BIP155 (addrv2)

Tor v3 + i2p

src/addrdb.cpp

@@ -0,0 +1,122 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2016 The Bitcoin Core developers
+// Copyright (c) 2016-2022 The Hush developers
+// Distributed under the GPLv3 software license, see the accompanying
+// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
+
+#include "addrdb.h"
+#include "addrman.h"
+#include "chainparams.h"
+#include "clientversion.h"
+#include "fs.h"
+#include "hash.h"
+#include "random.h"
+#include "streams.h"
+#include "tinyformat.h"
+#include "util.h"
+
+namespace {
+
+template <typename Stream, typename Data>
+bool SerializeDB(Stream& stream, const Data& data)
+{
+    // Write and commit header, data
+    try {
+        CHashWriter hasher(stream.GetType(), stream.GetVersion());
+        stream << FLATDATA(Params().MessageStart()) << data;
+        hasher << FLATDATA(Params().MessageStart()) << data;
+        stream << hasher.GetHash();
+    } catch (const std::exception& e) {
+        return error("%s: Serialize or I/O error - %s", __func__, e.what());
+    }
+
+    return true;
+}
+
+template <typename Data>
+bool SerializeFileDB(const std::string& prefix, const fs::path& path, const Data& data)
+{
+    // Generate random temporary filename
+    unsigned short randv = 0;
+    GetRandBytes((unsigned char*)&randv, sizeof(randv));
+    std::string tmpfn = strprintf("%s.%04x", prefix, randv);
+
+    // open temp output file, and associate with CAutoFile
+    fs::path pathTmp = GetDataDir() / tmpfn;
+    FILE *file = fsbridge::fopen(pathTmp, "wb");
+    CAutoFile fileout(file, SER_DISK, CLIENT_VERSION);
+    if (fileout.IsNull())
+        return error("%s: Failed to open file %s", __func__, pathTmp.string());
+
+    // Serialize
+    if (!SerializeDB(fileout, data)) return false;
+    FileCommit(fileout.Get());
+    fileout.fclose();
+
+    // replace existing file, if any, with new file
+    if (!RenameOver(pathTmp, path))
+        return error("%s: Rename-into-place failed", __func__);
+
+    return true;
+}
+
+template <typename Stream, typename Data>
+bool DeserializeDB(Stream& stream, Data& data, bool fCheckSum = true)
+{
+    try {
+        CHashVerifier<Stream> verifier(&stream);
+        // de-serialize file header (network specific magic number) and ..
+        unsigned char pchMsgTmp[4];
+        verifier >> FLATDATA(pchMsgTmp);
+        // ... verify the network matches ours
+        if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp)))
+            return error("%s: Invalid network magic number", __func__);
+
+        // de-serialize data
+        verifier >> data;
+
+        // verify checksum
+        if (fCheckSum) {
+            uint256 hashTmp;
+            stream >> hashTmp;
+            if (hashTmp != verifier.GetHash()) {
+                return error("%s: Checksum mismatch, data corrupted", __func__);
+            }
+        }
+    }
+    catch (const std::exception& e) {
+        return error("%s: Deserialize or I/O error - %s", __func__, e.what());
+    }
+
+    return true;
+}
+
+template <typename Data>
+bool DeserializeFileDB(const fs::path& path, Data& data)
+{
+    // open input file, and associate with CAutoFile
+    FILE *file = fsbridge::fopen(path, "rb");
+    CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
+    if (filein.IsNull())
+        return error("%s: Failed to open file %s", __func__, path.string());
+
+    return DeserializeDB(filein, data);
+}
+
+}
+
+CBanDB::CBanDB()
+{
+    pathBanlist = GetDataDir() / "banlist.dat";
+}
+
+bool CBanDB::Write(const banmap_t& banSet)
+{
+    return SerializeFileDB("banlist", pathBanlist, banSet);
+}
+
+bool CBanDB::Read(banmap_t& banSet)
+{
+    return DeserializeFileDB(pathBanlist, banSet);
+}
+