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/* $OpenBSD: sysdep.c,v 1.37 2018/01/04 14:21:00 mpi Exp $ */
/* $EOM: sysdep.c,v 1.9 2000/12/04 04:46:35 angelos Exp $ */
/*
* Copyright (c) 1998, 1999 Niklas Hallqvist. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* This code was written under funding by Ericsson Radio Systems.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "app.h"
#include "log.h"
#include "monitor.h"
#include "util.h"
/* Force communication on socket FD to go in the clear. */
int
sysdep_cleartext(int fd, int af)
{
int level, sw;
struct {
int ip_proto; /* IP protocol */
int auth_level;
int esp_trans_level;
int esp_network_level;
int ipcomp_level;
} optsw[] = {
{
IPPROTO_IP,
IP_AUTH_LEVEL,
IP_ESP_TRANS_LEVEL,
IP_ESP_NETWORK_LEVEL,
#ifdef IP_IPCOMP_LEVEL
IP_IPCOMP_LEVEL
#else
0
#endif
}, {
IPPROTO_IPV6,
IPV6_AUTH_LEVEL,
IPV6_ESP_TRANS_LEVEL,
IPV6_ESP_NETWORK_LEVEL,
#ifdef IPV6_IPCOMP_LEVEL
IPV6_IPCOMP_LEVEL
#else
0
#endif
},
};
if (app_none)
return 0;
switch (af) {
case AF_INET:
sw = 0;
break;
case AF_INET6:
sw = 1;
break;
default:
log_print("sysdep_cleartext: unsupported protocol family %d", af);
return -1;
}
/*
* Need to bypass system security policy, so I can send and
* receive key management datagrams in the clear.
*/
level = IPSEC_LEVEL_BYPASS;
if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].auth_level,
(char *) &level, sizeof level) == -1) {
log_error("sysdep_cleartext: "
"setsockopt (%d, %d, IP_AUTH_LEVEL, ...) failed", fd,
optsw[sw].ip_proto);
return -1;
}
if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_trans_level,
(char *) &level, sizeof level) == -1) {
log_error("sysdep_cleartext: "
"setsockopt (%d, %d, IP_ESP_TRANS_LEVEL, ...) failed", fd,
optsw[sw].ip_proto);
return -1;
}
if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_network_level,
(char *) &level, sizeof level) == -1) {
log_error("sysdep_cleartext: "
"setsockopt (%d, %d, IP_ESP_NETWORK_LEVEL, ...) failed", fd,
optsw[sw].ip_proto);
return -1;
}
if (optsw[sw].ipcomp_level &&
monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].ipcomp_level,
(char *) &level, sizeof level) == -1 &&
errno != ENOPROTOOPT) {
log_error("sysdep_cleartext: "
"setsockopt (%d, %d, IP_IPCOMP_LEVEL, ...) failed,", fd,
optsw[sw].ip_proto);
return -1;
}
return 0;
}
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