Add NODE_BLOOM service bit and bump protocol version
Lets nodes advertise that they offer bloom filter support explicitly. The protocol version bump allows SPV nodes to assume that NODE_BLOOM is set if NODE_NETWORK is set for pre-170004 nodes. Also adds an option to turn bloom filter support off for nodes which advertise a version number >= 170004. Nodes attempting to use bloom filters on such protocol versions are banned, and a later upgade should drop nodes of an older version which attempt to use bloom filters. Much code stolen from Peter Todd. Zcash: Implements Zcash equivalent of BIP 111; deploys with Overwinter
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@ -1025,6 +1025,9 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
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// Option to startup with mocktime set (used for regression testing):
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SetMockTime(GetArg("-mocktime", 0)); // SetMockTime(0) is a no-op
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if (GetBoolArg("-peerbloomfilters", true))
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nLocalServices |= NODE_BLOOM;
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#ifdef ENABLE_MINING
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if (mapArgs.count("-mineraddress")) {
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CBitcoinAddress addr;
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15
src/main.cpp
15
src/main.cpp
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@ -5498,6 +5498,21 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
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}
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else if (!(nLocalServices & NODE_BLOOM) &&
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(strCommand == "filterload" ||
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strCommand == "filteradd" ||
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strCommand == "filterclear") &&
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//TODO: Remove this line after reasonable network upgrade
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pfrom->nVersion >= NO_BLOOM_VERSION)
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{
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if (pfrom->nVersion >= NO_BLOOM_VERSION)
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Misbehaving(pfrom->GetId(), 100);
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//TODO: Enable this after reasonable network upgrade
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//else
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// pfrom->fDisconnect = true;
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}
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else if (strCommand == "filterload")
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{
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CBloomFilter filter;
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@ -71,6 +71,10 @@ enum {
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// set by all Bitcoin Core nodes, and is unset by SPV clients or other peers that just want
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// network services but don't provide them.
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NODE_NETWORK = (1 << 0),
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// NODE_BLOOM means the node is capable and willing to handle bloom-filtered connections.
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// Zcash nodes used to support this by default, without advertising this bit,
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// but no longer do as of protocol version 170004 (= NO_BLOOM_VERSION)
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NODE_BLOOM = (1 << 2),
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// Bits 24-31 are reserved for temporary experiments. Just pick a bit that
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// isn't getting used, or one not being used much, and notify the
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@ -9,7 +9,7 @@
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* network protocol versioning
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*/
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static const int PROTOCOL_VERSION = 170003;
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static const int PROTOCOL_VERSION = 170004;
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//! initial proto version, to be increased after version/verack negotiation
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static const int INIT_PROTO_VERSION = 209;
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@ -30,4 +30,7 @@ static const int BIP0031_VERSION = 60000;
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//! "mempool" command, enhanced "getdata" behavior starts with this version
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static const int MEMPOOL_GD_VERSION = 60002;
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//! "filter*" commands are disabled without NODE_BLOOM after and including this version
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static const int NO_BLOOM_VERSION = 170004;
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#endif // BITCOIN_VERSION_H
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