[ViewVC] Diff of: cvs/gvpe/src/device-cygwin.C

Comparing gvpe/src/device-cygwin.C (file contents):
Revision 1.5 by pcg, Wed Oct 15 01:38:24 2003 UTC vs.
Revision 1.8 by pcg, Thu Jan 29 18:55:10 2004 UTC

…		…
1	/*	1	/*
2	device-cygwin.C -- Stub for Cygwin environment	2	device-cygwin.C -- Stub for Cygwin environment
3	Copyright (C) 2003 Marc Lehmann <ocg@goof.com>	3	Copyright (C) 2003-2004 Marc Lehmann <ocg@goof.com>
4	Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,	4	Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,
5	2002-2003 Guus Sliepen <guus@sliepen.eu.org>	5	2002-2003 Guus Sliepen <guus@sliepen.eu.org>
6		6
7	This program is free software; you can redistribute it and/or modify	7	This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by	8	it under the terms of the GNU General Public License as published by
28	// a newer driver is available as part of the openvpn package:	28	// a newer driver is available as part of the openvpn package:
29	// http://openvpn.sf.net/	29	// http://openvpn.sf.net/
30		30
31	#include "config.h"	31	#include "config.h"
32		32
33	#include <stdio.h>	33	#include <cstdio>
		34	#include <cstring>
		35	#include <cstdlib>
34	#include <errno.h>	36	#include <errno.h>
35	#include <sys/types.h>	37	#include <sys/types.h>
36	#include <sys/stat.h>	38	#include <sys/stat.h>
37	#include <fcntl.h>	39	#include <fcntl.h>
38	#include <unistd.h>	40	#include <unistd.h>
39	#include <syslog.h>
40	#include <cstring>
41		41
42	#include "conf.h"	42	#include "conf.h"
43	#include "util.h"	43	#include "util.h"
44		44
		45	#include <io.h>
45	#include <w32api/windows.h>	46	#include <w32api/windows.h>
46	#include <w32api/winioctl.h>	47	#include <w32api/winioctl.h>
47		48
48	#define REG_CONTROL_NET "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"	49	#define REG_CONTROL_NET "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
49		50
…		…
51	#define USERDEVICEDIR "\\??\\"	52	#define USERDEVICEDIR "\\??\\"
52	#define TAPSUFFIX ".tap"	53	#define TAPSUFFIX ".tap"
53		54
54	#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD \| 8000, request, method, FILE_ANY_ACCESS)	55	#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD \| 8000, request, method, FILE_ANY_ACCESS)
55		56
56	#define TAP_IOCTL_GET_LASTMAC TAP_CONTROL_CODE(0, METHOD_BUFFERED)	57	#define TAP_IOCTL_GET_LASTMAC TAP_CONTROL_CODE(0, METHOD_BUFFERED)
57	#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE(1, METHOD_BUFFERED)	58	#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE(1, METHOD_BUFFERED)
58	#define TAP_IOCTL_SET_STATISTICS TAP_CONTROL_CODE(2, METHOD_BUFFERED)	59	#define TAP_IOCTL_SET_STATISTICS TAP_CONTROL_CODE(2, METHOD_BUFFERED)
59		60	#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE(7, METHOD_BUFFERED)
60	static HANDLE device_handle = INVALID_HANDLE_VALUE;
61	static mac my_mac;
62		61
63	static const char *	62	static const char *
64	wstrerror (int err)	63	wstrerror (int err)
65	{	64	{
66	static char buf[1024];	65	static char buf[1024];
…		…
70	MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), buf, sizeof (buf), NULL))	69	MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), buf, sizeof (buf), NULL))
71	{	70	{
72	strncpy (buf, _("(unable to format errormessage)"), sizeof (buf));	71	strncpy (buf, _("(unable to format errormessage)"), sizeof (buf));
73	};	72	};
74		73
		74	char *nl;
75	if ((char *newline = strchr (buf, '\r')))	75	if ((nl = strchr (buf, '\r')))
76	*newline = '\0';	76	*nl = '\0';
77		77
78	return buf;	78	return buf;
		79	}
		80
		81	static HANDLE device_handle = INVALID_HANDLE_VALUE;
		82	static mac local_mac;
		83	static tap_packet *rcv_pkt;
		84	static int iopipe[2];
		85	static HANDLE pipe_handle, send_event, thread;
		86
		87	static DWORD WINAPI
		88	read_thread(void *)
		89	{
		90	static OVERLAPPED overlapped;
		91	static DWORD dlen;
		92	static u32 len;
		93	static u8 data[MAX_MTU];
		94
		95	overlapped.hEvent = CreateEvent (NULL, FALSE, FALSE, NULL);
		96
		97	for (;;)
		98	{
		99	if (!ReadFile (device_handle, data, MAX_MTU, &dlen, &overlapped))
		100	{
		101	if (GetLastError () == ERROR_IO_PENDING)
		102	GetOverlappedResult (device_handle, &overlapped, &dlen, TRUE);
		103	else
		104	{
		105	slog (L_ERR, "WIN32 TAP: ReadFile returned error: %s", wstrerror (GetLastError ()));
		106	exit (EXIT_FAILURE);
		107	}
		108	}
		109
		110	if (dlen > 0)
		111	{
		112	len = dlen;
		113	WriteFile (pipe_handle, &len, sizeof (len), &dlen, NULL);
		114	WriteFile (pipe_handle, data, len, &dlen, NULL);
		115	}
		116	}
79	}	117	}
80		118
81	const char *	119	const char *
82	tap_device::info ()	120	tap_device::info ()
83	{	121	{
…		…
89	HKEY key, key2;	127	HKEY key, key2;
90	int i;	128	int i;
91		129
92	char regpath[1024];	130	char regpath[1024];
93	char adapterid[1024];	131	char adapterid[1024];
94	char adaptername[1024];	132	BYTE adaptername[1024];
95	char tapname[1024];	133	char tapname[1024];
96	long len;	134	DWORD len;
97		135
98	bool found = false;	136	bool found = false;
99		137
100	int sock, err;	138	int sock, err;
101		139
102	/* Open registry and look for network adapters */	140	/* Open registry and look for network adapters */
103		141
104	if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_CONTROL_NET, 0, KEY_READ, &key))	142	if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_CONTROL_NET, 0, KEY_READ, &key))
105	{	143	{
106	slog (L_ERR, _("Unable to read registry: %s"),	144	slog (L_ERR, _("WIN32 TAP: unable to read registry: %s"),
107	wstrerror (GetLastError ()));	145	wstrerror (GetLastError ()));
108	return false;	146	exit (EXIT_FAILURE);
109	}	147	}
110		148
111	for (i = 0;; i++)	149	for (i = 0;; i++)
112	{	150	{
113	len = sizeof (adapterid);	151	len = sizeof (adapterid);
…		…
153		191
154	RegCloseKey (key);	192	RegCloseKey (key);
155		193
156	if (!found)	194	if (!found)
157	{	195	{
158	slog (L_ERR, _("No Windows tap device found!"));	196	slog (L_ERR, _("WIN32 TAP: no windows tap device found!"));
159	exit (1);	197	exit (EXIT_FAILURE);
160	}	198	}
161
162	strcpy (ifrname, adaptername);
163		199
164	/* Try to open the corresponding tap device */	200	/* Try to open the corresponding tap device */
165		201
166	if (device_handle == INVALID_HANDLE_VALUE)	202	if (device_handle == INVALID_HANDLE_VALUE)
167	{	203	{
168	snprintf (tapname, sizeof (tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);	204	snprintf (tapname, sizeof (tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
169	device_handle =	205	device_handle =
170	CreateFile (tapname, GENERIC_WRITE \| GENERIC_READ, 0, 0,	206	CreateFile (tapname, GENERIC_WRITE \| GENERIC_READ, 0, 0,
171	OPEN_EXISTING,	207	OPEN_EXISTING,
172	FILE_ATTRIBUTE_SYSTEM \| FILE_FLAG_OVERLAPPED, 0);	208	FILE_ATTRIBUTE_SYSTEM \| FILE_FLAG_OVERLAPPED, 0);
173	}	209	}
174		210
175	if (device_handle == INVALID_HANDLE_VALUE)	211	if (device_handle == INVALID_HANDLE_VALUE)
176	{	212	{
177	slog (L_ERR, _("%s is not a usable Windows tap device: %s"),	213	slog (L_ERR, _("WIN32 TAP: %s is not a usable windows tap device %s: %s"),
		214	adaptername, tapname, wstrerror (GetLastError ()));
		215	exit (EXIT_FAILURE);
		216	}
		217
		218	strcpy (ifrname, (char *)tapname);
		219
		220	/* Get MAC address from tap device */
		221
		222	if (!DeviceIoControl (device_handle, TAP_IOCTL_GET_MAC,
		223	&local_mac, sizeof (local_mac), &local_mac, sizeof (local_mac),
		224	&len, 0))
		225	{
		226	slog (L_ERR,
		227	_("WIN32 TAP: could not get MAC address from windows tap device %s: %s"),
178	adaptername, wstrerror (GetLastError ()));	228	adaptername, wstrerror (GetLastError ()));
179	exit (1);	229	exit (EXIT_FAILURE);
180	}
181
182	fd = cygwin_attach_handle_to_fd (tapname, -1, device_handle, 1, GENERIC_WRITE \| GENERIC_READ);
183
184	/* Get MAC address from tap device */
185
186	if (!DeviceIoControl
187	(device_handle, TAP_IOCTL_GET_MAC, &mac, sizeof (mac), &mac, sizeof (mac), &len, 0))
188	{	230	}
189	slog (L_ERR,	231
190	_("Could not get MAC address from Windows tap device %s: %s"),	232	pipe (iopipe);
191	adaptername, wstrerror (GetLastError ()));	233	fd = iopipe[0];
192	exit (1);	234	pipe_handle = (HANDLE) get_osfhandle (iopipe[1]);
193	}	235
		236	send_event = CreateEvent (NULL, FALSE, FALSE, NULL);
		237
		238	thread = CreateThread (NULL, 0, read_thread, NULL, 0, NULL);
		239
		240	/* try to set driver media status to 'connected' */
		241	ULONG status = TRUE;
		242	DeviceIoControl (device_handle, TAP_IOCTL_SET_MEDIA_STATUS,
		243	&status, sizeof (status),
		244	&status, sizeof (status), &len, NULL);
		245	// ignore error here on purpose
194	}	246	}
195		247
196	tap_device::~tap_device ()	248	tap_device::~tap_device ()
197	{	249	{
198	close (fd);	250	close (iopipe[0]);
		251	close (iopipe[1]);
		252	CloseHandle (device_handle);
		253	CloseHandle (send_event);
199	}	254	}
200		255
201	tap_packet *	256	tap_packet *
202	tap_device::recv ()	257	tap_device::recv ()
203	{	258	{
204	tap_packet *pkt = new tap_packet;	259	tap_packet *pkt = new tap_packet;
205		260
206	pkt->len = read (fd, &((*pkt)[0]), MAX_MTU);	261	if (sizeof (u32) != read (iopipe[0], &pkt->len, sizeof (u32)))
207
208	if (pkt->len <= 0)
209	{	262	{
210	slog (L_ERR, _("error while reading from %s %s: %s"),	263	slog (L_ERR, _("WIN32 TAP: i/o thread delivered incomplete pkt length"));
211	info (), conf.ifname, strerror (errno));	264	delete pkt;
212	free (pkt);
213	return 0;	265	return 0;
214	}	266	}
215		267
		268	if (pkt->len != read (iopipe[0], &((*pkt)[0]), pkt->len))
		269	{
		270	slog (L_ERR, _("WIN32 TAP: i/o thread delivered incomplete pkt"));
		271	delete pkt;
		272	return 0;
		273	}
		274
216	id2mac (THISNODE->id, &((*pkt)[6]));	275	id2mac (THISNODE->id, &((*pkt)[6]));
217		276
218	if (pkt->is_arp ())	277	if (pkt->is_arp ())
219	{	278	{
220	if ((*pkt)[22] == 0x08)	279	if (!memcmp (&(pkt)[22], &local_mac, sizeof (mac))) id2mac (THISNODE->id, &((pkt)[22]));
221	id2mac (THISNODE->id, &((*pkt)[22]));	280	if (!memcmp (&(pkt)[32], &local_mac, sizeof (mac))) id2mac (THISNODE->id, &((pkt)[32]));
222	if ((*pkt)[32] == 0x08)
223	id2mac (THISNODE->id, &((*pkt)[32]));
224	}	281	}
225		282
226	return pkt;	283	return pkt;
227	}	284	}
228		285
229	void	286	void
230	tap_device::send (tap_packet * pkt)	287	tap_device::send (tap_packet * pkt)
231	{	288	{
232	(*pkt)[6] = 0x08;	289	memcpy (&(*pkt)[6], &local_mac, sizeof (mac));
233	(*pkt)[7] = 0x00;
234	(*pkt)[8] = 0x58;
235	(*pkt)[9] = 0x00;
236	(*pkt)[10] = 0x00;
237	(*pkt)[11] = 0x01;
238		290
239	if (pkt->is_arp ())	291	if (pkt->is_arp ())
240	{	292	{
241	if ((pkt)[22] == 0xfe && (pkt)[27] == THISNODE->id)	293	if ((pkt)[22] == 0xfe && (pkt)[27] == THISNODE->id)
242	memcpy (&(pkt)[22], &(pkt)[6], sizeof (mac));	294	memcpy (&(*pkt)[22], &local_mac, sizeof (mac));
243		295
244	if ((pkt)[32] == 0xfe && (pkt)[37] == THISNODE->id)	296	if ((pkt)[32] == 0xfe && (pkt)[37] == THISNODE->id)
245	memcpy (&(pkt)[32], &(pkt)[6], sizeof (mac));	297	memcpy (&(*pkt)[32], &local_mac, sizeof (mac));
246	}	298	}
247		299
248	if (write (fd, &((*pkt)[0]), pkt->len) < 0)	300	DWORD dlen;
249	slog (L_ERR, _("can't write to %s %s: %s"), info (), conf.ifname,	301	OVERLAPPED overlapped;
250	strerror (errno));	302	overlapped.hEvent = send_event;
251	}
252		303
253	#if 0	304	if (!WriteFile (device_handle, &((*pkt)[0]), pkt->len, &dlen, &overlapped))
254
255	slog (L_DEBUG, _indent: Standard input:377: Error:Stmt nesting error.
256	("Tap reader running"));
257
258	/* Read from tap device and send to parent */
259
260	overlapped.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
261
262	for indent
263	: Standard input: 320: Error:Stmt nesting error.(;;
264	)
265	{
266	overlapped.Offset = 0;
267	overlapped.OffsetHigh = 0;
268	ResetEvent (overlapped.hEvent);
269
270	status = ReadFile (device_handle, buf, sizeof (buf), &len, &overlapped);
271
272	if (!status)
273	{	305	{
274	if (GetLastError () == ERROR_IO_PENDING)	306	if (GetLastError () == ERROR_IO_PENDING)
275	{
276	WaitForSingleObject (overlapped.hEvent, INFINITE);
277	if (!GetOverlappedResult (device_handle, &overlapped, &len, FALSE))	307	GetOverlappedResult (device_handle, &overlapped, &dlen, TRUE);
278	continue;
279	}
280	else	308	else
281	{	309	slog (L_ERR, _("WIN32 TAP: can't write to %s %s: %s"), info (), conf.ifname,
282	slog (L_ERR, _("Error while reading from %s %s: %s"),	310	wstrerror (GetLastError ()));
283	device_info, device, strerror (errno));
284	return -1;
285	}
286	}
287
288	if (send (sock, buf, len, 0) <= 0)
289	return -1;
290	}
291	}
292
293	void
294	close_device (void)
295	{
296	cp ();
297
298	CloseHandle (device_handle);
299	}
300
301	bool
302	read_packet (vpn_packet_t * packet)
303	{
304	int lenin;
305
306	cp ();
307
308	if ((lenin = recv (device_fd, packet->data, MTU, 0)) <= 0)
309	{	311	}
310	slog (L_ERR, _("Error while reading from %s %s: %s"), device_info,
311	device, strerror (errno));
312	return false;
313	}
314
315	packet->len = lenin;
316
317	device_total_in += packet->len;
318
319	ifdebug (TRAFFIC) slog (L_DEBUG, _("Read packet of %d bytes from %s"),
320	packet->len, device_info);
321
322	return true;
323	}	312	}
324
325	bool
326	write_packet (vpn_packet_t * packet)
327	{
328	long lenout;
329	OVERLAPPED overlapped = { 0 };
330
331	cp ();
332
333	ifdebug (TRAFFIC) slog (L_DEBUG, _("Writing packet of %d bytes to %s"),
334	packet->len, device_info);
335
336	if (!WriteFile
337	(device_handle, packet->data, packet->len, &lenout, &overlapped))
338	{
339	slog (L_ERR, _("Error while writing to %s %s: %s"), device_info,
340	device, wstrerror (GetLastError ()));
341	return false;
342	}
343
344	device_total_out += packet->len;
345
346	return true;
347	}
348
349	void
350	dump_device_stats (void)
351	{
352	cp ();
353
354	slog (L_DEBUG, _("Statistics for %s %s:"), device_info, device);
355	slog (L_DEBUG, _(" total bytes in: %10d"), device_total_in);
356	slog (L_DEBUG, _(" total bytes out: %10d"), device_total_out);
357	}
358	#endif

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Comparing gvpe/src/device-cygwin.C (file contents): Revision 1.5 by pcg, Wed Oct 15 01:38:24 2003 UTC vs. Revision 1.8 by pcg, Thu Jan 29 18:55:10 2004 UTC

Diff Legend

Comparing gvpe/src/device-cygwin.C (file contents):
Revision 1.5 by pcg, Wed Oct 15 01:38:24 2003 UTC vs.
Revision 1.8 by pcg, Thu Jan 29 18:55:10 2004 UTC