diff options
| -rw-r--r-- | src/net.h | 2 | ||||
| -rw-r--r-- | src/net_processing.cpp | 12 |
2 files changed, 14 insertions, 0 deletions
@@ -45,6 +45,8 @@ static const int TIMEOUT_INTERVAL = 20 * 60; static const int FEELER_INTERVAL = 120; /** The maximum number of entries in an 'inv' protocol message */ static const unsigned int MAX_INV_SZ = 50000; +/** The maximum number of entries in a locator */ +static const unsigned int MAX_LOCATOR_SZ = 101; /** The maximum number of new addresses to accumulate before announcing. */ static const unsigned int MAX_ADDR_TO_SEND = 1000; /** Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable). */ diff --git a/src/net_processing.cpp b/src/net_processing.cpp index d5d664b27e..eaa2fb3dfd 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -2018,6 +2018,12 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr uint256 hashStop; vRecv >> locator >> hashStop; + if (locator.vHave.size() > MAX_LOCATOR_SZ) { + LogPrint(BCLog::NET, "getblocks locator size %lld > %d, disconnect peer=%d\n", locator.vHave.size(), MAX_LOCATOR_SZ, pfrom->GetId()); + pfrom->fDisconnect = true; + return true; + } + // We might have announced the currently-being-connected tip using a // compact block, which resulted in the peer sending a getblocks // request, which we would otherwise respond to without the new block. @@ -2131,6 +2137,12 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr uint256 hashStop; vRecv >> locator >> hashStop; + if (locator.vHave.size() > MAX_LOCATOR_SZ) { + LogPrint(BCLog::NET, "getheaders locator size %lld > %d, disconnect peer=%d\n", locator.vHave.size(), MAX_LOCATOR_SZ, pfrom->GetId()); + pfrom->fDisconnect = true; + return true; + } + LOCK(cs_main); if (IsInitialBlockDownload() && !pfrom->fWhitelisted) { LogPrint(BCLog::NET, "Ignoring getheaders from peer=%d because node is in initial block download\n", pfrom->GetId()); |