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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2019 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 <protocol.h>
#include <util/strencodings.h>
#include <util/system.h>
#ifndef WIN32
# include <arpa/inet.h>
#endif
static std::atomic<bool> g_initial_block_download_completed(false);
namespace NetMsgType {
const char *VERSION="version";
const char *VERACK="verack";
const char *ADDR="addr";
const char *INV="inv";
const char *GETDATA="getdata";
const char *MERKLEBLOCK="merkleblock";
const char *GETBLOCKS="getblocks";
const char *GETHEADERS="getheaders";
const char *TX="tx";
const char *HEADERS="headers";
const char *BLOCK="block";
const char *GETADDR="getaddr";
const char *MEMPOOL="mempool";
const char *PING="ping";
const char *PONG="pong";
const char *NOTFOUND="notfound";
const char *FILTERLOAD="filterload";
const char *FILTERADD="filteradd";
const char *FILTERCLEAR="filterclear";
const char *SENDHEADERS="sendheaders";
const char *FEEFILTER="feefilter";
const char *SENDCMPCT="sendcmpct";
const char *CMPCTBLOCK="cmpctblock";
const char *GETBLOCKTXN="getblocktxn";
const char *BLOCKTXN="blocktxn";
const char *GETCFILTERS="getcfilters";
const char *CFILTER="cfilter";
const char *GETCFHEADERS="getcfheaders";
const char *CFHEADERS="cfheaders";
const char *GETCFCHECKPT="getcfcheckpt";
const char *CFCHECKPT="cfcheckpt";
} // namespace NetMsgType
/** All known message types. Keep this in the same order as the list of
* messages above and in protocol.h.
*/
const static std::string allNetMessageTypes[] = {
NetMsgType::VERSION,
NetMsgType::VERACK,
NetMsgType::ADDR,
NetMsgType::INV,
NetMsgType::GETDATA,
NetMsgType::MERKLEBLOCK,
NetMsgType::GETBLOCKS,
NetMsgType::GETHEADERS,
NetMsgType::TX,
NetMsgType::HEADERS,
NetMsgType::BLOCK,
NetMsgType::GETADDR,
NetMsgType::MEMPOOL,
NetMsgType::PING,
NetMsgType::PONG,
NetMsgType::NOTFOUND,
NetMsgType::FILTERLOAD,
NetMsgType::FILTERADD,
NetMsgType::FILTERCLEAR,
NetMsgType::SENDHEADERS,
NetMsgType::FEEFILTER,
NetMsgType::SENDCMPCT,
NetMsgType::CMPCTBLOCK,
NetMsgType::GETBLOCKTXN,
NetMsgType::BLOCKTXN,
NetMsgType::GETCFILTERS,
NetMsgType::CFILTER,
NetMsgType::GETCFHEADERS,
NetMsgType::CFHEADERS,
NetMsgType::GETCFCHECKPT,
NetMsgType::CFCHECKPT,
};
const static std::vector<std::string> allNetMessageTypesVec(allNetMessageTypes, allNetMessageTypes+ARRAYLEN(allNetMessageTypes));
CMessageHeader::CMessageHeader(const MessageStartChars& pchMessageStartIn)
{
memcpy(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE);
memset(pchCommand, 0, sizeof(pchCommand));
nMessageSize = -1;
memset(pchChecksum, 0, CHECKSUM_SIZE);
}
CMessageHeader::CMessageHeader(const MessageStartChars& pchMessageStartIn, const char* pszCommand, unsigned int nMessageSizeIn)
{
memcpy(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE);
// Copy the command name, zero-padding to COMMAND_SIZE bytes
size_t i = 0;
for (; i < COMMAND_SIZE && pszCommand[i] != 0; ++i) pchCommand[i] = pszCommand[i];
assert(pszCommand[i] == 0); // Assert that the command name passed in is not longer than COMMAND_SIZE
for (; i < COMMAND_SIZE; ++i) pchCommand[i] = 0;
nMessageSize = nMessageSizeIn;
memset(pchChecksum, 0, CHECKSUM_SIZE);
}
std::string CMessageHeader::GetCommand() const
{
return std::string(pchCommand, pchCommand + strnlen(pchCommand, COMMAND_SIZE));
}
bool CMessageHeader::IsValid(const MessageStartChars& pchMessageStartIn) const
{
// Check start string
if (memcmp(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE) != 0)
return false;
// Check the command string for errors
for (const char* p1 = pchCommand; p1 < pchCommand + COMMAND_SIZE; p1++)
{
if (*p1 == 0)
{
// Must be all zeros after the first zero
for (; p1 < pchCommand + COMMAND_SIZE; p1++)
if (*p1 != 0)
return false;
}
else if (*p1 < ' ' || *p1 > 0x7E)
return false;
}
// Message size
if (nMessageSize > MAX_SIZE)
{
LogPrintf("CMessageHeader::IsValid(): (%s, %u bytes) nMessageSize > MAX_SIZE\n", GetCommand(), nMessageSize);
return false;
}
return true;
}
ServiceFlags GetDesirableServiceFlags(ServiceFlags services) {
if ((services & NODE_NETWORK_LIMITED) && g_initial_block_download_completed) {
return ServiceFlags(NODE_NETWORK_LIMITED | NODE_WITNESS);
}
return ServiceFlags(NODE_NETWORK | NODE_WITNESS);
}
void SetServiceFlagsIBDCache(bool state) {
g_initial_block_download_completed = state;
}
CInv::CInv()
{
type = 0;
hash.SetNull();
}
CInv::CInv(int typeIn, const uint256& hashIn) : type(typeIn), hash(hashIn) {}
bool operator<(const CInv& a, const CInv& b)
{
return (a.type < b.type || (a.type == b.type && a.hash < b.hash));
}
std::string CInv::GetCommand() const
{
std::string cmd;
if (type & MSG_WITNESS_FLAG)
cmd.append("witness-");
int masked = type & MSG_TYPE_MASK;
switch (masked)
{
case MSG_TX: return cmd.append(NetMsgType::TX);
case MSG_BLOCK: return cmd.append(NetMsgType::BLOCK);
case MSG_FILTERED_BLOCK: return cmd.append(NetMsgType::MERKLEBLOCK);
case MSG_CMPCT_BLOCK: return cmd.append(NetMsgType::CMPCTBLOCK);
default:
throw std::out_of_range(strprintf("CInv::GetCommand(): type=%d unknown type", type));
}
}
std::string CInv::ToString() const
{
try {
return strprintf("%s %s", GetCommand(), hash.ToString());
} catch(const std::out_of_range &) {
return strprintf("0x%08x %s", type, hash.ToString());
}
}
const std::vector<std::string> &getAllNetMessageTypes()
{
return allNetMessageTypesVec;
}
/**
* Convert a service flag (NODE_*) to a human readable string.
* It supports unknown service flags which will be returned as "UNKNOWN[...]".
* @param[in] bit the service flag is calculated as (1 << bit)
*/
static std::string serviceFlagToStr(size_t bit)
{
const uint64_t service_flag = 1ULL << bit;
switch ((ServiceFlags)service_flag) {
case NODE_NONE: abort(); // impossible
case NODE_NETWORK: return "NETWORK";
case NODE_GETUTXO: return "GETUTXO";
case NODE_BLOOM: return "BLOOM";
case NODE_WITNESS: return "WITNESS";
case NODE_NETWORK_LIMITED: return "NETWORK_LIMITED";
// Not using default, so we get warned when a case is missing
}
std::ostringstream stream;
stream.imbue(std::locale::classic());
stream << "UNKNOWN[";
stream << "2^" << bit;
stream << "]";
return stream.str();
}
std::vector<std::string> serviceFlagsToStr(uint64_t flags)
{
std::vector<std::string> str_flags;
for (size_t i = 0; i < sizeof(flags) * 8; ++i) {
if (flags & (1ULL << i)) {
str_flags.emplace_back(serviceFlagToStr(i));
}
}
return str_flags;
}
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