From 51d617e70f90a972185917ea0096c1ecef2bfa8b Mon Sep 17 00:00:00 2001 From: Bitflash-sh Date: Fri, 24 Jul 2026 11:18:11 -0300 Subject: Bitflash: fair-launch release Satoshi's bitcoin-0.1.0 reborn with RandomX CPU proof of work, anonymous .btf addressing over Nostr with CGNAT rendezvous, automatic peer discovery, a headless Linux node, and Windows GUI wallet. Fair launch, no premine, 21M cap. --- src/net.h | 863 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 863 insertions(+) create mode 100644 src/net.h (limited to 'src/net.h') diff --git a/src/net.h b/src/net.h new file mode 100644 index 0000000..6e62126 --- /dev/null +++ b/src/net.h @@ -0,0 +1,863 @@ +// Copyright (c) 2009 Satoshi Nakamoto +// Distributed under the MIT/X11 software license, see the accompanying +// file license.txt or http://www.opensource.org/licenses/mit-license.php. + +class CMessageHeader; +class CAddress; +class CInv; +class CRequestTracker; +class CNode; + + + +static const unsigned short DEFAULT_PORT = htons(8433); +static const unsigned int PUBLISH_HOPS = 5; +enum +{ + NODE_NETWORK = (1 << 0), +}; + + + + + + +bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet); +bool GetMyExternalIP(unsigned int& ipRet); +bool AddAddress(CAddrDB& addrdb, const CAddress& addr); +CNode* FindNode(unsigned int ip); +CNode* ConnectNode(CAddress addrConnect, int64 nTimeout=0); +CNode* ConnectNodeBtf(const string& strBtfAddr); +void ThreadBtfAccept(void* parg); +void ThreadBtfConnect(void* parg); +extern string strBtfConnect; +void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1); +bool AnySubscribed(unsigned int nChannel); +void ThreadBitcoinMiner(void* parg); +bool StartNode(string& strError=REF(string())); +bool StopNode(); +void CheckForShutdown(int n); + + + + + + + + + +// +// Message header +// (4) message start +// (12) command +// (4) size + +// The message start string is designed to be unlikely to occur in normal data. +// The characters are rarely used upper ascii, not valid as UTF-8, and produce +// a large 4-byte int at any alignment. +// Magic bytes unique to the Bitflash network (0xbf = "BF"). Second byte bumped +// to 0x20 for the 2026 stable relaunch so the old test chain can't interfere. +static const char pchMessageStart[4] = { 0xbf, 0x20, 0x5c, 0xfd }; + +class CMessageHeader +{ +public: + enum { COMMAND_SIZE=12 }; + char pchMessageStart[sizeof(::pchMessageStart)]; + char pchCommand[COMMAND_SIZE]; + unsigned int nMessageSize; + + CMessageHeader() + { + memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)); + memset(pchCommand, 0, sizeof(pchCommand)); + pchCommand[1] = 1; + nMessageSize = -1; + } + + CMessageHeader(const char* pszCommand, unsigned int nMessageSizeIn) + { + memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)); + strncpy(pchCommand, pszCommand, COMMAND_SIZE); + nMessageSize = nMessageSizeIn; + } + + IMPLEMENT_SERIALIZE + ( + READWRITE(FLATDATA(pchMessageStart)); + READWRITE(FLATDATA(pchCommand)); + READWRITE(nMessageSize); + ) + + string GetCommand() + { + if (pchCommand[COMMAND_SIZE-1] == 0) + return string(pchCommand, pchCommand + strlen(pchCommand)); + else + return 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 > 0x10000000) + { + printf("CMessageHeader::IsValid() : nMessageSize too large %u\n", 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 +{ +public: + uint64 nServices; + unsigned char pchReserved[12]; + unsigned int ip; + unsigned short port; + + // disk only + unsigned int nTime; + + // memory only + unsigned int nLastFailed; + + CAddress() + { + nServices = 0; + memcpy(pchReserved, pchIPv4, sizeof(pchReserved)); + ip = 0; + port = DEFAULT_PORT; + nTime = GetAdjustedTime(); + nLastFailed = 0; + } + + CAddress(unsigned int ipIn, unsigned short portIn, uint64 nServicesIn=0) + { + nServices = nServicesIn; + memcpy(pchReserved, pchIPv4, sizeof(pchReserved)); + ip = ipIn; + port = portIn; + nTime = GetAdjustedTime(); + nLastFailed = 0; + } + + explicit CAddress(const struct sockaddr_in& sockaddr, uint64 nServicesIn=0) + { + nServices = nServicesIn; + memcpy(pchReserved, pchIPv4, sizeof(pchReserved)); + ip = sockaddr.sin_addr.s_addr; + port = sockaddr.sin_port; + nTime = GetAdjustedTime(); + nLastFailed = 0; + } + + explicit CAddress(const char* pszIn, uint64 nServicesIn=0) + { + nServices = nServicesIn; + memcpy(pchReserved, pchIPv4, sizeof(pchReserved)); + ip = 0; + port = DEFAULT_PORT; + nTime = GetAdjustedTime(); + nLastFailed = 0; + + char psz[100]; + if (strlen(pszIn) > ARRAYLEN(psz)-1) + return; + strcpy(psz, pszIn); + unsigned int a, b, c, d, e; + if (sscanf(psz, "%u.%u.%u.%u:%u", &a, &b, &c, &d, &e) < 4) + return; + char* pszPort = strchr(psz, ':'); + if (pszPort) + { + *pszPort++ = '\0'; + port = htons(atoi(pszPort)); + } + ip = inet_addr(psz); + } + + IMPLEMENT_SERIALIZE + ( + if (nType & SER_DISK) + { + READWRITE(nVersion); + READWRITE(nTime); + } + READWRITE(nServices); + READWRITE(FLATDATA(pchReserved)); + 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) + { + 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; + } + + vector GetKey() const + { + CDataStream ss; + ss.reserve(18); + ss << FLATDATA(pchReserved) << ip << port; + + #if defined(_MSC_VER) && _MSC_VER < 1300 + return vector((unsigned char*)&ss.begin()[0], (unsigned char*)&ss.end()[0]); + #else + return vector(ss.begin(), ss.end()); + #endif + } + + struct sockaddr_in GetSockAddr() const + { + struct sockaddr_in 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 IsRoutable() const + { + return !(GetByte(3) == 10 || (GetByte(3) == 192 && GetByte(2) == 168)); + } + + unsigned char GetByte(int n) const + { + return ((unsigned char*)&ip)[3-n]; + } + + string ToStringIPPort() const + { + return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port)); + } + + string ToStringIP() const + { + return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0)); + } + + string ToString() const + { + return strprintf("%u.%u.%u.%u:%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0), ntohs(port)); + //return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0)); + } + + void print() const + { + printf("CAddress(%s)\n", ToString().c_str()); + } +}; + + + + + + + +enum +{ + MSG_TX = 1, + MSG_BLOCK, + MSG_REVIEW, + MSG_PRODUCT, + MSG_TABLE, +}; + +static const char* ppszTypeName[] = +{ + "ERROR", + "tx", + "block", + "review", + "product", + "table", +}; + +class CInv +{ +public: + int type; + uint256 hash; + + CInv() + { + type = 0; + hash = 0; + } + + CInv(int typeIn, const uint256& hashIn) + { + type = typeIn; + hash = hashIn; + } + + CInv(const 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=% unknown type", type)); + return ppszTypeName[type]; + } + + string ToString() const + { + return strprintf("%s %s", GetCommand(), hash.ToString().substr(0,14).c_str()); + } + + void print() const + { + printf("CInv(%s)\n", ToString().c_str()); + } +}; + + + + + +class CRequestTracker +{ +public: + void (*fn)(void*, CDataStream&); + void* param1; + + explicit CRequestTracker(void (*fnIn)(void*, CDataStream&)=NULL, void* param1In=NULL) + { + fn = fnIn; + param1 = param1In; + } + + bool IsNull() + { + return fn == NULL; + } +}; + + + + + +extern bool fClient; +extern uint64 nLocalServices; +extern CAddress addrLocalHost; +extern unsigned short nListenPort; +extern CNode* pnodeLocalHost; +extern bool fShutdown; +extern array vfThreadRunning; +extern vector vNodes; +extern CCriticalSection cs_vNodes; +extern map, CAddress> mapAddresses; +extern CCriticalSection cs_mapAddresses; +extern map mapRelay; +extern deque > vRelayExpiration; +extern CCriticalSection cs_mapRelay; +extern map mapAlreadyAskedFor; +extern CAddress addrProxy; + + + + + +class CNode +{ +public: + // socket + uint64 nServices; + SOCKET hSocket; + CDataStream vSend; + CDataStream vRecv; + CCriticalSection cs_vSend; + CCriticalSection cs_vRecv; + unsigned int nPushPos; + CAddress addr; + int nVersion; + bool fClient; + bool fInbound; + bool fNetworkNode; + bool fDisconnect; +protected: + int nRefCount; +public: + int64 nReleaseTime; + map mapRequests; + CCriticalSection cs_mapRequests; + + // flood + vector vAddrToSend; + set setAddrKnown; + + // inventory based relay + set setInventoryKnown; + set setInventoryKnown2; + vector vInventoryToSend; + CCriticalSection cs_inventory; + multimap mapAskFor; + + // publish and subscription + vector vfSubscribe; + + + CNode(SOCKET hSocketIn, CAddress addrIn, bool fInboundIn=false) + { + nServices = 0; + hSocket = hSocketIn; + vSend.SetType(SER_NETWORK); + vRecv.SetType(SER_NETWORK); + nPushPos = -1; + addr = addrIn; + nVersion = 0; + fClient = false; // set by version message + fInbound = fInboundIn; + fNetworkNode = false; + fDisconnect = false; + nRefCount = 0; + nReleaseTime = 0; + vfSubscribe.assign(256, false); + + // Push a version message + /// when NTP implemented, change to just nTime = GetAdjustedTime() + int64 nTime = (fInbound ? GetAdjustedTime() : GetTime()); + PushMessage("version", VERSION, nLocalServices, nTime, addr); + } + + ~CNode() + { + if (hSocket != INVALID_SOCKET) + closesocket(hSocket); + } + +private: + CNode(const CNode&); + void operator=(const CNode&); +public: + + + bool ReadyToDisconnect() + { + return fDisconnect || GetRefCount() <= 0; + } + + int GetRefCount() + { + return max(nRefCount, 0) + (GetTime() < nReleaseTime ? 1 : 0); + } + + void AddRef(int64 nTimeout=0) + { + if (nTimeout != 0) + nReleaseTime = max(nReleaseTime, GetTime() + nTimeout); + else + nRefCount++; + } + + void Release() + { + nRefCount--; + } + + + + void AddInventoryKnown(const CInv& inv) + { + CRITICAL_BLOCK(cs_inventory) + setInventoryKnown.insert(inv); + } + + void PushInventory(const CInv& inv) + { + CRITICAL_BLOCK(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 %I64d\n", inv.ToString().c_str(), nRequestTime); + + // Make sure not to reuse time indexes to keep things in the same order + int64 nNow = (GetTime() - 1) * 1000000; + static int64 nLastTime; + nLastTime = nNow = max(nNow, ++nLastTime); + + // Each retry is 2 minutes after the last + nRequestTime = max(nRequestTime + 2 * 60 * 1000000, nNow); + mapAskFor.insert(make_pair(nRequestTime, inv)); + } + + + + void BeginMessage(const char* pszCommand) + { + EnterCriticalSection(&cs_vSend); + if (nPushPos != -1) + AbortMessage(); + nPushPos = vSend.size(); + vSend << CMessageHeader(pszCommand, 0); + printf("sending: %-12s ", pszCommand); + } + + void AbortMessage() + { + if (nPushPos == -1) + return; + vSend.resize(nPushPos); + nPushPos = -1; + LeaveCriticalSection(&cs_vSend); + printf("(aborted)\n"); + } + + void EndMessage() + { + extern int nDropMessagesTest; + if (nDropMessagesTest > 0 && GetRand(nDropMessagesTest) == 0) + { + printf("dropmessages DROPPING SEND MESSAGE\n"); + AbortMessage(); + return; + } + + if (nPushPos == -1) + return; + + // Patch in the size + unsigned int nSize = vSend.size() - nPushPos - sizeof(CMessageHeader); + memcpy((char*)&vSend[nPushPos] + offsetof(CMessageHeader, nMessageSize), &nSize, sizeof(nSize)); + + printf("(%d bytes) ", nSize); + //for (int i = nPushPos+sizeof(CMessageHeader); i < min(vSend.size(), nPushPos+sizeof(CMessageHeader)+20U); i++) + // printf("%02x ", vSend[i] & 0xff); + printf("\n"); + + nPushPos = -1; + LeaveCriticalSection(&cs_vSend); + } + + void EndMessageAbortIfEmpty() + { + if (nPushPos == -1) + return; + int nSize = vSend.size() - nPushPos - sizeof(CMessageHeader); + if (nSize > 0) + EndMessage(); + else + AbortMessage(); + } + + const char* GetMessageCommand() const + { + if (nPushPos == -1) + return ""; + return &vSend[nPushPos] + offsetof(CMessageHeader, pchCommand); + } + + + + + void PushMessage(const char* pszCommand) + { + try + { + BeginMessage(pszCommand); + EndMessage(); + } + catch (...) + { + AbortMessage(); + throw; + } + } + + template + void PushMessage(const char* pszCommand, const T1& a1) + { + try + { + BeginMessage(pszCommand); + vSend << a1; + EndMessage(); + } + catch (...) + { + AbortMessage(); + throw; + } + } + + template + void PushMessage(const char* pszCommand, const T1& a1, const T2& a2) + { + try + { + BeginMessage(pszCommand); + vSend << a1 << a2; + EndMessage(); + } + catch (...) + { + AbortMessage(); + throw; + } + } + + template + void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3) + { + try + { + BeginMessage(pszCommand); + vSend << a1 << a2 << a3; + EndMessage(); + } + catch (...) + { + AbortMessage(); + throw; + } + } + + template + void PushMessage(const char* pszCommand, const T1& a1, const T2& a2, const T3& a3, const T4& a4) + { + try + { + BeginMessage(pszCommand); + vSend << a1 << a2 << a3 << a4; + EndMessage(); + } + catch (...) + { + AbortMessage(); + throw; + } + } + + + void PushRequest(const char* pszCommand, + void (*fn)(void*, CDataStream&), void* param1) + { + uint256 hashReply; + RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply)); + + CRITICAL_BLOCK(cs_mapRequests) + mapRequests[hashReply] = CRequestTracker(fn, param1); + + PushMessage(pszCommand, hashReply); + } + + template + void PushRequest(const char* pszCommand, const T1& a1, + void (*fn)(void*, CDataStream&), void* param1) + { + uint256 hashReply; + RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply)); + + CRITICAL_BLOCK(cs_mapRequests) + mapRequests[hashReply] = CRequestTracker(fn, param1); + + PushMessage(pszCommand, hashReply, a1); + } + + template + void PushRequest(const char* pszCommand, const T1& a1, const T2& a2, + void (*fn)(void*, CDataStream&), void* param1) + { + uint256 hashReply; + RAND_bytes((unsigned char*)&hashReply, sizeof(hashReply)); + + CRITICAL_BLOCK(cs_mapRequests) + mapRequests[hashReply] = CRequestTracker(fn, param1); + + PushMessage(pszCommand, hashReply, a1, a2); + } + + + + bool IsSubscribed(unsigned int nChannel); + void Subscribe(unsigned int nChannel, unsigned int nHops=0); + void CancelSubscribe(unsigned int nChannel); + void Disconnect(); +}; + + + + + + + + + + +inline void RelayInventory(const CInv& inv) +{ + // Put on lists to offer to the other nodes + CRITICAL_BLOCK(cs_vNodes) + 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(make_pair(GetTime() + 15 * 60, inv)); + } + + RelayInventory(inv); +} + + + + + + + + +// +// 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) + 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) + 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); +} -- cgit v1.2.3