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/*
* 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
#include <string.h>
#include <errno.h>
#include <json-c/json.h>
#include <afb/afb-binding-v1.h>
#include <afb/afb-binding-v2.h>
#include "afb-ditf.h"
#include "afb-evt.h"
#include "afb-common.h"
#include "afb-hook.h"
#include "jobs.h"
#include "verbose.h"
/**********************************************
* normal flow
**********************************************/
static void vverbose_cb(void *closure, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
{
char *p;
struct afb_ditf *ditf = closure;
if (vasprintf(&p, fmt, args) < 0)
vverbose(level, file, line, function, fmt, args);
else {
verbose(level, file, line, function, "%s {binding %s}", p, ditf->prefix);
free(p);
}
}
static void old_vverbose_cb(void *closure, int level, const char *file, int line, const char *fmt, va_list args)
{
vverbose_cb(closure, level, file, line, "?", fmt, args);
}
static struct afb_event event_make_cb(void *closure, const char *name)
{
size_t plen, nlen;
char *event;
struct afb_ditf *ditf = closure;
/* makes the event name */
plen = strlen(ditf->prefix);
nlen = strlen(name);
event = alloca(nlen + plen + 2);
memcpy(event, ditf->prefix, plen);
event[plen] = '/';
memcpy(event + plen + 1, name, nlen + 1);
/* create the event */
return afb_evt_create_event(event);
}
static int event_broadcast_cb(void *closure, const char *name, struct json_object *object)
{
size_t plen, nlen;
char *event;
struct afb_ditf *ditf = closure;
/* makes the event name */
plen = strlen(ditf->prefix);
nlen = strlen(name);
event = alloca(nlen + plen + 2);
memcpy(event, ditf->prefix, plen);
event[plen] = '/';
memcpy(event + plen + 1, name, nlen + 1);
/* broadcast the event */
return afb_evt_broadcast(event, object);
}
static int rootdir_open_locale_cb(void *closure, const char *filename, int flags, const char *locale)
{
return afb_common_rootdir_open_locale(filename, flags, locale);
}
static int queue_job_cb(void *closure, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout)
{
return jobs_queue(group, timeout, callback, argument);
}
/**********************************************
* hooked flow
**********************************************/
static void hooked_vverbose_cb(void *closure, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
{
struct afb_ditf *ditf = closure;
vverbose_cb(closure, level, file, line, function, fmt, args);
afb_hook_ditf_vverbose(ditf, level, file, line, function, fmt, args);
}
static void hooked_old_vverbose_cb(void *closure, int level, const char *file, int line, const char *fmt, va_list args)
{
hooked_vverbose_cb(closure, level, file, line, "?", fmt, args);
}
static struct afb_event hooked_event_make_cb(void *closure, const char *name)
{
struct afb_ditf *ditf = closure;
struct afb_event r = event_make_cb(closure, name);
return afb_hook_ditf_event_make(ditf, name, r);
}
static int hooked_event_broadcast_cb(void *closure, const char *name, struct json_object *object)
{
int r;
struct afb_ditf *ditf = closure;
json_object_get(object);
afb_hook_ditf_event_broadcast_before(ditf, name, json_object_get(object));
r = event_broadcast_cb(closure, name, object);
afb_hook_ditf_event_broadcast_after(ditf, name, object, r);
json_object_put(object);
return r;
}
static struct sd_event *hooked_get_event_loop(void *closure)
{
struct afb_ditf *ditf = closure;
struct sd_event *r = afb_common_get_event_loop();
return afb_hook_ditf_get_event_loop(ditf, r);
}
static struct sd_bus *hooked_get_user_bus(void *closure)
{
struct afb_ditf *ditf = closure;
struct sd_bus *r = afb_common_get_user_bus();
return afb_hook_ditf_get_user_bus(ditf, r);
}
static struct sd_bus *hooked_get_system_bus(void *closure)
{
struct afb_ditf *ditf = closure;
struct sd_bus *r = afb_common_get_system_bus();
return afb_hook_ditf_get_system_bus(ditf, r);
}
static int hooked_rootdir_get_fd(void *closure)
{
struct afb_ditf *ditf = closure;
int r = afb_common_rootdir_get_fd();
return afb_hook_ditf_rootdir_get_fd(ditf, r);
}
static int hooked_rootdir_open_locale_cb(void *closure, const char *filename, int flags, const char *locale)
{
struct afb_ditf *ditf = closure;
int r = rootdir_open_locale_cb(closure, filename, flags, locale);
return afb_hook_ditf_rootdir_open_locale(ditf, filename, flags, locale, r);
}
static int hooked_queue_job_cb(void *closure, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout)
{
struct afb_ditf *ditf = closure;
int r = queue_job_cb(closure, callback, argument, group, timeout);
return afb_hook_ditf_queue_job(ditf, callback, argument, group, timeout, r);
}
static const struct afb_daemon_itf daemon_itf = {
.vverbose_v1 = old_vverbose_cb,
.vverbose_v2 = vverbose_cb,
.event_make = event_make_cb,
.event_broadcast = 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,
.rootdir_get_fd = afb_common_rootdir_get_fd,
.rootdir_open_locale = rootdir_open_locale_cb,
.queue_job = queue_job_cb
};
static const struct afb_daemon_itf hooked_daemon_itf = {
.vverbose_v1 = hooked_old_vverbose_cb,
.vverbose_v2 = hooked_vverbose_cb,
.event_make = hooked_event_make_cb,
.event_broadcast = hooked_event_broadcast_cb,
.get_event_loop = hooked_get_event_loop,
.get_user_bus = hooked_get_user_bus,
.get_system_bus = hooked_get_system_bus,
.rootdir_get_fd = hooked_rootdir_get_fd,
.rootdir_open_locale = hooked_rootdir_open_locale_cb,
.queue_job = hooked_queue_job_cb
};
void afb_ditf_init_v2(struct afb_ditf *ditf, const char *prefix, struct afb_binding_data_v2 *data)
{
ditf->version = 2;
ditf->v2 = data;
data->daemon.closure = ditf;
afb_ditf_rename(ditf, prefix);
}
void afb_ditf_init_v1(struct afb_ditf *ditf, const char *prefix, struct afb_binding_interface_v1 *itf)
{
ditf->version = 1;
ditf->v1 = itf;
itf->verbosity = verbosity;
itf->mode = AFB_MODE_LOCAL;
itf->daemon.closure = ditf;
afb_ditf_rename(ditf, prefix);
}
void afb_ditf_rename(struct afb_ditf *ditf, const char *prefix)
{
ditf->prefix = prefix;
afb_ditf_update_hook(ditf);
}
void afb_ditf_update_hook(struct afb_ditf *ditf)
{
int hooked = !!afb_hook_flags_ditf(ditf->prefix);
switch (ditf->version) {
case 1:
ditf->v1->daemon.itf = hooked ? &hooked_daemon_itf : &daemon_itf;
break;
default:
case 2:
ditf->v2->daemon.itf = hooked ? &hooked_daemon_itf : &daemon_itf;
break;
}
}
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