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) 2003-2008 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 it |
5 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
6 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
7 | (at your option) any later version. |
10 | 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, but |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | 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 GNU General |
12 | GNU General Public License for more details. |
15 | 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 along |
15 | along with this program; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
17 | */ |
30 | */ |
18 | |
31 | |
19 | #include <cstdio> |
32 | #include <cstdio> |
20 | #include <cstring> |
33 | #include <cstring> |
21 | #include <cerrno> |
34 | #include <cerrno> |
… | |
… | |
58 | #define ifdebug(subsys) if (0) |
71 | #define ifdebug(subsys) if (0) |
59 | |
72 | |
60 | #define cp() |
73 | #define cp() |
61 | #define lookup_config(config_tree,key) (key) |
74 | #define lookup_config(config_tree,key) (key) |
62 | |
75 | |
63 | #define MTU MAXSIZE |
76 | #define MTU MAX_MTU |
64 | |
77 | |
65 | // BIGGEST hack of 'em all |
78 | // BIGGEST hack of 'em all |
66 | // will be casted to data_packet, due to structural similarity |
79 | // will be casted to data_packet, due to structural similarity |
67 | struct vpn_packet_t : net_packet { |
80 | struct vpn_packet_t : net_packet |
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81 | { |
68 | u8 data[MAXSIZE]; |
82 | u8 data[MAXSIZE]; |
69 | }; |
83 | }; |
70 | |
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71 | static tap_device *self; |
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72 | |
84 | |
73 | static bool overwrite_mac; |
85 | static bool overwrite_mac; |
74 | |
86 | |
75 | static bool |
87 | static bool |
76 | get_config_string(const char *key, char **res) |
88 | get_config_string(const char *key, char **res) |
77 | { |
89 | { |
78 | if (!strcmp (key, "Interface")) |
90 | if (!strcmp (key, "Interface")) |
79 | *res = conf.ifname; |
91 | *res = conf.ifname; |
80 | else if (!strcmp (key, "Device")) |
92 | else if (!strcmp (key, "Device")) |
81 | *res = 0; |
93 | *res = 0; |
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94 | else if (!strcmp (key, "DeviceType")) |
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95 | *res = "tap"; |
82 | else |
96 | else |
83 | { |
97 | { |
84 | slog (L_ERR, _("tincd layer asking for unknown config '%s'"), key); |
98 | slog (L_ERR, _("tincd layer asking for unknown config '%s'"), key); |
85 | *res = 0; |
99 | *res = 0; |
86 | } |
100 | } |
… | |
… | |
90 | |
104 | |
91 | #define netname conf.ifname |
105 | #define netname conf.ifname |
92 | |
106 | |
93 | #if IF_linux |
107 | #if IF_linux |
94 | # include "tincd/linux/device.c" |
108 | # include "tincd/linux/device.c" |
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109 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU"; } |
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110 | |
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111 | #elif IF_bsd |
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112 | # include "tincd/bsd/device.c" |
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113 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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114 | |
95 | #elif IF_freebsd |
115 | #elif IF_freebsd |
96 | # include "tincd/freebsd/device.c" |
116 | # include "tincd/freebsd/device.c" |
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117 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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118 | |
97 | #elif IF_netbsd |
119 | #elif IF_netbsd |
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120 | # define IF_istun 1 |
98 | # include "tincd/netbsd/device.c" |
121 | # include "tincd/netbsd/device.c" |
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122 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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123 | |
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124 | #elif IF_openbsd |
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125 | # define IF_istun 1 |
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126 | # include "tincd/openbsd/device.c" |
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127 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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128 | |
99 | #elif IF_solaris |
129 | #elif IF_solaris |
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130 | # define IF_istun 1 |
100 | # include "tincd/solaris/device.c" |
131 | # include "tincd/solaris/device.c" |
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132 | const char * tap_device::if_up () { return ""; } |
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133 | |
101 | #elif IF_cygwin |
134 | #elif IF_cygwin |
102 | # include "tincd/cygwin/device.c" |
135 | # include "tincd/cygwin/device.c" |
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136 | const char * tap_device::if_up () { return ""; } |
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137 | |
103 | #elif IF_mingw |
138 | #elif IF_mingw |
104 | # include "tincd/mingw/device.c" |
139 | # include "tincd/mingw/device.c" |
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140 | const char * tap_device::if_up () { return ""; } |
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141 | |
105 | #elif IF_darwin |
142 | #elif IF_darwin |
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143 | # define IF_istun 1 |
106 | # include "tincd/darwin/device.c" |
144 | # include "tincd/darwin/device.c" |
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145 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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146 | |
107 | #elif IF_raw_socket |
147 | #elif IF_raw_socket |
108 | # include "tincd/raw_socket/device.c" |
148 | # include "tincd/raw_socket/device.c" |
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149 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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150 | |
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151 | #elif IF_uml_socket |
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152 | # include "tincd/uml_socket/device.c" |
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153 | const char * tap_device::if_up () { return 0; } |
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154 | |
109 | #else |
155 | #else |
110 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
156 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
111 | #endif |
157 | #endif |
112 | |
158 | |
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159 | #if IF_istun |
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160 | # include "ether_emu.C" |
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161 | #endif |
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162 | |
113 | const char * |
163 | const char * |
114 | tap_device::info () |
164 | tap_device::info () |
115 | { |
165 | { |
116 | return _("tincd compatibility layer"); |
166 | return _("tincd compatibility layer"); |
117 | } |
167 | } |
118 | |
168 | |
119 | tap_device::tap_device () |
169 | tap_device::tap_device () |
120 | { |
170 | { |
121 | self = this; |
171 | device = "(null)"; |
122 | |
172 | |
123 | if (setup_device ()) |
173 | bool ok = setup_device (); |
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174 | |
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175 | if (device_info) |
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176 | device = device_info; |
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177 | |
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178 | if (ok) |
124 | { |
179 | { |
125 | //slog (L_DEBUG, _("%s is a %s"), device, info ()); |
180 | slog (L_DEBUG, _("interface %s on %s initialized"), info (), device); |
126 | fd = device_fd; |
181 | fd = device_fd; |
127 | strcpy (ifrname, iface); |
182 | strcpy (ifrname, iface); |
128 | } |
183 | } |
129 | else |
184 | else |
130 | { |
185 | { |
131 | slog (L_ERR, _("error while configuring tincd device (%s/%s)"), device, info ()); |
186 | slog (L_ERR, _("error while configuring tincd device %s on %s"), info (), device); |
132 | exit (1); |
187 | exit (EXIT_FAILURE); |
133 | } |
188 | } |
134 | } |
189 | } |
135 | |
190 | |
136 | tap_device::~tap_device () |
191 | tap_device::~tap_device () |
137 | { |
192 | { |
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144 | tap_packet *pkt = new tap_packet; |
199 | tap_packet *pkt = new tap_packet; |
145 | |
200 | |
146 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
201 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
147 | { |
202 | { |
148 | delete pkt; |
203 | delete pkt; |
149 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), DEFAULT_DEVICE, |
204 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), device, |
150 | strerror (errno)); |
205 | strerror (errno)); |
151 | return 0; |
206 | return 0; |
152 | } |
207 | } |
153 | |
208 | |
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209 | #if IF_istun |
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210 | // assume ipv4 |
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211 | (*pkt)[12] = 0x08; |
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212 | (*pkt)[13] = 0x00; |
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213 | |
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214 | if (!ether_emu.tun_to_tap (pkt)) |
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215 | { |
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216 | delete pkt; |
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217 | return 0; |
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218 | } |
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219 | #endif |
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220 | |
154 | return pkt; |
221 | return pkt; |
155 | } |
222 | } |
156 | |
223 | |
157 | void |
224 | void |
158 | tap_device::send (tap_packet *pkt) |
225 | tap_device::send (tap_packet *pkt) |
159 | { |
226 | { |
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227 | if ( |
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228 | #if IF_istun |
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229 | ether_emu.tap_to_tun (pkt) && |
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230 | #endif |
160 | if (!write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
231 | !write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
161 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
232 | slog (L_ERR, _("can't write to %s %s: %s"), info (), device, |
162 | strerror (errno)); |
233 | strerror (errno)); |
163 | } |
234 | } |
164 | |
235 | |
165 | |
236 | |