/*
* 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 ([email protected]).
*/

/* \summary: Novell IPX printer */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-ipx.c,v 1.8 2024/09/02 16:15:31 christos Exp $");
#endif

#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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