/*
device.c -- Interaction with Windows tap driver in a MinGW environment
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2013 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2014 Guus Sliepen <guus@tinc-vpn.org>
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
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "system.h"
+#include "../system.h"
#include <windows.h>
#include <winioctl.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"
+#include "../conf.h"
+#include "../device.h"
+#include "../logger.h"
+#include "../names.h"
+#include "../net.h"
+#include "../route.h"
+#include "../utils.h"
+#include "../xalloc.h"
-#include "mingw/common.h"
+#include "common.h"
int device_fd = -1;
static HANDLE device_handle = INVALID_HANDLE_VALUE;
+static io_t device_read_io;
+static OVERLAPPED device_read_overlapped;
+static vpn_packet_t device_read_packet;
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;
-
extern char *myport;
-static DWORD WINAPI tapreader(void *bla) {
- int status;
- DWORD len;
- OVERLAPPED overlapped;
- vpn_packet_t packet;
-
- logger(DEBUG_ALWAYS, LOG_DEBUG, "Tap reader running");
-
- /* Read from tap device and send to parent */
+static void device_issue_read() {
+ device_read_overlapped.Offset = 0;
+ device_read_overlapped.OffsetHigh = 0;
- overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
-
- for(;;) {
- overlapped.Offset = 0;
- overlapped.OffsetHigh = 0;
- ResetEvent(overlapped.hEvent);
-
- status = ReadFile(device_handle, (void *)packet.data, MTU, &len, &overlapped);
-
- if(!status) {
- if(GetLastError() == ERROR_IO_PENDING) {
- WaitForSingleObject(overlapped.hEvent, INFINITE);
- if(!GetOverlappedResult(device_handle, &overlapped, &len, FALSE))
- continue;
- } else {
+ int status;
+ for (;;) {
+ DWORD len;
+ status = ReadFile(device_handle, (void *)device_read_packet.data, MTU, &len, &device_read_overlapped);
+ if (!status) {
+ if (GetLastError() != ERROR_IO_PENDING)
logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
- return -1;
- }
+ break;
}
- EnterCriticalSection(&mutex);
- packet.len = len;
- packet.priority = 0;
- route(myself, &packet);
- LeaveCriticalSection(&mutex);
+ device_read_packet.len = len;
+ device_read_packet.priority = 0;
+ route(myself, &device_read_packet);
+ }
+}
+
+static void device_handle_read(void *data, int flags) {
+ ResetEvent(device_read_overlapped.hEvent);
+
+ DWORD len;
+ if (!GetOverlappedResult(device_handle, &device_read_overlapped, &len, FALSE)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error getting read result from %s %s: %s", device_info,
+ device, strerror(errno));
+ return;
}
+
+ device_read_packet.len = len;
+ device_read_packet.priority = 0;
+ route(myself, &device_read_packet);
+ device_issue_read();
}
static bool setup_device(void) {
char adaptername[1024];
char tapname[1024];
DWORD len;
- unsigned long status;
bool found = false;
int err;
- HANDLE thread;
get_config_string(lookup_config(config_tree, "Device"), &device);
get_config_string(lookup_config(config_tree, "Interface"), &iface);
overwrite_mac = 1;
}
- /* Start the tap reader */
+ device_info = "Windows tap device";
- thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL);
+ logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info);
- if(!thread) {
- logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError()));
- return false;
- }
+ return true;
+}
- /* Set media status for newer TAP-Win32 devices */
+static void enable_device(void) {
+ logger(DEBUG_ALWAYS, LOG_INFO, "Enabling %s", device_info);
- status = true;
+ ULONG status = 1;
+ DWORD len;
DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL);
- device_info = "Windows tap device";
+ io_add_event(&device_read_io, device_handle_read, NULL, CreateEvent(NULL, TRUE, FALSE, NULL));
+ device_read_overlapped.hEvent = device_read_io.event;
+ device_issue_read();
+}
- logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info);
+static void disable_device(void) {
+ logger(DEBUG_ALWAYS, LOG_INFO, "Disabling %s", device_info);
- return true;
+ io_del(&device_read_io);
+ CancelIo(device_handle);
+ CloseHandle(device_read_overlapped.hEvent);
+
+ ULONG status = 0;
+ DWORD len;
+ DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL);
}
static void close_device(void) {
- CloseHandle(device_handle);
+ CloseHandle(device_handle); device_handle = INVALID_HANDLE_VALUE;
- free(device);
- free(iface);
+ free(device); device = NULL;
+ free(iface); iface = NULL;
+ device_info = NULL;
}
static bool read_packet(vpn_packet_t *packet) {
logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s",
packet->len, device_info);
- if(!WriteFile(device_handle, packet->data, packet->len, &outlen, &overlapped)) {
+ if(!WriteFile(device_handle, DATA(packet), packet->len, &outlen, &overlapped)) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError()));
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,
+ .enable = enable_device,
+ .disable = disable_device,
};
projects / tinc / blobdiff