fix !O_NONBLOCK where ~O_NONBLOCK was meant

Using ! on a non-zero value will always return 0.

Also remove some duplicate and superfluous code in other places.

src/netbase.cpp

@@ -72,19 +72,14 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign
 
     aiHint.ai_socktype = SOCK_STREAM;
     aiHint.ai_protocol = IPPROTO_TCP;
-#ifdef WIN32
+#ifdef USE_IPV6
-#  ifdef USE_IPV6
     aiHint.ai_family = AF_UNSPEC;
-#  else
+#else
     aiHint.ai_family = AF_INET;
-#  endif
+#endif
+#ifdef WIN32
     aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
 #else
-#  ifdef USE_IPV6
-    aiHint.ai_family = AF_UNSPEC;
-#  else
-    aiHint.ai_family = AF_INET;
-#  endif
     aiHint.ai_flags = fAllowLookup ? AI_ADDRCONFIG : AI_NUMERICHOST;
 #endif
     struct addrinfo *aiRes = NULL;
@@ -119,13 +114,12 @@ bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsign
 
 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
 {
-    std::string str(pszName);
+    std::string strHost(pszName);
-    std::string strHost = str;
+    if (strHost.empty())
-    if (str.empty())
         return false;
-    if (boost::algorithm::starts_with(str, "[") && boost::algorithm::ends_with(str, "]"))
+    if (boost::algorithm::starts_with(strHost, "[") && boost::algorithm::ends_with(strHost, "]"))
     {
-        strHost = str.substr(1, str.size() - 2);
+        strHost = strHost.substr(1, strHost.size() - 2);
     }
 
     return LookupIntern(strHost.c_str(), vIP, nMaxSolutions, fAllowLookup);
@@ -222,10 +216,9 @@ bool static Socks5(string strDest, int port, SOCKET& hSocket)
         return error("Hostname too long");
     }
     char pszSocks5Init[] = "\5\1\0";
-    char *pszSocks5 = pszSocks5Init;
     ssize_t nSize = sizeof(pszSocks5Init) - 1;
 
-    ssize_t ret = send(hSocket, pszSocks5, nSize, MSG_NOSIGNAL);
+    ssize_t ret = send(hSocket, pszSocks5Init, nSize, MSG_NOSIGNAL);
     if (ret != nSize)
     {
         closesocket(hSocket);
@@ -414,7 +407,7 @@ bool static ConnectSocketDirectly(const CService &addrConnect, SOCKET& hSocketRe
     if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
 #else
     fFlags = fcntl(hSocket, F_GETFL, 0);
-    if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
+    if (fcntl(hSocket, F_SETFL, fFlags & ~O_NONBLOCK) == SOCKET_ERROR)
 #endif
     {
         closesocket(hSocket);