| /* |
| * 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 1.23 2002-04-07 10:05:40 guy Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <sys/param.h> |
| #include <sys/time.h> |
| #include <sys/socket.h> |
| |
| #include <netinet/in.h> |
| |
| #include <stdio.h> |
| #include <pcap.h> |
| #include <string.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "ethertype.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, |
| * and/or check that they're not walking off the end of the packet. |
| * Rather than pass them all the way down, we set these globals. |
| */ |
| snapend = p + caplen; |
| /* |
| * 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; |
| } |
| 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'); |
| --infodelay; |
| if (infoprint) |
| info(0); |
| } |