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/*
* Copyright (C) 2011 The Android Open Source Project
*
* 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.
*/
/* NOTICE: This is a clean room re-implementation of libnl */
#include <malloc.h>
#include "netlink-types.h"
#include "netlink/handlers.h"
/* Allocate a new callback handle. */
struct nl_cb *nl_cb_alloc(enum nl_cb_kind kind)
{
struct nl_cb *cb;
cb = (struct nl_cb *) malloc(sizeof(struct nl_cb));
if (cb == NULL)
goto fail;
memset(cb, 0, sizeof(*cb));
return nl_cb_get(cb);
fail:
return NULL;
}
/* Clone an existing callback handle */
struct nl_cb *nl_cb_clone(struct nl_cb *orig)
{
struct nl_cb *new_cb;
new_cb = nl_cb_alloc(NL_CB_DEFAULT);
if (new_cb == NULL)
goto fail;
/* Copy original and set refcount to 1 */
memcpy(new_cb, orig, sizeof(*orig));
new_cb->cb_refcnt = 1;
return new_cb;
fail:
return NULL;
}
/* Set up a callback. */
int nl_cb_set(struct nl_cb *cb, enum nl_cb_type type, enum nl_cb_kind kind, \
nl_recvmsg_msg_cb_t func, void *arg)
{
cb->cb_set[type] = func;
cb->cb_args[type] = arg;
return 0;
}
/* Set up an error callback. */
int nl_cb_err(struct nl_cb *cb, enum nl_cb_kind kind, \
nl_recvmsg_err_cb_t func, void *arg)
{
cb->cb_err = func;
cb->cb_err_arg = arg;
return 0;
}
struct nl_cb *nl_cb_get(struct nl_cb *cb)
{
cb->cb_refcnt++;
return cb;
}
void nl_cb_put(struct nl_cb *cb)
{
if (!cb)
return;
cb->cb_refcnt--;
if (cb->cb_refcnt <= 0)
free(cb);
}
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