819 lines
26 KiB
C++
819 lines
26 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2012 The Bitcoin developers
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// Copyright (c) 2011-2012 Litecoin Developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "db.h"
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#include "util.h"
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#include "main.h"
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#include <boost/version.hpp>
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#include <boost/filesystem.hpp>
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#include <boost/filesystem/fstream.hpp>
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#ifndef WIN32
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#include "sys/stat.h"
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#endif
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using namespace std;
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using namespace boost;
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unsigned int nWalletDBUpdated;
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//
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// CDB
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//
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CDBEnv bitdb;
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void CDBEnv::EnvShutdown()
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{
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if (!fDbEnvInit)
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return;
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fDbEnvInit = false;
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try
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{
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dbenv.close(0);
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}
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catch (const DbException& e)
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{
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printf("EnvShutdown exception: %s (%d)\n", e.what(), e.get_errno());
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}
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DbEnv(0).remove(GetDataDir().string().c_str(), 0);
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}
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CDBEnv::CDBEnv() : dbenv(0)
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{
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}
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CDBEnv::~CDBEnv()
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{
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EnvShutdown();
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}
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void CDBEnv::Close()
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{
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EnvShutdown();
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}
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bool CDBEnv::Open(boost::filesystem::path pathEnv_)
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{
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if (fDbEnvInit)
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return true;
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if (fShutdown)
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return false;
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pathEnv = pathEnv_;
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filesystem::path pathDataDir = pathEnv;
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filesystem::path pathLogDir = pathDataDir / "database";
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filesystem::create_directory(pathLogDir);
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filesystem::path pathErrorFile = pathDataDir / "db.log";
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printf("dbenv.open LogDir=%s ErrorFile=%s\n", pathLogDir.string().c_str(), pathErrorFile.string().c_str());
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unsigned int nEnvFlags = 0;
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if (GetBoolArg("-privdb", true))
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nEnvFlags |= DB_PRIVATE;
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int nDbCache = GetArg("-dbcache", 25);
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dbenv.set_lg_dir(pathLogDir.string().c_str());
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dbenv.set_cachesize(nDbCache / 1024, (nDbCache % 1024)*1048576, 1);
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dbenv.set_lg_bsize(1048576);
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dbenv.set_lg_max(10485760);
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dbenv.set_lk_max_locks(537000);
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dbenv.set_lk_max_objects(10000);
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dbenv.set_errfile(fopen(pathErrorFile.string().c_str(), "a")); /// debug
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dbenv.set_flags(DB_AUTO_COMMIT, 1);
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dbenv.set_flags(DB_TXN_WRITE_NOSYNC, 1);
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dbenv.log_set_config(DB_LOG_AUTO_REMOVE, 1);
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int ret = dbenv.open(pathDataDir.string().c_str(),
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DB_CREATE |
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DB_INIT_LOCK |
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DB_INIT_LOG |
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DB_INIT_MPOOL |
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DB_INIT_TXN |
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DB_THREAD |
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DB_RECOVER |
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nEnvFlags,
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S_IRUSR | S_IWUSR);
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if (ret > 0)
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return error("CDB() : error %d opening database environment", ret);
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fDbEnvInit = true;
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return true;
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}
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void CDBEnv::CheckpointLSN(std::string strFile)
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{
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dbenv.txn_checkpoint(0, 0, 0);
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dbenv.lsn_reset(strFile.c_str(), 0);
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}
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CDB::CDB(const char *pszFile, const char* pszMode) :
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pdb(NULL), activeTxn(NULL)
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{
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int ret;
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if (pszFile == NULL)
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return;
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fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
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bool fCreate = strchr(pszMode, 'c');
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unsigned int nFlags = DB_THREAD;
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if (fCreate)
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nFlags |= DB_CREATE;
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{
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LOCK(bitdb.cs_db);
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if (!bitdb.Open(GetDataDir()))
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throw runtime_error("env open failed");
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strFile = pszFile;
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++bitdb.mapFileUseCount[strFile];
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pdb = bitdb.mapDb[strFile];
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if (pdb == NULL)
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{
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pdb = new Db(&bitdb.dbenv, 0);
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ret = pdb->open(NULL, // Txn pointer
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pszFile, // Filename
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"main", // Logical db name
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DB_BTREE, // Database type
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nFlags, // Flags
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0);
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if (ret > 0)
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{
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delete pdb;
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pdb = NULL;
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{
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LOCK(bitdb.cs_db);
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--bitdb.mapFileUseCount[strFile];
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}
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strFile = "";
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throw runtime_error(strprintf("CDB() : can't open database file %s, error %d", pszFile, ret));
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}
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if (fCreate && !Exists(string("version")))
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{
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bool fTmp = fReadOnly;
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fReadOnly = false;
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WriteVersion(CLIENT_VERSION);
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fReadOnly = fTmp;
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}
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bitdb.mapDb[strFile] = pdb;
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}
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}
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}
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static bool IsChainFile(std::string strFile)
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{
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if (strFile == "blkindex.dat")
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return true;
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return false;
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}
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void CDB::Close()
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{
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if (!pdb)
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return;
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if (activeTxn)
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activeTxn->abort();
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activeTxn = NULL;
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pdb = NULL;
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// Flush database activity from memory pool to disk log
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unsigned int nMinutes = 0;
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if (fReadOnly)
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nMinutes = 1;
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if (IsChainFile(strFile))
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nMinutes = 2;
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if (IsChainFile(strFile) && IsInitialBlockDownload())
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nMinutes = 5;
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bitdb.dbenv.txn_checkpoint(nMinutes ? GetArg("-dblogsize", 100)*1024 : 0, nMinutes, 0);
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{
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LOCK(bitdb.cs_db);
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--bitdb.mapFileUseCount[strFile];
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}
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}
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void CDBEnv::CloseDb(const string& strFile)
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{
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{
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LOCK(cs_db);
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if (mapDb[strFile] != NULL)
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{
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// Close the database handle
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Db* pdb = mapDb[strFile];
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pdb->close(0);
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delete pdb;
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mapDb[strFile] = NULL;
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}
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}
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}
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bool CDB::Rewrite(const string& strFile, const char* pszSkip)
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{
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while (!fShutdown)
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{
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{
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LOCK(bitdb.cs_db);
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if (!bitdb.mapFileUseCount.count(strFile) || bitdb.mapFileUseCount[strFile] == 0)
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{
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// Flush log data to the dat file
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bitdb.CloseDb(strFile);
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bitdb.CheckpointLSN(strFile);
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bitdb.mapFileUseCount.erase(strFile);
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bool fSuccess = true;
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printf("Rewriting %s...\n", strFile.c_str());
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string strFileRes = strFile + ".rewrite";
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{ // surround usage of db with extra {}
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CDB db(strFile.c_str(), "r");
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Db* pdbCopy = new Db(&bitdb.dbenv, 0);
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int ret = pdbCopy->open(NULL, // Txn pointer
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strFileRes.c_str(), // Filename
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"main", // Logical db name
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DB_BTREE, // Database type
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DB_CREATE, // Flags
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0);
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if (ret > 0)
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{
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printf("Cannot create database file %s\n", strFileRes.c_str());
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fSuccess = false;
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}
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Dbc* pcursor = db.GetCursor();
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if (pcursor)
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while (fSuccess)
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{
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CDataStream ssKey(SER_DISK, CLIENT_VERSION);
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CDataStream ssValue(SER_DISK, CLIENT_VERSION);
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int ret = db.ReadAtCursor(pcursor, ssKey, ssValue, DB_NEXT);
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if (ret == DB_NOTFOUND)
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{
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pcursor->close();
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break;
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}
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else if (ret != 0)
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{
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pcursor->close();
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fSuccess = false;
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break;
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}
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if (pszSkip &&
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strncmp(&ssKey[0], pszSkip, std::min(ssKey.size(), strlen(pszSkip))) == 0)
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continue;
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if (strncmp(&ssKey[0], "\x07version", 8) == 0)
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{
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// Update version:
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ssValue.clear();
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ssValue << CLIENT_VERSION;
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}
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Dbt datKey(&ssKey[0], ssKey.size());
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Dbt datValue(&ssValue[0], ssValue.size());
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int ret2 = pdbCopy->put(NULL, &datKey, &datValue, DB_NOOVERWRITE);
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if (ret2 > 0)
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fSuccess = false;
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}
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if (fSuccess)
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{
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db.Close();
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bitdb.CloseDb(strFile);
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if (pdbCopy->close(0))
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fSuccess = false;
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delete pdbCopy;
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}
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}
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if (fSuccess)
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{
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Db dbA(&bitdb.dbenv, 0);
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if (dbA.remove(strFile.c_str(), NULL, 0))
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fSuccess = false;
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Db dbB(&bitdb.dbenv, 0);
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if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0))
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fSuccess = false;
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}
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if (!fSuccess)
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printf("Rewriting of %s FAILED!\n", strFileRes.c_str());
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return fSuccess;
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}
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}
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Sleep(100);
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}
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return false;
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}
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void CDBEnv::Flush(bool fShutdown)
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{
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int64 nStart = GetTimeMillis();
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// Flush log data to the actual data file
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// on all files that are not in use
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printf("Flush(%s)%s\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started");
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if (!fDbEnvInit)
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return;
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{
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LOCK(cs_db);
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map<string, int>::iterator mi = mapFileUseCount.begin();
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while (mi != mapFileUseCount.end())
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{
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string strFile = (*mi).first;
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int nRefCount = (*mi).second;
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printf("%s refcount=%d\n", strFile.c_str(), nRefCount);
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if (nRefCount == 0)
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{
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// Move log data to the dat file
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CloseDb(strFile);
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printf("%s checkpoint\n", strFile.c_str());
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dbenv.txn_checkpoint(0, 0, 0);
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if (!IsChainFile(strFile) || fDetachDB) {
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printf("%s detach\n", strFile.c_str());
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dbenv.lsn_reset(strFile.c_str(), 0);
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}
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printf("%s closed\n", strFile.c_str());
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mapFileUseCount.erase(mi++);
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}
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else
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mi++;
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}
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printf("DBFlush(%s)%s ended %15"PRI64d"ms\n", fShutdown ? "true" : "false", fDbEnvInit ? "" : " db not started", GetTimeMillis() - nStart);
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if (fShutdown)
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{
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char** listp;
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if (mapFileUseCount.empty())
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{
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dbenv.log_archive(&listp, DB_ARCH_REMOVE);
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Close();
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}
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}
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}
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}
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//
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// CTxDB
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//
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bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
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{
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assert(!fClient);
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txindex.SetNull();
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return Read(make_pair(string("tx"), hash), txindex);
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}
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bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
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{
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assert(!fClient);
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return Write(make_pair(string("tx"), hash), txindex);
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}
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bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
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{
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assert(!fClient);
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// Add to tx index
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uint256 hash = tx.GetHash();
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CTxIndex txindex(pos, tx.vout.size());
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return Write(make_pair(string("tx"), hash), txindex);
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}
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bool CTxDB::EraseTxIndex(const CTransaction& tx)
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{
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assert(!fClient);
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uint256 hash = tx.GetHash();
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return Erase(make_pair(string("tx"), hash));
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}
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bool CTxDB::ContainsTx(uint256 hash)
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{
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assert(!fClient);
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return Exists(make_pair(string("tx"), hash));
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}
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bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
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{
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assert(!fClient);
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tx.SetNull();
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if (!ReadTxIndex(hash, txindex))
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return false;
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return (tx.ReadFromDisk(txindex.pos));
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}
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bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
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{
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CTxIndex txindex;
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return ReadDiskTx(hash, tx, txindex);
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}
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bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
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{
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return ReadDiskTx(outpoint.hash, tx, txindex);
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}
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bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
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{
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CTxIndex txindex;
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return ReadDiskTx(outpoint.hash, tx, txindex);
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}
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bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
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{
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return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
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}
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bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
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{
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return Read(string("hashBestChain"), hashBestChain);
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}
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bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
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{
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return Write(string("hashBestChain"), hashBestChain);
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}
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bool CTxDB::ReadBestInvalidWork(CBigNum& bnBestInvalidWork)
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{
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return Read(string("bnBestInvalidWork"), bnBestInvalidWork);
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}
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bool CTxDB::WriteBestInvalidWork(CBigNum bnBestInvalidWork)
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{
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return Write(string("bnBestInvalidWork"), bnBestInvalidWork);
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}
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CBlockIndex static * InsertBlockIndex(uint256 hash)
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{
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if (hash == 0)
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return NULL;
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// Return existing
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map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
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if (mi != mapBlockIndex.end())
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return (*mi).second;
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// Create new
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CBlockIndex* pindexNew = new CBlockIndex();
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if (!pindexNew)
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throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
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mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
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pindexNew->phashBlock = &((*mi).first);
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return pindexNew;
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}
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bool CTxDB::LoadBlockIndex()
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{
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if (!LoadBlockIndexGuts())
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return false;
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if (fRequestShutdown)
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return true;
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// Calculate bnChainWork
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vector<pair<int, CBlockIndex*> > vSortedByHeight;
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vSortedByHeight.reserve(mapBlockIndex.size());
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BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
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{
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CBlockIndex* pindex = item.second;
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vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
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}
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sort(vSortedByHeight.begin(), vSortedByHeight.end());
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BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
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{
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CBlockIndex* pindex = item.second;
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pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
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}
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// Load hashBestChain pointer to end of best chain
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if (!ReadHashBestChain(hashBestChain))
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{
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if (pindexGenesisBlock == NULL)
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return true;
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return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
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}
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if (!mapBlockIndex.count(hashBestChain))
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return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
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pindexBest = mapBlockIndex[hashBestChain];
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nBestHeight = pindexBest->nHeight;
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bnBestChainWork = pindexBest->bnChainWork;
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printf("LoadBlockIndex(): hashBestChain=%s height=%d date=%s\n",
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hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
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DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
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// Load bnBestInvalidWork, OK if it doesn't exist
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ReadBestInvalidWork(bnBestInvalidWork);
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// Verify blocks in the best chain
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int nCheckLevel = GetArg("-checklevel", 1);
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int nCheckDepth = GetArg( "-checkblocks", 2500);
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if (nCheckDepth == 0)
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nCheckDepth = 1000000000; // suffices until the year 19000
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if (nCheckDepth > nBestHeight)
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nCheckDepth = nBestHeight;
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printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
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CBlockIndex* pindexFork = NULL;
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map<pair<unsigned int, unsigned int>, CBlockIndex*> mapBlockPos;
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for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
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{
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if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
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break;
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CBlock block;
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if (!block.ReadFromDisk(pindex))
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return error("LoadBlockIndex() : block.ReadFromDisk failed");
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// check level 1: verify block validity
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if (nCheckLevel>0 && !block.CheckBlock())
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{
|
|
printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
// check level 2: verify transaction index validity
|
|
if (nCheckLevel>1)
|
|
{
|
|
pair<unsigned int, unsigned int> pos = make_pair(pindex->nFile, pindex->nBlockPos);
|
|
mapBlockPos[pos] = pindex;
|
|
BOOST_FOREACH(const CTransaction &tx, block.vtx)
|
|
{
|
|
uint256 hashTx = tx.GetHash();
|
|
CTxIndex txindex;
|
|
if (ReadTxIndex(hashTx, txindex))
|
|
{
|
|
// check level 3: checker transaction hashes
|
|
if (nCheckLevel>2 || pindex->nFile != txindex.pos.nFile || pindex->nBlockPos != txindex.pos.nBlockPos)
|
|
{
|
|
// either an error or a duplicate transaction
|
|
CTransaction txFound;
|
|
if (!txFound.ReadFromDisk(txindex.pos))
|
|
{
|
|
printf("LoadBlockIndex() : *** cannot read mislocated transaction %s\n", hashTx.ToString().c_str());
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
else
|
|
if (txFound.GetHash() != hashTx) // not a duplicate tx
|
|
{
|
|
printf("LoadBlockIndex(): *** invalid tx position for %s\n", hashTx.ToString().c_str());
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
}
|
|
// check level 4: check whether spent txouts were spent within the main chain
|
|
unsigned int nOutput = 0;
|
|
if (nCheckLevel>3)
|
|
{
|
|
BOOST_FOREACH(const CDiskTxPos &txpos, txindex.vSpent)
|
|
{
|
|
if (!txpos.IsNull())
|
|
{
|
|
pair<unsigned int, unsigned int> posFind = make_pair(txpos.nFile, txpos.nBlockPos);
|
|
if (!mapBlockPos.count(posFind))
|
|
{
|
|
printf("LoadBlockIndex(): *** found bad spend at %d, hashBlock=%s, hashTx=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str(), hashTx.ToString().c_str());
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
// check level 6: check whether spent txouts were spent by a valid transaction that consume them
|
|
if (nCheckLevel>5)
|
|
{
|
|
CTransaction txSpend;
|
|
if (!txSpend.ReadFromDisk(txpos))
|
|
{
|
|
printf("LoadBlockIndex(): *** cannot read spending transaction of %s:%i from disk\n", hashTx.ToString().c_str(), nOutput);
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
else if (!txSpend.CheckTransaction())
|
|
{
|
|
printf("LoadBlockIndex(): *** spending transaction of %s:%i is invalid\n", hashTx.ToString().c_str(), nOutput);
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
else
|
|
{
|
|
bool fFound = false;
|
|
BOOST_FOREACH(const CTxIn &txin, txSpend.vin)
|
|
if (txin.prevout.hash == hashTx && txin.prevout.n == nOutput)
|
|
fFound = true;
|
|
if (!fFound)
|
|
{
|
|
printf("LoadBlockIndex(): *** spending transaction of %s:%i does not spend it\n", hashTx.ToString().c_str(), nOutput);
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
nOutput++;
|
|
}
|
|
}
|
|
}
|
|
// check level 5: check whether all prevouts are marked spent
|
|
if (nCheckLevel>4)
|
|
{
|
|
BOOST_FOREACH(const CTxIn &txin, tx.vin)
|
|
{
|
|
CTxIndex txindex;
|
|
if (ReadTxIndex(txin.prevout.hash, txindex))
|
|
if (txindex.vSpent.size()-1 < txin.prevout.n || txindex.vSpent[txin.prevout.n].IsNull())
|
|
{
|
|
printf("LoadBlockIndex(): *** found unspent prevout %s:%i in %s\n", txin.prevout.hash.ToString().c_str(), txin.prevout.n, hashTx.ToString().c_str());
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (pindexFork && !fRequestShutdown)
|
|
{
|
|
// Reorg back to the fork
|
|
printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
|
|
CBlock block;
|
|
if (!block.ReadFromDisk(pindexFork))
|
|
return error("LoadBlockIndex() : block.ReadFromDisk failed");
|
|
CTxDB txdb;
|
|
block.SetBestChain(txdb, pindexFork);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
bool CTxDB::LoadBlockIndexGuts()
|
|
{
|
|
// Get database cursor
|
|
Dbc* pcursor = GetCursor();
|
|
if (!pcursor)
|
|
return false;
|
|
|
|
// Load mapBlockIndex
|
|
unsigned int fFlags = DB_SET_RANGE;
|
|
loop
|
|
{
|
|
// Read next record
|
|
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
|
|
if (fFlags == DB_SET_RANGE)
|
|
ssKey << make_pair(string("blockindex"), uint256(0));
|
|
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
|
|
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
|
|
fFlags = DB_NEXT;
|
|
if (ret == DB_NOTFOUND)
|
|
break;
|
|
else if (ret != 0)
|
|
return false;
|
|
|
|
// Unserialize
|
|
|
|
try {
|
|
string strType;
|
|
ssKey >> strType;
|
|
if (strType == "blockindex" && !fRequestShutdown)
|
|
{
|
|
CDiskBlockIndex diskindex;
|
|
ssValue >> diskindex;
|
|
|
|
// Construct block index object
|
|
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
|
|
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
|
|
pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
|
|
pindexNew->nFile = diskindex.nFile;
|
|
pindexNew->nBlockPos = diskindex.nBlockPos;
|
|
pindexNew->nHeight = diskindex.nHeight;
|
|
pindexNew->nVersion = diskindex.nVersion;
|
|
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
|
|
pindexNew->nTime = diskindex.nTime;
|
|
pindexNew->nBits = diskindex.nBits;
|
|
pindexNew->nNonce = diskindex.nNonce;
|
|
|
|
// Watch for genesis block
|
|
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
|
|
pindexGenesisBlock = pindexNew;
|
|
|
|
if (!pindexNew->CheckIndex())
|
|
return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
|
|
}
|
|
else
|
|
{
|
|
break; // if shutdown requested or finished loading block index
|
|
}
|
|
} // try
|
|
catch (std::exception &e) {
|
|
return error("%s() : deserialize error", __PRETTY_FUNCTION__);
|
|
}
|
|
}
|
|
pcursor->close();
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// CAddrDB
|
|
//
|
|
|
|
|
|
CAddrDB::CAddrDB()
|
|
{
|
|
pathAddr = GetDataDir() / "peers.dat";
|
|
}
|
|
|
|
bool CAddrDB::Write(const CAddrMan& addr)
|
|
{
|
|
// Generate random temporary filename
|
|
unsigned short randv = 0;
|
|
RAND_bytes((unsigned char *)&randv, sizeof(randv));
|
|
std::string tmpfn = strprintf("peers.dat.%04x", randv);
|
|
|
|
// serialize addresses, checksum data up to that point, then append csum
|
|
CDataStream ssPeers(SER_DISK, CLIENT_VERSION);
|
|
ssPeers << FLATDATA(pchMessageStart);
|
|
ssPeers << addr;
|
|
uint256 hash = Hash(ssPeers.begin(), ssPeers.end());
|
|
ssPeers << hash;
|
|
|
|
// open temp output file, and associate with CAutoFile
|
|
boost::filesystem::path pathTmp = GetDataDir() / tmpfn;
|
|
FILE *file = fopen(pathTmp.string().c_str(), "wb");
|
|
CAutoFile fileout = CAutoFile(file, SER_DISK, CLIENT_VERSION);
|
|
if (!fileout)
|
|
return error("CAddrman::Write() : open failed");
|
|
|
|
// Write and commit header, data
|
|
try {
|
|
fileout << ssPeers;
|
|
}
|
|
catch (std::exception &e) {
|
|
return error("CAddrman::Write() : I/O error");
|
|
}
|
|
FileCommit(fileout);
|
|
fileout.fclose();
|
|
|
|
// replace existing peers.dat, if any, with new peers.dat.XXXX
|
|
if (!RenameOver(pathTmp, pathAddr))
|
|
return error("CAddrman::Write() : Rename-into-place failed");
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CAddrDB::Read(CAddrMan& addr)
|
|
{
|
|
// open input file, and associate with CAutoFile
|
|
FILE *file = fopen(pathAddr.string().c_str(), "rb");
|
|
CAutoFile filein = CAutoFile(file, SER_DISK, CLIENT_VERSION);
|
|
if (!filein)
|
|
return error("CAddrman::Read() : open failed");
|
|
|
|
// use file size to size memory buffer
|
|
int fileSize = GetFilesize(filein);
|
|
int dataSize = fileSize - sizeof(uint256);
|
|
vector<unsigned char> vchData;
|
|
vchData.resize(dataSize);
|
|
uint256 hashIn;
|
|
|
|
// read data and checksum from file
|
|
try {
|
|
filein.read((char *)&vchData[0], dataSize);
|
|
filein >> hashIn;
|
|
}
|
|
catch (std::exception &e) {
|
|
return error("CAddrman::Read() 2 : I/O error or stream data corrupted");
|
|
}
|
|
filein.fclose();
|
|
|
|
CDataStream ssPeers(vchData, SER_DISK, CLIENT_VERSION);
|
|
|
|
// verify stored checksum matches input data
|
|
uint256 hashTmp = Hash(ssPeers.begin(), ssPeers.end());
|
|
if (hashIn != hashTmp)
|
|
return error("CAddrman::Read() : checksum mismatch; data corrupted");
|
|
|
|
// de-serialize address data
|
|
unsigned char pchMsgTmp[4];
|
|
try {
|
|
ssPeers >> FLATDATA(pchMsgTmp);
|
|
ssPeers >> addr;
|
|
}
|
|
catch (std::exception &e) {
|
|
return error("CAddrman::Read() : I/O error or stream data corrupted");
|
|
}
|
|
|
|
// finally, verify the network matches ours
|
|
if (memcmp(pchMsgTmp, pchMessageStart, sizeof(pchMsgTmp)))
|
|
return error("CAddrman::Read() : invalid network magic number");
|
|
|
|
return true;
|
|
}
|
|
|