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// Copyright (C) 2003-2005 Stephane Thiell |
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// |
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// This file is part of pxyscand (from pxys) |
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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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// as published by the Free Software Foundation; either version 2 |
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// of the License, or (at your option) any later version. |
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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 |
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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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#define RCSID "$Id: PXScan.cc,v 1.8 2006/09/06 10:09:22 spale Exp $" |
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|
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#define SCAN_TIMING 1.0 |
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|
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#include "PXScan.h" |
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#include "PXScanManager.h" |
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#include "PXSession.h" |
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|
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/* Module headers */ |
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#include "PXMWingate.h" |
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#include "PXMSocks.h" |
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#include "PXMHttpProxy.h" |
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#include "PXMHttpGet.h" |
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#include "PXMCrazyBandit.h" |
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|
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#include <algorithm> |
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#include <cassert> |
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#include <peak/peak.h> |
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|
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bool PXScan::sInitialized = false; |
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|
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PXScan::PXScan(const opas_msg_query &inQuery, PXSession *inSession, |
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PXScanManager *inScanManager) |
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: mScanManager( inScanManager ), mStatus(0), mScanFlags(0), mScanTimer(NULL) |
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{ |
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size_t nmods = mScanManager->mConfig->scanner.modules.size(); |
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|
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// Optimize memory allocation. |
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mModules.reserve(nmods); |
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|
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// Instantiate and register our scan modules |
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for (size_t i = 0; i < nmods; i++) |
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{ |
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PXConfigModule *mod = &mScanManager->mConfig->scanner.modules[i]; |
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switch (mod->id) |
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{ |
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case CONFIG_MODULE_HTTP: |
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this->RegisterModule(new PXMHttpProxy(this, mod->port)); |
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this->RegisterModule(new PXMHttpGet(this, mod->port)); |
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break; |
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case CONFIG_MODULE_WINGATE: |
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this->RegisterModule(new PXMWingate(this)); |
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break; |
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case CONFIG_MODULE_SOCKS: |
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this->RegisterModule(new PXMSocks(this, mod->port)); |
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break; |
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case CONFIG_MODULE_CRAZYBANDIT: |
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this->RegisterModule(new PXMCrazyBandit(this)); |
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break; |
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default: |
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abort(); |
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} |
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} |
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|
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if (sInitialized) |
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{ |
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// Shuffle scans order; an idea of Jeb. |
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std::random_shuffle(mModules.begin(), mModules.end()); |
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} |
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else |
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{ |
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sInitialized = true; |
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this->InitModules(); |
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} |
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|
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// And now store our first query for this scan. |
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this->AppendQuery(inQuery, inSession); |
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} |
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|
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PXScan::~PXScan() |
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{ |
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assert(mScanTimer == NULL); |
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|
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mScanManager->ScanCompleted(this); |
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|
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// Free resources allocated by the scan modules. |
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for (int i = mModules.size(); i--; ) |
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delete mModules[i]; |
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} |
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|
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void |
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PXScan::RegisterModule(PXScanModule *inScanModule) |
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{ |
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/* We store instantiated modules in a vector. */ |
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mModules.push_back(inScanModule); |
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} |
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|
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void |
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PXScan::InitModules() |
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{ |
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for (size_t i = 0; i < mModules.size(); i++) |
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mModules[i]->InitModule(); |
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} |
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|
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void |
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PXScan::SneakModule(const char *inShortName, uint16_t inPort, |
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uint32_t *inConnCountPtr, uint32_t *inProxyCountPtr) const |
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{ |
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mScanManager->UseModule(new PXModuleInfo(inShortName, |
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inPort, |
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inConnCountPtr, |
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inProxyCountPtr)); |
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} |
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|
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void |
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PXScan::AppendQuery(const opas_msg_query &inQuery, PXSession *inSession) |
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{ |
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PXScanQuery query = { inQuery, inSession }; |
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mScanQueryList.push_back(query); |
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} |
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|
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bool |
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PXScan::IsSessionReferenced(const PXSession *inSession) |
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{ |
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list<PXScanQuery>::const_iterator i = mScanQueryList.begin(); |
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for (; i != mScanQueryList.end(); i++) |
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if ((*i).session == inSession) |
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return true; |
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return false; |
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} |
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|
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void |
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PXScan::Schedule() |
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{ |
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if (!mScanManager->AddScan(this)) |
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{ |
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this->Error(1000); |
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this->Done(); |
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} |
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} |
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|
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void |
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PXScan::Start() |
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{ |
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// Sanity check, no module is no fun. |
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assert(mModules.size() > 0); |
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|
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// Initialize stuffs. Iterator points to first module. |
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mModuleIterator = mModules.begin(); |
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mCompletedCount = 0; |
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mCompletedMax = mModules.size(); |
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mLaunched = 0; |
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mStatus = PXSCAN_SCANNING; |
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|
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// Prepare for next scan, with a little delay |
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// |
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mScanTimer = peak_timer_create(SCAN_TIMING, SCAN_TIMING, // repeat! |
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TimerCallback, this); |
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if (!mScanTimer) |
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abort(); |
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|
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peak_task_timer_add(peak_task_self(), mScanTimer); |
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peak_release(mScanTimer); |
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|
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// Launch first scan type. |
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this->Launch(); |
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} |
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|
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void |
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PXScan::Launch() |
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{ |
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if (mModuleIterator == mModules.end()) |
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{ |
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// All scan types are now launched. |
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mMutex.Lock(); |
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this->TimerStop(); |
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mMutex.Unlock(); |
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return; |
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} |
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|
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mMutex.Lock(); |
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if (mStatus == PXSCAN_SCANNING) |
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{ |
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// Normal way. |
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mLaunched++; |
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mMutex.Unlock(); |
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|
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if (!(*mModuleIterator)->StartScan()) |
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{ |
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this->Error(1000); |
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this->Completed(*mModuleIterator); |
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} |
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else |
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mModuleIterator++; |
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} |
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else |
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{ |
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// A proxy has already been found or an error occured. |
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if (mCompletedCount == mLaunched) |
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{ |
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// Special case: all launched modules have been completed! |
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this->TimerStop(); |
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mMutex.Unlock(); |
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// -serialized- |
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this->Done(); // We are done. |
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} |
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else |
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{ |
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mCompletedMax = mLaunched; // Done at next module completion |
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this->TimerStop(); |
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mMutex.Unlock(); |
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} |
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} |
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} |
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|
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void |
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PXScan::Completed(PXScanModule * /* inCompletedModule */) |
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{ |
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mMutex.Lock(); |
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assert(mCompletedCount < mCompletedMax); |
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if (++mCompletedCount == mCompletedMax) |
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{ |
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this->TimerStop(); |
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mMutex.Unlock(); |
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// -serialized- |
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this->Done(); // We are done. |
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return; |
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} |
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mMutex.Unlock(); |
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} |
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|
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void |
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PXScan::Done() |
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{ |
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if (mStatus == PXSCAN_SCANNING) |
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this->ProxyNotFound(); |
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|
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delete this; |
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} |
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|
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void |
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PXScan::ProxyNotFound() |
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{ |
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list<PXScanQuery>::iterator i = mScanQueryList.begin(); |
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i->session->ScanCompletedNoProxy(i->query); |
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|
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for (; i != mScanQueryList.end(); i++) |
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i->session->ScanResultNoProxy(i->query, false); |
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} |
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|
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void |
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PXScan::ProxyFound(uint16_t inTypeOfProxy, uint16_t inPort, |
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const char *inDescr) |
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{ |
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mMutex.Lock(); |
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if (mStatus == PXSCAN_SCANNING) |
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{ |
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mStatus = PXSCAN_PROXY_FOUND; |
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|
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list<PXScanQuery>::iterator i = mScanQueryList.begin(); |
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i->session->ScanCompletedProxy(i->query, inTypeOfProxy, inPort, inDescr); |
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|
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for (; i != mScanQueryList.end(); i++) |
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i->session->ScanResultProxy(i->query, false, peak_time(), |
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inTypeOfProxy, inPort, |
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inDescr); |
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} |
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mMutex.Unlock(); |
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} |
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|
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void |
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PXScan::Error(int error) |
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{ |
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mMutex.Lock(); |
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if (mStatus == PXSCAN_SCANNING) |
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{ |
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mStatus = PXSCAN_ERROR; |
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|
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list<PXScanQuery>::iterator i = mScanQueryList.begin(); |
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i->session->ScanCompletedWithError(i->query); |
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|
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for (; i != mScanQueryList.end(); i++) |
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i->session->ScanResultError(i->query, error); |
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} |
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mMutex.Unlock(); |
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} |
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|
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void |
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PXScan::TimerStop() |
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{ |
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if (mScanTimer) |
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{ |
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peak_task_timer_remove(peak_task_self(), mScanTimer); /* auto release */ |
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mScanTimer = NULL; |
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} |
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} |
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|
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void |
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PXScan::TimerCallback(peak_timer ti, void *context) |
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{ |
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PXScan *scan = reinterpret_cast<PXScan*>(context); |
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|
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assert(scan->mScanTimer == NULL || ti == scan->mScanTimer); |
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|
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scan->Launch(); |
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} |
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