1 /*
2 * Copyright (c) 1997 Yen Yen Lim and North Dakota State University
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Yen Yen Lim and
16 North Dakota State University
17 * 4. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /* \summary: SunATM DLPI capture printer */
34
35 #include <config.h>
36
37 #include "netdissect-stdinc.h"
38
39 #define ND_LONGJMP_FROM_TCHECK
40 #include "netdissect.h"
41 #include "extract.h"
42
43 #include "atm.h"
44
45 /* SunATM header for ATM packet */
46 #define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */
47 #define VPI_POS 1 /* VPI */
48 #define VCI_POS 2 /* VCI */
49 #define PKT_BEGIN_POS 4 /* Start of the ATM packet */
50
51 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */
52 #define PT_LANE 0x01 /* LANE */
53 #define PT_LLC 0x02 /* LLC encapsulation */
54
55 /*
56 * This is the top level routine of the printer. 'p' points
57 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp,
58 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
59 * is the number of bytes actually captured.
60 */
61 void
sunatm_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)62 sunatm_if_print(netdissect_options *ndo,
63 const struct pcap_pkthdr *h, const u_char *p)
64 {
65 u_int caplen = h->caplen;
66 u_int length = h->len;
67 u_short vci;
68 u_char vpi;
69 u_int traftype;
70
71 ndo->ndo_protocol = "sunatm";
72
73 if (ndo->ndo_eflag) {
74 ND_PRINT(GET_U_1(p + DIR_POS) & 0x80 ? "Tx: " : "Rx: ");
75 }
76
77 switch (GET_U_1(p + DIR_POS) & 0x0f) {
78
79 case PT_LANE:
80 traftype = ATM_LANE;
81 break;
82
83 case PT_LLC:
84 traftype = ATM_LLC;
85 break;
86
87 default:
88 traftype = ATM_UNKNOWN;
89 break;
90 }
91
92 vpi = GET_U_1(p + VPI_POS);
93 vci = GET_BE_U_2(p + VCI_POS);
94
95 p += PKT_BEGIN_POS;
96 caplen -= PKT_BEGIN_POS;
97 length -= PKT_BEGIN_POS;
98 ndo->ndo_ll_hdr_len += PKT_BEGIN_POS;
99 atm_print(ndo, vpi, vci, traftype, p, length, caplen);
100 }
101