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607 lines
14 KiB
C
607 lines
14 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. 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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* $FreeBSD$
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*/
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/print-atalk.c,v 1.64 2000/10/30 06:22:14 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netdb.h> /* for MAXHOSTNAMELEN on some platforms */
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#include "interface.h"
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#include "addrtoname.h"
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#include "ethertype.h"
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#include "extract.h" /* must come after interface.h */
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#include "appletalk.h"
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#include "savestr.h"
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static struct tok type2str[] = {
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{ ddpRTMP, "rtmp" },
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{ ddpRTMPrequest, "rtmpReq" },
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{ ddpECHO, "echo" },
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{ ddpIP, "IP" },
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{ ddpARP, "ARP" },
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{ ddpKLAP, "KLAP" },
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{ 0, NULL }
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};
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struct aarp {
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u_int16_t htype, ptype;
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u_int8_t halen, palen;
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u_int16_t op;
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u_int8_t hsaddr[6];
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u_int8_t psaddr[4];
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u_int8_t hdaddr[6];
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u_int8_t pdaddr[4];
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};
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static char tstr[] = "[|atalk]";
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static void atp_print(const struct atATP *, u_int);
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static void atp_bitmap_print(u_char);
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static void nbp_print(const struct atNBP *, u_int, u_short, u_char, u_char);
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static const char *print_cstring(const char *, const u_char *);
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static const struct atNBPtuple *nbp_tuple_print(const struct atNBPtuple *,
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const u_char *,
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u_short, u_char, u_char);
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static const struct atNBPtuple *nbp_name_print(const struct atNBPtuple *,
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const u_char *);
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static const char *ataddr_string(u_short, u_char);
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static void ddp_print(const u_char *, u_int, int, u_short, u_char, u_char);
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static const char *ddpskt_string(int);
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/*
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* Print AppleTalk LLAP packets.
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*/
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void
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llap_print(register const u_char *bp, u_int length)
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{
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register const struct LAP *lp;
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register const struct atDDP *dp;
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register const struct atShortDDP *sdp;
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u_short snet;
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#if 0
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lp = (struct LAP *)bp;
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bp += sizeof(*lp);
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length -= sizeof(*lp);
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#else
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{
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static struct LAP lp_ = {0, 0, lapDDP};
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lp = &lp_;
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}
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#endif
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switch (lp->type) {
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case lapShortDDP:
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if (length < ddpSSize) {
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(void)printf(" [|sddp %d]", length);
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return;
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}
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sdp = (const struct atShortDDP *)bp;
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printf("%s.%s",
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ataddr_string(0, lp->src), ddpskt_string(sdp->srcSkt));
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printf(" > %s.%s:",
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ataddr_string(0, lp->dst), ddpskt_string(sdp->dstSkt));
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bp += ddpSSize;
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length -= ddpSSize;
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ddp_print(bp, length, sdp->type, 0, lp->src, sdp->srcSkt);
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break;
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case lapDDP:
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if (length < ddpSize) {
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(void)printf(" [|ddp %d]", length);
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return;
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}
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dp = (const struct atDDP *)bp;
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snet = EXTRACT_16BITS(&dp->srcNet);
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printf("%s.%s", ataddr_string(snet, dp->srcNode),
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ddpskt_string(dp->srcSkt));
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printf(" > %s.%s:",
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ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
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ddpskt_string(dp->dstSkt));
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bp += ddpSize;
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length -= ddpSize;
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ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
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break;
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#ifdef notdef
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case lapKLAP:
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klap_print(bp, length);
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break;
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#endif
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default:
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printf("%d > %d at-lap#%d %d",
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lp->src, lp->dst, lp->type, length);
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break;
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}
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}
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/*
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* Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called
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* when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk
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* packets in them).
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*/
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void
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atalk_print(register const u_char *bp, u_int length)
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{
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register const struct atDDP *dp;
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u_short snet;
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if (length < ddpSize) {
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(void)printf(" [|ddp %d]", length);
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return;
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}
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dp = (const struct atDDP *)bp;
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snet = EXTRACT_16BITS(&dp->srcNet);
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printf("%s.%s", ataddr_string(snet, dp->srcNode),
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ddpskt_string(dp->srcSkt));
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printf(" > %s.%s:",
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ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
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ddpskt_string(dp->dstSkt));
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bp += ddpSize;
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length -= ddpSize;
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ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
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}
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/* XXX should probably pass in the snap header and do checks like arp_print() */
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void
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aarp_print(register const u_char *bp, u_int length)
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{
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register const struct aarp *ap;
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#define AT(member) ataddr_string((ap->member[1]<<8)|ap->member[2],ap->member[3])
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printf("aarp ");
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ap = (const struct aarp *)bp;
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if (ntohs(ap->htype) == 1 && ntohs(ap->ptype) == ETHERTYPE_ATALK &&
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ap->halen == 6 && ap->palen == 4 )
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switch (ntohs(ap->op)) {
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case 1: /* request */
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(void)printf("who-has %s tell %s",
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AT(pdaddr), AT(psaddr));
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return;
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case 2: /* response */
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(void)printf("reply %s is-at %s",
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AT(psaddr), etheraddr_string(ap->hsaddr));
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return;
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case 3: /* probe (oy!) */
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(void)printf("probe %s tell %s",
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AT(pdaddr), AT(psaddr));
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return;
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}
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(void)printf("len %u op %u htype %u ptype %#x halen %u palen %u",
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length, ntohs(ap->op), ntohs(ap->htype), ntohs(ap->ptype),
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ap->halen, ap->palen);
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}
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/*
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* Print AppleTalk Datagram Delivery Protocol packets.
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*/
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static void
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ddp_print(register const u_char *bp, register u_int length, register int t,
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register u_short snet, register u_char snode, u_char skt)
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{
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switch (t) {
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case ddpNBP:
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nbp_print((const struct atNBP *)bp, length, snet, snode, skt);
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break;
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case ddpATP:
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atp_print((const struct atATP *)bp, length);
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break;
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default:
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(void)printf(" at-%s %d", tok2str(type2str, NULL, t), 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(register const struct atATP *ap, u_int length)
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{
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char c;
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u_int32_t data;
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if ((const u_char *)(ap + 1) > snapend) {
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/* Just bail if we don't have the whole chunk. */
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fputs(tstr, stdout);
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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_16BITS(&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_16BITS(&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_16BITS(&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_16BITS(&ap->transID), length);
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break;
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}
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data = EXTRACT_32BITS(&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(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(register const struct atNBP *np, u_int length, register u_short snet,
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register u_char snode, register u_char skt)
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{
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register const struct atNBPtuple *tp =
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(struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
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int i;
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const 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 ((const u_char *)tp > ep) {
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fputs(tstr, stdout);
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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 ((const u_char *)(tp + 1) > ep) {
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fputs(tstr, stdout);
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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_16BITS(&tp->net) != snet ||
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tp->node != snode || tp->skt != skt)
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(void)printf(" [addr=%s.%d]",
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ataddr_string(EXTRACT_16BITS(&tp->net),
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tp->node), 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, snet, snode, skt);
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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 const char *
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print_cstring(register const char *cp, register const u_char *ep)
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{
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register u_int length;
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if (cp >= (const char *)ep) {
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fputs(tstr, stdout);
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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 > 32) {
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(void)printf("[len=%u]", length);
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return (0);
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}
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while ((int)--length >= 0) {
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if (cp >= (char *)ep) {
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fputs(tstr, stdout);
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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 const struct atNBPtuple *
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nbp_tuple_print(register const struct atNBPtuple *tp,
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register const u_char *ep,
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register u_short snet, register u_char snode,
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register u_char skt)
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{
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register const struct atNBPtuple *tpn;
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if ((const u_char *)(tp + 1) > ep) {
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fputs(tstr, stdout);
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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 != skt)
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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_16BITS(&tp->net) != snet || tp->node != snode)
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(void)printf(" [addr=%s]",
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ataddr_string(EXTRACT_16BITS(&tp->net), tp->node));
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return (tpn);
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}
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static const struct atNBPtuple *
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nbp_name_print(const struct atNBPtuple *tp, register const u_char *ep)
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{
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register const char *cp = (const 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)) != NULL) {
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/* Type */
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putchar(':');
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if ((cp = print_cstring(cp, ep)) != NULL) {
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/* Zone */
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putchar('@');
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if ((cp = print_cstring(cp, ep)) != NULL)
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putchar('"');
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}
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}
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return ((const 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 const char *
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ataddr_string(u_short atnet, 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[MAXHOSTNAMELEN + 20];
|
|
static int first = 1;
|
|
FILE *fp;
|
|
|
|
/*
|
|
* if this is the first call, see if there's an AppleTalk
|
|
* number to name map file.
|
|
*/
|
|
if (first && (first = 0, !nflag)
|
|
&& (fp = fopen("/etc/atalk.names", "r"))) {
|
|
char line[256];
|
|
int i1, i2, i3;
|
|
|
|
while (fgets(line, sizeof(line), fp)) {
|
|
if (line[0] == '\n' || line[0] == 0 || line[0] == '#')
|
|
continue;
|
|
if (sscanf(line, "%d.%d.%d %256s", &i1, &i2, &i3,
|
|
nambuf) == 4)
|
|
/* got a hostname. */
|
|
i3 |= ((i1 << 8) | i2) << 8;
|
|
else if (sscanf(line, "%d.%d %256s", &i1, &i2,
|
|
nambuf) == 3)
|
|
/* got a net name */
|
|
i3 = (((i1 << 8) | i2) << 8) | 255;
|
|
else
|
|
continue;
|
|
|
|
for (tp = &hnametable[i2 & (HASHNAMESIZE-1)];
|
|
tp->nxt; tp = tp->nxt)
|
|
;
|
|
tp->addr = i2;
|
|
tp->nxt = newhnamemem();
|
|
tp->name = savestr(nambuf);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
|
|
for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
|
|
if (tp->addr == i)
|
|
return (tp->name);
|
|
|
|
/* didn't have the node name -- see if we've got the net name */
|
|
i |= 255;
|
|
for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
|
|
if (tp2->addr == i) {
|
|
tp->addr = (atnet << 8) | athost;
|
|
tp->nxt = newhnamemem();
|
|
(void)snprintf(nambuf, sizeof(nambuf), "%s.%d",
|
|
tp2->name, athost);
|
|
tp->name = savestr(nambuf);
|
|
return (tp->name);
|
|
}
|
|
|
|
tp->addr = (atnet << 8) | athost;
|
|
tp->nxt = newhnamemem();
|
|
if (athost != 255)
|
|
(void)snprintf(nambuf, sizeof(nambuf), "%d.%d.%d",
|
|
atnet >> 8, atnet & 0xff, athost);
|
|
else
|
|
(void)snprintf(nambuf, sizeof(nambuf), "%d.%d", atnet >> 8,
|
|
atnet & 0xff);
|
|
tp->name = savestr(nambuf);
|
|
|
|
return (tp->name);
|
|
}
|
|
|
|
static struct tok skt2str[] = {
|
|
{ rtmpSkt, "rtmp" }, /* routing table maintenance */
|
|
{ nbpSkt, "nis" }, /* name info socket */
|
|
{ echoSkt, "echo" }, /* AppleTalk echo protocol */
|
|
{ zipSkt, "zip" }, /* zone info protocol */
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const char *
|
|
ddpskt_string(register int skt)
|
|
{
|
|
static char buf[8];
|
|
|
|
if (nflag) {
|
|
(void)snprintf(buf, sizeof(buf), "%d", skt);
|
|
return (buf);
|
|
}
|
|
return (tok2str(skt2str, "%d", skt));
|
|
}
|