mirror of
https://github.com/SoftEtherVPN/SoftEtherVPN.git
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238 lines
6.7 KiB
C
238 lines
6.7 KiB
C
// SoftEther VPN Source Code
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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) 2012-2014 Daiyuu Nobori.
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// Copyright (c) 2012-2014 SoftEther VPN Project, University of Tsukuba, Japan.
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// Copyright (c) 2012-2014 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
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// Comments: Tetsuo Sugiyama, Ph.D.
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//
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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 IT IN OTHER COUNTRIES. IMPORTING THIS
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// SOFTWARE INTO OTHER COUNTRIES IS AT YOUR OWN RISK. SOME COUNTRIES
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// PROHIBIT ENCRYPTED COMMUNICATIONS. USING THIS SOFTWARE IN OTHER
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// COUNTRIES MIGHT BE RESTRICTED.
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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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// SecureNAT.c
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// SecureNAT code
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#include "CedarPch.h"
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// SecureNAT server-side thread
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void SnSecureNATThread(THREAD *t, void *param)
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{
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SNAT *s;
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CONNECTION *c;
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SESSION *se;
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POLICY *policy;
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HUB *h;
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// Validate arguments
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if (t == NULL || param == NULL)
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{
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return;
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}
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s = (SNAT *)param;
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// Create a server connection
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c = NewServerConnection(s->Cedar, NULL, t);
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c->Protocol = CONNECTION_HUB_SECURE_NAT;
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// Apply the default policy
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policy = ClonePolicy(GetDefaultPolicy());
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// Not to limit the number of broadcast
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policy->NoBroadcastLimiter = true;
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h = s->Hub;
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AddRef(h->ref);
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// create a server session
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se = NewServerSession(s->Cedar, c, s->Hub, SNAT_USER_NAME, policy);
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se->SecureNATMode = true;
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se->SecureNAT = s;
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c->Session = se;
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ReleaseConnection(c);
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HLog(se->Hub, "LH_NAT_START", se->Name);
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// User name
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se->Username = CopyStr(SNAT_USER_NAME_PRINT);
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s->Session = se;
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AddRef(se->ref);
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// Notification initialization completion
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NoticeThreadInit(t);
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ReleaseCancel(s->Nat->Virtual->Cancel);
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s->Nat->Virtual->Cancel = se->Cancel1;
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AddRef(se->Cancel1->ref);
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if (s->Nat->Virtual->NativeNat != NULL)
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{
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CANCEL *old_cancel = NULL;
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Lock(s->Nat->Virtual->NativeNat->CancelLock);
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{
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if (s->Nat->Virtual->NativeNat->Cancel != NULL)
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{
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old_cancel = s->Nat->Virtual->NativeNat->Cancel;
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s->Nat->Virtual->NativeNat->Cancel = se->Cancel1;
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AddRef(se->Cancel1->ref);
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}
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}
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Unlock(s->Nat->Virtual->NativeNat->CancelLock);
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if (old_cancel != NULL)
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{
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ReleaseCancel(old_cancel);
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}
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}
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// Main function of the session
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Debug("SecureNAT Start.\n");
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SessionMain(se);
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Debug("SecureNAT Stop.\n");
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HLog(se->Hub, "LH_NAT_STOP");
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ReleaseHub(h);
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ReleaseSession(se);
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}
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// Release the SecureNAT
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void SnFreeSecureNAT(SNAT *s)
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{
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// Validate arguments
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if (s == NULL)
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{
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return;
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}
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// Stop the session
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StopSession(s->Session);
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ReleaseSession(s->Session);
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// Virtual machine release
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Virtual_Free(s->Nat->Virtual);
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// NAT release
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NiFreeNat(s->Nat);
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DeleteLock(s->lock);
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Free(s);
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}
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// Create a new SecureNAT
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SNAT *SnNewSecureNAT(HUB *h, VH_OPTION *o)
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{
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SNAT *s;
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THREAD *t;
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// Validate arguments
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if (h == NULL || o == NULL)
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{
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return NULL;
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}
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s = ZeroMalloc(sizeof(SNAT));
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s->Cedar = h->Cedar;
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s->Hub = h;
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s->lock = NewLock();
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// Create a NAT
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s->Nat = NiNewNatEx(s, o);
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// Initialize the virtual machine
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VirtualInit(s->Nat->Virtual);
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// Create a thread
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t = NewThread(SnSecureNATThread, s);
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WaitThreadInit(t);
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ReleaseThread(t);
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return s;
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}
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// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
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// Department of Computer Science has dozens of overly-enthusiastic geeks.
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// Join us: http://www.tsukuba.ac.jp/english/admission/
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