1188 lines
35 KiB
C
1188 lines
35 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
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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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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: print-decnet.c,v 1.11 2023/08/17 20:19:40 christos Exp $");
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#endif
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/* \summary: DECnet printer */
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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 "netdissect-stdinc.h"
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#include <stdio.h>
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#include <stdlib.h>
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#define ND_LONGJMP_FROM_TCHECK
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#include "netdissect.h"
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#include "extract.h"
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#include "addrtoname.h"
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#ifndef _WIN32
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typedef nd_uint8_t byte; /* single byte field */
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#else
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/*
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* the keyword 'byte' generates conflicts in Windows
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*/
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typedef nd_uint8_t Byte; /* single byte field */
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#define byte Byte
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#endif /* _WIN32 */
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typedef nd_uint16_t word; /* 2 byte field */
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typedef nd_uint32_t longword; /* 4 bytes field */
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/*
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* Definitions for DECNET Phase IV protocol headers
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*/
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typedef union {
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nd_mac_addr dne_addr; /* full Ethernet address */
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struct {
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nd_byte dne_hiord[4]; /* DECnet HIORD prefix */
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nd_byte dne_nodeaddr[2]; /* DECnet node address */
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} dne_remote;
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} etheraddr; /* Ethernet address */
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#define HIORD 0x000400aa /* high 32-bits of address (swapped) */
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#define AREAMASK 0176000 /* mask for area field */
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#define AREASHIFT 10 /* bit-offset for area field */
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#define NODEMASK 01777 /* mask for node address field */
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/*
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* Define long and short header formats.
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*/
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struct shorthdr
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{
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byte sh_flags; /* route flags */
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word sh_dst; /* destination node address */
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word sh_src; /* source node address */
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byte sh_visits; /* visit count */
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};
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struct longhdr
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{
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byte lg_flags; /* route flags */
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byte lg_darea; /* destination area (reserved) */
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byte lg_dsarea; /* destination subarea (reserved) */
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etheraddr lg_dst; /* destination id */
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byte lg_sarea; /* source area (reserved) */
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byte lg_ssarea; /* source subarea (reserved) */
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etheraddr lg_src; /* source id */
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byte lg_nextl2; /* next level 2 router (reserved) */
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byte lg_visits; /* visit count */
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byte lg_service; /* service class (reserved) */
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byte lg_pt; /* protocol type (reserved) */
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};
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union routehdr
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{
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struct shorthdr rh_short; /* short route header */
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struct longhdr rh_long; /* long route header */
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};
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/*
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* Define the values of various fields in the protocol messages.
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*
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* 1. Data packet formats.
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*/
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#define RMF_MASK 7 /* mask for message type */
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#define RMF_SHORT 2 /* short message format */
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#define RMF_LONG 6 /* long message format */
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#ifndef RMF_RQR
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#define RMF_RQR 010 /* request return to sender */
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#define RMF_RTS 020 /* returning to sender */
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#define RMF_IE 040 /* intra-ethernet packet */
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#endif /* RMR_RQR */
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#define RMF_FVER 0100 /* future version flag */
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#define RMF_PAD 0200 /* pad field */
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#define RMF_PADMASK 0177 /* pad field mask */
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#define VIS_MASK 077 /* visit field mask */
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/*
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* 2. Control packet formats.
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*/
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#define RMF_CTLMASK 017 /* mask for message type */
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#define RMF_CTLMSG 01 /* control message indicator */
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#define RMF_INIT 01 /* initialization message */
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#define RMF_VER 03 /* verification message */
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#define RMF_TEST 05 /* hello and test message */
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#define RMF_L1ROUT 07 /* level 1 routing message */
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#define RMF_L2ROUT 011 /* level 2 routing message */
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#define RMF_RHELLO 013 /* router hello message */
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#define RMF_EHELLO 015 /* endnode hello message */
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#define TI_L2ROUT 01 /* level 2 router */
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#define TI_L1ROUT 02 /* level 1 router */
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#define TI_ENDNODE 03 /* endnode */
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#define TI_VERIF 04 /* verification required */
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#define TI_BLOCK 010 /* blocking requested */
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#define VE_VERS 2 /* version number (2) */
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#define VE_ECO 0 /* ECO number */
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#define VE_UECO 0 /* user ECO number (0) */
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#define P3_VERS 1 /* phase III version number (1) */
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#define P3_ECO 3 /* ECO number (3) */
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#define P3_UECO 0 /* user ECO number (0) */
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#define II_L2ROUT 01 /* level 2 router */
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#define II_L1ROUT 02 /* level 1 router */
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#define II_ENDNODE 03 /* endnode */
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#define II_VERIF 04 /* verification required */
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#define II_NOMCAST 040 /* no multicast traffic accepted */
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#define II_BLOCK 0100 /* blocking requested */
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#define II_TYPEMASK 03 /* mask for node type */
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#define TESTDATA 0252 /* test data bytes */
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#define TESTLEN 1 /* length of transmitted test data */
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/*
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* Define control message formats.
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*/
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struct initmsg /* initialization message */
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{
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byte in_flags; /* route flags */
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word in_src; /* source node address */
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byte in_info; /* routing layer information */
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word in_blksize; /* maximum data link block size */
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byte in_vers; /* version number */
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byte in_eco; /* ECO number */
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byte in_ueco; /* user ECO number */
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word in_hello; /* hello timer */
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byte in_rsvd; /* reserved image field */
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};
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struct verifmsg /* verification message */
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{
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byte ve_flags; /* route flags */
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word ve_src; /* source node address */
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byte ve_fcnval; /* function value image field */
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};
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struct testmsg /* hello and test message */
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{
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byte te_flags; /* route flags */
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word te_src; /* source node address */
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byte te_data; /* test data image field */
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};
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struct l1rout /* level 1 routing message */
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{
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byte r1_flags; /* route flags */
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word r1_src; /* source node address */
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byte r1_rsvd; /* reserved field */
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};
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struct l2rout /* level 2 routing message */
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{
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byte r2_flags; /* route flags */
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word r2_src; /* source node address */
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byte r2_rsvd; /* reserved field */
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};
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struct rhellomsg /* router hello message */
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{
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byte rh_flags; /* route flags */
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byte rh_vers; /* version number */
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byte rh_eco; /* ECO number */
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byte rh_ueco; /* user ECO number */
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etheraddr rh_src; /* source id */
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byte rh_info; /* routing layer information */
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word rh_blksize; /* maximum data link block size */
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byte rh_priority; /* router's priority */
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byte rh_area; /* reserved */
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word rh_hello; /* hello timer */
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byte rh_mpd; /* reserved */
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};
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struct ehellomsg /* endnode hello message */
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{
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byte eh_flags; /* route flags */
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byte eh_vers; /* version number */
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byte eh_eco; /* ECO number */
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byte eh_ueco; /* user ECO number */
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etheraddr eh_src; /* source id */
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byte eh_info; /* routing layer information */
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word eh_blksize; /* maximum data link block size */
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byte eh_area; /* area (reserved) */
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byte eh_seed[8]; /* verification seed */
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etheraddr eh_router; /* designated router */
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word eh_hello; /* hello timer */
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byte eh_mpd; /* (reserved) */
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byte eh_data; /* test data image field */
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};
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union controlmsg
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{
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struct initmsg cm_init; /* initialization message */
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struct verifmsg cm_ver; /* verification message */
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struct testmsg cm_test; /* hello and test message */
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struct l1rout cm_l1rou; /* level 1 routing message */
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struct l2rout cm_l2rout; /* level 2 routing message */
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struct rhellomsg cm_rhello; /* router hello message */
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struct ehellomsg cm_ehello; /* endnode hello message */
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};
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/* Macros for decoding routing-info fields */
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#define RI_COST(x) ((x)&0777)
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#define RI_HOPS(x) (((x)>>10)&037)
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/*
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* NSP protocol fields and values.
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*/
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#define NSP_TYPEMASK 014 /* mask to isolate type code */
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#define NSP_SUBMASK 0160 /* mask to isolate subtype code */
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#define NSP_SUBSHFT 4 /* shift to move subtype code */
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#define MFT_DATA 0 /* data message */
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#define MFT_ACK 04 /* acknowledgement message */
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#define MFT_CTL 010 /* control message */
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#define MFS_ILS 020 /* data or I/LS indicator */
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#define MFS_BOM 040 /* beginning of message (data) */
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#define MFS_MOM 0 /* middle of message (data) */
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#define MFS_EOM 0100 /* end of message (data) */
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#define MFS_INT 040 /* interrupt message */
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#define MFS_DACK 0 /* data acknowledgement */
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#define MFS_IACK 020 /* I/LS acknowledgement */
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#define MFS_CACK 040 /* connect acknowledgement */
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#define MFS_NOP 0 /* no operation */
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#define MFS_CI 020 /* connect initiate */
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#define MFS_CC 040 /* connect confirm */
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#define MFS_DI 060 /* disconnect initiate */
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#define MFS_DC 0100 /* disconnect confirm */
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#define MFS_RCI 0140 /* retransmitted connect initiate */
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#define SGQ_ACK 0100000 /* ack */
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#define SGQ_NAK 0110000 /* negative ack */
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#define SGQ_OACK 0120000 /* other channel ack */
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#define SGQ_ONAK 0130000 /* other channel negative ack */
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#define SGQ_MASK 07777 /* mask to isolate seq # */
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#define SGQ_OTHER 020000 /* other channel qualifier */
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#define SGQ_DELAY 010000 /* ack delay flag */
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#define SGQ_EOM 0100000 /* pseudo flag for end-of-message */
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#define LSM_MASK 03 /* mask for modifier field */
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#define LSM_NOCHANGE 0 /* no change */
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#define LSM_DONOTSEND 1 /* do not send data */
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#define LSM_SEND 2 /* send data */
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#define LSI_MASK 014 /* mask for interpretation field */
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#define LSI_DATA 0 /* data segment or message count */
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#define LSI_INTR 4 /* interrupt request count */
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#define LSI_INTM 0377 /* funny marker for int. message */
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#define COS_MASK 014 /* mask for flow control field */
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#define COS_NONE 0 /* no flow control */
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#define COS_SEGMENT 04 /* segment flow control */
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#define COS_MESSAGE 010 /* message flow control */
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#define COS_DEFAULT 1 /* default value for field */
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#define COI_MASK 3 /* mask for version field */
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#define COI_32 0 /* version 3.2 */
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#define COI_31 1 /* version 3.1 */
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#define COI_40 2 /* version 4.0 */
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#define COI_41 3 /* version 4.1 */
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#define MNU_MASK 140 /* mask for session control version */
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#define MNU_10 000 /* session V1.0 */
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#define MNU_20 040 /* session V2.0 */
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#define MNU_ACCESS 1 /* access control present */
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#define MNU_USRDATA 2 /* user data field present */
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#define MNU_INVKPROXY 4 /* invoke proxy field present */
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#define MNU_UICPROXY 8 /* use uic-based proxy */
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#define DC_NORESOURCES 1 /* no resource reason code */
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#define DC_NOLINK 41 /* no link terminate reason code */
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#define DC_COMPLETE 42 /* disconnect complete reason code */
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#define DI_NOERROR 0 /* user disconnect */
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#define DI_SHUT 3 /* node is shutting down */
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#define DI_NOUSER 4 /* destination end user does not exist */
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#define DI_INVDEST 5 /* invalid end user destination */
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#define DI_REMRESRC 6 /* insufficient remote resources */
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#define DI_TPA 8 /* third party abort */
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#define DI_PROTOCOL 7 /* protocol error discovered */
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#define DI_ABORT 9 /* user abort */
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#define DI_LOCALRESRC 32 /* insufficient local resources */
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#define DI_REMUSERRESRC 33 /* insufficient remote user resources */
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#define DI_BADACCESS 34 /* bad access control information */
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#define DI_BADACCNT 36 /* bad ACCOUNT information */
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#define DI_CONNECTABORT 38 /* connect request cancelled */
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#define DI_TIMEDOUT 38 /* remote node or user crashed */
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#define DI_UNREACHABLE 39 /* local timers expired due to ... */
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#define DI_BADIMAGE 43 /* bad image data in connect */
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#define DI_SERVMISMATCH 54 /* cryptographic service mismatch */
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#define UC_OBJREJECT 0 /* object rejected connect */
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#define UC_USERDISCONNECT 0 /* user disconnect */
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#define UC_RESOURCES 1 /* insufficient resources (local or remote) */
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#define UC_NOSUCHNODE 2 /* unrecognized node name */
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#define UC_REMOTESHUT 3 /* remote node shutting down */
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#define UC_NOSUCHOBJ 4 /* unrecognized object */
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#define UC_INVOBJFORMAT 5 /* invalid object name format */
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#define UC_OBJTOOBUSY 6 /* object too busy */
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#define UC_NETWORKABORT 8 /* network abort */
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#define UC_USERABORT 9 /* user abort */
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#define UC_INVNODEFORMAT 10 /* invalid node name format */
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#define UC_LOCALSHUT 11 /* local node shutting down */
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#define UC_ACCESSREJECT 34 /* invalid access control information */
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#define UC_NORESPONSE 38 /* no response from object */
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#define UC_UNREACHABLE 39 /* node unreachable */
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/*
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* NSP message formats.
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*/
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struct nsphdr /* general nsp header */
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{
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byte nh_flags; /* message flags */
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word nh_dst; /* destination link address */
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word nh_src; /* source link address */
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};
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struct seghdr /* data segment header */
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{
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byte sh_flags; /* message flags */
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word sh_dst; /* destination link address */
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word sh_src; /* source link address */
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word sh_seq[3]; /* sequence numbers */
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};
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struct minseghdr /* minimum data segment header */
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{
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byte ms_flags; /* message flags */
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word ms_dst; /* destination link address */
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word ms_src; /* source link address */
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word ms_seq; /* sequence number */
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};
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struct lsmsg /* link service message (after hdr) */
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{
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byte ls_lsflags; /* link service flags */
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byte ls_fcval; /* flow control value */
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};
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struct ackmsg /* acknowledgement message */
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{
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byte ak_flags; /* message flags */
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word ak_dst; /* destination link address */
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word ak_src; /* source link address */
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word ak_acknum[2]; /* acknowledgement numbers */
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};
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struct minackmsg /* minimum acknowledgement message */
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{
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byte mk_flags; /* message flags */
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word mk_dst; /* destination link address */
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word mk_src; /* source link address */
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word mk_acknum; /* acknowledgement number */
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};
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struct ciackmsg /* connect acknowledgement message */
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{
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byte ck_flags; /* message flags */
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word ck_dst; /* destination link address */
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};
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struct cimsg /* connect initiate message */
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{
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byte ci_flags; /* message flags */
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word ci_dst; /* destination link address (0) */
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word ci_src; /* source link address */
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byte ci_services; /* requested services */
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byte ci_info; /* information */
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word ci_segsize; /* maximum segment size */
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};
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struct ccmsg /* connect confirm message */
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{
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byte cc_flags; /* message flags */
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word cc_dst; /* destination link address */
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word cc_src; /* source link address */
|
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byte cc_services; /* requested services */
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byte cc_info; /* information */
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word cc_segsize; /* maximum segment size */
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byte cc_optlen; /* optional data length */
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};
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struct cnmsg /* generic connect message */
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{
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byte cn_flags; /* message flags */
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word cn_dst; /* destination link address */
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word cn_src; /* source link address */
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byte cn_services; /* requested services */
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byte cn_info; /* information */
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word cn_segsize; /* maximum segment size */
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};
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struct dimsg /* disconnect initiate message */
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{
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byte di_flags; /* message flags */
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word di_dst; /* destination link address */
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word di_src; /* source link address */
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word di_reason; /* reason code */
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byte di_optlen; /* optional data length */
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};
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struct dcmsg /* disconnect confirm message */
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{
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byte dc_flags; /* message flags */
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word dc_dst; /* destination link address */
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word dc_src; /* source link address */
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word dc_reason; /* reason code */
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};
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/* Forwards */
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static int print_decnet_ctlmsg(netdissect_options *, const union routehdr *, u_int, u_int);
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static void print_t_info(netdissect_options *, u_int);
|
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static void print_l1_routes(netdissect_options *, const u_char *, u_int);
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static void print_l2_routes(netdissect_options *, const u_char *, u_int);
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static void print_i_info(netdissect_options *, u_int);
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static void print_elist(const u_char *, u_int);
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|
static int print_nsp(netdissect_options *, const u_char *, u_int);
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|
static void print_reason(netdissect_options *, u_int);
|
|
|
|
void
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decnet_print(netdissect_options *ndo,
|
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const u_char *ap, u_int length,
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u_int caplen)
|
|
{
|
|
const union routehdr *rhp;
|
|
u_int mflags;
|
|
uint16_t dst, src;
|
|
u_int hops;
|
|
u_int nsplen, pktlen;
|
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const u_char *nspp;
|
|
|
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ndo->ndo_protocol = "decnet";
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if (length < sizeof(struct shorthdr)) {
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ND_PRINT(" (length %u < %zu)", length, sizeof(struct shorthdr));
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|
goto invalid;
|
|
}
|
|
|
|
pktlen = GET_LE_U_2(ap);
|
|
if (pktlen < sizeof(struct shorthdr)) {
|
|
ND_PRINT(" (pktlen %u < %zu)", pktlen, sizeof(struct shorthdr));
|
|
goto invalid;
|
|
}
|
|
if (pktlen > length) {
|
|
ND_PRINT(" (pktlen %u > %u)", pktlen, length);
|
|
goto invalid;
|
|
}
|
|
length = pktlen;
|
|
|
|
rhp = (const union routehdr *)(ap + sizeof(short));
|
|
mflags = GET_U_1(rhp->rh_short.sh_flags);
|
|
|
|
if (mflags & RMF_PAD) {
|
|
/* pad bytes of some sort in front of message */
|
|
u_int padlen = mflags & RMF_PADMASK;
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT("[pad:%u] ", padlen);
|
|
if (length < padlen + 2) {
|
|
ND_PRINT(" (length %u < %u)", length, padlen + 2);
|
|
goto invalid;
|
|
}
|
|
ND_TCHECK_LEN(ap + sizeof(short), padlen);
|
|
ap += padlen;
|
|
length -= padlen;
|
|
caplen -= padlen;
|
|
rhp = (const union routehdr *)(ap + sizeof(short));
|
|
mflags = GET_U_1(rhp->rh_short.sh_flags);
|
|
}
|
|
|
|
if (mflags & RMF_FVER) {
|
|
ND_PRINT("future-version-decnet");
|
|
ND_DEFAULTPRINT(ap, ND_MIN(length, caplen));
|
|
return;
|
|
}
|
|
|
|
/* is it a control message? */
|
|
if (mflags & RMF_CTLMSG) {
|
|
if (!print_decnet_ctlmsg(ndo, rhp, length, caplen))
|
|
goto invalid;
|
|
return;
|
|
}
|
|
|
|
switch (mflags & RMF_MASK) {
|
|
case RMF_LONG:
|
|
if (length < sizeof(struct longhdr)) {
|
|
ND_PRINT(" (length %u < %zu)", length, sizeof(struct longhdr));
|
|
goto invalid;
|
|
}
|
|
ND_TCHECK_SIZE(&rhp->rh_long);
|
|
dst =
|
|
GET_LE_U_2(rhp->rh_long.lg_dst.dne_remote.dne_nodeaddr);
|
|
src =
|
|
GET_LE_U_2(rhp->rh_long.lg_src.dne_remote.dne_nodeaddr);
|
|
hops = GET_U_1(rhp->rh_long.lg_visits);
|
|
nspp = ap + sizeof(short) + sizeof(struct longhdr);
|
|
nsplen = length - sizeof(struct longhdr);
|
|
break;
|
|
case RMF_SHORT:
|
|
dst = GET_LE_U_2(rhp->rh_short.sh_dst);
|
|
src = GET_LE_U_2(rhp->rh_short.sh_src);
|
|
hops = (GET_U_1(rhp->rh_short.sh_visits) & VIS_MASK)+1;
|
|
nspp = ap + sizeof(short) + sizeof(struct shorthdr);
|
|
nsplen = length - sizeof(struct shorthdr);
|
|
break;
|
|
default:
|
|
ND_PRINT("unknown message flags under mask");
|
|
ND_DEFAULTPRINT((const u_char *)ap, ND_MIN(length, caplen));
|
|
return;
|
|
}
|
|
|
|
ND_PRINT("%s > %s %u ",
|
|
dnaddr_string(ndo, src), dnaddr_string(ndo, dst), pktlen);
|
|
if (ndo->ndo_vflag) {
|
|
if (mflags & RMF_RQR)
|
|
ND_PRINT("RQR ");
|
|
if (mflags & RMF_RTS)
|
|
ND_PRINT("RTS ");
|
|
if (mflags & RMF_IE)
|
|
ND_PRINT("IE ");
|
|
ND_PRINT("%u hops ", hops);
|
|
}
|
|
|
|
if (!print_nsp(ndo, nspp, nsplen))
|
|
goto invalid;
|
|
return;
|
|
|
|
invalid:
|
|
nd_print_invalid(ndo);
|
|
}
|
|
|
|
static int
|
|
print_decnet_ctlmsg(netdissect_options *ndo,
|
|
const union routehdr *rhp, u_int length,
|
|
u_int caplen)
|
|
{
|
|
/* Our caller has already checked for mflags */
|
|
u_int mflags = GET_U_1(rhp->rh_short.sh_flags);
|
|
const union controlmsg *cmp = (const union controlmsg *)rhp;
|
|
uint16_t src, dst;
|
|
u_int info, blksize, eco, ueco, hello, other, vers;
|
|
u_int priority;
|
|
const u_char *rhpx = (const u_char *)rhp;
|
|
|
|
switch (mflags & RMF_CTLMASK) {
|
|
case RMF_INIT:
|
|
ND_PRINT("init ");
|
|
if (length < sizeof(struct initmsg))
|
|
goto invalid;
|
|
ND_TCHECK_SIZE(&cmp->cm_init);
|
|
src = GET_LE_U_2(cmp->cm_init.in_src);
|
|
info = GET_U_1(cmp->cm_init.in_info);
|
|
blksize = GET_LE_U_2(cmp->cm_init.in_blksize);
|
|
vers = GET_U_1(cmp->cm_init.in_vers);
|
|
eco = GET_U_1(cmp->cm_init.in_eco);
|
|
ueco = GET_U_1(cmp->cm_init.in_ueco);
|
|
hello = GET_LE_U_2(cmp->cm_init.in_hello);
|
|
print_t_info(ndo, info);
|
|
ND_PRINT("src %sblksize %u vers %u eco %u ueco %u hello %u",
|
|
dnaddr_string(ndo, src), blksize, vers, eco, ueco,
|
|
hello);
|
|
break;
|
|
case RMF_VER:
|
|
ND_PRINT("verification ");
|
|
if (length < sizeof(struct verifmsg))
|
|
goto invalid;
|
|
src = GET_LE_U_2(cmp->cm_ver.ve_src);
|
|
other = GET_U_1(cmp->cm_ver.ve_fcnval);
|
|
ND_PRINT("src %s fcnval %o", dnaddr_string(ndo, src), other);
|
|
break;
|
|
case RMF_TEST:
|
|
ND_PRINT("test ");
|
|
if (length < sizeof(struct testmsg))
|
|
goto invalid;
|
|
src = GET_LE_U_2(cmp->cm_test.te_src);
|
|
other = GET_U_1(cmp->cm_test.te_data);
|
|
ND_PRINT("src %s data %o", dnaddr_string(ndo, src), other);
|
|
break;
|
|
case RMF_L1ROUT:
|
|
ND_PRINT("lev-1-routing ");
|
|
if (length < sizeof(struct l1rout))
|
|
goto invalid;
|
|
ND_TCHECK_SIZE(&cmp->cm_l1rou);
|
|
src = GET_LE_U_2(cmp->cm_l1rou.r1_src);
|
|
ND_PRINT("src %s ", dnaddr_string(ndo, src));
|
|
print_l1_routes(ndo, &(rhpx[sizeof(struct l1rout)]),
|
|
length - sizeof(struct l1rout));
|
|
break;
|
|
case RMF_L2ROUT:
|
|
ND_PRINT("lev-2-routing ");
|
|
if (length < sizeof(struct l2rout))
|
|
goto invalid;
|
|
ND_TCHECK_SIZE(&cmp->cm_l2rout);
|
|
src = GET_LE_U_2(cmp->cm_l2rout.r2_src);
|
|
ND_PRINT("src %s ", dnaddr_string(ndo, src));
|
|
print_l2_routes(ndo, &(rhpx[sizeof(struct l2rout)]),
|
|
length - sizeof(struct l2rout));
|
|
break;
|
|
case RMF_RHELLO:
|
|
ND_PRINT("router-hello ");
|
|
if (length < sizeof(struct rhellomsg))
|
|
goto invalid;
|
|
ND_TCHECK_SIZE(&cmp->cm_rhello);
|
|
vers = GET_U_1(cmp->cm_rhello.rh_vers);
|
|
eco = GET_U_1(cmp->cm_rhello.rh_eco);
|
|
ueco = GET_U_1(cmp->cm_rhello.rh_ueco);
|
|
src =
|
|
GET_LE_U_2(cmp->cm_rhello.rh_src.dne_remote.dne_nodeaddr);
|
|
info = GET_U_1(cmp->cm_rhello.rh_info);
|
|
blksize = GET_LE_U_2(cmp->cm_rhello.rh_blksize);
|
|
priority = GET_U_1(cmp->cm_rhello.rh_priority);
|
|
hello = GET_LE_U_2(cmp->cm_rhello.rh_hello);
|
|
print_i_info(ndo, info);
|
|
ND_PRINT("vers %u eco %u ueco %u src %s blksize %u pri %u hello %u",
|
|
vers, eco, ueco, dnaddr_string(ndo, src),
|
|
blksize, priority, hello);
|
|
print_elist(&(rhpx[sizeof(struct rhellomsg)]),
|
|
length - sizeof(struct rhellomsg));
|
|
break;
|
|
case RMF_EHELLO:
|
|
ND_PRINT("endnode-hello ");
|
|
if (length < sizeof(struct ehellomsg))
|
|
goto invalid;
|
|
vers = GET_U_1(cmp->cm_ehello.eh_vers);
|
|
eco = GET_U_1(cmp->cm_ehello.eh_eco);
|
|
ueco = GET_U_1(cmp->cm_ehello.eh_ueco);
|
|
src =
|
|
GET_LE_U_2(cmp->cm_ehello.eh_src.dne_remote.dne_nodeaddr);
|
|
info = GET_U_1(cmp->cm_ehello.eh_info);
|
|
blksize = GET_LE_U_2(cmp->cm_ehello.eh_blksize);
|
|
/*seed*/
|
|
dst =
|
|
GET_LE_U_2(cmp->cm_ehello.eh_router.dne_remote.dne_nodeaddr);
|
|
hello = GET_LE_U_2(cmp->cm_ehello.eh_hello);
|
|
other = GET_U_1(cmp->cm_ehello.eh_data);
|
|
print_i_info(ndo, info);
|
|
ND_PRINT("vers %u eco %u ueco %u src %s blksize %u rtr %s hello %u data %o",
|
|
vers, eco, ueco, dnaddr_string(ndo, src),
|
|
blksize, dnaddr_string(ndo, dst), hello, other);
|
|
break;
|
|
|
|
default:
|
|
ND_PRINT("unknown control message");
|
|
ND_DEFAULTPRINT((const u_char *)rhp, ND_MIN(length, caplen));
|
|
break;
|
|
}
|
|
return (1);
|
|
|
|
invalid:
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
print_t_info(netdissect_options *ndo,
|
|
u_int info)
|
|
{
|
|
u_int ntype = info & 3;
|
|
switch (ntype) {
|
|
case 0: ND_PRINT("reserved-ntype? "); break;
|
|
case TI_L2ROUT: ND_PRINT("l2rout "); break;
|
|
case TI_L1ROUT: ND_PRINT("l1rout "); break;
|
|
case TI_ENDNODE: ND_PRINT("endnode "); break;
|
|
}
|
|
if (info & TI_VERIF)
|
|
ND_PRINT("verif ");
|
|
if (info & TI_BLOCK)
|
|
ND_PRINT("blo ");
|
|
}
|
|
|
|
static void
|
|
print_l1_routes(netdissect_options *ndo,
|
|
const u_char *rp, u_int len)
|
|
{
|
|
u_int count;
|
|
u_int id;
|
|
u_int info;
|
|
|
|
/* The last short is a checksum */
|
|
while (len > (3 * sizeof(short))) {
|
|
ND_TCHECK_LEN(rp, 3 * sizeof(short));
|
|
count = GET_LE_U_2(rp);
|
|
if (count > 1024)
|
|
return; /* seems to be bogus from here on */
|
|
rp += sizeof(short);
|
|
len -= sizeof(short);
|
|
id = GET_LE_U_2(rp);
|
|
rp += sizeof(short);
|
|
len -= sizeof(short);
|
|
info = GET_LE_U_2(rp);
|
|
rp += sizeof(short);
|
|
len -= sizeof(short);
|
|
ND_PRINT("{ids %u-%u cost %u hops %u} ", id, id + count,
|
|
RI_COST(info), RI_HOPS(info));
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_l2_routes(netdissect_options *ndo,
|
|
const u_char *rp, u_int len)
|
|
{
|
|
u_int count;
|
|
u_int area;
|
|
u_int info;
|
|
|
|
/* The last short is a checksum */
|
|
while (len > (3 * sizeof(short))) {
|
|
ND_TCHECK_LEN(rp, 3 * sizeof(short));
|
|
count = GET_LE_U_2(rp);
|
|
if (count > 1024)
|
|
return; /* seems to be bogus from here on */
|
|
rp += sizeof(short);
|
|
len -= sizeof(short);
|
|
area = GET_LE_U_2(rp);
|
|
rp += sizeof(short);
|
|
len -= sizeof(short);
|
|
info = GET_LE_U_2(rp);
|
|
rp += sizeof(short);
|
|
len -= sizeof(short);
|
|
ND_PRINT("{areas %u-%u cost %u hops %u} ", area, area + count,
|
|
RI_COST(info), RI_HOPS(info));
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_i_info(netdissect_options *ndo,
|
|
u_int info)
|
|
{
|
|
u_int ntype = info & II_TYPEMASK;
|
|
switch (ntype) {
|
|
case 0: ND_PRINT("reserved-ntype? "); break;
|
|
case II_L2ROUT: ND_PRINT("l2rout "); break;
|
|
case II_L1ROUT: ND_PRINT("l1rout "); break;
|
|
case II_ENDNODE: ND_PRINT("endnode "); break;
|
|
}
|
|
if (info & II_VERIF)
|
|
ND_PRINT("verif ");
|
|
if (info & II_NOMCAST)
|
|
ND_PRINT("nomcast ");
|
|
if (info & II_BLOCK)
|
|
ND_PRINT("blo ");
|
|
}
|
|
|
|
static void
|
|
print_elist(const u_char *elp _U_, u_int len _U_)
|
|
{
|
|
/* Not enough examples available for me to debug this */
|
|
}
|
|
|
|
static int
|
|
print_nsp(netdissect_options *ndo,
|
|
const u_char *nspp, u_int nsplen)
|
|
{
|
|
const struct nsphdr *nsphp = (const struct nsphdr *)nspp;
|
|
u_int dst, src, flags;
|
|
|
|
if (nsplen < sizeof(struct nsphdr)) {
|
|
ND_PRINT(" (nsplen %u < %zu)", nsplen, sizeof(struct nsphdr));
|
|
goto invalid;
|
|
}
|
|
flags = GET_U_1(nsphp->nh_flags);
|
|
dst = GET_LE_U_2(nsphp->nh_dst);
|
|
src = GET_LE_U_2(nsphp->nh_src);
|
|
|
|
switch (flags & NSP_TYPEMASK) {
|
|
case MFT_DATA:
|
|
switch (flags & NSP_SUBMASK) {
|
|
case MFS_BOM:
|
|
case MFS_MOM:
|
|
case MFS_EOM:
|
|
case MFS_BOM+MFS_EOM:
|
|
ND_PRINT("data %u>%u ", src, dst);
|
|
{
|
|
const struct seghdr *shp = (const struct seghdr *)nspp;
|
|
u_int ack;
|
|
u_int data_off = sizeof(struct minseghdr);
|
|
|
|
if (nsplen < data_off)
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[0]);
|
|
if (ack & SGQ_ACK) { /* acknum field */
|
|
if ((ack & SGQ_NAK) == SGQ_NAK)
|
|
ND_PRINT("nak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ack %u ", ack & SGQ_MASK);
|
|
data_off += sizeof(short);
|
|
if (nsplen < data_off)
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[1]);
|
|
if (ack & SGQ_OACK) { /* ackoth field */
|
|
if ((ack & SGQ_ONAK) == SGQ_ONAK)
|
|
ND_PRINT("onak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("oack %u ", ack & SGQ_MASK);
|
|
data_off += sizeof(short);
|
|
if (nsplen < data_off)
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[2]);
|
|
}
|
|
}
|
|
ND_PRINT("seg %u ", ack & SGQ_MASK);
|
|
}
|
|
break;
|
|
case MFS_ILS+MFS_INT:
|
|
ND_PRINT("intr ");
|
|
{
|
|
const struct seghdr *shp = (const struct seghdr *)nspp;
|
|
u_int ack;
|
|
u_int data_off = sizeof(struct minseghdr);
|
|
|
|
if (nsplen < data_off)
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[0]);
|
|
if (ack & SGQ_ACK) { /* acknum field */
|
|
if ((ack & SGQ_NAK) == SGQ_NAK)
|
|
ND_PRINT("nak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ack %u ", ack & SGQ_MASK);
|
|
data_off += sizeof(short);
|
|
if (nsplen < data_off)
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[1]);
|
|
if (ack & SGQ_OACK) { /* ackdat field */
|
|
if ((ack & SGQ_ONAK) == SGQ_ONAK)
|
|
ND_PRINT("nakdat %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ackdat %u ", ack & SGQ_MASK);
|
|
data_off += sizeof(short);
|
|
if (nsplen < data_off)
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[2]);
|
|
}
|
|
}
|
|
ND_PRINT("seg %u ", ack & SGQ_MASK);
|
|
}
|
|
break;
|
|
case MFS_ILS:
|
|
ND_PRINT("link-service %u>%u ", src, dst);
|
|
{
|
|
const struct seghdr *shp = (const struct seghdr *)nspp;
|
|
const struct lsmsg *lsmp =
|
|
(const struct lsmsg *)(nspp + sizeof(struct seghdr));
|
|
u_int ack;
|
|
u_int lsflags, fcval;
|
|
|
|
if (nsplen < sizeof(struct seghdr) + sizeof(struct lsmsg))
|
|
goto invalid;
|
|
ack = GET_LE_U_2(shp->sh_seq[0]);
|
|
if (ack & SGQ_ACK) { /* acknum field */
|
|
if ((ack & SGQ_NAK) == SGQ_NAK)
|
|
ND_PRINT("nak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ack %u ", ack & SGQ_MASK);
|
|
ack = GET_LE_U_2(shp->sh_seq[1]);
|
|
if (ack & SGQ_OACK) { /* ackdat field */
|
|
if ((ack & SGQ_ONAK) == SGQ_ONAK)
|
|
ND_PRINT("nakdat %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ackdat %u ", ack & SGQ_MASK);
|
|
ack = GET_LE_U_2(shp->sh_seq[2]);
|
|
}
|
|
}
|
|
ND_PRINT("seg %u ", ack & SGQ_MASK);
|
|
lsflags = GET_U_1(lsmp->ls_lsflags);
|
|
fcval = GET_U_1(lsmp->ls_fcval);
|
|
switch (lsflags & LSI_MASK) {
|
|
case LSI_DATA:
|
|
ND_PRINT("dat seg count %u ", fcval);
|
|
switch (lsflags & LSM_MASK) {
|
|
case LSM_NOCHANGE:
|
|
break;
|
|
case LSM_DONOTSEND:
|
|
ND_PRINT("donotsend-data ");
|
|
break;
|
|
case LSM_SEND:
|
|
ND_PRINT("send-data ");
|
|
break;
|
|
default:
|
|
ND_PRINT("reserved-fcmod? %x", lsflags);
|
|
break;
|
|
}
|
|
break;
|
|
case LSI_INTR:
|
|
ND_PRINT("intr req count %u ", fcval);
|
|
break;
|
|
default:
|
|
ND_PRINT("reserved-fcval-int? %x", lsflags);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
ND_PRINT("reserved-subtype? %x %u > %u", flags, src, dst);
|
|
break;
|
|
}
|
|
break;
|
|
case MFT_ACK:
|
|
switch (flags & NSP_SUBMASK) {
|
|
case MFS_DACK:
|
|
ND_PRINT("data-ack %u>%u ", src, dst);
|
|
{
|
|
const struct ackmsg *amp = (const struct ackmsg *)nspp;
|
|
u_int ack;
|
|
|
|
if (nsplen < sizeof(struct ackmsg))
|
|
goto invalid;
|
|
ND_TCHECK_SIZE(amp);
|
|
ack = GET_LE_U_2(amp->ak_acknum[0]);
|
|
if (ack & SGQ_ACK) { /* acknum field */
|
|
if ((ack & SGQ_NAK) == SGQ_NAK)
|
|
ND_PRINT("nak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ack %u ", ack & SGQ_MASK);
|
|
ack = GET_LE_U_2(amp->ak_acknum[1]);
|
|
if (ack & SGQ_OACK) { /* ackoth field */
|
|
if ((ack & SGQ_ONAK) == SGQ_ONAK)
|
|
ND_PRINT("onak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("oack %u ", ack & SGQ_MASK);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case MFS_IACK:
|
|
ND_PRINT("ils-ack %u>%u ", src, dst);
|
|
{
|
|
const struct ackmsg *amp = (const struct ackmsg *)nspp;
|
|
u_int ack;
|
|
|
|
if (nsplen < sizeof(struct ackmsg))
|
|
goto invalid;
|
|
ND_TCHECK_SIZE(amp);
|
|
ack = GET_LE_U_2(amp->ak_acknum[0]);
|
|
if (ack & SGQ_ACK) { /* acknum field */
|
|
if ((ack & SGQ_NAK) == SGQ_NAK)
|
|
ND_PRINT("nak %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ack %u ", ack & SGQ_MASK);
|
|
ack = GET_LE_U_2(amp->ak_acknum[1]);
|
|
if (ack & SGQ_OACK) { /* ackdat field */
|
|
if ((ack & SGQ_ONAK) == SGQ_ONAK)
|
|
ND_PRINT("nakdat %u ", ack & SGQ_MASK);
|
|
else
|
|
ND_PRINT("ackdat %u ", ack & SGQ_MASK);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case MFS_CACK:
|
|
ND_PRINT("conn-ack %u", dst);
|
|
break;
|
|
default:
|
|
ND_PRINT("reserved-acktype? %x %u > %u", flags, src, dst);
|
|
break;
|
|
}
|
|
break;
|
|
case MFT_CTL:
|
|
switch (flags & NSP_SUBMASK) {
|
|
case MFS_CI:
|
|
case MFS_RCI:
|
|
if ((flags & NSP_SUBMASK) == MFS_CI)
|
|
ND_PRINT("conn-initiate ");
|
|
else
|
|
ND_PRINT("retrans-conn-initiate ");
|
|
ND_PRINT("%u>%u ", src, dst);
|
|
{
|
|
const struct cimsg *cimp = (const struct cimsg *)nspp;
|
|
u_int services, info, segsize;
|
|
|
|
if (nsplen < sizeof(struct cimsg))
|
|
goto invalid;
|
|
services = GET_U_1(cimp->ci_services);
|
|
info = GET_U_1(cimp->ci_info);
|
|
segsize = GET_LE_U_2(cimp->ci_segsize);
|
|
|
|
switch (services & COS_MASK) {
|
|
case COS_NONE:
|
|
break;
|
|
case COS_SEGMENT:
|
|
ND_PRINT("seg ");
|
|
break;
|
|
case COS_MESSAGE:
|
|
ND_PRINT("msg ");
|
|
break;
|
|
}
|
|
switch (info & COI_MASK) {
|
|
case COI_32:
|
|
ND_PRINT("ver 3.2 ");
|
|
break;
|
|
case COI_31:
|
|
ND_PRINT("ver 3.1 ");
|
|
break;
|
|
case COI_40:
|
|
ND_PRINT("ver 4.0 ");
|
|
break;
|
|
case COI_41:
|
|
ND_PRINT("ver 4.1 ");
|
|
break;
|
|
}
|
|
ND_PRINT("segsize %u ", segsize);
|
|
}
|
|
break;
|
|
case MFS_CC:
|
|
ND_PRINT("conn-confirm %u>%u ", src, dst);
|
|
{
|
|
const struct ccmsg *ccmp = (const struct ccmsg *)nspp;
|
|
u_int services, info;
|
|
u_int segsize, optlen;
|
|
|
|
if (nsplen < sizeof(struct ccmsg))
|
|
goto invalid;
|
|
services = GET_U_1(ccmp->cc_services);
|
|
info = GET_U_1(ccmp->cc_info);
|
|
segsize = GET_LE_U_2(ccmp->cc_segsize);
|
|
optlen = GET_U_1(ccmp->cc_optlen);
|
|
|
|
switch (services & COS_MASK) {
|
|
case COS_NONE:
|
|
break;
|
|
case COS_SEGMENT:
|
|
ND_PRINT("seg ");
|
|
break;
|
|
case COS_MESSAGE:
|
|
ND_PRINT("msg ");
|
|
break;
|
|
}
|
|
switch (info & COI_MASK) {
|
|
case COI_32:
|
|
ND_PRINT("ver 3.2 ");
|
|
break;
|
|
case COI_31:
|
|
ND_PRINT("ver 3.1 ");
|
|
break;
|
|
case COI_40:
|
|
ND_PRINT("ver 4.0 ");
|
|
break;
|
|
case COI_41:
|
|
ND_PRINT("ver 4.1 ");
|
|
break;
|
|
}
|
|
ND_PRINT("segsize %u ", segsize);
|
|
if (optlen) {
|
|
ND_PRINT("optlen %u ", optlen);
|
|
}
|
|
}
|
|
break;
|
|
case MFS_DI:
|
|
ND_PRINT("disconn-initiate %u>%u ", src, dst);
|
|
{
|
|
const struct dimsg *dimp = (const struct dimsg *)nspp;
|
|
u_int reason;
|
|
u_int optlen;
|
|
|
|
if (nsplen < sizeof(struct dimsg))
|
|
goto invalid;
|
|
reason = GET_LE_U_2(dimp->di_reason);
|
|
optlen = GET_U_1(dimp->di_optlen);
|
|
|
|
print_reason(ndo, reason);
|
|
if (optlen) {
|
|
ND_PRINT("optlen %u ", optlen);
|
|
}
|
|
}
|
|
break;
|
|
case MFS_DC:
|
|
ND_PRINT("disconn-confirm %u>%u ", src, dst);
|
|
{
|
|
const struct dcmsg *dcmp = (const struct dcmsg *)nspp;
|
|
u_int reason;
|
|
|
|
reason = GET_LE_U_2(dcmp->dc_reason);
|
|
|
|
print_reason(ndo, reason);
|
|
}
|
|
break;
|
|
default:
|
|
ND_PRINT("reserved-ctltype? %x %u > %u", flags, src, dst);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
ND_PRINT("reserved-type? %x %u > %u", flags, src, dst);
|
|
break;
|
|
}
|
|
return (1);
|
|
|
|
invalid:
|
|
return (0);
|
|
}
|
|
|
|
static const struct tok reason2str[] = {
|
|
{ UC_OBJREJECT, "object rejected connect" },
|
|
{ UC_RESOURCES, "insufficient resources" },
|
|
{ UC_NOSUCHNODE, "unrecognized node name" },
|
|
{ DI_SHUT, "node is shutting down" },
|
|
{ UC_NOSUCHOBJ, "unrecognized object" },
|
|
{ UC_INVOBJFORMAT, "invalid object name format" },
|
|
{ UC_OBJTOOBUSY, "object too busy" },
|
|
{ DI_PROTOCOL, "protocol error discovered" },
|
|
{ DI_TPA, "third party abort" },
|
|
{ UC_USERABORT, "user abort" },
|
|
{ UC_INVNODEFORMAT, "invalid node name format" },
|
|
{ UC_LOCALSHUT, "local node shutting down" },
|
|
{ DI_LOCALRESRC, "insufficient local resources" },
|
|
{ DI_REMUSERRESRC, "insufficient remote user resources" },
|
|
{ UC_ACCESSREJECT, "invalid access control information" },
|
|
{ DI_BADACCNT, "bad ACCOUNT information" },
|
|
{ UC_NORESPONSE, "no response from object" },
|
|
{ UC_UNREACHABLE, "node unreachable" },
|
|
{ DC_NOLINK, "no link terminate" },
|
|
{ DC_COMPLETE, "disconnect complete" },
|
|
{ DI_BADIMAGE, "bad image data in connect" },
|
|
{ DI_SERVMISMATCH, "cryptographic service mismatch" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
print_reason(netdissect_options *ndo,
|
|
u_int reason)
|
|
{
|
|
ND_PRINT("%s ", tok2str(reason2str, "reason-%u", reason));
|
|
}
|
|
|
|
const char *
|
|
dnnum_string(netdissect_options *ndo, u_short dnaddr)
|
|
{
|
|
char *str;
|
|
size_t siz;
|
|
u_int area = (u_short)(dnaddr & AREAMASK) >> AREASHIFT;
|
|
u_int node = dnaddr & NODEMASK;
|
|
|
|
/* malloc() return used by the 'dnaddrtable' hash table: do not free() */
|
|
str = (char *)malloc(siz = sizeof("00.0000"));
|
|
if (str == NULL)
|
|
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: malloc", __func__);
|
|
snprintf(str, siz, "%u.%u", area, node);
|
|
return(str);
|
|
}
|