120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/*******************************************************************************
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WINC3400 Wireless Driver
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File Name:
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inet_addr.c
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Summary:
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Implementation of standard inet_addr function.
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Description:
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Implementation of standard inet_addr function.
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*******************************************************************************/
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//DOM-IGNORE-BEGIN
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/*******************************************************************************
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* Copyright (C) 2021 Microchip Technology Inc. and its subsidiaries.
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*
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* Subject to your compliance with these terms, you may use Microchip software
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* and any derivatives exclusively with Microchip products. It is your
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* responsibility to comply with third party license terms applicable to your
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* use of third party software (including open source software) that may
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* accompany Microchip software.
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*
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* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
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* EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED
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* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE,
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* INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE OF ANY KIND
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* WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS
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* BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE
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* FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN
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* ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY,
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* THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THIS SOFTWARE.
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*******************************************************************************/
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#include <stdint.h>
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#include "socket.h"
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in_addr_t inet_addr(const char *cp)
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{
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uint8_t i,l;
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uint16_t t;
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uint32_t ip;
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char c;
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ip = 0;
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for (i=0; i<4; i++)
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{
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t = 0;
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ip >>= 8;
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// Count non-delimiter or terminator characters
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for (l=0; l<4; l++)
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{
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c = cp[l];
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if (('.' == c) || ('\0' == c))
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{
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break;
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}
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}
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// There must be 1 to 3 characters
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if ((0 == l) || (4 == l))
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{
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return 0;
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}
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c = *cp++;
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// First digit can't be '0' unless it's the only one
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if ((l > 1) && (c == '0'))
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{
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return 0;
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}
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while(l--)
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{
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// Each digit must be decimal
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if ((c < '0') || (c > '9'))
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{
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return 0;
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}
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t = (t * 10) + (c - '0');
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c = *cp++;
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}
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// Total accumulated number must be less than 256
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if (t > 255)
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{
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return 0;
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}
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// Pack number into 32 bit IP address representation
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ip |= ((uint32_t)t << 24);
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// First three numbers must terminate with '.', last one with '\0's
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if ((('\0' == c) && (i != 3)) || (('\0' != c) && (i == 3)))
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{
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return 0;
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}
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}
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return ip;
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}
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//DOM-IGNORE-END
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