481 lines
11 KiB
C
481 lines
11 KiB
C
/*
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* Copyright (c) 1988-1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Format and print AppleTalk packets.
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*
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* $Id: print-atalk.c,v 1.1 1993/11/14 21:20:34 deraadt Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"@(#) Header: print-atalk.c,v 1.22 92/03/26 14:15:34 mccanne Exp (LBL)";
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#endif
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#ifdef __STDC__
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#include <stdlib.h>
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#endif
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#include <stdio.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcpip.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "appletalk.h"
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#include <strings.h>
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#include "extract.h"
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static char *ataddr_string();
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static struct atNBPtuple *nbp_tuple_print();
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static struct atNBPtuple *nbp_name_print();
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static void atp_print();
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static void nbp_print();
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static void atp_bitmap_print();
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/*
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* Print AppleTalk Datagram Delivery Protocol packets.
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*/
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void
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ddp_print(dp, length)
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register struct atDDP *dp;
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int length;
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{
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if (length < ddpSize) {
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(void)printf(" truncated-ddp %d", length);
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return;
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}
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(void)printf("%s.%d > %s.%d:",
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ataddr_string(EXTRACT_SHORT(&dp->srcNet), dp->srcNode),
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dp->srcSkt,
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ataddr_string(EXTRACT_SHORT(&dp->dstNet), dp->dstNode),
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dp->dstSkt);
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/* 'type' is the last field of 'dp' so we need the whole thing.
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If we cannot determine the type, bail out. (This last byte
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happens to be *one* byte past the end of tcpdump's minimum
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snapshot length.) */
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if ((u_char *)(dp + 1) > snapend) {
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printf(" [|atalk]");
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return;
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}
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length -= ddpSize;
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switch (dp->type) {
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case ddpRTMP:
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(void)printf(" at-rtmp %d", length);
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break;
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case ddpRTMPrequest:
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(void)printf(" at-rtmpReq %d", length);
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break;
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case ddpNBP:
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nbp_print((struct atNBP *)((u_char *)dp + ddpSize),
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length, dp);
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break;
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case ddpATP:
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atp_print((struct atATP *)((u_char *)dp + ddpSize), length);
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break;
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case ddpECHO:
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(void)printf(" at-echo %d", length);
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break;
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case ddpIP:
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(void)printf(" at-IP %d", length);
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break;
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case ddpARP:
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(void)printf(" at-ARP %d", length);
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break;
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case ddpKLAP:
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(void)printf(" at-KLAP %d", length);
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break;
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default:
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(void)printf(" at-#%d %d", length);
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break;
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}
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}
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static void
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atp_print(ap, length)
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register struct atATP *ap;
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int length;
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{
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char c;
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long data;
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if ((u_char *)(ap + 1) > snapend) {
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/* Just bail if we don't have the whole chunk. */
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printf(" [|atalk]");
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return;
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}
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length -= sizeof(*ap);
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switch (ap->control & 0xc0) {
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case atpReqCode:
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(void)printf(" atp-req%s %d",
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ap->control & atpXO? " " : "*",
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EXTRACT_SHORT(&ap->transID));
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atp_bitmap_print(ap->bitmap);
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if (length != 0)
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(void)printf(" [len=%d]", length);
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switch (ap->control & (atpEOM|atpSTS)) {
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case atpEOM:
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(void)printf(" [EOM]");
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break;
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case atpSTS:
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(void)printf(" [STS]");
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break;
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case atpEOM|atpSTS:
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(void)printf(" [EOM,STS]");
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break;
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}
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break;
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case atpRspCode:
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(void)printf(" atp-resp%s%d:%d (%d)",
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ap->control & atpEOM? "*" : " ",
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EXTRACT_SHORT(&ap->transID), ap->bitmap, length);
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switch (ap->control & (atpXO|atpSTS)) {
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case atpXO:
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(void)printf(" [XO]");
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break;
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case atpSTS:
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(void)printf(" [STS]");
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break;
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case atpXO|atpSTS:
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(void)printf(" [XO,STS]");
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break;
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}
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break;
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case atpRelCode:
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(void)printf(" atp-rel %d", EXTRACT_SHORT(&ap->transID));
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atp_bitmap_print(ap->bitmap);
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/* length should be zero */
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if (length)
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(void)printf(" [len=%d]", length);
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/* there shouldn't be any control flags */
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if (ap->control & (atpXO|atpEOM|atpSTS)) {
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c = '[';
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if (ap->control & atpXO) {
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(void)printf("%cXO", c);
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c = ',';
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}
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if (ap->control & atpEOM) {
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(void)printf("%cEOM", c);
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c = ',';
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}
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if (ap->control & atpSTS) {
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(void)printf("%cSTS", c);
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c = ',';
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}
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(void)printf("]");
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}
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break;
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default:
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(void)printf(" atp-0x%x %d (%d)", ap->control,
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EXTRACT_SHORT(&ap->transID), length);
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break;
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}
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data = EXTRACT_LONG(&ap->userData);
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if (data != 0)
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(void)printf(" 0x%x", data);
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}
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static void
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atp_bitmap_print(bm)
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register u_char bm;
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{
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register char c;
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register int i;
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/*
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* The '& 0xff' below is needed for compilers that want to sign
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* extend a u_char, which is the case with the Ultrix compiler.
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* (gcc is smart enough to eliminate it, at least on the Sparc).
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*/
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if ((bm + 1) & (bm & 0xff)) {
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c = '<';
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for (i = 0; bm; ++i) {
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if (bm & 1) {
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(void)printf("%c%d", c, i);
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c = ',';
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}
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bm >>= 1;
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}
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(void)printf(">");
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} else {
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for (i = 0; bm; ++i)
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bm >>= 1;
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if (i > 1)
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(void)printf("<0-%d>", i - 1);
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else
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(void)printf("<0>");
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}
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}
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static void
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nbp_print(np, length, dp)
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register struct atNBP *np;
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int length;
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register struct atDDP *dp;
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{
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register struct atNBPtuple *tp =
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(struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
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int i = length;
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u_char *ep;
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length -= nbpHeaderSize;
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if (length < 8) {
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/* must be room for at least one tuple */
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(void)printf(" truncated-nbp %d", length + nbpHeaderSize);
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return;
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}
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/* ep points to end of available data */
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ep = snapend;
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if ((u_char *)tp > ep) {
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printf(" [|atalk]");
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return;
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}
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switch (i = np->control & 0xf0) {
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case nbpBrRq:
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case nbpLkUp:
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(void)printf(i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:",
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np->id);
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if ((u_char *)(tp + 1) > ep) {
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printf(" [|atalk]");
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return;
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}
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(void)nbp_name_print(tp, ep);
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/*
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* look for anomalies: the spec says there can only
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* be one tuple, the address must match the source
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* address and the enumerator should be zero.
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*/
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if ((np->control & 0xf) != 1)
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(void)printf(" [ntup=%d]", np->control & 0xf);
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if (tp->enumerator)
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(void)printf(" [enum=%d]", tp->enumerator);
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if (EXTRACT_SHORT(&tp->net) != EXTRACT_SHORT(&dp->srcNet) ||
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tp->node != dp->srcNode || tp->skt != dp->srcSkt)
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(void)printf(" [addr=%s.%d]",
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ataddr_string(EXTRACT_SHORT(&tp->net),
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tp->node),
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tp->skt);
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break;
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case nbpLkUpReply:
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(void)printf(" nbp-reply %d:", np->id);
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/* print each of the tuples in the reply */
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for (i = np->control & 0xf; --i >= 0 && tp; )
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tp = nbp_tuple_print(tp, ep, dp);
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break;
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default:
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(void)printf(" nbp-0x%x %d (%d)", np->control, np->id,
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length);
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break;
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}
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}
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/* print a counted string */
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static char *
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print_cstring(cp, ep)
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register char *cp;
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register u_char *ep;
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{
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register int length;
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if (cp >= (char *)ep) {
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(void)printf("[|atalk]");
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return (0);
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}
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length = *cp++;
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/* Spec says string can be at most 32 bytes long */
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if (length < 0 || length > 32) {
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(void)printf("[len=%d]", length);
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return (0);
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}
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while (--length >= 0) {
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if (cp >= (char *)ep) {
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(void)printf("[|atalk]");
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return (0);
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}
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putchar(*cp++);
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}
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return (cp);
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}
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static struct atNBPtuple *
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nbp_tuple_print(tp, ep, dp)
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register struct atNBPtuple *tp;
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register u_char *ep;
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register struct atDDP *dp;
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{
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register struct atNBPtuple *tpn;
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if ((u_char *)(tp + 1) > ep) {
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printf(" [|atalk]");
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return 0;
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}
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tpn = nbp_name_print(tp, ep);
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/* if the enumerator isn't 1, print it */
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if (tp->enumerator != 1)
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(void)printf("(%d)", tp->enumerator);
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/* if the socket doesn't match the src socket, print it */
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if (tp->skt != dp->srcSkt)
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(void)printf(" %d", tp->skt);
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/* if the address doesn't match the src address, it's an anomaly */
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if (EXTRACT_SHORT(&tp->net) != EXTRACT_SHORT(&dp->srcNet) ||
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tp->node != dp->srcNode)
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(void)printf(" [addr=%s]",
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ataddr_string(EXTRACT_SHORT(&tp->net), tp->node));
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return (tpn);
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}
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static struct atNBPtuple *
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nbp_name_print(tp, ep)
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struct atNBPtuple *tp;
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register u_char *ep;
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{
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register char *cp = (char *)tp + nbpTupleSize;
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putchar(' ');
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/* Object */
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putchar('"');
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if (cp = print_cstring(cp, ep)) {
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/* Type */
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putchar(':');
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if (cp = print_cstring(cp, ep)) {
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/* Zone */
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putchar('@');
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if (cp = print_cstring(cp, ep))
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putchar('"');
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}
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}
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return ((struct atNBPtuple *)cp);
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}
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#define HASHNAMESIZE 4096
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struct hnamemem {
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int addr;
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char *name;
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struct hnamemem *nxt;
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};
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static struct hnamemem hnametable[HASHNAMESIZE];
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static char *
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ataddr_string(atnet, athost)
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u_short atnet;
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u_char athost;
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{
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register struct hnamemem *tp, *tp2;
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register int i = (atnet << 8) | athost;
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char nambuf[256];
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static int first = 1;
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FILE *fp;
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/*
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* if this is the first call, see if there's an AppleTalk
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* number to name map file.
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*/
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if (first && (first = 0, !nflag)
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&& (fp = fopen("/etc/atalk.names", "r"))) {
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char line[256];
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int i1, i2, i3;
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while (fgets(line, sizeof(line), fp)) {
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if (line[0] == '\n' || line[0] == 0 || line[0] == '#')
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continue;
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if (sscanf(line, "%d.%d.%d %s", &i1, &i2, &i3,
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nambuf) == 4)
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/* got a hostname. */
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i3 |= ((i1 << 8) | i2) << 8;
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else if (sscanf(line, "%d.%d %s", &i1, &i2,
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nambuf) == 3)
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/* got a net name */
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i3 = (((i1 << 8) | i2) << 8) | 255;
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else
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continue;
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for (tp = &hnametable[i3 & (HASHNAMESIZE-1)];
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tp->nxt; tp = tp->nxt)
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;
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tp->addr = i3;
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tp->nxt = (struct hnamemem *)calloc(1, sizeof(*tp));
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i3 = strlen(nambuf) + 1;
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tp->name = strcpy(malloc((unsigned) i3), nambuf);
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}
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fclose(fp);
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}
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for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
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if (tp->addr == i)
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return (tp->name);
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/* didn't have the node name -- see if we've got the net name */
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i |= 255;
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for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
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if (tp2->addr == i) {
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tp->addr = (atnet << 8) | athost;
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tp->nxt = (struct hnamemem *)calloc(1, sizeof(*tp));
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(void)sprintf(nambuf, "%s.%d", tp2->name, athost);
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i = strlen(nambuf) + 1;
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tp->name = strcpy(malloc((unsigned) i), nambuf);
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return (tp->name);
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}
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tp->addr = (atnet << 8) | athost;
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tp->nxt = (struct hnamemem *)calloc(1, sizeof(*tp));
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if (athost != 255)
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(void)sprintf(nambuf, "%d.%d.%d",
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atnet >> 8, atnet & 0xff, athost);
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else
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(void)sprintf(nambuf, "%d.%d", atnet >> 8, atnet & 0xff);
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i = strlen(nambuf) + 1;
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tp->name = strcpy(malloc((unsigned) i), nambuf);
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return (tp->name);
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}
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