raw
genesis                 1 // Copyright (c) 2009-2010 Satoshi Nakamoto
genesis 2 // Copyright (c) 2009-2012 The Bitcoin developers
genesis 3 // Distributed under the MIT/X11 software license, see the accompanying
genesis 4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
genesis 5 #ifndef BITCOIN_NET_H
genesis 6 #define BITCOIN_NET_H
genesis 7
genesis 8 #include <deque>
genesis 9 #include <boost/array.hpp>
genesis 10 #include <boost/foreach.hpp>
genesis 11 #include <openssl/rand.h>
genesis 12
genesis 13 #include "protocol.h"
genesis 14
genesis 15 class CAddrDB;
genesis 16 class CRequestTracker;
genesis 17 class CNode;
genesis 18 class CBlockIndex;
genesis 19 extern int nBestHeight;
genesis 20 extern int nConnectTimeout;
genesis 21
genesis 22
genesis 23
genesis 24 inline unsigned int ReceiveBufferSize() { return 1000*GetArg("-maxreceivebuffer", 10*1000); }
genesis 25 inline unsigned int SendBufferSize() { return 1000*GetArg("-maxsendbuffer", 10*1000); }
genesis 26 static const unsigned int PUBLISH_HOPS = 5;
genesis 27
genesis 28 bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout=nConnectTimeout);
asciilifeform_dns... 29 bool Lookup(const char *pszName, std::vector<CAddress>& vaddr, int nServices, int nMaxSolutions, int portDefault = 0, bool fAllowPort = false);
asciilifeform_dns... 30 bool Lookup(const char *pszName, CAddress& addr, int nServices, int portDefault = 0, bool fAllowPort = false);
genesis 31 bool AddAddress(CAddress addr, int64 nTimePenalty=0, CAddrDB *pAddrDB=NULL);
genesis 32 void AddressCurrentlyConnected(const CAddress& addr);
genesis 33 CNode* FindNode(unsigned int ip);
genesis 34 CNode* ConnectNode(CAddress addrConnect, int64 nTimeout=0);
genesis 35 void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1);
genesis 36 bool AnySubscribed(unsigned int nChannel);
genesis 37 void MapPort(bool fMapPort);
genesis 38 bool BindListenPort(std::string& strError=REF(std::string()));
genesis 39 void StartNode(void* parg);
genesis 40 bool StopNode();
genesis 41
genesis 42 enum
genesis 43 {
genesis 44 MSG_TX = 1,
genesis 45 MSG_BLOCK,
genesis 46 };
genesis 47
genesis 48 class CRequestTracker
genesis 49 {
genesis 50 public:
genesis 51 void (*fn)(void*, CDataStream&);
genesis 52 void* param1;
genesis 53
genesis 54 explicit CRequestTracker(void (*fnIn)(void*, CDataStream&)=NULL, void* param1In=NULL)
genesis 55 {
genesis 56 fn = fnIn;
genesis 57 param1 = param1In;
genesis 58 }
genesis 59
genesis 60 bool IsNull()
genesis 61 {
genesis 62 return fn == NULL;
genesis 63 }
genesis 64 };
genesis 65
genesis 66
genesis 67
genesis 68
genesis 69
genesis 70 extern bool fClient;
genesis 71 extern bool fAllowDNS;
genesis 72 extern uint64 nLocalServices;
genesis 73 extern CAddress addrLocalHost;
genesis 74 extern uint64 nLocalHostNonce;
genesis 75 extern boost::array<int, 10> vnThreadsRunning;
genesis 76
genesis 77 extern std::vector<CNode*> vNodes;
genesis 78 extern CCriticalSection cs_vNodes;
genesis 79 extern std::map<std::vector<unsigned char>, CAddress> mapAddresses;
genesis 80 extern CCriticalSection cs_mapAddresses;
genesis 81 extern std::map<CInv, CDataStream> mapRelay;
genesis 82 extern std::deque<std::pair<int64, CInv> > vRelayExpiration;
genesis 83 extern CCriticalSection cs_mapRelay;
genesis 84 extern std::map<CInv, int64> mapAlreadyAskedFor;
genesis 85
genesis 86 // Settings
genesis 87 extern int fUseProxy;
genesis 88 extern CAddress addrProxy;
genesis 89
genesis 90
genesis 91
genesis 92
genesis 93
genesis 94
genesis 95 class CNode
genesis 96 {
genesis 97 public:
genesis 98 // socket
genesis 99 uint64 nServices;
genesis 100 SOCKET hSocket;
genesis 101 CDataStream vSend;
genesis 102 CDataStream vRecv;
genesis 103 CCriticalSection cs_vSend;
genesis 104 CCriticalSection cs_vRecv;
genesis 105 int64 nLastSend;
genesis 106 int64 nLastRecv;
genesis 107 int64 nLastSendEmpty;
genesis 108 int64 nTimeConnected;
genesis 109 unsigned int nHeaderStart;
genesis 110 unsigned int nMessageStart;
genesis 111 CAddress addr;
genesis 112 int nVersion;
genesis 113 std::string strSubVer;
genesis 114 bool fClient;
genesis 115 bool fInbound;
genesis 116 bool fNetworkNode;
genesis 117 bool fSuccessfullyConnected;
genesis 118 bool fDisconnect;
genesis 119 protected:
genesis 120 int nRefCount;
genesis 121
genesis 122 // Denial-of-service detection/prevention
genesis 123 // Key is ip address, value is banned-until-time
genesis 124 static std::map<unsigned int, int64> setBanned;
genesis 125 static CCriticalSection cs_setBanned;
genesis 126 int nMisbehavior;
genesis 127
genesis 128 public:
genesis 129 int64 nReleaseTime;
genesis 130 std::map<uint256, CRequestTracker> mapRequests;
genesis 131 CCriticalSection cs_mapRequests;
genesis 132 uint256 hashContinue;
genesis 133 CBlockIndex* pindexLastGetBlocksBegin;
genesis 134 uint256 hashLastGetBlocksEnd;
genesis 135 int nStartingHeight;
genesis 136
genesis 137 // flood relay
genesis 138 std::vector<CAddress> vAddrToSend;
genesis 139 std::set<CAddress> setAddrKnown;
genesis 140 bool fGetAddr;
genesis 141 std::set<uint256> setKnown;
genesis 142
genesis 143 // inventory based relay
genesis 144 std::set<CInv> setInventoryKnown;
genesis 145 std::vector<CInv> vInventoryToSend;
genesis 146 CCriticalSection cs_inventory;
genesis 147 std::multimap<int64, CInv> mapAskFor;
genesis 148
genesis 149 // publish and subscription
genesis 150 std::vector<char> vfSubscribe;
genesis 151
genesis 152 CNode(SOCKET hSocketIn, CAddress addrIn, bool fInboundIn=false)
genesis 153 {
genesis 154 nServices = 0;
genesis 155 hSocket = hSocketIn;
genesis 156 vSend.SetType(SER_NETWORK);
genesis 157 vSend.SetVersion(0);
genesis 158 vRecv.SetType(SER_NETWORK);
genesis 159 vRecv.SetVersion(0);
genesis 160 // Version 0.2 obsoletes 20 Feb 2012
genesis 161 if (GetTime() > 1329696000)
genesis 162 {
genesis 163 vSend.SetVersion(209);
genesis 164 vRecv.SetVersion(209);
genesis 165 }
genesis 166 nLastSend = 0;
genesis 167 nLastRecv = 0;
genesis 168 nLastSendEmpty = GetTime();
genesis 169 nTimeConnected = GetTime();
genesis 170 nHeaderStart = -1;
genesis 171 nMessageStart = -1;
genesis 172 addr = addrIn;
genesis 173 nVersion = 0;
genesis 174 strSubVer = "";
genesis 175 fClient = false; // set by version message
genesis 176 fInbound = fInboundIn;
genesis 177 fNetworkNode = false;
genesis 178 fSuccessfullyConnected = false;
genesis 179 fDisconnect = false;
genesis 180 nRefCount = 0;
genesis 181 nReleaseTime = 0;
genesis 182 hashContinue = 0;
genesis 183 pindexLastGetBlocksBegin = 0;
genesis 184 hashLastGetBlocksEnd = 0;
genesis 185 nStartingHeight = -1;
genesis 186 fGetAddr = false;
genesis 187 vfSubscribe.assign(256, false);
genesis 188 nMisbehavior = 0;
genesis 189
genesis 190 // Be shy and don't send version until we hear
genesis 191 if (!fInbound)
genesis 192 PushVersion();
genesis 193 }
genesis 194
genesis 195 ~CNode()
genesis 196 {
genesis 197 if (hSocket != INVALID_SOCKET)
genesis 198 {
genesis 199 closesocket(hSocket);
genesis 200 hSocket = INVALID_SOCKET;
genesis 201 }
genesis 202 }
genesis 203
genesis 204 private:
genesis 205 CNode(const CNode&);
genesis 206 void operator=(const CNode&);
genesis 207 public:
genesis 208
genesis 209
genesis 210 int GetRefCount()
genesis 211 {
genesis 212 return std::max(nRefCount, 0) + (GetTime() < nReleaseTime ? 1 : 0);
genesis 213 }
genesis 214
genesis 215 CNode* AddRef(int64 nTimeout=0)
genesis 216 {
genesis 217 if (nTimeout != 0)
genesis 218 nReleaseTime = std::max(nReleaseTime, GetTime() + nTimeout);
genesis 219 else
genesis 220 nRefCount++;
genesis 221 return this;
genesis 222 }
genesis 223
genesis 224 void Release()
genesis 225 {
genesis 226 nRefCount--;
genesis 227 }
genesis 228
genesis 229
genesis 230
genesis 231 void AddAddressKnown(const CAddress& addr)
genesis 232 {
genesis 233 setAddrKnown.insert(addr);
genesis 234 }
genesis 235
genesis 236 void PushAddress(const CAddress& addr)
genesis 237 {
genesis 238 // Known checking here is only to save space from duplicates.
genesis 239 // SendMessages will filter it again for knowns that were added
genesis 240 // after addresses were pushed.
genesis 241 if (addr.IsValid() && !setAddrKnown.count(addr))
genesis 242 vAddrToSend.push_back(addr);
genesis 243 }
genesis 244
genesis 245
genesis 246 void AddInventoryKnown(const CInv& inv)
genesis 247 {
genesis 248 CRITICAL_BLOCK(cs_inventory)
genesis 249 setInventoryKnown.insert(inv);
genesis 250 }
genesis 251
genesis 252 void PushInventory(const CInv& inv)
genesis 253 {
genesis 254 CRITICAL_BLOCK(cs_inventory)
genesis 255 if (!setInventoryKnown.count(inv))
genesis 256 vInventoryToSend.push_back(inv);
genesis 257 }
genesis 258
genesis 259 void AskFor(const CInv& inv)
genesis 260 {
genesis 261 // We're using mapAskFor as a priority queue,
genesis 262 // the key is the earliest time the request can be sent
genesis 263 int64& nRequestTime = mapAlreadyAskedFor[inv];
genesis 264 printf("askfor %s %"PRI64d"\n", inv.ToString().c_str(), nRequestTime);
genesis 265
genesis 266 // Make sure not to reuse time indexes to keep things in the same order
genesis 267 int64 nNow = (GetTime() - 1) * 1000000;
genesis 268 static int64 nLastTime;
genesis 269 ++nLastTime;
genesis 270 nNow = std::max(nNow, nLastTime);
genesis 271 nLastTime = nNow;
genesis 272
genesis 273 // Each retry is 2 minutes after the last
genesis 274 nRequestTime = std::max(nRequestTime + 2 * 60 * 1000000, nNow);
genesis 275 mapAskFor.insert(std::make_pair(nRequestTime, inv));
genesis 276 }
genesis 277
genesis 278
genesis 279
genesis 280 void BeginMessage(const char* pszCommand)
genesis 281 {
genesis 282 ENTER_CRITICAL_SECTION(cs_vSend);
genesis 283 if (nHeaderStart != -1)
genesis 284 AbortMessage();
genesis 285 nHeaderStart = vSend.size();
genesis 286 vSend << CMessageHeader(pszCommand, 0);
genesis 287 nMessageStart = vSend.size();
genesis 288 if (fDebug) {
genesis 289 printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
genesis 290 printf("sending: %s ", pszCommand);
genesis 291 }
genesis 292 }
genesis 293
genesis 294 void AbortMessage()
genesis 295 {
genesis 296 if (nHeaderStart == -1)
genesis 297 return;
genesis 298 vSend.resize(nHeaderStart);
genesis 299 nHeaderStart = -1;
genesis 300 nMessageStart = -1;
genesis 301 LEAVE_CRITICAL_SECTION(cs_vSend);
genesis 302
genesis 303 if (fDebug)
genesis 304 printf("(aborted)\n");
genesis 305 }
genesis 306
genesis 307 void EndMessage()
genesis 308 {
genesis 309 if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
genesis 310 {
genesis 311 printf("dropmessages DROPPING SEND MESSAGE\n");
genesis 312 AbortMessage();
genesis 313 return;
genesis 314 }
genesis 315
genesis 316 if (nHeaderStart == -1)
genesis 317 return;
genesis 318
genesis 319 // Set the size
genesis 320 unsigned int nSize = vSend.size() - nMessageStart;
genesis 321 memcpy((char*)&vSend[nHeaderStart] + offsetof(CMessageHeader, nMessageSize), &nSize, sizeof(nSize));
genesis 322
genesis 323 // Set the checksum
genesis 324 if (vSend.GetVersion() >= 209)
genesis 325 {
genesis 326 uint256 hash = Hash(vSend.begin() + nMessageStart, vSend.end());
genesis 327 unsigned int nChecksum = 0;
genesis 328 memcpy(&nChecksum, &hash, sizeof(nChecksum));
genesis 329 assert(nMessageStart - nHeaderStart >= offsetof(CMessageHeader, nChecksum) + sizeof(nChecksum));
genesis 330 memcpy((char*)&vSend[nHeaderStart] + offsetof(CMessageHeader, nChecksum), &nChecksum, sizeof(nChecksum));
genesis 331 }
genesis 332
genesis 333 if (fDebug) {
genesis 334 printf("(%d bytes)\n", nSize);
genesis 335 }
genesis 336
genesis 337 nHeaderStart = -1;
genesis 338 nMessageStart = -1;
genesis 339 LEAVE_CRITICAL_SECTION(cs_vSend);
genesis 340 }
genesis 341
genesis 342 void EndMessageAbortIfEmpty()
genesis 343 {
genesis 344 if (nHeaderStart == -1)
genesis 345 return;
genesis 346 int nSize = vSend.size() - nMessageStart;
genesis 347 if (nSize > 0)
genesis 348 EndMessage();
genesis 349 else
genesis 350 AbortMessage();
genesis 351 }
genesis 352
genesis 353
genesis 354
genesis 355 void PushVersion()
genesis 356 {
genesis 357 /// when NTP implemented, change to just nTime = GetAdjustedTime()
genesis 358 int64 nTime = (fInbound ? GetAdjustedTime() : GetTime());
genesis 359 CAddress addrYou = (fUseProxy ? CAddress("0.0.0.0") : addr);
genesis 360 CAddress addrMe = (fUseProxy || !addrLocalHost.IsRoutable() ? CAddress("0.0.0.0") : addrLocalHost);
genesis 361 RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
genesis 362 PushMessage("version", VERSION, nLocalServices, nTime, addrYou, addrMe,
genesis 363 nLocalHostNonce, std::string(pszSubVer), nBestHeight);
genesis 364 }
genesis 365
genesis 366
genesis 367
genesis 368
genesis 369 void PushMessage(const char* pszCommand)
genesis 370 {
genesis 371 try
genesis 372 {
genesis 373 BeginMessage(pszCommand);
genesis 374 EndMessage();
genesis 375 }
genesis 376 catch (...)
genesis 377 {
genesis 378 AbortMessage();
genesis 379 throw;
genesis 380 }
genesis 381 }
genesis 382
genesis 383 template<typename T1>
genesis 384 void PushMessage(const char* pszCommand, const T1& a1)
genesis 385 {
genesis 386 try
genesis 387 {
genesis 388 BeginMessage(pszCommand);
genesis 389 vSend << a1;
genesis 390 EndMessage();
genesis 391 }
genesis 392 catch (...)
genesis 393 {
genesis 394 AbortMessage();
genesis 395 throw;
genesis 396 }
genesis 397 }
genesis 398
genesis 399 template<typename T1, typename T2>
genesis 400 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2)
genesis 401 {
genesis 402 try
genesis 403 {
genesis 404 BeginMessage(pszCommand);
genesis 405 vSend << a1 << a2;
genesis 406 EndMessage();
genesis 407 }
genesis 408 catch (...)
genesis 409 {
genesis 410 AbortMessage();
genesis 411 throw;
genesis 412 }
genesis 413 }
genesis 414
genesis 415 template<typename T1, typename T2, typename T3>
genesis 416 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3)
genesis 417 {
genesis 418 try
genesis 419 {
genesis 420 BeginMessage(pszCommand);
genesis 421 vSend << a1 << a2 << a3;
genesis 422 EndMessage();
genesis 423 }
genesis 424 catch (...)
genesis 425 {
genesis 426 AbortMessage();
genesis 427 throw;
genesis 428 }
genesis 429 }
genesis 430
genesis 431 template<typename T1, typename T2, typename T3, typename T4>
genesis 432 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4)
genesis 433 {
genesis 434 try
genesis 435 {
genesis 436 BeginMessage(pszCommand);
genesis 437 vSend << a1 << a2 << a3 << a4;
genesis 438 EndMessage();
genesis 439 }
genesis 440 catch (...)
genesis 441 {
genesis 442 AbortMessage();
genesis 443 throw;
genesis 444 }
genesis 445 }
genesis 446
genesis 447 template<typename T1, typename T2, typename T3, typename T4, typename T5>
genesis 448 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4, const T5& a5)
genesis 449 {
genesis 450 try
genesis 451 {
genesis 452 BeginMessage(pszCommand);
genesis 453 vSend << a1 << a2 << a3 << a4 << a5;
genesis 454 EndMessage();
genesis 455 }
genesis 456 catch (...)
genesis 457 {
genesis 458 AbortMessage();
genesis 459 throw;
genesis 460 }
genesis 461 }
genesis 462
genesis 463 template<typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
genesis 464 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4, const T5& a5, const T6& a6)
genesis 465 {
genesis 466 try
genesis 467 {
genesis 468 BeginMessage(pszCommand);
genesis 469 vSend << a1 << a2 << a3 << a4 << a5 << a6;
genesis 470 EndMessage();
genesis 471 }
genesis 472 catch (...)
genesis 473 {
genesis 474 AbortMessage();
genesis 475 throw;
genesis 476 }
genesis 477 }
genesis 478
genesis 479 template<typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
genesis 480 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4, const T5& a5, const T6& a6, const T7& a7)
genesis 481 {
genesis 482 try
genesis 483 {
genesis 484 BeginMessage(pszCommand);
genesis 485 vSend << a1 << a2 << a3 << a4 << a5 << a6 << a7;
genesis 486 EndMessage();
genesis 487 }
genesis 488 catch (...)
genesis 489 {
genesis 490 AbortMessage();
genesis 491 throw;
genesis 492 }
genesis 493 }
genesis 494
genesis 495 template<typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8>
genesis 496 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4, const T5& a5, const T6& a6, const T7& a7, const T8& a8)
genesis 497 {
genesis 498 try
genesis 499 {
genesis 500 BeginMessage(pszCommand);
genesis 501 vSend << a1 << a2 << a3 << a4 << a5 << a6 << a7 << a8;
genesis 502 EndMessage();
genesis 503 }
genesis 504 catch (...)
genesis 505 {
genesis 506 AbortMessage();
genesis 507 throw;
genesis 508 }
genesis 509 }
genesis 510
genesis 511 template<typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9>
genesis 512 void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4, const T5& a5, const T6& a6, const T7& a7, const T8& a8, const T9& a9)
genesis 513 {
genesis 514 try
genesis 515 {
genesis 516 BeginMessage(pszCommand);
genesis 517 vSend << a1 << a2 << a3 << a4 << a5 << a6 << a7 << a8 << a9;
genesis 518 EndMessage();
genesis 519 }
genesis 520 catch (...)
genesis 521 {
genesis 522 AbortMessage();
genesis 523 throw;
genesis 524 }
genesis 525 }
genesis 526
genesis 527
genesis 528 void PushRequest(const char* pszCommand,
genesis 529 void (*fn)(void*, CDataStream&), void* param1)
genesis 530 {
genesis 531 uint256 hashReply;
genesis 532 RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply));
genesis 533
genesis 534 CRITICAL_BLOCK(cs_mapRequests)
genesis 535 mapRequests[hashReply] = CRequestTracker(fn, param1);
genesis 536
genesis 537 PushMessage(pszCommand, hashReply);
genesis 538 }
genesis 539
genesis 540 template<typename T1>
genesis 541 void PushRequest(const char* pszCommand, const T1& a1,
genesis 542 void (*fn)(void*, CDataStream&), void* param1)
genesis 543 {
genesis 544 uint256 hashReply;
genesis 545 RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply));
genesis 546
genesis 547 CRITICAL_BLOCK(cs_mapRequests)
genesis 548 mapRequests[hashReply] = CRequestTracker(fn, param1);
genesis 549
genesis 550 PushMessage(pszCommand, hashReply, a1);
genesis 551 }
genesis 552
genesis 553 template<typename T1, typename T2>
genesis 554 void PushRequest(const char* pszCommand, const T1& a1, const T2& a2,
genesis 555 void (*fn)(void*, CDataStream&), void* param1)
genesis 556 {
genesis 557 uint256 hashReply;
genesis 558 RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply));
genesis 559
genesis 560 CRITICAL_BLOCK(cs_mapRequests)
genesis 561 mapRequests[hashReply] = CRequestTracker(fn, param1);
genesis 562
genesis 563 PushMessage(pszCommand, hashReply, a1, a2);
genesis 564 }
genesis 565
genesis 566
genesis 567
genesis 568 void PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd);
genesis 569 bool IsSubscribed(unsigned int nChannel);
genesis 570 void Subscribe(unsigned int nChannel, unsigned int nHops=0);
genesis 571 void CancelSubscribe(unsigned int nChannel);
genesis 572 void CloseSocketDisconnect();
genesis 573 void Cleanup();
genesis 574
genesis 575
genesis 576 // Denial-of-service detection/prevention
genesis 577 // The idea is to detect peers that are behaving
genesis 578 // badly and disconnect/ban them, but do it in a
genesis 579 // one-coding-mistake-won't-shatter-the-entire-network
genesis 580 // way.
genesis 581 // IMPORTANT: There should be nothing I can give a
genesis 582 // node that it will forward on that will make that
genesis 583 // node's peers drop it. If there is, an attacker
genesis 584 // can isolate a node and/or try to split the network.
genesis 585 // Dropping a node for sending stuff that is invalid
genesis 586 // now but might be valid in a later version is also
genesis 587 // dangerous, because it can cause a network split
genesis 588 // between nodes running old code and nodes running
genesis 589 // new code.
genesis 590 static void ClearBanned(); // needed for unit testing
genesis 591 static bool IsBanned(unsigned int ip);
genesis 592 bool Misbehaving(int howmuch); // 1 == a little, 100 == a lot
genesis 593 };
genesis 594
genesis 595
genesis 596
genesis 597
genesis 598
genesis 599
genesis 600
genesis 601
genesis 602
genesis 603
genesis 604 inline void RelayInventory(const CInv& inv)
genesis 605 {
genesis 606 // Put on lists to offer to the other nodes
genesis 607 CRITICAL_BLOCK(cs_vNodes)
genesis 608 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 609 pnode->PushInventory(inv);
genesis 610 }
genesis 611
genesis 612 template<typename T>
genesis 613 void RelayMessage(const CInv& inv, const T& a)
genesis 614 {
genesis 615 CDataStream ss(SER_NETWORK);
genesis 616 ss.reserve(10000);
genesis 617 ss << a;
genesis 618 RelayMessage(inv, ss);
genesis 619 }
genesis 620
genesis 621 template<>
genesis 622 inline void RelayMessage<>(const CInv& inv, const CDataStream& ss)
genesis 623 {
genesis 624 CRITICAL_BLOCK(cs_mapRelay)
genesis 625 {
genesis 626 // Expire old relay messages
genesis 627 while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime())
genesis 628 {
genesis 629 mapRelay.erase(vRelayExpiration.front().second);
genesis 630 vRelayExpiration.pop_front();
genesis 631 }
genesis 632
genesis 633 // Save original serialized message so newer versions are preserved
genesis 634 mapRelay[inv] = ss;
genesis 635 vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv));
genesis 636 }
genesis 637
genesis 638 RelayInventory(inv);
genesis 639 }
genesis 640
genesis 641
genesis 642
genesis 643
genesis 644
genesis 645
genesis 646
genesis 647
genesis 648 //
genesis 649 // Templates for the publish and subscription system.
genesis 650 // The object being published as T& obj needs to have:
genesis 651 // a set<unsigned int> setSources member
genesis 652 // specializations of AdvertInsert and AdvertErase
genesis 653 // Currently implemented for CTable and CProduct.
genesis 654 //
genesis 655
genesis 656 template<typename T>
genesis 657 void AdvertStartPublish(CNode* pfrom, unsigned int nChannel, unsigned int nHops, T& obj)
genesis 658 {
genesis 659 // Add to sources
genesis 660 obj.setSources.insert(pfrom->addr.ip);
genesis 661
genesis 662 if (!AdvertInsert(obj))
genesis 663 return;
genesis 664
genesis 665 // Relay
genesis 666 CRITICAL_BLOCK(cs_vNodes)
genesis 667 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 668 if (pnode != pfrom && (nHops < PUBLISH_HOPS || pnode->IsSubscribed(nChannel)))
genesis 669 pnode->PushMessage("publish", nChannel, nHops, obj);
genesis 670 }
genesis 671
genesis 672 template<typename T>
genesis 673 void AdvertStopPublish(CNode* pfrom, unsigned int nChannel, unsigned int nHops, T& obj)
genesis 674 {
genesis 675 uint256 hash = obj.GetHash();
genesis 676
genesis 677 CRITICAL_BLOCK(cs_vNodes)
genesis 678 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 679 if (pnode != pfrom && (nHops < PUBLISH_HOPS || pnode->IsSubscribed(nChannel)))
genesis 680 pnode->PushMessage("pub-cancel", nChannel, nHops, hash);
genesis 681
genesis 682 AdvertErase(obj);
genesis 683 }
genesis 684
genesis 685 template<typename T>
genesis 686 void AdvertRemoveSource(CNode* pfrom, unsigned int nChannel, unsigned int nHops, T& obj)
genesis 687 {
genesis 688 // Remove a source
genesis 689 obj.setSources.erase(pfrom->addr.ip);
genesis 690
genesis 691 // If no longer supported by any sources, cancel it
genesis 692 if (obj.setSources.empty())
genesis 693 AdvertStopPublish(pfrom, nChannel, nHops, obj);
genesis 694 }
genesis 695
genesis 696 #endif