path: root/src/transport/plugin_transport_http_common.c

/*
 This file is part of GNUnet
 Copyright (C) 2002-2013 GNUnet e.V.

 GNUnet is free software: you can redistribute it and/or modify it
 under the terms of the GNU Affero General Public License as published
 by the Free Software Foundation, either version 3 of the License,
 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
 Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @file transport/plugin_transport_http_common.c
 * @brief functionality shared between http(s)client plugins
 * @author Matthias Wachs
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_transport_plugin.h"
#include "plugin_transport_http_common.h"
#include "gnunet_resolver_service.h"

static void
http_clean_splitted (struct SplittedHTTPAddress *spa)
{
  if (NULL != spa)
  {
    GNUNET_free_non_null(spa->protocol);
    GNUNET_free_non_null(spa->host);
    GNUNET_free_non_null(spa->path);
    GNUNET_free_non_null(spa);
  }
}


struct SplittedHTTPAddress *
http_split_address (const char * addr)
{
  struct SplittedHTTPAddress *sp;
  char *src = GNUNET_strdup (addr);
  char *protocol_start = NULL;
  char *host_start = NULL;
  char *v6_end = NULL;
  char *port_start = NULL;
  char *path_start = NULL;
  protocol_start = src;

  sp = GNUNET_new (struct SplittedHTTPAddress);
  /* Address string consists of protocol://host[:port]path*/

  host_start = strstr (src, "://");
  if (NULL == host_start)
  {
    GNUNET_free(src);
    GNUNET_free(sp);
    return NULL ;
  }
  host_start[0] = '\0';
  sp->protocol = GNUNET_strdup (protocol_start);

  host_start += strlen ("://");
  if (strlen (host_start) == 0)
  {
    GNUNET_free(src);
    GNUNET_free(sp->protocol);
    GNUNET_free(sp);
    return NULL ;
  }

  /* Find path start */
  path_start = strchr (host_start, '/');
  if (NULL != path_start)
  {
    sp->path = GNUNET_strdup (path_start);
    path_start[0] = '\0';
  }
  else
    sp->path = GNUNET_strdup ("");

  if (strlen (host_start) < 1)
  {
    GNUNET_free(src);
    GNUNET_free(sp->protocol);
    GNUNET_free(sp->path);
    GNUNET_free(sp);
    return NULL ;
  }

  if (NULL != (port_start = strrchr (host_start, ':')))
  {
    /* *We COULD have a port, but also an IPv6 address! */
    if (NULL != (v6_end = strchr (host_start, ']')))
    {
      if (v6_end < port_start)
      {
        /* IPv6 address + port */
        port_start[0] = '\0';
        port_start++;
        sp->port = atoi (port_start);
        if ((0 == sp->port) || (65535 < sp->port))
        {
          GNUNET_free(src);
          GNUNET_free(sp->protocol);
          GNUNET_free(sp->path);
          GNUNET_free(sp);
          return NULL ;
        }
      }
      else
      {
        /* IPv6 address + no port */
        if (0 == strcmp (sp->protocol, "https"))
          sp->port = HTTPS_DEFAULT_PORT;
        else if (0 == strcmp (sp->protocol, "http"))
          sp->port = HTTP_DEFAULT_PORT;
      }
    }
    else
    {
      /* No IPv6 address */
      port_start[0] = '\0';
      port_start++;
      sp->port = atoi (port_start);
      if ((0 == sp->port) || (65535 < sp->port))
      {
        GNUNET_free(src);
        GNUNET_free(sp->protocol);
        GNUNET_free(sp->path);
        GNUNET_free(sp);
        return NULL ;
      }
    }
  }
  else
  {
    /* No ':' as port separator, default port for protocol */
    if (0 == strcmp (sp->protocol, "https"))
      sp->port = HTTPS_DEFAULT_PORT;
    else if (0 == strcmp (sp->protocol, "http"))
      sp->port = HTTP_DEFAULT_PORT;
    else
    {
      GNUNET_break(0);
      GNUNET_free(src);
      GNUNET_free(sp->protocol);
      GNUNET_free(sp->path);
      GNUNET_free(sp);
      return NULL ;
    }
  }
  if (strlen (host_start) > 0)
    sp->host = GNUNET_strdup (host_start);
  else
  {
    GNUNET_break(0);
    GNUNET_free(src);
    GNUNET_free(sp->protocol);
    GNUNET_free(sp->path);
    GNUNET_free(sp);
    return NULL ;
  }
  GNUNET_free(src);
  return sp;
}

/**