Check for null HostAddr in mlfi_connect.

git-svn-id: https://svn.microneil.com/svn/SNFMilter/trunk@12 2c985dca-31e6-41a4-b4a2-d8f5b7f8e074

SNFMilter.cpp

             sockaddr_in *SaIn = (sockaddr_in *) HostAddr;                       // Fetch the IP address.
 
             Context->ConnectionData.HostName = HostName;                        // Load the info.
-            Context->ConnectionData.HostIP = ntohl(SaIn->sin_addr.s_addr);
+
+	    if (0 == SaIn) {                                                    // If HostAddr is 0...
+
+		Context->ConnectionData.HostIP = "127.0.0.1";                   // Set to a valid value.
+
+	    } else {
+
+		Context->ConnectionData.HostIP = ntohl(SaIn->sin_addr.s_addr);
+
+	    }
 
             if (MilterDebugMode) {
                 ostringstream Temp;
                 logInfo(ContextName, InfoCode, Temp.str());
             }
 
+	    if (0 == SaIn) {                                                    // If HostAddr is 0, don't do a scan.
+
+		return FailSafeMilterResponse;
+
+	    }
+
             SNFMilterAction IpScanResult;                                       // Perform IP scan.
 
             IpScanResult = Context->milterEngine.scanIP(Context->ConnectionData.HostIP);