/* device.c -- raw socket Copyright (C) 2002-2004 Ivo Timmermans , 2002-2004 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. $Id$ */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include "conf.h" #include "net.h" #include "logger.h" #include "system.h" int device_fd = -1; char *device; char *interface; char ifrname[IFNAMSIZ]; char *device_info; int device_total_in = 0; int device_total_out = 0; bool setup_device(void) { struct ifreq ifr; struct sockaddr_ll sa; cp(); if(!get_config_string (lookup_config(config_tree, "Interface"), &interface)) interface = "eth0"; if(!get_config_string(lookup_config(config_tree, "Device"), &device)) device = interface; device_info = _("raw socket"); if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) { logger(LOG_ERR, _("Could not open %s: %s"), device_info, strerror(errno)); return false; } memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_ifrn.ifrn_name, interface, IFNAMSIZ); if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) { close(device_fd); logger(LOG_ERR, _("Can't find interface %s: %s"), interface, strerror(errno)); return false; } memset(&sa, '0', sizeof(sa)); sa.sll_family = AF_PACKET; sa.sll_protocol = htons(ETH_P_ALL); sa.sll_ifindex = ifr.ifr_ifindex; if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) { logger(LOG_ERR, _("Could not bind to %s: %s"), device, strerror(errno)); return false; } logger(LOG_INFO, _("%s is a %s"), device, device_info); return true; } void close_device(void) { cp(); close(device_fd); } bool read_packet(vpn_packet_t *packet) { int lenin; cp(); if((lenin = read(device_fd, packet->data, MTU)) <= 0) { logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno)); return false; } packet->len = lenin; device_total_in += packet->len; ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, device_info); return true; } bool write_packet(vpn_packet_t *packet) { cp(); ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"), packet->len, device_info); if(write(device_fd, packet->data, packet->len) < 0) { logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, strerror(errno)); return false; } device_total_out += packet->len; return true; } void dump_device_stats(void) { cp(); logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device); logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in); logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out); }