1 /* $OpenBSD: sysdep.c,v 1.35 2005/12/21 01:40:23 millert 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 "sysdep.h" 41 42 #include "app.h" 43 #include "log.h" 44 #include "monitor.h" 45 #include "util.h" 46 47 48 /* Force communication on socket FD to go in the clear. */ 49 int 50 sysdep_cleartext(int fd, int af) 51 { 52 int level, sw; 53 struct { 54 int ip_proto; /* IP protocol */ 55 int auth_level; 56 int esp_trans_level; 57 int esp_network_level; 58 int ipcomp_level; 59 } optsw[] = { 60 { 61 IPPROTO_IP, 62 IP_AUTH_LEVEL, 63 IP_ESP_TRANS_LEVEL, 64 IP_ESP_NETWORK_LEVEL, 65 #ifdef IP_IPCOMP_LEVEL 66 IP_IPCOMP_LEVEL 67 #else 68 0 69 #endif 70 }, { 71 IPPROTO_IPV6, 72 IPV6_AUTH_LEVEL, 73 IPV6_ESP_TRANS_LEVEL, 74 IPV6_ESP_NETWORK_LEVEL, 75 #ifdef IPV6_IPCOMP_LEVEL 76 IPV6_IPCOMP_LEVEL 77 #else 78 0 79 #endif 80 }, 81 }; 82 83 if (app_none) 84 return 0; 85 86 switch (af) { 87 case AF_INET: 88 sw = 0; 89 break; 90 case AF_INET6: 91 sw = 1; 92 break; 93 default: 94 log_print("sysdep_cleartext: unsupported protocol family %d", af); 95 return -1; 96 } 97 98 /* 99 * Need to bypass system security policy, so I can send and 100 * receive key management datagrams in the clear. 101 */ 102 level = IPSEC_LEVEL_BYPASS; 103 if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].auth_level, 104 (char *) &level, sizeof level) == -1) { 105 log_error("sysdep_cleartext: " 106 "setsockopt (%d, %d, IP_AUTH_LEVEL, ...) failed", fd, 107 optsw[sw].ip_proto); 108 return -1; 109 } 110 if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_trans_level, 111 (char *) &level, sizeof level) == -1) { 112 log_error("sysdep_cleartext: " 113 "setsockopt (%d, %d, IP_ESP_TRANS_LEVEL, ...) failed", fd, 114 optsw[sw].ip_proto); 115 return -1; 116 } 117 if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_network_level, 118 (char *) &level, sizeof level) == -1) { 119 log_error("sysdep_cleartext: " 120 "setsockopt (%d, %d, IP_ESP_NETWORK_LEVEL, ...) failed", fd, 121 optsw[sw].ip_proto); 122 return -1; 123 } 124 if (optsw[sw].ipcomp_level && 125 monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].ipcomp_level, 126 (char *) &level, sizeof level) == -1 && 127 errno != ENOPROTOOPT) { 128 log_error("sysdep_cleartext: " 129 "setsockopt (%d, %d, IP_IPCOMP_LEVEL, ...) failed,", fd, 130 optsw[sw].ip_proto); 131 return -1; 132 } 133 return 0; 134 } 135