?? net_ascii.c
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/*
*********************************************************************************************************
* uC/TCP-IP
* The Embedded TCP/IP Suite
*
* (c) Copyright 2003-2006; Micrium, Inc.; Weston, FL
*
* All rights reserved. Protected by international copyright laws.
*
* uC/TCP-IP is provided in source form for FREE evaluation, for educational
* use or peaceful research. If you plan on using uC/TCP-IP in a commercial
* product you need to contact Micrium to properly license its use in your
* product. We provide ALL the source code for your convenience and to help
* you experience uC/TCP-IP. The fact that the source code is provided does
* NOT mean that you can use it without paying a licensing fee.
*
* Knowledge of the source code may NOT be used to develop a similar product.
*
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* NETWORK ASCII LIBRARY
*
* Filename : net_ascii.c
* Version : V1.87
* Programmer(s) : ITJ
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#define NET_ASCII_MODULE
#include <net.h>
/*$PAGE*/
/*
*********************************************************************************************************
* LOCAL DEFINES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL DATA TYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL TABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* LOCAL CONFIGURATION ERRORS
*********************************************************************************************************
*/
/*$PAGE*/
/*
*********************************************************************************************************
* NetASCII_Str_to_MAC()
*
* Description : Convert a MAC address ASCII string to a MAC address.
*
* Argument(s) : paddr_mac_ascii Pointer to an ASCII string that contains a MAC address (see Note #1).
*
* paddr_mac Pointer to a memory buffer that will receive the converted MAC address
* (see Note #2) :
*
* MAC address represented by ASCII string, if NO errors.
*
* MAC address cleared to all zeros (see Note #2c), otherwise.
*
* perr Pointer to variable that will receive the return error code from this function :
*
* NET_ASCII_ERR_NONE MAC address successfully converted.
* NET_ASCII_ERR_NULL_PTR Argument 'paddr_mac_ascii'/'paddr_mac'
* passed a NULL pointer.
* NET_ASCII_ERR_INVALID_LEN Invalid ASCII string length.
* NET_ASCII_ERR_INVALID_CHAR Invalid ASCII character.
* NET_ASCII_ERR_INVALID_CHAR_LEN Invalid ASCII character length.
* NET_ASCII_ERR_INVALID_CHAR_SEQ Invalid ASCII character sequence.
*
* Return(s) : none.
*
* Caller(s) : Application.
*
* This function is a network protocol suite application interface (API) function & MAY be
* called by application function(s).
*
* Note(s) : (1) (a) The MAC address ASCII string MUST :
*
* (1) Include ONLY hexadecimal values & the colon character (':') ; ALL other
* characters are trapped as invalid, including any leading or trailing
* characters.
*
* (2) (A) Include EXACTLY six hexadecimal values ...
* (B) ... separated ...
* (C) ... by EXACTLY five colon characters.
*
* (3) Ensure that each hexadecimal value's number of digits does NOT exceed
* the maximum number of digits, NET_ASCII_CHAR_MAX_OCTET_ADDR_MAC (2).
*
* (b) In other words, the MAC address ASCII string separates six hexadecimal octet
* values by the colon character (':'). Each hexadecimal value represents one
* octet of the MAC address starting with the most significant octet in network
* order.
*
* MAC Address Examples :
*
* MAC ADDRESS ASCII STRING HEXADECIMAL EQUIVALENT
*
* "00:1A:07:AC:22:09" = 0x001A07AC2209
* "76:4E:01:D2:8C:0B" = 0x764E01D28C0B
* "80:Db:fE:0b:34:52" = 0X80DBFE0B3452
* -- -- -- --
* ^ ^ ^ ^
* | | | |
* MSO LSO MSO LSO
*
* where
*
* MSO Most Significant Octet in MAC Address
* LSO Least Significant Octet in MAC Address
*
*
* (2) (a) The size of the memory buffer that will receive the returned MAC address MUST be
* greater than or equal to NET_ASCII_NBR_OCTET_ADDR_MAC.
*
* (b) MAC address accessed by octets in memory buffer array.
*
* (c) MAC address memory array cleared in case of any error(s).
*********************************************************************************************************
*/
/*$PAGE*/
void NetASCII_Str_to_MAC (CPU_CHAR *paddr_mac_ascii,
CPU_INT08U *paddr_mac,
NET_ERR *perr)
{
CPU_CHAR *pchar_cur;
CPU_CHAR *pchar_prev;
CPU_INT08U *paddr_cur;
CPU_INT16U addr_octet_val;
CPU_INT16U addr_octet_val_dig;
CPU_INT32U addr_nbr_octet;
CPU_INT08U addr_nbr_octet_dig;
/* -------------- VALIDATE PTRS --------------- */
if (paddr_mac == (CPU_INT08U *)0) {
*perr = NET_ASCII_ERR_NULL_PTR;
return;
}
if (paddr_mac_ascii == (CPU_CHAR *)0) {
Mem_Clr((void *)paddr_mac, /* Clr rtn addr on err (see Note #2c). */
(CPU_SIZE_T)NET_ASCII_NBR_OCTET_ADDR_MAC);
*perr = NET_ASCII_ERR_NULL_PTR;
return;
}
/*$PAGE*/
pchar_cur = (CPU_CHAR *)paddr_mac_ascii;
pchar_prev = (CPU_CHAR *)0;
paddr_cur = (CPU_INT08U *)paddr_mac;
addr_octet_val = 0x0000;
addr_nbr_octet = 0;
addr_nbr_octet_dig = 0;
while ((pchar_cur != (CPU_CHAR *)0) && /* Parse ALL non-NULL chars in ASCII str. */
(*pchar_cur != (CPU_CHAR )0)) {
switch (*pchar_cur) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
addr_nbr_octet_dig++; /* If nbr digs > max (see Note #1a3); ... */
if (addr_nbr_octet_dig > NET_ASCII_CHAR_MAX_OCTET_ADDR_MAC) {
Mem_Clr((void *)paddr_mac, /* ... clr rtn addr (see Note #2c) ... */
(CPU_SIZE_T)NET_ASCII_NBR_OCTET_ADDR_MAC);
*perr = NET_ASCII_ERR_INVALID_CHAR_LEN; /* ... & rtn err. */
return;
}
switch (*pchar_cur) { /* Convert ASCII char into hex val. */
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
addr_octet_val_dig = (CPU_INT16U)(*pchar_cur - '0');
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
addr_octet_val_dig = (CPU_INT16U)(*pchar_cur - 'A' + 10);
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
addr_octet_val_dig = (CPU_INT16U)(*pchar_cur - 'a' + 10);
break;
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