58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/*
|
|
** ETHER_LINE
|
|
**
|
|
** This routine parses the array pointed to by "line" (which should be
|
|
** from a file in the format of /etc/ethers) and returns in "eaddr" the
|
|
** ethernet address at the start of the line and the corresponding host
|
|
** name in "hostname". It assumes either tabs or spaces separate the
|
|
** two. The buffer pointed to by "hostname" must be big enough to hold
|
|
** the host name plus a NULL byte.
|
|
** The function returns 0 on success and 1 on failure.
|
|
** Arguments are assumed sensible. Null pointers will probably cause
|
|
** exceptions.
|
|
** Author: Gregory J. Sharp, July 1990
|
|
** Adapted to MINIX: Philip Homburg, May 1992
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <net/gen/ether.h>
|
|
#include <net/gen/if_ether.h>
|
|
|
|
int
|
|
ether_line(line, eaddr, hostname)
|
|
char * line;
|
|
struct ether_addr * eaddr;
|
|
char * hostname;
|
|
{
|
|
register int i;
|
|
register unsigned long val;
|
|
|
|
/* skip leading white space */
|
|
while (*line != '\n' && (*line == ' ' || *line == '\t'))
|
|
line++;
|
|
|
|
/* read the ethernet address */
|
|
for (i = 0; i < 5; i++)
|
|
{
|
|
val = (unsigned long) strtol(line, &line, 16);
|
|
if (val > 255 || *line++ != ':')
|
|
return 1;
|
|
eaddr->ea_addr[i] = val & 0xff;
|
|
}
|
|
val = (unsigned long) strtol(line, &line, 16);
|
|
if (val > 255 || (*line != ' ' && *line != '\t'))
|
|
return 1;
|
|
eaddr->ea_addr[i] = val & 0xff;
|
|
|
|
/* skip leading white space */
|
|
while (*line != '\n' && (*line == ' ' || *line == '\t'))
|
|
line++;
|
|
|
|
/* read in the hostname */
|
|
while (!isspace(*line))
|
|
*hostname++ = *line++;
|
|
*hostname = '\0';
|
|
return 0;
|
|
}
|