1 | /* |
1 | /* |
2 | device-tincd.C -- include one of the tincd low level implementations. |
2 | device-tincd.C -- include one of the tincd low level implementations. |
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3 | Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
3 | |
4 | |
4 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
6 | it under the terms of the GNU General Public License as published by |
6 | the Free Software Foundation; either version 2 of the License, or |
7 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
8 | (at your option) any later version. |
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26 | #include <unistd.h> |
27 | #include <unistd.h> |
27 | #include <syslog.h> |
28 | #include <syslog.h> |
28 | #include <fcntl.h> |
29 | #include <fcntl.h> |
29 | |
30 | |
30 | #include "conf.h" |
31 | #include "conf.h" |
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32 | |
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33 | // following headers used by cygwin (maybe others) |
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34 | #include "netcompat.h" |
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35 | #include <signal.h> |
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36 | |
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37 | #define xstrdup(strd) strdup(str) |
31 | |
38 | |
32 | /* make the tincd sources feel comfortable in our environment. */ |
39 | /* make the tincd sources feel comfortable in our environment. */ |
33 | /* this was reasonably easy to do. */ |
40 | /* this was reasonably easy to do. */ |
34 | #define routing_mode 1 |
41 | #define routing_mode 1 |
35 | #define RMODE_ROUTER 0 |
42 | #define RMODE_ROUTER 0 |
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60 | // will be casted to data_packet, due to structural similarity |
67 | // will be casted to data_packet, due to structural similarity |
61 | struct vpn_packet_t : net_packet { |
68 | struct vpn_packet_t : net_packet { |
62 | u8 data[MAXSIZE]; |
69 | u8 data[MAXSIZE]; |
63 | }; |
70 | }; |
64 | |
71 | |
65 | static tap_device *self; |
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66 | |
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67 | static bool overwrite_mac; |
72 | static bool overwrite_mac; |
68 | |
73 | |
69 | static bool |
74 | static bool |
70 | get_config_string(const char *key, char **res) |
75 | get_config_string(const char *key, char **res) |
71 | { |
76 | { |
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84 | |
89 | |
85 | #define netname conf.ifname |
90 | #define netname conf.ifname |
86 | |
91 | |
87 | #if IF_linux |
92 | #if IF_linux |
88 | # include "tincd/linux/device.c" |
93 | # include "tincd/linux/device.c" |
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94 | |
89 | #elif IF_freebsd |
95 | #elif IF_freebsd |
90 | # include "tincd/freebsd/device.c" |
96 | # include "tincd/freebsd/device.c" |
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97 | |
91 | #elif IF_netbsd |
98 | #elif IF_netbsd |
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99 | #define IF_istun 1 |
92 | # include "tincd/netbsd/device.c" |
100 | # include "tincd/netbsd/device.c" |
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101 | |
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102 | #elif IF_openbsd |
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103 | #define IF_istun 1 |
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104 | # include "tincd/openbsd/device.c" |
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105 | |
93 | #elif IF_solaris |
106 | #elif IF_solaris |
94 | # include "tincd/solaris/device.c" |
107 | # include "tincd/solaris/device.c" |
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108 | |
95 | #elif IF_cygwin |
109 | #elif IF_cygwin |
96 | # include "tincd/cygwin/device.c" |
110 | # include "tincd/cygwin/device.c" |
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111 | |
97 | #elif IF_mingw |
112 | #elif IF_mingw |
98 | # include "tincd/mingw/device.c" |
113 | # include "tincd/mingw/device.c" |
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114 | |
99 | #elif IF_darwin |
115 | #elif IF_darwin |
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116 | #define IF_istun 1 |
100 | # include "tincd/darwin/device.c" |
117 | # include "tincd/darwin/device.c" |
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118 | |
101 | #elif IF_raw_socket |
119 | #elif IF_raw_socket |
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120 | #define IF_istun 1 |
102 | # include "tincd/raw_socket/device.c" |
121 | # include "tincd/raw_socket/device.c" |
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122 | |
103 | #else |
123 | #else |
104 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
124 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
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125 | #endif |
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126 | |
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127 | #if IF_istun |
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128 | # include "ether_emu.C" |
105 | #endif |
129 | #endif |
106 | |
130 | |
107 | const char * |
131 | const char * |
108 | tap_device::info () |
132 | tap_device::info () |
109 | { |
133 | { |
110 | return _("tincd compatibility layer"); |
134 | return _("tincd compatibility layer"); |
111 | } |
135 | } |
112 | |
136 | |
113 | tap_device::tap_device () |
137 | tap_device::tap_device () |
114 | { |
138 | { |
115 | self = this; |
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116 | |
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117 | if (setup_device ()) |
139 | if (setup_device ()) |
118 | { |
140 | { |
119 | //slog (L_DEBUG, _("%s is a %s"), device, info ()); |
141 | slog (L_DEBUG, _("interface %s initialized"), info ()); |
120 | fd = device_fd; |
142 | fd = device_fd; |
121 | strcpy (ifrname, iface); |
143 | strcpy (ifrname, iface); |
122 | } |
144 | } |
123 | else |
145 | else |
124 | { |
146 | { |
125 | slog (L_ERR, _("error while configuring tincd device (%s/%s)"), device, info ()); |
147 | slog (L_ERR, _("error while configuring tincd device (%s)"), info ()); |
126 | exit (1); |
148 | exit (1); |
127 | } |
149 | } |
128 | } |
150 | } |
129 | |
151 | |
130 | tap_device::~tap_device () |
152 | tap_device::~tap_device () |
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143 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), DEFAULT_DEVICE, |
165 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), DEFAULT_DEVICE, |
144 | strerror (errno)); |
166 | strerror (errno)); |
145 | return 0; |
167 | return 0; |
146 | } |
168 | } |
147 | |
169 | |
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170 | #if IF_istun |
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171 | // assume ipv4 |
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172 | (*pkt)[12] = 0x08; |
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173 | (*pkt)[13] = 0x00; |
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174 | |
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175 | if (!ether_emu.tun_to_tap (pkt)) |
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176 | { |
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177 | delete pkt; |
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178 | return 0; |
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179 | } |
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180 | #endif |
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181 | |
148 | return pkt; |
182 | return pkt; |
149 | } |
183 | } |
150 | |
184 | |
151 | void |
185 | void |
152 | tap_device::send (tap_packet *pkt) |
186 | tap_device::send (tap_packet *pkt) |
153 | { |
187 | { |
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188 | if ( |
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189 | #if IF_istun |
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190 | ether_emu.tap_to_tun (pkt) && |
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191 | #endif |
154 | if (!write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
192 | !write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
155 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
193 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
156 | strerror (errno)); |
194 | strerror (errno)); |
157 | } |
195 | } |
158 | |
196 | |
159 | |
197 | |