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/*
* 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.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /tcpdump/master/tcpdump/print-rip.c,v 1.40 1999/11/22 04:24:28 fenner Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#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 "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 */
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_entry_print(register int vers, register const struct rip_netinfo *ni)
{
register u_char *cp, *ep;
if (EXTRACT_16BITS(&ni->rip_family) != AF_INET) {
printf(" [family %d:", EXTRACT_16BITS(&ni->rip_family));
cp = (u_char *)&ni->rip_tag;
ep = (u_char *)&ni->rip_metric + sizeof(ni->rip_metric);
for (; cp < ep; cp += 2)
printf(" %04x", EXTRACT_16BITS(cp));
printf("]");
} else if (vers < 2) {
/* RFC 1058 */
printf(" %s", ipaddr_string(&ni->rip_dest));
} else {
/* RFC 1723 */
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("}");
}
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_cmd) {
case RIPCMD_REQUEST:
printf(" rip-req %d", length);
break;
case RIPCMD_RESPONSE:
j = length / sizeof(*ni);
if (j * sizeof(*ni) != length - 4)
printf(" rip-resp %d[%d]:", j, length);
else
printf(" rip-resp %d:", j);
trunc = (i / sizeof(*ni)) != j;
ni = (struct rip_netinfo *)(rp + 1);
for (; (i -= sizeof(*ni)) >= 0; ++ni)
rip_entry_print(rp->rip_vers, ni);
if (trunc)
printf("[|rip]");
break;
case RIPCMD_TRACEON:
printf(" rip-traceon %d: \"", length);
(void)fn_print((const u_char *)(rp + 1), snapend);
fputs("\"\n", stdout);
break;
case RIPCMD_TRACEOFF:
printf(" rip-traceoff %d", length);
break;
case RIPCMD_POLL:
printf(" rip-poll %d", length);
break;
case RIPCMD_POLLENTRY:
printf(" rip-pollentry %d", length);
break;
default:
printf(" rip-#%d %d", rp->rip_cmd, length);
break;
}
switch (rp->rip_vers) {
case 1:
case 2:
break;
default:
printf(" [vers %d]", rp->rip_vers);
break;
}
}
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