280 lines
6.4 KiB
C
280 lines
6.4 KiB
C
/*
|
|
* Copyright (c) 1989, 1990, 1991, 1993, 1994, 1995, 1996, 1997
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-sl.c,v 1.57 2001/07/05 18:54:17 guy Exp $ (LBL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <ctype.h>
|
|
#include <netdb.h>
|
|
#include <pcap.h>
|
|
#include <stdio.h>
|
|
|
|
#include "interface.h"
|
|
#include "addrtoname.h"
|
|
#include "extract.h" /* must come after interface.h */
|
|
|
|
#include "ip.h"
|
|
#include "tcp.h"
|
|
#include "slip.h"
|
|
#include "slcompress.h"
|
|
|
|
static u_int lastlen[2][256];
|
|
static u_int lastconn = 255;
|
|
|
|
static void sliplink_print(const u_char *, const struct ip *, u_int);
|
|
static void compressed_sl_print(const u_char *, const struct ip *, u_int, int);
|
|
|
|
void
|
|
sl_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
|
|
{
|
|
register u_int caplen = h->caplen;
|
|
register u_int length = h->len;
|
|
register const struct ip *ip;
|
|
|
|
++infodelay;
|
|
ts_print(&h->ts);
|
|
|
|
if (caplen < SLIP_HDRLEN) {
|
|
printf("[|slip]");
|
|
goto out;
|
|
}
|
|
/*
|
|
* Some printers want to get back at the link level addresses,
|
|
* and/or check that they're not walking off the end of the packet.
|
|
* Rather than pass them all the way down, we set these globals.
|
|
*/
|
|
packetp = p;
|
|
snapend = p + caplen;
|
|
|
|
length -= SLIP_HDRLEN;
|
|
|
|
ip = (struct ip *)(p + SLIP_HDRLEN);
|
|
|
|
if (eflag)
|
|
sliplink_print(p, ip, length);
|
|
|
|
switch (IP_V(ip)) {
|
|
case 4:
|
|
ip_print((u_char *)ip, length);
|
|
break;
|
|
#ifdef INET6
|
|
case 6:
|
|
ip6_print((u_char *)ip, length);
|
|
break;
|
|
#endif
|
|
default:
|
|
printf ("ip v%d", IP_V(ip));
|
|
}
|
|
|
|
if (xflag)
|
|
default_print((u_char *)ip, caplen - SLIP_HDRLEN);
|
|
out:
|
|
putchar('\n');
|
|
--infodelay;
|
|
if (infoprint)
|
|
info(0);
|
|
}
|
|
|
|
|
|
void
|
|
sl_bsdos_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
|
|
{
|
|
register u_int caplen = h->caplen;
|
|
register u_int length = h->len;
|
|
register const struct ip *ip;
|
|
|
|
++infodelay;
|
|
ts_print(&h->ts);
|
|
|
|
if (caplen < SLIP_HDRLEN) {
|
|
printf("[|slip]");
|
|
goto out;
|
|
}
|
|
/*
|
|
* Some printers want to get back at the link level addresses,
|
|
* and/or check that they're not walking off the end of the packet.
|
|
* Rather than pass them all the way down, we set these globals.
|
|
*/
|
|
packetp = p;
|
|
snapend = p + caplen;
|
|
|
|
length -= SLIP_HDRLEN;
|
|
|
|
ip = (struct ip *)(p + SLIP_HDRLEN);
|
|
|
|
#ifdef notdef
|
|
if (eflag)
|
|
sliplink_print(p, ip, length);
|
|
#endif
|
|
|
|
ip_print((u_char *)ip, length);
|
|
|
|
if (xflag)
|
|
default_print((u_char *)ip, caplen - SLIP_HDRLEN);
|
|
out:
|
|
putchar('\n');
|
|
--infodelay;
|
|
if (infoprint)
|
|
info(0);
|
|
}
|
|
|
|
static void
|
|
sliplink_print(register const u_char *p, register const struct ip *ip,
|
|
register u_int length)
|
|
{
|
|
int dir;
|
|
u_int hlen;
|
|
|
|
dir = p[SLX_DIR];
|
|
putchar(dir == SLIPDIR_IN ? 'I' : 'O');
|
|
putchar(' ');
|
|
|
|
if (nflag) {
|
|
/* XXX just dump the header */
|
|
register int i;
|
|
|
|
for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
|
|
printf("%02x.", p[i]);
|
|
printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
|
|
return;
|
|
}
|
|
switch (p[SLX_CHDR] & 0xf0) {
|
|
|
|
case TYPE_IP:
|
|
printf("ip %d: ", length + SLIP_HDRLEN);
|
|
break;
|
|
|
|
case TYPE_UNCOMPRESSED_TCP:
|
|
/*
|
|
* The connection id is stored in the IP protocol field.
|
|
* Get it from the link layer since sl_uncompress_tcp()
|
|
* has restored the IP header copy to IPPROTO_TCP.
|
|
*/
|
|
lastconn = ((struct ip *)&p[SLX_CHDR])->ip_p;
|
|
hlen = IP_HL(ip);
|
|
hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
|
|
lastlen[dir][lastconn] = length - (hlen << 2);
|
|
printf("utcp %d: ", lastconn);
|
|
break;
|
|
|
|
default:
|
|
if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
|
|
compressed_sl_print(&p[SLX_CHDR], ip,
|
|
length, dir);
|
|
printf(": ");
|
|
} else
|
|
printf("slip-%d!: ", p[SLX_CHDR]);
|
|
}
|
|
}
|
|
|
|
static const u_char *
|
|
print_sl_change(const char *str, register const u_char *cp)
|
|
{
|
|
register u_int i;
|
|
|
|
if ((i = *cp++) == 0) {
|
|
i = EXTRACT_16BITS(cp);
|
|
cp += 2;
|
|
}
|
|
printf(" %s%d", str, i);
|
|
return (cp);
|
|
}
|
|
|
|
static const u_char *
|
|
print_sl_winchange(register const u_char *cp)
|
|
{
|
|
register short i;
|
|
|
|
if ((i = *cp++) == 0) {
|
|
i = EXTRACT_16BITS(cp);
|
|
cp += 2;
|
|
}
|
|
if (i >= 0)
|
|
printf(" W+%d", i);
|
|
else
|
|
printf(" W%d", i);
|
|
return (cp);
|
|
}
|
|
|
|
static void
|
|
compressed_sl_print(const u_char *chdr, const struct ip *ip,
|
|
u_int length, int dir)
|
|
{
|
|
register const u_char *cp = chdr;
|
|
register u_int flags, hlen;
|
|
|
|
flags = *cp++;
|
|
if (flags & NEW_C) {
|
|
lastconn = *cp++;
|
|
printf("ctcp %d", lastconn);
|
|
} else
|
|
printf("ctcp *");
|
|
|
|
/* skip tcp checksum */
|
|
cp += 2;
|
|
|
|
switch (flags & SPECIALS_MASK) {
|
|
case SPECIAL_I:
|
|
printf(" *SA+%d", lastlen[dir][lastconn]);
|
|
break;
|
|
|
|
case SPECIAL_D:
|
|
printf(" *S+%d", lastlen[dir][lastconn]);
|
|
break;
|
|
|
|
default:
|
|
if (flags & NEW_U)
|
|
cp = print_sl_change("U=", cp);
|
|
if (flags & NEW_W)
|
|
cp = print_sl_winchange(cp);
|
|
if (flags & NEW_A)
|
|
cp = print_sl_change("A+", cp);
|
|
if (flags & NEW_S)
|
|
cp = print_sl_change("S+", cp);
|
|
break;
|
|
}
|
|
if (flags & NEW_I)
|
|
cp = print_sl_change("I+", cp);
|
|
|
|
/*
|
|
* 'hlen' is the length of the uncompressed TCP/IP header (in words).
|
|
* 'cp - chdr' is the length of the compressed header.
|
|
* 'length - hlen' is the amount of data in the packet.
|
|
*/
|
|
hlen = IP_HL(ip);
|
|
hlen += TH_OFF((struct tcphdr *)&((int32_t *)ip)[hlen]);
|
|
lastlen[dir][lastconn] = length - (hlen << 2);
|
|
printf(" %d (%ld)", lastlen[dir][lastconn], (long)(cp - chdr));
|
|
}
|