613 lines
14 KiB
C
613 lines
14 KiB
C
/* $NetBSD: print-lwres.c,v 1.2 2001/06/25 19:59:59 itojun Exp $ */
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/*
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* Copyright (C) 2001 WIDE Project.
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* 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 the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char rcsid[] =
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"@(#) Header: /tcpdump/master/tcpdump/print-lwres.c,v 1.4 2001/02/09 05:16:48 guy Exp (LBL)";
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#else
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__RCSID("$NetBSD: print-lwres.c,v 1.2 2001/06/25 19:59:59 itojun Exp $");
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#endif
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#endif
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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 <sys/param.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#ifdef NOERROR
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#undef NOERROR /* Solaris sucks */
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#endif
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#ifdef NOERROR
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#undef T_UNSPEC /* SINIX does too */
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#endif
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#include "nameser.h"
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h" /* must come after interface.h */
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/* BIND9 lib/lwres/include/lwres */
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typedef u_int32_t lwres_uint32_t;
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typedef u_int16_t lwres_uint16_t;
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typedef u_int8_t lwres_uint8_t;
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struct lwres_lwpacket {
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lwres_uint32_t length;
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lwres_uint16_t version;
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lwres_uint16_t pktflags;
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lwres_uint32_t serial;
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lwres_uint32_t opcode;
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lwres_uint32_t result;
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lwres_uint32_t recvlength;
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lwres_uint16_t authtype;
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lwres_uint16_t authlength;
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};
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#define LWRES_LWPACKETFLAG_RESPONSE 0x0001U /* if set, pkt is a response */
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#define LWRES_LWPACKETVERSION_0 0
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#define LWRES_FLAG_TRUSTNOTREQUIRED 0x00000001U
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#define LWRES_FLAG_SECUREDATA 0x00000002U
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/*
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* no-op
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*/
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#define LWRES_OPCODE_NOOP 0x00000000U
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typedef struct {
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/* public */
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lwres_uint16_t datalength;
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/* data follows */
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} lwres_nooprequest_t;
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typedef struct {
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/* public */
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lwres_uint16_t datalength;
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/* data follows */
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} lwres_noopresponse_t;
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/*
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* get addresses by name
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*/
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#define LWRES_OPCODE_GETADDRSBYNAME 0x00010001U
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typedef struct lwres_addr lwres_addr_t;
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struct lwres_addr {
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lwres_uint32_t family;
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lwres_uint16_t length;
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/* address folows */
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};
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typedef struct {
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/* public */
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lwres_uint32_t flags;
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lwres_uint32_t addrtypes;
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lwres_uint16_t namelen;
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/* name follows */
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} lwres_gabnrequest_t;
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typedef struct {
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/* public */
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lwres_uint32_t flags;
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lwres_uint16_t naliases;
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lwres_uint16_t naddrs;
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lwres_uint16_t realnamelen;
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/* aliases follows */
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/* addrs follows */
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/* realname follows */
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} lwres_gabnresponse_t;
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/*
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* get name by address
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*/
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#define LWRES_OPCODE_GETNAMEBYADDR 0x00010002U
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typedef struct {
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/* public */
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lwres_uint32_t flags;
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lwres_addr_t addr;
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/* addr body follows */
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} lwres_gnbarequest_t;
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typedef struct {
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/* public */
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lwres_uint32_t flags;
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lwres_uint16_t naliases;
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lwres_uint16_t realnamelen;
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/* aliases follows */
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/* realname follows */
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} lwres_gnbaresponse_t;
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/*
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* get rdata by name
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*/
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#define LWRES_OPCODE_GETRDATABYNAME 0x00010003U
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typedef struct {
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/* public */
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lwres_uint32_t flags;
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lwres_uint16_t rdclass;
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lwres_uint16_t rdtype;
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lwres_uint16_t namelen;
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/* name follows */
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} lwres_grbnrequest_t;
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typedef struct {
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/* public */
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lwres_uint32_t flags;
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lwres_uint16_t rdclass;
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lwres_uint16_t rdtype;
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lwres_uint32_t ttl;
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lwres_uint16_t nrdatas;
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lwres_uint16_t nsigs;
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/* realname here (len + name) */
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/* rdata here (len + name) */
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/* signatures here (len + name) */
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} lwres_grbnresponse_t;
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#define LWRDATA_VALIDATED 0x00000001
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#define LWRES_ADDRTYPE_V4 0x00000001U /* ipv4 */
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#define LWRES_ADDRTYPE_V6 0x00000002U /* ipv6 */
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#define LWRES_MAX_ALIASES 16 /* max # of aliases */
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#define LWRES_MAX_ADDRS 64 /* max # of addrs */
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struct tok opcode[] = {
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{ LWRES_OPCODE_NOOP, "noop", },
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{ LWRES_OPCODE_GETADDRSBYNAME, "getaddrsbyname", },
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{ LWRES_OPCODE_GETNAMEBYADDR, "getnamebyaddr", },
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{ LWRES_OPCODE_GETRDATABYNAME, "getrdatabyname", },
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{ 0, NULL, },
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};
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/* print-domain.c */
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extern struct tok ns_type2str[];
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extern struct tok ns_class2str[];
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static int lwres_printname(size_t, const char *);
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static int lwres_printnamelen(const char *);
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static int lwres_printbinlen(const char *);
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static int lwres_printaddr(lwres_addr_t *);
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static int
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lwres_printname(size_t l, const char *p0)
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{
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const char *p;
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int i;
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p = p0;
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/* + 1 for terminating \0 */
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if (p + l + 1 > (const char *)snapend)
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goto trunc;
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printf(" ");
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for (i = 0; i < l; i++)
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safeputchar(*p++);
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p++; /* skip terminating \0 */
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return p - p0;
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trunc:
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return -1;
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}
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static int
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lwres_printnamelen(const char *p)
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{
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u_int16_t l;
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int advance;
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if (p + 2 > (const char *)snapend)
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goto trunc;
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l = EXTRACT_16BITS(p);
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advance = lwres_printname(l, p + 2);
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if (advance < 0)
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goto trunc;
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return 2 + advance;
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trunc:
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return -1;
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}
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static int
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lwres_printbinlen(const char *p0)
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{
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const char *p;
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u_int16_t l;
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int i;
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p = p0;
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if (p + 2 > (const char *)snapend)
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goto trunc;
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l = EXTRACT_16BITS(p);
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if (p + 2 + l > (const char *)snapend)
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goto trunc;
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p += 2;
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for (i = 0; i < l; i++)
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printf("%02x", *p++);
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return p - p0;
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trunc:
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return -1;
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}
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static int
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lwres_printaddr(lwres_addr_t *ap)
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{
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u_int16_t l;
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const char *p;
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int i;
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TCHECK(ap->length);
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l = ntohs(ap->length);
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/* XXX ap points to packed struct */
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p = (const char *)&ap->length + sizeof(ap->length);
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if (p + l > (const char *)snapend)
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goto trunc;
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switch (ntohl(ap->family)) {
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case 1: /* IPv4 */
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printf(" %s", ipaddr_string(p));
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p += sizeof(struct in_addr);
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break;
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#ifdef INET6
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case 2: /* IPv6 */
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printf(" %s", ip6addr_string(p));
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p += sizeof(struct in6_addr);
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break;
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#endif
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default:
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printf(" %lu/", (unsigned long)ntohl(ap->family));
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for (i = 0; i < l; i++)
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printf("%02x", *p++);
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}
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return p - (const char *)ap;
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trunc:
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return -1;
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}
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void
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lwres_print(register const u_char *bp, u_int length)
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{
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const struct lwres_lwpacket *np;
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u_int32_t v;
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const char *s;
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int response;
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int advance;
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int unsupported = 0;
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np = (const struct lwres_lwpacket *)bp;
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TCHECK(np->authlength);
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printf(" lwres");
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v = ntohs(np->version);
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if (vflag || v != LWRES_LWPACKETVERSION_0)
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printf(" v%u", v);
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if (v != LWRES_LWPACKETVERSION_0) {
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s = (const char *)np + ntohl(np->length);
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goto tail;
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}
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response = ntohs(np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE;
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/* opcode and pktflags */
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v = (u_int32_t)ntohl(np->opcode);
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s = tok2str(opcode, "#0x%x", v);
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printf(" %s%s", s, response ? "" : "?");
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/* pktflags */
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v = ntohs(np->pktflags);
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if (v & ~LWRES_LWPACKETFLAG_RESPONSE)
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printf("[0x%x]", v);
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if (vflag > 1) {
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printf(" ("); /*)*/
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printf("serial:0x%lx", (unsigned long)ntohl(np->serial));
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printf(" result:0x%lx", (unsigned long)ntohl(np->result));
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printf(" recvlen:%lu", (unsigned long)ntohl(np->recvlength));
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/* BIND910: not used */
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if (vflag > 2) {
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printf(" authtype:0x%x", ntohs(np->authtype));
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printf(" authlen:%u", ntohs(np->authlength));
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}
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/*(*/
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printf(")");
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}
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/* per-opcode content */
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if (!response) {
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/*
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* queries
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*/
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lwres_gabnrequest_t *gabn;
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lwres_gnbarequest_t *gnba;
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lwres_grbnrequest_t *grbn;
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u_int32_t l;
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gabn = NULL;
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gnba = NULL;
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grbn = NULL;
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switch (ntohl(np->opcode)) {
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case LWRES_OPCODE_NOOP:
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break;
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case LWRES_OPCODE_GETADDRSBYNAME:
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gabn = (lwres_gabnrequest_t *)(np + 1);
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TCHECK(gabn->namelen);
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/* XXX gabn points to packed struct */
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s = (const char *)&gabn->namelen +
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sizeof(gabn->namelen);
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l = ntohs(gabn->namelen);
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/* BIND910: not used */
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if (vflag > 2) {
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printf(" flags:0x%lx",
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(unsigned long)ntohl(gabn->flags));
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}
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v = (u_int32_t)ntohl(gabn->addrtypes);
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switch (v & (LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6)) {
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case LWRES_ADDRTYPE_V4:
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printf(" IPv4");
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break;
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case LWRES_ADDRTYPE_V6:
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printf(" IPv6");
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break;
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case LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6:
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printf(" IPv4/6");
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break;
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}
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if (v & ~(LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6))
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printf("[0x%x]", v);
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advance = lwres_printname(l, s);
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if (advance < 0)
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goto trunc;
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s += advance;
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break;
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case LWRES_OPCODE_GETNAMEBYADDR:
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gnba = (lwres_gnbarequest_t *)(np + 1);
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TCHECK(gnba->addr);
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/* BIND910: not used */
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if (vflag > 2) {
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printf(" flags:0x%lx",
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(unsigned long)ntohl(gnba->flags));
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}
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s = (const char *)&gnba->addr;
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advance = lwres_printaddr(&gnba->addr);
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if (advance < 0)
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goto trunc;
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s += advance;
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break;
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case LWRES_OPCODE_GETRDATABYNAME:
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/* XXX no trace, not tested */
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grbn = (lwres_grbnrequest_t *)(np + 1);
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TCHECK(grbn->namelen);
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/* BIND910: not used */
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if (vflag > 2) {
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printf(" flags:0x%lx",
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(unsigned long)ntohl(grbn->flags));
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}
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printf(" %s", tok2str(ns_type2str, "Type%d",
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ntohs(grbn->rdtype)));
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if (ntohs(grbn->rdclass) != C_IN);
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printf(" %s", tok2str(ns_class2str, "Class%d",
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ntohs(grbn->rdclass)));
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/* XXX grbn points to packed struct */
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s = (const char *)&grbn->namelen +
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sizeof(grbn->namelen);
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l = ntohs(gabn->namelen);
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advance = lwres_printname(l, s);
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if (advance < 0)
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goto trunc;
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s += advance;
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break;
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default:
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unsupported++;
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break;
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}
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} else {
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/*
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* responses
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*/
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lwres_gabnresponse_t *gabn;
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lwres_gnbaresponse_t *gnba;
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lwres_grbnresponse_t *grbn;
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u_int32_t l, na;
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int i;
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gabn = NULL;
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gnba = NULL;
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grbn = NULL;
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switch (ntohl(np->opcode)) {
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case LWRES_OPCODE_NOOP:
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break;
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case LWRES_OPCODE_GETADDRSBYNAME:
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gabn = (lwres_gabnresponse_t *)(np + 1);
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TCHECK(gabn->realnamelen);
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/* XXX gabn points to packed struct */
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s = (const char *)&gabn->realnamelen +
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sizeof(gabn->realnamelen);
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l = ntohs(gabn->realnamelen);
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/* BIND910: not used */
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if (vflag > 2) {
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printf(" flags:0x%lx",
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(unsigned long)ntohl(gabn->flags));
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}
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printf(" %u/%u", ntohs(gabn->naliases),
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ntohs(gabn->naddrs));
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advance = lwres_printname(l, s);
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if (advance < 0)
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goto trunc;
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s += advance;
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/* aliases */
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na = ntohs(gabn->naliases);
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for (i = 0; i < na; i++) {
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advance = lwres_printnamelen(s);
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if (advance < 0)
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goto trunc;
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s += advance;
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}
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/* addrs */
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na = ntohs(gabn->naddrs);
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for (i = 0; i < na; i++) {
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advance = lwres_printaddr((lwres_addr_t *)s);
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if (advance < 0)
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goto trunc;
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s += advance;
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}
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break;
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case LWRES_OPCODE_GETNAMEBYADDR:
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gnba = (lwres_gnbaresponse_t *)(np + 1);
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TCHECK(gnba->realnamelen);
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/* XXX gnba points to packed struct */
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s = (const char *)&gnba->realnamelen +
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sizeof(gnba->realnamelen);
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l = ntohs(gnba->realnamelen);
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/* BIND910: not used */
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if (vflag > 2) {
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printf(" flags:0x%lx",
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(unsigned long)ntohl(gnba->flags));
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}
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printf(" %u", ntohs(gnba->naliases));
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|
|
advance = lwres_printname(l, s);
|
|
if (advance < 0)
|
|
goto trunc;
|
|
s += advance;
|
|
|
|
/* aliases */
|
|
na = ntohs(gnba->naliases);
|
|
for (i = 0; i < na; i++) {
|
|
advance = lwres_printnamelen(s);
|
|
if (advance < 0)
|
|
goto trunc;
|
|
s += advance;
|
|
}
|
|
break;
|
|
case LWRES_OPCODE_GETRDATABYNAME:
|
|
/* XXX no trace, not tested */
|
|
grbn = (lwres_grbnresponse_t *)(np + 1);
|
|
TCHECK(grbn->nsigs);
|
|
|
|
/* BIND910: not used */
|
|
if (vflag > 2) {
|
|
printf(" flags:0x%lx",
|
|
(unsigned long)ntohl(grbn->flags));
|
|
}
|
|
|
|
printf(" %s", tok2str(ns_type2str, "Type%d",
|
|
ntohs(grbn->rdtype)));
|
|
if (ntohs(grbn->rdclass) != C_IN);
|
|
printf(" %s", tok2str(ns_class2str, "Class%d",
|
|
ntohs(grbn->rdclass)));
|
|
printf(" TTL ");
|
|
relts_print(ntohl(grbn->ttl));
|
|
printf(" %u/%u", ntohs(grbn->nrdatas),
|
|
ntohs(grbn->nsigs));
|
|
|
|
/* XXX grbn points to packed struct */
|
|
s = (const char *)&grbn->nsigs+ sizeof(grbn->nsigs);
|
|
|
|
advance = lwres_printnamelen(s);
|
|
if (advance < 0)
|
|
goto trunc;
|
|
s += advance;
|
|
|
|
/* rdatas */
|
|
na = ntohs(grbn->nrdatas);
|
|
for (i = 0; i < na; i++) {
|
|
/* XXX should decode resource data */
|
|
advance = lwres_printbinlen(s);
|
|
if (advance < 0)
|
|
goto trunc;
|
|
s += advance;
|
|
}
|
|
|
|
/* sigs */
|
|
na = ntohs(grbn->nsigs);
|
|
for (i = 0; i < na; i++) {
|
|
/* XXX how should we print it? */
|
|
advance = lwres_printbinlen(s);
|
|
if (advance < 0)
|
|
goto trunc;
|
|
s += advance;
|
|
}
|
|
break;
|
|
default:
|
|
unsupported++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
tail:
|
|
/* length mismatch */
|
|
if (ntohl(np->length) != length) {
|
|
printf(" [len: %lu != %u]", (unsigned long)ntohl(np->length),
|
|
length);
|
|
}
|
|
if (!unsupported && s < (const char *)np + ntohl(np->length))
|
|
printf("[extra]");
|
|
return;
|
|
|
|
trunc:
|
|
printf("[|lwres]");
|
|
return;
|
|
}
|