X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fbsd%2Fdevice.c;h=95e65f9cbfa9bb866f27d95f488ea87e71035047;hp=01b7071a00687ed1b77b383f1af64ec9d82104a3;hb=6714a74b30e1cbf9fe45b14c00d0ebebf8f26c4c;hpb=b069da90d67b49dce041f513a3855b8da3d82f80 diff --git a/src/bsd/device.c b/src/bsd/device.c index 01b7071a..95e65f9c 100644 --- a/src/bsd/device.c +++ b/src/bsd/device.c @@ -1,7 +1,8 @@ /* device.c -- Interaction BSD tun/tap device Copyright (C) 2001-2005 Ivo Timmermans, - 2001-2008 Guus Sliepen + 2001-2016 Guus Sliepen + 2009 Grzegorz Dymarek 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 @@ -13,61 +14,136 @@ 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 1398 2004-11-01 15:18:53Z guus $ + 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" + +#include "../conf.h" +#include "../device.h" +#include "../logger.h" +#include "../net.h" +#include "../route.h" +#include "../utils.h" +#include "../xalloc.h" + +#ifdef ENABLE_TUNEMU +#include "tunemu.h" +#endif -#include "conf.h" -#include "logger.h" -#include "net.h" -#include "route.h" -#include "utils.h" -#include "xalloc.h" +#ifdef HAVE_NET_IF_UTUN_H +#include +#include +#include +#endif -#define DEFAULT_DEVICE "/dev/tun0" +#define DEFAULT_TUN_DEVICE "/dev/tun0" +#define DEFAULT_TAP_DEVICE "/dev/tap0" typedef enum device_type { DEVICE_TYPE_TUN, DEVICE_TYPE_TUNIFHEAD, DEVICE_TYPE_TAP, +#ifdef ENABLE_TUNEMU + DEVICE_TYPE_TUNEMU, +#endif + DEVICE_TYPE_UTUN, } device_type_t; int device_fd = -1; char *device = NULL; char *iface = NULL; static char *device_info = NULL; -static int device_total_in = 0; -static int device_total_out = 0; -#if defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD) +static uint64_t device_total_in = 0; +static uint64_t device_total_out = 0; +#if defined(ENABLE_TUNEMU) +static device_type_t device_type = DEVICE_TYPE_TUNEMU; +#elif defined(HAVE_OPENBSD) || defined(HAVE_FREEBSD) || defined(HAVE_DRAGONFLY) static device_type_t device_type = DEVICE_TYPE_TUNIFHEAD; #else static device_type_t device_type = DEVICE_TYPE_TUN; #endif -bool setup_device(void) { - char *type; +#ifdef HAVE_NET_IF_UTUN_H +static bool setup_utun(void) { + device_fd = socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL); + if(device_fd == -1) { + logger(LOG_ERR, "Could not open PF_SYSTEM socket: %s\n", strerror(errno)); + return false; + } - cp(); + struct ctl_info info = {}; + strlcpy(info.ctl_name, UTUN_CONTROL_NAME, sizeof info.ctl_name); - if(!get_config_string(lookup_config(config_tree, "Device"), &device)) - device = xstrdup(DEFAULT_DEVICE); + if(ioctl(device_fd, CTLIOCGINFO, &info) == -1) { + logger(LOG_ERR, "ioctl(CTLIOCGINFO) failed: %s", strerror(errno)); + return false; + } - if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) - iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device); + int unit = -1; + char *p = strstr(device, "utun"), *e = NULL; + if(p) { + unit = strtol(p + 4, &e, 10); + if(!e) + unit = -1; + } + + struct sockaddr_ctl sc = { + .sc_id = info.ctl_id, + .sc_len = sizeof sc, + .sc_family = AF_SYSTEM, + .ss_sysaddr = AF_SYS_CONTROL, + .sc_unit = unit + 1, + }; - if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) { - logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno)); + if(connect(device_fd, (struct sockaddr *)&sc, sizeof(sc)) == -1) { + logger(LOG_ERR, "Could not connect utun socket: %s\n", strerror(errno)); return false; } + char name[64] = ""; + socklen_t len = sizeof name; + if(getsockopt(device_fd, SYSPROTO_CONTROL, UTUN_OPT_IFNAME, name, &len)) { + iface = xstrdup(device); + } else { + iface = xstrdup(name); + } + + device_info = "OS X utun device"; + + logger(LOG_INFO, "%s is a %s", device, device_info); + + return true; +} +#endif + +static bool setup_device(void) { + // Find out which device file to open + + if(!get_config_string(lookup_config(config_tree, "Device"), &device)) { + if(routing_mode == RMODE_ROUTER) + device = xstrdup(DEFAULT_TUN_DEVICE); + else + device = xstrdup(DEFAULT_TAP_DEVICE); + } + + // Find out if it's supposed to be a tun or a tap device + + char *type; + if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) { if(!strcasecmp(type, "tun")) /* use default */; +#ifdef ENABLE_TUNEMU + else if(!strcasecmp(type, "tunemu")) + device_type = DEVICE_TYPE_TUNEMU; +#endif +#ifdef HAVE_NET_IF_UTUN_H + else if(!strcasecmp(type, "utun")) + device_type = DEVICE_TYPE_UTUN; +#endif else if(!strcasecmp(type, "tunnohead")) device_type = DEVICE_TYPE_TUN; else if(!strcasecmp(type, "tunifhead")) @@ -75,14 +151,73 @@ bool setup_device(void) { else if(!strcasecmp(type, "tap")) device_type = DEVICE_TYPE_TAP; else { - logger(LOG_ERR, _("Unknown device type %s!"), type); + logger(LOG_ERR, "Unknown device type %s!", type); return false; } } else { +#ifdef HAVE_NET_IF_UTUN_H + if(strncmp(device, "utun", 4) == 0 || strncmp(device, "/dev/utun", 9) == 0) + device_type = DEVICE_TYPE_UTUN; + else +#endif if(strstr(device, "tap") || routing_mode != RMODE_ROUTER) device_type = DEVICE_TYPE_TAP; } + if(routing_mode == RMODE_SWITCH && device_type != DEVICE_TYPE_TAP) { + logger(LOG_ERR, "Only tap devices support switch mode!"); + return false; + } + + // Open the device + + switch(device_type) { +#ifdef ENABLE_TUNEMU + case DEVICE_TYPE_TUNEMU: { + char dynamic_name[256] = ""; + device_fd = tunemu_open(dynamic_name); + } + break; +#endif +#ifdef HAVE_NET_IF_UTUN_H + case DEVICE_TYPE_UTUN: + return setup_utun(); +#endif + default: + device_fd = open(device, O_RDWR | O_NONBLOCK); + } + + if(device_fd < 0) { + logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno)); + return false; + } + +#ifdef FD_CLOEXEC + fcntl(device_fd, F_SETFD, FD_CLOEXEC); +#endif + + // Guess what the corresponding interface is called + + char *realname = NULL; + +#if defined(HAVE_FDEVNAME) + realname = fdevname(device_fd); +#elif defined(HAVE_DEVNAME) + struct stat buf; + if(!fstat(device_fd, &buf)) + realname = devname(buf.st_rdev, S_IFCHR); +#endif + + if(!realname) + realname = device; + + if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) + iface = xstrdup(strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname); + else if(strcmp(iface, strrchr(realname, '/') ? strrchr(realname, '/') + 1 : realname)) + logger(LOG_WARNING, "Warning: Interface does not match Device. $INTERFACE might be set incorrectly."); + + // Configure the device as best as we can + switch(device_type) { default: device_type = DEVICE_TYPE_TUN; @@ -91,7 +226,7 @@ bool setup_device(void) { { const int zero = 0; if(ioctl(device_fd, TUNSIFHEAD, &zero, sizeof zero) == -1) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "ioctl", strerror(errno)); + logger(LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno)); return false; } } @@ -103,14 +238,14 @@ bool setup_device(void) { } #endif - device_info = _("Generic BSD tun device"); + device_info = "Generic BSD tun device"; break; case DEVICE_TYPE_TUNIFHEAD: #ifdef TUNSIFHEAD { const int one = 1; if(ioctl(device_fd, TUNSIFHEAD, &one, sizeof one) == -1) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "ioctl", strerror(errno)); + logger(LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno)); return false; } } @@ -122,35 +257,71 @@ bool setup_device(void) { } #endif - device_info = _("Generic BSD tun device"); + device_info = "Generic BSD tun device"; break; case DEVICE_TYPE_TAP: if(routing_mode == RMODE_ROUTER) overwrite_mac = true; - device_info = _("Generic BSD tap device"); + device_info = "Generic BSD tap device"; +#ifdef TAPGIFNAME + { + struct ifreq ifr; + if(ioctl(device_fd, TAPGIFNAME, (void*)&ifr) == 0) { + if(iface) + free(iface); + iface = xstrdup(ifr.ifr_name); + } + } + +#endif break; +#ifdef ENABLE_TUNEMU + case DEVICE_TYPE_TUNEMU: + device_info = "BSD tunemu device"; + break; +#endif } - logger(LOG_INFO, _("%s is a %s"), device, device_info); +#ifdef SIOCGIFADDR + if(overwrite_mac) + ioctl(device_fd, SIOCGIFADDR, mymac.x); +#endif + + logger(LOG_INFO, "%s is a %s", device, device_info); return true; } -void close_device(void) { - cp(); +static void close_device(void) { + switch(device_type) { +#ifdef ENABLE_TUNEMU + case DEVICE_TYPE_TUNEMU: + tunemu_close(device_fd); + break; +#endif + default: + close(device_fd); + } - close(device_fd); + free(device); + free(iface); } -bool read_packet(vpn_packet_t *packet) { +static bool read_packet(vpn_packet_t *packet) { int lenin; - cp(); - switch(device_type) { case DEVICE_TYPE_TUN: - if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, +#ifdef ENABLE_TUNEMU + case DEVICE_TYPE_TUNEMU: + if(device_type == DEVICE_TYPE_TUNEMU) + lenin = tunemu_read(device_fd, packet->data + 14, MTU - 14); + else +#endif + lenin = read(device_fd, packet->data + 14, MTU - 14); + + if(lenin <= 0) { + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); return false; } @@ -166,49 +337,47 @@ bool read_packet(vpn_packet_t *packet) { break; default: ifdebug(TRAFFIC) logger(LOG_ERR, - _ ("Unknown IP version %d while reading packet from %s %s"), + "Unknown IP version %d while reading packet from %s %s", packet->data[14] >> 4, device_info, device); return false; } + memset(packet->data, 0, 12); packet->len = lenin + 14; break; + case DEVICE_TYPE_UTUN: case DEVICE_TYPE_TUNIFHEAD: { - u_int32_t type; - struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, MTU - 14}}; - - if((lenin = readv(device_fd, vector, 2)) <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, + if((lenin = read(device_fd, packet->data + 10, MTU - 10)) <= 0) { + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); return false; } - switch (ntohl(type)) { - case AF_INET: + switch(packet->data[14] >> 4) { + case 4: packet->data[12] = 0x08; packet->data[13] = 0x00; break; - - case AF_INET6: + case 6: packet->data[12] = 0x86; packet->data[13] = 0xDD; break; - default: ifdebug(TRAFFIC) logger(LOG_ERR, - _ ("Unknown address family %x while reading packet from %s %s"), - ntohl(type), device_info, device); + "Unknown IP version %d while reading packet from %s %s", + packet->data[14] >> 4, device_info, device); return false; } + memset(packet->data, 0, 12); packet->len = lenin + 10; break; } case DEVICE_TYPE_TAP: if((lenin = read(device_fd, packet->data, MTU)) <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); return false; } @@ -222,34 +391,29 @@ bool read_packet(vpn_packet_t *packet) { device_total_in += packet->len; - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), + 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"), +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: if(write(device_fd, packet->data + 14, packet->len - 14) < 0) { - logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, + logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, strerror(errno)); return false; } break; + case DEVICE_TYPE_UTUN: case DEVICE_TYPE_TUNIFHEAD: { - u_int32_t type; - struct iovec vector[2] = {{&type, sizeof(type)}, {packet->data + 14, packet->len - 14}}; - int af; - - af = (packet->data[12] << 8) + packet->data[13]; + int af = (packet->data[12] << 8) + packet->data[13]; + uint32_t type; switch (af) { case 0x0800: @@ -260,13 +424,15 @@ bool write_packet(vpn_packet_t *packet) break; default: ifdebug(TRAFFIC) logger(LOG_ERR, - _("Unknown address family %x while writing packet to %s %s"), + "Unknown address family %x while writing packet to %s %s", af, device_info, device); return false; } - if(writev(device_fd, vector, 2) < 0) { - logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, + memcpy(packet->data + 10, &type, sizeof type); + + 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; } @@ -275,12 +441,22 @@ bool write_packet(vpn_packet_t *packet) case DEVICE_TYPE_TAP: if(write(device_fd, packet->data, packet->len) < 0) { - logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, + logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, strerror(errno)); return false; } break; +#ifdef ENABLE_TUNEMU + case DEVICE_TYPE_TUNEMU: + if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) { + logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, + device, strerror(errno)); + return false; + } + break; +#endif + default: return false; } @@ -290,11 +466,16 @@ bool write_packet(vpn_packet_t *packet) 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, +};