/* device.c -- Interaction with Solaris 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 1.1.2.12 2003/06/11 19:28:38 guus Exp $ */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DEFAULT_DEVICE "/dev/tun" #include #include "conf.h" #include "net.h" #include "subnet.h" #include "system.h" int device_fd = -1; int device_type; char *device = NULL; char *interface = NULL; char ifrname[IFNAMSIZ]; char *device_info = NULL; int device_total_in = 0; int device_total_out = 0; int setup_device(void) { int ip_fd = -1, if_fd = -1; int ppa; char *ptr; cp(); if(!get_config_string(lookup_config(config_tree, "Device"), &device)) device = DEFAULT_DEVICE; if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) { syslog(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno)); return -1; } ppa = 0; ptr = device; while(*ptr && !isdigit((int) *ptr)) ptr++; ppa = atoi(ptr); if((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) { syslog(LOG_ERR, _("Could not open /dev/ip: %s"), strerror(errno)); return -1; } /* Assign a new PPA and get its unit number. */ if((ppa = ioctl(device_fd, TUNNEWPPA, ppa)) < 0) { syslog(LOG_ERR, _("Can't assign new interface: %s"), strerror(errno)); return -1; } if((if_fd = open(device, O_RDWR, 0)) < 0) { syslog(LOG_ERR, _("Could not open %s twice: %s"), device, strerror(errno)); return -1; } if(ioctl(if_fd, I_PUSH, "ip") < 0) { syslog(LOG_ERR, _("Can't push IP module: %s"), strerror(errno)); return -1; } /* Assign ppa according to the unit number returned by tun device */ if(ioctl(if_fd, IF_UNITSEL, (char *) &ppa) < 0) { syslog(LOG_ERR, _("Can't set PPA %d: %s"), ppa, strerror(errno)); return -1; } if(ioctl(ip_fd, I_LINK, if_fd) < 0) { syslog(LOG_ERR, _("Can't link TUN device to IP: %s"), strerror(errno)); return -1; } if(!get_config_string(lookup_config(config_tree, "Interface"), &interface)) asprintf(&interface, "tun%d", ppa); device_info = _("Solaris tun device"); syslog(LOG_INFO, _("%s is a %s"), device, device_info); return 0; } void close_device(void) { cp(); close(device_fd); } int read_packet(vpn_packet_t *packet) { int lenin; cp(); if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) { syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno)); return -1; } packet->data[12] = 0x08; packet->data[13] = 0x00; packet->len = lenin + 14; 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; } int write_packet(vpn_packet_t *packet) { cp(); if(debug_lvl >= DEBUG_TRAFFIC) syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"), packet->len, device_info); if(write(device_fd, packet->data + 14, packet->len - 14) < 0) { syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, packet->len, strerror(errno)); return -1; } device_total_out += packet->len; return 0; } 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); }