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 | |
32 | /* make the tincd sources feel comfortable in our environment. */ |
41 | /* make the tincd sources feel comfortable in our environment. */ |
33 | /* this was reasonably easy to do. */ |
42 | /* this was reasonably easy to do. */ |
34 | #define routing_mode 1 |
43 | #define routing_mode 1 |
35 | #define RMODE_ROUTER 0 |
44 | #define RMODE_ROUTER 0 |
36 | |
45 | |
… | |
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52 | #define ifdebug(subsys) if (0) |
61 | #define ifdebug(subsys) if (0) |
53 | |
62 | |
54 | #define cp() |
63 | #define cp() |
55 | #define lookup_config(config_tree,key) (key) |
64 | #define lookup_config(config_tree,key) (key) |
56 | |
65 | |
57 | #define MTU MAXSIZE |
66 | #define MTU MAX_MTU |
58 | |
67 | |
59 | // BIGGEST hack of 'em all |
68 | // BIGGEST hack of 'em all |
60 | // will be casted to data_packet, due to structural similarity |
69 | // will be casted to data_packet, due to structural similarity |
61 | struct vpn_packet_t : net_packet { |
70 | struct vpn_packet_t : net_packet { |
62 | u8 data[MAXSIZE]; |
71 | u8 data[MAXSIZE]; |
63 | }; |
72 | }; |
64 | |
73 | |
65 | static tap_device *self; |
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66 | |
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67 | static bool overwrite_mac; |
74 | static bool overwrite_mac; |
68 | |
75 | |
69 | static bool |
76 | static bool |
70 | get_config_string(const char *key, char **res) |
77 | get_config_string(const char *key, char **res) |
71 | { |
78 | { |
72 | if (!strcmp (key, "Interface")) |
79 | if (!strcmp (key, "Interface")) |
73 | *res = conf.ifname; |
80 | *res = conf.ifname; |
74 | else if (!strcmp (key, "Device")) |
81 | else if (!strcmp (key, "Device")) |
75 | *res = 0; |
82 | *res = 0; |
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83 | else if (!strcmp (key, "DeviceType")) |
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84 | *res = "tap"; |
76 | else |
85 | else |
77 | { |
86 | { |
78 | slog (L_ERR, _("tincd layer asking for unknown config '%s'"), key); |
87 | slog (L_ERR, _("tincd layer asking for unknown config '%s'"), key); |
79 | *res = 0; |
88 | *res = 0; |
80 | } |
89 | } |
… | |
… | |
84 | |
93 | |
85 | #define netname conf.ifname |
94 | #define netname conf.ifname |
86 | |
95 | |
87 | #if IF_linux |
96 | #if IF_linux |
88 | # include "tincd/linux/device.c" |
97 | # include "tincd/linux/device.c" |
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98 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU"; } |
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99 | |
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100 | #elif IF_bsd |
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101 | # include "tincd/bsd/device.c" |
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102 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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103 | |
89 | #elif IF_freebsd |
104 | #elif IF_freebsd |
90 | # include "tincd/freebsd/device.c" |
105 | # include "tincd/freebsd/device.c" |
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106 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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107 | |
91 | #elif IF_netbsd |
108 | #elif IF_netbsd |
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109 | # define IF_istun 1 |
92 | # include "tincd/netbsd/device.c" |
110 | # include "tincd/netbsd/device.c" |
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111 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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112 | |
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113 | #elif IF_openbsd |
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114 | # define IF_istun 1 |
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115 | # include "tincd/openbsd/device.c" |
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116 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME mtu $MTU"; } |
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117 | |
93 | #elif IF_solaris |
118 | #elif IF_solaris |
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119 | # define IF_istun 1 |
94 | # include "tincd/solaris/device.c" |
120 | # include "tincd/solaris/device.c" |
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121 | const char * tap_device::if_up () { return ""; } |
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122 | |
95 | #elif IF_cygwin |
123 | #elif IF_cygwin |
96 | # include "tincd/cygwin/device.c" |
124 | # include "tincd/cygwin/device.c" |
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125 | const char * tap_device::if_up () { return ""; } |
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126 | |
97 | #elif IF_mingw |
127 | #elif IF_mingw |
98 | # include "tincd/mingw/device.c" |
128 | # include "tincd/mingw/device.c" |
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129 | const char * tap_device::if_up () { return ""; } |
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130 | |
99 | #elif IF_darwin |
131 | #elif IF_darwin |
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132 | # define IF_istun 1 |
100 | # include "tincd/darwin/device.c" |
133 | # include "tincd/darwin/device.c" |
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134 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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135 | |
101 | #elif IF_raw_socket |
136 | #elif IF_raw_socket |
102 | # include "tincd/raw_socket/device.c" |
137 | # include "tincd/raw_socket/device.c" |
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138 | const char * tap_device::if_up () { return "/sbin/ifconfig $IFNAME ether $MAC mtu $MTU"; } |
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139 | |
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140 | #elif IF_uml_socket |
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141 | # include "tincd/uml_socket/device.c" |
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142 | const char * tap_device::if_up () { return 0; } |
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143 | |
103 | #else |
144 | #else |
104 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
145 | # error No interface implementation for your IFTYPE/IFSUBTYPE combination. |
105 | #endif |
146 | #endif |
106 | |
147 | |
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148 | #if IF_istun |
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149 | # include "ether_emu.C" |
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150 | #endif |
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151 | |
107 | const char * |
152 | const char * |
108 | tap_device::info () |
153 | tap_device::info () |
109 | { |
154 | { |
110 | return _("tincd compatibility layer"); |
155 | return _("tincd compatibility layer"); |
111 | } |
156 | } |
112 | |
157 | |
113 | tap_device::tap_device () |
158 | tap_device::tap_device () |
114 | { |
159 | { |
115 | self = this; |
160 | device = "(null)"; |
116 | |
161 | |
117 | if (setup_device ()) |
162 | bool ok = setup_device (); |
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163 | |
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164 | if (device_info) |
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165 | device = device_info; |
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166 | |
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167 | if (ok) |
118 | { |
168 | { |
119 | //slog (L_DEBUG, _("%s is a %s"), device, info ()); |
169 | slog (L_DEBUG, _("interface %s on %s initialized"), info (), device); |
120 | fd = device_fd; |
170 | fd = device_fd; |
121 | strcpy (ifrname, iface); |
171 | strcpy (ifrname, iface); |
122 | } |
172 | } |
123 | else |
173 | else |
124 | { |
174 | { |
125 | slog (L_ERR, _("error while configuring tincd device (%s/%s)"), device, info ()); |
175 | slog (L_ERR, _("error while configuring tincd device %s on %s"), info (), device); |
126 | exit (1); |
176 | exit (EXIT_FAILURE); |
127 | } |
177 | } |
128 | } |
178 | } |
129 | |
179 | |
130 | tap_device::~tap_device () |
180 | tap_device::~tap_device () |
131 | { |
181 | { |
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138 | tap_packet *pkt = new tap_packet; |
188 | tap_packet *pkt = new tap_packet; |
139 | |
189 | |
140 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
190 | if (!read_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
141 | { |
191 | { |
142 | delete pkt; |
192 | delete pkt; |
143 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), DEFAULT_DEVICE, |
193 | slog (L_ERR, _("can't read from to %s %s: %s"), info (), device, |
144 | strerror (errno)); |
194 | strerror (errno)); |
145 | return 0; |
195 | return 0; |
146 | } |
196 | } |
147 | |
197 | |
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198 | #if IF_istun |
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199 | // assume ipv4 |
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200 | (*pkt)[12] = 0x08; |
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201 | (*pkt)[13] = 0x00; |
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202 | |
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203 | if (!ether_emu.tun_to_tap (pkt)) |
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204 | { |
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205 | delete pkt; |
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206 | return 0; |
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207 | } |
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208 | #endif |
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209 | |
148 | return pkt; |
210 | return pkt; |
149 | } |
211 | } |
150 | |
212 | |
151 | void |
213 | void |
152 | tap_device::send (tap_packet *pkt) |
214 | tap_device::send (tap_packet *pkt) |
153 | { |
215 | { |
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216 | if ( |
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217 | #if IF_istun |
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218 | ether_emu.tap_to_tun (pkt) && |
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219 | #endif |
154 | if (!write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
220 | !write_packet (reinterpret_cast<vpn_packet_t *>(pkt))) |
155 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
221 | slog (L_ERR, _("can't write to %s %s: %s"), info (), device, |
156 | strerror (errno)); |
222 | strerror (errno)); |
157 | } |
223 | } |
158 | |
224 | |
159 | |
225 | |