfrm_ealg_get_byname,
436 attrs[XFRMA_ALG_CRYPT])))
438 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
439 xfrm_calg_get_byname,
440 attrs[XFRMA_ALG_COMP])))
443 if (attrs[XFRMA_ENCAP]) {
444 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
445 sizeof(*x->encap), GFP_KERNEL);
446 if (x->encap == NULL)
450 if (attrs[XFRMA_TFCPAD])
451 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
453 if (attrs[XFRMA_COADDR]) {
454 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
455 sizeof(*x->coaddr), GFP_KERNEL);
456 if (x->coaddr == NULL)
460 xfrm_mark_get(attrs, &x->mark);
462 err = xfrm_init_state(x);
466 if (attrs[XFRMA_SEC_CTX] &&
467 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
471 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
472 /* sysctl_xfrm_aevent_etime is in 100ms units */
473 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
474 x->preplay.bitmap = 0;
475 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
476 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
478 /* override default values from above */
480 xfrm_update_ae_params(x, attrs);
485 x->km.state = XFRM_STATE_DEAD;
492 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
493 struct nlattr **attrs)
495 struct net *net = sock_net(skb->sk);
496 struct xfrm_usersa_info *p = nlmsg_data(nlh);
497 struct xfrm_state *x;
500 uid_t loginuid = NETLINK_CB(skb).loginuid;
501 u32 sessionid = NETLINK_CB(skb).sessionid;
502 u32 sid = NETLINK_CB(skb).sid;
504 err = verify_newsa_info(p, attrs);
508 x = xfrm_state_construct(net, p, attrs, &err);
513 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
514 err = xfrm_state_add(x);
516 err = xfrm_state_update(x);
518 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
521 x->km.state = XFRM_STATE_DEAD;
526 c.seq = nlh->nlmsg_seq;
527 c.pid = nlh->nlmsg_pid;
528 c.event = nlh->nlmsg_type;
530 km_state_notify(x, &c);
536 static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
537 struct xfrm_usersa_id *p,
538 struct nlattr **attrs,
541 struct xfrm_state *x = NULL;
544 u32 mark = xfrm_mark_get(attrs, &m);
546 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
548 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
550 xfrm_address_t *saddr = NULL;
552 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
559 x = xfrm_state_lookup_byaddr(net, mark,
561 p->proto, p->family);
570 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
571 struct nlattr **attrs)
573 struct net *net = sock_net(skb->sk);
574 struct xfrm_state *x;
577 struct xfrm_usersa_id *p = nlmsg_data(nlh);
578 uid_t loginuid = NETLINK_CB(skb).loginuid;
579 u32 sessionid = NETLINK_CB(skb).sessionid;
580 u32 sid = NETLINK_CB(skb).sid;
582 x = xfrm_user_state_lookup(net, p, attrs, &err);
586 if ((err = security_xfrm_state_delete(x)) != 0)
589 if (xfrm_state_kern(x)) {
594 err = xfrm_state_delete(x);
599 c.seq = nlh->nlmsg_seq;
600 c.pid = nlh->nlmsg_pid;
601 c.event = nlh->nlmsg_type;
602 km_state_notify(x, &c);
605 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
610 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
612 memcpy(&p->id, &x->id, sizeof(p->id));
613 memcpy(&p->sel, &x->sel, sizeof(p->sel));
614 memcpy(&p->lft, &x->lft, sizeof(p->lft));
615 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
616 memcpy(&p->stats, &x->stats, sizeof(p->stats));
617 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
618 p->mode = x->props.mode;
619 p->replay_window = x->props.replay_window;
620 p->reqid = x->props.reqid;
621 p->family = x->props.family;
622 p->flags = x->props.flags;
626 struct xfrm_dump_info {
627 struct sk_buff *in_skb;
628 struct sk_buff *out_skb;
633 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
635 struct xfrm_user_sec_ctx *uctx;
637 int ctx_size = sizeof(*uctx) + s->ctx_len;
639 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
643 uctx = nla_data(attr);
644 uctx->exttype = XFRMA_SEC_CTX;
645 uctx->len = ctx_size;
646 uctx->ctx_doi = s->ctx_doi;
647 uctx->ctx_alg = s->ctx_alg;
648 uctx->ctx_len = s->ctx_len;
649 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
654 static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
656 struct xfrm_algo *algo;
659 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
660 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
664 algo = nla_data(nla);
665 strcpy(algo->alg_name, auth->alg_name);
666 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
667 algo->alg_key_len = auth->alg_key_len;
672 /* Don't change this without updating xfrm_sa_len! */
673 static int copy_to_user_state_extra(struct xfrm_state *x,
674 struct xfrm_usersa_info *p,
677 copy_to_user_state(x, p);
680 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
683 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
686 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
688 if (copy_to_user_auth(x->aalg, skb))
689 goto nla_put_failure;
691 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
692 xfrm_alg_auth_len(x->aalg), x->aalg);
695 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
697 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
700 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
703 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
705 if (xfrm_mark_put(skb, &x->mark))
706 goto nla_put_failure;
708 if (x->security && copy_sec_ctx(x->security, skb) < 0)
709 goto nla_put_failure;
717 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
719 struct xfrm_dump_info *sp = ptr;
720 struct sk_buff *in_skb = sp->in_skb;
721 struct sk_buff *skb = sp->out_skb;
722 struct xfrm_usersa_info *p;
723 struct nlmsghdr *nlh;
726 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
727 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
733 err = copy_to_user_state_extra(x, p, skb);
735 goto nla_put_failure;
741 nlmsg_cancel(skb, nlh);
745 static int xfrm_dump_sa_done(struct netlink_callback *cb)
747 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
748 xfrm_state_walk_done(walk);
752 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
754 struct net *net = sock_net(skb->sk);
755 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
756 struct xfrm_dump_info info;
758 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
759 sizeof(cb->args) - sizeof(cb->args[0]));
761 info.in_skb = cb->skb;
763 info.nlmsg_seq = cb->nlh->nlmsg_seq;
764 info.nlmsg_flags = NLM_F_MULTI;
768 xfrm_state_walk_init(walk, 0);
771 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
776 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
777 struct xfrm_state *x, u32 seq)
779 struct xfrm_dump_info info;
782 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
784 return ERR_PTR(-ENOMEM);
786 info.in_skb = in_skb;
788 info.nlmsg_seq = seq;
789 info.nlmsg_flags = 0;
791 if (dump_one_state(x, 0, &info)) {
799 static inline size_t xfrm_spdinfo_msgsize(void)
801 return NLMSG_ALIGN(4)
802 + nla_total_size(sizeof(struct xfrmu_spdinfo))
803 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
806 static int build_spdinfo(struct sk_buff *skb, struct net *net,
807 u32 pid, u32 seq, u32 flags)
809 struct xfrmk_spdinfo si;
810 struct xfrmu_spdinfo spc;
811 struct xfrmu_spdhinfo sph;
812 struct nlmsghdr *nlh;
815 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
816 if (nlh == NULL) /* shouldnt really happen ... */
821 xfrm_spd_getinfo(net, &si);
822 spc.incnt = si.incnt;
823 spc.outcnt = si.outcnt;
824 spc.fwdcnt = si.fwdcnt;
825 spc.inscnt = si.inscnt;
826 spc.outscnt = si.outscnt;
827 spc.fwdscnt = si.fwdscnt;
828 sph.spdhcnt = si.spdhcnt;
829 sph.spdhmcnt = si.spdhmcnt;
831 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
832 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
834 return nlmsg_end(skb, nlh);
837 nlmsg_cancel(skb, nlh);
841 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
842 struct nlattr **attrs)
844 struct net *net = sock_net(skb->sk);
845 struct sk_buff *r_skb;
846 u32 *flags = nlmsg_data(nlh);
847 u32 spid = NETLINK_CB(skb).pid;
848 u32 seq = nlh->nlmsg_seq;
850 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
854 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
857 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
860 static inline size_t xfrm_sadinfo_msgsize(void)
862 return NLMSG_ALIGN(4)
863 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
864 + nla_total_size(4); /* XFRMA_SAD_CNT */
867 static int build_sadinfo(struct sk_buff *skb, struct net *net,
868 u32 pid, u32 seq, u32 flags)
870 struct xfrmk_sadinfo si;
871 struct xfrmu_sadhinfo sh;
872 struct nlmsghdr *nlh;
875 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
876 if (nlh == NULL) /* shouldnt really happen ... */
881 xfrm_sad_getinfo(net, &si);
883 sh.sadhmcnt = si.sadhmcnt;
884 sh.sadhcnt = si.sadhcnt;
886 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
887 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
889 return nlmsg_end(skb, nlh);
892 nlmsg_cancel(skb, nlh);
896 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
897 struct nlattr **attrs)
899 struct net *net = sock_net(skb->sk);
900 struct sk_buff *r_skb;
901 u32 *flags = nlmsg_data(nlh);
902 u32 spid = NETLINK_CB(skb).pid;
903 u32 seq = nlh->nlmsg_seq;
905 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
909 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
912 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
915 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
916 struct nlattr **attrs)
918 struct net *net = sock_net(skb->sk);
919 struct xfrm_usersa_id *p = nlmsg_data(nlh);
920 struct xfrm_state *x;
921 struct sk_buff *resp_skb;
924 x = xfrm_user_state_lookup(net, p, attrs, &err);
928 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
929 if (IS_ERR(resp_skb)) {
930 err = PTR_ERR(resp_skb);
932 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
939 static int verify_userspi_info(struct xfrm_userspi_info *p)
941 switch (p->info.id.proto) {
947 /* IPCOMP spi is 16-bits. */
948 if (p->max >= 0x10000)
962 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
963 struct nlattr **attrs)
965 struct net *net = sock_net(skb->sk);
966 struct xfrm_state *x;
967 struct xfrm_userspi_info *p;
968 struct sk_buff *resp_skb;
969 xfrm_address_t *daddr;
976 err = verify_userspi_info(p);
980 family = p->info.family;
981 daddr = &p->info.id.daddr;
985 mark = xfrm_mark_get(attrs, &m);
987 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
988 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
995 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
996 p->info.id.proto, daddr,
1003 err = xfrm_alloc_spi(x, p->min, p->max);
1007 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1008 if (IS_ERR(resp_skb)) {
1009 err = PTR_ERR(resp_skb);
1013 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1021 static int verify_policy_dir(u8 dir)
1024 case XFRM_POLICY_IN:
1025 case XFRM_POLICY_OUT:
1026 case XFRM_POLICY_FWD:
1036 static int verify_policy_type(u8 type)
1039 case XFRM_POLICY_TYPE_MAIN:
1040 #ifdef CONFIG_XFRM_SUB_POLICY
1041 case XFRM_POLICY_TYPE_SUB:
1052 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1055 case XFRM_SHARE_ANY:
1056 case XFRM_SHARE_SESSION:
1057 case XFRM_SHARE_USER:
1058 case XFRM_SHARE_UNIQUE:
1065 switch (p->action) {
1066 case XFRM_POLICY_ALLOW:
1067 case XFRM_POLICY_BLOCK:
1074 switch (p->sel.family) {
1079 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1082 return -EAFNOSUPPORT;
1089 return verify_policy_dir(p->dir);
1092 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
1094 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1095 struct xfrm_user_sec_ctx *uctx;
1100 uctx = nla_data(rt);
1101 return security_xfrm_policy_alloc(&pol->security, uctx);
1104 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1110 for (i = 0; i < nr; i++, ut++) {
1111 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1113 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1114 memcpy(&t->saddr, &ut->saddr,
1115 sizeof(xfrm_address_t));
1116 t->reqid = ut->reqid;
1118 t->share = ut->share;
1119 t->optional = ut->optional;
1120 t->aalgos = ut->aalgos;
1121 t->ealgos = ut->ealgos;
1122 t->calgos = ut->calgos;
1123 /* If all masks are ~0, then we allow all algorithms. */
1124 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
1125 t->encap_family = ut->family;
1129 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1133 if (nr > XFRM_MAX_DEPTH)
1136 for (i = 0; i < nr; i++) {
1137 /* We never validated the ut->family value, so many
1138 * applications simply leave it at zero. The check was
1139 * never made and ut->family was ignored because all
1140 * templates could be assumed to have the same family as
1141 * the policy itself. Now that we will have ipv4-in-ipv6
1142 * and ipv6-in-ipv4 tunnels, this is no longer true.
1145 ut[i].family = family;
1147 switch (ut[i].family) {
1150 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1162 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1164 struct nlattr *rt = attrs[XFRMA_TMPL];
1169 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1170 int nr = nla_len(rt) / sizeof(*utmpl);
1173 err = validate_tmpl(nr, utmpl, pol->family);
1177 copy_templates(pol, utmpl, nr);
1182 static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
1184 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
1185 struct xfrm_userpolicy_type *upt;
1186 u8 type = XFRM_POLICY_TYPE_MAIN;
1194 err = verify_policy_type(type);
1202 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1204 xp->priority = p->priority;
1205 xp->index = p->index;
1206 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1207 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1208 xp->action = p->action;
1209 xp->flags = p->flags;
1210 xp->family = p->sel.family;
1211 /* XXX xp->share = p->share; */
1214 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1216 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1217 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1218 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1219 p->priority = xp->priority;
1220 p->index = xp->index;
1221 p->sel.family = xp->family;
1223 p->action = xp->action;
1224 p->flags = xp->flags;
1225 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1228 static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1230 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1238 copy_from_user_policy(xp, p);
1240 err = copy_from_user_policy_type(&xp->type, attrs);
1244 if (!(err = copy_from_user_tmpl(xp, attrs)))
1245 err = copy_from_user_sec_ctx(xp, attrs);
1249 xfrm_mark_get(attrs, &xp->mark);
1255 xfrm_policy_destroy(xp);
1259 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1260 struct nlattr **attrs)
1262 struct net *net = sock_net(skb->sk);
1263 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1264 struct xfrm_policy *xp;
1268 uid_t loginuid = NETLINK_CB(skb).loginuid;
1269 u32 sessionid = NETLINK_CB(skb).sessionid;
1270 u32 sid = NETLINK_CB(skb).sid;
1272 err = verify_newpolicy_info(p);
1275 err = verify_sec_ctx_len(attrs);
1279 xp = xfrm_policy_construct(net, p, attrs, &err);
1283 /* shouldnt excl be based on nlh flags??
1284 * Aha! this is anti-netlink really i.e more pfkey derived
1285 * in netlink excl is a flag and you wouldnt need
1286 * a type XFRM_MSG_UPDPOLICY - JHS */
1287 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1288 err = xfrm_policy_insert(p->dir, xp, excl);
1289 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
1292 security_xfrm_policy_free(xp->security);
1297 c.event = nlh->nlmsg_type;
1298 c.seq = nlh->nlmsg_seq;
1299 c.pid = nlh->nlmsg_pid;
1300 km_policy_notify(xp, p->dir, &c);
1307 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1309 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1312 if (xp->xfrm_nr == 0)
1315 for (i = 0; i < xp->xfrm_nr; i++) {
1316 struct xfrm_user_tmpl *up = &vec[i];
1317 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1319 memcpy(&up->id, &kp->id, sizeof(up->id));
1320 up->family = kp->encap_family;
1321 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1322 up->reqid = kp->reqid;
1323 up->mode = kp->mode;
1324 up->share = kp->share;
1325 up->optional = kp->optional;
1326 up->aalgos = kp->aalgos;
1327 up->ealgos = kp->ealgos;
1328 up->calgos = kp->calgos;
1331 return nla_put(skb, XFRMA_TMPL,
1332 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
1335 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1338 return copy_sec_ctx(x->security, skb);
1343 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1346 return copy_sec_ctx(xp->security, skb);
1350 static inline size_t userpolicy_type_attrsize(void)
1352 #ifdef CONFIG_XFRM_SUB_POLICY
1353 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1359 #ifdef CONFIG_XFRM_SUB_POLICY
1360 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1362 struct xfrm_userpolicy_type upt = {
1366 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1370 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1376 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1378 struct xfrm_dump_info *sp = ptr;
1379 struct xfrm_userpolicy_info *p;
1380 struct sk_buff *in_skb = sp->in_skb;
1381 struct sk_buff *skb = sp->out_skb;
1382 struct nlmsghdr *nlh;
1384 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1385 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1389 p = nlmsg_data(nlh);
1390 copy_to_user_policy(xp, p, dir);
1391 if (copy_to_user_tmpl(xp, skb) < 0)
1393 if (copy_to_user_sec_ctx(xp, skb))
1395 if (copy_to_user_policy_type(xp->type, skb) < 0)
1397 if (xfrm_mark_put(skb, &xp->mark))
1398 goto nla_put_failure;
1400 nlmsg_end(skb, nlh);
1405 nlmsg_cancel(skb, nlh);
1409 static int xfrm_dump_policy_done(struct netlink_callback *cb)
1411 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1413 xfrm_policy_walk_done(walk);
1417 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1419 struct net *net = sock_net(skb->sk);
1420 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1421 struct xfrm_dump_info info;
1423 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1424 sizeof(cb->args) - sizeof(cb->args[0]));
1426 info.in_skb = cb->skb;
1428 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1429 info.nlmsg_flags = NLM_F_MULTI;
1433 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1436 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1441 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1442 struct xfrm_policy *xp,
1445 struct xfrm_dump_info info;
1446 struct sk_buff *skb;
1448 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1450 return ERR_PTR(-ENOMEM);
1452 info.in_skb = in_skb;
1454 info.nlmsg_seq = seq;
1455 info.nlmsg_flags = 0;
1457 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1465 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1466 struct nlattr **attrs)
1468 struct net *net = sock_net(skb->sk);
1469 struct xfrm_policy *xp;
1470 struct xfrm_userpolicy_id *p;
1471 u8 type = XFRM_POLICY_TYPE_MAIN;
1476 u32 mark = xfrm_mark_get(attrs, &m);
1478 p = nlmsg_data(nlh);
1479 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1481 err = copy_from_user_policy_type(&type, attrs);
1485 err = verify_policy_dir(p->dir);
1490 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
1492 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1493 struct xfrm_sec_ctx *ctx;
1495 err = verify_sec_ctx_len(attrs);
1501 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1503 err = security_xfrm_policy_alloc(&ctx, uctx);
1507 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
1509 security_xfrm_policy_free(ctx);
1515 struct sk_buff *resp_skb;
1517 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1518 if (IS_ERR(resp_skb)) {
1519 err = PTR_ERR(resp_skb);
1521 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
1522 NETLINK_CB(skb).pid);
1525 uid_t loginuid = NETLINK_CB(skb).loginuid;
1526 u32 sessionid = NETLINK_CB(skb).sessionid;
1527 u32 sid = NETLINK_CB(skb).sid;
1529 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1535 c.data.byid = p->index;
1536 c.event = nlh->nlmsg_type;
1537 c.seq = nlh->nlmsg_seq;
1538 c.pid = nlh->nlmsg_pid;
1539 km_policy_notify(xp, p->dir, &c);
1547 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1548 struct nlattr **attrs)
1550 struct net *net = sock_net(skb->sk);
1552 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
1553 struct xfrm_audit audit_info;
1556 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1557 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1558 audit_info.secid = NETLINK_CB(skb).sid;
1559 err = xfrm_state_flush(net, p->proto, &audit_info);
1561 if (err == -ESRCH) /* empty table */
1565 c.data.proto = p->proto;
1566 c.event = nlh->nlmsg_type;
1567 c.seq = nlh->nlmsg_seq;
1568 c.pid = nlh->nlmsg_pid;
1570 km_state_notify(NULL, &c);
1575 static inline size_t xfrm_aevent_msgsize(void)
1577 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1578 + nla_total_size(sizeof(struct xfrm_replay_state))
1579 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1580 + nla_total_size(sizeof(struct xfrm_mark))
1581 + nla_total_size(4) /* XFRM_AE_RTHR */
1582 + nla_total_size(4); /* XFRM_AE_ETHR */
1585 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1587 struct xfrm_aevent_id *id;
1588 struct nlmsghdr *nlh;
1590 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1594 id = nlmsg_data(nlh);
1595 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1596 id->sa_id.spi = x->id.spi;
1597 id->sa_id.family = x->props.family;
1598 id->sa_id.proto = x->id.proto;
1599 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1600 id->reqid = x->props.reqid;
1601 id->flags = c->data.aevent;
1603 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1604 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1606 if (id->flags & XFRM_AE_RTHR)
1607 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1609 if (id->flags & XFRM_AE_ETHR)
1610 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1611 x->replay_maxage * 10 / HZ);
1613 if (xfrm_mark_put(skb, &x->mark))
1614 goto nla_put_failure;
1616 return nlmsg_end(skb, nlh);
1619 nlmsg_cancel(skb, nlh);
1623 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1624 struct nlattr **attrs)
1626 struct net *net = sock_net(skb->sk);
1627 struct xfrm_state *x;
1628 struct sk_buff *r_skb;
1633 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1634 struct xfrm_usersa_id *id = &p->sa_id;
1636 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
1640 mark = xfrm_mark_get(attrs, &m);
1642 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
1649 * XXX: is this lock really needed - none of the other
1650 * gets lock (the concern is things getting updated
1651 * while we are still reading) - jhs
1653 spin_lock_bh(&x->lock);
1654 c.data.aevent = p->flags;
1655 c.seq = nlh->nlmsg_seq;
1656 c.pid = nlh->nlmsg_pid;
1658 if (build_aevent(r_skb, x, &c) < 0)
1660 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
1661 spin_unlock_bh(&x->lock);
1666 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1667 struct nlattr **attrs)
1669 struct net *net = sock_net(skb->sk);
1670 struct xfrm_state *x;
1675 struct xfrm_aevent_id *p = nlmsg_data(nlh);
1676 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1677 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
1682 /* pedantic mode - thou shalt sayeth replaceth */
1683 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1686 mark = xfrm_mark_get(attrs, &m);
1688 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1692 if (x->km.state != XFRM_STATE_VALID)
1695 spin_lock_bh(&x->lock);
1696 xfrm_update_ae_params(x, attrs);
1697 spin_unlock_bh(&x->lock);
1699 c.event = nlh->nlmsg_type;
1700 c.seq = nlh->nlmsg_seq;
1701 c.pid = nlh->nlmsg_pid;
1702 c.data.aevent = XFRM_AE_CU;
1703 km_state_notify(x, &c);
1710 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1711 struct nlattr **attrs)
1713 struct net *net = sock_net(skb->sk);
1715 u8 type = XFRM_POLICY_TYPE_MAIN;
1717 struct xfrm_audit audit_info;
1719 err = copy_from_user_policy_type(&type, attrs);
1723 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1724 audit_info.sessionid = NETLINK_CB(skb).sessionid;
1725 audit_info.secid = NETLINK_CB(skb).sid;
1726 err = xfrm_policy_flush(net, type, &audit_info);
1728 if (err == -ESRCH) /* empty table */
1734 c.event = nlh->nlmsg_type;
1735 c.seq = nlh->nlmsg_seq;
1736 c.pid = nlh->nlmsg_pid;
1738 km_policy_notify(NULL, 0, &c);
1742 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1743 struct nlattr **attrs)
1745 struct net *net = sock_net(skb->sk);
1746 struct xfrm_policy *xp;
1747 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
1748 struct xfrm_userpolicy_info *p = &up->pol;
1749 u8 type = XFRM_POLICY_TYPE_MAIN;
1752 u32 mark = xfrm_mark_get(attrs, &m);
1754 err = copy_from_user_policy_type(&type, attrs);
1758 err = verify_policy_dir(p->dir);
1763 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
1765 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
1766 struct xfrm_sec_ctx *ctx;
1768 err = verify_sec_ctx_len(attrs);
1774 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
1776 err = security_xfrm_policy_alloc(&ctx, uctx);
1780 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
1781 &p->sel, ctx, 0, &err);
1782 security_xfrm_policy_free(ctx);
1787 if (unlikely(xp->walk.dead))
1792 uid_t loginuid = NETLINK_CB(skb).loginuid;
1793 uid_t sessionid = NETLINK_CB(skb).sessionid;
1794 u32 sid = NETLINK_CB(skb).sid;
1795 xfrm_policy_delete(xp, p->dir);
1796 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
1799 // reset the timers here?
1800 WARN(1, "Dont know what to do with soft policy expire\n");
1802 km_policy_expired(xp, p->dir, up->hard, current->pid);
1809 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1810 struct nlattr **attrs)
1812 struct net *net = sock_net(skb->sk);
1813 struct xfrm_state *x;
1815 struct xfrm_user_expire *ue = nlmsg_data(nlh);
1816 struct xfrm_usersa_info *p = &ue->state;
1818 u32 mark = xfrm_mark_get(attrs, &m);
1820 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
1826 spin_lock_bh(&x->lock);
1828 if (x->km.state != XFRM_STATE_VALID)
1830 km_state_expired(x, ue->hard, current->pid);
1833 uid_t loginuid = NETLINK_CB(skb).loginuid;
1834 uid_t sessionid = NETLINK_CB(skb).sessionid;
1835 u32 sid = NETLINK_CB(skb).sid;
1836 __xfrm_state_delete(x);
1837 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
1841 spin_unlock_bh(&x->lock);
1846 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1847 struct nlattr **attrs)
1849 struct net *net = sock_net(skb->sk);
1850 struct xfrm_policy *xp;
1851 struct xfrm_user_tmpl *ut;
1853 struct nlattr *rt = attrs[XFRMA_TMPL];
1854 struct xfrm_mark mark;
1856 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
1857 struct xfrm_state *x = xfrm_state_alloc(net);
1863 xfrm_mark_get(attrs, &mark);
1865 err = verify_newpolicy_info(&ua->policy);
1870 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
1874 memcpy(&x->id, &ua->id, sizeof(ua->id));
1875 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1876 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1877 xp->mark.m = x->mark.m = mark.m;
1878 xp->mark.v = x->mark.v = mark.v;
1880 /* extract the templates and for each call km_key */
1881 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1882 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1883 memcpy(&x->id, &t->id, sizeof(x->id));
1884 x->props.mode = t->mode;
1885 x->props.reqid = t->reqid;
1886 x->props.family = ut->family;
1887 t->aalgos = ua->aalgos;
1888 t->ealgos = ua->ealgos;
1889 t->calgos = ua->calgos;
1890 err = km_query(x, t, xp);
1900 WARN(1, "BAD policy passed\n");
1907 #ifdef CONFIG_XFRM_MIGRATE
1908 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1909 struct xfrm_kmaddress *k,
1910 struct nlattr **attrs, int *num)
1912 struct nlattr *rt = attrs[XFRMA_MIGRATE];
1913 struct xfrm_user_migrate *um;
1917 struct xfrm_user_kmaddress *uk;
1919 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1920 memcpy(&k->local, &uk->local, sizeof(k->local));
1921 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1922 k->family = uk->family;
1923 k->reserved = uk->reserved;
1927 num_migrate = nla_len(rt) / sizeof(*um);
1929 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1932 for (i = 0; i < num_migrate; i++, um++, ma++) {
1933 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1934 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1935 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1936 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1938 ma->proto = um->proto;
1939 ma->mode = um->mode;
1940 ma->reqid = um->reqid;
1942 ma->old_family = um->old_family;
1943 ma->new_family = um->new_family;
1950 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1951 struct nlattr **attrs)
1953 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
1954 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1955 struct xfrm_kmaddress km, *kmp;
1960 if (attrs[XFRMA_MIGRATE] == NULL)
1963 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1965 err = copy_from_user_policy_type(&type, attrs);
1969 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
1976 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
1981 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1982 struct nlattr **attrs)
1984 return -ENOPROTOOPT;
1988 #ifdef CONFIG_XFRM_MIGRATE
1989 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1991 struct xfrm_user_migrate um;
1993 memset(&um, 0, sizeof(um));
1994 um.proto = m->proto;
1996 um.reqid = m->reqid;
1997 um.old_family = m->old_family;
1998 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1999 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2000 um.new_family = m->new_family;
2001 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2002 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2004 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
2007 static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
2009 struct xfrm_user_kmaddress uk;
2011 memset(&uk, 0, sizeof(uk));
2012 uk.family = k->family;
2013 uk.reserved = k->reserved;
2014 memcpy(&uk.local, &k->local, sizeof(uk.local));
2015 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
2017 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2020 static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
2022 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
2023 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2024 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2025 + userpolicy_type_attrsize();
2028 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
2029 int num_migrate, struct xfrm_kmaddress *k,
2030 struct xfrm_selector *sel, u8 dir, u8 type)
2032 struct xfrm_migrate *mp;
2033 struct xfrm_userpolicy_id *pol_id;
2034 struct nlmsghdr *nlh;
2037 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2041 pol_id = nlmsg_data(nlh);
2042 /* copy data from selector, dir, and type to the pol_id */
2043 memset(pol_id, 0, sizeof(*pol_id));
2044 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2047 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2050 if (copy_to_user_policy_type(type, skb) < 0)
2053 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2054 if (copy_to_user_migrate(mp, skb) < 0)
2058 return nlmsg_end(skb, nlh);
2060 nlmsg_cancel(skb, nlh);
2064 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
2065 struct xfrm_migrate *m, int num_migrate,
2066 struct xfrm_kmaddress *k)
2068 struct net *net = &init_net;
2069 struct sk_buff *skb;
2071 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
2076 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
2079 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
2082 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
2083 struct xfrm_migrate *m, int num_migrate,
2084 struct xfrm_kmaddress *k)
2086 return -ENOPROTOOPT;
2090 #define XMSGSIZE(type) sizeof(struct type)
2092 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
2093 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2094 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2095 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2096 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2097 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2098 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2099 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
2100 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
2101 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
2102 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2103 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
2104 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
2105 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
2106 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
2107 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2108 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2109 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
2110 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2111 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2112 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2117 static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
2118 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2119 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2120 [XFRMA_LASTUSED] = { .type = NLA_U64},
2121 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
2122 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
2123 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2124 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2125 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2126 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2127 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2128 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2129 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2130 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2131 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2132 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2133 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2134 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2135 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2136 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
2137 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
2138 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
2139 [XFRMA_TFCPAD] = { .type = NLA_U32 },
2142 static struct xfrm_link {
2143 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
2144 int (*dump)(struct sk_buff *, struct netlink_callback *);
2145 int (*done)(struct netlink_callback *);
2146 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2147 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2148 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2149 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
2150 .dump = xfrm_dump_sa,
2151 .done = xfrm_dump_sa_done },
2152 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2153 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2154 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
2155 .dump = xfrm_dump_policy,
2156 .done = xfrm_dump_policy_done },
2157 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
2158 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
2159 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
2160 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2161 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2162 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
2163 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2164 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
2165 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2166 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
2167 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
2168 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
2169 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2172 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
2174 struct net *net = sock_net(skb->sk);
2175 struct nlattr *attrs[XFRMA_MAX+1];
2176 struct xfrm_link *link;
2179 type = nlh->nlmsg_type;
2180 if (type > XFRM_MSG_MAX)
2183 type -= XFRM_MSG_BASE;
2184 link = &xfrm_dispatch[type];
2186 /* All operations require privileges, even GET */
2187 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2190 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2191 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2192 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2193 if (link->dump == NULL)
2196 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
2199 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
2204 if (link->doit == NULL)
2207 return link->doit(skb, nlh, attrs);
2210 static void xfrm_netlink_rcv(struct sk_buff *skb)
2212 mutex_lock(&xfrm_cfg_mutex);
2213 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2214 mutex_unlock(&xfrm_cfg_mutex);
2217 static inline size_t xfrm_expire_msgsize(void)
2219 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2220 + nla_total_size(sizeof(struct xfrm_mark));
2223 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2225 struct xfrm_user_expire *ue;
2226 struct nlmsghdr *nlh;
2228 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2232 ue = nlmsg_data(nlh);
2233 copy_to_user_state(x, &ue->state);
2234 ue->hard = (c->data.hard != 0) ? 1 : 0;
2236 if (xfrm_mark_put(skb, &x->mark))
2237 goto nla_put_failure;
2239 return nlmsg_end(skb, nlh);
2245 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2247 struct net *net = xs_net(x);
2248 struct sk_buff *skb;
2250 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
2254 if (build_expire(skb, x, c) < 0) {
2259 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2262 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2264 struct net *net = xs_net(x);
2265 struct sk_buff *skb;
2267 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
2271 if (build_aevent(skb, x, c) < 0)
2274 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2277 static int xfrm_notify_sa_flush(struct km_event *c)
2279 struct net *net = c->net;
2280 struct xfrm_usersa_flush *p;
2281 struct nlmsghdr *nlh;
2282 struct sk_buff *skb;
2283 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
2285 skb = nlmsg_new(len, GFP_ATOMIC);
2289 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2295 p = nlmsg_data(nlh);
2296 p->proto = c->data.proto;
2298 nlmsg_end(skb, nlh);
2300 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2303 static inline size_t xfrm_sa_len(struct xfrm_state *x)
2307 l += nla_total_size(aead_len(x->aead));
2309 l += nla_total_size(sizeof(struct xfrm_algo) +
2310 (x->aalg->alg_key_len + 7) / 8);
2311 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2314 l += nla_total_size(xfrm_alg_len(x->ealg));
2316 l += nla_total_size(sizeof(*x->calg));
2318 l += nla_total_size(sizeof(*x->encap));
2320 l += nla_total_size(sizeof(x->tfcpad));
2322 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2323 x->security->ctx_len);
2325 l += nla_total_size(sizeof(*x->coaddr));
2327 /* Must count x->lastused as it may become non-zero behind our back. */
2328 l += nla_total_size(sizeof(u64));
2333 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2335 struct net *net = xs_net(x);
2336 struct xfrm_usersa_info *p;
2337 struct xfrm_usersa_id *id;
2338 struct nlmsghdr *nlh;
2339 struct sk_buff *skb;
2340 int len = xfrm_sa_len(x);
2343 headlen = sizeof(*p);
2344 if (c->event == XFRM_MSG_DELSA) {
2345 len += nla_total_size(headlen);
2346 headlen = sizeof(*id);
2347 len += nla_total_size(sizeof(struct xfrm_mark));
2349 len += NLMSG_ALIGN(headlen);
2351 skb = nlmsg_new(len, GFP_ATOMIC);
2355 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2357 goto nla_put_failure;
2359 p = nlmsg_data(nlh);
2360 if (c->event == XFRM_MSG_DELSA) {
2361 struct nlattr *attr;
2363 id = nlmsg_data(nlh);
2364 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2365 id->spi = x->id.spi;
2366 id->family = x->props.family;
2367 id->proto = x->id.proto;
2369 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2371 goto nla_put_failure;
2376 if (copy_to_user_state_extra(x, p, skb))
2377 goto nla_put_failure;
2379 nlmsg_end(skb, nlh);
2381 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2384 /* Somebody screwed up with xfrm_sa_len! */
2390 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2394 case XFRM_MSG_EXPIRE:
2395 return xfrm_exp_state_notify(x, c);
2396 case XFRM_MSG_NEWAE:
2397 return xfrm_aevent_state_notify(x, c);
2398 case XFRM_MSG_DELSA:
2399 case XFRM_MSG_UPDSA:
2400 case XFRM_MSG_NEWSA:
2401 return xfrm_notify_sa(x, c);
2402 case XFRM_MSG_FLUSHSA:
2403 return xfrm_notify_sa_flush(c);
2405 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2414 static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2415 struct xfrm_policy *xp)
2417 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2418 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2419 + nla_total_size(sizeof(struct xfrm_mark))
2420 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2421 + userpolicy_type_attrsize();
2424 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2425 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2428 struct xfrm_user_acquire *ua;
2429 struct nlmsghdr *nlh;
2430 __u32 seq = xfrm_get_acqseq();
2432 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2436 ua = nlmsg_data(nlh);
2437 memcpy(&ua->id, &x->id, sizeof(ua->id));
2438 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2439 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2440 copy_to_user_policy(xp, &ua->policy, dir);
2441 ua->aalgos = xt->aalgos;
2442 ua->ealgos = xt->ealgos;
2443 ua->calgos = xt->calgos;
2444 ua->seq = x->km.seq = seq;
2446 if (copy_to_user_tmpl(xp, skb) < 0)
2448 if (copy_to_user_state_sec_ctx(x, skb))
2450 if (copy_to_user_policy_type(xp->type, skb) < 0)
2452 if (xfrm_mark_put(skb, &xp->mark))
2453 goto nla_put_failure;
2455 return nlmsg_end(skb, nlh);
2459 nlmsg_cancel(skb, nlh);
2463 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2464 struct xfrm_policy *xp, int dir)
2466 struct net *net = xs_net(x);
2467 struct sk_buff *skb;
2469 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
2473 if (build_acquire(skb, x, xt, xp, dir) < 0)
2476 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2479 /* User gives us xfrm_user_policy_info followed by an array of 0
2480 * or more templates.
2482 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2483 u8 *data, int len, int *dir)
2485 struct net *net = sock_net(sk);
2486 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2487 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2488 struct xfrm_policy *xp;
2491 switch (sk->sk_family) {
2493 if (opt != IP_XFRM_POLICY) {
2498 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2500 if (opt != IPV6_XFRM_POLICY) {
2513 if (len < sizeof(*p) ||
2514 verify_newpolicy_info(p))
2517 nr = ((len - sizeof(*p)) / sizeof(*ut));
2518 if (validate_tmpl(nr, ut, p->sel.family))
2521 if (p->dir > XFRM_POLICY_OUT)
2524 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
2530 copy_from_user_policy(xp, p);
2531 xp->type = XFRM_POLICY_TYPE_MAIN;
2532 copy_templates(xp, ut, nr);
2539 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2541 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2542 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2543 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2544 + nla_total_size(sizeof(struct xfrm_mark))
2545 + userpolicy_type_attrsize();
2548 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2549 int dir, struct km_event *c)
2551 struct xfrm_user_polexpire *upe;
2552 struct nlmsghdr *nlh;
2553 int hard = c->data.hard;
2555 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2559 upe = nlmsg_data(nlh);
2560 copy_to_user_policy(xp, &upe->pol, dir);
2561 if (copy_to_user_tmpl(xp, skb) < 0)
2563 if (copy_to_user_sec_ctx(xp, skb))
2565 if (copy_to_user_policy_type(xp->type, skb) < 0)
2567 if (xfrm_mark_put(skb, &xp->mark))
2568 goto nla_put_failure;
2571 return nlmsg_end(skb, nlh);
2575 nlmsg_cancel(skb, nlh);
2579 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2581 struct net *net = xp_net(xp);
2582 struct sk_buff *skb;
2584 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
2588 if (build_polexpire(skb, xp, dir, c) < 0)
2591 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2594 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2596 struct net *net = xp_net(xp);
2597 struct xfrm_userpolicy_info *p;
2598 struct xfrm_userpolicy_id *id;
2599 struct nlmsghdr *nlh;
2600 struct sk_buff *skb;
2601 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2604 headlen = sizeof(*p);
2605 if (c->event == XFRM_MSG_DELPOLICY) {
2606 len += nla_total_size(headlen);
2607 headlen = sizeof(*id);
2609 len += userpolicy_type_attrsize();
2610 len += nla_total_size(sizeof(struct xfrm_mark));
2611 len += NLMSG_ALIGN(headlen);
2613 skb = nlmsg_new(len, GFP_ATOMIC);
2617 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2621 p = nlmsg_data(nlh);
2622 if (c->event == XFRM_MSG_DELPOLICY) {
2623 struct nlattr *attr;
2625 id = nlmsg_data(nlh);
2626 memset(id, 0, sizeof(*id));
2629 id->index = xp->index;
2631 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2633 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2640 copy_to_user_policy(xp, p, dir);
2641 if (copy_to_user_tmpl(xp, skb) < 0)
2643 if (copy_to_user_policy_type(xp->type, skb) < 0)
2646 if (xfrm_mark_put(skb, &xp->mark))
2647 goto nla_put_failure;
2649 nlmsg_end(skb, nlh);
2651 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2659 static int xfrm_notify_policy_flush(struct km_event *c)
2661 struct net *net = c->net;
2662 struct nlmsghdr *nlh;
2663 struct sk_buff *skb;
2665 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
2669 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2672 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2675 nlmsg_end(skb, nlh);
2677 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2684 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2688 case XFRM_MSG_NEWPOLICY:
2689 case XFRM_MSG_UPDPOLICY:
2690 case XFRM_MSG_DELPOLICY:
2691 return xfrm_notify_policy(xp, dir, c);
2692 case XFRM_MSG_FLUSHPOLICY:
2693 return xfrm_notify_policy_flush(c);
2694 case XFRM_MSG_POLEXPIRE:
2695 return xfrm_exp_policy_notify(xp, dir, c);
2697 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2705 static inline size_t xfrm_report_msgsize(void)
2707 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2710 static int build_report(struct sk_buff *skb, u8 proto,
2711 struct xfrm_selector *sel, xfrm_address_t *addr)
2713 struct xfrm_user_report *ur;
2714 struct nlmsghdr *nlh;
2716 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2720 ur = nlmsg_data(nlh);
2722 memcpy(&ur->sel, sel, sizeof(ur->sel));
2725 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2727 return nlmsg_end(skb, nlh);
2730 nlmsg_cancel(skb, nlh);
2734 static int xfrm_send_report(struct net *net, u8 proto,
2735 struct xfrm_selector *sel, xfrm_address_t *addr)
2737 struct sk_buff *skb;
2739 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
2743 if (build_report(skb, proto, sel, addr) < 0)
2746 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2749 static inline size_t xfrm_mapping_msgsize(void)
2751 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2754 static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2755 xfrm_address_t *new_saddr, __be16 new_sport)
2757 struct xfrm_user_mapping *um;
2758 struct nlmsghdr *nlh;
2760 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2764 um = nlmsg_data(nlh);
2766 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2767 um->id.spi = x->id.spi;
2768 um->id.family = x->props.family;
2769 um->id.proto = x->id.proto;
2770 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2771 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2772 um->new_sport = new_sport;
2773 um->old_sport = x->encap->encap_sport;
2774 um->reqid = x->props.reqid;
2776 return nlmsg_end(skb, nlh);
2779 static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2782 struct net *net = xs_net(x);
2783 struct sk_buff *skb;
2785 if (x->id.proto != IPPROTO_ESP)
2791 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2795 if (build_mapping(skb, x, ipaddr, sport) < 0)
2798 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
2801 static struct xfrm_mgr netlink_mgr = {
2803 .notify = xfrm_send_state_notify,
2804 .acquire = xfrm_send_acquire,
2805 .compile_policy = xfrm_compile_policy,
2806 .notify_policy = xfrm_send_policy_notify,
2807 .report = xfrm_send_report,
2808 .migrate = xfrm_send_migrate,
2809 .new_mapping = xfrm_send_mapping,
2812 static int __net_init xfrm_user_net_init(struct net *net)
2816 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
2817 xfrm_netlink_rcv, NULL, THIS_MODULE);
2820 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
2821 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
2825 static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
2828 list_for_each_entry(net, net_exit_list, exit_list)
2829 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2831 list_for_each_entry(net, net_exit_list, exit_list)
2832 netlink_kernel_release(net->xfrm.nlsk_stash);
2835 static struct pernet_operations xfrm_user_net_ops = {
2836 .init = xfrm_user_net_init,
2837 .exit_batch = xfrm_user_net_exit,
2840 static int __init xfrm_user_init(void)
2844 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2846 rv = register_pernet_subsys(&xfrm_user_net_ops);
2849 rv = xfrm_register_km(&netlink_mgr);
2851 unregister_pernet_subsys(&xfrm_user_net_ops);
2855 static void __exit xfrm_user_exit(void)
2857 xfrm_unregister_km(&netlink_mgr);
2858 unregister_pernet_subsys(&xfrm_user_net_ops);
2861 module_init(xfrm_user_init);
2862 module_exit(xfrm_user_exit);
2863 MODULE_LICENSE("GPL");
2864 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);