--- moka5/lib/connect.c	Sun Sep  6 15:39:01 2009
+++ costa/lib/connect.c	Wed Sep 30 18:53:40 2009
@@ -717,6 +717,13 @@
 void Curl_sndbufset(curl_socket_t sockfd)
 {
   int val = CURL_MAX_WRITE_SIZE + 32;
+  int curval = 0;
+  int curlen = sizeof(curval);
+
+  if (getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char *)&curval, &curlen) == 0)
+    if (curval > val)
+      return;
+
   setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (const char *)&val, sizeof(val));
 }
 #endif