--- /dev/null
+/*
+ * Copyright (C) 2016, 2017 "IoT.bzh"
+ * Author José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+#define NO_BINDING_VERBOSE_MACRO
+
+#include <string.h>
+#include <dlfcn.h>
+#include <assert.h>
+
+#include <afb/afb-binding.h>
+
+#include "afb-apis.h"
+#include "afb-svc.h"
+#include "afb-evt.h"
+#include "afb-common.h"
+#include "afb-context.h"
+#include "afb-api-so.h"
+#include "afb-thread.h"
+#include "verbose.h"
+
+/*
+ * names of symbols
+ */
+static const char afb_api_so_v2_descriptor[] = "afbBindingV2";
+
+/*
+ * Description of a binding
+ */
+struct api_so_v2 {
+ struct afb_binding_v2 *binding; /* descriptor */
+ size_t apilength; /* length of the API name */
+ void *handle; /* context of dlopen */
+ struct afb_svc *service; /* handler for service started */
+ struct afb_binding_interface interface; /* interface for the binding */
+};
+
+static struct afb_event afb_api_so_event_make_cb(void *closure, const char *name);
+static int afb_api_so_event_broadcast_cb(void *closure, const char *name, struct json_object *object);
+static void afb_api_so_vverbose_cb(void *closure, int level, const char *file, int line, const char *fmt, va_list args);
+static int afb_api_so_rootdir_get_fd(void *closure);
+static int afb_api_so_rootdir_open_locale(void *closure, const char *filename, int flags, const char *locale);
+
+static const struct afb_daemon_itf daemon_itf = {
+ .event_broadcast = afb_api_so_event_broadcast_cb,
+ .get_event_loop = afb_common_get_event_loop,
+ .get_user_bus = afb_common_get_user_bus,
+ .get_system_bus = afb_common_get_system_bus,
+ .vverbose = afb_api_so_vverbose_cb,
+ .event_make = afb_api_so_event_make_cb,
+ .rootdir_get_fd = afb_api_so_rootdir_get_fd,
+ .rootdir_open_locale = afb_api_so_rootdir_open_locale
+};
+
+static struct afb_event afb_api_so_event_make_cb(void *closure, const char *name)
+{
+ size_t length;
+ char *event;
+ struct api_so_v2 *desc = closure;
+
+ /* makes the event name */
+ assert(desc->binding != NULL);
+ length = strlen(name);
+ event = alloca(length + 2 + desc->apilength);
+ memcpy(event, desc->binding->api, desc->apilength);
+ event[desc->apilength] = '/';
+ memcpy(event + desc->apilength + 1, name, length + 1);
+
+ /* crate the event */
+ return afb_evt_create_event(event);
+}
+
+static int afb_api_so_event_broadcast_cb(void *closure, const char *name, struct json_object *object)
+{
+ size_t length;
+ char *event;
+ struct api_so_v2 *desc = closure;
+
+ /* makes the event name */
+ assert(desc->binding != NULL);
+ length = strlen(name);
+ event = alloca(length + 2 + desc->apilength);
+ memcpy(event, desc->binding->api, desc->apilength);
+ event[desc->apilength] = '/';
+ memcpy(event + desc->apilength + 1, name, length + 1);
+
+ return afb_evt_broadcast(event, object);
+}
+
+static void afb_api_so_vverbose_cb(void *closure, int level, const char *file, int line, const char *fmt, va_list args)
+{
+ char *p;
+ struct api_so_v2 *desc = closure;
+
+ if (vasprintf(&p, fmt, args) < 0)
+ vverbose(level, file, line, fmt, args);
+ else {
+ verbose(level, file, line, "%s {binding %s}", p, desc->binding->api);
+ free(p);
+ }
+}
+
+static int afb_api_so_rootdir_get_fd(void *closure)
+{
+ return afb_common_rootdir_get_fd();
+}
+
+static int afb_api_so_rootdir_open_locale(void *closure, const char *filename, int flags, const char *locale)
+{
+ return afb_common_rootdir_open_locale(filename, flags, locale);
+}
+
+static int call_check(struct afb_req req, struct afb_context *context, const struct afb_verb_v2 *verb)
+{
+ int stag = (int)verb->session;
+
+ if ((stag & (AFB_SESSION_CREATE|AFB_SESSION_CLOSE|AFB_SESSION_RENEW|AFB_SESSION_CHECK|AFB_SESSION_LOA_EQ)) != 0) {
+ if (!afb_context_check(context)) {
+ afb_context_close(context);
+ afb_req_fail(req, "failed", "invalid token's identity");
+ return 0;
+ }
+ }
+
+ if ((stag & AFB_SESSION_CREATE) != 0) {
+ if (afb_context_check_loa(context, 1)) {
+ afb_req_fail(req, "failed", "invalid creation state");
+ return 0;
+ }
+ afb_context_change_loa(context, 1);
+ afb_context_refresh(context);
+ }
+
+ if ((stag & (AFB_SESSION_CREATE | AFB_SESSION_RENEW)) != 0)
+ afb_context_refresh(context);
+
+ if ((stag & AFB_SESSION_CLOSE) != 0) {
+ afb_context_change_loa(context, 0);
+ afb_context_close(context);
+ }
+
+ if ((stag & AFB_SESSION_LOA_GE) != 0) {
+ int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
+ if (!afb_context_check_loa(context, loa)) {
+ afb_req_fail(req, "failed", "invalid LOA");
+ return 0;
+ }
+ }
+
+ if ((stag & AFB_SESSION_LOA_LE) != 0) {
+ int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
+ if (afb_context_check_loa(context, loa + 1)) {
+ afb_req_fail(req, "failed", "invalid LOA");
+ return 0;
+ }
+ }
+ return 1;
+}
+
+static void call_cb(void *closure, struct afb_req req, struct afb_context *context, const char *strverb)
+{
+ const struct afb_verb_v2 *verb;
+ struct api_so_v2 *desc = closure;
+
+ verb = desc->binding->verbs;
+ while (verb->verb && strcasecmp(verb->verb, strverb))
+ verb++;
+ if (!verb->verb)
+ afb_req_fail_f(req, "unknown-verb", "verb %s unknown within api %s", strverb, desc->binding->api);
+ else if (call_check(req, context, verb)) {
+ afb_thread_req_call(req, verb->callback, afb_api_so_timeout, desc);
+ }
+}
+
+static int service_start_cb(void *closure, int share_session, int onneed)
+{
+ int (*start)(const struct afb_binding_interface *interface, struct afb_service service);
+ void (*onevent)(const char *event, struct json_object *object);
+
+ struct api_so_v2 *desc = closure;
+
+ /* check state */
+ if (desc->service != NULL) {
+ /* not an error when onneed */
+ if (onneed != 0)
+ return 0;
+
+ /* already started: it is an error */
+ ERROR("Service %s already started", desc->binding->api);
+ return -1;
+ }
+
+ /* get the initialisation */
+ start = desc->binding->start;
+ if (start == NULL) {
+ /* not an error when onneed */
+ if (onneed != 0)
+ return 0;
+
+ /* no initialisation method */
+ ERROR("Binding %s is not a service", desc->binding->api);
+ return -1;
+ }
+
+ /* get the event handler if any */
+ onevent = desc->binding->onevent;
+ desc->service = afb_svc_create_v2(share_session, onevent, start, &desc->interface);
+ if (desc->service == NULL) {
+ /* starting error */
+ ERROR("Starting service %s failed", desc->binding->api);
+ return -1;
+ }
+
+ return 0;
+}
+
+int afb_api_so_v2_add(const char *path, void *handle)
+{
+ int rc;
+ struct api_so_v2 *desc;
+ struct afb_binding_v2 *binding;
+
+ /* retrieves the register function */
+ binding = dlsym(handle, afb_api_so_v2_descriptor);
+ if (!binding)
+ return 0;
+
+ INFO("binding [%s] looks like an AFB binding V2", path);
+
+ /* basic checks */
+ if (binding->api == NULL || *binding->api == 0) {
+ ERROR("binding [%s] bad api name...", path);
+ goto error;
+ }
+ if (!afb_apis_is_valid_api_name(binding->api)) {
+ ERROR("binding [%s] invalid api name...", path);
+ goto error;
+ }
+ if (binding->specification == NULL || *binding->specification == 0) {
+ ERROR("binding [%s] bad specification...", path);
+ goto error;
+ }
+ if (binding->verbs == NULL) {
+ ERROR("binding [%s] no verbs...", path);
+ goto error;
+ }
+
+ /* allocates the description */
+ desc = calloc(1, sizeof *desc);
+ if (desc == NULL) {
+ ERROR("out of memory");
+ goto error;
+ }
+ desc->binding = binding;
+ desc->handle = handle;
+
+ /* init the interface */
+ desc->interface.verbosity = verbosity;
+ desc->interface.mode = AFB_MODE_LOCAL;
+ desc->interface.daemon.itf = &daemon_itf;
+ desc->interface.daemon.closure = desc;
+
+ /* for log purpose, a fake binding is needed here */
+
+ /* init the binding */
+ if (binding->init) {
+ NOTICE("binding %s [%s] calling init function", binding->api, path);
+ rc = binding->init(&desc->interface);
+ if (rc < 0) {
+ ERROR("binding %s [%s] initialisation function failed...", binding->api, path);
+ goto error2;
+ }
+ }
+
+ /* records the binding */
+ desc->apilength = strlen(binding->api);
+ if (afb_apis_add(binding->api, (struct afb_api){
+ .closure = desc,
+ .call = call_cb,
+ .service_start = service_start_cb }) < 0) {
+ ERROR("binding [%s] can't be registered...", path);
+ goto error2;
+ }
+ NOTICE("binding %s loaded with API prefix %s", path, binding->api);
+ return 1;
+
+error2:
+ free(desc);
+error:
+ return -1;
+}
+
Code Review / src / app-framework-binder.git / commitdiff