/* $NetBSD: handler.c,v 1.39 2011/03/14 17:18:12 tteras Exp $ */
/* Id: handler.c,v 1.28 2006/05/26 12:17:29 manubsd Exp */
/*
* 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.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "sockmisc.h"
#include "debug.h"
#ifdef ENABLE_HYBRID
#include <resolv.h>
#endif
#include "schedule.h"
#include "grabmyaddr.h"
#include "algorithm.h"
#include "crypto_openssl.h"
#include "policy.h"
#include "proposal.h"
#include "isakmp_var.h"
#include "evt.h"
#include "isakmp.h"
#ifdef ENABLE_HYBRID
#include "isakmp_xauth.h"
#include "isakmp_cfg.h"
#endif
#include "isakmp_inf.h"
#include "oakley.h"
#include "remoteconf.h"
#include "localconf.h"
#include "handler.h"
#include "gcmalloc.h"
#include "nattraversal.h"
#include "sainfo.h"
#ifdef HAVE_GSSAPI
#include "gssapi.h"
#endif
static LIST_HEAD(_ph1tree_, ph1handle) ph1tree;
static LIST_HEAD(_ph2tree_, ph2handle) ph2tree;
static LIST_HEAD(_ctdtree_, contacted) ctdtree;
static LIST_HEAD(_rcptree_, recvdpkt) rcptree;
static struct sched sc_sweep = SCHED_INITIALIZER();
static void del_recvdpkt __P((struct recvdpkt *));
static void rem_recvdpkt __P((struct recvdpkt *));
/*
* functions about management of the isakmp status table
*/
/* %%% management phase 1 handler */
/*
* search for isakmpsa handler with isakmp index.
*/
extern caddr_t val2str(const char *, size_t);
/*
* Enumerate the Phase 1 tree.
* If enum_func() internally return a non-zero value, this specific
* error value is returned. 0 is returned if everything went right.
*
* Note that it is ok for enum_func() to call insph1(). Those inserted
* Phase 1 will not interfere with current enumeration process.
*/
int
enumph1(sel, enum_func, enum_arg)
struct ph1selector *sel;
int (* enum_func)(struct ph1handle *iph1, void *arg);
void *enum_arg;
{
struct ph1handle *p;
int ret;
LIST_FOREACH(p, &ph1tree, chain) {
if (sel != NULL) {
if (sel->local != NULL &&
cmpsaddr(sel->local, p->local) > CMPSADDR_WILDPORT_MATCH)
continue;
if (sel->remote != NULL &&
cmpsaddr(sel->remote, p->remote) > CMPSADDR_WILDPORT_MATCH)
continue;
}
if ((ret = enum_func(p, enum_arg)) != 0)
return ret;
}
return 0;
}
struct ph1handle *
getph1byindex(index)
isakmp_index *index;
{
struct ph1handle *p;
LIST_FOREACH(p, &ph1tree, chain) {
if (p->status >= PHASE1ST_EXPIRED)
continue;
if (memcmp(&p->index, index, sizeof(*index)) == 0)
return p;
}
return NULL;
}
/*
* search for isakmp handler by i_ck in index.
*/
struct ph1handle *
getph1byindex0(index)
isakmp_index *index;
{
struct ph1handle *p;
LIST_FOREACH(p, &ph1tree, chain) {
if (p->status >= PHASE1ST_EXPIRED)
continue;
if (memcmp(&p->index, index, sizeof(cookie_t)) == 0)
return p;
}
return NULL;
}
/*
* search for isakmpsa handler by source and remote address.
* don't use port number to search because this function search
* with phase 2's destinaion.
*/
struct ph1handle *
getph1(ph1hint, local, remote, flags)
struct ph1handle *ph1hint;
struct sockaddr *local, *remote;
int flags;
{
struct ph1handle *p;
plog(LLV_DEBUG2, LOCATION, NULL, "getph1: start\n");
plog(LLV_DEBUG2, LOCATION, NULL, "local: %s\n", saddr2str(local));
plog(LLV_DEBUG2, LOCATION, NULL, "remote: %s\n", saddr2str(remote));
LIST_FOREACH(p, &ph1tree, chain) {
if (p->status >= PHASE1ST_DYING)
continue;
plog(LLV_DEBUG2, LOCATION, NULL, "p->local: %s\n", saddr2str(p->local));
plog(LLV_DEBUG2, LOCATION, NULL, "p->remote: %s\n", saddr2str(p->remote));
if ((flags & GETPH1_F_ESTABLISHED) &&
(p->status != PHASE1ST_ESTABLISHED)) {
plog(LLV_DEBUG2, LOCATION, NULL,
"status %d, skipping\n", p->status);
continue;
}
if (local != NULL && cmpsaddr(local, p->local) == CMPSADDR_MISMATCH)
continue;
if (remote != NULL && cmpsaddr(remote, p->remote) == CMPSADDR_MISMATCH)
continue;
if (ph1hint != NULL) {
if (ph1hint->id && ph1hint->id->l && p->id && p->id->l &&
(ph1hint->id->l != p->id->l ||
memcmp(ph1hint->id->v, p->id->v, p->id->l) != 0)) {
plog(LLV_DEBUG2, LOCATION, NULL,
"local identity does match hint\n");
continue;
}
if (ph1hint->id_p && ph1hint->id_p->l &&
p->id_p && p->id_p->l &&
(ph1hint->id_p->l != p->id_p->l ||
memcmp(ph1hint->id_p->v, p->id_p->v, p->id_p->l) != 0)) {
plog(LLV_DEBUG2, LOCATION, NULL,
"remote identity does match hint\n");
continue;
}
}
plog(LLV_DEBUG2, LOCATION, NULL, "matched\n");
return p;
}
plog(LLV_DEBUG2, LOCATION, NULL, "no match\n");
return NULL;
}
int
resolveph1rmconf(iph1)
struct ph1handle *iph1;
{
struct remoteconf *rmconf;
/* INITIATOR is always expected to know the exact rmconf. */
if (iph1->side == INITIATOR)
return 0;
rmconf = getrmconf_by_ph1(iph1);
if (rmconf == NULL)
return -1;
if (rmconf == RMCONF_ERR_MULTIPLE)
return 1;
if (iph1->rmconf != NULL) {
if (rmconf != iph1->rmconf) {
plog(LLV_ERROR, LOCATION, NULL,
"unexpected rmconf switch; killing ph1\n");
return -1;
}
} else {
iph1->rmconf = rmconf;
}
return 0;
}
/*
* move phase2s from old_iph1 to new_iph1
*/
void
migrate_ph12(old_iph1, new_iph1)
struct ph1handle *old_iph1, *new_iph1;
{
struct ph2handle *p, *next;
/* Relocate phase2s to better phase1s or request a new phase1. */
for (p = LIST_FIRST(&old_iph1->ph2tree); p; p = next) {
next = LIST_NEXT(p, ph1bind);
if (p->status != PHASE2ST_ESTABLISHED)
continue;
unbindph12(p);
bindph12(new_iph1, p);
}
}
/*
* the iph1 is new, migrate all phase2s that belong to a dying or dead ph1
*/
void migrate_dying_ph12(iph1)
struct ph1handle *iph1;
{
struct ph1handle *p;
LIST_FOREACH(p, &ph1tree, chain) {
if (p == iph1)
continue;
if (p->status < PHASE1ST_DYING)
continue;
if (cmpsaddr(iph1->local, p->local) == CMPSADDR_MATCH
&& cmpsaddr(iph1->remote, p->remote) == CMPSADDR_MATCH)
migrate_ph12(p, iph1);
}
}
/*
* dump isakmp-sa
*/
vchar_t *
dumpph1()
{
struct ph1handle *iph1;
struct ph1dump *pd;
int cnt = 0;
vchar_t *buf;
/* get length of buffer */
LIST_FOREACH(iph1, &ph1tree, chain)
cnt++;
buf = vmalloc(cnt * sizeof(struct ph1dump));
if (buf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer\n");
return NULL;
}
pd = (struct ph1dump *)buf->v;
LIST_FOREACH(iph1, &ph1tree, chain) {
memcpy(&pd->index, &iph1->index, sizeof(iph1->index));
pd->status = iph1->status;
pd->side = iph1->side;
memcpy(&pd->remote, iph1->remote, sysdep_sa_len(iph1->remote));
memcpy(&pd->local, iph1->local, sysdep_sa_len(iph1->local));
pd->version = iph1->version;
pd->etype = iph1->etype;
pd->created = iph1->created;
pd->ph2cnt = iph1->ph2cnt;
pd++;
}
return buf;
}
/*
* create new isakmp Phase 1 status record to handle isakmp in Phase1
*/
struct ph1handle *
newph1()
{
struct ph1handle *iph1;
/* create new iph1 */
iph1 = racoon_calloc(1, sizeof(*iph1));
if (iph1 == NULL)
return NULL;
iph1->status = PHASE1ST_SPAWN;
#ifdef ENABLE_DPD
iph1->dpd_support = 0;
iph1->dpd_seq = 0;
iph1->dpd_fails = 0;
#endif
evt_list_init(&iph1->evt_listeners);
return iph1;
}
/*
* delete new isakmp Phase 1 status record to handle isakmp in Phase1
*/
void
delph1(iph1)
struct ph1handle *iph1;
{
if (iph1 == NULL)
return;
/* SA down shell script hook */
script_hook(iph1, SCRIPT_PHASE1_DOWN);
evt_list_cleanup(&iph1->evt_listeners);
#ifdef ENABLE_NATT
if (iph1->natt_flags & NAT_KA_QUEUED)
natt_keepalive_remove (iph1->local, iph1->remote);
if (iph1->natt_options) {
racoon_free(iph1->natt_options);
iph1->natt_options = NULL;
}
#endif
#ifdef ENABLE_HYBRID
if (iph1->mode_cfg)
isakmp_cfg_rmstate(iph1);
#endif
#ifdef ENABLE_DPD
sched_cancel(&iph1->dpd_r_u);
#endif
sched_cancel(&iph1->sce);
sched_cancel(&iph1->scr);
if (iph1->remote) {
racoon_free(iph1->remote);
iph1->remote = NULL;
}
if (iph1->local) {
racoon_free(iph1->local);
iph1->local = NULL;
}
if (iph1->approval) {
delisakmpsa(iph1->approval);
iph1->approval = NULL;
}
VPTRINIT(iph1->authstr);
VPTRINIT(iph1->sendbuf);
VPTRINIT(iph1->dhpriv);
VPTRINIT(iph1->dhpub);
VPTRINIT(iph1->dhpub_p);
VPTRINIT(iph1->dhgxy);
VPTRINIT(iph1->nonce);
VPTRINIT(iph1->nonce_p);
VPTRINIT(iph1->skeyid);
VPTRINIT(iph1->skeyid_d);
VPTRINIT(iph1->skeyid_a);
VPTRINIT(iph1->skeyid_e);
VPTRINIT(iph1->key);
VPTRINIT(iph1->hash);
VPTRINIT(iph1->sig);
VPTRINIT(iph1->sig_p);
VPTRINIT(iph1->cert);
VPTRINIT(iph1->cert_p);
VPTRINIT(iph1->crl_p);
VPTRINIT(iph1->cr_p);
VPTRINIT(iph1->id);
VPTRINIT(iph1->id_p);
if(iph1->approval != NULL)
delisakmpsa(iph1->approval);
if (iph1->ivm) {
oakley_delivm(iph1->ivm);
iph1->ivm = NULL;
}
VPTRINIT(iph1->sa);
VPTRINIT(iph1->sa_ret);
#ifdef HAVE_GSSAPI
VPTRINIT(iph1->gi_i);
VPTRINIT(iph1->gi_r);
gssapi_free_state(iph1);
#endif
racoon_free(iph1);
}
/*
* create new isakmp Phase 1 status record to handle isakmp in Phase1
*/
int
insph1(iph1)
struct ph1handle *iph1;
{
/* validity check */
if (iph1->remote == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"invalid isakmp SA handler. no remote address.\n");
return -1;
}
LIST_INSERT_HEAD(&ph1tree, iph1, chain);
return 0;
}
void
remph1(iph1)
struct ph1handle *iph1;
{
LIST_REMOVE(iph1, chain);
}
/*
* flush isakmp-sa
*/
void
flushph1()
{
struct ph1handle *p, *next;
for (p = LIST_FIRST(&ph1tree); p; p = next) {
next = LIST_NEXT(p, chain);
/* send delete information */
if (p->status >= PHASE1ST_ESTABLISHED)
isakmp_info_send_d1(p);
remph1(p);
delph1(p);
}
}
void
initph1tree()
{
LIST_INIT(&ph1tree);
}
int
ph1_rekey_enabled(iph1)
struct ph1handle *iph1;
{
if (iph1->rmconf == NULL)
return 0;
if (iph1->rmconf->rekey == REKEY_FORCE)
return 1;
#ifdef ENABLE_DPD
if (iph1->rmconf->rekey == REKEY_ON && iph1->dpd_support &&
iph1->rmconf->dpd_interval)
return 1;
#endif
return 0;
}
/* %%% management phase 2 handler */
int
enumph2(sel, enum_func, enum_arg)
struct ph2selector *sel;
int (*enum_func)(struct ph2handle *ph2, void *arg);
void *enum_arg;
{
struct ph2handle *p;
int ret;
LIST_FOREACH(p, &ph2tree, chain) {
if (sel != NULL) {
if (sel->spid != 0 && sel->spid != p->spid)
continue;
if (sel->src != NULL &&
cmpsaddr(sel->src, p->src) != CMPSADDR_MATCH)
continue;
if (sel->dst != NULL &&
cmpsaddr(sel->dst, p->dst) != CMPSADDR_MATCH)
continue;
}
if ((ret = enum_func(p, enum_arg)) != 0)
return ret;
}
return 0;
}
/*
* search ph2handle with sequence number.
*/
struct ph2handle *
getph2byseq(seq)
u_int32_t seq;
{
struct ph2handle *p;
LIST_FOREACH(p, &ph2tree, chain) {
if (p->seq == seq)
return p;
}
return NULL;
}
/*
* search ph2handle with message id.
*/
struct ph2handle *
getph2bymsgid(iph1, msgid)
struct ph1handle *iph1;
u_int32_t msgid;
{
struct ph2handle *p;
LIST_FOREACH(p, &iph1->ph2tree, ph1bind) {
if (p->msgid == msgid && p->ph1 == iph1)
return p;
}
return NULL;
}
/* Note that src and dst are not the selectors of the SP
* but the source and destination addresses used for
* for SA negotiation (best example is tunnel mode SA
* where src and dst are the endpoints). There is at most
* a unique match because racoon does not support bundles
* which makes that there is at most a single established
* SA for a given spid. One could say that src and dst
* are in fact useless ...
*/
struct ph2handle *
getph2byid(src, dst, spid)
struct sockaddr *src, *dst;
u_int32_t spid;
{
struct ph2handle *p;
LIST_FOREACH(p, &ph2tree, chain) {
if (spid == p->spid &&
cmpsaddr(src, p->src) <= CMPSADDR_WILDPORT_MATCH &&
cmpsaddr(dst, p->dst) <= CMPSADDR_WILDPORT_MATCH){
/* Sanity check to detect zombie handlers
* XXX Sould be done "somewhere" more interesting,
* because we have lots of getph2byxxxx(), but this one
* is called by pk_recvacquire(), so is the most important.
*/
if(p->status < PHASE2ST_ESTABLISHED &&
p->retry_counter == 0
&& p->sce.func == NULL && p->scr.func == NULL) {
plog(LLV_DEBUG, LOCATION, NULL,
"Zombie ph2 found, expiring it\n");
isakmp_ph2expire(p);
}else
return p;
}
}
return NULL;
}
struct ph2handle *
getph2bysaddr(src, dst)
struct sockaddr *src, *dst;
{
struct ph2handle *p;
LIST_FOREACH(p, &ph2tree, chain) {
if (cmpsaddr(src, p->src) <= CMPSADDR_WILDPORT_MATCH &&
cmpsaddr(dst, p->dst) <= CMPSADDR_WILDPORT_MATCH)
return p;
}
return NULL;
}
/*
* call by pk_recvexpire().
*/
struct ph2handle *
getph2bysaidx(src, dst, proto_id, spi)
struct sockaddr *src, *dst;
u_int proto_id;
u_int32_t spi;
{
struct ph2handle *iph2;
struct saproto *pr;
LIST_FOREACH(iph2, &ph2tree, chain) {
if (iph2->proposal == NULL && iph2->approval == NULL)
continue;
if (iph2->approval != NULL) {
for (pr = iph2->approval->head; pr != NULL;
pr = pr->next) {
if (proto_id != pr->proto_id)
break;
if (spi == pr->spi || spi == pr->spi_p)
return iph2;
}
} else if (iph2->proposal != NULL) {
for (pr = iph2->proposal->head; pr != NULL;
pr = pr->next) {
if (proto_id != pr->proto_id)
break;
if (spi == pr->spi)
return iph2;
}
}
}
return NULL;
}
/*
* create new isakmp Phase 2 status record to handle isakmp in Phase2
*/
struct ph2handle *
newph2()
{
struct ph2handle *iph2 = NULL;
/* create new iph2 */
iph2 = racoon_calloc(1, sizeof(*iph2));
if (iph2 == NULL)
return NULL;
iph2->status = PHASE1ST_SPAWN;
evt_list_init(&iph2->evt_listeners);
return iph2;
}
/*
* initialize ph2handle
* NOTE: don't initialize src/dst.
* SPI in the proposal is cleared.
*/
void
initph2(iph2)
struct ph2handle *iph2;
{
evt_list_cleanup(&iph2->evt_listeners);
unbindph12(iph2);
sched_cancel(&iph2->sce);
sched_cancel(&iph2->scr);
VPTRINIT(iph2->sendbuf);
VPTRINIT(iph2->msg1);
/* clear spi, keep variables in the proposal */
if (iph2->proposal) {
struct saproto *pr;
for (pr = iph2->proposal->head; pr != NULL; pr = pr->next)
pr->spi = 0;
}
/* clear approval */
if (iph2->approval) {
flushsaprop(iph2->approval);
iph2->approval = NULL;
}
/* clear the generated policy */
if (iph2->spidx_gen) {
delsp_bothdir((struct policyindex *)iph2->spidx_gen);
racoon_free(iph2->spidx_gen);
iph2->spidx_gen = NULL;
}
if (iph2->pfsgrp) {
oakley_dhgrp_free(iph2->pfsgrp);
iph2->pfsgrp = NULL;
}
VPTRINIT(iph2->dhpriv);
VPTRINIT(iph2->dhpub);
VPTRINIT(iph2->dhpub_p);
VPTRINIT(iph2->dhgxy);
VPTRINIT(iph2->id);
VPTRINIT(iph2->id_p);
VPTRINIT(iph2->nonce);
VPTRINIT(iph2->nonce_p);
VPTRINIT(iph2->sa);
VPTRINIT(iph2->sa_ret);
if (iph2->ivm) {
oakley_delivm(iph2->ivm);
iph2->ivm = NULL;
}
#ifdef ENABLE_NATT
if (iph2->natoa_src) {
racoon_free(iph2->natoa_src);
iph2->natoa_src = NULL;
}
if (iph2->natoa_dst) {
racoon_free(iph2->natoa_dst);
iph2->natoa_dst = NULL;
}
#endif
}
/*
* delete new isakmp Phase 2 status record to handle isakmp in Phase2
*/
void
delph2(iph2)
struct ph2handle *iph2;
{
initph2(iph2);
if (iph2->src) {
racoon_free(iph2->src);
iph2->src = NULL;
}
if (iph2->dst) {
racoon_free(iph2->dst);
iph2->dst = NULL;
}
if (iph2->sa_src) {
racoon_free(iph2->sa_src);
iph2->sa_src = NULL;
}
if (iph2->sa_dst) {
racoon_free(iph2->sa_dst);
iph2->sa_dst = NULL;
}
#ifdef ENABLE_NATT
if (iph2->natoa_src) {
racoon_free(iph2->natoa_src);
iph2->natoa_src = NULL;
}
if (iph2->natoa_dst) {
racoon_free(iph2->natoa_dst);
iph2->natoa_dst = NULL;
}
#endif
if (iph2->proposal) {
flushsaprop(iph2->proposal);
iph2->proposal = NULL;
}
racoon_free(iph2);
}
/*
* create new isakmp Phase 2 status record to handle isakmp in Phase2
*/
int
insph2(iph2)
struct ph2handle *iph2;
{
LIST_INSERT_HEAD(&ph2tree, iph2, chain);
return 0;
}
void
remph2(iph2)
struct ph2handle *iph2;
{
unbindph12(iph2);
LIST_REMOVE(iph2, chain);
}
void
initph2tree()
{
LIST_INIT(&ph2tree);
}
void
flushph2()
{
struct ph2handle *p, *next;
plog(LLV_DEBUG2, LOCATION, NULL,
"flushing all ph2 handlers...\n");
for (p = LIST_FIRST(&ph2tree); p; p = next) {
next = LIST_NEXT(p, chain);
/* send delete information */
if (p->status == PHASE2ST_ESTABLISHED){
plog(LLV_DEBUG2, LOCATION, NULL,
"got a ph2 handler to flush...\n");
isakmp_info_send_d2(p);
}else{
plog(LLV_DEBUG2, LOCATION, NULL,
"skipping ph2 handler (state %d)\n", p->status);
}
delete_spd(p, 0);
remph2(p);
delph2(p);
}
}
/*
* Delete all Phase 2 handlers for this src/dst/proto. This
* is used during INITIAL-CONTACT processing (so no need to
* send a message to the peer).
*/
void
deleteallph2(src, dst, proto_id)
struct sockaddr *src, *dst;
u_int proto_id;
{
struct ph2handle *iph2, *next;
struct saproto *pr;
for (iph2 = LIST_FIRST(&ph2tree); iph2 != NULL; iph2 = next) {
next = LIST_NEXT(iph2, chain);
if (iph2->proposal == NULL && iph2->approval == NULL)
continue;
if (iph2->approval != NULL) {
for (pr = iph2->approval->head; pr != NULL;
pr = pr->next) {
if (proto_id == pr->proto_id)
goto zap_it;
}
} else if (iph2->proposal != NULL) {
for (pr = iph2->proposal->head; pr != NULL;
pr = pr->next) {
if (proto_id == pr->proto_id)
goto zap_it;
}
}
continue;
zap_it:
remph2(iph2);
delph2(iph2);
}
}
/* %%% */
void
bindph12(iph1, iph2)
struct ph1handle *iph1;
struct ph2handle *iph2;
{
unbindph12(iph2);
iph2->ph1 = iph1;
iph1->ph2cnt++;
LIST_INSERT_HEAD(&iph1->ph2tree, iph2, ph1bind);
}
void
unbindph12(iph2)
struct ph2handle *iph2;
{
if (iph2->ph1 != NULL) {
LIST_REMOVE(iph2, ph1bind);
iph2->ph1->ph2cnt--;
iph2->ph1 = NULL;
}
}
/* %%% management contacted list */
/*
* search contacted list.
*/
struct contacted *
getcontacted(remote)
struct sockaddr *remote;
{
struct contacted *p;
LIST_FOREACH(p, &ctdtree, chain) {
if (cmpsaddr(remote, p->remote) <= CMPSADDR_WILDPORT_MATCH)
return p;
}
return NULL;
}
/*
* create new isakmp Phase 2 status record to handle isakmp in Phase2
*/
int
inscontacted(remote)
struct sockaddr *remote;
{
struct contacted *new;
/* create new iph2 */
new = racoon_calloc(1, sizeof(*new));
if (new == NULL)
return -1;
new->remote = dupsaddr(remote);
if (new->remote == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
racoon_free(new);
return -1;
}
LIST_INSERT_HEAD(&ctdtree, new, chain);
return 0;
}
void
remcontacted(remote)
struct sockaddr *remote;
{
struct contacted *p;
LIST_FOREACH(p, &ctdtree, chain) {
if (cmpsaddr(remote, p->remote) <= CMPSADDR_WILDPORT_MATCH) {
LIST_REMOVE(p, chain);
racoon_free(p->remote);
racoon_free(p);
break;
}
}
}
void
initctdtree()
{
LIST_INIT(&ctdtree);
}
/*
* check the response has been sent to the peer. when not, simply reply
* the buffered packet to the peer.
* OUT:
* 0: the packet is received at the first time.
* 1: the packet was processed before.
* 2: the packet was processed before, but the address mismatches.
* -1: error happened.
*/
int
check_recvdpkt(remote, local, rbuf)
struct sockaddr *remote, *local;
vchar_t *rbuf;
{
vchar_t *hash;
struct recvdpkt *r;
struct timeval now, diff;
int len, s;
hash = eay_md5_one(rbuf);
if (!hash) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
return -1;
}
LIST_FOREACH(r, &rcptree, chain) {
if (memcmp(hash->v, r->hash->v, r->hash->l) == 0)
break;
}
vfree(hash);
/* this is the first time to receive the packet */
if (r == NULL)
return 0;
/*
* the packet was processed before, but the remote address mismatches.
*/
if (cmpsaddr(remote, r->remote) != CMPSADDR_MATCH)
return 2;
/*
* it should not check the local address because the packet
* may arrive at other interface.
*/
/* check the previous time to send */
sched_get_monotonic_time(&now);
timersub(&now, &r->time_send, &diff);
if (diff.tv_sec == 0) {
plog(LLV_WARNING, LOCATION, NULL,
"the packet retransmitted in a short time from %s\n",
saddr2str(remote));
/*XXX should it be error ? */
}
/* select the socket to be sent */
s = myaddr_getfd(r->local);
if (s == -1)
return -1;
/* resend the packet if needed */
len = sendfromto(s, r->sendbuf->v, r->sendbuf->l,
r->local, r->remote, lcconf->count_persend);
if (len == -1) {
plog(LLV_ERROR, LOCATION, NULL, "sendfromto failed\n");
return -1;
}
/* check the retry counter */
r->retry_counter--;
if (r->retry_counter <= 0) {
rem_recvdpkt(r);
del_recvdpkt(r);
plog(LLV_DEBUG, LOCATION, NULL,
"deleted the retransmission packet to %s.\n",
saddr2str(remote));
} else
r->time_send = now;
return 1;
}
/*
* adding a hash of received packet into the received list.
*/
int
add_recvdpkt(remote, local, sbuf, rbuf)
struct sockaddr *remote, *local;
vchar_t *sbuf, *rbuf;
{
struct recvdpkt *new = NULL;
if (lcconf->retry_counter == 0) {
/* no need to add it */
return 0;
}
new = racoon_calloc(1, sizeof(*new));
if (!new) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
return -1;
}
new->hash = eay_md5_one(rbuf);
if (!new->hash) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
del_recvdpkt(new);
return -1;
}
new->remote = dupsaddr(remote);
if (new->remote == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
del_recvdpkt(new);
return -1;
}
new->local = dupsaddr(local);
if (new->local == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
del_recvdpkt(new);
return -1;
}
new->sendbuf = vdup(sbuf);
if (new->sendbuf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to allocate buffer.\n");
del_recvdpkt(new);
return -1;
}
new->retry_counter = lcconf->retry_counter;
sched_get_monotonic_time(&new->time_send);
LIST_INSERT_HEAD(&rcptree, new, chain);
return 0;
}
void
del_recvdpkt(r)
struct recvdpkt *r;
{
if (r->remote)
racoon_free(r->remote);
if (r->local)
racoon_free(r->local);
if (r->hash)
vfree(r->hash);
if (r->sendbuf)
vfree(r->sendbuf);
racoon_free(r);
}
void
rem_recvdpkt(r)
struct recvdpkt *r;
{
LIST_REMOVE(r, chain);
}
static void
sweep_recvdpkt(dummy)
struct sched *dummy;
{
struct recvdpkt *r, *next;
struct timeval now, diff, sweep;
sched_get_monotonic_time(&now);
/* calculate sweep time; delete entries older than this */
diff.tv_sec = lcconf->retry_counter * lcconf->retry_interval;
diff.tv_usec = 0;
timersub(&now, &diff, &sweep);
for (r = LIST_FIRST(&rcptree); r; r = next) {
next = LIST_NEXT(r, chain);
if (timercmp(&r->time_send, &sweep, <)) {
rem_recvdpkt(r);
del_recvdpkt(r);
}
}
sched_schedule(&sc_sweep, diff.tv_sec, sweep_recvdpkt);
}
void
init_recvdpkt()
{
time_t lt = lcconf->retry_counter * lcconf->retry_interval;
LIST_INIT(&rcptree);
sched_schedule(&sc_sweep, lt, sweep_recvdpkt);
}
#ifdef ENABLE_HYBRID
/*
* Retruns 0 if the address was obtained by ISAKMP mode config, 1 otherwise
* This should be in isakmp_cfg.c but ph1tree being private, it must be there
*/
int
exclude_cfg_addr(addr)
const struct sockaddr *addr;
{
struct ph1handle *p;
struct sockaddr_in *sin;
LIST_FOREACH(p, &ph1tree, chain) {
if ((p->mode_cfg != NULL) &&
(p->mode_cfg->flags & ISAKMP_CFG_GOT_ADDR4) &&
(addr->sa_family == AF_INET)) {
sin = (struct sockaddr_in *)addr;
if (sin->sin_addr.s_addr == p->mode_cfg->addr4.s_addr)
return 0;
}
}
return 1;
}
#endif
/*
* Reload conf code
*/
static int revalidate_ph2(struct ph2handle *iph2){
struct sainfoalg *alg;
int found, check_level;
struct sainfo *sainfo;
struct saprop *approval;
struct ph1handle *iph1;
/*
* Get the new sainfo using values of the old one
*/
if (iph2->sainfo != NULL) {
iph2->sainfo = getsainfo(iph2->sainfo->idsrc,
iph2->sainfo->iddst, iph2->sainfo->id_i,
NULL, iph2->sainfo->remoteid);
}
approval = iph2->approval;
sainfo = iph2->sainfo;
if (sainfo == NULL) {
/*
* Sainfo has been removed
*/
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: No sainfo for ph2\n");
return 0;
}
if (approval == NULL) {
/*
* XXX why do we have a NULL approval sometimes ???
*/
plog(LLV_DEBUG, LOCATION, NULL,
"No approval found !\n");
return 0;
}
/*
* Don't care about proposals, should we do something ?
* We have to keep iph2->proposal valid at least for initiator,
* for pk_sendgetspi()
*/
plog(LLV_DEBUG, LOCATION, NULL, "active single bundle:\n");
printsaprop0(LLV_DEBUG, approval);
/*
* Validate approval against sainfo
* Note: we must have an updated ph1->rmconf before doing that,
* we'll set check_level to EXACT if we don't have a ph1
* XXX try tu find the new remote section to get the new check level ?
* XXX lifebyte
*/
if (iph2->ph1 != NULL)
iph1=iph2->ph1;
else
iph1=getph1byaddr(iph2->src, iph2->dst, 0);
if(iph1 != NULL && iph1->rmconf != NULL) {
check_level = iph1->rmconf->pcheck_level;
} else {
if(iph1 != NULL)
plog(LLV_DEBUG, LOCATION, NULL, "No phase1 rmconf found !\n");
else
plog(LLV_DEBUG, LOCATION, NULL, "No phase1 found !\n");
check_level = PROP_CHECK_EXACT;
}
switch (check_level) {
case PROP_CHECK_OBEY:
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: OBEY for ph2, ok\n");
return 1;
break;
case PROP_CHECK_STRICT:
/* FALLTHROUGH */
case PROP_CHECK_CLAIM:
if (sainfo->lifetime < approval->lifetime) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: lifetime mismatch\n");
return 0;
}
#if 0
/* Lifebyte is deprecated, just ignore it
*/
if (sainfo->lifebyte < approval->lifebyte) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: lifebyte mismatch\n");
return 0;
}
#endif
if (sainfo->pfs_group &&
sainfo->pfs_group != approval->pfs_group) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: PFS group mismatch\n");
return 0;
}
break;
case PROP_CHECK_EXACT:
if (sainfo->lifetime != approval->lifetime ||
#if 0
/* Lifebyte is deprecated, just ignore it
*/
sainfo->lifebyte != approval->lifebyte ||
#endif
sainfo->pfs_group != iph2->approval->pfs_group) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: lifetime | pfs mismatch\n");
return 0;
}
break;
default:
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: Shouldn't be here !\n");
return 0;
break;
}
for (alg = sainfo->algs[algclass_ipsec_auth]; alg; alg = alg->next) {
if (alg->alg == approval->head->head->authtype)
break;
}
if (alg == NULL) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: alg == NULL (auth)\n");
return 0;
}
found = 0;
for (alg = sainfo->algs[algclass_ipsec_enc];
(found == 0 && alg != NULL); alg = alg->next) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: next ph2 enc alg...\n");
if (alg->alg != approval->head->head->trns_id){
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: encmode mismatch (%d / %d)\n",
alg->alg, approval->head->head->trns_id);
continue;
}
switch (check_level){
/* PROP_CHECK_STRICT cannot happen here */
case PROP_CHECK_EXACT:
if (alg->encklen != approval->head->head->encklen) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: enclen mismatch\n");
continue;
}
break;
case PROP_CHECK_CLAIM:
/* FALLTHROUGH */
case PROP_CHECK_STRICT:
if (alg->encklen > approval->head->head->encklen) {
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: enclen mismatch\n");
continue;
}
break;
default:
plog(LLV_ERROR, LOCATION, NULL,
"unexpected check_level\n");
continue;
break;
}
found = 1;
}
if (!found){
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: No valid enc\n");
return 0;
}
/*
* XXX comp
*/
plog(LLV_DEBUG, LOCATION, NULL,
"Reload: ph2 check ok\n");
return 1;
}
static void
remove_ph2(struct ph2handle *iph2)
{
u_int32_t spis[2];
if(iph2 == NULL)
return;
plog(LLV_DEBUG, LOCATION, NULL,
"Deleting a Ph2...\n");
if (iph2->status == PHASE2ST_ESTABLISHED)
isakmp_info_send_d2(iph2);
if(iph2->approval != NULL && iph2->approval->head != NULL){
spis[0]=iph2->approval->head->spi;
spis[1]=iph2->approval->head->spi_p;
/* purge_ipsec_spi() will do all the work:
* - delete SPIs in kernel
* - delete generated SPD
* - unbind / rem / del ph2
*/
purge_ipsec_spi(iph2->dst, iph2->approval->head->proto_id,
spis, 2);
}else{
remph2(iph2);
delph2(iph2);
}
}
static void remove_ph1(struct ph1handle *iph1){
struct ph2handle *iph2, *iph2_next;
if(iph1 == NULL)
return;
plog(LLV_DEBUG, LOCATION, NULL,
"Removing PH1...\n");
if (iph1->status == PHASE1ST_ESTABLISHED ||
iph1->status == PHASE1ST_DYING) {
for (iph2 = LIST_FIRST(&iph1->ph2tree); iph2; iph2 = iph2_next) {
iph2_next = LIST_NEXT(iph2, ph1bind);
remove_ph2(iph2);
}
isakmp_info_send_d1(iph1);
}
iph1->status = PHASE1ST_EXPIRED;
/* directly call isakmp_ph1delete to avoid as possible a race
* condition where we'll try to access iph1->rmconf after it has
* freed
*/
isakmp_ph1delete(iph1);
}
static int revalidate_ph1tree_rmconf(void)
{
struct ph1handle *p, *next;
struct remoteconf *rmconf;
for (p = LIST_FIRST(&ph1tree); p; p = next) {
next = LIST_NEXT(p, chain);
if (p->status >= PHASE1ST_EXPIRED)
continue;
if (p->rmconf == NULL)
continue;
rmconf = getrmconf_by_ph1(p);
if (rmconf == NULL || rmconf == RMCONF_ERR_MULTIPLE)
remove_ph1(p);
else
p->rmconf = rmconf;
}
return 1;
}
static int revalidate_ph2tree(void){
struct ph2handle *p, *next;
for (p = LIST_FIRST(&ph2tree); p; p = next) {
next = LIST_NEXT(p, chain);
if (p->status == PHASE2ST_EXPIRED)
continue;
if(!revalidate_ph2(p)){
plog(LLV_DEBUG, LOCATION, NULL,
"PH2 not validated, removing it\n");
remove_ph2(p);
}
}
return 1;
}
int
revalidate_ph12(void)
{
revalidate_ph1tree_rmconf();
revalidate_ph2tree();
return 1;
}
#ifdef ENABLE_HYBRID
struct ph1handle *
getph1bylogin(login)
char *login;
{
struct ph1handle *p;
LIST_FOREACH(p, &ph1tree, chain) {
if (p->mode_cfg == NULL)
continue;
if (strncmp(p->mode_cfg->login, login, LOGINLEN) == 0)
return p;
}
return NULL;
}
int
purgeph1bylogin(login)
char *login;
{
struct ph1handle *p;
int found = 0;
LIST_FOREACH(p, &ph1tree, chain) {
if (p->mode_cfg == NULL)
continue;
if (strncmp(p->mode_cfg->login, login, LOGINLEN) == 0) {
if (p->status >= PHASE1ST_EXPIRED)
continue;
if (p->status >= PHASE1ST_ESTABLISHED)
isakmp_info_send_d1(p);
purge_remote(p);
found++;
}
}
return found;
}
#endif
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