1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
30 #include <asm/uaccess.h>
31 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32 #include <linux/in6.h>
35 static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
37 struct rtattr *rt = xfrma[type - 1];
38 struct xfrm_algo *algp;
44 len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp);
50 len -= (algp->alg_key_len + 7U) / 8;
56 if (!algp->alg_key_len &&
57 strcmp(algp->alg_name, "digest_null") != 0)
62 if (!algp->alg_key_len &&
63 strcmp(algp->alg_name, "cipher_null") != 0)
68 /* Zero length keys are legal. */
75 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
79 static int verify_encap_tmpl(struct rtattr **xfrma)
81 struct rtattr *rt = xfrma[XFRMA_ENCAP - 1];
82 struct xfrm_encap_tmpl *encap;
87 if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap))
93 static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
94 xfrm_address_t **addrp)
96 struct rtattr *rt = xfrma[type - 1];
101 if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
105 *addrp = RTA_DATA(rt);
110 static inline int verify_sec_ctx_len(struct rtattr **xfrma)
112 struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
113 struct xfrm_user_sec_ctx *uctx;
119 if (rt->rta_len < sizeof(*uctx))
124 len += sizeof(struct xfrm_user_sec_ctx);
125 len += uctx->ctx_len;
127 if (uctx->len != len)
134 static int verify_newsa_info(struct xfrm_usersa_info *p,
135 struct rtattr **xfrma)
145 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
157 switch (p->id.proto) {
159 if (!xfrma[XFRMA_ALG_AUTH-1] ||
160 xfrma[XFRMA_ALG_CRYPT-1] ||
161 xfrma[XFRMA_ALG_COMP-1])
166 if ((!xfrma[XFRMA_ALG_AUTH-1] &&
167 !xfrma[XFRMA_ALG_CRYPT-1]) ||
168 xfrma[XFRMA_ALG_COMP-1])
173 if (!xfrma[XFRMA_ALG_COMP-1] ||
174 xfrma[XFRMA_ALG_AUTH-1] ||
175 xfrma[XFRMA_ALG_CRYPT-1])
179 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
180 case IPPROTO_DSTOPTS:
181 case IPPROTO_ROUTING:
182 if (xfrma[XFRMA_ALG_COMP-1] ||
183 xfrma[XFRMA_ALG_AUTH-1] ||
184 xfrma[XFRMA_ALG_CRYPT-1] ||
185 xfrma[XFRMA_ENCAP-1] ||
186 xfrma[XFRMA_SEC_CTX-1] ||
187 !xfrma[XFRMA_COADDR-1])
196 if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH)))
198 if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT)))
200 if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP)))
202 if ((err = verify_encap_tmpl(xfrma)))
204 if ((err = verify_sec_ctx_len(xfrma)))
206 if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
211 case XFRM_MODE_TRANSPORT:
212 case XFRM_MODE_TUNNEL:
213 case XFRM_MODE_ROUTEOPTIMIZATION:
226 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
227 struct xfrm_algo_desc *(*get_byname)(char *, int),
228 struct rtattr *u_arg)
230 struct rtattr *rta = u_arg;
231 struct xfrm_algo *p, *ualg;
232 struct xfrm_algo_desc *algo;
238 ualg = RTA_DATA(rta);
240 algo = get_byname(ualg->alg_name, 1);
243 *props = algo->desc.sadb_alg_id;
245 len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
246 p = kmalloc(len, GFP_KERNEL);
250 memcpy(p, ualg, len);
251 strcpy(p->alg_name, algo->name);
256 static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
258 struct rtattr *rta = u_arg;
259 struct xfrm_encap_tmpl *p, *uencap;
264 uencap = RTA_DATA(rta);
265 p = kmalloc(sizeof(*p), GFP_KERNEL);
269 memcpy(p, uencap, sizeof(*p));
275 static inline int xfrm_user_sec_ctx_size(struct xfrm_policy *xp)
277 struct xfrm_sec_ctx *xfrm_ctx = xp->security;
281 len += sizeof(struct xfrm_user_sec_ctx);
282 len += xfrm_ctx->ctx_len;
287 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
289 struct xfrm_user_sec_ctx *uctx;
294 uctx = RTA_DATA(u_arg);
295 return security_xfrm_state_alloc(x, uctx);
298 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
300 struct rtattr *rta = u_arg;
301 xfrm_address_t *p, *uaddrp;
306 uaddrp = RTA_DATA(rta);
307 p = kmalloc(sizeof(*p), GFP_KERNEL);
311 memcpy(p, uaddrp, sizeof(*p));
316 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
318 memcpy(&x->id, &p->id, sizeof(x->id));
319 memcpy(&x->sel, &p->sel, sizeof(x->sel));
320 memcpy(&x->lft, &p->lft, sizeof(x->lft));
321 x->props.mode = p->mode;
322 x->props.replay_window = p->replay_window;
323 x->props.reqid = p->reqid;
324 x->props.family = p->family;
325 x->props.saddr = p->saddr;
326 x->props.flags = p->flags;
330 * someday when pfkey also has support, we could have the code
331 * somehow made shareable and move it to xfrm_state.c - JHS
334 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
337 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
338 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
339 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
340 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
343 struct xfrm_replay_state *replay;
344 if (RTA_PAYLOAD(rp) < sizeof(*replay))
346 replay = RTA_DATA(rp);
347 memcpy(&x->replay, replay, sizeof(*replay));
348 memcpy(&x->preplay, replay, sizeof(*replay));
352 struct xfrm_lifetime_cur *ltime;
353 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
355 ltime = RTA_DATA(lt);
356 x->curlft.bytes = ltime->bytes;
357 x->curlft.packets = ltime->packets;
358 x->curlft.add_time = ltime->add_time;
359 x->curlft.use_time = ltime->use_time;
363 if (RTA_PAYLOAD(et) < sizeof(u32))
365 x->replay_maxage = *(u32*)RTA_DATA(et);
369 if (RTA_PAYLOAD(rt) < sizeof(u32))
371 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
379 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
380 struct rtattr **xfrma,
383 struct xfrm_state *x = xfrm_state_alloc();
389 copy_from_user_state(x, p);
391 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
392 xfrm_aalg_get_byname,
393 xfrma[XFRMA_ALG_AUTH-1])))
395 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
396 xfrm_ealg_get_byname,
397 xfrma[XFRMA_ALG_CRYPT-1])))
399 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
400 xfrm_calg_get_byname,
401 xfrma[XFRMA_ALG_COMP-1])))
403 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
405 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
407 err = xfrm_init_state(x);
411 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
415 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
416 /* sysctl_xfrm_aevent_etime is in 100ms units */
417 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
418 x->preplay.bitmap = 0;
419 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
420 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
422 /* override default values from above */
424 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
431 x->km.state = XFRM_STATE_DEAD;
438 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
440 struct xfrm_usersa_info *p = NLMSG_DATA(nlh);
441 struct xfrm_state *x;
445 err = verify_newsa_info(p, (struct rtattr **)xfrma);
449 x = xfrm_state_construct(p, (struct rtattr **)xfrma, &err);
454 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
455 err = xfrm_state_add(x);
457 err = xfrm_state_update(x);
460 x->km.state = XFRM_STATE_DEAD;
465 c.seq = nlh->nlmsg_seq;
466 c.pid = nlh->nlmsg_pid;
467 c.event = nlh->nlmsg_type;
469 km_state_notify(x, &c);
475 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
476 struct rtattr **xfrma,
479 struct xfrm_state *x = NULL;
482 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
484 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
486 xfrm_address_t *saddr = NULL;
488 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
497 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
507 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
509 struct xfrm_state *x;
512 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
514 x = xfrm_user_state_lookup(p, (struct rtattr **)xfrma, &err);
518 if ((err = security_xfrm_state_delete(x)) != 0)
521 if (xfrm_state_kern(x)) {
526 err = xfrm_state_delete(x);
530 c.seq = nlh->nlmsg_seq;
531 c.pid = nlh->nlmsg_pid;
532 c.event = nlh->nlmsg_type;
533 km_state_notify(x, &c);
540 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
542 memcpy(&p->id, &x->id, sizeof(p->id));
543 memcpy(&p->sel, &x->sel, sizeof(p->sel));
544 memcpy(&p->lft, &x->lft, sizeof(p->lft));
545 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
546 memcpy(&p->stats, &x->stats, sizeof(p->stats));
547 p->saddr = x->props.saddr;
548 p->mode = x->props.mode;
549 p->replay_window = x->props.replay_window;
550 p->reqid = x->props.reqid;
551 p->family = x->props.family;
552 p->flags = x->props.flags;
556 struct xfrm_dump_info {
557 struct sk_buff *in_skb;
558 struct sk_buff *out_skb;
565 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
567 struct xfrm_dump_info *sp = ptr;
568 struct sk_buff *in_skb = sp->in_skb;
569 struct sk_buff *skb = sp->out_skb;
570 struct xfrm_usersa_info *p;
571 struct nlmsghdr *nlh;
572 unsigned char *b = skb->tail;
574 if (sp->this_idx < sp->start_idx)
577 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
579 XFRM_MSG_NEWSA, sizeof(*p));
580 nlh->nlmsg_flags = sp->nlmsg_flags;
583 copy_to_user_state(x, p);
586 RTA_PUT(skb, XFRMA_ALG_AUTH,
587 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
589 RTA_PUT(skb, XFRMA_ALG_CRYPT,
590 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
592 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
595 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
598 int ctx_size = sizeof(struct xfrm_sec_ctx) +
599 x->security->ctx_len;
600 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
601 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
603 uctx->exttype = XFRMA_SEC_CTX;
604 uctx->len = ctx_size;
605 uctx->ctx_doi = x->security->ctx_doi;
606 uctx->ctx_alg = x->security->ctx_alg;
607 uctx->ctx_len = x->security->ctx_len;
608 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
612 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
615 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
617 nlh->nlmsg_len = skb->tail - b;
624 skb_trim(skb, b - skb->data);
628 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
630 struct xfrm_dump_info info;
632 info.in_skb = cb->skb;
634 info.nlmsg_seq = cb->nlh->nlmsg_seq;
635 info.nlmsg_flags = NLM_F_MULTI;
637 info.start_idx = cb->args[0];
638 (void) xfrm_state_walk(0, dump_one_state, &info);
639 cb->args[0] = info.this_idx;
644 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
645 struct xfrm_state *x, u32 seq)
647 struct xfrm_dump_info info;
650 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
652 return ERR_PTR(-ENOMEM);
654 NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
655 info.in_skb = in_skb;
657 info.nlmsg_seq = seq;
658 info.nlmsg_flags = 0;
659 info.this_idx = info.start_idx = 0;
661 if (dump_one_state(x, 0, &info)) {
669 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
671 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
672 struct xfrm_state *x;
673 struct sk_buff *resp_skb;
676 x = xfrm_user_state_lookup(p, (struct rtattr **)xfrma, &err);
680 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
681 if (IS_ERR(resp_skb)) {
682 err = PTR_ERR(resp_skb);
684 err = netlink_unicast(xfrm_nl, resp_skb,
685 NETLINK_CB(skb).pid, MSG_DONTWAIT);
692 static int verify_userspi_info(struct xfrm_userspi_info *p)
694 switch (p->info.id.proto) {
700 /* IPCOMP spi is 16-bits. */
701 if (p->max >= 0x10000)
715 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
717 struct xfrm_state *x;
718 struct xfrm_userspi_info *p;
719 struct sk_buff *resp_skb;
720 xfrm_address_t *daddr;
725 err = verify_userspi_info(p);
729 family = p->info.family;
730 daddr = &p->info.id.daddr;
734 x = xfrm_find_acq_byseq(p->info.seq);
735 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
742 x = xfrm_find_acq(p->info.mode, p->info.reqid,
743 p->info.id.proto, daddr,
750 resp_skb = ERR_PTR(-ENOENT);
752 spin_lock_bh(&x->lock);
753 if (x->km.state != XFRM_STATE_DEAD) {
754 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
756 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
758 spin_unlock_bh(&x->lock);
760 if (IS_ERR(resp_skb)) {
761 err = PTR_ERR(resp_skb);
765 err = netlink_unicast(xfrm_nl, resp_skb,
766 NETLINK_CB(skb).pid, MSG_DONTWAIT);
774 static int verify_policy_dir(__u8 dir)
778 case XFRM_POLICY_OUT:
779 case XFRM_POLICY_FWD:
789 static int verify_policy_type(__u8 type)
792 case XFRM_POLICY_TYPE_MAIN:
793 #ifdef CONFIG_XFRM_SUB_POLICY
794 case XFRM_POLICY_TYPE_SUB:
805 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
809 case XFRM_SHARE_SESSION:
810 case XFRM_SHARE_USER:
811 case XFRM_SHARE_UNIQUE:
819 case XFRM_POLICY_ALLOW:
820 case XFRM_POLICY_BLOCK:
827 switch (p->sel.family) {
832 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
835 return -EAFNOSUPPORT;
842 return verify_policy_dir(p->dir);
845 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
847 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
848 struct xfrm_user_sec_ctx *uctx;
854 return security_xfrm_policy_alloc(pol, uctx);
857 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
863 for (i = 0; i < nr; i++, ut++) {
864 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
866 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
867 memcpy(&t->saddr, &ut->saddr,
868 sizeof(xfrm_address_t));
869 t->reqid = ut->reqid;
871 t->share = ut->share;
872 t->optional = ut->optional;
873 t->aalgos = ut->aalgos;
874 t->ealgos = ut->ealgos;
875 t->calgos = ut->calgos;
879 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
881 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
882 struct xfrm_user_tmpl *utmpl;
888 nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
890 if (nr > XFRM_MAX_DEPTH)
893 copy_templates(pol, RTA_DATA(rt), nr);
898 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
900 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
901 struct xfrm_userpolicy_type *upt;
902 __u8 type = XFRM_POLICY_TYPE_MAIN;
906 if (rt->rta_len < sizeof(*upt))
913 err = verify_policy_type(type);
921 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
923 xp->priority = p->priority;
924 xp->index = p->index;
925 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
926 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
927 xp->action = p->action;
928 xp->flags = p->flags;
929 xp->family = p->sel.family;
930 /* XXX xp->share = p->share; */
933 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
935 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
936 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
937 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
938 p->priority = xp->priority;
939 p->index = xp->index;
940 p->sel.family = xp->family;
942 p->action = xp->action;
943 p->flags = xp->flags;
944 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
947 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
949 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
957 copy_from_user_policy(xp, p);
959 err = copy_from_user_policy_type(&xp->type, xfrma);
963 if (!(err = copy_from_user_tmpl(xp, xfrma)))
964 err = copy_from_user_sec_ctx(xp, xfrma);
975 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
977 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
978 struct xfrm_policy *xp;
983 err = verify_newpolicy_info(p);
986 err = verify_sec_ctx_len((struct rtattr **)xfrma);
990 xp = xfrm_policy_construct(p, (struct rtattr **)xfrma, &err);
994 /* shouldnt excl be based on nlh flags??
995 * Aha! this is anti-netlink really i.e more pfkey derived
996 * in netlink excl is a flag and you wouldnt need
997 * a type XFRM_MSG_UPDPOLICY - JHS */
998 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
999 err = xfrm_policy_insert(p->dir, xp, excl);
1001 security_xfrm_policy_free(xp);
1006 c.event = nlh->nlmsg_type;
1007 c.seq = nlh->nlmsg_seq;
1008 c.pid = nlh->nlmsg_pid;
1009 km_policy_notify(xp, p->dir, &c);
1016 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1018 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1021 if (xp->xfrm_nr == 0)
1024 for (i = 0; i < xp->xfrm_nr; i++) {
1025 struct xfrm_user_tmpl *up = &vec[i];
1026 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1028 memcpy(&up->id, &kp->id, sizeof(up->id));
1029 up->family = xp->family;
1030 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1031 up->reqid = kp->reqid;
1032 up->mode = kp->mode;
1033 up->share = kp->share;
1034 up->optional = kp->optional;
1035 up->aalgos = kp->aalgos;
1036 up->ealgos = kp->ealgos;
1037 up->calgos = kp->calgos;
1039 RTA_PUT(skb, XFRMA_TMPL,
1040 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1049 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1051 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1052 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1053 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1055 uctx->exttype = XFRMA_SEC_CTX;
1056 uctx->len = ctx_size;
1057 uctx->ctx_doi = s->ctx_doi;
1058 uctx->ctx_alg = s->ctx_alg;
1059 uctx->ctx_len = s->ctx_len;
1060 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1067 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1070 return copy_sec_ctx(x->security, skb);
1075 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1078 return copy_sec_ctx(xp->security, skb);
1083 #ifdef CONFIG_XFRM_SUB_POLICY
1084 static int copy_to_user_policy_type(struct xfrm_policy *xp, struct sk_buff *skb)
1086 struct xfrm_userpolicy_type upt;
1088 memset(&upt, 0, sizeof(upt));
1089 upt.type = xp->type;
1091 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1100 static inline int copy_to_user_policy_type(struct xfrm_policy *xp, struct sk_buff *skb)
1106 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1108 struct xfrm_dump_info *sp = ptr;
1109 struct xfrm_userpolicy_info *p;
1110 struct sk_buff *in_skb = sp->in_skb;
1111 struct sk_buff *skb = sp->out_skb;
1112 struct nlmsghdr *nlh;
1113 unsigned char *b = skb->tail;
1115 if (sp->this_idx < sp->start_idx)
1118 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1120 XFRM_MSG_NEWPOLICY, sizeof(*p));
1121 p = NLMSG_DATA(nlh);
1122 nlh->nlmsg_flags = sp->nlmsg_flags;
1124 copy_to_user_policy(xp, p, dir);
1125 if (copy_to_user_tmpl(xp, skb) < 0)
1127 if (copy_to_user_sec_ctx(xp, skb))
1129 if (copy_to_user_policy_type(xp, skb) < 0)
1132 nlh->nlmsg_len = skb->tail - b;
1138 skb_trim(skb, b - skb->data);
1142 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1144 struct xfrm_dump_info info;
1146 info.in_skb = cb->skb;
1148 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1149 info.nlmsg_flags = NLM_F_MULTI;
1151 info.start_idx = cb->args[0];
1152 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1153 #ifdef CONFIG_XFRM_SUB_POLICY
1154 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1156 cb->args[0] = info.this_idx;
1161 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1162 struct xfrm_policy *xp,
1165 struct xfrm_dump_info info;
1166 struct sk_buff *skb;
1168 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1170 return ERR_PTR(-ENOMEM);
1172 NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
1173 info.in_skb = in_skb;
1175 info.nlmsg_seq = seq;
1176 info.nlmsg_flags = 0;
1177 info.this_idx = info.start_idx = 0;
1179 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1187 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1189 struct xfrm_policy *xp;
1190 struct xfrm_userpolicy_id *p;
1191 __u8 type = XFRM_POLICY_TYPE_MAIN;
1196 p = NLMSG_DATA(nlh);
1197 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1199 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1203 err = verify_policy_dir(p->dir);
1208 xp = xfrm_policy_byid(type, p->dir, p->index, delete);
1210 struct rtattr **rtattrs = (struct rtattr **)xfrma;
1211 struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1];
1212 struct xfrm_policy tmp;
1214 err = verify_sec_ctx_len(rtattrs);
1218 memset(&tmp, 0, sizeof(struct xfrm_policy));
1220 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1222 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1225 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, delete);
1226 security_xfrm_policy_free(&tmp);
1232 struct sk_buff *resp_skb;
1234 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1235 if (IS_ERR(resp_skb)) {
1236 err = PTR_ERR(resp_skb);
1238 err = netlink_unicast(xfrm_nl, resp_skb,
1239 NETLINK_CB(skb).pid,
1243 if ((err = security_xfrm_policy_delete(xp)) != 0)
1245 c.data.byid = p->index;
1246 c.event = nlh->nlmsg_type;
1247 c.seq = nlh->nlmsg_seq;
1248 c.pid = nlh->nlmsg_pid;
1249 km_policy_notify(xp, p->dir, &c);
1258 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1261 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1263 xfrm_state_flush(p->proto);
1264 c.data.proto = p->proto;
1265 c.event = nlh->nlmsg_type;
1266 c.seq = nlh->nlmsg_seq;
1267 c.pid = nlh->nlmsg_pid;
1268 km_state_notify(NULL, &c);
1274 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1276 struct xfrm_aevent_id *id;
1277 struct nlmsghdr *nlh;
1278 struct xfrm_lifetime_cur ltime;
1279 unsigned char *b = skb->tail;
1281 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1282 id = NLMSG_DATA(nlh);
1283 nlh->nlmsg_flags = 0;
1285 id->sa_id.daddr = x->id.daddr;
1286 id->sa_id.spi = x->id.spi;
1287 id->sa_id.family = x->props.family;
1288 id->sa_id.proto = x->id.proto;
1289 id->flags = c->data.aevent;
1291 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1293 ltime.bytes = x->curlft.bytes;
1294 ltime.packets = x->curlft.packets;
1295 ltime.add_time = x->curlft.add_time;
1296 ltime.use_time = x->curlft.use_time;
1298 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1300 if (id->flags&XFRM_AE_RTHR) {
1301 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1304 if (id->flags&XFRM_AE_ETHR) {
1305 u32 etimer = x->replay_maxage*10/HZ;
1306 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1309 nlh->nlmsg_len = skb->tail - b;
1314 skb_trim(skb, b - skb->data);
1318 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1320 struct xfrm_state *x;
1321 struct sk_buff *r_skb;
1324 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1325 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1326 struct xfrm_usersa_id *id = &p->sa_id;
1328 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1329 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1331 if (p->flags&XFRM_AE_RTHR)
1332 len+=RTA_SPACE(sizeof(u32));
1334 if (p->flags&XFRM_AE_ETHR)
1335 len+=RTA_SPACE(sizeof(u32));
1337 r_skb = alloc_skb(len, GFP_ATOMIC);
1341 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1348 * XXX: is this lock really needed - none of the other
1349 * gets lock (the concern is things getting updated
1350 * while we are still reading) - jhs
1352 spin_lock_bh(&x->lock);
1353 c.data.aevent = p->flags;
1354 c.seq = nlh->nlmsg_seq;
1355 c.pid = nlh->nlmsg_pid;
1357 if (build_aevent(r_skb, x, &c) < 0)
1359 err = netlink_unicast(xfrm_nl, r_skb,
1360 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1361 spin_unlock_bh(&x->lock);
1366 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1368 struct xfrm_state *x;
1371 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1372 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1373 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1378 /* pedantic mode - thou shalt sayeth replaceth */
1379 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1382 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1386 if (x->km.state != XFRM_STATE_VALID)
1389 spin_lock_bh(&x->lock);
1390 err = xfrm_update_ae_params(x,(struct rtattr **)xfrma);
1391 spin_unlock_bh(&x->lock);
1395 c.event = nlh->nlmsg_type;
1396 c.seq = nlh->nlmsg_seq;
1397 c.pid = nlh->nlmsg_pid;
1398 c.data.aevent = XFRM_AE_CU;
1399 km_state_notify(x, &c);
1406 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1409 __u8 type = XFRM_POLICY_TYPE_MAIN;
1412 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1416 xfrm_policy_flush(type);
1418 c.event = nlh->nlmsg_type;
1419 c.seq = nlh->nlmsg_seq;
1420 c.pid = nlh->nlmsg_pid;
1421 km_policy_notify(NULL, 0, &c);
1425 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1427 struct xfrm_policy *xp;
1428 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1429 struct xfrm_userpolicy_info *p = &up->pol;
1430 __u8 type = XFRM_POLICY_TYPE_MAIN;
1433 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1438 xp = xfrm_policy_byid(type, p->dir, p->index, 0);
1440 struct rtattr **rtattrs = (struct rtattr **)xfrma;
1441 struct rtattr *rt = rtattrs[XFRMA_SEC_CTX-1];
1442 struct xfrm_policy tmp;
1444 err = verify_sec_ctx_len(rtattrs);
1448 memset(&tmp, 0, sizeof(struct xfrm_policy));
1450 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1452 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1455 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, 0);
1456 security_xfrm_policy_free(&tmp);
1461 read_lock(&xp->lock);
1463 read_unlock(&xp->lock);
1467 read_unlock(&xp->lock);
1470 xfrm_policy_delete(xp, p->dir);
1472 // reset the timers here?
1473 printk("Dont know what to do with soft policy expire\n");
1475 km_policy_expired(xp, p->dir, up->hard, current->pid);
1482 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1484 struct xfrm_state *x;
1486 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1487 struct xfrm_usersa_info *p = &ue->state;
1489 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1497 spin_lock_bh(&x->lock);
1498 if (x->km.state != XFRM_STATE_VALID)
1500 km_state_expired(x, ue->hard, current->pid);
1503 __xfrm_state_delete(x);
1505 spin_unlock_bh(&x->lock);
1510 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
1512 struct xfrm_policy *xp;
1513 struct xfrm_user_tmpl *ut;
1515 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1517 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1518 struct xfrm_state *x = xfrm_state_alloc();
1524 err = verify_newpolicy_info(&ua->policy);
1526 printk("BAD policy passed\n");
1532 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); if (!xp) {
1537 memcpy(&x->id, &ua->id, sizeof(ua->id));
1538 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1539 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1542 /* extract the templates and for each call km_key */
1543 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1544 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1545 memcpy(&x->id, &t->id, sizeof(x->id));
1546 x->props.mode = t->mode;
1547 x->props.reqid = t->reqid;
1548 x->props.family = ut->family;
1549 t->aalgos = ua->aalgos;
1550 t->ealgos = ua->ealgos;
1551 t->calgos = ua->calgos;
1552 err = km_query(x, t, xp);
1563 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1565 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1566 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1567 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1568 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1569 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1570 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1571 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1572 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1573 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1574 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1575 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1576 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1577 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1578 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1579 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1580 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1581 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1582 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1587 static struct xfrm_link {
1588 int (*doit)(struct sk_buff *, struct nlmsghdr *, void **);
1589 int (*dump)(struct sk_buff *, struct netlink_callback *);
1590 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1591 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1592 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1593 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1594 .dump = xfrm_dump_sa },
1595 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1596 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1597 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1598 .dump = xfrm_dump_policy },
1599 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1600 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1601 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1602 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1603 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1604 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1605 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1606 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1607 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1608 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1611 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
1613 struct rtattr *xfrma[XFRMA_MAX];
1614 struct xfrm_link *link;
1617 if (!(nlh->nlmsg_flags & NLM_F_REQUEST))
1620 type = nlh->nlmsg_type;
1622 /* A control message: ignore them */
1623 if (type < XFRM_MSG_BASE)
1626 /* Unknown message: reply with EINVAL */
1627 if (type > XFRM_MSG_MAX)
1630 type -= XFRM_MSG_BASE;
1631 link = &xfrm_dispatch[type];
1633 /* All operations require privileges, even GET */
1634 if (security_netlink_recv(skb, CAP_NET_ADMIN)) {
1639 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1640 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1641 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1642 if (link->dump == NULL)
1645 if ((*errp = netlink_dump_start(xfrm_nl, skb, nlh,
1646 link->dump, NULL)) != 0) {
1650 netlink_queue_skip(nlh, skb);
1654 memset(xfrma, 0, sizeof(xfrma));
1656 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1659 if (nlh->nlmsg_len > min_len) {
1660 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
1661 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
1663 while (RTA_OK(attr, attrlen)) {
1664 unsigned short flavor = attr->rta_type;
1666 if (flavor > XFRMA_MAX)
1668 xfrma[flavor - 1] = attr;
1670 attr = RTA_NEXT(attr, attrlen);
1674 if (link->doit == NULL)
1676 *errp = link->doit(skb, nlh, (void **) &xfrma);
1685 static void xfrm_netlink_rcv(struct sock *sk, int len)
1687 unsigned int qlen = 0;
1690 mutex_lock(&xfrm_cfg_mutex);
1691 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
1692 mutex_unlock(&xfrm_cfg_mutex);
1697 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1699 struct xfrm_user_expire *ue;
1700 struct nlmsghdr *nlh;
1701 unsigned char *b = skb->tail;
1703 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
1705 ue = NLMSG_DATA(nlh);
1706 nlh->nlmsg_flags = 0;
1708 copy_to_user_state(x, &ue->state);
1709 ue->hard = (c->data.hard != 0) ? 1 : 0;
1711 nlh->nlmsg_len = skb->tail - b;
1715 skb_trim(skb, b - skb->data);
1719 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1721 struct sk_buff *skb;
1722 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
1724 skb = alloc_skb(len, GFP_ATOMIC);
1728 if (build_expire(skb, x, c) < 0)
1731 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
1732 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1735 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1737 struct sk_buff *skb;
1738 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1740 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1741 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1742 skb = alloc_skb(len, GFP_ATOMIC);
1746 if (build_aevent(skb, x, c) < 0)
1749 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
1750 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
1753 static int xfrm_notify_sa_flush(struct km_event *c)
1755 struct xfrm_usersa_flush *p;
1756 struct nlmsghdr *nlh;
1757 struct sk_buff *skb;
1759 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
1761 skb = alloc_skb(len, GFP_ATOMIC);
1766 nlh = NLMSG_PUT(skb, c->pid, c->seq,
1767 XFRM_MSG_FLUSHSA, sizeof(*p));
1768 nlh->nlmsg_flags = 0;
1770 p = NLMSG_DATA(nlh);
1771 p->proto = c->data.proto;
1773 nlh->nlmsg_len = skb->tail - b;
1775 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
1776 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1783 static int inline xfrm_sa_len(struct xfrm_state *x)
1787 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
1789 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
1791 l += RTA_SPACE(sizeof(*x->calg));
1793 l += RTA_SPACE(sizeof(*x->encap));
1798 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
1800 struct xfrm_usersa_info *p;
1801 struct xfrm_usersa_id *id;
1802 struct nlmsghdr *nlh;
1803 struct sk_buff *skb;
1805 int len = xfrm_sa_len(x);
1808 headlen = sizeof(*p);
1809 if (c->event == XFRM_MSG_DELSA) {
1810 len += RTA_SPACE(headlen);
1811 headlen = sizeof(*id);
1813 len += NLMSG_SPACE(headlen);
1815 skb = alloc_skb(len, GFP_ATOMIC);
1820 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
1821 nlh->nlmsg_flags = 0;
1823 p = NLMSG_DATA(nlh);
1824 if (c->event == XFRM_MSG_DELSA) {
1825 id = NLMSG_DATA(nlh);
1826 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
1827 id->spi = x->id.spi;
1828 id->family = x->props.family;
1829 id->proto = x->id.proto;
1831 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
1834 copy_to_user_state(x, p);
1837 RTA_PUT(skb, XFRMA_ALG_AUTH,
1838 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
1840 RTA_PUT(skb, XFRMA_ALG_CRYPT,
1841 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
1843 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1846 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1848 nlh->nlmsg_len = skb->tail - b;
1850 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
1851 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
1859 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
1863 case XFRM_MSG_EXPIRE:
1864 return xfrm_exp_state_notify(x, c);
1865 case XFRM_MSG_NEWAE:
1866 return xfrm_aevent_state_notify(x, c);
1867 case XFRM_MSG_DELSA:
1868 case XFRM_MSG_UPDSA:
1869 case XFRM_MSG_NEWSA:
1870 return xfrm_notify_sa(x, c);
1871 case XFRM_MSG_FLUSHSA:
1872 return xfrm_notify_sa_flush(c);
1874 printk("xfrm_user: Unknown SA event %d\n", c->event);
1882 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
1883 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
1886 struct xfrm_user_acquire *ua;
1887 struct nlmsghdr *nlh;
1888 unsigned char *b = skb->tail;
1889 __u32 seq = xfrm_get_acqseq();
1891 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
1893 ua = NLMSG_DATA(nlh);
1894 nlh->nlmsg_flags = 0;
1896 memcpy(&ua->id, &x->id, sizeof(ua->id));
1897 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
1898 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
1899 copy_to_user_policy(xp, &ua->policy, dir);
1900 ua->aalgos = xt->aalgos;
1901 ua->ealgos = xt->ealgos;
1902 ua->calgos = xt->calgos;
1903 ua->seq = x->km.seq = seq;
1905 if (copy_to_user_tmpl(xp, skb) < 0)
1907 if (copy_to_user_state_sec_ctx(x, skb))
1909 if (copy_to_user_policy_type(xp, skb) < 0)
1912 nlh->nlmsg_len = skb->tail - b;
1916 skb_trim(skb, b - skb->data);
1920 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
1921 struct xfrm_policy *xp, int dir)
1923 struct sk_buff *skb;
1926 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
1927 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
1928 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
1929 skb = alloc_skb(len, GFP_ATOMIC);
1933 if (build_acquire(skb, x, xt, xp, dir) < 0)
1936 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
1937 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1940 /* User gives us xfrm_user_policy_info followed by an array of 0
1941 * or more templates.
1943 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1944 u8 *data, int len, int *dir)
1946 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
1947 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
1948 struct xfrm_policy *xp;
1951 switch (sk->sk_family) {
1953 if (opt != IP_XFRM_POLICY) {
1958 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1960 if (opt != IPV6_XFRM_POLICY) {
1973 if (len < sizeof(*p) ||
1974 verify_newpolicy_info(p))
1977 nr = ((len - sizeof(*p)) / sizeof(*ut));
1978 if (nr > XFRM_MAX_DEPTH)
1981 if (p->dir > XFRM_POLICY_OUT)
1984 xp = xfrm_policy_alloc(GFP_KERNEL);
1990 copy_from_user_policy(xp, p);
1991 xp->type = XFRM_POLICY_TYPE_MAIN;
1992 copy_templates(xp, ut, nr);
1994 if (!xp->security) {
1995 int err = security_xfrm_sock_policy_alloc(xp, sk);
2008 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2009 int dir, struct km_event *c)
2011 struct xfrm_user_polexpire *upe;
2012 struct nlmsghdr *nlh;
2013 int hard = c->data.hard;
2014 unsigned char *b = skb->tail;
2016 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2017 upe = NLMSG_DATA(nlh);
2018 nlh->nlmsg_flags = 0;
2020 copy_to_user_policy(xp, &upe->pol, dir);
2021 if (copy_to_user_tmpl(xp, skb) < 0)
2023 if (copy_to_user_sec_ctx(xp, skb))
2025 if (copy_to_user_policy_type(xp, skb) < 0)
2029 nlh->nlmsg_len = skb->tail - b;
2033 skb_trim(skb, b - skb->data);
2037 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2039 struct sk_buff *skb;
2042 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2043 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2044 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp));
2045 skb = alloc_skb(len, GFP_ATOMIC);
2049 if (build_polexpire(skb, xp, dir, c) < 0)
2052 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2053 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2056 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2058 struct xfrm_userpolicy_info *p;
2059 struct xfrm_userpolicy_id *id;
2060 struct nlmsghdr *nlh;
2061 struct sk_buff *skb;
2063 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2066 headlen = sizeof(*p);
2067 if (c->event == XFRM_MSG_DELPOLICY) {
2068 len += RTA_SPACE(headlen);
2069 headlen = sizeof(*id);
2071 len += NLMSG_SPACE(headlen);
2073 skb = alloc_skb(len, GFP_ATOMIC);
2078 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2080 p = NLMSG_DATA(nlh);
2081 if (c->event == XFRM_MSG_DELPOLICY) {
2082 id = NLMSG_DATA(nlh);
2083 memset(id, 0, sizeof(*id));
2086 id->index = xp->index;
2088 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2090 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2093 nlh->nlmsg_flags = 0;
2095 copy_to_user_policy(xp, p, dir);
2096 if (copy_to_user_tmpl(xp, skb) < 0)
2098 if (copy_to_user_policy_type(xp, skb) < 0)
2101 nlh->nlmsg_len = skb->tail - b;
2103 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2104 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2112 static int xfrm_notify_policy_flush(struct km_event *c)
2114 struct nlmsghdr *nlh;
2115 struct sk_buff *skb;
2117 #ifdef CONFIG_XFRM_SUB_POLICY
2118 struct xfrm_userpolicy_type upt;
2120 int len = NLMSG_LENGTH(0);
2122 skb = alloc_skb(len, GFP_ATOMIC);
2128 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2129 nlh->nlmsg_flags = 0;
2131 #ifdef CONFIG_XFRM_SUB_POLICY
2132 memset(&upt, 0, sizeof(upt));
2133 upt.type = c->data.type;
2134 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
2137 nlh->nlmsg_len = skb->tail - b;
2139 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2140 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2143 #ifdef CONFIG_XFRM_SUB_POLICY
2150 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2154 case XFRM_MSG_NEWPOLICY:
2155 case XFRM_MSG_UPDPOLICY:
2156 case XFRM_MSG_DELPOLICY:
2157 return xfrm_notify_policy(xp, dir, c);
2158 case XFRM_MSG_FLUSHPOLICY:
2159 return xfrm_notify_policy_flush(c);
2160 case XFRM_MSG_POLEXPIRE:
2161 return xfrm_exp_policy_notify(xp, dir, c);
2163 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2170 static int build_report(struct sk_buff *skb, u8 proto,
2171 struct xfrm_selector *sel, xfrm_address_t *addr)
2173 struct xfrm_user_report *ur;
2174 struct nlmsghdr *nlh;
2175 unsigned char *b = skb->tail;
2177 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2178 ur = NLMSG_DATA(nlh);
2179 nlh->nlmsg_flags = 0;
2182 memcpy(&ur->sel, sel, sizeof(ur->sel));
2185 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2187 nlh->nlmsg_len = skb->tail - b;
2192 skb_trim(skb, b - skb->data);
2196 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2197 xfrm_address_t *addr)
2199 struct sk_buff *skb;
2202 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2203 skb = alloc_skb(len, GFP_ATOMIC);
2207 if (build_report(skb, proto, sel, addr) < 0)
2210 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2211 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2214 static struct xfrm_mgr netlink_mgr = {
2216 .notify = xfrm_send_state_notify,
2217 .acquire = xfrm_send_acquire,
2218 .compile_policy = xfrm_compile_policy,
2219 .notify_policy = xfrm_send_policy_notify,
2220 .report = xfrm_send_report,
2223 static int __init xfrm_user_init(void)
2227 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2229 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2230 xfrm_netlink_rcv, THIS_MODULE);
2233 rcu_assign_pointer(xfrm_nl, nlsk);
2235 xfrm_register_km(&netlink_mgr);
2240 static void __exit xfrm_user_exit(void)
2242 struct sock *nlsk = xfrm_nl;
2244 xfrm_unregister_km(&netlink_mgr);
2245 rcu_assign_pointer(xfrm_nl, NULL);
2247 sock_release(nlsk->sk_socket);
2250 module_init(xfrm_user_init);
2251 module_exit(xfrm_user_exit);
2252 MODULE_LICENSE("GPL");
2253 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);