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.
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.
24 static const char rcsid[] _U_ =
25 "@(#) $Header: /tcpdump/master/tcpdump/print-ether.c,v 1.105.2.1 2008-02-06 10:49:22 guy Exp $ (LBL)";
32 #include <tcpdump-stdinc.h>
37 #include "interface.h"
38 #include "addrtoname.h"
39 #include "ethertype.h"
43 const struct tok ethertype_values[] = {
44 { ETHERTYPE_IP, "IPv4" },
45 { ETHERTYPE_MPLS, "MPLS unicast" },
46 { ETHERTYPE_MPLS_MULTI, "MPLS multicast" },
47 { ETHERTYPE_IPV6, "IPv6" },
48 { ETHERTYPE_8021Q, "802.1Q" },
49 { ETHERTYPE_VMAN, "VMAN" },
50 { ETHERTYPE_PUP, "PUP" },
51 { ETHERTYPE_ARP, "ARP"},
52 { ETHERTYPE_REVARP, "Reverse ARP"},
53 { ETHERTYPE_NS, "NS" },
54 { ETHERTYPE_SPRITE, "Sprite" },
55 { ETHERTYPE_TRAIL, "Trail" },
56 { ETHERTYPE_MOPDL, "MOP DL" },
57 { ETHERTYPE_MOPRC, "MOP RC" },
58 { ETHERTYPE_DN, "DN" },
59 { ETHERTYPE_LAT, "LAT" },
60 { ETHERTYPE_SCA, "SCA" },
61 { ETHERTYPE_LANBRIDGE, "Lanbridge" },
62 { ETHERTYPE_DECDNS, "DEC DNS" },
63 { ETHERTYPE_DECDTS, "DEC DTS" },
64 { ETHERTYPE_VEXP, "VEXP" },
65 { ETHERTYPE_VPROD, "VPROD" },
66 { ETHERTYPE_ATALK, "Appletalk" },
67 { ETHERTYPE_AARP, "Appletalk ARP" },
68 { ETHERTYPE_IPX, "IPX" },
69 { ETHERTYPE_PPP, "PPP" },
70 { ETHERTYPE_MPCP, "MPCP" },
71 { ETHERTYPE_SLOW, "Slow Protocols" },
72 { ETHERTYPE_PPPOED, "PPPoE D" },
73 { ETHERTYPE_PPPOES, "PPPoE S" },
74 { ETHERTYPE_EAPOL, "EAPOL" },
75 { ETHERTYPE_RRCP, "RRCP" },
76 { ETHERTYPE_JUMBO, "Jumbo" },
77 { ETHERTYPE_LOOPBACK, "Loopback" },
78 { ETHERTYPE_ISO, "OSI" },
79 { ETHERTYPE_GRE_ISO, "GRE-OSI" },
80 { ETHERTYPE_CFM_OLD, "CFM (old)" },
81 { ETHERTYPE_CFM, "CFM" },
82 { ETHERTYPE_LLDP, "LLDP" },
87 ether_hdr_print(register const u_char *bp, u_int length)
89 register const struct ether_header *ep;
90 ep = (const struct ether_header *)bp;
92 (void)printf("%s > %s",
93 etheraddr_string(ESRC(ep)),
94 etheraddr_string(EDST(ep)));
97 if (ntohs(ep->ether_type) <= ETHERMTU)
98 (void)printf(", 802.3");
100 (void)printf(", ethertype %s (0x%04x)",
101 tok2str(ethertype_values,"Unknown", ntohs(ep->ether_type)),
102 ntohs(ep->ether_type));
104 if (ntohs(ep->ether_type) <= ETHERMTU)
105 (void)printf(", 802.3");
107 (void)printf(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ntohs(ep->ether_type)));
110 (void)printf(", length %u: ", length);
114 ether_print(const u_char *p, u_int length, u_int caplen)
116 struct ether_header *ep;
118 u_short extracted_ether_type;
120 if (caplen < ETHER_HDRLEN) {
126 ether_hdr_print(p, length);
128 length -= ETHER_HDRLEN;
129 caplen -= ETHER_HDRLEN;
130 ep = (struct ether_header *)p;
133 ether_type = ntohs(ep->ether_type);
136 * Is it (gag) an 802.3 encapsulation?
138 if (ether_type <= ETHERMTU) {
139 /* Try to print the LLC-layer header & higher layers */
140 if (llc_print(p, length, caplen, ESRC(ep), EDST(ep),
141 &extracted_ether_type) == 0) {
142 /* ether_type not known, print raw packet */
144 ether_hdr_print((u_char *)ep, length + ETHER_HDRLEN);
146 if (!suppress_default_print)
147 default_print(p, caplen);
149 } else if (ether_encap_print(ether_type, p, length, caplen,
150 &extracted_ether_type) == 0) {
151 /* ether_type not known, print raw packet */
153 ether_hdr_print((u_char *)ep, length + ETHER_HDRLEN);
155 if (!suppress_default_print)
156 default_print(p, caplen);
161 * This is the top level routine of the printer. 'p' points
162 * to the ether header of the packet, 'h->ts' is the timestamp,
163 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
164 * is the number of bytes actually captured.
167 ether_if_print(const struct pcap_pkthdr *h, const u_char *p)
169 ether_print(p, h->len, h->caplen);
171 return (ETHER_HDRLEN);
175 * Prints the packet encapsulated in an Ethernet data segment
176 * (or an equivalent encapsulation), given the Ethernet type code.
178 * Returns non-zero if it can do so, zero if the ethertype is unknown.
180 * The Ethernet type code is passed through a pointer; if it was
181 * ETHERTYPE_8021Q, it gets updated to be the Ethernet type of
182 * the 802.1Q payload, for the benefit of lower layers that might
183 * want to know what it is.
187 ether_encap_print(u_short ether_type, const u_char *p,
188 u_int length, u_int caplen, u_short *extracted_ether_type)
191 *extracted_ether_type = ether_type;
193 switch (ether_type) {
196 ip_print(gndo, p, length);
201 ip6_print(p, length);
206 case ETHERTYPE_REVARP:
207 arp_print(gndo, p, length, caplen);
211 decnet_print(p, length, caplen);
214 case ETHERTYPE_ATALK:
216 fputs("et1 ", stdout);
217 atalk_print(p, length);
221 aarp_print(p, length);
225 printf("(NOV-ETHII) ");
226 ipx_print(p, length);
229 case ETHERTYPE_8021Q:
231 printf("vlan %u, p %u%s, ",
232 ntohs(*(u_int16_t *)p) & 0xfff,
233 ntohs(*(u_int16_t *)p) >> 13,
234 (ntohs(*(u_int16_t *)p) & 0x1000) ? ", CFI" : "");
236 ether_type = ntohs(*(u_int16_t *)(p + 2));
241 if (ether_type > ETHERMTU) {
243 printf("ethertype %s, ",
244 tok2str(ethertype_values,"0x%04x", ether_type));
248 *extracted_ether_type = 0;
250 if (llc_print(p, length, caplen, p - 18, p - 12,
251 extracted_ether_type) == 0) {
252 ether_hdr_print(p - 18, length + 4);
254 if (!suppress_default_print) {
255 default_print(p - 18, caplen + 4);
262 case ETHERTYPE_JUMBO:
263 ether_type = ntohs(*(u_int16_t *)(p));
268 if (ether_type > ETHERMTU) {
270 printf("ethertype %s, ",
271 tok2str(ethertype_values,"0x%04x", ether_type));
275 *extracted_ether_type = 0;
277 if (llc_print(p, length, caplen, p - 16, p - 10,
278 extracted_ether_type) == 0) {
279 ether_hdr_print(p - 16, length + 2);
281 if (!suppress_default_print) {
282 default_print(p - 16, caplen + 2);
289 isoclns_print(p+1, length-1, length-1);
292 case ETHERTYPE_PPPOED:
293 case ETHERTYPE_PPPOES:
294 case ETHERTYPE_PPPOED2:
295 case ETHERTYPE_PPPOES2:
296 pppoe_print(p, length);
299 case ETHERTYPE_EAPOL:
300 eap_print(gndo, p, length);
304 rrcp_print(gndo, p - 14 , length + 14);
310 ppp_print(p, length);
315 mpcp_print(p, length);
319 slow_print(p, length);
323 case ETHERTYPE_CFM_OLD:
324 cfm_print(p, length);
328 lldp_print(p, length);
331 case ETHERTYPE_LOOPBACK:
335 case ETHERTYPE_MPLS_MULTI:
336 mpls_print(p, length);
341 case ETHERTYPE_MOPRC:
342 case ETHERTYPE_MOPDL:
343 /* default_print for now */
352 * c-style: whitesmith