net_aton(3C)

NAME

net_aton(), net_ntoa() − network station address string conversion routines

SYNOPSIS

#include <sys/netio.h>

char *net_aton(char *dstr, const char *sstr, int size);

char *net_ntoa(char *dstr, const char *sstr, int size);

DESCRIPTION

net_aton() and net_ntoa() translate station addresses between hexadecimal, octal or decimal, and binary formats:

net_aton() converts a hexadecimal, octal or decimal address to a binary address;

net_ntoa() converts a binary address to an ASCII hexadecimal address.

Both routines are provided in the standard C library and are loaded automatically during compilation.

net_aton Parameters

The following parameters are used by net_aton():

dstr Pointer to the binary address returned by the function.

sstr Pointer to a null-terminated ASCII form of a station address (Ethernet or IEEE 802.3). This address can be an octal, decimal, or hexadecimal number as used in the C language (in other words, a leading 0x or 0X implies hexadecimal; a leading 0 implies octal; otherwise, the number is interpreted as decimal).

size Length of the binary address to be returned in dstr. The length is 6 for Ethernet/ IEEE 802.3 addresses.

net_ntoa Parameters

net_ntoa() converts a 48-bit binary station address to its ASCII hexadecimal equivalent. The following parameters are used by net_ntoa():

dstr Pointer to the ASCII hexadecimal address returned by the function. dstr is null-terminated and padded with leading zeroes if necessary. dstr must be at least (2 × size + 3) bytes long to accommodate the size of the converted address.

sstr Pointer to a station address in its binary form.

size Length of sstr.

RETURN VALUE

net_aton() and net_ntoa() return NULL if any error occurs.

EXAMPLES

#include <netio.h>
#define destination_addr "0x00DD0002AD00"
     ...
struct fis arg;
char str[16];
     ...
(void) net_aton(arg.value.s, destination_addr, 6);
              /* arg.value.s = "<48-bit binary value>" */
(void) net_ntoa(str, arg.value.s, 6);
              /* str = "0x00DD0002AD00" */

AUTHOR

net_aton() was developed by HP.

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