NetBSD/usr.sbin/tcpdump/print-atalk.c

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/*
* Copyright (c) 1988-1990 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.
*
* $Id: print-atalk.c,v 1.1 1993/11/14 21:20:34 deraadt Exp $
*/
#ifndef lint
static char rcsid[] =
"@(#) Header: print-atalk.c,v 1.22 92/03/26 14:15:34 mccanne Exp (LBL)";
#endif
#ifdef __STDC__
#include <stdlib.h>
#endif
#include <stdio.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include "interface.h"
#include "addrtoname.h"
#include "appletalk.h"
#include <strings.h>
#include "extract.h"
static char *ataddr_string();
static struct atNBPtuple *nbp_tuple_print();
static struct atNBPtuple *nbp_name_print();
static void atp_print();
static void nbp_print();
static void atp_bitmap_print();
/*
* Print AppleTalk Datagram Delivery Protocol packets.
*/
void
ddp_print(dp, length)
register struct atDDP *dp;
int length;
{
if (length < ddpSize) {
(void)printf(" truncated-ddp %d", length);
return;
}
(void)printf("%s.%d > %s.%d:",
ataddr_string(EXTRACT_SHORT(&dp->srcNet), dp->srcNode),
dp->srcSkt,
ataddr_string(EXTRACT_SHORT(&dp->dstNet), dp->dstNode),
dp->dstSkt);
/* 'type' is the last field of 'dp' so we need the whole thing.
If we cannot determine the type, bail out. (This last byte
happens to be *one* byte past the end of tcpdump's minimum
snapshot length.) */
if ((u_char *)(dp + 1) > snapend) {
printf(" [|atalk]");
return;
}
length -= ddpSize;
switch (dp->type) {
case ddpRTMP:
(void)printf(" at-rtmp %d", length);
break;
case ddpRTMPrequest:
(void)printf(" at-rtmpReq %d", length);
break;
case ddpNBP:
nbp_print((struct atNBP *)((u_char *)dp + ddpSize),
length, dp);
break;
case ddpATP:
atp_print((struct atATP *)((u_char *)dp + ddpSize), length);
break;
case ddpECHO:
(void)printf(" at-echo %d", length);
break;
case ddpIP:
(void)printf(" at-IP %d", length);
break;
case ddpARP:
(void)printf(" at-ARP %d", length);
break;
case ddpKLAP:
(void)printf(" at-KLAP %d", length);
break;
default:
(void)printf(" at-#%d %d", length);
break;
}
}
static void
atp_print(ap, length)
register struct atATP *ap;
int length;
{
char c;
long data;
if ((u_char *)(ap + 1) > snapend) {
/* Just bail if we don't have the whole chunk. */
printf(" [|atalk]");
return;
}
length -= sizeof(*ap);
switch (ap->control & 0xc0) {
case atpReqCode:
(void)printf(" atp-req%s %d",
ap->control & atpXO? " " : "*",
EXTRACT_SHORT(&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_SHORT(&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_SHORT(&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_SHORT(&ap->transID), length);
break;
}
data = EXTRACT_LONG(&ap->userData);
if (data != 0)
(void)printf(" 0x%x", data);
}
static void
atp_bitmap_print(bm)
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(np, length, dp)
register struct atNBP *np;
int length;
register struct atDDP *dp;
{
register struct atNBPtuple *tp =
(struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
int i = length;
u_char *ep;
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 ((u_char *)tp > ep) {
printf(" [|atalk]");
return;
}
switch (i = np->control & 0xf0) {
case nbpBrRq:
case nbpLkUp:
(void)printf(i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:",
np->id);
if ((u_char *)(tp + 1) > ep) {
printf(" [|atalk]");
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_SHORT(&tp->net) != EXTRACT_SHORT(&dp->srcNet) ||
tp->node != dp->srcNode || tp->skt != dp->srcSkt)
(void)printf(" [addr=%s.%d]",
ataddr_string(EXTRACT_SHORT(&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, dp);
break;
default:
(void)printf(" nbp-0x%x %d (%d)", np->control, np->id,
length);
break;
}
}
/* print a counted string */
static char *
print_cstring(cp, ep)
register char *cp;
register u_char *ep;
{
register int length;
if (cp >= (char *)ep) {
(void)printf("[|atalk]");
return (0);
}
length = *cp++;
/* Spec says string can be at most 32 bytes long */
if (length < 0 || length > 32) {
(void)printf("[len=%d]", length);
return (0);
}
while (--length >= 0) {
if (cp >= (char *)ep) {
(void)printf("[|atalk]");
return (0);
}
putchar(*cp++);
}
return (cp);
}
static struct atNBPtuple *
nbp_tuple_print(tp, ep, dp)
register struct atNBPtuple *tp;
register u_char *ep;
register struct atDDP *dp;
{
register struct atNBPtuple *tpn;
if ((u_char *)(tp + 1) > ep) {
printf(" [|atalk]");
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 != dp->srcSkt)
(void)printf(" %d", tp->skt);
/* if the address doesn't match the src address, it's an anomaly */
if (EXTRACT_SHORT(&tp->net) != EXTRACT_SHORT(&dp->srcNet) ||
tp->node != dp->srcNode)
(void)printf(" [addr=%s]",
ataddr_string(EXTRACT_SHORT(&tp->net), tp->node));
return (tpn);
}
static struct atNBPtuple *
nbp_name_print(tp, ep)
struct atNBPtuple *tp;
register u_char *ep;
{
register char *cp = (char *)tp + nbpTupleSize;
putchar(' ');
/* Object */
putchar('"');
if (cp = print_cstring(cp, ep)) {
/* Type */
putchar(':');
if (cp = print_cstring(cp, ep)) {
/* Zone */
putchar('@');
if (cp = print_cstring(cp, ep))
putchar('"');
}
}
return ((struct atNBPtuple *)cp);
}
#define HASHNAMESIZE 4096
struct hnamemem {
int addr;
char *name;
struct hnamemem *nxt;
};
static struct hnamemem hnametable[HASHNAMESIZE];
static char *
ataddr_string(atnet, athost)
u_short atnet;
u_char athost;
{
register struct hnamemem *tp, *tp2;
register int i = (atnet << 8) | athost;
char nambuf[256];
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 %s", &i1, &i2, &i3,
nambuf) == 4)
/* got a hostname. */
i3 |= ((i1 << 8) | i2) << 8;
else if (sscanf(line, "%d.%d %s", &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 = (struct hnamemem *)calloc(1, sizeof(*tp));
i3 = strlen(nambuf) + 1;
tp->name = strcpy(malloc((unsigned) i3), 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 = (struct hnamemem *)calloc(1, sizeof(*tp));
(void)sprintf(nambuf, "%s.%d", tp2->name, athost);
i = strlen(nambuf) + 1;
tp->name = strcpy(malloc((unsigned) i), nambuf);
return (tp->name);
}
tp->addr = (atnet << 8) | athost;
tp->nxt = (struct hnamemem *)calloc(1, sizeof(*tp));
if (athost != 255)
(void)sprintf(nambuf, "%d.%d.%d",
atnet >> 8, atnet & 0xff, athost);
else
(void)sprintf(nambuf, "%d.%d", atnet >> 8, atnet & 0xff);
i = strlen(nambuf) + 1;
tp->name = strcpy(malloc((unsigned) i), nambuf);
return (tp->name);
}