244 lines
6.6 KiB
C
244 lines
6.6 KiB
C
/* $NetBSD: print-rip.c,v 1.7 2001/01/28 10:05:07 itojun Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989, 1990, 1991, 1993, 1994, 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static const char rcsid[] =
|
|
"@(#) Header: print-rip.c,v 1.36 96/11/29 01:22:50 leres Exp (LBL)";
|
|
#else
|
|
__RCSID("$NetBSD: print-rip.c,v 1.7 2001/01/28 10:05:07 itojun Exp $");
|
|
#endif
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/udp_var.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h" /* must come after interface.h */
|
|
|
|
struct rip {
|
|
u_char rip_cmd; /* request/response */
|
|
u_char rip_vers; /* protocol version # */
|
|
u_short rip_zero2; /* unused */
|
|
};
|
|
#define RIPCMD_REQUEST 1 /* want info */
|
|
#define RIPCMD_RESPONSE 2 /* responding to request */
|
|
#define RIPCMD_TRACEON 3 /* turn tracing on */
|
|
#define RIPCMD_TRACEOFF 4 /* turn it off */
|
|
#define RIPCMD_POLL 5 /* want info from everybody */
|
|
#define RIPCMD_POLLENTRY 6 /* poll for entry */
|
|
|
|
#define RIP_AUTHLEN 16
|
|
|
|
struct rip_netinfo {
|
|
u_short rip_family;
|
|
u_short rip_tag;
|
|
u_int32_t rip_dest;
|
|
u_int32_t rip_dest_mask;
|
|
u_int32_t rip_router;
|
|
u_int32_t rip_metric; /* cost of route */
|
|
};
|
|
|
|
static void
|
|
rip_printblk(const u_char *cp, const u_char *ep)
|
|
{
|
|
for (; cp < ep; cp += 2)
|
|
printf(" %04x", EXTRACT_16BITS(cp));
|
|
return;
|
|
}
|
|
|
|
static void
|
|
rip_entry_print_v1(register int vers, register const struct rip_netinfo *ni)
|
|
{
|
|
register u_short family;
|
|
|
|
/* RFC 1058 */
|
|
family = EXTRACT_16BITS(&ni->rip_family);
|
|
if (family != AF_INET) {
|
|
printf(" [family %d:", family);
|
|
rip_printblk((u_char *)&ni->rip_tag,
|
|
(u_char *)&ni->rip_metric +
|
|
sizeof(ni->rip_metric));
|
|
printf("]");
|
|
return;
|
|
}
|
|
if (ni->rip_tag || ni->rip_dest_mask || ni->rip_router) {
|
|
/* MBZ fields not zero */
|
|
printf(" [");
|
|
rip_printblk((u_char *)&ni->rip_family,
|
|
(u_char *)&ni->rip_metric +
|
|
sizeof(ni->rip_metric));
|
|
printf("]");
|
|
return;
|
|
}
|
|
printf(" {%s}(%d)", ipaddr_string(&ni->rip_dest),
|
|
EXTRACT_32BITS(&ni->rip_metric));
|
|
}
|
|
|
|
static void
|
|
rip_entry_print_v2(register int vers, register const struct rip_netinfo *ni)
|
|
{
|
|
register u_char *p;
|
|
register u_short family;
|
|
u_char buf[RIP_AUTHLEN];
|
|
|
|
/* RFC 1723 */
|
|
family = EXTRACT_16BITS(&ni->rip_family);
|
|
if (family == 0xFFFF) {
|
|
if (EXTRACT_16BITS(&ni->rip_tag) == 2) {
|
|
memcpy(buf, &ni->rip_dest, sizeof(buf));
|
|
buf[sizeof(buf)-1] = '\0';
|
|
for (p = buf; *p; p++) {
|
|
if (!isprint(*p))
|
|
break;
|
|
}
|
|
if (!*p) {
|
|
printf(" [password %s]", buf);
|
|
} else {
|
|
printf(" [password: ");
|
|
rip_printblk((u_char *)&ni->rip_dest,
|
|
(u_char *)&ni->rip_metric +
|
|
sizeof(ni->rip_metric));
|
|
printf("]");
|
|
}
|
|
} else {
|
|
printf(" [auth %d:",
|
|
EXTRACT_16BITS(&ni->rip_tag));
|
|
rip_printblk((u_char *)&ni->rip_dest,
|
|
(u_char *)&ni->rip_metric +
|
|
sizeof(ni->rip_metric));
|
|
printf("]");
|
|
}
|
|
} else if (family != AF_INET) {
|
|
printf(" [family %d:", family);
|
|
rip_printblk((u_char *)&ni->rip_tag,
|
|
(u_char *)&ni->rip_metric +
|
|
sizeof(ni->rip_metric));
|
|
printf("]");
|
|
return;
|
|
} else { /* AF_INET */
|
|
printf(" {%s", ipaddr_string(&ni->rip_dest));
|
|
if (ni->rip_dest_mask)
|
|
printf("/%s", ipaddr_string(&ni->rip_dest_mask));
|
|
if (ni->rip_router)
|
|
printf("->%s", ipaddr_string(&ni->rip_router));
|
|
if (ni->rip_tag)
|
|
printf(" tag %04x", EXTRACT_16BITS(&ni->rip_tag));
|
|
printf("}(%d)", EXTRACT_32BITS(&ni->rip_metric));
|
|
}
|
|
}
|
|
|
|
void
|
|
rip_print(const u_char *dat, u_int length)
|
|
{
|
|
register const struct rip *rp;
|
|
register const struct rip_netinfo *ni;
|
|
register int i, j, trunc;
|
|
|
|
i = min(length, snapend - dat) - sizeof(*rp);
|
|
if (i < 0) {
|
|
printf(" [|rip]");
|
|
return;
|
|
}
|
|
|
|
rp = (struct rip *)dat;
|
|
switch (rp->rip_vers) {
|
|
case 0:
|
|
/*
|
|
* RFC 1058.
|
|
*
|
|
* XXX - RFC 1058 says
|
|
*
|
|
* 0 Datagrams whose version number is zero are to be ignored.
|
|
* These are from a previous version of the protocol, whose
|
|
* packet format was machine-specific.
|
|
*
|
|
* so perhaps we should just dump the first few words of
|
|
* the packet, in hex.
|
|
*/
|
|
printf(" RIPv0: ");
|
|
ni = (struct rip_netinfo *)(rp + 1);
|
|
rip_printblk((u_char *)&ni->rip_family,
|
|
(u_char *)&ni->rip_metric +
|
|
sizeof(ni->rip_metric));
|
|
break;
|
|
default:
|
|
switch (rp->rip_cmd) {
|
|
case RIPCMD_REQUEST:
|
|
printf(" RIPv%d-req %d", rp->rip_vers, length);
|
|
break;
|
|
case RIPCMD_RESPONSE:
|
|
j = length / sizeof(*ni);
|
|
if (j * sizeof(*ni) != length - 4)
|
|
printf(" RIPv%d-resp [items %d] [%d]:",
|
|
rp->rip_vers, j, length);
|
|
else
|
|
printf(" RIPv%d-resp [items %d]:",
|
|
rp->rip_vers, j);
|
|
trunc = (i / sizeof(*ni)) != j;
|
|
ni = (struct rip_netinfo *)(rp + 1);
|
|
for (; (i -= sizeof(*ni)) >= 0; ++ni) {
|
|
if (rp->rip_vers == 1)
|
|
rip_entry_print_v1(rp->rip_vers, ni);
|
|
else
|
|
rip_entry_print_v2(rp->rip_vers, ni);
|
|
}
|
|
if (trunc)
|
|
printf("[|rip]");
|
|
break;
|
|
case RIPCMD_TRACEON:
|
|
printf(" RIPv%d-traceon %d: \"", rp->rip_vers, length);
|
|
(void)fn_print((const u_char *)(rp + 1), snapend);
|
|
fputs("\"\n", stdout);
|
|
break;
|
|
case RIPCMD_TRACEOFF:
|
|
printf(" RIPv%d-traceoff %d", rp->rip_vers, length);
|
|
break;
|
|
case RIPCMD_POLL:
|
|
printf(" RIPv%d-poll %d", rp->rip_vers, length);
|
|
break;
|
|
case RIPCMD_POLLENTRY:
|
|
printf(" RIPv%d-pollentry %d", rp->rip_vers, length);
|
|
break;
|
|
default:
|
|
printf(" RIPv%d-#%d %d", rp->rip_vers, rp->rip_cmd,
|
|
length);
|
|
break;
|
|
}
|
|
}
|
|
}
|