2 * Copyright (c) 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-chdlc.c,v 1.32.2.11 2005/11/29 08:57:10 hannes Exp $ (LBL)";
31 #include <tcpdump-stdinc.h>
36 #include "interface.h"
37 #include "addrtoname.h"
38 #include "ethertype.h"
43 static void chdlc_slarp_print(const u_char *, u_int);
45 const struct tok chdlc_cast_values[] = {
46 { CHDLC_UNICAST, "unicast" },
47 { CHDLC_BCAST, "bcast" },
52 /* Standard CHDLC printer */
54 chdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
56 register u_int length = h->len;
57 register u_int caplen = h->caplen;
59 if (caplen < CHDLC_HDRLEN) {
63 return (chdlc_print(p,length));
67 chdlc_print(register const u_char *p, u_int length) {
70 proto = EXTRACT_16BITS(&p[2]);
72 printf("%s, ethertype %s (0x%04x), length %u: ",
73 tok2str(chdlc_cast_values, "0x%02x", p[0]),
74 tok2str(ethertype_values, "Unknown", proto),
79 length -= CHDLC_HDRLEN;
84 ip_print(gndo, p, length);
91 case CHDLC_TYPE_SLARP:
92 chdlc_slarp_print(p, length);
96 chdlc_cdp_print(p, length);
100 case ETHERTYPE_MPLS_MULTI:
101 mpls_print(p, length);
104 /* is the fudge byte set ? lets verify by spotting ISO headers */
105 if (*(p+1) == 0x81 ||
108 isoclns_print(p+1, length-1, length-1);
110 isoclns_print(p, length, length);
114 printf("unknown CHDLC protocol (0x%04x)", proto);
118 return (CHDLC_HDRLEN);
122 * The fixed-length portion of a SLARP packet.
126 #define SLARP_REQUEST 0
127 #define SLARP_REPLY 1
128 #define SLARP_KEEPALIVE 2
142 #define SLARP_MIN_LEN 14
143 #define SLARP_MAX_LEN 18
146 chdlc_slarp_print(const u_char *cp, u_int length)
148 const struct cisco_slarp *slarp;
149 u_int sec,min,hrs,days;
151 printf("SLARP (length: %u), ",length);
152 if (length < SLARP_MIN_LEN)
155 slarp = (const struct cisco_slarp *)cp;
156 TCHECK2(*slarp, SLARP_MIN_LEN);
157 switch (EXTRACT_32BITS(&slarp->code)) {
161 * At least according to William "Chops" Westfield's
164 * http://www.nethelp.no/net/cisco-hdlc.txt
166 * the address and mask aren't used in requests -
171 printf("reply %s/%s",
172 ipaddr_string(&slarp->un.addr.addr),
173 ipaddr_string(&slarp->un.addr.mask));
175 case SLARP_KEEPALIVE:
176 printf("keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x",
177 EXTRACT_32BITS(&slarp->un.keep.myseq),
178 EXTRACT_32BITS(&slarp->un.keep.yourseq),
179 EXTRACT_16BITS(&slarp->un.keep.rel));
181 if (length >= SLARP_MAX_LEN) { /* uptime-stamp is optional */
185 sec = EXTRACT_32BITS(cp) / 1000;
186 min = sec / 60; sec -= min * 60;
187 hrs = min / 60; min -= hrs * 60;
188 days = hrs / 24; hrs -= days * 24;
189 printf(", link uptime=%ud%uh%um%us",days,hrs,min,sec);
193 printf("0x%02x unknown", EXTRACT_32BITS(&slarp->code));
195 print_unknown_data(cp+4,"\n\t",length-4);
199 if (SLARP_MAX_LEN < length && vflag)
200 printf(", (trailing junk: %d bytes)", length - SLARP_MAX_LEN);
202 print_unknown_data(cp+4,"\n\t",length-4);
212 * c-style: whitesmith