/* $NetBSD: print-atalk.c,v 1.6 2004/09/27 23:04:24 dyoung Exp $ */ /* * 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. */ #include #ifndef lint #if 0 static const char rcsid[] _U_ = "@(#) Header: /tcpdump/master/tcpdump/print-atalk.c,v 1.78.2.2 2003/11/16 08:51:11 guy Exp (LBL)"; #else __RCSID("$NetBSD: print-atalk.c,v 1.6 2004/09/27 23:04:24 dyoung Exp $"); #endif #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #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 (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; 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)); }