gnunet-peerinfo_plugins.c File Reference

plugin management More...

#include "platform.h"
#include "gnunet-peerinfo_plugins.h"
#include "gnunet_transport_plugin.h"
#include "gnunet_hello_lib.h"

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Data Structures
struct	TransportPlugin
	Entry in doubly-linked list of all of our plugins. More...

Functions
void	GPI_plugins_load (const struct GNUNET_CONFIGURATION_Handle *cfg)
	Load and initialize all plugins. More...
void	GPI_plugins_unload ()
	Unload all plugins. More...
struct GNUNET_TRANSPORT_PluginFunctions *	GPI_plugins_find (const char *name)
	Obtain the plugin API based on a plugin name. More...

Variables
static struct TransportPlugin *	plugins_head
	Head of DLL of all loaded plugins. More...
static struct TransportPlugin *	plugins_tail
	Head of DLL of all loaded plugins. More...

Detailed Description

plugin management

Author

Christian Grothoff

Definition in file gnunet-peerinfo_plugins.c.

Function Documentation

GPI_plugins_load()

void GPI_plugins_load

(

const struct GNUNET_CONFIGURATION_Handle *

cfg

)

Load and initialize all plugins.

Load transport plugins.

The respective functions will be invoked by the plugins when the respective events happen. The closure will be set to a 'const char*' containing the name of the plugin that caused the call.

Parameters

cfg	configuration to use

Definition at line 89 of file gnunet-peerinfo_plugins.c.

{
  struct TransportPlugin *plug;
  struct TransportPlugin *next;
  char *libname;
  char *plugs;
  char *pos;
 
  if (NULL != plugins_head)
    return; /* already loaded */
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg, "TRANSPORT", "PLUGINS",
                                             &plugs))
    return;
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, _ ("Starting transport plugins `%s'\n"),
              plugs);
  for (pos = strtok (plugs, " "); pos != NULL; pos = strtok (NULL, " "))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO, _ ("Loading `%s' transport plugin\n"),
                pos);
    GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", pos);
    plug = GNUNET_new (struct TransportPlugin);
    plug->short_name = GNUNET_strdup (pos);
    plug->lib_name = libname;
    plug->env.cfg = cfg;
    plug->env.cls = plug->short_name;
    GNUNET_CONTAINER_DLL_insert (plugins_head, plugins_tail, plug);
  }
  GNUNET_free (plugs);
  next = plugins_head;
  while (next != NULL)
  {
    plug = next;
    next = plug->next;
    plug->api = GNUNET_PLUGIN_load (plug->lib_name, &plug->env);
    if (plug->api == NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  _ ("Failed to load transport plugin for `%s'\n"),
                  plug->lib_name);
      GNUNET_CONTAINER_DLL_remove (plugins_head, plugins_tail, plug);
      GNUNET_free (plug->short_name);
      GNUNET_free (plug->lib_name);
      GNUNET_free (plug);
    }
  }
}

References _, TransportPlugin::api, cfg, GNUNET_TRANSPORT_PluginEnvironment::cfg, GNUNET_TRANSPORT_PluginEnvironment::cls, TransportPlugin::env, GNUNET_asprintf(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_log, GNUNET_new, GNUNET_OK, GNUNET_PLUGIN_load(), GNUNET_strdup, TransportPlugin::lib_name, TransportPlugin::next, plugins_head, plugins_tail, and TransportPlugin::short_name.

Referenced by libgnunet_plugin_dhtu_gnunet_init(), and state_machine().

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GPI_plugins_unload()

void GPI_plugins_unload

(

void

)

Unload all plugins.

Definition at line 142 of file gnunet-peerinfo_plugins.c.

{
  struct TransportPlugin *plug;
 
  while (NULL != (plug = plugins_head))
  {
    GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
    GNUNET_free (plug->lib_name);
    GNUNET_free (plug->short_name);
    GNUNET_CONTAINER_DLL_remove (plugins_head, plugins_tail, plug);
    GNUNET_free (plug);
  }
}

References TransportPlugin::api, GNUNET_break, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_PLUGIN_unload(), TransportPlugin::lib_name, plugins_head, plugins_tail, and TransportPlugin::short_name.

Referenced by libgnunet_plugin_dhtu_gnunet_done(), and shutdown_task().

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GPI_plugins_find()

struct GNUNET_TRANSPORT_PluginFunctions* GPI_plugins_find

(

const char *

name

)

Obtain the plugin API based on a plugin name.

Parameters

name	name of the plugin

Returns

the plugin's API, NULL if the plugin is not loaded

Definition at line 164 of file gnunet-peerinfo_plugins.c.

{
  struct TransportPlugin *head = plugins_head;
 
  char *stripped = GNUNET_strdup (name);
  char *head_stripped;
  char *sep = strchr (stripped, '_');
 
  if (NULL != sep)
    sep[0] = '\0';
 
  while (head != NULL)
  {
    head_stripped = GNUNET_strdup (head->short_name);
    char *head_sep = strchr (head_stripped, '_');
    if (NULL != head_sep)
      head_sep[0] = '\0';
    if (0 == strcmp (head_stripped, stripped))
    {
      GNUNET_free (head_stripped);
      break;
    }
    GNUNET_free (head_stripped);
    head = head->next;
  }
  GNUNET_free (stripped);
  if (NULL == head)
    return NULL;
  return head->api;
}

References GNUNET_free, GNUNET_strdup, head, name, PendingResolutions::next, and plugins_head.

Referenced by gnunet_try_connect(), parse_hello_uri(), peerinfo_cb(), and print_my_uri().

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Variable Documentation

plugins_head

struct TransportPlugin* plugins_head

static

Head of DLL of all loaded plugins.

Definition at line 72 of file gnunet-peerinfo_plugins.c.

Referenced by GPI_plugins_find(), GPI_plugins_load(), and GPI_plugins_unload().

plugins_tail

struct TransportPlugin* plugins_tail

static

Head of DLL of all loaded plugins.

Definition at line 77 of file gnunet-peerinfo_plugins.c.

Referenced by GPI_plugins_load(), and GPI_plugins_unload().