external/uhub
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Added support for dynamic commands.

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Dynamic commands are user commands that can be added dynamically to
the hub by a plugin.

The example plugin (mod_example.c) adds a !example command that when
invoked send a message to the user who invoked it.
This commit is contained in:
Jan Vidar Krey
2011-12-09 10:29:50 +01:00
parent 78ed83840b
commit 318163c066
23 changed files with 907 additions and 461 deletions
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69
src/core/pluginloader.c
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@@ -1,6 +1,6 @@
/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2010, Jan Vidar Krey
* Copyright (C) 2007-2011, Jan Vidar Krey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -22,6 +22,23 @@
#ifdef PLUGIN_SUPPORT
#include "plugin_api/handle.h"
struct plugin_callback_data;
struct plugin_hub_internals
{
struct hub_info* hub;
plugin_unregister_f unregister; /* The unregister function. */
struct plugin_callback_data* callback_data; /* callback data that is unique for the plugin */
};
static struct plugin_hub_internals* get_internals(struct plugin_handle* handle)
{
struct plugin_hub_internals* internals;
assert(handle && handle->handle && handle->handle->internals);
internals = (struct plugin_hub_internals*) handle->handle->internals;
return internals;
}
struct uhub_plugin* plugin_open(const char* filename)
{
struct uhub_plugin* plugin;
@@ -51,12 +68,14 @@ struct uhub_plugin* plugin_open(const char* filename)
}
plugin->filename = strdup(filename);
plugin->internals = hub_malloc_zero(sizeof(struct plugin_hub_internals));
return plugin;
}
void plugin_close(struct uhub_plugin* plugin)
{
LOG_TRACE("plugin_close: \"%s\"", plugin->filename);
hub_free(plugin->internals);
#ifdef HAVE_DLOPEN
dlclose(plugin->handle);
#else
@@ -77,13 +96,16 @@ void* plugin_lookup_symbol(struct uhub_plugin* plugin, const char* symbol)
#endif
}
struct plugin_handle* plugin_load(const char* filename, const char* config)
struct plugin_handle* plugin_load(const char* filename, const char* config, struct hub_info* hub)
{
plugin_register_f register_f;
plugin_unregister_f unregister_f;
int ret;
struct plugin_handle* handle = hub_malloc_zero(sizeof(struct plugin_handle));
struct plugin_handle* handle = (struct plugin_handle*) hub_malloc_zero(sizeof(struct plugin_handle));
struct uhub_plugin* plugin = plugin_open(filename);
struct plugin_hub_internals* internals = (struct plugin_hub_internals*) plugin->internals;
if (!plugin)
return NULL;
@@ -98,6 +120,14 @@ struct plugin_handle* plugin_load(const char* filename, const char* config)
register_f = plugin_lookup_symbol(plugin, "plugin_register");
unregister_f = plugin_lookup_symbol(plugin, "plugin_unregister");
// register hub internals
internals->unregister = unregister_f;
internals->hub = hub;
internals->callback_data = plugin_callback_data_create();
// setup callback functions, where the plugin can contact the hub.
plugin_register_callback_functions(handle);
if (register_f && unregister_f)
{
ret = register_f(handle, config);
@@ -107,7 +137,6 @@ struct plugin_handle* plugin_load(const char* filename, const char* config)
{
LOG_INFO("Loaded plugin: %s: %s, version %s.", filename, handle->name, handle->version);
LOG_TRACE("Plugin API version: %d (func table size: " PRINTF_SIZE_T ")", handle->plugin_api_version, handle->plugin_funcs_size);
plugin->unregister = unregister_f;
return handle;
}
else
@@ -128,16 +157,19 @@ struct plugin_handle* plugin_load(const char* filename, const char* config)
void plugin_unload(struct plugin_handle* plugin)
{
plugin->handle->unregister(plugin);
struct plugin_hub_internals* internals = get_internals(plugin);
plugin_unregister_callback_functions(plugin);
internals->unregister(plugin);
plugin_close(plugin->handle);
hub_free(plugin);
}
static int plugin_parse_line(char* line, int line_count, void* ptr_data)
{
struct uhub_plugins* handle = (struct uhub_plugins*) ptr_data;
struct plugin_handle* plugin;
struct hub_info* hub = (struct hub_info*) ptr_data;
struct uhub_plugins* handle = hub->plugins;
struct cfg_tokens* tokens = cfg_tokenize(line);
struct plugin_handle* plugin;
char *directive, *soname, *params;
if (cfg_token_count(tokens) == 0)
@@ -162,7 +194,7 @@ static int plugin_parse_line(char* line, int line_count, void* ptr_data)
params = "";
LOG_TRACE("Load plugin: \"%s\", params=\"%s\"", soname, params);
plugin = plugin_load(soname, params);
plugin = plugin_load(soname, params, hub);
if (plugin)
{
list_append(handle->loaded, plugin);
@@ -175,12 +207,12 @@ static int plugin_parse_line(char* line, int line_count, void* ptr_data)
return -1;
}
int plugin_initialize(struct hub_config* config, struct uhub_plugins* handle)
int plugin_initialize(struct hub_config* config, struct hub_info* hub)
{
int ret;
handle->loaded = list_create();
if (!handle->loaded)
hub->plugins->loaded = list_create();
if (!hub->plugins->loaded)
return -1;
if (config)
@@ -188,12 +220,12 @@ int plugin_initialize(struct hub_config* config, struct uhub_plugins* handle)
if (!*config->file_plugins)
return 0;
ret = file_read_lines(config->file_plugins, handle, &plugin_parse_line);
ret = file_read_lines(config->file_plugins, hub, &plugin_parse_line);
if (ret == -1)
{
list_clear(handle->loaded, hub_free);
list_destroy(handle->loaded);
handle->loaded = 0;
list_clear(hub->plugins->loaded, hub_free);
list_destroy(hub->plugins->loaded);
hub->plugins->loaded = 0;
return -1;
}
}
@@ -213,4 +245,11 @@ void plugin_shutdown(struct uhub_plugins* handle)
list_destroy(handle->loaded);
}
// Used internally only
struct hub_info* plugin_get_hub(struct plugin_handle* plugin)
{
struct plugin_hub_internals* data = get_internals(plugin);
return data->hub;
}
#endif /* PLUGIN_SUPPORT */