nuttx/net/local/local_bind.c

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/****************************************************************************
* net/local/local_bind.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/socket.h>
#include <string.h>
#include <assert.h>
#include <nuttx/net/net.h>
#include "local/local.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: psock_local_bind
*
* Description:
* This function implements the low-level parts of the standard local
* bind()operation.
*
****************************************************************************/
int psock_local_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen)
{
FAR struct local_conn_s *conn = psock->s_conn;
FAR const struct sockaddr_un *unaddr =
(FAR const struct sockaddr_un *)addr;
int index;
DEBUGASSERT(unaddr->sun_family == AF_LOCAL);
if (addrlen <= sizeof(sa_family_t) + 1)
{
return -EINVAL;
}
conn = psock->s_conn;
/* Check if local address is already in use */
if (local_findconn(conn, unaddr) != NULL)
{
return -EADDRINUSE;
}
/* Save the address family */
conn->lc_instance_id = -1;
/* Now determine the type of the Unix domain socket by comparing the size
* of the address description.
*/
if (unaddr->sun_path[0] == '\0')
{
/* Zero-length sun_path... This is an abstract Unix domain socket */
conn->lc_type = LOCAL_TYPE_ABSTRACT;
index = 1;
}
else
{
/* This is an normal, pathname Unix domain socket */
conn->lc_type = LOCAL_TYPE_PATHNAME;
index = 0;
}
strlcpy(conn->lc_path, &unaddr->sun_path[index], sizeof(conn->lc_path));
conn->lc_state = LOCAL_STATE_BOUND;
return OK;
}