X-Git-Url: https://git.novaco.in/?p=novacoin.git;a=blobdiff_plain;f=src%2Fnet.h;h=f071ac734936a9ce48be27a3dcca19c3c79d66bb;hp=056077fcdfda081a94c9e24fec7fce92986be672;hb=1c1980bccd1bcccdb03c69ebbe03ad51e08f343a;hpb=c648b589bec6494551d300b335af88d6b194cf82 diff --git a/src/net.h b/src/net.h index 056077f..f071ac7 100644 --- a/src/net.h +++ b/src/net.h @@ -1,454 +1,84 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto +// Copyright (c) 2009-2012 The Bitcoin developers // Distributed under the MIT/X11 software license, see the accompanying -// file license.txt or http://www.opensource.org/licenses/mit-license.php. +// file COPYING or http://www.opensource.org/licenses/mit-license.php. #ifndef BITCOIN_NET_H #define BITCOIN_NET_H +#include #include +#ifndef Q_MOC_RUN #include #include +#endif #include -#ifndef __WXMSW__ +#ifndef WIN32 #include #endif -class CMessageHeader; -class CAddress; -class CAddrDB; -class CInv; +#include "mruset.h" +#include "netbase.h" +#include "addrman.h" +#include "hash.h" + class CRequestTracker; class CNode; class CBlockIndex; extern int nBestHeight; -extern int nConnectTimeout; - - - -inline unsigned int ReceiveBufferSize() { return 1000*GetArg("-maxreceivebuffer", 10*1000); } -inline unsigned int SendBufferSize() { return 1000*GetArg("-maxsendbuffer", 10*1000); } -inline unsigned short GetDefaultPort() { return fTestNet ? 18333 : 8333; } -static const unsigned int PUBLISH_HOPS = 5; -enum -{ - NODE_NETWORK = (1 << 0), -}; +const uint16_t nSocksDefault = 9050; +const uint16_t nPortZero = 0; +inline uint64_t ReceiveBufferSize() { return 1000*GetArg("-maxreceivebuffer", 5*1000); } +inline uint64_t SendBufferSize() { return 1000*GetArg("-maxsendbuffer", 1*1000); } -bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout=nConnectTimeout); -bool Lookup(const char *pszName, std::vector& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false); -bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup = false, int portDefault = 0, bool fAllowPort = false); -bool GetMyExternalIP(unsigned int& ipRet); -bool AddAddress(CAddress addr, int64 nTimePenalty=0, CAddrDB *pAddrDB=NULL); -void AddressCurrentlyConnected(const CAddress& addr); -CNode* FindNode(unsigned int ip); -CNode* ConnectNode(CAddress addrConnect, int64 nTimeout=0); -void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1); -bool AnySubscribed(unsigned int nChannel); -void MapPort(bool fMapPort); -void DNSAddressSeed(); -bool BindListenPort(std::string& strError=REF(std::string())); +void AddOneShot(std::string strDest); +bool RecvLine(SOCKET hSocket, std::string& strLine); +bool GetMyExternalIP(CNetAddr& ipRet); +void AddressCurrentlyConnected(const CService& addr); +CNode* FindNode(const CNetAddr& ip); +CNode* FindNode(const CService& ip); +CNode* ConnectNode(CAddress addrConnect, const char *strDest = NULL, int64_t nTimeout=0); +bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound = NULL, const char *strDest = NULL, bool fOneShot = false); +void MapPort(); +unsigned short GetListenPort(); +bool BindListenPort(const CService &bindAddr, std::string& strError=REF(std::string())); void StartNode(void* parg); bool StopNode(); - - - - - - - -// -// Message header -// (4) message start -// (12) command -// (4) size -// (4) checksum - -extern unsigned char pchMessageStart[4]; - -class CMessageHeader -{ -public: - enum { COMMAND_SIZE=12 }; - char pchMessageStart[sizeof(::pchMessageStart)]; - char pchCommand[COMMAND_SIZE]; - unsigned int nMessageSize; - unsigned int nChecksum; - - CMessageHeader() - { - memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)); - memset(pchCommand, 0, sizeof(pchCommand)); - pchCommand[1] = 1; - nMessageSize = -1; - nChecksum = 0; - } - - CMessageHeader(const char* pszCommand, unsigned int nMessageSizeIn) - { - memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)); - strncpy(pchCommand, pszCommand, COMMAND_SIZE); - nMessageSize = nMessageSizeIn; - nChecksum = 0; - } - - IMPLEMENT_SERIALIZE - ( - READWRITE(FLATDATA(pchMessageStart)); - READWRITE(FLATDATA(pchCommand)); - READWRITE(nMessageSize); - if (nVersion >= 209) - READWRITE(nChecksum); - ) - - std::string GetCommand() - { - if (pchCommand[COMMAND_SIZE-1] == 0) - return std::string(pchCommand, pchCommand + strlen(pchCommand)); - else - return std::string(pchCommand, pchCommand + COMMAND_SIZE); - } - - bool IsValid() - { - // Check start string - if (memcmp(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)) != 0) - return false; - - // Check the command string for errors - for (char* p1 = pchCommand; p1 < pchCommand + COMMAND_SIZE; p1++) - { - if (*p1 == 0) - { - // Must be all zeros after the first zero - for (; p1 < pchCommand + COMMAND_SIZE; p1++) - if (*p1 != 0) - return false; - } - else if (*p1 < ' ' || *p1 > 0x7E) - return false; - } - - // Message size - if (nMessageSize > MAX_SIZE) - { - printf("CMessageHeader::IsValid() : (%s, %u bytes) nMessageSize > MAX_SIZE\n", GetCommand().c_str(), nMessageSize); - return false; - } - - return true; - } -}; - - - - - - -static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff }; - -class CAddress +enum { -public: - uint64 nServices; - unsigned char pchReserved[12]; - unsigned int ip; - unsigned short port; - - // disk and network only - unsigned int nTime; - - // memory only - unsigned int nLastTry; - - CAddress() - { - Init(); - } - - CAddress(unsigned int ipIn, unsigned short portIn=0, uint64 nServicesIn=NODE_NETWORK) - { - Init(); - ip = ipIn; - port = htons(portIn == 0 ? GetDefaultPort() : portIn); - nServices = nServicesIn; - } - - explicit CAddress(const struct sockaddr_in& sockaddr, uint64 nServicesIn=NODE_NETWORK) - { - Init(); - ip = sockaddr.sin_addr.s_addr; - port = sockaddr.sin_port; - nServices = nServicesIn; - } - - explicit CAddress(const char* pszIn, int portIn, bool fNameLookup = false, uint64 nServicesIn=NODE_NETWORK) - { - Init(); - Lookup(pszIn, *this, nServicesIn, fNameLookup, portIn); - } - - explicit CAddress(const char* pszIn, bool fNameLookup = false, uint64 nServicesIn=NODE_NETWORK) - { - Init(); - Lookup(pszIn, *this, nServicesIn, fNameLookup, 0, true); - } - - explicit CAddress(std::string strIn, int portIn, bool fNameLookup = false, uint64 nServicesIn=NODE_NETWORK) - { - Init(); - Lookup(strIn.c_str(), *this, nServicesIn, fNameLookup, portIn); - } - - explicit CAddress(std::string strIn, bool fNameLookup = false, uint64 nServicesIn=NODE_NETWORK) - { - Init(); - Lookup(strIn.c_str(), *this, nServicesIn, fNameLookup, 0, true); - } - - void Init() - { - nServices = NODE_NETWORK; - memcpy(pchReserved, pchIPv4, sizeof(pchReserved)); - ip = INADDR_NONE; - port = htons(GetDefaultPort()); - nTime = 100000000; - nLastTry = 0; - } - - IMPLEMENT_SERIALIZE - ( - if (fRead) - const_cast(this)->Init(); - if (nType & SER_DISK) - READWRITE(nVersion); - if ((nType & SER_DISK) || (nVersion >= 31402 && !(nType & SER_GETHASH))) - READWRITE(nTime); - READWRITE(nServices); - READWRITE(FLATDATA(pchReserved)); // for IPv6 - READWRITE(ip); - READWRITE(port); - ) - - friend inline bool operator==(const CAddress& a, const CAddress& b) - { - return (memcmp(a.pchReserved, b.pchReserved, sizeof(a.pchReserved)) == 0 && - a.ip == b.ip && - a.port == b.port); - } - - friend inline bool operator!=(const CAddress& a, const CAddress& b) - { - return (!(a == b)); - } - - friend inline bool operator<(const CAddress& a, const CAddress& b) - { - int ret = memcmp(a.pchReserved, b.pchReserved, sizeof(a.pchReserved)); - if (ret < 0) - return true; - else if (ret == 0) - { - if (ntohl(a.ip) < ntohl(b.ip)) - return true; - else if (a.ip == b.ip) - return ntohs(a.port) < ntohs(b.port); - } - return false; - } - - std::vector GetKey() const - { - CDataStream ss; - ss.reserve(18); - ss << FLATDATA(pchReserved) << ip << port; - - #if defined(_MSC_VER) && _MSC_VER < 1300 - return std::vector((unsigned char*)&ss.begin()[0], (unsigned char*)&ss.end()[0]); - #else - return std::vector(ss.begin(), ss.end()); - #endif - } - - struct sockaddr_in GetSockAddr() const - { - struct sockaddr_in sockaddr; - memset(&sockaddr, 0, sizeof(sockaddr)); - sockaddr.sin_family = AF_INET; - sockaddr.sin_addr.s_addr = ip; - sockaddr.sin_port = port; - return sockaddr; - } - - bool IsIPv4() const - { - return (memcmp(pchReserved, pchIPv4, sizeof(pchIPv4)) == 0); - } - - bool IsRFC1918() const - { - return IsIPv4() && (GetByte(3) == 10 || - (GetByte(3) == 192 && GetByte(2) == 168) || - (GetByte(3) == 172 && - (GetByte(2) >= 16 && GetByte(2) <= 31))); - } - - bool IsRFC3927() const - { - return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254); - } - - bool IsLocal() const - { - return IsIPv4() && (GetByte(3) == 127 || - GetByte(3) == 0); - } - - bool IsRoutable() const - { - return IsValid() && - !(IsRFC1918() || IsRFC3927() || IsLocal()); - } - - bool IsValid() const - { - // Clean up 3-byte shifted addresses caused by garbage in size field - // of addr messages from versions before 0.2.9 checksum. - // Two consecutive addr messages look like this: - // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26... - // so if the first length field is garbled, it reads the second batch - // of addr misaligned by 3 bytes. - if (memcmp(pchReserved, pchIPv4+3, sizeof(pchIPv4)-3) == 0) - return false; - - return (ip != 0 && ip != INADDR_NONE && port != htons(USHRT_MAX)); - } - - unsigned char GetByte(int n) const - { - return ((unsigned char*)&ip)[3-n]; - } - - std::string ToStringIPPort() const - { - return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port)); - } - - std::string ToStringIP() const - { - return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0)); - } - - std::string ToStringPort() const - { - return strprintf("%u", ntohs(port)); - } - - std::string ToString() const - { - return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port)); - } - - void print() const - { - printf("CAddress(%s)\n", ToString().c_str()); - } + LOCAL_NONE, // unknown + LOCAL_IF, // address a local interface listens on + LOCAL_BIND, // address explicit bound to + LOCAL_IRC, // address reported by IRC (deprecated) + LOCAL_HTTP, // address reported by whatismyip.com and similar + LOCAL_MANUAL, // address explicitly specified (-externalip=) + + LOCAL_MAX }; - - - - +void SetLimited(enum Network net, bool fLimited = true); +bool IsLimited(enum Network net); +bool IsLimited(const CNetAddr& addr); +bool AddLocal(const CService& addr, int nScore = LOCAL_NONE); +bool AddLocal(const CNetAddr& addr, int nScore = LOCAL_NONE); +bool SeenLocal(const CService& addr); +bool IsLocal(const CService& addr); +bool GetLocal(CService &addr, const CNetAddr *paddrPeer = NULL); +bool IsReachable(const CNetAddr &addr); +void SetReachable(enum Network net, bool fFlag = true); +CAddress GetLocalAddress(const CNetAddr *paddrPeer = NULL); enum { MSG_TX = 1, - MSG_BLOCK, + MSG_BLOCK }; -static const char* ppszTypeName[] = -{ - "ERROR", - "tx", - "block", -}; - -class CInv -{ -public: - int type; - uint256 hash; - - CInv() - { - type = 0; - hash = 0; - } - - CInv(int typeIn, const uint256& hashIn) - { - type = typeIn; - hash = hashIn; - } - - CInv(const std::string& strType, const uint256& hashIn) - { - int i; - for (i = 1; i < ARRAYLEN(ppszTypeName); i++) - { - if (strType == ppszTypeName[i]) - { - type = i; - break; - } - } - if (i == ARRAYLEN(ppszTypeName)) - throw std::out_of_range(strprintf("CInv::CInv(string, uint256) : unknown type '%s'", strType.c_str())); - hash = hashIn; - } - - IMPLEMENT_SERIALIZE - ( - READWRITE(type); - READWRITE(hash); - ) - - friend inline bool operator<(const CInv& a, const CInv& b) - { - return (a.type < b.type || (a.type == b.type && a.hash < b.hash)); - } - - bool IsKnownType() const - { - return (type >= 1 && type < ARRAYLEN(ppszTypeName)); - } - - const char* GetCommand() const - { - if (!IsKnownType()) - throw std::out_of_range(strprintf("CInv::GetCommand() : type=%d unknown type", type)); - return ppszTypeName[type]; - } - - std::string ToString() const - { - return strprintf("%s %s", GetCommand(), hash.ToString().substr(0,20).c_str()); - } - - void print() const - { - printf("CInv(%s)\n", ToString().c_str()); - } -}; - - - - - class CRequestTracker { public: @@ -468,110 +98,148 @@ public: }; - - +/** Thread types */ +enum threadId +{ + THREAD_SOCKETHANDLER, + THREAD_OPENCONNECTIONS, + THREAD_MESSAGEHANDLER, + THREAD_RPCLISTENER, + THREAD_DNSSEED, + THREAD_ADDEDCONNECTIONS, + THREAD_DUMPADDRESS, + THREAD_RPCHANDLER, + THREAD_MINTER, + THREAD_SCRIPTCHECK, + THREAD_NTP, + THREAD_IPCOLLECTOR, + + THREAD_MAX +}; extern bool fClient; -extern bool fAllowDNS; -extern uint64 nLocalServices; -extern CAddress addrLocalHost; -extern CNode* pnodeLocalHost; -extern uint64 nLocalHostNonce; -extern boost::array vnThreadsRunning; -extern SOCKET hListenSocket; +extern bool fDiscover; +extern uint64_t nLocalServices; +extern uint64_t nLocalHostNonce; +extern CAddress addrSeenByPeer; +extern boost::array vnThreadsRunning; +extern CAddrMan addrman; extern std::vector vNodes; extern CCriticalSection cs_vNodes; -extern std::map, CAddress> mapAddresses; -extern CCriticalSection cs_mapAddresses; +extern std::vector vAddedNodes; +extern CCriticalSection cs_vAddedNodes; extern std::map mapRelay; -extern std::deque > vRelayExpiration; +extern std::deque > vRelayExpiration; extern CCriticalSection cs_mapRelay; -extern std::map mapAlreadyAskedFor; +extern std::map mapAlreadyAskedFor; -// Settings -extern int fUseProxy; -extern CAddress addrProxy; +class CNodeStats +{ +public: + uint64_t nServices; + int64_t nLastSend; + int64_t nLastRecv; + int64_t nTimeConnected; + std::string addrName; + int32_t nVersion; + std::string strSubVer; + bool fInbound; + int64_t nReleaseTime; + int32_t nStartingHeight; + int32_t nMisbehavior; + uint64_t nSendBytes; + uint64_t nRecvBytes; + bool fSyncNode; +}; + + +/** Information about a peer */ class CNode { public: // socket - uint64 nServices; + uint64_t nServices; SOCKET hSocket; CDataStream vSend; CDataStream vRecv; + uint64_t nSendBytes; + uint64_t nRecvBytes; CCriticalSection cs_vSend; CCriticalSection cs_vRecv; - int64 nLastSend; - int64 nLastRecv; - int64 nLastSendEmpty; - int64 nTimeConnected; - unsigned int nHeaderStart; - unsigned int nMessageStart; + int64_t nLastSend; + int64_t nLastRecv; + int64_t nLastSendEmpty; + int64_t nTimeConnected; + int32_t nHeaderStart; + uint32_t nMessageStart; CAddress addr; - int nVersion; + std::string addrName; + CService addrLocal; + int32_t nVersion; std::string strSubVer; + bool fOneShot; bool fClient; bool fInbound; bool fNetworkNode; bool fSuccessfullyConnected; bool fDisconnect; + CSemaphoreGrant grantOutbound; protected: int nRefCount; + + // Denial-of-service detection/prevention + // Key is IP address, value is banned-until-time + static std::map setBanned; + static CCriticalSection cs_setBanned; + int nMisbehavior; + public: - int64 nReleaseTime; + int64_t nReleaseTime; std::map mapRequests; CCriticalSection cs_mapRequests; uint256 hashContinue; CBlockIndex* pindexLastGetBlocksBegin; uint256 hashLastGetBlocksEnd; - int nStartingHeight; + int32_t nStartingHeight; + bool fStartSync; // flood relay std::vector vAddrToSend; std::set setAddrKnown; bool fGetAddr; std::set setKnown; + uint256 hashCheckpointKnown; // ppcoin: known sent sync-checkpoint // inventory based relay - std::set setInventoryKnown; + mruset setInventoryKnown; std::vector vInventoryToSend; CCriticalSection cs_inventory; - std::multimap mapAskFor; - - // publish and subscription - std::vector vfSubscribe; + std::multimap mapAskFor; - - CNode(SOCKET hSocketIn, CAddress addrIn, bool fInboundIn=false) + CNode(SOCKET hSocketIn, CAddress addrIn, std::string addrNameIn = "", bool fInboundIn=false) : vSend(SER_NETWORK, MIN_PROTO_VERSION), vRecv(SER_NETWORK, MIN_PROTO_VERSION) { nServices = 0; hSocket = hSocketIn; - vSend.SetType(SER_NETWORK); - vSend.SetVersion(0); - vRecv.SetType(SER_NETWORK); - vRecv.SetVersion(0); - // Version 0.2 obsoletes 20 Feb 2012 - if (GetTime() > 1329696000) - { - vSend.SetVersion(209); - vRecv.SetVersion(209); - } nLastSend = 0; nLastRecv = 0; + nSendBytes = 0; + nRecvBytes = 0; nLastSendEmpty = GetTime(); nTimeConnected = GetTime(); nHeaderStart = -1; - nMessageStart = -1; + nMessageStart = std::numeric_limits::max(); addr = addrIn; + addrName = addrNameIn.empty() ? addr.ToStringIPPort() : addrNameIn; nVersion = 0; - strSubVer = ""; + strSubVer.clear(); + fOneShot = false; fClient = false; // set by version message fInbound = fInboundIn; fNetworkNode = false; @@ -583,11 +251,14 @@ public: pindexLastGetBlocksBegin = 0; hashLastGetBlocksEnd = 0; nStartingHeight = -1; + fStartSync = false; fGetAddr = false; - vfSubscribe.assign(256, false); + nMisbehavior = 0; + hashCheckpointKnown = 0; + setInventoryKnown.max_size((size_t)SendBufferSize() / 1000); // Be shy and don't send version until we hear - if (!fInbound) + if (hSocket != INVALID_SOCKET && !fInbound) PushVersion(); } @@ -595,12 +266,17 @@ public: { if (hSocket != INVALID_SOCKET) { - closesocket(hSocket); - hSocket = INVALID_SOCKET; + CloseSocket(hSocket); } } + private: + // Network usage totals + static CCriticalSection cs_totalBytesRecv; + static CCriticalSection cs_totalBytesSent; + static uint64_t nTotalBytesRecv; + static uint64_t nTotalBytesSent; CNode(const CNode&); void operator=(const CNode&); public: @@ -611,7 +287,7 @@ public: return std::max(nRefCount, 0) + (GetTime() < nReleaseTime ? 1 : 0); } - CNode* AddRef(int64 nTimeout=0) + CNode* AddRef(int64_t nTimeout=0) { if (nTimeout != 0) nReleaseTime = std::max(nReleaseTime, GetTime() + nTimeout); @@ -644,28 +320,35 @@ public: void AddInventoryKnown(const CInv& inv) { - CRITICAL_BLOCK(cs_inventory) + { + LOCK(cs_inventory); setInventoryKnown.insert(inv); + } } void PushInventory(const CInv& inv) { - CRITICAL_BLOCK(cs_inventory) + { + LOCK(cs_inventory); if (!setInventoryKnown.count(inv)) vInventoryToSend.push_back(inv); + } } void AskFor(const CInv& inv) { // We're using mapAskFor as a priority queue, // the key is the earliest time the request can be sent - int64& nRequestTime = mapAlreadyAskedFor[inv]; - printf("askfor %s %"PRI64d"\n", inv.ToString().c_str(), nRequestTime); + int64_t& nRequestTime = mapAlreadyAskedFor[inv]; + if (fDebugNet) + printf("askfor %s %" PRId64 " (%s)\n", inv.ToString().c_str(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000).c_str()); // Make sure not to reuse time indexes to keep things in the same order - int64 nNow = (GetTime() - 1) * 1000000; - static int64 nLastTime; - nLastTime = nNow = std::max(nNow, ++nLastTime); + int64_t nNow = (GetTime() - 1) * 1000000; + static int64_t nLastTime; + ++nLastTime; + nNow = std::max(nNow, nLastTime); + nLastTime = nNow; // Each retry is 2 minutes after the last nRequestTime = std::max(nRequestTime + 2 * 60 * 1000000, nNow); @@ -676,26 +359,27 @@ public: void BeginMessage(const char* pszCommand) { - cs_vSend.Enter(); + ENTER_CRITICAL_SECTION(cs_vSend); if (nHeaderStart != -1) AbortMessage(); - nHeaderStart = vSend.size(); + nHeaderStart = (int32_t)vSend.size(); vSend << CMessageHeader(pszCommand, 0); - nMessageStart = vSend.size(); + nMessageStart = (uint32_t)vSend.size(); if (fDebug) - printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str()); - printf("sending: %s ", pszCommand); + printf("sending: %s ", pszCommand); } void AbortMessage() { - if (nHeaderStart == -1) + if (nHeaderStart < 0) return; vSend.resize(nHeaderStart); nHeaderStart = -1; - nMessageStart = -1; - cs_vSend.Leave(); - printf("(aborted)\n"); + nMessageStart = std::numeric_limits::max(); + LEAVE_CRITICAL_SECTION(cs_vSend); + + if (fDebug) + printf("(aborted)\n"); } void EndMessage() @@ -707,36 +391,34 @@ public: return; } - if (nHeaderStart == -1) + if (nHeaderStart < 0) return; // Set the size - unsigned int nSize = vSend.size() - nMessageStart; - memcpy((char*)&vSend[nHeaderStart] + offsetof(CMessageHeader, nMessageSize), &nSize, sizeof(nSize)); + uint32_t nSize = (uint32_t) vSend.size() - nMessageStart; + memcpy((char*)&vSend[nHeaderStart] + CMessageHeader::MESSAGE_SIZE_OFFSET, &nSize, sizeof(nSize)); // Set the checksum - if (vSend.GetVersion() >= 209) - { - uint256 hash = Hash(vSend.begin() + nMessageStart, vSend.end()); - unsigned int nChecksum = 0; - memcpy(&nChecksum, &hash, sizeof(nChecksum)); - assert(nMessageStart - nHeaderStart >= offsetof(CMessageHeader, nChecksum) + sizeof(nChecksum)); - memcpy((char*)&vSend[nHeaderStart] + offsetof(CMessageHeader, nChecksum), &nChecksum, sizeof(nChecksum)); + uint256 hash = Hash(vSend.begin() + nMessageStart, vSend.end()); + uint32_t nChecksum = 0; + memcpy(&nChecksum, &hash, sizeof(nChecksum)); + assert(nMessageStart - nHeaderStart >= CMessageHeader::CHECKSUM_OFFSET + sizeof(nChecksum)); + memcpy((char*)&vSend[nHeaderStart] + CMessageHeader::CHECKSUM_OFFSET, &nChecksum, sizeof(nChecksum)); + + if (fDebug) { + printf("(%d bytes)\n", nSize); } - printf("(%d bytes) ", nSize); - printf("\n"); - nHeaderStart = -1; - nMessageStart = -1; - cs_vSend.Leave(); + nMessageStart = std::numeric_limits::max(); + LEAVE_CRITICAL_SECTION(cs_vSend); } void EndMessageAbortIfEmpty() { - if (nHeaderStart == -1) + if (nHeaderStart < 0) return; - int nSize = vSend.size() - nMessageStart; + int nSize = (int) vSend.size() - nMessageStart; if (nSize > 0) EndMessage(); else @@ -745,18 +427,7 @@ public: - void PushVersion() - { - /// when NTP implemented, change to just nTime = GetAdjustedTime() - int64 nTime = (fInbound ? GetAdjustedTime() : GetTime()); - CAddress addrYou = (fUseProxy ? CAddress("0.0.0.0") : addr); - CAddress addrMe = (fUseProxy ? CAddress("0.0.0.0") : addrLocalHost); - RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce)); - PushMessage("version", VERSION, nLocalServices, nTime, addrYou, addrMe, - nLocalHostNonce, std::string(pszSubVer), nBestHeight); - } - - + void PushVersion(); void PushMessage(const char* pszCommand) @@ -924,8 +595,10 @@ public: uint256 hashReply; RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply)); - CRITICAL_BLOCK(cs_mapRequests) + { + LOCK(cs_mapRequests); mapRequests[hashReply] = CRequestTracker(fn, param1); + } PushMessage(pszCommand, hashReply); } @@ -937,8 +610,10 @@ public: uint256 hashReply; RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply)); - CRITICAL_BLOCK(cs_mapRequests) + { + LOCK(cs_mapRequests); mapRequests[hashReply] = CRequestTracker(fn, param1); + } PushMessage(pszCommand, hashReply, a1); } @@ -950,8 +625,10 @@ public: uint256 hashReply; RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply)); - CRITICAL_BLOCK(cs_mapRequests) + { + LOCK(cs_mapRequests); mapRequests[hashReply] = CRequestTracker(fn, param1); + } PushMessage(pszCommand, hashReply, a1, a2); } @@ -964,107 +641,47 @@ public: void CancelSubscribe(unsigned int nChannel); void CloseSocketDisconnect(); void Cleanup(); -}; - - - - - - - + // Denial-of-service detection/prevention + // The idea is to detect peers that are behaving + // badly and disconnect/ban them, but do it in a + // one-coding-mistake-won't-shatter-the-entire-network + // way. + // IMPORTANT: There should be nothing I can give a + // node that it will forward on that will make that + // node's peers drop it. If there is, an attacker + // can isolate a node and/or try to split the network. + // Dropping a node for sending stuff that is invalid + // now but might be valid in a later version is also + // dangerous, because it can cause a network split + // between nodes running old code and nodes running + // new code. + static void ClearBanned(); // needed for unit testing + static bool IsBanned(CNetAddr ip); + bool Misbehaving(int howmuch); // 1 == a little, 100 == a lot + void copyStats(CNodeStats &stats); + // Network stats + static void RecordBytesRecv(uint64_t bytes); + static void RecordBytesSent(uint64_t bytes); + + static uint64_t GetTotalBytesRecv(); + static uint64_t GetTotalBytesSent(); +}; inline void RelayInventory(const CInv& inv) { // Put on lists to offer to the other nodes - CRITICAL_BLOCK(cs_vNodes) + { + LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) pnode->PushInventory(inv); -} - -template -void RelayMessage(const CInv& inv, const T& a) -{ - CDataStream ss(SER_NETWORK); - ss.reserve(10000); - ss << a; - RelayMessage(inv, ss); -} - -template<> -inline void RelayMessage<>(const CInv& inv, const CDataStream& ss) -{ - CRITICAL_BLOCK(cs_mapRelay) - { - // Expire old relay messages - while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime()) - { - mapRelay.erase(vRelayExpiration.front().second); - vRelayExpiration.pop_front(); - } - - // Save original serialized message so newer versions are preserved - mapRelay[inv] = ss; - vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv)); } - - RelayInventory(inv); } +class CTransaction; +void RelayTransaction(const CTransaction& tx, const uint256& hash); +void RelayTransaction(const CTransaction& tx, const uint256& hash, const CDataStream& ss); - - - - - -// -// Templates for the publish and subscription system. -// The object being published as T& obj needs to have: -// a set setSources member -// specializations of AdvertInsert and AdvertErase -// Currently implemented for CTable and CProduct. -// - -template -void AdvertStartPublish(CNode* pfrom, unsigned int nChannel, unsigned int nHops, T& obj) -{ - // Add to sources - obj.setSources.insert(pfrom->addr.ip); - - if (!AdvertInsert(obj)) - return; - - // Relay - CRITICAL_BLOCK(cs_vNodes) - BOOST_FOREACH(CNode* pnode, vNodes) - if (pnode != pfrom && (nHops < PUBLISH_HOPS || pnode->IsSubscribed(nChannel))) - pnode->PushMessage("publish", nChannel, nHops, obj); -} - -template -void AdvertStopPublish(CNode* pfrom, unsigned int nChannel, unsigned int nHops, T& obj) -{ - uint256 hash = obj.GetHash(); - - CRITICAL_BLOCK(cs_vNodes) - BOOST_FOREACH(CNode* pnode, vNodes) - if (pnode != pfrom && (nHops < PUBLISH_HOPS || pnode->IsSubscribed(nChannel))) - pnode->PushMessage("pub-cancel", nChannel, nHops, hash); - - AdvertErase(obj); -} - -template -void AdvertRemoveSource(CNode* pfrom, unsigned int nChannel, unsigned int nHops, T& obj) -{ - // Remove a source - obj.setSources.erase(pfrom->addr.ip); - - // If no longer supported by any sources, cancel it - if (obj.setSources.empty()) - AdvertStopPublish(pfrom, nChannel, nHops, obj); -} - #endif