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rtems-libbsd/freebsd/contrib/tcpdump/print-rip.c
Chris Johns 8440506ee8 Add tcpdump and libpcap. 
- Update the file builder generator to handle generator specific cflags and
  includes. The tcpdump and libpcap have localised headers and need specific
  headers paths to see them. There are also module specific flags and these
  need to be passed to the lex and yacc generators.

- Add the tcpdump support.
2015-06-15 17:42:23 +10:00

275 lines
8.9 KiB
C
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#include <machine/rtems-bsd-user-space.h>
/*
* 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[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-rip.c,v 1.59 2006-03-23 14:58:44 hannes Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h" /* must come after interface.h */
#include "af.h"
struct rip {
u_int8_t rip_cmd; /* request/response */
u_int8_t rip_vers; /* protocol version # */
u_int8_t unused[2]; /* 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 */
static const struct tok rip_cmd_values[] = {
{ RIPCMD_REQUEST, "Request" },
{ RIPCMD_RESPONSE, "Response" },
{ RIPCMD_TRACEON, "Trace on" },
{ RIPCMD_TRACEOFF, "Trace off" },
{ RIPCMD_POLL, "Poll" },
{ RIPCMD_POLLENTRY, "Poll Entry" },
{ 0, NULL}
};
#define RIP_AUTHLEN 16
#define RIP_ROUTELEN 20
/*
* rfc 1723
*
* 0 1 2 3 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Command (1) | Version (1) | unused |
* +---------------+---------------+-------------------------------+
* | Address Family Identifier (2) | Route Tag (2) |
* +-------------------------------+-------------------------------+
* | IP Address (4) |
* +---------------------------------------------------------------+
* | Subnet Mask (4) |
* +---------------------------------------------------------------+
* | Next Hop (4) |
* +---------------------------------------------------------------+
* | Metric (4) |
* +---------------------------------------------------------------+
*
*/
struct rip_netinfo {
u_int16_t rip_family;
u_int16_t 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_v1(register const struct rip_netinfo *ni)
{
register u_short family;
/* RFC 1058 */
family = EXTRACT_16BITS(&ni->rip_family);
if (family != BSD_AFNUM_INET && family != 0) {
printf("\n\t AFI %s, ", tok2str(bsd_af_values, "Unknown (%u)", family));
print_unknown_data((u_int8_t *)&ni->rip_family,"\n\t ",RIP_ROUTELEN);
return;
}
if (EXTRACT_16BITS(&ni->rip_tag) ||
EXTRACT_32BITS(&ni->rip_dest_mask) ||
EXTRACT_32BITS(&ni->rip_router)) {
/* MBZ fields not zero */
print_unknown_data((u_int8_t *)&ni->rip_family,"\n\t ",RIP_ROUTELEN);
return;
}
if (family == 0) {
printf("\n\t AFI 0, %s, metric: %u",
ipaddr_string(&ni->rip_dest),
EXTRACT_32BITS(&ni->rip_metric));
return;
} /* BSD_AFNUM_INET */
printf("\n\t %s, metric: %u",
ipaddr_string(&ni->rip_dest),
EXTRACT_32BITS(&ni->rip_metric));
}
static unsigned
rip_entry_print_v2(register const struct rip_netinfo *ni, const unsigned remaining)
{
register u_short family;
family = EXTRACT_16BITS(&ni->rip_family);
if (family == 0xFFFF) { /* variable-sized authentication structures */
u_int16_t auth_type = EXTRACT_16BITS(&ni->rip_tag);
if (auth_type == 2) {
register u_char *p = (u_char *)&ni->rip_dest;
u_int i = 0;
printf("\n\t Simple Text Authentication data: ");
for (; i < RIP_AUTHLEN; p++, i++)
putchar (isprint(*p) ? *p : '.');
} else if (auth_type == 3) {
printf("\n\t Auth header:");
printf(" Packet Len %u,", EXTRACT_16BITS((u_int8_t *)ni + 4));
printf(" Key-ID %u,", *((u_int8_t *)ni + 6));
printf(" Auth Data Len %u,", *((u_int8_t *)ni + 7));
printf(" SeqNo %u,", EXTRACT_32BITS(&ni->rip_dest_mask));
printf(" MBZ %u,", EXTRACT_32BITS(&ni->rip_router));
printf(" MBZ %u", EXTRACT_32BITS(&ni->rip_metric));
} else if (auth_type == 1) {
printf("\n\t Auth trailer:");
print_unknown_data((u_int8_t *)&ni->rip_dest,"\n\t ",remaining);
return remaining; /* AT spans till the packet end */
} else {
printf("\n\t Unknown (%u) Authentication data:",
EXTRACT_16BITS(&ni->rip_tag));
print_unknown_data((u_int8_t *)&ni->rip_dest,"\n\t ",remaining);
}
} else if (family != BSD_AFNUM_INET && family != 0) {
printf("\n\t AFI %s", tok2str(bsd_af_values, "Unknown (%u)", family));
print_unknown_data((u_int8_t *)&ni->rip_tag,"\n\t ",RIP_ROUTELEN-2);
} else { /* BSD_AFNUM_INET or AFI 0 */
printf("\n\t AFI %s, %15s/%-2d, tag 0x%04x, metric: %u, next-hop: ",
tok2str(bsd_af_values, "%u", family),
ipaddr_string(&ni->rip_dest),
mask2plen(EXTRACT_32BITS(&ni->rip_dest_mask)),
EXTRACT_16BITS(&ni->rip_tag),
EXTRACT_32BITS(&ni->rip_metric));
if (EXTRACT_32BITS(&ni->rip_router))
printf("%s", ipaddr_string(&ni->rip_router));
else
printf("self");
}
return sizeof (*ni);
}
void
rip_print(const u_char *dat, u_int length)
{
register const struct rip *rp;
register const struct rip_netinfo *ni;
register u_int i, j;
if (snapend < dat) {
printf(" [|rip]");
return;
}
i = snapend - dat;
if (i > length)
i = length;
if (i < sizeof(*rp)) {
printf(" [|rip]");
return;
}
i -= sizeof(*rp);
rp = (struct rip *)dat;
printf("%sRIPv%u",
(vflag >= 1) ? "\n\t" : "",
rp->rip_vers);
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 packet, in hex.
*/
print_unknown_data((u_int8_t *)&rp->rip_cmd,"\n\t",length);
break;
default:
/* dump version and lets see if we know the commands name*/
printf(", %s, length: %u",
tok2str(rip_cmd_values,
"unknown command (%u)",
rp->rip_cmd),
length);
if (vflag < 1)
return;
switch (rp->rip_cmd) {
case RIPCMD_REQUEST:
case RIPCMD_RESPONSE:
j = length / sizeof(*ni);
printf(", routes: %u%s", j, rp->rip_vers == 2 ? " or less" : "");
ni = (struct rip_netinfo *)(rp + 1);
for (; i >= sizeof(*ni); ++ni) {
if (rp->rip_vers == 1)
{
rip_entry_print_v1(ni);
i -= sizeof(*ni);
}
else if (rp->rip_vers == 2)
i -= rip_entry_print_v2(ni, i);
else
break;
}
if (i)
printf("[|rip]");
break;
case RIPCMD_TRACEOFF:
case RIPCMD_POLL:
case RIPCMD_POLLENTRY:
break;
case RIPCMD_TRACEON:
/* fall through */
default:
if (vflag <= 1) {
if(!print_unknown_data((u_int8_t *)rp,"\n\t",length))
return;
}
break;
}
/* do we want to see an additionally hexdump ? */
if (vflag> 1) {
if(!print_unknown_data((u_int8_t *)rp,"\n\t",length))
return;
}
}
}
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