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.
25 #include <afb/afb-binding-v2.h>
26 #include <json-c/json.h>
29 #include "afb-api-so-v2.h"
30 #include "afb-apiset.h"
31 #include "afb-export.h"
33 #include "afb-common.h"
34 #include "afb-context.h"
35 #include "afb-api-so.h"
43 static const char afb_api_so_v2_descriptor[] = "afbBindingV2";
44 static const char afb_api_so_v2_data[] = "afbBindingV2data";
47 * Description of a binding
50 const struct afb_binding_v2 *binding; /* descriptor */
51 void *handle; /* context of dlopen */
52 struct afb_export *export; /* exportations */
55 static const struct afb_verb_v2 *search(struct api_so_v2 *desc, const char *name)
57 const struct afb_verb_v2 *verb;
59 verb = desc->binding->verbs;
60 while (verb->verb && strcasecmp(verb->verb, name))
62 return verb->verb ? verb : NULL;
66 static void call_cb(void *closure, struct afb_xreq *xreq)
68 struct api_so_v2 *desc = closure;
69 const struct afb_verb_v2 *verb;
71 verb = search(desc, xreq->verb);
72 afb_xreq_call_verb_v2(xreq, verb);
75 static int service_start_cb(void *closure, int share_session, int onneed, struct afb_apiset *apiset)
79 void (*onevent)(const char *event, struct json_object *object);
81 struct api_so_v2 *desc = closure;
84 if (afb_export_is_started(desc->export)) {
85 /* not an error when onneed */
89 /* already started: it is an error */
90 ERROR("Service %s already started", afb_export_apiname(desc->export));
94 /* get the initialisation */
95 start = desc->binding->init;
96 onevent = desc->binding->onevent;
98 /* unshare the session if asked */
100 rc = afb_export_unshare_session(desc->export);
102 ERROR("Can't unshare the session for %s", afb_export_apiname(desc->export));
107 /* set event handling */
108 rc = afb_export_handle_events(desc->export, onevent);
110 ERROR("Can't set event handler for %s", afb_export_apiname(desc->export));
114 /* Starts the service */
115 rc = afb_export_start_v2(desc->export, start);
117 /* initialisation error */
118 ERROR("Initialisation of service %s failed (%d): %m", afb_export_apiname(desc->export), rc);
126 static void update_hooks_cb(void *closure)
128 struct api_so_v2 *desc = closure;
129 afb_export_update_hook(desc->export);
132 static int get_verbosity_cb(void *closure)
134 struct api_so_v2 *desc = closure;
135 return afb_export_verbosity_get(desc->export);
138 static void set_verbosity_cb(void *closure, int level)
140 struct api_so_v2 *desc = closure;
141 afb_export_verbosity_set(desc->export, level);
144 static struct json_object *addperm(struct json_object *o, struct json_object *x)
146 struct json_object *a;
151 if (!json_object_object_get_ex(o, "allOf", &a)) {
152 a = json_object_new_array();
153 json_object_array_add(a, o);
154 o = json_object_new_object();
155 json_object_object_add(o, "allOf", a);
157 json_object_array_add(a, x);
161 static struct json_object *addperm_key_val(struct json_object *o, const char *key, struct json_object *val)
163 struct json_object *x = json_object_new_object();
164 json_object_object_add(x, key, val);
165 return addperm(o, x);
168 static struct json_object *addperm_key_valstr(struct json_object *o, const char *key, const char *val)
170 return addperm_key_val(o, key, json_object_new_string(val));
173 static struct json_object *addperm_key_valint(struct json_object *o, const char *key, int val)
175 return addperm_key_val(o, key, json_object_new_int(val));
178 static struct json_object *addauth_or_array(struct json_object *o, const struct afb_auth *auth);
180 static struct json_object *addauth(struct json_object *o, const struct afb_auth *auth)
183 case afb_auth_No: return addperm(o, json_object_new_boolean(0));
184 case afb_auth_Token: return addperm_key_valstr(o, "session", "check");
185 case afb_auth_LOA: return addperm_key_valint(o, "LOA", auth->loa);
186 case afb_auth_Permission: return addperm_key_valstr(o, "permission", auth->text);
187 case afb_auth_Or: return addperm_key_val(o, "anyOf", addauth_or_array(json_object_new_array(), auth));
188 case afb_auth_And: return addauth(addauth(o, auth->first), auth->next);
189 case afb_auth_Not: return addperm_key_val(o, "not", addauth(NULL, auth->first));
190 case afb_auth_Yes: return addperm(o, json_object_new_boolean(1));
195 static struct json_object *addauth_or_array(struct json_object *o, const struct afb_auth *auth)
197 if (auth->type != afb_auth_Or)
198 json_object_array_add(o, addauth(NULL, auth));
200 addauth_or_array(o, auth->first);
201 addauth_or_array(o, auth->next);
207 static struct json_object *make_description_openAPIv3(struct api_so_v2 *desc)
210 const struct afb_verb_v2 *verb;
211 struct json_object *r, *f, *a, *i, *p, *g;
213 r = json_object_new_object();
214 json_object_object_add(r, "openapi", json_object_new_string("3.0.0"));
216 i = json_object_new_object();
217 json_object_object_add(r, "info", i);
218 json_object_object_add(i, "title", json_object_new_string(afb_export_apiname(desc->export)));
219 json_object_object_add(i, "version", json_object_new_string("0.0.0"));
220 json_object_object_add(i, "description", json_object_new_string(desc->binding->info ?: afb_export_apiname(desc->export)));
222 p = json_object_new_object();
223 json_object_object_add(r, "paths", p);
224 verb = desc->binding->verbs;
227 strncpy(buffer + 1, verb->verb, sizeof buffer - 1);
228 buffer[sizeof buffer - 1] = 0;
229 f = json_object_new_object();
230 json_object_object_add(p, buffer, f);
231 g = json_object_new_object();
232 json_object_object_add(f, "get", g);
235 if (verb->session & AFB_SESSION_CLOSE_V2)
236 a = addperm_key_valstr(a, "session", "close");
237 if (verb->session & AFB_SESSION_CHECK_V2)
238 a = addperm_key_valstr(a, "session", "check");
239 if (verb->session & AFB_SESSION_REFRESH_V2)
240 a = addperm_key_valstr(a, "token", "refresh");
241 if (verb->session & AFB_SESSION_LOA_MASK_V2)
242 a = addperm_key_valint(a, "LOA", verb->session & AFB_SESSION_LOA_MASK_V2);
244 a = addauth(a, verb->auth);
246 json_object_object_add(g, "x-permissions", a);
248 a = json_object_new_object();
249 json_object_object_add(g, "responses", a);
250 f = json_object_new_object();
251 json_object_object_add(a, "200", f);
252 json_object_object_add(f, "description", json_object_new_string(verb->info?:verb->verb));
258 static struct json_object *describe_cb(void *closure)
260 struct api_so_v2 *desc = closure;
261 struct json_object *r = desc->binding->specification ? json_tokener_parse(desc->binding->specification) : NULL;
263 r = make_description_openAPIv3(desc);
267 static struct afb_api_itf so_v2_api_itf = {
269 .service_start = service_start_cb,
270 .update_hooks = update_hooks_cb,
271 .get_verbosity = get_verbosity_cb,
272 .set_verbosity = set_verbosity_cb,
273 .describe = describe_cb
276 int afb_api_so_v2_add_binding(const struct afb_binding_v2 *binding, void *handle, struct afb_apiset *apiset, struct afb_binding_data_v2 *data)
279 struct api_so_v2 *desc;
280 struct afb_api afb_api;
281 struct afb_export *export;
285 assert(binding->api);
286 assert(binding->verbs);
289 /* allocates the description */
290 export = afb_export_create_v2(binding->api, data);
291 desc = calloc(1, sizeof *desc);
293 ERROR("out of memory");
296 desc->binding = binding;
297 desc->handle = handle;
298 desc->export = export;
300 /* init the binding */
301 if (binding->preinit) {
302 INFO("binding %s calling preinit function", binding->api);
303 rc = binding->preinit();
305 ERROR("binding %s preinit function failed...", afb_export_apiname(desc->export));
310 /* records the binding */
311 afb_api.closure = desc;
312 afb_api.itf = &so_v2_api_itf;
313 afb_api.noconcurrency = binding->noconcurrency;
314 if (afb_apiset_add(apiset, afb_export_apiname(desc->export), afb_api) < 0) {
315 ERROR("binding %s can't be registered to set %s...", afb_export_apiname(desc->export), afb_apiset_name(apiset));
318 INFO("binding %s added to set %s", afb_export_apiname(desc->export), afb_apiset_name(apiset));
322 afb_export_destroy(export);
328 int afb_api_so_v2_add(const char *path, void *handle, struct afb_apiset *apiset)
330 const struct afb_binding_v2 *binding;
331 struct afb_binding_data_v2 *data;
333 /* retrieves the register function */
334 binding = dlsym(handle, afb_api_so_v2_descriptor);
335 data = dlsym(handle, afb_api_so_v2_data);
336 if (!binding && !data)
339 INFO("binding [%s] looks like an AFB binding V2", path);
342 if (!binding || !data) {
343 ERROR("binding [%s] incomplete symbol set: %s is missing",
344 path, binding ? afb_api_so_v2_data : afb_api_so_v2_descriptor);
347 if (binding->api == NULL || *binding->api == 0) {
348 ERROR("binding [%s] bad api name...", path);
351 if (!afb_api_is_valid_name(binding->api)) {
352 ERROR("binding [%s] invalid api name...", path);
356 if (binding->specification == NULL || *binding->specification == 0) {
357 ERROR("binding [%s] bad specification...", path);
361 if (binding->verbs == NULL) {
362 ERROR("binding [%s] no verbs...", path);
366 return afb_api_so_v2_add_binding(binding, handle, apiset, data);