2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
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.
21 * Hacked version of print-ether.c Larry Lile <lile@stdio.com>
23 * Further tweaked to more closely resemble print-fddi.c
24 * Guy Harris <guy@alum.mit.edu>
29 #define NETDISSECT_REWORKED
34 #include <tcpdump-stdinc.h>
38 #include "interface.h"
40 #include "addrtoname.h"
44 * Copyright (c) 1998, Larry Lile
45 * All rights reserved.
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
50 * 1. Redistributions of source code must retain the above copyright
51 * notice unmodified, this list of conditions, and the following
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
71 #define TOKEN_HDRLEN 14
72 #define TOKEN_RING_MAC_LEN 6
73 #define ROUTING_SEGMENT_MAX 16
74 #define IS_SOURCE_ROUTED(trp) ((trp)->token_shost[0] & 0x80)
75 #define FRAME_TYPE(trp) (((trp)->token_fc & 0xC0) >> 6)
76 #define TOKEN_FC_LLC 1
78 #define BROADCAST(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0xE000) >> 13)
79 #define RIF_LENGTH(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0x1f00) >> 8)
80 #define DIRECTION(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0x0080) >> 7)
81 #define LARGEST_FRAME(trp) ((EXTRACT_16BITS(&(trp)->token_rcf) & 0x0070) >> 4)
82 #define RING_NUMBER(trp, x) ((EXTRACT_16BITS(&(trp)->token_rseg[x]) & 0xfff0) >> 4)
83 #define BRIDGE_NUMBER(trp, x) ((EXTRACT_16BITS(&(trp)->token_rseg[x]) & 0x000f))
84 #define SEGMENT_COUNT(trp) ((int)((RIF_LENGTH(trp) - 2) / 2))
89 uint8_t token_dhost[TOKEN_RING_MAC_LEN];
90 uint8_t token_shost[TOKEN_RING_MAC_LEN];
92 uint16_t token_rseg[ROUTING_SEGMENT_MAX];
95 static const char tstr[] = "[|token-ring]";
97 /* Extract src, dst addresses */
99 extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst)
101 memcpy(fdst, (const char *)trp->token_dhost, 6);
102 memcpy(fsrc, (const char *)trp->token_shost, 6);
106 * Print the TR MAC header
109 token_hdr_print(netdissect_options *ndo,
110 register const struct token_header *trp, register u_int length,
111 register const u_char *fsrc, register const u_char *fdst)
113 const char *srcname, *dstname;
115 srcname = etheraddr_string(ndo, fsrc);
116 dstname = etheraddr_string(ndo, fdst);
119 ND_PRINT((ndo, "%02x %02x %s %s %d: ",
125 ND_PRINT((ndo, "%s %s %d: ", srcname, dstname, length));
128 static const char *broadcast_indicator[] = {
129 "Non-Broadcast", "Non-Broadcast",
130 "Non-Broadcast", "Non-Broadcast",
131 "All-routes", "All-routes",
132 "Single-route", "Single-route"
135 static const char *direction[] = {
136 "Forward", "Backward"
139 static const char *largest_frame[] = {
151 token_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
153 const struct token_header *trp;
154 u_short extracted_ethertype;
155 struct ether_header ehdr;
156 u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
159 trp = (const struct token_header *)p;
161 if (caplen < TOKEN_HDRLEN) {
162 ND_PRINT((ndo, "%s", tstr));
167 * Get the TR addresses into a canonical form
169 extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr));
171 /* Adjust for source routing information in the MAC header */
172 if (IS_SOURCE_ROUTED(trp)) {
173 /* Clear source-routed bit */
174 *ESRC(&ehdr) &= 0x7f;
177 token_hdr_print(ndo, trp, length, ESRC(&ehdr), EDST(&ehdr));
179 if (caplen < TOKEN_HDRLEN + 2) {
180 ND_PRINT((ndo, "%s", tstr));
183 route_len = RIF_LENGTH(trp);
184 hdr_len += route_len;
185 if (caplen < hdr_len) {
186 ND_PRINT((ndo, "%s", tstr));
189 if (ndo->ndo_vflag) {
190 ND_PRINT((ndo, "%s ", broadcast_indicator[BROADCAST(trp)]));
191 ND_PRINT((ndo, "%s", direction[DIRECTION(trp)]));
193 for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
194 ND_PRINT((ndo, " [%d:%d]", RING_NUMBER(trp, seg),
195 BRIDGE_NUMBER(trp, seg)));
197 ND_PRINT((ndo, "rt = %x", EXTRACT_16BITS(&trp->token_rcf)));
199 for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
200 ND_PRINT((ndo, ":%x", EXTRACT_16BITS(&trp->token_rseg[seg])));
202 ND_PRINT((ndo, " (%s) ", largest_frame[LARGEST_FRAME(trp)]));
205 token_hdr_print(ndo, trp, length, ESRC(&ehdr), EDST(&ehdr));
208 /* Skip over token ring MAC header and routing information */
213 /* Frame Control field determines interpretation of packet */
214 if (FRAME_TYPE(trp) == TOKEN_FC_LLC) {
215 /* Try to print the LLC-layer header & higher layers */
216 if (llc_print(ndo, p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
217 &extracted_ethertype) == 0) {
218 /* ether_type not known, print raw packet */
220 token_hdr_print(ndo, trp,
221 length + TOKEN_HDRLEN + route_len,
222 ESRC(&ehdr), EDST(&ehdr));
223 if (extracted_ethertype) {
224 ND_PRINT((ndo, "(LLC %s) ",
225 etherproto_string(htons(extracted_ethertype))));
227 if (!ndo->ndo_suppress_default_print)
228 ND_DEFAULTPRINT(p, caplen);
231 /* Some kinds of TR packet we cannot handle intelligently */
232 /* XXX - dissect MAC packets if frame type is 0 */
234 token_hdr_print(ndo, trp, length + TOKEN_HDRLEN + route_len,
235 ESRC(&ehdr), EDST(&ehdr));
236 if (!ndo->ndo_suppress_default_print)
237 ND_DEFAULTPRINT(p, caplen);
243 * This is the top level routine of the printer. 'p' points
244 * to the TR header of the packet, 'h->ts' is the timestamp,
245 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
246 * is the number of bytes actually captured.
249 token_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
251 return (token_print(ndo, p, h->len, h->caplen));