src/ServerList.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2003-2011 aMule Team ( admin@amule.org / http://www.amule.org )
   5 // Copyright (c) 2002-2011 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 #include <common/TextFile.h>    // Needed for CTextFile
  56
  57 CServerList::CServerList()
  58 {
  59         m_serverpos = m_servers.end();
  60         m_statserverpos = m_servers.end();
  61         m_nLastED2KServerLinkCheck = ::GetTickCount();
  62         m_initialized = false;
  63 }
  64
  65
  66 bool CServerList::Init()
  67 {
  68         // Load Metfile
  69         bool bRes = LoadServerMet(CPath(theApp->ConfigDir + wxT("server.met")));
  70
  71         // insert static servers from textfile
  72         m_staticServersConfig = theApp->ConfigDir + wxT("staticservers.dat");
  73         LoadStaticServers();
  74
  75         // Send the auto-update of server.met via HTTPThread requests
  76         current_url_index = 0;
  77         if ( thePrefs::AutoServerlist()) {
  78                 AutoUpdate();
  79         }
  80
  81         m_initialized = true;
  82         return bRes;
  83 }
  84
  85
  86 bool CServerList::LoadServerMet(const CPath& path)
  87 {
  88         AddLogLineN(CFormat(_("Loading server.met file: %s")) % path);
  89
  90         bool merge = !m_servers.empty();
  91
  92         if (!path.FileExists()) {
  93                 AddLogLineN(_("Server.met file not found!"));
  94                 return false;
  95         }
  96
  97         // Try to unpack the file, might be an archive
  98         const wxChar* mets[] = { wxT("server.met"), NULL };
  99         // Try to unpack the file, might be an archive
 100         if (UnpackArchive(path, mets).second != EFT_Met) {
 101                 AddLogLineC(CFormat(_("Failed to load server.met file '%s', unknown format encountered.")) % path);
 102                 return false;
 103         }
 104
 105         CFile servermet(path, CFile::read);
 106         if ( !servermet.IsOpened() ){
 107                 AddLogLineN(_("Failed to open server.met!") );
 108                 return false;
 109         }
 110
 111
 112         try {
 113                 Notify_ServerFreeze();
 114
 115                 byte version = servermet.ReadUInt8();
 116
 117                 if (version != 0xE0 && version != MET_HEADER) {
 118                         AddLogLineC(CFormat(_("Server.met file corrupt, found invalid versiontag: 0x%x, size %i")) % version % sizeof(version));
 119                         Notify_ServerThaw();
 120                         return false;
 121                 }
 122
 123                 uint32 fservercount = servermet.ReadUInt32();
 124
 125                 ServerMet_Struct sbuffer;
 126                 uint32 iAddCount = 0;
 127
 128                 for ( uint32 j = 0; j < fservercount; ++j ) {
 129                         sbuffer.ip              = servermet.ReadUInt32();
 130                         sbuffer.port            = servermet.ReadUInt16();
 131                         sbuffer.tagcount        = servermet.ReadUInt32();
 132
 133                         CServer* newserver = new CServer(&sbuffer);
 134
 135                         // Load tags
 136                         for ( uint32 i = 0; i < sbuffer.tagcount; ++i ) {
 137                                 newserver->AddTagFromFile(&servermet);
 138                         }
 139
 140                         // Server priorities are not in sorted order
 141                         // High = 1, Low = 2, Normal = 0, so we have to check
 142                         // in a less logical fashion.
 143                         int priority = newserver->GetPreferences();
 144                         if (priority < SRV_PR_MIN || priority > SRV_PR_MAX) {
 145                                 newserver->SetPreference(SRV_PR_NORMAL);
 146                         }
 147
 148                         // set listname for server
 149                         if ( newserver->GetListName().IsEmpty() ) {
 150                                 newserver->SetListName(wxT("Server ") +newserver->GetAddress());
 151                         }
 152
 153
 154                         if ( !theApp->AddServer(newserver) ) {
 155                                 CServer* update = GetServerByAddress(newserver->GetAddress(), newserver->GetPort());
 156                                 if(update) {
 157                                         update->SetListName( newserver->GetListName());
 158                                         if(!newserver->GetDescription().IsEmpty()) {
 159                                                 update->SetDescription( newserver->GetDescription());
 160                                         }
 161                                         Notify_ServerRefresh(update);
 162                                 }
 163                                 delete newserver;
 164                         } else {
 165                                 ++iAddCount;
 166                         }
 167
 168                 }
 169
 170                 Notify_ServerThaw();
 171
 172                 if (!merge) {
 173                         AddLogLineC(CFormat(wxPLURAL("%i server in server.met found", "%i servers in server.met found", fservercount)) % fservercount);
 174                 } else {
 175                         AddLogLineC(CFormat(wxPLURAL("%d server added", "%d servers added", iAddCount)) % iAddCount);
 176                 }
 177         } catch (const CInvalidPacket& err) {
 178                 AddLogLineC(_("Error: the file 'server.met' is corrupted: ") + err.what());
 179                 Notify_ServerThaw();
 180                 return false;
 181         } catch (const CSafeIOException& err) {
 182                 AddLogLineC(_("IO error while reading 'server.met': ") + err.what());
 183                 Notify_ServerThaw();
 184                 return false;
 185         }
 186
 187         return true;
 188 }
 189
 190
 191 bool CServerList::AddServer(CServer* in_server, bool fromUser)
 192 {
 193         if ( !in_server->GetPort() ) {
 194                 if ( fromUser ) {
 195                         AddLogLineC(CFormat( _("Server not added: [%s:%d] does not specify a valid port.") )
 196                                         % in_server->GetAddress()
 197                                         % in_server->GetPort()
 198                         );
 199                 }
 200
 201                 return false;
 202         } else if (
 203                                 !in_server->HasDynIP() &&
 204                                 (
 205                                         !IsGoodIP( in_server->GetIP(), thePrefs::FilterLanIPs() ) ||
 206                                         (       // don't test for filtered while ipfilter is still loading,
 207                                                 // it will be filtered when filter loading is finished
 208                                                 theApp->ipfilter->IsReady()
 209                                                 && theApp->ipfilter->IsFiltered(in_server->GetIP(), true))
 210                                 )
 211                   ) {
 212                 if ( fromUser ) {
 213                         AddLogLineC(CFormat( _("Server not added: The IP of [%s:%d] is filtered or invalid.") )
 214                                         % in_server->GetAddress()
 215                                         % in_server->GetPort()
 216                         );
 217                 }
 218
 219                 return false;
 220         }
 221
 222         CServer* test_server = GetServerByAddress(in_server->GetAddress(), in_server->GetPort());
 223         // Avoid duplicate (dynIP) servers: If the server which is to be added, is a dynIP-server
 224         // but we don't know yet it's DN, we need to search for an already available server with
 225         // that IP.
 226         if (test_server == NULL && in_server->GetIP() != 0) {
 227                 test_server = GetServerByIPTCP(in_server->GetIP(), in_server->GetPort());
 228         }
 229
 230         if (test_server) {
 231                 if ( fromUser ) {
 232                         AddLogLineC(CFormat( _("Server not added: Server with matching IP:Port [%s:%d] found in list.") )
 233                                         % in_server->GetAddress()
 234                                         % in_server->GetPort()
 235                         );
 236                 }
 237
 238                 test_server->ResetFailedCount();
 239                 Notify_ServerRefresh( test_server );
 240
 241                 return false;
 242         }
 243
 244         theStats::AddServer();
 245
 246         m_servers.push_back(in_server);
 247         NotifyObservers( EventType( EventType::INSERTED, in_server ) );
 248
 249         if ( fromUser ) {
 250                 AddLogLineC(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                         AddDebugLogLineN(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                                 AddDebugLogLineN(logServerUDP, wxT("CryptPing failed for server ") + ping_server->GetListName());
 319                         } else if (thePrefs::IsServerCryptLayerUDPEnabled()) {
 320                                 AddDebugLogLineN(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         if (thePrefs::GetNetworkED2K() && IsInitialized()) {
 436                 SaveServerMet();
 437         }
 438         while ( !m_servers.empty() ) {
 439                 delete m_servers.back();
 440                 m_servers.pop_back();
 441         }
 442 }
 443
 444
 445 void CServerList::LoadStaticServers()
 446 {
 447         if ( !CPath::FileExists(m_staticServersConfig) ) {
 448                 return;
 449         }
 450
 451         wxFileInputStream stream(m_staticServersConfig);
 452         wxTextInputStream f(stream);
 453
 454         while ( !stream.Eof() ) {
 455                 wxString line = f.ReadLine();
 456
 457                 // Skip comments
 458                 if (line.IsEmpty() || line.GetChar(0) == '#' || line.GetChar(0) == '/') {
 459                         continue;
 460                 }
 461
 462                 wxStringTokenizer tokens( line, wxT(",") );
 463
 464                 if ( tokens.CountTokens() != 3 ) {
 465                         continue;
 466                 }
 467
 468
 469                 // format is host:port,priority,Name
 470                 wxString addy = tokens.GetNextToken().Strip( wxString::both );
 471                 wxString prio = tokens.GetNextToken().Strip( wxString::both );
 472                 wxString name = tokens.GetNextToken().Strip( wxString::both );
 473
 474                 wxString host = addy.BeforeFirst( wxT(':') );
 475                 wxString port = addy.AfterFirst( wxT(':') );
 476
 477
 478                 int priority = StrToLong( prio );
 479                 if (priority < SRV_PR_MIN || priority > SRV_PR_MAX) {
 480                         priority = SRV_PR_NORMAL;
 481                 }
 482
 483
 484                 // We need a valid name for the list
 485                 if ( name.IsEmpty() ) {
 486                         name = addy;
 487                 }
 488
 489
 490                 // create server object and add it to the list
 491                 CServer* server = new CServer( StrToLong( port ), host );
 492
 493                 server->SetListName( name );
 494                 server->SetIsStaticMember( true );
 495                 server->SetPreference( priority );
 496
 497
 498                 // Try to add the server to the list
 499                 if ( !theApp->AddServer( server ) ) {
 500                         delete server;
 501                         CServer* existing = GetServerByAddress( host, StrToULong( port ) );
 502                         if ( existing) {
 503                                 existing->SetListName( name );
 504                                 existing->SetIsStaticMember( true );
 505                                 existing->SetPreference( priority );
 506
 507                                 Notify_ServerRefresh( existing );
 508                         }
 509                 }
 510         }
 511 }
 512
 513 void CServerList::SaveStaticServers()
 514 {
 515         CTextFile file;
 516         if (!file.Open(m_staticServersConfig, CTextFile::write)) {
 517                 AddLogLineN(CFormat( _("Failed to open '%s'") ) % m_staticServersConfig );
 518                 return;
 519         }
 520
 521         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 522                 const CServer* server = *it;
 523
 524                 if (server->IsStaticMember()) {
 525                         file.WriteLine(CFormat(wxT("%s:%u,%u,%s"))
 526                                 % server->GetAddress() % server->GetPort()
 527                                 % server->GetPreferences() % server->GetListName());
 528                 }
 529         }
 530
 531         file.Close();
 532 }
 533
 534 struct ServerPriorityComparator {
 535         // Return true iff lhs should strictly appear earlier in the list than rhs.
 536         // In this case, we want higher priority servers to appear earlier.
 537         bool operator()(const CServer* lhs, const CServer* rhs) {
 538                 wxASSERT
 539                         (
 540                         rhs->GetPreferences() == SRV_PR_LOW             ||
 541                         rhs->GetPreferences() == SRV_PR_NORMAL  ||
 542                         rhs->GetPreferences() == SRV_PR_HIGH
 543                         );
 544                 switch (lhs->GetPreferences()) {
 545                         case SRV_PR_LOW:
 546                                 return false;
 547                         case SRV_PR_NORMAL:
 548                                 return rhs->GetPreferences() == SRV_PR_LOW;
 549                         case SRV_PR_HIGH:
 550                                 return rhs->GetPreferences() != SRV_PR_HIGH;
 551                         default:
 552                                 wxFAIL;
 553                                 return false;
 554                 }
 555         }
 556 };
 557
 558 void CServerList::Sort()
 559 {
 560         m_servers.sort(ServerPriorityComparator());
 561         // Once the list has been sorted, it doesn't really make sense to continue
 562         // traversing the new order from the old position.  Plus, there's a bug in
 563         // version of libstdc++ before gcc4 such that iterators that were equal to
 564         // end() were left dangling.
 565         m_serverpos = m_servers.begin();
 566         m_statserverpos = m_servers.begin();
 567 }
 568
 569
 570 CServer* CServerList::GetNextServer(bool bOnlyObfuscated)
 571 {
 572         while (bOnlyObfuscated && (m_serverpos != m_servers.end()) && !((*m_serverpos)->SupportsObfuscationTCP() || (*m_serverpos)->SupportsObfuscationUDP())) {
 573                 wxASSERT(*m_serverpos != NULL);
 574                 ++m_serverpos;
 575         }
 576
 577         if (m_serverpos == m_servers.end()) {
 578                 return 0;
 579         } else {
 580                 if (*m_serverpos) {
 581                         return *m_serverpos++;
 582                 } else {
 583                         return 0;
 584                 }
 585         }
 586 }
 587
 588
 589 CServer* CServerList::GetNextStatServer()
 590 {
 591         if (m_statserverpos == m_servers.end()) {
 592                 m_statserverpos = m_servers.begin();
 593         }
 594
 595         if (m_statserverpos == m_servers.end()) {
 596                 return 0;
 597         } else {
 598                 wxASSERT(*m_statserverpos != NULL);
 599                 return *m_statserverpos++;
 600         }
 601 }
 602
 603
 604 CServer* CServerList::GetServerByAddress(const wxString& address, uint16 port) const
 605 {
 606         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 607                 CServer* const s = *it;
 608                 if (port == s->GetPort() && s->GetAddress() == address) {
 609                         return s;
 610                 }
 611         }
 612         return NULL;
 613 }
 614
 615
 616 CServer* CServerList::GetServerByIP(uint32 nIP) const
 617 {
 618         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 619         CServer* const s = *it;
 620                 if (s->GetIP() == nIP)
 621                         return s;
 622         }
 623         return NULL;
 624 }
 625
 626
 627 CServer* CServerList::GetServerByIPTCP(uint32 nIP, uint16 nPort) const
 628 {
 629         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 630         CServer* const s = *it;
 631                 if (s->GetIP() == nIP && s->GetPort() == nPort)
 632                         return s;
 633         }
 634         return NULL;
 635 }
 636
 637
 638 CServer* CServerList::GetServerByIPUDP(uint32 nIP, uint16 nUDPPort, bool bObfuscationPorts) const
 639 {
 640         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 641         CServer* const s =*it;
 642                 if (s->GetIP() == nIP
 643                         && (s->GetPort() == nUDPPort-4
 644                                 || (bObfuscationPorts && s->GetObfuscationPortUDP() == nUDPPort)
 645                                 || s->GetPort() == nUDPPort - 12))
 646                         return s;
 647         }
 648         return NULL;
 649 }
 650
 651
 652 CServer* CServerList::GetServerByECID(uint32 ecid) const
 653 {
 654         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 655         CServer* const s = *it;
 656                 if (s->ECID() == ecid) {
 657                         return s;
 658                 }
 659         }
 660         return NULL;
 661 }
 662
 663
 664 void CServerList::SetStaticServer(CServer* server, bool isStatic)
 665 {
 666         server->SetIsStaticMember(isStatic);
 667         Notify_ServerRefresh(server);
 668         SaveStaticServers();
 669 }
 670
 671
 672 void CServerList::SetServerPrio(CServer* server, uint32 prio)
 673 {
 674         server->SetPreference(prio);
 675         Notify_ServerRefresh(server);
 676 }
 677
 678
 679 bool CServerList::SaveServerMet()
 680 {
 681         CPath curservermet = CPath(theApp->ConfigDir + wxT("server.met"));
 682
 683         CFile servermet(curservermet, CFile::write_safe);
 684         if (!servermet.IsOpened()) {
 685                 AddLogLineN(_("Failed to save server.met!"));
 686                 return false;
 687         }
 688
 689         try {
 690                 servermet.WriteUInt8(0xE0);
 691                 servermet.WriteUInt32( m_servers.size() );
 692
 693                 for ( CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 694                         const CServer* const server = *it;
 695
 696                         uint16 tagcount = 12;
 697                         if (!server->GetListName().IsEmpty()) {
 698                                 ++tagcount;
 699                         }
 700                         if (!server->GetDynIP().IsEmpty()) {
 701                                 ++tagcount;
 702                         }
 703                         if (!server->GetDescription().IsEmpty()) {
 704                                 ++tagcount;
 705                         }
 706                         if (server->GetConnPort() != server->GetPort()) {
 707                                 ++tagcount;
 708                         }
 709
 710                         // For unicoded name, description, and dynip
 711                         if ( !server->GetListName().IsEmpty() ) {
 712                                 ++tagcount;
 713                         }
 714                         if ( !server->GetDynIP().IsEmpty() ) {
 715                                 ++tagcount;
 716                         }
 717                         if ( !server->GetDescription().IsEmpty() ) {
 718                                 ++tagcount;
 719                         }
 720                         if (!server->GetVersion().IsEmpty()) {
 721                                 ++tagcount;
 722                         }
 723
 724                         if (server->GetServerKeyUDP(true)) {
 725                                 ++tagcount;
 726                         }
 727
 728                         if (server->GetServerKeyUDPIP()) {
 729                                 ++tagcount;
 730                         }
 731
 732                         if (server->GetObfuscationPortTCP()) {
 733                                 ++tagcount;
 734                         }
 735
 736                         if (server->GetObfuscationPortUDP()) {
 737                                 ++tagcount;
 738                         }
 739
 740                         servermet.WriteUInt32(server->GetIP());
 741                         servermet.WriteUInt16(server->GetPort());
 742                         servermet.WriteUInt32(tagcount);
 743
 744                         if ( !server->GetListName().IsEmpty() ) {
 745                                 // This is BOM to keep eMule compatibility
 746                                 CTagString( ST_SERVERNAME, server->GetListName()).WriteTagToFile( &servermet,  utf8strOptBOM);
 747                                 CTagString( ST_SERVERNAME, server->GetListName()).WriteTagToFile( &servermet );
 748                         }
 749
 750                         if ( !server->GetDynIP().IsEmpty() ) {
 751                                 // This is BOM to keep eMule compatibility
 752                                 CTagString( ST_DYNIP, server->GetDynIP()).WriteTagToFile( &servermet, utf8strOptBOM );
 753                                 CTagString( ST_DYNIP, server->GetDynIP()).WriteTagToFile( &servermet );
 754                         }
 755
 756                         if ( !server->GetDescription().IsEmpty() ) {
 757                                 // This is BOM to keep eMule compatibility
 758                                 CTagString( ST_DESCRIPTION, server->GetDescription()).WriteTagToFile( &servermet, utf8strOptBOM );
 759                                 CTagString( ST_DESCRIPTION, server->GetDescription()).WriteTagToFile( &servermet );
 760                         }
 761
 762                         if ( server->GetConnPort() != server->GetPort() ) {
 763                                 CTagString( ST_AUXPORTSLIST,    server->GetAuxPortsList()       ).WriteTagToFile( &servermet );
 764                         }
 765
 766                         CTagInt32( ST_FAIL,       server->GetFailedCount()   ).WriteTagToFile( &servermet );
 767                         CTagInt32( ST_PREFERENCE, server->GetPreferences()   ).WriteTagToFile( &servermet );
 768                         CTagInt32( wxT("users"),  server->GetUsers()         ).WriteTagToFile( &servermet );
 769                         CTagInt32( wxT("files"),  server->GetFiles()         ).WriteTagToFile( &servermet );
 770                         CTagInt32( ST_PING,       server->GetPing()          ).WriteTagToFile( &servermet );
 771                         CTagInt32( ST_LASTPING,   server->GetLastPingedTime()).WriteTagToFile( &servermet );
 772                         CTagInt32( ST_MAXUSERS,   server->GetMaxUsers()      ).WriteTagToFile( &servermet );
 773                         CTagInt32( ST_SOFTFILES,  server->GetSoftFiles()     ).WriteTagToFile( &servermet );
 774                         CTagInt32( ST_HARDFILES,  server->GetHardFiles()     ).WriteTagToFile( &servermet );
 775                         if (!server->GetVersion().IsEmpty()){
 776                                 CTagString( ST_VERSION, server->GetVersion() ).WriteTagToFile( &servermet, utf8strOptBOM );
 777                                 CTagString( ST_VERSION, server->GetVersion() ).WriteTagToFile( &servermet );
 778                         }
 779                         CTagInt32( ST_UDPFLAGS,   server->GetUDPFlags()      ).WriteTagToFile( &servermet );
 780                         CTagInt32( ST_LOWIDUSERS, server->GetLowIDUsers()    ).WriteTagToFile( &servermet );
 781
 782                         if (server->GetServerKeyUDP(true)) {
 783                                 CTagInt32(ST_UDPKEY, server->GetServerKeyUDP(true)).WriteTagToFile( &servermet );
 784                         }
 785
 786                         if (server->GetServerKeyUDPIP()) {
 787                                 CTagInt32(ST_UDPKEYIP, server->GetServerKeyUDPIP()).WriteTagToFile( &servermet );
 788                         }
 789
 790                         if (server->GetObfuscationPortTCP()) {
 791                                 CTagInt16(ST_TCPPORTOBFUSCATION, server->GetObfuscationPortTCP()).WriteTagToFile( &servermet );
 792                         }
 793
 794                         if (server->GetObfuscationPortUDP()) {
 795                                 CTagInt16(ST_UDPPORTOBFUSCATION, server->GetObfuscationPortUDP()).WriteTagToFile( &servermet );
 796                         }
 797
 798                 }
 799                 // Now server.met.new is ready to be closed and renamed to server.met.
 800                 // But first rename existing server.met to server.met.bak (replacing old .bak file).
 801                 const CPath oldservermet = CPath(theApp->ConfigDir + wxT("server.met.bak"));
 802                 if (curservermet.FileExists()) {
 803                         CPath::RenameFile(curservermet, oldservermet, true);
 804                 }
 805
 806                 servermet.Close();
 807
 808         } catch (const CIOFailureException& e) {
 809                 AddLogLineC(wxT("IO failure while writing 'server.met': ") + e.what());
 810                 return false;
 811         }
 812
 813         return true;
 814 }
 815
 816
 817 void CServerList::RemoveDeadServers()
 818 {
 819         if ( thePrefs::DeadServer() ) {
 820                 for ( CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ) {
 821                         CServer* server = *it++;
 822                         if ( server->GetFailedCount() > thePrefs::GetDeadserverRetries() && !server->IsStaticMember()) {
 823                                 RemoveServer(server);
 824                         }
 825                 }
 826         }
 827 }
 828
 829 void CServerList::UpdateServerMetFromURL(const wxString& strURL)
 830 {
 831         if (strURL.Find(wxT("://")) == -1) {
 832                 AddLogLineC(_("Invalid URL"));
 833                 return;
 834         }
 835         m_URLUpdate = strURL;
 836         wxString strTempFilename(theApp->ConfigDir + wxT("server.met.download"));
 837         CHTTPDownloadThread *downloader = new CHTTPDownloadThread(strURL, strTempFilename, theApp->ConfigDir + wxT("server.met"), HTTP_ServerMet, false, false);
 838         downloader->Create();
 839         downloader->Run();
 840 }
 841
 842
 843 void CServerList::DownloadFinished(uint32 result)
 844 {
 845         if(result == HTTP_Success) {
 846                 const CPath tempFilename = CPath(theApp->ConfigDir + wxT("server.met.download"));
 847
 848                 // curl succeeded. proceed with server.met loading
 849                 LoadServerMet(tempFilename);
 850                 SaveServerMet();
 851
 852                 // So, file is loaded and merged, and also saved
 853                 CPath::RemoveFile(tempFilename);
 854                 AddLogLineN(CFormat(_("Finished downloading the server list from %s")) % m_URLUpdate);
 855         } else if (result == HTTP_Skipped) {
 856                 AddLogLineN(CFormat(_("Skipped download of %s, because requested file is not newer.")) % wxT("server.met"));
 857         } else {
 858                 AddLogLineC(CFormat(_("Failed to download %s from %s")) % wxT("server.met") % m_URLUpdate);
 859         }
 860 }
 861
 862
 863 void CServerList::AutoUpdate()
 864 {
 865
 866         uint8 url_count = theApp->glob_prefs->adresses_list.GetCount();
 867
 868         if (!url_count) {
 869                 AddLogLineC(_("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"));
 870                 return;
 871         }
 872         // Do current URL. Callback function will take care of the others.
 873         while ( current_url_index < url_count ) {
 874                 wxString URI = theApp->glob_prefs->adresses_list[current_url_index];
 875                 // We use wxURL to validate the URI
 876                 if ( wxURL( URI ).GetError() == wxURL_NOERR ) {
 877                         // Ok, got a valid URI
 878                         m_URLUpdate = URI;
 879                         wxString strTempFilename =
 880                                 theApp->ConfigDir + wxT("server_auto.met");
 881                         AddLogLineC(CFormat(
 882                                 _("Start downloading server list from %s")) % URI);
 883                         CHTTPDownloadThread *downloader = new CHTTPDownloadThread(
 884                                 URI, strTempFilename, theApp->ConfigDir + wxT("server.met"), HTTP_ServerMetAuto, false, false);
 885                         downloader->Create();
 886                         downloader->Run();
 887
 888                         return;
 889                 } else {
 890                         AddLogLineC(CFormat(
 891                                 _("WARNING: invalid URL specified for auto-updating of servers: %s") ) % URI);
 892                 }
 893                 current_url_index++;
 894         }
 895         AddLogLineC(_("No valid server.met auto-download url on addresses.dat"));
 896 }
 897
 898
 899 void CServerList::AutoDownloadFinished(uint32 result)
 900 {
 901         if (result == HTTP_Success) {
 902                 CPath tempFilename = CPath(theApp->ConfigDir + wxT("server_auto.met"));
 903
 904                 // curl succeeded. proceed with server.met loading
 905                 LoadServerMet(tempFilename);
 906                 SaveServerMet();
 907
 908                 // So, file is loaded and merged, and also saved
 909                 CPath::RemoveFile(tempFilename);
 910         } else {
 911                 AddLogLineC(CFormat(_("Failed to download the server list from %s") ) % m_URLUpdate);
 912         }
 913
 914         ++current_url_index;
 915
 916         if (current_url_index < theApp->glob_prefs->adresses_list.GetCount()) {
 917                 // Next!
 918                 AutoUpdate();
 919         }
 920 }
 921
 922
 923 void CServerList::ObserverAdded( ObserverType* o )
 924 {
 925         CObservableQueue<CServer*>::ObserverAdded( o );
 926
 927         EventType::ValueList ilist;
 928         ilist.reserve( m_servers.size() );
 929         ilist.assign( m_servers.begin(), m_servers.end() );
 930
 931         NotifyObservers( EventType( EventType::INITIAL, &ilist ), o );
 932 }
 933
 934
 935 uint32 CServerList::GetAvgFile() const
 936 {
 937         //Since there is no real way to know how many files are in the kad network,
 938         //I figure to try to use the ED2K network stats to find how many files the
 939         //average user shares..
 940         uint32 totaluser = 0;
 941         uint32 totalfile = 0;
 942         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 943                 const CServer* const curr = *it;
 944                 //If this server has reported Users/Files and doesn't limit it's files too much
 945                 //use this in the calculation..
 946                 if( curr->GetUsers() && curr->GetFiles() && curr->GetSoftFiles() > 1000 ) {
 947                         totaluser += curr->GetUsers();
 948                         totalfile += curr->GetFiles();
 949                 }
 950         }
 951         //If the user count is a little low, don't send back a average..
 952         //I added 50 to the count as many servers do not allow a large amount of files to be shared..
 953         //Therefore the estimate here will be lower then the actual.
 954         //I would love to add a way for the client to send some statistics back so we could see the real
 955         //values here..
 956         if ( totaluser > 500000 ) {
 957                 return (totalfile/totaluser)+50;
 958         } else {
 959                 return 0;
 960         }
 961 }
 962
 963
 964 std::vector<const CServer*> CServerList::CopySnapshot() const
 965 {
 966         std::vector<const CServer*> result;
 967         result.reserve(m_servers.size());
 968         result.assign(m_servers.begin(), m_servers.end());
 969         return result;
 970 }
 971
 972
 973 void CServerList::FilterServers()
 974 {
 975         CInternalList::iterator it = m_servers.begin();
 976         while (it != m_servers.end()) {
 977                 CServer* server = *it++;
 978
 979                 if (server->HasDynIP()) {
 980                         continue;
 981                 }
 982
 983                 if (theApp->ipfilter->IsFiltered(server->GetIP(), true)) {
 984                         if (server == theApp->serverconnect->GetCurrentServer()) {
 985                                 AddLogLineC(_("Local server is filtered by the IPFilters, reconnecting to a different server!"));
 986                                 theApp->serverconnect->Disconnect();
 987                                 RemoveServer(server);
 988                                 theApp->serverconnect->ConnectToAnyServer();
 989                         } else {
 990                                 RemoveServer(server);
 991                         }
 992                 }
 993         }
 994 }
 995
 996 void CServerList::CheckForExpiredUDPKeys() {
 997
 998         if (!thePrefs::IsServerCryptLayerUDPEnabled()) {
 999                 return;
1000         }
1001
1002         uint32 cKeysTotal = 0;
1003         uint32 cKeysExpired = 0;
1004         uint32 cPingDelayed = 0;
1005         const uint32 dwIP = theApp->GetPublicIP();
1006         const uint32 tNow = ::GetTickCount();
1007         wxASSERT( dwIP != 0 );
1008
1009         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
1010         CServer* pServer = *it;
1011                 if (pServer->SupportsObfuscationUDP() && pServer->GetServerKeyUDP(true) != 0 && pServer->GetServerKeyUDPIP() != dwIP){
1012                         cKeysTotal++;
1013                         cKeysExpired++;
1014                         if (tNow - pServer->GetRealLastPingedTime() < UDPSERVSTATMINREASKTIME){
1015                                 cPingDelayed++;
1016                                 // next ping: Now + (MinimumDelay - already elapsed time)
1017                                 pServer->SetLastPingedTime((tNow - (uint32)UDPSERVSTATREASKTIME) + (UDPSERVSTATMINREASKTIME - (tNow - pServer->GetRealLastPingedTime())));
1018                         } else {
1019                                 pServer->SetLastPingedTime(0);
1020                         }
1021                 } else if (pServer->SupportsObfuscationUDP() && pServer->GetServerKeyUDP(false) != 0) {
1022                         cKeysTotal++;
1023                 }
1024         }
1025 }
1026 // File_checked_for_headers