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/* $OpenBSD: sysdep.c,v 1.36 2014/01/22 03:09:31 deraadt Exp $ */ |
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/* $EOM: sysdep.c,v 1.9 2000/12/04 04:46:35 angelos Exp $ */ |
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/* |
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* Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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/* |
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* This code was written under funding by Ericsson Radio Systems. |
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*/ |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#include "app.h" |
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#include "log.h" |
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#include "monitor.h" |
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#include "util.h" |
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/* Force communication on socket FD to go in the clear. */ |
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int |
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sysdep_cleartext(int fd, int af) |
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{ |
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int level, sw; |
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struct { |
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int ip_proto; /* IP protocol */ |
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int auth_level; |
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int esp_trans_level; |
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int esp_network_level; |
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int ipcomp_level; |
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} optsw[] = { |
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{ |
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IPPROTO_IP, |
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IP_AUTH_LEVEL, |
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IP_ESP_TRANS_LEVEL, |
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IP_ESP_NETWORK_LEVEL, |
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#ifdef IP_IPCOMP_LEVEL |
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IP_IPCOMP_LEVEL |
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#else |
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0 |
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#endif |
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}, { |
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IPPROTO_IPV6, |
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IPV6_AUTH_LEVEL, |
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IPV6_ESP_TRANS_LEVEL, |
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IPV6_ESP_NETWORK_LEVEL, |
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#ifdef IPV6_IPCOMP_LEVEL |
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IPV6_IPCOMP_LEVEL |
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#else |
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0 |
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#endif |
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}, |
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}; |
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if (app_none) |
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return 0; |
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switch (af) { |
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case AF_INET: |
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sw = 0; |
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break; |
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case AF_INET6: |
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sw = 1; |
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break; |
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default: |
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log_print("sysdep_cleartext: unsupported protocol family %d", af); |
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return -1; |
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} |
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/* |
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* Need to bypass system security policy, so I can send and |
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* receive key management datagrams in the clear. |
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*/ |
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level = IPSEC_LEVEL_BYPASS; |
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if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].auth_level, |
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(char *) &level, sizeof level) == -1) { |
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log_error("sysdep_cleartext: " |
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"setsockopt (%d, %d, IP_AUTH_LEVEL, ...) failed", fd, |
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optsw[sw].ip_proto); |
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return -1; |
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} |
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if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_trans_level, |
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(char *) &level, sizeof level) == -1) { |
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log_error("sysdep_cleartext: " |
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"setsockopt (%d, %d, IP_ESP_TRANS_LEVEL, ...) failed", fd, |
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optsw[sw].ip_proto); |
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return -1; |
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} |
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if (monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].esp_network_level, |
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(char *) &level, sizeof level) == -1) { |
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log_error("sysdep_cleartext: " |
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"setsockopt (%d, %d, IP_ESP_NETWORK_LEVEL, ...) failed", fd, |
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optsw[sw].ip_proto); |
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return -1; |
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} |
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if (optsw[sw].ipcomp_level && |
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monitor_setsockopt(fd, optsw[sw].ip_proto, optsw[sw].ipcomp_level, |
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(char *) &level, sizeof level) == -1 && |
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errno != ENOPROTOOPT) { |
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log_error("sysdep_cleartext: " |
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"setsockopt (%d, %d, IP_IPCOMP_LEVEL, ...) failed,", fd, |
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optsw[sw].ip_proto); |
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return -1; |
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} |
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return 0; |
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} |