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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.

 * 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.

 */

/*

 * 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.

 */

/*

 * Portions Copyright (c) 1996 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS

 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE

 * CONSORTIUM 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 char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";

static char rcsid[] = "$Id: res_debug.c,v 1.2 2001-09-27 12:01:53 chris Exp $";

#endif /* LIBC_SCCS and not lint */

#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 <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

#define SPRINTF(x) sprintf x

extern const char *_res_opcodes[];

extern const char *_res_resultcodes[];

extern const char *_res_sectioncodes[];

/*

 * Print the current options.

 */

void

fp_resstat(struct __res_state *statp, FILE *file) {

        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);

}

static void

do_section(ns_msg *handle, ns_sect section, int pflag, FILE *file) {

        int n, sflag, rrnum;

        char buf[2048]; /* XXX need to malloc */

        ns_opcode opcode;

        ns_rr rr;

        /*

         * Print answer records.

         */

        sflag = (_res.pfcode & pflag);

        if (_res.pfcode && !sflag)

                return;

        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 &&

                                 (_res.pfcode & RES_PRF_HEAD1))

                                putc('\n', file);

                        return;

                }

                if (rrnum == 0 && sflag != 0 && (_res.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 {

                        n = ns_sprintrr(handle, &rr, NULL, NULL,

                                        buf, sizeof buf);

                        if (n < 0) {

                                fprintf(file, ";; ns_sprintrr: %s\n",

                                        strerror(errno));

                                return;

                        }

                        fputs(buf, file);

                        fputc('\n', file);

                }

                rrnum++;

        }

}

void

p_query(const u_char *msg) {

        fp_query(msg, stdout);

}

void

fp_query(const u_char *msg, FILE *file) {

        fp_nquery(msg, PACKETSZ, file);

}

/*

 * Print the contents of a query.

 * This is intended to be primarily a debugging routine.

 */

void

fp_nquery(const u_char *msg, int len, FILE *file) {

        ns_msg handle;

        int qdcount, ancount, nscount, arcount;

        u_int opcode, rcode, id;

        if ((_res.options & RES_INIT) == 0 && res_init() == -1)

                return;

        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 ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX) || rcode)

                fprintf(file,

                        ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",

                        _res_opcodes[opcode], _res_resultcodes[rcode], id);

        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX))

                putc(';', file);

        if ((!_res.pfcode) || (_res.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 ((!_res.pfcode) || (_res.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 ((!_res.pfcode) || (_res.pfcode &

                (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {

                putc('\n',file);

        }

        /*

         * Print the various sections.

         */

        do_section(&handle, ns_s_qd, RES_PRF_QUES, file);

        do_section(&handle, ns_s_an, RES_PRF_ANS, file);

        do_section(&handle, ns_s_ns, RES_PRF_AUTH, file);

        do_section(&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"},

        {C_CHAOS,       "CHAOS"},

        {C_HS,          "HS"},

        {C_HS,          "HESIOD"},

        {C_ANY,         "ANY"},

        {C_NONE,        "NONE"},

        {C_IN,          (char *)0}

};

/*

 * Names of message sections.

 */

const struct res_sym __p_default_section_syms[] = {

        {ns_s_qd,       "QUERY"},

        {ns_s_an,       "ANSWER"},

        {ns_s_ns,       "AUTHORITY"},

        {ns_s_ar,       "ADDITIONAL"},

        {0,             (char *)0}

};

const struct res_sym __p_update_section_syms[] = {

        {S_ZONE,        "ZONE"},

        {S_PREREQ,      "PREREQUISITE"},

        {S_UPDATE,      "UPDATE"},

        {S_ADDT,        "ADDITIONAL"},

        {0,             (char *)0}

};

/*

 * 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[] = {

        {T_A,           "A",            "address"},

        {T_NS,          "NS",           "name server"},

        {T_MD,          "MD",           "mail destination (deprecated)"},

        {T_MF,          "MF",           "mail forwarder (deprecated)"},

        {T_CNAME,       "CNAME",        "canonical name"},

        {T_SOA,         "SOA",          "start of authority"},

        {T_MB,          "MB",           "mailbox"},

        {T_MG,          "MG",           "mail group member"},

        {T_MR,          "MR",           "mail rename"},

        {T_NULL,        "NULL",         "null"},

        {T_WKS,         "WKS",          "well-known service (deprecated)"},

        {T_PTR,         "PTR",          "domain name pointer"},

        {T_HINFO,       "HINFO",        "host information"},

        {T_MINFO,       "MINFO",        "mailbox information"},

        {T_MX,          "MX",           "mail exchanger"},

        {T_TXT,         "TXT",          "text"},

        {T_RP,          "RP",           "responsible person"},

        {T_AFSDB,       "AFSDB",        "DCE or AFS server"},

        {T_X25,         "X25",          "X25 address"},

        {T_ISDN,        "ISDN",         "ISDN address"},

        {T_RT,          "RT",           "router"},

        {T_NSAP,        "NSAP",         "nsap address"},

        {T_NSAP_PTR,    "NSAP_PTR",     "domain name pointer"},

        {T_SIG,         "SIG",          "signature"},

        {T_KEY,         "KEY",          "key"},

        {T_PX,          "PX",           "mapping information"},

        {T_GPOS,        "GPOS",         "geographical position (withdrawn)"},

        {T_AAAA,        "AAAA",         "IPv6 address"},

        {T_LOC,         "LOC",          "location"},

        {T_NXT,         "NXT",          "next valid name (unimplemented)"},

        {T_EID,         "EID",          "endpoint identifier (unimplemented)"},

        {T_NIMLOC,      "NIMLOC",       "NIMROD locator (unimplemented)"},

        {T_SRV,         "SRV",          "server selection"},

        {T_ATMA,        "ATMA",         "ATM address (unimplemented)"},

        {T_IXFR,        "IXFR",         "incremental zone transfer"},

        {T_AXFR,        "AXFR",         "zone transfer"},

        {T_MAILB,       "MAILB",        "mailbox-related data (deprecated)"},

        {T_MAILA,       "MAILA",        "mail agent (deprecated)"},

        {T_NAPTR,       "NAPTR",        "URN Naming Authority"},

        {T_ANY,         "ANY",          "\"any\""},

        {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) {

        static char unname[20];

        for ((void)NULL; syms->name != 0; syms++) {

                if (number == syms->number) {

                        if (success)

                                *success = 1;

                        return (syms->name);

                }

        }

        sprintf(unname, "%d", number);

        if (success)

                *success = 0;

        return (unname);

}

const char *

sym_ntop(const struct res_sym *syms, int number, int *success) {

        static char unname[20];

        for ((void)NULL; syms->name != 0; syms++) {

                if (number == syms->number) {

                        if (success)

                                *success = 1;

                        return (syms->humanname);

                }

        }

        sprintf(unname, "%d", number);

        if (success)

                *success = 0;

        return (unname);

}

/*

 * Return a string for the type.

 */

const char *

p_type(int type) {

        return (sym_ntos(__p_type_syms, type, (int *)0));

}

/*

 * 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) {

        return (sym_ntos(__p_class_syms, class, (int *)0));

}

/*

 * Return a mnemonic for an option

 */

const char *

p_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.

 */

const char *

p_time(u_int32_t value) {

        static char nbuf[40];

        if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)

                sprintf(nbuf, "%u", value);

        return (nbuf);

}

/*

 * 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;

{

        static char retbuf[sizeof "90000000.00"];

        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, "%ld.%.2ld", val/100, val%100);

        return (retbuf);

}

/* converts ascii size/precision X * 10**Y(cm) to 0xXY.  moves pointer. */

static u_int8_t

precsize_aton(strptr)

        char **strptr;

{

        unsigned int mval = 0, cmval = 0;

        u_int8_t retval = 0;

        char *cp;

        int exponent;

        int mantissa;

        cp = *strptr;

        while (isdigit((int)*cp))

                mval = mval * 10 + (*cp++ - '0');

        if (*cp == '.') {               /* centimeters */

                cp++;

                if (isdigit((int)*cp)) {

                        cmval = (*cp++ - '0') * 10;

                        if (isdigit((int)*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(latlonstrptr,which)

        char **latlonstrptr;

        int *which;

{

        char *cp;

        u_int32_t retval;

        int deg = 0, min = 0, secs = 0, secsfrac = 0;

        cp = *latlonstrptr;

        while (isdigit((int)*cp))

                deg = deg * 10 + (*cp++ - '0');

        while (isspace((int)*cp))

                cp++;

        if (!(isdigit((int)*cp)))

                goto fndhemi;

        while (isdigit((int)*cp))

                min = min * 10 + (*cp++ - '0');