diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/init.cpp | 8 | ||||
| -rw-r--r-- | src/net.cpp | 43 | ||||
| -rw-r--r-- | src/net.h | 6 | ||||
| -rw-r--r-- | src/net_processing.cpp | 10 |
4 files changed, 52 insertions, 15 deletions
diff --git a/src/init.cpp b/src/init.cpp index 716c06cd3a..ee3c169c63 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -519,6 +519,7 @@ void SetupServerArgs(NodeContext& node) argsman.AddArg("-limitdescendantcount=<n>", strprintf("Do not accept transactions if any ancestor would have <n> or more in-mempool descendants (default: %u)", DEFAULT_DESCENDANT_LIMIT), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::DEBUG_TEST); argsman.AddArg("-limitdescendantsize=<n>", strprintf("Do not accept transactions if any ancestor would have more than <n> kilobytes of in-mempool descendants (default: %u).", DEFAULT_DESCENDANT_SIZE_LIMIT), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::DEBUG_TEST); argsman.AddArg("-addrmantest", "Allows to test address relay on localhost", ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::DEBUG_TEST); + argsman.AddArg("-capturemessages", "Capture all P2P messages to disk", ArgsManager::ALLOW_BOOL | ArgsManager::DEBUG_ONLY, OptionsCategory::DEBUG_TEST); argsman.AddArg("-debug=<category>", "Output debugging information (default: -nodebug, supplying <category> is optional). " "If <category> is not supplied or if <category> = 1, output all debugging information. <category> can be: " + LogInstance().LogCategoriesString() + ".", ArgsManager::ALLOW_ANY, OptionsCategory::DEBUG_TEST); @@ -1040,16 +1041,17 @@ bool AppInitParameterInteraction(const ArgsManager& args) // Trim requested connection counts, to fit into system limitations // <int> in std::min<int>(...) to work around FreeBSD compilation issue described in #2695 - nFD = RaiseFileDescriptorLimit(nMaxConnections + MIN_CORE_FILEDESCRIPTORS + MAX_ADDNODE_CONNECTIONS + nBind); + nFD = RaiseFileDescriptorLimit(nMaxConnections + MIN_CORE_FILEDESCRIPTORS + MAX_ADDNODE_CONNECTIONS + nBind + NUM_FDS_MESSAGE_CAPTURE); + #ifdef USE_POLL int fd_max = nFD; #else int fd_max = FD_SETSIZE; #endif - nMaxConnections = std::max(std::min<int>(nMaxConnections, fd_max - nBind - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS), 0); + nMaxConnections = std::max(std::min<int>(nMaxConnections, fd_max - nBind - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS - NUM_FDS_MESSAGE_CAPTURE), 0); if (nFD < MIN_CORE_FILEDESCRIPTORS) return InitError(_("Not enough file descriptors available.")); - nMaxConnections = std::min(nFD - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS, nMaxConnections); + nMaxConnections = std::min(nFD - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS - NUM_FDS_MESSAGE_CAPTURE, nMaxConnections); if (nMaxConnections < nUserMaxConnections) InitWarning(strprintf(_("Reducing -maxconnections from %d to %d, because of system limitations."), nUserMaxConnections, nMaxConnections)); diff --git a/src/net.cpp b/src/net.cpp index 76bf7effa4..d004aace88 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -2879,6 +2879,9 @@ void CConnman::PushMessage(CNode* pnode, CSerializedNetMsg&& msg) { size_t nMessageSize = msg.data.size(); LogPrint(BCLog::NET, "sending %s (%d bytes) peer=%d\n", SanitizeString(msg.m_type), nMessageSize, pnode->GetId()); + if (gArgs.GetBoolArg("-capturemessages", false)) { + CaptureMessage(pnode->addr, msg.m_type, msg.data, /* incoming */ false); + } // make sure we use the appropriate network transport format std::vector<unsigned char> serializedHeader; @@ -2894,18 +2897,14 @@ void CConnman::PushMessage(CNode* pnode, CSerializedNetMsg&& msg) pnode->mapSendBytesPerMsgCmd[msg.m_type] += nTotalSize; pnode->nSendSize += nTotalSize; - if (pnode->nSendSize > nSendBufferMaxSize) - pnode->fPauseSend = true; + if (pnode->nSendSize > nSendBufferMaxSize) pnode->fPauseSend = true; pnode->vSendMsg.push_back(std::move(serializedHeader)); - if (nMessageSize) - pnode->vSendMsg.push_back(std::move(msg.data)); + if (nMessageSize) pnode->vSendMsg.push_back(std::move(msg.data)); // If write queue empty, attempt "optimistic write" - if (optimisticSend == true) - nBytesSent = SocketSendData(*pnode); + if (optimisticSend) nBytesSent = SocketSendData(*pnode); } - if (nBytesSent) - RecordBytesSent(nBytesSent); + if (nBytesSent) RecordBytesSent(nBytesSent); } bool CConnman::ForNode(NodeId id, std::function<bool(CNode* pnode)> func) @@ -2948,3 +2947,31 @@ uint64_t CConnman::CalculateKeyedNetGroup(const CAddress& ad) const return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(vchNetGroup.data(), vchNetGroup.size()).Finalize(); } + +void CaptureMessage(const CAddress& addr, const std::string& msg_type, const Span<const unsigned char>& data, bool is_incoming) +{ + // Note: This function captures the message at the time of processing, + // not at socket receive/send time. + // This ensures that the messages are always in order from an application + // layer (processing) perspective. + auto now = GetTime<std::chrono::microseconds>(); + + // Windows folder names can not include a colon + std::string clean_addr = addr.ToString(); + std::replace(clean_addr.begin(), clean_addr.end(), ':', '_'); + + fs::path base_path = GetDataDir() / "message_capture" / clean_addr; + fs::create_directories(base_path); + + fs::path path = base_path / (is_incoming ? "msgs_recv.dat" : "msgs_sent.dat"); + CAutoFile f(fsbridge::fopen(path, "ab"), SER_DISK, CLIENT_VERSION); + + ser_writedata64(f, now.count()); + f.write(msg_type.data(), msg_type.length()); + for (auto i = msg_type.length(); i < CMessageHeader::COMMAND_SIZE; ++i) { + f << '\0'; + } + uint32_t size = data.size(); + ser_writedata32(f, size); + f.write((const char*)data.data(), data.size()); +} @@ -20,6 +20,7 @@ #include <policy/feerate.h> #include <protocol.h> #include <random.h> +#include <span.h> #include <streams.h> #include <sync.h> #include <threadinterrupt.h> @@ -75,6 +76,8 @@ static constexpr uint64_t DEFAULT_MAX_UPLOAD_TARGET = 0; static const bool DEFAULT_BLOCKSONLY = false; /** -peertimeout default */ static const int64_t DEFAULT_PEER_CONNECT_TIMEOUT = 60; +/** Number of file descriptors required for message capture **/ +static const int NUM_FDS_MESSAGE_CAPTURE = 1; static const bool DEFAULT_FORCEDNSSEED = false; static const size_t DEFAULT_MAXRECEIVEBUFFER = 5 * 1000; @@ -1241,6 +1244,9 @@ inline std::chrono::microseconds PoissonNextSend(std::chrono::microseconds now, return std::chrono::microseconds{PoissonNextSend(now.count(), average_interval.count())}; } +/** Dump binary message to file, with timestamp */ +void CaptureMessage(const CAddress& addr, const std::string& msg_type, const Span<const unsigned char>& data, bool is_incoming); + struct NodeEvictionCandidate { NodeId id; diff --git a/src/net_processing.cpp b/src/net_processing.cpp index b68453759a..2dffbd7620 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -4045,14 +4045,12 @@ bool PeerManagerImpl::ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt } // Don't bother if send buffer is too full to respond anyway - if (pfrom->fPauseSend) - return false; + if (pfrom->fPauseSend) return false; std::list<CNetMessage> msgs; { LOCK(pfrom->cs_vProcessMsg); - if (pfrom->vProcessMsg.empty()) - return false; + if (pfrom->vProcessMsg.empty()) return false; // Just take one message msgs.splice(msgs.begin(), pfrom->vProcessMsg, pfrom->vProcessMsg.begin()); pfrom->nProcessQueueSize -= msgs.front().m_raw_message_size; @@ -4061,6 +4059,10 @@ bool PeerManagerImpl::ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt } CNetMessage& msg(msgs.front()); + if (gArgs.GetBoolArg("-capturemessages", false)) { + CaptureMessage(pfrom->addr, msg.m_command, MakeUCharSpan(msg.m_recv), /* incoming */ true); + } + msg.SetVersion(pfrom->GetCommonVersion()); const std::string& msg_type = msg.m_command; |