1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
30 #include <asm/uaccess.h>
31 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32 #include <linux/in6.h>
34 #include <linux/audit.h>
36 static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
38 struct rtattr *rt = xfrma[type - 1];
39 struct xfrm_algo *algp;
45 len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp);
51 len -= (algp->alg_key_len + 7U) / 8;
57 if (!algp->alg_key_len &&
58 strcmp(algp->alg_name, "digest_null") != 0)
63 if (!algp->alg_key_len &&
64 strcmp(algp->alg_name, "cipher_null") != 0)
69 /* Zero length keys are legal. */
76 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
80 static int verify_encap_tmpl(struct rtattr **xfrma)
82 struct rtattr *rt = xfrma[XFRMA_ENCAP - 1];
83 struct xfrm_encap_tmpl *encap;
88 if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap))
94 static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
97 struct rtattr *rt = xfrma[type - 1];
102 if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
106 *addrp = RTA_DATA(rt);
111 static inline int verify_sec_ctx_len(struct rtattr **xfrma)
113 struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
114 struct xfrm_user_sec_ctx *uctx;
120 if (rt->rta_len < sizeof(*uctx))
125 len += sizeof(struct xfrm_user_sec_ctx);
126 len += uctx->ctx_len;
128 if (uctx->len != len)
135 static int verify_newsa_info(struct xfrm_usersa_info *p,
136 struct rtattr **xfrma)
146 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
158 switch (p->id.proto) {
160 if (!xfrma[XFRMA_ALG_AUTH-1] ||
161 xfrma[XFRMA_ALG_CRYPT-1] ||
162 xfrma[XFRMA_ALG_COMP-1])
167 if ((!xfrma[XFRMA_ALG_AUTH-1] &&
168 !xfrma[XFRMA_ALG_CRYPT-1]) ||
169 xfrma[XFRMA_ALG_COMP-1])
174 if (!xfrma[XFRMA_ALG_COMP-1] ||
175 xfrma[XFRMA_ALG_AUTH-1] ||
176 xfrma[XFRMA_ALG_CRYPT-1])
180 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
181 case IPPROTO_DSTOPTS:
182 case IPPROTO_ROUTING:
183 if (xfrma[XFRMA_ALG_COMP-1] ||
184 xfrma[XFRMA_ALG_AUTH-1] ||
185 xfrma[XFRMA_ALG_CRYPT-1] ||
186 xfrma[XFRMA_ENCAP-1] ||
187 xfrma[XFRMA_SEC_CTX-1] ||
188 !xfrma[XFRMA_COADDR-1])
197 if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH)))
199 if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT)))
201 if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP)))
203 if ((err = verify_encap_tmpl(xfrma)))
205 if ((err = verify_sec_ctx_len(xfrma)))
207 if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
212 case XFRM_MODE_TRANSPORT:
213 case XFRM_MODE_TUNNEL:
214 case XFRM_MODE_ROUTEOPTIMIZATION:
228 static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
229 struct xfrm_algo_desc *(*get_byname)(char *, int),
230 struct rtattr *u_arg)
232 struct rtattr *rta = u_arg;
233 struct xfrm_algo *p, *ualg;
234 struct xfrm_algo_desc *algo;
240 ualg = RTA_DATA(rta);
242 algo = get_byname(ualg->alg_name, 1);
245 *props = algo->desc.sadb_alg_id;
247 len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
248 p = kmemdup(ualg, len, GFP_KERNEL);
252 strcpy(p->alg_name, algo->name);
257 static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
259 struct rtattr *rta = u_arg;
260 struct xfrm_encap_tmpl *p, *uencap;
265 uencap = RTA_DATA(rta);
266 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
275 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
280 len += sizeof(struct xfrm_user_sec_ctx);
281 len += xfrm_ctx->ctx_len;
286 static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
288 struct xfrm_user_sec_ctx *uctx;
293 uctx = RTA_DATA(u_arg);
294 return security_xfrm_state_alloc(x, uctx);
297 static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
299 struct rtattr *rta = u_arg;
300 xfrm_address_t *p, *uaddrp;
305 uaddrp = RTA_DATA(rta);
306 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
314 static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
316 memcpy(&x->id, &p->id, sizeof(x->id));
317 memcpy(&x->sel, &p->sel, sizeof(x->sel));
318 memcpy(&x->lft, &p->lft, sizeof(x->lft));
319 x->props.mode = p->mode;
320 x->props.replay_window = p->replay_window;
321 x->props.reqid = p->reqid;
322 x->props.family = p->family;
323 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
324 x->props.flags = p->flags;
328 * someday when pfkey also has support, we could have the code
329 * somehow made shareable and move it to xfrm_state.c - JHS
332 static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
335 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
336 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
337 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
338 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
341 struct xfrm_replay_state *replay;
342 if (RTA_PAYLOAD(rp) < sizeof(*replay))
344 replay = RTA_DATA(rp);
345 memcpy(&x->replay, replay, sizeof(*replay));
346 memcpy(&x->preplay, replay, sizeof(*replay));
350 struct xfrm_lifetime_cur *ltime;
351 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
353 ltime = RTA_DATA(lt);
354 x->curlft.bytes = ltime->bytes;
355 x->curlft.packets = ltime->packets;
356 x->curlft.add_time = ltime->add_time;
357 x->curlft.use_time = ltime->use_time;
361 if (RTA_PAYLOAD(et) < sizeof(u32))
363 x->replay_maxage = *(u32*)RTA_DATA(et);
367 if (RTA_PAYLOAD(rt) < sizeof(u32))
369 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
377 static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
378 struct rtattr **xfrma,
381 struct xfrm_state *x = xfrm_state_alloc();
387 copy_from_user_state(x, p);
389 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
390 xfrm_aalg_get_byname,
391 xfrma[XFRMA_ALG_AUTH-1])))
393 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
394 xfrm_ealg_get_byname,
395 xfrma[XFRMA_ALG_CRYPT-1])))
397 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
398 xfrm_calg_get_byname,
399 xfrma[XFRMA_ALG_COMP-1])))
401 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
403 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
405 err = xfrm_init_state(x);
409 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
413 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
414 /* sysctl_xfrm_aevent_etime is in 100ms units */
415 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
416 x->preplay.bitmap = 0;
417 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
418 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
420 /* override default values from above */
422 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
429 x->km.state = XFRM_STATE_DEAD;
436 static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
437 struct rtattr **xfrma)
439 struct xfrm_usersa_info *p = NLMSG_DATA(nlh);
440 struct xfrm_state *x;
444 err = verify_newsa_info(p, xfrma);
448 x = xfrm_state_construct(p, xfrma, &err);
453 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
454 err = xfrm_state_add(x);
456 err = xfrm_state_update(x);
458 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
459 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
462 x->km.state = XFRM_STATE_DEAD;
467 c.seq = nlh->nlmsg_seq;
468 c.pid = nlh->nlmsg_pid;
469 c.event = nlh->nlmsg_type;
471 km_state_notify(x, &c);
477 static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
478 struct rtattr **xfrma,
481 struct xfrm_state *x = NULL;
484 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
486 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
488 xfrm_address_t *saddr = NULL;
490 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
500 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
510 static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
511 struct rtattr **xfrma)
513 struct xfrm_state *x;
516 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
518 x = xfrm_user_state_lookup(p, xfrma, &err);
522 if ((err = security_xfrm_state_delete(x)) != 0)
525 if (xfrm_state_kern(x)) {
530 err = xfrm_state_delete(x);
535 c.seq = nlh->nlmsg_seq;
536 c.pid = nlh->nlmsg_pid;
537 c.event = nlh->nlmsg_type;
538 km_state_notify(x, &c);
541 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
542 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
547 static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
549 memcpy(&p->id, &x->id, sizeof(p->id));
550 memcpy(&p->sel, &x->sel, sizeof(p->sel));
551 memcpy(&p->lft, &x->lft, sizeof(p->lft));
552 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
553 memcpy(&p->stats, &x->stats, sizeof(p->stats));
554 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
555 p->mode = x->props.mode;
556 p->replay_window = x->props.replay_window;
557 p->reqid = x->props.reqid;
558 p->family = x->props.family;
559 p->flags = x->props.flags;
563 struct xfrm_dump_info {
564 struct sk_buff *in_skb;
565 struct sk_buff *out_skb;
572 static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
574 struct xfrm_dump_info *sp = ptr;
575 struct sk_buff *in_skb = sp->in_skb;
576 struct sk_buff *skb = sp->out_skb;
577 struct xfrm_usersa_info *p;
578 struct nlmsghdr *nlh;
579 unsigned char *b = skb_tail_pointer(skb);
581 if (sp->this_idx < sp->start_idx)
584 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
586 XFRM_MSG_NEWSA, sizeof(*p));
587 nlh->nlmsg_flags = sp->nlmsg_flags;
590 copy_to_user_state(x, p);
593 RTA_PUT(skb, XFRMA_ALG_AUTH,
594 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
596 RTA_PUT(skb, XFRMA_ALG_CRYPT,
597 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
599 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
602 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
605 int ctx_size = sizeof(struct xfrm_sec_ctx) +
606 x->security->ctx_len;
607 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
608 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
610 uctx->exttype = XFRMA_SEC_CTX;
611 uctx->len = ctx_size;
612 uctx->ctx_doi = x->security->ctx_doi;
613 uctx->ctx_alg = x->security->ctx_alg;
614 uctx->ctx_len = x->security->ctx_len;
615 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
619 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
622 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
624 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
635 static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
637 struct xfrm_dump_info info;
639 info.in_skb = cb->skb;
641 info.nlmsg_seq = cb->nlh->nlmsg_seq;
642 info.nlmsg_flags = NLM_F_MULTI;
644 info.start_idx = cb->args[0];
645 (void) xfrm_state_walk(0, dump_one_state, &info);
646 cb->args[0] = info.this_idx;
651 static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
652 struct xfrm_state *x, u32 seq)
654 struct xfrm_dump_info info;
657 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
659 return ERR_PTR(-ENOMEM);
661 info.in_skb = in_skb;
663 info.nlmsg_seq = seq;
664 info.nlmsg_flags = 0;
665 info.this_idx = info.start_idx = 0;
667 if (dump_one_state(x, 0, &info)) {
675 static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
677 struct xfrm_spdinfo si;
678 struct nlmsghdr *nlh;
681 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
682 if (nlh == NULL) /* shouldnt really happen ... */
687 xfrm_spd_getinfo(&si);
689 if (flags & XFRM_SPD_HMASK)
690 NLA_PUT_U32(skb, XFRMA_SPDHMASK, si.spdhcnt);
691 if (flags & XFRM_SPD_HMAX)
692 NLA_PUT_U32(skb, XFRMA_SPDHMAX, si.spdhmcnt);
693 if (flags & XFRM_SPD_ICNT)
694 NLA_PUT_U32(skb, XFRMA_SPDICNT, si.incnt);
695 if (flags & XFRM_SPD_OCNT)
696 NLA_PUT_U32(skb, XFRMA_SPDOCNT, si.outcnt);
697 if (flags & XFRM_SPD_FCNT)
698 NLA_PUT_U32(skb, XFRMA_SPDFCNT, si.fwdcnt);
699 if (flags & XFRM_SPD_ISCNT)
700 NLA_PUT_U32(skb, XFRMA_SPDISCNT, si.inscnt);
701 if (flags & XFRM_SPD_OSCNT)
702 NLA_PUT_U32(skb, XFRMA_SPDOSCNT, si.inscnt);
703 if (flags & XFRM_SPD_FSCNT)
704 NLA_PUT_U32(skb, XFRMA_SPDFSCNT, si.inscnt);
706 return nlmsg_end(skb, nlh);
709 nlmsg_cancel(skb, nlh);
713 static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
714 struct rtattr **xfrma)
716 struct sk_buff *r_skb;
717 u32 *flags = NLMSG_DATA(nlh);
718 u32 spid = NETLINK_CB(skb).pid;
719 u32 seq = nlh->nlmsg_seq;
720 int len = NLMSG_LENGTH(sizeof(u32));
723 if (*flags & XFRM_SPD_HMASK)
724 len += RTA_SPACE(sizeof(u32));
725 if (*flags & XFRM_SPD_HMAX)
726 len += RTA_SPACE(sizeof(u32));
727 if (*flags & XFRM_SPD_ICNT)
728 len += RTA_SPACE(sizeof(u32));
729 if (*flags & XFRM_SPD_OCNT)
730 len += RTA_SPACE(sizeof(u32));
731 if (*flags & XFRM_SPD_FCNT)
732 len += RTA_SPACE(sizeof(u32));
733 if (*flags & XFRM_SPD_ISCNT)
734 len += RTA_SPACE(sizeof(u32));
735 if (*flags & XFRM_SPD_OSCNT)
736 len += RTA_SPACE(sizeof(u32));
737 if (*flags & XFRM_SPD_FSCNT)
738 len += RTA_SPACE(sizeof(u32));
740 r_skb = alloc_skb(len, GFP_ATOMIC);
744 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
747 return nlmsg_unicast(xfrm_nl, r_skb, spid);
750 static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
752 struct xfrm_sadinfo si;
753 struct nlmsghdr *nlh;
756 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
757 if (nlh == NULL) /* shouldnt really happen ... */
762 xfrm_sad_getinfo(&si);
764 if (flags & XFRM_SAD_HMASK)
765 NLA_PUT_U32(skb, XFRMA_SADHMASK, si.sadhcnt);
766 if (flags & XFRM_SAD_HMAX)
767 NLA_PUT_U32(skb, XFRMA_SADHMAX, si.sadhmcnt);
768 if (flags & XFRM_SAD_CNT)
769 NLA_PUT_U32(skb, XFRMA_SADCNT, si.sadcnt);
771 return nlmsg_end(skb, nlh);
774 nlmsg_cancel(skb, nlh);
778 static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
779 struct rtattr **xfrma)
781 struct sk_buff *r_skb;
782 u32 *flags = NLMSG_DATA(nlh);
783 u32 spid = NETLINK_CB(skb).pid;
784 u32 seq = nlh->nlmsg_seq;
785 int len = NLMSG_LENGTH(sizeof(u32));
787 if (*flags & XFRM_SAD_HMASK)
788 len += RTA_SPACE(sizeof(u32));
789 if (*flags & XFRM_SAD_HMAX)
790 len += RTA_SPACE(sizeof(u32));
791 if (*flags & XFRM_SAD_CNT)
792 len += RTA_SPACE(sizeof(u32));
794 r_skb = alloc_skb(len, GFP_ATOMIC);
799 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
802 return nlmsg_unicast(xfrm_nl, r_skb, spid);
805 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
806 struct rtattr **xfrma)
808 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
809 struct xfrm_state *x;
810 struct sk_buff *resp_skb;
813 x = xfrm_user_state_lookup(p, xfrma, &err);
817 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
818 if (IS_ERR(resp_skb)) {
819 err = PTR_ERR(resp_skb);
821 err = netlink_unicast(xfrm_nl, resp_skb,
822 NETLINK_CB(skb).pid, MSG_DONTWAIT);
829 static int verify_userspi_info(struct xfrm_userspi_info *p)
831 switch (p->info.id.proto) {
837 /* IPCOMP spi is 16-bits. */
838 if (p->max >= 0x10000)
852 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
853 struct rtattr **xfrma)
855 struct xfrm_state *x;
856 struct xfrm_userspi_info *p;
857 struct sk_buff *resp_skb;
858 xfrm_address_t *daddr;
863 err = verify_userspi_info(p);
867 family = p->info.family;
868 daddr = &p->info.id.daddr;
872 x = xfrm_find_acq_byseq(p->info.seq);
873 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
880 x = xfrm_find_acq(p->info.mode, p->info.reqid,
881 p->info.id.proto, daddr,
888 resp_skb = ERR_PTR(-ENOENT);
890 spin_lock_bh(&x->lock);
891 if (x->km.state != XFRM_STATE_DEAD) {
892 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
894 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
896 spin_unlock_bh(&x->lock);
898 if (IS_ERR(resp_skb)) {
899 err = PTR_ERR(resp_skb);
903 err = netlink_unicast(xfrm_nl, resp_skb,
904 NETLINK_CB(skb).pid, MSG_DONTWAIT);
912 static int verify_policy_dir(u8 dir)
916 case XFRM_POLICY_OUT:
917 case XFRM_POLICY_FWD:
927 static int verify_policy_type(u8 type)
930 case XFRM_POLICY_TYPE_MAIN:
931 #ifdef CONFIG_XFRM_SUB_POLICY
932 case XFRM_POLICY_TYPE_SUB:
943 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
947 case XFRM_SHARE_SESSION:
948 case XFRM_SHARE_USER:
949 case XFRM_SHARE_UNIQUE:
957 case XFRM_POLICY_ALLOW:
958 case XFRM_POLICY_BLOCK:
965 switch (p->sel.family) {
970 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
973 return -EAFNOSUPPORT;
980 return verify_policy_dir(p->dir);
983 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
985 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
986 struct xfrm_user_sec_ctx *uctx;
992 return security_xfrm_policy_alloc(pol, uctx);
995 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1001 for (i = 0; i < nr; i++, ut++) {
1002 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1004 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1005 memcpy(&t->saddr, &ut->saddr,
1006 sizeof(xfrm_address_t));
1007 t->reqid = ut->reqid;
1009 t->share = ut->share;
1010 t->optional = ut->optional;
1011 t->aalgos = ut->aalgos;
1012 t->ealgos = ut->ealgos;
1013 t->calgos = ut->calgos;
1014 t->encap_family = ut->family;
1018 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1022 if (nr > XFRM_MAX_DEPTH)
1025 for (i = 0; i < nr; i++) {
1026 /* We never validated the ut->family value, so many
1027 * applications simply leave it at zero. The check was
1028 * never made and ut->family was ignored because all
1029 * templates could be assumed to have the same family as
1030 * the policy itself. Now that we will have ipv4-in-ipv6
1031 * and ipv6-in-ipv4 tunnels, this is no longer true.
1034 ut[i].family = family;
1036 switch (ut[i].family) {
1039 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1051 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1053 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1058 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1059 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1062 err = validate_tmpl(nr, utmpl, pol->family);
1066 copy_templates(pol, RTA_DATA(rt), nr);
1071 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1073 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1074 struct xfrm_userpolicy_type *upt;
1075 u8 type = XFRM_POLICY_TYPE_MAIN;
1079 if (rt->rta_len < sizeof(*upt))
1086 err = verify_policy_type(type);
1094 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1096 xp->priority = p->priority;
1097 xp->index = p->index;
1098 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1099 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1100 xp->action = p->action;
1101 xp->flags = p->flags;
1102 xp->family = p->sel.family;
1103 /* XXX xp->share = p->share; */
1106 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1108 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1109 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1110 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1111 p->priority = xp->priority;
1112 p->index = xp->index;
1113 p->sel.family = xp->family;
1115 p->action = xp->action;
1116 p->flags = xp->flags;
1117 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1120 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1122 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1130 copy_from_user_policy(xp, p);
1132 err = copy_from_user_policy_type(&xp->type, xfrma);
1136 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1137 err = copy_from_user_sec_ctx(xp, xfrma);
1148 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1149 struct rtattr **xfrma)
1151 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1152 struct xfrm_policy *xp;
1157 err = verify_newpolicy_info(p);
1160 err = verify_sec_ctx_len(xfrma);
1164 xp = xfrm_policy_construct(p, xfrma, &err);
1168 /* shouldnt excl be based on nlh flags??
1169 * Aha! this is anti-netlink really i.e more pfkey derived
1170 * in netlink excl is a flag and you wouldnt need
1171 * a type XFRM_MSG_UPDPOLICY - JHS */
1172 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1173 err = xfrm_policy_insert(p->dir, xp, excl);
1174 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1175 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1178 security_xfrm_policy_free(xp);
1183 c.event = nlh->nlmsg_type;
1184 c.seq = nlh->nlmsg_seq;
1185 c.pid = nlh->nlmsg_pid;
1186 km_policy_notify(xp, p->dir, &c);
1193 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1195 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1198 if (xp->xfrm_nr == 0)
1201 for (i = 0; i < xp->xfrm_nr; i++) {
1202 struct xfrm_user_tmpl *up = &vec[i];
1203 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1205 memcpy(&up->id, &kp->id, sizeof(up->id));
1206 up->family = kp->encap_family;
1207 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1208 up->reqid = kp->reqid;
1209 up->mode = kp->mode;
1210 up->share = kp->share;
1211 up->optional = kp->optional;
1212 up->aalgos = kp->aalgos;
1213 up->ealgos = kp->ealgos;
1214 up->calgos = kp->calgos;
1216 RTA_PUT(skb, XFRMA_TMPL,
1217 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1226 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1228 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1229 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1230 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1232 uctx->exttype = XFRMA_SEC_CTX;
1233 uctx->len = ctx_size;
1234 uctx->ctx_doi = s->ctx_doi;
1235 uctx->ctx_alg = s->ctx_alg;
1236 uctx->ctx_len = s->ctx_len;
1237 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1244 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1247 return copy_sec_ctx(x->security, skb);
1252 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1255 return copy_sec_ctx(xp->security, skb);
1260 #ifdef CONFIG_XFRM_SUB_POLICY
1261 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1263 struct xfrm_userpolicy_type upt;
1265 memset(&upt, 0, sizeof(upt));
1268 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1277 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1283 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1285 struct xfrm_dump_info *sp = ptr;
1286 struct xfrm_userpolicy_info *p;
1287 struct sk_buff *in_skb = sp->in_skb;
1288 struct sk_buff *skb = sp->out_skb;
1289 struct nlmsghdr *nlh;
1290 unsigned char *b = skb_tail_pointer(skb);
1292 if (sp->this_idx < sp->start_idx)
1295 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1297 XFRM_MSG_NEWPOLICY, sizeof(*p));
1298 p = NLMSG_DATA(nlh);
1299 nlh->nlmsg_flags = sp->nlmsg_flags;
1301 copy_to_user_policy(xp, p, dir);
1302 if (copy_to_user_tmpl(xp, skb) < 0)
1304 if (copy_to_user_sec_ctx(xp, skb))
1306 if (copy_to_user_policy_type(xp->type, skb) < 0)
1309 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1319 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1321 struct xfrm_dump_info info;
1323 info.in_skb = cb->skb;
1325 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1326 info.nlmsg_flags = NLM_F_MULTI;
1328 info.start_idx = cb->args[0];
1329 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1330 #ifdef CONFIG_XFRM_SUB_POLICY
1331 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1333 cb->args[0] = info.this_idx;
1338 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1339 struct xfrm_policy *xp,
1342 struct xfrm_dump_info info;
1343 struct sk_buff *skb;
1345 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1347 return ERR_PTR(-ENOMEM);
1349 info.in_skb = in_skb;
1351 info.nlmsg_seq = seq;
1352 info.nlmsg_flags = 0;
1353 info.this_idx = info.start_idx = 0;
1355 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1363 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1364 struct rtattr **xfrma)
1366 struct xfrm_policy *xp;
1367 struct xfrm_userpolicy_id *p;
1368 u8 type = XFRM_POLICY_TYPE_MAIN;
1373 p = NLMSG_DATA(nlh);
1374 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1376 err = copy_from_user_policy_type(&type, xfrma);
1380 err = verify_policy_dir(p->dir);
1385 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1387 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1388 struct xfrm_policy tmp;
1390 err = verify_sec_ctx_len(xfrma);
1394 memset(&tmp, 0, sizeof(struct xfrm_policy));
1396 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1398 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1401 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1403 security_xfrm_policy_free(&tmp);
1409 struct sk_buff *resp_skb;
1411 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1412 if (IS_ERR(resp_skb)) {
1413 err = PTR_ERR(resp_skb);
1415 err = netlink_unicast(xfrm_nl, resp_skb,
1416 NETLINK_CB(skb).pid,
1420 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1421 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1426 c.data.byid = p->index;
1427 c.event = nlh->nlmsg_type;
1428 c.seq = nlh->nlmsg_seq;
1429 c.pid = nlh->nlmsg_pid;
1430 km_policy_notify(xp, p->dir, &c);
1438 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1439 struct rtattr **xfrma)
1442 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1443 struct xfrm_audit audit_info;
1445 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1446 audit_info.secid = NETLINK_CB(skb).sid;
1447 xfrm_state_flush(p->proto, &audit_info);
1448 c.data.proto = p->proto;
1449 c.event = nlh->nlmsg_type;
1450 c.seq = nlh->nlmsg_seq;
1451 c.pid = nlh->nlmsg_pid;
1452 km_state_notify(NULL, &c);
1458 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1460 struct xfrm_aevent_id *id;
1461 struct nlmsghdr *nlh;
1462 struct xfrm_lifetime_cur ltime;
1463 unsigned char *b = skb_tail_pointer(skb);
1465 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1466 id = NLMSG_DATA(nlh);
1467 nlh->nlmsg_flags = 0;
1469 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1470 id->sa_id.spi = x->id.spi;
1471 id->sa_id.family = x->props.family;
1472 id->sa_id.proto = x->id.proto;
1473 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1474 id->reqid = x->props.reqid;
1475 id->flags = c->data.aevent;
1477 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1479 ltime.bytes = x->curlft.bytes;
1480 ltime.packets = x->curlft.packets;
1481 ltime.add_time = x->curlft.add_time;
1482 ltime.use_time = x->curlft.use_time;
1484 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1486 if (id->flags&XFRM_AE_RTHR) {
1487 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1490 if (id->flags&XFRM_AE_ETHR) {
1491 u32 etimer = x->replay_maxage*10/HZ;
1492 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1495 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1504 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1505 struct rtattr **xfrma)
1507 struct xfrm_state *x;
1508 struct sk_buff *r_skb;
1511 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1512 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1513 struct xfrm_usersa_id *id = &p->sa_id;
1515 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1516 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1518 if (p->flags&XFRM_AE_RTHR)
1519 len+=RTA_SPACE(sizeof(u32));
1521 if (p->flags&XFRM_AE_ETHR)
1522 len+=RTA_SPACE(sizeof(u32));
1524 r_skb = alloc_skb(len, GFP_ATOMIC);
1528 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1535 * XXX: is this lock really needed - none of the other
1536 * gets lock (the concern is things getting updated
1537 * while we are still reading) - jhs
1539 spin_lock_bh(&x->lock);
1540 c.data.aevent = p->flags;
1541 c.seq = nlh->nlmsg_seq;
1542 c.pid = nlh->nlmsg_pid;
1544 if (build_aevent(r_skb, x, &c) < 0)
1546 err = netlink_unicast(xfrm_nl, r_skb,
1547 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1548 spin_unlock_bh(&x->lock);
1553 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1554 struct rtattr **xfrma)
1556 struct xfrm_state *x;
1559 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1560 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1561 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1566 /* pedantic mode - thou shalt sayeth replaceth */
1567 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1570 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1574 if (x->km.state != XFRM_STATE_VALID)
1577 spin_lock_bh(&x->lock);
1578 err = xfrm_update_ae_params(x, xfrma);
1579 spin_unlock_bh(&x->lock);
1583 c.event = nlh->nlmsg_type;
1584 c.seq = nlh->nlmsg_seq;
1585 c.pid = nlh->nlmsg_pid;
1586 c.data.aevent = XFRM_AE_CU;
1587 km_state_notify(x, &c);
1594 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1595 struct rtattr **xfrma)
1598 u8 type = XFRM_POLICY_TYPE_MAIN;
1600 struct xfrm_audit audit_info;
1602 err = copy_from_user_policy_type(&type, xfrma);
1606 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1607 audit_info.secid = NETLINK_CB(skb).sid;
1608 xfrm_policy_flush(type, &audit_info);
1610 c.event = nlh->nlmsg_type;
1611 c.seq = nlh->nlmsg_seq;
1612 c.pid = nlh->nlmsg_pid;
1613 km_policy_notify(NULL, 0, &c);
1617 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1618 struct rtattr **xfrma)
1620 struct xfrm_policy *xp;
1621 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1622 struct xfrm_userpolicy_info *p = &up->pol;
1623 u8 type = XFRM_POLICY_TYPE_MAIN;
1626 err = copy_from_user_policy_type(&type, xfrma);
1631 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1633 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1634 struct xfrm_policy tmp;
1636 err = verify_sec_ctx_len(xfrma);
1640 memset(&tmp, 0, sizeof(struct xfrm_policy));
1642 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1644 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1647 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1649 security_xfrm_policy_free(&tmp);
1654 read_lock(&xp->lock);
1656 read_unlock(&xp->lock);
1660 read_unlock(&xp->lock);
1663 xfrm_policy_delete(xp, p->dir);
1664 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1665 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1668 // reset the timers here?
1669 printk("Dont know what to do with soft policy expire\n");
1671 km_policy_expired(xp, p->dir, up->hard, current->pid);
1678 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1679 struct rtattr **xfrma)
1681 struct xfrm_state *x;
1683 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1684 struct xfrm_usersa_info *p = &ue->state;
1686 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1692 spin_lock_bh(&x->lock);
1694 if (x->km.state != XFRM_STATE_VALID)
1696 km_state_expired(x, ue->hard, current->pid);
1699 __xfrm_state_delete(x);
1700 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1701 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1705 spin_unlock_bh(&x->lock);
1710 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1711 struct rtattr **xfrma)
1713 struct xfrm_policy *xp;
1714 struct xfrm_user_tmpl *ut;
1716 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1718 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1719 struct xfrm_state *x = xfrm_state_alloc();
1725 err = verify_newpolicy_info(&ua->policy);
1727 printk("BAD policy passed\n");
1733 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1739 memcpy(&x->id, &ua->id, sizeof(ua->id));
1740 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1741 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1744 /* extract the templates and for each call km_key */
1745 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1746 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1747 memcpy(&x->id, &t->id, sizeof(x->id));
1748 x->props.mode = t->mode;
1749 x->props.reqid = t->reqid;
1750 x->props.family = ut->family;
1751 t->aalgos = ua->aalgos;
1752 t->ealgos = ua->ealgos;
1753 t->calgos = ua->calgos;
1754 err = km_query(x, t, xp);
1764 #ifdef CONFIG_XFRM_MIGRATE
1765 static int verify_user_migrate(struct rtattr **xfrma)
1767 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1768 struct xfrm_user_migrate *um;
1773 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1779 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1780 struct rtattr **xfrma, int *num)
1782 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1783 struct xfrm_user_migrate *um;
1787 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1789 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1792 for (i = 0; i < num_migrate; i++, um++, ma++) {
1793 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1794 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1795 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1796 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1798 ma->proto = um->proto;
1799 ma->mode = um->mode;
1800 ma->reqid = um->reqid;
1802 ma->old_family = um->old_family;
1803 ma->new_family = um->new_family;
1810 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1811 struct rtattr **xfrma)
1813 struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
1814 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1819 err = verify_user_migrate((struct rtattr **)xfrma);
1823 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1827 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1828 (struct rtattr **)xfrma, &n);
1835 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1840 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1841 struct rtattr **xfrma)
1843 return -ENOPROTOOPT;
1847 #ifdef CONFIG_XFRM_MIGRATE
1848 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1850 struct xfrm_user_migrate um;
1852 memset(&um, 0, sizeof(um));
1853 um.proto = m->proto;
1855 um.reqid = m->reqid;
1856 um.old_family = m->old_family;
1857 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1858 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1859 um.new_family = m->new_family;
1860 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1861 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1863 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1870 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1871 int num_migrate, struct xfrm_selector *sel,
1874 struct xfrm_migrate *mp;
1875 struct xfrm_userpolicy_id *pol_id;
1876 struct nlmsghdr *nlh;
1877 unsigned char *b = skb_tail_pointer(skb);
1880 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id));
1881 pol_id = NLMSG_DATA(nlh);
1882 nlh->nlmsg_flags = 0;
1884 /* copy data from selector, dir, and type to the pol_id */
1885 memset(pol_id, 0, sizeof(*pol_id));
1886 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1889 if (copy_to_user_policy_type(type, skb) < 0)
1892 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1893 if (copy_to_user_migrate(mp, skb) < 0)
1897 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1904 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1905 struct xfrm_migrate *m, int num_migrate)
1907 struct sk_buff *skb;
1910 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1911 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1912 #ifdef CONFIG_XFRM_SUB_POLICY
1913 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1915 skb = alloc_skb(len, GFP_ATOMIC);
1920 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1923 NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
1924 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
1928 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1929 struct xfrm_migrate *m, int num_migrate)
1931 return -ENOPROTOOPT;
1935 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1937 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1938 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1939 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1940 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1941 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1942 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1943 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1944 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1945 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1946 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1947 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1948 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1949 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1950 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1951 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1952 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1953 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1954 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1955 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1956 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1957 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1962 static struct xfrm_link {
1963 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1964 int (*dump)(struct sk_buff *, struct netlink_callback *);
1965 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1966 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1967 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1968 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1969 .dump = xfrm_dump_sa },
1970 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1971 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1972 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1973 .dump = xfrm_dump_policy },
1974 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1975 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1976 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1977 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1978 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1979 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1980 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1981 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1982 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1983 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1984 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1985 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1986 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1989 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1991 struct rtattr *xfrma[XFRMA_MAX];
1992 struct xfrm_link *link;
1995 type = nlh->nlmsg_type;
1996 if (type > XFRM_MSG_MAX)
1999 type -= XFRM_MSG_BASE;
2000 link = &xfrm_dispatch[type];
2002 /* All operations require privileges, even GET */
2003 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2006 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2007 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2008 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2009 if (link->dump == NULL)
2012 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
2015 memset(xfrma, 0, sizeof(xfrma));
2017 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
2020 if (nlh->nlmsg_len > min_len) {
2021 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2022 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
2024 while (RTA_OK(attr, attrlen)) {
2025 unsigned short flavor = attr->rta_type;
2027 if (flavor > XFRMA_MAX)
2029 xfrma[flavor - 1] = attr;
2031 attr = RTA_NEXT(attr, attrlen);
2035 if (link->doit == NULL)
2038 return link->doit(skb, nlh, xfrma);
2041 static void xfrm_netlink_rcv(struct sock *sk, int len)
2043 unsigned int qlen = 0;
2046 mutex_lock(&xfrm_cfg_mutex);
2047 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2048 mutex_unlock(&xfrm_cfg_mutex);
2053 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2055 struct xfrm_user_expire *ue;
2056 struct nlmsghdr *nlh;
2057 unsigned char *b = skb_tail_pointer(skb);
2059 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
2061 ue = NLMSG_DATA(nlh);
2062 nlh->nlmsg_flags = 0;
2064 copy_to_user_state(x, &ue->state);
2065 ue->hard = (c->data.hard != 0) ? 1 : 0;
2067 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2075 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2077 struct sk_buff *skb;
2078 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2080 skb = alloc_skb(len, GFP_ATOMIC);
2084 if (build_expire(skb, x, c) < 0)
2087 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2088 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2091 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2093 struct sk_buff *skb;
2094 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2096 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2097 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2098 skb = alloc_skb(len, GFP_ATOMIC);
2102 if (build_aevent(skb, x, c) < 0)
2105 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
2106 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2109 static int xfrm_notify_sa_flush(struct km_event *c)
2111 struct xfrm_usersa_flush *p;
2112 struct nlmsghdr *nlh;
2113 struct sk_buff *skb;
2115 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2117 skb = alloc_skb(len, GFP_ATOMIC);
2122 nlh = NLMSG_PUT(skb, c->pid, c->seq,
2123 XFRM_MSG_FLUSHSA, sizeof(*p));
2124 nlh->nlmsg_flags = 0;
2126 p = NLMSG_DATA(nlh);
2127 p->proto = c->data.proto;
2129 nlh->nlmsg_len = skb->tail - b;
2131 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2132 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2139 static inline int xfrm_sa_len(struct xfrm_state *x)
2143 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2145 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2147 l += RTA_SPACE(sizeof(*x->calg));
2149 l += RTA_SPACE(sizeof(*x->encap));
2154 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2156 struct xfrm_usersa_info *p;
2157 struct xfrm_usersa_id *id;
2158 struct nlmsghdr *nlh;
2159 struct sk_buff *skb;
2161 int len = xfrm_sa_len(x);
2164 headlen = sizeof(*p);
2165 if (c->event == XFRM_MSG_DELSA) {
2166 len += RTA_SPACE(headlen);
2167 headlen = sizeof(*id);
2169 len += NLMSG_SPACE(headlen);
2171 skb = alloc_skb(len, GFP_ATOMIC);
2176 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2177 nlh->nlmsg_flags = 0;
2179 p = NLMSG_DATA(nlh);
2180 if (c->event == XFRM_MSG_DELSA) {
2181 id = NLMSG_DATA(nlh);
2182 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2183 id->spi = x->id.spi;
2184 id->family = x->props.family;
2185 id->proto = x->id.proto;
2187 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2190 copy_to_user_state(x, p);
2193 RTA_PUT(skb, XFRMA_ALG_AUTH,
2194 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2196 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2197 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2199 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2202 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2204 nlh->nlmsg_len = skb->tail - b;
2206 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2207 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2215 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2219 case XFRM_MSG_EXPIRE:
2220 return xfrm_exp_state_notify(x, c);
2221 case XFRM_MSG_NEWAE:
2222 return xfrm_aevent_state_notify(x, c);
2223 case XFRM_MSG_DELSA:
2224 case XFRM_MSG_UPDSA:
2225 case XFRM_MSG_NEWSA:
2226 return xfrm_notify_sa(x, c);
2227 case XFRM_MSG_FLUSHSA:
2228 return xfrm_notify_sa_flush(c);
2230 printk("xfrm_user: Unknown SA event %d\n", c->event);
2238 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2239 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2242 struct xfrm_user_acquire *ua;
2243 struct nlmsghdr *nlh;
2244 unsigned char *b = skb_tail_pointer(skb);
2245 __u32 seq = xfrm_get_acqseq();
2247 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
2249 ua = NLMSG_DATA(nlh);
2250 nlh->nlmsg_flags = 0;
2252 memcpy(&ua->id, &x->id, sizeof(ua->id));
2253 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2254 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2255 copy_to_user_policy(xp, &ua->policy, dir);
2256 ua->aalgos = xt->aalgos;
2257 ua->ealgos = xt->ealgos;
2258 ua->calgos = xt->calgos;
2259 ua->seq = x->km.seq = seq;
2261 if (copy_to_user_tmpl(xp, skb) < 0)
2263 if (copy_to_user_state_sec_ctx(x, skb))
2265 if (copy_to_user_policy_type(xp->type, skb) < 0)
2268 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2276 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2277 struct xfrm_policy *xp, int dir)
2279 struct sk_buff *skb;
2282 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2283 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2284 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2285 #ifdef CONFIG_XFRM_SUB_POLICY
2286 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2288 skb = alloc_skb(len, GFP_ATOMIC);
2292 if (build_acquire(skb, x, xt, xp, dir) < 0)
2295 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2296 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2299 /* User gives us xfrm_user_policy_info followed by an array of 0
2300 * or more templates.
2302 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2303 u8 *data, int len, int *dir)
2305 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2306 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2307 struct xfrm_policy *xp;
2310 switch (sk->sk_family) {
2312 if (opt != IP_XFRM_POLICY) {
2317 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2319 if (opt != IPV6_XFRM_POLICY) {
2332 if (len < sizeof(*p) ||
2333 verify_newpolicy_info(p))
2336 nr = ((len - sizeof(*p)) / sizeof(*ut));
2337 if (validate_tmpl(nr, ut, p->sel.family))
2340 if (p->dir > XFRM_POLICY_OUT)
2343 xp = xfrm_policy_alloc(GFP_KERNEL);
2349 copy_from_user_policy(xp, p);
2350 xp->type = XFRM_POLICY_TYPE_MAIN;
2351 copy_templates(xp, ut, nr);
2358 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2359 int dir, struct km_event *c)
2361 struct xfrm_user_polexpire *upe;
2362 struct nlmsghdr *nlh;
2363 int hard = c->data.hard;
2364 unsigned char *b = skb_tail_pointer(skb);
2366 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2367 upe = NLMSG_DATA(nlh);
2368 nlh->nlmsg_flags = 0;
2370 copy_to_user_policy(xp, &upe->pol, dir);
2371 if (copy_to_user_tmpl(xp, skb) < 0)
2373 if (copy_to_user_sec_ctx(xp, skb))
2375 if (copy_to_user_policy_type(xp->type, skb) < 0)
2379 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2387 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2389 struct sk_buff *skb;
2392 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2393 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2394 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2395 #ifdef CONFIG_XFRM_SUB_POLICY
2396 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2398 skb = alloc_skb(len, GFP_ATOMIC);
2402 if (build_polexpire(skb, xp, dir, c) < 0)
2405 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2406 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2409 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2411 struct xfrm_userpolicy_info *p;
2412 struct xfrm_userpolicy_id *id;
2413 struct nlmsghdr *nlh;
2414 struct sk_buff *skb;
2416 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2419 headlen = sizeof(*p);
2420 if (c->event == XFRM_MSG_DELPOLICY) {
2421 len += RTA_SPACE(headlen);
2422 headlen = sizeof(*id);
2424 #ifdef CONFIG_XFRM_SUB_POLICY
2425 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2427 len += NLMSG_SPACE(headlen);
2429 skb = alloc_skb(len, GFP_ATOMIC);
2434 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2436 p = NLMSG_DATA(nlh);
2437 if (c->event == XFRM_MSG_DELPOLICY) {
2438 id = NLMSG_DATA(nlh);
2439 memset(id, 0, sizeof(*id));
2442 id->index = xp->index;
2444 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2446 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2449 nlh->nlmsg_flags = 0;
2451 copy_to_user_policy(xp, p, dir);
2452 if (copy_to_user_tmpl(xp, skb) < 0)
2454 if (copy_to_user_policy_type(xp->type, skb) < 0)
2457 nlh->nlmsg_len = skb->tail - b;
2459 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2460 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2468 static int xfrm_notify_policy_flush(struct km_event *c)
2470 struct nlmsghdr *nlh;
2471 struct sk_buff *skb;
2474 #ifdef CONFIG_XFRM_SUB_POLICY
2475 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2477 len += NLMSG_LENGTH(0);
2479 skb = alloc_skb(len, GFP_ATOMIC);
2485 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2486 nlh->nlmsg_flags = 0;
2487 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2490 nlh->nlmsg_len = skb->tail - b;
2492 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2493 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2500 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2504 case XFRM_MSG_NEWPOLICY:
2505 case XFRM_MSG_UPDPOLICY:
2506 case XFRM_MSG_DELPOLICY:
2507 return xfrm_notify_policy(xp, dir, c);
2508 case XFRM_MSG_FLUSHPOLICY:
2509 return xfrm_notify_policy_flush(c);
2510 case XFRM_MSG_POLEXPIRE:
2511 return xfrm_exp_policy_notify(xp, dir, c);
2513 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2520 static int build_report(struct sk_buff *skb, u8 proto,
2521 struct xfrm_selector *sel, xfrm_address_t *addr)
2523 struct xfrm_user_report *ur;
2524 struct nlmsghdr *nlh;
2525 unsigned char *b = skb_tail_pointer(skb);
2527 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2528 ur = NLMSG_DATA(nlh);
2529 nlh->nlmsg_flags = 0;
2532 memcpy(&ur->sel, sel, sizeof(ur->sel));
2535 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2537 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2546 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2547 xfrm_address_t *addr)
2549 struct sk_buff *skb;
2552 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2553 skb = alloc_skb(len, GFP_ATOMIC);
2557 if (build_report(skb, proto, sel, addr) < 0)
2560 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2561 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2564 static struct xfrm_mgr netlink_mgr = {
2566 .notify = xfrm_send_state_notify,
2567 .acquire = xfrm_send_acquire,
2568 .compile_policy = xfrm_compile_policy,
2569 .notify_policy = xfrm_send_policy_notify,
2570 .report = xfrm_send_report,
2571 .migrate = xfrm_send_migrate,
2574 static int __init xfrm_user_init(void)
2578 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2580 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2581 xfrm_netlink_rcv, NULL, THIS_MODULE);
2584 rcu_assign_pointer(xfrm_nl, nlsk);
2586 xfrm_register_km(&netlink_mgr);
2591 static void __exit xfrm_user_exit(void)
2593 struct sock *nlsk = xfrm_nl;
2595 xfrm_unregister_km(&netlink_mgr);
2596 rcu_assign_pointer(xfrm_nl, NULL);
2598 sock_release(nlsk->sk_socket);
2601 module_init(xfrm_user_init);
2602 module_exit(xfrm_user_exit);
2603 MODULE_LICENSE("GPL");
2604 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);