From 2fb8a62edef7cb0988e44f92c3948cde6f34875e Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Tue, 12 Feb 2002 14:40:12 +0000 Subject: [PATCH] Added device.c for NetBSD, actually a copy of the OpenBSD one. --- src/netbsd/device.c | 163 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 src/netbsd/device.c diff --git a/src/netbsd/device.c b/src/netbsd/device.c new file mode 100644 index 00000000..ed8cb4e5 --- /dev/null +++ b/src/netbsd/device.c @@ -0,0 +1,163 @@ +/* + device.c -- Interaction with NetBSD tun device + Copyright (C) 2001-2002 Ivo Timmermans , + 2001-2002 Guus Sliepen + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id: device.c,v 1.1.2.1 2002/02/12 14:40:12 guus Exp $ +*/ + +#include "config.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include "conf.h" +#include "net.h" +#include "subnet.h" + +#include "system.h" + +#define DEFAULT_DEVICE "/dev/tun0" + +#define DEVICE_TYPE_ETHERTAP 0 +#define DEVICE_TYPE_TUNTAP 1 + +int device_fd = -1; +int device_type; +char *device; +char *interface; +char *device_info; + +int device_total_in = 0; +int device_total_out = 0; + +extern subnet_t mymac; + +/* + open the local ethertap device +*/ +int setup_device(void) +{ + if(!get_config_string(lookup_config(config_tree, "Device"), &device)) + device = DEFAULT_DEVICE; + + if(!get_config_string(lookup_config(config_tree, "Interface"), &interface)) + interface = rindex(device, '/')?rindex(device, '/')+1:device; +cp + if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) + { + syslog(LOG_ERR, _("Could not open %s: %m"), device); + return -1; + } +cp + /* Set default MAC address for ethertap devices */ + + mymac.type = SUBNET_MAC; + mymac.net.mac.address.x[0] = 0xfe; + mymac.net.mac.address.x[1] = 0xfd; + mymac.net.mac.address.x[2] = 0x00; + mymac.net.mac.address.x[3] = 0x00; + mymac.net.mac.address.x[4] = 0x00; + mymac.net.mac.address.x[5] = 0x00; + + device_info = _("NetBSD tun device"); + + syslog(LOG_INFO, _("%s is a %s"), device, device_info); +cp + return 0; +} + +void close_device(void) +{ +cp + close(device_fd); +cp +} + +int read_packet(vpn_packet_t *packet) +{ + int lenin; + u_int32_t type; + struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, MTU - 14}}; +cp + + if((lenin = readv(device_fd, vector, 2)) <= 0) + { + syslog(LOG_ERR, _("Error while reading from %s %s: %m"), device_info, device); + return -1; + } + + memcpy(packet->data, mymac.net.mac.address.x, 6); + memcpy(packet->data + 6, mymac.net.mac.address.x, 6); + packet->data[12] = 0x08; + packet->data[13] = 0x00; + + packet->len = lenin + 10; + + device_total_in += packet->len; + + if(debug_lvl >= DEBUG_TRAFFIC) + { + syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, device_info); + } + + return 0; +cp +} + +int write_packet(vpn_packet_t *packet) +{ + u_int32_t type = htonl(AF_INET); + struct iovec vector[2]; +cp + if(debug_lvl >= DEBUG_TRAFFIC) + syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"), + packet->len, device_info); + + vector[0].iov_base = &type; + vector[0].iov_len = sizeof(type); + vector[1].iov_base = packet->data + 14; + vector[1].iov_len = packet->len - 14; + + if(writev(device_fd, vector, 2) < 0) + { + syslog(LOG_ERR, _("Can't write to %s %s: %m"), device_info, device); + return -1; + } + + device_total_out += packet->len; +cp +} + +void dump_device_stats(void) +{ +cp + syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device); + syslog(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in); + syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out); +cp +} -- 2.20.1