71 lines
3.0 KiB
C
71 lines
3.0 KiB
C
/****************************************************************************
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* libs/libc/net/lib_inetnetwork.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <arpa/inet.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* name inet_network
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*
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* Description:
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* The inet_network() function converts the string pointed to by cp, in the
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* standard IPv4 dotted decimal notation, to an integer value suitable for
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* use as an Internet address.
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*
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* inet_aton() returns nonzero if the address is valid, zero if not.
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* The address supplied in cp can have one of the following forms:
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*
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* a.b.c.d Each of the four numeric parts specifies a byte of the address;
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* the bytes are assigned in left-to-right order to produce the
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* binary address.
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*
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* a.b.c Parts a and b specify the first two bytes of the binary address.
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* Part c is interpreted as a 16-bit value that defines the
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* rightmost two bytes of the binary address. This notation is
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* suitable for specifying (outmoded) Class B network addresses.
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*
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* a.b Part a specifies the first byte of the binary address. Part b is
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* interpreted as a 24-bit value that defines the rightmost three
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* bytes of the binary address. This notation is suitable for
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* specifying (outmoded) Class A network addresses.
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*
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* a The value a is interpreted as a 32-bit value that is stored
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* directly into the binary address without any byte rearrangement.
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*
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* Returned Value:
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* If input string cannot be recognized as a valid IPv4 number, function
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* returns zero.
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*
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****************************************************************************/
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in_addr_t inet_network(FAR const char *cp)
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{
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in_addr_t t = inet_addr(cp);
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return NTOHL(t);
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}
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