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.
25 static const char rcsid[] _U_ =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-sl.c,v 1.65 2005-04-06 21:32:42 mcr Exp $ (LBL)";
33 #include <tcpdump-stdinc.h>
38 #include "interface.h"
39 #include "addrtoname.h"
40 #include "extract.h" /* must come after interface.h */
45 #include "slcompress.h"
47 static u_int lastlen[2][256];
48 static u_int lastconn = 255;
50 static void sliplink_print(const u_char *, const struct ip *, u_int);
51 static void compressed_sl_print(const u_char *, const struct ip *, u_int, int);
54 sl_if_print(const struct pcap_pkthdr *h, const u_char *p)
56 register u_int caplen = h->caplen;
57 register u_int length = h->len;
58 register const struct ip *ip;
60 if (caplen < SLIP_HDRLEN) {
65 length -= SLIP_HDRLEN;
67 ip = (struct ip *)(p + SLIP_HDRLEN);
70 sliplink_print(p, ip, length);
74 ip_print(gndo, (u_char *)ip, length);
78 ip6_print(gndo, (u_char *)ip, length);
82 printf ("ip v%d", IP_V(ip));
89 sl_bsdos_if_print(const struct pcap_pkthdr *h, const u_char *p)
91 register u_int caplen = h->caplen;
92 register u_int length = h->len;
93 register const struct ip *ip;
95 if (caplen < SLIP_HDRLEN) {
100 length -= SLIP_HDRLEN;
102 ip = (struct ip *)(p + SLIP_HDRLEN);
106 sliplink_print(p, ip, length);
109 ip_print(gndo, (u_char *)ip, length);
111 return (SLIP_HDRLEN);
115 sliplink_print(register const u_char *p, register const struct ip *ip,
116 register u_int length)
122 putchar(dir == SLIPDIR_IN ? 'I' : 'O');
126 /* XXX just dump the header */
129 for (i = SLX_CHDR; i < SLX_CHDR + CHDR_LEN - 1; ++i)
130 printf("%02x.", p[i]);
131 printf("%02x: ", p[SLX_CHDR + CHDR_LEN - 1]);
134 switch (p[SLX_CHDR] & 0xf0) {
137 printf("ip %d: ", length + SLIP_HDRLEN);
140 case TYPE_UNCOMPRESSED_TCP:
142 * The connection id is stored in the IP protocol field.
143 * Get it from the link layer since sl_uncompress_tcp()
144 * has restored the IP header copy to IPPROTO_TCP.
146 lastconn = ((struct ip *)&p[SLX_CHDR])->ip_p;
148 hlen += TH_OFF((struct tcphdr *)&((int *)ip)[hlen]);
149 lastlen[dir][lastconn] = length - (hlen << 2);
150 printf("utcp %d: ", lastconn);
154 if (p[SLX_CHDR] & TYPE_COMPRESSED_TCP) {
155 compressed_sl_print(&p[SLX_CHDR], ip,
159 printf("slip-%d!: ", p[SLX_CHDR]);
163 static const u_char *
164 print_sl_change(const char *str, register const u_char *cp)
168 if ((i = *cp++) == 0) {
169 i = EXTRACT_16BITS(cp);
172 printf(" %s%d", str, i);
176 static const u_char *
177 print_sl_winchange(register const u_char *cp)
181 if ((i = *cp++) == 0) {
182 i = EXTRACT_16BITS(cp);
193 compressed_sl_print(const u_char *chdr, const struct ip *ip,
194 u_int length, int dir)
196 register const u_char *cp = chdr;
197 register u_int flags, hlen;
202 printf("ctcp %d", lastconn);
206 /* skip tcp checksum */
209 switch (flags & SPECIALS_MASK) {
211 printf(" *SA+%d", lastlen[dir][lastconn]);
215 printf(" *S+%d", lastlen[dir][lastconn]);
220 cp = print_sl_change("U=", cp);
222 cp = print_sl_winchange(cp);
224 cp = print_sl_change("A+", cp);
226 cp = print_sl_change("S+", cp);
230 cp = print_sl_change("I+", cp);
233 * 'hlen' is the length of the uncompressed TCP/IP header (in words).
234 * 'cp - chdr' is the length of the compressed header.
235 * 'length - hlen' is the amount of data in the packet.
238 hlen += TH_OFF((struct tcphdr *)&((int32_t *)ip)[hlen]);
239 lastlen[dir][lastconn] = length - (hlen << 2);
240 printf(" %d (%ld)", lastlen[dir][lastconn], (long)(cp - chdr));