mirror of
https://github.com/SoftEtherVPN/SoftEtherVPN.git
synced 2025-11-29 06:41:33 +03:00
v4.03-9408-rtm
This commit is contained in:
dnobori
195
src/Cedar/UdpAccel.h
Normal file
195
src/Cedar/UdpAccel.h
Normal file
@ -0,0 +1,195 @@
|
||||
// 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.
|
||||
|
||||
|
||||
// UdpAccel.h
|
||||
// Header of UdpAccel.c
|
||||
|
||||
#ifndef UDPACCEL_H
|
||||
#define UDPACCEL_H
|
||||
|
||||
// Constants
|
||||
#define UDP_ACCELERATION_COMMON_KEY_SIZE 20 // Common key size
|
||||
#define UDP_ACCELERATION_PACKET_KEY_SIZE 20 // Key size for the packet
|
||||
#define UDP_ACCELERATION_PACKET_IV_SIZE 20 // IV size for the packet
|
||||
#define UDP_ACCELERATION_TMP_BUF_SIZE 2048 // Temporary buffer size
|
||||
#define UDP_ACCELERATION_WINDOW_SIZE_MSEC (30 * 1000) // Receive window size (in milliseconds)
|
||||
|
||||
#define UDP_ACCELERATION_SUPPORTED_MAX_PAYLOAD_SIZE 1600 // Maximum supported payload size
|
||||
#define UDP_ACCELERATION_MAX_PADDING_SIZE 32 // Maximum padding size
|
||||
|
||||
#define UDP_ACCELERATION_REQUIRE_CONTINUOUS (10 * 1000) // Not to use if stable communication is not continued at least for this time
|
||||
|
||||
// Time constant for Build 8534 or earlier
|
||||
#define UDP_ACCELERATION_KEEPALIVE_INTERVAL_MIN (1 * 1000) // Keep Alive Interval (minimum)
|
||||
#define UDP_ACCELERATION_KEEPALIVE_INTERVAL_MAX (3 * 1000) // Keep Alive Interval (maximum)
|
||||
#define UDP_ACCELERATION_KEEPALIVE_TIMEOUT (9 * 1000) // Time to disconnect time by non-communication
|
||||
|
||||
// Time constant for Build 8535 or later
|
||||
#define UDP_ACCELERATION_KEEPALIVE_INTERVAL_MIN_FAST (500) // Keep Alive Interval (minimum)
|
||||
#define UDP_ACCELERATION_KEEPALIVE_INTERVAL_MAX_FAST (1000) // Keep Alive Interval (maximum)
|
||||
#define UDP_ACCELERATION_KEEPALIVE_TIMEOUT_FAST (2100) // Time to disconnect time by non-communication
|
||||
|
||||
// Range of port numbers
|
||||
#define UDP_SERVER_PORT_LOWER 40000 // Minimum port
|
||||
#define UDP_SERVER_PORT_HIGHER 44999 // Maximum port
|
||||
|
||||
// NAT-T port signature to be embedded in the Keep Alive of the session
|
||||
#define UDP_NAT_T_PORT_SIGNATURE_IN_KEEP_ALIVE "NATT_MY_PORT"
|
||||
|
||||
// UDP Acceleration Mode
|
||||
struct UDP_ACCEL
|
||||
{
|
||||
CEDAR *Cedar; // Cedar
|
||||
bool NoNatT; // Not to communicate with the NAT-T server (To communicate with the query server instead)
|
||||
bool ClientMode; // Whether client mode
|
||||
bool IsInCedarPortList; // Whether included in the port list of the Cedar
|
||||
UINT64 Now; // Current time
|
||||
UCHAR MyKey[UDP_ACCELERATION_COMMON_KEY_SIZE]; // Submit-direction common key
|
||||
UCHAR YourKey[UDP_ACCELERATION_COMMON_KEY_SIZE]; // Receiving-direction common key
|
||||
SOCK *UdpSock; // UDP socket
|
||||
UINT MyPort; // My port number
|
||||
UINT YourPort; // Port number of the other party
|
||||
IP MyIp; // My IP address
|
||||
IP YourIp; // IP address of the other party
|
||||
IP YourIp2; // IP address of the other party (second)
|
||||
bool IsIPv6; // Whether it's an IPv6
|
||||
UCHAR TmpBuf[UDP_ACCELERATION_TMP_BUF_SIZE]; // Temporary buffer
|
||||
UINT64 LastRecvYourTick; // Opponent's tick value of the last reception
|
||||
UINT64 LastRecvMyTick; // My tick value of the last reception
|
||||
QUEUE *RecvBlockQueue; // Reception block queue
|
||||
bool UseHMac; // Flag to use the HMAC
|
||||
bool PlainTextMode; // No encryption
|
||||
UINT64 LastSetSrcIpAndPortTick; // Opponent's tick ??value at the time of storing the IP address and port number of the opponent at the end
|
||||
UINT64 LastRecvTick; // Tick when data has received at the end
|
||||
UINT64 NextSendKeepAlive; // Next time to send a KeepAlive packet
|
||||
UCHAR NextIv[UDP_ACCELERATION_PACKET_IV_SIZE]; // IV to be used next
|
||||
UINT MyCookie; // My cookie
|
||||
UINT YourCookie; // Cookie of the other party
|
||||
bool Inited; // Initialized flag
|
||||
UINT Mss; // Optimal MSS
|
||||
UINT MaxUdpPacketSize; // Get the maximum transmittable UDP size
|
||||
LOCK *NatT_Lock; // Lock the IP address field of NAT-T server
|
||||
IP NatT_IP; // IP address of the NAT-T server
|
||||
THREAD *NatT_GetIpThread; // IP address acquisition thread of NAT-T server
|
||||
bool NatT_Halt; // Halting flag of IP address acquisition thread of NAT-T server
|
||||
EVENT *NatT_HaltEvent; // Halting event of IP address acquisition thread of NAT-T server
|
||||
UINT64 NextPerformNatTTick; // Time to communicate with NAT-T server next time
|
||||
UINT CommToNatT_NumFail; // Number of failures to communicate with NAT-T server
|
||||
UINT MyPortByNatTServer; // Self port number which is received from the NAT-T server
|
||||
bool MyPortByNatTServerChanged; // The self port number which is received from the NAT-T server changes
|
||||
UINT YourPortByNatTServer; // Port number of the opponent that was found via the NAT-T server
|
||||
bool YourPortByNatTServerChanged; // Port number of the opponent that was found via the NAT-T server has been changed
|
||||
bool FatalError; // A fatal error occurred
|
||||
bool NatT_IP_Changed; // IP address of the NAT-T server has changed
|
||||
UINT64 NatT_TranId; // Transaction ID to be exchanged with the NAT-T server
|
||||
bool IsReachedOnce; // It is true if it succeeds in mutual transmission and reception of packets at least once
|
||||
UINT64 CreatedTick; // Object creation time
|
||||
bool FastDetect; // Fast disconnection detection mode
|
||||
UINT64 FirstStableReceiveTick; // Start time of current stable continued receivable period
|
||||
bool UseUdpIpQuery; // Use the self IP address query by UDP
|
||||
IP UdpIpQueryHost; // Host for the self IP address query by UDP
|
||||
UINT UdpIpQueryPort; // Port number for self IP address for query by UDP
|
||||
UCHAR UdpIpQueryPacketData[16]; // Query packet data (final transmission)
|
||||
UINT UdpIpQueryPacketSize; // Query packet data size (final transmission)
|
||||
UCHAR UdpHostUniqueKey[SHA1_SIZE]; // Unique key for UDP self endpoint query
|
||||
};
|
||||
|
||||
// Function prototype
|
||||
UDP_ACCEL *NewUdpAccel(CEDAR *cedar, IP *ip, bool client_mode, bool random_port, bool no_nat_t);
|
||||
void FreeUdpAccel(UDP_ACCEL *a);
|
||||
bool UdpAccelInitClient(UDP_ACCEL *a, UCHAR *server_key, IP *server_ip, UINT server_port, UINT server_cookie, UINT client_cookie, IP *server_ip_2);
|
||||
bool UdpAccelInitServer(UDP_ACCEL *a, UCHAR *client_key, IP *client_ip, UINT client_port, IP *client_ip_2);
|
||||
void UdpAccelPoll(UDP_ACCEL *a);
|
||||
void UdpAccelSetTick(UDP_ACCEL *a, UINT64 tick64);
|
||||
BLOCK *UdpAccelProcessRecvPacket(UDP_ACCEL *a, UCHAR *buf, UINT size, IP *src_ip, UINT src_port);
|
||||
void UdpAccelCalcKey(UCHAR *key, UCHAR *common_key, UCHAR *iv);
|
||||
bool UdpAccelIsSendReady(UDP_ACCEL *a, bool check_keepalive);
|
||||
void UdpAccelSend(UDP_ACCEL *a, UCHAR *data, UINT data_size, bool compressed, UINT max_size, bool high_priority);
|
||||
void UdpAccelSendBlock(UDP_ACCEL *a, BLOCK *b);
|
||||
UINT UdpAccelCalcMss(UDP_ACCEL *a);
|
||||
void NatT_GetIpThread(THREAD *thread, void *param);
|
||||
|
||||
#endif // UDPACCEL_H
|
||||
|
||||
|
||||
|
||||
// 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/
|
||||
Reference in New Issue
Block a user