X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fbsd%2Fdevice.c;h=d1a993bb5d9dda921454d93fe5b69996c45ecc5d;hb=6b92ac505d2cd5c7e390d49bf1f0b399ef9f8327;hp=f8a559686f75b7b55a2b7b1b1309450a7761a264;hpb=19be9cf7150858311f7898fa3fb525d692d02f64;p=tinc diff --git a/src/bsd/device.c b/src/bsd/device.c index f8a55968..d1a993bb 100644 --- a/src/bsd/device.c +++ b/src/bsd/device.c @@ -1,7 +1,7 @@ /* device.c -- Interaction BSD tun/tap device Copyright (C) 2001-2005 Ivo Timmermans, - 2001-2012 Guus Sliepen + 2001-2014 Guus Sliepen 2009 Grzegorz Dymarek This program is free software; you can redistribute it and/or modify @@ -19,27 +19,33 @@ 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" +#include "../conf.h" +#include "../device.h" +#include "../logger.h" +#include "../names.h" +#include "../net.h" +#include "../route.h" +#include "../utils.h" +#include "../xalloc.h" -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU #include "bsd/tunemu.h" #endif -#define DEFAULT_DEVICE "/dev/tun0" +#define DEFAULT_TUN_DEVICE "/dev/tun0" +#if defined(HAVE_DARWIN) || defined(HAVE_FREEBSD) || defined(HAVE_NETBSD) +#define DEFAULT_TAP_DEVICE "/dev/tap0" +#else +#define DEFAULT_TAP_DEVICE "/dev/tun0" +#endif typedef enum device_type { DEVICE_TYPE_TUN, DEVICE_TYPE_TUNIFHEAD, DEVICE_TYPE_TAP, -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU DEVICE_TYPE_TUNEMU, #endif } device_type_t; @@ -48,9 +54,7 @@ int device_fd = -1; char *device = NULL; char *iface = NULL; static char *device_info = NULL; -static uint64_t device_total_in = 0; -static uint64_t device_total_out = 0; -#if defined(TUNEMU) +#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; @@ -59,18 +63,13 @@ static device_type_t device_type = DEVICE_TYPE_TUN; #endif static bool setup_device(void) { - char *type; - - if(!get_config_string(lookup_config(config_tree, "Device"), &device)) - device = xstrdup(DEFAULT_DEVICE); - - if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) - iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device); + get_config_string(lookup_config(config_tree, "Device"), &device); + char *type; if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) { if(!strcasecmp(type, "tun")) - /* use default */; -#ifdef HAVE_TUNEMU + /* use default */; +#ifdef ENABLE_TUNEMU else if(!strcasecmp(type, "tunemu")) device_type = DEVICE_TYPE_TUNEMU; #endif @@ -85,15 +84,34 @@ static bool setup_device(void) { return false; } } else { - if(strstr(device, "tap") || routing_mode != RMODE_ROUTER) + if((device && strstr(device, "tap")) || routing_mode != RMODE_ROUTER) device_type = DEVICE_TYPE_TAP; } + if(!device) { + if(device_type == DEVICE_TYPE_TAP) + device = xstrdup(DEFAULT_TAP_DEVICE); + else + device = xstrdup(DEFAULT_TUN_DEVICE); + } + + if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) + iface = NULL; +#ifndef TAPGIFNAME + if (iface) { + logger(DEBUG_ALWAYS, LOG_WARNING, "Ignoring specified interface name '%s' as device rename is not supported on this platform", iface); + free(iface); + iface = NULL; + } +#endif + if (!iface) + iface = xstrdup(strrchr(device, '/') ? strrchr(device, '/') + 1 : device); + switch(device_type) { -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU case DEVICE_TYPE_TUNEMU: { char dynamic_name[256] = ""; - device_fd = tunemu_open(dynamic_name); + device_fd = tunemu_open(dynamic_name); } break; #endif @@ -115,7 +133,7 @@ static bool setup_device(void) { device_type = DEVICE_TYPE_TUN; case DEVICE_TYPE_TUN: #ifdef TUNSIFHEAD - { + { const int zero = 0; if(ioctl(device_fd, TUNSIFHEAD, &zero, sizeof zero) == -1) { logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "ioctl", strerror(errno)); @@ -164,12 +182,12 @@ static bool setup_device(void) { iface = xstrdup(ifr.ifr_name); } } - + #endif break; -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU case DEVICE_TYPE_TUNEMU: - device_info = "BSD tunemu device"; + device_info = "BSD tunemu device"; break; #endif } @@ -181,7 +199,7 @@ static bool setup_device(void) { static void close_device(void) { switch(device_type) { -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU case DEVICE_TYPE_TUNEMU: tunemu_close(device_fd); break; @@ -189,9 +207,11 @@ static void close_device(void) { default: close(device_fd); } + device_fd = -1; - free(device); - free(iface); + free(device); device = NULL; + free(iface); iface = NULL; + device_info = NULL; } static bool read_packet(vpn_packet_t *packet) { @@ -199,13 +219,13 @@ static bool read_packet(vpn_packet_t *packet) { switch(device_type) { case DEVICE_TYPE_TUN: -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU case DEVICE_TYPE_TUNEMU: if(device_type == DEVICE_TYPE_TUNEMU) - inlen = tunemu_read(device_fd, packet->data + 14, MTU - 14); + inlen = tunemu_read(device_fd, DATA(packet) + 14, MTU - 14); else #endif - inlen = read(device_fd, packet->data + 14, MTU - 14); + inlen = read(device_fd, DATA(packet) + 14, MTU - 14); if(inlen <= 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, @@ -213,28 +233,29 @@ static bool read_packet(vpn_packet_t *packet) { return false; } - switch(packet->data[14] >> 4) { + switch(DATA(packet)[14] >> 4) { case 4: - packet->data[12] = 0x08; - packet->data[13] = 0x00; + DATA(packet)[12] = 0x08; + DATA(packet)[13] = 0x00; break; case 6: - packet->data[12] = 0x86; - packet->data[13] = 0xDD; + DATA(packet)[12] = 0x86; + DATA(packet)[13] = 0xDD; break; default: logger(DEBUG_TRAFFIC, LOG_ERR, "Unknown IP version %d while reading packet from %s %s", - packet->data[14] >> 4, device_info, device); + DATA(packet)[14] >> 4, device_info, device); return false; } + memset(DATA(packet), 0, 12); packet->len = inlen + 14; break; case DEVICE_TYPE_TUNIFHEAD: { u_int32_t type; - struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, MTU - 14}}; + struct iovec vector[2] = {{&type, sizeof type}, {DATA(packet) + 14, MTU - 14}}; if((inlen = readv(device_fd, vector, 2)) <= 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, @@ -244,13 +265,13 @@ static bool read_packet(vpn_packet_t *packet) { switch (ntohl(type)) { case AF_INET: - packet->data[12] = 0x08; - packet->data[13] = 0x00; + DATA(packet)[12] = 0x08; + DATA(packet)[13] = 0x00; break; case AF_INET6: - packet->data[12] = 0x86; - packet->data[13] = 0xDD; + DATA(packet)[12] = 0x86; + DATA(packet)[13] = 0xDD; break; default: @@ -260,12 +281,13 @@ static bool read_packet(vpn_packet_t *packet) { return false; } + memset(DATA(packet), 0, 12); packet->len = inlen + 10; break; } case DEVICE_TYPE_TAP: - if((inlen = read(device_fd, packet->data, MTU)) <= 0) { + if((inlen = read(device_fd, DATA(packet), MTU)) <= 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); return false; @@ -277,8 +299,6 @@ static bool read_packet(vpn_packet_t *packet) { default: return false; } - - device_total_in += packet->len; logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, device_info); @@ -292,7 +312,7 @@ static bool write_packet(vpn_packet_t *packet) { switch(device_type) { case DEVICE_TYPE_TUN: - if(write(device_fd, packet->data + 14, packet->len - 14) < 0) { + if(write(device_fd, DATA(packet) + 14, packet->len - 14) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, strerror(errno)); return false; @@ -301,10 +321,10 @@ static bool write_packet(vpn_packet_t *packet) { case DEVICE_TYPE_TUNIFHEAD: { u_int32_t type; - struct iovec vector[2] = {{&type, sizeof type}, {packet->data + 14, packet->len - 14}}; + struct iovec vector[2] = {{&type, sizeof type}, {DATA(packet) + 14, packet->len - 14}}; int af; - - af = (packet->data[12] << 8) + packet->data[13]; + + af = (DATA(packet)[12] << 8) + DATA(packet)[13]; switch (af) { case 0x0800: @@ -327,18 +347,18 @@ static bool write_packet(vpn_packet_t *packet) { } break; } - + case DEVICE_TYPE_TAP: - if(write(device_fd, packet->data, packet->len) < 0) { + if(write(device_fd, DATA(packet), packet->len) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, strerror(errno)); return false; } break; -#ifdef HAVE_TUNEMU +#ifdef ENABLE_TUNEMU case DEVICE_TYPE_TUNEMU: - if(tunemu_write(device_fd, packet->data + 14, packet->len - 14) < 0) { + if(tunemu_write(device_fd, DATA(packet) + 14, packet->len - 14) < 0) { logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, strerror(errno)); return false; @@ -350,21 +370,12 @@ static bool write_packet(vpn_packet_t *packet) { return false; } - device_total_out += packet->len; - return true; } -static void dump_device_stats(void) { - logger(DEBUG_ALWAYS, LOG_DEBUG, "Statistics for %s %s:", device_info, device); - logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in); - logger(DEBUG_ALWAYS, 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, };