1996-08-19 20:34:12 +00:00
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/*
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1998-09-15 19:46:59 +00:00
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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1996-08-19 20:34:12 +00:00
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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2000-01-30 01:05:24 +00:00
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*
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* $FreeBSD$
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1996-08-19 20:34:12 +00:00
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*/
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2015-01-06 19:03:11 +00:00
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#define NETDISSECT_REWORKED
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2000-01-30 01:05:24 +00:00
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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1996-08-19 20:34:12 +00:00
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#endif
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2004-03-31 14:57:24 +00:00
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#include <tcpdump-stdinc.h>
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1996-08-19 20:34:12 +00:00
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#include <string.h>
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#include "interface.h"
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2015-01-06 19:03:11 +00:00
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#include "addrtoname.h"
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1996-08-19 20:34:12 +00:00
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#include "extract.h" /* must come after interface.h */
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2001-04-03 07:50:46 +00:00
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#include "ip.h"
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2004-03-31 14:57:24 +00:00
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#include "ipproto.h"
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1996-08-19 20:34:12 +00:00
|
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2015-01-06 19:03:11 +00:00
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static const char tstr[] = "[|ip]";
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static const struct tok ip_option_values[] = {
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2005-05-29 19:09:28 +00:00
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{ IPOPT_EOL, "EOL" },
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{ IPOPT_NOP, "NOP" },
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{ IPOPT_TS, "timestamp" },
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{ IPOPT_SECURITY, "security" },
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{ IPOPT_RR, "RR" },
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{ IPOPT_SSRR, "SSRR" },
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{ IPOPT_LSRR, "LSRR" },
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{ IPOPT_RA, "RA" },
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2007-10-16 02:31:48 +00:00
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{ IPOPT_RFC1393, "traceroute" },
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2005-05-29 19:09:28 +00:00
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{ 0, NULL }
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};
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1996-08-19 20:34:12 +00:00
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/*
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* print the recorded route in an IP RR, LSRR or SSRR option.
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*/
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static void
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2015-01-06 19:03:11 +00:00
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ip_printroute(netdissect_options *ndo,
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register const u_char *cp, u_int length)
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1996-08-19 20:34:12 +00:00
|
|
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{
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2004-03-31 14:57:24 +00:00
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register u_int ptr;
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1996-08-19 20:34:12 +00:00
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register u_int len;
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|
2004-03-31 14:57:24 +00:00
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if (length < 3) {
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2015-01-06 19:03:11 +00:00
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ND_PRINT((ndo, " [bad length %u]", length));
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2004-03-31 14:57:24 +00:00
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return;
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}
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1996-08-19 20:34:12 +00:00
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if ((length + 1) & 3)
|
2015-01-06 19:03:11 +00:00
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ND_PRINT((ndo, " [bad length %u]", length));
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2004-03-31 14:57:24 +00:00
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ptr = cp[2] - 1;
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1996-08-19 20:34:12 +00:00
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|
if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1)
|
2015-01-06 19:03:11 +00:00
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ND_PRINT((ndo, " [bad ptr %u]", cp[2]));
|
1996-08-19 20:34:12 +00:00
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for (len = 3; len < length; len += 4) {
|
2015-01-06 19:03:11 +00:00
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ND_PRINT((ndo, " %s", ipaddr_string(ndo, &cp[len])));
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if (ptr > len)
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ND_PRINT((ndo, ","));
|
1996-08-19 20:34:12 +00:00
|
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}
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}
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|
2004-03-31 14:57:24 +00:00
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/*
|
2005-05-29 19:09:28 +00:00
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* If source-routing is present and valid, return the final destination.
|
2004-03-31 14:57:24 +00:00
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* Otherwise, return IP destination.
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*
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* This is used for UDP and TCP pseudo-header in the checksum
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|
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* calculation.
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*/
|
2015-01-06 19:03:11 +00:00
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static uint32_t
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ip_finddst(netdissect_options *ndo,
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const struct ip *ip)
|
2004-03-31 14:57:24 +00:00
|
|
|
{
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int length;
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int len;
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const u_char *cp;
|
2015-01-06 19:03:11 +00:00
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uint32_t retval;
|
2004-03-31 14:57:24 +00:00
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cp = (const u_char *)(ip + 1);
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length = (IP_HL(ip) << 2) - sizeof(struct ip);
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for (; length > 0; cp += len, length -= len) {
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int tt;
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|
2015-01-06 19:03:11 +00:00
|
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|
ND_TCHECK(*cp);
|
2004-03-31 14:57:24 +00:00
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tt = *cp;
|
2005-05-29 19:09:28 +00:00
|
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|
if (tt == IPOPT_EOL)
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break;
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else if (tt == IPOPT_NOP)
|
2004-03-31 14:57:24 +00:00
|
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len = 1;
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else {
|
2015-01-06 19:03:11 +00:00
|
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|
ND_TCHECK(cp[1]);
|
2004-03-31 14:57:24 +00:00
|
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|
len = cp[1];
|
2005-05-29 19:09:28 +00:00
|
|
|
if (len < 2)
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|
break;
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
2015-01-06 19:03:11 +00:00
|
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|
ND_TCHECK2(*cp, len);
|
2004-03-31 14:57:24 +00:00
|
|
|
switch (tt) {
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|
|
|
|
|
case IPOPT_SSRR:
|
|
|
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case IPOPT_LSRR:
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|
|
|
if (len < 7)
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2015-01-06 19:03:11 +00:00
|
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|
UNALIGNED_MEMCPY(&retval, cp + len - 4, 4);
|
2004-03-31 14:57:24 +00:00
|
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|
return retval;
|
|
|
|
}
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|
|
|
}
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trunc:
|
2015-01-06 19:03:11 +00:00
|
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|
UNALIGNED_MEMCPY(&retval, &ip->ip_dst.s_addr, sizeof(uint32_t));
|
2005-05-29 19:09:28 +00:00
|
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return retval;
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
|
|
|
|
2012-05-14 08:01:48 +00:00
|
|
|
/*
|
|
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|
* Compute a V4-style checksum by building a pseudoheader.
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|
*/
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int
|
2015-01-06 19:03:11 +00:00
|
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|
nextproto4_cksum(netdissect_options *ndo,
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|
const struct ip *ip, const uint8_t *data,
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u_int len, u_int covlen, u_int next_proto)
|
2012-05-14 08:01:48 +00:00
|
|
|
{
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|
|
|
struct phdr {
|
2015-01-06 19:03:11 +00:00
|
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|
uint32_t src;
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|
|
|
uint32_t dst;
|
2012-05-14 08:01:48 +00:00
|
|
|
u_char mbz;
|
|
|
|
u_char proto;
|
2015-01-06 19:03:11 +00:00
|
|
|
uint16_t len;
|
2012-05-14 08:01:48 +00:00
|
|
|
} ph;
|
|
|
|
struct cksum_vec vec[2];
|
|
|
|
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|
|
/* pseudo-header.. */
|
2015-01-06 19:03:11 +00:00
|
|
|
ph.len = htons((uint16_t)len);
|
2012-05-14 08:01:48 +00:00
|
|
|
ph.mbz = 0;
|
|
|
|
ph.proto = next_proto;
|
2015-01-06 19:03:11 +00:00
|
|
|
UNALIGNED_MEMCPY(&ph.src, &ip->ip_src.s_addr, sizeof(uint32_t));
|
2012-05-14 08:01:48 +00:00
|
|
|
if (IP_HL(ip) == 5)
|
2015-01-06 19:03:11 +00:00
|
|
|
UNALIGNED_MEMCPY(&ph.dst, &ip->ip_dst.s_addr, sizeof(uint32_t));
|
2012-05-14 08:01:48 +00:00
|
|
|
else
|
2015-01-06 19:03:11 +00:00
|
|
|
ph.dst = ip_finddst(ndo, ip);
|
2012-05-14 08:01:48 +00:00
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
vec[0].ptr = (const uint8_t *)(void *)&ph;
|
2012-05-14 08:01:48 +00:00
|
|
|
vec[0].len = sizeof(ph);
|
|
|
|
vec[1].ptr = data;
|
2015-01-06 19:03:11 +00:00
|
|
|
vec[1].len = covlen;
|
2012-05-14 08:01:48 +00:00
|
|
|
return (in_cksum(vec, 2));
|
|
|
|
}
|
|
|
|
|
2000-01-30 01:05:24 +00:00
|
|
|
static void
|
2015-01-06 19:03:11 +00:00
|
|
|
ip_printts(netdissect_options *ndo,
|
|
|
|
register const u_char *cp, u_int length)
|
2000-01-30 01:05:24 +00:00
|
|
|
{
|
2004-03-31 14:57:24 +00:00
|
|
|
register u_int ptr;
|
|
|
|
register u_int len;
|
2000-01-30 01:05:24 +00:00
|
|
|
int hoplen;
|
2004-03-31 14:57:24 +00:00
|
|
|
const char *type;
|
2000-01-30 01:05:24 +00:00
|
|
|
|
2004-03-31 14:57:24 +00:00
|
|
|
if (length < 4) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "[bad length %u]", length));
|
2004-03-31 14:57:24 +00:00
|
|
|
return;
|
|
|
|
}
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, " TS{"));
|
2000-01-30 01:05:24 +00:00
|
|
|
hoplen = ((cp[3]&0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
|
|
|
|
if ((length - 4) & (hoplen-1))
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "[bad length %u]", length));
|
2004-03-31 14:57:24 +00:00
|
|
|
ptr = cp[2] - 1;
|
|
|
|
len = 0;
|
2000-01-30 01:05:24 +00:00
|
|
|
if (ptr < 4 || ((ptr - 4) & (hoplen-1)) || ptr > length + 1)
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "[bad ptr %u]", cp[2]));
|
2000-01-30 01:05:24 +00:00
|
|
|
switch (cp[3]&0xF) {
|
|
|
|
case IPOPT_TS_TSONLY:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "TSONLY"));
|
2000-01-30 01:05:24 +00:00
|
|
|
break;
|
|
|
|
case IPOPT_TS_TSANDADDR:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "TS+ADDR"));
|
2000-01-30 01:05:24 +00:00
|
|
|
break;
|
|
|
|
/*
|
|
|
|
* prespecified should really be 3, but some ones might send 2
|
|
|
|
* instead, and the IPOPT_TS_PRESPEC constant can apparently
|
|
|
|
* have both values, so we have to hard-code it here.
|
|
|
|
*/
|
|
|
|
|
|
|
|
case 2:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "PRESPEC2.0"));
|
2000-01-30 01:05:24 +00:00
|
|
|
break;
|
|
|
|
case 3: /* IPOPT_TS_PRESPEC */
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "PRESPEC"));
|
2000-01-30 01:05:24 +00:00
|
|
|
break;
|
2004-03-31 14:57:24 +00:00
|
|
|
default:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "[bad ts type %d]", cp[3]&0xF));
|
2000-01-30 01:05:24 +00:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
type = " ";
|
|
|
|
for (len = 4; len < length; len += hoplen) {
|
|
|
|
if (ptr == len)
|
|
|
|
type = " ^ ";
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "%s%d@%s", type, EXTRACT_32BITS(&cp[len+hoplen-4]),
|
|
|
|
hoplen!=8 ? "" : ipaddr_string(ndo, &cp[len])));
|
2000-01-30 01:05:24 +00:00
|
|
|
type = " ";
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "%s", ptr == len ? " ^ " : ""));
|
2000-01-30 01:05:24 +00:00
|
|
|
|
|
|
|
if (cp[3]>>4)
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, " [%d hops not recorded]} ", cp[3]>>4));
|
2000-01-30 01:05:24 +00:00
|
|
|
else
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "}"));
|
2000-01-30 01:05:24 +00:00
|
|
|
}
|
|
|
|
|
1996-08-19 20:34:12 +00:00
|
|
|
/*
|
|
|
|
* print IP options.
|
|
|
|
*/
|
|
|
|
static void
|
2015-01-06 19:03:11 +00:00
|
|
|
ip_optprint(netdissect_options *ndo,
|
|
|
|
register const u_char *cp, u_int length)
|
1996-08-19 20:34:12 +00:00
|
|
|
{
|
2005-05-29 19:09:28 +00:00
|
|
|
register u_int option_len;
|
2007-10-16 02:31:48 +00:00
|
|
|
const char *sep = "";
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
for (; length > 0; cp += option_len, length -= option_len) {
|
|
|
|
u_int option_code;
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "%s", sep));
|
2007-10-16 02:31:48 +00:00
|
|
|
sep = ",";
|
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_TCHECK(*cp);
|
2005-05-29 19:09:28 +00:00
|
|
|
option_code = *cp;
|
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "%s",
|
|
|
|
tok2str(ip_option_values,"unknown %u",option_code)));
|
2007-10-16 02:31:48 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
if (option_code == IPOPT_NOP ||
|
|
|
|
option_code == IPOPT_EOL)
|
|
|
|
option_len = 1;
|
|
|
|
|
2001-04-03 07:50:46 +00:00
|
|
|
else {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_TCHECK(cp[1]);
|
2007-10-16 02:31:48 +00:00
|
|
|
option_len = cp[1];
|
|
|
|
if (option_len < 2) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, " [bad length %u]", option_len));
|
2007-10-16 02:31:48 +00:00
|
|
|
return;
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
|
2007-10-16 02:31:48 +00:00
|
|
|
if (option_len > length) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, " [bad length %u]", option_len));
|
2007-10-16 02:31:48 +00:00
|
|
|
return;
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_TCHECK2(*cp, option_len);
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
switch (option_code) {
|
|
|
|
case IPOPT_EOL:
|
|
|
|
return;
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPOPT_TS:
|
2015-01-06 19:03:11 +00:00
|
|
|
ip_printts(ndo, cp, option_len);
|
1996-08-19 20:34:12 +00:00
|
|
|
break;
|
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPOPT_RR: /* fall through */
|
1996-08-19 20:34:12 +00:00
|
|
|
case IPOPT_SSRR:
|
|
|
|
case IPOPT_LSRR:
|
2015-01-06 19:03:11 +00:00
|
|
|
ip_printroute(ndo, cp, option_len);
|
1996-08-19 20:34:12 +00:00
|
|
|
break;
|
|
|
|
|
1996-08-19 21:39:00 +00:00
|
|
|
case IPOPT_RA:
|
2007-10-16 02:31:48 +00:00
|
|
|
if (option_len < 4) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, " [bad length %u]", option_len));
|
2007-10-16 02:31:48 +00:00
|
|
|
break;
|
|
|
|
}
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_TCHECK(cp[3]);
|
|
|
|
if (EXTRACT_16BITS(&cp[2]) != 0)
|
|
|
|
ND_PRINT((ndo, " value %u", EXTRACT_16BITS(&cp[2])));
|
2002-06-21 00:49:02 +00:00
|
|
|
break;
|
1996-08-19 21:39:00 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPOPT_NOP: /* nothing to print - fall through */
|
|
|
|
case IPOPT_SECURITY:
|
1996-08-19 20:34:12 +00:00
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2004-03-31 14:57:24 +00:00
|
|
|
return;
|
|
|
|
|
|
|
|
trunc:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "%s", tstr));
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
|
2004-03-31 14:57:24 +00:00
|
|
|
#define IP_RES 0x8000
|
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
static const struct tok ip_frag_values[] = {
|
2004-03-31 14:57:24 +00:00
|
|
|
{ IP_MF, "+" },
|
|
|
|
{ IP_DF, "DF" },
|
|
|
|
{ IP_RES, "rsvd" }, /* The RFC3514 evil ;-) bit */
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
struct ip_print_demux_state {
|
|
|
|
const struct ip *ip;
|
|
|
|
const u_char *cp;
|
|
|
|
u_int len, off;
|
|
|
|
u_char nh;
|
|
|
|
int advance;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void
|
|
|
|
ip_print_demux(netdissect_options *ndo,
|
|
|
|
struct ip_print_demux_state *ipds)
|
|
|
|
{
|
|
|
|
struct protoent *proto;
|
2012-05-14 08:01:48 +00:00
|
|
|
struct cksum_vec vec[1];
|
2005-05-29 19:09:28 +00:00
|
|
|
|
|
|
|
again:
|
|
|
|
switch (ipds->nh) {
|
|
|
|
|
|
|
|
case IPPROTO_AH:
|
|
|
|
ipds->nh = *ipds->cp;
|
2015-01-06 19:03:11 +00:00
|
|
|
ipds->advance = ah_print(ndo, ipds->cp);
|
2005-05-29 19:09:28 +00:00
|
|
|
if (ipds->advance <= 0)
|
|
|
|
break;
|
|
|
|
ipds->cp += ipds->advance;
|
|
|
|
ipds->len -= ipds->advance;
|
|
|
|
goto again;
|
|
|
|
|
|
|
|
case IPPROTO_ESP:
|
|
|
|
{
|
|
|
|
int enh, padlen;
|
|
|
|
ipds->advance = esp_print(ndo, ipds->cp, ipds->len,
|
|
|
|
(const u_char *)ipds->ip,
|
|
|
|
&enh, &padlen);
|
|
|
|
if (ipds->advance <= 0)
|
|
|
|
break;
|
|
|
|
ipds->cp += ipds->advance;
|
|
|
|
ipds->len -= ipds->advance + padlen;
|
|
|
|
ipds->nh = enh & 0xff;
|
|
|
|
goto again;
|
|
|
|
}
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_IPCOMP:
|
|
|
|
{
|
|
|
|
int enh;
|
2015-01-06 19:03:11 +00:00
|
|
|
ipds->advance = ipcomp_print(ndo, ipds->cp, &enh);
|
2005-05-29 19:09:28 +00:00
|
|
|
if (ipds->advance <= 0)
|
|
|
|
break;
|
|
|
|
ipds->cp += ipds->advance;
|
|
|
|
ipds->len -= ipds->advance;
|
|
|
|
ipds->nh = enh & 0xff;
|
|
|
|
goto again;
|
|
|
|
}
|
|
|
|
|
|
|
|
case IPPROTO_SCTP:
|
2015-01-06 19:03:11 +00:00
|
|
|
sctp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2006-09-04 20:25:04 +00:00
|
|
|
|
|
|
|
case IPPROTO_DCCP:
|
2015-01-06 19:03:11 +00:00
|
|
|
dccp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
|
2006-09-04 20:25:04 +00:00
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_TCP:
|
2007-10-16 02:31:48 +00:00
|
|
|
/* pass on the MF bit plus the offset to detect fragments */
|
2015-01-06 19:03:11 +00:00
|
|
|
tcp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
|
2007-10-16 02:31:48 +00:00
|
|
|
ipds->off & (IP_MF|IP_OFFMASK));
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_UDP:
|
2007-10-16 02:31:48 +00:00
|
|
|
/* pass on the MF bit plus the offset to detect fragments */
|
2015-01-06 19:03:11 +00:00
|
|
|
udp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
|
2007-10-16 02:31:48 +00:00
|
|
|
ipds->off & (IP_MF|IP_OFFMASK));
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_ICMP:
|
|
|
|
/* pass on the MF bit plus the offset to detect fragments */
|
2015-01-06 19:03:11 +00:00
|
|
|
icmp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
|
2007-10-16 02:31:48 +00:00
|
|
|
ipds->off & (IP_MF|IP_OFFMASK));
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_PIGP:
|
|
|
|
/*
|
|
|
|
* XXX - the current IANA protocol number assignments
|
|
|
|
* page lists 9 as "any private interior gateway
|
|
|
|
* (used by Cisco for their IGRP)" and 88 as
|
|
|
|
* "EIGRP" from Cisco.
|
|
|
|
*
|
|
|
|
* Recent BSD <netinet/in.h> headers define
|
|
|
|
* IP_PROTO_PIGP as 9 and IP_PROTO_IGRP as 88.
|
|
|
|
* We define IP_PROTO_PIGP as 9 and
|
|
|
|
* IP_PROTO_EIGRP as 88; those names better
|
|
|
|
* match was the current protocol number
|
|
|
|
* assignments say.
|
|
|
|
*/
|
2015-01-06 19:03:11 +00:00
|
|
|
igrp_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_EIGRP:
|
2015-01-06 19:03:11 +00:00
|
|
|
eigrp_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
case IPPROTO_ND:
|
|
|
|
ND_PRINT((ndo, " nd %d", ipds->len));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_EGP:
|
2015-01-06 19:03:11 +00:00
|
|
|
egp_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_OSPF:
|
2015-01-06 19:03:11 +00:00
|
|
|
ospf_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_IGMP:
|
2015-01-06 19:03:11 +00:00
|
|
|
igmp_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_IPV4:
|
|
|
|
/* DVMRP multicast tunnel (ip-in-ip encapsulation) */
|
2012-05-14 08:01:48 +00:00
|
|
|
ip_print(ndo, ipds->cp, ipds->len);
|
2015-01-06 19:03:11 +00:00
|
|
|
if (! ndo->ndo_vflag) {
|
2005-05-29 19:09:28 +00:00
|
|
|
ND_PRINT((ndo, " (ipip-proto-4)"));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
break;
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
#ifdef INET6
|
|
|
|
case IPPROTO_IPV6:
|
|
|
|
/* ip6-in-ip encapsulation */
|
2012-05-14 08:01:48 +00:00
|
|
|
ip6_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
#endif /*INET6*/
|
|
|
|
|
|
|
|
case IPPROTO_RSVP:
|
2015-01-06 19:03:11 +00:00
|
|
|
rsvp_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_GRE:
|
|
|
|
/* do it */
|
2015-01-06 19:03:11 +00:00
|
|
|
gre_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_MOBILE:
|
2015-01-06 19:03:11 +00:00
|
|
|
mobile_print(ndo, ipds->cp, ipds->len);
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_PIM:
|
2012-05-14 08:01:48 +00:00
|
|
|
vec[0].ptr = ipds->cp;
|
|
|
|
vec[0].len = ipds->len;
|
2015-01-06 19:03:11 +00:00
|
|
|
pim_print(ndo, ipds->cp, ipds->len, in_cksum(vec, 1));
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IPPROTO_VRRP:
|
2015-01-06 19:03:11 +00:00
|
|
|
if (ndo->ndo_packettype == PT_CARP) {
|
|
|
|
if (ndo->ndo_vflag)
|
|
|
|
ND_PRINT((ndo, "carp %s > %s: ",
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_src),
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_dst)));
|
|
|
|
carp_print(ndo, ipds->cp, ipds->len, ipds->ip->ip_ttl);
|
2012-05-14 08:01:48 +00:00
|
|
|
} else {
|
2015-01-06 19:03:11 +00:00
|
|
|
if (ndo->ndo_vflag)
|
|
|
|
ND_PRINT((ndo, "vrrp %s > %s: ",
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_src),
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_dst)));
|
|
|
|
vrrp_print(ndo, ipds->cp, ipds->len,
|
|
|
|
(const u_char *)ipds->ip, ipds->ip->ip_ttl);
|
2012-05-14 08:01:48 +00:00
|
|
|
}
|
2005-05-29 19:09:28 +00:00
|
|
|
break;
|
|
|
|
|
2005-07-11 04:14:02 +00:00
|
|
|
case IPPROTO_PGM:
|
2015-01-06 19:03:11 +00:00
|
|
|
pgm_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
|
2005-07-11 04:14:02 +00:00
|
|
|
break;
|
|
|
|
|
2013-10-29 17:38:13 +00:00
|
|
|
#if defined(HAVE_NET_PFVAR_H)
|
2012-10-05 07:51:21 +00:00
|
|
|
case IPPROTO_PFSYNC:
|
|
|
|
pfsync_ip_print(ipds->cp, ipds->len);
|
|
|
|
break;
|
2013-10-29 17:38:13 +00:00
|
|
|
#endif
|
2012-10-05 07:51:21 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
default:
|
2012-10-04 22:40:22 +00:00
|
|
|
if (ndo->ndo_nflag==0 && (proto = getprotobynumber(ipds->nh)) != NULL)
|
2005-05-29 19:09:28 +00:00
|
|
|
ND_PRINT((ndo, " %s", proto->p_name));
|
|
|
|
else
|
|
|
|
ND_PRINT((ndo, " ip-proto-%d", ipds->nh));
|
|
|
|
ND_PRINT((ndo, " %d", ipds->len));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2012-10-04 22:40:22 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
void
|
|
|
|
ip_print_inner(netdissect_options *ndo,
|
|
|
|
const u_char *bp,
|
|
|
|
u_int length, u_int nh,
|
|
|
|
const u_char *bp2)
|
|
|
|
{
|
|
|
|
struct ip_print_demux_state ipd;
|
|
|
|
|
|
|
|
ipd.ip = (const struct ip *)bp2;
|
|
|
|
ipd.cp = bp;
|
|
|
|
ipd.len = length;
|
|
|
|
ipd.off = 0;
|
|
|
|
ipd.nh = nh;
|
|
|
|
ipd.advance = 0;
|
|
|
|
|
|
|
|
ip_print_demux(ndo, &ipd);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
1996-08-19 20:34:12 +00:00
|
|
|
/*
|
|
|
|
* print an IP datagram.
|
|
|
|
*/
|
|
|
|
void
|
2005-05-29 19:09:28 +00:00
|
|
|
ip_print(netdissect_options *ndo,
|
|
|
|
const u_char *bp,
|
|
|
|
u_int length)
|
1996-08-19 20:34:12 +00:00
|
|
|
{
|
2005-05-29 19:09:28 +00:00
|
|
|
struct ip_print_demux_state ipd;
|
|
|
|
struct ip_print_demux_state *ipds=&ipd;
|
2004-03-31 14:57:24 +00:00
|
|
|
const u_char *ipend;
|
2005-05-29 19:09:28 +00:00
|
|
|
u_int hlen;
|
2012-05-14 08:01:48 +00:00
|
|
|
struct cksum_vec vec[1];
|
2015-01-06 19:03:11 +00:00
|
|
|
uint16_t sum, ip_sum;
|
2005-05-29 19:09:28 +00:00
|
|
|
struct protoent *proto;
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
ipds->ip = (const struct ip *)bp;
|
2015-01-27 01:39:42 +00:00
|
|
|
ND_TCHECK(ipds->ip->ip_vhl);
|
2005-05-29 19:09:28 +00:00
|
|
|
if (IP_V(ipds->ip) != 4) { /* print version if != 4 */
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "IP%u ", IP_V(ipds->ip)));
|
2005-05-29 19:09:28 +00:00
|
|
|
if (IP_V(ipds->ip) == 6)
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ", wrong link-layer encapsulation"));
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
2015-01-06 19:03:11 +00:00
|
|
|
else if (!ndo->ndo_eflag)
|
|
|
|
ND_PRINT((ndo, "IP "));
|
2004-03-31 14:57:24 +00:00
|
|
|
|
2015-01-27 01:39:42 +00:00
|
|
|
ND_TCHECK(*ipds->ip);
|
1996-08-19 20:34:12 +00:00
|
|
|
if (length < sizeof (struct ip)) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "truncated-ip %u", length));
|
1996-08-19 20:34:12 +00:00
|
|
|
return;
|
|
|
|
}
|
2005-05-29 19:09:28 +00:00
|
|
|
hlen = IP_HL(ipds->ip) * 4;
|
2001-04-03 07:50:46 +00:00
|
|
|
if (hlen < sizeof (struct ip)) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "bad-hlen %u", hlen));
|
2001-04-03 07:50:46 +00:00
|
|
|
return;
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
ipds->len = EXTRACT_16BITS(&ipds->ip->ip_len);
|
|
|
|
if (length < ipds->len)
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "truncated-ip - %u bytes missing! ",
|
|
|
|
ipds->len - length));
|
2005-05-29 19:09:28 +00:00
|
|
|
if (ipds->len < hlen) {
|
|
|
|
#ifdef GUESS_TSO
|
|
|
|
if (ipds->len) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "bad-len %u", ipds->len));
|
2005-05-29 19:09:28 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* we guess that it is a TSO send */
|
|
|
|
ipds->len = length;
|
|
|
|
}
|
|
|
|
#else
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "bad-len %u", ipds->len));
|
2005-05-29 19:09:28 +00:00
|
|
|
return;
|
|
|
|
#endif /* GUESS_TSO */
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Cut off the snapshot length to the end of the IP payload.
|
|
|
|
*/
|
2005-05-29 19:09:28 +00:00
|
|
|
ipend = bp + ipds->len;
|
2012-05-14 08:01:48 +00:00
|
|
|
if (ipend < ndo->ndo_snapend)
|
|
|
|
ndo->ndo_snapend = ipend;
|
2004-03-31 14:57:24 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
ipds->len -= hlen;
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
ipds->off = EXTRACT_16BITS(&ipds->ip->ip_off);
|
2004-03-31 14:57:24 +00:00
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
if (ndo->ndo_vflag) {
|
|
|
|
ND_PRINT((ndo, "(tos 0x%x", (int)ipds->ip->ip_tos));
|
2004-03-31 14:57:24 +00:00
|
|
|
/* ECN bits */
|
2005-05-29 19:09:28 +00:00
|
|
|
if (ipds->ip->ip_tos & 0x03) {
|
|
|
|
switch (ipds->ip->ip_tos & 0x03) {
|
2004-03-31 14:57:24 +00:00
|
|
|
case 1:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ",ECT(1)"));
|
2004-03-31 14:57:24 +00:00
|
|
|
break;
|
|
|
|
case 2:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ",ECT(0)"));
|
2004-03-31 14:57:24 +00:00
|
|
|
break;
|
|
|
|
case 3:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ",CE"));
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
if (ipds->ip->ip_ttl >= 1)
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ", ttl %u", ipds->ip->ip_ttl));
|
2004-03-31 14:57:24 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* for the firewall guys, print id, offset.
|
|
|
|
* On all but the last stick a "+" in the flags portion.
|
|
|
|
* For unfragmented datagrams, note the don't fragment flag.
|
|
|
|
*/
|
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ", id %u, offset %u, flags [%s], proto %s (%u)",
|
2005-05-29 19:09:28 +00:00
|
|
|
EXTRACT_16BITS(&ipds->ip->ip_id),
|
|
|
|
(ipds->off & 0x1fff) * 8,
|
2007-10-16 02:31:48 +00:00
|
|
|
bittok2str(ip_frag_values, "none", ipds->off&0xe000),
|
2005-05-29 19:09:28 +00:00
|
|
|
tok2str(ipproto_values,"unknown",ipds->ip->ip_p),
|
2015-01-06 19:03:11 +00:00
|
|
|
ipds->ip->ip_p));
|
2004-03-31 14:57:24 +00:00
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ", length %u", EXTRACT_16BITS(&ipds->ip->ip_len)));
|
2004-03-31 14:57:24 +00:00
|
|
|
|
|
|
|
if ((hlen - sizeof(struct ip)) > 0) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ", options ("));
|
|
|
|
ip_optprint(ndo, (u_char *)(ipds->ip + 1), hlen - sizeof(struct ip));
|
|
|
|
ND_PRINT((ndo, ")"));
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
if (!ndo->ndo_Kflag && (u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
|
|
|
|
vec[0].ptr = (const uint8_t *)(void *)ipds->ip;
|
2012-05-14 08:01:48 +00:00
|
|
|
vec[0].len = hlen;
|
|
|
|
sum = in_cksum(vec, 1);
|
2004-03-31 14:57:24 +00:00
|
|
|
if (sum != 0) {
|
2005-05-29 19:09:28 +00:00
|
|
|
ip_sum = EXTRACT_16BITS(&ipds->ip->ip_sum);
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ", bad cksum %x (->%x)!", ip_sum,
|
|
|
|
in_cksum_shouldbe(ip_sum, sum)));
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, ")\n "));
|
2004-03-31 14:57:24 +00:00
|
|
|
}
|
|
|
|
|
1996-08-19 20:34:12 +00:00
|
|
|
/*
|
|
|
|
* If this is fragment zero, hand it to the next higher
|
|
|
|
* level protocol.
|
|
|
|
*/
|
2005-05-29 19:09:28 +00:00
|
|
|
if ((ipds->off & 0x1fff) == 0) {
|
|
|
|
ipds->cp = (const u_char *)ipds->ip + hlen;
|
|
|
|
ipds->nh = ipds->ip->ip_p;
|
|
|
|
|
|
|
|
if (ipds->nh != IPPROTO_TCP && ipds->nh != IPPROTO_UDP &&
|
2006-09-04 20:25:04 +00:00
|
|
|
ipds->nh != IPPROTO_SCTP && ipds->nh != IPPROTO_DCCP) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "%s > %s: ",
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_src),
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_dst)));
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
2005-05-29 19:09:28 +00:00
|
|
|
ip_print_demux(ndo, ipds);
|
2004-03-31 14:57:24 +00:00
|
|
|
} else {
|
|
|
|
/* Ultra quiet now means that all this stuff should be suppressed */
|
2015-01-06 19:03:11 +00:00
|
|
|
if (ndo->ndo_qflag > 1) return;
|
2004-03-31 14:57:24 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* if this isn't the first frag, we're missing the
|
|
|
|
* next level protocol header. print the ip addr
|
|
|
|
* and the protocol.
|
|
|
|
*/
|
2015-01-06 19:03:11 +00:00
|
|
|
if (ipds->off & 0x1fff) {
|
|
|
|
ND_PRINT((ndo, "%s > %s:", ipaddr_string(ndo, &ipds->ip->ip_src),
|
|
|
|
ipaddr_string(ndo, &ipds->ip->ip_dst)));
|
|
|
|
if (!ndo->ndo_nflag && (proto = getprotobynumber(ipds->ip->ip_p)) != NULL)
|
|
|
|
ND_PRINT((ndo, " %s", proto->p_name));
|
|
|
|
else
|
|
|
|
ND_PRINT((ndo, " ip-proto-%d", ipds->ip->ip_p));
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
2015-01-27 01:39:42 +00:00
|
|
|
return;
|
|
|
|
|
|
|
|
trunc:
|
|
|
|
ND_PRINT((ndo, "%s", tstr));
|
|
|
|
return;
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
2001-04-03 07:50:46 +00:00
|
|
|
|
|
|
|
void
|
2015-01-06 19:03:11 +00:00
|
|
|
ipN_print(netdissect_options *ndo, register const u_char *bp, register u_int length)
|
2001-04-03 07:50:46 +00:00
|
|
|
{
|
2015-01-06 19:03:11 +00:00
|
|
|
struct ip hdr;
|
2001-04-03 07:50:46 +00:00
|
|
|
|
|
|
|
if (length < 4) {
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "truncated-ip %d", length));
|
2001-04-03 07:50:46 +00:00
|
|
|
return;
|
|
|
|
}
|
2015-01-06 19:03:11 +00:00
|
|
|
memcpy (&hdr, bp, 4);
|
2001-04-03 07:50:46 +00:00
|
|
|
switch (IP_V(&hdr)) {
|
|
|
|
case 4:
|
2015-01-06 19:03:11 +00:00
|
|
|
ip_print (ndo, bp, length);
|
2002-06-21 00:49:02 +00:00
|
|
|
return;
|
2001-04-03 07:50:46 +00:00
|
|
|
#ifdef INET6
|
|
|
|
case 6:
|
2015-01-06 19:03:11 +00:00
|
|
|
ip6_print (ndo, bp, length);
|
2002-06-21 00:49:02 +00:00
|
|
|
return;
|
2001-04-03 07:50:46 +00:00
|
|
|
#endif
|
|
|
|
default:
|
2015-01-06 19:03:11 +00:00
|
|
|
ND_PRINT((ndo, "unknown ip %d", IP_V(&hdr)));
|
2002-06-21 00:49:02 +00:00
|
|
|
return;
|
2001-04-03 07:50:46 +00:00
|
|
|
}
|
|
|
|
}
|
2004-03-31 14:57:24 +00:00
|
|
|
|
2005-05-29 19:09:28 +00:00
|
|
|
/*
|
|
|
|
* Local Variables:
|
|
|
|
* c-style: whitesmith
|
|
|
|
* c-basic-offset: 8
|
|
|
|
* End:
|
|
|
|
*/
|
2004-03-31 14:57:24 +00:00
|
|
|
|
|
|
|
|