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50ba589c66
freebsd-skq/sys/netkey/key.c
shin 50ba589c66 IPSEC support in the kernel. 
pr_input() routines prototype is also changed to support IPSEC and IPV6
chained protocol headers.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
1999-12-22 19:13:38 +00:00

5317 lines
123 KiB
C
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/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/* KAME $Id: key.c,v 1.1.6.5.2.19 1999/07/22 14:09:24 itojun Exp $ */
/*
* This code is referd to RFC 2367
*/
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ipsec.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <net/if.h>
#include <net/route.h>
#include <net/raw_cb.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_var.h>
#include <netinet/in_pcb.h>
#ifdef INET6
#include <netinet6/ip6.h>
#include <netinet6/in6_var.h>
#include <netinet6/in6_pcb.h>
#endif /* INET6 */
#include <net/pfkeyv2.h>
#include <netkey/key_var.h>
#include <netkey/keydb.h>
#include <netkey/key.h>
#include <netkey/keysock.h>
#ifdef IPSEC_DEBUG
#include <netkey/key_debug.h>
#else
#define KEYDEBUG(lev,arg)
#endif
#include <netinet6/ipsec.h>
#include <netinet6/ah.h>
#ifdef INET6
#include <netinet6/ipsec6.h>
#include <netinet6/ah6.h>
#endif
#ifdef IPSEC_ESP
#include <netinet6/esp.h>
#ifdef INET6
#include <netinet6/esp6.h>
#endif
#endif
MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
#if defined(IPSEC_DEBUG)
u_int32_t key_debug_level = 0;
#endif /* defined(IPSEC_DEBUG) */
static u_int key_spi_trycnt = 1000;
static u_int32_t key_spi_minval = 0x100;
static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
static u_int32_t acq_seq = 0;
static int key_tick_init_random = 0;
static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
/* registed list */
#ifndef IPSEC_NONBLOCK_ACQUIRE
static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
#endif
struct key_cb key_cb;
/* search order for SAs */
static u_int saorder_state_valid[] = {
SADB_SASTATE_MATURE, SADB_SASTATE_DYING
};
static u_int saorder_state_alive[] = {
/* except DEAD */
SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
};
static u_int saorder_state_any[] = {
SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
};
#if defined(IPSEC_DEBUG)
SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
&key_debug_level, 0, "");
#endif /* defined(IPSEC_DEBUG) */
/* max count of trial for the decision of spi value */
SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
&key_spi_trycnt, 0, "");
/* minimum spi value to allocate automatically. */
SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
&key_spi_minval, 0, "");
/* maximun spi value to allocate automatically. */
SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
&key_spi_maxval, 0, "");
/* interval to initialize randseed */
SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
&key_int_random, 0, "");
/* lifetime for larval SA */
SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
&key_larval_lifetime, 0, "");
/* counter for blocking to send SADB_ACQUIRE to IKEd */
SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
&key_blockacq_count, 0, "");
/* lifetime for blocking to send SADB_ACQUIRE to IKEd */
SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
&key_blockacq_lifetime, 0, "");
#define __LIST_FOREACH(elm, head, field) \
for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
#define __LIST_CHAINED(elm) \
(!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
#define KEY_CHKSASTATE(head, sav, name) { \
if ((head) != (sav)) { \
printf("%s: state mismatched (TREE=%d SA=%d)\n", \
(name), (head), (sav)); \
continue; \
} \
}
#define KEY_CHKSPDIR(head, sp, name) { \
if ((head) != (sp)) { \
printf("%s: direction mismatched (TREE=%d SP=%d), " \
"anyway continue.\n", \
(name), (head), (sp)); \
} \
}
#define KMALLOC(p, t, n) \
((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT))
#define KFREE(p) \
free((caddr_t)(p), M_SECA);
#define KEY_NEWBUF(dst, t, src, len) \
((dst) = (t)key_newbuf((src), (len)))
/*
* set parameters into secpolicyindex buffer.
* Must allocate secpolicyindex buffer passed to this function.
*/
#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) do { \
bzero((idx), sizeof(struct secpolicyindex)); \
(idx)->dir = (_dir); \
(idx)->prefs = (ps); \
(idx)->prefd = (pd); \
(idx)->ul_proto = (ulp); \
bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
} while (0)
/*
* set parameters into secasindex buffer.
* Must allocate secasindex buffer before calling this function.
*/
#define KEY_SETSECASIDX(p, m, s, d, idx) do { \
bzero((idx), sizeof(struct secasindex)); \
(idx)->proto = (p); \
(idx)->mode = (m); \
bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
} while (0)
/* key statistics */
struct _keystat {
u_long getspi_count; /* the avarage of count to try to get new SPI */
} keystat;
static struct secasvar *key_allocsa_policy __P((struct ipsecrequest *isr));
static void key_freesp_so __P((struct secpolicy **sp));
static struct secasvar *key_do_allocsa_policy __P((struct secashead *sah,
u_int state));
static void key_delsp __P((struct secpolicy *sp));
static struct secpolicy *key_getsp __P((struct secpolicyindex *spidx));
static struct sadb_msg *key_spdadd __P((caddr_t *mhp));
static struct sadb_msg *key_spddelete __P((caddr_t *mhp));
static struct sadb_msg *key_spdflush __P((caddr_t *mhp));
static int key_spddump __P((caddr_t *mhp, struct socket *so, int target));
static u_int key_setdumpsp __P((struct sadb_msg *newmsg, struct secpolicy *sp,
u_int8_t type, u_int32_t seq, u_int32_t pid));
static u_int key_getspmsglen __P((struct secpolicy *sp));
static u_int key_getspreqmsglen __P((struct secpolicy *sp));
static struct secashead *key_newsah __P((struct secasindex *saidx));
static void key_delsah __P((struct secashead *sah));
static struct secasvar *key_newsav __P((caddr_t *mhp, struct secashead *sah));
static void key_delsav __P((struct secasvar *sav));
static struct secashead *key_getsah __P((struct secasindex *saidx));
static struct secasvar *key_checkspidup __P((struct secasindex *saidx,
u_int32_t spi));
static struct secasvar *key_getsavbyspi __P((struct secashead *sah,
u_int32_t spi));
static int key_setsaval __P((struct secasvar *sav, caddr_t *mhp));
static u_int key_getmsglen __P((struct secasvar *sav));
static int key_mature __P((struct secasvar *sav));
static u_int key_setdumpsa __P((struct sadb_msg *newmsg, struct secasvar *sav,
u_int8_t type, u_int8_t satype,
u_int32_t seq, u_int32_t pid));
static caddr_t key_setsadbmsg __P((caddr_t buf, u_int8_t type, int tlen,
u_int8_t satype, u_int32_t seq, pid_t pid,
u_int8_t reserved1, u_int8_t reserved2));
static caddr_t key_setsadbsa __P((caddr_t buf, struct secasvar *sav));
static caddr_t key_setsadbaddr __P((caddr_t buf, u_int16_t exttype,
struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto));
static caddr_t key_setsadbident
__P((caddr_t buf, u_int16_t exttype, u_int16_t idtype,
caddr_t string, int stringlen, u_int64_t id));
static caddr_t key_setsadbext __P((caddr_t p, caddr_t ext));
static void *key_newbuf __P((void *src, u_int len));
#ifdef INET6
static int key_ismyaddr6 __P((caddr_t addr));
#endif
static int key_cmpsaidx_exactly
__P((struct secasindex *saidx0, struct secasindex *saidx1));
static int key_cmpsaidx_withmode
__P((struct secasindex *saidx0, struct secasindex *saidx1));
static int key_cmpspidx_exactly
__P((struct secpolicyindex *spidx0, struct secpolicyindex *spidx1));
static int key_cmpspidx_withmask
__P((struct secpolicyindex *spidx0, struct secpolicyindex *spidx1));
static int key_bbcmp __P((caddr_t p1, caddr_t p2, u_int bits));
static u_int16_t key_satype2proto __P((u_int8_t satype));
static u_int8_t key_proto2satype __P((u_int16_t proto));
static struct sadb_msg *key_getspi __P((caddr_t *mhp));
static u_int32_t key_do_getnewspi __P((struct sadb_spirange *spirange,
struct secasindex *saidx));
static struct sadb_msg *key_update __P((caddr_t *mhp));
static struct secasvar *key_getsavbyseq __P((struct secashead *sah,
u_int32_t seq));
static struct sadb_msg *key_add __P((caddr_t *mhp));
static struct sadb_msg *key_getmsgbuf_x1 __P((caddr_t *mhp));
static struct sadb_msg *key_delete __P((caddr_t *mhp));
static struct sadb_msg *key_get __P((caddr_t *mhp));
static int key_acquire __P((struct secasindex *saidx,
struct secpolicyindex *spidx));
static struct secacq *key_newacq __P((struct secasindex *saidx));
static struct secacq *key_getacq __P((struct secasindex *saidx));
static struct secacq *key_getacqbyseq __P((u_int32_t seq));
static struct sadb_msg *key_acquire2 __P((caddr_t *mhp));
static struct sadb_msg *key_register __P((caddr_t *mhp, struct socket *so));
static int key_expire __P((struct secasvar *sav));
static struct sadb_msg *key_flush __P((caddr_t *mhp));
static int key_dump __P((caddr_t *mhp, struct socket *so, int target));
static void key_promisc __P((caddr_t *mhp, struct socket *so));
static int key_sendall __P((struct sadb_msg *msg, u_int len));
static int key_align __P((struct sadb_msg *msg, caddr_t *mhp));
static void key_sa_chgstate __P((struct secasvar *sav, u_int8_t state));
/* %%% IPsec policy management */
/*
* allocating a SP for OUTBOUND or INBOUND packet.
* Must call key_freesp() later.
* OUT: NULL: not found
* others: found and return the pointer.
*/
struct secpolicy *
key_allocsp(spidx, dir)
struct secpolicyindex *spidx;
u_int dir;
{
struct secpolicy *sp;
int s;
/* sanity check */
if (spidx == NULL)
panic("key_allocsp: NULL pointer is passed.\n");
/* check direction */
switch (dir) {
case IPSEC_DIR_INBOUND:
case IPSEC_DIR_OUTBOUND:
break;
default:
panic("key_allocsp: Invalid direction is passed.\n");
}
/* get a SP entry */
s = splnet(); /*called from softclock()*/
KEYDEBUG(KEYDEBUG_IPSEC_DATA,
printf("*** objects\n");
kdebug_secpolicyindex(spidx));
__LIST_FOREACH(sp, &sptree[dir], chain) {
KEYDEBUG(KEYDEBUG_IPSEC_DATA,
printf("*** in SPD\n");
kdebug_secpolicyindex(&sp->spidx));
if (sp->state == IPSEC_SPSTATE_DEAD)
continue;
if (key_cmpspidx_withmask(&sp->spidx, spidx))
goto found;
}
splx(s);
return NULL;
found:
/* sanity check */
KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
/* found a SPD entry */
sp->refcnt++;
splx(s);
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP key_allocsp cause refcnt++:%d SP:%p\n",
sp->refcnt, sp));
return sp;
}
/*
* checking each request entries in SP, and acquire SA if need.
* OUT: 0: there are valid requests.
* ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
*/
int
key_checkrequest(isr)
struct ipsecrequest *isr;
{
u_int level;
int error;
/* sanity check */
if (isr == NULL)
panic("key_checkrequest: NULL pointer is passed.\n");
/* check mode */
switch (isr->saidx.mode) {
case IPSEC_MODE_TRANSPORT:
case IPSEC_MODE_TUNNEL:
break;
case IPSEC_MODE_ANY:
default:
panic("key_checkrequest: Invalid policy defined.\n");
}
/* get current level */
level = ipsec_get_reqlevel(isr);
/*
* We don't allocate new SA if the state of SA in the holder is
* SADB_SASTATE_MATURE, and if this is newer one.
*/
if (isr->sav != NULL) {
/*
* XXX While SA is hanging on policy request(isr), its refcnt
* can not be zero. So isr->sav->sah is valid pointer if
* isr->sav != NULL. But that may not be true in fact.
* There may be missunderstanding by myself. Anyway I set
* zero to isr->sav->sah when isr->sav is flushed.
* I must check to have conviction this issue.
*/
if (isr->sav->sah != NULL
&& isr->sav != (struct secasvar *)LIST_FIRST(
&isr->sav->sah->savtree[SADB_SASTATE_MATURE])) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP checkrequest calls free SA:%p\n",
isr->sav));
key_freesav(isr->sav);
}
isr->sav = NULL;
}
/* new SA allocation if no SA found. */
if (isr->sav == NULL)
isr->sav = key_allocsa_policy(isr);
/* When there is SA. */
if (isr->sav != NULL)
return 0;
/* there is no SA */
if ((error = key_acquire(&isr->saidx, &isr->sp->spidx)) != 0) {
/* XXX What I do ? */
printf("key_checkrequest: error %d returned "
"from key_acquire.\n", error);
return error;
}
return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
}
/*
* allocating a SA for policy entry from SAD.
* NOTE: searching SAD of aliving state.
* OUT: NULL: not found.
* others: found and return the pointer.
*/
static struct secasvar *
key_allocsa_policy(isr)
struct ipsecrequest *isr;
{
struct secashead *sah;
struct secasvar *sav;
u_int stateidx, state;
__LIST_FOREACH(sah, &sahtree, chain) {
if (sah->state == SADB_SASTATE_DEAD)
continue;
if (key_cmpsaidx_withmode(&sah->saidx, &isr->saidx))
goto found;
}
return NULL;
found:
/* search valid state */
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_valid);
stateidx++) {
state = saorder_state_valid[stateidx];
sav = key_do_allocsa_policy(sah, state);
if (sav != NULL)
return sav;
}
return NULL;
}
/*
* searching SAD with direction, protocol, mode and state.
* called by key_allocsa_policy().
* OUT:
* NULL : not found
* others : found, pointer to a SA.
*/
static struct secasvar *
key_do_allocsa_policy(sah, state)
struct secashead *sah;
u_int state;
{
struct secasvar *sav, *candidate;
/* initilize */
candidate = NULL;
__LIST_FOREACH(sav, &sah->savtree[state], chain) {
/* sanity check */
KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
/* initialize */
if (candidate == NULL) {
candidate = sav;
continue;
}
/* Which SA is the better ? */
/* sanity check 2 */
if (candidate->lft_c == NULL || sav->lft_c == NULL) {
/*XXX do panic ? */
printf("key_do_allocsa_policy: "
"lifetime_current is NULL.\n");
continue;
}
/* XXX What the best method is to compare ? */
if (candidate->lft_c->sadb_lifetime_addtime <
sav->lft_c->sadb_lifetime_addtime) {
candidate = sav;
continue;
}
}
if (candidate) {
candidate->refcnt++;
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP allocsa_policy cause "
"refcnt++:%d SA:%p\n",
candidate->refcnt, candidate));
}
return candidate;
}
/*
* allocating a SA entry for a *INBOUND* packet.
* Must call key_freesav() later.
* OUT: positive: pointer to a sav.
* NULL: not found, or error occured.
*/
struct secasvar *
key_allocsa(family, src, dst, proto, spi)
u_int family, proto;
caddr_t src, dst;
u_int32_t spi;
{
struct secashead *sah;
struct secasvar *sav;
u_int stateidx, state;
int s;
/* sanity check */
if (src == NULL || dst == NULL)
panic("key_allocsa: NULL pointer is passed.\n");
/*
* searching SAD.
* XXX: to be checked internal IP header somewhere. Also when
* IPsec tunnel packet is received. But ESP tunnel mode is
* encrypted so we can't check internal IP header.
*/
s = splnet(); /*called from softclock()*/
__LIST_FOREACH(sah, &sahtree, chain) {
/* search valid state */
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_valid);
stateidx++) {
state = saorder_state_valid[stateidx];
__LIST_FOREACH(sav, &sah->savtree[state], chain) {
/* sanity check */
KEY_CHKSASTATE(sav->state, state, "key_allocsav");
if (proto != sav->sah->saidx.proto)
continue;
if (spi != sav->spi)
continue;
if (key_bbcmp(src,
_INADDRBYSA(&sav->sah->saidx.src),
_INALENBYAF(sav->sah->saidx.src.__ss_family) << 3)
&& key_bbcmp(dst,
_INADDRBYSA(&sav->sah->saidx.dst),
_INALENBYAF(sav->sah->saidx.dst.__ss_family) << 3))
goto found;
}
}
}
/* not found */
splx(s);
return NULL;
found:
sav->refcnt++;
splx(s);
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP allocsa cause refcnt++:%d SA:%p\n",
sav->refcnt, sav));
return sav;
}
/*
* Must be called after calling key_allocsp().
* For both the packet without socket and key_freeso().
*/
void
key_freesp(sp)
struct secpolicy *sp;
{
/* sanity check */
if (sp == NULL)
panic("key_freesp: NULL pointer is passed.\n");
sp->refcnt--;
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP freesp cause refcnt--:%d SP:%p\n",
sp->refcnt, sp));
if (sp->refcnt == 0)
key_delsp(sp);
return;
}
/*
* Must be called after calling key_allocsp().
* For the packet with socket.
*/
void
key_freeso(so)
struct socket *so;
{
/* sanity check */
if (so == NULL)
panic("key_freeso: NULL pointer is passed.\n");
switch (so->so_proto->pr_domain->dom_family) {
#ifdef INET
case PF_INET:
{
struct inpcb *pcb = sotoinpcb(so);
/* Does it have a PCB ? */
if (pcb == NULL)
return;
key_freesp_so(&pcb->inp_sp->sp_in);
key_freesp_so(&pcb->inp_sp->sp_out);
}
break;
#endif
#ifdef INET6
case PF_INET6:
{
struct in6pcb *pcb = sotoin6pcb(so);
/* Does it have a PCB ? */
if (pcb == NULL)
return;
key_freesp_so(&pcb->in6p_sp->sp_in);
key_freesp_so(&pcb->in6p_sp->sp_out);
}
break;
#endif /* INET6 */
default:
printf("key_freeso: unknown address family=%d.\n",
so->so_proto->pr_domain->dom_family);
return;
}
return;
}
static void
key_freesp_so(sp)
struct secpolicy **sp;
{
/* sanity check */
if (sp == NULL || *sp == NULL)
panic("key_freesp_so: sp == NULL\n");
switch ((*sp)->policy) {
case IPSEC_POLICY_IPSEC:
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP freeso calls free SP:%p\n", *sp));
key_freesp(*sp);
*sp = NULL;
break;
case IPSEC_POLICY_ENTRUST:
case IPSEC_POLICY_BYPASS:
return;
default:
panic("key_freesp_so: Invalid policy found %d", (*sp)->policy);
}
return;
}
/*
* Must be called after calling key_allocsa().
* This function is called by key_freesp() to free some SA allocated
* for a policy.
*/
void
key_freesav(sav)
struct secasvar *sav;
{
/* sanity check */
if (sav == NULL)
panic("key_freesav: NULL pointer is passed.\n");
sav->refcnt--;
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP freesav cause refcnt--:%d SA:%p SPI %d\n",
sav->refcnt, sav, (u_int32_t)ntohl(sav->spi)));
if (sav->refcnt == 0)
key_delsav(sav);
return;
}
/* %%% SPD management */
/*
* free security policy entry.
*/
static void
key_delsp(sp)
struct secpolicy *sp;
{
int s;
/* sanity check */
if (sp == NULL)
panic("key_delsp: NULL pointer is passed.\n");
sp->state = IPSEC_SPSTATE_DEAD;
if (sp->refcnt > 0)
return; /* can't free */
s = splnet(); /*called from softclock()*/
/* remove from SP index */
if (__LIST_CHAINED(sp))
LIST_REMOVE(sp, chain);
{
struct ipsecrequest *isr = sp->req, *nextisr;
while (isr != NULL) {
if (isr->sav != NULL) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP delsp calls free SA:%p\n",
isr->sav));
key_freesav(isr->sav);
isr->sav = NULL;
}
nextisr = isr->next;
KFREE(isr);
isr = nextisr;
}
}
KFREE(sp);
splx(s);
return;
}
/*
* search SPD
* OUT: NULL : not found
* others : found, pointer to a SP.
*/
static struct secpolicy *
key_getsp(spidx)
struct secpolicyindex *spidx;
{
struct secpolicy *sp;
/* sanity check */
if (spidx == NULL)
panic("key_getsp: NULL pointer is passed.\n");
__LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
if (sp->state == IPSEC_SPSTATE_DEAD)
continue;
if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
sp->refcnt++;
return sp;
}
}
return NULL;
}
struct secpolicy *
key_newsp()
{
struct secpolicy *newsp = NULL;
KMALLOC(newsp, struct secpolicy *, sizeof(*newsp));
if (newsp == NULL) {
printf("key_newsp: No more memory.\n");
return NULL;
}
bzero(newsp, sizeof(*newsp));
newsp->refcnt = 1;
newsp->req = NULL;
return newsp;
}
/*
* create secpolicy structure from sadb_x_policy structure.
* NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
* so must be set properly later.
*/
struct secpolicy *
key_msg2sp(xpl0)
struct sadb_x_policy *xpl0;
{
struct secpolicy *newsp;
/* sanity check */
if (xpl0 == NULL)
panic("key_msg2sp: NULL pointer was passed.\n");
if ((newsp = key_newsp()) == NULL)
return NULL;
newsp->spidx.dir = xpl0->sadb_x_policy_dir;
newsp->policy = xpl0->sadb_x_policy_type;
/* check policy */
switch (xpl0->sadb_x_policy_type) {
case IPSEC_POLICY_DISCARD:
case IPSEC_POLICY_NONE:
case IPSEC_POLICY_ENTRUST:
case IPSEC_POLICY_BYPASS:
newsp->req = NULL;
break;
case IPSEC_POLICY_IPSEC:
{
int tlen;
struct sadb_x_ipsecrequest *xisr;
struct ipsecrequest **p_isr = &newsp->req;
/* validity check */
if (PFKEY_EXTLEN(xpl0) <= sizeof(*xpl0)) {
printf("key_msg2sp: Invalid msg length.\n");
key_freesp(newsp);
return NULL;
}
tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
while (tlen > 0) {
/* length check */
if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
printf("key_msg2sp: "
"invalid ipsecrequest length.\n");
key_freesp(newsp);
return NULL;
}
/* allocate request buffer */
KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
if ((*p_isr) == NULL) {
printf("key_msg2sp: No more memory.\n");
key_freesp(newsp);
return NULL;
}
bzero(*p_isr, sizeof(**p_isr));
/* set values */
(*p_isr)->next = NULL;
switch (xisr->sadb_x_ipsecrequest_proto) {
case IPPROTO_ESP:
case IPPROTO_AH:
break;
default:
printf("key_msg2sp: invalid proto type=%u\n",
xisr->sadb_x_ipsecrequest_proto);
key_freesp(newsp);
return NULL;
}
(*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
switch (xisr->sadb_x_ipsecrequest_mode) {
case IPSEC_MODE_TRANSPORT:
case IPSEC_MODE_TUNNEL:
break;
case IPSEC_MODE_ANY:
default:
printf("key_msg2sp: invalid mode=%u\n",
xisr->sadb_x_ipsecrequest_mode);
key_freesp(newsp);
return NULL;
}
(*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
switch (xisr->sadb_x_ipsecrequest_level) {
case IPSEC_LEVEL_DEFAULT:
case IPSEC_LEVEL_USE:
case IPSEC_LEVEL_REQUIRE:
break;
default:
printf("key_msg2sp: invalid level=%u\n",
xisr->sadb_x_ipsecrequest_level);
key_freesp(newsp);
return NULL;
}
(*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
/* set IP addresses if there */
if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
struct sockaddr *paddr;
paddr = (struct sockaddr *)(xisr + 1);
/* validity check */
if (paddr->sa_len
> sizeof((*p_isr)->saidx.src)) {
printf("key_msg2sp: invalid request "
"address length.\n");
key_freesp(newsp);
return NULL;
}
bcopy(paddr, &(*p_isr)->saidx.src,
paddr->sa_len);
paddr = (struct sockaddr *)((caddr_t)paddr
+ paddr->sa_len);
/* validity check */
if (paddr->sa_len
> sizeof((*p_isr)->saidx.dst)) {
printf("key_msg2sp: invalid request "
"address length.\n");
key_freesp(newsp);
return NULL;
}
bcopy(paddr, &(*p_isr)->saidx.dst,
paddr->sa_len);
}
(*p_isr)->sav = NULL;
(*p_isr)->sp = newsp;
/* initialization for the next. */
p_isr = &(*p_isr)->next;
tlen -= xisr->sadb_x_ipsecrequest_len;
/* validity check */
if (tlen < 0) {
printf("key_msg2sp: becoming tlen < 0.\n");
key_freesp(newsp);
return NULL;
}
xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
+ xisr->sadb_x_ipsecrequest_len);
}
}
break;
default:
printf("key_msg2sp: invalid policy type.\n");
key_freesp(newsp);
return NULL;
}
return newsp;
}
/*
* copy secpolicy struct to sadb_x_policy structure indicated.
*/
struct sadb_x_policy *
key_sp2msg(sp)
struct secpolicy *sp;
{
struct sadb_x_policy *xpl;
int tlen;
caddr_t p;
/* sanity check. */
if (sp == NULL)
panic("key_sp2msg: NULL pointer was passed.\n");
tlen = key_getspreqmsglen(sp);
KMALLOC(xpl, struct sadb_x_policy *, tlen);
if (xpl == NULL) {
printf("key_sp2msg: No more memory.\n");
return NULL;
}
bzero(xpl, tlen);
xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
xpl->sadb_x_policy_type = sp->policy;
xpl->sadb_x_policy_dir = sp->spidx.dir;
p = (caddr_t)xpl + sizeof(*xpl);
/* if is the policy for ipsec ? */
if (sp->policy == IPSEC_POLICY_IPSEC) {
struct sadb_x_ipsecrequest *xisr;
struct ipsecrequest *isr;
for (isr = sp->req; isr != NULL; isr = isr->next) {
xisr = (struct sadb_x_ipsecrequest *)p;
xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
xisr->sadb_x_ipsecrequest_level = isr->level;
p += sizeof(*xisr);
bcopy(&isr->saidx.src, p, isr->saidx.src.__ss_len);
p += isr->saidx.src.__ss_len;
bcopy(&isr->saidx.dst, p, isr->saidx.dst.__ss_len);
p += isr->saidx.src.__ss_len;
xisr->sadb_x_ipsecrequest_len =
PFKEY_ALIGN8(sizeof(*xisr)
+ isr->saidx.src.__ss_len
+ isr->saidx.dst.__ss_len);
}
}
return xpl;
}
/*
* SADB_SPDADD processing
* add a entry to SP database, when received
* <base, address(SD), policy>
* from the user(?).
* Adding to SP database,
* and send
* <base, address(SD), policy>
* to the socket which was send.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*
*/
static struct sadb_msg *
key_spdadd(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_address *src0, *dst0;
struct sadb_x_policy *xpl0;
struct secpolicyindex spidx;
struct secpolicy *newsp;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_spdadd: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
if (mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL
|| mhp[SADB_X_EXT_POLICY] == NULL) {
printf("key_spdadd: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
src0 = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC];
dst0 = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST];
xpl0 = (struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY];
/* make secindex */
KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
src0 + 1,
dst0 + 1,
src0->sadb_address_prefixlen,
dst0->sadb_address_prefixlen,
src0->sadb_address_proto,
&spidx);
/* checking the direciton. */
switch (xpl0->sadb_x_policy_dir) {
case IPSEC_DIR_INBOUND:
case IPSEC_DIR_OUTBOUND:
break;
default:
printf("key_spdadd: Invalid SP direction.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* Is there SP in SPD ? */
newsp = key_getsp(&spidx);
if (newsp != NULL) {
key_freesp(newsp);
printf("key_spdadd: a SP entry exists already.\n");
msg0->sadb_msg_errno = EEXIST;
return NULL;
}
/* check policy */
/* key_spdadd() accepts DISCARD, NONE and IPSEC. */
if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
|| xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
printf("key_spdadd: Invalid policy type.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* allocation new SP entry */
if ((newsp = key_msg2sp(xpl0)) == NULL) {
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
src0 + 1,
dst0 + 1,
src0->sadb_address_prefixlen,
dst0->sadb_address_prefixlen,
src0->sadb_address_proto,
&newsp->spidx);
newsp->refcnt = 1; /* do not reclaim until I say I do */
newsp->state = IPSEC_SPSTATE_ALIVE;
LIST_INSERT_HEAD(&sptree[newsp->spidx.dir], newsp, chain);
{
struct sadb_msg *newmsg;
u_int len;
caddr_t p;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ PFKEY_EXTLEN(mhp[SADB_X_EXT_POLICY])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_spdadd: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)msg0, (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
p = (caddr_t)newmsg + sizeof(*msg0);
p = key_setsadbext(p, mhp[SADB_X_EXT_POLICY]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]);
return newmsg;
}
}
/*
* SADB_SPDDELETE processing
* receive
* <base, address(SD), policy(*)>
* from the user(?), and set SADB_SASTATE_DEAD,
* and send,
* <base, address(SD), policy(*)>
* to the ikmpd.
* policy(*) including direction of policy.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: other if success, return pointer to the message to send.
* 0 if fail.
*/
static struct sadb_msg *
key_spddelete(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_address *src0, *dst0;
struct sadb_x_policy *xpl0;
struct secpolicyindex spidx;
struct secpolicy *sp;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_spddelete: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
if (mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL
|| mhp[SADB_X_EXT_POLICY] == NULL) {
printf("key_spddelete: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
xpl0 = (struct sadb_x_policy *)mhp[SADB_X_EXT_POLICY];
/* make secindex */
KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
src0 + 1,
dst0 + 1,
src0->sadb_address_prefixlen,
dst0->sadb_address_prefixlen,
src0->sadb_address_proto,
&spidx);
/* checking the direciton. */
switch (xpl0->sadb_x_policy_dir) {
case IPSEC_DIR_INBOUND:
case IPSEC_DIR_OUTBOUND:
break;
default:
printf("key_spddelete: Invalid SP direction.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* Is there SP in SPD ? */
if ((sp = key_getsp(&spidx)) == NULL) {
printf("key_spddelete: no SP found.\n");
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
sp->state = IPSEC_SPSTATE_DEAD;
key_freesp(sp);
{
struct sadb_msg *newmsg;
u_int len;
caddr_t p;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ PFKEY_EXTLEN(mhp[SADB_X_EXT_POLICY])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_spddelete: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
p = (caddr_t)newmsg + sizeof(*msg0);
p = key_setsadbext(p, mhp[SADB_X_EXT_POLICY]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]);
return newmsg;
}
}
/*
* SADB_SPDFLUSH processing
* receive
* <base>
* from the user, and free all entries in secpctree.
* and send,
* <base>
* to the user.
* NOTE: what to do is only marking SADB_SASTATE_DEAD.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: other if success, return pointer to the message to send.
* 0 if fail.
*/
static struct sadb_msg *
key_spdflush(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct secpolicy *sp;
u_int dir;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_spdflush: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
__LIST_FOREACH(sp, &sptree[dir], chain) {
sp->state = IPSEC_SPSTATE_DEAD;
}
}
{
struct sadb_msg *newmsg;
u_int len;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_spdflush: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
return(newmsg);
}
}
/*
* SADB_SPDDUMP processing
* receive
* <base>
* from the user, and dump all SP leaves
* and send,
* <base> .....
* to the ikmpd.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: other if success, return pointer to the message to send.
* 0 if fail.
*/
static int
key_spddump(mhp, so, target)
caddr_t *mhp;
struct socket *so;
int target;
{
struct sadb_msg *msg0;
struct secpolicy *sp;
int len, cnt, cnt_sanity;
struct sadb_msg *newmsg;
u_int dir;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_spddump: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* search SPD entry and get buffer size. */
cnt = cnt_sanity = 0;
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
__LIST_FOREACH(sp, &sptree[dir], chain) {
cnt++;
}
}
if (cnt == 0)
return ENOENT;
newmsg = NULL;
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
__LIST_FOREACH(sp, &sptree[dir], chain) {
len = key_getspmsglen(sp);
/* making buffer */
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_spddump: No more memory.\n");
return ENOBUFS;
}
bzero((caddr_t)newmsg, len);
--cnt;
(void)key_setdumpsp(newmsg, sp, SADB_X_SPDDUMP,
cnt, msg0->sadb_msg_pid);
key_sendup(so, newmsg, len, target);
KFREE(newmsg);
newmsg = NULL;
}
}
return 0;
}
static u_int
key_setdumpsp(newmsg, sp, type, seq, pid)
struct sadb_msg *newmsg;
struct secpolicy *sp;
u_int8_t type;
u_int32_t seq, pid;
{
u_int tlen;
caddr_t p;
tlen = key_getspmsglen(sp);
p = key_setsadbmsg((caddr_t)newmsg, type, tlen,
SADB_SATYPE_UNSPEC, seq, pid,
IPSEC_MODE_ANY, sp->refcnt);
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_SRC,
(struct sockaddr *)&sp->spidx.src,
sp->spidx.prefs,
sp->spidx.ul_proto);
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_DST,
(struct sockaddr *)&sp->spidx.dst,
sp->spidx.prefd,
sp->spidx.ul_proto);
{
struct sadb_x_policy *tmp;
if ((tmp = key_sp2msg(sp)) == NULL) {
printf("key_setdumpsp: No more memory.\n");
return ENOBUFS;
}
/* validity check */
if (key_getspreqmsglen(sp) != PFKEY_UNUNIT64(tmp->sadb_x_policy_len))
panic("key_setdumpsp: length mismatch."
"sp:%d msg:%d\n",
key_getspreqmsglen(sp),
PFKEY_UNUNIT64(tmp->sadb_x_policy_len));
bcopy(tmp, p, PFKEY_UNUNIT64(tmp->sadb_x_policy_len));
KFREE(tmp);
}
return tlen;
}
/* get sadb message length for a SP. */
static u_int
key_getspmsglen(sp)
struct secpolicy *sp;
{
u_int tlen;
/* sanity check */
if (sp == NULL)
panic("key_getspmsglen: NULL pointer is passed.\n");
tlen = (sizeof(struct sadb_msg)
+ sizeof(struct sadb_address)
+ PFKEY_ALIGN8(_SALENBYAF(sp->spidx.src.__ss_family))
+ sizeof(struct sadb_address)
+ PFKEY_ALIGN8(_SALENBYAF(sp->spidx.dst.__ss_family)));
tlen += key_getspreqmsglen(sp);
return tlen;
}
/*
* get PFKEY message length for security policy and request.
*/
static u_int
key_getspreqmsglen(sp)
struct secpolicy *sp;
{
u_int tlen;
tlen = sizeof(struct sadb_x_policy);
/* if is the policy for ipsec ? */
if (sp->policy != IPSEC_POLICY_IPSEC)
return tlen;
/* get length of ipsec requests */
{
struct ipsecrequest *isr;
int len;
for (isr = sp->req; isr != NULL; isr = isr->next) {
len = sizeof(struct sadb_x_ipsecrequest)
+ isr->saidx.src.__ss_len
+ isr->saidx.dst.__ss_len;
tlen += PFKEY_ALIGN8(len);
}
}
return tlen;
}
/* %%% SAD management */
/*
* allocating a memory for new SA head, and copy from the values of mhp.
* OUT: NULL : failure due to the lack of memory.
* others : pointer to new SA head.
*/
static struct secashead *
key_newsah(saidx)
struct secasindex *saidx;
{
struct secashead *newsah;
u_int stateidx;
/* sanity check */
if (saidx == NULL)
panic("key_newsaidx: NULL pointer is passed.\n");
KMALLOC(newsah, struct secashead *, sizeof(struct secashead));
if (newsah == NULL) {
return NULL;
}
bzero((caddr_t)newsah, sizeof(struct secashead));
bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_any);
stateidx++) {
LIST_INIT(&newsah->savtree[saorder_state_any[stateidx]]);
}
/* add to saidxtree */
newsah->state = SADB_SASTATE_MATURE;
LIST_INSERT_HEAD(&sahtree, newsah, chain);
return(newsah);
}
/*
* delete SA index and all SA registerd.
*/
static void
key_delsah(sah)
struct secashead *sah;
{
struct secasvar *sav, *nextsav;
u_int stateidx, state;
int s;
/* sanity check */
if (sah == NULL)
panic("key_delsah: NULL pointer is passed.\n");
s = splnet(); /*called from softclock()*/
/* remove from tree of SA index */
if (__LIST_CHAINED(sah))
LIST_REMOVE(sah, chain);
/* searching all SA registerd in the secindex. */
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_any);
stateidx++) {
state = saorder_state_any[stateidx];
for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
sav != NULL;
sav = nextsav) {
nextsav = LIST_NEXT(sav, chain);
/* sanity check */
KEY_CHKSASTATE(state, sav->state, "key_delsah");
/* remove back pointer */
sav->sah = NULL;
if (sav->refcnt < 0) {
printf("key_delsah: why refcnt < 0 ?, "
"sav->refcnt=%d\n",
sav->refcnt);
}
key_freesav(sav);
sav = NULL;
}
}
if (sah->sa_route.ro_rt) {
RTFREE(sah->sa_route.ro_rt);
sah->sa_route.ro_rt = (struct rtentry *)NULL;
}
KFREE(sah);
splx(s);
return;
}
/*
* allocating a new SA with LARVAL state. key_add() and key_getspi() call,
* and copy the values of mhp into new buffer.
* When SAD message type is GETSPI:
* to set sequence number from acq_seq++,
* to set zero to SPI.
* not to call key_setsava().
* OUT: NULL : fail
* others : pointer to new secasvar.
*/
static struct secasvar *
key_newsav(mhp, sah)
caddr_t *mhp;
struct secashead *sah;
{
struct secasvar *newsav;
struct sadb_msg *msg0;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL || sah == NULL)
panic("key_newsa: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
if (newsav == NULL) {
printf("key_newsa: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newsav, sizeof(struct secasvar));
switch (msg0->sadb_msg_type) {
case SADB_GETSPI:
newsav->spi = 0;
/* sync sequence number */
if (msg0->sadb_msg_seq == 0)
newsav->seq =
(acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
else
newsav->seq = msg0->sadb_msg_seq;
break;
case SADB_ADD:
/* sanity check */
if (mhp[SADB_EXT_SA] == NULL) {
KFREE(newsav);
printf("key_newsa: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
newsav->spi = ((struct sadb_sa *)mhp[SADB_EXT_SA])->sadb_sa_spi;
newsav->seq = msg0->sadb_msg_seq;
break;
default:
KFREE(newsav);
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* copy sav values */
if (msg0->sadb_msg_type != SADB_GETSPI && key_setsaval(newsav, mhp)) {
KFREE(newsav);
/* msg0->sadb_msg_errno is set at key_setsaval. */
return NULL;
}
/* reset tick */
newsav->tick = 0;
newsav->pid = msg0->sadb_msg_pid;
/* add to satree */
newsav->sah = sah;
newsav->refcnt = 1;
newsav->state = SADB_SASTATE_LARVAL;
LIST_INSERT_HEAD(&sah->savtree[SADB_SASTATE_LARVAL], newsav, chain);
return newsav;
}
/*
* free() SA variable entry.
*/
static void
key_delsav(sav)
struct secasvar *sav;
{
/* sanity check */
if (sav == NULL)
panic("key_delsav: NULL pointer is passed.\n");
if (sav->refcnt > 0) return; /* can't free */
/* remove from SA header */
if (__LIST_CHAINED(sav))
LIST_REMOVE(sav, chain);
if (sav->key_auth != NULL)
KFREE(sav->key_auth);
if (sav->key_enc != NULL)
KFREE(sav->key_enc);
if (sav->replay != NULL) {
if (sav->replay->bitmap != NULL)
KFREE(sav->replay->bitmap);
KFREE(sav->replay);
}
if (sav->lft_c != NULL)
KFREE(sav->lft_c);
if (sav->lft_h != NULL)
KFREE(sav->lft_h);
if (sav->lft_s != NULL)
KFREE(sav->lft_s);
if (sav->iv != NULL)
KFREE(sav->iv);
#if notyet
if (sav->misc1 != NULL)
KFREE(sav->misc1);
if (sav->misc2 != NULL)
KFREE(sav->misc2);
if (sav->misc3 != NULL)
KFREE(sav->misc3);
#endif
sav->sah = NULL;
/* XXX for making sure. See key_checkrequest(),
* Refcnt may be suspicious. */
KFREE(sav);
return;
}
/*
* search SAD.
* OUT:
* NULL : not found
* others : found, pointer to a SA.
*/
static struct secashead *
key_getsah(saidx)
struct secasindex *saidx;
{
struct secashead *sah;
__LIST_FOREACH(sah, &sahtree, chain) {
if (sah->state == SADB_SASTATE_DEAD)
continue;
if (key_cmpsaidx_exactly(&sah->saidx, saidx))
return(sah);
}
return NULL;
}
/*
* check not to be duplicated SPI.
* NOTE: this function is too slow due to searching all SAD.
* OUT:
* NULL : not found
* others : found, pointer to a SA.
*/
static struct secasvar *
key_checkspidup(saidx, spi)
struct secasindex *saidx;
u_int32_t spi;
{
struct secashead *sah;
struct secasvar *sav;
/* check address family */
if (saidx->src.__ss_family != saidx->src.__ss_family) {
printf("key_checkspidup: address family mismatched.\n");
return NULL;
}
/* check all SAD */
__LIST_FOREACH(sah, &sahtree, chain) {
if (!key_ismyaddr(sah->saidx.dst.__ss_family,
_INADDRBYSA(&sah->saidx.dst)))
continue;
sav = key_getsavbyspi(sah, spi);
if (sav != NULL)
return sav;
}
return NULL;
}
/*
* search SAD litmited alive SA, protocol, SPI.
* OUT:
* NULL : not found
* others : found, pointer to a SA.
*/
static struct secasvar *
key_getsavbyspi(sah, spi)
struct secashead *sah;
u_int32_t spi;
{
struct secasvar *sav;
u_int stateidx, state;
/* search all status */
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_alive);
stateidx++) {
state = saorder_state_alive[stateidx];
__LIST_FOREACH(sav, &sah->savtree[state], chain) {
/* sanity check */
if (sav->state != state) {
printf("key_getsavbyspi: "
"invalid sav->state "
"(queue: %d SA: %d)\n",
state, sav->state);
continue;
}
if (sav->spi == spi)
return sav;
}
}
return NULL;
}
/*
* copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
* You must update these if need.
* OUT: 0: success.
* 1: failure. set errno to (mhp[0])->sadb_msg_errno.
*/
static int
key_setsaval(sav, mhp)
struct secasvar *sav;
caddr_t *mhp;
{
struct sadb_msg *msg0;
int error = 0;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_setsaval: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* initialization */
sav->replay = NULL;
sav->key_auth = NULL;
sav->key_enc = NULL;
sav->iv = NULL;
sav->lft_c = NULL;
sav->lft_h = NULL;
sav->lft_s = NULL;
/* SA */
if (mhp[SADB_EXT_SA] != NULL) {
struct sadb_sa *sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA];
sav->alg_auth = sa0->sadb_sa_auth;
sav->alg_enc = sa0->sadb_sa_encrypt;
sav->flags = sa0->sadb_sa_flags;
/* replay window */
if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
KMALLOC(sav->replay, struct secreplay *,
sizeof(struct secreplay));
if (sav->replay == NULL) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
bzero(sav->replay, sizeof(struct secreplay));
if ((sav->replay->wsize = sa0->sadb_sa_replay) != 0) {
KMALLOC(sav->replay->bitmap, caddr_t,
sav->replay->wsize);
if (sav->replay->bitmap == NULL) {
printf("key_setsaval: "
"No more memory.\n");
error = ENOBUFS;
goto err;
}
bzero(sav->replay->bitmap, sa0->sadb_sa_replay);
}
}
}
/* Authentication keys */
if (mhp[SADB_EXT_KEY_AUTH] != NULL) {
struct sadb_key *key0;
u_int len;
key0 = (struct sadb_key *)mhp[SADB_EXT_KEY_AUTH];
len = PFKEY_UNUNIT64(key0->sadb_key_len);
error = 0;
if (len < sizeof(struct sadb_key))
error = EINVAL;
switch (msg0->sadb_msg_satype) {
case SADB_SATYPE_AH:
case SADB_SATYPE_ESP:
if (len == sizeof(struct sadb_key)
&& sav->alg_auth != SADB_AALG_NULL) {
error = EINVAL;
}
break;
case SADB_X_SATYPE_IPCOMP:
error = EINVAL;
break;
default:
error = EINVAL;
break;
}
if (error) {
printf("key_setsaval: invalid key_auth values.\n");
goto err;
}
KEY_NEWBUF(sav->key_auth, struct sadb_key *, key0, len);
if (sav->key_auth == NULL) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
/* make length shift up for kernel*/
sav->key_auth->sadb_key_len = len;
}
/* Encryption key */
if (mhp[SADB_EXT_KEY_ENCRYPT] != NULL) {
struct sadb_key *key0;
u_int len;
key0 = (struct sadb_key *)mhp[SADB_EXT_KEY_ENCRYPT];
len = PFKEY_UNUNIT64(key0->sadb_key_len);
error = 0;
if (len < sizeof(struct sadb_key))
error = EINVAL;
switch (msg0->sadb_msg_satype) {
case SADB_SATYPE_ESP:
if (len == sizeof(struct sadb_key)
&& sav->alg_enc != SADB_EALG_NULL) {
error = EINVAL;
}
break;
case SADB_SATYPE_AH:
error = EINVAL;
break;
case SADB_X_SATYPE_IPCOMP:
break;
default:
error = EINVAL;
break;
}
if (error) {
printf("key_setsatval: invalid key_enc value.\n");
goto err;
}
KEY_NEWBUF(sav->key_enc, struct sadb_key *, key0, len);
if (sav->key_enc == NULL) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
/* make length shift up for kernel*/
sav->key_enc->sadb_key_len = len;
}
/* set iv */
sav->ivlen = 0;
switch (msg0->sadb_msg_satype) {
case SADB_SATYPE_ESP:
#ifdef IPSEC_ESP
{
struct esp_algorithm *algo;
algo = &esp_algorithms[sav->alg_enc];
if (algo && algo->ivlen)
sav->ivlen = (*algo->ivlen)(sav);
KMALLOC(sav->iv, caddr_t, sav->ivlen);
if (sav->iv == 0) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
/* initialize ? */
break;
}
#else
break;
#endif
case SADB_SATYPE_AH:
break;
default:
printf("key_setsaval: invalid SA type.\n");
error = EINVAL;
goto err;
}
/* reset tick */
sav->tick = 0;
/* make lifetime for CURRENT */
{
struct timeval tv;
KMALLOC(sav->lft_c, struct sadb_lifetime *,
sizeof(struct sadb_lifetime));
if (sav->lft_c == NULL) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
microtime(&tv);
sav->lft_c->sadb_lifetime_len =
PFKEY_UNIT64(sizeof(struct sadb_lifetime));
sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
sav->lft_c->sadb_lifetime_allocations = 0;
sav->lft_c->sadb_lifetime_bytes = 0;
sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
sav->lft_c->sadb_lifetime_usetime = 0;
}
/* lifetimes for HARD and SOFT */
{
struct sadb_lifetime *lft0;
lft0 = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
if (lft0 != NULL) {
KEY_NEWBUF(sav->lft_h, struct sadb_lifetime *,
lft0, sizeof(*lft0));
if (sav->lft_h == NULL) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
/* to be initialize ? */
}
lft0 = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
if (lft0 != NULL) {
KEY_NEWBUF(sav->lft_s, struct sadb_lifetime *,
lft0, sizeof(*lft0));
if (sav->lft_s == NULL) {
printf("key_setsaval: No more memory.\n");
error = ENOBUFS;
goto err;
}
/* to be initialize ? */
}
}
msg0->sadb_msg_errno = 0;
return 0;
err:
/* initialization */
if (sav->replay != NULL) {
if (sav->replay->bitmap != NULL)
KFREE(sav->replay->bitmap);
KFREE(sav->replay);
}
if (sav->key_auth != NULL)
KFREE(sav->key_auth);
if (sav->key_enc != NULL)
KFREE(sav->key_enc);
if (sav->iv != NULL)
KFREE(sav->iv);
if (sav->lft_c != NULL)
KFREE(sav->lft_c);
if (sav->lft_h != NULL)
KFREE(sav->lft_h);
if (sav->lft_s != NULL)
KFREE(sav->lft_s);
msg0->sadb_msg_errno = error;
return 1;
}
/*
* get message buffer length.
*/
static u_int
key_getmsglen(sav)
struct secasvar *sav;
{
int len = sizeof(struct sadb_msg);
len += sizeof(struct sadb_sa);
len += (sizeof(struct sadb_address)
+ PFKEY_ALIGN8(_SALENBYAF(sav->sah->saidx.src.__ss_family)));
len += (sizeof(struct sadb_address)
+ PFKEY_ALIGN8(_SALENBYAF(sav->sah->saidx.dst.__ss_family)));
if (sav->key_auth != NULL)
len += sav->key_auth->sadb_key_len;
if (sav->key_enc != NULL)
len += sav->key_enc->sadb_key_len;
if (sav->lft_c != NULL)
len += sizeof(struct sadb_lifetime);
if (sav->lft_h != NULL)
len += sizeof(struct sadb_lifetime);
if (sav->lft_s != NULL)
len += sizeof(struct sadb_lifetime);
return len;
}
/*
* validation with a secasvar entry, and set SADB_SATYPE_MATURE.
* OUT: 0: valid
* other: errno
*/
static int
key_mature(sav)
struct secasvar *sav;
{
int mature;
int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
mature = 0;
/* check SPI value */
if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
printf("key_mature: illegal range of SPI %d.\n", sav->spi);
return EINVAL;
}
/* check satype */
switch (sav->sah->saidx.proto) {
case IPPROTO_ESP:
/* check flags */
if ((sav->flags & SADB_X_EXT_OLD)
&& (sav->flags & SADB_X_EXT_DERIV)) {
printf("key_mature: "
"invalid flag (derived) given to old-esp.\n");
return EINVAL;
}
checkmask = 3;
mustmask = 1;
break;
case IPPROTO_AH:
/* check flags */
if (sav->flags & SADB_X_EXT_DERIV) {
printf("key_mature: "
"invalid flag (derived) given to AH SA.\n");
return EINVAL;
}
if (sav->alg_enc != SADB_EALG_NONE) {
printf("key_mature: "
"protocol and algorithm mismated.\n");
return(EINVAL);
}
checkmask = 2;
mustmask = 2;
break;
default:
printf("key_mature: Invalid satype.\n");
return EPROTONOSUPPORT;
}
/* check authentication algorithm */
if ((checkmask & 2) != 0) {
struct ah_algorithm *algo;
int keylen;
/* XXX: should use algorithm map to check. */
switch (sav->alg_auth) {
case SADB_AALG_NONE:
case SADB_AALG_MD5HMAC:
case SADB_AALG_SHA1HMAC:
case SADB_AALG_MD5:
case SADB_AALG_SHA:
case SADB_AALG_NULL:
break;
default:
printf("key_mature: "
"unknown authentication algorithm.\n");
return EINVAL;
}
/* algorithm-dependent check */
algo = &ah_algorithms[sav->alg_auth];
if (sav->key_auth)
keylen = sav->key_auth->sadb_key_bits;
else
keylen = 0;
if (keylen < algo->keymin || algo->keymax < keylen) {
printf("key_mature: invalid AH key length %d "
"(%d-%d allowed)\n", keylen,
algo->keymin, algo->keymax);
return EINVAL;
}
if (algo->mature) {
if ((*algo->mature)(sav)) {
/* message generated in per-algorithm function*/
return EINVAL;
} else
mature = SADB_SATYPE_AH;
}
if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH)
return EINVAL;
}
/* check encryption algorithm */
if ((checkmask & 1) != 0) {
#ifdef IPSEC_ESP
struct esp_algorithm *algo;
int keylen;
switch (sav->alg_enc) {
case SADB_EALG_NONE:
case SADB_EALG_DESCBC:
case SADB_EALG_3DESCBC:
case SADB_EALG_NULL:
case SADB_EALG_BLOWFISHCBC:
case SADB_EALG_CAST128CBC:
case SADB_EALG_RC5CBC:
break;
default:
printf("key_mature: unknown encryption algorithm.\n");
return(EINVAL);
}
/* algorithm-dependent check */
algo = &esp_algorithms[sav->alg_enc];
if (sav->key_enc)
keylen = sav->key_enc->sadb_key_bits;
else
keylen = 0;
if (keylen < algo->keymin || algo->keymax < keylen) {
printf("key_mature: invalid ESP key length %d "
"(%d-%d allowed)\n", keylen,
algo->keymin, algo->keymax);
return EINVAL;
}
if (algo->mature) {
if ((*algo->mature)(sav)) {
/* message generated in per-algorithm function*/
return EINVAL;
} else
mature = SADB_SATYPE_ESP;
}
if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP)
return EINVAL;
#else
printf("key_mature: ESP not supported in this configuration\n");
return EINVAL;
#endif
}
key_sa_chgstate(sav, SADB_SASTATE_MATURE);
return 0;
}
/*
* subroutine for SADB_GET and SADB_DUMP.
* the buf must be allocated sufficent space.
*/
static u_int
key_setdumpsa(newmsg, sav, type, satype, seq, pid)
struct sadb_msg *newmsg;
struct secasvar *sav;
u_int8_t type, satype;
u_int32_t seq, pid;
{
u_int tlen;
caddr_t p;
int i;
tlen = key_getmsglen(sav);
p = key_setsadbmsg((caddr_t)newmsg, type, tlen,
satype, seq, pid,
sav->sah->saidx.mode, sav->refcnt);
for (i = 1; i <= SADB_EXT_MAX; i++) {
switch (i) {
case SADB_EXT_SA:
p = key_setsadbsa(p, sav);
break;
case SADB_EXT_ADDRESS_SRC:
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_SRC,
(struct sockaddr *)&sav->sah->saidx.src,
_INALENBYAF(sav->sah->saidx.src.__ss_family) << 3,
IPSEC_ULPROTO_ANY);
break;
case SADB_EXT_ADDRESS_DST:
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_DST,
(struct sockaddr *)&sav->sah->saidx.dst,
_INALENBYAF(sav->sah->saidx.dst.__ss_family) << 3,
IPSEC_ULPROTO_ANY);
break;
case SADB_EXT_KEY_AUTH:
{
u_int len;
if (sav->key_auth == NULL) break;
len = sav->key_auth->sadb_key_len; /* real length */
bcopy((caddr_t)sav->key_auth, p, len);
((struct sadb_ext *)p)->sadb_ext_len = PFKEY_UNIT64(len);
p += len;
}
break;
case SADB_EXT_KEY_ENCRYPT:
{
u_int len;
if (sav->key_enc == NULL) break;
len = sav->key_enc->sadb_key_len; /* real length */
bcopy((caddr_t)sav->key_enc, p, len);
((struct sadb_ext *)p)->sadb_ext_len = PFKEY_UNIT64(len);
p += len;
}
break;;
case SADB_EXT_LIFETIME_CURRENT:
if (sav->lft_c == NULL) break;
p = key_setsadbext(p, (caddr_t)sav->lft_c);
break;
case SADB_EXT_LIFETIME_HARD:
if (sav->lft_h == NULL) break;
p = key_setsadbext(p, (caddr_t)sav->lft_h);
break;
case SADB_EXT_LIFETIME_SOFT:
if (sav->lft_s == NULL) break;
p = key_setsadbext(p, (caddr_t)sav->lft_s);
break;
case SADB_EXT_IDENTITY_SRC:
case SADB_EXT_IDENTITY_DST:
/* XXX: should we brought from SPD ? */
case SADB_EXT_SENSITIVITY:
default:
break;
}
}
return tlen;
}
/*
* set data into sadb_msg.
* `buf' must has been allocated sufficiently.
*/
static caddr_t
key_setsadbmsg(buf, type, tlen, satype, seq, pid, reserved1, reserved2)
caddr_t buf;
u_int8_t type, satype;
u_int16_t tlen;
u_int32_t seq;
pid_t pid;
u_int8_t reserved1;
u_int8_t reserved2;
{
struct sadb_msg *p;
u_int len;
p = (struct sadb_msg *)buf;
len = sizeof(struct sadb_msg);
bzero(p, len);
p->sadb_msg_version = PF_KEY_V2;
p->sadb_msg_type = type;
p->sadb_msg_errno = 0;
p->sadb_msg_satype = satype;
p->sadb_msg_len = PFKEY_UNIT64(tlen);
p->sadb_msg_mode = reserved1;
p->sadb_msg_reserved = reserved2;
p->sadb_msg_seq = seq;
p->sadb_msg_pid = (u_int32_t)pid;
return(buf + len);
}
/*
* copy secasvar data into sadb_address.
* `buf' must has been allocated sufficiently.
*/
static caddr_t
key_setsadbsa(buf, sav)
caddr_t buf;
struct secasvar *sav;
{
struct sadb_sa *p;
u_int len;
p = (struct sadb_sa *)buf;
len = sizeof(struct sadb_sa);
bzero(p, len);
p->sadb_sa_len = PFKEY_UNIT64(len);
p->sadb_sa_exttype = SADB_EXT_SA;
p->sadb_sa_spi = sav->spi;
p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
p->sadb_sa_state = sav->state;
p->sadb_sa_auth = sav->alg_auth;
p->sadb_sa_encrypt = sav->alg_enc;
p->sadb_sa_flags = sav->flags;
return(buf + len);
}
/*
* set data into sadb_address.
* `buf' must has been allocated sufficiently.
*/
static caddr_t
key_setsadbaddr(buf, exttype, saddr, prefixlen, ul_proto)
caddr_t buf;
u_int16_t exttype;
struct sockaddr *saddr;
u_int8_t prefixlen;
u_int16_t ul_proto;
{
struct sadb_address *p;
u_int len;
p = (struct sadb_address *)buf;
len = sizeof(struct sadb_address) + PFKEY_ALIGN8(saddr->sa_len);
bzero(p, len);
p->sadb_address_len = PFKEY_UNIT64(len);
p->sadb_address_exttype = exttype;
p->sadb_address_proto = ul_proto;
p->sadb_address_prefixlen = prefixlen;
p->sadb_address_reserved = 0;
bcopy(saddr, p + 1, saddr->sa_len);
return(buf + len);
}
/*
* set data into sadb_ident.
* `buf' must has been allocated sufficiently.
*/
static caddr_t
key_setsadbident(buf, exttype, idtype, string, stringlen, id)
caddr_t buf;
u_int16_t exttype, idtype;
caddr_t string;
int stringlen;
u_int64_t id;
{
struct sadb_ident *p;
u_int len;
p = (struct sadb_ident *)buf;
len = sizeof(struct sadb_ident) + PFKEY_ALIGN8(stringlen);
bzero(p, len);
p->sadb_ident_len = PFKEY_UNIT64(len);
p->sadb_ident_exttype = exttype;
p->sadb_ident_type = idtype;
p->sadb_ident_reserved = 0;
p->sadb_ident_id = id;
bcopy(string, p + 1, stringlen);
return(buf + len);
}
/*
* copy buffer of any sadb extension type into sadb_ext.
* assume that sadb_ext_len shifted down >> 3.
* i.e. shift length up when setting length of extension.
*/
static caddr_t
key_setsadbext(p, ext)
caddr_t p, ext;
{
u_int len;
len = PFKEY_UNUNIT64(((struct sadb_ext *)ext)->sadb_ext_len);
bcopy(ext, p, len);
return(p + len);
}
/* %%% utilities */
/*
* copy a buffer into the new buffer allocated.
*/
static void *
key_newbuf(src, len)
void *src;
u_int len;
{
caddr_t new;
KMALLOC(new, caddr_t, len);
if (new == NULL) {
printf("key_newbuf: No more memory.\n");
return NULL;
}
bcopy((caddr_t)src, new, len);
return new;
}
/* compare my own address
* OUT: 1: true, i.e. my address.
* 0: false
*/
int
key_ismyaddr(family, addr)
u_int family;
caddr_t addr;
{
/* sanity check */
if (addr == NULL)
panic("key_ismyaddr: NULL pointer is passed.\n");
switch (family) {
case AF_INET:
{
struct in_ifaddr *ia;
for (ia = in_ifaddrhead.tqh_first; ia;
ia = ia->ia_link.tqe_next)
if (bcmp(addr,
(caddr_t)&ia->ia_addr.sin_addr,
_INALENBYAF(family)) == 0)
return 1;
}
break;
#ifdef INET6
case AF_INET6:
return key_ismyaddr6(addr);
#endif
}
return 0;
}
#ifdef INET6
/*
* compare my own address for IPv6.
* 1: ours
* 0: other
* NOTE: derived ip6_input() in KAME. This is necessary to modify more.
*/
#include <netinet6/in6.h>
#include <netinet6/in6_var.h>
static int
key_ismyaddr6(addr)
caddr_t addr;
{
struct in6_addr *a = (struct in6_addr *)addr;
struct in6_ifaddr *ia;
for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
if (bcmp(addr, (caddr_t)&ia->ia_addr.sin6_addr,
_INALENBYAF(AF_INET6)) == 0) {
return 1;
}
/* XXX Multicast */
{
struct in6_multi *in6m = 0;
IN6_LOOKUP_MULTI(*(struct in6_addr *)addr, ia->ia_ifp, in6m);
if (in6m)
return 1;
}
}
/* loopback, just for safety */
if (IN6_IS_ADDR_LOOPBACK(a))
return 1;
/* XXX anycast */
return 0;
}
#endif /*INET6*/
/*
* compare two secasindex structure exactly.
* IN:
* saidx0: source, it can be in SAD.
* saidx1: object, it can be from SPD.
* OUT:
* 1 : equal
* 0 : not equal
*/
static int
key_cmpsaidx_exactly(saidx0, saidx1)
struct secasindex *saidx0, *saidx1;
{
/* sanity */
if (saidx0 == NULL && saidx1 == NULL)
return 1;
if (saidx0 == NULL || saidx1 == NULL)
return 0;
if (saidx0->proto != saidx1->proto
|| saidx0->mode != saidx1->mode)
return 0;
if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.__ss_len) != 0
|| bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.__ss_len) != 0)
return 0;
return 1;
}
/*
* compare two secasindex structure with consideration mode.
* don't compare port.
* IN:
* saidx0: source, it is often in SAD.
* saidx1: object, it is often from SPD.
* OUT:
* 1 : equal
* 0 : not equal
*/
static int
key_cmpsaidx_withmode(saidx0, saidx1)
struct secasindex *saidx0, *saidx1;
{
/* sanity */
if (saidx0 == NULL && saidx1 == NULL)
return 1;
if (saidx0 == NULL || saidx1 == NULL)
return 0;
if (saidx0->proto != saidx1->proto
|| saidx0->src.__ss_family != saidx1->src.__ss_family
|| saidx0->dst.__ss_family != saidx1->dst.__ss_family)
return 0;
if (saidx0->mode != IPSEC_MODE_ANY
&& saidx0->mode != saidx1->mode)
return 0;
{
int sa_len = _INALENBYAF(saidx0->src.__ss_family);
if (bcmp(_INADDRBYSA(&saidx0->src), _INADDRBYSA(&saidx1->src), sa_len)
|| bcmp(_INADDRBYSA(&saidx0->dst), _INADDRBYSA(&saidx1->dst), sa_len))
return 0;
}
return 1;
}
/*
* compare two secindex structure exactly.
* IN:
* spidx0: source, it is often in SPD.
* spidx1: object, it is often from PFKEY message.
* OUT:
* 1 : equal
* 0 : not equal
*/
static int
key_cmpspidx_exactly(spidx0, spidx1)
struct secpolicyindex *spidx0, *spidx1;
{
/* sanity */
if (spidx0 == NULL && spidx1 == NULL)
return 1;
if (spidx0 == NULL || spidx1 == NULL)
return 0;
if (spidx0->prefs != spidx1->prefs
|| spidx0->prefd != spidx1->prefd
|| spidx0->ul_proto != spidx1->ul_proto)
return 0;
if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.__ss_len) != 0
|| bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.__ss_len) != 0)
return 0;
return 1;
}
/*
* compare two secindex structure with mask.
* IN:
* spidx0: source, it is often in SPD.
* spidx1: object, it is often from IP header.
* OUT:
* 1 : equal
* 0 : not equal
*/
static int
key_cmpspidx_withmask(spidx0, spidx1)
struct secpolicyindex *spidx0, *spidx1;
{
/* sanity */
if (spidx0 == NULL && spidx1 == NULL)
return 1;
if (spidx0 == NULL || spidx1 == NULL)
return 0;
if (spidx0->src.__ss_family != spidx1->src.__ss_family
|| spidx0->dst.__ss_family != spidx1->dst.__ss_family)
return 0;
/* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
&& spidx0->ul_proto != spidx1->ul_proto)
return 0;
if (_INPORTBYSA(&spidx0->src) != IPSEC_PORT_ANY
&& _INPORTBYSA(&spidx0->src) != _INPORTBYSA(&spidx1->src))
return 0;
if (_INPORTBYSA(&spidx0->dst) != IPSEC_PORT_ANY
&& _INPORTBYSA(&spidx0->dst) != _INPORTBYSA(&spidx1->dst))
return 0;
if (!key_bbcmp(_INADDRBYSA(&spidx0->src),
_INADDRBYSA(&spidx1->src),
spidx0->prefs))
return 0;
if (!key_bbcmp(_INADDRBYSA(&spidx0->dst),
_INADDRBYSA(&spidx1->dst),
spidx0->prefd))
return 0;
/* XXX Do we check other field ? e.g. flowinfo, scope_id. */
return 1;
}
/*
* compare two buffers with mask.
* IN:
* addr1: source
* addr2: object
* bits: Number of bits to compare
* OUT:
* 1 : equal
* 0 : not equal
*/
static int
key_bbcmp(p1, p2, bits)
register caddr_t p1, p2;
register u_int bits;
{
u_int8_t mask;
/* XXX: This could be considerably faster if we compare a word
* at a time, but it is complicated on LSB Endian machines */
/* Handle null pointers */
if (p1 == NULL || p2 == NULL)
return (p1 == p2);
while (bits >= 8) {
if (*p1++ != *p2++)
return 0;
bits -= 8;
}
if (bits > 0) {
mask = ~((1<<(8-bits))-1);
if ((*p1 & mask) != (*p2 & mask))
return 0;
}
return 1; /* Match! */
}
/*
* time handler.
* scanning SPD and SAD to check status for each entries,
* and do to remove or to expire.
*/
void
key_timehandler(void)
{
u_int dir;
int s;
s = splnet(); /*called from softclock()*/
/* SPD */
{
struct secpolicy *sp, *nextsp;
for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
for (sp = LIST_FIRST(&sptree[dir]);
sp != NULL;
sp = nextsp) {
nextsp = LIST_NEXT(sp, chain);
if (sp->state == IPSEC_SPSTATE_DEAD)
key_freesp(sp);
}
}
}
/* SAD */
{
struct secashead *sah, *nextsah;
struct secasvar *sav, *nextsav;
for (sah = LIST_FIRST(&sahtree);
sah != NULL;
sah = nextsah) {
nextsah = LIST_NEXT(sah, chain);
/* if sah has been dead, then delete it and process next sah. */
if (sah->state == SADB_SASTATE_DEAD) {
key_delsah(sah);
continue;
}
/* if LARVAL entry doesn't become MATURE, delete it. */
for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
sav != NULL;
sav = nextsav) {
nextsav = LIST_NEXT(sav, chain);
sav->tick++;
if (key_larval_lifetime < sav->tick) {
key_freesav(sav);
}
}
/*
* check MATURE entry to start to send expire message
* whether or not.
*/
for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
sav != NULL;
sav = nextsav) {
nextsav = LIST_NEXT(sav, chain);
sav->tick++;
/* we don't need to check. */
if (sav->lft_s == NULL)
continue;
/* sanity check */
if (sav->lft_c == NULL) {
printf("key_timehandler: "
"There is no CURRENT time, why?\n");
continue;
}
/* compare SOFT lifetime and tick */
if (sav->lft_s->sadb_lifetime_addtime != 0
&& sav->lft_s->sadb_lifetime_addtime < sav->tick) {
/*
* check SA to be used whether or not.
* when SA hasn't been used, delete it.
*/
if (sav->lft_c->sadb_lifetime_usetime == 0) {
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
key_freesav(sav);
sav = NULL;
} else {
key_sa_chgstate(sav, SADB_SASTATE_DYING);
/*
* XXX If we keep to send expire
* message in the status of
* DYING. Do remove below code.
*/
key_expire(sav);
}
}
/* check SOFT lifetime by bytes */
/*
* XXX I don't know the way to delete this SA
* when new SA is installed. Caution when it's
* installed too big lifetime by time.
*/
else if (sav->lft_s->sadb_lifetime_bytes != 0
&& sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
key_sa_chgstate(sav, SADB_SASTATE_DYING);
/*
* XXX If we keep to send expire
* message in the status of
* DYING. Do remove below code.
*/
key_expire(sav);
}
}
/* check DYING entry to change status to DEAD. */
for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
sav != NULL;
sav = nextsav) {
nextsav = LIST_NEXT(sav, chain);
sav->tick++;
/* we don't need to check. */
if (sav->lft_h == NULL)
continue;
/* sanity check */
if (sav->lft_c == NULL) {
printf("key_timehandler: "
"There is no CURRENT time, why?\n");
continue;
}
/* compare HARD lifetime and tick */
if (sav->lft_h->sadb_lifetime_addtime != 0
&& sav->lft_h->sadb_lifetime_addtime < sav->tick) {
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
key_freesav(sav);
sav = NULL;
}
/* check HARD lifetime by bytes */
else if (sav->lft_h->sadb_lifetime_bytes != 0
&& sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
key_freesav(sav);
sav = NULL;
}
}
/* delete entry in DEAD */
for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
sav != NULL;
sav = nextsav) {
nextsav = LIST_NEXT(sav, chain);
/* sanity check */
if (sav->state != SADB_SASTATE_DEAD) {
printf("key_timehandler: "
"invalid sav->state "
"(queue: %d SA: %d): "
"kill it anyway\n",
SADB_SASTATE_DEAD, sav->state);
}
/*
* do not call key_freesav() here.
* sav should already be freed, and sav->refcnt
* shows other references to sav
* (such as from SPD).
*/
}
}
}
#ifndef IPSEC_NONBLOCK_ACQUIRE
/* ACQ tree */
{
struct secacq *acq, *nextacq;
for (acq = LIST_FIRST(&acqtree);
acq != NULL;
acq = nextacq) {
nextacq = LIST_NEXT(acq, chain);
acq->tick++;
if (key_blockacq_lifetime < acq->tick && __LIST_CHAINED(acq)) {
LIST_REMOVE(acq, chain);
KFREE(acq);
}
}
}
#endif
/* initialize random seed */
if (key_tick_init_random++ > key_int_random) {
key_tick_init_random = 0;
key_srandom();
}
#ifndef IPSEC_DEBUG2
/* do exchange to tick time !! */
(void)timeout((void *)key_timehandler, (void *)0, 100);
#endif /* IPSEC_DEBUG2 */
splx(s);
return;
}
/*
* to initialize a seed for random()
*/
void
key_srandom()
{
struct timeval tv;
microtime(&tv);
srandom(tv.tv_usec);
return;
}
/*
* map SADB_SATYPE_* to IPPROTO_*.
* if satype == SADB_SATYPE then satype is mapped to ~0.
* OUT:
* 0: invalid satype.
*/
static u_int16_t
key_satype2proto(satype)
u_int8_t satype;
{
switch (satype) {
case SADB_SATYPE_UNSPEC:
return IPSEC_PROTO_ANY;
case SADB_SATYPE_AH:
return IPPROTO_AH;
case SADB_SATYPE_ESP:
return IPPROTO_ESP;
default:
return 0;
}
/* NOTREACHED */
}
/*
* map IPPROTO_* to SADB_SATYPE_*
* OUT:
* 0: invalid protocol type.
*/
static u_int8_t
key_proto2satype(proto)
u_int16_t proto;
{
switch (proto) {
case IPPROTO_AH:
return SADB_SATYPE_AH;
case IPPROTO_ESP:
return SADB_SATYPE_ESP;
default:
return 0;
}
/* NOTREACHED */
}
/* %%% PF_KEY */
/*
* SADB_GETSPI processing is to receive
* <base, src address, dst address, (SPI range)>
* from the IKMPd, to assign a unique spi value, to hang on the INBOUND
* tree with the status of LARVAL, and send
* <base, SA(*), address(SD)>
* to the IKMPd.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_getspi(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_address *src0, *dst0;
struct secasindex saidx;
struct secashead *newsah;
struct secasvar *newsav;
u_int8_t proto;
u_int32_t spi;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_getspi: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
if (mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL) {
printf("key_getspi: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_getspi: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
KEY_SETSECASIDX(proto, msg0->sadb_msg_mode, src0+1, dst0+1, &saidx);
/* SPI allocation */
spi = key_do_getnewspi((struct sadb_spirange *)mhp[SADB_EXT_SPIRANGE],
&saidx);
if (spi == 0) {
msg0->sadb_msg_errno = EEXIST;
return NULL;
}
/* get a SA index */
if ((newsah = key_getsah(&saidx)) == NULL) {
/* create a new SA index */
if ((newsah = key_newsah(&saidx)) == NULL) {
printf("key_getspi: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
}
/* get a new SA */
if ((newsav = key_newsav(mhp, newsah)) == NULL) {
msg0->sadb_msg_errno = ENOBUFS;
/* XXX don't free new SA index allocated in above. */
return NULL;
}
/* set spi */
newsav->spi = htonl(spi);
#ifndef IPSEC_NONBLOCK_ACQUIRE
/* delete the entry in acqtree */
if (msg0->sadb_msg_seq != 0) {
struct secacq *acq;
if ((acq = key_getacqbyseq(msg0->sadb_msg_seq)) != NULL) {
/* reset counter in order to deletion by timehander. */
acq->tick = key_blockacq_lifetime;
acq->count = 0;
}
}
#endif
{
struct sadb_msg *newmsg;
u_int len;
caddr_t p;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ sizeof(struct sadb_sa)
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_getspi: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_seq = newsav->seq;
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
p = (caddr_t)newmsg + sizeof(*msg0);
{
struct sadb_sa *m_sa;
m_sa = (struct sadb_sa *)p;
m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
m_sa->sadb_sa_exttype = SADB_EXT_SA;
m_sa->sadb_sa_spi = htonl(spi);
p += sizeof(struct sadb_sa);
}
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]);
return newmsg;
}
}
/*
* allocating new SPI
* called by key_getspi().
* OUT:
* 0: failure.
* others: success.
*/
static u_int32_t
key_do_getnewspi(spirange, saidx)
struct sadb_spirange *spirange;
struct secasindex *saidx;
{
u_int32_t newspi;
u_int32_t min, max;
int count = key_spi_trycnt;
/* set spi range to allocate */
if (spirange != NULL) {
min = spirange->sadb_spirange_min;
max = spirange->sadb_spirange_max;
} else {
min = key_spi_minval;
max = key_spi_maxval;
}
if (min == max) {
if (key_checkspidup(saidx, min) != NULL) {
printf("key_do_getnewspi: SPI %u exists already.\n", min);
return 0;
}
count--; /* taking one cost. */
newspi = min;
} else {
/* init SPI */
newspi = 0;
/* when requesting to allocate spi ranged */
while (count--) {
/* generate pseudo-random SPI value ranged. */
newspi = min + (random() % ( max - min + 1 ));
if (key_checkspidup(saidx, newspi) == NULL)
break;
}
if (count == 0 || newspi == 0) {
printf("key_do_getnewspi: to allocate spi is failed.\n");
return 0;
}
}
/* statistics */
keystat.getspi_count =
(keystat.getspi_count + key_spi_trycnt - count) / 2;
return newspi;
}
/*
* SADB_UPDATE processing
* receive
* <base, SA, (lifetime(HSC),) address(SD), (address(P),)
* key(AE), (identity(SD),) (sensitivity)>
* from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
* and send
* <base, SA, (lifetime(HSC),) address(SD), (address(P),)
* (identity(SD),) (sensitivity)>
* to the ikmpd.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_update(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_sa *sa0;
struct sadb_address *src0, *dst0;
struct secasindex saidx;
struct secashead *sah;
struct secasvar *sav;
u_int16_t proto;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_update: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_update: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (mhp[SADB_EXT_SA] == NULL
|| mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL
|| (msg0->sadb_msg_satype == SADB_SATYPE_ESP
&& mhp[SADB_EXT_KEY_ENCRYPT] == NULL)
|| (msg0->sadb_msg_satype == SADB_SATYPE_AH
&& mhp[SADB_EXT_KEY_AUTH] == NULL)
|| (mhp[SADB_EXT_LIFETIME_HARD] != NULL
&& mhp[SADB_EXT_LIFETIME_SOFT] == NULL)
|| (mhp[SADB_EXT_LIFETIME_HARD] == NULL
&& mhp[SADB_EXT_LIFETIME_SOFT] != NULL)) {
printf("key_update: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA];
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
KEY_SETSECASIDX(proto, msg0->sadb_msg_mode, src0+1, dst0+1, &saidx);
/* get a SA header */
if ((sah = key_getsah(&saidx)) == NULL) {
printf("key_update: no SA index found.\n");
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
/* find a SA with sequence number. */
if ((sav = key_getsavbyseq(sah, msg0->sadb_msg_seq)) == NULL) {
printf("key_update: no larval SA with sequence %u exists.\n",
msg0->sadb_msg_seq);
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
/* validity check */
if (sav->sah->saidx.proto != proto) {
printf("key_update: protocol mismatched (DB=%u param=%u)\n",
sav->sah->saidx.proto, proto);
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (sav->spi != sa0->sadb_sa_spi) {
printf("key_update: SPI mismatched (DB:%u param:%u)\n",
(u_int32_t)ntohl(sav->spi),
(u_int32_t)ntohl(sa0->sadb_sa_spi));
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (sav->pid != msg0->sadb_msg_pid) {
printf("key_update: pid mismatched (DB:%u param:%u)\n",
sav->pid, msg0->sadb_msg_pid);
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* copy sav values */
if (key_setsaval(sav, mhp)) {
key_freesav(sav);
return NULL;
}
/* check SA values to be mature. */
if ((msg0->sadb_msg_errno = key_mature(sav)) != 0) {
key_freesav(sav);
return NULL;
}
/*
* we must call key_freesav() whenever we leave a function context,
* as we did not allocated a new sav (we updated existing sav).
*/
key_freesav(sav);
sav = NULL;
{
struct sadb_msg *newmsg;
/* set msg buf from mhp */
if ((newmsg = key_getmsgbuf_x1(mhp)) == NULL) {
printf("key_update: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
return newmsg;
}
}
/*
* search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
* only called by key_update().
* OUT:
* NULL : not found
* others : found, pointer to a SA.
*/
static struct secasvar *
key_getsavbyseq(sah, seq)
struct secashead *sah;
u_int32_t seq;
{
struct secasvar *sav;
u_int state;
state = SADB_SASTATE_LARVAL;
/* search SAD with sequence number ? */
__LIST_FOREACH(sav, &sah->savtree[state], chain) {
KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
if (sav->seq == seq) {
sav->refcnt++;
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
printf("DP key_getsavbyseq cause "
"refcnt++:%d SA:%p\n",
sav->refcnt, sav));
return sav;
}
}
return NULL;
}
/*
* SADB_ADD processing
* add a entry to SA database, when received
* <base, SA, (lifetime(HSC),) address(SD), (address(P),)
* key(AE), (identity(SD),) (sensitivity)>
* from the ikmpd,
* and send
* <base, SA, (lifetime(HSC),) address(SD), (address(P),)
* (identity(SD),) (sensitivity)>
* to the ikmpd.
*
* IGNORE identity and sensitivity messages.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_add(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_sa *sa0;
struct sadb_address *src0, *dst0;
struct secasindex saidx;
struct secashead *newsah;
struct secasvar *newsav;
u_int16_t proto;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_add: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_add: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (mhp[SADB_EXT_SA] == NULL
|| mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL
|| (msg0->sadb_msg_satype == SADB_SATYPE_ESP
&& mhp[SADB_EXT_KEY_ENCRYPT] == NULL)
|| (msg0->sadb_msg_satype == SADB_SATYPE_AH
&& mhp[SADB_EXT_KEY_AUTH] == NULL)
|| (mhp[SADB_EXT_LIFETIME_HARD] != NULL
&& mhp[SADB_EXT_LIFETIME_SOFT] == NULL)
|| (mhp[SADB_EXT_LIFETIME_HARD] == NULL
&& mhp[SADB_EXT_LIFETIME_SOFT] != NULL)) {
printf("key_add: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA];
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
KEY_SETSECASIDX(proto, msg0->sadb_msg_mode, src0+1, dst0+1, &saidx);
/* get a SA header */
if ((newsah = key_getsah(&saidx)) == NULL) {
/* create a new SA header */
if ((newsah = key_newsah(&saidx)) == NULL) {
printf("key_add: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
}
/* create new SA entry. */
/* We can create new SA only if SPI is differenct. */
if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
printf("key_add: SA already exists.\n");
msg0->sadb_msg_errno = EEXIST;
return NULL;
}
if ((newsav = key_newsav(mhp, newsah)) == NULL)
return NULL;
/* check SA values to be mature. */
if ((msg0->sadb_msg_errno = key_mature(newsav)) != NULL) {
key_freesav(newsav);
return NULL;
}
/*
* don't call key_freesav() here, as we would like to keep the SA
* in the database on success.
*/
{
struct sadb_msg *newmsg;
/* set msg buf from mhp */
if ((newmsg = key_getmsgbuf_x1(mhp)) == NULL) {
printf("key_add: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
return newmsg;
}
}
static struct sadb_msg *
key_getmsgbuf_x1(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_msg *newmsg;
u_int len;
caddr_t p;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_getmsgbuf_x1: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ sizeof(struct sadb_sa)
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST])
+ (mhp[SADB_EXT_LIFETIME_HARD] == NULL
? 0 : sizeof(struct sadb_lifetime))
+ (mhp[SADB_EXT_LIFETIME_SOFT] == NULL
? 0 : sizeof(struct sadb_lifetime));
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL)
return NULL;
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
p = (caddr_t)newmsg + sizeof(*msg0);
p = key_setsadbext(p, mhp[SADB_EXT_SA]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]);
if (mhp[SADB_EXT_LIFETIME_HARD] != NULL)
p = key_setsadbext(p, mhp[SADB_EXT_LIFETIME_HARD]);
if (mhp[SADB_EXT_LIFETIME_SOFT] != NULL)
p = key_setsadbext(p, mhp[SADB_EXT_LIFETIME_SOFT]);
return newmsg;
}
/*
* SADB_DELETE processing
* receive
* <base, SA(*), address(SD)>
* from the ikmpd, and set SADB_SASTATE_DEAD,
* and send,
* <base, SA(*), address(SD)>
* to the ikmpd.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_delete(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_sa *sa0;
struct sadb_address *src0, *dst0;
struct secasindex saidx;
struct secashead *sah;
struct secasvar *sav;
u_int16_t proto;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_delete: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_delete: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (mhp[SADB_EXT_SA] == NULL
|| mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL) {
printf("key_delete: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA];
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
KEY_SETSECASIDX(proto, msg0->sadb_msg_mode, src0+1, dst0+1, &saidx);
/* get a SA header */
if ((sah = key_getsah(&saidx)) == NULL) {
printf("key_delete: no SA found.\n");
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
/* get a SA with SPI. */
sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
if (sav == NULL) {
printf("key_delete: no alive SA found.\n");
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
key_freesav(sav);
sav = NULL;
{
struct sadb_msg *newmsg;
u_int len;
caddr_t p;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ sizeof(struct sadb_sa)
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_SRC])
+ PFKEY_EXTLEN(mhp[SADB_EXT_ADDRESS_DST]);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_delete: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
p = (caddr_t)newmsg + sizeof(*msg0);
p = key_setsadbext(p, mhp[SADB_EXT_SA]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_SRC]);
p = key_setsadbext(p, mhp[SADB_EXT_ADDRESS_DST]);
return newmsg;
}
}
/*
* SADB_GET processing
* receive
* <base, SA(*), address(SD)>
* from the ikmpd, and get a SP and a SA to respond,
* and send,
* <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
* (identity(SD),) (sensitivity)>
* to the ikmpd.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_get(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_sa *sa0;
struct sadb_address *src0, *dst0;
struct secasindex saidx;
struct secashead *sah;
struct secasvar *sav;
u_int16_t proto;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_get: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_get: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (mhp[SADB_EXT_SA] == NULL
|| mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL) {
printf("key_get: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
sa0 = (struct sadb_sa *)mhp[SADB_EXT_SA];
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
KEY_SETSECASIDX(proto, msg0->sadb_msg_mode, src0+1, dst0+1, &saidx);
/* get a SA header */
if ((sah = key_getsah(&saidx)) == NULL) {
printf("key_get: no SA found.\n");
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
/* get a SA with SPI. */
sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
if (sav == NULL) {
printf("key_get: no SA with state of mature found.\n");
msg0->sadb_msg_errno = ENOENT;
return NULL;
}
{
struct sadb_msg *newmsg;
u_int len;
u_int8_t satype;
/* map proto to satype */
if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
printf("key_get: there was invalid proto in SAD.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* calculate a length of message buffer */
len = key_getmsglen(sav);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_get: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
/* create new sadb_msg to reply. */
(void)key_setdumpsa(newmsg, sav, SADB_GET,
satype, msg0->sadb_msg_seq, msg0->sadb_msg_pid);
return newmsg;
}
}
/*
* SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
* send
* <base, SA, address(SD), (address(P)),
* (identity(SD),) (sensitivity,) proposal>
* to KMD, and expect to receive
* <base> with SADB_ACQUIRE if error occured,
* or
* <base, src address, dst address, (SPI range)> with SADB_GETSPI
* from KMD by PF_KEY.
*
* sensitivity is not supported.
*
* OUT:
* 0 : succeed
* others: error number
*/
static int
key_acquire(saidx, spidx)
struct secasindex *saidx;
struct secpolicyindex *spidx;
{
#ifndef IPSEC_NONBLOCK_ACQUIRE
struct secacq *newacq;
#endif
u_int8_t satype;
int error;
/* sanity check */
if (saidx == NULL || spidx == NULL)
panic("key_acquire: NULL pointer is passed.\n");
if ((satype = key_proto2satype(saidx->proto)) == 0)
panic("key_acquire: invalid proto is passed.\n");
#ifndef IPSEC_NONBLOCK_ACQUIRE
/*
* We never do anything about acquirng SA. There is anather
* solution that kernel blocks to send SADB_ACQUIRE message until
* getting something message from IKEd. In later case, to be
* managed with ACQUIRING list.
*/
/* get a entry to check whether sending message or not. */
if ((newacq = key_getacq(saidx)) != NULL) {
if (key_blockacq_count < newacq->count) {
/* reset counter and do send message. */
newacq->count = 0;
} else {
/* increment counter and do nothing. */
newacq->count++;
return 0;
}
} else {
/* make new entry for blocking to send SADB_ACQUIRE. */
if ((newacq = key_newacq(saidx)) == NULL)
return ENOBUFS;
/* add to acqtree */
LIST_INSERT_HEAD(&acqtree, newacq, chain);
}
#endif
{
struct sadb_msg *newmsg = NULL;
union sadb_x_ident_id id;
u_int len;
caddr_t p;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ sizeof(struct sadb_address)
+ PFKEY_ALIGN8(saidx->src.__ss_len)
+ sizeof(struct sadb_address)
+ PFKEY_ALIGN8(saidx->dst.__ss_len)
+ sizeof(struct sadb_ident)
+ PFKEY_ALIGN8(spidx->src.__ss_len)
+ sizeof(struct sadb_ident)
+ PFKEY_ALIGN8(spidx->dst.__ss_len)
+ sizeof(struct sadb_prop)
+ sizeof(struct sadb_comb); /* XXX to be multiple */
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == 0) {
printf("key_acquire: No more memory.\n");
return ENOBUFS;
}
bzero((caddr_t)newmsg, len);
newmsg->sadb_msg_version = PF_KEY_V2;
newmsg->sadb_msg_type = SADB_ACQUIRE;
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_satype = satype;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
#ifndef IPSEC_NONBLOCK_ACQUIRE
newmsg->sadb_msg_seq = newacq->seq;
#else
newmsg->sadb_msg_seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
#endif
newmsg->sadb_msg_pid = 0;
p = (caddr_t)newmsg + sizeof(struct sadb_msg);
/* set sadb_address for saidx's. */
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_SRC,
(struct sockaddr *)&saidx->src,
_INALENBYAF(saidx->src.__ss_family) << 3,
IPSEC_ULPROTO_ANY);
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_DST,
(struct sockaddr *)&saidx->dst,
_INALENBYAF(saidx->dst.__ss_family) << 3,
IPSEC_ULPROTO_ANY);
/* set sadb_address for spidx's. */
id.sadb_x_ident_id_addr.prefix = spidx->prefs;
id.sadb_x_ident_id_addr.ul_proto = spidx->ul_proto;
p = key_setsadbident(p,
SADB_EXT_IDENTITY_SRC,
SADB_X_IDENTTYPE_ADDR,
(caddr_t)&spidx->src,
spidx->src.__ss_len,
*(u_int64_t *)&id);
id.sadb_x_ident_id_addr.prefix = spidx->prefd;
id.sadb_x_ident_id_addr.ul_proto = spidx->ul_proto;
p = key_setsadbident(p,
SADB_EXT_IDENTITY_DST,
SADB_X_IDENTTYPE_ADDR,
(caddr_t)&spidx->dst,
spidx->dst.__ss_len,
*(u_int64_t *)&id);
/* create proposal extension */
/* set combination extension */
/* XXX: to be defined by proposal database */
{
struct sadb_prop *prop;
struct sadb_comb *comb;
prop = (struct sadb_prop *)p;
prop->sadb_prop_len = PFKEY_UNIT64(sizeof(*prop) + sizeof(*comb));
/* XXX to be multiple */
prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
prop->sadb_prop_replay = 32; /* XXX be variable ? */
p += sizeof(struct sadb_prop);
comb = (struct sadb_comb *)p;
comb->sadb_comb_auth = SADB_AALG_SHA1HMAC; /* XXX ??? */
comb->sadb_comb_encrypt = SADB_EALG_DESCBC; /* XXX ??? */
comb->sadb_comb_flags = 0;
comb->sadb_comb_auth_minbits = 8; /* XXX */
comb->sadb_comb_auth_maxbits = 1024; /* XXX */
comb->sadb_comb_encrypt_minbits = 64; /* XXX */
comb->sadb_comb_encrypt_maxbits = 64; /* XXX */
comb->sadb_comb_soft_allocations = 0;
comb->sadb_comb_hard_allocations = 0;
comb->sadb_comb_soft_bytes = 0;
comb->sadb_comb_hard_bytes = 0;
comb->sadb_comb_soft_addtime = 0;
comb->sadb_comb_hard_addtime = 0;
comb->sadb_comb_soft_usetime = 0;
comb->sadb_comb_hard_usetime = 0;
p += sizeof(*comb);
}
error = key_sendall(newmsg, len);
if (error != 0)
printf("key_acquire: key_sendall returned %d\n", error);
return error;
}
return 0;
}
#ifndef IPSEC_NONBLOCK_ACQUIRE
static struct secacq *
key_newacq(saidx)
struct secasindex *saidx;
{
struct secacq *newacq;
/* get new entry */
KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
if (newacq == NULL) {
printf("key_newacq: No more memory.\n");
return NULL;
}
bzero(newacq, sizeof(*newacq));
/* copy secindex */
bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
newacq->tick = 0;
newacq->count = 0;
return newacq;
}
static struct secacq *
key_getacq(saidx)
struct secasindex *saidx;
{
struct secacq *acq;
__LIST_FOREACH(acq, &acqtree, chain) {
if (key_cmpsaidx_exactly(saidx, &acq->saidx))
return acq;
}
return NULL;
}
static struct secacq *
key_getacqbyseq(seq)
u_int32_t seq;
{
struct secacq *acq;
__LIST_FOREACH(acq, &acqtree, chain) {
if (acq->seq == seq)
return acq;
}
return NULL;
}
#endif
/*
* SADB_ACQUIRE processing,
* in first situation, is receiving
* <base>
* from the ikmpd, and clear sequence of its secasvar entry.
*
* In second situation, is receiving
* <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
* from a user land process, and return
* <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
* to the socket.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_acquire2(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct sadb_address *src0, *dst0;
struct secasindex saidx;
struct secashead *sah;
u_int16_t proto;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_acquire2: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/*
* Error message from KMd.
* We assume that if error was occured in IKEd, the length of PFKEY
* message is equal to the size of sadb_msg structure.
* We return ~0 even if error occured in this function.
*/
if (msg0->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
#ifndef IPSEC_NONBLOCK_ACQUIRE
struct secacq *acq;
/* check sequence number */
if (msg0->sadb_msg_seq == 0) {
printf("key_acquire2: must specify sequence number.\n");
return (struct sadb_msg *)~0;
}
if ((acq = key_getacqbyseq(msg0->sadb_msg_seq)) == NULL) {
printf("key_acquire2: "
"invalid sequence number is passed.\n");
return (struct sadb_msg *)~0;
}
/* reset acq counter in order to deletion by timehander. */
acq->tick = key_blockacq_lifetime;
acq->count = 0;
#endif
return (struct sadb_msg *)~0;
/* NOTREACHED */
}
/*
* This message is from user land.
*/
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_acquire2: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
if (mhp[SADB_EXT_ADDRESS_SRC] == NULL
|| mhp[SADB_EXT_ADDRESS_DST] == NULL
|| mhp[SADB_EXT_PROPOSAL] == NULL) {
/* error */
printf("key_acquire2: invalid message is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
KEY_SETSECASIDX(proto, msg0->sadb_msg_mode, src0+1, dst0+1, &saidx);
/* get a SA index */
if ((sah = key_getsah(&saidx)) != NULL) {
printf("key_acquire2: a SA exists already.\n");
msg0->sadb_msg_errno = EEXIST;
return NULL;
}
msg0->sadb_msg_errno = key_acquire(&saidx, NULL);
if (msg0->sadb_msg_errno != 0) {
/* XXX What I do ? */
printf("key_acquire2: error %d returned "
"from key_acquire.\n", msg0->sadb_msg_errno);
return NULL;
}
{
struct sadb_msg *newmsg;
u_int len;
/* create new sadb_msg to reply. */
len = PFKEY_UNUNIT64(msg0->sadb_msg_len);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_acquire2: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy(mhp[0], (caddr_t)newmsg, len);
return newmsg;
}
}
/*
* SADB_REGISTER processing.
* If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
* receive
* <base>
* from the ikmpd, and register a socket to send PF_KEY messages,
* and send
* <base, supported>
* to KMD by PF_KEY.
* If socket is detached, must free from regnode.
* OUT:
* 0 : succeed
* others: error number
*/
static struct sadb_msg *
key_register(mhp, so)
caddr_t *mhp;
struct socket *so;
{
struct sadb_msg *msg0;
struct secreg *reg, *newreg = 0;
/* sanity check */
if (mhp == NULL || so == NULL || mhp[0] == NULL)
panic("key_register: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* When SATYPE_UNSPEC is specified, only return sabd_supported. */
if (msg0->sadb_msg_satype == SADB_SATYPE_UNSPEC)
goto setmsg;
/* check whether existing or not */
__LIST_FOREACH(reg, &regtree[msg0->sadb_msg_satype], chain) {
if (reg->so == so) {
printf("key_register: socket exists already.\n");
msg0->sadb_msg_errno = EEXIST;
return NULL;
}
}
/* create regnode */
KMALLOC(newreg, struct secreg *, sizeof(struct secreg));
if (newreg == NULL) {
printf("key_register: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newreg, sizeof(struct secreg));
newreg->so = so;
((struct keycb *)sotorawcb(so))->kp_registered++;
/* add regnode to regtree. */
LIST_INSERT_HEAD(&regtree[msg0->sadb_msg_satype], newreg, chain);
setmsg:
{
struct sadb_msg *newmsg;
struct sadb_supported *sup;
u_int len, alen, elen;
caddr_t p;
/* create new sadb_msg to reply. */
alen = sizeof(struct sadb_supported)
+ ((SADB_AALG_MAX - 1) * sizeof(struct sadb_alg));
#ifdef IPSEC_ESP
elen = sizeof(struct sadb_supported)
+ ((SADB_EALG_MAX - 1) * sizeof(struct sadb_alg));
#else
elen = 0;
#endif
len = sizeof(struct sadb_msg)
+ alen
+ elen;
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_register: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
p = (caddr_t)newmsg + sizeof(*msg0);
/* for authentication algorithm */
sup = (struct sadb_supported *)p;
sup->sadb_supported_len = PFKEY_UNIT64(alen);
sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
p += sizeof(*sup);
{
int i;
struct sadb_alg *alg;
struct ah_algorithm *algo;
for (i = 1; i < SADB_AALG_MAX; i++) {
algo = &ah_algorithms[i];
alg = (struct sadb_alg *)p;
alg->sadb_alg_id = i;
alg->sadb_alg_ivlen = 0;
alg->sadb_alg_minbits = algo->keymin;
alg->sadb_alg_maxbits = algo->keymax;
p += sizeof(struct sadb_alg);
}
}
#ifdef IPSEC_ESP
/* for encryption algorithm */
sup = (struct sadb_supported *)p;
sup->sadb_supported_len = PFKEY_UNIT64(elen);
sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
p += sizeof(*sup);
{
int i;
struct sadb_alg *alg;
struct esp_algorithm *algo;
for (i = 1; i < SADB_EALG_MAX; i++) {
algo = &esp_algorithms[i];
alg = (struct sadb_alg *)p;
alg->sadb_alg_id = i;
if (algo && algo->ivlen) {
/*
* give NULL to get the value preferred by algorithm
* XXX SADB_X_EXT_DERIV ?
*/
alg->sadb_alg_ivlen = (*algo->ivlen)(NULL);
} else
alg->sadb_alg_ivlen = 0;
alg->sadb_alg_minbits = algo->keymin;
alg->sadb_alg_maxbits = algo->keymax;
p += sizeof(struct sadb_alg);
}
}
#endif
return newmsg;
}
}
/*
* free secreg entry registered.
* XXX: I want to do free a socket marked done SADB_RESIGER to socket.
*/
void
key_freereg(so)
struct socket *so;
{
struct secreg *reg;
int i;
/* sanity check */
if (so == NULL)
panic("key_freereg: NULL pointer is passed.\n");
/*
* check whether existing or not.
* check all type of SA, because there is a potential that
* one socket is registered to multiple type of SA.
*/
for (i = 0; i <= SADB_SATYPE_MAX; i++) {
__LIST_FOREACH(reg, &regtree[i], chain) {
if (reg->so == so
&& __LIST_CHAINED(reg)) {
LIST_REMOVE(reg, chain);
KFREE(reg);
break;
}
}
}
return;
}
/*
* SADB_EXPIRE processing
* send
* <base, SA, lifetime(C and one of HS), address(SD)>
* to KMD by PF_KEY.
* NOTE: We send only soft lifetime extension.
*
* OUT: 0 : succeed
* others : error number
*/
static int
key_expire(sav)
struct secasvar *sav;
{
int s;
int satype;
/* XXX: Why do we lock ? */
s = splnet(); /*called from softclock()*/
/* sanity check */
if (sav == NULL)
panic("key_expire: NULL pointer is passed.\n");
if (sav->sah == NULL)
panic("key_expire: Why was SA index in SA NULL.\n");
if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
panic("key_expire: invalid proto is passed.\n");
{
struct sadb_msg *newmsg = NULL;
u_int len;
caddr_t p;
int error;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg)
+ sizeof(struct sadb_sa)
+ sizeof(struct sadb_lifetime)
+ sizeof(struct sadb_lifetime)
+ sizeof(struct sadb_address)
+ PFKEY_ALIGN8(sav->sah->saidx.src.__ss_len)
+ sizeof(struct sadb_address)
+ PFKEY_ALIGN8(sav->sah->saidx.dst.__ss_len);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_expire: No more memory.\n");
splx(s);
return ENOBUFS;
}
bzero((caddr_t)newmsg, len);
/* set msg header */
p = key_setsadbmsg((caddr_t)newmsg, SADB_EXPIRE, len,
satype, sav->seq, 0,
sav->sah->saidx.mode, sav->refcnt);
/* create SA extension */
p = key_setsadbsa(p, sav);
/* create lifetime extension */
{
struct sadb_lifetime *m_lt = (struct sadb_lifetime *)p;
m_lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
m_lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
m_lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
m_lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
m_lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
m_lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
p += sizeof(struct sadb_lifetime);
/* copy SOFT lifetime extension. */
bcopy(sav->lft_s, p, sizeof(struct sadb_lifetime));
p += sizeof(struct sadb_lifetime);
}
/* set sadb_address for source */
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_SRC,
(struct sockaddr *)&sav->sah->saidx.src,
_INALENBYAF(sav->sah->saidx.src.__ss_family) << 3,
IPSEC_ULPROTO_ANY);
/* set sadb_address for destination */
p = key_setsadbaddr(p,
SADB_EXT_ADDRESS_DST,
(struct sockaddr *)&sav->sah->saidx.dst,
_INALENBYAF(sav->sah->saidx.dst.__ss_family) << 3,
IPSEC_ULPROTO_ANY);
error = key_sendall(newmsg, len);
splx(s);
return error;
}
}
/*
* SADB_FLUSH processing
* receive
* <base>
* from the ikmpd, and free all entries in secastree.
* and send,
* <base>
* to the ikmpd.
* NOTE: to do is only marking SADB_SASTATE_DEAD.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: NULL if fail.
* other if success, return pointer to the message to send.
*/
static struct sadb_msg *
key_flush(mhp)
caddr_t *mhp;
{
struct sadb_msg *msg0;
struct secashead *sah, *nextsah;
struct secasvar *sav, *nextsav;
u_int16_t proto;
u_int8_t state;
u_int stateidx;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_flush: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_flush: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* no SATYPE specified, i.e. flushing all SA. */
for (sah = LIST_FIRST(&sahtree);
sah != NULL;
sah = nextsah) {
nextsah = LIST_NEXT(sah, chain);
if (msg0->sadb_msg_satype != SADB_SATYPE_UNSPEC
&& proto != sah->saidx.proto)
continue;
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_alive);
stateidx++) {
state = saorder_state_any[stateidx];
for (sav = LIST_FIRST(&sah->savtree[state]);
sav != NULL;
sav = nextsav) {
nextsav = LIST_NEXT(sav, chain);
key_sa_chgstate(sav, SADB_SASTATE_DEAD);
}
}
sah->state = SADB_SASTATE_DEAD;
}
{
struct sadb_msg *newmsg;
u_int len;
/* create new sadb_msg to reply. */
len = sizeof(struct sadb_msg);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_flush: No more memory.\n");
msg0->sadb_msg_errno = ENOBUFS;
return NULL;
}
bzero((caddr_t)newmsg, len);
bcopy((caddr_t)mhp[0], (caddr_t)newmsg, sizeof(*msg0));
newmsg->sadb_msg_errno = 0;
newmsg->sadb_msg_len = PFKEY_UNIT64(len);
return newmsg;
}
}
/*
* SADB_DUMP processing
* dump all entries including status of DEAD in SAD.
* receive
* <base>
* from the ikmpd, and dump all secasvar leaves
* and send,
* <base> .....
* to the ikmpd.
*
* IN: mhp: pointer to the pointer to each header.
* OUT: error code. 0 on success.
*/
static int
key_dump(mhp, so, target)
caddr_t *mhp;
struct socket *so;
int target;
{
struct sadb_msg *msg0;
struct secashead *sah;
struct secasvar *sav;
u_int16_t proto;
u_int stateidx;
u_int8_t satype;
u_int8_t state;
int len, cnt;
struct sadb_msg *newmsg;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_dump: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
/* map satype to proto */
if ((proto = key_satype2proto(msg0->sadb_msg_satype)) == 0) {
printf("key_dump: invalid satype is passed.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
/* count sav entries to be sent to the userland. */
cnt = 0;
__LIST_FOREACH(sah, &sahtree, chain) {
if (msg0->sadb_msg_satype != SADB_SATYPE_UNSPEC
&& proto != sah->saidx.proto)
continue;
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_any);
stateidx++) {
state = saorder_state_any[stateidx];
__LIST_FOREACH(sav, &sah->savtree[state], chain) {
cnt++;
}
}
}
if (cnt == 0)
return ENOENT;
/* send this to the userland, one at a time. */
newmsg = NULL;
__LIST_FOREACH(sah, &sahtree, chain) {
if (msg0->sadb_msg_satype != SADB_SATYPE_UNSPEC
&& proto != sah->saidx.proto)
continue;
/* map proto to satype */
if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
printf("key_dump: there was invalid proto in SAD.\n");
msg0->sadb_msg_errno = EINVAL;
return NULL;
}
for (stateidx = 0;
stateidx < _ARRAYLEN(saorder_state_any);
stateidx++) {
state = saorder_state_any[stateidx];
__LIST_FOREACH(sav, &sah->savtree[state], chain) {
len = key_getmsglen(sav);
KMALLOC(newmsg, struct sadb_msg *, len);
if (newmsg == NULL) {
printf("key_dump: No more memory.\n");
return ENOBUFS;
}
bzero((caddr_t)newmsg, len);
--cnt;
(void)key_setdumpsa(newmsg, sav, SADB_DUMP,
satype, cnt, msg0->sadb_msg_pid);
key_sendup(so, newmsg, len, target);
KFREE(newmsg);
newmsg = NULL;
}
}
}
return 0;
}
/*
* SADB_X_PROMISC processing
*/
static void
key_promisc(mhp, so)
caddr_t *mhp;
struct socket *so;
{
struct sadb_msg *msg0;
int olen;
/* sanity check */
if (mhp == NULL || mhp[0] == NULL)
panic("key_promisc: NULL pointer is passed.\n");
msg0 = (struct sadb_msg *)mhp[0];
olen = PFKEY_UNUNIT64(msg0->sadb_msg_len);
if (olen < sizeof(struct sadb_msg)) {
return;
} else if (olen == sizeof(struct sadb_msg)) {
/* enable/disable promisc mode */
struct keycb *kp;
int target = 0;
target = KEY_SENDUP_ONE;
if (so == NULL) {
return;
}
if ((kp = (struct keycb *)sotorawcb(so)) == NULL) {
msg0->sadb_msg_errno = EINVAL;
goto sendorig;
}
msg0->sadb_msg_errno = 0;
if (msg0->sadb_msg_satype == 1 || msg0->sadb_msg_satype == 0) {
kp->kp_promisc = msg0->sadb_msg_satype;
} else {
msg0->sadb_msg_errno = EINVAL;
goto sendorig;
}
/* send the original message back to everyone */
msg0->sadb_msg_errno = 0;
target = KEY_SENDUP_ALL;
sendorig:
key_sendup(so, msg0, PFKEY_UNUNIT64(msg0->sadb_msg_len), target);
} else {
/* send packet as is */
struct sadb_msg *msg;
int len;
len = olen - sizeof(struct sadb_msg);
KMALLOC(msg, struct sadb_msg *, len);
if (msg == NULL) {
msg0->sadb_msg_errno = ENOBUFS;
key_sendup(so, msg0, PFKEY_UNUNIT64(msg0->sadb_msg_len),
KEY_SENDUP_ONE); /*XXX*/
}
/* XXX if sadb_msg_seq is specified, send to specific pid */
key_sendup(so, msg, len, KEY_SENDUP_ALL);
KFREE(msg);
}
}
/*
* send message to the socket.
* OUT:
* 0 : success
* others : fail
*/
static int
key_sendall(msg, len)
struct sadb_msg *msg;
u_int len;
{
struct secreg *reg;
int error = 0;
/* sanity check */
if (msg == NULL)
panic("key_sendall: NULL pointer is passed.\n");
/* search table registerd socket to send a message. */
__LIST_FOREACH(reg, &regtree[msg->sadb_msg_satype], chain) {
error = key_sendup(reg->so, msg, len, KEY_SENDUP_ONE);
if (error != 0) {
if (error == ENOBUFS)
printf("key_sendall: No more memory.\n");
else {
printf("key_sendall: key_sendup returned %d\n",
error);
}
KFREE(msg);
return error;
}
}
KFREE(msg);
return 0;
}
/*
* parse sadb_msg buffer to process PFKEYv2,
* and create a data to response if needed.
* I think to be dealed with mbuf directly.
* IN:
* msgp : pointer to pointer to a received buffer pulluped.
* This is rewrited to response.
* so : pointer to socket.
* OUT:
* length for buffer to send to user process.
*/
int
key_parse(msgp, so, targetp)
struct sadb_msg **msgp;
struct socket *so;
int *targetp;
{
struct sadb_msg *msg = *msgp, *newmsg = NULL;
caddr_t mhp[SADB_EXT_MAX + 1];
u_int orglen;
int error;
/* sanity check */
if (msg == NULL || so == NULL)
panic("key_parse: NULL pointer is passed.\n");
KEYDEBUG(KEYDEBUG_KEY_DUMP,
printf("key_parse: passed sadb_msg\n");
kdebug_sadb(msg));
orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
if (targetp)
*targetp = KEY_SENDUP_ONE;
/* check version */
if (msg->sadb_msg_version != PF_KEY_V2) {
printf("key_parse: PF_KEY version %u is mismatched.\n",
msg->sadb_msg_version);
return EINVAL;
}
/* check type */
if (msg->sadb_msg_type > SADB_MAX) {
printf("key_parse: invalid type %u is passed.\n",
msg->sadb_msg_type);
msg->sadb_msg_errno = EINVAL;
return orglen;
}
/* align message. */
if (key_align(msg, mhp) != 0) {
msg->sadb_msg_errno = EINVAL;
return orglen;
}
/* check SA type */
switch (msg->sadb_msg_satype) {
case SADB_SATYPE_UNSPEC:
switch (msg->sadb_msg_type) {
case SADB_GETSPI:
case SADB_UPDATE:
case SADB_ADD:
case SADB_DELETE:
case SADB_GET:
case SADB_ACQUIRE:
case SADB_EXPIRE:
printf("key_parse: must specify satype "
"when msg type=%u.\n",
msg->sadb_msg_type);
msg->sadb_msg_errno = EINVAL;
return orglen;
}
break;
case SADB_SATYPE_AH:
case SADB_SATYPE_ESP:
switch (msg->sadb_msg_type) {
case SADB_X_SPDADD:
case SADB_X_SPDDELETE:
case SADB_X_SPDGET:
case SADB_X_SPDDUMP:
case SADB_X_SPDFLUSH:
printf("key_parse: illegal satype=%u\n", msg->sadb_msg_type);
msg->sadb_msg_errno = EINVAL;
return orglen;
}
break;
case SADB_SATYPE_RSVP:
case SADB_SATYPE_OSPFV2:
case SADB_SATYPE_RIPV2:
case SADB_SATYPE_MIP:
printf("key_parse: type %u isn't supported.\n",
msg->sadb_msg_satype);
msg->sadb_msg_errno = EOPNOTSUPP;
return orglen;
case 1: /* XXX: What does it do ? */
if (msg->sadb_msg_type == SADB_X_PROMISC)
break;
/*FALLTHROUGH*/
default:
printf("key_parse: invalid type %u is passed.\n",
msg->sadb_msg_satype);
msg->sadb_msg_errno = EINVAL;
return orglen;
}
/* check field of upper layer protocol and address family */
if (mhp[SADB_EXT_ADDRESS_SRC] != NULL
&& mhp[SADB_EXT_ADDRESS_DST] != NULL) {
struct sadb_address *src0, *dst0;
u_int prefix;
src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]);
dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]);
/* check upper layer protocol */
if (src0->sadb_address_proto != dst0->sadb_address_proto) {
printf("key_parse: upper layer protocol mismatched.\n");
msg->sadb_msg_errno = EINVAL;
return orglen;
}
/* check family */
if (PFKEY_ADDR_SADDR(src0)->sa_family
!= PFKEY_ADDR_SADDR(dst0)->sa_family) {
printf("key_parse: address family mismatched.\n");
msg->sadb_msg_errno = EINVAL;
return orglen;
}
prefix = _INALENBYAF(PFKEY_ADDR_SADDR(src0)->sa_family) << 3;
/* check max prefixlen */
if (prefix < src0->sadb_address_prefixlen
|| prefix < dst0->sadb_address_prefixlen) {
printf("key_parse: illegal prefixlen.\n");
msg->sadb_msg_errno = EINVAL;
return orglen;
}
switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
case AF_INET:
case AF_INET6:
break;
default:
printf("key_parse: invalid address family.\n");
msg->sadb_msg_errno = EINVAL;
return orglen;
}
/*
* prefixlen == 0 is valid because there can be a case when
* all addresses are matched.
*/
}
switch (msg->sadb_msg_type) {
case SADB_GETSPI:
if ((newmsg = key_getspi(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_UPDATE:
if ((newmsg = key_update(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_ADD:
if ((newmsg = key_add(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_DELETE:
if ((newmsg = key_delete(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_GET:
if ((newmsg = key_get(mhp)) == NULL)
return orglen;
break;
case SADB_ACQUIRE:
if ((newmsg = key_acquire2(mhp)) == NULL)
return orglen;
if (newmsg == (struct sadb_msg *)~0) {
/*
* It's not need to reply because of the message
* that was reporting an error occured from the KMd.
*/
KFREE(msg);
return 0;
}
break;
case SADB_REGISTER:
if ((newmsg = key_register(mhp, so)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_REGISTERED;
break;
case SADB_EXPIRE:
printf("key_parse: why is SADB_EXPIRE received ?\n");
msg->sadb_msg_errno = EINVAL;
if (targetp)
*targetp = KEY_SENDUP_ALL;
return orglen;
case SADB_FLUSH:
if ((newmsg = key_flush(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_DUMP:
/* key_dump will call key_sendup() on her own */
error = key_dump(mhp, so, KEY_SENDUP_ONE);
if (error) {
msg->sadb_msg_errno = error;
return orglen;
} else {
KFREE(msg);
return 0;
}
break;
case SADB_X_PROMISC:
/* everything is handled in key_promisc() */
key_promisc(mhp, so);
KFREE(msg);
return 0; /*nothing to reply*/
case SADB_X_PCHANGE:
printf("key_parse: SADB_X_PCHANGE isn't supported.\n");
msg->sadb_msg_errno = EINVAL;
return orglen;
case SADB_X_SPDADD:
if ((newmsg = key_spdadd(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_X_SPDDELETE:
if ((newmsg = key_spddelete(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
case SADB_X_SPDDUMP:
/* key_spddump will call key_sendup() on her own */
error = key_spddump(mhp, so, KEY_SENDUP_ONE);
if (error) {
msg->sadb_msg_errno = error;
return orglen;
} else {
KFREE(msg);
return 0;
}
break;
case SADB_X_SPDFLUSH:
if ((newmsg = key_spdflush(mhp)) == NULL)
return orglen;
if (targetp)
*targetp = KEY_SENDUP_ALL;
break;
default:
msg->sadb_msg_errno = EOPNOTSUPP;
return orglen;
}
/* switch from old sadb_msg to new one if success. */
KFREE(msg);
*msgp = newmsg;
return PFKEY_UNUNIT64((*msgp)->sadb_msg_len);
}
/*
* set the pointer to each header into message buffer.
* IN: msg: pointer to message buffer.
* mhp: pointer to the buffer allocated like below:
* caddr_t mhp[SADB_EXT_MAX + 1];
* OUT: 0:
* EINVAL:
*/
static int
key_align(msg, mhp)
struct sadb_msg *msg;
caddr_t *mhp;
{
struct sadb_ext *ext;
int tlen, extlen;
int i;
/* sanity check */
if (msg == NULL || mhp == NULL)
panic("key_align: NULL pointer is passed.\n");
/* initialize */
for (i = 0; i < SADB_EXT_MAX + 1; i++)
mhp[i] = NULL;
mhp[0] = (caddr_t)msg;
tlen = PFKEY_UNUNIT64(msg->sadb_msg_len) - sizeof(struct sadb_msg);
ext = (struct sadb_ext *)((caddr_t)msg + sizeof(struct sadb_msg));
while (tlen > 0) {
/* duplicate check */
/* XXX Are there duplication either KEY_AUTH or KEY_ENCRYPT ?*/
if (mhp[ext->sadb_ext_type] != NULL) {
printf("key_align: duplicate ext_type %u is passed.\n",
ext->sadb_ext_type);
return EINVAL;
}
/* set pointer */
switch (ext->sadb_ext_type) {
case SADB_EXT_SA:
case SADB_EXT_LIFETIME_CURRENT:
case SADB_EXT_LIFETIME_HARD:
case SADB_EXT_LIFETIME_SOFT:
case SADB_EXT_ADDRESS_SRC:
case SADB_EXT_ADDRESS_DST:
case SADB_EXT_ADDRESS_PROXY:
case SADB_EXT_KEY_AUTH:
/* must to be chek weak keys. */
case SADB_EXT_KEY_ENCRYPT:
/* must to be chek weak keys. */
case SADB_EXT_IDENTITY_SRC:
case SADB_EXT_IDENTITY_DST:
case SADB_EXT_SENSITIVITY:
case SADB_EXT_PROPOSAL:
case SADB_EXT_SUPPORTED_AUTH:
case SADB_EXT_SUPPORTED_ENCRYPT:
case SADB_EXT_SPIRANGE:
case SADB_X_EXT_POLICY:
mhp[ext->sadb_ext_type] = (caddr_t)ext;
break;
default:
printf("key_align: invalid ext_type %u is passed.\n",
ext->sadb_ext_type);
return EINVAL;
}
extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
tlen -= extlen;
ext = (struct sadb_ext *)((caddr_t)ext + extlen);
}
return 0;
}
void
key_init()
{
int i;
bzero((caddr_t)&key_cb, sizeof(key_cb));
for (i = 0; i < IPSEC_DIR_MAX; i++) {
LIST_INIT(&sptree[i]);
}
LIST_INIT(&sahtree);
for (i = 0; i <= SADB_SATYPE_MAX; i++) {
LIST_INIT(&regtree[i]);
}
#ifndef IPSEC_NONBLOCK_ACQUIRE
LIST_INIT(&acqtree);
#endif
/* system default */
ip4_def_policy.policy = IPSEC_POLICY_NONE;
ip4_def_policy.refcnt++; /*never reclaim this*/
#ifdef INET6
ip6_def_policy.policy = IPSEC_POLICY_NONE;
ip6_def_policy.refcnt++; /*never reclaim this*/
#endif
#ifndef IPSEC_DEBUG2
timeout((void *)key_timehandler, (void *)0, 100);
#endif /*IPSEC_DEBUG2*/
/* initialize key statistics */
keystat.getspi_count = 1;
printf("IPsec: Initialized Security Association Processing.\n");
return;
}
/*
* XXX: maybe This function is called after INBOUND IPsec processing.
*
* Special check for tunnel-mode packets.
* We must make some checks for consistency between inner and outer IP header.
*
* xxx more checks to be provided
*/
int
key_checktunnelsanity(sav, family, src, dst)
struct secasvar *sav;
u_int family;
caddr_t src;
caddr_t dst;
{
/* sanity check */
if (sav->sah == NULL)
panic("sav->sah == NULL at key_checktunnelsanity");
/* XXX: check inner IP header */
return 1;
}
#if 0
#ifdef __FreeBSD__
#define hostnamelen strlen(hostname)
#endif
/*
* Get FQDN for the host.
* If the administrator configured hostname (by hostname(1)) without
* domain name, returns nothing.
*/
static const char *
key_getfqdn()
{
int i;
int hasdot;
static char fqdn[MAXHOSTNAMELEN + 1];
if (!hostnamelen)
return NULL;
/* check if it comes with domain name. */
hasdot = 0;
for (i = 0; i < hostnamelen; i++) {
if (hostname[i] == '.')
hasdot++;
}
if (!hasdot)
return NULL;
/* NOTE: hostname may not be NUL-terminated. */
bzero(fqdn, sizeof(fqdn));
bcopy(hostname, fqdn, hostnamelen);
fqdn[hostnamelen] = '\0';
return fqdn;
}
/*
* get username@FQDN for the host/user.
*/
static const char *
key_getuserfqdn()
{
const char *host;
static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
struct proc *p = curproc;
char *q;
if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
return NULL;
if (!(host = key_getfqdn()))
return NULL;
/* NOTE: s_login may not be-NUL terminated. */
bzero(userfqdn, sizeof(userfqdn));
bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME);
userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
q = userfqdn + strlen(userfqdn);
*q++ = '@';
bcopy(host, q, strlen(host));
q += strlen(host);
*q++ = '\0';
return userfqdn;
}
#endif
/* record data transfer on SA, and update timestamps */
void
key_sa_recordxfer(sav, m)
struct secasvar *sav;
struct mbuf *m;
{
if (!sav)
panic("key_sa_recordxfer called with sav == NULL");
if (!m)
panic("key_sa_recordxfer called with m == NULL");
if (!sav->lft_c)
return;
sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
/* to check bytes lifetime is done in key_timehandler(). */
/*
* We use the number of packets as the unit of
* sadb_lifetime_allocations. We increment the variable
* whenever {esp,ah}_{in,out}put is called.
*/
sav->lft_c->sadb_lifetime_allocations++;
/* XXX check for expires? */
/*
* NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
* in seconds. HARD and SOFT lifetime are measured by the time
* difference (again in seconds) from sadb_lifetime_usetime.
*
* usetime
* v expire expire
* -----+-----+--------+---> t
* <--------------> HARD
* <-----> SOFT
*/
{
struct timeval tv;
microtime(&tv);
sav->lft_c->sadb_lifetime_usetime = tv.tv_sec;
/* XXX check for expires? */
}
return;
}
/* dumb version */
void
key_sa_routechange(dst)
struct sockaddr *dst;
{
struct secashead *sah;
struct route *ro;
__LIST_FOREACH(sah, &sahtree, chain) {
ro = &sah->sa_route;
if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
&& bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
RTFREE(ro->ro_rt);
ro->ro_rt = (struct rtentry *)NULL;
}
}
return;
}
static void
key_sa_chgstate(sav, state)
struct secasvar *sav;
u_int8_t state;
{
if (sav == NULL)
panic("key_sa_chgstate called with sav == NULL");
if (sav->state == state)
return;
if (__LIST_CHAINED(sav))
LIST_REMOVE(sav, chain);
sav->state = state;
LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
}
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