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/*
* Copyright (c) 1994, 1995, 1996
* 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.
*
* Contributed by Brad Parker (brad@fcr.com).
*/
/* \summary: Novell IPX printer */
#include <config.h>
#include "netdissect-stdinc.h"
#include <stdio.h>
#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
/* well-known sockets */
#define IPX_SKT_NCP 0x0451
#define IPX_SKT_SAP 0x0452
#define IPX_SKT_RIP 0x0453
#define IPX_SKT_NETBIOS 0x0455
#define IPX_SKT_DIAGNOSTICS 0x0456
#define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */
#define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */
/* IPX transport header */
struct ipxHdr {
nd_uint16_t cksum; /* Checksum */
nd_uint16_t length; /* Length, in bytes, including header */
nd_uint8_t tCtl; /* Transport Control (i.e. hop count) */
nd_uint8_t pType; /* Packet Type (i.e. level 2 protocol) */
nd_uint32_t dstNet; /* destination net */
nd_mac_addr dstNode; /* destination node */
nd_uint16_t dstSkt; /* destination socket */
nd_uint32_t srcNet; /* source net */
nd_mac_addr srcNode; /* source node */
nd_uint16_t srcSkt; /* source socket */
};
#define ipxSize 30
static const char *ipxaddr_string(netdissect_options *, uint32_t, const u_char *);
static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int);
static void ipx_sap_print(netdissect_options *, const u_char *, u_int);
static void ipx_rip_print(netdissect_options *, const u_char *, u_int);
/*
* Print IPX datagram packets.
*/
void
ipx_print(netdissect_options *ndo, const u_char *p, u_int length)
{
const struct ipxHdr *ipx = (const struct ipxHdr *)p;
ndo->ndo_protocol = "ipx";
if (!ndo->ndo_eflag)
ND_PRINT("IPX ");
ND_PRINT("%s.%04x > ",
ipxaddr_string(ndo, GET_BE_U_4(ipx->srcNet), ipx->srcNode),
GET_BE_U_2(ipx->srcSkt));
ND_PRINT("%s.%04x: ",
ipxaddr_string(ndo, GET_BE_U_4(ipx->dstNet), ipx->dstNode),
GET_BE_U_2(ipx->dstSkt));
/* take length from ipx header */
length = GET_BE_U_2(ipx->length);
if (length < ipxSize) {
ND_PRINT("[length %u < %u]", length, ipxSize);
nd_print_invalid(ndo);
return;
}
ipx_decode(ndo, ipx, p + ipxSize, length - ipxSize);
}
static const char *
ipxaddr_string(netdissect_options *ndo, uint32_t net, const u_char *node)
{
static char line[256];
snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x",
net, GET_U_1(node), GET_U_1(node + 1),
GET_U_1(node + 2), GET_U_1(node + 3),
GET_U_1(node + 4), GET_U_1(node + 5));
return line;
}
static void
ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length)
{
u_short dstSkt;
dstSkt = GET_BE_U_2(ipx->dstSkt);
switch (dstSkt) {
case IPX_SKT_NCP:
ND_PRINT("ipx-ncp %u", length);
break;
case IPX_SKT_SAP:
ipx_sap_print(ndo, datap, length);
break;
case IPX_SKT_RIP:
ipx_rip_print(ndo, datap, length);
break;
case IPX_SKT_NETBIOS:
ND_PRINT("ipx-netbios %u", length);
#ifdef ENABLE_SMB
ipx_netbios_print(ndo, datap, length);
#endif
break;
case IPX_SKT_DIAGNOSTICS:
ND_PRINT("ipx-diags %u", length);
break;
case IPX_SKT_NWLINK_DGM:
ND_PRINT("ipx-nwlink-dgm %u", length);
#ifdef ENABLE_SMB
ipx_netbios_print(ndo, datap, length);
#endif
break;
case IPX_SKT_EIGRP:
eigrp_print(ndo, datap, length);
break;
default:
ND_PRINT("ipx-#%x %u", dstSkt, length);
break;
}
}
static void
ipx_sap_print(netdissect_options *ndo, const u_char *ipx, u_int length)
{
int command, i;
command = GET_BE_U_2(ipx);
ND_ICHECK_U(length, <, 2);
ipx += 2;
length -= 2;
switch (command) {
case 1:
case 3:
if (command == 1)
ND_PRINT("ipx-sap-req");
else
ND_PRINT("ipx-sap-nearest-req");
ND_PRINT(" %s", ipxsap_string(ndo, htons(GET_BE_U_2(ipx))));
break;
case 2:
case 4:
if (command == 2)
ND_PRINT("ipx-sap-resp");
else
ND_PRINT("ipx-sap-nearest-resp");
for (i = 0; i < 8 && length != 0; i++) {
ND_TCHECK_2(ipx);
if (length < 2)
goto invalid;
ND_PRINT(" %s '", ipxsap_string(ndo, htons(GET_BE_U_2(ipx))));
ipx += 2;
length -= 2;
if (length < 48) {
ND_PRINT("'");
goto invalid;
}
nd_printjnp(ndo, ipx, 48);
ND_PRINT("'");
ipx += 48;
length -= 48;
/*
* 10 bytes of IPX address.
*/
ND_TCHECK_LEN(ipx, 10);
if (length < 10)
goto invalid;
ND_PRINT(" addr %s",
ipxaddr_string(ndo, GET_BE_U_4(ipx), ipx + 4));
ipx += 10;
length -= 10;
/*
* 2 bytes of socket and 2 bytes of number of intermediate
* networks.
*/
ND_TCHECK_4(ipx);
if (length < 4)
goto invalid;
ipx += 4;
length -= 4;
}
break;
default:
ND_PRINT("ipx-sap-?%x", command);
break;
}
return;
invalid:
nd_print_invalid(ndo);
}
static void
ipx_rip_print(netdissect_options *ndo, const u_char *ipx, u_int length)
{
int command, i;
command = GET_BE_U_2(ipx);
ND_ICHECK_U(length, <, 2);
ipx += 2;
length -= 2;
switch (command) {
case 1:
ND_PRINT("ipx-rip-req");
if (length != 0) {
if (length < 8)
goto invalid;
ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx),
GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6));
}
break;
case 2:
ND_PRINT("ipx-rip-resp");
for (i = 0; i < 50 && length != 0; i++) {
if (length < 8)
goto invalid;
ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx),
GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6));
ipx += 8;
length -= 8;
}
break;
default:
ND_PRINT("ipx-rip-?%x", command);
break;
}
return;
invalid:
nd_print_invalid(ndo);
}
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