- Markus Moeller introduced two new options to libcurl:

CURLOPT_SOCKS5_GSSAPI_SERVICE and CURLOPT_SOCKS5_GSSAPI_NEC to allow libcurl
  to do GSS-style authentication with SOCKS5 proxies. The curl tool got the
  options called --socks5-gssapi-service and --socks5-gssapi-nec to enable
  these.

lib/socks.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2009, 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
@@ -23,6 +23,20 @@
  * $Id$
  ***************************************************************************/
 
+/*
+ * Helper read-from-socket functions. Does the same as Curl_read() but it
+ * blocks until all bytes amount of buffersize will be read. No more, no less.
+ *
+ * This is STUPID BLOCKING behaviour which we frown upon, but right now this
+ * is what we have...
+ */
+int Curl_blockread_all(struct connectdata *conn,
+                       curl_socket_t sockfd,
+                       char *buf,
+                       ssize_t buffersize,
+                       ssize_t *n,
+                       long conn_timeout);
+
 /*
  * This function logs in to a SOCKS4(a) proxy and sends the specifics to the
  * final destination server.
@@ -45,4 +59,12 @@ CURLcode Curl_SOCKS5(const char *proxy_name,
                      int sockindex,
                      struct connectdata *conn);
 
+#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
+/*
+ * This function handles the sockss5 gssapie negotiation and initialisation
+ */
+CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex,
+                                      struct connectdata *conn);
 #endif
+
+#endif  /* __SOCKS_H */