mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/*
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* Copyright (c) 1997 Yen Yen Lim and North Dakota State University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Yen Yen Lim and
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North Dakota State University
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* \summary: SunATM DLPI capture printer */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <netdissect-stdinc.h>
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struct mbuf;
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struct rtentry;
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#include "netdissect.h"
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#include "extract.h"
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#include "atm.h"
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/* SunATM header for ATM packet */
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#define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */
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#define VPI_POS 1 /* VPI */
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#define VCI_POS 2 /* VCI */
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#define PKT_BEGIN_POS 4 /* Start of the ATM packet */
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/* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */
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#define PT_LANE 0x01 /* LANE */
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#define PT_LLC 0x02 /* LLC encapsulation */
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/*
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* This is the top level routine of the printer. 'p' points
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* to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp,
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* 'h->len' is the length of the packet off the wire, and 'h->caplen'
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* is the number of bytes actually captured.
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*/
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u_int
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sunatm_if_print(netdissect_options *ndo,
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const struct pcap_pkthdr *h, const u_char *p)
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{
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u_int caplen = h->caplen;
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u_int length = h->len;
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u_short vci;
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u_char vpi;
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u_int traftype;
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if (caplen < PKT_BEGIN_POS) {
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ND_PRINT((ndo, "[|atm]"));
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return (caplen);
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}
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if (ndo->ndo_eflag) {
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ND_PRINT((ndo, EXTRACT_U_1(p + DIR_POS) & 0x80 ? "Tx: " : "Rx: "));
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}
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switch (EXTRACT_U_1(p + DIR_POS) & 0x0f) {
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case PT_LANE:
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traftype = ATM_LANE;
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break;
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case PT_LLC:
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traftype = ATM_LLC;
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break;
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default:
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traftype = ATM_UNKNOWN;
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break;
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}
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vci = EXTRACT_BE_U_2(p + VCI_POS);
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vpi = EXTRACT_U_1(p + VPI_POS);
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p += PKT_BEGIN_POS;
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caplen -= PKT_BEGIN_POS;
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length -= PKT_BEGIN_POS;
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atm_print(ndo, vpi, vci, traftype, p, length, caplen);
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return (PKT_BEGIN_POS);
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}
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