src/ServerList.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   5 // Copyright (c) 2002-2008 Merkur ( devs@emule-project.net / http://www.emule-project.net )
   6 //
   7 // Any parts of this program derived from the xMule, lMule or eMule project,
   8 // or contributed by third-party developers are copyrighted by their
   9 // respective authors.
  10 //
  11 // This program is free software; you can redistribute it and/or modify
  12 // it under the terms of the GNU General Public License as published by
  13 // the Free Software Foundation; either version 2 of the License, or
  14 // (at your option) any later version.
  15 //
  16 // This program is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20 //
  21 // You should have received a copy of the GNU General Public License
  22 // along with this program; if not, write to the Free Software
  23 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  24 //
  25
  26 #include <wx/wx.h>
  27
  28 #include "ServerList.h"                 // Interface declarations.
  29
  30 #include <protocol/Protocols.h>
  31 #include <protocol/ed2k/Constants.h>
  32 #include <common/DataFileVersion.h>
  33 #include <tags/ServerTags.h>
  34
  35 #include <wx/txtstrm.h>
  36 #include <wx/wfstream.h>
  37 #include <wx/url.h>                     // Needed for wxURL
  38 #include <wx/tokenzr.h>
  39
  40 #include "DownloadQueue.h"              // Needed for CDownloadQueue
  41 #include "ServerConnect.h"              // Needed for CServerConnect
  42 #include "Server.h"                     // Needed for CServer and SRV_PR_*
  43 #include "OtherStructs.h"               // Needed for ServerMet_Struct
  44 #include "CFile.h"                      // Needed for CFile
  45 #include "HTTPDownload.h"               // Needed for HTTPThread
  46 #include "Preferences.h"                // Needed for thePrefs
  47 #include "amule.h"                      // Needed for theApp
  48 #include "Statistics.h"                 // Needed for theStats
  49 #include "Packet.h"                     // Neeed for CPacket
  50 #include "Logger.h"
  51 #include "ScopedPtr.h"
  52 #include <common/Format.h>
  53 #include "IPFilter.h"
  54 #include <common/FileFunctions.h>       // Needed for UnpackArchive
  55
  56 CServerList::CServerList()
  57 {
  58         m_serverpos = m_servers.end();
  59         m_statserverpos = m_servers.end();
  60         m_nLastED2KServerLinkCheck = ::GetTickCount();
  61 }
  62
  63
  64 bool CServerList::Init()
  65 {
  66         // Load Metfile
  67         bool bRes = LoadServerMet(CPath(theApp->ConfigDir + wxT("server.met")));
  68
  69         // insert static servers from textfile
  70         LoadStaticServers(theApp->ConfigDir + wxT("staticservers.dat"));
  71
  72         // Send the auto-update of server.met via HTTPThread requests
  73         current_url_index = 0;
  74         if ( thePrefs::AutoServerlist()) {
  75                 AutoUpdate();
  76         }
  77
  78         return bRes;
  79 }
  80
  81
  82 bool CServerList::LoadServerMet(const CPath& path)
  83 {
  84         AddLogLineM(false, CFormat(_("Loading server.met file: %s")) % path);
  85
  86         bool merge = !m_servers.empty();
  87
  88         if (!path.FileExists()) {
  89                 AddLogLineM(false, _("Server.met file not found!"));
  90                 return false;
  91         }
  92
  93         // Try to unpack the file, might be an archive
  94         const wxChar* mets[] = { wxT("server.met"), NULL };
  95         // Try to unpack the file, might be an archive
  96         if (UnpackArchive(path, mets).second != EFT_Met) {
  97                 AddLogLineM(true, CFormat(_("Failed to load server.met file '%s', unknown format encountered.")) % path);
  98                 return false;
  99         }
 100
 101         CFile servermet(path, CFile::read);
 102         if ( !servermet.IsOpened() ){
 103                 AddLogLineM( false, _("Failed to open server.met!") );
 104                 return false;
 105         }
 106
 107
 108         try {
 109                 Notify_ServerFreeze();
 110
 111                 byte version = servermet.ReadUInt8();
 112
 113                 if (version != 0xE0 && version != MET_HEADER) {
 114                         AddLogLineM(true, wxString::Format(_("Server.met file corrupt, found invalid versiontag: 0x%x, size %i"), version, sizeof(version)));
 115                         Notify_ServerThaw();
 116                         return false;
 117                 }
 118
 119                 uint32 fservercount = servermet.ReadUInt32();
 120
 121                 ServerMet_Struct sbuffer;
 122                 uint32 iAddCount = 0;
 123
 124                 for ( uint32 j = 0; j < fservercount; ++j ) {
 125                         sbuffer.ip              = servermet.ReadUInt32();
 126                         sbuffer.port            = servermet.ReadUInt16();
 127                         sbuffer.tagcount        = servermet.ReadUInt32();
 128
 129                         CServer* newserver = new CServer(&sbuffer);
 130
 131                         // Load tags
 132                         for ( uint32 i = 0; i < sbuffer.tagcount; ++i ) {
 133                                 newserver->AddTagFromFile(&servermet);
 134                         }
 135
 136                         // Server priorities are not in sorted order
 137                         // High = 1, Low = 2, Normal = 0, so we have to check
 138                         // in a less logical fashion.
 139                         int priority = newserver->GetPreferences();
 140                         if (priority < SRV_PR_MIN || priority > SRV_PR_MAX) {
 141                                 newserver->SetPreference(SRV_PR_NORMAL);
 142                         }
 143
 144                         // set listname for server
 145                         if ( newserver->GetListName().IsEmpty() ) {
 146                                 newserver->SetListName(wxT("Server ") +newserver->GetAddress());
 147                         }
 148
 149
 150                         if ( !theApp->AddServer(newserver) ) {
 151                                 CServer* update = GetServerByAddress(newserver->GetAddress(), newserver->GetPort());
 152                                 if(update) {
 153                                         update->SetListName( newserver->GetListName());
 154                                         if(!newserver->GetDescription().IsEmpty()) {
 155                                                 update->SetDescription( newserver->GetDescription());
 156                                         }
 157                                         Notify_ServerRefresh(update);
 158                                 }
 159                                 delete newserver;
 160                         } else {
 161                                 ++iAddCount;
 162                         }
 163
 164                 }
 165
 166                 Notify_ServerThaw();
 167
 168                 if (!merge) {
 169                         AddLogLineM(true, wxString::Format(wxPLURAL("%i server in server.met found", "%i servers in server.met found", fservercount), fservercount));
 170                 } else {
 171                         AddLogLineM(true, wxString::Format(wxPLURAL("%d server added", "%d servers added", iAddCount), iAddCount));
 172                 }
 173         } catch (const CInvalidPacket& err) {
 174                 AddLogLineM(true, wxT("Error: the file server.met is corrupted: ") + err.what());
 175                 Notify_ServerThaw();
 176                 return false;
 177         } catch (const CSafeIOException& err) {
 178                 AddLogLineM(true, wxT("IO error while reading 'server.met': ") + err.what());
 179                 Notify_ServerThaw();
 180                 return false;
 181         }
 182
 183         return true;
 184 }
 185
 186
 187 bool CServerList::AddServer(CServer* in_server, bool fromUser)
 188 {
 189         if ( !in_server->GetPort() ) {
 190                 if ( fromUser ) {
 191                         AddLogLineM( true,
 192                                 CFormat( _("Server not added: [%s:%d] does not specify a valid port.") )
 193                                         % in_server->GetAddress()
 194                                         % in_server->GetPort()
 195                         );
 196                 }
 197
 198                 return false;
 199         } else if (
 200                                 !in_server->HasDynIP() &&
 201                                 (
 202                                         !IsGoodIP( in_server->GetIP(), thePrefs::FilterLanIPs() ) ||
 203                                         (       // don't test for filtered while ipfilter is still loading,
 204                                                 // it will be filtered when filter loading is finished
 205                                                 theApp->ipfilter->IsReady()
 206                                                 && theApp->ipfilter->IsFiltered(in_server->GetIP(), true))
 207                                 )
 208                   ) {
 209                 if ( fromUser ) {
 210                         AddLogLineM( true,
 211                                 CFormat( _("Server not added: The IP of [%s:%d] is filtered or invalid.") )
 212                                         % in_server->GetAddress()
 213                                         % in_server->GetPort()
 214                         );
 215                 }
 216
 217                 return false;
 218         }
 219
 220         CServer* test_server = GetServerByAddress(in_server->GetAddress(), in_server->GetPort());
 221         // Avoid duplicate (dynIP) servers: If the server which is to be added, is a dynIP-server
 222         // but we don't know yet it's DN, we need to search for an already available server with
 223         // that IP.
 224         if (test_server == NULL && in_server->GetIP() != 0) {
 225                 test_server = GetServerByIPTCP(in_server->GetIP(), in_server->GetPort());
 226         }
 227
 228         if (test_server) {
 229                 if ( fromUser ) {
 230                         AddLogLineM( true,
 231                                 CFormat( _("Server not added: Server with matching IP:Port [%s:%d] found in list.") )
 232                                         % in_server->GetAddress()
 233                                         % in_server->GetPort()
 234                         );
 235                 }
 236
 237                 test_server->ResetFailedCount();
 238                 Notify_ServerRefresh( test_server );
 239
 240                 return false;
 241         }
 242
 243         theStats::AddServer();
 244
 245         m_servers.push_back(in_server);
 246         NotifyObservers( EventType( EventType::INSERTED, in_server ) );
 247
 248         if ( fromUser ) {
 249                 AddLogLineM( true,
 250                         CFormat( _("Server added: Server at [%s:%d] using the name '%s'.") )
 251                                 % in_server->GetAddress()
 252                                 % in_server->GetPort()
 253                                 % in_server->GetListName()
 254                 );
 255         }
 256
 257
 258         return true;
 259 }
 260
 261
 262 void CServerList::ServerStats()
 263 {
 264         uint32 tNow = ::GetTickCount();
 265
 266         if (theApp->IsConnectedED2K() && m_servers.size() > 0) {
 267                 CServer* ping_server = GetNextStatServer();
 268                 CServer* test = ping_server;
 269                 if (!ping_server) {
 270                         return;
 271                 }
 272
 273                 while (ping_server->GetLastPingedTime() && (tNow - ping_server->GetLastPingedTime()) < UDPSERVSTATREASKTIME) {
 274                         ping_server = GetNextStatServer();
 275                         if (ping_server == test) {
 276                                 return;
 277                         }
 278                 }
 279
 280                 if (ping_server->GetFailedCount() >= thePrefs::GetDeadserverRetries() && thePrefs::DeadServer() && !ping_server->IsStaticMember()) {
 281                         RemoveServer(ping_server);
 282                         return;
 283                 }
 284
 285                 srand((unsigned)time(NULL));
 286                 ping_server->SetRealLastPingedTime(tNow); // this is not used to calcualte the next ping, but only to ensure a minimum delay for premature pings
 287                 if (!ping_server->GetCryptPingReplyPending() && (!ping_server->GetLastPingedTime() || (tNow - ping_server->GetLastPingedTime()) >= UDPSERVSTATREASKTIME) && theApp->GetPublicIP() && thePrefs::IsServerCryptLayerUDPEnabled()) {
 288                         // We try a obfsucation ping first and wait 20 seconds for an answer
 289                         // if it doesn't get responsed, we don't count it as error but continue with a normal ping
 290                         ping_server->SetCryptPingReplyPending(true);
 291                         uint32 nPacketLen = 4 + (uint8)(rand() % 16); // max padding 16 bytes
 292                         CScopedArray<byte> pRawPacket(nPacketLen);
 293                         uint32 dwChallenge = (rand() << 17) | (rand() << 2) | (rand() & 0x03);
 294                         if (dwChallenge == 0) {
 295                                 dwChallenge++;
 296                         }
 297
 298                         memcpy(pRawPacket.get(), &dwChallenge, sizeof(uint32));
 299                         for (uint32 i = 4; i < nPacketLen; i++) { // fillng up the remaining bytes with random data
 300                                 pRawPacket[i] = (uint8)rand();
 301                         }
 302
 303                         ping_server->SetChallenge(dwChallenge);
 304                         ping_server->SetLastPinged(tNow);
 305                         ping_server->SetLastPingedTime((tNow - (uint32)UDPSERVSTATREASKTIME) + 20); // give it 20 seconds to respond
 306
 307                         AddDebugLogLineM(false, logServerUDP, CFormat(wxT(">> Sending OP__GlobServStatReq (obfuscated) to server %s:%u")) % ping_server->GetAddress() % ping_server->GetPort());
 308
 309                         CPacket* packet = new CPacket(pRawPacket[1], nPacketLen - 2, pRawPacket[0]);
 310                         packet->CopyToDataBuffer(0, pRawPacket.get() + 2, nPacketLen - 2);
 311
 312                         theStats::AddUpOverheadServer(packet->GetPacketSize());
 313                         theApp->serverconnect->SendUDPPacket(packet, ping_server, true, true /*raw packet*/, 12 /* Port offset is 12 for obfuscated encryption*/);
 314                 } else if (ping_server->GetCryptPingReplyPending() || theApp->GetPublicIP() == 0 || !thePrefs::IsServerCryptLayerUDPEnabled()){
 315                         // our obfsucation ping request was not answered, so probably the server doesn'T supports obfuscation
 316                         // continue with a normal request
 317                         if (ping_server->GetCryptPingReplyPending() && thePrefs::IsServerCryptLayerUDPEnabled()) {
 318                                 AddDebugLogLineM(false, logServerUDP, wxT("CryptPing failed for server ") + ping_server->GetListName());
 319                         } else if (thePrefs::IsServerCryptLayerUDPEnabled()) {
 320                                 AddDebugLogLineM(false, logServerUDP, wxT("CryptPing skipped because our public IP is unknown for server ") + ping_server->GetListName());
 321                         }
 322
 323                         ping_server->SetCryptPingReplyPending(false);
 324
 325                         CPacket* packet = new CPacket(OP_GLOBSERVSTATREQ, 4, OP_EDONKEYPROT);
 326                         uint32 challenge = 0x55AA0000 + (uint16)rand();
 327                         ping_server->SetChallenge(challenge);
 328                         packet->CopyUInt32ToDataBuffer(challenge);
 329                         ping_server->SetLastPinged(tNow);
 330                         ping_server->SetLastPingedTime(tNow - (rand() % HR2S(1)));
 331                         ping_server->AddFailedCount();
 332                         Notify_ServerRefresh(ping_server);
 333                         theStats::AddUpOverheadServer(packet->GetPacketSize());
 334                         theApp->serverconnect->SendUDPPacket(packet, ping_server, true);
 335                 } else {
 336                         wxFAIL;
 337                 }
 338         }
 339 }
 340
 341
 342 void CServerList::RemoveServer(CServer* in_server)
 343 {
 344         if (in_server == theApp->serverconnect->GetCurrentServer()) {
 345                 theApp->ShowAlert(_("You are connected to the server you are trying to delete. please disconnect first."), _("Info"), wxOK);
 346         } else {
 347                 CInternalList::iterator it = std::find(m_servers.begin(), m_servers.end(), in_server);
 348                 if ( it != m_servers.end() ) {
 349                         if (theApp->downloadqueue->GetUDPServer() == in_server) {
 350                                 theApp->downloadqueue->SetUDPServer( 0 );
 351                         }
 352
 353                         NotifyObservers( EventType( EventType::REMOVED, in_server ) );
 354
 355                         if (m_serverpos == it) {
 356                                 ++m_serverpos;
 357                         }
 358                         if (m_statserverpos == it) {
 359                                 ++m_statserverpos;
 360                         }
 361                         m_servers.erase(it);
 362                         theStats::DeleteServer();
 363
 364                         Notify_ServerRemove(in_server);
 365                         delete in_server;
 366                 }
 367         }
 368 }
 369
 370
 371 void CServerList::RemoveAllServers()
 372 {
 373         NotifyObservers( EventType( EventType::CLEARED ) );
 374
 375         theStats::DeleteAllServers();
 376         // no connection, safely remove all servers
 377         while ( !m_servers.empty() ) {
 378                 delete m_servers.back();
 379                 m_servers.pop_back();
 380         }
 381         m_serverpos = m_servers.end();
 382         m_statserverpos = m_servers.end();
 383 }
 384
 385
 386 void CServerList::GetStatus(uint32 &failed, uint32 &user, uint32 &file, uint32 &tuser, uint32 &tfile,float &occ)
 387 {
 388         failed = 0;
 389         user = 0;
 390         file = 0;
 391         tuser=0;
 392         tfile = 0;
 393         occ=0;
 394         uint32 maxusers=0;
 395         uint32 tuserk = 0;
 396
 397         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 398                 const CServer* const curr = *it;
 399                 if( curr->GetFailedCount() ) {
 400                         ++failed;
 401                 } else {
 402                         user += curr->GetUsers();
 403                         file += curr->GetFiles();
 404                 }
 405                 tuser += curr->GetUsers();
 406                 tfile += curr->GetFiles();
 407
 408                 if (curr->GetMaxUsers()) {
 409                         tuserk += curr->GetUsers(); // total users on servers with known maximum
 410                         maxusers+=curr->GetMaxUsers();
 411                 }
 412         }
 413         if (maxusers>0) {
 414                 occ=(float)(tuserk*100)/maxusers;
 415         }
 416 }
 417
 418
 419 void CServerList::GetUserFileStatus(uint32 &user, uint32 &file)
 420 {
 421         user = 0;
 422         file = 0;
 423         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 424                 const CServer* const curr = *it;
 425                 if( !curr->GetFailedCount() ) {
 426                         user += curr->GetUsers();
 427                         file += curr->GetFiles();
 428                 }
 429         }
 430 }
 431
 432
 433 CServerList::~CServerList()
 434 {
 435         SaveServerMet();
 436         while ( !m_servers.empty() ) {
 437                 delete m_servers.back();
 438                 m_servers.pop_back();
 439         }
 440 }
 441
 442
 443 void CServerList::LoadStaticServers( const wxString& filename )
 444 {
 445         if ( !CPath::FileExists( filename ) ) {
 446                 return;
 447         }
 448
 449         wxFileInputStream stream( filename );
 450         wxTextInputStream f(stream);
 451
 452         while ( !stream.Eof() ) {
 453                 wxString line = f.ReadLine();
 454
 455                 // Skip comments
 456                 if ( line.GetChar(0) == '#' || line.GetChar(0) == '/') {
 457                         continue;
 458                 }
 459
 460                 wxStringTokenizer tokens( line, wxT(",") );
 461
 462                 if ( tokens.CountTokens() != 3 ) {
 463                         continue;
 464                 }
 465
 466
 467                 // format is host:port,priority,Name
 468                 wxString addy = tokens.GetNextToken().Strip( wxString::both );
 469                 wxString prio = tokens.GetNextToken().Strip( wxString::both );
 470                 wxString name = tokens.GetNextToken().Strip( wxString::both );
 471
 472                 wxString host = addy.BeforeFirst( wxT(':') );
 473                 wxString port = addy.AfterFirst( wxT(':') );
 474
 475
 476                 int priority = StrToLong( prio );
 477                 if (priority < SRV_PR_MIN || priority > SRV_PR_MAX) {
 478                         priority = SRV_PR_NORMAL;
 479                 }
 480
 481
 482                 // We need a valid name for the list
 483                 if ( name.IsEmpty() ) {
 484                         name = addy;
 485                 }
 486
 487
 488                 // create server object and add it to the list
 489                 CServer* server = new CServer( StrToLong( port ), host );
 490
 491                 server->SetListName( name );
 492                 server->SetIsStaticMember( true );
 493                 server->SetPreference( priority );
 494
 495
 496                 // Try to add the server to the list
 497                 if ( !theApp->AddServer( server ) ) {
 498                         delete server;
 499                         CServer* existing = GetServerByAddress( host, StrToULong( port ) );
 500                         if ( existing) {
 501                                 existing->SetListName( name );
 502                                 existing->SetIsStaticMember( true );
 503                                 existing->SetPreference( priority );
 504
 505                                 Notify_ServerRefresh( existing );
 506                         }
 507                 }
 508         }
 509 }
 510
 511
 512 struct ServerPriorityComparator {
 513         // Return true iff lhs should strictly appear earlier in the list than rhs.
 514         // In this case, we want higher priority servers to appear earlier.
 515         bool operator()(const CServer* lhs, const CServer* rhs) {
 516                 wxASSERT
 517                         (
 518                         rhs->GetPreferences() == SRV_PR_LOW             ||
 519                         rhs->GetPreferences() == SRV_PR_NORMAL  ||
 520                         rhs->GetPreferences() == SRV_PR_HIGH
 521                         );
 522                 switch (lhs->GetPreferences()) {
 523                         case SRV_PR_LOW:
 524                                 return false;
 525                         case SRV_PR_NORMAL:
 526                                 return rhs->GetPreferences() == SRV_PR_LOW;
 527                         case SRV_PR_HIGH:
 528                                 return rhs->GetPreferences() != SRV_PR_HIGH;
 529                         default:
 530                                 wxFAIL;
 531                                 return false;
 532                 }
 533         }
 534 };
 535
 536 void CServerList::Sort()
 537 {
 538         m_servers.sort(ServerPriorityComparator());
 539         // Once the list has been sorted, it doesn't really make sense to continue
 540         // traversing the new order from the old position.  Plus, there's a bug in
 541         // version of libstdc++ before gcc4 such that iterators that were equal to
 542         // end() were left dangling.
 543         m_serverpos = m_servers.begin();
 544         m_statserverpos = m_servers.begin();
 545 }
 546
 547
 548 CServer* CServerList::GetNextServer(bool bOnlyObfuscated)
 549 {
 550         while (bOnlyObfuscated && (m_serverpos != m_servers.end()) && !((*m_serverpos)->SupportsObfuscationTCP() || (*m_serverpos)->SupportsObfuscationUDP())) {
 551                 wxASSERT(*m_serverpos != NULL);
 552                 ++m_serverpos;
 553         }
 554
 555         if (m_serverpos == m_servers.end()) {
 556                 return 0;
 557         } else {
 558                 if (*m_serverpos) {
 559                         return *m_serverpos++;
 560                 } else {
 561                         return 0;
 562                 }
 563         }
 564 }
 565
 566
 567 CServer* CServerList::GetNextStatServer()
 568 {
 569         if (m_statserverpos == m_servers.end()) {
 570                 m_statserverpos = m_servers.begin();
 571         }
 572
 573         if (m_statserverpos == m_servers.end()) {
 574                 return 0;
 575         } else {
 576                 wxASSERT(*m_statserverpos != NULL);
 577                 return *m_statserverpos++;
 578         }
 579 }
 580
 581
 582 CServer* CServerList::GetServerByAddress(const wxString& address, uint16 port) const
 583 {
 584         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 585                 CServer* const s = *it;
 586                 if (port == s->GetPort() && s->GetAddress() == address) {
 587                         return s;
 588                 }
 589         }
 590         return NULL;
 591 }
 592
 593
 594 CServer* CServerList::GetServerByIP(uint32 nIP) const
 595 {
 596         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 597         CServer* const s = *it;
 598                 if (s->GetIP() == nIP)
 599                         return s;
 600         }
 601         return NULL;
 602 }
 603
 604
 605 CServer* CServerList::GetServerByIPTCP(uint32 nIP, uint16 nPort) const
 606 {
 607         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 608         CServer* const s = *it;
 609                 if (s->GetIP() == nIP && s->GetPort() == nPort)
 610                         return s;
 611         }
 612         return NULL;
 613 }
 614
 615 CServer* CServerList::GetServerByIPUDP(uint32 nIP, uint16 nUDPPort, bool bObfuscationPorts) const
 616 {
 617         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 618         CServer* const s =*it;
 619                 if (s->GetIP() == nIP
 620                         && (s->GetPort() == nUDPPort-4
 621                                 || (bObfuscationPorts && s->GetObfuscationPortUDP() == nUDPPort)
 622                                 || s->GetPort() == nUDPPort - 12))
 623                         return s;
 624         }
 625         return NULL;
 626 }
 627
 628 bool CServerList::SaveServerMet()
 629 {
 630         CPath newservermet = CPath(theApp->ConfigDir + wxT("server.met.new"));
 631
 632         CFile servermet( newservermet, CFile::write );
 633         if (!servermet.IsOpened()) {
 634                 AddLogLineM(false,_("Failed to save server.met!"));
 635                 return false;
 636         }
 637
 638
 639         try {
 640                 servermet.WriteUInt8(0xE0);
 641                 servermet.WriteUInt32( m_servers.size() );
 642
 643                 for ( CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 644                         const CServer* const server = *it;
 645
 646                         uint16 tagcount = 12;
 647                         if (!server->GetListName().IsEmpty()) {
 648                                 ++tagcount;
 649                         }
 650                         if (!server->GetDynIP().IsEmpty()) {
 651                                 ++tagcount;
 652                         }
 653                         if (!server->GetDescription().IsEmpty()) {
 654                                 ++tagcount;
 655                         }
 656                         if (server->GetConnPort() != server->GetPort()) {
 657                                 ++tagcount;
 658                         }
 659
 660                         // For unicoded name, description, and dynip
 661                         if ( !server->GetListName().IsEmpty() ) {
 662                                 ++tagcount;
 663                         }
 664                         if ( !server->GetDynIP().IsEmpty() ) {
 665                                 ++tagcount;
 666                         }
 667                         if ( !server->GetDescription().IsEmpty() ) {
 668                                 ++tagcount;
 669                         }
 670                         if (!server->GetVersion().IsEmpty()) {
 671                                 ++tagcount;
 672                         }
 673
 674                         if (server->GetServerKeyUDP(true)) {
 675                                 ++tagcount;
 676                         }
 677
 678                         if (server->GetServerKeyUDPIP()) {
 679                                 ++tagcount;
 680                         }
 681
 682                         if (server->GetObfuscationPortTCP()) {
 683                                 ++tagcount;
 684                         }
 685
 686                         if (server->GetObfuscationPortUDP()) {
 687                                 ++tagcount;
 688                         }
 689
 690                         servermet.WriteUInt32(server->GetIP());
 691                         servermet.WriteUInt16(server->GetPort());
 692                         servermet.WriteUInt32(tagcount);
 693
 694                         if ( !server->GetListName().IsEmpty() ) {
 695                                 // This is BOM to keep eMule compatibility
 696                                 CTagString( ST_SERVERNAME, server->GetListName()).WriteTagToFile( &servermet,  utf8strOptBOM);
 697                                 CTagString( ST_SERVERNAME, server->GetListName()).WriteTagToFile( &servermet );
 698                         }
 699
 700                         if ( !server->GetDynIP().IsEmpty() ) {
 701                                 // This is BOM to keep eMule compatibility
 702                                 CTagString( ST_DYNIP, server->GetDynIP()).WriteTagToFile( &servermet, utf8strOptBOM );
 703                                 CTagString( ST_DYNIP, server->GetDynIP()).WriteTagToFile( &servermet );
 704                         }
 705
 706                         if ( !server->GetDescription().IsEmpty() ) {
 707                                 // This is BOM to keep eMule compatibility
 708                                 CTagString( ST_DESCRIPTION, server->GetDescription()).WriteTagToFile( &servermet, utf8strOptBOM );
 709                                 CTagString( ST_DESCRIPTION, server->GetDescription()).WriteTagToFile( &servermet );
 710                         }
 711
 712                         if ( server->GetConnPort() != server->GetPort() ) {
 713                                 CTagString( ST_AUXPORTSLIST,    server->GetAuxPortsList()       ).WriteTagToFile( &servermet );
 714                         }
 715
 716                         CTagInt32( ST_FAIL,       server->GetFailedCount()   ).WriteTagToFile( &servermet );
 717                         CTagInt32( ST_PREFERENCE, server->GetPreferences()   ).WriteTagToFile( &servermet );
 718                         CTagInt32( wxT("users"),  server->GetUsers()         ).WriteTagToFile( &servermet );
 719                         CTagInt32( wxT("files"),  server->GetFiles()         ).WriteTagToFile( &servermet );
 720                         CTagInt32( ST_PING,       server->GetPing()          ).WriteTagToFile( &servermet );
 721                         CTagInt32( ST_LASTPING,   server->GetLastPingedTime()).WriteTagToFile( &servermet );
 722                         CTagInt32( ST_MAXUSERS,   server->GetMaxUsers()      ).WriteTagToFile( &servermet );
 723                         CTagInt32( ST_SOFTFILES,  server->GetSoftFiles()     ).WriteTagToFile( &servermet );
 724                         CTagInt32( ST_HARDFILES,  server->GetHardFiles()     ).WriteTagToFile( &servermet );
 725                         if (!server->GetVersion().IsEmpty()){
 726                                 CTagString( ST_VERSION, server->GetVersion() ).WriteTagToFile( &servermet, utf8strOptBOM );
 727                                 CTagString( ST_VERSION, server->GetVersion() ).WriteTagToFile( &servermet );
 728                         }
 729                         CTagInt32( ST_UDPFLAGS,   server->GetUDPFlags()      ).WriteTagToFile( &servermet );
 730                         CTagInt32( ST_LOWIDUSERS, server->GetLowIDUsers()    ).WriteTagToFile( &servermet );
 731
 732                         if (server->GetServerKeyUDP(true)) {
 733                                 CTagInt32(ST_UDPKEY, server->GetServerKeyUDP(true)).WriteTagToFile( &servermet );;
 734                         }
 735
 736                         if (server->GetServerKeyUDPIP()) {
 737                                 CTagInt32(ST_UDPKEYIP, server->GetServerKeyUDPIP()).WriteTagToFile( &servermet );;;
 738                         }
 739
 740                         if (server->GetObfuscationPortTCP()) {
 741                                 CTagInt16(ST_TCPPORTOBFUSCATION, server->GetObfuscationPortTCP()).WriteTagToFile( &servermet );;;
 742                         }
 743
 744                         if (server->GetObfuscationPortUDP()) {
 745                                 CTagInt16(ST_UDPPORTOBFUSCATION, server->GetObfuscationPortUDP()).WriteTagToFile( &servermet );;;
 746                         }
 747
 748                 }
 749         } catch (const CIOFailureException& e) {
 750                 AddLogLineM(true, wxT("IO failure while writing 'server.met': ") + e.what());
 751                 return false;
 752         }
 753
 754         servermet.Close();
 755         const CPath curservermet = CPath(theApp->ConfigDir + wxT("server.met"));
 756         const CPath oldservermet = CPath(theApp->ConfigDir + wxT("server_met.old"));
 757
 758         if (oldservermet.FileExists()) {
 759                 CPath::RemoveFile(oldservermet);
 760         }
 761
 762         if (curservermet.FileExists()) {
 763                 CPath::RenameFile(curservermet, oldservermet);
 764         }
 765
 766         CPath::RenameFile(newservermet, curservermet);
 767
 768         return true;
 769 }
 770
 771
 772 void CServerList::RemoveDeadServers()
 773 {
 774         if ( thePrefs::DeadServer() ) {
 775                 for ( CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ) {
 776                         CServer* server = *it++;
 777                         if ( server->GetFailedCount() > thePrefs::GetDeadserverRetries() && !server->IsStaticMember()) {
 778                                 RemoveServer(server);
 779                         }
 780                 }
 781         }
 782 }
 783
 784 void CServerList::UpdateServerMetFromURL(const wxString& strURL)
 785 {
 786         if (strURL.Find(wxT("://")) == -1) {
 787                 AddLogLineM(true, _("Invalid URL"));
 788                 return;
 789         }
 790         m_URLUpdate = strURL;
 791         wxString strTempFilename(theApp->ConfigDir + wxT("server.met.download"));
 792         CHTTPDownloadThread *downloader = new CHTTPDownloadThread(strURL, strTempFilename, theApp->ConfigDir + wxT("server.met"), HTTP_ServerMet);
 793         downloader->Create();
 794         downloader->Run();
 795 }
 796
 797
 798 void CServerList::DownloadFinished(uint32 result)
 799 {
 800         if(result == HTTP_Success) {
 801                 const CPath tempFilename = CPath(theApp->ConfigDir + wxT("server.met.download"));
 802
 803                 // curl succeeded. proceed with server.met loading
 804                 LoadServerMet(tempFilename);
 805                 SaveServerMet();
 806
 807                 // So, file is loaded and merged, and also saved
 808                 CPath::RemoveFile(tempFilename);
 809                 AddLogLineN(CFormat(_("Finished downloading the server list from %s")) % m_URLUpdate);
 810         } else if (result == HTTP_Skipped) {
 811                 AddLogLineN(CFormat(_("Skipped download of %s, because requested file is not newer.")) % wxT("server.met"));
 812         } else {
 813                 AddLogLineC(CFormat(_("Failed to download %s from %s")) % wxT("server.met") % m_URLUpdate);
 814         }
 815 }
 816
 817
 818 void CServerList::AutoUpdate()
 819 {
 820
 821         uint8 url_count = theApp->glob_prefs->adresses_list.GetCount();
 822
 823         if (!url_count) {
 824                 AddLogLineM(true, _("No server list address entry in 'addresses.dat' found. Please paste a valid server list address into this file in order to auto-update your server list"));
 825                 return;
 826         }
 827         // Do current URL. Callback function will take care of the others.
 828         while ( current_url_index < url_count ) {
 829                 wxString URI = theApp->glob_prefs->adresses_list[current_url_index];
 830                 // We use wxURL to validate the URI
 831                 if ( wxURL( URI ).GetError() == wxURL_NOERR ) {
 832                         // Ok, got a valid URI
 833                         m_URLUpdate = URI;
 834                         wxString strTempFilename =
 835                                 theApp->ConfigDir + wxT("server_auto.met");
 836                         AddLogLineM(true, CFormat(
 837                                 _("Start downloading server list from %s")) % URI);
 838                         CHTTPDownloadThread *downloader = new CHTTPDownloadThread(
 839                                 URI, strTempFilename, theApp->ConfigDir + wxT("server.met"), HTTP_ServerMetAuto);
 840                         downloader->Create();
 841                         downloader->Run();
 842
 843                         return;
 844                 } else {
 845                         AddLogLineM(true, CFormat(
 846                                 _("WARNING: invalid URL specified for auto-updating of servers: %s") ) % URI);
 847                 }
 848                 current_url_index++;
 849         }
 850         AddLogLineM(true, _("No valid server.met auto-download url on addresses.dat"));
 851 }
 852
 853
 854 void CServerList::AutoDownloadFinished(uint32 result)
 855 {
 856         if (result == HTTP_Success) {
 857                 CPath tempFilename = CPath(theApp->ConfigDir + wxT("server_auto.met"));
 858
 859                 // curl succeeded. proceed with server.met loading
 860                 LoadServerMet(tempFilename);
 861                 SaveServerMet();
 862
 863                 // So, file is loaded and merged, and also saved
 864                 CPath::RemoveFile(tempFilename);
 865         } else {
 866                 AddLogLineM(true, CFormat(_("Failed to download the server list from %s") ) % m_URLUpdate);
 867         }
 868
 869         ++current_url_index;
 870
 871         if (current_url_index < theApp->glob_prefs->adresses_list.GetCount()) {
 872                 // Next!
 873                 AutoUpdate();
 874         }
 875 }
 876
 877
 878 void CServerList::ObserverAdded( ObserverType* o )
 879 {
 880         CObservableQueue<CServer*>::ObserverAdded( o );
 881
 882         EventType::ValueList ilist;
 883         ilist.reserve( m_servers.size() );
 884         ilist.assign( m_servers.begin(), m_servers.end() );
 885
 886         NotifyObservers( EventType( EventType::INITIAL, &ilist ), o );
 887 }
 888
 889
 890 uint32 CServerList::GetAvgFile() const
 891 {
 892         //Since there is no real way to know how many files are in the kad network,
 893         //I figure to try to use the ED2K network stats to find how many files the
 894         //average user shares..
 895         uint32 totaluser = 0;
 896         uint32 totalfile = 0;
 897         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 898                 const CServer* const curr = *it;
 899                 //If this server has reported Users/Files and doesn't limit it's files too much
 900                 //use this in the calculation..
 901                 if( curr->GetUsers() && curr->GetFiles() && curr->GetSoftFiles() > 1000 ) {
 902                         totaluser += curr->GetUsers();
 903                         totalfile += curr->GetFiles();
 904                 }
 905         }
 906         //If the user count is a little low, don't send back a average..
 907         //I added 50 to the count as many servers do not allow a large amount of files to be shared..
 908         //Therefore the estimate here will be lower then the actual.
 909         //I would love to add a way for the client to send some statistics back so we could see the real
 910         //values here..
 911         if ( totaluser > 500000 ) {
 912                 return (totalfile/totaluser)+50;
 913         } else {
 914                 return 0;
 915         }
 916 }
 917
 918
 919 std::vector<const CServer*> CServerList::CopySnapshot() const
 920 {
 921         std::vector<const CServer*> result;
 922         result.reserve(m_servers.size());
 923         result.assign(m_servers.begin(), m_servers.end());
 924         return result;
 925 }
 926
 927
 928 void CServerList::FilterServers()
 929 {
 930         CInternalList::iterator it = m_servers.begin();
 931         while (it != m_servers.end()) {
 932                 CServer* server = *it++;
 933
 934                 if (server->HasDynIP()) {
 935                         continue;
 936                 }
 937
 938                 if (theApp->ipfilter->IsFiltered(server->GetIP(), true)) {
 939                         if (server == theApp->serverconnect->GetCurrentServer()) {
 940                                 AddLogLineM(true, _("Local server is filtered by the IPFilters, reconnecting to a different server!"));
 941                                 theApp->serverconnect->Disconnect();
 942                                 RemoveServer(server);
 943                                 theApp->serverconnect->ConnectToAnyServer();
 944                         } else {
 945                                 RemoveServer(server);
 946                         }
 947                 }
 948         }
 949 }
 950
 951 void CServerList::CheckForExpiredUDPKeys() {
 952
 953         if (!thePrefs::IsServerCryptLayerUDPEnabled()) {
 954                 return;
 955         }
 956
 957         uint32 cKeysTotal = 0;
 958         uint32 cKeysExpired = 0;
 959         uint32 cPingDelayed = 0;
 960         const uint32 dwIP = theApp->GetPublicIP();
 961         const uint32 tNow = ::GetTickCount();
 962         wxASSERT( dwIP != 0 );
 963
 964         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 965         CServer* pServer = *it;
 966                 if (pServer->SupportsObfuscationUDP() && pServer->GetServerKeyUDP(true) != 0 && pServer->GetServerKeyUDPIP() != dwIP){
 967                         cKeysTotal++;
 968                         cKeysExpired++;
 969                         if (tNow - pServer->GetRealLastPingedTime() < UDPSERVSTATMINREASKTIME){
 970                                 cPingDelayed++;
 971                                 // next ping: Now + (MinimumDelay - already elapsed time)
 972                                 pServer->SetLastPingedTime((tNow - (uint32)UDPSERVSTATREASKTIME) + (UDPSERVSTATMINREASKTIME - (tNow - pServer->GetRealLastPingedTime())));
 973                         } else {
 974                                 pServer->SetLastPingedTime(0);
 975                         }
 976                 } else if (pServer->SupportsObfuscationUDP() && pServer->GetServerKeyUDP(false) != 0) {
 977                         cKeysTotal++;
 978                 }
 979         }
 980 }
 981 // File_checked_for_headers