Fix #626: RecvLine wrong error message

Also moved RecvLine to net.cpp.

src/net.cpp

@@ -83,6 +83,57 @@ void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
 
 
 
+bool RecvLine(SOCKET hSocket, string& strLine)
+{
+    strLine = "";
+    loop
+    {
+        char c;
+        int nBytes = recv(hSocket, &c, 1, 0);
+        if (nBytes > 0)
+        {
+            if (c == '\n')
+                continue;
+            if (c == '\r')
+                return true;
+            strLine += c;
+            if (strLine.size() >= 9000)
+                return true;
+        }
+        else if (nBytes <= 0)
+        {
+            if (fShutdown)
+                return false;
+            if (nBytes < 0)
+            {
+                int nErr = WSAGetLastError();
+                if (nErr == WSAEMSGSIZE)
+                    continue;
+                if (nErr == WSAEWOULDBLOCK || nErr == WSAEINTR || nErr == WSAEINPROGRESS)
+                {
+                    Sleep(10);
+                    continue;
+                }
+            }
+            if (!strLine.empty())
+                return true;
+            if (nBytes == 0)
+            {
+                // socket closed
+                printf("socket closed\n");
+                return false;
+            }
+            else
+            {
+                // socket error
+                int nErr = WSAGetLastError();
+                printf("recv failed: %d\n", nErr);
+                return false;
+            }
+        }
+    }
+}
+
 
 
 bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& ipRet)