Import Upstream version 1.0.3
This commit is contained in:
Guus Sliepen
parent
ed8d36a434
commit
c12028eeaa
196 changed files with 43077 additions and 32886 deletions
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/*
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device.c -- Interaction with Linux ethertap and tun/tap device
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Copyright (C) 2001-2002 Ivo Timmermans <itimmermans@bigfoot.com>,
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2001-2002 Guus Sliepen <guus@sliepen.warande.net>
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Copyright (C) 2001-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
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2001-2004 Guus Sliepen <guus@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -17,208 +17,206 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: device.c,v 1.1.2.8 2002/03/24 16:36:56 guus Exp $
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$Id: device.c 1400 2004-11-01 17:02:19Z guus $
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*/
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#include "config.h"
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <net/if.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#ifdef HAVE_TUNTAP
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#ifdef LINUX_IF_TUN_H
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#include LINUX_IF_TUN_H
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#else
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#include <linux/if_tun.h>
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#endif
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#define DEFAULT_DEVICE "/dev/misc/net/tun"
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#else
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#define DEFAULT_DEVICE "/dev/tap0"
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#endif
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#include <utils.h>
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#include "conf.h"
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#include "net.h"
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#include "subnet.h"
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#include "system.h"
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#define DEVICE_TYPE_ETHERTAP 0
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#define DEVICE_TYPE_TUNTAP 1
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#ifdef HAVE_TUNTAP
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#ifdef LINUX_IF_TUN_H
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#include LINUX_IF_TUN_H
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#else
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#include <linux/if_tun.h>
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#endif
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#define DEFAULT_DEVICE "/dev/net/tun"
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#else
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#define DEFAULT_DEVICE "/dev/tap0"
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#endif
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#include "conf.h"
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#include "logger.h"
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#include "net.h"
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#include "route.h"
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#include "utils.h"
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typedef enum device_type_t {
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DEVICE_TYPE_ETHERTAP,
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DEVICE_TYPE_TUN,
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DEVICE_TYPE_TAP,
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} device_type_t;
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int device_fd = -1;
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int device_type;
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static device_type_t device_type;
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char *device;
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char *interface;
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char *iface;
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char ifrname[IFNAMSIZ];
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char *device_info;
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int device_total_in = 0;
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int device_total_out = 0;
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static int device_total_in = 0;
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static int device_total_out = 0;
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extern subnet_t mymac;
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/*
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open the local ethertap device
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*/
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int setup_device(void)
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bool setup_device(void)
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{
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struct ifreq ifr;
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struct ifreq ifr;
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cp
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if(!get_config_string(lookup_config(config_tree, "Device"), &device))
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device = DEFAULT_DEVICE;
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cp();
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if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
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if(!get_config_string(lookup_config(config_tree, "Device"), &device))
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device = DEFAULT_DEVICE;
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if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
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#ifdef HAVE_TUNTAP
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interface = netname;
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iface = netname;
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#else
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interface = rindex(device, '/')?rindex(device, '/')+1:device;
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iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
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#endif
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cp
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if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
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{
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syslog(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
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return -1;
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}
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cp
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/* Set default MAC address for ethertap devices */
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device_fd = open(device, O_RDWR | O_NONBLOCK);
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mymac.type = SUBNET_MAC;
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mymac.net.mac.address.x[0] = 0xfe;
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mymac.net.mac.address.x[1] = 0xfd;
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mymac.net.mac.address.x[2] = 0x00;
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mymac.net.mac.address.x[3] = 0x00;
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mymac.net.mac.address.x[4] = 0x00;
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mymac.net.mac.address.x[5] = 0x00;
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if(device_fd < 0) {
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logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
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return false;
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}
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#ifdef HAVE_TUNTAP
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/* Ok now check if this is an old ethertap or a new tun/tap thingie */
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/* Ok now check if this is an old ethertap or a new tun/tap thingie */
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memset(&ifr, 0, sizeof(ifr));
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cp
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ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
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if (interface)
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strncpy(ifr.ifr_name, interface, IFNAMSIZ);
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cp
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if (!ioctl(device_fd, TUNSETIFF, (void *) &ifr))
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{
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device_info = _("Linux tun/tap device");
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device_type = DEVICE_TYPE_TUNTAP;
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strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
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interface = ifrname;
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}
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else
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if (!ioctl(device_fd, (('T'<< 8) | 202), (void *) &ifr))
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{
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syslog(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
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device_type = DEVICE_TYPE_TUNTAP;
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device_info = _("Linux tun/tap device");
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strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
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interface = ifrname;
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}
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else
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memset(&ifr, 0, sizeof(ifr));
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if(routing_mode == RMODE_ROUTER) {
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ifr.ifr_flags = IFF_TUN;
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device_type = DEVICE_TYPE_TUN;
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device_info = _("Linux tun/tap device (tun mode)");
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} else {
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ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
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device_type = DEVICE_TYPE_TAP;
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device_info = _("Linux tun/tap device (tap mode)");
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}
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if(iface)
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strncpy(ifr.ifr_name, iface, IFNAMSIZ);
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if(!ioctl(device_fd, TUNSETIFF, &ifr)) {
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strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
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iface = ifrname;
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} else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) {
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logger(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
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strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
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iface = ifrname;
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} else
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#endif
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{
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device_info = _("Linux ethertap device");
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device_type = DEVICE_TYPE_ETHERTAP;
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interface = rindex(device, '/')?rindex(device, '/')+1:device;
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}
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{
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if(routing_mode == RMODE_ROUTER)
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overwrite_mac = true;
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device_info = _("Linux ethertap device");
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device_type = DEVICE_TYPE_ETHERTAP;
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iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
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}
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syslog(LOG_INFO, _("%s is a %s"), device, device_info);
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cp
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return 0;
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logger(LOG_INFO, _("%s is a %s"), device, device_info);
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return true;
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}
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void close_device(void)
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{
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cp
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close(device_fd);
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cp();
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close(device_fd);
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}
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/*
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read, encrypt and send data that is
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available through the ethertap device
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*/
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int read_packet(vpn_packet_t *packet)
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bool read_packet(vpn_packet_t *packet)
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{
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int lenin;
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cp
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if(device_type == DEVICE_TYPE_TUNTAP)
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{
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if((lenin = read(device_fd, packet->data, MTU)) <= 0)
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{
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syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno));
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return -1;
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}
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int lenin;
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cp();
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packet->len = lenin;
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}
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else /* ethertap */
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{
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if((lenin = read(device_fd, packet->data - 2, MTU + 2)) <= 0)
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{
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syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno));
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return -1;
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}
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switch(device_type) {
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case DEVICE_TYPE_TUN:
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lenin = read(device_fd, packet->data + 10, MTU - 10);
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packet->len = lenin - 2;
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}
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if(lenin <= 0) {
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logger(LOG_ERR, _("Error while reading from %s %s: %s"),
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device_info, device, strerror(errno));
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return false;
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}
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device_total_in += packet->len;
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packet->len = lenin + 10;
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break;
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case DEVICE_TYPE_TAP:
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lenin = read(device_fd, packet->data, MTU);
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if(debug_lvl >= DEBUG_TRAFFIC)
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{
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syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, device_info);
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}
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if(lenin <= 0) {
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logger(LOG_ERR, _("Error while reading from %s %s: %s"),
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device_info, device, strerror(errno));
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return false;
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}
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return 0;
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cp
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packet->len = lenin;
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break;
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case DEVICE_TYPE_ETHERTAP:
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lenin = read(device_fd, packet->data - 2, MTU + 2);
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if(lenin <= 0) {
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logger(LOG_ERR, _("Error while reading from %s %s: %s"),
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device_info, device, strerror(errno));
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return false;
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}
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packet->len = lenin - 2;
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break;
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}
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device_total_in += packet->len;
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ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
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device_info);
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return true;
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}
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int write_packet(vpn_packet_t *packet)
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bool write_packet(vpn_packet_t *packet)
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{
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cp
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if(debug_lvl >= DEBUG_TRAFFIC)
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syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
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packet->len, device_info);
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cp();
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if(device_type == DEVICE_TYPE_TUNTAP)
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{
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if(write(device_fd, packet->data, packet->len) < 0)
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{
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syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, strerror(errno));
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return -1;
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}
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}
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else/* ethertap */
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{
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*(short int *)(packet->data - 2) = packet->len;
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if(write(device_fd, packet->data - 2, packet->len + 2) < 0)
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{
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syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, strerror(errno));
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return -1;
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}
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}
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ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
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packet->len, device_info);
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device_total_out += packet->len;
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cp
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return 0;
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switch(device_type) {
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case DEVICE_TYPE_TUN:
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packet->data[10] = packet->data[11] = 0;
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if(write(device_fd, packet->data + 10, packet->len - 10) < 0) {
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logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
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strerror(errno));
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return false;
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}
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break;
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case DEVICE_TYPE_TAP:
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if(write(device_fd, packet->data, packet->len) < 0) {
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logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
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strerror(errno));
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return false;
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}
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break;
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case DEVICE_TYPE_ETHERTAP:
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*(short int *)(packet->data - 2) = packet->len;
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if(write(device_fd, packet->data - 2, packet->len + 2) < 0) {
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logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
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strerror(errno));
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return false;
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}
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break;
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}
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device_total_out += packet->len;
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return true;
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}
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void dump_device_stats(void)
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{
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cp
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syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
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syslog(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
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syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
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cp
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cp();
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logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
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logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
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logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
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}
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