2 * Copyright (C) 2016 "IoT.bzh"
3 * Author José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #define NO_PLUGIN_VERBOSE_MACRO
28 #include <sys/types.h>
31 #include <afb/afb-plugin.h>
32 #include <afb/afb-req-itf.h>
33 #include <afb/afb-event-itf.h>
36 #include "afb-common.h"
37 #include "afb-context.h"
39 #include "afb-api-so.h"
40 #include "afb-sig-handler.h"
46 * Description of a plugin
49 struct AFB_plugin *plugin; /* descriptor */
50 size_t apilength; /* length of the API name */
51 void *handle; /* context of dlopen */
52 struct afb_svc *service; /* handler for service started */
53 struct AFB_interface interface; /* interface for the plugin */
56 static int api_timeout = 15;
58 static const char plugin_register_function_v1[] = "pluginAfbV1Register";
59 static const char plugin_service_init_function_v1[] = "pluginAfbV1ServiceInit";
60 static const char plugin_service_event_function_v1[] = "pluginAfbV1ServiceEvent";
62 void afb_api_so_set_timeout(int to)
67 static struct afb_event afb_api_so_event_make(struct api_so_desc *desc, const char *name)
72 /* makes the event name */
73 assert(desc->plugin != NULL);
74 length = strlen(name);
75 event = alloca(length + 2 + desc->apilength);
76 memcpy(event, desc->plugin->v1.prefix, desc->apilength);
77 event[desc->apilength] = '/';
78 memcpy(event + desc->apilength + 1, name, length + 1);
81 return afb_evt_create_event(event);
84 static int afb_api_so_event_broadcast(struct api_so_desc *desc, const char *name, struct json_object *object)
89 /* makes the event name */
90 assert(desc->plugin != NULL);
91 length = strlen(name);
92 event = alloca(length + 2 + desc->apilength);
93 memcpy(event, desc->plugin->v1.prefix, desc->apilength);
94 event[desc->apilength] = '/';
95 memcpy(event + desc->apilength + 1, name, length + 1);
97 return afb_evt_broadcast(event, object);
100 static void afb_api_so_vverbose(struct api_so_desc *desc, int level, const char *file, int line, const char *fmt, va_list args)
104 if (vasprintf(&p, fmt, args) < 0)
105 vverbose(level, file, line, fmt, args);
107 verbose(level, file, line, "%s {plugin %s}", p, desc->plugin->v1.prefix);
112 static const struct afb_daemon_itf daemon_itf = {
113 .event_broadcast = (void*)afb_api_so_event_broadcast,
114 .get_event_loop = (void*)afb_common_get_event_loop,
115 .get_user_bus = (void*)afb_common_get_user_bus,
116 .get_system_bus = (void*)afb_common_get_system_bus,
117 .vverbose = (void*)afb_api_so_vverbose,
118 .event_make = (void*)afb_api_so_event_make
123 void (*action)(struct afb_req);
126 static void monitored_call(int signum, struct monitoring *data)
129 afb_req_fail_f(data->req, "aborted", "signal %s(%d) caught", strsignal(signum), signum);
131 data->action(data->req);
134 static void call_check(struct afb_req req, struct afb_context *context, const struct AFB_verb_desc_v1 *verb)
136 struct monitoring data;
138 int stag = (int)verb->session;
140 if ((stag & (AFB_SESSION_CREATE|AFB_SESSION_CLOSE|AFB_SESSION_RENEW|AFB_SESSION_CHECK|AFB_SESSION_LOA_EQ)) != 0) {
141 if (!afb_context_check(context)) {
142 afb_context_close(context);
143 afb_req_fail(req, "failed", "invalid token's identity");
148 if ((stag & AFB_SESSION_CREATE) != 0) {
149 if (afb_context_check_loa(context, 1)) {
150 afb_req_fail(req, "failed", "invalid creation state");
153 afb_context_change_loa(context, 1);
154 afb_context_refresh(context);
157 if ((stag & (AFB_SESSION_CREATE | AFB_SESSION_RENEW)) != 0)
158 afb_context_refresh(context);
160 if ((stag & AFB_SESSION_CLOSE) != 0) {
161 afb_context_change_loa(context, 0);
162 afb_context_close(context);
165 if ((stag & AFB_SESSION_LOA_GE) != 0) {
166 int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
167 if (!afb_context_check_loa(context, loa)) {
168 afb_req_fail(req, "failed", "invalid LOA");
173 if ((stag & AFB_SESSION_LOA_LE) != 0) {
174 int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
175 if (afb_context_check_loa(context, loa + 1)) {
176 afb_req_fail(req, "failed", "invalid LOA");
182 data.action = verb->callback;
183 afb_sig_monitor((void*)monitored_call, &data, api_timeout);
186 static void call(struct api_so_desc *desc, struct afb_req req, struct afb_context *context, const char *verb, size_t lenverb)
188 const struct AFB_verb_desc_v1 *v;
190 v = desc->plugin->v1.verbs;
191 while (v->name && (strncasecmp(v->name, verb, lenverb) || v->name[lenverb]))
194 call_check(req, context, v);
196 afb_req_fail_f(req, "unknown-verb", "verb %.*s unknown within api %s", (int)lenverb, verb, desc->plugin->v1.prefix);
199 static int service_start(struct api_so_desc *desc, int share_session, int onneed)
201 int (*init)(struct afb_service service);
202 void (*onevent)(const char *event, struct json_object *object);
205 if (desc->service != NULL) {
206 /* not an error when onneed */
210 /* already started: it is an error */
211 ERROR("Service %s already started", desc->plugin->v1.prefix);
215 /* get the initialisation */
216 init = dlsym(desc->handle, plugin_service_init_function_v1);
218 /* not an error when onneed */
222 /* no initialisation method */
223 ERROR("Binding %s is not a service", desc->plugin->v1.prefix);
227 /* get the event handler if any */
228 onevent = dlsym(desc->handle, plugin_service_event_function_v1);
229 desc->service = afb_svc_create(share_session, init, onevent);
230 if (desc->service == NULL) {
232 ERROR("Starting service %s failed", desc->plugin->v1.prefix);
239 int afb_api_so_add_plugin(const char *path)
243 struct api_so_desc *desc;
244 struct AFB_plugin *(*pluginAfbV1RegisterFct) (const struct AFB_interface *interface);
246 // This is a loadable library let's check if it's a plugin
248 handle = dlopen(path, RTLD_NOW | RTLD_LOCAL);
249 if (handle == NULL) {
250 ERROR("plugin [%s] not loadable", path);
254 /* retrieves the register function */
255 pluginAfbV1RegisterFct = dlsym(handle, plugin_register_function_v1);
256 if (!pluginAfbV1RegisterFct) {
257 ERROR("plugin [%s] is not an AFB plugin", path);
260 INFO("plugin [%s] is a valid AFB plugin", path);
263 /* allocates the description */
264 desc = calloc(1, sizeof *desc);
266 ERROR("out of memory");
269 desc->handle = handle;
271 /* init the interface */
272 desc->interface.verbosity = verbosity;
273 desc->interface.mode = AFB_MODE_LOCAL;
274 desc->interface.daemon.itf = &daemon_itf;
275 desc->interface.daemon.closure = desc;
277 /* init the plugin */
278 NOTICE("plugin [%s] calling registering function %s", path, plugin_register_function_v1);
279 desc->plugin = pluginAfbV1RegisterFct(&desc->interface);
280 if (desc->plugin == NULL) {
281 ERROR("plugin [%s] register function failed. continuing...", path);
285 /* check the returned structure */
286 if (desc->plugin->type != AFB_PLUGIN_VERSION_1) {
287 ERROR("plugin [%s] invalid type %d...", path, desc->plugin->type);
290 if (desc->plugin->v1.prefix == NULL || *desc->plugin->v1.prefix == 0) {
291 ERROR("plugin [%s] bad prefix...", path);
294 if (!afb_apis_is_valid_api_name(desc->plugin->v1.prefix)) {
295 ERROR("plugin [%s] invalid prefix...", path);
298 if (desc->plugin->v1.info == NULL || *desc->plugin->v1.info == 0) {
299 ERROR("plugin [%s] bad description...", path);
302 if (desc->plugin->v1.verbs == NULL) {
303 ERROR("plugin [%s] no APIs...", path);
307 /* records the plugin */
308 desc->apilength = strlen(desc->plugin->v1.prefix);
309 if (afb_apis_add(desc->plugin->v1.prefix, (struct afb_api){
312 .service_start = (void*)service_start }) < 0) {
313 ERROR("plugin [%s] can't be registered...", path);
316 NOTICE("plugin %s loaded with API prefix %s", path, desc->plugin->v1.prefix);
327 static int adddirs(char path[PATH_MAX], size_t end)
330 struct dirent ent, *result;
333 /* open the DIR now */
336 ERROR("can't scan plugin directory %s, %m", path);
339 INFO("Scanning dir=[%s] for plugins", path);
341 /* scan each entry */
345 readdir_r(dir, &ent, &result);
349 len = strlen(ent.d_name);
350 if (len + end >= PATH_MAX) {
351 ERROR("path too long while scanning plugins for %s", ent.d_name);
354 memcpy(&path[end], ent.d_name, len+1);
355 if (ent.d_type == DT_DIR) {
356 /* case of directories */
357 if (ent.d_name[0] == '.') {
360 if (ent.d_name[1] == '.' && len == 2)
363 adddirs(path, end+len);;
364 } else if (ent.d_type == DT_REG) {
366 if (!strstr(ent.d_name, ".so"))
368 if (afb_api_so_add_plugin(path) < 0)
376 int afb_api_so_add_directory(const char *path)
379 char buffer[PATH_MAX];
381 length = strlen(path);
382 if (length >= sizeof(buffer)) {
383 ERROR("path too long %lu [%.99s...]", (unsigned long)length, path);
387 memcpy(buffer, path, length + 1);
388 return adddirs(buffer, length);
391 int afb_api_so_add_path(const char *path)
396 rc = stat(path, &st);
398 ERROR("Invalid plugin path [%s]: %m", path);
399 else if (S_ISDIR(st.st_mode))
400 rc = afb_api_so_add_directory(path);
401 else if (strstr(path, ".so"))
402 rc = afb_api_so_add_plugin(path);
404 INFO("not a plugin [%s], skipped", path);
408 int afb_api_so_add_pathset(const char *pathset)
410 static char sep[] = ":";
413 ps = strdupa(pathset);
415 p = strsep(&ps, sep);
418 if (afb_api_so_add_path(p) < 0)