src/transport/plugin_transport_http_server.c


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/*
     This file is part of GNUnet
     (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)

     GNUnet is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published
     by the Free Software Foundation; either version 3, or (at your
     option) any later version.

     GNUnet 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
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
*/

/**
 * @file transport/plugin_transport_http.c
 * @brief http transport service plugin
 * @author Matthias Wachs
 */

#include "plugin_transport_http.h"

#define HTTP_ERROR_RESPONSE "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"><HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD><BODY><H1>Not Found</H1>The requested URL was not found on this server.<P><HR><ADDRESS></ADDRESS></BODY></HTML>"
#define _RECEIVE 0
#define _SEND 1

static struct Plugin * p;

/**
 * Function that queries MHD's select sets and
 * starts the task waiting for them.
 * @param plugin plugin
 * @param daemon_handle the MHD daemon handle
 * @param now schedule now or with MHD delay
 * @return gnunet task identifier
 */
static GNUNET_SCHEDULER_TaskIdentifier
server_schedule (struct Plugin *plugin,
                 struct MHD_Daemon *daemon_handle,
                 int now);

static void
server_log (void *arg, const char *fmt, va_list ap)
{
  char text[1024];

  vsnprintf (text, sizeof (text), fmt, ap);
  va_end (ap);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Server: %s\n", text);
}

/**
 * Check if incoming connection is accepted.
 * NOTE: Here every connection is accepted
 * @param cls plugin as closure
 * @param addr address of incoming connection
 * @param addr_len address length of incoming connection
 * @return MHD_YES if connection is accepted, MHD_NO if connection is rejected
 *
 */
static int
server_accept_cb (void *cls, const struct sockaddr *addr, socklen_t addr_len)
{
  struct Plugin *plugin = cls;

  if (plugin->cur_connections <= plugin->max_connections)
    return MHD_YES;
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Server: Cannot accept new connections\n");
    return MHD_NO;
  }
}


#if BUILD_HTTPS
static char *
server_load_file (const char *file)
{
  struct GNUNET_DISK_FileHandle *gn_file;
  uint64_t fsize;
  char *text = NULL;

  if (GNUNET_OK != GNUNET_DISK_file_size (file,
      &fsize, GNUNET_NO, GNUNET_YES))
    return NULL;
  text = GNUNET_malloc (fsize + 1);
  gn_file =
      GNUNET_DISK_file_open (file, GNUNET_DISK_OPEN_READ,
                             GNUNET_DISK_PERM_USER_READ);
  if (gn_file == NULL)
  {
    GNUNET_free (text);
    return NULL;
  }
  if (GNUNET_SYSERR == GNUNET_DISK_file_read (gn_file, text, fsize))
  {
    GNUNET_free (text);
    GNUNET_DISK_file_close (gn_file);
    return NULL;
  }
  text[fsize] = '\0';
  GNUNET_DISK_file_close (gn_file);
  return text;
}
#endif


#if BUILD_HTTPS

static int
server_load_certificate (struct Plugin *plugin)
{
  int res = GNUNET_OK;

  char *key_file;
  char *cert_file;

  /* Get crypto init str