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 1.32.2.7 2005/04/27 14:35:56 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;
54 if (caplen < CHDLC_HDRLEN) {
59 proto = EXTRACT_16BITS(&p[2]);
69 printf("0x%02x ", p[0]);
72 printf("%d %04x: ", length, proto);
75 length -= CHDLC_HDRLEN;
76 ip = (const struct ip *)(p + CHDLC_HDRLEN);
79 ip_print(gndo, (const u_char *)ip, length);
83 ip6_print((const u_char *)ip, length);
86 case CHDLC_TYPE_SLARP:
87 chdlc_slarp_print((const u_char *)ip, length);
91 chdlc_cdp_print((const u_char *)ip, length);
95 case ETHERTYPE_MPLS_MULTI:
96 mpls_print((const u_char *)(ip), length);
99 /* is the fudge byte set ? lets verify by spotting ISO headers */
100 if (*(p+CHDLC_HDRLEN+1) == 0x81 ||
101 *(p+CHDLC_HDRLEN+1) == 0x82 ||
102 *(p+CHDLC_HDRLEN+1) == 0x83)
103 isoclns_print(p+CHDLC_HDRLEN+1, length-1, length-1);
105 isoclns_print(p+CHDLC_HDRLEN, length, length);
108 printf("unknown CHDLC protocol (0x%04x)", proto);
112 return (CHDLC_HDRLEN);
116 * The fixed-length portion of a SLARP packet.
120 #define SLARP_REQUEST 0
121 #define SLARP_REPLY 1
122 #define SLARP_KEEPALIVE 2
136 #define SLARP_MIN_LEN 14
137 #define SLARP_MAX_LEN 18
140 chdlc_slarp_print(const u_char *cp, u_int length)
142 const struct cisco_slarp *slarp;
143 u_int sec,min,hrs,days;
145 printf("SLARP (length: %u), ",length);
146 if (length < SLARP_MIN_LEN)
149 slarp = (const struct cisco_slarp *)cp;
150 TCHECK2(*slarp, SLARP_MIN_LEN);
151 switch (EXTRACT_32BITS(&slarp->code)) {
155 * At least according to William "Chops" Westfield's
158 * http://www.nethelp.no/net/cisco-hdlc.txt
160 * the address and mask aren't used in requests -
165 printf("reply %s/%s",
166 ipaddr_string(&slarp->un.addr.addr),
167 ipaddr_string(&slarp->un.addr.mask));
169 case SLARP_KEEPALIVE:
170 printf("keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x",
171 EXTRACT_32BITS(&slarp->un.keep.myseq),
172 EXTRACT_32BITS(&slarp->un.keep.yourseq),
173 EXTRACT_16BITS(&slarp->un.keep.rel));
175 if (length >= SLARP_MAX_LEN) { /* uptime-stamp is optional */
179 sec = EXTRACT_32BITS(cp) / 1000;
180 min = sec / 60; sec -= min * 60;
181 hrs = min / 60; min -= hrs * 60;
182 days = hrs / 24; hrs -= days * 24;
183 printf(", link uptime=%ud%uh%um%us",days,hrs,min,sec);
187 printf("0x%02x unknown", EXTRACT_32BITS(&slarp->code));
189 print_unknown_data(cp+4,"\n\t",length-4);
193 if (SLARP_MAX_LEN < length && vflag)
194 printf(", (trailing junk: %d bytes)", length - SLARP_MAX_LEN);
196 print_unknown_data(cp+4,"\n\t",length-4);
206 * c-style: whitesmith