1 /* $OpenBSD: sysdep.c,v 1.38 2018/01/15 09:54:48 mpi Exp $ */
2 /* $EOM: sysdep.c,v 1.9 2000/12/04 04:46:35 angelos Exp $ */
3
4 /*
5 * Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 /*
29 * This code was written under funding by Ericsson Radio Systems.
30 */
31
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netinet/in.h>
35 #include <arpa/inet.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <errno.h>
39
40 #include "app.h"
41 #include "log.h"
42 #include "monitor.h"
43 #include "util.h"
44
45
46 /* Force communication on socket FD to go in the clear. */
47 int
sysdep_cleartext(int fd,int af)48 sysdep_cleartext(int fd, int af)
49 {
50 int level, sw;
51 struct {
52 int ip_proto; /* IP protocol */
53 int auth_level;
54 int esp_trans_level;
55 int esp_network_level;
56 int ipcomp_level;
57 } optsw[] = {
58 {
59 IPPROTO_IP,
60 IP_AUTH_LEVEL,
61 IP_ESP_TRANS_LEVEL,
62 IP_ESP_NETWORK_LEVEL,
63 #ifdef IP_IPCOMP_LEVEL
64 IP_IPCOMP_LEVEL
65 #else
66 0
67 #endif
68 }, {
69 IPPROTO_IPV6,
70 IPV6_AUTH_LEVEL,
71 IPV6_ESP_TRANS_LEVEL,
72 IPV6_ESP_NETWORK_LEVEL,
73 #ifdef IPV6_IPCOMP_LEVEL
74 IPV6_IPCOMP_LEVEL
75 #else
76 0
77 #endif
78 },
79 };
80
81 if (app_none)
82 return 0;
83
84 switch (af) {
85 case AF_INET:
86 sw = 0;
87 break;
88 case AF_INET6:
89 sw = 1;
90 break;
91 default:
92 log_print("sysdep_cleartext: unsupported protocol family %d", af);
93 return -1;
94 }
95
96 /*
97 * Need to bypass system security policy, so I can send and
98 * receive key management datagrams in the clear.
99 */
100 level = IPSEC_LEVEL_BYPASS;
101 if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].auth_level,
102 (char *) &level, sizeof level) == -1) {
103 log_error("sysdep_cleartext: "
104 "setsockopt (%d, %d, IP_AUTH_LEVEL, ...) failed", fd,
105 optsw[sw].ip_proto);
106 return -1;
107 }
108 if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_trans_level,
109 (char *) &level, sizeof level) == -1) {
110 log_error("sysdep_cleartext: "
111 "setsockopt (%d, %d, IP_ESP_TRANS_LEVEL, ...) failed", fd,
112 optsw[sw].ip_proto);
113 return -1;
114 }
115 if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_network_level,
116 (char *) &level, sizeof level) == -1) {
117 log_error("sysdep_cleartext: "
118 "setsockopt (%d, %d, IP_ESP_NETWORK_LEVEL, ...) failed", fd,
119 optsw[sw].ip_proto);
120 return -1;
121 }
122 if (optsw[sw].ipcomp_level &&
123 monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].ipcomp_level,
124 (char *) &level, sizeof level) == -1 &&
125 errno != ENOPROTOOPT) {
126 log_error("sysdep_cleartext: "
127 "setsockopt (%d, %d, IP_IPCOMP_LEVEL, ...) failed,", fd,
128 optsw[sw].ip_proto);
129 return -1;
130 }
131 return 0;
132 }
133