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.
22 #define NETDISSECT_REWORKED
27 #include <tcpdump-stdinc.h>
29 #include "interface.h"
30 #include "addrtoname.h"
31 #include "ethertype.h"
35 static void chdlc_slarp_print(netdissect_options *, const u_char *, u_int);
37 static const struct tok chdlc_cast_values[] = {
38 { CHDLC_UNICAST, "unicast" },
39 { CHDLC_BCAST, "bcast" },
44 /* Standard CHDLC printer */
46 chdlc_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, register const u_char *p)
48 register u_int length = h->len;
49 register u_int caplen = h->caplen;
51 if (caplen < CHDLC_HDRLEN) {
52 ND_PRINT((ndo, "[|chdlc]"));
55 return (chdlc_print(ndo, p,length));
59 chdlc_print(netdissect_options *ndo, register const u_char *p, u_int length)
63 proto = EXTRACT_16BITS(&p[2]);
65 ND_PRINT((ndo, "%s, ethertype %s (0x%04x), length %u: ",
66 tok2str(chdlc_cast_values, "0x%02x", p[0]),
67 tok2str(ethertype_values, "Unknown", proto),
72 length -= CHDLC_HDRLEN;
77 ip_print(ndo, p, length);
80 ip6_print(ndo, p, length);
82 case CHDLC_TYPE_SLARP:
83 chdlc_slarp_print(ndo, p, length);
87 chdlc_cdp_print(p, length);
91 case ETHERTYPE_MPLS_MULTI:
92 mpls_print(ndo, p, length);
95 /* is the fudge byte set ? lets verify by spotting ISO headers */
99 isoclns_print(ndo, p + 1, length - 1, length - 1);
101 isoclns_print(ndo, p, length, length);
105 ND_PRINT((ndo, "unknown CHDLC protocol (0x%04x)", proto));
109 return (CHDLC_HDRLEN);
113 * The fixed-length portion of a SLARP packet.
117 #define SLARP_REQUEST 0
118 #define SLARP_REPLY 1
119 #define SLARP_KEEPALIVE 2
133 #define SLARP_MIN_LEN 14
134 #define SLARP_MAX_LEN 18
137 chdlc_slarp_print(netdissect_options *ndo, const u_char *cp, u_int length)
139 const struct cisco_slarp *slarp;
140 u_int sec,min,hrs,days;
142 ND_PRINT((ndo, "SLARP (length: %u), ",length));
143 if (length < SLARP_MIN_LEN)
146 slarp = (const struct cisco_slarp *)cp;
147 ND_TCHECK2(*slarp, SLARP_MIN_LEN);
148 switch (EXTRACT_32BITS(&slarp->code)) {
150 ND_PRINT((ndo, "request"));
152 * At least according to William "Chops" Westfield's
155 * http://www.nethelp.no/net/cisco-hdlc.txt
157 * the address and mask aren't used in requests -
162 ND_PRINT((ndo, "reply %s/%s",
163 ipaddr_string(ndo, &slarp->un.addr.addr),
164 ipaddr_string(ndo, &slarp->un.addr.mask)));
166 case SLARP_KEEPALIVE:
167 ND_PRINT((ndo, "keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x",
168 EXTRACT_32BITS(&slarp->un.keep.myseq),
169 EXTRACT_32BITS(&slarp->un.keep.yourseq),
170 EXTRACT_16BITS(&slarp->un.keep.rel)));
172 if (length >= SLARP_MAX_LEN) { /* uptime-stamp is optional */
175 sec = EXTRACT_32BITS(cp) / 1000;
176 min = sec / 60; sec -= min * 60;
177 hrs = min / 60; min -= hrs * 60;
178 days = hrs / 24; hrs -= days * 24;
179 ND_PRINT((ndo, ", link uptime=%ud%uh%um%us",days,hrs,min,sec));
183 ND_PRINT((ndo, "0x%02x unknown", EXTRACT_32BITS(&slarp->code)));
184 if (ndo->ndo_vflag <= 1)
185 print_unknown_data(ndo,cp+4,"\n\t",length-4);
189 if (SLARP_MAX_LEN < length && ndo->ndo_vflag)
190 ND_PRINT((ndo, ", (trailing junk: %d bytes)", length - SLARP_MAX_LEN));
191 if (ndo->ndo_vflag > 1)
192 print_unknown_data(ndo,cp+4,"\n\t",length-4);
196 ND_PRINT((ndo, "[|slarp]"));
202 * c-style: whitesmith