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 /* \summary: Cisco HDLC printer */
28 #include <netdissect-stdinc.h>
30 #include "netdissect.h"
31 #include "addrtoname.h"
32 #include "ethertype.h"
36 static void chdlc_slarp_print(netdissect_options *, const u_char *, u_int);
38 static const struct tok chdlc_cast_values[] = {
39 { CHDLC_UNICAST, "unicast" },
40 { CHDLC_BCAST, "bcast" },
45 /* Standard CHDLC printer */
47 chdlc_if_print(netdissect_options *ndo, 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) {
53 ND_PRINT((ndo, "[|chdlc]"));
56 return (chdlc_print(ndo, p,length));
60 chdlc_print(netdissect_options *ndo, register const u_char *p, u_int length)
64 proto = EXTRACT_16BITS(&p[2]);
66 ND_PRINT((ndo, "%s, ethertype %s (0x%04x), length %u: ",
67 tok2str(chdlc_cast_values, "0x%02x", p[0]),
68 tok2str(ethertype_values, "Unknown", proto),
73 length -= CHDLC_HDRLEN;
78 ip_print(ndo, p, length);
81 ip6_print(ndo, p, length);
83 case CHDLC_TYPE_SLARP:
84 chdlc_slarp_print(ndo, p, length);
88 chdlc_cdp_print(p, length);
92 case ETHERTYPE_MPLS_MULTI:
93 mpls_print(ndo, p, length);
96 /* is the fudge byte set ? lets verify by spotting ISO headers */
100 isoclns_print(ndo, p + 1, length - 1, ndo->ndo_snapend - p - 1);
102 isoclns_print(ndo, p, length, ndo->ndo_snapend - p);
106 ND_PRINT((ndo, "unknown CHDLC protocol (0x%04x)", proto));
110 return (CHDLC_HDRLEN);
114 * The fixed-length portion of a SLARP packet.
118 #define SLARP_REQUEST 0
119 #define SLARP_REPLY 1
120 #define SLARP_KEEPALIVE 2
134 #define SLARP_MIN_LEN 14
135 #define SLARP_MAX_LEN 18
138 chdlc_slarp_print(netdissect_options *ndo, const u_char *cp, u_int length)
140 const struct cisco_slarp *slarp;
141 u_int sec,min,hrs,days;
143 ND_PRINT((ndo, "SLARP (length: %u), ",length));
144 if (length < SLARP_MIN_LEN)
147 slarp = (const struct cisco_slarp *)cp;
148 ND_TCHECK2(*slarp, SLARP_MIN_LEN);
149 switch (EXTRACT_32BITS(&slarp->code)) {
151 ND_PRINT((ndo, "request"));
153 * At least according to William "Chops" Westfield's
156 * http://www.nethelp.no/net/cisco-hdlc.txt
158 * the address and mask aren't used in requests -
163 ND_PRINT((ndo, "reply %s/%s",
164 ipaddr_string(ndo, &slarp->un.addr.addr),
165 ipaddr_string(ndo, &slarp->un.addr.mask)));
167 case SLARP_KEEPALIVE:
168 ND_PRINT((ndo, "keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x",
169 EXTRACT_32BITS(&slarp->un.keep.myseq),
170 EXTRACT_32BITS(&slarp->un.keep.yourseq),
171 EXTRACT_16BITS(&slarp->un.keep.rel)));
173 if (length >= SLARP_MAX_LEN) { /* uptime-stamp is optional */
176 sec = EXTRACT_32BITS(cp) / 1000;
177 min = sec / 60; sec -= min * 60;
178 hrs = min / 60; min -= hrs * 60;
179 days = hrs / 24; hrs -= days * 24;
180 ND_PRINT((ndo, ", link uptime=%ud%uh%um%us",days,hrs,min,sec));
184 ND_PRINT((ndo, "0x%02x unknown", EXTRACT_32BITS(&slarp->code)));
185 if (ndo->ndo_vflag <= 1)
186 print_unknown_data(ndo,cp+4,"\n\t",length-4);
190 if (SLARP_MAX_LEN < length && ndo->ndo_vflag)
191 ND_PRINT((ndo, ", (trailing junk: %d bytes)", length - SLARP_MAX_LEN));
192 if (ndo->ndo_vflag > 1)
193 print_unknown_data(ndo,cp+4,"\n\t",length-4);
197 ND_PRINT((ndo, "[|slarp]"));
203 * c-style: whitesmith