658 lines
17 KiB
C
658 lines
17 KiB
C
/* $FreeBSD$ */
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/*
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* Copyright (c) 1985, 1989
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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 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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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/*
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#ifndef lint
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static const char sccsid[] = "@(#)debug.c 5.26 (Berkeley) 3/21/91";
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static const char rcsid[] = "$Id: debug.c,v 8.17 2000/11/08 06:47:31 marka Exp $";
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#endif /* not lint */
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/*
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*******************************************************************************
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*
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* debug.c --
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*
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* Routines to print out packets received from a name server query.
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*
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* Modified version of 4.3BSD BIND res_debug.c 5.30 6/27/90
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*
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*******************************************************************************
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*/
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#include "port_before.h"
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include "port_after.h"
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#include "res.h"
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/*
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* Imported from res_debug.c
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*/
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#ifndef HAVE_DECL_RES_OPCODES
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extern char *_res_opcodes[];
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#endif
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/*
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* Used to highlight the start of a record when printing it.
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*/
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#define INDENT " -> "
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/*
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* Print the contents of a query.
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* This is intended to be primarily a debugging routine.
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*/
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void
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Print_query(const u_char *msg, const u_char *eom, int printHeader) {
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Fprint_query(msg, eom, printHeader, stdout);
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}
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void
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Fprint_query(const u_char *msg, const u_char *eom, int printHeader, FILE *file)
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{
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const u_char *cp;
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const HEADER *hp;
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int n;
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u_int class, type;
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/*
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* Print header fields.
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*/
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hp = (HEADER *)msg;
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cp = msg + HFIXEDSZ;
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if (printHeader || (res.options & RES_DEBUG2)) {
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fprintf(file," HEADER:\n");
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fprintf(file,"\topcode = %s", _res_opcodes[hp->opcode]);
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fprintf(file,", id = %d", ntohs(hp->id));
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fprintf(file,", rcode = %s\n", p_rcode(hp->rcode));
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fprintf(file,"\theader flags: ");
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if (hp->qr) {
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fprintf(file," response");
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} else {
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fprintf(file," query");
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}
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if (hp->aa)
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fprintf(file,", auth. answer");
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if (hp->tc)
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fprintf(file,", truncation");
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if (hp->rd)
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fprintf(file,", want recursion");
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if (hp->ra)
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fprintf(file,", recursion avail.");
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if (hp->unused)
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fprintf(file,", UNUSED-QUERY_BIT");
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if (hp->ad)
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fprintf(file,", authentic data");
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if (hp->cd)
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fprintf(file,", checking disabled");
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fprintf(file,"\n\tquestions = %d", ntohs(hp->qdcount));
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fprintf(file,", answers = %d", ntohs(hp->ancount));
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fprintf(file,", authority records = %d", ntohs(hp->nscount));
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fprintf(file,", additional = %d\n\n", ntohs(hp->arcount));
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}
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/*
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* Print question records.
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*/
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n = ntohs(hp->qdcount);
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if (n > 0) {
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fprintf(file," QUESTIONS:\n");
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while (--n >= 0) {
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fprintf(file,"\t");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL)
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return;
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type = ns_get16((u_char*)cp);
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cp += INT16SZ;
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class = ns_get16((u_char*)cp);
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cp += INT16SZ;
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fprintf(file,", type = %s", p_type(type));
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fprintf(file,", class = %s\n", p_class(class));
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}
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}
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/*
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* Print authoritative answer records
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*/
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n = ntohs(hp->ancount);
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if (n > 0) {
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fprintf(file," ANSWERS:\n");
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if (type == ns_t_a && n > MAXADDRS) {
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printf("Limiting response to MAX Addrs = %d \n",
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MAXADDRS);
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n = MAXADDRS;
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}
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while (--n >= 0) {
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fprintf(file, INDENT);
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cp = Print_rr(cp, msg, eom, file);
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if (cp == NULL)
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return;
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}
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}
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/*
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* print name server records
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*/
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n = ntohs(hp->nscount);
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if (n > 0) {
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fprintf(file," AUTHORITY RECORDS:\n");
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while (--n >= 0) {
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fprintf(file, INDENT);
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cp = Print_rr(cp, msg, eom, file);
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if (cp == NULL)
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return;
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}
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}
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/*
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* print additional records
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*/
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n = ntohs(hp->arcount);
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if (n > 0) {
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fprintf(file," ADDITIONAL RECORDS:\n");
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while (--n >= 0) {
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fprintf(file, INDENT);
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cp = Print_rr(cp, msg, eom, file);
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if (cp == NULL)
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return;
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}
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}
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fprintf(file,"\n------------\n");
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}
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const u_char *
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Print_cdname_sub(const u_char *cp, const u_char *msg, const u_char *eom,
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FILE *file, int format)
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{
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char name[MAXDNAME];
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int n;
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n = dn_expand(msg, eom, cp, name, sizeof name);
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if (n < 0)
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return (NULL);
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if (name[0] == '\0')
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strcpy(name, "(root)");
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if (format)
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fprintf(file, "%-30s", name);
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else
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fputs(name, file);
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return (cp + n);
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}
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const u_char *
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Print_cdname(const u_char *cp, const u_char *msg, const u_char *eom,
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FILE *file)
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{
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return (Print_cdname_sub(cp, msg, eom, file, 0));
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}
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const u_char *
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Print_cdname2(const u_char *cp, const u_char *msg, const u_char *eom,
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FILE *file)
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{
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return (Print_cdname_sub(cp, msg, eom, file, 1));
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}
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#define BOUNDS_CHECK(ptr, count) \
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do { \
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if ((ptr) + (count) > eom) { \
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fprintf(file, "(form error.)\n"); \
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return (NULL); \
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} \
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} while (0)
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/*
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* Print resource record fields in human readable form (not master file form).
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*/
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const u_char *
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Print_rr(const u_char *ocp, const u_char *msg, const u_char *eom, FILE *file) {
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u_int type, class;
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int dlen, n, c, debug;
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u_long rrttl, ttl;
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struct in_addr inaddr;
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const u_char *cp, *cp1, *cp2;
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if ((cp = Print_cdname(ocp, msg, eom, file)) == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ);
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NS_GET16(type, cp);
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NS_GET16(class, cp);
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NS_GET32(rrttl, cp);
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NS_GET16(dlen, cp);
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BOUNDS_CHECK(cp, dlen);
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debug = res.options & (RES_DEBUG|RES_DEBUG2);
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if (debug) {
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if (res.options & RES_DEBUG2)
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fprintf(file,"\n\ttype = %s, class = %s, dlen = %d",
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p_type(type), p_class(class), dlen);
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if (type == T_SOA)
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fprintf(file,"\n\tttl = %lu (%s)",
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rrttl, p_time(rrttl));
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putc('\n', file);
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}
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cp1 = cp;
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/*
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* Print type specific data, if appropriate
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*/
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switch (type) {
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case T_A:
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BOUNDS_CHECK(cp, INADDRSZ);
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memcpy(&inaddr, cp, INADDRSZ);
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fprintf(file,"\tinternet address = %s\n", inet_ntoa(inaddr));
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cp += dlen;
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break;
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case T_CNAME:
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fprintf(file,"\tcanonical name = ");
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goto doname;
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case T_MG:
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fprintf(file,"\tmail group member = ");
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goto doname;
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case T_MB:
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fprintf(file,"\tmail box = ");
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goto doname;
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case T_MR:
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fprintf(file,"\tmailbox rename = ");
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goto doname;
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case T_MX:
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BOUNDS_CHECK(cp, INT16SZ);
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fprintf(file,"\tpreference = %u",ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", mail exchanger = ");
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goto doname;
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case T_NAPTR:
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BOUNDS_CHECK(cp, 2 * INT16SZ);
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fprintf(file, "\torder = %u",ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", preference = %u\n", ns_get16((u_char*)cp));
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cp += INT16SZ;
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/* Flags */
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BOUNDS_CHECK(cp, 1);
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n = *cp++;
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BOUNDS_CHECK(cp, n);
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fprintf(file,"\tflags = \"%.*s\"\n", (int)n, cp);
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cp += n;
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/* Service */
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BOUNDS_CHECK(cp, 1);
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n = *cp++;
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BOUNDS_CHECK(cp, n);
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fprintf(file,"\tservices = \"%.*s\"\n", (int)n, cp);
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cp += n;
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/* Regexp */
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BOUNDS_CHECK(cp, 1);
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n = *cp++;
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BOUNDS_CHECK(cp, n);
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fprintf(file,"\trule = \"%.*s\"\n", (int)n, cp);
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cp += n;
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/* Replacement */
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fprintf(file,"\treplacement = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(replacement truncated?)\n");
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return (NULL); /* compression error */
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}
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(void) putc('\n', file);
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break;
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case T_SRV:
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BOUNDS_CHECK(cp, 3 * INT16SZ);
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fprintf(file, "\tpriority = %u",ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", weight = %u", ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", port= %u\n", ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,"\thost = ");
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goto doname;
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case T_PX:
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BOUNDS_CHECK(cp, INT16SZ);
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fprintf(file,"\tpreference = %u",ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", RFC 822 = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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fprintf(file,"\nX.400 = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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(void) putc('\n', file);
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break;
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case T_RT:
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BOUNDS_CHECK(cp, INT16SZ);
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fprintf(file,"\tpreference = %u",ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", router = ");
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goto doname;
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case T_AFSDB:
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BOUNDS_CHECK(cp, INT16SZ);
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fprintf(file,"\tsubtype = %d",ns_get16((u_char*)cp));
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cp += INT16SZ;
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fprintf(file,", DCE/AFS server = ");
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goto doname;
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case T_NS:
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fprintf(file,"\tnameserver = ");
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goto doname;
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case T_PTR:
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fprintf(file,"\tname = ");
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doname:
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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(void) putc('\n', file);
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break;
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case T_HINFO:
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cp2 = cp + dlen;
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BOUNDS_CHECK(cp, 1);
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if ((n = *cp++) != 0) {
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BOUNDS_CHECK(cp, n);
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fprintf(file,"\tCPU = %.*s", n, cp);
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cp += n;
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}
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if ((cp < cp2) && ((n = *cp++) != 0)) {
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BOUNDS_CHECK(cp, n);
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fprintf(file,"\tOS = %.*s\n", n, cp);
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cp += n;
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} else fprintf(file, "\n*** Warning *** OS-type missing\n");
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break;
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case T_ISDN:
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cp2 = cp + dlen;
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BOUNDS_CHECK(cp, 1);
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n = *cp++;
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if (n != 0) {
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BOUNDS_CHECK(cp, n);
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fprintf(file,"\tISDN = \"%.*s", n, cp);
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cp += n;
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}
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if ((cp < cp2) && (n = *cp++)) {
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BOUNDS_CHECK(cp, n);
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fprintf(file,"-%.*s\"\n", n, cp);
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cp += n;
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} else fprintf(file,"\"\n");
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break;
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case T_SOA:
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if (!debug)
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putc('\n', file);
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fprintf(file,"\torigin = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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fprintf(file,"\n\tmail addr = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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BOUNDS_CHECK(cp, 5 * INT32SZ);
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fprintf(file,"\n\tserial = %lu", ns_get32((u_char*)cp));
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cp += INT32SZ;
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ttl = ns_get32((u_char*)cp);
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fprintf(file,"\n\trefresh = %lu (%s)", ttl, p_time(ttl));
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cp += INT32SZ;
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ttl = ns_get32((u_char*)cp);
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fprintf(file,"\n\tretry = %lu (%s)", ttl, p_time(ttl));
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cp += INT32SZ;
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ttl = ns_get32((u_char*)cp);
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fprintf(file,"\n\texpire = %lu (%s)", ttl, p_time(ttl));
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cp += INT32SZ;
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ttl = ns_get32((u_char*)cp);
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fprintf(file,
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"\n\tminimum ttl = %lu (%s)\n", ttl, p_time(ttl));
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cp += INT32SZ;
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break;
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case T_MINFO:
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if (!debug)
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putc('\n', file);
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fprintf(file,"\trequests = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
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return (NULL); /* compression error */
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}
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fprintf(file,"\n\terrors = ");
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cp = Print_cdname(cp, msg, eom, file);
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if (cp == NULL) {
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fprintf(file, "(name truncated?)\n");
|
|
return (NULL); /* compression error */
|
|
}
|
|
(void) putc('\n', file);
|
|
break;
|
|
|
|
case T_RP:
|
|
if (!debug)
|
|
putc('\n', file);
|
|
fprintf(file,"\tmailbox = ");
|
|
cp = Print_cdname(cp, msg, eom, file);
|
|
if (cp == NULL) {
|
|
fprintf(file, "(name truncated?)\n");
|
|
return (NULL); /* compression error */
|
|
}
|
|
fprintf(file,"\n\ttext = ");
|
|
cp = Print_cdname(cp, msg, eom, file);
|
|
if (cp == NULL) {
|
|
fprintf(file, "(name truncated?)\n");
|
|
return (NULL); /* compression error */
|
|
}
|
|
(void) putc('\n', file);
|
|
break;
|
|
|
|
case T_TXT:
|
|
(void) fputs("\ttext = ", file);
|
|
cp2 = cp1 + dlen;
|
|
while (cp < cp2) {
|
|
(void) putc('"', file);
|
|
n = (unsigned char) *cp++;
|
|
if (n != 0) {
|
|
for (c = n; c > 0 && cp < cp2; c--) {
|
|
if ((*cp == '\n') || (*cp == '"') || (*cp == '\\'))
|
|
(void) putc('\\', file);
|
|
(void) putc(*cp++, file);
|
|
}
|
|
}
|
|
(void) putc('"', file);
|
|
if (cp < cp2)
|
|
(void) putc(' ', file);
|
|
}
|
|
(void) putc('\n', file);
|
|
break;
|
|
|
|
case T_X25:
|
|
(void) fputs("\tX25 = \"", file);
|
|
cp2 = cp1 + dlen;
|
|
while (cp < cp2) {
|
|
n = (unsigned char) *cp++;
|
|
if (n != 0) {
|
|
for (c = n; c > 0 && cp < cp2; c--)
|
|
if (*cp == '\n') {
|
|
(void) putc('\\', file);
|
|
(void) putc(*cp++, file);
|
|
} else
|
|
(void) putc(*cp++, file);
|
|
}
|
|
}
|
|
(void) fputs("\"\n", file);
|
|
break;
|
|
|
|
case T_NSAP:
|
|
fprintf(file, "\tnsap = %s\n", inet_nsap_ntoa(dlen, cp, NULL));
|
|
cp += dlen;
|
|
break;
|
|
|
|
case T_AAAA: {
|
|
char t[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"];
|
|
|
|
BOUNDS_CHECK(cp, IN6ADDRSZ);
|
|
fprintf(file, "\tIPv6 address = %s\n",
|
|
inet_ntop(AF_INET6, cp, t, sizeof t));
|
|
cp += IN6ADDRSZ;
|
|
break;
|
|
}
|
|
|
|
case T_WKS: {
|
|
struct protoent *protoPtr;
|
|
|
|
BOUNDS_CHECK(cp, INADDRSZ + 1);
|
|
if (!debug)
|
|
(void) putc('\n', file);
|
|
memcpy(&inaddr, cp, INADDRSZ);
|
|
cp += INADDRSZ;
|
|
if ((protoPtr = getprotobynumber(*cp)) != NULL) {
|
|
fprintf(file,"\tinet address = %s, protocol = %s\n\t",
|
|
inet_ntoa(inaddr), protoPtr->p_name);
|
|
} else {
|
|
fprintf(file,"\tinet address = %s, protocol = %d\n\t",
|
|
inet_ntoa(inaddr), *cp);
|
|
}
|
|
cp++;
|
|
n = 0;
|
|
while (cp < cp1 + dlen) {
|
|
c = *cp++;
|
|
do {
|
|
struct servent *s;
|
|
|
|
if (c & 0200) {
|
|
s = getservbyport((int)htons(n),
|
|
protoPtr ? protoPtr->p_name : NULL);
|
|
if (s != NULL) {
|
|
fprintf(file," %s", s->s_name);
|
|
} else {
|
|
fprintf(file," #%d", n);
|
|
}
|
|
}
|
|
c <<= 1;
|
|
} while (++n & 07);
|
|
}
|
|
putc('\n',file);
|
|
break;
|
|
}
|
|
|
|
case T_NULL:
|
|
fprintf(file, "\tNULL (dlen %d)\n", dlen);
|
|
cp += dlen;
|
|
break;
|
|
|
|
case T_NXT:
|
|
case T_SIG:
|
|
case T_KEY:
|
|
default: {
|
|
char buf[2048]; /* XXX need to malloc/realloc. */
|
|
char rrname[NS_MAXDNAME];
|
|
|
|
cp2 = p_fqnname(ocp, msg, NS_MAXCDNAME, rrname, sizeof rrname);
|
|
if (cp2 == NULL) {
|
|
fprintf(file, "(name truncated?)\n");
|
|
return (NULL); /* compression error */
|
|
}
|
|
|
|
if (ns_sprintrrf(msg, eom - msg, rrname, (ns_class)class,
|
|
(ns_type)type, rrttl, cp1, dlen, NULL, NULL,
|
|
buf, sizeof buf) < 0) {
|
|
perror("ns_sprintrrf");
|
|
} else {
|
|
fprintf(file,
|
|
"\trecord type %s, interpreted as:\n%s\n",
|
|
p_type(type), buf);
|
|
}
|
|
cp += dlen;
|
|
}
|
|
}
|
|
if (res.options & RES_DEBUG && type != T_SOA) {
|
|
fprintf(file,"\tttl = %lu (%s)\n", rrttl, p_time(rrttl));
|
|
}
|
|
if (cp != cp1 + dlen) {
|
|
fprintf(file,
|
|
"\n*** Error: record size incorrect (%d != %d)\n\n",
|
|
cp - cp1, dlen);
|
|
cp = NULL;
|
|
}
|
|
return (cp);
|
|
}
|