- client: put back the call to res_init() on lookup failure.

Apparently it worked after all.

svn path=/trunk/boinc/; revision=17793

checkin_notes

@@ -3826,3 +3826,12 @@ Rytis  11 Apr 2009
     
     html/inc/
         util.inc
+
+David  12 Apr 2009
+    - client: put back the call to res_init() on lookup failure.
+        Apparently it worked after all.
+
+    client/
+        http_curl.cpp
+    lib/
+        network.cpp,h

client/http_curl.cpp

@@ -1038,6 +1038,7 @@ void HTTP_OP::handle_messages(CURLMsg *pcurlMsg) {
         strcpy(error_msg, curl_easy_strerror(CurlResult));
         switch(CurlResult) {
         case CURLE_COULDNT_RESOLVE_HOST:
+            reset_dns();
             http_op_retval = ERR_GETHOSTBYNAME;
             break;
         case CURLE_COULDNT_CONNECT:

lib/network.cpp

@@ -202,4 +202,10 @@ int WinsockCleanup() {
 
 #endif
 
+void reset_dns() {
+#ifndef _WIN32
+    res_init();
+#endif
+}
+
 const char *BOINC_RCSID_557bf0741f="$Id$";

lib/network.h

@@ -46,6 +46,7 @@ extern int boinc_socket_asynch(int sock, bool asynch);
 extern void boinc_close_socket(int sock);
 extern int get_socket_error(int fd);
 extern const char* socket_error_str();
+extern void reset_dns();
 
 #if defined(_WIN32) && defined(USE_WINSOCK)
 typedef int boinc_socklen_t;