/* * 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 1.25 2002-08-01 08:53:01 risso Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "interface.h" #include "extract.h" #include "addrtoname.h" #include "ethertype.h" #include "atm.h" #include "atmuni31.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) { struct ether_header ehdr; u_short ether_type; u_short extracted_ethertype; ether_type = p[6] << 8 | p[7]; /* * Fake up an Ethernet header for the benefit of printers that * insist on "packetp" pointing to an Ethernet header. */ memset(&ehdr, '\0', sizeof ehdr); /* * Some printers want to get back at the ethernet addresses. * Rather than pass it all the way down, we set this global. * * Actually, the only printers that use packetp are print-arp.c * and print-bootp.c, and they assume that packetp points to an * Ethernet header. The right thing to do is to fix them to know * which link type is in use when they excavate. XXX */ packetp = (u_char *)&ehdr; if (!llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr), &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); } } /* * This is the top level routine of the printer. 'p' is the points * to the LLC/SNAP header of the packet, 'tvp' is the timestamp, * 'length' is the length of the packet off the wire, and 'caplen' * is the number of bytes actually captured. */ void atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) { u_int caplen = h->caplen; u_int length = h->len; ++infodelay; ts_print(&h->ts); if (caplen < 8) { printf("[|atm]"); goto out; } /* * Some printers want to check that they're not walking off the * end of the packet. * Rather than pass it all the way down, we set this global. */ snapend = p + caplen; if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) { /* * XXX - assume 802.6 MAC header from Fore driver. * XXX - should we also assume it's not a MAC header * if it begins with 0xfe 0xfe 0x03, for RFC 2684 * routed NLPID-formatted PDUs? */ if (eflag) printf("%04x%04x %04x%04x ", p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3], p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7], p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11], p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]); p += 20; length -= 20; caplen -= 20; } atm_llc_print(p, length, caplen); if (xflag) default_print(p, caplen); out: putchar('\n'); } /* * 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); /* * Some printers want to check that they're not walking off the * end of the packet. * Rather than pass it all the way down, we set this global. */ snapend = p + caplen; if (vpi == 0) { switch (vci) { case PPC: sig_print(p, caplen); goto out; case BCC: printf("broadcast sig: "); goto out; case OAMF4SC: printf("oamF4(segment): "); goto out; case OAMF4EC: printf("oamF4(end): "); goto out; case METAC: printf("meta: "); goto out; case ILMIC: printf("ilmi: "); snmp_print(p, length); goto out; } } 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; } out: if (xflag) default_print(p, caplen); }