87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/****************************************************************************
|
|
* libs/libc/net/lib_nameindex.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 <net/if.h>
|
|
#include <errno.h>
|
|
|
|
#include "libc.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: if_nameindex
|
|
*
|
|
* Description:
|
|
* The if_nameindex() function returns an array of if_nameindex structures,
|
|
* each containing information about one of the network interfaces on the
|
|
* local system. The if_nameindex structure contains at least the following
|
|
* entries:
|
|
* unsigned int if_index;
|
|
* FAR char *if_name;
|
|
* The if_index field contains the interface index. The if_name field
|
|
* points to the null-terminated interface name. The end of the array
|
|
* is indicated by entry with if_index set to zero and if_name set to NULL.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* On success, if_nameindex() returns pointer to the array; on error, NULL
|
|
* is returned, and errno is set to indicate the error.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct if_nameindex *if_nameindex(void)
|
|
{
|
|
FAR struct if_nameindex *ifn;
|
|
FAR char *buf;
|
|
int i = 0;
|
|
int j;
|
|
|
|
ifn = lib_malloc((sizeof(*ifn) + IF_NAMESIZE) * MAX_IFINDEX);
|
|
if (ifn == NULL)
|
|
{
|
|
set_errno(ENOBUFS);
|
|
return NULL;
|
|
}
|
|
|
|
buf = (FAR char *)(ifn + MAX_IFINDEX);
|
|
for (j = 1; j <= MAX_IFINDEX; j++)
|
|
{
|
|
ifn[i].if_name = if_indextoname(j, buf);
|
|
if (ifn[i].if_name)
|
|
{
|
|
ifn[i++].if_index = j;
|
|
buf += IF_NAMESIZE;
|
|
}
|
|
}
|
|
|
|
ifn[i].if_name = NULL;
|
|
ifn[i].if_index = 0;
|
|
|
|
return ifn;
|
|
}
|