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 AFB_BINDING_PRAGMA_NO_VERBOSE_MACRO
26 #include <afb/afb-binding-v2.h>
27 #include <json-c/json.h>
30 #include "afb-api-so-v2.h"
31 #include "afb-apiset.h"
35 #include "afb-common.h"
36 #include "afb-context.h"
37 #include "afb-api-so.h"
45 static const char afb_api_so_v2_descriptor[] = "afbBindingV2";
46 static const char afb_api_so_v2_data[] = "afbBindingV2data";
49 * Description of a binding
52 const struct afb_binding_v2 *binding; /* descriptor */
53 struct afb_binding_data_v2 *data; /* data */
54 void *handle; /* context of dlopen */
55 struct afb_svc *service; /* handler for service started */
56 struct afb_ditf ditf; /* daemon interface */
59 static const struct afb_verb_v2 *search(struct api_so_v2 *desc, const char *name)
61 const struct afb_verb_v2 *verb;
63 verb = desc->binding->verbs;
64 while (verb->verb && strcasecmp(verb->verb, name))
66 return verb->verb ? verb : NULL;
70 static void call_cb(void *closure, struct afb_xreq *xreq)
72 struct api_so_v2 *desc = closure;
73 const struct afb_verb_v2 *verb;
75 verb = search(desc, xreq->verb);
76 afb_xreq_call_verb_v2(xreq, verb);
81 struct api_so_v2 *desc;
82 struct afb_xreq *xreq;
85 static void call_sync_cb_cb(int signum, void *closure)
87 struct call_sync *cs = closure;
89 call_cb(cs->desc, cs->xreq);
91 if (!cs->xreq->replied)
92 afb_xreq_fail(cs->xreq, "aborted", "internal error");
96 static void call_sync_cb(void *closure, struct afb_xreq *xreq)
98 struct call_sync cs = { .desc = closure, .xreq = xreq };
100 if (jobs_call(closure, 0, call_sync_cb_cb, &cs))
101 call_cb(closure, xreq);
104 static int service_start_cb(void *closure, int share_session, int onneed, struct afb_apiset *apiset)
107 void (*onevent)(const char *event, struct json_object *object);
109 struct api_so_v2 *desc = closure;
112 if (desc->service != NULL) {
113 /* not an error when onneed */
117 /* already started: it is an error */
118 ERROR("Service %s already started", desc->binding->api);
122 /* get the initialisation */
123 start = desc->binding->init;
124 onevent = desc->binding->onevent;
125 if (start == NULL && onevent == NULL) {
126 /* not an error when onneed */
130 /* no initialisation method */
131 ERROR("Binding %s is not a service", desc->binding->api);
135 /* get the event handler if any */
136 desc->service = afb_svc_create_v2(apiset, share_session, start, onevent, desc->data);
137 if (desc->service == NULL) {
139 ERROR("Starting service %s failed", desc->binding->api);
146 static void update_hooks_cb(void *closure)
148 struct api_so_v2 *desc = closure;
149 afb_ditf_update_hook(&desc->ditf);
152 static int get_verbosity_cb(void *closure)
154 struct api_so_v2 *desc = closure;
155 return desc->data->verbosity;
158 static void set_verbosity_cb(void *closure, int level)
160 struct api_so_v2 *desc = closure;
161 desc->data->verbosity = level;
164 static struct json_object *addperm(struct json_object *o, struct json_object *x)
166 struct json_object *a;
171 if (!json_object_object_get_ex(o, "allOf", &a)) {
172 a = json_object_new_array();
173 json_object_array_add(a, o);
174 o = json_object_new_object();
175 json_object_object_add(o, "allOf", a);
177 json_object_array_add(a, x);
181 static struct json_object *addperm_key_val(struct json_object *o, const char *key, struct json_object *val)
183 struct json_object *x = json_object_new_object();
184 json_object_object_add(x, key, val);
185 return addperm(o, x);
188 static struct json_object *addperm_key_valstr(struct json_object *o, const char *key, const char *val)
190 return addperm_key_val(o, key, json_object_new_string(val));
193 static struct json_object *addperm_key_valint(struct json_object *o, const char *key, int val)
195 return addperm_key_val(o, key, json_object_new_int(val));
198 static struct json_object *make_description(struct api_so_v2 *desc)
201 const struct afb_verb_v2 *verb;
202 struct json_object *r, *f, *a, *i, *p, *g;
204 r = json_object_new_object();
205 json_object_object_add(r, "openapi", json_object_new_string("3.0.0"));
207 i = json_object_new_object();
208 json_object_object_add(r, "info", i);
209 json_object_object_add(i, "title", json_object_new_string(desc->binding->api));
210 json_object_object_add(i, "version", json_object_new_string("0.0.0"));
212 p = json_object_new_object();
213 json_object_object_add(r, "paths", p);
214 verb = desc->binding->verbs;
217 strncpy(buffer + 1, verb->verb, sizeof buffer - 1);
218 buffer[sizeof buffer - 1] = 0;
219 f = json_object_new_object();
220 json_object_object_add(p, buffer, f);
221 g = json_object_new_object();
222 json_object_object_add(f, "get", g);
225 if (verb->session & AFB_SESSION_CLOSE_V2)
226 a = addperm_key_valstr(a, "session", "close");
227 if (verb->session & AFB_SESSION_CHECK_V2)
228 a = addperm_key_valstr(a, "session", "check");
229 if (verb->session & AFB_SESSION_REFRESH_V2)
230 a = addperm_key_valstr(a, "token", "refresh");
231 if (verb->session & AFB_SESSION_LOA_MASK_V2)
232 a = addperm_key_valint(a, "LOA", verb->session & AFB_SESSION_LOA_MASK_V2);
238 json_object_object_add(g, "x-permissions", a);
240 a = json_object_new_object();
241 json_object_object_add(g, "responses", a);
242 f = json_object_new_object();
243 json_object_object_add(a, "200", f);
244 json_object_object_add(f, "description", json_object_new_string(verb->verb));
250 static struct json_object *describe_cb(void *closure)
252 struct api_so_v2 *desc = closure;
253 struct json_object *r = desc->binding->specification ? json_tokener_parse(desc->binding->specification) : NULL;
255 r = make_description(desc);
259 static struct afb_api_itf so_v2_api_itf = {
261 .service_start = service_start_cb,
262 .update_hooks = update_hooks_cb,
263 .get_verbosity = get_verbosity_cb,
264 .set_verbosity = set_verbosity_cb,
265 .describe = describe_cb
268 static struct afb_api_itf so_v2_sync_api_itf = {
269 .call = call_sync_cb,
270 .service_start = service_start_cb,
271 .update_hooks = update_hooks_cb,
272 .get_verbosity = get_verbosity_cb,
273 .set_verbosity = set_verbosity_cb,
274 .describe = describe_cb
277 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)
280 struct api_so_v2 *desc;
281 struct afb_api afb_api;
285 assert(binding->api);
286 assert(binding->verbs);
289 /* allocates the description */
290 desc = calloc(1, sizeof *desc);
292 ERROR("out of memory");
295 desc->binding = binding;
297 desc->handle = handle;
298 desc->service = NULL;
300 /* init the interface */
301 desc->data->verbosity = verbosity;
302 afb_ditf_init_v2(&desc->ditf, binding->api, data);
304 /* init the binding */
305 if (binding->preinit) {
306 INFO("binding %s calling preinit function", binding->api);
307 rc = binding->preinit();
309 ERROR("binding %s preinit function failed...", binding->api);
314 /* records the binding */
315 afb_api.closure = desc;
316 afb_api.itf = binding->noconcurrency ? &so_v2_sync_api_itf : &so_v2_api_itf;
317 if (afb_apiset_add(apiset, binding->api, afb_api) < 0) {
318 ERROR("binding %s can't be registered to set %s...", binding->api, afb_apiset_name(apiset));
321 INFO("binding %s added to set %s", binding->api, afb_apiset_name(apiset));
330 int afb_api_so_v2_add(const char *path, void *handle, struct afb_apiset *apiset)
332 const struct afb_binding_v2 *binding;
333 struct afb_binding_data_v2 *data;
335 /* retrieves the register function */
336 binding = dlsym(handle, afb_api_so_v2_descriptor);
337 data = dlsym(handle, afb_api_so_v2_data);
338 if (!binding && !data)
341 INFO("binding [%s] looks like an AFB binding V2", path);
344 if (!binding || !data) {
345 ERROR("binding [%s] incomplete symbol set: %s is missing",
346 path, binding ? afb_api_so_v2_data : afb_api_so_v2_descriptor);
349 if (binding->api == NULL || *binding->api == 0) {
350 ERROR("binding [%s] bad api name...", path);
353 if (!afb_api_is_valid_name(binding->api)) {
354 ERROR("binding [%s] invalid api name...", path);
358 if (binding->specification == NULL || *binding->specification == 0) {
359 ERROR("binding [%s] bad specification...", path);
363 if (binding->verbs == NULL) {
364 ERROR("binding [%s] no verbs...", path);
368 return afb_api_so_v2_add_binding(binding, handle, apiset, data);