/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 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.
*
* Format and print AppleTalk packets.
*/
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-atalk.c,v 1.81 2004/05/01 09:41:50 hannes Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pcap.h>
#include "interface.h"
#include "addrtoname.h"
#include "ethertype.h"
#include "extract.h" /* must come after interface.h */
#include "appletalk.h"
static struct tok type2str[] = {
{ ddpRTMP, "rtmp" },
{ ddpRTMPrequest, "rtmpReq" },
{ ddpECHO, "echo" },
{ ddpIP, "IP" },
{ ddpARP, "ARP" },
{ ddpKLAP, "KLAP" },
{ 0, NULL }
};
struct aarp {
u_int16_t htype, ptype;
u_int8_t halen, palen;
u_int16_t op;
u_int8_t hsaddr[6];
u_int8_t psaddr[4];
u_int8_t hdaddr[6];
u_int8_t pdaddr[4];
};
static char tstr[] = "[|atalk]";
static void atp_print(const struct atATP *, u_int);
static void atp_bitmap_print(u_char);
static void nbp_print(const struct atNBP *, u_int, u_short, u_char, u_char);
static const char *print_cstring(const char *, const u_char *);
static const struct atNBPtuple *nbp_tuple_print(const struct atNBPtuple *,
const u_char *,
u_short, u_char, u_char);
static const struct atNBPtuple *nbp_name_print(const struct atNBPtuple *,
const u_char *);
static const char *ataddr_string(u_short, u_char);
static void ddp_print(const u_char *, u_int, int, u_short, u_char, u_char);
static const char *ddpskt_string(int);
/*
* Print LLAP packets received on a physical LocalTalk interface.
*/
u_int
ltalk_if_print(const struct pcap_pkthdr *h, const u_char *p)
{
return (llap_print(p, h->caplen));
}
/*
* Print AppleTalk LLAP packets.
*/
u_int
llap_print(register const u_char *bp, u_int length)
{
register const struct LAP *lp;
register const struct atDDP *dp;
register const struct atShortDDP *sdp;
u_short snet;
u_int hdrlen;
/*
* Our packet is on a 4-byte boundary, as we're either called
* directly from a top-level link-layer printer (ltalk_if_print)
* or from the UDP printer. The LLAP+DDP header is a multiple
* of 4 bytes in length, so the DDP payload is also on a 4-byte
* boundary, and we don't need to align it before calling
* "ddp_print()".
*/
lp = (const struct LAP *)bp;
bp += sizeof(*lp);
length -= sizeof(*lp);
hdrlen = sizeof(*lp);
switch (lp->type) {
case lapShortDDP:
if (length < ddpSSize) {
(void)printf(" [|sddp %d]", length);
return (length);
}
sdp = (const struct atShortDDP *)bp;
printf("%s.%s",
ataddr_string(0, lp->src), ddpskt_string(sdp->srcSkt));
printf(" > %s.%s:",
ataddr_string(0, lp->dst), ddpskt_string(sdp->dstSkt));
bp += ddpSSize;
length -= ddpSSize;
hdrlen += ddpSSize;
ddp_print(bp, length, sdp->type, 0, lp->src, sdp->srcSkt);
break;
case lapDDP:
if (length < ddpSize) {
(void)printf(" [|ddp %d]", length);
return (length);
}
dp = (const struct atDDP *)bp;
snet = EXTRACT_16BITS(&dp->srcNet);
printf("%s.%s", ataddr_string(snet, dp->srcNode),
ddpskt_string(dp->srcSkt));
printf(" > %s.%s:",
ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
ddpskt_string(dp->dstSkt));
bp += ddpSize;
length -= ddpSize;
hdrlen += ddpSize;
ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
break;
#ifdef notdef
case lapKLAP:
klap_print(bp, length);
break;
#endif
default:
printf("%d > %d at-lap#%d %d",
lp->src, lp->dst, lp->type, length);
break;
}
return (hdrlen);
}
/*
* Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called
* when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk
* packets in them).
*/
void
atalk_print(register const u_char *bp, u_int length)
{
register const struct atDDP *dp;
u_short snet;
if(!eflag)
printf("AT ");
if (length < ddpSize) {
(void)printf(" [|ddp %d]", length);
return;
}
dp = (const struct atDDP *)bp;
snet = EXTRACT_16BITS(&dp->srcNet);
printf("%s.%s", ataddr_string(snet, dp->srcNode),
ddpskt_string(dp->srcSkt));
printf(" > %s.%s: ",
ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
ddpskt_string(dp->dstSkt));
bp += ddpSize;
length -= ddpSize;
ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
}
/* XXX should probably pass in the snap header and do checks like arp_print() */
void
aarp_print(register const u_char *bp, u_int length)
{
register const struct aarp *ap;
#define AT(member) ataddr_string((ap->member[1]<<8)|ap->member[2],ap->member[3])
printf("aarp ");
ap = (const struct aarp *)bp;
if (EXTRACT_16BITS(&ap->htype) == 1 &&
EXTRACT_16BITS(&ap->ptype) == ETHERTYPE_ATALK &&
ap->halen == 6 && ap->palen == 4 )
switch (EXTRACT_16BITS(&ap->op)) {
case 1: /* request */
(void)printf("who-has %s tell %s",
AT(pdaddr), AT(psaddr));
return;
case 2: /* response */
(void)printf("reply %s is-at %s",
AT(pdaddr), etheraddr_string(ap->hdaddr));
return;
case 3: /* probe (oy!) */
(void)printf("probe %s tell %s",
AT(pdaddr), AT(psaddr));
return;
}
(void)printf("len %u op %u htype %u ptype %#x halen %u palen %u",
length, EXTRACT_16BITS(&ap->op), EXTRACT_16BITS(&ap->htype),
EXTRACT_16BITS(&ap->ptype), ap->halen, ap->palen);
}
/*
* Print AppleTalk Datagram Delivery Protocol packets.
*/
static void
ddp_print(register const u_char *bp, register u_int length, register int t,
register u_short snet, register u_char snode, u_char skt)
{
switch (t) {
case ddpNBP:
nbp_print((const struct atNBP *)bp, length, snet, snode, skt);
break;
case ddpATP:
atp_print((const struct atATP *)bp, length);
break;
case ddpEIGRP:
eigrp_print(bp, length);
break;
default:
(void)printf(" at-%s %d", tok2str(type2str, NULL, t), length);
break;
}
}
static void
atp_print(register const struct atATP *ap, u_int length)
{
char c;
u_int32_t data;
if ((const u_char *)(ap + 1) > snapend) {
/* Just bail if we don't have the whole chunk. */
fputs(tstr, stdout);
return;
}
length -= sizeof(*ap);
switch (ap->control & 0xc0) {
case atpReqCode:
(void)printf(" atp-req%s %d",
ap->control & atpXO? " " : "*",
EXTRACT_16BITS(&ap->transID));
atp_bitmap_print(ap->bitmap);
if (length != 0)
(void)printf(" [len=%d]", length);
switch (ap->control & (atpEOM|atpSTS)) {
case atpEOM:
(void)printf(" [EOM]");
break;
case atpSTS:
(void)printf(" [STS]");
break;
case atpEOM|atpSTS:
(void)printf(" [EOM,STS]");
break;
}
break;
case atpRspCode:
(void)printf(" atp-resp%s%d:%d (%d)",
ap->control & atpEOM? "*" : " ",
EXTRACT_16BITS(&ap->transID), ap->bitmap, length);
switch (ap->control & (atpXO|atpSTS)) {
case atpXO:
(void)printf(" [XO]");
break;
case atpSTS:
(void)printf(" [STS]");
break;
case atpXO|atpSTS:
(void)printf(" [XO,STS]");
break;
}
break;
case atpRelCode:
(void)printf(" atp-rel %d", EXTRACT_16BITS(&ap->transID));
atp_bitmap_print(ap->bitmap);
/* length should be zero */
if (length)
(void)printf(" [len=%d]", length);
/* there shouldn't be any control flags */
if (ap->control & (atpXO|atpEOM|atpSTS)) {
c = '[';
if (ap->control & atpXO) {
(void)printf("%cXO", c);
c = ',';
}
if (ap->control & atpEOM) {
(void)printf("%cEOM", c);
c = ',';
}
if (ap->control & atpSTS) {
(void)printf("%cSTS", c);
c = ',';
}
(void)printf("]");
}
break;
default:
(void)printf(" atp-0x%x %d (%d)", ap->control,
EXTRACT_16BITS(&ap->transID), length);
break;
}
data = EXTRACT_32BITS(&ap->userData);
if (data != 0)
(void)printf(" 0x%x", data);
}
static void
atp_bitmap_print(register u_char bm)
{
register char c;
register int i;
/*
* The '& 0xff' below is needed for compilers that want to sign
* extend a u_char, which is the case with the Ultrix compiler.
* (gcc is smart enough to eliminate it, at least on the Sparc).
*/
if ((bm + 1) & (bm & 0xff)) {
c = '<';
for (i = 0; bm; ++i) {
if (bm & 1) {
(void)printf("%c%d", c, i);
c = ',';
}
bm >>= 1;
}
(void)printf(">");
} else {
for (i = 0; bm; ++i)
bm >>= 1;
if (i > 1)
(void)printf("<0-%d>", i - 1);
else
(void)printf("<0>");
}
}
static void
nbp_print(register const struct atNBP *np, u_int length, register u_short snet,
register u_char snode, register u_char skt)
{
register const struct atNBPtuple *tp =
(const struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
int i;
const u_char *ep;
if (length < nbpHeaderSize) {
(void)printf(" truncated-nbp %d", length);
return;
}
length -= nbpHeaderSize;
if (length < 8) {
/* must be room for at least one tuple */
(void)printf(" truncated-nbp %d", length + nbpHeaderSize);
return;
}
/* ep points to end of available data */
ep = snapend;
if ((const u_char *)tp > ep) {
fputs(tstr, stdout);
return;
}
switch (i = np->control & 0xf0) {
case nbpBrRq:
case nbpLkUp:
(void)printf(i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:",
np->id);
if ((const u_char *)(tp + 1) > ep) {
fputs(tstr, stdout);
return;
}
(void)nbp_name_print(tp, ep);
/*
* look for anomalies: the spec says there can only
* be one tuple, the address must match the source
* address and the enumerator should be zero.
*/
if ((np->control & 0xf) != 1)
(void)printf(" [ntup=%d]", np->control & 0xf);
if (tp->enumerator)
(void)printf(" [enum=%d]", tp->enumerator);
if (EXTRACT_16BITS(&tp->net) != snet ||
tp->node != snode || tp->skt != skt)
(void)printf(" [addr=%s.%d]",
ataddr_string(EXTRACT_16BITS(&tp->net),
tp->node), tp->skt);
break;
case nbpLkUpReply:
(void)printf(" nbp-reply %d:", np->id);
/* print each of the tuples in the reply */
for (i = np->control & 0xf; --i >= 0 && tp; )
tp = nbp_tuple_print(tp, ep, snet, snode, skt);
break;
default:
(void)printf(" nbp-0x%x %d (%d)", np->control, np->id,
length);
break;
}
}
/* print a counted string */
static const char *
print_cstring(register const char *cp, register const u_char *ep)
{
register u_int length;
if (cp >= (const char *)ep) {
fputs(tstr, stdout);
return (0);
}
length = *cp++;
/* Spec says string can be at most 32 bytes long */
if (length > 32) {
(void)printf("[len=%u]", length);
return (0);
}
while ((int)--length >= 0) {
if (cp >= (const char *)ep) {
fputs(tstr, stdout);
return (0);
}
putchar(*cp++);
}
return (cp);
}
static const struct atNBPtuple *
nbp_tuple_print(register const struct atNBPtuple *tp,
register const u_char *ep,
register u_short snet, register u_char snode,
register u_char skt)
{
register const struct atNBPtuple *tpn;
if ((const u_char *)(tp + 1) > ep) {
fputs(tstr, stdout);
return 0;
}
tpn = nbp_name_print(tp, ep);
/* if the enumerator isn't 1, print it */
if (tp->enumerator != 1)
(void)printf("(%d)", tp->enumerator);
/* if the socket doesn't match the src socket, print it */
if (tp->skt != skt)
(void)printf(" %d", tp->skt);
/* if the address doesn't match the src address, it's an anomaly */
if (EXTRACT_16BITS(&tp->net) != snet || tp->node != snode)
(void)printf(" [addr=%s]",
ataddr_string(EXTRACT_16BITS(&tp->net), tp->node));
return (tpn);
}
static const struct atNBPtuple *
nbp_name_print(const struct atNBPtuple *tp, register const u_char *ep)
{
register const char *cp = (const char *)tp + nbpTupleSize;
putchar(' ');
/* Object */
putchar('"');
if ((cp = print_cstring(cp, ep)) != NULL) {
/* Type */
putchar(':');
if ((cp = print_cstring(cp, ep)) != NULL) {
/* Zone */
putchar('@');
if ((cp = print_cstring(cp, ep)) != NULL)
putchar('"');
}
}
return ((const struct atNBPtuple *)cp);
}
#define HASHNAMESIZE 4096
struct hnamemem {
int addr;
char *name;
struct hnamemem *nxt;
};
static struct hnamemem hnametable[HASHNAMESIZE];
static const char *
ataddr_string(u_short atnet, u_char athost)
{
register struct hnamemem *tp, *tp2;
register int i = (atnet << 8) | athost;
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[i3 & (HASHNAMESIZE-1)];
tp->nxt; tp = tp->nxt)
;
tp->addr = i3;
tp->nxt = newhnamemem();
tp->name = strdup(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 = strdup(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 = strdup(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));
}