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