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freebsd-skq/lib/libc/resolv/res_debug.c
Hajimu UMEMOTO 54ebdd631d Merge the resolver part of BIND 9.4.3 into HEAD. 
It includes the following fix:

  2426.   [bug]           libbind: inet_net_pton() can sometimes return the
                          wrong value if excessively large netmasks are
                          supplied. [RT #18512]

Reported by:	Maksymilian Arciemowicz <cxib__at__securityreason.com>
2008-12-14 19:39:53 +00:00

1230 lines
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/*
* Copyright (c) 1985
* 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.
* 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.
*/
/*
* Portions Copyright (c) 1995 by International Business Machines, Inc.
*
* International Business Machines, Inc. (hereinafter called IBM) grants
* permission under its copyrights to use, copy, modify, and distribute this
* Software with or without fee, provided that the above copyright notice and
* all paragraphs of this notice appear in all copies, and that the name of IBM
* not be used in connection with the marketing of any product incorporating
* the Software or modifications thereof, without specific, written prior
* permission.
*
* To the extent it has a right to do so, IBM grants an immunity from suit
* under its patents, if any, for the use, sale or manufacture of products to
* the extent that such products are used for performing Domain Name System
* dynamic updates in TCP/IP networks by means of the Software. No immunity is
* granted for any product per se or for any other function of any product.
*
* THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
* DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
* IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
*/
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "$Id: res_debug.c,v 1.10.18.6 2008/04/03 23:15:15 marka Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "port_before.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
#include <errno.h>
#include <math.h>
#include <netdb.h>
#include <resolv.h>
#include <resolv_mt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "port_after.h"
#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
#else
# define SPRINTF(x) sprintf x
#endif
extern const char *_res_opcodes[];
extern const char *_res_sectioncodes[];
/*%
* Print the current options.
*/
void
fp_resstat(const res_state statp, FILE *file) {
u_long mask;
fprintf(file, ";; res options:");
for (mask = 1; mask != 0U; mask <<= 1)
if (statp->options & mask)
fprintf(file, " %s", p_option(mask));
putc('\n', file);
}
static void
do_section(const res_state statp,
ns_msg *handle, ns_sect section,
int pflag, FILE *file)
{
int n, sflag, rrnum;
static int buflen = 2048;
char *buf;
ns_opcode opcode;
ns_rr rr;
/*
* Print answer records.
*/
sflag = (statp->pfcode & pflag);
if (statp->pfcode && !sflag)
return;
buf = malloc(buflen);
if (buf == NULL) {
fprintf(file, ";; memory allocation failure\n");
return;
}
opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
rrnum = 0;
for (;;) {
if (ns_parserr(handle, section, rrnum, &rr)) {
if (errno != ENODEV)
fprintf(file, ";; ns_parserr: %s\n",
strerror(errno));
else if (rrnum > 0 && sflag != 0 &&
(statp->pfcode & RES_PRF_HEAD1))
putc('\n', file);
goto cleanup;
}
if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
fprintf(file, ";; %s SECTION:\n",
p_section(section, opcode));
if (section == ns_s_qd)
fprintf(file, ";;\t%s, type = %s, class = %s\n",
ns_rr_name(rr),
p_type(ns_rr_type(rr)),
p_class(ns_rr_class(rr)));
else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr);
u_int32_t ttl = ns_rr_ttl(rr);
fprintf(file,
"; EDNS: version: %u, udp=%u, flags=%04x\n",
(ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
while (rdatalen >= 4) {
const u_char *cp = ns_rr_rdata(rr);
int i;
GETSHORT(optcode, cp);
GETSHORT(optlen, cp);
if (optcode == NS_OPT_NSID) {
fputs("; NSID: ", file);
if (optlen == 0) {
fputs("; NSID\n", file);
} else {
fputs("; NSID: ", file);
for (i = 0; i < optlen; i++)
fprintf(file, "%02x ",
cp[i]);
fputs(" (",file);
for (i = 0; i < optlen; i++)
fprintf(file, "%c",
isprint(cp[i])?
cp[i] : '.');
fputs(")\n", file);
}
} else {
if (optlen == 0) {
fprintf(file, "; OPT=%u\n",
optcode);
} else {
fprintf(file, "; OPT=%u: ",
optcode);
for (i = 0; i < optlen; i++)
fprintf(file, "%02x ",
cp[i]);
fputs(" (",file);
for (i = 0; i < optlen; i++)
fprintf(file, "%c",
isprint(cp[i]) ?
cp[i] : '.');
fputs(")\n", file);
}
}
rdatalen -= 4 + optlen;
}
} else {
n = ns_sprintrr(handle, &rr, NULL, NULL,
buf, buflen);
if (n < 0) {
if (errno == ENOSPC) {
free(buf);
buf = NULL;
if (buflen < 131072)
buf = malloc(buflen += 1024);
if (buf == NULL) {
fprintf(file,
";; memory allocation failure\n");
return;
}
continue;
}
fprintf(file, ";; ns_sprintrr: %s\n",
strerror(errno));
goto cleanup;
}
fputs(buf, file);
fputc('\n', file);
}
rrnum++;
}
cleanup:
if (buf != NULL)
free(buf);
}
/*%
* Print the contents of a query.
* This is intended to be primarily a debugging routine.
*/
void
res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
ns_msg handle;
int qdcount, ancount, nscount, arcount;
u_int opcode, rcode, id;
if (ns_initparse(msg, len, &handle) < 0) {
fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
return;
}
opcode = ns_msg_getflag(handle, ns_f_opcode);
rcode = ns_msg_getflag(handle, ns_f_rcode);
id = ns_msg_id(handle);
qdcount = ns_msg_count(handle, ns_s_qd);
ancount = ns_msg_count(handle, ns_s_an);
nscount = ns_msg_count(handle, ns_s_ns);
arcount = ns_msg_count(handle, ns_s_ar);
/*
* Print header fields.
*/
if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
fprintf(file,
";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
_res_opcodes[opcode], p_rcode(rcode), id);
if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
putc(';', file);
if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
fprintf(file, "; flags:");
if (ns_msg_getflag(handle, ns_f_qr))
fprintf(file, " qr");
if (ns_msg_getflag(handle, ns_f_aa))
fprintf(file, " aa");
if (ns_msg_getflag(handle, ns_f_tc))
fprintf(file, " tc");
if (ns_msg_getflag(handle, ns_f_rd))
fprintf(file, " rd");
if (ns_msg_getflag(handle, ns_f_ra))
fprintf(file, " ra");
if (ns_msg_getflag(handle, ns_f_z))
fprintf(file, " ??");
if (ns_msg_getflag(handle, ns_f_ad))
fprintf(file, " ad");
if (ns_msg_getflag(handle, ns_f_cd))
fprintf(file, " cd");
}
if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
fprintf(file, "; %s: %d",
p_section(ns_s_qd, opcode), qdcount);
fprintf(file, ", %s: %d",
p_section(ns_s_an, opcode), ancount);
fprintf(file, ", %s: %d",
p_section(ns_s_ns, opcode), nscount);
fprintf(file, ", %s: %d",
p_section(ns_s_ar, opcode), arcount);
}
if ((!statp->pfcode) || (statp->pfcode &
(RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
putc('\n',file);
}
/*
* Print the various sections.
*/
do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
if (qdcount == 0 && ancount == 0 &&
nscount == 0 && arcount == 0)
putc('\n', file);
}
const u_char *
p_cdnname(const u_char *cp, const u_char *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(const u_char *cp, const u_char *msg, FILE *file) {
return (p_cdnname(cp, msg, PACKETSZ, file));
}
/*%
* Return a fully-qualified domain name from a compressed name (with
length supplied). */
const u_char *
p_fqnname(cp, msg, msglen, name, namelen)
const u_char *cp, *msg;
int msglen;
char *name;
int namelen;
{
int n, newlen;
if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
return (NULL);
newlen = strlen(name);
if (newlen == 0 || name[newlen - 1] != '.') {
if (newlen + 1 >= namelen) /*%< Lack space for final dot */
return (NULL);
else
strcpy(name + newlen, ".");
}
return (cp + n);
}
/* XXX: the rest of these functions need to become length-limited, too. */
const u_char *
p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
char name[MAXDNAME];
const u_char *n;
n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
if (n == NULL)
return (NULL);
fputs(name, file);
return (n);
}
/*%
* Names of RR classes and qclasses. Classes and qclasses are the same, except
* that C_ANY is a qclass but not a class. (You can ask for records of class
* C_ANY, but you can't have any records of that class in the database.)
*/
const struct res_sym __p_class_syms[] = {
{C_IN, "IN", (char *)0},
{C_CHAOS, "CH", (char *)0},
{C_CHAOS, "CHAOS", (char *)0},
{C_HS, "HS", (char *)0},
{C_HS, "HESIOD", (char *)0},
{C_ANY, "ANY", (char *)0},
{C_NONE, "NONE", (char *)0},
{C_IN, (char *)0, (char *)0}
};
/*%
* Names of message sections.
*/
static const struct res_sym __p_default_section_syms[] = {
{ns_s_qd, "QUERY", (char *)0},
{ns_s_an, "ANSWER", (char *)0},
{ns_s_ns, "AUTHORITY", (char *)0},
{ns_s_ar, "ADDITIONAL", (char *)0},
{0, (char *)0, (char *)0}
};
static const struct res_sym __p_update_section_syms[] = {
{S_ZONE, "ZONE", (char *)0},
{S_PREREQ, "PREREQUISITE", (char *)0},
{S_UPDATE, "UPDATE", (char *)0},
{S_ADDT, "ADDITIONAL", (char *)0},
{0, (char *)0, (char *)0}
};
const struct res_sym __p_key_syms[] = {
{NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
{NS_ALG_DH, "DH", "Diffie Hellman"},
{NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
{NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
{NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
{0, NULL, NULL}
};
const struct res_sym __p_cert_syms[] = {
{cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
{cert_t_spki, "SPKI", "SPKI certificate"},
{cert_t_pgp, "PGP", "PGP certificate"},
{cert_t_url, "URL", "URL Private"},
{cert_t_oid, "OID", "OID Private"},
{0, NULL, NULL}
};
/*%
* Names of RR types and qtypes. Types and qtypes are the same, except
* that T_ANY is a qtype but not a type. (You can ask for records of type
* T_ANY, but you can't have any records of that type in the database.)
*/
const struct res_sym __p_type_syms[] = {
{ns_t_a, "A", "address"},
{ns_t_ns, "NS", "name server"},
{ns_t_md, "MD", "mail destination (deprecated)"},
{ns_t_mf, "MF", "mail forwarder (deprecated)"},
{ns_t_cname, "CNAME", "canonical name"},
{ns_t_soa, "SOA", "start of authority"},
{ns_t_mb, "MB", "mailbox"},
{ns_t_mg, "MG", "mail group member"},
{ns_t_mr, "MR", "mail rename"},
{ns_t_null, "NULL", "null"},
{ns_t_wks, "WKS", "well-known service (deprecated)"},
{ns_t_ptr, "PTR", "domain name pointer"},
{ns_t_hinfo, "HINFO", "host information"},
{ns_t_minfo, "MINFO", "mailbox information"},
{ns_t_mx, "MX", "mail exchanger"},
{ns_t_txt, "TXT", "text"},
{ns_t_rp, "RP", "responsible person"},
{ns_t_afsdb, "AFSDB", "DCE or AFS server"},
{ns_t_x25, "X25", "X25 address"},
{ns_t_isdn, "ISDN", "ISDN address"},
{ns_t_rt, "RT", "router"},
{ns_t_nsap, "NSAP", "nsap address"},
{ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
{ns_t_sig, "SIG", "signature"},
{ns_t_key, "KEY", "key"},
{ns_t_px, "PX", "mapping information"},
{ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
{ns_t_aaaa, "AAAA", "IPv6 address"},
{ns_t_loc, "LOC", "location"},
{ns_t_nxt, "NXT", "next valid name (unimplemented)"},
{ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
{ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
{ns_t_srv, "SRV", "server selection"},
{ns_t_atma, "ATMA", "ATM address (unimplemented)"},
{ns_t_tkey, "TKEY", "tkey"},
{ns_t_tsig, "TSIG", "transaction signature"},
{ns_t_ixfr, "IXFR", "incremental zone transfer"},
{ns_t_axfr, "AXFR", "zone transfer"},
{ns_t_zxfr, "ZXFR", "compressed zone transfer"},
{ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
{ns_t_maila, "MAILA", "mail agent (deprecated)"},
{ns_t_naptr, "NAPTR", "URN Naming Authority"},
{ns_t_kx, "KX", "Key Exchange"},
{ns_t_cert, "CERT", "Certificate"},
{ns_t_a6, "A6", "IPv6 Address"},
{ns_t_dname, "DNAME", "dname"},
{ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
{ns_t_opt, "OPT", "EDNS Options"},
{ns_t_any, "ANY", "\"any\""},
{0, NULL, NULL}
};
/*%
* Names of DNS rcodes.
*/
const struct res_sym __p_rcode_syms[] = {
{ns_r_noerror, "NOERROR", "no error"},
{ns_r_formerr, "FORMERR", "format error"},
{ns_r_servfail, "SERVFAIL", "server failed"},
{ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
{ns_r_notimpl, "NOTIMP", "not implemented"},
{ns_r_refused, "REFUSED", "refused"},
{ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
{ns_r_yxrrset, "YXRRSET", "rrset exists"},
{ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
{ns_r_notauth, "NOTAUTH", "not authoritative"},
{ns_r_notzone, "NOTZONE", "Not in zone"},
{ns_r_max, "", ""},
{ns_r_badsig, "BADSIG", "bad signature"},
{ns_r_badkey, "BADKEY", "bad key"},
{ns_r_badtime, "BADTIME", "bad time"},
{0, NULL, NULL}
};
int
sym_ston(const struct res_sym *syms, const char *name, int *success) {
for ((void)NULL; syms->name != 0; syms++) {
if (strcasecmp (name, syms->name) == 0) {
if (success)
*success = 1;
return (syms->number);
}
}
if (success)
*success = 0;
return (syms->number); /*%< The default value. */
}
const char *
sym_ntos(const struct res_sym *syms, int number, int *success) {
char *unname = sym_ntos_unname;
for ((void)NULL; syms->name != 0; syms++) {
if (number == syms->number) {
if (success)
*success = 1;
return (syms->name);
}
}
sprintf(unname, "%d", number); /*%< XXX nonreentrant */
if (success)
*success = 0;
return (unname);
}
const char *
sym_ntop(const struct res_sym *syms, int number, int *success) {
char *unname = sym_ntop_unname;
for ((void)NULL; syms->name != 0; syms++) {
if (number == syms->number) {
if (success)
*success = 1;
return (syms->humanname);
}
}
sprintf(unname, "%d", number); /*%< XXX nonreentrant */
if (success)
*success = 0;
return (unname);
}
/*%
* Return a string for the type.
*/
const char *
p_type(int type) {
int success;
const char *result;
static char typebuf[20];
result = sym_ntos(__p_type_syms, type, &success);
if (success)
return (result);
if (type < 0 || type > 0xffff)
return ("BADTYPE");
sprintf(typebuf, "TYPE%d", type);
return (typebuf);
}
/*%
* Return a string for the type.
*/
const char *
p_section(int section, int opcode) {
const struct res_sym *symbols;
switch (opcode) {
case ns_o_update:
symbols = __p_update_section_syms;
break;
default:
symbols = __p_default_section_syms;
break;
}
return (sym_ntos(symbols, section, (int *)0));
}
/*%
* Return a mnemonic for class.
*/
const char *
p_class(int class) {
int success;
const char *result;
static char classbuf[20];
result = sym_ntos(__p_class_syms, class, &success);
if (success)
return (result);
if (class < 0 || class > 0xffff)
return ("BADCLASS");
sprintf(classbuf, "CLASS%d", class);
return (classbuf);
}
/*%
* Return a mnemonic for an option
*/
const char *
p_option(u_long option) {
char *nbuf = p_option_nbuf;
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";
case RES_NOALIASES: return "noaliases";
case RES_USE_INET6: return "inet6";
#ifdef RES_USE_EDNS0 /*%< KAME extension */
case RES_USE_EDNS0: return "edns0";
case RES_NSID: return "nsid";
#endif
#ifdef RES_USE_DNAME
case RES_USE_DNAME: return "dname";
#endif
#ifdef RES_USE_DNSSEC
case RES_USE_DNSSEC: return "dnssec";
#endif
#ifdef RES_NOTLDQUERY
case RES_NOTLDQUERY: return "no-tld-query";
#endif
#ifdef RES_NO_NIBBLE2
case RES_NO_NIBBLE2: return "no-nibble2";
#endif
/* XXX nonreentrant */
default: sprintf(nbuf, "?0x%lx?", (u_long)option);
return (nbuf);
}
}
/*%
* Return a mnemonic for a time to live.
*/
const char *
p_time(u_int32_t value) {
char *nbuf = p_time_nbuf;
if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)
sprintf(nbuf, "%u", value);
return (nbuf);
}
/*%
* Return a string for the rcode.
*/
const char *
p_rcode(int rcode) {
return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
}
/*%
* Return a string for a res_sockaddr_union.
*/
const char *
p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
switch (u.sin.sin_family) {
case AF_INET:
inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret);
break;
#ifdef HAS_INET6_STRUCTS
case AF_INET6:
inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
break;
#endif
default:
sprintf(ret, "[af%d]", u.sin.sin_family);
break;
}
if (size > 0U) {
strncpy(buf, ret, size - 1);
buf[size - 1] = '0';
}
return (buf);
}
/*%
* routines to convert between on-the-wire RR format and zone file format.
* Does not contain conversion to/from decimal degrees; divide or multiply
* by 60*60*1000 for that.
*/
static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
1000000,10000000,100000000,1000000000};
/*% takes an XeY precision/size value, returns a string representation. */
static const char *
precsize_ntoa(prec)
u_int8_t prec;
{
char *retbuf = precsize_ntoa_retbuf;
unsigned long val;
int mantissa, exponent;
mantissa = (int)((prec >> 4) & 0x0f) % 10;
exponent = (int)((prec >> 0) & 0x0f) % 10;
val = mantissa * poweroften[exponent];
(void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
return (retbuf);
}
/*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
static u_int8_t
precsize_aton(const char **strptr) {
unsigned int mval = 0, cmval = 0;
u_int8_t retval = 0;
const char *cp;
int exponent;
int mantissa;
cp = *strptr;
while (isdigit((unsigned char)*cp))
mval = mval * 10 + (*cp++ - '0');
if (*cp == '.') { /*%< centimeters */
cp++;
if (isdigit((unsigned char)*cp)) {
cmval = (*cp++ - '0') * 10;
if (isdigit((unsigned char)*cp)) {
cmval += (*cp++ - '0');
}
}
}
cmval = (mval * 100) + cmval;
for (exponent = 0; exponent < 9; exponent++)
if (cmval < poweroften[exponent+1])
break;
mantissa = cmval / poweroften[exponent];
if (mantissa > 9)
mantissa = 9;
retval = (mantissa << 4) | exponent;
*strptr = cp;
return (retval);
}
/*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
static u_int32_t
latlon2ul(const char **latlonstrptr, int *which) {
const char *cp;
u_int32_t retval;
int deg = 0, min = 0, secs = 0, secsfrac = 0;
cp = *latlonstrptr;
while (isdigit((unsigned char)*cp))
deg = deg * 10 + (*cp++ - '0');
while (isspace((unsigned char)*cp))
cp++;
if (!(isdigit((unsigned char)*cp)))
goto fndhemi;
while (isdigit((unsigned char)*cp))
min = min * 10 + (*cp++ - '0');
while (isspace((unsigned char)*cp))
cp++;
if (!(isdigit((unsigned char)*cp)))
goto fndhemi;
while (isdigit((unsigned char)*cp))
secs = secs * 10 + (*cp++ - '0');
if (*cp == '.') { /*%< decimal seconds */
cp++;
if (isdigit((unsigned char)*cp)) {
secsfrac = (*cp++ - '0') * 100;
if (isdigit((unsigned char)*cp)) {
secsfrac += (*cp++ - '0') * 10;
if (isdigit((unsigned char)*cp)) {
secsfrac += (*cp++ - '0');
}
}
}
}
while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
cp++;
while (isspace((unsigned char)*cp))
cp++;
fndhemi:
switch (*cp) {
case 'N': case 'n':
case 'E': case 'e':
retval = ((unsigned)1<<31)
+ (((((deg * 60) + min) * 60) + secs) * 1000)
+ secsfrac;
break;
case 'S': case 's':
case 'W': case 'w':
retval = ((unsigned)1<<31)
- (((((deg * 60) + min) * 60) + secs) * 1000)
- secsfrac;
break;
default:
retval = 0; /*%< invalid value -- indicates error */
break;
}
switch (*cp) {
case 'N': case 'n':
case 'S': case 's':
*which = 1; /*%< latitude */
break;
case 'E': case 'e':
case 'W': case 'w':
*which = 2; /*%< longitude */
break;
default:
*which = 0; /*%< error */
break;
}
cp++; /*%< skip the hemisphere */
while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
cp++;
while (isspace((unsigned char)*cp)) /*%< move to next field */
cp++;
*latlonstrptr = cp;
return (retval);
}
/*%
* converts a zone file representation in a string to an RDATA on-the-wire
* representation. */
int
loc_aton(ascii, binary)
const char *ascii;
u_char *binary;
{
const char *cp, *maxcp;
u_char *bcp;
u_int32_t latit = 0, longit = 0, alt = 0;
u_int32_t lltemp1 = 0, lltemp2 = 0;
int altmeters = 0, altfrac = 0, altsign = 1;
u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */
u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */
u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */
int which1 = 0, which2 = 0;
cp = ascii;
maxcp = cp + strlen(ascii);
lltemp1 = latlon2ul(&cp, &which1);
lltemp2 = latlon2ul(&cp, &which2);
switch (which1 + which2) {
case 3: /*%< 1 + 2, the only valid combination */
if ((which1 == 1) && (which2 == 2)) { /*%< normal case */
latit = lltemp1;
longit = lltemp2;
} else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */
longit = lltemp1;
latit = lltemp2;
} else { /*%< some kind of brokenness */
return (0);
}
break;
default: /*%< we didn't get one of each */
return (0);
}
/* altitude */
if (*cp == '-') {
altsign = -1;
cp++;
}
if (*cp == '+')
cp++;
while (isdigit((unsigned char)*cp))
altmeters = altmeters * 10 + (*cp++ - '0');
if (*cp == '.') { /*%< decimal meters */
cp++;
if (isdigit((unsigned char)*cp)) {
altfrac = (*cp++ - '0') * 10;
if (isdigit((unsigned char)*cp)) {
altfrac += (*cp++ - '0');
}
}
}
alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
cp++;
while (isspace((unsigned char)*cp) && (cp < maxcp))
cp++;
if (cp >= maxcp)
goto defaults;
siz = precsize_aton(&cp);
while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
cp++;
while (isspace((unsigned char)*cp) && (cp < maxcp))
cp++;
if (cp >= maxcp)
goto defaults;
hp = precsize_aton(&cp);
while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
cp++;
while (isspace((unsigned char)*cp) && (cp < maxcp))
cp++;
if (cp >= maxcp)
goto defaults;
vp = precsize_aton(&cp);
defaults:
bcp = binary;
*bcp++ = (u_int8_t) 0; /*%< version byte */
*bcp++ = siz;
*bcp++ = hp;
*bcp++ = vp;
PUTLONG(latit,bcp);
PUTLONG(longit,bcp);
PUTLONG(alt,bcp);
return (16); /*%< size of RR in octets */
}
/*% takes an on-the-wire LOC RR and formats it in a human readable format. */
const char *
loc_ntoa(binary, ascii)
const u_char *binary;
char *ascii;
{
static const char *error = "?";
static char tmpbuf[sizeof
"1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
const u_char *cp = binary;
int latdeg, latmin, latsec, latsecfrac;
int longdeg, longmin, longsec, longsecfrac;
char northsouth, eastwest;
const char *altsign;
int altmeters, altfrac;
const u_int32_t referencealt = 100000 * 100;
int32_t latval, longval, altval;
u_int32_t templ;
u_int8_t sizeval, hpval, vpval, versionval;
char *sizestr, *hpstr, *vpstr;
versionval = *cp++;
if (ascii == NULL)
ascii = tmpbuf;
if (versionval) {
(void) sprintf(ascii, "; error: unknown LOC RR version");
return (ascii);
}
sizeval = *cp++;
hpval = *cp++;
vpval = *cp++;
GETLONG(templ, cp);
latval = (templ - ((unsigned)1<<31));
GETLONG(templ, cp);
longval = (templ - ((unsigned)1<<31));
GETLONG(templ, cp);
if (templ < referencealt) { /*%< below WGS 84 spheroid */
altval = referencealt - templ;
altsign = "-";
} else {
altval = templ - referencealt;
altsign = "";
}
if (latval < 0) {
northsouth = 'S';
latval = -latval;
} else
northsouth = 'N';
latsecfrac = latval % 1000;
latval = latval / 1000;
latsec = latval % 60;
latval = latval / 60;
latmin = latval % 60;
latval = latval / 60;
latdeg = latval;
if (longval < 0) {
eastwest = 'W';
longval = -longval;
} else
eastwest = 'E';
longsecfrac = longval % 1000;
longval = longval / 1000;
longsec = longval % 60;
longval = longval / 60;
longmin = longval % 60;
longval = longval / 60;
longdeg = longval;
altfrac = altval % 100;
altmeters = (altval / 100);
sizestr = strdup(precsize_ntoa(sizeval));
hpstr = strdup(precsize_ntoa(hpval));
vpstr = strdup(precsize_ntoa(vpval));
sprintf(ascii,
"%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
latdeg, latmin, latsec, latsecfrac, northsouth,
longdeg, longmin, longsec, longsecfrac, eastwest,
altsign, altmeters, altfrac,
(sizestr != NULL) ? sizestr : error,
(hpstr != NULL) ? hpstr : error,
(vpstr != NULL) ? vpstr : error);
if (sizestr != NULL)
free(sizestr);
if (hpstr != NULL)
free(hpstr);
if (vpstr != NULL)
free(vpstr);
return (ascii);
}
/*% Return the number of DNS hierarchy levels in the name. */
int
dn_count_labels(const char *name) {
int i, len, count;
len = strlen(name);
for (i = 0, count = 0; i < len; i++) {
/* XXX need to check for \. or use named's nlabels(). */
if (name[i] == '.')
count++;
}
/* don't count initial wildcard */
if (name[0] == '*')
if (count)
count--;
/* don't count the null label for root. */
/* if terminating '.' not found, must adjust */
/* count to include last label */
if (len > 0 && name[len-1] != '.')
count++;
return (count);
}
/*%
* Make dates expressed in seconds-since-Jan-1-1970 easy to read.
* SIG records are required to be printed like this, by the Secure DNS RFC.
*/
char *
p_secstodate (u_long secs) {
char *output = p_secstodate_output;
time_t clock = secs;
struct tm *time;
#ifdef HAVE_TIME_R
struct tm res;
time = gmtime_r(&clock, &res);
#else
time = gmtime(&clock);
#endif
time->tm_year += 1900;
time->tm_mon += 1;
sprintf(output, "%04d%02d%02d%02d%02d%02d",
time->tm_year, time->tm_mon, time->tm_mday,
time->tm_hour, time->tm_min, time->tm_sec);
return (output);
}
u_int16_t
res_nametoclass(const char *buf, int *successp) {
unsigned long result;
char *endptr;
int success;
result = sym_ston(__p_class_syms, buf, &success);
if (success)
goto done;
if (strncasecmp(buf, "CLASS", 5) != 0 ||
!isdigit((unsigned char)buf[5]))
goto done;
errno = 0;
result = strtoul(buf + 5, &endptr, 10);
if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
success = 1;
done:
if (successp)
*successp = success;
return (result);
}
u_int16_t
res_nametotype(const char *buf, int *successp) {
unsigned long result;
char *endptr;
int success;
result = sym_ston(__p_type_syms, buf, &success);
if (success)
goto done;
if (strncasecmp(buf, "type", 4) != 0 ||
!isdigit((unsigned char)buf[4]))
goto done;
errno = 0;
result = strtoul(buf + 4, &endptr, 10);
if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
success = 1;
done:
if (successp)
*successp = success;
return (result);
}
/*
* Weak aliases for applications that use certain private entry points,
* and fail to include <resolv.h>.
*/
#undef fp_resstat
__weak_reference(__fp_resstat, fp_resstat);
#undef p_fqnname
__weak_reference(__p_fqnname, p_fqnname);
#undef sym_ston
__weak_reference(__sym_ston, sym_ston);
#undef sym_ntos
__weak_reference(__sym_ntos, sym_ntos);
#undef sym_ntop
__weak_reference(__sym_ntop, sym_ntop);
#undef dn_count_labels
__weak_reference(__dn_count_labels, dn_count_labels);
#undef p_secstodate
__weak_reference(__p_secstodate, p_secstodate);
/*! \file */
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