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/*
* Copyright (c) 1990, 1993, 1994, 1995, 1996
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pcap-types.h>
#include <ctype.h>
#include <memory.h>
#include <stdio.h>
#include <string.h>
#include "pcap-int.h"
#include <pcap/namedb.h>
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
static inline int skip_space(FILE *);
static inline int skip_line(FILE *);
/* Hex digit to integer. */
static inline u_char
xdtoi(u_char c)
{
if (isdigit(c))
return (u_char)(c - '0');
else if (islower(c))
return (u_char)(c - 'a' + 10);
else
return (u_char)(c - 'A' + 10);
}
static inline int
skip_space(FILE *f)
{
int c;
do {
c = getc(f);
} while (isspace(c) && c != '\n');
return c;
}
static inline int
skip_line(FILE *f)
{
int c;
do
c = getc(f);
while (c != '\n' && c != EOF);
return c;
}
struct pcap_etherent *
pcap_next_etherent(FILE *fp)
{
register int c, i;
u_char d;
char *bp;
size_t namesize;
static struct pcap_etherent e;
memset((char *)&e, 0, sizeof(e));
for (;;) {
/* Find addr */
c = skip_space(fp);
if (c == EOF)
return (NULL);
if (c == '\n')
continue;
/* If this is a comment, or first thing on line
cannot be Ethernet address, skip the line. */
if (!isxdigit(c)) {
c = skip_line(fp);
if (c == EOF)
return (NULL);
continue;
}
/* must be the start of an address */
for (i = 0; i < 6; i += 1) {
d = xdtoi((u_char)c);
c = getc(fp);
if (c == EOF)
return (NULL);
if (isxdigit(c)) {
d <<= 4;
d |= xdtoi((u_char)c);
c = getc(fp);
if (c == EOF)
return (NULL);
}
e.addr[i] = d;
if (c != ':')
break;
c = getc(fp);
if (c == EOF)
return (NULL);
}
/* Must be whitespace */
if (!isspace(c)) {
c = skip_line(fp);
if (c == EOF)
return (NULL);
continue;
}
c = skip_space(fp);
if (c == EOF)
return (NULL);
/* hit end of line... */
if (c == '\n')
continue;
if (c == '#') {
c = skip_line(fp);
if (c == EOF)
return (NULL);
continue;
}
/* pick up name */
bp = e.name;
/* Use 'namesize' to prevent buffer overflow. */
namesize = sizeof(e.name) - 1;
do {
*bp++ = (u_char)c;
c = getc(fp);
if (c == EOF)
return (NULL);
} while (!isspace(c) && --namesize != 0);
*bp = '\0';
/* Eat trailing junk */
if (c != '\n')
(void)skip_line(fp);
return &e;
}
}
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