/*
 *
 *	@doc RESOLVE
 *
 *    
 * @module res_debu.c |
 *	
 *	  Contains implimentations for debugging information,
 *	  including result codes and specified where the debugging log
 *	  is to be written.
 *
 *	  WSHelper DNS/Hesiod Library for WINSOCK
*/

/*-
 * Copyright (c) 1985, 1990 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.
 *
 *      @(#)res_debug.c 5.36 (Berkeley) 3/6/91
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_debug.c 5.36 (Berkeley) 3/6/91";
#endif /* LIBC_SCCS and not lint */

#include <windows.h>
#include <winsock.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <stdio.h>
#include <string.h>

#include "u-compat.h"

static void __fp_query();
static char *__p_class();
static char *__p_time();
static char *__p_type();
static char *p_cdname();
static char *p_rr();

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",
};

void
__p_query(char *msg)
{
#ifndef _WINDLL
    __fp_query(msg,stdout);
#else /* if 1 */ /* !defined(WIN32) */
    FILE *stdout_out; /* il 8/17/95 -- NT does not like stdout */

    if ((stdout_out = fopen("c:\\resdebug.log", "a")) != NULL)
    {
        __fp_query(msg,stdout_out);
        fclose(stdout_out);
    }
#endif
}


/*
 * Print the contents of a query.
 * This is intended to be primarily a debugging routine.
 */
static
void
__fp_query(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;
        }
    }
}

static char *
p_cdname(cp, msg, file)
    char *cp, *msg;
    FILE *file;
{
    char name[MAXDNAME];
    int n;

    if ((n = rdn_expand((u_char *)msg, (u_char *)msg + 512, (u_char *)cp,
        (u_char *)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.
 */
static 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:
#ifndef _WINDLL         
            bcopy(cp, (char *)&inaddr, sizeof(inaddr));
#else
            memcpy((char *)&inaddr, cp, sizeof(inaddr));
#endif
            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;
#ifndef _WINDLL
        bcopy(cp, (char *)&inaddr, sizeof(inaddr));
#else
        memcpy((char *)&inaddr, cp, sizeof(inaddr));
#endif
        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
 */
static 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:
#ifndef _WINDLL
        (void)sprintf(nbuf, "%d", type);
#else
        (void)wsprintf(nbuf, "%d", type);
#endif
        return(nbuf);
    }
}

/*
 * Return a mnemonic for class
 */
static 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:
#ifndef _WINDLL
        (void)sprintf(nbuf, "%d", class);
#else
        (void)wsprintf(nbuf, "%d", class);
#endif
        return(nbuf);
    }
}

/*
 * Return a mnemonic for a time to live
 */
static char *
__p_time(value)
    u_long value;
{
    int secs, mins, hours;
    register char *p;

    if (value == 0) {
        strcpy(nbuf, "0 secs");
        return(nbuf);
    }

    secs = (int) value % 60;
    value /= 60;
    mins = (int) value % 60;
    value /= 60;
    hours = (int) value % 24;
    value /= 24;

#define PLURALIZE(x)    x, (x == 1) ? "" : "s"
    p = nbuf;
    if (value) {
#ifndef _WINDLL
        (void)sprintf(p, "%d day%s", PLURALIZE(value));
#else
        (void)wsprintf(p, "%d day%s", PLURALIZE(value));
#endif
        while (*++p);
    }
    if (hours) {
        if (value)
            *p++ = ' ';
#ifndef _WINDLL
        (void)sprintf(p, "%d hour%s", PLURALIZE(hours));
#else
        (void)wsprintf(p, "%d hour%s", PLURALIZE(hours));
#endif
        while (*++p);
    }
    if (mins) {
        if (value || hours)
            *p++ = ' ';
#ifndef _WINDLL
        (void)sprintf(p, "%d min%s", PLURALIZE(mins));
#else
        (void)wsprintf(p, "%d min%s", PLURALIZE(mins));
#endif

        while (*++p);
    }
    if (secs || ! (value || hours || mins)) {
        if (value || hours || mins)
            *p++ = ' ';
#ifndef _WINDLL
        (void)sprintf(p, "%d sec%s", PLURALIZE(secs));
#else
        (void)wsprintf(p, "%d sec%s", PLURALIZE(secs));
#endif
    }
    return(nbuf);
}
