- Michael Wallner provided a patch that adds support for CURLOPT_TIMEOUT_MS

and CURLOPT_CONNECTTIMEOUT_MS that, as their names should hint, do the
  timeouts with millisecond resolution instead. The only restriction to that
  is the alarm() (sometimes) used to abort name resolves as that uses full
  seconds. I fixed the FTP response timeout part of the patch.

  Internally we now count and keep the timeouts in milliseconds but it also
  means we multiply set timeouts with 1000. The effect of this is that no
  timeout can be set to more than 2^31 milliseconds (on 32 bit systems), which
  equals 24.86 days.  We probably couldn't before either since the code did
  *1000 on the timeout values on several places already.

lib/hostares.c

@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -183,7 +183,7 @@ CURLcode Curl_wait_for_resolv(struct connectdata *conn,
 {
   CURLcode rc=CURLE_OK;
   struct SessionHandle *data = conn->data;
-  long timeout = CURL_TIMEOUT_RESOLVE; /* default name resolve timeout */
+  long timeout;
 
   /* now, see if there's a connect timeout or a regular timeout to
      use instead of the default one */
@@ -191,14 +191,8 @@ CURLcode Curl_wait_for_resolv(struct connectdata *conn,
     timeout = conn->data->set.connecttimeout;
   else if(conn->data->set.timeout)
     timeout = conn->data->set.timeout;
-
-  /* We convert the number of seconds into number of milliseconds here: */
-  if(timeout < 2147483)
-    /* maximum amount of seconds that can be multiplied with 1000 and
-       still fit within 31 bits */
-    timeout *= 1000;
   else
-    timeout = 0x7fffffff; /* ridiculous amount of time anyway */
+    timeout = CURL_TIMEOUT_RESOLVE * 1000; /* default name resolve timeout */
 
   /* Wait for the name resolve query to complete. */
   while (1) {