mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-23 00:00:06 +01:00
d98101d1e3
Move the common plugin scanning dir stuff to be based on lws_dir, which already builds for windows. Previously this was done via dirent for unix and libuv for windows. Reduce the dl plat stuff to just wrap instantiation and destruction of dynlibs, establish common code in lib/misc/dir.c for plugin scanning itself. Migrate the libuv windows dl stuff to windows-plugins.c, so that he's available even if later libuv loop support becomes and event lib plugin. Remove the existing api exports scheme for plugins, just export a const struct now which has a fixed header type but then whatever you want afterwards depending on the class / purpose of the plugin. Place a "class" string in the header so there can be different kinds of plugins implying different types exported. Make the plugin apis public and add support for filter by class string, and per instantation / destruction callbacks so the subclassed header type can do its thing for the plugin class. The user provides a linked-list base for his class of plugins, so he can manage them completely separately and in user code / user export types. Rip out some last hangers-on from generic sessions / tables. This is all aimed at making the plugins support general enough so it can provide event lib plugins later.
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
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#define _WINSOCK_DEPRECATED_NO_WARNINGS
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#endif
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#include "private-lib-core.h"
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#if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
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const lws_plugin_header_t *
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lws_plat_dlopen(struct lws_plugin **pplugin, const char *libpath,
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const char *sofilename, const char *_class,
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each_plugin_cb_t each, void *each_user)
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{
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const lws_plugin_header_t *hdr;
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struct lws_plugin *pin;
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char sym[96], *dot;
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uv_lib_t lib;
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void *v;
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int m;
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lib.errmsg = NULL;
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lib.handle = NULL;
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if (uv_dlopen(libpath, &lib)) {
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uv_dlerror(&lib);
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lwsl_err("Error loading DSO: %s\n", lib.errmsg);
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uv_dlclose(&lib);
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return NULL;
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}
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/* we could open it... can we get his export struct? */
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m = lws_snprintf(sym, sizeof(sym) - 1, "%s", sofilename);
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if (m < 4)
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goto bail;
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dot = strchr(sym, '.');
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if (dot)
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*dot = '\0'; /* snip the .so or .lib or what-have-you*/
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if (uv_dlsym(&lib, sym, &v)) {
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uv_dlerror(&lib);
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lwsl_err("%s: Failed to get '%s' on %s: %s\n",
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__func__, path, dent.name, lib.errmsg);
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goto bail;
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}
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hdr = (const lws_plugin_header_t *)v;
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if (hdr->api_magic != LWS_PLUGIN_API_MAGIC) {
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lwsl_err("%s: plugin %s has outdated api %d (vs %d)\n",
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__func__, libpath, hdr->api_magic,
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LWS_PLUGIN_API_MAGIC);
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goto bail;
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}
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if (strcmp(hdr->_class, _class))
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goto bail;
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pin = lws_malloc(sizeof(*pin), __func__);
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if (!pin)
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goto bail;
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pin->list = *pplugin;
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*pplugin = pin;
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pin->u.lib = lib;
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pin->hdr = hdr;
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if (each)
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each(pin, each_user);
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return hdr;
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bail:
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uv_dlclose(&lib);
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return NULL;
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}
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int
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lws_plat_destroy_dl(struct lws_plugin *p)
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{
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return uv_dlclose(&p->u.lib);
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}
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static int
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protocol_plugin_cb(struct lws_plugin *pin, void *each_user)
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{
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struct lws_context *context = (struct lws_context *)each_user;
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const lws_plugin_protocol_t *plpr =
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(const lws_plugin_protocol_t *)pin->hdr;
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context->plugin_protocol_count += plpr->count_protocols;
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context->plugin_extension_count += plpr->count_extensions;
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return 0;
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}
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int
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lws_plat_plugins_init(struct lws_context *context, const char * const *d)
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{
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#if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
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if (info->plugin_dirs) {
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uv_loop_init(&context->uv.loop);
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lws_plugins_init(&context->plugin_list, info->plugin_dirs,
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"lws_protocol_plugin", NULL,
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protocol_plugin_cb, context);
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}
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#endif
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return 0;
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}
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int
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lws_plat_plugins_destroy(struct lws_context * context)
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{
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#if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
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if (lws_check_opt(context->options, LWS_SERVER_OPTION_LIBUV) &&
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context->plugin_list) {
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lws_plugins_destroy(&context->plugin_list, NULL, NULL);
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while (uv_loop_close(&context->uv.loop))
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;
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}
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#endif
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return 0;
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}
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