mirror of
https://github.com/SoftEtherVPN/SoftEtherVPN.git
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256 lines
9.5 KiB
C
256 lines
9.5 KiB
C
// SoftEther VPN Source Code - Developer Edition Master Branch
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// Cedar Communication Module
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//
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// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
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//
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// Copyright (c) Daiyuu Nobori.
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// Copyright (c) SoftEther VPN Project, University of Tsukuba, Japan.
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// Copyright (c) SoftEther Corporation.
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//
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// All Rights Reserved.
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//
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// http://www.softether.org/
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//
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// Author: Daiyuu Nobori, Ph.D.
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// Comments: Tetsuo Sugiyama, Ph.D.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// version 2 as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License version 2
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
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// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
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//
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//
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// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
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// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
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// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
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// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
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// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
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// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
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// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
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// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
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// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
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// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
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// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
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// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
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// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
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// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
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//
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// USE ONLY IN JAPAN. DO NOT USE THIS SOFTWARE IN ANOTHER COUNTRY UNLESS
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// YOU HAVE A CONFIRMATION THAT THIS SOFTWARE DOES NOT VIOLATE ANY
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// CRIMINAL LAWS OR CIVIL RIGHTS IN THAT PARTICULAR COUNTRY. USING THIS
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// SOFTWARE IN OTHER COUNTRIES IS COMPLETELY AT YOUR OWN RISK. THE
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// SOFTETHER VPN PROJECT HAS DEVELOPED AND DISTRIBUTED THIS SOFTWARE TO
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// COMPLY ONLY WITH THE JAPANESE LAWS AND EXISTING CIVIL RIGHTS INCLUDING
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// PATENTS WHICH ARE SUBJECTS APPLY IN JAPAN. OTHER COUNTRIES' LAWS OR
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// CIVIL RIGHTS ARE NONE OF OUR CONCERNS NOR RESPONSIBILITIES. WE HAVE
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// NEVER INVESTIGATED ANY CRIMINAL REGULATIONS, CIVIL LAWS OR
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// INTELLECTUAL PROPERTY RIGHTS INCLUDING PATENTS IN ANY OF OTHER 200+
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// COUNTRIES AND TERRITORIES. BY NATURE, THERE ARE 200+ REGIONS IN THE
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// WORLD, WITH DIFFERENT LAWS. IT IS IMPOSSIBLE TO VERIFY EVERY
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// COUNTRIES' LAWS, REGULATIONS AND CIVIL RIGHTS TO MAKE THE SOFTWARE
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// COMPLY WITH ALL COUNTRIES' LAWS BY THE PROJECT. EVEN IF YOU WILL BE
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// SUED BY A PRIVATE ENTITY OR BE DAMAGED BY A PUBLIC SERVANT IN YOUR
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// COUNTRY, THE DEVELOPERS OF THIS SOFTWARE WILL NEVER BE LIABLE TO
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// RECOVER OR COMPENSATE SUCH DAMAGES, CRIMINAL OR CIVIL
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// RESPONSIBILITIES. NOTE THAT THIS LINE IS NOT LICENSE RESTRICTION BUT
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// JUST A STATEMENT FOR WARNING AND DISCLAIMER.
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//
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//
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// SOURCE CODE CONTRIBUTION
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// ------------------------
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//
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// Your contribution to SoftEther VPN Project is much appreciated.
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// Please send patches to us through GitHub.
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// Read the SoftEther VPN Patch Acceptance Policy in advance:
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// http://www.softether.org/5-download/src/9.patch
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//
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//
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// DEAR SECURITY EXPERTS
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// ---------------------
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//
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// If you find a bug or a security vulnerability please kindly inform us
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// about the problem immediately so that we can fix the security problem
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// to protect a lot of users around the world as soon as possible.
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//
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// Our e-mail address for security reports is:
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// softether-vpn-security [at] softether.org
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//
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// Please note that the above e-mail address is not a technical support
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// inquiry address. If you need technical assistance, please visit
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// http://www.softether.org/ and ask your question on the users forum.
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//
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// Thank you for your cooperation.
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//
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//
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// NO MEMORY OR RESOURCE LEAKS
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// ---------------------------
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//
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// The memory-leaks and resource-leaks verification under the stress
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// test has been passed before release this source code.
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// Layer3.h
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// Header of Layer3.c
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#ifndef LAYER3_H
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#define LAYER3_H
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// Constants
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#define L3_USERNAME "L3SW_"
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// L3 ARP table entry
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struct L3ARPENTRY
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{
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UINT IpAddress; // IP address
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UCHAR MacAddress[6]; // MAC address
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UCHAR Padding[2];
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UINT64 Expire; // Expiration date
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};
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// L3 ARP resolution waiting list entry
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struct L3ARPWAIT
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{
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UINT IpAddress; // IP address
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UINT64 LastSentTime; // Time which the data has been sent last
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UINT64 Expire; // Expiration date
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};
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// L3 IP packet table
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struct L3PACKET
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{
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PKT *Packet; // Packet data body
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UINT64 Expire; // Expiration date
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UINT NextHopIp; // Local delivery destination IP address
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};
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// L3 routing table definition
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struct L3TABLE
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{
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UINT NetworkAddress; // Network address
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UINT SubnetMask; // Subnet mask
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UINT GatewayAddress; // Gateway address
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UINT Metric; // Metric
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};
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// L3 interface definition
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struct L3IF
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{
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L3SW *Switch; // Layer-3 switch
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char HubName[MAX_HUBNAME_LEN + 1]; // Virtual HUB name
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UINT IpAddress; // IP address
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UINT SubnetMask; // Subnet mask
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HUB *Hub; // Virtual HUB
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SESSION *Session; // Session
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LIST *ArpTable; // ARP table
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LIST *ArpWaitTable; // ARP waiting table
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QUEUE *IpPacketQueue; // IP packet queue (for reception from other interfaces)
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LIST *IpWaitList; // IP waiting list
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QUEUE *SendQueue; // Transmission queue
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UCHAR MacAddress[6]; // MAC address
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UCHAR Padding[2];
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UINT64 LastDeleteOldArpTable; // Time that old ARP table entries are cleared
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LIST *CancelList; // Cancellation list
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UINT64 LastBeaconSent; // Time which the beacon has been sent last
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};
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// L3 switch definition
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struct L3SW
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{
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char Name[MAX_HUBNAME_LEN + 1]; // Name
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LOCK *lock; // Lock
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REF *ref; // Reference counter
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CEDAR *Cedar; // Cedar
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bool Active; // During operation flag
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bool Online; // Online flag
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volatile bool Halt; // Halting flag
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LIST *IfList; // Interface list
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LIST *TableList; // Routing table list
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THREAD *Thread; // Thread
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};
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// Function prototype
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int CmpL3Sw(void *p1, void *p2);
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int CmpL3ArpEntry(void *p1, void *p2);
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int CmpL3ArpWaitTable(void *p1, void *p2);
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int CmpL3Table(void *p1, void *p2);
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int CmpL3If(void *p1, void *p2);
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void InitCedarLayer3(CEDAR *c);
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void FreeCedarLayer3(CEDAR *c);
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L3SW *NewL3Sw(CEDAR *c, char *name);
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void ReleaseL3Sw(L3SW *s);
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void CleanupL3Sw(L3SW *s);
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bool L3AddIf(L3SW *s, char *hubname, UINT ip, UINT subnet);
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bool L3DelIf(L3SW *s, char *hubname);
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bool L3AddTable(L3SW *s, L3TABLE *tbl);
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bool L3DelTable(L3SW *s, L3TABLE *tbl);
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L3IF *L3SearchIf(L3SW *s, char *hubname);
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L3SW *L3GetSw(CEDAR *c, char *name);
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L3SW *L3AddSw(CEDAR *c, char *name);
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bool L3DelSw(CEDAR *c, char *name);
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void L3FreeAllSw(CEDAR *c);
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void L3SwStart(L3SW *s);
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void L3SwStop(L3SW *s);
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void L3SwThread(THREAD *t, void *param);
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void L3Test(SERVER *s);
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void L3InitAllInterfaces(L3SW *s);
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void L3FreeAllInterfaces(L3SW *s);
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void L3IfThread(THREAD *t, void *param);
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void L3InitInterface(L3IF *f);
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void L3FreeInterface(L3IF *f);
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L3IF *L3GetNextIf(L3SW *s, UINT ip, UINT *next_hop);
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L3TABLE *L3GetBestRoute(L3SW *s, UINT ip);
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UINT L3GetNextPacket(L3IF *f, void **data);
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void L3Polling(L3IF *f);
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void L3PollingBeacon(L3IF *f);
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void L3DeleteOldArpTable(L3IF *f);
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void L3DeleteOldIpWaitList(L3IF *f);
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void L3PollingArpWaitTable(L3IF *f);
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void L3SendL2Now(L3IF *f, UCHAR *dest_mac, UCHAR *src_mac, USHORT protocol, void *data, UINT size);
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void L3SendArpRequestNow(L3IF *f, UINT dest_ip);
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void L3SendArpResponseNow(L3IF *f, UCHAR *dest_mac, UINT dest_ip, UINT src_ip);
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void L3GenerateMacAddress(L3IF *f);
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L3ARPENTRY *L3SearchArpTable(L3IF *f, UINT ip);
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void L3SendIpNow(L3IF *f, L3ARPENTRY *a, L3PACKET *p);
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void L3SendIp(L3IF *f, L3PACKET *p);
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void L3RecvArp(L3IF *f, PKT *p);
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void L3RecvArpRequest(L3IF *f, PKT *p);
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void L3RecvArpResponse(L3IF *f, PKT *p);
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void L3KnownArp(L3IF *f, UINT ip, UCHAR *mac);
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void L3SendArp(L3IF *f, UINT ip);
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void L3InsertArpTable(L3IF *f, UINT ip, UCHAR *mac);
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void L3SendWaitingIp(L3IF *f, UCHAR *mac, UINT ip, L3ARPENTRY *a);
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void L3PutPacket(L3IF *f, void *data, UINT size);
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void L3RecvL2(L3IF *f, PKT *p);
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void L3StoreIpPacketToIf(L3IF *src_if, L3IF *dst_if, L3PACKET *p);
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void L3RecvIp(L3IF *f, PKT *p, bool self);
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void L3PollingIpQueue(L3IF *f);
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#endif // LAYER3_H
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