| 1 | /* |
1 | /* |
| 2 | device-linux.C -- Interaction with Linux tun/tap device |
2 | device-linux.C -- Interaction with Linux tun/tap device |
| 3 | Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
| 4 | |
4 | |
| 5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
| 6 | |
6 | |
| 7 | GVPE is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify it |
| 8 | 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 |
| 9 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
| 10 | (at your option) any later version. |
10 | option) any later version. |
| 11 | |
11 | |
| 12 | 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 |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| 15 | GNU General Public License for more details. |
15 | Public License for more details. |
| 16 | |
16 | |
| 17 | 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 |
| 18 | along with gvpe; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 | 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. |
| 20 | */ |
30 | */ |
| 21 | |
31 | |
| 22 | #include "config.h" |
32 | #include "config.h" |
| 23 | |
33 | |
| 24 | #include <cstdio> |
34 | #include <cstdio> |
| … | |
… | |
| 58 | } |
68 | } |
| 59 | |
69 | |
| 60 | const char * |
70 | const char * |
| 61 | tap_device::if_up () |
71 | tap_device::if_up () |
| 62 | { |
72 | { |
| 63 | return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU up"; |
73 | return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU"; |
| 64 | } |
74 | } |
| 65 | |
75 | |
| 66 | tap_device::tap_device () |
76 | tap_device::tap_device () |
| 67 | { |
77 | { |
| 68 | struct ifreq ifr; |
78 | struct ifreq ifr; |
| 69 | |
79 | |
| 70 | device = DEFAULT_DEVICE; |
80 | device = (char *)DEFAULT_DEVICE; |
| 71 | |
81 | |
| 72 | fd = open (device, O_RDWR); |
82 | fd = open (device, O_RDWR); |
| 73 | |
83 | |
| 74 | if (fd < 0) |
84 | if (fd < 0) |
| 75 | { |
85 | { |
| … | |
… | |
| 94 | strncpy (ifrname, ifr.ifr_name, IFNAMSIZ); |
104 | strncpy (ifrname, ifr.ifr_name, IFNAMSIZ); |
| 95 | ifrname [IFNAMSIZ] = 0; |
105 | ifrname [IFNAMSIZ] = 0; |
| 96 | } |
106 | } |
| 97 | else |
107 | else |
| 98 | { |
108 | { |
| 99 | slog (L_CRIT, _("unable to configure tun/tap interface: %s"), strerror (errno)); |
109 | slog (L_CRIT, _("unable to configure tun/tap interface, exiting: %s"), strerror (errno)); |
| 100 | exit (EXIT_FAILURE); |
110 | exit (EXIT_FAILURE); |
| 101 | } |
111 | } |
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112 | |
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113 | #if 0 |
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114 | does not work |
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115 | id2mac (THISNODE->id, &ifr.ifr_hwaddr.sa_data); |
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116 | if (ioctl (fd, SIOCSIFHWADDR, &ifr)) |
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117 | { |
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118 | slog (L_ERR, _("cannot set MAC address for device %s, exiting: %s"), ifrname, strerror (errno)); |
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119 | exit (EXIT_FAILURE); |
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120 | } |
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121 | #endif |
| 102 | |
122 | |
| 103 | if (ioctl (fd, TUNSETPERSIST, conf.ifpersist ? 1 : 0)) |
123 | if (ioctl (fd, TUNSETPERSIST, conf.ifpersist ? 1 : 0)) |
| 104 | slog (L_WARN, _("cannot set persistency mode for device %s: %s"), ifrname, strerror (errno)); |
124 | slog (L_WARN, _("cannot set persistency mode for device %s: %s"), ifrname, strerror (errno)); |
| 105 | |
125 | |
| 106 | slog (L_DEBUG, _("%s is a %s"), device, info ()); |
126 | slog (L_DEBUG, _("%s is a %s"), device, info ()); |
| … | |
… | |
| 154 | if (ether_emu.tap_to_tun (pkt) && |
174 | if (ether_emu.tap_to_tun (pkt) && |
| 155 | write (fd, &((*pkt)[14]), pkt->len - 14) < 0) |
175 | write (fd, &((*pkt)[14]), pkt->len - 14) < 0) |
| 156 | #else |
176 | #else |
| 157 | if (write (fd, &((*pkt)[0]), pkt->len) < 0) |
177 | if (write (fd, &((*pkt)[0]), pkt->len) < 0) |
| 158 | #endif |
178 | #endif |
| 159 | slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, |
179 | slog (L_ERR, _("can't write %d byte packet to %s %s: %s"), pkt->len, info (), DEFAULT_DEVICE, |
| 160 | strerror (errno)); |
180 | strerror (errno)); |
| 161 | } |
181 | } |
| 162 | |
182 | |
