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net: Add and document network messages in protocol.h

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- Avoids string typos (by making the compiler check)
- Makes it easier to grep for handling/generation of a certain message type
- Refer directly to documentation by following the symbol in IDE
- Move list of valid message types to protocol.cpp:
    protocol.cpp is a more appropriate place for this, and having
    the array there makes it easier to keep things consistent.

Github-Pull: #7181
Rebased-From: 9bbe71b641
This commit is contained in:
Wladimir J. van der Laan 2015-12-07 15:31:32 +01:00
parent 44fef99e66
commit 8fc174aae6
No known key found for this signature in database
GPG Key ID: 74810B012346C9A6
5 changed files with 281 additions and 63 deletions
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2
src/alert.cpp
View File

@ -138,7 +138,7 @@ bool CAlert::RelayTo(CNode* pnode) const
AppliesToMe() || AppliesToMe() ||
GetAdjustedTime() < nRelayUntil) GetAdjustedTime() < nRelayUntil)
{ {
pnode->PushMessage("alert", *this); pnode->PushMessage(NetMsgType::ALERT, *this);
return true; return true;
} }
} }

114
src/main.cpp
View File

@ -4171,14 +4171,14 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
if (!ReadBlockFromDisk(block, (*mi).second, consensusParams)) if (!ReadBlockFromDisk(block, (*mi).second, consensusParams))
assert(!"cannot load block from disk"); assert(!"cannot load block from disk");
if (inv.type == MSG_BLOCK) if (inv.type == MSG_BLOCK)
pfrom->PushMessage("block", block); pfrom->PushMessage(NetMsgType::BLOCK, block);
else // MSG_FILTERED_BLOCK) else // MSG_FILTERED_BLOCK)
{ {
LOCK(pfrom->cs_filter); LOCK(pfrom->cs_filter);
if (pfrom->pfilter) if (pfrom->pfilter)
{ {
CMerkleBlock merkleBlock(block, *pfrom->pfilter); CMerkleBlock merkleBlock(block, *pfrom->pfilter);
pfrom->PushMessage("merkleblock", merkleBlock); pfrom->PushMessage(NetMsgType::MERKLEBLOCK, merkleBlock);
// CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see // CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see
// This avoids hurting performance by pointlessly requiring a round-trip // This avoids hurting performance by pointlessly requiring a round-trip
// Note that there is currently no way for a node to request any single transactions we didn't send here - // Note that there is currently no way for a node to request any single transactions we didn't send here -
@ -4187,7 +4187,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
// however we MUST always provide at least what the remote peer needs // however we MUST always provide at least what the remote peer needs
typedef std::pair<unsigned int, uint256> PairType; typedef std::pair<unsigned int, uint256> PairType;
BOOST_FOREACH(PairType& pair, merkleBlock.vMatchedTxn) BOOST_FOREACH(PairType& pair, merkleBlock.vMatchedTxn)
pfrom->PushMessage("tx", block.vtx[pair.first]); pfrom->PushMessage(NetMsgType::TX, block.vtx[pair.first]);
} }
// else // else
// no response // no response
@ -4201,7 +4201,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
// wait for other stuff first. // wait for other stuff first.
vector<CInv> vInv; vector<CInv> vInv;
vInv.push_back(CInv(MSG_BLOCK, chainActive.Tip()->GetBlockHash())); vInv.push_back(CInv(MSG_BLOCK, chainActive.Tip()->GetBlockHash()));
pfrom->PushMessage("inv", vInv); pfrom->PushMessage(NetMsgType::INV, vInv);
pfrom->hashContinue.SetNull(); pfrom->hashContinue.SetNull();
} }
} }
@ -4224,7 +4224,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION); CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
ss.reserve(1000); ss.reserve(1000);
ss << tx; ss << tx;
pfrom->PushMessage("tx", ss); pfrom->PushMessage(NetMsgType::TX, ss);
pushed = true; pushed = true;
} }
} }
@ -4251,7 +4251,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
// do that because they want to know about (and store and rebroadcast and // do that because they want to know about (and store and rebroadcast and
// risk analyze) the dependencies of transactions relevant to them, without // risk analyze) the dependencies of transactions relevant to them, without
// having to download the entire memory pool. // having to download the entire memory pool.
pfrom->PushMessage("notfound", vNotFound); pfrom->PushMessage(NetMsgType::NOTFOUND, vNotFound);
} }
} }
@ -4268,9 +4268,9 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
if (!(nLocalServices & NODE_BLOOM) && if (!(nLocalServices & NODE_BLOOM) &&
(strCommand == "filterload" || (strCommand == NetMsgType::FILTERLOAD ||
strCommand == "filteradd" || strCommand == NetMsgType::FILTERADD ||
strCommand == "filterclear")) strCommand == NetMsgType::FILTERCLEAR))
{ {
if (pfrom->nVersion >= NO_BLOOM_VERSION) { if (pfrom->nVersion >= NO_BLOOM_VERSION) {
Misbehaving(pfrom->GetId(), 100); Misbehaving(pfrom->GetId(), 100);
@ -4282,12 +4282,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
if (strCommand == "version") if (strCommand == NetMsgType::VERSION)
{ {
// Each connection can only send one version message // Each connection can only send one version message
if (pfrom->nVersion != 0) if (pfrom->nVersion != 0)
{ {
pfrom->PushMessage("reject", strCommand, REJECT_DUPLICATE, string("Duplicate version message")); pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_DUPLICATE, string("Duplicate version message"));
Misbehaving(pfrom->GetId(), 1); Misbehaving(pfrom->GetId(), 1);
return false; return false;
} }
@ -4301,7 +4301,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
{ {
// disconnect from peers older than this proto version // disconnect from peers older than this proto version
LogPrintf("peer=%d using obsolete version %i; disconnecting\n", pfrom->id, pfrom->nVersion); LogPrintf("peer=%d using obsolete version %i; disconnecting\n", pfrom->id, pfrom->nVersion);
pfrom->PushMessage("reject", strCommand, REJECT_OBSOLETE, pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE,
strprintf("Version must be %d or greater", MIN_PEER_PROTO_VERSION)); strprintf("Version must be %d or greater", MIN_PEER_PROTO_VERSION));
pfrom->fDisconnect = true; pfrom->fDisconnect = true;
return false; return false;
@ -4346,7 +4346,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
UpdatePreferredDownload(pfrom, State(pfrom->GetId())); UpdatePreferredDownload(pfrom, State(pfrom->GetId()));
// Change version // Change version
pfrom->PushMessage("verack"); pfrom->PushMessage(NetMsgType::VERACK);
pfrom->ssSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION)); pfrom->ssSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
if (!pfrom->fInbound) if (!pfrom->fInbound)
@ -4369,7 +4369,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// Get recent addresses // Get recent addresses
if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000) if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000)
{ {
pfrom->PushMessage("getaddr"); pfrom->PushMessage(NetMsgType::GETADDR);
pfrom->fGetAddr = true; pfrom->fGetAddr = true;
} }
addrman.Good(pfrom->addr); addrman.Good(pfrom->addr);
@ -4413,7 +4413,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "verack") else if (strCommand == NetMsgType::VERACK)
{ {
pfrom->SetRecvVersion(min(pfrom->nVersion, PROTOCOL_VERSION)); pfrom->SetRecvVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
@ -4428,12 +4428,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// We send this to non-NODE NETWORK peers as well, because even // We send this to non-NODE NETWORK peers as well, because even
// non-NODE NETWORK peers can announce blocks (such as pruning // non-NODE NETWORK peers can announce blocks (such as pruning
// nodes) // nodes)
pfrom->PushMessage("sendheaders"); pfrom->PushMessage(NetMsgType::SENDHEADERS);
} }
} }
else if (strCommand == "addr") else if (strCommand == NetMsgType::ADDR)
{ {
vector<CAddress> vAddr; vector<CAddress> vAddr;
vRecv >> vAddr; vRecv >> vAddr;
@ -4499,14 +4499,14 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
pfrom->fDisconnect = true; pfrom->fDisconnect = true;
} }
else if (strCommand == "sendheaders") else if (strCommand == NetMsgType::SENDHEADERS)
{ {
LOCK(cs_main); LOCK(cs_main);
State(pfrom->GetId())->fPreferHeaders = true; State(pfrom->GetId())->fPreferHeaders = true;
} }
else if (strCommand == "inv") else if (strCommand == NetMsgType::INV)
{ {
vector<CInv> vInv; vector<CInv> vInv;
vRecv >> vInv; vRecv >> vInv;
@ -4547,7 +4547,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// time the block arrives, the header chain leading up to it is already validated. Not // time the block arrives, the header chain leading up to it is already validated. Not
// doing this will result in the received block being rejected as an orphan in case it is // doing this will result in the received block being rejected as an orphan in case it is
// not a direct successor. // not a direct successor.
pfrom->PushMessage("getheaders", chainActive.GetLocator(pindexBestHeader), inv.hash); pfrom->PushMessage(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexBestHeader), inv.hash);
CNodeState *nodestate = State(pfrom->GetId()); CNodeState *nodestate = State(pfrom->GetId());
if (CanDirectFetch(chainparams.GetConsensus()) && if (CanDirectFetch(chainparams.GetConsensus()) &&
nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) { nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
@ -4577,11 +4577,11 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
if (!vToFetch.empty()) if (!vToFetch.empty())
pfrom->PushMessage("getdata", vToFetch); pfrom->PushMessage(NetMsgType::GETDATA, vToFetch);
} }
else if (strCommand == "getdata") else if (strCommand == NetMsgType::GETDATA)
{ {
vector<CInv> vInv; vector<CInv> vInv;
vRecv >> vInv; vRecv >> vInv;
@ -4602,7 +4602,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "getblocks") else if (strCommand == NetMsgType::GETBLOCKS)
{ {
CBlockLocator locator; CBlockLocator locator;
uint256 hashStop; uint256 hashStop;
@ -4646,7 +4646,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "getheaders") else if (strCommand == NetMsgType::GETHEADERS)
{ {
CBlockLocator locator; CBlockLocator locator;
uint256 hashStop; uint256 hashStop;
@ -4691,11 +4691,11 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// headers message). In both cases it's safe to update // headers message). In both cases it's safe to update
// pindexBestHeaderSent to be our tip. // pindexBestHeaderSent to be our tip.
nodestate->pindexBestHeaderSent = pindex ? pindex : chainActive.Tip(); nodestate->pindexBestHeaderSent = pindex ? pindex : chainActive.Tip();
pfrom->PushMessage("headers", vHeaders); pfrom->PushMessage(NetMsgType::HEADERS, vHeaders);
} }
else if (strCommand == "tx") else if (strCommand == NetMsgType::TX)
{ {
// Stop processing the transaction early if // Stop processing the transaction early if
// We are in blocks only mode and peer is either not whitelisted or whitelistalwaysrelay is off // We are in blocks only mode and peer is either not whitelisted or whitelistalwaysrelay is off
@ -4824,7 +4824,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
pfrom->id, pfrom->id,
FormatStateMessage(state)); FormatStateMessage(state));
if (state.GetRejectCode() < REJECT_INTERNAL) // Never send AcceptToMemoryPool's internal codes over P2P if (state.GetRejectCode() < REJECT_INTERNAL) // Never send AcceptToMemoryPool's internal codes over P2P
pfrom->PushMessage("reject", strCommand, (unsigned char)state.GetRejectCode(), pfrom->PushMessage(NetMsgType::REJECT, strCommand, (unsigned char)state.GetRejectCode(),
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash); state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
if (nDoS > 0) if (nDoS > 0)
Misbehaving(pfrom->GetId(), nDoS); Misbehaving(pfrom->GetId(), nDoS);
@ -4833,7 +4833,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "headers" && !fImporting && !fReindex) // Ignore headers received while importing else if (strCommand == NetMsgType::HEADERS && !fImporting && !fReindex) // Ignore headers received while importing
{ {
std::vector<CBlockHeader> headers; std::vector<CBlockHeader> headers;
@ -4881,7 +4881,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// TODO: optimize: if pindexLast is an ancestor of chainActive.Tip or pindexBestHeader, continue // TODO: optimize: if pindexLast is an ancestor of chainActive.Tip or pindexBestHeader, continue
// from there instead. // from there instead.
LogPrint("net", "more getheaders (%d) to end to peer=%d (startheight:%d)\n", pindexLast->nHeight, pfrom->id, pfrom->nStartingHeight); LogPrint("net", "more getheaders (%d) to end to peer=%d (startheight:%d)\n", pindexLast->nHeight, pfrom->id, pfrom->nStartingHeight);
pfrom->PushMessage("getheaders", chainActive.GetLocator(pindexLast), uint256()); pfrom->PushMessage(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexLast), uint256());
} }
bool fCanDirectFetch = CanDirectFetch(chainparams.GetConsensus()); bool fCanDirectFetch = CanDirectFetch(chainparams.GetConsensus());
@ -4926,7 +4926,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
pindexLast->GetBlockHash().ToString(), pindexLast->nHeight); pindexLast->GetBlockHash().ToString(), pindexLast->nHeight);
} }
if (vGetData.size() > 0) { if (vGetData.size() > 0) {
pfrom->PushMessage("getdata", vGetData); pfrom->PushMessage(NetMsgType::GETDATA, vGetData);
} }
} }
} }
@ -4934,7 +4934,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
CheckBlockIndex(chainparams.GetConsensus()); CheckBlockIndex(chainparams.GetConsensus());
} }
else if (strCommand == "block" && !fImporting && !fReindex) // Ignore blocks received while importing else if (strCommand == NetMsgType::BLOCK && !fImporting && !fReindex) // Ignore blocks received while importing
{ {
CBlock block; CBlock block;
vRecv >> block; vRecv >> block;
@ -4954,7 +4954,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
int nDoS; int nDoS;
if (state.IsInvalid(nDoS)) { if (state.IsInvalid(nDoS)) {
assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
pfrom->PushMessage("reject", strCommand, (unsigned char)state.GetRejectCode(), pfrom->PushMessage(NetMsgType::REJECT, strCommand, (unsigned char)state.GetRejectCode(),
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash); state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
if (nDoS > 0) { if (nDoS > 0) {
LOCK(cs_main); LOCK(cs_main);
@ -4970,7 +4970,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// to users' AddrMan and later request them by sending getaddr messages. // to users' AddrMan and later request them by sending getaddr messages.
// Making nodes which are behind NAT and can only make outgoing connections ignore // Making nodes which are behind NAT and can only make outgoing connections ignore
// the getaddr message mitigates the attack. // the getaddr message mitigates the attack.
else if ((strCommand == "getaddr") && (pfrom->fInbound)) else if ((strCommand == NetMsgType::GETADDR) && (pfrom->fInbound))
{ {
pfrom->vAddrToSend.clear(); pfrom->vAddrToSend.clear();
vector<CAddress> vAddr = addrman.GetAddr(); vector<CAddress> vAddr = addrman.GetAddr();
@ -4979,7 +4979,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "mempool") else if (strCommand == NetMsgType::MEMPOOL)
{ {
if (CNode::OutboundTargetReached(false) && !pfrom->fWhitelisted) if (CNode::OutboundTargetReached(false) && !pfrom->fWhitelisted)
{ {
@ -5002,16 +5002,16 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
vInv.push_back(inv); vInv.push_back(inv);
if (vInv.size() == MAX_INV_SZ) { if (vInv.size() == MAX_INV_SZ) {
pfrom->PushMessage("inv", vInv); pfrom->PushMessage(NetMsgType::INV, vInv);
vInv.clear(); vInv.clear();
} }
} }
if (vInv.size() > 0) if (vInv.size() > 0)
pfrom->PushMessage("inv", vInv); pfrom->PushMessage(NetMsgType::INV, vInv);
} }
else if (strCommand == "ping") else if (strCommand == NetMsgType::PING)
{ {
if (pfrom->nVersion > BIP0031_VERSION) if (pfrom->nVersion > BIP0031_VERSION)
{ {
@ -5028,12 +5028,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// it, if the remote node sends a ping once per second and this node takes 5 // it, if the remote node sends a ping once per second and this node takes 5
// seconds to respond to each, the 5th ping the remote sends would appear to // seconds to respond to each, the 5th ping the remote sends would appear to
// return very quickly. // return very quickly.
pfrom->PushMessage("pong", nonce); pfrom->PushMessage(NetMsgType::PONG, nonce);
} }
} }
else if (strCommand == "pong") else if (strCommand == NetMsgType::PONG)
{ {
int64_t pingUsecEnd = nTimeReceived; int64_t pingUsecEnd = nTimeReceived;
uint64_t nonce = 0; uint64_t nonce = 0;
@ -5090,7 +5090,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (fAlerts && strCommand == "alert") else if (fAlerts && strCommand == NetMsgType::ALERT)
{ {
CAlert alert; CAlert alert;
vRecv >> alert; vRecv >> alert;
@ -5121,7 +5121,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "filterload") else if (strCommand == NetMsgType::FILTERLOAD)
{ {
CBloomFilter filter; CBloomFilter filter;
vRecv >> filter; vRecv >> filter;
@ -5140,7 +5140,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "filteradd") else if (strCommand == NetMsgType::FILTERADD)
{ {
vector<unsigned char> vData; vector<unsigned char> vData;
vRecv >> vData; vRecv >> vData;
@ -5160,7 +5160,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "filterclear") else if (strCommand == NetMsgType::FILTERCLEAR)
{ {
LOCK(pfrom->cs_filter); LOCK(pfrom->cs_filter);
delete pfrom->pfilter; delete pfrom->pfilter;
@ -5169,7 +5169,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
else if (strCommand == "reject") else if (strCommand == NetMsgType::REJECT)
{ {
if (fDebug) { if (fDebug) {
try { try {
@ -5179,7 +5179,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
ostringstream ss; ostringstream ss;
ss << strMsg << " code " << itostr(ccode) << ": " << strReason; ss << strMsg << " code " << itostr(ccode) << ": " << strReason;
if (strMsg == "block" || strMsg == "tx") if (strMsg == NetMsgType::BLOCK || strMsg == NetMsgType::TX)
{ {
uint256 hash; uint256 hash;
vRecv >> hash; vRecv >> hash;
@ -5287,7 +5287,7 @@ bool ProcessMessages(CNode* pfrom)
} }
catch (const std::ios_base::failure& e) catch (const std::ios_base::failure& e)
{ {
pfrom->PushMessage("reject", strCommand, REJECT_MALFORMED, string("error parsing message")); pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_MALFORMED, string("error parsing message"));
if (strstr(e.what(), "end of data")) if (strstr(e.what(), "end of data"))
{ {
// Allow exceptions from under-length message on vRecv // Allow exceptions from under-length message on vRecv
@ -5355,11 +5355,11 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
pto->nPingUsecStart = GetTimeMicros(); pto->nPingUsecStart = GetTimeMicros();
if (pto->nVersion > BIP0031_VERSION) { if (pto->nVersion > BIP0031_VERSION) {
pto->nPingNonceSent = nonce; pto->nPingNonceSent = nonce;
pto->PushMessage("ping", nonce); pto->PushMessage(NetMsgType::PING, nonce);
} else { } else {
// Peer is too old to support ping command with nonce, pong will never arrive. // Peer is too old to support ping command with nonce, pong will never arrive.
pto->nPingNonceSent = 0; pto->nPingNonceSent = 0;
pto->PushMessage("ping"); pto->PushMessage(NetMsgType::PING);
} }
} }
@ -5401,14 +5401,14 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
// receiver rejects addr messages larger than 1000 // receiver rejects addr messages larger than 1000
if (vAddr.size() >= 1000) if (vAddr.size() >= 1000)
{ {
pto->PushMessage("addr", vAddr); pto->PushMessage(NetMsgType::ADDR, vAddr);
vAddr.clear(); vAddr.clear();
} }
} }
} }
pto->vAddrToSend.clear(); pto->vAddrToSend.clear();
if (!vAddr.empty()) if (!vAddr.empty())
pto->PushMessage("addr", vAddr); pto->PushMessage(NetMsgType::ADDR, vAddr);
} }
CNodeState &state = *State(pto->GetId()); CNodeState &state = *State(pto->GetId());
@ -5428,7 +5428,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
} }
BOOST_FOREACH(const CBlockReject& reject, state.rejects) BOOST_FOREACH(const CBlockReject& reject, state.rejects)
pto->PushMessage("reject", (string)"block", reject.chRejectCode, reject.strRejectReason, reject.hashBlock); pto->PushMessage(NetMsgType::REJECT, (string)NetMsgType::BLOCK, reject.chRejectCode, reject.strRejectReason, reject.hashBlock);
state.rejects.clear(); state.rejects.clear();
// Start block sync // Start block sync
@ -5451,7 +5451,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
if (pindexStart->pprev) if (pindexStart->pprev)
pindexStart = pindexStart->pprev; pindexStart = pindexStart->pprev;
LogPrint("net", "initial getheaders (%d) to peer=%d (startheight:%d)\n", pindexStart->nHeight, pto->id, pto->nStartingHeight); LogPrint("net", "initial getheaders (%d) to peer=%d (startheight:%d)\n", pindexStart->nHeight, pto->id, pto->nStartingHeight);
pto->PushMessage("getheaders", chainActive.GetLocator(pindexStart), uint256()); pto->PushMessage(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexStart), uint256());
} }
} }
@ -5551,7 +5551,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
LogPrint("net", "%s: sending header %s to peer=%d\n", __func__, LogPrint("net", "%s: sending header %s to peer=%d\n", __func__,
vHeaders.front().GetHash().ToString(), pto->id); vHeaders.front().GetHash().ToString(), pto->id);
} }
pto->PushMessage("headers", vHeaders); pto->PushMessage(NetMsgType::HEADERS, vHeaders);
state.pindexBestHeaderSent = pBestIndex; state.pindexBestHeaderSent = pBestIndex;
} }
pto->vBlockHashesToAnnounce.clear(); pto->vBlockHashesToAnnounce.clear();
@ -5594,14 +5594,14 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
vInv.push_back(inv); vInv.push_back(inv);
if (vInv.size() >= 1000) if (vInv.size() >= 1000)
{ {
pto->PushMessage("inv", vInv); pto->PushMessage(NetMsgType::INV, vInv);
vInv.clear(); vInv.clear();
} }
} }
pto->vInventoryToSend = vInvWait; pto->vInventoryToSend = vInvWait;
} }
if (!vInv.empty()) if (!vInv.empty())
pto->PushMessage("inv", vInv); pto->PushMessage(NetMsgType::INV, vInv);
// Detect whether we're stalling // Detect whether we're stalling
int64_t nNow = GetTimeMicros(); int64_t nNow = GetTimeMicros();
@ -5670,7 +5670,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
vGetData.push_back(inv); vGetData.push_back(inv);
if (vGetData.size() >= 1000) if (vGetData.size() >= 1000)
{ {
pto->PushMessage("getdata", vGetData); pto->PushMessage(NetMsgType::GETDATA, vGetData);
vGetData.clear(); vGetData.clear();
} }
} else { } else {
@ -5680,7 +5680,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
pto->mapAskFor.erase(pto->mapAskFor.begin()); pto->mapAskFor.erase(pto->mapAskFor.begin());
} }
if (!vGetData.empty()) if (!vGetData.empty())
pto->PushMessage("getdata", vGetData); pto->PushMessage(NetMsgType::GETDATA, vGetData);
} }
return true; return true;

2
src/net.cpp
View File

@ -459,7 +459,7 @@ void CNode::PushVersion()
LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id); LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id);
else else
LogPrint("net", "send version message: version %d, blocks=%d, us=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), id); LogPrint("net", "send version message: version %d, blocks=%d, us=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), id);
PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe, PushMessage(NetMsgType::VERSION, PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
nLocalHostNonce, strSubVersion, nBestHeight, !GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY)); nLocalHostNonce, strSubVersion, nBestHeight, !GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY));
} }

67
src/protocol.cpp
View File

@ -12,14 +12,68 @@
# include <arpa/inet.h> # include <arpa/inet.h>
#endif #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";
};
static const char* ppszTypeName[] = static const char* ppszTypeName[] =
{ {
"ERROR", "ERROR", // Should never occur
"tx", NetMsgType::TX,
"block", NetMsgType::BLOCK,
"filtered block" "filtered block" // Should never occur
}; };
/** 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
};
const static std::vector<std::string> allNetMessageTypesVec(allNetMessageTypes, allNetMessageTypes+ARRAYLEN(allNetMessageTypes));
CMessageHeader::CMessageHeader(const MessageStartChars& pchMessageStartIn) CMessageHeader::CMessageHeader(const MessageStartChars& pchMessageStartIn)
{ {
memcpy(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE); memcpy(pchMessageStart, pchMessageStartIn, MESSAGE_START_SIZE);
@ -140,3 +194,8 @@ std::string CInv::ToString() const
{ {
return strprintf("%s %s", GetCommand(), hash.ToString()); return strprintf("%s %s", GetCommand(), hash.ToString());
} }
const std::vector<std::string> &getAllNetMessageTypes()
{
return allNetMessageTypesVec;
}

159
src/protocol.h
View File

@ -65,6 +65,165 @@ public:
unsigned int nChecksum; unsigned int nChecksum;
}; };
/**
* Bitcoin protocol message types. When adding new message types, don't forget
* to update allNetMessageTypes in protocol.cpp.
*/
namespace NetMsgType {
/**
* The version message provides information about the transmitting node to the
* receiving node at the beginning of a connection.
* @see https://bitcoin.org/en/developer-reference#version
*/
extern const char *VERSION;
/**
* The verack message acknowledges a previously-received version message,
* informing the connecting node that it can begin to send other messages.
* @see https://bitcoin.org/en/developer-reference#verack
*/
extern const char *VERACK;
/**
* The addr (IP address) message relays connection information for peers on the
* network.
* @see https://bitcoin.org/en/developer-reference#addr
*/
extern const char *ADDR;
/**
* The inv message (inventory message) transmits one or more inventories of
* objects known to the transmitting peer.
* @see https://bitcoin.org/en/developer-reference#inv
*/
extern const char *INV;
/**
* The getdata message requests one or more data objects from another node.
* @see https://bitcoin.org/en/developer-reference#getdata
*/
extern const char *GETDATA;
/**
* The merkleblock message is a reply to a getdata message which requested a
* block using the inventory type MSG_MERKLEBLOCK.
* @since protocol version 70001 as described by BIP37.
* @see https://bitcoin.org/en/developer-reference#merkleblock
*/
extern const char *MERKLEBLOCK;
/**
* The getblocks message requests an inv message that provides block header
* hashes starting from a particular point in the block chain.
* @see https://bitcoin.org/en/developer-reference#getblocks
*/
extern const char *GETBLOCKS;
/**
* The getheaders message requests a headers message that provides block
* headers starting from a particular point in the block chain.
* @since protocol version 31800.
* @see https://bitcoin.org/en/developer-reference#getheaders
*/
extern const char *GETHEADERS;
/**
* The tx message transmits a single transaction.
* @see https://bitcoin.org/en/developer-reference#tx
*/
extern const char *TX;
/**
* The headers message sends one or more block headers to a node which
* previously requested certain headers with a getheaders message.
* @since protocol version 31800.
* @see https://bitcoin.org/en/developer-reference#headers
*/
extern const char *HEADERS;
/**
* The block message transmits a single serialized block.
* @see https://bitcoin.org/en/developer-reference#block
*/
extern const char *BLOCK;
/**
* The getaddr message requests an addr message from the receiving node,
* preferably one with lots of IP addresses of other receiving nodes.
* @see https://bitcoin.org/en/developer-reference#getaddr
*/
extern const char *GETADDR;
/**
* The mempool message requests the TXIDs of transactions that the receiving
* node has verified as valid but which have not yet appeared in a block.
* @since protocol version 60002.
* @see https://bitcoin.org/en/developer-reference#mempool
*/
extern const char *MEMPOOL;
/**
* The ping message is sent periodically to help confirm that the receiving
* peer is still connected.
* @see https://bitcoin.org/en/developer-reference#ping
*/
extern const char *PING;
/**
* The pong message replies to a ping message, proving to the pinging node that
* the ponging node is still alive.
* @since protocol version 60001 as described by BIP31.
* @see https://bitcoin.org/en/developer-reference#pong
*/
extern const char *PONG;
/**
* The alert message warns nodes of problems that may affect them or the rest
* of the network.
* @since protocol version 311.
* @see https://bitcoin.org/en/developer-reference#alert
*/
extern const char *ALERT;
/**
* The notfound message is a reply to a getdata message which requested an
* object the receiving node does not have available for relay.
* @ince protocol version 70001.
* @see https://bitcoin.org/en/developer-reference#notfound
*/
extern const char *NOTFOUND;
/**
* The filterload message tells the receiving peer to filter all relayed
* transactions and requested merkle blocks through the provided filter.
* @since protocol version 70001 as described by BIP37.
* Only available with service bit NODE_BLOOM since protocol version
* 70011 as described by BIP111.
* @see https://bitcoin.org/en/developer-reference#filterload
*/
extern const char *FILTERLOAD;
/**
* The filteradd message tells the receiving peer to add a single element to a
* previously-set bloom filter, such as a new public key.
* @since protocol version 70001 as described by BIP37.
* Only available with service bit NODE_BLOOM since protocol version
* 70011 as described by BIP111.
* @see https://bitcoin.org/en/developer-reference#filteradd
*/
extern const char *FILTERADD;
/**
* The filterclear message tells the receiving peer to remove a previously-set
* bloom filter.
* @since protocol version 70001 as described by BIP37.
* Only available with service bit NODE_BLOOM since protocol version
* 70011 as described by BIP111.
* @see https://bitcoin.org/en/developer-reference#filterclear
*/
extern const char *FILTERCLEAR;
/**
* The reject message informs the receiving node that one of its previous
* messages has been rejected.
* @since protocol version 70002 as described by BIP61.
* @see https://bitcoin.org/en/developer-reference#reject
*/
extern const char *REJECT;
/**
* Indicates that a node prefers to receive new block announcements via a
* "headers" message rather than an "inv".
* @since protocol version 70012 as described by BIP130.
* @see https://bitcoin.org/en/developer-reference#sendheaders
*/
extern const char *SENDHEADERS;
};
/* Get a vector of all valid message types (see above) */
const std::vector<std::string> &getAllNetMessageTypes();
/** nServices flags */ /** nServices flags */
enum { enum {
// NODE_NETWORK means that the node is capable of serving the block chain. It is currently // NODE_NETWORK means that the node is capable of serving the block chain. It is currently