X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Flinux%2Fdevice.c;h=f75f4bdb741ca58c5f9b0df32fa7fdf3b71764ef;hp=08d9364daef97ff848c9e7c034c4fd27350edf54;hb=3fae14fae5a347823679ef694ab630b4991a201d;hpb=e449d94caef963809d417f16497f6f978e10d731 diff --git a/src/linux/device.c b/src/linux/device.c index 08d9364d..f75f4bdb 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, + 2001-2014 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 @@ -13,210 +13,256 @@ 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" +#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" #endif -#include "conf.h" -#include "logger.h" -#include "net.h" -#include "route.h" -#include "utils.h" +#include "../conf.h" +#include "../device.h" +#include "../logger.h" +#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 *type = NULL; +static char ifrname[IFNAMSIZ]; +static char *device_info; -int device_total_in = 0; -int device_total_out = 0; +static uint64_t device_total_in = 0; +static uint64_t device_total_out = 0; -int setup_device(void) -{ +static bool setup_device(void) { struct ifreq ifr; + bool t1q = false; - cp(); + if(!get_config_string(lookup_config(config_tree, "Device"), &device)) { + device = xstrdup(DEFAULT_DEVICE); + } - if(!get_config_string(lookup_config(config_tree, "Device"), &device)) - device = DEFAULT_DEVICE; + if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) +#ifdef HAVE_LINUX_IF_TUN_H + if(netname != NULL) { + iface = xstrdup(netname); + } - if(!get_config_string(lookup_config(config_tree, "Interface"), &interface)) -#ifdef HAVE_TUNTAP - interface = netname; #else - interface = rindex(device, '/') ? rindex(device, '/') + 1 : device; + iface = xstrdup(strrchr(device, '/') ? strrchr(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 FD_CLOEXEC + fcntl(device_fd, F_SETFD, FD_CLOEXEC); +#endif + +#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) { + + get_config_string(lookup_config(config_tree, "DeviceType"), &type); + + if(type && strcasecmp(type, "tun") && strcasecmp(type, "tap")) { + logger(LOG_ERR, "Unknown device type %s!", type); + return false; + } + + if((type && !strcasecmp(type, "tun")) || (!type && 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 { + if(routing_mode == RMODE_ROUTER) { + overwrite_mac = true; + } + 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)"; + } + +#ifdef IFF_ONE_QUEUE + + /* Set IFF_ONE_QUEUE flag... */ + if(get_config_bool(lookup_config(config_tree, "IffOneQueue"), &t1q) && t1q) { + ifr.ifr_flags |= IFF_ONE_QUEUE; } - if(interface) - strncpy(ifr.ifr_name, interface, IFNAMSIZ); +#endif - if(!ioctl(device_fd, TUNSETIFF, (void *) &ifr)) { + if(iface) { + strncpy(ifr.ifr_name, iface, IFNAMSIZ); + ifr.ifr_name[IFNAMSIZ - 1] = 0; + } + + 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); + ifrname[IFNAMSIZ - 1] = 0; + 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; + ifrname[IFNAMSIZ - 1] = 0; + free(iface); + iface = xstrdup(ifrname); } else #endif { - if(routing_mode == RMODE_ROUTER) - overwrite_mac = 1; - device_info = _("Linux ethertap device"); + if(routing_mode == RMODE_ROUTER) { + overwrite_mac = true; + } + + device_info = "Linux ethertap device"; device_type = DEVICE_TYPE_ETHERTAP; - interface = rindex(device, '/') ? rindex(device, '/') + 1 : device; + free(iface); + iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device); + } + + if(overwrite_mac && !ioctl(device_fd, SIOCGIFHWADDR, &ifr)) { + memcpy(mymac.x, ifr.ifr_hwaddr.sa_data, ETH_ALEN); } - 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(); - +static void close_device(void) { close(device_fd); + + free(type); + free(device); + free(iface); } -int read_packet(vpn_packet_t *packet) -{ +static 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"), - device_info, device, strerror(errno)); - return -1; - } - - packet->len = lenin + 10; - break; - case DEVICE_TYPE_TAP: - lenin = read(device_fd, packet->data, MTU); - - if(lenin <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), - device_info, device, strerror(errno)); - return -1; - } - - packet->len = lenin; - break; - case DEVICE_TYPE_ETHERTAP: - lenin = read(device_fd, packet->data - 2, MTU + 2); - - if(lenin <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), - device_info, device, strerror(errno)); - return -1; - } - - packet->len = lenin - 2; - break; + 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", + device_info, device, strerror(errno)); + return false; + } + + memset(packet->data, 0, 12); + packet->len = lenin + 10; + break; + + case DEVICE_TYPE_TAP: + lenin = read(device_fd, packet->data, MTU); + + if(lenin <= 0) { + logger(LOG_ERR, "Error while reading from %s %s: %s", + device_info, device, strerror(errno)); + return false; + } + + packet->len = lenin; + break; + + case DEVICE_TYPE_ETHERTAP: + lenin = read(device_fd, packet->data - 2, MTU + 2); + + if(lenin <= 0) { + logger(LOG_ERR, "Error while reading from %s %s: %s", + device_info, device, strerror(errno)); + return false; + } + + packet->len = lenin - 2; + break; } device_total_in += packet->len; - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, - device_info); + 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"), - packet->len, device_info); +static 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, - strerror(errno)); - return -1; - } - 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, - strerror(errno)); - return -1; - } - 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, - strerror(errno)); - return -1; - } - break; + 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, + strerror(errno)); + 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, + strerror(errno)); + return false; + } + + break; + + case DEVICE_TYPE_ETHERTAP: + memcpy(packet->data - 2, &packet->len, 2); + + if(write(device_fd, packet->data - 2, packet->len + 2) < 0) { + logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device, + strerror(errno)); + 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); +static void dump_device_stats(void) { + logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device); + logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in); + logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out); } + +const devops_t os_devops = { + .setup = setup_device, + .close = close_device, + .read = read_packet, + .write = write_packet, + .dump_stats = dump_device_stats, +};