SoftEtherVPN/src/Cedar/Bridge.h

// SoftEther VPN Source Code - Developer Edition Master Branch
// Cedar Communication Module
// 
// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
// 
// Copyright (c) Daiyuu Nobori.
// Copyright (c) SoftEther VPN Project, University of Tsukuba, Japan.
// Copyright (c) SoftEther Corporation.
// 
// All Rights Reserved.
// 
// http://www.softether.org/
// 
// Author: Daiyuu Nobori, Ph.D.
// 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
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// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
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// CRIMINAL LAWS OR CIVIL RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS
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// SOFTETHER VPN PROJECT HAS DEVELOPED AND DISTRIBUTED THIS SOFTWARE TO
// COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING CIVIL RIGHTS INCLUDING
// PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER COUNTRIES' LAWS OR
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// RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT
// JUST A STATEMENT FOR WARNING AND DISCLAIMER.
// 
// 
// SOURCE CODE CONTRIBUTION
// ------------------------
// 
// Your contribution to SoftEther VPN Project is much appreciated.
// Please send patches to us through GitHub.
// Read the SoftEther VPN Patch Acceptance Policy in advance:
// http://www.softether.org/5-download/src/9.patch
// 
// 
// 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.
// 
// 
// NO MEMORY OR RESOURCE LEAKS
// ---------------------------
// 
// The memory-leaks and resource-leaks verification under the stress
// test has been passed before release this source code.


// Bridge.h
// Header of Bridge.c

#ifndef	BRIDGE_H
#define	BRIDGE_H

#ifdef	OS_WIN32

// For Win32
#include <Cedar/BridgeWin32.h>

#else

// For Unix
#include <Cedar/BridgeUnix.h>

#endif	// OS_WIN32

// Constants
#define	BRIDGE_SPECIAL_IPRAW_NAME		"ipv4_rawsocket_virtual_router"

// Bridge
struct BRIDGE
{
	bool Active;			// Status
	CEDAR *Cedar;			// Cedar
	HUB *Hub;				// HUB
	SESSION *Session;		// Session
	POLICY *Policy;			// Policy
	ETH *Eth;				// Ethernet
	char Name[MAX_SIZE];	// Device name
	UINT64 LastBridgeTry;	// Time to try to bridge at last
	bool Local;				// Local mode
	bool Monitor;			// Monitor mode
	bool TapMode;			// Tap mode
	bool LimitBroadcast;	// Broadcasts limiting mode
	UCHAR TapMacAddress[6];	// MAC address of the tap
	UINT LastNumDevice;		// Number of device (Number of last checked)
	UINT64 LastNumDeviceCheck;	// Time at which to check the number of devices at last
	UINT64 LastChangeMtuError;	// Time that recorded the error to change the MTU at last
	LOCALBRIDGE *ParentLocalBridge;	// Parent Local Bridge
};

// Local bridge
struct LOCALBRIDGE
{
	char HubName[MAX_HUBNAME_LEN + 1];			// Virtual HUB name
	char DeviceName[MAX_SIZE];					// Device name
	bool Local;									// Local mode
	bool Monitor;								// Monitor mode
	bool TapMode;								// Tap mode
	bool LimitBroadcast;						// Broadcast packets limiting mode
	UCHAR TapMacAddress[6];						// MAC address of the tap
	BRIDGE *Bridge;								// Bridge
};

BRIDGE *BrNewBridge(HUB *h, char *name, POLICY *p, bool local, bool monitor, bool tapmode, char *tapaddr, bool limit_broadcast, LOCALBRIDGE *parent_local_bridge);
void BrBridgeThread(THREAD *thread, void *param);
void BrFreeBridge(BRIDGE *b);
void InitLocalBridgeList(CEDAR *c);
void FreeLocalBridgeList(CEDAR *c);
void AddLocalBridge(CEDAR *c, char *hubname, char *devicename, bool local, bool monitor, bool tapmode, char *tapaddr, bool limit_broadcast);
bool DeleteLocalBridge(CEDAR *c, char *hubname, char *devicename);
bool IsBridgeSupported();
bool IsNeedWinPcap();
UINT GetEthDeviceHash();
bool IsRawIpBridgeSupported();

#endif	// BRIDGE_H