X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Flinux%2Fdevice.c;h=4e9591c21c1f8f2a8ae48e5e8eda8cfd16806f54;hp=ea66384604fef2849d42e17a4a403410c38748b2;hb=6b415a1a7f5bad2fff7b133ef2a2febccb96d6e5;hpb=12de5a8eedd985f4732e88de6185f77a8244612c diff --git a/src/linux/device.c b/src/linux/device.c index ea663846..4e9591c2 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) 2001-2002 Ivo Timmermans , - 2001-2002 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 @@ -17,83 +17,65 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: device.c,v 1.1.2.15 2003/06/11 19:28:37 guus Exp $ + $Id$ */ -#include "config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef HAVE_TUNTAP -#ifdef LINUX_IF_TUN_H -#include LINUX_IF_TUN_H -#else +#include "system.h" + +#ifdef HAVE_LINUX_IF_TUN_H #include -#endif #define DEFAULT_DEVICE "/dev/net/tun" #else #define DEFAULT_DEVICE "/dev/tap0" #endif -#include #include "conf.h" +#include "logger.h" #include "net.h" -#include "subnet.h" #include "route.h" +#include "utils.h" +#include "xalloc.h" -#include "system.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; -/* - open the local ethertap device -*/ -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) { - syslog(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)); @@ -107,29 +89,33 @@ int setup_device(void) 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)) { - syslog(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; + 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); } - syslog(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) @@ -137,13 +123,12 @@ void close_device(void) cp(); close(device_fd); + + free(device); + free(iface); } -/* - read, encrypt and send data that is - available through the ethertap device -*/ -int read_packet(vpn_packet_t *packet) +bool read_packet(vpn_packet_t *packet) { int lenin; @@ -154,9 +139,9 @@ int read_packet(vpn_packet_t *packet) lenin = read(device_fd, packet->data + 10, MTU - 10); if(lenin <= 0) { - syslog(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; @@ -165,9 +150,9 @@ int read_packet(vpn_packet_t *packet) lenin = read(device_fd, packet->data, MTU); if(lenin <= 0) { - syslog(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; @@ -176,9 +161,9 @@ int read_packet(vpn_packet_t *packet) lenin = read(device_fd, packet->data - 2, MTU + 2); if(lenin <= 0) { - syslog(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; @@ -187,59 +172,56 @@ int read_packet(vpn_packet_t *packet) device_total_in += packet->len; - if(debug_lvl >= DEBUG_TRAFFIC) { - syslog(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) +bool write_packet(vpn_packet_t *packet) { cp(); - if(debug_lvl >= DEBUG_TRAFFIC) - syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"), + 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) { - syslog(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) { - syslog(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) { - syslog(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(); - 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); + 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); }