/*
     This file is part of libmicrohttpd
     (C) 2007, 2008 Christian Grothoff (and other contributing authors)

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.

     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
/**
 * @file minimal_example.c
 * @brief minimal example for how to generate an infinite stream with libmicrohttpd
 * @author Christian Grothoff
 */
#include "platform.h"
#include <microhttpd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>


int i=0;

static ssize_t
data_generator (void *cls, uint64_t pos, char *buf, size_t max)
{
  struct MHD_Connection *connection = cls;

  /* starting header send, disable TCP cork */
  {
    const int val = 0;
    int fd;

    fd = MHD_get_connection_info (connection,
				  MHD_CONNECTION_INFO_CONNECTION_FD)->connect_fd;
    setsockopt (fd, IPPROTO_TCP, TCP_CORK, &val,
		sizeof (val));
    fprintf (stderr, "SSOPT (%d): %s\n", fd, strerror (errno));
  }
  /* now set nodelay as well */
  {
    const int val = 1;
    int fd;

    fd = MHD_get_connection_info (connection,
				  MHD_CONNECTION_INFO_CONNECTION_FD)->connect_fd;
    setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val,
		sizeof (val));
    fprintf (stderr, "SSOPT (%d): %s\n", fd, strerror (errno));
  }


	printf(" if-while \n");
if (i > 2){
	printf("Wait on while\n Kill process\n");
	while(1);
}
  if (max < 80)
    return 0;
  memset (buf, 'A', max - 1);
  buf[79] = '\n';
  i++;
  return 80;
}

static int
ahc_echo (void *cls,
          struct MHD_Connection *connection,
          const char *url,
          const char *method,
          const char *version,
          const char *upload_data, size_t *upload_data_size, void **ptr)
{
  static int aptr;
  struct MHD_Response *response;
  int ret;

  if (0 != strcmp (method, "GET"))
    return MHD_NO;              /* unexpected method */
  if (&aptr != *ptr)
    {
      /* do never respond on first call */
      *ptr = &aptr;
      return MHD_YES;
    }
  *ptr = NULL;                  /* reset when done */
  response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN,
                                                80,
                                                &data_generator, connection, NULL);
  ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
  MHD_destroy_response (response);
  return ret;
}

int
main (int argc, char *const *argv)
{
  struct MHD_Daemon *d;

  if (argc != 2)
    {
      printf ("%s PORT\n", argv[0]);
      return 1;
    }
  d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
                        atoi (argv[1]),
                        NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END);
  if (d == NULL)
    return 1;
  (void) getc (stdin);
  MHD_stop_daemon (d);
  return 0;
}

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 27206)
+++ ChangeLog	(working copy)
@@ -1,3 +1,8 @@
+Mon May 20 12:29:35 CEST 2013
+	Added MHD_CONNECTION_INFO_CONNECTION_FD to allow clients
+	direct access to connection socket; useful for COMET
+	applications that need to disable NAGLE (#2886). -CG
+
 Mon May 15 12:49:01 CEST 2013
 	Fixing #2859. -CG
 
Index: doc/libmicrohttpd.texi
===================================================================
--- doc/libmicrohttpd.texi	(revision 27206)
+++ doc/libmicrohttpd.texi	(working copy)
@@ -2138,6 +2138,18 @@
 Returns information about @code{struct MHD_Daemon} which manages
 this connection.
 
+@item MHD_CONNECTION_INFO_CONNECTION_FD
+Returns the file descriptor (usually a TCP socket) associated with
+this connection (in the ``connect-fd'' member of the returned struct).
+Note that manipulating the descriptor directly can have problematic
+consequences (as in, break HTTP).  Applications might use this access
+to manipulate TCP options, for example to set the ``TCP-NODELAY''
+option for COMET-like applications.  Note that MHD will set TCP-CORK
+after sending the HTTP header and clear it after finishing the footers
+automatically (if the platform supports it).  As the connection
+callbacks are invoked in between, those might be used to set different
+values for TCP-CORK and TCP-NODELAY in the meantime.
+
 @end table
 @end deftp
 
Index: src/include/microhttpd.h
===================================================================
--- src/include/microhttpd.h	(revision 27206)
+++ src/include/microhttpd.h	(working copy)
@@ -791,8 +791,15 @@
   /**
    * Get the 'struct MHD_Daemon' responsible for managing this connection.
    */
-  MHD_CONNECTION_INFO_DAEMON
+  MHD_CONNECTION_INFO_DAEMON,
 
+
+  /**
+   * Request the file descriptor for the listening socket.
+   * No extra arguments should be passed.
+   */
+  MHD_CONNECTION_INFO_CONNECTION_FD
+
 };
 
 
@@ -1852,6 +1859,11 @@
   int /* enum gnutls_protocol */ protocol;
 
   /**
+   * Connect socket 
+   */
+  int connect_fd;
+
+  /**
    * GNUtls session handle, of type "gnutls_session_t".
    */
   void * /* gnutls_session_t */ tls_session;
Index: src/microhttpd/connection.c
===================================================================
--- src/microhttpd/connection.c	(revision 27206)
+++ src/microhttpd/connection.c	(working copy)
@@ -2555,6 +2555,8 @@
       return (const union MHD_ConnectionInfo *) &connection->addr;
     case MHD_CONNECTION_INFO_DAEMON:
       return (const union MHD_ConnectionInfo *) &connection->daemon;
+    case MHD_CONNECTION_INFO_CONNECTION_FD:
+      return (const union MHD_ConnectionInfo *) &connection->socket_fd;
     default:
       return NULL;
     };