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glibc/resolv/res_debug.c

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/*
* ++Copyright++ 1985, 1990, 1993
* -
* Copyright (c) 1985, 1990, 1993
* The 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--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <stdio.h>
#include <netdb.h>
#include <resolv.h>
#if defined(BSD) && (BSD >= 199103)
# include <string.h>
#else
# include "../conf/portability.h"
#endif
#if defined(USE_OPTIONS_H)
# include "../conf/options.h"
#endif
const char *_res_opcodes[] = {
"QUERY",
"IQUERY",
"CQUERYM",
"CQUERYU", /* experimental */
"NOTIFY", /* experimental */
"5",
"6",
"7",
"8",
"UPDATEA",
"UPDATED",
"UPDATEDA",
"UPDATEM",
"UPDATEMA",
"ZONEINIT",
"ZONEREF",
};
const char *_res_resultcodes[] = {
"NOERROR",
"FORMERR",
"SERVFAIL",
"NXDOMAIN",
"NOTIMP",
"REFUSED",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"NOCHANGE",
};
/* XXX: we should use getservbyport() instead. */
static const char *
dewks(wks)
int wks;
{
static char nbuf[20];
switch (wks) {
case 5: return "rje";
case 7: return "echo";
case 9: return "discard";
case 11: return "systat";
case 13: return "daytime";
case 15: return "netstat";
case 17: return "qotd";
case 19: return "chargen";
case 20: return "ftp-data";
case 21: return "ftp";
case 23: return "telnet";
case 25: return "smtp";
case 37: return "time";
case 39: return "rlp";
case 42: return "name";
case 43: return "whois";
case 53: return "domain";
case 57: return "apts";
case 59: return "apfs";
case 67: return "bootps";
case 68: return "bootpc";
case 69: return "tftp";
case 77: return "rje";
case 79: return "finger";
case 87: return "link";
case 95: return "supdup";
case 100: return "newacct";
case 101: return "hostnames";
case 102: return "iso-tsap";
case 103: return "x400";
case 104: return "x400-snd";
case 105: return "csnet-ns";
case 109: return "pop-2";
case 111: return "sunrpc";
case 113: return "auth";
case 115: return "sftp";
case 117: return "uucp-path";
case 119: return "nntp";
case 121: return "erpc";
case 123: return "ntp";
case 133: return "statsrv";
case 136: return "profile";
case 144: return "NeWS";
case 161: return "snmp";
case 162: return "snmp-trap";
case 170: return "print-srv";
default: (void) sprintf(nbuf, "%d", wks); return (nbuf);
}
}
/* XXX: we should use getprotobynumber() instead. */
static const char *
deproto(protonum)
int protonum;
{
static char nbuf[20];
switch (protonum) {
case 1: return "icmp";
case 2: return "igmp";
case 3: return "ggp";
case 5: return "st";
case 6: return "tcp";
case 7: return "ucl";
case 8: return "egp";
case 9: return "igp";
case 11: return "nvp-II";
case 12: return "pup";
case 16: return "chaos";
case 17: return "udp";
default: (void) sprintf(nbuf, "%d", protonum); return (nbuf);
}
}
static const u_char *
do_rrset(msg, len, cp, cnt, pflag, file, hs)
int cnt, pflag, len;
const u_char *cp, *msg;
const char *hs;
FILE *file;
{
int n;
int sflag;
/*
* Print answer records.
*/
sflag = (_res.pfcode & pflag);
if (n = ntohs(cnt)) {
if ((!_res.pfcode) ||
((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
fprintf(file, hs);
while (--n >= 0) {
if ((!_res.pfcode) || sflag) {
cp = p_rr(cp, msg, file);
} else {
unsigned int dlen;
cp += __dn_skipname(cp, cp + MAXCDNAME);
cp += INT16SZ;
cp += INT16SZ;
cp += INT32SZ;
dlen = _getshort((u_char*)cp);
cp += INT16SZ;
cp += dlen;
}
if ((cp - msg) > len)
return (NULL);
}
if ((!_res.pfcode) ||
((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
putc('\n', file);
}
return (cp);
}
void
__p_query(msg)
const u_char *msg;
{
__fp_query(msg, stdout);
}
#ifdef ultrix
/* ultrix 4.0's packaging has some icky packaging. alias for it here.
* there is more junk of this kind over in res_comp.c.
*/
void
p_query(msg)
const u_char *msg;
{
__p_query(msg);
}
#endif
/*
* Print the current options.
* This is intended to be primarily a debugging routine.
*/
void
__fp_resstat(statp, file)
struct __res_state *statp;
FILE *file;
{
register u_long mask;
fprintf(file, ";; res options:");
if (!statp)
statp = &_res;
for (mask = 1; mask != 0; mask <<= 1)
if (statp->options & mask)
fprintf(file, " %s", p_option(mask));
putc('\n', file);
}
/*
* Print the contents of a query.
* This is intended to be primarily a debugging routine.
*/
void
__fp_nquery(msg, len, file)
const u_char *msg;
int len;
FILE *file;
{
register const u_char *cp, *endMark;
register const HEADER *hp;
register int n;
if ((_res.options & RES_INIT) == 0 && res_init() == -1)
return;
#define TruncTest(x) if (x >= endMark) goto trunc
#define ErrorTest(x) if (x == NULL) goto error
/*
* Print header fields.
*/
hp = (HEADER *)msg;
cp = msg + HFIXEDSZ;
endMark = cp + len;
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX) || hp->rcode) {
fprintf(file, ";; ->>HEADER<<- opcode: %s, status: %s, id: %d",
_res_opcodes[hp->opcode],
_res_resultcodes[hp->rcode],
ntohs(hp->id));
putc('\n', file);
}
putc(';', file);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD2)) {
fprintf(file, "; 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 ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD1)) {
fprintf(file, "; Ques: %d", ntohs(hp->qdcount));
fprintf(file, ", Ans: %d", ntohs(hp->ancount));
fprintf(file, ", Auth: %d", ntohs(hp->nscount));
fprintf(file, ", Addit: %d", ntohs(hp->arcount));
}
if ((!_res.pfcode) || (_res.pfcode &
(RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
putc('\n',file);
}
/*
* Print question records.
*/
if (n = ntohs(hp->qdcount)) {
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
fprintf(file, ";; QUESTIONS:\n");
while (--n >= 0) {
fprintf(file, ";;\t");
TruncTest(cp);
cp = p_cdnname(cp, msg, len, file);
ErrorTest(cp);
TruncTest(cp);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
fprintf(file, ", type = %s",
__p_type(_getshort((u_char*)cp)));
cp += INT16SZ;
TruncTest(cp);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
fprintf(file, ", class = %s\n",
__p_class(_getshort((u_char*)cp)));
cp += INT16SZ;
putc('\n', file);
}
}
/*
* Print authoritative answer records
*/
TruncTest(cp);
cp = do_rrset(msg, len, cp, hp->ancount, RES_PRF_ANS, file,
";; ANSWERS:\n");
ErrorTest(cp);
/*
* print name server records
*/
TruncTest(cp);
cp = do_rrset(msg, len, cp, hp->nscount, RES_PRF_AUTH, file,
";; AUTHORITY RECORDS:\n");
ErrorTest(cp);
TruncTest(cp);
/*
* print additional records
*/
cp = do_rrset(msg, len, cp, hp->arcount, RES_PRF_ADD, file,
";; ADDITIONAL RECORDS:\n");
ErrorTest(cp);
return;
trunc:
fprintf(file, "\n;; ...truncated\n");
return;
error:
fprintf(file, "\n;; ...malformed\n");
}
void
__fp_query(msg, file)
const u_char *msg;
FILE *file;
{
fp_nquery(msg, PACKETSZ, file);
}
const u_char *
__p_cdnname(cp, msg, len, file)
const u_char *cp, *msg;
int len;
FILE *file;
{
char name[MAXDNAME];
int n;
if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
return (NULL);
if (name[0] == '\0')
putc('.', file);
else
fputs(name, file);
return (cp + n);
}
const u_char *
__p_cdname(cp, msg, file)
const u_char *cp, *msg;
FILE *file;
{
return (p_cdnname(cp, msg, PACKETSZ, file));
}
/* XXX: the rest of these functions need to become length-limited, too. (vix)
*/
const u_char *
__p_fqname(cp, msg, file)
const u_char *cp, *msg;
FILE *file;
{
char name[MAXDNAME];
int n;
if ((n = dn_expand(msg, cp + MAXCDNAME, cp, name, sizeof name)) < 0)
return (NULL);
if (name[0] == '\0') {
putc('.', file);
} else {
fputs(name, file);
if (name[strlen(name) - 1] != '.')
putc('.', file);
}
return (cp + n);
}
/*
* Print resource record fields in human readable form.
*/
const u_char *
__p_rr(cp, msg, file)
const u_char *cp, *msg;
FILE *file;
{
int type, class, dlen, n, c;
struct in_addr inaddr;
const u_char *cp1, *cp2;
u_int32_t tmpttl, t;
int lcnt;
if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
h_errno = NETDB_INTERNAL;
return (NULL);
}
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL); /* compression error */
type = _getshort((u_char*)cp);
cp += INT16SZ;
class = _getshort((u_char*)cp);
cp += INT16SZ;
tmpttl = _getlong((u_char*)cp);
cp += INT32SZ;
dlen = _getshort((u_char*)cp);
cp += INT16SZ;
cp1 = cp;
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_TTLID))
fprintf(file, "\t%lu", (u_long)tmpttl);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_CLASS))
fprintf(file, "\t%s", __p_class(class));
fprintf(file, "\t%s", __p_type(type));
/*
* Print type specific data, if appropriate
*/
switch (type) {
case T_A:
switch (class) {
case C_IN:
case C_HS:
bcopy(cp, (char *)&inaddr, INADDRSZ);
if (dlen == 4) {
fprintf(file, "\t%s", inet_ntoa(inaddr));
cp += dlen;
} else if (dlen == 7) {
char *address;
u_char protocol;
u_short port;
address = inet_ntoa(inaddr);
cp += INADDRSZ;
protocol = *(u_char*)cp;
cp += sizeof(u_char);
port = _getshort((u_char*)cp);
cp += INT16SZ;
fprintf(file, "\t%s\t; proto %d, port %d",
address, protocol, port);
}
break;
default:
cp += dlen;
}
break;
case T_CNAME:
case T_MB:
case T_MG:
case T_MR:
case T_NS:
case T_PTR:
putc('\t', file);
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
break;
case T_HINFO:
case T_ISDN:
cp2 = cp + dlen;
if (n = *cp++) {
fprintf(file, "\t%.*s", n, cp);
cp += n;
}
if ((cp < cp2) && (n = *cp++)) {
fprintf(file, "\t%.*s", n, cp);
cp += n;
} else if (type == T_HINFO)
fprintf(file, "\n;; *** Warning *** OS-type missing");
break;
case T_SOA:
putc('\t', file);
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
putc(' ', file);
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
fputs(" (\n", file);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file, "\t\t\t%lu\t; serial\n", (u_long)t);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file, "\t\t\t%lu\t; refresh (%s)\n",
(u_long)t, __p_time(t));
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file, "\t\t\t%lu\t; retry (%s)\n",
(u_long)t, __p_time(t));
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file, "\t\t\t%lu\t; expire (%s)\n",
(u_long)t, __p_time(t));
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file, "\t\t\t%lu )\t; minimum (%s)",
(u_long)t, __p_time(t));
break;
case T_MX:
case T_AFSDB:
case T_RT:
fprintf(file, "\t%d ", _getshort((u_char*)cp));
cp += INT16SZ;
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
break;
case T_PX:
fprintf(file, "\t%d ", _getshort((u_char*)cp));
cp += INT16SZ;
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
putc(' ', file);
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
break;
case T_TXT:
case T_X25:
(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') || (*cp == '"')) {
(void) putc('\\', file);
(void) putc(*cp++, file);
} else
(void) putc(*cp++, file);
}
}
putc('"', file);
break;
case T_NSAP:
(void) fprintf(file, "\t%s", inet_nsap_ntoa(dlen, cp, NULL));
cp += dlen;
break;
case T_MINFO:
case T_RP:
putc('\t', file);
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
putc(' ', file);
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL);
break;
case T_UINFO:
putc('\t', file);
fputs((char *)cp, file);
cp += dlen;
break;
case T_UID:
case T_GID:
if (dlen == 4) {
fprintf(file, "\t%u", _getlong((u_char*)cp));
cp += INT32SZ;
}
break;
case T_WKS:
if (dlen < INT32SZ + 1)
break;
bcopy(cp, (char *)&inaddr, INADDRSZ);
cp += INT32SZ;
fprintf(file, "\t%s %s ( ",
inet_ntoa(inaddr),
deproto((int) *cp));
cp += sizeof(u_char);
n = 0;
lcnt = 0;
while (cp < cp1 + dlen) {
c = *cp++;
do {
if (c & 0200) {
if (lcnt == 0) {
fputs("\n\t\t\t", file);
lcnt = 5;
}
fputs(dewks(n), file);
putc(' ', file);
lcnt--;
}
c <<= 1;
} while (++n & 07);
}
putc(')', file);
break;
#ifdef ALLOW_T_UNSPEC
case T_UNSPEC:
{
int NumBytes = 8;
u_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);
cp += dlen;
}
break;
#endif /* ALLOW_T_UNSPEC */
default:
fprintf(file, "\t?%d?", type);
cp += dlen;
}
#if 0
fprintf(file, "\t; dlen=%d, ttl %s\n", dlen, __p_time(tmpttl));
#else
putc('\n', file);
#endif
if (cp - cp1 != dlen) {
fprintf(file, ";; packet size error (found %d, dlen was %d)\n",
cp - cp1, dlen);
cp = NULL;
}
return (cp);
}
/*
* Return a string for the type
*/
const char *
__p_type(type)
int type;
{
static char nbuf[20];
switch (type) {
case T_A: return "A";
case T_NS: return "NS";
case T_CNAME: return "CNAME";
case T_SOA: return "SOA";
case T_MB: return "MB";
case T_MG: return "MG";
case T_MR: return "MR";
case T_NULL: return "NULL";
case T_WKS: return "WKS";
case T_PTR: return "PTR";
case T_HINFO: return "HINFO";
case T_MINFO: return "MINFO";
case T_MX: return "MX";
case T_TXT: return "TXT";
case T_RP: return "RP";
case T_AFSDB: return "AFSDB";
case T_X25: return "X25";
case T_ISDN: return "ISDN";
case T_RT: return "RT";
case T_NSAP: return "NSAP";
case T_NSAP_PTR: return "NSAP_PTR";
case T_SIG: return "SIG";
case T_KEY: return "KEY";
case T_PX: return "PX";
case T_GPOS: return "GPOS";
case T_AAAA: return "AAAA";
case T_LOC: return "LOC";
case T_AXFR: return "AXFR";
case T_MAILB: return "MAILB";
case T_MAILA: return "MAILA";
case T_ANY: 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
*/
const char *
__p_class(class)
int class;
{
static char nbuf[20];
switch (class) {
case C_IN: return "IN";
case C_HS: return "HS";
case C_ANY: return "ANY";
default: (void)sprintf(nbuf, "%d", class); return (nbuf);
}
}
/*
* Return a mnemonic for an option
*/
const char *
__p_option(option)
u_long option;
{
static char nbuf[40];
switch (option) {
case RES_INIT: return "init";
case RES_DEBUG: return "debug";
case RES_AAONLY: return "aaonly(unimpl)";
case RES_USEVC: return "usevc";
case RES_PRIMARY: return "primry(unimpl)";
case RES_IGNTC: return "igntc";
case RES_RECURSE: return "recurs";
case RES_DEFNAMES: return "defnam";
case RES_STAYOPEN: return "styopn";
case RES_DNSRCH: return "dnsrch";
case RES_INSECURE1: return "insecure1";
case RES_INSECURE2: return "insecure2";
default: sprintf(nbuf, "?0x%lx?", (u_long)option);
return (nbuf);
}
}
/*
* Return a mnemonic for a time to live
*/
char *
__p_time(value)
u_int32_t value;
{
static char nbuf[40];
int secs, mins, hours, days;
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;
days = value;
value = 0;
#define PLURALIZE(x) x, (x == 1) ? "" : "s"
p = nbuf;
if (days) {
(void)sprintf(p, "%d day%s", PLURALIZE(days));
while (*++p);
}
if (hours) {
if (days)
*p++ = ' ';
(void)sprintf(p, "%d hour%s", PLURALIZE(hours));
while (*++p);
}
if (mins) {
if (days || hours)
*p++ = ' ';
(void)sprintf(p, "%d min%s", PLURALIZE(mins));
while (*++p);
}
if (secs || ! (days || hours || mins)) {
if (days || hours || mins)
*p++ = ' ';
(void)sprintf(p, "%d sec%s", PLURALIZE(secs));
}
return (nbuf);
}
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