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/*
* Copyright (C) 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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include <json-c/json.h>
#include <afb/afb-binding.h>
#include "afb-context.h"
#include "afb-xreq.h"
#include "afb-evt.h"
#include "afb-msg-json.h"
#include "afb-subcall.h"
#include "verbose.h"
static struct json_object *xreq_json_cb(void *closure);
static struct afb_arg xreq_get_cb(void *closure, const char *name);
static void xreq_success_cb(void *closure, struct json_object *obj, const char *info);
static void xreq_fail_cb(void *closure, const char *status, const char *info);
static const char *xreq_raw_cb(void *closure, size_t *size);
static void xreq_send_cb(void *closure, const char *buffer, size_t size);
static void *xreq_context_get_cb(void *closure);
static void xreq_context_set_cb(void *closure, void *value, void (*free_value)(void*));
static void xreq_addref_cb(void *closure);
static void xreq_unref_cb(void *closure);
static void xreq_session_close_cb(void *closure);
static int xreq_session_set_LOA_cb(void *closure, unsigned level);
static int xreq_subscribe_cb(void *closure, struct afb_event event);
static int xreq_unsubscribe_cb(void *closure, struct afb_event event);
static void xreq_subcall_cb(
void *closure,
const char *api,
const char *verb,
struct json_object *args,
void (*callback)(void*, int, struct json_object*),
void *cb_closure);
static int xreq_subcallsync_cb(
void *closure,
const char *api,
const char *verb,
struct json_object *args,
struct json_object **result);
const struct afb_req_itf xreq_itf = {
.json = xreq_json_cb,
.get = xreq_get_cb,
.success = xreq_success_cb,
.fail = xreq_fail_cb,
.raw = xreq_raw_cb,
.send = xreq_send_cb,
.context_get = xreq_context_get_cb,
.context_set = xreq_context_set_cb,
.addref = xreq_addref_cb,
.unref = xreq_unref_cb,
.session_close = xreq_session_close_cb,
.session_set_LOA = xreq_session_set_LOA_cb,
.subscribe = xreq_subscribe_cb,
.unsubscribe = xreq_unsubscribe_cb,
.subcall = xreq_subcall_cb,
.subcallsync = xreq_subcallsync_cb
};
static struct json_object *xreq_json_cb(void *closure)
{
struct afb_xreq *xreq = closure;
return xreq->json ? : (xreq->json = xreq->queryitf->json(xreq->query));
}
static struct afb_arg xreq_get_cb(void *closure, const char *name)
{
struct afb_xreq *xreq = closure;
if (xreq->queryitf->get)
return xreq->queryitf->get(xreq->query, name);
else
return afb_msg_json_get_arg(xreq_json_cb(closure), name);
}
static void xreq_success_cb(void *closure, struct json_object *obj, const char *info)
{
struct afb_xreq *xreq = closure;
afb_xreq_success(xreq, obj, info);
}
void afb_xreq_success(struct afb_xreq *xreq, struct json_object *obj, const char *info)
{
if (xreq->replied) {
ERROR("reply called more than one time!!");
json_object_put(obj);
} else {
xreq->replied = 1;
if (xreq->queryitf->success)
xreq->queryitf->success(xreq->query, obj, info);
else
xreq->queryitf->reply(xreq->query, 0, afb_msg_json_reply_ok(info, obj, &xreq->context, NULL));
}
}
static void xreq_fail_cb(void *closure, const char *status, const char *info)
{
struct afb_xreq *xreq = closure;
afb_xreq_fail(xreq, status, info);
}
void afb_xreq_fail(struct afb_xreq *xreq, const char *status, const char *info)
{
if (xreq->replied) {
ERROR("reply called more than one time!!");
} else {
xreq->replied = 1;
if (xreq->queryitf->fail)
xreq->queryitf->fail(xreq->query, status, info);
else
xreq->queryitf->reply(xreq->query, 1, afb_msg_json_reply_error(status, info, &xreq->context, NULL));
}
}
static const char *xreq_raw_cb(void *closure, size_t *size)
{
struct afb_xreq *xreq = closure;
return afb_xreq_raw(xreq, size);
}
const char *afb_xreq_raw(struct afb_xreq *xreq, size_t *size)
{
const char *result = json_object_to_json_string(xreq_json_cb(xreq));
if (size != NULL)
*size = strlen(result);
return result;
}
static void xreq_send_cb(void *closure, const char *buffer, size_t size)
{
struct json_object *obj = json_tokener_parse(buffer);
if (!obj == !buffer)
xreq_success_cb(closure, obj, "fake send");
else
xreq_fail_cb(closure, "fake-send-failed", "fake send");
}
static void *xreq_context_get_cb(void *closure)
{
struct afb_xreq *xreq = closure;
return afb_context_get(&xreq->context);
}
static void xreq_context_set_cb(void *closure, void *value, void (*free_value)(void*))
{
struct afb_xreq *xreq = closure;
afb_context_set(&xreq->context, value, free_value);
}
static void xreq_addref_cb(void *closure)
{
struct afb_xreq *xreq = closure;
afb_xreq_addref(xreq);
}
void afb_xreq_addref(struct afb_xreq *xreq)
{
xreq->refcount++;
}
static void xreq_unref_cb(void *closure)
{
struct afb_xreq *xreq = closure;
afb_xreq_unref(xreq);
}
void afb_xreq_unref(struct afb_xreq *xreq)
{
if (!--xreq->refcount) {
xreq->queryitf->unref(xreq->query);
}
}
static void xreq_session_close_cb(void *closure)
{
struct afb_xreq *xreq = closure;
afb_context_close(&xreq->context);
}
static int xreq_session_set_LOA_cb(void *closure, unsigned level)
{
struct afb_xreq *xreq = closure;
return afb_context_change_loa(&xreq->context, level);
}
static int xreq_subscribe_cb(void *closure, struct afb_event event)
{
struct afb_xreq *xreq = closure;
return afb_xreq_subscribe(xreq, event);
}
int afb_xreq_subscribe(struct afb_xreq *xreq, struct afb_event event)
{
if (xreq->listener)
return afb_evt_add_watch(xreq->listener, event);
if (xreq->queryitf->subscribe)
return xreq->queryitf->subscribe(xreq->query, event);
ERROR("no event listener, subscription impossible");
errno = EINVAL;
return -1;
}
static int xreq_unsubscribe_cb(void *closure, struct afb_event event)
{
struct afb_xreq *xreq = closure;
return afb_xreq_unsubscribe(xreq, event);
}
int afb_xreq_unsubscribe(struct afb_xreq *xreq, struct afb_event event)
{
if (xreq->listener)
return afb_evt_remove_watch(xreq->listener, event);
if (xreq->queryitf->unsubscribe)
return xreq->queryitf->unsubscribe(xreq->query, event);
ERROR("no event listener, unsubscription impossible");
errno = EINVAL;
return -1;
}
static void xreq_subcall_cb(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *cb_closure)
{
struct afb_xreq *xreq = closure;
if (xreq->queryitf->subcall)
xreq->queryitf->subcall(xreq->query, api, verb, args, callback, cb_closure);
else
afb_subcall(xreq, api, verb, args, callback, cb_closure);
}
static int xreq_subcallsync_cb(void *closure, const char *api, const char *verb, struct json_object *args, struct json_object **result)
{
struct afb_xreq *xreq = closure;
/*
if (xreq->queryitf->subcallsync)
xreq->queryitf->subcall(xreq->query, api, verb, args, callback, cb_closure);
else
*/
return afb_subcall_sync(xreq, api, verb, args, result);
}
void afb_xreq_success_f(struct afb_xreq *xreq, struct json_object *obj, const char *info, ...)
{
char *message;
va_list args;
va_start(args, info);
if (info == NULL || vasprintf(&message, info, args) < 0)
message = NULL;
va_end(args);
afb_xreq_success(xreq, obj, message);
free(message);
}
void afb_xreq_fail_f(struct afb_xreq *xreq, const char *status, const char *info, ...)
{
char *message;
va_list args;
va_start(args, info);
if (info == NULL || vasprintf(&message, info, args) < 0)
message = NULL;
va_end(args);
afb_xreq_fail(xreq, status, message);
free(message);
}
static int xcheck(struct afb_xreq *xreq)
{
int stag = xreq->sessionflags;
if ((stag & (AFB_SESSION_CREATE|AFB_SESSION_CLOSE|AFB_SESSION_RENEW|AFB_SESSION_CHECK|AFB_SESSION_LOA_EQ)) != 0) {
if (!afb_context_check(&xreq->context)) {
afb_context_close(&xreq->context);
afb_xreq_fail_f(xreq, "failed", "invalid token's identity");
return 0;
}
}
if ((stag & AFB_SESSION_CREATE) != 0) {
if (afb_context_check_loa(&xreq->context, 1)) {
afb_xreq_fail_f(xreq, "failed", "invalid creation state");
return 0;
}
afb_context_change_loa(&xreq->context, 1);
afb_context_refresh(&xreq->context);
}
if ((stag & (AFB_SESSION_CREATE | AFB_SESSION_RENEW)) != 0)
afb_context_refresh(&xreq->context);
if ((stag & AFB_SESSION_CLOSE) != 0) {
afb_context_change_loa(&xreq->context, 0);
afb_context_close(&xreq->context);
}
if ((stag & AFB_SESSION_LOA_GE) != 0) {
int loa = (stag >> AFB_SESSION_LOA_SHIFT) & AFB_SESSION_LOA_MASK;
if (!afb_context_check_loa(&xreq->context, loa)) {
afb_xreq_fail_f(xreq, "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(&xreq->context, loa + 1)) {
afb_xreq_fail_f(xreq, "failed", "invalid LOA");
return 0;
}
}
return 1;
}
void afb_xreq_call(struct afb_xreq *xreq)
{
if (xcheck(xreq))
xreq->callback((struct afb_req){ .itf = &xreq_itf, .closure = xreq });
}
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