diff options
| -rw-r--r-- | src/net_processing.cpp | 50 | ||||
| -rw-r--r-- | src/protocol.cpp | 4 | ||||
| -rw-r--r-- | src/protocol.h | 11 |
3 files changed, 65 insertions, 0 deletions
diff --git a/src/net_processing.cpp b/src/net_processing.cpp index cc5b4e4362..4536c737d1 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -129,6 +129,8 @@ static constexpr unsigned int INVENTORY_BROADCAST_MAX = 7 * INVENTORY_BROADCAST_ static constexpr unsigned int AVG_FEEFILTER_BROADCAST_INTERVAL = 10 * 60; /** Maximum feefilter broadcast delay after significant change. */ static constexpr unsigned int MAX_FEEFILTER_CHANGE_DELAY = 5 * 60; +/** Maximum number of compact filters that may be requested with one getcfilters. See BIP 157. */ +static constexpr uint32_t MAX_GETCFILTERS_SIZE = 1000; /** Maximum number of cf hashes that may be requested with one getcfheaders. See BIP 157. */ static constexpr uint32_t MAX_GETCFHEADERS_SIZE = 2000; @@ -2052,6 +2054,49 @@ static bool PrepareBlockFilterRequest(CNode& pfrom, const CChainParams& chain_pa } /** + * Handle a cfilters request. + * + * May disconnect from the peer in the case of a bad request. + * + * @param[in] pfrom The peer that we received the request from + * @param[in] vRecv The raw message received + * @param[in] chain_params Chain parameters + * @param[in] connman Pointer to the connection manager + */ +static void ProcessGetCFilters(CNode& pfrom, CDataStream& vRecv, const CChainParams& chain_params, + CConnman& connman) +{ + uint8_t filter_type_ser; + uint32_t start_height; + uint256 stop_hash; + + vRecv >> filter_type_ser >> start_height >> stop_hash; + + const BlockFilterType filter_type = static_cast<BlockFilterType>(filter_type_ser); + + const CBlockIndex* stop_index; + BlockFilterIndex* filter_index; + if (!PrepareBlockFilterRequest(pfrom, chain_params, filter_type, start_height, stop_hash, + MAX_GETCFILTERS_SIZE, stop_index, filter_index)) { + return; + } + + std::vector<BlockFilter> filters; + + if (!filter_index->LookupFilterRange(start_height, stop_index, filters)) { + LogPrint(BCLog::NET, "Failed to find block filter in index: filter_type=%s, start_height=%d, stop_hash=%s\n", + BlockFilterTypeName(filter_type), start_height, stop_hash.ToString()); + return; + } + + for (const auto& filter : filters) { + CSerializedNetMsg msg = CNetMsgMaker(pfrom.GetSendVersion()) + .Make(NetMsgType::CFILTER, filter); + connman.PushMessage(&pfrom, std::move(msg)); + } +} + +/** * Handle a cfheaders request. * * May disconnect from the peer in the case of a bad request. @@ -3466,6 +3511,11 @@ bool ProcessMessage(CNode* pfrom, const std::string& msg_type, CDataStream& vRec return true; } + if (msg_type == NetMsgType::GETCFILTERS) { + ProcessGetCFilters(*pfrom, vRecv, chainparams, *connman); + return true; + } + if (msg_type == NetMsgType::GETCFHEADERS) { ProcessGetCFHeaders(*pfrom, vRecv, chainparams, *connman); return true; diff --git a/src/protocol.cpp b/src/protocol.cpp index 243111c449..947f33c3df 100644 --- a/src/protocol.cpp +++ b/src/protocol.cpp @@ -40,6 +40,8 @@ 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"; @@ -75,6 +77,8 @@ const static std::string allNetMessageTypes[] = { NetMsgType::CMPCTBLOCK, NetMsgType::GETBLOCKTXN, NetMsgType::BLOCKTXN, + NetMsgType::GETCFILTERS, + NetMsgType::CFILTER, NetMsgType::GETCFHEADERS, NetMsgType::CFHEADERS, NetMsgType::GETCFCHECKPT, diff --git a/src/protocol.h b/src/protocol.h index 9527dce960..f61b724b74 100644 --- a/src/protocol.h +++ b/src/protocol.h @@ -226,6 +226,17 @@ extern const char* GETBLOCKTXN; */ extern const char* BLOCKTXN; /** + * getcfilters requests compact filters for a range of blocks. + * Only available with service bit NODE_COMPACT_FILTERS as described by + * BIP 157 & 158. + */ +extern const char* GETCFILTERS; +/** + * cfilter is a response to a getcfilters request containing a single compact + * filter. + */ +extern const char* CFILTER; +/** * getcfheaders requests a compact filter header and the filter hashes for a * range of blocks, which can then be used to reconstruct the filter headers * for those blocks. |