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/* $OpenBSD: ikev1.c,v 1.15 2014/04/22 12:00:03 reyk Exp $ */
/*
* Copyright (c) 2010-2013 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* XXX Either implement IKEv1,
* XXX or find a way to pass IKEv1 messages to isakmpd,
* XXX or remove this file and ikev1 from the iked tree.
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>
#include <signal.h>
#include <errno.h>
#include <err.h>
#include <pwd.h>
#include <event.h>
#include "iked.h"
#include "ikev2.h"
int ikev1_dispatch_parent(int, struct privsep_proc *, struct imsg *);
int ikev1_dispatch_ikev2(int, struct privsep_proc *, struct imsg *);
int ikev1_dispatch_cert(int, struct privsep_proc *, struct imsg *);
void ikev1_msg_cb(int, short, void *);
void ikev1_recv(struct iked *, struct iked_message *);
static struct privsep_proc procs[] = {
{ "parent", PROC_PARENT, ikev1_dispatch_parent },
{ "ikev2", PROC_IKEV2, ikev1_dispatch_ikev2 },
{ "certstore", PROC_CERT, ikev1_dispatch_cert }
};
pid_t
ikev1(struct privsep *ps, struct privsep_proc *p)
{
return (proc_run(ps, p, procs, nitems(procs), NULL, NULL));
}
int
ikev1_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
{
struct iked *env = p->p_env;
switch (imsg->hdr.type) {
case IMSG_CTL_RESET:
log_debug("%s: config reload", __func__);
return (0);
case IMSG_CTL_COUPLE:
case IMSG_CTL_DECOUPLE:
return (0);
case IMSG_CTL_ACTIVE:
case IMSG_CTL_PASSIVE:
return (0);
case IMSG_UDP_SOCKET:
return (config_getsocket(env, imsg, ikev1_msg_cb));
case IMSG_COMPILE:
return (0);
default:
break;
}
return (-1);
}
int
ikev1_dispatch_ikev2(int fd, struct privsep_proc *p, struct imsg *imsg)
{
struct iked *env = p->p_env;
struct iked_message msg;
u_int8_t *buf;
ssize_t len;
switch (imsg->hdr.type) {
case IMSG_IKE_MESSAGE:
log_debug("%s: message", __func__);
IMSG_SIZE_CHECK(imsg, &msg);
memcpy(&msg, imsg->data, sizeof(msg));
len = IMSG_DATA_SIZE(imsg) - sizeof(msg);
buf = (u_int8_t *)imsg->data + sizeof(msg);
if (len <= 0 || (msg.msg_data = ibuf_new(buf, len)) == NULL) {
log_debug("%s: short message", __func__);
return (0);
}
log_debug("%s: message length %zd", __func__, len);
ikev1_recv(env, &msg);
ikev2_msg_cleanup(env, &msg);
return (0);
default:
break;
}
return (-1);
}
int
ikev1_dispatch_cert(int fd, struct privsep_proc *p, struct imsg *imsg)
{
return (-1);
}
void
ikev1_msg_cb(int fd, short event, void *arg)
{
struct iked_socket *sock = arg;
struct iked *env = sock->sock_env;
struct iked_message msg;
struct ike_header hdr;
u_int8_t buf[IKED_MSGBUF_MAX];
size_t len;
struct iovec iov[2];
msg.msg_peerlen = sizeof(msg.msg_peer);
msg.msg_locallen = sizeof(msg.msg_local);
if ((len = recvfromto(fd, buf, sizeof(buf), 0,
(struct sockaddr*)&msg.msg_peer, &msg.msg_peerlen,
(struct sockaddr*)&msg.msg_local, &msg.msg_locallen)) < 1)
return;
if ((size_t)len <= sizeof(hdr))
return;
memcpy(&hdr, buf, sizeof(hdr));
if ((msg.msg_data = ibuf_new(buf, len)) == NULL)
return;
if (hdr.ike_version == IKEV2_VERSION) {
iov[0].iov_base = &msg;
iov[0].iov_len = sizeof(msg);
iov[1].iov_base = buf;
iov[1].iov_len = len;
proc_composev_imsg(&env->sc_ps, PROC_IKEV2, -1,
IMSG_IKE_MESSAGE, -1, iov, 2);
goto done;
}
ikev1_recv(env, &msg);
done:
ikev2_msg_cleanup(env, &msg);
}
void
ikev1_recv(struct iked *env, struct iked_message *msg)
{
struct ike_header *hdr;
if (ibuf_size(msg->msg_data) <= sizeof(*hdr)) {
log_debug("%s: short message", __func__);
return;
}
hdr = (struct ike_header *)ibuf_data(msg->msg_data);
log_debug("%s: header ispi %s rspi %s"
" nextpayload %u version 0x%02x exchange %u flags 0x%02x"
" msgid %u length %u", __func__,
print_spi(betoh64(hdr->ike_ispi), 8),
print_spi(betoh64(hdr->ike_rspi), 8),
hdr->ike_nextpayload,
hdr->ike_version,
hdr->ike_exchange,
hdr->ike_flags,
betoh32(hdr->ike_msgid),
betoh32(hdr->ike_length));
log_debug("%s: IKEv1 not supported", __func__);
}
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