2 * Copyright (c) 1989, 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-sl.c,v 1.65 2005-04-06 21:32:42 mcr Exp $ (LBL)";
31 #include <tcpdump-stdinc.h>
36 #include "interface.h"
37 #include "addrtoname.h"
38 #include "extract.h" /* must come after interface.h */
43 #include "slcompress.h"
45 static u_int lastlen[2][256];
46 static u_int lastconn = 255;
48 static void sliplink_print(const u_char *, const struct ip *, u_int);
49 static void compressed_sl_print(const u_char *, const struct ip *, u_int, int);
52 sl_if_print(const struct pcap_pkthdr *h, const u_char *p)
54 register u_int caplen = h->caplen;
55 register u_int length = h->len;
56 register const struct ip *ip;
58 if (caplen < SLIP_HDRLEN) {
63 length -= SLIP_HDRLEN;
65 ip = (struct ip *)(p + SLIP_HDRLEN);
68 sliplink_print(p, ip, length);
72 ip_print(gndo, (u_char *)ip, length);
76 ip6_print(gndo, (u_char *)ip, length);
80 printf ("ip v%d", IP_V(ip));
87 sl_bsdos_if_print(const struct pcap_pkthdr *h, const u_char *p)
89 register u_int caplen = h->caplen;
90 register u_int length = h->len;
91 register const struct ip *ip;
93 if (caplen < SLIP_HDRLEN) {
98 length -= SLIP_HDRLEN;
100 ip = (struct ip *)(p + SLIP_HDRLEN);
104 sliplink_print(p, ip, length);
107 ip_print(gndo, (u_char *)ip, length);
109 return (SLIP_HDRLEN);
113 sliplink_print(register const u_char *p, register const struct ip *ip,
114 register u_int length)
120 putchar(dir == SLIPDIR_IN ? 'I' : 'O');
124 /* XXX just dump the header */
127 for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
128 printf("%02x.", p[i]);
129 printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
132 switch (p[SLX_CHDR] & 0xf0) {
135 printf("ip %d: ", length + SLIP_HDRLEN);
138 case TYPE_UNCOMPRESSED_TCP:
140 * The connection id is stored in the IP protocol field.
141 * Get it from the link layer since sl_uncompress_tcp()
142 * has restored the IP header copy to IPPROTO_TCP.
144 lastconn = ((struct ip *)&p[SLX_CHDR])->ip_p;
146 hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
147 lastlen[dir][lastconn] = length - (hlen << 2);
148 printf("utcp %d: ", lastconn);
152 if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
153 compressed_sl_print(&p[SLX_CHDR], ip,
157 printf("slip-%d!: ", p[SLX_CHDR]);
161 static const u_char *
162 print_sl_change(const char *str, register const u_char *cp)
166 if ((i = *cp++) == 0) {
167 i = EXTRACT_16BITS(cp);
170 printf(" %s%d", str, i);
174 static const u_char *
175 print_sl_winchange(register const u_char *cp)
179 if ((i = *cp++) == 0) {
180 i = EXTRACT_16BITS(cp);
191 compressed_sl_print(const u_char *chdr, const struct ip *ip,
192 u_int length, int dir)
194 register const u_char *cp = chdr;
195 register u_int flags, hlen;
200 printf("ctcp %d", lastconn);
204 /* skip tcp checksum */
207 switch (flags & SPECIALS_MASK) {
209 printf(" *SA+%d", lastlen[dir][lastconn]);
213 printf(" *S+%d", lastlen[dir][lastconn]);
218 cp = print_sl_change("U=", cp);
220 cp = print_sl_winchange(cp);
222 cp = print_sl_change("A+", cp);
224 cp = print_sl_change("S+", cp);
228 cp = print_sl_change("I+", cp);
231 * 'hlen' is the length of the uncompressed TCP/IP header (in words).
232 * 'cp - chdr' is the length of the compressed header.
233 * 'length - hlen' is the amount of data in the packet.
236 hlen += TH_OFF((struct tcphdr *)&((int32_t *)ip)[hlen]);
237 lastlen[dir][lastconn] = length - (hlen << 2);
238 printf(" %d (%ld)", lastlen[dir][lastconn], (long)(cp - chdr));