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 #ifdef HAVE_CONFIG_H
36 #include "config.h"
37 #endif
38
39 #include <netdissect-stdinc.h>
40
41 struct mbuf;
42 struct rtentry;
43
44 #include "netdissect.h"
45 #include "extract.h"
46
47 #include "atm.h"
48
49 /* SunATM header for ATM packet */
50 #define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */
51 #define VPI_POS 1 /* VPI */
52 #define VCI_POS 2 /* VCI */
53 #define PKT_BEGIN_POS 4 /* Start of the ATM packet */
54
55 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */
56 #define PT_LANE 0x01 /* LANE */
57 #define PT_LLC 0x02 /* LLC encapsulation */
58
59 /*
60 * This is the top level routine of the printer. 'p' points
61 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp,
62 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
63 * is the number of bytes actually captured.
64 */
65 u_int
sunatm_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)66 sunatm_if_print(netdissect_options *ndo,
67 const struct pcap_pkthdr *h, const u_char *p)
68 {
69 u_int caplen = h->caplen;
70 u_int length = h->len;
71 u_short vci;
72 u_char vpi;
73 u_int traftype;
74
75 if (caplen < PKT_BEGIN_POS) {
76 ND_PRINT((ndo, "[|atm]"));
77 return (caplen);
78 }
79
80 if (ndo->ndo_eflag) {
81 ND_PRINT((ndo, p[DIR_POS] & 0x80 ? "Tx: " : "Rx: "));
82 }
83
84 switch (p[DIR_POS] & 0x0f) {
85
86 case PT_LANE:
87 traftype = ATM_LANE;
88 break;
89
90 case PT_LLC:
91 traftype = ATM_LLC;
92 break;
93
94 default:
95 traftype = ATM_UNKNOWN;
96 break;
97 }
98
99 vci = EXTRACT_16BITS(&p[VCI_POS]);
100 vpi = p[VPI_POS];
101
102 p += PKT_BEGIN_POS;
103 caplen -= PKT_BEGIN_POS;
104 length -= PKT_BEGIN_POS;
105 atm_print(ndo, vpi, vci, traftype, p, length, caplen);
106
107 return (PKT_BEGIN_POS);
108 }
109