2.11BSD/src/usr.sbin/named/tools/nslookup/res_debug.c
/*-
* Copyright (c) 1985, 1990 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)res_debug.c 5.30 (Berkeley) 6/27/90
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_debug.c 5.30 (Berkeley) 6/27/90";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <netinet/in.h>
#include <stdio.h>
#include <arpa/nameser.h>
#include "res.h"
extern char *p_cdname(), *p_rr(), *p_type(), *p_class(), *p_time();
extern char *inet_ntoa();
char *_res_opcodes[] = {
"QUERY",
"IQUERY",
"CQUERYM",
"CQUERYU",
"4",
"5",
"6",
"7",
"8",
"UPDATEA",
"UPDATED",
"UPDATEDA",
"UPDATEM",
"UPDATEMA",
"ZONEINIT",
"ZONEREF",
};
char *_res_resultcodes[] = {
"NOERROR",
"FORMERR",
"SERVFAIL",
"NXDOMAIN",
"NOTIMP",
"REFUSED",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"NOCHANGE",
};
p_query(msg)
char *msg;
{
fp_query(msg,stdout);
}
/*
* Print the contents of a query.
* This is intended to be primarily a debugging routine.
*/
fp_query(msg,file)
char *msg;
FILE *file;
{
register char *cp;
register HEADER *hp;
register int n;
/*
* Print header fields.
*/
hp = (HEADER *)msg;
cp = msg + sizeof(HEADER);
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," qr");
if (hp->aa)
fprintf(file," aa");
if (hp->tc)
fprintf(file," tc");
if (hp->rd)
fprintf(file," rd");
if (hp->ra)
fprintf(file," ra");
if (hp->pr)
fprintf(file," pr");
fprintf(file,"\n\tqdcount = %d", ntohs(hp->qdcount));
fprintf(file,", ancount = %d", ntohs(hp->ancount));
fprintf(file,", nscount = %d", ntohs(hp->nscount));
fprintf(file,", arcount = %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 = p_cdname(cp, msg, file);
if (cp == NULL)
return;
fprintf(file,", type = %s", p_type(_getshort(cp)));
cp += sizeof(u_short);
fprintf(file,", class = %s\n\n", p_class(_getshort(cp)));
cp += sizeof(u_short);
}
}
/*
* Print authoritative answer records
*/
if (n = ntohs(hp->ancount)) {
fprintf(file,"ANSWERS:\n");
while (--n >= 0) {
fprintf(file,"\t");
cp = p_rr(cp, msg, file);
if (cp == NULL)
return;
}
}
/*
* print name server records
*/
if (n = ntohs(hp->nscount)) {
fprintf(file,"NAME SERVERS:\n");
while (--n >= 0) {
fprintf(file,"\t");
cp = p_rr(cp, msg, file);
if (cp == NULL)
return;
}
}
/*
* print additional records
*/
if (n = ntohs(hp->arcount)) {
fprintf(file,"ADDITIONAL RECORDS:\n");
while (--n >= 0) {
fprintf(file,"\t");
cp = p_rr(cp, msg, file);
if (cp == NULL)
return;
}
}
}
char *
p_cdname(cp, msg, file)
char *cp, *msg;
FILE *file;
{
char name[MAXDNAME];
int n;
if ((n = dn_expand(msg, msg + 512, cp, name, sizeof(name))) < 0)
return (NULL);
if (name[0] == '\0') {
name[0] = '.';
name[1] = '\0';
}
fputs(name, file);
return (cp + n);
}
/*
* Print resource record fields in human readable form.
*/
char *
p_rr(cp, msg, file)
char *cp, *msg;
FILE *file;
{
int type, class, dlen, n, c;
struct in_addr inaddr;
char *cp1, *cp2;
if ((cp = p_cdname(cp, msg, file)) == NULL)
return (NULL); /* compression error */
fprintf(file,"\n\ttype = %s", p_type(type = _getshort(cp)));
cp += sizeof(u_short);
fprintf(file,", class = %s", p_class(class = _getshort(cp)));
cp += sizeof(u_short);
fprintf(file,", ttl = %s", p_time(_getlong(cp)));
cp += sizeof(u_long);
fprintf(file,", dlen = %d\n", dlen = _getshort(cp));
cp += sizeof(u_short);
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:
cp += dlen;
}
break;
case T_CNAME:
case T_MB:
case T_MG:
case T_MR:
case T_NS:
case T_PTR:
fprintf(file,"\tdomain name = ");
cp = p_cdname(cp, msg, file);
fprintf(file,"\n");
break;
case T_HINFO:
if (n = *cp++) {
fprintf(file,"\tCPU=%.*s\n", n, cp);
cp += n;
}
if (n = *cp++) {
fprintf(file,"\tOS=%.*s\n", n, cp);
cp += n;
}
break;
case T_SOA:
fprintf(file,"\torigin = ");
cp = p_cdname(cp, msg, file);
fprintf(file,"\n\tmail addr = ");
cp = p_cdname(cp, msg, file);
fprintf(file,"\n\tserial = %ld", _getlong(cp));
cp += sizeof(u_long);
fprintf(file,"\n\trefresh = %s", p_time(_getlong(cp)));
cp += sizeof(u_long);
fprintf(file,"\n\tretry = %s", p_time(_getlong(cp)));
cp += sizeof(u_long);
fprintf(file,"\n\texpire = %s", p_time(_getlong(cp)));
cp += sizeof(u_long);
fprintf(file,"\n\tmin = %s\n", p_time(_getlong(cp)));
cp += sizeof(u_long);
break;
case T_MX:
fprintf(file,"\tpreference = %ld,",_getshort(cp));
cp += sizeof(u_short);
fprintf(file," name = ");
cp = p_cdname(cp, msg, file);
break;
case T_TXT:
(void) fputs("\t\"", 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_MINFO:
fprintf(file,"\trequests = ");
cp = p_cdname(cp, msg, file);
fprintf(file,"\n\terrors = ");
cp = p_cdname(cp, msg, file);
break;
case T_UINFO:
fprintf(file,"\t%s\n", cp);
cp += dlen;
break;
case T_UID:
case T_GID:
if (dlen == 4) {
fprintf(file,"\t%ld\n", _getlong(cp));
cp += sizeof(int);
}
break;
case T_WKS:
if (dlen < sizeof(u_long) + 1)
break;
bcopy(cp, (char *)&inaddr, sizeof(inaddr));
cp += sizeof(u_long);
fprintf(file,"\tinternet address = %s, protocol = %d\n\t",
inet_ntoa(inaddr), *cp++);
n = 0;
while (cp < cp1 + dlen) {
c = *cp++;
do {
if (c & 0200)
fprintf(file," %d", n);
c <<= 1;
} while (++n & 07);
}
putc('\n',file);
break;
#ifdef ALLOW_T_UNSPEC
case T_UNSPEC:
{
int NumBytes = 8;
char *DataPtr;
int i;
if (dlen < NumBytes) NumBytes = dlen;
fprintf(file, "\tFirst %d bytes of hex data:",
NumBytes);
for (i = 0, DataPtr = cp; i < NumBytes; i++, DataPtr++)
fprintf(file, " %x", *DataPtr);
fputs("\n", file);
cp += dlen;
}
break;
#endif /* ALLOW_T_UNSPEC */
default:
fprintf(file,"\t???\n");
cp += dlen;
}
if (cp != cp1 + dlen) {
fprintf(file,"packet size error (%#x != %#x)\n", cp, cp1+dlen);
cp = NULL;
}
fprintf(file,"\n");
return (cp);
}
static char nbuf[40];
/*
* Return a string for the type
*/
char *
p_type(type)
int type;
{
switch (type) {
case T_A:
return("A");
case T_NS: /* authoritative server */
return("NS");
case T_CNAME: /* canonical name */
return("CNAME");
case T_SOA: /* start of authority zone */
return("SOA");
case T_MB: /* mailbox domain name */
return("MB");
case T_MG: /* mail group member */
return("MG");
case T_MR: /* mail rename name */
return("MR");
case T_NULL: /* null resource record */
return("NULL");
case T_WKS: /* well known service */
return("WKS");
case T_PTR: /* domain name pointer */
return("PTR");
case T_HINFO: /* host information */
return("HINFO");
case T_MINFO: /* mailbox information */
return("MINFO");
case T_MX: /* mail routing info */
return("MX");
case T_TXT: /* text */
return("TXT");
case T_AXFR: /* zone transfer */
return("AXFR");
case T_MAILB: /* mail box */
return("MAILB");
case T_MAILA: /* mail address */
return("MAILA");
case T_ANY: /* matches any type */
return("ANY");
case T_UINFO:
return("UINFO");
case T_UID:
return("UID");
case T_GID:
return("GID");
#ifdef ALLOW_T_UNSPEC
case T_UNSPEC:
return("UNSPEC");
#endif /* ALLOW_T_UNSPEC */
default:
(void)sprintf(nbuf, "%d", type);
return(nbuf);
}
}
/*
* Return a mnemonic for class
*/
char *
p_class(class)
int class;
{
switch (class) {
case C_IN: /* internet class */
return("IN");
case C_HS: /* hesiod class */
return("HS");
case C_ANY: /* matches any class */
return("ANY");
default:
(void)sprintf(nbuf, "%d", class);
return(nbuf);
}
}
/*
* Return a mnemonic for a time to live
*/
char *
p_time(value)
u_long value;
{
int secs, mins, hours;
register char *p;
if (value == 0) {
strcpy(nbuf, "0 secs");
return(nbuf);
}
secs = value % 60;
value /= 60;
mins = value % 60;
value /= 60;
hours = value % 24;
value /= 24;
#define PLURALIZE(x) x, (x == 1) ? "" : "s"
p = nbuf;
if (value) {
(void)sprintf(p, "%d day%s", PLURALIZE(value));
while (*++p);
}
if (hours) {
if (value)
*p++ = ' ';
(void)sprintf(p, "%d hour%s", PLURALIZE(hours));
while (*++p);
}
if (mins) {
if (value || hours)
*p++ = ' ';
(void)sprintf(p, "%d min%s", PLURALIZE(mins));
while (*++p);
}
if (secs || ! (value || hours || mins)) {
if (value || hours || mins)
*p++ = ' ';
(void)sprintf(p, "%d sec%s", PLURALIZE(secs));
}
return(nbuf);
}