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 1.32.2.8 2005/08/23 10:29:42 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 /* Standard CHDLC printer */
47 chdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
49 register u_int length = h->len;
50 register u_int caplen = h->caplen;
52 if (caplen < CHDLC_HDRLEN) {
56 return (chdlc_print(p,length));
60 chdlc_print(register const u_char *p, u_int length) {
64 proto = EXTRACT_16BITS(&p[2]);
74 printf("0x%02x ", p[0]);
77 printf("%d %04x: ", length, proto);
80 length -= CHDLC_HDRLEN;
81 ip = (const struct ip *)(p + CHDLC_HDRLEN);
84 ip_print(gndo, (const u_char *)ip, length);
88 ip6_print((const u_char *)ip, length);
91 case CHDLC_TYPE_SLARP:
92 chdlc_slarp_print((const u_char *)ip, length);
96 chdlc_cdp_print((const u_char *)ip, length);
100 case ETHERTYPE_MPLS_MULTI:
101 mpls_print((const u_char *)(ip), length);
104 /* is the fudge byte set ? lets verify by spotting ISO headers */
105 if (*(p+CHDLC_HDRLEN+1) == 0x81 ||
106 *(p+CHDLC_HDRLEN+1) == 0x82 ||
107 *(p+CHDLC_HDRLEN+1) == 0x83)
108 isoclns_print(p+CHDLC_HDRLEN+1, length-1, length-1);
110 isoclns_print(p+CHDLC_HDRLEN, length, length);
113 printf("unknown CHDLC protocol (0x%04x)", proto);
117 return (CHDLC_HDRLEN);
121 * The fixed-length portion of a SLARP packet.
125 #define SLARP_REQUEST 0
126 #define SLARP_REPLY 1
127 #define SLARP_KEEPALIVE 2
141 #define SLARP_MIN_LEN 14
142 #define SLARP_MAX_LEN 18
145 chdlc_slarp_print(const u_char *cp, u_int length)
147 const struct cisco_slarp *slarp;
148 u_int sec,min,hrs,days;
150 printf("SLARP (length: %u), ",length);
151 if (length < SLARP_MIN_LEN)
154 slarp = (const struct cisco_slarp *)cp;
155 TCHECK2(*slarp, SLARP_MIN_LEN);
156 switch (EXTRACT_32BITS(&slarp->code)) {
160 * At least according to William "Chops" Westfield's
163 * http://www.nethelp.no/net/cisco-hdlc.txt
165 * the address and mask aren't used in requests -
170 printf("reply %s/%s",
171 ipaddr_string(&slarp->un.addr.addr),
172 ipaddr_string(&slarp->un.addr.mask));
174 case SLARP_KEEPALIVE:
175 printf("keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x",
176 EXTRACT_32BITS(&slarp->un.keep.myseq),
177 EXTRACT_32BITS(&slarp->un.keep.yourseq),
178 EXTRACT_16BITS(&slarp->un.keep.rel));
180 if (length >= SLARP_MAX_LEN) { /* uptime-stamp is optional */
184 sec = EXTRACT_32BITS(cp) / 1000;
185 min = sec / 60; sec -= min * 60;
186 hrs = min / 60; min -= hrs * 60;
187 days = hrs / 24; hrs -= days * 24;
188 printf(", link uptime=%ud%uh%um%us",days,hrs,min,sec);
192 printf("0x%02x unknown", EXTRACT_32BITS(&slarp->code));
194 print_unknown_data(cp+4,"\n\t",length-4);
198 if (SLARP_MAX_LEN < length && vflag)
199 printf(", (trailing junk: %d bytes)", length - SLARP_MAX_LEN);
201 print_unknown_data(cp+4,"\n\t",length-4);
211 * c-style: whitesmith