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542 lines
13 KiB
C
542 lines
13 KiB
C
/*
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* ++Copyright++ 1985, 1989
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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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* 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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* --Copyright--
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*/
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#ifndef lint
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static char sccsid[] = "@(#)debug.c 5.26 (Berkeley) 3/21/91";
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static char rcsid[] = "$Id: debug.c,v 1.2 1994/09/22 21:50:31 pst 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 <sys/param.h>
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#include <netinet/in.h>
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#include <netiso/iso.h>
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#include <arpa/nameser.h>
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#include <arpa/inet.h>
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#include <resolv.h>
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#include <netdb.h>
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#include <stdio.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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extern char *_res_resultcodes[];
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extern char *_res_opcodes[];
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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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Print_query(msg, eom, printHeader)
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char *msg, *eom;
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int printHeader;
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{
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Fprint_query(msg, eom, printHeader,stdout);
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}
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Fprint_query(msg, eom, printHeader,file)
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u_char *msg, *eom;
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int printHeader;
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FILE *file;
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{
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register u_char *cp;
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register HEADER *hp;
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register int n;
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short class;
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short 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", _res_resultcodes[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->pr)
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fprintf(file,", primary");
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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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if (n = ntohs(hp->qdcount)) {
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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 = _getshort((u_char*)cp);
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cp += INT16SZ;
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class = _getshort((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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if (n = ntohs(hp->ancount)) {
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fprintf(file," ANSWERS:\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 name server records
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*/
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if (n = ntohs(hp->nscount)) {
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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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if (n = ntohs(hp->arcount)) {
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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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u_char *
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Print_cdname_sub(cp, msg, eom, file, format)
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u_char *cp, *msg, *eom;
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FILE *file;
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int format;
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{
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int n;
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char name[MAXDNAME];
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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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(void) strcpy(name, "(root)");
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}
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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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}
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return (cp + n);
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}
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u_char *
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Print_cdname(cp, msg, eom, file)
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u_char *cp, *msg, *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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u_char *
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Print_cdname2(cp, msg, eom, file)
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u_char *cp, *msg, *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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/*
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* Print resource record fields in human readable form.
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*/
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u_char *
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Print_rr(cp, msg, eom, file)
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u_char *cp, *msg, *eom;
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FILE *file;
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{
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int type, class, dlen, n, c;
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u_int32_t rrttl, ttl;
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struct in_addr inaddr;
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struct iso_addr isoa;
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u_char *cp1, *cp2;
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int debug;
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if ((cp = Print_cdname(cp, 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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type = _getshort((u_char*)cp);
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cp += INT16SZ;
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class = _getshort((u_char*)cp);
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cp += INT16SZ;
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rrttl = _getlong((u_char*)cp);
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cp += INT32SZ;
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dlen = _getshort((u_char*)cp);
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cp += INT16SZ;
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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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}
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if (type == T_SOA) {
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fprintf(file,"\n\tttl = %lu (%s)", rrttl, p_time(rrttl));
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}
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(void) 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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switch (class) {
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case C_IN:
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case C_HS:
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bcopy(cp, (char *)&inaddr, INADDRSZ);
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if (dlen == 4) {
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fprintf(file,"\tinternet address = %s\n",
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inet_ntoa(inaddr));
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cp += dlen;
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} else if (dlen == 7) {
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fprintf(file,"\tinternet address = %s",
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inet_ntoa(inaddr));
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fprintf(file,", protocol = %d", cp[4]);
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fprintf(file,", port = %d\n",
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(cp[5] << 8) + cp[6]);
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cp += dlen;
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}
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break;
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default:
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fprintf(file,"\taddress, class = %d, len = %d\n",
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class, dlen);
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cp += dlen;
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}
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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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fprintf(file,"\tpreference = %u",_getshort((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_RT:
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fprintf(file,"\tpreference = %u",_getshort((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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fprintf(file,"\tsubtype = %d",_getshort((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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(void) putc('\n', file);
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break;
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case T_HINFO:
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if (n = *cp++) {
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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 (n = *cp++) {
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fprintf(file,"\tOS = %.*s\n", n, cp);
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cp += n;
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}
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break;
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case T_ISDN:
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if (n = *cp++) {
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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 (n = *cp++) {
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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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(void) 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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fprintf(file,"\n\tmail addr = ");
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cp = Print_cdname(cp, msg, eom, file);
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fprintf(file,"\n\tserial = %lu", _getlong((u_char*)cp));
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cp += INT32SZ;
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ttl = _getlong((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 = _getlong((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 = _getlong((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 = _getlong((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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(void) 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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fprintf(file,"\n\terrors = ");
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cp = Print_cdname(cp, msg, eom, file);
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(void) putc('\n', file);
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break;
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case T_RP:
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if (!debug)
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(void) putc('\n', file);
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fprintf(file,"\tmailbox = ");
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cp = Print_cdname(cp, msg, eom, file);
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fprintf(file,"\n\ttext = ");
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cp = Print_cdname(cp, msg, eom, file);
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(void) putc('\n', file);
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break;
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case T_TXT:
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(void) fputs("\ttext = \"", file);
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cp2 = cp1 + dlen;
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while (cp < cp2) {
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if (n = (unsigned char) *cp++) {
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for (c = n; c > 0 && cp < cp2; c--)
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if (*cp == '\n') {
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(void) putc('\\', file);
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(void) putc(*cp++, file);
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} else
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(void) putc(*cp++, file);
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}
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}
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(void) fputs("\"\n", file);
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break;
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case T_X25:
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(void) fputs("\tX25 = \"", file);
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cp2 = cp1 + dlen;
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while (cp < cp2) {
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if (n = (unsigned char) *cp++) {
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for (c = n; c > 0 && cp < cp2; c--)
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if (*cp == '\n') {
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(void) putc('\\', file);
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(void) putc(*cp++, file);
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} else
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(void) putc(*cp++, file);
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}
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}
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(void) fputs("\"\n", file);
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break;
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case T_NSAP:
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isoa.isoa_len = dlen;
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if (isoa.isoa_len > sizeof(isoa.isoa_genaddr))
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isoa.isoa_len = sizeof(isoa.isoa_genaddr);
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bcopy(cp, isoa.isoa_genaddr, isoa.isoa_len);
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fprintf(file, "\tnsap = %s\n", iso_ntoa(&isoa));
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cp += dlen;
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break;
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case T_UINFO:
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fprintf(file,"\tuser info = %s\n", cp);
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cp += dlen;
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break;
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case T_UID:
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case T_GID:
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if (dlen == 4) {
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fprintf(file,"\t%cid = %u\n",type == T_UID ? 'u' : 'g',
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_getlong((u_char*)cp));
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cp += INT32SZ;
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} else {
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fprintf(file,"\t%cid of length %d?\n",
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type == T_UID ? 'u' : 'g', dlen);
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cp += dlen;
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}
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break;
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case T_WKS: {
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struct protoent *protoPtr;
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if (dlen < INT32SZ + 1)
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break;
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if (!debug)
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(void) putc('\n', file);
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bcopy(cp, (char *)&inaddr, INADDRSZ);
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cp += INT32SZ;
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if ((protoPtr = getprotobynumber(*cp)) != NULL) {
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fprintf(file,"\tinet address = %s, protocol = %s\n\t",
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inet_ntoa(inaddr), protoPtr->p_name);
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} else {
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fprintf(file,"\tinet address = %s, protocol = %d\n\t",
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inet_ntoa(inaddr), *cp);
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}
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cp++;
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n = 0;
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while (cp < cp1 + dlen) {
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c = *cp++;
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do {
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struct servent *s;
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|
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if (c & 0200) {
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s = getservbyport((int)htons(n),
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protoPtr ? protoPtr->p_name : NULL);
|
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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;
|
||
|
||
default:
|
||
fprintf(file,"\t??? unknown type %d ???\n", type);
|
||
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);
|
||
}
|