diff options
| -rw-r--r-- | src/net.cpp | 1 | ||||
| -rw-r--r-- | src/net.h | 14 | ||||
| -rw-r--r-- | src/net_processing.cpp | 3 |
3 files changed, 8 insertions, 10 deletions
diff --git a/src/net.cpp b/src/net.cpp index ccab4a1718..1335804b06 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -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>(); @@ -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. diff --git a/src/net_processing.cpp b/src/net_processing.cpp index 0247b9cc7e..cd3dd85aa3 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -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; |