1 /*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #ifndef _WINSOCK_DEPRECATED_NO_WARNINGS
26 #define _WINSOCK_DEPRECATED_NO_WARNINGS
27 #endif
28 #include "private-lib-core.h"
29
30 /*
31 * ie, if the plugins api needed at all
32 */
33
34 #if defined(LWS_WITH_PLUGINS_API) && (UV_VERSION_MAJOR > 0)
35
36 const lws_plugin_header_t *
lws_plat_dlopen(struct lws_plugin **pplugin, const char *libpath, const char *sofilename, const char *_class, each_plugin_cb_t each, void *each_user)37 lws_plat_dlopen(struct lws_plugin **pplugin, const char *libpath,
38 const char *sofilename, const char *_class,
39 each_plugin_cb_t each, void *each_user)
40 {
41 const lws_plugin_header_t *hdr;
42 struct lws_plugin *pin;
43 char sym[96], *dot;
44 uv_lib_t lib;
45 void *v;
46 int m;
47
48 lib.errmsg = NULL;
49 lib.handle = NULL;
50
51 if (uv_dlopen(libpath, &lib)) {
52 uv_dlerror(&lib);
53 lwsl_err("Error loading DSO: %s\n", lib.errmsg);
54 uv_dlclose(&lib);
55 return NULL;
56 }
57
58 /* we could open it... can we get his export struct? */
59 m = lws_snprintf(sym, sizeof(sym) - 1, "%s", sofilename);
60 if (m < 4)
61 goto bail;
62 dot = strchr(sym, '.');
63 if (dot)
64 *dot = '\0'; /* snip the .so or .lib or what-have-you*/
65
66 if (uv_dlsym(&lib, sym, &v)) {
67 uv_dlerror(&lib);
68 lwsl_err("%s: Failed to get '%s' on %s: %s\n",
69 __func__, path, libpath, lib.errmsg);
70 goto bail;
71 }
72
73 hdr = (const lws_plugin_header_t *)v;
74 if (hdr->api_magic != LWS_PLUGIN_API_MAGIC) {
75 lwsl_info("%s: plugin %s has outdated api %d (vs %d)\n",
76 __func__, libpath, hdr->api_magic,
77 LWS_PLUGIN_API_MAGIC);
78 goto bail;
79 }
80
81 if (strcmp(hdr->lws_build_hash, LWS_BUILD_HASH))
82 goto bail;
83
84 if (strcmp(hdr->_class, _class))
85 goto bail;
86
87 /*
88 * We don't already have one of these, right?
89 */
90
91 pin = *pplugin;
92 while (pin) {
93 if (!strcmp(pin->hdr->name, hdr->name))
94 goto bail;
95 pin = pin->list;
96 }
97
98 /*
99 * OK let's bring it in
100 */
101
102 pin = lws_malloc(sizeof(*pin), __func__);
103 if (!pin)
104 goto bail;
105
106 pin->list = *pplugin;
107 *pplugin = pin;
108
109 pin->u.lib = lib;
110 pin->hdr = hdr;
111
112 if (each)
113 each(pin, each_user);
114
115 return hdr;
116
117 bail:
118 uv_dlclose(&lib);
119
120 return NULL;
121 }
122
123 int
lws_plat_destroy_dl(struct lws_plugin *p)124 lws_plat_destroy_dl(struct lws_plugin *p)
125 {
126 uv_dlclose(&p->u.lib);
127
128 return 0;
129 }
130
131 #endif
132
133 /*
134 * Specifically for protocol plugins support
135 */
136
137 #if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
138
139 static int
protocol_plugin_cb(struct lws_plugin *pin, void *each_user)140 protocol_plugin_cb(struct lws_plugin *pin, void *each_user)
141 {
142 struct lws_context *context = (struct lws_context *)each_user;
143 const lws_plugin_protocol_t *plpr =
144 (const lws_plugin_protocol_t *)pin->hdr;
145
146 context->plugin_protocol_count += plpr->count_protocols;
147 context->plugin_extension_count += plpr->count_extensions;
148
149 return 0;
150 }
151 #endif
152
153 int
lws_plat_plugins_init(struct lws_context *context, const char * const *d)154 lws_plat_plugins_init(struct lws_context *context, const char * const *d)
155 {
156 #if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
157 if (info->plugin_dirs) {
158 uv_loop_init(&context->uv.loop);
159 lws_plugins_init(&context->plugin_list, info->plugin_dirs,
160 "lws_protocol_plugin", NULL,
161 protocol_plugin_cb, context);
162 }
163 #endif
164
165 return 0;
166 }
167
168 int
lws_plat_plugins_destroy(struct lws_context * context)169 lws_plat_plugins_destroy(struct lws_context * context)
170 {
171 #if defined(LWS_WITH_PLUGINS) && (UV_VERSION_MAJOR > 0)
172 if (lws_check_opt(context->options, LWS_SERVER_OPTION_LIBUV) &&
173 context->plugin_list) {
174 lws_plugins_destroy(&context->plugin_list, NULL, NULL);
175 while (uv_loop_close(&context->uv.loop))
176 ;
177 }
178 #endif
179
180 return 0;
181 }
182