4.4BSD/usr/src/contrib/bind-4.9/tools/nslookup/debug.c
/*
* ++Copyright++ 1985, 1989
* -
* Copyright (c) 1985, 1989 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* -
* --Copyright--
*/
#ifndef lint
static char sccsid[] = "@(#)debug.c 5.26 (Berkeley) 3/21/91";
static char rcsid[] = "$Id: debug.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $";
#endif /* not lint */
/*
*******************************************************************************
*
* debug.c --
*
* Routines to print out packets received from a name server query.
*
* Modified version of 4.3BSD BIND res_debug.c 5.30 6/27/90
*
*******************************************************************************
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <resolv.h>
#include <netdb.h>
#include <stdio.h>
#include "res.h"
#include "../../conf/portability.h"
/*
* Imported from res_debug.c
*/
extern char *_res_resultcodes[];
extern char *_res_opcodes[];
/*
* Used to highlight the start of a record when printing it.
*/
#define INDENT " -> "
/*
* Print the contents of a query.
* This is intended to be primarily a debugging routine.
*/
Print_query(msg, eom, printHeader)
char *msg, *eom;
int printHeader;
{
Fprint_query(msg, eom, printHeader,stdout);
}
Fprint_query(msg, eom, printHeader,file)
char *msg, *eom;
int printHeader;
FILE *file;
{
register char *cp;
register HEADER *hp;
register int n;
short class;
short type;
/*
* Print header fields.
*/
hp = (HEADER *)msg;
cp = msg + sizeof(HEADER);
if (printHeader || (_res.options & RES_DEBUG2)) {
fprintf(file," HEADER:\n");
fprintf(file,"\topcode = %s", _res_opcodes[hp->opcode]);
fprintf(file,", id = %d", ntohs(hp->id));
fprintf(file,", rcode = %s\n", _res_resultcodes[hp->rcode]);
fprintf(file,"\theader flags: ");
if (hp->qr) {
fprintf(file," response");
} else {
fprintf(file," query");
}
if (hp->aa)
fprintf(file,", auth. answer");
if (hp->tc)
fprintf(file,", truncation");
if (hp->rd)
fprintf(file,", want recursion");
if (hp->ra)
fprintf(file,", recursion avail.");
if (hp->pr)
fprintf(file,", primary");
fprintf(file,"\n\tquestions = %d", ntohs(hp->qdcount));
fprintf(file,", answers = %d", ntohs(hp->ancount));
fprintf(file,", authority records = %d", ntohs(hp->nscount));
fprintf(file,", additional = %d\n\n", ntohs(hp->arcount));
}
/*
* Print question records.
*/
if (n = ntohs(hp->qdcount)) {
fprintf(file," QUESTIONS:\n");
while (--n >= 0) {
fprintf(file,"\t");
cp = Print_cdname(cp, msg, eom, file);
if (cp == NULL)
return;
type = _getshort(cp);
cp += sizeof(u_short);
class = _getshort(cp);
cp += sizeof(u_short);
fprintf(file,", type = %s", p_type(type));
fprintf(file,", class = %s\n", p_class(class));
}
}
/*
* Print authoritative answer records
*/
if (n = ntohs(hp->ancount)) {
fprintf(file," ANSWERS:\n");
while (--n >= 0) {
fprintf(file, INDENT);
cp = Print_rr(cp, msg, eom, file);
if (cp == NULL)
return;
}
}
/*
* print name server records
*/
if (n = ntohs(hp->nscount)) {
fprintf(file," AUTHORITY RECORDS:\n");
while (--n >= 0) {
fprintf(file, INDENT);
cp = Print_rr(cp, msg, eom, file);
if (cp == NULL)
return;
}
}
/*
* print additional records
*/
if (n = ntohs(hp->arcount)) {
fprintf(file," ADDITIONAL RECORDS:\n");
while (--n >= 0) {
fprintf(file, INDENT);
cp = Print_rr(cp, msg, eom, file);
if (cp == NULL)
return;
}
}
fprintf(file,"\n------------\n");
}
char *
Print_cdname_sub(cp, msg, eom, file, format)
u_char *cp, *msg, *eom;
FILE *file;
int format;
{
int n;
u_char name[MAXDNAME];
extern char *strcpy();
if ((n = dn_expand(msg, eom, cp, name, sizeof(name))) < 0)
return (NULL);
if (name[0] == '\0') {
(void) strcpy((char *)name, "(root)");
}
if (format) {
fprintf(file, "%-30s", name);
} else {
fputs((char *)name, file);
}
return ((char *)cp + n);
}
char *
Print_cdname(cp, msg, eom, file)
char *cp, *msg, *eom;
FILE *file;
{
return(Print_cdname_sub(cp, msg, eom, file, 0));
}
char *
Print_cdname2(cp, msg, eom, file)
char *cp, *msg, *eom;
FILE *file;
{
return(Print_cdname_sub(cp, msg, eom, file, 1));
}
/*
* Print resource record fields in human readable form.
*/
char *
Print_rr(cp, msg, eom, file)
char *cp, *msg, *eom;
FILE *file;
{
int type, class, dlen, n, c;
u_int32_t rrttl, ttl;
struct in_addr inaddr;
char *cp1, *cp2;
int debug;
if ((cp = Print_cdname(cp, msg, eom, file)) == NULL) {
fprintf(file, "(name truncated?)\n");
return (NULL); /* compression error */
}
type = _getshort(cp);
cp += sizeof(u_short);
class = _getshort(cp);
cp += sizeof(u_short);
rrttl = _getlong(cp);
cp += sizeof(u_int32_t);
dlen = _getshort(cp);
cp += sizeof(u_short);
debug = _res.options & (RES_DEBUG|RES_DEBUG2);
if (debug) {
if (_res.options & RES_DEBUG2) {
fprintf(file,"\n\ttype = %s, class = %s, dlen = %d",
p_type(type), p_class(class), dlen);
}
if (type == T_SOA) {
fprintf(file,"\n\tttl = %lu (%s)", rrttl, p_time(rrttl));
}
(void) putc('\n', file);
}
cp1 = cp;
/*
* Print type specific data, if appropriate
*/
switch (type) {
case T_A:
switch (class) {
case C_IN:
case C_HS:
bcopy(cp, (char *)&inaddr, sizeof(inaddr));
if (dlen == 4) {
fprintf(file,"\tinternet address = %s\n",
inet_ntoa(inaddr));
cp += dlen;
} else if (dlen == 7) {
fprintf(file,"\tinternet address = %s",
inet_ntoa(inaddr));
fprintf(file,", protocol = %d", cp[4]);
fprintf(file,", port = %d\n",
(cp[5] << 8) + cp[6]);
cp += dlen;
}
break;
default:
fprintf(file,"\taddress, class = %d, len = %d\n",
class, dlen);
cp += dlen;
}
break;
case T_CNAME:
fprintf(file,"\tcanonical name = ");
goto doname;
case T_MG:
fprintf(file,"\tmail group member = ");
goto doname;
case T_MB:
fprintf(file,"\tmail box = ");
goto doname;
case T_MR:
fprintf(file,"\tmailbox rename = ");
goto doname;
case T_MX:
fprintf(file,"\tpreference = %u",_getshort(cp));
cp += sizeof(u_short);
fprintf(file,", mail exchanger = ");
goto doname;
case T_NS:
fprintf(file,"\tnameserver = ");
goto doname;
case T_PTR:
fprintf(file,"\tname = ");
doname:
cp = Print_cdname(cp, msg, eom, file);
(void) putc('\n', file);
break;
case T_HINFO:
if (n = *cp++) {
fprintf(file,"\tCPU = %.*s", n, cp);
cp += n;
}
if (n = *cp++) {
fprintf(file,"\tOS = %.*s\n", n, cp);
cp += n;
}
break;
case T_SOA:
if (!debug)
(void) putc('\n', file);
fprintf(file,"\torigin = ");
cp = Print_cdname(cp, msg, eom, file);
fprintf(file,"\n\tmail addr = ");
cp = Print_cdname(cp, msg, eom, file);
fprintf(file,"\n\tserial = %lu", _getlong(cp));
cp += sizeof(u_int32_t);
ttl = _getlong(cp);
fprintf(file,"\n\trefresh = %lu (%s)", ttl, p_time(ttl));
cp += sizeof(u_int32_t);
ttl = _getlong(cp);
fprintf(file,"\n\tretry = %lu (%s)", ttl, p_time(ttl));
cp += sizeof(u_int32_t);
ttl = _getlong(cp);
fprintf(file,"\n\texpire = %lu (%s)", ttl, p_time(ttl));
cp += sizeof(u_int32_t);
ttl = _getlong(cp);
fprintf(file,
"\n\tminimum ttl = %lu (%s)\n", ttl, p_time(ttl));
cp += sizeof(u_int32_t);
break;
case T_MINFO:
if (!debug)
(void) putc('\n', file);
fprintf(file,"\trequests = ");
cp = Print_cdname(cp, msg, eom, file);
fprintf(file,"\n\terrors = ");
cp = Print_cdname(cp, msg, eom, file);
(void) putc('\n', file);
break;
case T_RP:
if (!debug)
(void) putc('\n', file);
fprintf(file,"\tmailbox = ");
cp = Print_cdname(cp, msg, eom, file);
fprintf(file,"\n\ttext = ");
cp = Print_cdname(cp, msg, eom, file);
(void) putc('\n', file);
break;
case T_TXT:
(void) fputs("\ttext = \"", file);
cp2 = cp1 + dlen;
while (cp < cp2) {
if (n = (unsigned char) *cp++) {
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_UINFO:
fprintf(file,"\tuser info = %s\n", cp);
cp += dlen;
break;
case T_UID:
case T_GID:
if (dlen == 4) {
fprintf(file,"\t%cid = %u\n",type == T_UID ? 'u' : 'g',
_getlong(cp));
cp += sizeof(int32_t);
} else {
fprintf(file,"\t%cid of length %d?\n",
type == T_UID ? 'u' : 'g', dlen);
cp += dlen;
}
break;
case T_WKS: {
struct protoent *protoPtr;
if (dlen < sizeof(u_int32_t) + 1)
break;
if (!debug)
(void) putc('\n', file);
bcopy(cp, (char *)&inaddr, sizeof(inaddr));
cp += sizeof(u_int32_t);
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;
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);
}