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 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