plugin.c

   1 /*
   2  * uhttpd - Tiny single-threaded httpd
   3  *
   4  *   Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
   5  *   Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  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         .chunk_printf = uh_chunk_printf,
  36         .urlencode = uh_urlencode,
  37         .urldecode = uh_urldecode,
  38 };
  39
  40 int uh_plugin_init(const char *name)
  41 {
  42         struct uhttpd_plugin *p;
  43         const char *sym;
  44         void *dlh;
  45
  46         dlh = dlopen(name, RTLD_LAZY | RTLD_GLOBAL);
  47         if (!dlh) {
  48                 fprintf(stderr, "Could not open plugin %s: %s\n", name, dlerror());
  49                 return -ENOENT;
  50         }
  51
  52         sym = "uhttpd_plugin";
  53         p = dlsym(dlh, sym);
  54         if (!p) {
  55                 fprintf(stderr, "Could not find symbol '%s' in plugin '%s'\n", sym, name);
  56                 return -ENOENT;
  57         }
  58
  59         list_add(&p->list, &plugins);
  60         return p->init(&ops, &conf);
  61 }
  62
  63 void uh_plugin_post_init(void)
  64 {
  65         struct uhttpd_plugin *p;
  66
  67         list_for_each_entry(p, &plugins, list)
  68                 if (p->post_init)
  69                         p->post_init();
  70 }