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