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virtio: Fix and activate PCI MSI-X support.
[dragonfly.git] / contrib / tcpdump / print-ether.c
blobe2f487c2a36ac49bbb486789e6b0ac4ef74b0418
1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
3 * The Regents of the University of California. All rights reserved.
4 *
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.
20 */
21 #ifndef lint
22 static const char rcsid[] _U_ =
23 "@(#) $Header: /tcpdump/master/tcpdump/print-ether.c,v 1.106 2008-02-06 10:47:53 guy Exp $ (LBL)";
24 #endif
25
26 #define NETDISSECT_REWORKED
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include <tcpdump-stdinc.h>
32
33 #include <stdio.h>
34 #include <pcap.h>
35
36 #include "interface.h"
37 #include "extract.h"
38 #include "addrtoname.h"
39 #include "ethertype.h"
40 #include "ether.h"
41
42 const struct tok ethertype_values[] = {
43 { ETHERTYPE_IP, "IPv4" },
44 { ETHERTYPE_MPLS, "MPLS unicast" },
45 { ETHERTYPE_MPLS_MULTI, "MPLS multicast" },
46 { ETHERTYPE_IPV6, "IPv6" },
47 { ETHERTYPE_8021Q, "802.1Q" },
48 { ETHERTYPE_8021Q9100, "802.1Q-9100" },
49 { ETHERTYPE_8021QinQ, "802.1Q-QinQ" },
50 { ETHERTYPE_8021Q9200, "802.1Q-9200" },
51 { ETHERTYPE_VMAN, "VMAN" },
52 { ETHERTYPE_PUP, "PUP" },
53 { ETHERTYPE_ARP, "ARP"},
54 { ETHERTYPE_REVARP, "Reverse ARP"},
55 { ETHERTYPE_NS, "NS" },
56 { ETHERTYPE_SPRITE, "Sprite" },
57 { ETHERTYPE_TRAIL, "Trail" },
58 { ETHERTYPE_MOPDL, "MOP DL" },
59 { ETHERTYPE_MOPRC, "MOP RC" },
60 { ETHERTYPE_DN, "DN" },
61 { ETHERTYPE_LAT, "LAT" },
62 { ETHERTYPE_SCA, "SCA" },
63 { ETHERTYPE_TEB, "TEB" },
64 { ETHERTYPE_LANBRIDGE, "Lanbridge" },
65 { ETHERTYPE_DECDNS, "DEC DNS" },
66 { ETHERTYPE_DECDTS, "DEC DTS" },
67 { ETHERTYPE_VEXP, "VEXP" },
68 { ETHERTYPE_VPROD, "VPROD" },
69 { ETHERTYPE_ATALK, "Appletalk" },
70 { ETHERTYPE_AARP, "Appletalk ARP" },
71 { ETHERTYPE_IPX, "IPX" },
72 { ETHERTYPE_PPP, "PPP" },
73 { ETHERTYPE_MPCP, "MPCP" },
74 { ETHERTYPE_SLOW, "Slow Protocols" },
75 { ETHERTYPE_PPPOED, "PPPoE D" },
76 { ETHERTYPE_PPPOES, "PPPoE S" },
77 { ETHERTYPE_EAPOL, "EAPOL" },
78 { ETHERTYPE_RRCP, "RRCP" },
79 { ETHERTYPE_JUMBO, "Jumbo" },
80 { ETHERTYPE_LOOPBACK, "Loopback" },
81 { ETHERTYPE_ISO, "OSI" },
82 { ETHERTYPE_GRE_ISO, "GRE-OSI" },
83 { ETHERTYPE_CFM_OLD, "CFM (old)" },
84 { ETHERTYPE_CFM, "CFM" },
85 { ETHERTYPE_LLDP, "LLDP" },
86 { ETHERTYPE_TIPC, "TIPC"},
87 { 0, NULL}
88 };
89
90 static inline void
91 ether_hdr_print(netdissect_options *ndo,
92 const u_char *bp, u_int length)
93 {
94 register const struct ether_header *ep;
95 u_int16_t ether_type;
96
97 ep = (const struct ether_header *)bp;
98
99 (void)ND_PRINT((ndo, "%s > %s",
100 etheraddr_string(ESRC(ep)),
101 etheraddr_string(EDST(ep))));
102
103 ether_type = EXTRACT_16BITS(&ep->ether_type);
104 if (!ndo->ndo_qflag) {
105 if (ether_type <= ETHERMTU)
106 (void)ND_PRINT((ndo, ", 802.3"));
107 else
108 (void)ND_PRINT((ndo, ", ethertype %s (0x%04x)",
109 tok2str(ethertype_values,"Unknown", ether_type),
110 ether_type));
111 } else {
112 if (ether_type <= ETHERMTU)
113 (void)ND_PRINT((ndo, ", 802.3"));
114 else
115 (void)ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type)));
116 }
117
118 (void)ND_PRINT((ndo, ", length %u: ", length));
119 }
120
121 /*
122 * Print an Ethernet frame.
123 * This might be encapsulated within another frame; we might be passed
124 * a pointer to a function that can print header information for that
125 * frame's protocol, and an argument to pass to that function.
126 */
127 void
128 ether_print(netdissect_options *ndo,
129 const u_char *p, u_int length, u_int caplen,
130 void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg)
131 {
132 struct ether_header *ep;
133 u_int orig_length;
134 u_short ether_type;
135 u_short extracted_ether_type;
136
137 if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) {
138 ND_PRINT((ndo, "[|ether]"));
139 return;
140 }
141
142 if (ndo->ndo_eflag) {
143 if (print_encap_header != NULL)
144 (*print_encap_header)(ndo, encap_header_arg);
145 ether_hdr_print(ndo, p, length);
146 }
147 orig_length = length;
148
149 length -= ETHER_HDRLEN;
150 caplen -= ETHER_HDRLEN;
151 ep = (struct ether_header *)p;
152 p += ETHER_HDRLEN;
153
154 ether_type = EXTRACT_16BITS(&ep->ether_type);
155
156 recurse:
157 /*
158 * Is it (gag) an 802.3 encapsulation?
159 */
160 if (ether_type <= ETHERMTU) {
161 /* Try to print the LLC-layer header & higher layers */
162 if (llc_print(p, length, caplen, ESRC(ep), EDST(ep),
163 &extracted_ether_type) == 0) {
164 /* ether_type not known, print raw packet */
165 if (!ndo->ndo_eflag) {
166 if (print_encap_header != NULL)
167 (*print_encap_header)(ndo, encap_header_arg);
168 ether_hdr_print(ndo, (u_char *)ep, orig_length);
169 }
170
171 if (!ndo->ndo_suppress_default_print)
172 ndo->ndo_default_print(ndo, p, caplen);
173 }
174 } else if (ether_type == ETHERTYPE_8021Q ||
175 ether_type == ETHERTYPE_8021Q9100 ||
176 ether_type == ETHERTYPE_8021Q9200 ||
177 ether_type == ETHERTYPE_8021QinQ) {
178 /*
179 * Print VLAN information, and then go back and process
180 * the enclosed type field.
181 */
182 if (caplen < 4 || length < 4) {
183 ND_PRINT((ndo, "[|vlan]"));
184 return;
185 }
186 if (ndo->ndo_eflag) {
187 u_int16_t tag = EXTRACT_16BITS(p);
188
189 ND_PRINT((ndo, "vlan %u, p %u%s, ",
190 tag & 0xfff,
191 tag >> 13,
192 (tag & 0x1000) ? ", CFI" : ""));
193 }
194
195 ether_type = EXTRACT_16BITS(p + 2);
196 if (ndo->ndo_eflag && ether_type > ETHERMTU)
197 ND_PRINT((ndo, "ethertype %s, ", tok2str(ethertype_values,"0x%04x", ether_type)));
198 p += 4;
199 length -= 4;
200 caplen -= 4;
201 goto recurse;
202 } else if (ether_type == ETHERTYPE_JUMBO) {
203 /*
204 * Alteon jumbo frames.
205 * See
206 *
207 * http://tools.ietf.org/html/draft-ietf-isis-ext-eth-01
208 *
209 * which indicates that, following the type field,
210 * there's an LLC header and payload.
211 */
212 /* Try to print the LLC-layer header & higher layers */
213 if (llc_print(p, length, caplen, ESRC(ep), EDST(ep),
214 &extracted_ether_type) == 0) {
215 /* ether_type not known, print raw packet */
216 if (!ndo->ndo_eflag) {
217 if (print_encap_header != NULL)
218 (*print_encap_header)(ndo, encap_header_arg);
219 ether_hdr_print(ndo, (u_char *)ep, orig_length);
220 }
221
222 if (!ndo->ndo_suppress_default_print)
223 ndo->ndo_default_print(ndo, p, caplen);
224 }
225 } else {
226 if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) {
227 /* ether_type not known, print raw packet */
228 if (!ndo->ndo_eflag) {
229 if (print_encap_header != NULL)
230 (*print_encap_header)(ndo, encap_header_arg);
231 ether_hdr_print(ndo, (u_char *)ep, orig_length);
232 }
233
234 if (!ndo->ndo_suppress_default_print)
235 ndo->ndo_default_print(ndo, p, caplen);
236 }
237 }
238 }
239
240 /*
241 * This is the top level routine of the printer. 'p' points
242 * to the ether header of the packet, 'h->ts' is the timestamp,
243 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
244 * is the number of bytes actually captured.
245 */
246 u_int
247 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
248 const u_char *p)
249 {
250 ether_print(ndo, p, h->len, h->caplen, NULL, NULL);
251
252 return (ETHER_HDRLEN);
253 }
254
255 /*
256 * This is the top level routine of the printer. 'p' points
257 * to the ether header of the packet, 'h->ts' is the timestamp,
258 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
259 * is the number of bytes actually captured.
260 *
261 * This is for DLT_NETANALYZER, which has a 4-byte pseudo-header
262 * before the Ethernet header.
263 */
264 u_int
265 netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
266 const u_char *p)
267 {
268 /*
269 * Fail if we don't have enough data for the Hilscher pseudo-header.
270 */
271 if (h->len < 4 || h->caplen < 4) {
272 printf("[|netanalyzer]");
273 return (h->caplen);
274 }
275
276 /* Skip the pseudo-header. */
277 ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL);
278
279 return (4 + ETHER_HDRLEN);
280 }
281
282 /*
283 * This is the top level routine of the printer. 'p' points
284 * to the ether header of the packet, 'h->ts' is the timestamp,
285 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
286 * is the number of bytes actually captured.
287 *
288 * This is for DLT_NETANALYZER_TRANSPARENT, which has a 4-byte
289 * pseudo-header, a 7-byte Ethernet preamble, and a 1-byte Ethernet SOF
290 * before the Ethernet header.
291 */
292 u_int
293 netanalyzer_transparent_if_print(netdissect_options *ndo,
294 const struct pcap_pkthdr *h,
295 const u_char *p)
296 {
297 /*
298 * Fail if we don't have enough data for the Hilscher pseudo-header,
299 * preamble, and SOF.
300 */
301 if (h->len < 12 || h->caplen < 12) {
302 printf("[|netanalyzer-transparent]");
303 return (h->caplen);
304 }
305
306 /* Skip the pseudo-header, preamble, and SOF. */
307 ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL);
308
309 return (12 + ETHER_HDRLEN);
310 }
311
312 /*
313 * Prints the packet payload, given an Ethernet type code for the payload's
314 * protocol.
315 *
316 * Returns non-zero if it can do so, zero if the ethertype is unknown.
317 */
318
319 int
320 ethertype_print(netdissect_options *ndo,
321 u_short ether_type, const u_char *p,
322 u_int length, u_int caplen)
323 {
324 switch (ether_type) {
325
326 case ETHERTYPE_IP:
327 ip_print(ndo, p, length);
328 return (1);
329
330 #ifdef INET6
331 case ETHERTYPE_IPV6:
332 ip6_print(ndo, p, length);
333 return (1);
334 #endif /*INET6*/
335
336 case ETHERTYPE_ARP:
337 case ETHERTYPE_REVARP:
338 arp_print(ndo, p, length, caplen);
339 return (1);
340
341 case ETHERTYPE_DN:
342 decnet_print(/*ndo,*/p, length, caplen);
343 return (1);
344
345 case ETHERTYPE_ATALK:
346 if (ndo->ndo_vflag)
347 fputs("et1 ", stdout);
348 atalk_print(/*ndo,*/p, length);
349 return (1);
350
351 case ETHERTYPE_AARP:
352 aarp_print(/*ndo,*/p, length);
353 return (1);
354
355 case ETHERTYPE_IPX:
356 ND_PRINT((ndo, "(NOV-ETHII) "));
357 ipx_print(/*ndo,*/p, length);
358 return (1);
359
360 case ETHERTYPE_ISO:
361 isoclns_print(/*ndo,*/p+1, length-1, length-1);
362 return(1);
363
364 case ETHERTYPE_PPPOED:
365 case ETHERTYPE_PPPOES:
366 case ETHERTYPE_PPPOED2:
367 case ETHERTYPE_PPPOES2:
368 pppoe_print(/*ndo,*/p, length);
369 return (1);
370
371 case ETHERTYPE_EAPOL:
372 eap_print(ndo, p, length);
373 return (1);
374
375 case ETHERTYPE_RRCP:
376 rrcp_print(ndo, p - 14 , length + 14);
377 return (1);
378
379 case ETHERTYPE_PPP:
380 if (length) {
381 printf(": ");
382 ppp_print(/*ndo,*/p, length);
383 }
384 return (1);
385
386 case ETHERTYPE_MPCP:
387 mpcp_print(/*ndo,*/p, length);
388 return (1);
389
390 case ETHERTYPE_SLOW:
391 slow_print(/*ndo,*/p, length);
392 return (1);
393
394 case ETHERTYPE_CFM:
395 case ETHERTYPE_CFM_OLD:
396 cfm_print(/*ndo,*/p, length);
397 return (1);
398
399 case ETHERTYPE_LLDP:
400 lldp_print(/*ndo,*/p, length);
401 return (1);
402
403 case ETHERTYPE_LOOPBACK:
404 return (1);
405
406 case ETHERTYPE_MPLS:
407 case ETHERTYPE_MPLS_MULTI:
408 mpls_print(/*ndo,*/p, length);
409 return (1);
410
411 case ETHERTYPE_TIPC:
412 tipc_print(ndo, p, length, caplen);
413 return (1);
414
415 case ETHERTYPE_LAT:
416 case ETHERTYPE_SCA:
417 case ETHERTYPE_MOPRC:
418 case ETHERTYPE_MOPDL:
419 /* default_print for now */
420 default:
421 return (0);
422 }
423 }
424
425
426 /*
427 * Local Variables:
428 * c-style: whitesmith
429 * c-basic-offset: 8
430 * End:
431 */
432
DragonFly BSD