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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.
- */
- #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);
- }
-