2 * Marko Kiiskila carnil@cs.tut.fi
4 * Tampere University of Technology - Telecommunications Laboratory
6 * Permission to use, copy, modify and distribute this
7 * software and its documentation is hereby granted,
8 * provided that both the copyright notice and this
9 * permission notice appear in all copies of the software,
10 * derivative works or modified versions, and any portions
11 * thereof, that both notices appear in supporting
12 * documentation, and that the use of this software is
13 * acknowledged in any publications resulting from using
16 * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR
18 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS
24 static const char rcsid[] =
25 "@(#) $Header: /tcpdump/master/tcpdump/print-lane.c,v 1.11 2000/12/22 22:45:11 guy Exp $ (LBL)";
32 #include <sys/param.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
38 #include <netinet/in.h>
43 #include "interface.h"
44 #include "addrtoname.h"
49 lane_print(register const u_char *bp, int length)
51 register const struct lecdatahdr_8023 *ep;
53 ep = (const struct lecdatahdr_8023 *)bp;
55 (void)printf("lecid:%d %s %s %d: ",
57 etheraddr_string(ep->h_source),
58 etheraddr_string(ep->h_dest),
61 (void)printf("lecid:%d %s %s %s %d: ",
63 etheraddr_string(ep->h_source),
64 etheraddr_string(ep->h_dest),
65 etherproto_string(ep->h_type),
70 * This is the top level routine of the printer. 'p' is the points
71 * to the ether header of the packet, 'h->tv' is the timestamp,
72 * 'h->length' is the length of the packet off the wire, and 'h->caplen'
73 * is the number of bytes actually captured.
76 lane_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
78 int caplen = h->caplen;
80 struct lecdatahdr_8023 *ep;
82 u_short extracted_ethertype;
86 if (caplen < sizeof(struct lecdatahdr_8023)) {
92 lane_print(p, length);
95 * Some printers want to get back at the ethernet addresses,
96 * and/or check that they're not walking off the end of the packet.
97 * Rather than pass them all the way down, we set these globals.
100 snapend = p + caplen;
102 length -= sizeof(struct lecdatahdr_8023);
103 caplen -= sizeof(struct lecdatahdr_8023);
104 ep = (struct lecdatahdr_8023 *)p;
105 p += sizeof(struct lecdatahdr_8023);
107 ether_type = ntohs(ep->h_type);
110 * Is it (gag) an 802.3 encapsulation?
112 extracted_ethertype = 0;
113 if (ether_type < ETHERMTU) {
114 /* Try to print the LLC-layer header & higher layers */
115 if (llc_print(p, length, caplen, ep->h_source, ep->h_dest,
116 &extracted_ethertype) == 0) {
117 /* ether_type not known, print raw packet */
119 lane_print((u_char *)ep, length + sizeof(*ep));
120 if (extracted_ethertype) {
122 etherproto_string(htons(extracted_ethertype)));
124 if (!xflag && !qflag)
125 default_print(p, caplen);
127 } else if (ether_encap_print(ether_type, p, length, caplen,
128 &extracted_ethertype) == 0) {
129 /* ether_type not known, print raw packet */
131 lane_print((u_char *)ep, length + sizeof(*ep));
132 if (!xflag && !qflag)
133 default_print(p, caplen);
136 default_print(p, caplen);