X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Flinux%2Fdevice.c;h=35c66d55a44ddad0155576cba8f5a9e9a49b6777;hp=08d9364daef97ff848c9e7c034c4fd27350edf54;hb=4c85542894f7fca823b119b05e07179deb24229a;hpb=e449d94caef963809d417f16497f6f978e10d731 diff --git a/src/linux/device.c b/src/linux/device.c index 08d9364d..35c66d55 100644 --- a/src/linux/device.c +++ b/src/linux/device.c @@ -1,7 +1,7 @@ /* device.c -- Interaction with Linux ethertap and tun/tap device - Copyright (C) 2001-2003 Ivo Timmermans , - 2001-2003 Guus Sliepen + Copyright (C) 2001-2005 Ivo Timmermans, + 2001-2009 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 @@ -13,21 +13,15 @@ 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 1.1.2.18 2003/07/17 15:06:27 guus Exp $ + 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., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "system.h" -#ifdef HAVE_TUNTAP -#ifdef LINUX_IF_TUN_H -#include LINUX_IF_TUN_H -#else +#ifdef HAVE_LINUX_IF_TUN_H #include -#endif #define DEFAULT_DEVICE "/dev/net/tun" #else #define DEFAULT_DEVICE "/dev/tap0" @@ -38,105 +32,105 @@ #include "net.h" #include "route.h" #include "utils.h" +#include "xalloc.h" -enum { +typedef enum device_type_t { DEVICE_TYPE_ETHERTAP, DEVICE_TYPE_TUN, DEVICE_TYPE_TAP, -}; +} device_type_t; int device_fd = -1; -int device_type; -char *device; -char *interface; -char ifrname[IFNAMSIZ]; -char *device_info; +static device_type_t device_type; +char *device = NULL; +char *iface = NULL; +static char ifrname[IFNAMSIZ]; +static char *device_info; -int device_total_in = 0; -int device_total_out = 0; +static int device_total_in = 0; +static int device_total_out = 0; -int setup_device(void) -{ +bool setup_device(void) { struct ifreq ifr; - cp(); - if(!get_config_string(lookup_config(config_tree, "Device"), &device)) - device = DEFAULT_DEVICE; + device = xstrdup(DEFAULT_DEVICE); - if(!get_config_string(lookup_config(config_tree, "Interface"), &interface)) -#ifdef HAVE_TUNTAP - interface = netname; + if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) +#ifdef HAVE_LINUX_IF_TUN_H + if (netname != NULL) + iface = xstrdup(netname); #else - interface = rindex(device, '/') ? rindex(device, '/') + 1 : device; + iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device); #endif device_fd = open(device, O_RDWR | O_NONBLOCK); if(device_fd < 0) { - logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno)); - return -1; + logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno)); + return false; } -#ifdef HAVE_TUNTAP +#ifdef HAVE_LINUX_IF_TUN_H /* Ok now check if this is an old ethertap or a new tun/tap thingie */ memset(&ifr, 0, sizeof(ifr)); if(routing_mode == RMODE_ROUTER) { ifr.ifr_flags = IFF_TUN; device_type = DEVICE_TYPE_TUN; - device_info = _("Linux tun/tap device (tun mode)"); + device_info = "Linux tun/tap device (tun mode)"; } else { ifr.ifr_flags = IFF_TAP | IFF_NO_PI; device_type = DEVICE_TYPE_TAP; - device_info = _("Linux tun/tap device (tap mode)"); + device_info = "Linux tun/tap device (tap mode)"; } - if(interface) - strncpy(ifr.ifr_name, interface, IFNAMSIZ); + if(iface) + strncpy(ifr.ifr_name, iface, IFNAMSIZ); - if(!ioctl(device_fd, TUNSETIFF, (void *) &ifr)) { + if(!ioctl(device_fd, TUNSETIFF, &ifr)) { strncpy(ifrname, ifr.ifr_name, IFNAMSIZ); - interface = ifrname; - } else if(!ioctl(device_fd, (('T' << 8) | 202), (void *) &ifr)) { - logger(LOG_WARNING, _("Old ioctl() request was needed for %s"), device); + if(iface) free(iface); + iface = xstrdup(ifrname); + } else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) { + logger(LOG_WARNING, "Old ioctl() request was needed for %s", device); strncpy(ifrname, ifr.ifr_name, IFNAMSIZ); - interface = ifrname; + if(iface) free(iface); + iface = xstrdup(ifrname); } else #endif { if(routing_mode == RMODE_ROUTER) - overwrite_mac = 1; - device_info = _("Linux ethertap device"); + overwrite_mac = true; + device_info = "Linux ethertap device"; device_type = DEVICE_TYPE_ETHERTAP; - interface = rindex(device, '/') ? rindex(device, '/') + 1 : device; + if(iface) + free(iface); + iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device); } - logger(LOG_INFO, _("%s is a %s"), device, device_info); + logger(LOG_INFO, "%s is a %s", device, device_info); - return 0; + return true; } -void close_device(void) -{ - cp(); - +void close_device(void) { close(device_fd); + + free(device); + free(iface); } -int read_packet(vpn_packet_t *packet) -{ +bool read_packet(vpn_packet_t *packet) { int lenin; - cp(); - switch(device_type) { case DEVICE_TYPE_TUN: lenin = read(device_fd, packet->data + 10, MTU - 10); if(lenin <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); - return -1; + return false; } packet->len = lenin + 10; @@ -145,9 +139,9 @@ int read_packet(vpn_packet_t *packet) lenin = read(device_fd, packet->data, MTU); if(lenin <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); - return -1; + return false; } packet->len = lenin; @@ -156,9 +150,9 @@ int read_packet(vpn_packet_t *packet) lenin = read(device_fd, packet->data - 2, MTU + 2); if(lenin <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); - return -1; + return false; } packet->len = lenin - 2; @@ -167,56 +161,50 @@ int read_packet(vpn_packet_t *packet) device_total_in += packet->len; - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, device_info); - return 0; + return true; } -int write_packet(vpn_packet_t *packet) -{ - cp(); - - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"), +bool write_packet(vpn_packet_t *packet) { + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s", packet->len, device_info); switch(device_type) { case DEVICE_TYPE_TUN: packet->data[10] = packet->data[11] = 0; if(write(device_fd, packet->data + 10, packet->len - 10) < 0) { - logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, + logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno)); - return -1; + return false; } break; case DEVICE_TYPE_TAP: if(write(device_fd, packet->data, packet->len) < 0) { - logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, + logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno)); - return -1; + return false; } break; case DEVICE_TYPE_ETHERTAP: *(short int *)(packet->data - 2) = packet->len; if(write(device_fd, packet->data - 2, packet->len + 2) < 0) { - logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, + logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, strerror(errno)); - return -1; + return false; } break; } device_total_out += packet->len; - return 0; + 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); +void dump_device_stats(void) { + 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); }