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Comparing gvpe/src/device-linux.C (file contents):
Revision 1.1 by pcg, Sat Mar 1 15:53:03 2003 UTC vs.
Revision 1.12 by pcg, Wed Mar 23 21:55:39 2005 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17*/ 20*/
18 21
19#include "config.h" 22#include "config.h"
20 23
… …
28#include <fcntl.h> 31#include <fcntl.h>
29#include <net/if.h> 32#include <net/if.h>
30#include <unistd.h> 33#include <unistd.h>
31#include <sys/ioctl.h> 34#include <sys/ioctl.h>
32 35
36#include <net/if.h>
37
33#ifdef LINUX_IF_TUN_H 38#ifdef LINUX_IF_TUN_H
34#include LINUX_IF_TUN_H 39# include LINUX_IF_TUN_H
35#else 40#else
36#include <linux/if_tun.h> 41#include <linux/if_tun.h>
37#endif 42#endif
38#define DEFAULT_DEVICE "/dev/net/tun" 43#define DEFAULT_DEVICE "/dev/net/tun"
39 44
40#include "gettext.h" 45#include "gettext.h"
41 46
42#include "conf.h" 47#include "conf.h"
48
49#if TEST_ETHEREMU
50# define IF_istun
51# include "ether_emu.C"
52#endif
53
54const char *
55tap_device::info ()
56{
57 return _("Linux tun/tap device");
58}
59
60const char *
61tap_device::if_up ()
62{
63 return "/sbin/ifconfig $IFNAME hw ether $MAC mtu $MTU up";
64}
43 65
44tap_device::tap_device () 66tap_device::tap_device ()
45{ 67{
46 struct ifreq ifr; 68 struct ifreq ifr;
47 69
… …
50 fd = open (device, O_RDWR); 72 fd = open (device, O_RDWR);
51 73
52 if (fd < 0) 74 if (fd < 0)
53 { 75 {
54 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));
55 exit (1); 77 exit (EXIT_FAILURE);
56 } 78 }
57 79
58 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
59 ifr.ifr_flags = IFF_TAP | IFF_NO_PI; 84 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
85#endif
60 86
61 if (conf.ifname) 87 if (conf.ifname)
62 strncpy (ifr.ifr_name, conf.ifname, IFNAMSIZ); 88 strncpy (ifr.ifr_name, conf.ifname, IFNAMSIZ);
63 else 89 else
64 ifr.ifr_name[0] = 0; 90 ifr.ifr_name[0] = 0;
… …
69 ifrname [IFNAMSIZ] = 0; 95 ifrname [IFNAMSIZ] = 0;
70 } 96 }
71 else 97 else
72 { 98 {
73 slog (L_CRIT, _("unable to configure tun/tap interface: %s"), strerror (errno)); 99 slog (L_CRIT, _("unable to configure tun/tap interface: %s"), strerror (errno));
74 exit (1); 100 exit (EXIT_FAILURE);
75 } 101 }
76 102
77 if (conf.ifpersist)
78 if (ioctl (fd, TUNSETPERSIST, 1)) 103 if (ioctl (fd, TUNSETPERSIST, conf.ifpersist ? 1 : 0))
79 slog (L_WARN, _("cannot set persistent mode for device %s: %s"), ifrname, strerror (errno)); 104 slog (L_WARN, _("cannot set persistency mode for device %s: %s"), ifrname, strerror (errno));
80 105
81 slog (L_DEBUG, _("%s is a %s"), device, info ()); 106 slog (L_DEBUG, _("%s is a %s"), device, info ());
82} 107}
83 108
84tap_device::~tap_device () 109tap_device::~tap_device ()
… …
89tap_packet * 114tap_packet *
90tap_device::recv () 115tap_device::recv ()
91{ 116{
92 tap_packet *pkt = new tap_packet; 117 tap_packet *pkt = new tap_packet;
93 118
119#if TEST_ETHEREMU
120 pkt->len = read (fd, &((*pkt)[14]), MAX_MTU - 14);
121#else
94 pkt->len = read (fd, &((*pkt)[0]), MAX_MTU); 122 pkt->len = read (fd, &((*pkt)[0]), MAX_MTU);
123#endif
95 124
96 if (pkt->len <= 0) 125 if (pkt->len <= 0)
97 { 126 {
127 delete pkt;
98 slog (L_ERR, _("error while reading from %s %s: %s"), 128 slog (L_ERR, _("error while reading from %s %s: %s"),
99 info (), DEFAULT_DEVICE, strerror (errno)); 129 info (), DEFAULT_DEVICE, strerror (errno));
100 free (pkt);
101 return 0; 130 return 0;
102 } 131 }
132
133#if TEST_ETHEREMU
134 pkt->len += 14;
135
136 // assume ipv4
137 (*pkt)[12] = 0x08;
138 (*pkt)[13] = 0x00;
139
140 if (!ether_emu.tun_to_tap (pkt))
141 {
142 delete pkt;
143 return 0;
144 }
145#endif
103 146
104 return pkt; 147 return pkt;
105} 148}
106 149
107void 150void
108tap_device::send (tap_packet *pkt) 151tap_device::send (tap_packet *pkt)
109{ 152{
153#if TEST_ETHEREMU
154 if (ether_emu.tap_to_tun (pkt) &&
155 write (fd, &((*pkt)[14]), pkt->len - 14) < 0)
156#else
110 if (write (fd, &((*pkt)[0]), pkt->len) < 0) 157 if (write (fd, &((*pkt)[0]), pkt->len) < 0)
158#endif
111 slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE, 159 slog (L_ERR, _("can't write to %s %s: %s"), info (), DEFAULT_DEVICE,
112 strerror (errno)); 160 strerror (errno));
113} 161}
114 162

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