mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-24 02:23:27 +08:00
f685a42c3d
the top-level directory, remove from them all stuff not needed by tcpdump, include them rather than the system's header files, and get rid of assorted unnecessary include files. This means you don't need to check for "slip.h" when building "print-sl.c", stubbing it out on systems that don't have "slip.h". We also don't need to build the stuff in "print-vjc.c" only on BSD/OS. Use "u_int32_t" and "u_int16_t" rather than "u_int" and "u_short" for structure members in "print-chdlc.c". Move PPP_HDRLEN from "print-ppp.c" to "ppp.h", as per the XXX comment in "print-ppp.c".
270 lines
6.2 KiB
C
270 lines
6.2 KiB
C
/*
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* Copyright (c) 1989, 1990, 1991, 1993, 1994, 1995, 1996, 1997
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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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*/
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-sl.c,v 1.55 2000-10-09 01:53:20 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <pcap.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h" /* must come after interface.h */
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#include "ip.h"
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#include "tcp.h"
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#include "slip.h"
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#include "slcompress.h"
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static u_int lastlen[2][256];
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static u_int lastconn = 255;
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static void sliplink_print(const u_char *, const struct ip *, u_int);
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static void compressed_sl_print(const u_char *, const struct ip *, u_int, int);
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void
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sl_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
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{
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register u_int caplen = h->caplen;
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register u_int length = h->len;
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register const struct ip *ip;
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ts_print(&h->ts);
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if (caplen < SLIP_HDRLEN) {
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printf("[|slip]");
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goto out;
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}
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/*
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* Some printers want to get back at the link level addresses,
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* and/or check that they're not walking off the end of the packet.
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* Rather than pass them all the way down, we set these globals.
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*/
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packetp = p;
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snapend = p + caplen;
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length -= SLIP_HDRLEN;
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ip = (struct ip *)(p + SLIP_HDRLEN);
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if (eflag)
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sliplink_print(p, ip, length);
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switch (IP_V(ip)) {
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case 4:
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ip_print((u_char *)ip, length);
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break;
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#ifdef INET6
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case 6:
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ip6_print((u_char *)ip, length);
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break;
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#endif
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default:
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printf ("ip v%d", IP_V(ip));
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}
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if (xflag)
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default_print((u_char *)ip, caplen - SLIP_HDRLEN);
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out:
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putchar('\n');
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}
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void
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sl_bsdos_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
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{
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register u_int caplen = h->caplen;
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register u_int length = h->len;
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register const struct ip *ip;
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ts_print(&h->ts);
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if (caplen < SLIP_HDRLEN) {
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printf("[|slip]");
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goto out;
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}
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/*
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* Some printers want to get back at the link level addresses,
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* and/or check that they're not walking off the end of the packet.
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* Rather than pass them all the way down, we set these globals.
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*/
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packetp = p;
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snapend = p + caplen;
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length -= SLIP_HDRLEN;
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ip = (struct ip *)(p + SLIP_HDRLEN);
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#ifdef notdef
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if (eflag)
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sliplink_print(p, ip, length);
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#endif
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ip_print((u_char *)ip, length);
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if (xflag)
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default_print((u_char *)ip, caplen - SLIP_HDRLEN);
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out:
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putchar('\n');
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}
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static void
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sliplink_print(register const u_char *p, register const struct ip *ip,
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register u_int length)
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{
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int dir;
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u_int hlen;
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dir = p[SLX_DIR];
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putchar(dir == SLIPDIR_IN ? 'I' : 'O');
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putchar(' ');
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if (nflag) {
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/* XXX just dump the header */
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register int i;
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for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
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printf("%02x.", p[i]);
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printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
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return;
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}
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switch (p[SLX_CHDR] & 0xf0) {
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case TYPE_IP:
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printf("ip %d: ", length + SLIP_HDRLEN);
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break;
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case TYPE_UNCOMPRESSED_TCP:
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/*
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* The connection id is stored in the IP protocol field.
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* Get it from the link layer since sl_uncompress_tcp()
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* has restored the IP header copy to IPPROTO_TCP.
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*/
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lastconn = ((struct ip *)&p[SLX_CHDR])->ip_p;
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hlen = IP_HL(ip);
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hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
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lastlen[dir][lastconn] = length - (hlen << 2);
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printf("utcp %d: ", lastconn);
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break;
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default:
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if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
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compressed_sl_print(&p[SLX_CHDR], ip,
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length, dir);
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printf(": ");
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} else
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printf("slip-%d!: ", p[SLX_CHDR]);
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}
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}
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static const u_char *
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print_sl_change(const char *str, register const u_char *cp)
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{
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register u_int i;
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if ((i = *cp++) == 0) {
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i = EXTRACT_16BITS(cp);
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cp += 2;
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}
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printf(" %s%d", str, i);
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return (cp);
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}
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static const u_char *
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print_sl_winchange(register const u_char *cp)
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{
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register short i;
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if ((i = *cp++) == 0) {
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i = EXTRACT_16BITS(cp);
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cp += 2;
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}
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if (i >= 0)
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printf(" W+%d", i);
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else
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printf(" W%d", i);
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return (cp);
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}
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static void
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compressed_sl_print(const u_char *chdr, const struct ip *ip,
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u_int length, int dir)
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{
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register const u_char *cp = chdr;
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register u_int flags, hlen;
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flags = *cp++;
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if (flags & NEW_C) {
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lastconn = *cp++;
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printf("ctcp %d", lastconn);
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} else
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printf("ctcp *");
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/* skip tcp checksum */
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cp += 2;
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switch (flags & SPECIALS_MASK) {
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case SPECIAL_I:
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printf(" *SA+%d", lastlen[dir][lastconn]);
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break;
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case SPECIAL_D:
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printf(" *S+%d", lastlen[dir][lastconn]);
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break;
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default:
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if (flags & NEW_U)
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cp = print_sl_change("U=", cp);
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if (flags & NEW_W)
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cp = print_sl_winchange(cp);
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if (flags & NEW_A)
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cp = print_sl_change("A+", cp);
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if (flags & NEW_S)
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cp = print_sl_change("S+", cp);
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break;
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}
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if (flags & NEW_I)
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cp = print_sl_change("I+", cp);
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/*
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* 'hlen' is the length of the uncompressed TCP/IP header (in words).
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* 'cp - chdr' is the length of the compressed header.
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* 'length - hlen' is the amount of data in the packet.
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*/
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hlen = IP_HL(ip);
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hlen += TH_OFF((struct tcphdr *)&((int32_t *)ip)[hlen]);
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lastlen[dir][lastconn] = length - (hlen << 2);
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printf(" %d (%d)", lastlen[dir][lastconn], cp - chdr);
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}
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