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-rw-r--r--src/net_processing.cpp50
-rw-r--r--src/protocol.cpp4
-rw-r--r--src/protocol.h11
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.