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/*
* Copyright (c) 1990, 1992, 1993, 1994, 1995, 1996, 1997, 1998
* 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[] =
"@(#) $Header: ec.c,v 1.25 98/02/09 16:35:16 leres Exp $ (LBL)";
#endif
/*
* ec - manufactures ethernet code routines
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#if __STDC__
struct mbuf;
struct rtentry;
#endif
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "gnuc.h"
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
#include "arpwatch.h"
#include "ec.h"
#include "util.h"
/* Basic data structure */
struct ecent {
u_int32_t o; /* first 3 octets */
char *text; /* associated text */
};
static struct ecent *list;
static u_int ec_last = 0;
static u_int ec_len = 0;
static u_int32_t ec_a2o(char *);
/* Convert an 3 octets from an ethernet address to a u_int32_t */
static u_int32_t
ec_a2o(register char *cp)
{
register u_char *e;
u_int32_t o;
char xbuf[128];
(void)sprintf(xbuf, "%.32s:0:0:0", cp);
if ((e = str2e(xbuf)) == NULL)
return (0);
o = 0;
BCOPY(e, &o, 3);
return (o);
}
/* Add a ethernet code to the database */
int
ec_add(register u_int32_t o, register char *text)
{
if (ec_last >= ec_len) {
if (list == NULL) {
ec_len = 512;
list = malloc(ec_len * sizeof(*list));
} else {
ec_len *= 2;
list = realloc(list, ec_len * sizeof(*list));
}
if (list == NULL) {
syslog(LOG_ERR, "ec_add(): malloc: %m");
exit(1);
}
}
list[ec_last].o = o;
list[ec_last].text = savestr(text);
++ec_last;
return (1);
}
/* Find the manufacture for a given ethernet address */
char *
ec_find(register u_char *e)
{
u_int32_t o;
register int i;
o = 0;
BCOPY(e, &o, 3);
for (i = 0; i < ec_last; ++i)
if (list[i].o == o)
return (list[i].text);
return (NULL);
}
/* Loop through the ethernet code database */
int
ec_loop(register FILE *f, ec_process fn)
{
register int n;
register char *cp, *cp2, *text;
register u_int32_t o;
register int sawblank;
char line[1024];
n = 0;
while (fgets(line, sizeof(line), f)) {
++n;
cp = line;
cp2 = cp + strlen(cp) - 1;
if (cp2 >= cp && *cp2 == '\n')
*cp2++ = '\0';
if (*cp == '#')
continue;
if ((cp2 = strchr(cp, '\t')) == 0) {
syslog(LOG_ERR,
"ec_loop(): syntax error #1 line %d", n);
continue;
}
/* 3 octets come first */
*cp2++ = '\0';
text = cp2;
o = ec_a2o(cp);
if (o == 0) {
syslog(LOG_ERR,
"ec_loop(): syntax error #2 line %d", n);
continue;
}
/* Compress blanks */
cp = cp2 = text;
sawblank = 0;
while (*cp != '\0') {
if (sawblank) {
*cp2++ = ' ';
sawblank = 0;
}
*cp2++ = *cp++;
while (isspace(*cp)) {
++cp;
sawblank = 1;
}
}
*cp2 = '\0';
if (!(*fn)(o, text))
return (0);
}
return (1);
}
/* DECnet local logical address prefix */
static u_char decnet[3] = { 0xaa, 0x0, 0x4 };
/* Returns true if an ethernet address is decnet, else false */
int
isdecnet(register u_char *e)
{
return (MEMCMP(e, decnet, sizeof(decnet)) == 0);
}
/* Convert an ascii ethernet string to ethernet address */
u_char *
str2e(register char *str)
{
register int i;
int n[6];
static u_char e[6];
MEMSET(n, 0, sizeof(n));
(void) sscanf(str, "%x:%x:%x:%x:%x:%x",
&n[0], &n[1], &n[2], &n[3], &n[4], &n[5]);
for (i = 0; i < 6; ++i)
e[i] = n[i];
return (e);
}
/* Convert an ethernet address to an ascii ethernet string */
char *
e2str(register u_char *e)
{
static char str[32];
(void)sprintf(str, "%x:%x:%x:%x:%x:%x",
e[0], e[1], e[2], e[3], e[4], e[5]);
return (str);
}
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