diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/net.cpp | 491 | ||||
-rw-r--r-- | src/net.h | 5 |
2 files changed, 257 insertions, 239 deletions
diff --git a/src/net.cpp b/src/net.cpp index f83f39a67d..c8d3efceed 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -1153,310 +1153,322 @@ void CConnman::AcceptConnection(const ListenSocket& hListenSocket) { } } -void CConnman::ThreadSocketHandler() +void CConnman::DisconnectNodes() { - unsigned int nPrevNodeCount = 0; - while (!interruptNet) { - // - // Disconnect nodes - // - { - LOCK(cs_vNodes); + LOCK(cs_vNodes); - if (!fNetworkActive) { - // Disconnect any connected nodes - for (CNode* pnode : vNodes) { - if (!pnode->fDisconnect) { - LogPrint(BCLog::NET, "Network not active, dropping peer=%d\n", pnode->GetId()); - pnode->fDisconnect = true; - } + if (!fNetworkActive) { + // Disconnect any connected nodes + for (CNode* pnode : vNodes) { + if (!pnode->fDisconnect) { + LogPrint(BCLog::NET, "Network not active, dropping peer=%d\n", pnode->GetId()); + pnode->fDisconnect = true; } } + } - // Disconnect unused nodes - std::vector<CNode*> vNodesCopy = vNodes; - for (CNode* pnode : vNodesCopy) + // Disconnect unused nodes + std::vector<CNode*> vNodesCopy = vNodes; + for (CNode* pnode : vNodesCopy) + { + if (pnode->fDisconnect) { - if (pnode->fDisconnect) - { - // remove from vNodes - vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end()); + // remove from vNodes + vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end()); - // release outbound grant (if any) - pnode->grantOutbound.Release(); + // release outbound grant (if any) + pnode->grantOutbound.Release(); - // close socket and cleanup - pnode->CloseSocketDisconnect(); + // close socket and cleanup + pnode->CloseSocketDisconnect(); - // hold in disconnected pool until all refs are released - pnode->Release(); - vNodesDisconnected.push_back(pnode); - } + // hold in disconnected pool until all refs are released + pnode->Release(); + vNodesDisconnected.push_back(pnode); } } + } + { + // Delete disconnected nodes + std::list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected; + for (CNode* pnode : vNodesDisconnectedCopy) { - // Delete disconnected nodes - std::list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected; - for (CNode* pnode : vNodesDisconnectedCopy) - { - // wait until threads are done using it - if (pnode->GetRefCount() <= 0) { - bool fDelete = false; - { - TRY_LOCK(pnode->cs_inventory, lockInv); - if (lockInv) { - TRY_LOCK(pnode->cs_vSend, lockSend); - if (lockSend) { - fDelete = true; - } + // wait until threads are done using it + if (pnode->GetRefCount() <= 0) { + bool fDelete = false; + { + TRY_LOCK(pnode->cs_inventory, lockInv); + if (lockInv) { + TRY_LOCK(pnode->cs_vSend, lockSend); + if (lockSend) { + fDelete = true; } } - if (fDelete) { - vNodesDisconnected.remove(pnode); - DeleteNode(pnode); - } + } + if (fDelete) { + vNodesDisconnected.remove(pnode); + DeleteNode(pnode); } } } - size_t vNodesSize; + } +} + +void CConnman::NotifyNumConnectionsChanged() +{ + size_t vNodesSize; + { + LOCK(cs_vNodes); + vNodesSize = vNodes.size(); + } + if(vNodesSize != nPrevNodeCount) { + nPrevNodeCount = vNodesSize; + if(clientInterface) + clientInterface->NotifyNumConnectionsChanged(vNodesSize); + } +} + +void CConnman::InactivityCheck(CNode *pnode) +{ + int64_t nTime = GetSystemTimeInSeconds(); + if (nTime - pnode->nTimeConnected > 60) + { + if (pnode->nLastRecv == 0 || pnode->nLastSend == 0) + { + LogPrint(BCLog::NET, "socket no message in first 60 seconds, %d %d from %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0, pnode->GetId()); + pnode->fDisconnect = true; + } + else if (nTime - pnode->nLastSend > TIMEOUT_INTERVAL) { - LOCK(cs_vNodes); - vNodesSize = vNodes.size(); + LogPrintf("socket sending timeout: %is\n", nTime - pnode->nLastSend); + pnode->fDisconnect = true; + } + else if (nTime - pnode->nLastRecv > (pnode->nVersion > BIP0031_VERSION ? TIMEOUT_INTERVAL : 90*60)) + { + LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv); + pnode->fDisconnect = true; + } + else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros()) + { + LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart)); + pnode->fDisconnect = true; } - if(vNodesSize != nPrevNodeCount) { - nPrevNodeCount = vNodesSize; - if(clientInterface) - clientInterface->NotifyNumConnectionsChanged(vNodesSize); + else if (!pnode->fSuccessfullyConnected) + { + LogPrint(BCLog::NET, "version handshake timeout from %d\n", pnode->GetId()); + pnode->fDisconnect = true; } + } +} - // - // Find which sockets have data to receive - // - struct timeval timeout; - timeout.tv_sec = 0; - timeout.tv_usec = 50000; // frequency to poll pnode->vSend - - fd_set fdsetRecv; - fd_set fdsetSend; - fd_set fdsetError; - FD_ZERO(&fdsetRecv); - FD_ZERO(&fdsetSend); - FD_ZERO(&fdsetError); - SOCKET hSocketMax = 0; - bool have_fds = false; +void CConnman::SocketHandler() +{ + // + // Find which sockets have data to receive + // + struct timeval timeout; + timeout.tv_sec = 0; + timeout.tv_usec = 50000; // frequency to poll pnode->vSend - for (const ListenSocket& hListenSocket : vhListenSocket) { - FD_SET(hListenSocket.socket, &fdsetRecv); - hSocketMax = std::max(hSocketMax, hListenSocket.socket); - have_fds = true; - } + fd_set fdsetRecv; + fd_set fdsetSend; + fd_set fdsetError; + FD_ZERO(&fdsetRecv); + FD_ZERO(&fdsetSend); + FD_ZERO(&fdsetError); + SOCKET hSocketMax = 0; + bool have_fds = false; + for (const ListenSocket& hListenSocket : vhListenSocket) { + FD_SET(hListenSocket.socket, &fdsetRecv); + hSocketMax = std::max(hSocketMax, hListenSocket.socket); + have_fds = true; + } + + { + LOCK(cs_vNodes); + for (CNode* pnode : vNodes) { - LOCK(cs_vNodes); - for (CNode* pnode : vNodes) + // Implement the following logic: + // * If there is data to send, select() for sending data. As this only + // happens when optimistic write failed, we choose to first drain the + // write buffer in this case before receiving more. This avoids + // needlessly queueing received data, if the remote peer is not themselves + // receiving data. This means properly utilizing TCP flow control signalling. + // * Otherwise, if there is space left in the receive buffer, select() for + // receiving data. + // * Hand off all complete messages to the processor, to be handled without + // blocking here. + + bool select_recv = !pnode->fPauseRecv; + bool select_send; { - // Implement the following logic: - // * If there is data to send, select() for sending data. As this only - // happens when optimistic write failed, we choose to first drain the - // write buffer in this case before receiving more. This avoids - // needlessly queueing received data, if the remote peer is not themselves - // receiving data. This means properly utilizing TCP flow control signalling. - // * Otherwise, if there is space left in the receive buffer, select() for - // receiving data. - // * Hand off all complete messages to the processor, to be handled without - // blocking here. - - bool select_recv = !pnode->fPauseRecv; - bool select_send; - { - LOCK(pnode->cs_vSend); - select_send = !pnode->vSendMsg.empty(); - } + LOCK(pnode->cs_vSend); + select_send = !pnode->vSendMsg.empty(); + } - LOCK(pnode->cs_hSocket); - if (pnode->hSocket == INVALID_SOCKET) - continue; + LOCK(pnode->cs_hSocket); + if (pnode->hSocket == INVALID_SOCKET) + continue; - FD_SET(pnode->hSocket, &fdsetError); - hSocketMax = std::max(hSocketMax, pnode->hSocket); - have_fds = true; + FD_SET(pnode->hSocket, &fdsetError); + hSocketMax = std::max(hSocketMax, pnode->hSocket); + have_fds = true; - if (select_send) { - FD_SET(pnode->hSocket, &fdsetSend); - continue; - } - if (select_recv) { - FD_SET(pnode->hSocket, &fdsetRecv); - } + if (select_send) { + FD_SET(pnode->hSocket, &fdsetSend); + continue; + } + if (select_recv) { + FD_SET(pnode->hSocket, &fdsetRecv); } } + } - int nSelect = select(have_fds ? hSocketMax + 1 : 0, - &fdsetRecv, &fdsetSend, &fdsetError, &timeout); - if (interruptNet) - return; + int nSelect = select(have_fds ? hSocketMax + 1 : 0, + &fdsetRecv, &fdsetSend, &fdsetError, &timeout); + if (interruptNet) + return; - if (nSelect == SOCKET_ERROR) + if (nSelect == SOCKET_ERROR) + { + if (have_fds) { - if (have_fds) - { - int nErr = WSAGetLastError(); - LogPrintf("socket select error %s\n", NetworkErrorString(nErr)); - for (unsigned int i = 0; i <= hSocketMax; i++) - FD_SET(i, &fdsetRecv); - } - FD_ZERO(&fdsetSend); - FD_ZERO(&fdsetError); - if (!interruptNet.sleep_for(std::chrono::milliseconds(timeout.tv_usec/1000))) - return; + int nErr = WSAGetLastError(); + LogPrintf("socket select error %s\n", NetworkErrorString(nErr)); + for (unsigned int i = 0; i <= hSocketMax; i++) + FD_SET(i, &fdsetRecv); } + FD_ZERO(&fdsetSend); + FD_ZERO(&fdsetError); + if (!interruptNet.sleep_for(std::chrono::milliseconds(timeout.tv_usec/1000))) + return; + } - // - // Accept new connections - // - for (const ListenSocket& hListenSocket : vhListenSocket) + // + // Accept new connections + // + for (const ListenSocket& hListenSocket : vhListenSocket) + { + if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv)) { - if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv)) - { - AcceptConnection(hListenSocket); - } + AcceptConnection(hListenSocket); } + } + + // + // Service each socket + // + std::vector<CNode*> vNodesCopy; + { + LOCK(cs_vNodes); + vNodesCopy = vNodes; + for (CNode* pnode : vNodesCopy) + pnode->AddRef(); + } + for (CNode* pnode : vNodesCopy) + { + if (interruptNet) + return; // - // Service each socket + // Receive // - std::vector<CNode*> vNodesCopy; + bool recvSet = false; + bool sendSet = false; + bool errorSet = false; { - LOCK(cs_vNodes); - vNodesCopy = vNodes; - for (CNode* pnode : vNodesCopy) - pnode->AddRef(); + LOCK(pnode->cs_hSocket); + if (pnode->hSocket == INVALID_SOCKET) + continue; + recvSet = FD_ISSET(pnode->hSocket, &fdsetRecv); + sendSet = FD_ISSET(pnode->hSocket, &fdsetSend); + errorSet = FD_ISSET(pnode->hSocket, &fdsetError); } - for (CNode* pnode : vNodesCopy) + if (recvSet || errorSet) { - if (interruptNet) - return; - - // - // Receive - // - bool recvSet = false; - bool sendSet = false; - bool errorSet = false; + // typical socket buffer is 8K-64K + char pchBuf[0x10000]; + int nBytes = 0; { LOCK(pnode->cs_hSocket); if (pnode->hSocket == INVALID_SOCKET) continue; - recvSet = FD_ISSET(pnode->hSocket, &fdsetRecv); - sendSet = FD_ISSET(pnode->hSocket, &fdsetSend); - errorSet = FD_ISSET(pnode->hSocket, &fdsetError); + nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT); } - if (recvSet || errorSet) + if (nBytes > 0) { - // typical socket buffer is 8K-64K - char pchBuf[0x10000]; - int nBytes = 0; - { - LOCK(pnode->cs_hSocket); - if (pnode->hSocket == INVALID_SOCKET) - continue; - nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT); - } - if (nBytes > 0) - { - bool notify = false; - if (!pnode->ReceiveMsgBytes(pchBuf, nBytes, notify)) - pnode->CloseSocketDisconnect(); - RecordBytesRecv(nBytes); - if (notify) { - size_t nSizeAdded = 0; - auto it(pnode->vRecvMsg.begin()); - for (; it != pnode->vRecvMsg.end(); ++it) { - if (!it->complete()) - break; - nSizeAdded += it->vRecv.size() + CMessageHeader::HEADER_SIZE; - } - { - LOCK(pnode->cs_vProcessMsg); - pnode->vProcessMsg.splice(pnode->vProcessMsg.end(), pnode->vRecvMsg, pnode->vRecvMsg.begin(), it); - pnode->nProcessQueueSize += nSizeAdded; - pnode->fPauseRecv = pnode->nProcessQueueSize > nReceiveFloodSize; - } - WakeMessageHandler(); - } - } - else if (nBytes == 0) - { - // socket closed gracefully - if (!pnode->fDisconnect) { - LogPrint(BCLog::NET, "socket closed\n"); - } + bool notify = false; + if (!pnode->ReceiveMsgBytes(pchBuf, nBytes, notify)) pnode->CloseSocketDisconnect(); - } - else if (nBytes < 0) - { - // error - int nErr = WSAGetLastError(); - if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) + RecordBytesRecv(nBytes); + if (notify) { + size_t nSizeAdded = 0; + auto it(pnode->vRecvMsg.begin()); + for (; it != pnode->vRecvMsg.end(); ++it) { + if (!it->complete()) + break; + nSizeAdded += it->vRecv.size() + CMessageHeader::HEADER_SIZE; + } { - if (!pnode->fDisconnect) - LogPrintf("socket recv error %s\n", NetworkErrorString(nErr)); - pnode->CloseSocketDisconnect(); + LOCK(pnode->cs_vProcessMsg); + pnode->vProcessMsg.splice(pnode->vProcessMsg.end(), pnode->vRecvMsg, pnode->vRecvMsg.begin(), it); + pnode->nProcessQueueSize += nSizeAdded; + pnode->fPauseRecv = pnode->nProcessQueueSize > nReceiveFloodSize; } + WakeMessageHandler(); } } - - // - // Send - // - if (sendSet) + else if (nBytes == 0) { - LOCK(pnode->cs_vSend); - size_t nBytes = SocketSendData(pnode); - if (nBytes) { - RecordBytesSent(nBytes); + // socket closed gracefully + if (!pnode->fDisconnect) { + LogPrint(BCLog::NET, "socket closed\n"); } + pnode->CloseSocketDisconnect(); } - - // - // Inactivity checking - // - int64_t nTime = GetSystemTimeInSeconds(); - if (nTime - pnode->nTimeConnected > 60) + else if (nBytes < 0) { - if (pnode->nLastRecv == 0 || pnode->nLastSend == 0) - { - LogPrint(BCLog::NET, "socket no message in first 60 seconds, %d %d from %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0, pnode->GetId()); - pnode->fDisconnect = true; - } - else if (nTime - pnode->nLastSend > TIMEOUT_INTERVAL) - { - LogPrintf("socket sending timeout: %is\n", nTime - pnode->nLastSend); - pnode->fDisconnect = true; - } - else if (nTime - pnode->nLastRecv > (pnode->nVersion > BIP0031_VERSION ? TIMEOUT_INTERVAL : 90*60)) - { - LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv); - pnode->fDisconnect = true; - } - else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros()) - { - LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart)); - pnode->fDisconnect = true; - } - else if (!pnode->fSuccessfullyConnected) + // error + int nErr = WSAGetLastError(); + if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) { - LogPrint(BCLog::NET, "version handshake timeout from %d\n", pnode->GetId()); - pnode->fDisconnect = true; + if (!pnode->fDisconnect) + LogPrintf("socket recv error %s\n", NetworkErrorString(nErr)); + pnode->CloseSocketDisconnect(); } } } + + // + // Send + // + if (sendSet) { - LOCK(cs_vNodes); - for (CNode* pnode : vNodesCopy) - pnode->Release(); + LOCK(pnode->cs_vSend); + size_t nBytes = SocketSendData(pnode); + if (nBytes) { + RecordBytesSent(nBytes); + } } + + InactivityCheck(pnode); + } + { + LOCK(cs_vNodes); + for (CNode* pnode : vNodesCopy) + pnode->Release(); + } +} + +void CConnman::ThreadSocketHandler() +{ + while (!interruptNet) + { + DisconnectNodes(); + NotifyNumConnectionsChanged(); + SocketHandler(); } } @@ -2217,6 +2229,7 @@ CConnman::CConnman(uint64_t nSeed0In, uint64_t nSeed1In) : nSeed0(nSeed0In), nSe setBannedIsDirty = false; fAddressesInitialized = false; nLastNodeId = 0; + nPrevNodeCount = 0; nSendBufferMaxSize = 0; nReceiveFloodSize = 0; flagInterruptMsgProc = false; @@ -338,6 +338,10 @@ private: void ThreadOpenConnections(std::vector<std::string> connect); void ThreadMessageHandler(); void AcceptConnection(const ListenSocket& hListenSocket); + void DisconnectNodes(); + void NotifyNumConnectionsChanged(); + void InactivityCheck(CNode *pnode); + void SocketHandler(); void ThreadSocketHandler(); void ThreadDNSAddressSeed(); @@ -408,6 +412,7 @@ private: std::list<CNode*> vNodesDisconnected; mutable CCriticalSection cs_vNodes; std::atomic<NodeId> nLastNodeId; + unsigned int nPrevNodeCount; /** Services this instance offers */ ServiceFlags nLocalServices; |