dash/src/protocol.cpp

// 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 "protocol.h"

#include "util.h"
#include "utilstrencodings.h"

#ifndef WIN32
# include <arpa/inet.h>
#endif

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 *ALERT="alert";
const char *NOTFOUND="notfound";
const char *FILTERLOAD="filterload";
const char *FILTERADD="filteradd";
const char *FILTERCLEAR="filterclear";
const char *REJECT="reject";
const char *SENDHEADERS="sendheaders";
const char *SENDCMPCT="sendcmpct";
const char *CMPCTBLOCK="cmpctblock";
const char *GETBLOCKTXN="getblocktxn";
const char *BLOCKTXN="blocktxn";
// Dash message types
const char *TXLOCKREQUEST="ix";
const char *TXLOCKVOTE="txlvote";
const char *SPORK="spork";
const char *GETSPORKS="getsporks";
const char *DSACCEPT="dsa";
const char *DSVIN="dsi";
const char *DSFINALTX="dsf";
const char *DSSIGNFINALTX="dss";
const char *DSCOMPLETE="dsc";
const char *DSSTATUSUPDATE="dssu";
const char *DSTX="dstx";
const char *DSQUEUE="dsq";
const char *SYNCSTATUSCOUNT="ssc";
const char *MNGOVERNANCESYNC="govsync";
const char *MNGOVERNANCEOBJECT="govobj";
const char *MNGOVERNANCEOBJECTVOTE="govobjvote";
const char *GETMNLISTDIFF="getmnlistd";
const char *MNLISTDIFF="mnlistdiff";
const char *QFCOMMITMENT="qfcommit";
const char *QCONTRIB="qcontrib";
};

static const char* ppszTypeName[] =
{
    "ERROR", // Should never occur
    NetMsgType::TX,
    NetMsgType::BLOCK,
    "filtered block", // Should never occur
    // Dash message types
    // NOTE: include non-implmented here, we must keep this list in sync with enum in protocol.h
    NetMsgType::TXLOCKREQUEST,
    NetMsgType::TXLOCKVOTE,
    NetMsgType::SPORK,
    "unused inv type 7",
    "unused inv type 8",
    "unused inv type 9",
    "unused inv type 10",
    "unused inv type 11",
    "unused inv type 12",
    "unused inv type 13",
    "unused inv type 14",
    "unused inv type 15",
    NetMsgType::DSTX,
    NetMsgType::MNGOVERNANCEOBJECT,
    NetMsgType::MNGOVERNANCEOBJECTVOTE,
    "unused inv type 19",
    "compact block", // Should never occur
    NetMsgType::QFCOMMITMENT,
    "qdcommit", // was only shortly used on testnet
    NetMsgType::QCONTRIB,
};

/** 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::ALERT,
    NetMsgType::NOTFOUND,
    NetMsgType::FILTERLOAD,
    NetMsgType::FILTERADD,
    NetMsgType::FILTERCLEAR,
    NetMsgType::REJECT,
    NetMsgType::SENDHEADERS,
    NetMsgType::SENDCMPCT,
    NetMsgType::CMPCTBLOCK,
    NetMsgType::GETBLOCKTXN,
    NetMsgType::BLOCKTXN,
    // Dash message types
    // NOTE: do NOT include non-implmented here, we want them to be "Unknown command" in ProcessMessage()
    NetMsgType::TXLOCKREQUEST,
    NetMsgType::TXLOCKVOTE,
    NetMsgType::SPORK,
    NetMsgType::GETSPORKS,
    NetMsgType::DSACCEPT,
    NetMsgType::DSVIN,
    NetMsgType::DSFINALTX,
    NetMsgType::DSSIGNFINALTX,
    NetMsgType::DSCOMPLETE,
    NetMsgType::DSSTATUSUPDATE,
    NetMsgType::DSTX,
    NetMsgType::DSQUEUE,
    NetMsgType::SYNCSTATUSCOUNT,
    NetMsgType::MNGOVERNANCESYNC,
    NetMsgType::MNGOVERNANCEOBJECT,
    NetMsgType::MNGOVERNANCEOBJECTVOTE,
    NetMsgType::GETMNLISTDIFF,
    NetMsgType::MNLISTDIFF,
    NetMsgType::QFCOMMITMENT,
    NetMsgType::QCONTRIB,
};
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);
    memset(pchCommand, 0, sizeof(pchCommand));
    strncpy(pchCommand, pszCommand, COMMAND_SIZE);
    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;
}



CAddress::CAddress() : CService()
{
    Init();
}

CAddress::CAddress(CService ipIn, ServiceFlags nServicesIn) : CService(ipIn)
{
    Init();
    nServices = nServicesIn;
}

void CAddress::Init()
{
    nServices = NODE_NONE;
    nTime = 100000000;
}

CInv::CInv()
{
    type = 0;
    hash.SetNull();
}

CInv::CInv(int typeIn, const uint256& hashIn)
{
    type = typeIn;
    hash = hashIn;
}

CInv::CInv(const std::string& strType, const uint256& hashIn)
{
    unsigned int i;
    for (i = 1; i < ARRAYLEN(ppszTypeName); i++)
    {
        if (strType == ppszTypeName[i])
        {
            type = i;
            break;
        }
    }
    if (i == ARRAYLEN(ppszTypeName))
        throw std::out_of_range(strprintf("CInv::CInv(string, uint256): unknown type '%s'", strType));
    hash = hashIn;
}

bool operator<(const CInv& a, const CInv& b)
{
    return (a.type < b.type || (a.type == b.type && a.hash < b.hash));
}

bool CInv::IsKnownType() const
{
    return (type >= 1 && type < (int)ARRAYLEN(ppszTypeName));
}

const char* CInv::GetCommand() const
{
    if (!IsKnownType())
        throw std::out_of_range(strprintf("CInv::GetCommand(): type=%d unknown type", type));
    return ppszTypeName[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;
}