testing.c

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/*
      This file is part of GNUnet
      Copyright (C) 2008, 2009, 2012 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/>.
 
     SPDX-License-Identifier: AGPL3.0-or-later
 */
 
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_arm_service.h"
#include "gnunet_testing_lib.h"
#include "gnunet_testing_ng_lib.h"
#include "gnunet_testing_plugin.h"
#include "gnunet_testing_barrier.h"
#include "gnunet_testing_netjail_lib.h"
#include "testing_cmds.h"
 
#define LOG(kind, ...) GNUNET_log_from (kind, "testing-api", __VA_ARGS__)
 
#define CONNECT_ADDRESS_TEMPLATE "%s-192.168.15.%u"
 
#define ROUTER_CONNECT_ADDRESS_TEMPLATE "%s-92.68.150.%u"
 
#define KNOWN_CONNECT_ADDRESS_TEMPLATE "%s-92.68.151.%u"
 
/* Use the IP addresses below instead of the public ones,
 * if the start script was not started from within a new namespace
 * created by unshare. The UPNP test case needs public IP
 * addresse for miniupnpd to function.
 * FIXME We should introduce a switch indicating if public
 * addresses should be used or not. This info has to be
 * propagated from the start script to the c code.
#define ROUTER_CONNECT_ADDRESS_TEMPLATE "%s-172.16.150.%u"
 
#define KNOWN_CONNECT_ADDRESS_TEMPLATE "%s-172.16.151.%u"
*/
 
#define PREFIX_TCP "tcp"
 
#define PREFIX_UDP "udp"
 
#define PREFIX_TCP_NATTED "tcp_natted"
 
#define PREFIX_UDP_NATTED "udp_natted"
 
#define LOW_PORT 12000
 
#define HIGH_PORT 56000
 
 
struct SharedServiceInstance
{
  struct SharedService *ss;
 
  char *cfg_fn;
 
  struct GNUNET_OS_Process *proc;
 
  char *unix_sock;
 
  char *port_str;
 
  unsigned int n_refs;
};
 
struct SharedService
{
  char *sname;
 
  struct SharedServiceInstance **instances;
 
  struct GNUNET_CONFIGURATION_Handle *cfg;
 
  unsigned int n_peers;
 
  unsigned int share;
 
  unsigned int n_instances;
};
 
 
struct GNUNET_TESTING_System
{
  char *tmppath;
 
  char *trusted_ip;
 
  char *hostname;
 
  char *hostkeys_data;
 
  struct GNUNET_DISK_MapHandle *map;
 
  struct SharedService *shared_services;
 
  unsigned int n_shared_services;
 
  uint32_t reserved_ports[65536 / 32];
 
  uint32_t path_counter;
 
  uint32_t total_hostkeys;
 
  uint16_t lowport;
 
  uint16_t highport;
};
 
 
struct GNUNET_TESTING_Peer
{
  struct GNUNET_TESTING_System *system;
 
  char *cfgfile;
 
  char *main_binary;
  char *args;
 
  struct GNUNET_OS_Process *main_process;
 
  struct GNUNET_ARM_Handle *ah;
 
  struct GNUNET_CONFIGURATION_Handle *cfg;
 
  GNUNET_TESTING_PeerStopCallback cb;
 
  void *cb_cls;
 
  struct GNUNET_PeerIdentity *id;
 
  struct SharedServiceInstance **ss_instances;
 
  uint16_t *ports;
 
  unsigned int nports;
 
  uint32_t key_number;
};
 
 
static enum GNUNET_GenericReturnValue
hostkeys_load (struct GNUNET_TESTING_System *system)
{
  uint64_t fs;
  char *data_dir;
  char *filename;
  struct GNUNET_DISK_FileHandle *fd;
 
  GNUNET_assert (NULL == system->hostkeys_data);
  data_dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_DATADIR);
  GNUNET_asprintf (&filename, "%s/testing_hostkeys.ecc", data_dir);
  GNUNET_free (data_dir);
 
  if (GNUNET_YES != GNUNET_DISK_file_test (filename))
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Hostkeys file not found: %s\n"),
         filename);
    GNUNET_free (filename);
    return GNUNET_SYSERR;
  }
  /* Check hostkey file size, read entire thing into memory */
  if (GNUNET_OK !=
      GNUNET_DISK_file_size (filename, &fs, GNUNET_YES, GNUNET_YES))
    fs = 0;
  if (0 == fs)
  {
    GNUNET_free (filename);
    return GNUNET_SYSERR;   /* File is empty */
  }
  if (0 != (fs % GNUNET_TESTING_HOSTKEYFILESIZE))
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Incorrect hostkey file format: %s\n"),
         filename);
    GNUNET_free (filename);
    return GNUNET_SYSERR;
  }
  fd = GNUNET_DISK_file_open (filename,
                              GNUNET_DISK_OPEN_READ,
                              GNUNET_DISK_PERM_NONE);
  if (NULL == fd)
  {
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", filename);
    GNUNET_free (filename);
    return GNUNET_SYSERR;
  }
  GNUNET_free (filename);
  system->hostkeys_data =
    GNUNET_DISK_file_map (fd, &system->map, GNUNET_DISK_MAP_TYPE_READ, fs);
  GNUNET_DISK_file_close (fd);
  if (NULL == system->hostkeys_data)
    return GNUNET_SYSERR;
  system->total_hostkeys = fs / GNUNET_TESTING_HOSTKEYFILESIZE;
  return GNUNET_OK;
}
 
 
static void
hostkeys_unload (struct GNUNET_TESTING_System *system)
{
  GNUNET_break (NULL != system->hostkeys_data);
  system->hostkeys_data = NULL;
  GNUNET_DISK_file_unmap (system->map);
  system->map = NULL;
  system->hostkeys_data = NULL;
  system->total_hostkeys = 0;
}
 
 
static void
cfg_copy_iterator (void *cls,
                   const char *section,
                   const char *option,
                   const char *value)
{
  struct GNUNET_CONFIGURATION_Handle *cfg2 = cls;
 
  GNUNET_CONFIGURATION_set_value_string (cfg2, section, option, value);
}
 
 
struct GNUNET_TESTING_System *
GNUNET_TESTING_system_create_with_portrange (
  const char *testdir,
  const char *trusted_ip,
  const char *hostname,
  const struct GNUNET_TESTING_SharedService *shared_services,
  uint16_t lowport,
  uint16_t highport)
{
  struct GNUNET_TESTING_System *system;
  struct GNUNET_TESTING_SharedService tss;
  struct SharedService ss;
  unsigned int cnt;
 
  GNUNET_assert (NULL != testdir);
  system = GNUNET_new (struct GNUNET_TESTING_System);
  if (NULL == (system->tmppath = getenv (GNUNET_TESTING_PREFIX)))
    system->tmppath = GNUNET_DISK_mkdtemp (testdir);
  else
    system->tmppath = GNUNET_strdup (system->tmppath);
  system->lowport = lowport;
  system->highport = highport;
  if (NULL == system->tmppath)
  {
    GNUNET_free (system);
    return NULL;
  }
  if (NULL != trusted_ip)
    system->trusted_ip = GNUNET_strdup (trusted_ip);
  if (NULL != hostname)
    system->hostname = GNUNET_strdup (hostname);
  if (GNUNET_OK != hostkeys_load (system))
  {
    GNUNET_TESTING_system_destroy (system, GNUNET_YES);
    return NULL;
  }
  if (NULL == shared_services)
    return system;
  for (cnt = 0; NULL != shared_services[cnt].service; cnt++)
  {
    tss = shared_services[cnt];
    memset (&ss, 0, sizeof (ss));
    ss.sname = GNUNET_strdup (tss.service);
    ss.cfg = GNUNET_CONFIGURATION_create ();
    GNUNET_CONFIGURATION_iterate_section_values (tss.cfg,
                                                 ss.sname,
                                                 &cfg_copy_iterator,
                                                 ss.cfg);
    GNUNET_CONFIGURATION_iterate_section_values (tss.cfg,
                                                 "TESTING",
                                                 &cfg_copy_iterator,
                                                 ss.cfg);
    GNUNET_CONFIGURATION_iterate_section_values (tss.cfg,
                                                 "PATHS",
                                                 &cfg_copy_iterator,
                                                 ss.cfg);
    ss.share = tss.share;
    GNUNET_array_append (system->shared_services,
                         system->n_shared_services,
                         ss);
  }
  return system;
}
 
 
struct GNUNET_TESTING_System *
GNUNET_TESTING_system_create (
  const char *testdir,
  const char *trusted_ip,
  const char *hostname,
  const struct GNUNET_TESTING_SharedService *shared_services)
{
  return GNUNET_TESTING_system_create_with_portrange (testdir,
                                                      trusted_ip,
                                                      hostname,
                                                      shared_services,
                                                      LOW_PORT,
                                                      HIGH_PORT);
}
 
 
static void
cleanup_shared_service_instance (struct SharedServiceInstance *i)
{
  if (NULL != i->cfg_fn)
  {
    (void) unlink (i->cfg_fn);
    GNUNET_free (i->cfg_fn);
  }
  GNUNET_free (i->unix_sock);
  GNUNET_free (i->port_str);
  GNUNET_break (NULL == i->proc);
  GNUNET_break (0 == i->n_refs);
  GNUNET_free (i);
}
 
 
static enum GNUNET_GenericReturnValue
start_shared_service_instance (struct SharedServiceInstance *i)
{
  char *binary;
  char *libexec_binary;
 
  GNUNET_assert (NULL == i->proc);
  GNUNET_assert (NULL != i->cfg_fn);
  (void) GNUNET_asprintf (&binary, "gnunet-service-%s", i->ss->sname);
  libexec_binary = GNUNET_OS_get_libexec_binary_path (binary);
  GNUNET_free (binary);
  i->proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_OUT_AND_ERR,
                                     NULL,
                                     NULL,
                                     NULL,
                                     libexec_binary,
                                     libexec_binary,
                                     "-c",
                                     i->cfg_fn,
                                     NULL);
  GNUNET_free (libexec_binary);
  if (NULL == i->proc)
    return GNUNET_SYSERR;
  return GNUNET_OK;
}
 
 
static void
stop_shared_service_instance (struct SharedServiceInstance *i)
{
  GNUNET_break (0 == i->n_refs);
  if (0 != GNUNET_OS_process_kill (i->proc, GNUNET_TERM_SIG))
    LOG (GNUNET_ERROR_TYPE_WARNING,
         "Killing shared service instance (%s) failed\n",
         i->ss->sname);
  (void) GNUNET_OS_process_wait (i->proc);
  GNUNET_OS_process_destroy (i->proc);
  i->proc = NULL;
}
 
 
void
GNUNET_TESTING_system_destroy (struct GNUNET_TESTING_System *system,
                               int remove_paths)
{
  struct SharedService *ss;
  struct SharedServiceInstance *i;
  unsigned int ss_cnt;
  unsigned int i_cnt;
 
  if (NULL != system->hostkeys_data)
    hostkeys_unload (system);
  for (ss_cnt = 0; ss_cnt < system->n_shared_services; ss_cnt++)
  {
    ss = &system->shared_services[ss_cnt];
    for (i_cnt = 0; i_cnt < ss->n_instances; i_cnt++)
    {
      i = ss->instances[i_cnt];
      if (NULL != i->proc)
        stop_shared_service_instance (i);
      cleanup_shared_service_instance (i);
    }
    GNUNET_free (ss->instances);
    GNUNET_CONFIGURATION_destroy (ss->cfg);
    GNUNET_free (ss->sname);
  }
  GNUNET_free (system->shared_services);
  if (GNUNET_YES == remove_paths)
    GNUNET_DISK_directory_remove (system->tmppath);
  GNUNET_free (system->tmppath);
  GNUNET_free (system->trusted_ip);
  GNUNET_free (system->hostname);
  GNUNET_free (system);
}
 
 
uint16_t
GNUNET_TESTING_reserve_port (struct GNUNET_TESTING_System *system)
{
  struct GNUNET_NETWORK_Handle *socket;
  struct addrinfo hint;
  struct addrinfo *ret;
  struct addrinfo *ai;
  uint32_t *port_buckets;
  char *open_port_str;
  int bind_status;
  uint32_t xor_image;
  uint16_t index;
  uint16_t open_port;
  uint16_t pos;
 
  /*
     FIXME: Instead of using getaddrinfo we should try to determine the port
         status by the following heurestics.
 
         On systems which support both IPv4 and IPv6, only ports open on both
         address families are considered open.
         On system with either IPv4 or IPv6. A port is considered open if it's
         open in the respective address family
   */hint.ai_family = AF_UNSPEC; /* IPv4 and IPv6 */
  hint.ai_socktype = 0;
  hint.ai_protocol = 0;
  hint.ai_addrlen = 0;
  hint.ai_addr = NULL;
  hint.ai_canonname = NULL;
  hint.ai_next = NULL;
  hint.ai_flags = AI_PASSIVE | AI_NUMERICSERV; /* Wild card address */
  port_buckets = system->reserved_ports;
  for (index = (system->lowport / 32) + 1; index < (system->highport / 32);
       index++)
  {
    xor_image = (UINT32_MAX ^ port_buckets[index]);
    if (0 == xor_image)   /* Ports in the bucket are full */
      continue;
    pos = system->lowport % 32;
    while (pos < 32)
    {
      if (0 == ((xor_image >> pos) & 1U))
      {
        pos++;
        continue;
      }
      open_port = (index * 32) + pos;
      if (open_port >= system->highport)
        return 0;
      GNUNET_asprintf (&open_port_str, "%u", (unsigned int) open_port);
      ret = NULL;
      GNUNET_assert (0 == getaddrinfo (NULL, open_port_str, &hint, &ret));
      GNUNET_free (open_port_str);
      bind_status = GNUNET_NO;
      for (ai = ret; NULL != ai; ai = ai->ai_next)
      {
        socket = GNUNET_NETWORK_socket_create (ai->ai_family, SOCK_STREAM, 0);
        if (NULL == socket)
          continue;
        bind_status =
          GNUNET_NETWORK_socket_bind (socket, ai->ai_addr, ai->ai_addrlen);
        GNUNET_NETWORK_socket_close (socket);
        if (GNUNET_OK != bind_status)
          break;
        socket = GNUNET_NETWORK_socket_create (ai->ai_family, SOCK_DGRAM, 0);
        if (NULL == socket)
          continue;
        bind_status =
          GNUNET_NETWORK_socket_bind (socket, ai->ai_addr, ai->ai_addrlen);
        GNUNET_NETWORK_socket_close (socket);
        if (GNUNET_OK != bind_status)
          break;
      }
      port_buckets[index] |= (1U << pos);     /* Set the port bit */
      freeaddrinfo (ret);
      if (GNUNET_OK == bind_status)
      {
        LOG (GNUNET_ERROR_TYPE_DEBUG,
             "Found a free port %u\n",
             (unsigned int) open_port);
        return open_port;
      }
      pos++;
    }
  }
  return 0;
}
 
 
void
GNUNET_TESTING_release_port (struct GNUNET_TESTING_System *system,
                             uint16_t port)
{
  uint32_t *port_buckets;
  uint16_t bucket;
  uint16_t pos;
 
  port_buckets = system->reserved_ports;
  bucket = port / 32;
  pos = port % 32;
  LOG (GNUNET_ERROR_TYPE_DEBUG, "Releasing port %u\n", port);
  if (0 == (port_buckets[bucket] & (1U << pos)))
  {
    GNUNET_break (0);  /* Port was not reserved by us using reserve_port() */
    return;
  }
  port_buckets[bucket] &= ~(1U << pos);
}
 
 
struct GNUNET_CRYPTO_EddsaPrivateKey *
GNUNET_TESTING_hostkey_get (const struct GNUNET_TESTING_System *system,
                            uint32_t key_number,
                            struct GNUNET_PeerIdentity *id)
{
  struct GNUNET_CRYPTO_EddsaPrivateKey *private_key;
 
  if ((NULL == id) || (NULL == system->hostkeys_data))
    return NULL;
  if (key_number >= system->total_hostkeys)
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Key number %u does not exist\n"),
         key_number);
    return NULL;
  }
  private_key = GNUNET_new (struct GNUNET_CRYPTO_EddsaPrivateKey);
  GNUNET_memcpy (private_key,
                 system->hostkeys_data
                 + (key_number * GNUNET_TESTING_HOSTKEYFILESIZE),
                 GNUNET_TESTING_HOSTKEYFILESIZE);
  GNUNET_CRYPTO_eddsa_key_get_public (private_key, &id->public_key);
  return private_key;
}
 
 
struct UpdateContext
{
  struct GNUNET_TESTING_System *system;
 
  struct GNUNET_CONFIGURATION_Handle *cfg;
 
  char *gnunet_home;
 
  uint16_t *ports;
 
  unsigned int nports;
 
  int status;
};
 
 
static void
update_config (void *cls,
               const char *section,
               const char *option,
               const char *value)
{
  struct UpdateContext *uc = cls;
  unsigned int ival;
  char cval[12];
  char uval[PATH_MAX];
  char *single_variable;
  char *per_host_variable;
  unsigned long long num_per_host;
  uint16_t new_port;
 
  if (GNUNET_OK != uc->status)
    return;
  if (! ((0 == strcmp (option, "PORT")) || (0 == strcmp (option, "UNIXPATH")) ||
         (0 == strcmp (option, "HOSTNAME"))))
    return;
  GNUNET_asprintf (&single_variable, "single_%s_per_host", section);
  GNUNET_asprintf (&per_host_variable, "num_%s_per_host", section);
  if ((0 == strcmp (option, "PORT")) && (1 == sscanf (value, "%u", &ival)))
  {
    if ((ival != 0) &&
        (GNUNET_YES != GNUNET_CONFIGURATION_get_value_yesno (uc->cfg,
                                                             "testing",
                                                             single_variable)))
    {
      new_port = GNUNET_TESTING_reserve_port (uc->system);
      if (0 == new_port)
      {
        uc->status = GNUNET_SYSERR;
        GNUNET_free (single_variable);
        GNUNET_free (per_host_variable);
        return;
      }
      GNUNET_snprintf (cval, sizeof(cval), "%u", new_port);
      value = cval;
      GNUNET_array_append (uc->ports, uc->nports, new_port);
    }
    else if ((ival != 0) &&
             (GNUNET_YES ==
              GNUNET_CONFIGURATION_get_value_yesno (uc->cfg,
                                                    "testing",
                                                    single_variable)) &&
             GNUNET_CONFIGURATION_get_value_number (uc->cfg,
                                                    "testing",
                                                    per_host_variable,
                                                    &num_per_host))
    {
      /* GNUNET_snprintf (cval, sizeof (cval), "%u", */
      /*                  ival + ctx->fdnum % num_per_host); */
      /* value = cval; */
      GNUNET_break (0);    /* FIXME */
    }
  }
  if (0 == strcmp (option, "UNIXPATH"))
  {
    if (GNUNET_YES != GNUNET_CONFIGURATION_get_value_yesno (uc->cfg,
                                                            "testing",
                                                            single_variable))
    {
      GNUNET_snprintf (uval,
                       sizeof(uval),
                       "%s/%s.sock",
                       uc->gnunet_home,
                       section);
      value = uval;
    }
    else if ((GNUNET_YES ==
              GNUNET_CONFIGURATION_get_value_number (uc->cfg,
                                                     "testing",
                                                     per_host_variable,
                                                     &num_per_host)) &&
             (num_per_host > 0))
    {
      GNUNET_break (0);    /* FIXME */
    }
  }
  if (0 == strcmp (option, "HOSTNAME"))
  {
    value = (NULL == uc->system->hostname) ? "localhost" : uc->system->hostname;
  }
  GNUNET_free (single_variable);
  GNUNET_free (per_host_variable);
  GNUNET_CONFIGURATION_set_value_string (uc->cfg, section, option, value);
}
 
 
static void
update_config_sections (void *cls, const char *section)
{
  struct UpdateContext *uc = cls;
  char **ikeys;
  char *val;
  char *ptr;
  char *orig_allowed_hosts;
  char *allowed_hosts;
  char *ACCEPT_FROM_key;
  uint16_t ikeys_cnt;
  uint16_t key;
 
  ikeys_cnt = 0;
  val = NULL;
  /* Ignore certain options from sections.  See
     https://gnunet.org/bugs/view.php?id=2476 */
  if (GNUNET_YES ==
      GNUNET_CONFIGURATION_have_value (uc->cfg, section, "TESTING_IGNORE_KEYS"))
  {
    GNUNET_assert (GNUNET_YES ==
                   GNUNET_CONFIGURATION_get_value_string (uc->cfg,
                                                          section,
                                                          "TESTING_IGNORE_KEYS",
                                                          &val));
    ptr = val;
    for (ikeys_cnt = 0; NULL != (ptr = strstr (ptr, ";")); ikeys_cnt++)
      ptr++;
    if (0 == ikeys_cnt)
      GNUNET_break (0);
    else
    {
      ikeys = GNUNET_malloc ((sizeof(char *)) * ikeys_cnt);
      ptr = val;
      for (key = 0; key < ikeys_cnt; key++)
      {
        ikeys[key] = ptr;
        ptr = strstr (ptr, ";");
        GNUNET_assert (NULL != ptr);      /* worked just before... */
        *ptr = '\0';
        ptr++;
      }
    }
  }
  if (0 != ikeys_cnt)
  {
    for (key = 0; key < ikeys_cnt; key++)
    {
      if (NULL != strstr (ikeys[key], "ADVERTISED_PORT"))
        break;
    }
    if ((key == ikeys_cnt) &&
        (GNUNET_YES ==
         GNUNET_CONFIGURATION_have_value (uc->cfg, section, "ADVERTISED_PORT")))
    {
      if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (uc->cfg,
                                                              section,
                                                              "PORT",
                                                              &ptr))
      {
        GNUNET_CONFIGURATION_set_value_string (uc->cfg,
                                               section,
                                               "ADVERTISED_PORT",
                                               ptr);
        GNUNET_free (ptr);
      }
    }
    for (key = 0; key < ikeys_cnt; key++)
    {
      if (NULL != strstr (ikeys[key], "ACCEPT_FROM"))
      {
        GNUNET_free (ikeys);
        GNUNET_free (val);
        return;
      }
    }
    GNUNET_free (ikeys);
  }
  GNUNET_free (val);
  ACCEPT_FROM_key = "ACCEPT_FROM";
  if ((NULL != uc->system->trusted_ip) &&
      (NULL != strstr (uc->system->trusted_ip, ":"))) /* IPv6 in use */
    ACCEPT_FROM_key = "ACCEPT_FROM6";
  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (uc->cfg,
                                                          section,
                                                          ACCEPT_FROM_key,
                                                          &orig_allowed_hosts))
  {
    orig_allowed_hosts = GNUNET_strdup ("127.0.0.1;");
  }
  if (NULL == uc->system->trusted_ip)
    allowed_hosts = GNUNET_strdup (orig_allowed_hosts);
  else
    GNUNET_asprintf (&allowed_hosts,
                     "%s%s;",
                     orig_allowed_hosts,
                     uc->system->trusted_ip);
  GNUNET_free (orig_allowed_hosts);
  GNUNET_CONFIGURATION_set_value_string (uc->cfg,
                                         section,
                                         ACCEPT_FROM_key,
                                         allowed_hosts);
  GNUNET_free (allowed_hosts);
}
 
 
static struct SharedServiceInstance *
associate_shared_service (struct GNUNET_TESTING_System *system,
                          struct SharedService *ss,
                          struct GNUNET_CONFIGURATION_Handle *cfg)
{
  struct SharedServiceInstance *i;
  struct GNUNET_CONFIGURATION_Handle *temp;
  char *gnunet_home;
  uint32_t port;
 
  ss->n_peers++;
  if (((0 == ss->share) && (NULL == ss->instances)) ||
      ((0 != ss->share) &&
       (ss->n_instances < ((ss->n_peers + ss->share - 1) / ss->share))))
  {
    i = GNUNET_new (struct SharedServiceInstance);
    i->ss = ss;
    (void) GNUNET_asprintf (&gnunet_home,
                            "%s/shared/%s/%u",
                            system->tmppath,
                            ss->sname,
                            ss->n_instances);
    (void) GNUNET_asprintf (&i->unix_sock, "%s/sock", gnunet_home);
    port = GNUNET_TESTING_reserve_port (system);
    if (0 == port)
    {
      GNUNET_free (gnunet_home);
      cleanup_shared_service_instance (i);
      return NULL;
    }
    GNUNET_array_append (ss->instances, ss->n_instances, i);
    temp = GNUNET_CONFIGURATION_dup (ss->cfg);
    (void) GNUNET_asprintf (&i->port_str, "%u", port);
    (void) GNUNET_asprintf (&i->cfg_fn, "%s/config", gnunet_home);
    GNUNET_CONFIGURATION_set_value_string (temp,
                                           "PATHS",
                                           "GNUNET_HOME",
                                           gnunet_home);
    GNUNET_free (gnunet_home);
    GNUNET_CONFIGURATION_set_value_string (temp,
                                           ss->sname,
                                           "UNIXPATH",
                                           i->unix_sock);
    GNUNET_CONFIGURATION_set_value_string (temp,
                                           ss->sname,
                                           "PORT",
                                           i->port_str);
    if (GNUNET_SYSERR == GNUNET_CONFIGURATION_write (temp, i->cfg_fn))
    {
      GNUNET_CONFIGURATION_destroy (temp);
      cleanup_shared_service_instance (i);
      return NULL;
    }
    GNUNET_CONFIGURATION_destroy (temp);
  }
  else
  {
    GNUNET_assert (NULL != ss->instances);
    GNUNET_assert (0 < ss->n_instances);
    i = ss->instances[ss->n_instances - 1];
  }
  GNUNET_CONFIGURATION_iterate_section_values (ss->cfg,
                                               ss->sname,
                                               &cfg_copy_iterator,
                                               cfg);
  GNUNET_CONFIGURATION_set_value_string (cfg,
                                         ss->sname,
                                         "UNIXPATH",
                                         i->unix_sock);
  GNUNET_CONFIGURATION_set_value_string (cfg, ss->sname, "PORT", i->port_str);
  return i;
}
 
 
static int
GNUNET_TESTING_configuration_create_ (struct GNUNET_TESTING_System *system,
                                      struct GNUNET_CONFIGURATION_Handle *cfg,
                                      uint16_t **ports,
                                      unsigned int *nports)
{
  struct UpdateContext uc;
  char *default_config;
 
  uc.system = system;
  uc.cfg = cfg;
  uc.status = GNUNET_OK;
  uc.ports = NULL;
  uc.nports = 0;
  GNUNET_asprintf (&uc.gnunet_home,
                   "%s/%u",
                   system->tmppath,
                   system->path_counter++);
  GNUNET_asprintf (&default_config, "%s/config", uc.gnunet_home);
  GNUNET_CONFIGURATION_set_value_string (cfg,
                                         "PATHS",
                                         "DEFAULTCONFIG",
                                         default_config);
  GNUNET_CONFIGURATION_set_value_string (cfg, "arm", "CONFIG", default_config);
  GNUNET_free (default_config);
  GNUNET_CONFIGURATION_set_value_string (cfg,
                                         "PATHS",
                                         "GNUNET_HOME",
                                         uc.gnunet_home);
  /* make PORTs and UNIXPATHs unique */
  GNUNET_CONFIGURATION_iterate (cfg, &update_config, &uc);
  /* allow connections to services from system trusted_ip host */
  GNUNET_CONFIGURATION_iterate_sections (cfg, &update_config_sections, &uc);
  /* enable loopback-based connections between peers */
  GNUNET_CONFIGURATION_set_value_string (cfg, "nat", "USE_LOCALADDR", "YES");
  GNUNET_free (uc.gnunet_home);
  if ((NULL != ports) && (NULL != nports))
  {
    *ports = uc.ports;
    *nports = uc.nports;
  }
  else
    GNUNET_free (uc.ports);
  return uc.status;
}
 
 
int
GNUNET_TESTING_configuration_create (struct GNUNET_TESTING_System *system,
                                     struct GNUNET_CONFIGURATION_Handle *cfg)
{
  return GNUNET_TESTING_configuration_create_ (system, cfg, NULL, NULL);
}
 
 
struct GNUNET_TESTING_Peer *
GNUNET_TESTING_peer_configure (struct GNUNET_TESTING_System *system,
                               struct GNUNET_CONFIGURATION_Handle *cfg,
                               uint32_t key_number,
                               struct GNUNET_PeerIdentity *id,
                               char **emsg)
{
  struct GNUNET_TESTING_Peer *peer;
  struct GNUNET_DISK_FileHandle *fd;
  char *hostkey_filename;
  char *config_filename;
  char *libexec_binary;
  char *emsg_;
  struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
  uint16_t *ports;
  struct SharedService *ss;
  struct SharedServiceInstance **ss_instances;
  unsigned int cnt;
  unsigned int nports;
 
  ports = NULL;
  nports = 0;
  ss_instances = NULL;
  if (NULL != emsg)
    *emsg = NULL;
  if (key_number >= system->total_hostkeys)
  {
    GNUNET_asprintf (
      &emsg_,
      _ (
        "You attempted to create a testbed with more than %u hosts.  Please precompute more hostkeys first.\n"),
      (unsigned int) system->total_hostkeys);
    goto err_ret;
  }
  pk = NULL;
  if ((NULL != id) &&
      (NULL == (pk = GNUNET_TESTING_hostkey_get (system, key_number, id))))
  {
    GNUNET_asprintf (&emsg_,
                     _ ("Failed to initialize hostkey for peer %u\n"),
                     (unsigned int) key_number);
    goto err_ret;
  }
  if (NULL != pk)
    GNUNET_free (pk);
  if (GNUNET_NO == GNUNET_CONFIGURATION_have_value (cfg, "PEER", "PRIVATE_KEY"))
  {
    GNUNET_asprintf (
      &emsg_,
      _ ("PRIVATE_KEY option in PEER section missing in configuration\n"));
    goto err_ret;
  }
  /* Remove sections for shared services */
  for (cnt = 0; cnt < system->n_shared_services; cnt++)
  {
    ss = &system->shared_services[cnt];
    GNUNET_CONFIGURATION_remove_section (cfg, ss->sname);
  }
  if (GNUNET_OK !=
      GNUNET_TESTING_configuration_create_ (system, cfg, &ports, &nports))
  {
    GNUNET_asprintf (&emsg_,
                     _ ("Failed to create configuration for peer "
                        "(not enough free ports?)\n"));
    goto err_ret;
  }
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_CONFIGURATION_get_value_filename (cfg,
                                                          "PEER",
                                                          "PRIVATE_KEY",
                                                          &hostkey_filename));
  fd = GNUNET_DISK_file_open (hostkey_filename,
                              GNUNET_DISK_OPEN_CREATE | GNUNET_DISK_OPEN_WRITE,
                              GNUNET_DISK_PERM_USER_READ
                              | GNUNET_DISK_PERM_USER_WRITE);
  if (NULL == fd)
  {
    GNUNET_asprintf (&emsg_,
                     _ ("Cannot open hostkey file `%s': %s\n"),
                     hostkey_filename,
                     strerror (errno));
    GNUNET_free (hostkey_filename);
    goto err_ret;
  }
  GNUNET_free (hostkey_filename);
  if (GNUNET_TESTING_HOSTKEYFILESIZE !=
      GNUNET_DISK_file_write (fd,
                              system->hostkeys_data
                              + (key_number * GNUNET_TESTING_HOSTKEYFILESIZE),
                              GNUNET_TESTING_HOSTKEYFILESIZE))
  {
    GNUNET_asprintf (&emsg_,
                     _ ("Failed to write hostkey file for peer %u: %s\n"),
                     (unsigned int) key_number,
                     strerror (errno));
    GNUNET_DISK_file_close (fd);
    goto err_ret;
  }
  GNUNET_DISK_file_close (fd);
  ss_instances = GNUNET_new_array (system->n_shared_services,
                                   struct SharedServiceInstance*);
  for (cnt = 0; cnt < system->n_shared_services; cnt++)
  {
    ss = &system->shared_services[cnt];
    ss_instances[cnt] = associate_shared_service (system, ss, cfg);
    if (NULL == ss_instances[cnt])
    {
      emsg_ = GNUNET_strdup ("FIXME");
      goto err_ret;
    }
  }
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_CONFIGURATION_get_value_filename (cfg,
                                                          "PATHS",
                                                          "DEFAULTCONFIG",
                                                          &config_filename));
  if (GNUNET_OK != GNUNET_CONFIGURATION_write (cfg, config_filename))
  {
    GNUNET_asprintf (&emsg_,
                     _ (
                       "Failed to write configuration file `%s' for peer %u: %s\n"),
                     config_filename,
                     (unsigned int) key_number,
                     strerror (errno));
    GNUNET_free (config_filename);
    goto err_ret;
  }
  peer = GNUNET_new (struct GNUNET_TESTING_Peer);
  peer->ss_instances = ss_instances;
  peer->cfgfile = config_filename; /* Free in peer_destroy */
  peer->cfg = GNUNET_CONFIGURATION_dup (cfg);
  libexec_binary = GNUNET_OS_get_libexec_binary_path ("gnunet-service-arm");
  if (GNUNET_SYSERR ==
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "arm",
                                             "PREFIX",
                                             &peer->main_binary))
  {
    /* No prefix */
    GNUNET_asprintf (&peer->main_binary, "%s", libexec_binary);
    peer->args = GNUNET_strdup ("");
  }
  else
  {
    peer->args = GNUNET_strdup (libexec_binary);
  }
  peer->system = system;
  peer->key_number = key_number;
  GNUNET_free (libexec_binary);
  peer->ports = ports; /* Free in peer_destroy */
  peer->nports = nports;
  return peer;
 
err_ret:
  GNUNET_free (ss_instances);
  GNUNET_free (ports);
  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s", emsg_);
  if (NULL != emsg)
    *emsg = emsg_;
  else
    GNUNET_free (emsg_);
  return NULL;
}
 
 
void
GNUNET_TESTING_peer_get_identity (struct GNUNET_TESTING_Peer *peer,
                                  struct GNUNET_PeerIdentity *id)
{
  if (NULL != peer->id)
  {
    GNUNET_memcpy (id, peer->id, sizeof(struct GNUNET_PeerIdentity));
    return;
  }
  peer->id = GNUNET_new (struct GNUNET_PeerIdentity);
  GNUNET_free_nz (
    GNUNET_TESTING_hostkey_get (peer->system, peer->key_number, peer->id));
  GNUNET_memcpy (id, peer->id, sizeof(struct GNUNET_PeerIdentity));
}
 
 
int
GNUNET_TESTING_peer_start (struct GNUNET_TESTING_Peer *peer)
{
  struct SharedServiceInstance *i;
  unsigned int cnt;
 
  if (NULL != peer->main_process)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  GNUNET_assert (NULL != peer->cfgfile);
  for (cnt = 0; cnt < peer->system->n_shared_services; cnt++)
  {
    i = peer->ss_instances[cnt];
    if ((0 == i->n_refs) &&
        (GNUNET_SYSERR == start_shared_service_instance (i)))
      return GNUNET_SYSERR;
    i->n_refs++;
  }
  peer->main_binary =
    GNUNET_CONFIGURATION_expand_dollar (peer->cfg, peer->main_binary);
  peer->main_process =
    GNUNET_OS_start_process_s (GNUNET_OS_INHERIT_STD_OUT_AND_ERR,
                               NULL,
                               peer->main_binary,
                               peer->args,
                               "-c",
                               peer->cfgfile,
                               NULL);
  if (NULL == peer->main_process)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _ ("Failed to start `%s': %s\n"),
                peer->main_binary,
                strerror (errno));
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}
 
 
int
GNUNET_TESTING_peer_kill (struct GNUNET_TESTING_Peer *peer)
{
  struct SharedServiceInstance *i;
  unsigned int cnt;
 
  if (NULL == peer->main_process)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  if (0 != GNUNET_OS_process_kill (peer->main_process, GNUNET_TERM_SIG))
    return GNUNET_SYSERR;
  for (cnt = 0; cnt < peer->system->n_shared_services; cnt++)
  {
    i = peer->ss_instances[cnt];
    GNUNET_assert (0 != i->n_refs);
    i->n_refs--;
    if (0 == i->n_refs)
      stop_shared_service_instance (i);
  }
  return GNUNET_OK;
}
 
 
int
GNUNET_TESTING_peer_wait (struct GNUNET_TESTING_Peer *peer)
{
  int ret;
 
  if (NULL == peer->main_process)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  ret = GNUNET_OS_process_wait (peer->main_process);
  GNUNET_OS_process_destroy (peer->main_process);
  peer->main_process = NULL;
  return ret;
}
 
 
int
GNUNET_TESTING_peer_stop (struct GNUNET_TESTING_Peer *peer)
{
  if (GNUNET_SYSERR == GNUNET_TESTING_peer_kill (peer))
    return GNUNET_SYSERR;
  if (GNUNET_SYSERR == GNUNET_TESTING_peer_wait (peer))
    return GNUNET_SYSERR;
  return GNUNET_OK;
}
 
 
static void
disconn_status (void *cls, int connected)
{
  struct GNUNET_TESTING_Peer *peer = cls;
 
  if (GNUNET_SYSERR == connected)
  {
    peer->cb (peer->cb_cls, peer, connected);
    return;
  }
  if (GNUNET_YES == connected)
  {
    GNUNET_break (GNUNET_OK == GNUNET_TESTING_peer_kill (peer));
    return;
  }
  GNUNET_break (GNUNET_OK == GNUNET_TESTING_peer_wait (peer));
  GNUNET_ARM_disconnect (peer->ah);
  peer->ah = NULL;
  peer->cb (peer->cb_cls, peer, GNUNET_YES);
}
 
 
int
GNUNET_TESTING_peer_stop_async (struct GNUNET_TESTING_Peer *peer,
                                GNUNET_TESTING_PeerStopCallback cb,
                                void *cb_cls)
{
  if (NULL == peer->main_process)
    return GNUNET_SYSERR;
  peer->ah = GNUNET_ARM_connect (peer->cfg, &disconn_status, peer);
  if (NULL == peer->ah)
    return GNUNET_SYSERR;
  peer->cb = cb;
  peer->cb_cls = cb_cls;
  return GNUNET_OK;
}
 
 
void
GNUNET_TESTING_peer_stop_async_cancel (struct GNUNET_TESTING_Peer *peer)
{
  GNUNET_assert (NULL != peer->ah);
  GNUNET_ARM_disconnect (peer->ah);
  peer->ah = NULL;
}
 
 
void
GNUNET_TESTING_peer_destroy (struct GNUNET_TESTING_Peer *peer)
{
  unsigned int cnt;
 
  if (NULL != peer->main_process)
    GNUNET_TESTING_peer_stop (peer);
  if (NULL != peer->ah)
    GNUNET_ARM_disconnect (peer->ah);
  GNUNET_free (peer->cfgfile);
  if (NULL != peer->cfg)
    GNUNET_CONFIGURATION_destroy (peer->cfg);
  GNUNET_free (peer->main_binary);
  GNUNET_free (peer->args);
  GNUNET_free (peer->id);
  GNUNET_free (peer->ss_instances);
  if (NULL != peer->ports)
  {
    for (cnt = 0; cnt < peer->nports; cnt++)
      GNUNET_TESTING_release_port (peer->system, peer->ports[cnt]);
    GNUNET_free (peer->ports);
  }
  GNUNET_free (peer);
}
 
 
int
GNUNET_TESTING_peer_run (const char *testdir,
                         const char *cfgfilename,
                         GNUNET_TESTING_TestMain tm,
                         void *tm_cls)
{
  return GNUNET_TESTING_service_run (testdir, "arm", cfgfilename, tm, tm_cls);
}
 
 
struct ServiceContext
{
  const struct GNUNET_CONFIGURATION_Handle *cfg;
 
  GNUNET_TESTING_TestMain tm;
 
  struct GNUNET_TESTING_Peer *peer;
 
  void *tm_cls;
};
 
 
static void
service_run_main (void *cls)
{
  struct ServiceContext *sc = cls;
 
  sc->tm (sc->tm_cls, sc->cfg, sc->peer);
}
 
 
int
GNUNET_TESTING_service_run (const char *testdir,
                            const char *service_name,
                            const char *cfgfilename,
                            GNUNET_TESTING_TestMain tm,
                            void *tm_cls)
{
  struct ServiceContext sc;
  struct GNUNET_TESTING_System *system;
  struct GNUNET_TESTING_Peer *peer;
  struct GNUNET_CONFIGURATION_Handle *cfg;
  char *binary;
  char *libexec_binary;
 
  GNUNET_log_setup (testdir, "WARNING", NULL);
  system = GNUNET_TESTING_system_create (testdir, "127.0.0.1", NULL, NULL);
  if (NULL == system)
    return 1;
  cfg = GNUNET_CONFIGURATION_create ();
  if (GNUNET_OK != GNUNET_CONFIGURATION_load (cfg, cfgfilename))
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Failed to load configuration from %s\n"),
         cfgfilename);
    GNUNET_CONFIGURATION_destroy (cfg);
    GNUNET_TESTING_system_destroy (system, GNUNET_YES);
    return 1;
  }
  peer = GNUNET_TESTING_peer_configure (system, cfg, 0, NULL, NULL);
  if (NULL == peer)
  {
    GNUNET_CONFIGURATION_destroy (cfg);
    hostkeys_unload (system);
    GNUNET_TESTING_system_destroy (system, GNUNET_YES);
    return 1;
  }
  GNUNET_free (peer->main_binary);
  GNUNET_free (peer->args);
  GNUNET_asprintf (&binary, "gnunet-service-%s", service_name);
  libexec_binary = GNUNET_OS_get_libexec_binary_path (binary);
  if (GNUNET_SYSERR ==
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             service_name,
                                             "PREFIX",
                                             &peer->main_binary))
  {
    /* No prefix */
    GNUNET_asprintf (&peer->main_binary, "%s", libexec_binary);
    peer->args = GNUNET_strdup ("");
  }
  else
    peer->args = GNUNET_strdup (libexec_binary);
 
  GNUNET_free (libexec_binary);
  GNUNET_free (binary);
  if (GNUNET_OK != GNUNET_TESTING_peer_start (peer))
  {
    GNUNET_TESTING_peer_destroy (peer);
    GNUNET_CONFIGURATION_destroy (cfg);
    GNUNET_TESTING_system_destroy (system, GNUNET_YES);
    return 1;
  }
  sc.cfg = cfg;
  sc.tm = tm;
  sc.tm_cls = tm_cls;
  sc.peer = peer;
  GNUNET_SCHEDULER_run (&service_run_main, &sc);  /* Scheduler loop */
  if ((NULL != peer->main_process) &&
      (GNUNET_OK != GNUNET_TESTING_peer_stop (peer)))
  {
    GNUNET_TESTING_peer_destroy (peer);
    GNUNET_CONFIGURATION_destroy (cfg);
    GNUNET_TESTING_system_destroy (system, GNUNET_YES);
    return 1;
  }
  GNUNET_TESTING_peer_destroy (peer);
  GNUNET_CONFIGURATION_destroy (cfg);
  GNUNET_TESTING_system_destroy (system, GNUNET_YES);
  return 0;
}
 
 
static unsigned int
get_first_value (const char *line)
{
  char *copy;
  size_t slen;
  char *token;
  unsigned int ret;
  char *rest = NULL;
 
  slen = strlen (line) + 1;
  copy = GNUNET_malloc (slen);
  memcpy (copy, line, slen);
  token = strtok_r (copy, ":", &rest);
  token = strtok_r (NULL, ":", &rest);
  GNUNET_assert (1 == sscanf (token, "%u", &ret));
  GNUNET_free (copy);
  return ret;
}
 
 
static char *
get_key (const char *line)
{
  char *copy;
  size_t slen;
  size_t tlen;
  char *token;
  char *ret;
  char *rest = NULL;
 
  slen = strlen (line) + 1;
  copy = GNUNET_malloc (slen);
  memcpy (copy, line, slen);
  token = strtok_r (copy, ":", &rest);
  tlen = strlen (token) + 1;
  ret = GNUNET_malloc (tlen);
  memcpy (ret, token, tlen);
  GNUNET_free (copy);
  return ret;
}
 
 
static char *
get_first_string_value (const char *line)
{
  char *copy;
  size_t slen, slen_token;
  char *token;
  char *ret;
  char *rest = NULL;
 
  slen = strlen (line) + 1;
  copy = GNUNET_malloc (slen);
  memcpy (copy, line, slen);
  token = strtok_r (copy, ":", &rest);
  token = strtok_r (NULL, ":", &rest);
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "first token %s\n",
       token);
  slen_token = strlen (token);
  ret = GNUNET_malloc (slen_token + 1);
  memcpy (ret, token, slen_token + 1);
  GNUNET_free (copy);
  return ret;
}
 
 
static unsigned int
get_second_value (const char *line)
{
  char *copy;
  char *token;
  unsigned int ret;
  char *rest = NULL;
 
  copy = GNUNET_strdup (line);
  token = strtok_r (copy, ":", &rest);
  token = strtok_r (NULL, ":", &rest);
  token = strtok_r (NULL, ":", &rest);
  LOG (GNUNET_ERROR_TYPE_ERROR,
       "Format error in configuration line: %s\n",
       line);
  GNUNET_assert (1 == sscanf (token, "%u", &ret));
  GNUNET_free (copy);
  return ret;
}
 
 
static char *
get_value (const char *key, const char *line)
{
  char copy[strlen (line) + 1];
  size_t slen;
  char *token;
  char *token2;
  char *temp;
  char *rest = NULL;
 
  slen = strlen (line) + 1;
  memcpy (copy, line, slen);
  temp = strstr (copy, key);
  if (NULL == temp)
    return NULL;
  token = strtok_r (temp, ":", &rest);
  if (NULL == token)
    return NULL;
  token = strtok_r (NULL, ":", &rest);
  if (NULL == token)
    return NULL;
  token2 = strtok_r (token, "}", &rest);
  if (NULL == token2)
    return NULL;
  return GNUNET_strdup (token2);
}
 
 
static struct GNUNET_TESTING_NodeConnection *
get_connect_value (const char *line,
                   struct GNUNET_TESTING_NetjailNode *node)
{
  struct GNUNET_TESTING_NodeConnection *node_connection;
  char *copy;
  char *token;
  char *token2;
  unsigned int node_n;
  unsigned int namespace_n;
  char *rest = NULL;
  char *rest2 = NULL;
  struct GNUNET_TESTING_AddressPrefix *prefix;
  unsigned int sscanf_ret;
 
  node_connection = GNUNET_new (struct GNUNET_TESTING_NodeConnection);
  node_connection->node = node;
 
  copy = GNUNET_strdup (line);
  token = strtok_r (copy, ":", &rest);
  if (0 == strcmp ("{K", token))
  {
    node_connection->node_type = GNUNET_TESTING_GLOBAL_NODE;
    token = strtok_r (NULL, ":", &rest);
    GNUNET_assert (1 == sscanf (token, "%u", &node_n));
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "node_n %u\n",
         node_n);
    node_connection->node_n = node_n;
    node_connection->namespace_n = 0;
  }
  else if (0 == strcmp ("{P", token))
  {
    node_connection->node_type = GNUNET_TESTING_SUBNET_NODE;
    token = strtok_r (NULL, ":", &rest);
    errno = 0;
    sscanf_ret = sscanf (token, "%u", &namespace_n);
    if (errno != 0)
    {
      GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "sscanf");
    }
    GNUNET_assert (0 < sscanf_ret);
    node_connection->namespace_n = namespace_n;
    token = strtok_r (NULL, ":", &rest);
    errno = 0;
    sscanf_ret = sscanf (token, "%u", &node_n);
    if (errno != 0)
    {
      GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "sscanf");
    }
    GNUNET_assert (0 < sscanf_ret);
    node_connection->node_n = node_n;
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "node_n %u namespace_n %u node->node_n %u node->namespace_n %u\n",
         node_n,
         namespace_n,
         node->node_n,
         node->namespace_n);
  }
  else
  {
    GNUNET_break (0);
    GNUNET_free (node_connection);
    GNUNET_free (copy);
    return NULL;
  }
 
  while (NULL != (token = strtok_r (NULL, ":", &rest)))
  {
    prefix = GNUNET_new (struct GNUNET_TESTING_AddressPrefix);
    token2 = strtok_r (token, "}", &rest2);
    if (NULL != token2)
      prefix->address_prefix = GNUNET_strdup (token2);
    else
      prefix->address_prefix = GNUNET_strdup (token);
 
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "address_prefix %s\n",
         prefix->address_prefix);
 
    GNUNET_CONTAINER_DLL_insert (node_connection->address_prefixes_head,
                                 node_connection->address_prefixes_tail,
                                 prefix);
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "address_prefix %s\n",
         prefix->address_prefix);
  }
 
  GNUNET_free (copy);
  return node_connection;
}
 
 
static void
node_connections (const char *line, struct GNUNET_TESTING_NetjailNode *node)
{
  char *value, *value2;
  char *temp;
  char *copy;
  char *rest = NULL;
  char *rest2 = NULL;
  struct GNUNET_TESTING_NodeConnection *node_connection;
 
 
  temp = strstr (line, "connect");
  if (NULL != temp)
  {
    copy = GNUNET_strdup (temp);
    strtok_r (copy, ":", &rest);
    value = strtok_r (rest, "|", &rest2);
 
    while (NULL != value)
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "node_connections value %s\n",
           value);
      node_connection = get_connect_value (value, node);
      if (NULL == node_connection)
      {
        LOG (GNUNET_ERROR_TYPE_WARNING,
             "connect key was not expected in this configuration line: %s\n",
             line);
        break;
      }
      GNUNET_CONTAINER_DLL_insert (node->node_connections_head,
                                   node->node_connections_tail,
                                   node_connection);
      value2 = strstr (value, "}}");
      if (NULL != value2)
        break;
      value = strtok_r (NULL, "|", &rest2);
 
    }
    GNUNET_free (copy);
  }
}
 
 
static int
log_nodes (void *cls, const struct GNUNET_ShortHashCode *id, void *value)
{
  struct GNUNET_TESTING_NetjailNode *node = value;
  struct GNUNET_TESTING_NodeConnection *pos_connection;
  struct GNUNET_TESTING_AddressPrefix *pos_prefix;
 
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "plugin: %s space: %u node: %u global: %u\n",
       node->plugin,
       node->namespace_n,
       node->node_n,
       node->is_global);
 
  for (pos_connection = node->node_connections_head; NULL != pos_connection;
       pos_connection = pos_connection->next)
  {
 
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "namespace_n: %u node_n: %u node_type: %u\n",
         pos_connection->namespace_n,
         pos_connection->node_n,
         pos_connection->node_type);
 
    for (pos_prefix = pos_connection->address_prefixes_head; NULL != pos_prefix;
         pos_prefix =
           pos_prefix->next)
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "prefix: %s\n",
           pos_prefix->address_prefix);
    }
  }
  return GNUNET_YES;
}
 
 
static int
log_namespaces (void *cls, const struct GNUNET_ShortHashCode *id, void *value)
{
  struct GNUNET_TESTING_NetjailNamespace *namespace = value;
 
  GNUNET_CONTAINER_multishortmap_iterate (namespace->nodes, &log_nodes, NULL);
  return GNUNET_YES;
}
 
 
static int
log_topo (const struct GNUNET_TESTING_NetjailTopology *topology)
{
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "plugin: %s spaces: %u nodes: %u known: %u\n",
       topology->plugin,
       topology->namespaces_n,
       topology->nodes_m,
       topology->nodes_x);
 
  GNUNET_CONTAINER_multishortmap_iterate (topology->map_namespaces,
                                          log_namespaces, NULL);
  GNUNET_CONTAINER_multishortmap_iterate (topology->map_globals, &log_nodes,
                                          NULL);
  return GNUNET_YES;
}
 
 
static void
get_node_info (unsigned int num,
               const struct GNUNET_TESTING_NetjailTopology *topology,
               struct GNUNET_TESTING_NetjailNode **node_ex,
               struct GNUNET_TESTING_NetjailNamespace **namespace_ex,
               struct GNUNET_TESTING_NodeConnection **node_connections_ex)
{
  struct GNUNET_ShortHashCode hkey;
  struct GNUNET_HashCode hc;
  unsigned int namespace_n;
  unsigned int node_m;
  struct GNUNET_TESTING_NetjailNode *node;
  struct GNUNET_TESTING_NetjailNamespace *namespace;
  struct GNUNET_TESTING_NodeConnection *node_connections = NULL;
 
  log_topo (topology);
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "num: %u \n",
       num);
  if (topology->nodes_x >= num)
  {
 
    GNUNET_CRYPTO_hash (&num, sizeof(num), &hc);
    memcpy (&hkey,
            &hc,
            sizeof (hkey));
    node = GNUNET_CONTAINER_multishortmap_get (topology->map_globals,
                                               &hkey);
    if (NULL != node)
    {
      *node_ex = node;
      *node_connections_ex = node->node_connections_head;
    }
  }
  else
  {
    namespace_n = (unsigned int) ceil ((double) (num - topology->nodes_x)
                                       / topology->nodes_m);
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "ceil num: %u nodes_x: %u nodes_m: %u namespace_n: %u\n",
         num,
         topology->nodes_x,
         topology->nodes_m,
         namespace_n);
    GNUNET_CRYPTO_hash (&namespace_n, sizeof(namespace_n), &hc);
    memcpy (&hkey,
            &hc,
            sizeof (hkey));
    namespace = GNUNET_CONTAINER_multishortmap_get (topology->map_namespaces,
                                                    &hkey);
    if (NULL != namespace)
    {
      node_m = num - topology->nodes_x - topology->nodes_m * (namespace_n - 1);
      GNUNET_CRYPTO_hash (&node_m, sizeof(node_m), &hc);
      memcpy (&hkey,
              &hc,
              sizeof (hkey));
      node = GNUNET_CONTAINER_multishortmap_get (namespace->nodes,
                                                 &hkey);
      if (NULL != node)
      {
        LOG (GNUNET_ERROR_TYPE_DEBUG,
             "node additional_connects: %u %p\n",
             node->additional_connects,
             node);
        node_connections = node->node_connections_head;
      }
      *node_ex = node;
      *namespace_ex = namespace;
      *node_connections_ex = node_connections;
    }
  }
}
 
 
struct GNUNET_TESTING_NetjailNode *
GNUNET_TESTING_get_node (unsigned int num,
                         struct GNUNET_TESTING_NetjailTopology *topology)
{
  struct GNUNET_TESTING_NetjailNode *node;
  struct GNUNET_TESTING_NetjailNamespace *namespace;
  struct GNUNET_TESTING_NodeConnection *node_connections;
 
  get_node_info (num, topology, &node, &namespace, &node_connections);
 
  return node;
 
}
 
 
struct GNUNET_TESTING_NodeConnection *
GNUNET_TESTING_get_connections (unsigned int num,
                                const struct
                                GNUNET_TESTING_NetjailTopology *topology)
{
  struct GNUNET_TESTING_NetjailNode *node;
  struct GNUNET_TESTING_NetjailNamespace *namespace;
  struct GNUNET_TESTING_NodeConnection *node_connections;
 
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "get_connections\n");
 
  get_node_info (num, topology, &node, &namespace, &node_connections);
 
  return node_connections;
}
 
 
struct GNUNET_PeerIdentity *
GNUNET_TESTING_get_peer (unsigned int num,
                         const struct GNUNET_TESTING_System *tl_system)
{
  struct GNUNET_PeerIdentity *peer = GNUNET_new (struct GNUNET_PeerIdentity);
  struct GNUNET_CRYPTO_EddsaPrivateKey *priv_key;
 
  priv_key = GNUNET_TESTING_hostkey_get (tl_system,
                                         num,
                                         peer);
 
  GNUNET_CRYPTO_eddsa_key_get_public (priv_key,
                                      &peer->public_key);
  GNUNET_free (priv_key);
  return peer;
}
 
 
int
free_nodes_cb (void *cls,
               const struct GNUNET_ShortHashCode *key,
               void *value)
{
  (void) cls;
  struct GNUNET_TESTING_NetjailNode *node = value;
  struct GNUNET_TESTING_NodeConnection *pos_connection;
  struct GNUNET_TESTING_AddressPrefix *pos_prefix;
 
  while (NULL != (pos_connection = node->node_connections_head))
  {
    while (NULL != (pos_prefix = pos_connection->address_prefixes_head))
    {
      GNUNET_CONTAINER_DLL_remove (pos_connection->address_prefixes_head,
                                   pos_connection->address_prefixes_tail,
                                   pos_prefix);
      GNUNET_free (pos_prefix->address_prefix);
      GNUNET_free (pos_prefix);
    }
    GNUNET_CONTAINER_DLL_remove (node->node_connections_head,
                                 node->node_connections_tail,
                                 pos_connection);
    GNUNET_free (pos_connection);
  }
 
  GNUNET_free (node->plugin);
  GNUNET_free (node);
  return GNUNET_OK;
}
 
 
int
free_namespaces_cb (void *cls,
                    const struct GNUNET_ShortHashCode *key,
                    void *value)
{
  (void) cls;
  struct GNUNET_TESTING_NetjailNamespace *namespace = value;
 
  GNUNET_free (namespace->router);
  GNUNET_CONTAINER_multishortmap_iterate (namespace->nodes, free_nodes_cb,
                                          namespace->nodes);
  return GNUNET_OK;
 
}
 
 
void
GNUNET_TESTING_free_topology (struct GNUNET_TESTING_NetjailTopology *topology)
{
  GNUNET_CONTAINER_multishortmap_iterate (topology->map_namespaces,
                                          free_namespaces_cb, NULL);
  GNUNET_CONTAINER_multishortmap_destroy (topology->map_namespaces);
  GNUNET_CONTAINER_multishortmap_iterate (topology->map_globals, free_nodes_cb,
                                          NULL);
  GNUNET_CONTAINER_multishortmap_destroy (topology->map_globals);
  GNUNET_free (topology->plugin);
  GNUNET_free (topology);
}
 
 
unsigned int
GNUNET_TESTING_calculate_num (
  struct GNUNET_TESTING_NodeConnection *node_connection,
  struct GNUNET_TESTING_NetjailTopology *topology)
{
  unsigned int n, m, num;
 
  n = node_connection->namespace_n;
  m = node_connection->node_n;
 
  if (0 == n)
    num = m;
  else
    num = (n - 1) * topology->nodes_m + m + topology->nodes_x;
 
  return num;
}
 
 
char *
GNUNET_TESTING_get_address (struct GNUNET_TESTING_NodeConnection *connection,
                            const char *prefix)
{
  struct GNUNET_TESTING_NetjailNode *node;
  char *addr;
  char *template;
  unsigned int node_n;
 
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "get address prefix: %s node_n: %u\n",
       prefix,
       connection->node_n);
 
  node = connection->node;
  if (connection->namespace_n == node->namespace_n)
  {
    template = CONNECT_ADDRESS_TEMPLATE;
    node_n = connection->node_n;
  }
  else if (0 == connection->namespace_n)
  {
    template = KNOWN_CONNECT_ADDRESS_TEMPLATE;
    node_n = connection->node_n;
  }
  else if (1 == connection->node_n)
  {
    template = ROUTER_CONNECT_ADDRESS_TEMPLATE;
    node_n = connection->namespace_n;
  }
  else
  {
    return NULL;
  }
 
  if (0 == strcmp (PREFIX_TCP, prefix) ||
      0 == strcmp (PREFIX_UDP, prefix) ||
      0 == strcmp (PREFIX_UDP_NATTED, prefix) ||
      0 == strcmp (PREFIX_TCP_NATTED, prefix))
  {
    GNUNET_asprintf (&addr,
                     template,
                     prefix,
                     node_n);
  }
  else
  {
    GNUNET_assert (0);
  }
 
  return addr;
}
 
 
unsigned int
GNUNET_TESTING_get_additional_connects (unsigned int num,
                                        struct GNUNET_TESTING_NetjailTopology *
                                        topology)
{
  struct GNUNET_TESTING_NetjailNode *node;
  struct GNUNET_TESTING_NetjailNamespace *namespace;
  struct GNUNET_TESTING_NodeConnection *node_connections;
 
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "get_additional_connects\n");
 
  get_node_info (num, topology, &node, &namespace, &node_connections);
 
  if (NULL == node)
  {
    LOG (GNUNET_ERROR_TYPE_WARNING,
         "No info found for node %d\n", num);
    return 0;
  }
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "node additional_connects for node %p\n",
       node);
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "node additional_connects: %u\n",
       node->additional_connects);
 
  return node->additional_connects;
}
 
 
static void
parse_ac (struct GNUNET_TESTING_NetjailNode *p_node, const char *token)
{
  char *ac_value;
  int ret;
 
  ac_value = get_value ("AC", token);
  if (NULL != ac_value)
  {
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "ac value: %s\n",
         ac_value);
    errno = 0;
    ret = sscanf (ac_value, "%u", &p_node->additional_connects);
    if (errno != 0)
    {
      GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "sscanf");
    }
    GNUNET_assert (0 < ret);
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "AC %u\n",
         p_node->additional_connects);
  }
  else
  {
    p_node->additional_connects = 0;
  }
  GNUNET_free (ac_value);
}
 
 
struct GNUNET_TESTING_NetjailTopology *
GNUNET_TESTING_get_topo_from_string (const char *input)
{
  char *token;
  char *key = NULL;
  unsigned int out;
  char *rest = NULL;
  char *value = NULL;
  char *value2;
  char *data;
  int ret;
  struct GNUNET_TESTING_NetjailTopology *topo;
  struct GNUNET_TESTING_NetjailRouter *router;
  struct GNUNET_TESTING_NetjailNamespace *namespace;
  struct GNUNET_HashCode hc;
 
  data = GNUNET_strdup (input);
  token = strtok_r (data, "\n", &rest);
  topo = GNUNET_new (struct GNUNET_TESTING_NetjailTopology);
  topo->map_namespaces =
    GNUNET_CONTAINER_multishortmap_create (1,GNUNET_NO);
  topo->map_globals =
    GNUNET_CONTAINER_multishortmap_create (1,GNUNET_NO);
 
  while (NULL != token)
  {
    if (NULL != key)
      GNUNET_free (key);
    key = get_key (token);
    LOG (GNUNET_ERROR_TYPE_DEBUG,
         "In the loop with token: %s beginning with %s\n",
         token,
         key);
    if (0 == strcmp (key, "M"))
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for M.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "M: %u\n",
           out);
      topo->nodes_m = out;
    }
    else if (0 == strcmp (key, "N"))
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for N.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "N: %u\n",
           out);
      topo->namespaces_n = out;
    }
    else if (0 == strcmp (key, "X"))
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for X.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "X: %u\n",
           out);
      topo->nodes_x = out;
    }
    else if (0 == strcmp (key, "AC"))
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for AC.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "AC: %u\n",
           out);
      topo->additional_connects = out;
    }
    else if (0 == strcmp (key, "T"))
    {
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first string value for T.\n");
      value = get_first_string_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "value: %s\n",
           value);
      topo->plugin = value;
    }
    else if (0 == strcmp (key, "K"))
    {
      struct GNUNET_ShortHashCode hkey_k;
      struct GNUNET_TESTING_NetjailNode *k_node = GNUNET_new (struct
                                                              GNUNET_TESTING_NetjailNode);
 
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for K.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "K: %u\n",
           out);
      k_node->node_n = out;
      GNUNET_CRYPTO_hash (&out, sizeof(out), &hc);
      memcpy (&hkey_k,
              &hc,
              sizeof (hkey_k));
      k_node->is_global = GNUNET_YES;
 
      if (GNUNET_YES == GNUNET_CONTAINER_multishortmap_contains (
            topo->map_globals,
            &hkey_k))
        GNUNET_break (0);
      else
        GNUNET_CONTAINER_multishortmap_put (topo->map_globals,
                                            &hkey_k,
                                            k_node,
                                            GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get value for key value on K.\n");
      value = get_value ("plugin", token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "value: %s\n",
           value);
      k_node->plugin = value;
      parse_ac (k_node, token);
      node_connections (token, k_node);
      GNUNET_free (value);
    }
    else if (0 == strcmp (key, "R"))
    {
      struct GNUNET_ShortHashCode hkey_r;
      router = GNUNET_new (struct GNUNET_TESTING_NetjailRouter);
 
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for R.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "R: %u\n",
           out);
      GNUNET_CRYPTO_hash (&out, sizeof(out), &hc);
      memcpy (&hkey_r,
              &hc,
              sizeof (hkey_r));
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get value for key tcp_port on R.\n");
      value = get_value ("tcp_port", token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "tcp_port: %s\n",
           value);
      ret = sscanf (value, "%u", &(router->tcp_port));
      GNUNET_free (value);
      GNUNET_break (0 != ret && 1 >= router->tcp_port);
 
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get value for key udp_port on R.\n");
      value2 = get_value ("udp_port", token);
      ret = sscanf (value2, "%u", &(router->udp_port));
      GNUNET_free (value2);
      GNUNET_break (0 != ret && 1 >= router->udp_port);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "udp_port: %s\n",
           value2);
      GNUNET_free (value2);
      if (GNUNET_YES == GNUNET_CONTAINER_multishortmap_contains (
            topo->map_namespaces,
            &hkey_r))
      {
        namespace = GNUNET_CONTAINER_multishortmap_get (topo->map_namespaces,
                                                        &hkey_r);
      }
      else
      {
        namespace = GNUNET_new (struct GNUNET_TESTING_NetjailNamespace);
        namespace->namespace_n = out;
        namespace->nodes = GNUNET_CONTAINER_multishortmap_create (1,GNUNET_NO);
        GNUNET_CONTAINER_multishortmap_put (topo->map_namespaces,
                                            &hkey_r,
                                            namespace,
                                            GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
      }
      namespace->router = router;
 
    }
    else if (0 == strcmp (key, "P"))
    {
      struct GNUNET_TESTING_NetjailNode *p_node = GNUNET_new (struct
                                                              GNUNET_TESTING_NetjailNode);
      struct GNUNET_ShortHashCode hkey_p;
 
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get first Value for P.\n");
      out = get_first_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "P: %u\n",
           out);
      GNUNET_CRYPTO_hash (&out, sizeof(out), &hc);
      memcpy (&hkey_p,
              &hc,
              sizeof (hkey_p));
 
      if (GNUNET_YES == GNUNET_CONTAINER_multishortmap_contains (
            topo->map_namespaces,
            &hkey_p))
      {
        namespace = GNUNET_CONTAINER_multishortmap_get (topo->map_namespaces,
                                                        &hkey_p);
      }
      else
      {
        namespace = GNUNET_new (struct GNUNET_TESTING_NetjailNamespace);
        namespace->nodes = GNUNET_CONTAINER_multishortmap_create (1,GNUNET_NO);
        namespace->namespace_n = out;
        GNUNET_CONTAINER_multishortmap_put (topo->map_namespaces,
                                            &hkey_p,
                                            namespace,
                                            GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
      }
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get second Value for P.\n");
      out = get_second_value (token);
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "P: %u\n",
           out);
      GNUNET_CRYPTO_hash (&out, sizeof(out), &hc);
      memcpy (&hkey_p,
              &hc,
              sizeof (hkey_p));
      if (GNUNET_YES == GNUNET_CONTAINER_multishortmap_contains (
            namespace->nodes,
            &hkey_p))
      {
        GNUNET_break (0);
      }
      else
      {
 
        GNUNET_CONTAINER_multishortmap_put (namespace->nodes,
                                            &hkey_p,
                                            p_node,
                                            GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
        LOG (GNUNET_ERROR_TYPE_DEBUG,
             "Get value for key plugin on P.\n");
        value = get_value ("plugin", token);
        if (NULL != value)
        {
          LOG (GNUNET_ERROR_TYPE_DEBUG,
               "plugin: %s\n",
               value);
          p_node->plugin = value;
        }
        p_node->node_n = out;
        p_node->namespace_n = namespace->namespace_n;
      }
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Get AC Value for P.\n");
      parse_ac (p_node, token);
      node_connections (token, p_node);
    }
    token = strtok_r (NULL, "\n", &rest);
    if (NULL != token)
      LOG (GNUNET_ERROR_TYPE_DEBUG,
           "Next token %s\n",
           token);
  }
  if (NULL != key)
    GNUNET_free (key);
  GNUNET_free (data);
  return topo;
}
 
 
struct GNUNET_TESTING_NetjailTopology *
GNUNET_TESTING_get_topo_from_file (const char *filename)
{
  uint64_t fs;
  char *data;
  struct GNUNET_TESTING_NetjailTopology *topo;
 
  if (GNUNET_YES != GNUNET_DISK_file_test (filename))
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Topology file %s not found\n"),
         filename);
    return NULL;
  }
  if (GNUNET_OK !=
      GNUNET_DISK_file_size (filename, &fs, GNUNET_YES, GNUNET_YES))
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Topology file %s has no data\n"),
         filename);
    return NULL;
  }
  data = GNUNET_malloc (fs + 1);
  if (fs != GNUNET_DISK_fn_read (filename, data, fs))
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _ ("Topology file %s cannot be read\n"),
         filename);
    GNUNET_free (data);
    return NULL;
  }
 
  LOG (GNUNET_ERROR_TYPE_DEBUG,
       "file length %" PRIu64 "\n",
       fs);
  data[fs] = '\0';
 
  topo = GNUNET_TESTING_get_topo_from_string (data);
 
  GNUNET_free (data);
 
  return topo;
}
 
 
/* end of testing.c */