From 922e5b7beaad5bb3fcbfa6b8dd13c05bda29e5fa Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Mon, 1 Nov 2004 15:18:53 +0000 Subject: [PATCH] Support alternative tun/tap driver from http://www-user.rhrk.uni-kl.de/~nissler/tuntap/ --- src/darwin/device.c | 105 +++++++++++++++++++++++++++++++++++++------- 1 file changed, 90 insertions(+), 15 deletions(-) diff --git a/src/darwin/device.c b/src/darwin/device.c index f787f155..c3f3c0b8 100644 --- a/src/darwin/device.c +++ b/src/darwin/device.c @@ -25,19 +25,28 @@ #include "conf.h" #include "logger.h" #include "net.h" +#include "route.h" #include "utils.h" #define DEFAULT_DEVICE "/dev/tun0" +typedef enum device_type { + DEVICE_TYPE_TUN, + DEVICE_TYPE_TAP, +} device_type_t; + int device_fd = -1; char *device; char *iface; char *device_info; int device_total_in = 0; int device_total_out = 0; +static device_type_t device_type = DEVICE_TYPE_TUN; bool setup_device(void) { + char *type; + cp(); if(!get_config_string(lookup_config(config_tree, "Device"), &device)) @@ -51,7 +60,32 @@ bool setup_device(void) return false; } - device_info = _("MacOS/X tun device"); + if(get_config_string(lookup_config(config_tree, "DeviceType"), &type)) { + if(!strcasecmp(type, "tun")) + device_type = DEVICE_TYPE_TUN; + else if(!strcasecmp(type, "tap")) + device_type = DEVICE_TYPE_TAP; + else { + logger(LOG_ERR, _("Unknown device type %s!"), type); + return false; + } + } else { + if(strstr(device, "tap")) + device_type = DEVICE_TYPE_TAP; + } + + switch(device_type) { + default: + device_type = DEVICE_TYPE_TUN; + case DEVICE_TYPE_TUN: + device_info = _("MacOS/X tun device"); + break; + case DEVICE_TYPE_TAP: + if(routing_mode == RMODE_ROUTER) + overwrite_mac = true; + device_info = _("MacOS/X tap device"); + break; + } logger(LOG_INFO, _("%s is a %s"), device, device_info); @@ -71,17 +105,45 @@ bool read_packet(vpn_packet_t *packet) cp(); - if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, - device, strerror(errno)); - return false; + 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, + device, strerror(errno)); + return false; + } + + switch(packet->data[14] >> 4) { + case 4: + packet->data[12] = 0x08; + packet->data[13] = 0x00; + break; + case 6: + packet->data[12] = 0x86; + packet->data[13] = 0xDD; + break; + default: + ifdebug(TRAFFIC) logger(LOG_ERR, + _ ("Unknown IP type %d while reading packet from %s %s"), + packet->data[14] >> 4, device_info, device); + return false; + } + + packet->len = lenin + 14; + 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, + device, strerror(errno)); + return false; + } + + packet->len = lenin; + break; + default: + return false; } - - packet->data[12] = 0x08; - packet->data[13] = 0x00; - - packet->len = lenin + 14; - + device_total_in += packet->len; ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), @@ -97,10 +159,23 @@ bool write_packet(vpn_packet_t *packet) ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"), packet->len, device_info); - if(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; + 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, + device, strerror(errno)); + return false; + } + break; + 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, + device, strerror(errno)); + return false; + } + break; + default: + return false; } device_total_out += packet->len; -- 2.20.1