diff options
Diffstat (limited to 'src/net_processing.cpp')
| -rw-r--r-- | src/net_processing.cpp | 50 |
1 files changed, 50 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; |