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/*
* Copyright (c) 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $FreeBSD$
*/
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.33.2.2 2003/11/16 08:51:11 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <pcap.h>
#include <string.h>
#include "interface.h"
#include "extract.h"
#include "addrtoname.h"
#include "ethertype.h"
#include "atm.h"
#include "atmuni31.h"
#include "llc.h"
#include "ether.h"
/*
* Print an RFC 1483 LLC-encapsulated ATM frame.
*/
static void
atm_llc_print(const u_char *p, int length, int caplen)
{
u_short extracted_ethertype;
if (!llc_print(p, length, caplen, NULL, NULL,
&extracted_ethertype)) {
/* ether_type not known, print raw packet */
if (extracted_ethertype) {
printf("(LLC %s) ",
etherproto_string(htons(extracted_ethertype)));
}
if (!xflag && !qflag)
default_print(p, caplen);
}
}
/*
* Given a SAP value, generate the LLC header value for a UI packet
* with that SAP as the source and destination SAP.
*/
#define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
/*
* This is the top level routine of the printer. 'p' points
* to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
* 'h->length' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
atm_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
u_int32_t llchdr;
u_int hdrlen = 0;
if (caplen < 8) {
printf("[|atm]");
return (caplen);
}
/*
* Extract the presumed LLC header into a variable, for quick
* testing.
* Then check for a header that's neither a header for a SNAP
* packet nor an RFC 2684 routed NLPID-formatted PDU nor
* an 802.2-but-no-SNAP IP packet.
*/
llchdr = EXTRACT_24BITS(p);
if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
llchdr != LLC_UI_HDR(LLCSAP_IP)) {
/*
* XXX - assume 802.6 MAC header from Fore driver.
*
* Unfortunately, the above list doesn't check for
* all known SAPs, doesn't check for headers where
* the source and destination SAP aren't the same,
* and doesn't check for non-UI frames. It also
* runs the risk of an 802.6 MAC header that happens
* to begin with one of those values being
* incorrectly treated as an 802.2 header.
*
* So is that Fore driver still around? And, if so,
* is it still putting 802.6 MAC headers on ATM
* packets? If so, could it be changed to use a
* new DLT_IEEE802_6 value if we added it?
*/
if (eflag)
printf("%08x%08x %08x%08x ",
EXTRACT_32BITS(p),
EXTRACT_32BITS(p+4),
EXTRACT_32BITS(p+8),
EXTRACT_32BITS(p+12));
p += 20;
length -= 20;
caplen -= 20;
hdrlen += 20;
}
atm_llc_print(p, length, caplen);
return (hdrlen);
}
/*
* ATM signalling.
*/
static struct tok msgtype2str[] = {
{ CALL_PROCEED, "Call_proceeding" },
{ CONNECT, "Connect" },
{ CONNECT_ACK, "Connect_ack" },
{ SETUP, "Setup" },
{ RELEASE, "Release" },
{ RELEASE_DONE, "Release_complete" },
{ RESTART, "Restart" },
{ RESTART_ACK, "Restart_ack" },
{ STATUS, "Status" },
{ STATUS_ENQ, "Status_enquiry" },
{ ADD_PARTY, "Add_party" },
{ ADD_PARTY_ACK, "Add_party_ack" },
{ ADD_PARTY_REJ, "Add_party_reject" },
{ DROP_PARTY, "Drop_party" },
{ DROP_PARTY_ACK, "Drop_party_ack" },
{ 0, NULL }
};
static void
sig_print(const u_char *p, int caplen)
{
bpf_u_int32 call_ref;
if (caplen < PROTO_POS) {
printf("[|atm]");
return;
}
if (p[PROTO_POS] == Q2931) {
/*
* protocol:Q.2931 for User to Network Interface
* (UNI 3.1) signalling
*/
printf("Q.2931");
if (caplen < MSG_TYPE_POS) {
printf(" [|atm]");
return;
}
printf(":%s ",
tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
if (caplen < CALL_REF_POS+3) {
printf("[|atm]");
return;
}
call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
printf("CALL_REF:0x%06x", call_ref);
} else {
/* SCCOP with some unknown protocol atop it */
printf("SSCOP, proto %d ", p[PROTO_POS]);
}
}
/*
* Print an ATM PDU (such as an AAL5 PDU).
*/
void
atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
u_int caplen)
{
if (eflag)
printf("VPI:%u VCI:%u ", vpi, vci);
if (vpi == 0) {
switch (vci) {
case PPC:
sig_print(p, caplen);
return;
case BCC:
printf("broadcast sig: ");
return;
case OAMF4SC:
printf("oamF4(segment): ");
return;
case OAMF4EC:
printf("oamF4(end): ");
return;
case METAC:
printf("meta: ");
return;
case ILMIC:
printf("ilmi: ");
snmp_print(p, length);
return;
}
}
switch (traftype) {
case ATM_LLC:
default:
/*
* Assumes traffic is LLC if unknown.
*/
atm_llc_print(p, length, caplen);
break;
case ATM_LANE:
lane_print(p, length, caplen);
break;
}
}
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