334 lines
8.0 KiB
C
334 lines
8.0 KiB
C
/*
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* Copyright (c) 1994, 1995, 1996, 1997
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* The Regents of the University of California. 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: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $FreeBSD$
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.38.2.2 2005/06/20 07:45:06 hannes Exp $ (LBL)";
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#endif
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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 <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <pcap.h>
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#include <string.h>
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#include "interface.h"
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#include "extract.h"
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#include "addrtoname.h"
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#include "ethertype.h"
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#include "atm.h"
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#include "atmuni31.h"
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#include "llc.h"
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#include "ether.h"
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struct tok oam_celltype_values[] = {
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{ 0x1, "Fault Management" },
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{ 0x2, "Performance Management" },
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{ 0x8, "activate/deactivate" },
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{ 0xf, "System Management" },
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{ 0, NULL }
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};
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struct tok oam_fm_functype_values[] = {
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{ 0x0, "AIS" },
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{ 0x1, "RDI" },
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{ 0x4, "Continuity Check" },
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{ 0x8, "Loopback" },
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{ 0, NULL }
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};
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struct tok oam_pm_functype_values[] = {
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{ 0x0, "Forward Monitoring" },
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{ 0x1, "Backward Reporting" },
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{ 0x2, "Monitoring and Reporting" },
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{ 0, NULL }
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};
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struct tok oam_ad_functype_values[] = {
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{ 0x0, "Performance Monitoring" },
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{ 0x1, "Continuity Check" },
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{ 0, NULL }
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};
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static const struct tok *oam_functype_values[16] = {
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NULL,
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oam_fm_functype_values, /* 1 */
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oam_pm_functype_values, /* 2 */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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oam_ad_functype_values, /* 8 */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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};
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/*
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* Print an RFC 1483 LLC-encapsulated ATM frame.
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*/
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static void
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atm_llc_print(const u_char *p, int length, int caplen)
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{
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u_short extracted_ethertype;
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if (!llc_print(p, length, caplen, NULL, NULL,
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&extracted_ethertype)) {
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/* ether_type not known, print raw packet */
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if (extracted_ethertype) {
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printf("(LLC %s) ",
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etherproto_string(htons(extracted_ethertype)));
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}
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if (!xflag && !qflag)
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default_print(p, caplen);
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}
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}
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/*
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* Given a SAP value, generate the LLC header value for a UI packet
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* with that SAP as the source and destination SAP.
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*/
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#define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
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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 LLC/SNAP header of 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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atm_if_print(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_int32_t llchdr;
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u_int hdrlen = 0;
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if (caplen < 8) {
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printf("[|atm]");
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return (caplen);
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}
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/*
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* Extract the presumed LLC header into a variable, for quick
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* testing.
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* Then check for a header that's neither a header for a SNAP
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* packet nor an RFC 2684 routed NLPID-formatted PDU nor
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* an 802.2-but-no-SNAP IP packet.
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*/
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llchdr = EXTRACT_24BITS(p);
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if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
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llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
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llchdr != LLC_UI_HDR(LLCSAP_IP)) {
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/*
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* XXX - assume 802.6 MAC header from Fore driver.
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*
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* Unfortunately, the above list doesn't check for
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* all known SAPs, doesn't check for headers where
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* the source and destination SAP aren't the same,
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* and doesn't check for non-UI frames. It also
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* runs the risk of an 802.6 MAC header that happens
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* to begin with one of those values being
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* incorrectly treated as an 802.2 header.
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*
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* So is that Fore driver still around? And, if so,
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* is it still putting 802.6 MAC headers on ATM
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* packets? If so, could it be changed to use a
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* new DLT_IEEE802_6 value if we added it?
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*/
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if (eflag)
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printf("%08x%08x %08x%08x ",
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EXTRACT_32BITS(p),
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EXTRACT_32BITS(p+4),
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EXTRACT_32BITS(p+8),
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EXTRACT_32BITS(p+12));
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p += 20;
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length -= 20;
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caplen -= 20;
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hdrlen += 20;
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}
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atm_llc_print(p, length, caplen);
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return (hdrlen);
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}
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/*
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* ATM signalling.
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*/
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static struct tok msgtype2str[] = {
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{ CALL_PROCEED, "Call_proceeding" },
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{ CONNECT, "Connect" },
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{ CONNECT_ACK, "Connect_ack" },
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{ SETUP, "Setup" },
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{ RELEASE, "Release" },
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{ RELEASE_DONE, "Release_complete" },
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{ RESTART, "Restart" },
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{ RESTART_ACK, "Restart_ack" },
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{ STATUS, "Status" },
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{ STATUS_ENQ, "Status_enquiry" },
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{ ADD_PARTY, "Add_party" },
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{ ADD_PARTY_ACK, "Add_party_ack" },
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{ ADD_PARTY_REJ, "Add_party_reject" },
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{ DROP_PARTY, "Drop_party" },
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{ DROP_PARTY_ACK, "Drop_party_ack" },
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{ 0, NULL }
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};
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static void
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sig_print(const u_char *p, int caplen)
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{
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bpf_u_int32 call_ref;
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if (caplen < PROTO_POS) {
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printf("[|atm]");
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return;
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}
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if (p[PROTO_POS] == Q2931) {
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/*
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* protocol:Q.2931 for User to Network Interface
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* (UNI 3.1) signalling
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*/
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printf("Q.2931");
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if (caplen < MSG_TYPE_POS) {
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printf(" [|atm]");
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return;
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}
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printf(":%s ",
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tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
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if (caplen < CALL_REF_POS+3) {
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printf("[|atm]");
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return;
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}
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call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
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printf("CALL_REF:0x%06x", call_ref);
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} else {
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/* SCCOP with some unknown protocol atop it */
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printf("SSCOP, proto %d ", p[PROTO_POS]);
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}
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}
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/*
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* Print an ATM PDU (such as an AAL5 PDU).
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*/
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void
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atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
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u_int caplen)
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{
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if (eflag)
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printf("VPI:%u VCI:%u ", vpi, vci);
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if (vpi == 0) {
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switch (vci) {
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case PPC:
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sig_print(p, caplen);
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return;
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case BCC:
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printf("broadcast sig: ");
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return;
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case OAMF4SC: /* fall through */
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case OAMF4EC:
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oam_print(p, length, ATM_OAM_HEC);
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return;
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case METAC:
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printf("meta: ");
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return;
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case ILMIC:
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printf("ilmi: ");
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snmp_print(p, length);
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return;
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}
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}
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switch (traftype) {
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case ATM_LLC:
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default:
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/*
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* Assumes traffic is LLC if unknown.
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*/
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atm_llc_print(p, length, caplen);
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break;
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case ATM_LANE:
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lane_print(p, length, caplen);
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break;
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}
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}
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int
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oam_print (const u_char *p, u_int length, u_int hec) {
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u_int16_t cell_header, cell_type, func_type,vpi,vci,payload,clp;
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cell_header = EXTRACT_32BITS(p);
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cell_type = ((*(p+4+hec))>>4) & 0x0f;
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func_type = *(p+4+hec) & 0x0f;
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vpi = (cell_header>>20)&0xff;
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vci = (cell_header>>4)&0xffff;
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payload = (cell_header>>1)&0x7;
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clp = cell_header&0x1;
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switch (vci) {
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case OAMF4SC:
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printf("OAM F4 (segment), ");
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break;
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case OAMF4EC:
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printf("OAM F4 (end), ");
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break;
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default:
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printf("OAM F5, ");
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break;
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}
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if (eflag)
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printf("vpi %u, vci %u, payload %u, clp %u, ",vpi,vci,payload,clp);
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printf("cell-type %s (%u)",
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tok2str(oam_celltype_values, "unknown", cell_type),
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cell_type);
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if (oam_functype_values[cell_type] == NULL)
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printf(", func-type unknown (%u)", func_type);
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else
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printf(", func-type %s (%u)",
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bittok2str(oam_functype_values[cell_type],"none",func_type),
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func_type);
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printf(", length %u",length);
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return 1;
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}
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