source: rtems-libbsd/freebsd/contrib/libpcap/etherent.c @ 3d1e767

#include <machine/rtems-bsd-user-space.h>

/*
 * 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.
 */

#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/libpcap/etherent.c,v 1.23 2006-10-04 18:09:22 guy Exp $ (LBL)";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef WIN32
#include <pcap-stdinc.h>
#else /* WIN32 */
#if HAVE_INTTYPES_H
#include <inttypes.h>
#elif HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif
#include <sys/types.h>
#endif /* WIN32 */

#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 xdtoi(int);
static inline int skip_space(FILE *);
static inline int skip_line(FILE *);

/* Hex digit to integer. */
static inline int
xdtoi(c)
        register int c;
{
        if (isdigit(c))
                return c - '0';
        else if (islower(c))
                return c - 'a' + 10;
        else
                return c - 'A' + 10;
}

static inline int
skip_space(f)
        FILE *f;
{
        int c;

        do {
                c = getc(f);
        } while (isspace(c) && c != '\n');

        return c;
}

static inline int
skip_line(f)
        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, d, i;
        char *bp;
        static struct pcap_etherent e;

        memset((char *)&e, 0, sizeof(e));
        do {
                /* Find addr */
                c = skip_space(fp);
                if (c == '\n')
                        continue;

                /* If this is a comment, or first thing on line
                   cannot be etehrnet address, skip the line. */
                if (!isxdigit(c)) {
                        c = skip_line(fp);
                        continue;
                }

                /* must be the start of an address */
                for (i = 0; i < 6; i += 1) {
                        d = xdtoi(c);
                        c = getc(fp);
                        if (isxdigit(c)) {
                                d <<= 4;
                                d |= xdtoi(c);
                                c = getc(fp);
                        }
                        e.addr[i] = d;
                        if (c != ':')
                                break;
                        c = getc(fp);
                }
                if (c == EOF)
                        break;

                /* Must be whitespace */
                if (!isspace(c)) {
                        c = skip_line(fp);
                        continue;
                }
                c = skip_space(fp);

                /* hit end of line... */
                if (c == '\n')
                        continue;

                if (c == '#') {
                        c = skip_line(fp);
                        continue;
                }

                /* pick up name */
                bp = e.name;
                /* Use 'd' to prevent buffer overflow. */
                d = sizeof(e.name) - 1;
                do {
                        *bp++ = c;
                        c = getc(fp);
                } while (!isspace(c) && c != EOF && --d > 0);
                *bp = '\0';

                /* Eat trailing junk */
                if (c != '\n')
                        (void)skip_line(fp);

                return &e;

        } while (c != EOF);

        return (NULL);
}