plugin.c

   1 /*
   2  * uhttpd - Tiny single-threaded httpd - Main header
   3  *
   4  *   Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
   5  *   Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   6  *
   7  *  Licensed under the Apache License, Version 2.0 (the "License");
   8  *  you may not use this file except in compliance with the License.
   9  *  You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  *  Unless required by applicable law or agreed to in writing, software
  14  *  distributed under the License is distributed on an "AS IS" BASIS,
  15  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  *  See the License for the specific language governing permissions and
  17  *  limitations under the License.
  18  */
  19
  20 #include <dlfcn.h>
  21 #include "uhttpd.h"
  22 #include "plugin.h"
  23
  24 static LIST_HEAD(plugins);
  25
  26 static const struct uhttpd_ops ops = {
  27         .dispatch_add = uh_dispatch_add,
  28         .path_match = uh_path_match,
  29         .create_process = uh_create_process,
  30         .get_process_vars = uh_get_process_vars,
  31         .http_header = uh_http_header,
  32         .client_error = uh_client_error,
  33         .request_done = uh_request_done,
  34         .chunk_write = uh_chunk_write,
  35         .urlencode = uh_urlencode,
  36         .urldecode = uh_urldecode,
  37 };
  38
  39 int uh_plugin_init(const char *name)
  40 {
  41         struct uhttpd_plugin *p;
  42         const char *sym;
  43         void *dlh;
  44
  45         dlh = dlopen(name, RTLD_LAZY | RTLD_LOCAL);
  46         if (!dlh) {
  47                 fprintf(stderr, "Could not open plugin %s: %s\n", name, dlerror());
  48                 return -ENOENT;
  49         }
  50
  51         sym = "uhttpd_plugin";
  52         p = dlsym(dlh, sym);
  53         if (!p) {
  54                 fprintf(stderr, "Could not find symbol '%s' in plugin '%s'\n", sym, name);
  55                 return -ENOENT;
  56         }
  57
  58         list_add(&p->list, &plugins);
  59         return p->init(&ops, &conf);
  60 }
  61
  62 void uh_plugin_post_init(void)
  63 {
  64         struct uhttpd_plugin *p;
  65
  66         list_for_each_entry(p, &plugins, list)
  67                 p->post_init();
  68 }