initrd: Add diff/sdiff back to rescue and fix build
[dragonfly.git] / contrib / tcpdump / print-token.c
blobbcb72584c294cbe09f47c8d3a47691e3c5920c28
1 /*
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
16 * written permission.
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>
27 /* \summary: Token Ring printer */
29 #ifdef HAVE_CONFIG_H
30 #include <config.h>
31 #endif
33 #include "netdissect-stdinc.h"
35 #include <string.h>
37 #include "netdissect.h"
38 #include "extract.h"
39 #include "addrtoname.h"
42 * Copyright (c) 1998, Larry Lile
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice unmodified, this list of conditions, and the following
50 * disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
55 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
69 #define TOKEN_HDRLEN 14
70 #define ROUTING_SEGMENT_MAX 16
71 #define IS_SOURCE_ROUTED(trp) ((trp)->token_shost[0] & 0x80)
72 #define FRAME_TYPE(trp) ((GET_U_1((trp)->token_fc) & 0xC0) >> 6)
73 #define TOKEN_FC_LLC 1
75 #define BROADCAST(trp) ((GET_BE_U_2((trp)->token_rcf) & 0xE000) >> 13)
76 #define RIF_LENGTH(trp) ((GET_BE_U_2((trp)->token_rcf) & 0x1f00) >> 8)
77 #define DIRECTION(trp) ((GET_BE_U_2((trp)->token_rcf) & 0x0080) >> 7)
78 #define LARGEST_FRAME(trp) ((GET_BE_U_2((trp)->token_rcf) & 0x0070) >> 4)
79 #define RING_NUMBER(trp, x) ((GET_BE_U_2((trp)->token_rseg[x]) & 0xfff0) >> 4)
80 #define BRIDGE_NUMBER(trp, x) (GET_BE_U_2((trp)->token_rseg[x]) & 0x000f)
81 #define SEGMENT_COUNT(trp) ((int)((RIF_LENGTH(trp) - 2) / 2))
83 struct token_header {
84 nd_uint8_t token_ac;
85 nd_uint8_t token_fc;
86 nd_mac_addr token_dhost;
87 nd_mac_addr token_shost;
88 nd_uint16_t token_rcf;
89 nd_uint16_t token_rseg[ROUTING_SEGMENT_MAX];
93 /* Extract src, dst addresses */
94 static void
95 extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst)
97 memcpy(fdst, (const char *)trp->token_dhost, 6);
98 memcpy(fsrc, (const char *)trp->token_shost, 6);
102 * Print the TR MAC header
104 static void
105 token_hdr_print(netdissect_options *ndo,
106 const struct token_header *trp, u_int length,
107 const u_char *fsrc, const u_char *fdst)
109 const char *srcname, *dstname;
111 srcname = etheraddr_string(ndo, fsrc);
112 dstname = etheraddr_string(ndo, fdst);
114 if (!ndo->ndo_qflag)
115 ND_PRINT("%02x %02x ",
116 GET_U_1(trp->token_ac),
117 GET_U_1(trp->token_fc));
118 ND_PRINT("%s > %s, length %u: ",
119 srcname, dstname,
120 length);
123 static const char *broadcast_indicator[] = {
124 "Non-Broadcast", "Non-Broadcast",
125 "Non-Broadcast", "Non-Broadcast",
126 "All-routes", "All-routes",
127 "Single-route", "Single-route"
130 static const char *direction[] = {
131 "Forward", "Backward"
134 static const char *largest_frame[] = {
135 "516",
136 "1500",
137 "2052",
138 "4472",
139 "8144",
140 "11407",
141 "17800",
142 "??"
145 u_int
146 token_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
148 const struct token_header *trp;
149 int llc_hdrlen;
150 nd_mac_addr srcmac, dstmac;
151 struct lladdr_info src, dst;
152 u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
153 int seg;
155 ndo->ndo_protocol = "token-ring";
156 trp = (const struct token_header *)p;
158 if (caplen < TOKEN_HDRLEN) {
159 nd_print_trunc(ndo);
160 return hdr_len;
164 * Get the TR addresses into a canonical form
166 extract_token_addrs(trp, (char*)srcmac, (char*)dstmac);
168 /* Adjust for source routing information in the MAC header */
169 if (IS_SOURCE_ROUTED(trp)) {
170 /* Clear source-routed bit */
171 srcmac[0] &= 0x7f;
173 if (ndo->ndo_eflag)
174 token_hdr_print(ndo, trp, length, srcmac, dstmac);
176 if (caplen < TOKEN_HDRLEN + 2) {
177 nd_print_trunc(ndo);
178 return hdr_len;
180 route_len = RIF_LENGTH(trp);
181 hdr_len += route_len;
182 if (caplen < hdr_len) {
183 nd_print_trunc(ndo);
184 return hdr_len;
186 if (ndo->ndo_vflag) {
187 ND_PRINT("%s ", broadcast_indicator[BROADCAST(trp)]);
188 ND_PRINT("%s", direction[DIRECTION(trp)]);
190 for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
191 ND_PRINT(" [%u:%u]", RING_NUMBER(trp, seg),
192 BRIDGE_NUMBER(trp, seg));
193 } else {
194 ND_PRINT("rt = %x", GET_BE_U_2(trp->token_rcf));
196 for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
197 ND_PRINT(":%x",
198 GET_BE_U_2(trp->token_rseg[seg]));
200 ND_PRINT(" (%s) ", largest_frame[LARGEST_FRAME(trp)]);
201 } else {
202 if (ndo->ndo_eflag)
203 token_hdr_print(ndo, trp, length, srcmac, dstmac);
206 src.addr = srcmac;
207 src.addr_string = etheraddr_string;
208 dst.addr = dstmac;
209 dst.addr_string = etheraddr_string;
211 /* Skip over token ring MAC header and routing information */
212 length -= hdr_len;
213 p += hdr_len;
214 caplen -= hdr_len;
216 /* Frame Control field determines interpretation of packet */
217 if (FRAME_TYPE(trp) == TOKEN_FC_LLC) {
218 /* Try to print the LLC-layer header & higher layers */
219 llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst);
220 if (llc_hdrlen < 0) {
221 /* packet type not known, print raw packet */
222 if (!ndo->ndo_suppress_default_print)
223 ND_DEFAULTPRINT(p, caplen);
224 llc_hdrlen = -llc_hdrlen;
226 hdr_len += llc_hdrlen;
227 } else {
228 /* Some kinds of TR packet we cannot handle intelligently */
229 /* XXX - dissect MAC packets if frame type is 0 */
230 if (!ndo->ndo_eflag)
231 token_hdr_print(ndo, trp, length + TOKEN_HDRLEN + route_len,
232 srcmac, dstmac);
233 if (!ndo->ndo_suppress_default_print)
234 ND_DEFAULTPRINT(p, caplen);
236 return (hdr_len);
240 * This is the top level routine of the printer. 'p' points
241 * to the TR header of the packet, 'h->ts' is the timestamp,
242 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
243 * is the number of bytes actually captured.
245 void
246 token_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
248 ndo->ndo_protocol = "token-ring";
249 ndo->ndo_ll_hdr_len += token_print(ndo, p, h->len, h->caplen);