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) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
4 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
8 | 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 |
9 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
10 | (at your option) any later version. |
8 | |
11 | |
9 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
13 | |
16 | |
14 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
15 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | */ |
20 | */ |
18 | |
21 | |
19 | #include <cstdio> |
22 | #include <cstdio> |
20 | #include <cstring> |
23 | #include <cstring> |
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58 | #define ifdebug(subsys) if (0) |
61 | #define ifdebug(subsys) if (0) |
59 | |
62 | |
60 | #define cp() |
63 | #define cp() |
61 | #define lookup_config(config_tree,key) (key) |
64 | #define lookup_config(config_tree,key) (key) |
62 | |
65 | |
63 | #define MTU MAXSIZE |
66 | #define MTU MAX_MTU |
64 | |
67 | |
65 | // BIGGEST hack of 'em all |
68 | // BIGGEST hack of 'em all |
66 | // will be casted to data_packet, due to structural similarity |
69 | // will be casted to data_packet, due to structural similarity |
67 | struct vpn_packet_t : net_packet { |
70 | struct vpn_packet_t : net_packet { |
68 | u8 data[MAXSIZE]; |
71 | u8 data[MAXSIZE]; |
69 | }; |
72 | }; |
70 | |
73 | |
71 | static tap_device *self; |
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72 | |
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73 | static bool overwrite_mac; |
74 | static bool overwrite_mac; |
74 | |
75 | |
75 | static bool |
76 | static bool |
76 | get_config_string(const char *key, char **res) |
77 | get_config_string(const char *key, char **res) |
77 | { |
78 | { |
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90 | |
91 | |
91 | #define netname conf.ifname |
92 | #define netname conf.ifname |
92 | |
93 | |
93 | #if IF_linux |
94 | #if IF_linux |
94 | # include "tincd/linux/device.c" |
95 | # include "tincd/linux/device.c" |
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96 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU"; } |
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97 | |
95 | #elif IF_freebsd |
98 | #elif IF_freebsd |
96 | # include "tincd/freebsd/device.c" |
99 | # include "tincd/freebsd/device.c" |
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100 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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101 | |
97 | #elif IF_netbsd |
102 | #elif IF_netbsd |
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103 | # define IF_istun 1 |
98 | # include "tincd/netbsd/device.c" |
104 | # include "tincd/netbsd/device.c" |
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105 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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106 | |
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107 | #elif IF_openbsd |
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108 | # define IF_istun 1 |
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109 | # include "tincd/openbsd/device.c" |
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110 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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111 | |
99 | #elif IF_solaris |
112 | #elif IF_solaris |
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113 | # define IF_istun 1 |
100 | # include "tincd/solaris/device.c" |
114 | # include "tincd/solaris/device.c" |
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115 | const char * tap_device::if_up () { return ""; } |
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116 | |
101 | #elif IF_cygwin |
117 | #elif IF_cygwin |
102 | # include "tincd/cygwin/device.c" |
118 | # include "tincd/cygwin/device.c" |
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119 | const char * tap_device::if_up () { return ""; } |
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120 | |
103 | #elif IF_mingw |
121 | #elif IF_mingw |
104 | # include "tincd/mingw/device.c" |
122 | # include "tincd/mingw/device.c" |
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123 | const char * tap_device::if_up () { return ""; } |
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124 | |
105 | #elif IF_darwin |
125 | #elif IF_darwin |
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126 | # define IF_istun 1 |
106 | # include "tincd/darwin/device.c" |
127 | # include "tincd/darwin/device.c" |
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128 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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129 | |
107 | #elif IF_raw_socket |
130 | #elif IF_raw_socket |
108 | # include "tincd/raw_socket/device.c" |
131 | # include "tincd/raw_socket/device.c" |
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132 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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133 | |
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134 | #elif IF_uml_socket |
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135 | # include "tincd/uml_socket/device.c" |
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136 | const char * tap_device::if_up () { return 0; } |
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137 | |
109 | #else |
138 | #else |
110 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
139 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
111 | #endif |
140 | #endif |
112 | |
141 | |
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142 | #if IF_istun |
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143 | # include "ether_emu.C" |
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144 | #endif |
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145 | |
113 | const char * |
146 | const char * |
114 | tap_device::info () |
147 | tap_device::info () |
115 | { |
148 | { |
116 | return _("tincd compatibility layer"); |
149 | return _("tincd compatibility layer"); |
117 | } |
150 | } |
118 | |
151 | |
119 | tap_device::tap_device () |
152 | tap_device::tap_device () |
120 | { |
153 | { |
121 | self = this; |
154 | device = "(null)"; |
122 | |
155 | |
123 | if (setup_device ()) |
156 | bool ok = setup_device (); |
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157 | |
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158 | if (device_info) |
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159 | device = device_info; |
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160 | |
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161 | if (ok) |
124 | { |
162 | { |
125 | //slog (L_DEBUG, _("%s is a %s"), device, info ()); |
163 | slog (L_DEBUG, _("interface %s on %s initialized"), info (), device); |
126 | fd = device_fd; |
164 | fd = device_fd; |
127 | strcpy (ifrname, iface); |
165 | strcpy (ifrname, iface); |
128 | } |
166 | } |
129 | else |
167 | else |
130 | { |
168 | { |
131 | slog (L_ERR, _("error while configuring tincd device (%s/%s)"), device, info ()); |
169 | slog (L_ERR, _("error while configuring tincd device %s on %s"), info (), device); |
132 | exit (1); |
170 | exit (EXIT_FAILURE); |
133 | } |
171 | } |
134 | } |
172 | } |
135 | |
173 | |
136 | tap_device::~tap_device () |
174 | tap_device::~tap_device () |
137 | { |
175 | { |
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144 | tap_packet *pkt = new tap_packet; |
182 | tap_packet *pkt = new tap_packet; |
145 | |
183 | |
146 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
184 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
147 | { |
185 | { |
148 | delete pkt; |
186 | delete pkt; |
149 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), DEFAULT_DEVICE, |
187 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), device, |
150 | strerror (errno)); |
188 | strerror (errno)); |
151 | return 0; |
189 | return 0; |
152 | } |
190 | } |
153 | |
191 | |
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192 | #if IF_istun |
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193 | // assume ipv4 |
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194 | (*pkt)[12] = 0x08; |
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195 | (*pkt)[13] = 0x00; |
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196 | |
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197 | if (!ether_emu.tun_to_tap (pkt)) |
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198 | { |
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199 | delete pkt; |
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200 | return 0; |
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201 | } |
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202 | #endif |
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203 | |
154 | return pkt; |
204 | return pkt; |
155 | } |
205 | } |
156 | |
206 | |
157 | void |
207 | void |
158 | tap_device::send (tap_packet *pkt) |
208 | tap_device::send (tap_packet *pkt) |
159 | { |
209 | { |
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210 | if ( |
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211 | #if IF_istun |
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212 | ether_emu.tap_to_tun (pkt) && |
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213 | #endif |
160 | if (!write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
214 | !write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
161 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
215 | slog (L_ERR, _("can't write to %s %s: %s"), info (), device, |
162 | strerror (errno)); |
216 | strerror (errno)); |
163 | } |
217 | } |
164 | |
218 | |
165 | |
219 | |