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/*
* Copyright (C) 2011-2012 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "libubus.h"
#include "libubus-internal.h"
static int ubus_subscriber_cb(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req,
const char *method, struct blob_attr *msg)
{
struct ubus_subscriber *s;
s = container_of(obj, struct ubus_subscriber, obj);
s->cb(ctx, obj, req, method, msg);
return 0;
}
static const struct ubus_method watch_method = {
.name = NULL,
.handler = ubus_subscriber_cb,
};
int ubus_register_subscriber(struct ubus_context *ctx, struct ubus_subscriber *s)
{
struct ubus_object *obj = &s->obj;
obj->methods = &watch_method;
obj->n_methods = 1;
return ubus_add_object(ctx, obj);
}
static int
__ubus_subscribe_request(struct ubus_context *ctx, struct ubus_object *obj, uint32_t id, int type)
{
struct ubus_request req;
blob_buf_init(&b, 0);
blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
blob_put_int32(&b, UBUS_ATTR_TARGET, id);
if (ubus_start_request(ctx, &req, b.head, type, 0) < 0)
return UBUS_STATUS_INVALID_ARGUMENT;
return ubus_complete_request(ctx, &req, 0);
}
int ubus_subscribe(struct ubus_context *ctx, struct ubus_subscriber *obj, uint32_t id)
{
return __ubus_subscribe_request(ctx, &obj->obj, id, UBUS_MSG_SUBSCRIBE);
}
int ubus_unsubscribe(struct ubus_context *ctx, struct ubus_subscriber *obj, uint32_t id)
{
return __ubus_subscribe_request(ctx, &obj->obj, id, UBUS_MSG_UNSUBSCRIBE);
}
void __hidden ubus_process_unsubscribe(struct ubus_context *ctx, struct ubus_msghdr *hdr)
{
struct ubus_subscriber *s;
struct blob_attr **attrbuf;
struct ubus_object *obj;
uint32_t objid;
attrbuf = ubus_parse_msg(hdr->data);
if (!attrbuf[UBUS_ATTR_OBJID] || !attrbuf[UBUS_ATTR_TARGET])
return;
objid = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
obj = avl_find_element(&ctx->objects, &objid, obj, avl);
if (!obj)
return;
if (obj->methods != &watch_method)
return;
s = container_of(obj, struct ubus_subscriber, obj);
s->remove_cb(ctx, s, blob_get_u32(attrbuf[UBUS_ATTR_TARGET]));
}
void __hidden ubus_process_notify(struct ubus_context *ctx, struct ubus_msghdr *hdr)
{
struct blob_attr **attrbuf;
struct ubus_object *obj;
uint32_t objid;
attrbuf = ubus_parse_msg(hdr->data);
if (!attrbuf[UBUS_ATTR_OBJID] || !attrbuf[UBUS_ATTR_ACTIVE])
return;
objid = blob_get_u32(attrbuf[UBUS_ATTR_OBJID]);
obj = avl_find_element(&ctx->objects, &objid, obj, avl);
if (!obj)
return;
obj->has_subscribers = blob_get_u8(attrbuf[UBUS_ATTR_ACTIVE]);
if (obj->subscribe_cb)
obj->subscribe_cb(ctx, obj);
}
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