// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2011 The Bitcoin developers
+// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
-// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "protocol.h"
#include "util.h"
# include <arpa/inet.h>
#endif
+// The message start string is designed to be unlikely to occur in normal data.
+// The characters are rarely used upper ascii, not valid as UTF-8, and produce
+// a large 4-byte int at any alignment.
+
+// Public testnet message start
+// unsigned char pchMessageStartTestBitcoin[4] = { 0x9b, 0xa1, 0xb2, 0xb6 };
+static unsigned char pchMessageStartTestOld[4] = { 0xdb, 0xe1, 0xf2, 0xf6 };
+static unsigned char pchMessageStartTestNew[4] = { 0xcb, 0xf2, 0xc0, 0xef };
+static unsigned int nMessageStartTestSwitchTime = 1346200000;
+
+// PPCoin message start (switch from Bitcoin's in v0.2)
+static unsigned char pchMessageStartBitcoin[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
+static unsigned char pchMessageStartPPCoin[4] = { 0xe6, 0xe8, 0xe9, 0xe5 };
+static unsigned int nMessageStartSwitchTime = 1347300000;
+
+void GetMessageStart(unsigned char pchMessageStart[], bool fPersistent)
+{
+ if (fTestNet)
+ memcpy(pchMessageStart, (fPersistent || GetAdjustedTime() > nMessageStartTestSwitchTime)? pchMessageStartTestNew : pchMessageStartTestOld, sizeof(pchMessageStartTestNew));
+ else
+ memcpy(pchMessageStart, (fPersistent || GetAdjustedTime() > nMessageStartSwitchTime)? pchMessageStartPPCoin : pchMessageStartBitcoin, sizeof(pchMessageStartPPCoin));
+}
+
static const char* ppszTypeName[] =
{
"ERROR",
CMessageHeader::CMessageHeader()
{
- memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart));
+ GetMessageStart(pchMessageStart);
memset(pchCommand, 0, sizeof(pchCommand));
pchCommand[1] = 1;
nMessageSize = -1;
CMessageHeader::CMessageHeader(const char* pszCommand, unsigned int nMessageSizeIn)
{
- memcpy(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart));
+ GetMessageStart(pchMessageStart);
strncpy(pchCommand, pszCommand, COMMAND_SIZE);
nMessageSize = nMessageSizeIn;
nChecksum = 0;
bool CMessageHeader::IsValid() const
{
// Check start string
- if (memcmp(pchMessageStart, ::pchMessageStart, sizeof(pchMessageStart)) != 0)
+ unsigned char pchMessageStartProtocol[4];
+ GetMessageStart(pchMessageStartProtocol);
+ if (memcmp(pchMessageStart, pchMessageStartProtocol, sizeof(pchMessageStart)) != 0)
return false;
// Check the command string for errors
CInv::CInv(const std::string& strType, const uint256& hashIn)
{
- int i;
+ unsigned int i;
for (i = 1; i < ARRAYLEN(ppszTypeName); i++)
{
if (strType == ppszTypeName[i])
bool CInv::IsKnownType() const
{
- return (type >= 1 && type < ARRAYLEN(ppszTypeName));
+ return (type >= 1 && type < (int)ARRAYLEN(ppszTypeName));
}
const char* CInv::GetCommand() const