mirror of
https://libwebsockets.org/repo/libwebsockets
synced 2024-11-22 00:57:52 +00:00
7c9f1ca0a6
For plugins that handle PROTOCOL_INIT, we have to iterate any PLUGINS_BUILTIN plugins as if we had just discovered and loaded them from plugin files, so they bind to vhosts appropriately. Add some private helpers to keep the guts from duplication in plat.
125 lines
3.0 KiB
C
125 lines
3.0 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 - 2020 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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#if !defined(_GNU_SOURCE)
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#define _GNU_SOURCE
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#endif
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#include "private-lib-core.h"
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#include <pwd.h>
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#include <grp.h>
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#include <dlfcn.h>
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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];
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void *l;
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int m;
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if (strlen(sofilename) < 6)
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/* [lib]...[.so] */
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return NULL;
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lwsl_info(" trying %s\n", libpath);
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l = dlopen(libpath, RTLD_NOW);
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if (!l) {
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lwsl_info("%s: Error loading DSO: %s\n", __func__, dlerror());
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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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if (!strcmp(&sym[m - 3], ".so"))
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sym[m - 3] = '\0'; /* snip the .so */
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hdr = (const lws_plugin_header_t *)dlsym(l, sym);
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if (!hdr) {
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lwsl_info("%s: Failed to get export '%s' from %s: %s\n",
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__func__, sym, libpath, dlerror());
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goto bail;
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}
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if (hdr->api_magic != LWS_PLUGIN_API_MAGIC) {
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lwsl_info("%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->lws_build_hash, LWS_BUILD_HASH))
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goto bail;
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if (strcmp(hdr->_class, _class))
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goto bail;
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/*
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* We don't already have one of these, right?
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*/
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pin = *pplugin;
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while (pin) {
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if (!strcmp(pin->hdr->name, hdr->name))
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goto bail;
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pin = pin->list;
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}
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/*
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* OK let's bring it in
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*/
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pin = lws_plugin_alloc(pplugin);
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if (!pin)
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goto bail;
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pin->u.l = l;
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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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lwsl_notice(" %s\n", libpath);
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return hdr;
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bail:
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dlclose(l);
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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 dlclose(p->u.l);
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}
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