2 * Copyright (C) 2016, 2017 "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_BINDING_VERBOSE_MACRO
25 #include <afb/afb-binding.h>
30 #include "afb-common.h"
31 #include "afb-context.h"
32 #include "afb-api-so.h"
33 #include "afb-thread.h"
39 static const char afb_api_so_v1_register[] = "afbBindingV1Register";
40 static const char afb_api_so_v1_service_init[] = "afbBindingV1ServiceInit";
41 static const char afb_api_so_v1_service_event[] = "afbBindingV1ServiceEvent";
44 * Description of a binding
47 struct afb_binding *binding; /* descriptor */
48 size_t apilength; /* length of the API name */
49 void *handle; /* context of dlopen */
50 struct afb_svc *service; /* handler for service started */
51 struct afb_binding_interface interface; /* interface for the binding */
54 static struct afb_event afb_api_so_event_make_cb(void *closure, const char *name);
55 static int afb_api_so_event_broadcast_cb(void *closure, const char *name, struct json_object *object);
56 static void afb_api_so_vverbose_cb(void *closure, int level, const char *file, int line, const char *fmt, va_list args);
57 static int afb_api_so_rootdir_get_fd(void *closure);
58 static int afb_api_so_rootdir_open_locale(void *closure, const char *filename, int flags, const char *locale);
60 static const struct afb_daemon_itf daemon_itf = {
61 .event_broadcast = afb_api_so_event_broadcast_cb,
62 .get_event_loop = afb_common_get_event_loop,
63 .get_user_bus = afb_common_get_user_bus,
64 .get_system_bus = afb_common_get_system_bus,
65 .vverbose = afb_api_so_vverbose_cb,
66 .event_make = afb_api_so_event_make_cb,
67 .rootdir_get_fd = afb_api_so_rootdir_get_fd,
68 .rootdir_open_locale = afb_api_so_rootdir_open_locale
71 static struct afb_event afb_api_so_event_make_cb(void *closure, const char *name)
75 struct api_so_v1 *desc = closure;
77 /* makes the event name */
78 assert(desc->binding != NULL);
79 length = strlen(name);
80 event = alloca(length + 2 + desc->apilength);
81 memcpy(event, desc->binding->v1.prefix, desc->apilength);
82 event[desc->apilength] = '/';
83 memcpy(event + desc->apilength + 1, name, length + 1);
86 return afb_evt_create_event(event);
89 static int afb_api_so_event_broadcast_cb(void *closure, const char *name, struct json_object *object)
93 struct api_so_v1 *desc = closure;
95 /* makes the event name */
96 assert(desc->binding != NULL);
97 length = strlen(name);
98 event = alloca(length + 2 + desc->apilength);
99 memcpy(event, desc->binding->v1.prefix, desc->apilength);
100 event[desc->apilength] = '/';
101 memcpy(event + desc->apilength + 1, name, length + 1);
103 return afb_evt_broadcast(event, object);
106 static void afb_api_so_vverbose_cb(void *closure, int level, const char *file, int line, const char *fmt, va_list args)
109 struct api_so_v1 *desc = closure;
111 if (vasprintf(&p, fmt, args) < 0)
112 vverbose(level, file, line, fmt, args);
114 verbose(level, file, line, "%s {binding %s}", p, desc->binding->v1.prefix);
119 static int afb_api_so_rootdir_get_fd(void *closure)
121 return afb_common_rootdir_get_fd();
124 static int afb_api_so_rootdir_open_locale(void *closure, const char *filename, int flags, const char *locale)
126 return afb_common_rootdir_open_locale(filename, flags, locale);
129 static int call_check(struct afb_req req, struct afb_context *context, const struct afb_verb_desc_v1 *verb)
131 int stag = (int)verb->session;
133 if ((stag & (AFB_SESSION_CREATE|AFB_SESSION_CLOSE|AFB_SESSION_RENEW|AFB_SESSION_CHECK|AFB_SESSION_LOA_EQ)) != 0) {
134 if (!afb_context_check(context)) {
135 afb_context_close(context);
136 afb_req_fail(req, "failed", "invalid token's identity");
141 if ((stag & AFB_SESSION_CREATE) != 0) {
142 if (afb_context_check_loa(context, 1)) {
143 afb_req_fail(req, "failed", "invalid creation state");
146 afb_context_change_loa(context, 1);
147 afb_context_refresh(context);
150 if ((stag & (AFB_SESSION_CREATE | AFB_SESSION_RENEW)) != 0)
151 afb_context_refresh(context);
153 if ((stag & AFB_SESSION_CLOSE) != 0) {
154 afb_context_change_loa(context, 0);
155 afb_context_close(context);
158 if ((stag & AFB_SESSION_LOA_GE) != 0) {
159 int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
160 if (!afb_context_check_loa(context, loa)) {
161 afb_req_fail(req, "failed", "invalid LOA");
166 if ((stag & AFB_SESSION_LOA_LE) != 0) {
167 int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
168 if (afb_context_check_loa(context, loa + 1)) {
169 afb_req_fail(req, "failed", "invalid LOA");
176 static void call_cb(void *closure, struct afb_req req, struct afb_context *context, const char *strverb)
178 const struct afb_verb_desc_v1 *verb;
179 struct api_so_v1 *desc = closure;
181 verb = desc->binding->v1.verbs;
182 while (verb->name && strcasecmp(verb->name, strverb))
185 afb_req_fail_f(req, "unknown-verb", "verb %s unknown within api %s", strverb, desc->binding->v1.prefix);
186 else if (call_check(req, context, verb)) {
187 afb_thread_req_call(req, verb->callback, afb_api_so_timeout, desc);
191 static int service_start_cb(void *closure, int share_session, int onneed)
193 int (*init)(struct afb_service service);
194 void (*onevent)(const char *event, struct json_object *object);
196 struct api_so_v1 *desc = closure;
199 if (desc->service != NULL) {
200 /* not an error when onneed */
204 /* already started: it is an error */
205 ERROR("Service %s already started", desc->binding->v1.prefix);
209 /* get the initialisation */
210 init = dlsym(desc->handle, afb_api_so_v1_service_init);
212 /* not an error when onneed */
216 /* no initialisation method */
217 ERROR("Binding %s is not a service", desc->binding->v1.prefix);
221 /* get the event handler if any */
222 onevent = dlsym(desc->handle, afb_api_so_v1_service_event);
223 desc->service = afb_svc_create(share_session, init, onevent);
224 if (desc->service == NULL) {
226 ERROR("Starting service %s failed", desc->binding->v1.prefix);
233 int afb_api_so_v1_add(const char *path, void *handle)
235 struct api_so_v1 *desc;
236 struct afb_binding *(*register_function) (const struct afb_binding_interface *interface);
237 struct afb_verb_desc_v1 fake_verb;
238 struct afb_binding fake_binding;
240 /* retrieves the register function */
241 register_function = dlsym(handle, afb_api_so_v1_register);
242 if (!register_function)
244 INFO("binding [%s] is a valid AFB binding V1", path);
246 /* allocates the description */
247 desc = calloc(1, sizeof *desc);
249 ERROR("out of memory");
252 desc->handle = handle;
254 /* init the interface */
255 desc->interface.verbosity = verbosity;
256 desc->interface.mode = AFB_MODE_LOCAL;
257 desc->interface.daemon.itf = &daemon_itf;
258 desc->interface.daemon.closure = desc;
260 /* for log purpose, a fake binding is needed here */
261 desc->binding = &fake_binding;
262 fake_binding.type = AFB_BINDING_VERSION_1;
263 fake_binding.v1.info = path;
264 fake_binding.v1.prefix = path;
265 fake_binding.v1.verbs = &fake_verb;
266 fake_verb.name = NULL;
268 /* init the binding */
269 NOTICE("binding [%s] calling registering function %s", path, afb_api_so_v1_register);
270 desc->binding = register_function(&desc->interface);
271 if (desc->binding == NULL) {
272 ERROR("binding [%s] register function failed. continuing...", path);
276 /* check the returned structure */
277 if (desc->binding->type != AFB_BINDING_VERSION_1) {
278 ERROR("binding [%s] invalid type %d...", path, desc->binding->type);
281 if (desc->binding->v1.prefix == NULL || *desc->binding->v1.prefix == 0) {
282 ERROR("binding [%s] bad prefix...", path);
285 if (!afb_apis_is_valid_api_name(desc->binding->v1.prefix)) {
286 ERROR("binding [%s] invalid prefix...", path);
289 if (desc->binding->v1.info == NULL || *desc->binding->v1.info == 0) {
290 ERROR("binding [%s] bad description...", path);
293 if (desc->binding->v1.verbs == NULL) {
294 ERROR("binding [%s] no APIs...", path);
298 /* records the binding */
299 desc->apilength = strlen(desc->binding->v1.prefix);
300 if (afb_apis_add(desc->binding->v1.prefix, (struct afb_api){
303 .service_start = service_start_cb }) < 0) {
304 ERROR("binding [%s] can't be registered...", path);
307 NOTICE("binding %s loaded with API prefix %s", path, desc->binding->v1.prefix);