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Limit message sizes before transfer

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This introduces a fixed limit for the size of p2p messages, and enforces it
before download.

Rebased-From: ba04c4a780
Github-Pull: #5843
This commit is contained in:
Pieter Wuille 2015-03-05 04:01:22 -08:00 committed by Ross Nicoll
parent c118e9d275
commit fe3a31384c
2 changed files with 7 additions and 0 deletions
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5
src/net.cpp
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@ -666,6 +666,11 @@ bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes)
if (handled < 0)
return false;
if (msg.in_data && msg.hdr.nMessageSize > MAX_PROTOCOL_MESSAGE_LENGTH) {
LogPrint("net", "Oversized message from peer=%i, disconnecting", GetId());
return false;
}
pch += handled;
nBytes -= handled;

2
src/net.h
View file

@ -43,6 +43,8 @@ static const int PING_INTERVAL = 2 * 60;
static const int TIMEOUT_INTERVAL = 20 * 60;
/** The maximum number of entries in an 'inv' protocol message */
static const unsigned int MAX_INV_SZ = 50000;
/** Maximum length of incoming protocol messages (no message over 2 MiB is currently acceptable). */
static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 2 * 1024 * 1024;
/** The maximum number of entries in mapAskFor */
static const size_t MAPASKFOR_MAX_SZ = MAX_INV_SZ;