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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… | |
27 | #include <syslog.h> |
30 | #include <syslog.h> |
28 | #include <fcntl.h> |
31 | #include <fcntl.h> |
29 | |
32 | |
30 | #include "conf.h" |
33 | #include "conf.h" |
31 | |
34 | |
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35 | // following headers used by cygwin (maybe others) |
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36 | #include "netcompat.h" |
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37 | #include <signal.h> |
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38 | |
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39 | #define xstrdup(strd) strdup(str) |
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40 | |
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41 | /* make the tincd sources feel comfortable in our environment. */ |
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42 | /* this was reasonably easy to do. */ |
32 | #define routing_mode 1 |
43 | #define routing_mode 1 |
33 | #define RMODE_ROUTER 0 |
44 | #define RMODE_ROUTER 0 |
34 | |
45 | |
35 | /* need iso c-90 or ugly workaround :( */ |
46 | #define LOG_TO_L(level) \ |
36 | #define logger(level, ...) slog ( \ |
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37 | (level) == LOG_ERR ? L_ERR \ |
47 | (level) == LOG_ERR ? L_ERR \ |
38 | : (level) == LOG_DEBUG ? L_DEBUG \ |
48 | : (level) == LOG_DEBUG ? L_DEBUG \ |
39 | : (level) == LOG_WARNING ? L_WARN \ |
49 | : (level) == LOG_WARNING ? L_WARN \ |
40 | : (level) == LOG_INFO ? L_INFO \ |
50 | : (level) == LOG_INFO ? L_INFO \ |
41 | : L_NOTICE, __VA_ARGS__) |
51 | : L_NOTICE |
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52 | |
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53 | #if __STDC_VERSION__ > 199900 |
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54 | # define logger(level, ...) slog (LOG_TO_L(level), __VA_ARGS__) |
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55 | #elif __GNUC__ |
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56 | # define logger(level, args...) slog (LOG_TO_L(level), ## args) |
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57 | #else |
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58 | # error either need ISO-C 99 compliant compiler or gcc. |
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59 | #endif |
42 | |
60 | |
43 | #define ifdebug(subsys) if (0) |
61 | #define ifdebug(subsys) if (0) |
44 | |
62 | |
45 | #define cp() |
63 | #define cp() |
46 | #define lookup_config(config_tree,key) (key) |
64 | #define lookup_config(config_tree,key) (key) |
47 | |
65 | |
48 | #define MTU MAXSIZE |
66 | #define MTU MAX_MTU |
49 | |
67 | |
50 | // BIGGEST hack of 'em all |
68 | // BIGGEST hack of 'em all |
51 | // will be casted to data_packet, due to structural similarity |
69 | // will be casted to data_packet, due to structural similarity |
52 | struct vpn_packet_t : net_packet { |
70 | struct vpn_packet_t : net_packet { |
53 | u8 data[MAXSIZE]; |
71 | u8 data[MAXSIZE]; |
54 | }; |
72 | }; |
55 | |
73 | |
56 | static tap_device *self; |
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57 | |
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58 | static bool overwrite_mac; |
74 | static bool overwrite_mac; |
59 | |
75 | |
60 | static bool |
76 | static bool |
61 | get_config_string(const char *key, char **res) |
77 | get_config_string(const char *key, char **res) |
62 | { |
78 | { |
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75 | |
91 | |
76 | #define netname conf.ifname |
92 | #define netname conf.ifname |
77 | |
93 | |
78 | #if IF_linux |
94 | #if IF_linux |
79 | # include "tincd/linux/device.c" |
95 | # include "tincd/linux/device.c" |
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96 | |
80 | #elif IF_freebsd |
97 | #elif IF_freebsd |
81 | # include "tincd/freebsd/device.c" |
98 | # include "tincd/freebsd/device.c" |
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99 | |
82 | #elif IF_netbsd |
100 | #elif IF_netbsd |
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101 | # define IF_istun 1 |
83 | # include "tincd/netbsd/device.c" |
102 | # include "tincd/netbsd/device.c" |
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103 | |
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104 | #elif IF_openbsd |
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105 | # define IF_istun 1 |
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106 | # include "tincd/openbsd/device.c" |
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107 | |
84 | #elif IF_solaris |
108 | #elif IF_solaris |
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109 | # define IF_istun 1 |
85 | # include "tincd/solaris/device.c" |
110 | # include "tincd/solaris/device.c" |
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111 | |
86 | #elif IF_cygwin |
112 | #elif IF_cygwin |
87 | # include "tincd/cygwin/device.c" |
113 | # include "tincd/cygwin/device.c" |
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114 | |
88 | #elif IF_mingw |
115 | #elif IF_mingw |
89 | # include "tincd/mingw/device.c" |
116 | # include "tincd/mingw/device.c" |
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117 | |
90 | #elif IF_darwin |
118 | #elif IF_darwin |
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119 | # define IF_istun 1 |
91 | # include "tincd/darwin/device.c" |
120 | # include "tincd/darwin/device.c" |
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121 | |
92 | #elif IF_raw_socket |
122 | #elif IF_raw_socket |
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123 | # define IF_istun 1 |
93 | # include "tincd/raw_socket/device.c" |
124 | # include "tincd/raw_socket/device.c" |
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125 | |
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126 | #elif IF_uml_socket |
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127 | # include "tincd/uml_socket/device.c" |
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128 | |
94 | #else |
129 | #else |
95 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
130 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
96 | #endif |
131 | #endif |
97 | |
132 | |
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133 | #if IF_istun |
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134 | # include "ether_emu.C" |
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135 | #endif |
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136 | |
98 | const char * |
137 | const char * |
99 | tap_device::info () |
138 | tap_device::info () |
100 | { |
139 | { |
101 | return _("tincd compatibility layer"); |
140 | return _("tincd compatibility layer"); |
102 | } |
141 | } |
103 | |
142 | |
104 | tap_device::tap_device () |
143 | tap_device::tap_device () |
105 | { |
144 | { |
106 | self = this; |
145 | device = "(null)"; |
107 | |
146 | |
108 | if (setup_device ()) |
147 | bool ok = setup_device (); |
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148 | |
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149 | if (device_info) |
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150 | device = device_info; |
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151 | |
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152 | if (ok) |
109 | { |
153 | { |
110 | //slog (L_DEBUG, _("%s is a %s"), device, info ()); |
154 | slog (L_DEBUG, _("interface %s on %s initialized"), info (), device); |
111 | fd = device_fd; |
155 | fd = device_fd; |
112 | strcpy (ifrname, iface); |
156 | strcpy (ifrname, iface); |
113 | } |
157 | } |
114 | else |
158 | else |
115 | { |
159 | { |
116 | slog (L_ERR, _("error while configuring tincd device (%s/%s)"), device, info ()); |
160 | slog (L_ERR, _("error while configuring tincd device %s on %s"), info (), device); |
117 | exit (1); |
161 | exit (EXIT_FAILURE); |
118 | } |
162 | } |
119 | } |
163 | } |
120 | |
164 | |
121 | tap_device::~tap_device () |
165 | tap_device::~tap_device () |
122 | { |
166 | { |
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129 | tap_packet *pkt = new tap_packet; |
173 | tap_packet *pkt = new tap_packet; |
130 | |
174 | |
131 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
175 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
132 | { |
176 | { |
133 | delete pkt; |
177 | delete pkt; |
134 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), DEFAULT_DEVICE, |
178 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), device, |
135 | strerror (errno)); |
179 | strerror (errno)); |
136 | return 0; |
180 | return 0; |
137 | } |
181 | } |
138 | |
182 | |
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183 | #if IF_istun |
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184 | // assume ipv4 |
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185 | (*pkt)[12] = 0x08; |
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186 | (*pkt)[13] = 0x00; |
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187 | |
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188 | if (!ether_emu.tun_to_tap (pkt)) |
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189 | { |
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190 | delete pkt; |
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191 | return 0; |
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192 | } |
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193 | #endif |
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194 | |
139 | return pkt; |
195 | return pkt; |
140 | } |
196 | } |
141 | |
197 | |
142 | void |
198 | void |
143 | tap_device::send (tap_packet *pkt) |
199 | tap_device::send (tap_packet *pkt) |
144 | { |
200 | { |
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201 | if ( |
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202 | #if IF_istun |
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203 | ether_emu.tap_to_tun (pkt) && |
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204 | #endif |
145 | if (!write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
205 | !write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
146 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
206 | slog (L_ERR, _("can't write to %s %s: %s"), info (), device, |
147 | strerror (errno)); |
207 | strerror (errno)); |
148 | } |
208 | } |
149 | |
209 | |
150 | |
210 | |