333 lines
8.0 KiB
C
333 lines
8.0 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
#ifndef lint
|
|
static const char rcsid[] _U_ =
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.38.2.2 2005/06/20 07:45:06 hannes 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"
|
|
|
|
struct tok oam_celltype_values[] = {
|
|
{ 0x1, "Fault Management" },
|
|
{ 0x2, "Performance Management" },
|
|
{ 0x8, "activate/deactivate" },
|
|
{ 0xf, "System Management" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct tok oam_fm_functype_values[] = {
|
|
{ 0x0, "AIS" },
|
|
{ 0x1, "RDI" },
|
|
{ 0x4, "Continuity Check" },
|
|
{ 0x8, "Loopback" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct tok oam_pm_functype_values[] = {
|
|
{ 0x0, "Forward Monitoring" },
|
|
{ 0x1, "Backward Reporting" },
|
|
{ 0x2, "Monitoring and Reporting" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
struct tok oam_ad_functype_values[] = {
|
|
{ 0x0, "Performance Monitoring" },
|
|
{ 0x1, "Continuity Check" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok *oam_functype_values[16] = {
|
|
NULL,
|
|
oam_fm_functype_values, /* 1 */
|
|
oam_pm_functype_values, /* 2 */
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
oam_ad_functype_values, /* 8 */
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
/*
|
|
* 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->len' 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: /* fall through */
|
|
case OAMF4EC:
|
|
oam_print(p, length, ATM_OAM_HEC);
|
|
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;
|
|
}
|
|
}
|
|
|
|
int
|
|
oam_print (const u_char *p, u_int length, u_int hec) {
|
|
|
|
u_int16_t cell_header, cell_type, func_type,vpi,vci,payload,clp;
|
|
|
|
cell_header = EXTRACT_32BITS(p);
|
|
cell_type = ((*(p+4+hec))>>4) & 0x0f;
|
|
func_type = *(p+4+hec) & 0x0f;
|
|
|
|
vpi = (cell_header>>20)&0xff;
|
|
vci = (cell_header>>4)&0xffff;
|
|
payload = (cell_header>>1)&0x7;
|
|
clp = cell_header&0x1;
|
|
|
|
switch (vci) {
|
|
case OAMF4SC:
|
|
printf("OAM F4 (segment), ");
|
|
break;
|
|
case OAMF4EC:
|
|
printf("OAM F4 (end), ");
|
|
break;
|
|
default:
|
|
printf("OAM F5, ");
|
|
break;
|
|
}
|
|
|
|
if (eflag)
|
|
printf("vpi %u, vci %u, payload %u, clp %u, ",vpi,vci,payload,clp);
|
|
|
|
printf("cell-type %s (%u)",
|
|
tok2str(oam_celltype_values, "unknown", cell_type),
|
|
cell_type);
|
|
|
|
if (oam_functype_values[cell_type] == NULL)
|
|
printf(", func-type unknown (%u)", func_type);
|
|
else
|
|
printf(", func-type %s (%u)",
|
|
bittok2str(oam_functype_values[cell_type],"none",func_type),
|
|
func_type);
|
|
|
|
printf(", length %u",length);
|
|
return 1;
|
|
}
|