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Comparing gvpe/src/device-linux.C (file contents):
Revision 1.3 by pcg, Tue Oct 14 03:22:09 2003 UTC vs.
Revision 1.17 by pcg, Sat Nov 10 05:14:22 2007 UTC

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 4
5 This file is part of GVPE.
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. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17*/ 20*/
18 21
19#include "config.h" 22#include "config.h"
20 23
21#include <cstdio> 24#include <cstdio>
… …
41 44
42#include "gettext.h" 45#include "gettext.h"
43 46
44#include "conf.h" 47#include "conf.h"
45 48
49#if TEST_ETHEREMU
50# define IF_istun
51# include "ether_emu.C"
52#endif
53
46const char * 54const char *
47tap_device::info () 55tap_device::info ()
48{ 56{
49 return _("Linux tun/tap device"); 57 return _("Linux tun/tap device");
50} 58}
51 59
60const char *
61tap_device::if_up ()
62{
63 return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU";
64}
65
52tap_device::tap_device () 66tap_device::tap_device ()
53{ 67{
54 struct ifreq ifr; 68 struct ifreq ifr;
55 69
56 device = DEFAULT_DEVICE; 70 device = (char *)DEFAULT_DEVICE;
57 71
58 fd = open (device, O_RDWR); 72 fd = open (device, O_RDWR);
59 73
60 if (fd < 0) 74 if (fd < 0)
61 { 75 {
62 slog (L_ERR, _("could not open device %s: %s"), device, strerror (errno)); 76 slog (L_ERR, _("could not open device %s: %s"), device, strerror (errno));
63 exit (1); 77 exit (EXIT_FAILURE);
64 } 78 }
65 79
66 memset (&ifr, 0, sizeof (ifr)); 80 memset (&ifr, 0, sizeof (ifr));
81#if TEST_ETHEREMU
82 ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
83#else
67 ifr.ifr_flags = IFF_TAP | IFF_NO_PI; 84 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
85#endif
68 86
69 if (conf.ifname) 87 if (conf.ifname)
70 strncpy (ifr.ifr_name, conf.ifname, IFNAMSIZ); 88 strncpy (ifr.ifr_name, conf.ifname, IFNAMSIZ);
71 else 89 else
72 ifr.ifr_name[0] = 0; 90 ifr.ifr_name[0] = 0;
… …
76 strncpy (ifrname, ifr.ifr_name, IFNAMSIZ); 94 strncpy (ifrname, ifr.ifr_name, IFNAMSIZ);
77 ifrname [IFNAMSIZ] = 0; 95 ifrname [IFNAMSIZ] = 0;
78 } 96 }
79 else 97 else
80 { 98 {
81 slog (L_CRIT, _("unable to configure tun/tap interface: %s"), strerror (errno)); 99 slog (L_CRIT, _("unable to configure tun/tap interface, exiting: %s"), strerror (errno));
82 exit (1); 100 exit (EXIT_FAILURE);
83 } 101 }
102
103#if 0
104 does not work
105 id2mac (THISNODE->id, &ifr.ifr_hwaddr.sa_data);
106 if (ioctl (fd, SIOCSIFHWADDR, &ifr))
107 {
108 slog (L_ERR, _("cannot set MAC address for device %s, exiting: %s"), ifrname, strerror (errno));
109 exit (EXIT_FAILURE);
110 }
111#endif
84 112
85 if (ioctl (fd, TUNSETPERSIST, conf.ifpersist ? 1 : 0)) 113 if (ioctl (fd, TUNSETPERSIST, conf.ifpersist ? 1 : 0))
86 slog (L_WARN, _("cannot set persistency mode for device %s: %s"), ifrname, strerror (errno)); 114 slog (L_WARN, _("cannot set persistency mode for device %s: %s"), ifrname, strerror (errno));
87 115
88 slog (L_DEBUG, _("%s is a %s"), device, info ()); 116 slog (L_DEBUG, _("%s is a %s"), device, info ());
… …
96tap_packet * 124tap_packet *
97tap_device::recv () 125tap_device::recv ()
98{ 126{
99 tap_packet *pkt = new tap_packet; 127 tap_packet *pkt = new tap_packet;
100 128
129#if TEST_ETHEREMU
130 pkt->len = read (fd, &((*pkt)[14]), MAX_MTU - 14);
131#else
101 pkt->len = read (fd, &((*pkt)[0]), MAX_MTU); 132 pkt->len = read (fd, &((*pkt)[0]), MAX_MTU);
133#endif
102 134
103 if (pkt->len <= 0) 135 if (pkt->len <= 0)
104 { 136 {
105 delete pkt; 137 delete pkt;
106 slog (L_ERR, _("error while reading from %s %s: %s"), 138 slog (L_ERR, _("error while reading from %s %s: %s"),
107 info (), DEFAULT_DEVICE, strerror (errno)); 139 info (), DEFAULT_DEVICE, strerror (errno));
108 return 0; 140 return 0;
109 } 141 }
110 142
143#if TEST_ETHEREMU
144 pkt->len += 14;
145
146 // assume ipv4
147 (*pkt)[12] = 0x08;
148 (*pkt)[13] = 0x00;
149
150 if (!ether_emu.tun_to_tap (pkt))
151 {
152 delete pkt;
153 return 0;
154 }
155#endif
156
111 return pkt; 157 return pkt;
112} 158}
113 159
114void 160void
115tap_device::send (tap_packet *pkt) 161tap_device::send (tap_packet *pkt)
116{ 162{
163#if TEST_ETHEREMU
164 if (ether_emu.tap_to_tun (pkt) &&
165 write (fd, &((*pkt)[14]), pkt->len - 14) < 0)
166#else
117 if (write (fd, &((*pkt)[0]), pkt->len) < 0) 167 if (write (fd, &((*pkt)[0]), pkt->len) < 0)
168#endif
118 slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, 169 slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE,
119 strerror (errno)); 170 strerror (errno));
120} 171}
121 172

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