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net: Remove unused unsanitized user agent string CNode::strSubVer

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This commit is contained in:
MarcoFalke 2019-03-23 11:34:40 -04:00
parent 7b13c64645
commit fa8548c5d1
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GPG Key ID: CE2B75697E69A548
3 changed files with 8 additions and 10 deletions
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1
src/net.cpp
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@ -2627,7 +2627,6 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
{
hSocket = hSocketIn;
addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
strSubVer = "";
hashContinue = uint256();
filterInventoryKnown.reset();
pfilter = MakeUnique<CBloomFilter>();

14
src/net.h
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@ -53,7 +53,7 @@ static const unsigned int MAX_LOCATOR_SZ = 101;
static const unsigned int MAX_ADDR_TO_SEND = 1000;
/** Maximum length of incoming protocol messages (no message over 4 MB is currently acceptable). */
static const unsigned int MAX_PROTOCOL_MESSAGE_LENGTH = 4 * 1000 * 1000;
/** Maximum length of strSubVer in `version` message */
/** Maximum length of the user agent string in `version` message */
static const unsigned int MAX_SUBVERSION_LENGTH = 256;
/** Maximum number of automatic outgoing nodes */
static const int MAX_OUTBOUND_CONNECTIONS = 8;
@ -650,12 +650,12 @@ public:
// Bind address of our side of the connection
const CAddress addrBind;
std::atomic<int> nVersion{0};
// strSubVer is whatever byte array we read from the wire. However, this field is intended
// to be printed out, displayed to humans in various forms and so on. So we sanitize it and
// store the sanitized version in cleanSubVer. The original should be used when dealing with
// the network or wire types and the cleaned string used when displayed or logged.
std::string strSubVer GUARDED_BY(cs_SubVer), cleanSubVer GUARDED_BY(cs_SubVer);
CCriticalSection cs_SubVer; // used for both cleanSubVer and strSubVer
RecursiveMutex cs_SubVer;
/**
* cleanSubVer is a sanitized string of the user agent byte array we read
* from the wire. This cleaned string can safely be logged or displayed.
*/
std::string cleanSubVer GUARDED_BY(cs_SubVer){};
bool m_prefer_evict{false}; // This peer is preferred for eviction.
bool fWhitelisted{false}; // This peer can bypass DoS banning.
bool fFeeler{false}; // If true this node is being used as a short lived feeler.

3
src/net_processing.cpp
View File

@ -1782,7 +1782,6 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
ServiceFlags nServices;
int nVersion;
int nSendVersion;
std::string strSubVer;
std::string cleanSubVer;
int nStartingHeight = -1;
bool fRelay = true;
@ -1819,6 +1818,7 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
if (!vRecv.empty())
vRecv >> addrFrom >> nNonce;
if (!vRecv.empty()) {
std::string strSubVer;
vRecv >> LIMITED_STRING(strSubVer, MAX_SUBVERSION_LENGTH);
cleanSubVer = SanitizeString(strSubVer);
}
@ -1850,7 +1850,6 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
pfrom->SetAddrLocal(addrMe);
{
LOCK(pfrom->cs_SubVer);
pfrom->strSubVer = strSubVer;
pfrom->cleanSubVer = cleanSubVer;
}
pfrom->nStartingHeight = nStartingHeight;