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/*
* Copyright (c) 1996, 1997, 1999, 2000, 2004
* 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[] =
"@(#) $Id: util.c,v 1.10 2004/01/22 22:25:27 leres Exp $ (LBL)";
#endif
/*
* util - arpwatch utility routines
*/
#include <sys/types.h>
#include <sys/file.h>
#include <fcntl.h>
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <netdb.h>
#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 "db.h"
#include "ec.h"
#include "file.h"
#include "util.h"
#include "addresses.h"
char *arpdir = ARPDIR;
char *arpfile = ARPFILE;
char *ethercodes = ETHERCODES;
/* Broadcast ethernet addresses */
u_char zero[6] = { 0, 0, 0, 0, 0, 0 };
u_char allones[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
int debug = 0;
int initializing = 1; /* true if initializing */
/**/
/**/
int nopromisc = 0; /* don't activate promisc mode */
/**/
/**/
int allsubnets = 0; /* watch all attached subnets */
/**/
/**/
char *mailaddress = WATCHER;
/**/
/**/
int quiet = 0; /* send mail by default */
/**/
/**/
/* syslog() helper routine */
void
dosyslog(register int p, register char *s, register u_int32_t a,
register u_char *ea, register u_char *ha, char *interface)
{
char xbuf[64];
/* No report until we're initialized */
if (initializing)
return;
/* Display both ethernet addresses if they don't match */
(void)strcpy(xbuf, e2str(ea));
if (ha != NULL && MEMCMP(ea, ha, 6) != 0) {
(void)strcat(xbuf, " (");
(void)strcat(xbuf, e2str(ha));
(void)strcat(xbuf, ")");
}
if (debug)
fprintf(stderr, "%s: %s %s %s %s\n", prog, s, intoa(a),
xbuf, interface);
else
syslog(p, "%s %s %s %s", s, intoa(a), xbuf, interface);
}
static FILE *dumpf;
void
dumpone(register u_int32_t a, register u_char *e, register time_t t,
register char *h, char *interface)
{
(void)fprintf(dumpf, "%s\t%s\t%u\t%s\t%s\n", e2str(e), intoa(a),
(u_int32_t)t, ((h != NULL)?h:""),
((interface != NULL)?interface:""));
}
int
dump(void)
{
register int fd;
char oldarpfile[256], newarpfile[256];
(void)sprintf(oldarpfile, "%s-", arpfile);
(void)sprintf(newarpfile, "%s.new", arpfile);
if ((fd = creat(newarpfile, 0644)) < 0) {
syslog(LOG_ERR, "creat(%s): %m", newarpfile);
return(0);
}
if ((dumpf = fdopen(fd, "w")) == NULL) {
syslog(LOG_ERR, "fdopen(%s): %m", newarpfile);
return(0);
}
(void)ent_loop(dumpone);
if (ferror(dumpf)) {
syslog(LOG_ERR, "ferror %s: %m", newarpfile);
return(0);
}
(void)fclose(dumpf);
if (rename(arpfile, oldarpfile) < 0) {
syslog(LOG_ERR, "rename %s -> %s: %m", arpfile, oldarpfile);
return(0);
}
if (rename(newarpfile, arpfile) < 0) {
syslog(LOG_ERR, "rename %s -> %s: %m", newarpfile, arpfile);
return(0);
}
return(1);
}
/* Initialize the databases */
int
readdata(void)
{
register FILE *f;
if ((f = fopen(arpfile, "r")) == NULL) {
syslog(LOG_ERR, "fopen(%s): %m", arpfile);
return(0);
}
if (!file_loop(f, ent_add, arpfile)) {
(void)fclose(f);
return(0);
}
(void)fclose(f);
/* It's not fatal if we can't open the ethercodes file */
if ((f = fopen(ethercodes, "r")) != NULL) {
(void)ec_loop(f, ec_add, ethercodes);
(void)fclose(f);
}
return(1);
}
char *
savestr(register const char *str)
{
register int i;
register char *cp;
static char *strptr = NULL;
static int strsize = 0;
i = strlen(str) + 1;
if (i > strsize) {
strsize = 512;
strptr = malloc(strsize);
if (strptr == NULL) {
syslog(LOG_ERR, "savestr(): malloc: %m");
exit(1);
}
memset(strptr, 0, strsize);
}
(void)strcpy(strptr, str);
cp = strptr;
strptr += i;
strsize -= i;
return (cp);
}
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