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 xfrmk_sadinfo si;
753 struct xfrmu_sadhinfo sh;
754 struct nlmsghdr *nlh;
757 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
758 if (nlh == NULL) /* shouldnt really happen ... */
763 xfrm_sad_getinfo(&si);
765 sh.sadhmcnt = si.sadhmcnt;
766 sh.sadhcnt = si.sadhcnt;
768 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
769 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
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 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
788 len += RTA_SPACE(sizeof(u32));
790 r_skb = alloc_skb(len, GFP_ATOMIC);
795 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
798 return nlmsg_unicast(xfrm_nl, r_skb, spid);
801 static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
802 struct rtattr **xfrma)
804 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
805 struct xfrm_state *x;
806 struct sk_buff *resp_skb;
809 x = xfrm_user_state_lookup(p, xfrma, &err);
813 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
814 if (IS_ERR(resp_skb)) {
815 err = PTR_ERR(resp_skb);
817 err = netlink_unicast(xfrm_nl, resp_skb,
818 NETLINK_CB(skb).pid, MSG_DONTWAIT);
825 static int verify_userspi_info(struct xfrm_userspi_info *p)
827 switch (p->info.id.proto) {
833 /* IPCOMP spi is 16-bits. */
834 if (p->max >= 0x10000)
848 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
849 struct rtattr **xfrma)
851 struct xfrm_state *x;
852 struct xfrm_userspi_info *p;
853 struct sk_buff *resp_skb;
854 xfrm_address_t *daddr;
859 err = verify_userspi_info(p);
863 family = p->info.family;
864 daddr = &p->info.id.daddr;
868 x = xfrm_find_acq_byseq(p->info.seq);
869 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
876 x = xfrm_find_acq(p->info.mode, p->info.reqid,
877 p->info.id.proto, daddr,
884 resp_skb = ERR_PTR(-ENOENT);
886 spin_lock_bh(&x->lock);
887 if (x->km.state != XFRM_STATE_DEAD) {
888 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
890 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
892 spin_unlock_bh(&x->lock);
894 if (IS_ERR(resp_skb)) {
895 err = PTR_ERR(resp_skb);
899 err = netlink_unicast(xfrm_nl, resp_skb,
900 NETLINK_CB(skb).pid, MSG_DONTWAIT);
908 static int verify_policy_dir(u8 dir)
912 case XFRM_POLICY_OUT:
913 case XFRM_POLICY_FWD:
923 static int verify_policy_type(u8 type)
926 case XFRM_POLICY_TYPE_MAIN:
927 #ifdef CONFIG_XFRM_SUB_POLICY
928 case XFRM_POLICY_TYPE_SUB:
939 static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
943 case XFRM_SHARE_SESSION:
944 case XFRM_SHARE_USER:
945 case XFRM_SHARE_UNIQUE:
953 case XFRM_POLICY_ALLOW:
954 case XFRM_POLICY_BLOCK:
961 switch (p->sel.family) {
966 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
969 return -EAFNOSUPPORT;
976 return verify_policy_dir(p->dir);
979 static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
981 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
982 struct xfrm_user_sec_ctx *uctx;
988 return security_xfrm_policy_alloc(pol, uctx);
991 static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
997 for (i = 0; i < nr; i++, ut++) {
998 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1000 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1001 memcpy(&t->saddr, &ut->saddr,
1002 sizeof(xfrm_address_t));
1003 t->reqid = ut->reqid;
1005 t->share = ut->share;
1006 t->optional = ut->optional;
1007 t->aalgos = ut->aalgos;
1008 t->ealgos = ut->ealgos;
1009 t->calgos = ut->calgos;
1010 t->encap_family = ut->family;
1014 static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1018 if (nr > XFRM_MAX_DEPTH)
1021 for (i = 0; i < nr; i++) {
1022 /* We never validated the ut->family value, so many
1023 * applications simply leave it at zero. The check was
1024 * never made and ut->family was ignored because all
1025 * templates could be assumed to have the same family as
1026 * the policy itself. Now that we will have ipv4-in-ipv6
1027 * and ipv6-in-ipv4 tunnels, this is no longer true.
1030 ut[i].family = family;
1032 switch (ut[i].family) {
1035 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1047 static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1049 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1054 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1055 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1058 err = validate_tmpl(nr, utmpl, pol->family);
1062 copy_templates(pol, RTA_DATA(rt), nr);
1067 static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1069 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1070 struct xfrm_userpolicy_type *upt;
1071 u8 type = XFRM_POLICY_TYPE_MAIN;
1075 if (rt->rta_len < sizeof(*upt))
1082 err = verify_policy_type(type);
1090 static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1092 xp->priority = p->priority;
1093 xp->index = p->index;
1094 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1095 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1096 xp->action = p->action;
1097 xp->flags = p->flags;
1098 xp->family = p->sel.family;
1099 /* XXX xp->share = p->share; */
1102 static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1104 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1105 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1106 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1107 p->priority = xp->priority;
1108 p->index = xp->index;
1109 p->sel.family = xp->family;
1111 p->action = xp->action;
1112 p->flags = xp->flags;
1113 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1116 static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1118 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1126 copy_from_user_policy(xp, p);
1128 err = copy_from_user_policy_type(&xp->type, xfrma);
1132 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1133 err = copy_from_user_sec_ctx(xp, xfrma);
1144 static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1145 struct rtattr **xfrma)
1147 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1148 struct xfrm_policy *xp;
1153 err = verify_newpolicy_info(p);
1156 err = verify_sec_ctx_len(xfrma);
1160 xp = xfrm_policy_construct(p, xfrma, &err);
1164 /* shouldnt excl be based on nlh flags??
1165 * Aha! this is anti-netlink really i.e more pfkey derived
1166 * in netlink excl is a flag and you wouldnt need
1167 * a type XFRM_MSG_UPDPOLICY - JHS */
1168 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1169 err = xfrm_policy_insert(p->dir, xp, excl);
1170 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1171 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1174 security_xfrm_policy_free(xp);
1179 c.event = nlh->nlmsg_type;
1180 c.seq = nlh->nlmsg_seq;
1181 c.pid = nlh->nlmsg_pid;
1182 km_policy_notify(xp, p->dir, &c);
1189 static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1191 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1194 if (xp->xfrm_nr == 0)
1197 for (i = 0; i < xp->xfrm_nr; i++) {
1198 struct xfrm_user_tmpl *up = &vec[i];
1199 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1201 memcpy(&up->id, &kp->id, sizeof(up->id));
1202 up->family = kp->encap_family;
1203 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1204 up->reqid = kp->reqid;
1205 up->mode = kp->mode;
1206 up->share = kp->share;
1207 up->optional = kp->optional;
1208 up->aalgos = kp->aalgos;
1209 up->ealgos = kp->ealgos;
1210 up->calgos = kp->calgos;
1212 RTA_PUT(skb, XFRMA_TMPL,
1213 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1222 static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
1224 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1225 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1226 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1228 uctx->exttype = XFRMA_SEC_CTX;
1229 uctx->len = ctx_size;
1230 uctx->ctx_doi = s->ctx_doi;
1231 uctx->ctx_alg = s->ctx_alg;
1232 uctx->ctx_len = s->ctx_len;
1233 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
1240 static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1243 return copy_sec_ctx(x->security, skb);
1248 static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1251 return copy_sec_ctx(xp->security, skb);
1256 #ifdef CONFIG_XFRM_SUB_POLICY
1257 static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1259 struct xfrm_userpolicy_type upt;
1261 memset(&upt, 0, sizeof(upt));
1264 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1273 static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
1279 static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1281 struct xfrm_dump_info *sp = ptr;
1282 struct xfrm_userpolicy_info *p;
1283 struct sk_buff *in_skb = sp->in_skb;
1284 struct sk_buff *skb = sp->out_skb;
1285 struct nlmsghdr *nlh;
1286 unsigned char *b = skb_tail_pointer(skb);
1288 if (sp->this_idx < sp->start_idx)
1291 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid,
1293 XFRM_MSG_NEWPOLICY, sizeof(*p));
1294 p = NLMSG_DATA(nlh);
1295 nlh->nlmsg_flags = sp->nlmsg_flags;
1297 copy_to_user_policy(xp, p, dir);
1298 if (copy_to_user_tmpl(xp, skb) < 0)
1300 if (copy_to_user_sec_ctx(xp, skb))
1302 if (copy_to_user_policy_type(xp->type, skb) < 0)
1305 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1315 static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1317 struct xfrm_dump_info info;
1319 info.in_skb = cb->skb;
1321 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1322 info.nlmsg_flags = NLM_F_MULTI;
1324 info.start_idx = cb->args[0];
1325 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1326 #ifdef CONFIG_XFRM_SUB_POLICY
1327 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1329 cb->args[0] = info.this_idx;
1334 static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1335 struct xfrm_policy *xp,
1338 struct xfrm_dump_info info;
1339 struct sk_buff *skb;
1341 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1343 return ERR_PTR(-ENOMEM);
1345 info.in_skb = in_skb;
1347 info.nlmsg_seq = seq;
1348 info.nlmsg_flags = 0;
1349 info.this_idx = info.start_idx = 0;
1351 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1359 static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1360 struct rtattr **xfrma)
1362 struct xfrm_policy *xp;
1363 struct xfrm_userpolicy_id *p;
1364 u8 type = XFRM_POLICY_TYPE_MAIN;
1369 p = NLMSG_DATA(nlh);
1370 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1372 err = copy_from_user_policy_type(&type, xfrma);
1376 err = verify_policy_dir(p->dir);
1381 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
1383 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1384 struct xfrm_policy tmp;
1386 err = verify_sec_ctx_len(xfrma);
1390 memset(&tmp, 0, sizeof(struct xfrm_policy));
1392 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1394 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1397 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1399 security_xfrm_policy_free(&tmp);
1405 struct sk_buff *resp_skb;
1407 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1408 if (IS_ERR(resp_skb)) {
1409 err = PTR_ERR(resp_skb);
1411 err = netlink_unicast(xfrm_nl, resp_skb,
1412 NETLINK_CB(skb).pid,
1416 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1417 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1422 c.data.byid = p->index;
1423 c.event = nlh->nlmsg_type;
1424 c.seq = nlh->nlmsg_seq;
1425 c.pid = nlh->nlmsg_pid;
1426 km_policy_notify(xp, p->dir, &c);
1434 static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1435 struct rtattr **xfrma)
1438 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
1439 struct xfrm_audit audit_info;
1441 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1442 audit_info.secid = NETLINK_CB(skb).sid;
1443 xfrm_state_flush(p->proto, &audit_info);
1444 c.data.proto = p->proto;
1445 c.event = nlh->nlmsg_type;
1446 c.seq = nlh->nlmsg_seq;
1447 c.pid = nlh->nlmsg_pid;
1448 km_state_notify(NULL, &c);
1454 static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1456 struct xfrm_aevent_id *id;
1457 struct nlmsghdr *nlh;
1458 struct xfrm_lifetime_cur ltime;
1459 unsigned char *b = skb_tail_pointer(skb);
1461 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id));
1462 id = NLMSG_DATA(nlh);
1463 nlh->nlmsg_flags = 0;
1465 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
1466 id->sa_id.spi = x->id.spi;
1467 id->sa_id.family = x->props.family;
1468 id->sa_id.proto = x->id.proto;
1469 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1470 id->reqid = x->props.reqid;
1471 id->flags = c->data.aevent;
1473 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1475 ltime.bytes = x->curlft.bytes;
1476 ltime.packets = x->curlft.packets;
1477 ltime.add_time = x->curlft.add_time;
1478 ltime.use_time = x->curlft.use_time;
1480 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime);
1482 if (id->flags&XFRM_AE_RTHR) {
1483 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1486 if (id->flags&XFRM_AE_ETHR) {
1487 u32 etimer = x->replay_maxage*10/HZ;
1488 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1491 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1500 static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1501 struct rtattr **xfrma)
1503 struct xfrm_state *x;
1504 struct sk_buff *r_skb;
1507 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1508 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1509 struct xfrm_usersa_id *id = &p->sa_id;
1511 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1512 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1514 if (p->flags&XFRM_AE_RTHR)
1515 len+=RTA_SPACE(sizeof(u32));
1517 if (p->flags&XFRM_AE_ETHR)
1518 len+=RTA_SPACE(sizeof(u32));
1520 r_skb = alloc_skb(len, GFP_ATOMIC);
1524 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1531 * XXX: is this lock really needed - none of the other
1532 * gets lock (the concern is things getting updated
1533 * while we are still reading) - jhs
1535 spin_lock_bh(&x->lock);
1536 c.data.aevent = p->flags;
1537 c.seq = nlh->nlmsg_seq;
1538 c.pid = nlh->nlmsg_pid;
1540 if (build_aevent(r_skb, x, &c) < 0)
1542 err = netlink_unicast(xfrm_nl, r_skb,
1543 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1544 spin_unlock_bh(&x->lock);
1549 static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1550 struct rtattr **xfrma)
1552 struct xfrm_state *x;
1555 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1556 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1557 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1562 /* pedantic mode - thou shalt sayeth replaceth */
1563 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1566 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1570 if (x->km.state != XFRM_STATE_VALID)
1573 spin_lock_bh(&x->lock);
1574 err = xfrm_update_ae_params(x, xfrma);
1575 spin_unlock_bh(&x->lock);
1579 c.event = nlh->nlmsg_type;
1580 c.seq = nlh->nlmsg_seq;
1581 c.pid = nlh->nlmsg_pid;
1582 c.data.aevent = XFRM_AE_CU;
1583 km_state_notify(x, &c);
1590 static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1591 struct rtattr **xfrma)
1594 u8 type = XFRM_POLICY_TYPE_MAIN;
1596 struct xfrm_audit audit_info;
1598 err = copy_from_user_policy_type(&type, xfrma);
1602 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1603 audit_info.secid = NETLINK_CB(skb).sid;
1604 xfrm_policy_flush(type, &audit_info);
1606 c.event = nlh->nlmsg_type;
1607 c.seq = nlh->nlmsg_seq;
1608 c.pid = nlh->nlmsg_pid;
1609 km_policy_notify(NULL, 0, &c);
1613 static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1614 struct rtattr **xfrma)
1616 struct xfrm_policy *xp;
1617 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1618 struct xfrm_userpolicy_info *p = &up->pol;
1619 u8 type = XFRM_POLICY_TYPE_MAIN;
1622 err = copy_from_user_policy_type(&type, xfrma);
1627 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
1629 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
1630 struct xfrm_policy tmp;
1632 err = verify_sec_ctx_len(xfrma);
1636 memset(&tmp, 0, sizeof(struct xfrm_policy));
1638 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1640 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1643 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1645 security_xfrm_policy_free(&tmp);
1650 read_lock(&xp->lock);
1652 read_unlock(&xp->lock);
1656 read_unlock(&xp->lock);
1659 xfrm_policy_delete(xp, p->dir);
1660 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1661 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1664 // reset the timers here?
1665 printk("Dont know what to do with soft policy expire\n");
1667 km_policy_expired(xp, p->dir, up->hard, current->pid);
1674 static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1675 struct rtattr **xfrma)
1677 struct xfrm_state *x;
1679 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1680 struct xfrm_usersa_info *p = &ue->state;
1682 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
1688 spin_lock_bh(&x->lock);
1690 if (x->km.state != XFRM_STATE_VALID)
1692 km_state_expired(x, ue->hard, current->pid);
1695 __xfrm_state_delete(x);
1696 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1697 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1701 spin_unlock_bh(&x->lock);
1706 static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1707 struct rtattr **xfrma)
1709 struct xfrm_policy *xp;
1710 struct xfrm_user_tmpl *ut;
1712 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1714 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1715 struct xfrm_state *x = xfrm_state_alloc();
1721 err = verify_newpolicy_info(&ua->policy);
1723 printk("BAD policy passed\n");
1729 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1735 memcpy(&x->id, &ua->id, sizeof(ua->id));
1736 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1737 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1740 /* extract the templates and for each call km_key */
1741 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1742 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1743 memcpy(&x->id, &t->id, sizeof(x->id));
1744 x->props.mode = t->mode;
1745 x->props.reqid = t->reqid;
1746 x->props.family = ut->family;
1747 t->aalgos = ua->aalgos;
1748 t->ealgos = ua->ealgos;
1749 t->calgos = ua->calgos;
1750 err = km_query(x, t, xp);
1760 #ifdef CONFIG_XFRM_MIGRATE
1761 static int verify_user_migrate(struct rtattr **xfrma)
1763 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1764 struct xfrm_user_migrate *um;
1769 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1775 static int copy_from_user_migrate(struct xfrm_migrate *ma,
1776 struct rtattr **xfrma, int *num)
1778 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1779 struct xfrm_user_migrate *um;
1783 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1785 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1788 for (i = 0; i < num_migrate; i++, um++, ma++) {
1789 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1790 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1791 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1792 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1794 ma->proto = um->proto;
1795 ma->mode = um->mode;
1796 ma->reqid = um->reqid;
1798 ma->old_family = um->old_family;
1799 ma->new_family = um->new_family;
1806 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1807 struct rtattr **xfrma)
1809 struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
1810 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1815 err = verify_user_migrate((struct rtattr **)xfrma);
1819 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1823 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1824 (struct rtattr **)xfrma, &n);
1831 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1836 static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1837 struct rtattr **xfrma)
1839 return -ENOPROTOOPT;
1843 #ifdef CONFIG_XFRM_MIGRATE
1844 static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1846 struct xfrm_user_migrate um;
1848 memset(&um, 0, sizeof(um));
1849 um.proto = m->proto;
1851 um.reqid = m->reqid;
1852 um.old_family = m->old_family;
1853 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1854 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1855 um.new_family = m->new_family;
1856 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1857 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1859 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1866 static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1867 int num_migrate, struct xfrm_selector *sel,
1870 struct xfrm_migrate *mp;
1871 struct xfrm_userpolicy_id *pol_id;
1872 struct nlmsghdr *nlh;
1873 unsigned char *b = skb_tail_pointer(skb);
1876 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id));
1877 pol_id = NLMSG_DATA(nlh);
1878 nlh->nlmsg_flags = 0;
1880 /* copy data from selector, dir, and type to the pol_id */
1881 memset(pol_id, 0, sizeof(*pol_id));
1882 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1885 if (copy_to_user_policy_type(type, skb) < 0)
1888 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1889 if (copy_to_user_migrate(mp, skb) < 0)
1893 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
1900 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1901 struct xfrm_migrate *m, int num_migrate)
1903 struct sk_buff *skb;
1906 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1907 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1908 #ifdef CONFIG_XFRM_SUB_POLICY
1909 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1911 skb = alloc_skb(len, GFP_ATOMIC);
1916 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1919 NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
1920 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
1924 static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1925 struct xfrm_migrate *m, int num_migrate)
1927 return -ENOPROTOOPT;
1931 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1933 static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1934 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1935 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1936 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1937 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1938 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1939 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1940 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
1941 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
1942 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
1943 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1944 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1945 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
1946 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1947 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
1948 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1949 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1950 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
1951 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1952 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1953 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1958 static struct xfrm_link {
1959 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1960 int (*dump)(struct sk_buff *, struct netlink_callback *);
1961 } xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1962 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1963 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1964 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1965 .dump = xfrm_dump_sa },
1966 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1967 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1968 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1969 .dump = xfrm_dump_policy },
1970 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
1971 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
1972 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
1973 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1974 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1975 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
1976 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1977 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
1978 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1979 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
1980 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
1981 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
1982 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1985 static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1987 struct rtattr *xfrma[XFRMA_MAX];
1988 struct xfrm_link *link;
1991 type = nlh->nlmsg_type;
1992 if (type > XFRM_MSG_MAX)
1995 type -= XFRM_MSG_BASE;
1996 link = &xfrm_dispatch[type];
1998 /* All operations require privileges, even GET */
1999 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2002 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2003 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2004 (nlh->nlmsg_flags & NLM_F_DUMP)) {
2005 if (link->dump == NULL)
2008 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
2011 memset(xfrma, 0, sizeof(xfrma));
2013 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
2016 if (nlh->nlmsg_len > min_len) {
2017 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2018 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
2020 while (RTA_OK(attr, attrlen)) {
2021 unsigned short flavor = attr->rta_type;
2023 if (flavor > XFRMA_MAX)
2025 xfrma[flavor - 1] = attr;
2027 attr = RTA_NEXT(attr, attrlen);
2031 if (link->doit == NULL)
2034 return link->doit(skb, nlh, xfrma);
2037 static void xfrm_netlink_rcv(struct sock *sk, int len)
2039 unsigned int qlen = 0;
2042 mutex_lock(&xfrm_cfg_mutex);
2043 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
2044 mutex_unlock(&xfrm_cfg_mutex);
2049 static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
2051 struct xfrm_user_expire *ue;
2052 struct nlmsghdr *nlh;
2053 unsigned char *b = skb_tail_pointer(skb);
2055 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE,
2057 ue = NLMSG_DATA(nlh);
2058 nlh->nlmsg_flags = 0;
2060 copy_to_user_state(x, &ue->state);
2061 ue->hard = (c->data.hard != 0) ? 1 : 0;
2063 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2071 static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
2073 struct sk_buff *skb;
2074 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
2076 skb = alloc_skb(len, GFP_ATOMIC);
2080 if (build_expire(skb, x, c) < 0)
2083 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2084 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2087 static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2089 struct sk_buff *skb;
2090 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2092 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2093 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2094 skb = alloc_skb(len, GFP_ATOMIC);
2098 if (build_aevent(skb, x, c) < 0)
2101 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
2102 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2105 static int xfrm_notify_sa_flush(struct km_event *c)
2107 struct xfrm_usersa_flush *p;
2108 struct nlmsghdr *nlh;
2109 struct sk_buff *skb;
2111 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2113 skb = alloc_skb(len, GFP_ATOMIC);
2118 nlh = NLMSG_PUT(skb, c->pid, c->seq,
2119 XFRM_MSG_FLUSHSA, sizeof(*p));
2120 nlh->nlmsg_flags = 0;
2122 p = NLMSG_DATA(nlh);
2123 p->proto = c->data.proto;
2125 nlh->nlmsg_len = skb->tail - b;
2127 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2128 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2135 static inline int xfrm_sa_len(struct xfrm_state *x)
2139 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2141 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2143 l += RTA_SPACE(sizeof(*x->calg));
2145 l += RTA_SPACE(sizeof(*x->encap));
2150 static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2152 struct xfrm_usersa_info *p;
2153 struct xfrm_usersa_id *id;
2154 struct nlmsghdr *nlh;
2155 struct sk_buff *skb;
2157 int len = xfrm_sa_len(x);
2160 headlen = sizeof(*p);
2161 if (c->event == XFRM_MSG_DELSA) {
2162 len += RTA_SPACE(headlen);
2163 headlen = sizeof(*id);
2165 len += NLMSG_SPACE(headlen);
2167 skb = alloc_skb(len, GFP_ATOMIC);
2172 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2173 nlh->nlmsg_flags = 0;
2175 p = NLMSG_DATA(nlh);
2176 if (c->event == XFRM_MSG_DELSA) {
2177 id = NLMSG_DATA(nlh);
2178 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2179 id->spi = x->id.spi;
2180 id->family = x->props.family;
2181 id->proto = x->id.proto;
2183 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2186 copy_to_user_state(x, p);
2189 RTA_PUT(skb, XFRMA_ALG_AUTH,
2190 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2192 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2193 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2195 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2198 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2200 nlh->nlmsg_len = skb->tail - b;
2202 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2203 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
2211 static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2215 case XFRM_MSG_EXPIRE:
2216 return xfrm_exp_state_notify(x, c);
2217 case XFRM_MSG_NEWAE:
2218 return xfrm_aevent_state_notify(x, c);
2219 case XFRM_MSG_DELSA:
2220 case XFRM_MSG_UPDSA:
2221 case XFRM_MSG_NEWSA:
2222 return xfrm_notify_sa(x, c);
2223 case XFRM_MSG_FLUSHSA:
2224 return xfrm_notify_sa_flush(c);
2226 printk("xfrm_user: Unknown SA event %d\n", c->event);
2234 static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2235 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2238 struct xfrm_user_acquire *ua;
2239 struct nlmsghdr *nlh;
2240 unsigned char *b = skb_tail_pointer(skb);
2241 __u32 seq = xfrm_get_acqseq();
2243 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE,
2245 ua = NLMSG_DATA(nlh);
2246 nlh->nlmsg_flags = 0;
2248 memcpy(&ua->id, &x->id, sizeof(ua->id));
2249 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2250 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2251 copy_to_user_policy(xp, &ua->policy, dir);
2252 ua->aalgos = xt->aalgos;
2253 ua->ealgos = xt->ealgos;
2254 ua->calgos = xt->calgos;
2255 ua->seq = x->km.seq = seq;
2257 if (copy_to_user_tmpl(xp, skb) < 0)
2259 if (copy_to_user_state_sec_ctx(x, skb))
2261 if (copy_to_user_policy_type(xp->type, skb) < 0)
2264 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2272 static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2273 struct xfrm_policy *xp, int dir)
2275 struct sk_buff *skb;
2278 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2279 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
2280 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
2281 #ifdef CONFIG_XFRM_SUB_POLICY
2282 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2284 skb = alloc_skb(len, GFP_ATOMIC);
2288 if (build_acquire(skb, x, xt, xp, dir) < 0)
2291 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2292 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
2295 /* User gives us xfrm_user_policy_info followed by an array of 0
2296 * or more templates.
2298 static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
2299 u8 *data, int len, int *dir)
2301 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2302 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2303 struct xfrm_policy *xp;
2306 switch (sk->sk_family) {
2308 if (opt != IP_XFRM_POLICY) {
2313 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2315 if (opt != IPV6_XFRM_POLICY) {
2328 if (len < sizeof(*p) ||
2329 verify_newpolicy_info(p))
2332 nr = ((len - sizeof(*p)) / sizeof(*ut));
2333 if (validate_tmpl(nr, ut, p->sel.family))
2336 if (p->dir > XFRM_POLICY_OUT)
2339 xp = xfrm_policy_alloc(GFP_KERNEL);
2345 copy_from_user_policy(xp, p);
2346 xp->type = XFRM_POLICY_TYPE_MAIN;
2347 copy_templates(xp, ut, nr);
2354 static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
2355 int dir, struct km_event *c)
2357 struct xfrm_user_polexpire *upe;
2358 struct nlmsghdr *nlh;
2359 int hard = c->data.hard;
2360 unsigned char *b = skb_tail_pointer(skb);
2362 nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe));
2363 upe = NLMSG_DATA(nlh);
2364 nlh->nlmsg_flags = 0;
2366 copy_to_user_policy(xp, &upe->pol, dir);
2367 if (copy_to_user_tmpl(xp, skb) < 0)
2369 if (copy_to_user_sec_ctx(xp, skb))
2371 if (copy_to_user_policy_type(xp->type, skb) < 0)
2375 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2383 static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2385 struct sk_buff *skb;
2388 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2389 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
2390 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
2391 #ifdef CONFIG_XFRM_SUB_POLICY
2392 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2394 skb = alloc_skb(len, GFP_ATOMIC);
2398 if (build_polexpire(skb, xp, dir, c) < 0)
2401 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2402 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
2405 static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2407 struct xfrm_userpolicy_info *p;
2408 struct xfrm_userpolicy_id *id;
2409 struct nlmsghdr *nlh;
2410 struct sk_buff *skb;
2412 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2415 headlen = sizeof(*p);
2416 if (c->event == XFRM_MSG_DELPOLICY) {
2417 len += RTA_SPACE(headlen);
2418 headlen = sizeof(*id);
2420 #ifdef CONFIG_XFRM_SUB_POLICY
2421 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2423 len += NLMSG_SPACE(headlen);
2425 skb = alloc_skb(len, GFP_ATOMIC);
2430 nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen);
2432 p = NLMSG_DATA(nlh);
2433 if (c->event == XFRM_MSG_DELPOLICY) {
2434 id = NLMSG_DATA(nlh);
2435 memset(id, 0, sizeof(*id));
2438 id->index = xp->index;
2440 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2442 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
2445 nlh->nlmsg_flags = 0;
2447 copy_to_user_policy(xp, p, dir);
2448 if (copy_to_user_tmpl(xp, skb) < 0)
2450 if (copy_to_user_policy_type(xp->type, skb) < 0)
2453 nlh->nlmsg_len = skb->tail - b;
2455 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2456 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2464 static int xfrm_notify_policy_flush(struct km_event *c)
2466 struct nlmsghdr *nlh;
2467 struct sk_buff *skb;
2470 #ifdef CONFIG_XFRM_SUB_POLICY
2471 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2473 len += NLMSG_LENGTH(0);
2475 skb = alloc_skb(len, GFP_ATOMIC);
2481 nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0);
2482 nlh->nlmsg_flags = 0;
2483 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2486 nlh->nlmsg_len = skb->tail - b;
2488 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2489 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
2496 static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2500 case XFRM_MSG_NEWPOLICY:
2501 case XFRM_MSG_UPDPOLICY:
2502 case XFRM_MSG_DELPOLICY:
2503 return xfrm_notify_policy(xp, dir, c);
2504 case XFRM_MSG_FLUSHPOLICY:
2505 return xfrm_notify_policy_flush(c);
2506 case XFRM_MSG_POLEXPIRE:
2507 return xfrm_exp_policy_notify(xp, dir, c);
2509 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2516 static int build_report(struct sk_buff *skb, u8 proto,
2517 struct xfrm_selector *sel, xfrm_address_t *addr)
2519 struct xfrm_user_report *ur;
2520 struct nlmsghdr *nlh;
2521 unsigned char *b = skb_tail_pointer(skb);
2523 nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
2524 ur = NLMSG_DATA(nlh);
2525 nlh->nlmsg_flags = 0;
2528 memcpy(&ur->sel, sel, sizeof(ur->sel));
2531 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2533 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
2542 static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2543 xfrm_address_t *addr)
2545 struct sk_buff *skb;
2548 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2549 skb = alloc_skb(len, GFP_ATOMIC);
2553 if (build_report(skb, proto, sel, addr) < 0)
2556 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2557 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2560 static struct xfrm_mgr netlink_mgr = {
2562 .notify = xfrm_send_state_notify,
2563 .acquire = xfrm_send_acquire,
2564 .compile_policy = xfrm_compile_policy,
2565 .notify_policy = xfrm_send_policy_notify,
2566 .report = xfrm_send_report,
2567 .migrate = xfrm_send_migrate,
2570 static int __init xfrm_user_init(void)
2574 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2576 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
2577 xfrm_netlink_rcv, NULL, THIS_MODULE);
2580 rcu_assign_pointer(xfrm_nl, nlsk);
2582 xfrm_register_km(&netlink_mgr);
2587 static void __exit xfrm_user_exit(void)
2589 struct sock *nlsk = xfrm_nl;
2591 xfrm_unregister_km(&netlink_mgr);
2592 rcu_assign_pointer(xfrm_nl, NULL);
2594 sock_release(nlsk->sk_socket);
2597 module_init(xfrm_user_init);
2598 module_exit(xfrm_user_exit);
2599 MODULE_LICENSE("GPL");
2600 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);