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libc/net: add inet_network function

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Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
This commit is contained in:
zhanghongyu 2023-01-05 20:46:42 +08:00 committed by Xiang Xiao
parent b978ff245e
commit e019b0d0b8
2 changed files with 71 additions and 1 deletions
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2
libs/libc/net/Make.defs
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@ -22,7 +22,7 @@
CSRCS += lib_addrconfig.c lib_base64.c lib_htons.c lib_htonl.c
CSRCS += lib_inetaddr.c lib_inetaton.c lib_inetntoa.c
CSRCS += lib_inetntop.c lib_inetpton.c
CSRCS += lib_inetntop.c lib_inetpton.c lib_inetnetwork.c
CSRCS += lib_etherntoa.c lib_etheraton.c
ifeq ($(CONFIG_NET),y)

70
libs/libc/net/lib_inetnetwork.c Normal file
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@ -0,0 +1,70 @@
/****************************************************************************
* libs/libc/net/lib_inetnetwork.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 <stdio.h>
#include <arpa/inet.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* name inet_network
*
* Description:
* The inet_network() function converts the string pointed to by cp, in the
* standard IPv4 dotted decimal notation, to an integer value suitable for
* use as an Internet address.
*
* inet_aton() returns nonzero if the address is valid, zero if not.
* The address supplied in cp can have one of the following forms:
*
* a.b.c.d Each of the four numeric parts specifies a byte of the address;
* the bytes are assigned in left-to-right order to produce the
* binary address.
*
* a.b.c Parts a and b specify the first two bytes of the binary address.
* Part c is interpreted as a 16-bit value that defines the
* rightmost two bytes of the binary address. This notation is
* suitable for specifying (outmoded) Class B network addresses.
*
* a.b Part a specifies the first byte of the binary address. Part b is
* interpreted as a 24-bit value that defines the rightmost three
* bytes of the binary address. This notation is suitable for
* specifying (outmoded) Class A network addresses.
*
* a The value a is interpreted as a 32-bit value that is stored
* directly into the binary address without any byte rearrangement.
*
* Returned Value:
* If input string cannot be recognized as a valid IPv4 number, function
* returns zero.
*
****************************************************************************/
in_addr_t inet_network(FAR const char *cp)
{
in_addr_t t = inet_addr(cp);
return NTOHL(t);
}