net: move CBanDB and CAddrDB out of net.h/cpp

This will eventually solve a circular dependency

1 files changed, 218 insertions, 0 deletions

diff --git a/src/addrdb.cpp b/src/addrdb.cpp
new file mode 100644
index 0000000000..ddf41f92de
--- /dev/null
+++ b/src/addrdb.cpp
@@ -0,0 +1,218 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2015 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "addrdb.h"
+
+#include "addrman.h"
+#include "chainparams.h"
+#include "clientversion.h"
+#include "hash.h"
+#include "random.h"
+#include "streams.h"
+#include "tinyformat.h"
+#include "util.h"
+
+#include <boost/filesystem.hpp>
+
+CBanDB::CBanDB()
+{
+    pathBanlist = GetDataDir() / "banlist.dat";
+}
+
+bool CBanDB::Write(const banmap_t& banSet)
+{
+    // Generate random temporary filename
+    unsigned short randv = 0;
+    GetRandBytes((unsigned char*)&randv, sizeof(randv));
+    std::string tmpfn = strprintf("banlist.dat.%04x", randv);
+
+    // serialize banlist, checksum data up to that point, then append csum
+    CDataStream ssBanlist(SER_DISK, CLIENT_VERSION);
+    ssBanlist << FLATDATA(Params().MessageStart());
+    ssBanlist << banSet;
+    uint256 hash = Hash(ssBanlist.begin(), ssBanlist.end());
+    ssBanlist << 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(file, SER_DISK, CLIENT_VERSION);
+    if (fileout.IsNull())
+        return error("%s: Failed to open file %s", __func__, pathTmp.string());
+
+    // Write and commit header, data
+    try {
+        fileout << ssBanlist;
+    }
+    catch (const std::exception& e) {
+        return error("%s: Serialize or I/O error - %s", __func__, e.what());
+    }
+    FileCommit(fileout.Get());
+    fileout.fclose();
+
+    // replace existing banlist.dat, if any, with new banlist.dat.XXXX
+    if (!RenameOver(pathTmp, pathBanlist))
+        return error("%s: Rename-into-place failed", __func__);
+
+    return true;
+}
+
+bool CBanDB::Read(banmap_t& banSet)
+{
+    // open input file, and associate with CAutoFile
+    FILE *file = fopen(pathBanlist.string().c_str(), "rb");
+    CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
+    if (filein.IsNull())
+        return error("%s: Failed to open file %s", __func__, pathBanlist.string());
+
+    // use file size to size memory buffer
+    uint64_t fileSize = boost::filesystem::file_size(pathBanlist);
+    uint64_t dataSize = 0;
+    // Don't try to resize to a negative number if file is small
+    if (fileSize >= sizeof(uint256))
+        dataSize = fileSize - sizeof(uint256);
+    std::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 (const std::exception& e) {
+        return error("%s: Deserialize or I/O error - %s", __func__, e.what());
+    }
+    filein.fclose();
+
+    CDataStream ssBanlist(vchData, SER_DISK, CLIENT_VERSION);
+
+    // verify stored checksum matches input data
+    uint256 hashTmp = Hash(ssBanlist.begin(), ssBanlist.end());
+    if (hashIn != hashTmp)
+        return error("%s: Checksum mismatch, data corrupted", __func__);
+
+    unsigned char pchMsgTmp[4];
+    try {
+        // de-serialize file header (network specific magic number) and ..
+        ssBanlist >> FLATDATA(pchMsgTmp);
+
+        // ... verify the network matches ours
+        if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp)))
+            return error("%s: Invalid network magic number", __func__);
+
+        // de-serialize address data into one CAddrMan object
+        ssBanlist >> banSet;
+    }
+    catch (const std::exception& e) {
+        return error("%s: Deserialize or I/O error - %s", __func__, e.what());
+    }
+
+    return true;
+}
+
+CAddrDB::CAddrDB()
+{
+    pathAddr = GetDataDir() / "peers.dat";
+}
+
+bool CAddrDB::Write(const CAddrMan& addr)
+{
+    // Generate random temporary filename
+    unsigned short randv = 0;
+    GetRandBytes((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(Params().MessageStart());
+    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(file, SER_DISK, CLIENT_VERSION);
+    if (fileout.IsNull())
+        return error("%s: Failed to open file %s", __func__, pathTmp.string());
+
+    // Write and commit header, data
+    try {
+        fileout << ssPeers;
+    }
+    catch (const std::exception& e) {
+        return error("%s: Serialize or I/O error - %s", __func__, e.what());
+    }
+    FileCommit(fileout.Get());
+    fileout.fclose();
+
+    // replace existing peers.dat, if any, with new peers.dat.XXXX
+    if (!RenameOver(pathTmp, pathAddr))
+        return error("%s: Rename-into-place failed", __func__);
+
+    return true;
+}
+
+bool CAddrDB::Read(CAddrMan& addr)
+{
+    // open input file, and associate with CAutoFile
+    FILE *file = fopen(pathAddr.string().c_str(), "rb");
+    CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
+    if (filein.IsNull())
+        return error("%s: Failed to open file %s", __func__, pathAddr.string());
+
+    // use file size to size memory buffer
+    uint64_t fileSize = boost::filesystem::file_size(pathAddr);
+    uint64_t dataSize = 0;
+    // Don't try to resize to a negative number if file is small
+    if (fileSize >= sizeof(uint256))
+        dataSize = fileSize - sizeof(uint256);
+    std::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 (const std::exception& e) {
+        return error("%s: Deserialize or I/O error - %s", __func__, e.what());
+    }
+    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("%s: Checksum mismatch, data corrupted", __func__);
+
+    return Read(addr, ssPeers);
+}
+
+bool CAddrDB::Read(CAddrMan& addr, CDataStream& ssPeers)
+{
+    unsigned char pchMsgTmp[4];
+    try {
+        // de-serialize file header (network specific magic number) and ..
+        ssPeers >> FLATDATA(pchMsgTmp);
+
+        // ... verify the network matches ours
+        if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp)))
+            return error("%s: Invalid network magic number", __func__);
+
+        // de-serialize address data into one CAddrMan object
+        ssPeers >> addr;
+    }
+    catch (const std::exception& e) {
+        // de-serialization has failed, ensure addrman is left in a clean state
+        addr.Clear();
+        return error("%s: Deserialize or I/O error - %s", __func__, e.what());
+    }
+
+    return true;
+}