| /* |
| * 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[] = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.33 2002-12-19 09:39:11 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; |
| } |
| } |