241 lines
6.4 KiB
C
241 lines
6.4 KiB
C
/*
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* Copyright (c) 1994, 1995, 1996
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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 Novell IPX packets.
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* Contributed by Brad Parker (brad@fcr.com).
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*
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* $FreeBSD$
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*/
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#define NETDISSECT_REWORKED
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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 <tcpdump-stdinc.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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/* well-known sockets */
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#define IPX_SKT_NCP 0x0451
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#define IPX_SKT_SAP 0x0452
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#define IPX_SKT_RIP 0x0453
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#define IPX_SKT_NETBIOS 0x0455
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#define IPX_SKT_DIAGNOSTICS 0x0456
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#define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */
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#define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */
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/* IPX transport header */
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struct ipxHdr {
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uint16_t cksum; /* Checksum */
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uint16_t length; /* Length, in bytes, including header */
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uint8_t tCtl; /* Transport Control (i.e. hop count) */
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uint8_t pType; /* Packet Type (i.e. level 2 protocol) */
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uint16_t dstNet[2]; /* destination net */
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uint8_t dstNode[6]; /* destination node */
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uint16_t dstSkt; /* destination socket */
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uint16_t srcNet[2]; /* source net */
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uint8_t srcNode[6]; /* source node */
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uint16_t srcSkt; /* source socket */
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};
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#define ipxSize 30
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static const char *ipxaddr_string(uint32_t, const u_char *);
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static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int);
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static void ipx_sap_print(netdissect_options *, const u_short *, u_int);
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static void ipx_rip_print(netdissect_options *, const u_short *, u_int);
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/*
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* Print IPX datagram packets.
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*/
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void
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ipx_print(netdissect_options *ndo, const u_char *p, u_int length)
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{
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const struct ipxHdr *ipx = (const struct ipxHdr *)p;
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if (!ndo->ndo_eflag)
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ND_PRINT((ndo, "IPX "));
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ND_TCHECK(ipx->srcSkt);
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ND_PRINT((ndo, "%s.%04x > ",
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ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
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EXTRACT_16BITS(&ipx->srcSkt)));
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ND_PRINT((ndo, "%s.%04x: ",
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ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode),
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EXTRACT_16BITS(&ipx->dstSkt)));
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/* take length from ipx header */
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ND_TCHECK(ipx->length);
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length = EXTRACT_16BITS(&ipx->length);
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ipx_decode(ndo, ipx, (u_char *)ipx + ipxSize, length - ipxSize);
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return;
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trunc:
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ND_PRINT((ndo, "[|ipx %d]", length));
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}
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static const char *
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ipxaddr_string(uint32_t net, const u_char *node)
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{
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static char line[256];
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snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x",
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net, node[0], node[1], node[2], node[3], node[4], node[5]);
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return line;
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}
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static void
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ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length)
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{
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register u_short dstSkt;
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dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
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switch (dstSkt) {
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case IPX_SKT_NCP:
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ND_PRINT((ndo, "ipx-ncp %d", length));
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break;
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case IPX_SKT_SAP:
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ipx_sap_print(ndo, (u_short *)datap, length);
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break;
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case IPX_SKT_RIP:
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ipx_rip_print(ndo, (u_short *)datap, length);
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break;
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case IPX_SKT_NETBIOS:
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ND_PRINT((ndo, "ipx-netbios %d", length));
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#ifdef TCPDUMP_DO_SMB
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ipx_netbios_print(ndo, datap, length);
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#endif
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break;
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case IPX_SKT_DIAGNOSTICS:
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ND_PRINT((ndo, "ipx-diags %d", length));
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break;
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case IPX_SKT_NWLINK_DGM:
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ND_PRINT((ndo, "ipx-nwlink-dgm %d", length));
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#ifdef TCPDUMP_DO_SMB
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ipx_netbios_print(ndo, datap, length);
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#endif
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break;
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case IPX_SKT_EIGRP:
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eigrp_print(ndo, datap, length);
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break;
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default:
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ND_PRINT((ndo, "ipx-#%x %d", dstSkt, length));
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break;
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}
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}
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static void
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ipx_sap_print(netdissect_options *ndo, const u_short *ipx, u_int length)
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{
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int command, i;
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ND_TCHECK(ipx[0]);
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command = EXTRACT_16BITS(ipx);
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ipx++;
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length -= 2;
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switch (command) {
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case 1:
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case 3:
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if (command == 1)
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ND_PRINT((ndo, "ipx-sap-req"));
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else
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ND_PRINT((ndo, "ipx-sap-nearest-req"));
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ND_TCHECK(ipx[0]);
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ND_PRINT((ndo, " %s", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0])))));
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break;
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case 2:
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case 4:
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if (command == 2)
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ND_PRINT((ndo, "ipx-sap-resp"));
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else
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ND_PRINT((ndo, "ipx-sap-nearest-resp"));
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for (i = 0; i < 8 && length > 0; i++) {
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ND_TCHECK(ipx[0]);
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ND_PRINT((ndo, " %s '", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0])))));
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if (fn_printzp(ndo, (u_char *)&ipx[1], 48, ndo->ndo_snapend)) {
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ND_PRINT((ndo, "'"));
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goto trunc;
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}
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ND_TCHECK2(ipx[25], 10);
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ND_PRINT((ndo, "' addr %s",
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ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27])));
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ipx += 32;
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length -= 64;
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}
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break;
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default:
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ND_PRINT((ndo, "ipx-sap-?%x", command));
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break;
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}
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return;
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trunc:
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ND_PRINT((ndo, "[|ipx %d]", length));
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}
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static void
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ipx_rip_print(netdissect_options *ndo, const u_short *ipx, u_int length)
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{
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int command, i;
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ND_TCHECK(ipx[0]);
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command = EXTRACT_16BITS(ipx);
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ipx++;
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length -= 2;
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switch (command) {
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case 1:
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ND_PRINT((ndo, "ipx-rip-req"));
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if (length > 0) {
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ND_TCHECK(ipx[3]);
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ND_PRINT((ndo, " %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
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EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3])));
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}
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break;
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case 2:
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ND_PRINT((ndo, "ipx-rip-resp"));
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for (i = 0; i < 50 && length > 0; i++) {
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ND_TCHECK(ipx[3]);
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ND_PRINT((ndo, " %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
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EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3])));
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ipx += 4;
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length -= 8;
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}
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break;
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default:
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ND_PRINT((ndo, "ipx-rip-?%x", command));
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break;
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}
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return;
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trunc:
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ND_PRINT((ndo, "[|ipx %d]", length));
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}
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