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bitcoin/src/addrdb.cpp at master · Dash-OS/bitcoin · GitHub
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//
Copyright (c) 2009-2010 Satoshi Nakamoto
//
Copyright (c) 2009-2017 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
>
namespace
{
template
<
typename
Stream,
typename
Data>
bool
SerializeDB
(Stream& stream,
const
Data& data)
{
//
Write and commit header, data
try
{
CHashWriter
hasher
(
SER_DISK
,
CLIENT_VERSION
);
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);
}
CAddrDB::CAddrDB
()
{
pathAddr =
GetDataDir
() /
"
peers.dat
"
;
}
bool
CAddrDB::Write
(
const
CAddrMan& addr)
{
return
SerializeFileDB
(
"
peers
"
, pathAddr, addr);
}
bool
CAddrDB::Read
(CAddrMan& addr)
{
return
DeserializeFileDB
(pathAddr, addr);
}
bool
CAddrDB::Read
(CAddrMan& addr, CDataStream& ssPeers)
{
bool
ret =
DeserializeDB
(ssPeers, addr,
false
);
if
(!ret) {
//
Ensure addrman is left in a clean state
addr.
Clear
();
}
return
ret;
}
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