v4.03-9408-rtm

src/Cedar/NullLan.c

@@ -0,0 +1,256 @@
+// SoftEther VPN Source Code
+// Cedar Communication Module
+// 
+// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
+// 
+// Copyright (c) 2012-2014 Daiyuu Nobori.
+// Copyright (c) 2012-2014 SoftEther VPN Project, University of Tsukuba, Japan.
+// Copyright (c) 2012-2014 SoftEther Corporation.
+// 
+// All Rights Reserved.
+// 
+// http://www.softether.org/
+// 
+// Author: Daiyuu Nobori
+// Comments: Tetsuo Sugiyama, Ph.D.
+// 
+// 
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// version 2 as published by the Free Software Foundation.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// 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 version 2
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+// 
+// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
+// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
+// 
+// 
+// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
+// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
+// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
+// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
+// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
+// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
+// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
+// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
+// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
+// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
+// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
+// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
+// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
+// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
+// 
+// USE ONLY IN JAPAN. DO NOT USE IT IN OTHER COUNTRIES. IMPORTING THIS
+// SOFTWARE INTO OTHER COUNTRIES IS AT YOUR OWN RISK. SOME COUNTRIES
+// PROHIBIT ENCRYPTED COMMUNICATIONS. USING THIS SOFTWARE IN OTHER
+// COUNTRIES MIGHT BE RESTRICTED.
+// 
+// 
+// DEAR SECURITY EXPERTS
+// ---------------------
+// 
+// If you find a bug or a security vulnerability please kindly inform us
+// about the problem immediately so that we can fix the security problem
+// to protect a lot of users around the world as soon as possible.
+// 
+// Our e-mail address for security reports is:
+// softether-vpn-security [at] softether.org
+// 
+// Please note that the above e-mail address is not a technical support
+// inquiry address. If you need technical assistance, please visit
+// http://www.softether.org/ and ask your question on the users forum.
+// 
+// Thank you for your cooperation.
+
+
+// NullLan.c
+// Virtual LAN card device driver for testing
+
+#include "CedarPch.h"
+
+static UCHAR null_lan_broadcast_address[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+
+// Get the packet adapter
+PACKET_ADAPTER *NullGetPacketAdapter()
+{
+	PACKET_ADAPTER *pa = NewPacketAdapter(NullPaInit, NullPaGetCancel, NullPaGetNextPacket,
+		NullPaPutPacket, NullPaFree);
+
+	return pa;
+}
+
+// Packet generation thread
+void NullPacketGenerateThread(THREAD *t, void *param)
+{
+	NULL_LAN *n = (NULL_LAN *)param;
+	// Validate arguments
+	if (t == NULL || param == NULL)
+	{
+		return;
+	}
+
+	while (true)
+	{
+		Wait(n->Event, Rand32() % NULL_PACKET_GENERATE_INTERVAL);
+		if (n->Halt)
+		{
+			break;
+		}
+
+		LockQueue(n->PacketQueue);
+		{
+			UCHAR *data;
+			BLOCK *b;
+			UINT size = Rand32() % 1500 + 14;
+			data = Malloc(size);
+			Copy(data, null_lan_broadcast_address, 6);
+			Copy(data + 6, n->MacAddr, 6);
+			b = NewBlock(data, size, 0);
+			InsertQueue(n->PacketQueue, b);
+		}
+		UnlockQueue(n->PacketQueue);
+		Cancel(n->Cancel);
+	}
+}
+
+// Initialize the packet adapter
+bool NullPaInit(SESSION *s)
+{
+	NULL_LAN *n;
+	// Validate arguments
+	if (s == NULL)
+	{
+		return false;
+	}
+
+	n = ZeroMalloc(sizeof(NULL_LAN));
+	s->PacketAdapter->Param = (void *)n;
+
+	n->Cancel = NewCancel();
+	n->PacketQueue = NewQueue();
+	n->Event = NewEvent();
+
+	GenMacAddress(n->MacAddr);
+
+	n->PacketGeneratorThread = NewThread(NullPacketGenerateThread, n);
+
+	return true;
+}
+
+// Get the cancel object
+CANCEL *NullPaGetCancel(SESSION *s)
+{
+	// Validate arguments
+	NULL_LAN *n;
+	if (s == NULL || (n = s->PacketAdapter->Param) == NULL)
+	{
+		return NULL;
+	}
+
+	AddRef(n->Cancel->ref);
+
+	return n->Cancel;
+}
+
+// Get the next packet
+UINT NullPaGetNextPacket(SESSION *s, void **data)
+{
+	UINT size = 0;
+	// Validate arguments
+	NULL_LAN *n;
+	if (s == NULL || (n = s->PacketAdapter->Param) == NULL)
+	{
+		return INFINITE;
+	}
+
+	LockQueue(n->PacketQueue);
+	{
+		BLOCK *b = GetNext(n->PacketQueue);
+
+		if (b != NULL)
+		{
+			*data = b->Buf;
+			size = b->Size;
+			Free(b);
+		}
+	}
+	UnlockQueue(n->PacketQueue);
+
+	return size;
+}
+
+// Write the packet
+bool NullPaPutPacket(SESSION *s, void *data, UINT size)
+{
+	// Validate arguments
+	if (s == NULL)
+	{
+		return false;
+	}
+	if (data == NULL)
+	{
+		return true;
+	}
+
+	// Packet ignored
+	Free(data);
+
+	return true;
+}
+
+// Release
+void NullPaFree(SESSION *s)
+{
+	// Validate arguments
+	NULL_LAN *n;
+	BLOCK *b;
+	if (s == NULL || (n = s->PacketAdapter->Param) == NULL)
+	{
+		return;
+	}
+
+	n->Halt = true;
+	Set(n->Event);
+
+	WaitThread(n->PacketGeneratorThread, INFINITE);
+	ReleaseThread(n->PacketGeneratorThread);
+
+	LockQueue(n->PacketQueue);
+	{
+		while (b = GetNext(n->PacketQueue))
+		{
+			FreeBlock(b);
+		}
+	}
+	UnlockQueue(n->PacketQueue);
+
+	ReleaseQueue(n->PacketQueue);
+
+	ReleaseCancel(n->Cancel);
+
+	ReleaseEvent(n->Event);
+
+	s->PacketAdapter->Param = NULL;
+	Free(n);
+}
+
+
+
+// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
+// Department of Computer Science has dozens of overly-enthusiastic geeks.
+// Join us: http://www.tsukuba.ac.jp/english/admission/