tests/names/t_names.c

	t_names.c revision 70e5a7403f0e0a3bd292b8287c5fed5772c15270
/*
 * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2003  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or 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.
 */

/* $Id: t_names.c,v 1.43 2007/06/19 23:47:00 tbox Exp $ */

#include <config.h>

#include <ctype.h>
#include <stdlib.h>

#include <isc/buffer.h>
#include <isc/mem.h>
#include <isc/string.h>

#include <dns/compress.h>
#include <dns/name.h>
#include <dns/result.h>

#include <tests/t_api.h>

#define MAXTOKS     16
#define BUFLEN      256
#define BIGBUFLEN   4096

static char *Tokens[MAXTOKS + 1];


#ifdef  NEED_PBUF

/*%
 * get a hex formatted dns message from a data
 * file into an isc_buffer_t
 * caller supplies data storage and the isc_buffer
 * we read the file, convert, setup the buffer
 * and return the data length
 */

static char *
ctoh(unsigned char c) {
    int     val;
    static char buf[3];

    val = (c >> 4) & 0x0f;
    if ((0 <= val) && (val <= 9))
        buf[0] = '0' + val;
    else if ((10 <= val) && (val <= 16))
        buf[0] = 'a' + val - 10;
    val = c & 0x0f;
    if ((0 <= val) && (val <= 9))
        buf[1] = '0' + val;
    else if ((10 <= val) && (val <= 16))
        buf[1] = 'a' + val - 10;
    buf[2] = '\0';
    return (buf);
}

static void
pbuf(isc_buffer_t *pbuf) {
    size_t      len;
    unsigned char   *p;

    len = 0;
    p = pbuf->base;
    while (len < pbuf->length) {
        printf("%s", ctoh(*p));
        ++p;
        ++len;
        if ((len % 40) == 0)
            printf("\n");
    }
}

#endif  /* NEED_PBUF */

/*%
 * Compare data at buf with data in hex representation at exp_data,
 * of length exp_data_len, for equality.
 * Return 0 if equal, else non-zero.
 */

static int
chkdata(unsigned char *buf, size_t buflen, char *exp_data,
    size_t exp_data_len)
{
    int     result;
    unsigned char   *p;
    unsigned char   *v;
    char        *q;
    unsigned char   *data;
    size_t      cnt;

    if (buflen == exp_data_len) {
        data = (unsigned char *)malloc(exp_data_len *
                           sizeof(unsigned char));
        if (data == NULL) {
            t_info("malloc failed unexpectedly\n");
            return (-1);
        }

        /*
         * First convert exp_data from hex format.
         */
        p = data;
        q = exp_data;
        cnt = 0;
        while (cnt < exp_data_len) {

            if (('0' <= *q) && (*q <= '9'))
                *p = *q - '0';
            else if (('a' <= *q) && (*q <= 'z'))
                *p = *q - 'a' + 10;
            else if (('A' <= *q) && (*q <= 'Z'))
                *p = *q - 'A' + 10;
            ++q;

            *p <<= 4;

            if (('0' <= *q) && (*q <= '9'))
                *p |= ((*q - '0') & 0x0f);
            else if (('a' <= *q) && (*q <= 'z'))
                *p |= ((*q - 'a' + 10) & 0x0f);
            else if (('A' <= *q) && (*q <= 'Z'))
                *p |= ((*q - 'A' + 10) & 0x0f);
            ++p;
            ++q;
            ++cnt;
        }

        /*
         * Now compare data.
         */
        p = buf;
        v = data;
        for (cnt = 0; cnt < exp_data_len; ++cnt) {
            if (*p != *v)
                break;
            ++p;
            ++v;
        }
        if (cnt == exp_data_len)
            result = 0;
        else {
            t_info("bad data at position %lu, "
                   "got 0x%.2x, expected 0x%.2x\n",
                   (unsigned long)cnt, *p, *q);
            result = cnt + 1;
        }
        (void)free(data);
    } else {
        t_info("data length error, expected %lu, got %lu\n",
            (unsigned long)exp_data_len, (unsigned long)buflen);
        result = exp_data_len - buflen;
    }
    return (result);
}

/*%
 * Get a hex formatted dns message from a data file into an isc_buffer_t.
 * Caller supplies data storage and the isc_buffer.  We read the file, convert,
 * setup the buffer and return the data length.
 */
static int
getmsg(char *datafile_name, unsigned char *buf, int buflen, isc_buffer_t *pbuf)
{
    int         c;
    int         len;
    int         cnt;
    unsigned int        val;
    unsigned char       *p;
    FILE            *fp;

    fp = fopen(datafile_name, "r");
    if (fp == NULL) {
        t_info("No such file %s\n", datafile_name);
        return (0);
    }

    p = buf;
    cnt = 0;
    len = 0;
    val = 0;
    while ((c = getc(fp)) != EOF) {
        if (    (c == ' ') || (c == '\t') ||
            (c == '\r') || (c == '\n'))
                continue;
        if (c == '#') {
            while ((c = getc(fp)) != '\n')
                ;
            continue;
        }
        if (('0' <= c) && (c <= '9'))
            val = c - '0';
        else if (('a' <= c) && (c <= 'z'))
            val = c - 'a' + 10;
        else if (('A' <= c) && (c <= 'Z'))
            val = c - 'A'+ 10;
        else {
            t_info("Bad format in datafile\n");
            return (0);
        }
        if ((len % 2) == 0) {
            *p = (val << 4);
        } else {
            *p += val;
            ++p;
            ++cnt;
            if (cnt >= buflen) {
                /*
                 * Buffer too small.
                 */
                t_info("Buffer overflow error\n");
                return (0);
            }
        }
        ++len;
    }
    (void)fclose(fp);

    if (len % 2) {
        t_info("Bad format in %s\n", datafile_name);
        return (0);
    }

    *p = '\0';
    isc_buffer_init(pbuf, buf, cnt);
    isc_buffer_add(pbuf, cnt);
    return (cnt);
}

static int
bustline(char *line, char **toks) {
    int cnt;
    char    *p;

    cnt = 0;
    if (line && *line) {
        while ((p = strtok(line, "\t")) && (cnt < MAXTOKS)) {
            *toks++ = p;
            line = NULL;
            ++cnt;
        }
    }
    return (cnt);
}


#ifdef  NEED_HNAME_TO_TNAME

/*%
 * convert a name from hex representation to text form
 * format of hex notation is:
 * %xXXXXXXXX
 */

static int
hname_to_tname(char *src, char *target, size_t len) {
    int     i;
    int     c;
    unsigned int    val;
    size_t      srclen;
    char        *p;
    char        *q;

    p = src;
    srclen = strlen(p);
    if ((srclen >= 2) && ((*p != '%') || (*(p+1) != 'x'))) {
        /*
         * No conversion needed.
         */
        if (srclen >= len)
            return (1);
        memcpy(target, src, srclen + 1);
        return (0);
    }

    i = 0;
    p += 2;
    q = target;
    while (*p) {
        c = *p;
        if (('0' < c) && (c <= '9'))
            val = c - '0';
        else if (('a' <= c) && (c <= 'z'))
            val = c + 10 - 'a';
        else if (('A' <= c) && (c <= 'Z'))
            val = c + 10 - 'A';
        else {
            return (1);
        }
        if (i % 2) {
            *q |= val;
            ++q;
        } else
            *q = (val << 4);
        ++i;
        ++p;
    }
    if (i % 2) {
        return (1);
    } else {
        *q = '\0';
        return (0);
    }
}

#endif  /* NEED_HNAME_TO_TNAME */

/*%
 * initialize a dns_name_t from a text name, hiding all
 * buffer and other object initialization from the caller
 *
 */

static isc_result_t
dname_from_tname(char *name, dns_name_t *dns_name) {
    int     len;
    isc_buffer_t    txtbuf;
    isc_buffer_t    *binbuf;
    unsigned char   *junk;
    isc_result_t    result;

    len = strlen(name);
    isc_buffer_init(&txtbuf, name, len);
    isc_buffer_add(&txtbuf, len);
    junk = (unsigned char *)malloc(sizeof(unsigned char) * BUFLEN);
    binbuf = (isc_buffer_t *)malloc(sizeof(isc_buffer_t));
    if ((junk != NULL) && (binbuf != NULL)) {
        isc_buffer_init(binbuf, junk, BUFLEN);
        dns_name_init(dns_name, NULL);
        dns_name_setbuffer(dns_name, binbuf);
        result = dns_name_fromtext(dns_name,  &txtbuf,
                        NULL, ISC_FALSE, NULL);
    } else {
        result = ISC_R_NOSPACE;
        if (junk != NULL)
            (void)free(junk);
        if (binbuf != NULL)
            (void)free(binbuf);
    }
    return (result);
}

static const char *a3 = "dns_name_init initializes 'name' to the empty name";

static void
t_dns_name_init(void) {
    int     rval;
    int     result;
    dns_name_t  name;
    unsigned char   offsets[1];

    rval = 0;
    t_assert("dns_name_init", 1, T_REQUIRED, a3);

    dns_name_init(&name, offsets);
    /* magic is hidden in name.c ...
    if (name.magic != NAME_MAGIC) {
        t_info("name.magic is not set to NAME_MAGIC\n");
        ++rval;
    }
    */
    if (name.ndata != NULL) {
        t_info("name.ndata is not NULL\n");
        ++rval;
    }
    if (name.length != 0) {
        t_info("name.length is not 0\n");
        ++rval;
    }
    if (name.labels != 0) {
        t_info("name.labels is not 0\n");
        ++rval;
    }
    if (name.attributes != 0) {
        t_info("name.attributes is not 0\n");
        ++rval;
    }
    if (name.offsets != offsets) {
        t_info("name.offsets is incorrect\n");
        ++rval;
    }
    if (name.buffer != NULL) {
        t_info("name.buffer is not NULL\n");
        ++rval;
    }

    if (rval == 0)
        result = T_PASS;
    else
        result = T_FAIL;
    t_result(result);
}

static const char *a4 = "dns_name_invalidate invalidates 'name'";

static void
t_dns_name_invalidate(void) {
    int     rval;
    int     result;
    dns_name_t  name;
    unsigned char   offsets[1];

    t_assert("dns_name_invalidate", 1, T_REQUIRED, a4);

    rval = 0;
    dns_name_init(&name, offsets);
    dns_name_invalidate(&name);

    /* magic is hidden in name.c ...
    if (name.magic != 0) {
        t_info("name.magic is not set to NAME_MAGIC\n");
        ++rval;
    }
    */
    if (name.ndata != NULL) {
        t_info("name.ndata is not NULL\n");
        ++rval;
    }
    if (name.length != 0) {
        t_info("name.length is not 0\n");
        ++rval;
    }
    if (name.labels != 0) {
        t_info("name.labels is not 0\n");
        ++rval;
    }
    if (name.attributes != 0) {
        t_info("name.attributes is not 0\n");
        ++rval;
    }
    if (name.offsets != NULL) {
        t_info("name.offsets is not NULL\n");
        ++rval;
    }
    if (name.buffer != NULL) {
        t_info("name.buffer is not NULL\n");
        ++rval;
    }

    if (rval == 0)
        result = T_PASS;
    else
        result = T_FAIL;
    t_result(result);
}

static const char *a5 = "dns_name_setbuffer dedicates a buffer for use "
            "with 'name'";

static void
t_dns_name_setbuffer(void) {
    int     result;
    unsigned char   junk[BUFLEN];
    dns_name_t  name;
    isc_buffer_t    buffer;

    t_assert("dns_name_setbuffer", 1, T_REQUIRED, a5);

    isc_buffer_init(&buffer, junk, BUFLEN);
    dns_name_init(&name, NULL);
    dns_name_setbuffer(&name, &buffer);
    if (name.buffer == &buffer)
        result = T_PASS;
    else
        result = T_FAIL;

    t_result(result);
}

static const char *a6 = "dns_name_hasbuffer returns ISC_TRUE if 'name' has a "
            "dedicated buffer, otherwise it returns ISC_FALSE";

static void
t_dns_name_hasbuffer(void) {
    int     result;
    int     rval;
    unsigned char   junk[BUFLEN];
    dns_name_t  name;
    isc_buffer_t    buffer;

    t_assert("dns_name_hasbuffer", 1, T_REQUIRED, a6);

    rval = 0;
    isc_buffer_init(&buffer, junk, BUFLEN);
    dns_name_init(&name, NULL);
    if (dns_name_hasbuffer(&name) != ISC_FALSE)
        ++rval;
    dns_name_setbuffer(&name, &buffer);
    if (dns_name_hasbuffer(&name) != ISC_TRUE)
        ++rval;
    if (rval == 0)
        result = T_PASS;
    else
        result = T_FAIL;

    t_result(result);
}

static const char *a7 = "dns_name_isabsolute returns ISC_TRUE if 'name' ends "
            "in the root label";

static int
test_dns_name_isabsolute(char *test_name, isc_boolean_t expected) {
    dns_name_t  name;
    isc_buffer_t    buf;
    isc_buffer_t    binbuf;
    unsigned char   junk[BUFLEN];
    int     len;
    int     rval;
    isc_boolean_t   isabs_p;
    isc_result_t    result;

    rval = T_UNRESOLVED;

    t_info("testing name %s\n", test_name);
    len = strlen(test_name);
    isc_buffer_init(&buf, test_name, len);
    isc_buffer_add(&buf, len);
    isc_buffer_init(&binbuf, &junk[0], BUFLEN);
    dns_name_init(&name, NULL);
    dns_name_setbuffer(&name, &binbuf);
    result = dns_name_fromtext(&name,  &buf, NULL, ISC_FALSE, NULL);
    if (result == ISC_R_SUCCESS) {
        isabs_p = dns_name_isabsolute(&name);
        if (isabs_p == expected)
            rval = T_PASS;
        else
            rval = T_FAIL;
    } else {
        t_info("dns_name_fromtext %s failed, result = %s\n",
                test_name, dns_result_totext(result));
    }
    return (rval);
}

static void
t_dns_name_isabsolute(void) {
    int line;
    int cnt;
    int result;
    char    *p;
    FILE    *fp;

    t_assert("dns_name_isabsolute", 1, T_REQUIRED, a7);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_isabsolute_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 2) {
                /*
                 * label, bitpos, expected value.
                 */
                result = test_dns_name_isabsolute(Tokens[0],
                                    atoi(Tokens[1])
                                  == 0 ?
                                  ISC_FALSE :
                                  ISC_TRUE);
            } else {
                t_info("bad datafile format at line %d\n",
                       line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_isabsolute_data\n");
        t_result(result);
    }
}

static const char *a8 = "dns_name_hash(name, case_sensitive) returns "
        "a hash of 'name' which is case_sensitive if case_sensitive "
        "is true";

/*%
 * a9 merged with a8.
 */

static int
test_dns_name_hash(char *test_name1, char *test_name2,
        isc_boolean_t csh_match, isc_boolean_t cish_match) {
    int     rval;
    int     failures;
    isc_boolean_t   match;
    unsigned int    hash1;
    unsigned int    hash2;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    isc_result_t    result;

    rval = T_UNRESOLVED;
    failures = 0;

    t_info("testing names %s and %s\n", test_name1, test_name2);

    result = dname_from_tname(test_name1, &dns_name1);
    if (result == ISC_R_SUCCESS) {
        result = dname_from_tname(test_name2, &dns_name2);
        if (result == ISC_R_SUCCESS) {
            hash1 = dns_name_hash(&dns_name1, ISC_TRUE);
            hash2 = dns_name_hash(&dns_name2, ISC_TRUE);
            match = ISC_FALSE;
            if (hash1 == hash2)
                match = ISC_TRUE;
            if (match != csh_match) {
                ++failures;
                t_info("hash mismatch when ISC_TRUE\n");
            }
            hash1 = dns_name_hash(&dns_name1, ISC_FALSE);
            hash2 = dns_name_hash(&dns_name2, ISC_FALSE);
            match = ISC_FALSE;
            if (hash1 == hash2)
                match = ISC_TRUE;
            if (match != cish_match) {
                ++failures;
                t_info("hash mismatch when ISC_FALSE\n");
            }
            if (failures == 0)
                rval = T_PASS;
            else
                rval = T_FAIL;
        } else {
            t_info("dns_fromtext %s failed, result = %s\n",
                test_name2, dns_result_totext(result));
        }
    } else {
        t_info("dns_fromtext %s failed, result = %s\n",
                test_name1, dns_result_totext(result));
    }
    return (rval);
}

static void
t_dns_name_hash(void) {
    int line;
    int cnt;
    int result;
    char    *p;
    FILE    *fp;

    t_assert("dns_name_hash", 1, T_REQUIRED, a8);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_hash_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 4) {
                /*
                 * name1, name2, exp match value if
                 * case_sensitive true,
                 * exp match value of case_sensitive false
                 */
                result = test_dns_name_hash(
                        Tokens[0],
                        Tokens[1],
                        atoi(Tokens[2]) == 0 ?
                            ISC_FALSE : ISC_TRUE,
                        atoi(Tokens[3]) == 0 ?
                            ISC_FALSE : ISC_TRUE);
            } else {
                t_info("bad datafile format at line %d\n",
                        line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_hash_data\n");
        t_result(result);
    }
}

static const char *a10 =
        "dns_name_fullcompare(name1, name2, orderp, nlabelsp) "
        "returns the DNSSEC ordering relationship between name1 and "
        "name2, sets orderp to -1 if name1 < name2, to 0 if "
        "name1 == name2, or to 1 if name1 > name2, sets nlabelsp "
        "to the number of labels name1 and name2 have in common, "
        "and sets nbitsp to the number of bits name1 and name2 "
        "have in common";

/*%
 * a11 thru a22 merged into a10.
 */
static const char *
dns_namereln_to_text(dns_namereln_t reln) {
    const char *p;

    if (reln == dns_namereln_contains)
        p = "contains";
    else if (reln == dns_namereln_subdomain)
        p = "subdomain";
    else if (reln == dns_namereln_equal)
        p = "equal";
    else if (reln == dns_namereln_none)
        p = "none";
    else if (reln == dns_namereln_commonancestor)
        p = "commonancestor";
    else
        p = "unknown";

    return (p);
}

static int
test_dns_name_fullcompare(char *name1, char *name2,
              dns_namereln_t exp_dns_reln,
              int exp_order, int exp_nlabels)
{
    int     result;
    int     nfails;
    int     order;
    unsigned int    nlabels;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    isc_result_t    dns_result;
    dns_namereln_t  dns_reln;

    nfails = 0;
    result = T_UNRESOLVED;


    t_info("testing names %s and %s for relation %s\n", name1, name2,
           dns_namereln_to_text(exp_dns_reln));

    dns_result = dname_from_tname(name1, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {
        dns_result = dname_from_tname(name2, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            dns_reln = dns_name_fullcompare(&dns_name1, &dns_name2,
                    &order, &nlabels);

            if (dns_reln != exp_dns_reln) {
                ++nfails;
                t_info("expected relationship of %s, got %s\n",
                    dns_namereln_to_text(exp_dns_reln),
                    dns_namereln_to_text(dns_reln));
            }
            /*
             * Normalize order.
             */
            if (order < 0)
                order = -1;
            else if (order > 0)
                order = 1;
            if (order != exp_order) {
                ++nfails;
                t_info("expected ordering %d, got %d\n",
                        exp_order, order);
            }
            if ((exp_nlabels >= 0) &&
                (nlabels != (unsigned int)exp_nlabels)) {
                ++nfails;
                t_info("expecting %d labels, got %d\n",
                       exp_nlabels, nlabels);
            }
            if (nfails == 0)
                result = T_PASS;
            else
                result = T_FAIL;
        } else {
            t_info("dname_from_tname failed, result == %s\n",
                   dns_result_totext(result));
        }
    } else {
        t_info("dname_from_tname failed, result == %s\n",
               dns_result_totext(result));
    }

    return (result);
}

static void
t_dns_name_fullcompare(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;
    dns_namereln_t  reln;

    t_assert("dns_name_fullcompare", 1, T_REQUIRED, a10);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_fullcompare_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 6) {
                /*
                 * name1, name2, exp_reln, exp_order,
                 * exp_nlabels
                 */
                if (!strcmp(Tokens[2], "none"))
                    reln = dns_namereln_none;
                else if (!strcmp(Tokens[2], "contains"))
                    reln = dns_namereln_contains;
                else if (!strcmp(Tokens[2], "subdomain"))
                    reln = dns_namereln_subdomain;
                else if (!strcmp(Tokens[2], "equal"))
                    reln = dns_namereln_equal;
                else if (!strcmp(Tokens[2], "commonancestor"))
                    reln = dns_namereln_commonancestor;
                else {
                    t_info("bad format at line %d\n",
                           line);
                    continue;
                }
                result = test_dns_name_fullcompare(
                        Tokens[0],
                        Tokens[1],
                        reln,
                        atoi(Tokens[3]),
                        atoi(Tokens[4]));
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_fullcompare_data\n");
        t_result(result);
    }
}

static const char *a23 =
        "dns_name_compare(name1, name2) returns information about "
        "the relative ordering under the DNSSEC ordering relationship "
        "of name1 and name2";

/*%
 * a24 thru a29 merged into a23.
 */

static int
test_dns_name_compare(char *name1, char *name2, int exp_order) {
    int     result;
    int     order;
    isc_result_t    dns_result;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;

    result = T_UNRESOLVED;

    t_info("testing %s %s %s\n", name1,
           exp_order == 0 ? "==": (exp_order == -1 ? "<" : ">"),
           name2);

    dns_result = dname_from_tname(name1, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {
        dns_result = dname_from_tname(name2, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            order = dns_name_compare(&dns_name1, &dns_name2);
            /*
             * Normalize order.
             */
            if (order < 0)
                order = -1;
            else if (order > 0)
                order = 1;
            if (order != exp_order) {
                t_info("expected order of %d, got %d\n",
                       exp_order, order);
                result = T_FAIL;
            } else
                result = T_PASS;
        } else {
            t_info("dname_from_tname failed, result == %s\n",
                    dns_result_totext(result));
        }
    } else {
        t_info("dname_from_tname failed, result == %s\n",
                dns_result_totext(result));
    }

    return (result);
}

static void
t_dns_name_compare(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_compare", 1, T_REQUIRED, a23);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_compare_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 3) {
                /*
                 * name1, name2, order.
                 */
                result = test_dns_name_compare(
                        Tokens[0],
                        Tokens[1],
                        atoi(Tokens[2]));
            } else {
                t_info("bad datafile format at line %d\n",
                       line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_compare_data\n");
        t_result(result);
    }
}

static const char *a30 =
        "dns_name_rdatacompare(name1, name2) returns information "
        "about the relative ordering of name1 and name2 as if they "
        "are part of rdata in DNSSEC canonical form";

/*%
 * a31, a32 merged into a30.
 */

static int
test_dns_name_rdatacompare(char *name1, char *name2, int exp_order) {
    int     result;
    int     order;
    isc_result_t    dns_result;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;

    result = T_UNRESOLVED;

    t_info("testing %s %s %s\n", name1,
           exp_order == 0 ? "==": (exp_order == -1 ? "<" : ">"), name2);

    dns_result = dname_from_tname(name1, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {
        dns_result = dname_from_tname(name2, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            order = dns_name_rdatacompare(&dns_name1, &dns_name2);
            /*
             * Normalize order.
             */
            if (order < 0)
                order = -1;
            else if (order > 0)
                order = 1;
            if (order != exp_order) {
                t_info("expected order of %d, got %d\n",
                       exp_order, order);
                result = T_FAIL;
            } else
                result = T_PASS;
        } else {
            t_info("dname_from_tname failed, result == %s\n",
                   dns_result_totext(result));
        }
    } else {
        t_info("dname_from_tname failed, result == %s\n",
               dns_result_totext(result));
    }

    return (result);
}

static void
t_dns_name_rdatacompare(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_rdatacompare", 1, T_REQUIRED, a30);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_rdatacompare_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 3) {
                /*
                 * name1, name2, order.
                 */
                result = test_dns_name_rdatacompare(
                        Tokens[0],
                        Tokens[1],
                        atoi(Tokens[2]));
            } else {
                t_info("bad datafile format at line %d\n",
                       line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_rdatacompare_data\n");
        t_result(result);
    }
}


static const char *a33 =
        "when name1 is a subdomain of name2, "
        "dns_name_issubdomain(name1, name2) returns true, "
        "otherwise it returns false.";

/*%
 * a34 merged into a33.
 */

static int
test_dns_name_issubdomain(char *name1, char *name2, isc_boolean_t exp_rval) {
    int     result;
    isc_boolean_t   rval;
    isc_result_t    dns_result;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;

    result = T_UNRESOLVED;

    t_info("testing %s %s a subdomain of %s\n", name1,
           exp_rval == 0 ? "is not" : "is", name2);

    dns_result = dname_from_tname(name1, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {
        dns_result = dname_from_tname(name2, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            rval = dns_name_issubdomain(&dns_name1, &dns_name2);

            if (rval != exp_rval) {
                t_info("expected return value of %s, got %s\n",
                       exp_rval == ISC_TRUE ? "true" : "false",
                       rval == ISC_TRUE ? "true" : "false");
                result = T_FAIL;
            } else
                result = T_PASS;
        } else {
            t_info("dname_from_tname failed, result == %s\n",
                   dns_result_totext(result));
        }
    } else {
        t_info("dname_from_tname failed, result == %s\n",
               dns_result_totext(result));
    }

    return (result);
}

static void
t_dns_name_issubdomain(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_issubdomain", 1, T_REQUIRED, a33);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_issubdomain_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 3) {
                /*
                 * name1, name2, issubdomain_p.
                 */
                result = test_dns_name_issubdomain(
                        Tokens[0],
                        Tokens[1],
                        atoi(Tokens[2]) == 0 ?
                        ISC_FALSE : ISC_TRUE);
            } else {
                t_info("bad datafile format at line %d\n",
                       line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_issubdomain_data\n");
        t_result(result);
    }
}

static const char *a35 =
        "dns_name_countlabels(name) returns the number "
        "of labels in name";

static int
test_dns_name_countlabels(char *test_name, unsigned int exp_nlabels) {
    int     result;
    unsigned int    nlabels;
    isc_result_t    dns_result;
    dns_name_t  dns_name;

    result = T_UNRESOLVED;

    t_info("testing %s\n", test_name);

    dns_result = dname_from_tname(test_name, &dns_name);
    if (dns_result == ISC_R_SUCCESS) {
        nlabels = dns_name_countlabels(&dns_name);

        if (nlabels != exp_nlabels) {
            t_info("expected %d, got %d\n", exp_nlabels, nlabels);
            result = T_FAIL;
        } else
            result = T_PASS;
    } else {
        t_info("dname_from_tname failed, result == %s\n",
               dns_result_totext(dns_result));
    }

    return (result);
}

static void
t_dns_name_countlabels(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_countlabels", 1, T_REQUIRED, a35);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_countlabels_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 2) {
                /*
                 * name, nlabels.
                 */
                result = test_dns_name_countlabels(Tokens[0],
                                  atoi(Tokens[1]));
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_countlabels_data\n");
        t_result(result);
    }
}

static const char *a36 =
        "when n is less than the number of labels in name, "
        "dns_name_getlabel(name, n, labelp) initializes labelp "
        "to point to the nth label in name";

/*%
 * The strategy here is two take two dns names with a shared label in
 * different positions, get the two labels and compare them for equality.
 * If they don't match, dns_name_getlabel failed.
 */

static int
test_dns_name_getlabel(char *test_name1, int label1_pos, char *test_name2,
               int label2_pos)
{
    int     result;
    int     nfails;
    unsigned int    cnt;
    unsigned char   *p;
    unsigned char   *q;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    dns_label_t dns_label1;
    dns_label_t dns_label2;
    isc_result_t    dns_result;

    nfails = 0;
    result = T_UNRESOLVED;

    t_info("testing with %s and %s\n", test_name1, test_name2);

    dns_result = dname_from_tname(test_name1, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {
        dns_result = dname_from_tname(test_name2, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            dns_name_getlabel(&dns_name1, label1_pos, &dns_label1);
            dns_name_getlabel(&dns_name2, label2_pos, &dns_label2);
            if (dns_label1.length != dns_label2.length) {
                t_info("label lengths differ\n");
                ++nfails;
            }
            p = dns_label1.base;
            q = dns_label2.base;
            for (cnt = 0; cnt < dns_label1.length; ++cnt) {
                if (*p++ != *q++) {
                    t_info("labels differ at position %d",
                           cnt);
                    ++nfails;
                }
            }
            if (nfails == 0)
                result = T_PASS;
            else
                result = T_FAIL;
        } else {
            t_info("dname_from_tname failed, result == %s",
                   dns_result_totext(result));
        }
    } else {
        t_info("dname_from_tname failed, result == %s",
               dns_result_totext(result));
    }
    return (result);
}

static void
t_dns_name_getlabel(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_getlabel", 1, T_REQUIRED, a36);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_getlabel_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 4) {
                /*
                 * name1, name2, nlabels.
                 */
                result = test_dns_name_getlabel(Tokens[0],
                                  atoi(Tokens[1]),
                                       Tokens[2],
                                  atoi(Tokens[3]));
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_getlabel_data\n");
        t_result(result);
    }
}

static const char *a37 =
        "when source contains at least first + n labels, "
        "dns_name_getlabelsequence(source, first, n, target) "
        "initializes target to point to the n label sequence of "
        "labels in source starting with first";

/*%
 * We adopt a similiar strategy to that used by the dns_name_getlabel test.
 */

static int
test_dns_name_getlabelsequence(char *test_name1, int label1_start,
                   char *test_name2, int label2_start, int range)
{
    int     result;
    int     nfails;
    unsigned int    cnt;
    unsigned char   *p;
    unsigned char   *q;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    dns_name_t  dns_targetname1;
    dns_name_t  dns_targetname2;
    isc_result_t    dns_result;
    isc_buffer_t    buffer1;
    isc_buffer_t    buffer2;
    unsigned char   junk1[BUFLEN];
    unsigned char   junk2[BUFLEN];

    nfails = 0;
    result = T_UNRESOLVED;
    dns_result = dname_from_tname(test_name1, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {
        dns_result = dname_from_tname(test_name2, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            t_info("testing %s %s\n", test_name1, test_name2);
            dns_name_init(&dns_targetname1, NULL);
            dns_name_init(&dns_targetname2, NULL);
            dns_name_getlabelsequence(&dns_name1, label1_start,
                          range, &dns_targetname1);
            dns_name_getlabelsequence(&dns_name2, label2_start,
                          range, &dns_targetname2);

            /*
             * Now convert both targets to text for comparison.
             */
            isc_buffer_init(&buffer1, junk1, BUFLEN);
            isc_buffer_init(&buffer2, junk2, BUFLEN);
            dns_name_totext(&dns_targetname1, ISC_TRUE, &buffer1);
            dns_name_totext(&dns_targetname2, ISC_TRUE, &buffer2);
            if (buffer1.used == buffer2.used) {
                p = buffer1.base;
                q = buffer2.base;
                for (cnt = 0; cnt < buffer1.used; ++cnt) {
                    if (*p != *q) {
                        ++nfails;
                        t_info("names differ at %d\n",
                               cnt);
                        break;
                    }
                    ++p; ++q;
                }
            } else {
                ++nfails;
                t_info("lengths differ\n");
            }
            if (nfails == 0)
                result = T_PASS;
            else
                result = T_FAIL;
        } else {
            t_info("dname_from_tname failed, result == %s",
                   dns_result_totext(dns_result));
        }
    } else {
        t_info("dname_from_tname failed, result == %s",
               dns_result_totext(dns_result));
    }
    return (result);
}

static void
t_dns_name_getlabelsequence(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_getlabelsequence", 1, T_REQUIRED, a37);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_getlabelsequence_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 5) {
                /*
                 * name1, name2, nlabels.
                 */
                result = test_dns_name_getlabelsequence(
                                   Tokens[0],
                                  atoi(Tokens[1]),
                                   Tokens[2],
                                  atoi(Tokens[3]),
                                  atoi(Tokens[4]));
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_getlabelsequence_data\n");
        t_result(result);
    }
}

static const char *a38 =
        "dns_name_fromregion(name, region) converts a DNS name "
        "from a region representation to a name representation";

static int
test_dns_name_fromregion(char *test_name) {
    int     result;
    int     order;
    unsigned int    nlabels;
    isc_result_t    dns_result;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    dns_namereln_t  dns_namereln;
    isc_region_t    region;

    result = T_UNRESOLVED;

    t_info("testing %s\n", test_name);

    dns_result = dname_from_tname(test_name, &dns_name1);
    if (dns_result == ISC_R_SUCCESS) {

        dns_name_toregion(&dns_name1, &region);

        dns_name_init(&dns_name2, NULL);
        dns_name_fromregion(&dns_name2, &region);
        dns_namereln = dns_name_fullcompare(&dns_name1, &dns_name2,
                            &order, &nlabels);
        if (dns_namereln == dns_namereln_equal)
            result = T_PASS;
        else
            result = T_FAIL;
    } else {
        t_info("dname_from_tname failed, result == %s\n",
               dns_result_totext(result));
    }
    return (result);
}

static void
t_dns_name_fromregion(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_fromregion", 1, T_REQUIRED, a38);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_fromregion_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 1) {
                /*
                 * test_name.
                 */
                result = test_dns_name_fromregion(Tokens[0]);
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_fromregion_data\n");
        t_result(result);
    }
}

static const char *a39 =
        "dns_name_toregion(name, region) converts a DNS name "
        "from a region representation to a name representation";

static void
t_dns_name_toregion(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_toregion", 1, T_REQUIRED, a39);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_toregion_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 1) {
                /*
                 * test_name.
                 */
                result = test_dns_name_fromregion(Tokens[0]);
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_toregion_data\n");
        t_result(result);
    }
}

static const char *a40 =
        "dns_name_fromtext(name, source, origin, downcase, target) "
        "converts the textual representation of a DNS name at source "
        "into uncompressed wire form at target, appending origin to "
        "the converted name if origin is non-NULL and converting "
        "upper case to lower case during conversion "
        "if downcase is true.";

static int
test_dns_name_fromtext(char *test_name1, char *test_name2, char *test_origin,
               isc_boolean_t downcase)
{
    int     result;
    int     order;
    unsigned int    nlabels;
    unsigned char   junk1[BUFLEN];
    unsigned char   junk2[BUFLEN];
    unsigned char   junk3[BUFLEN];
    isc_buffer_t    binbuf1;
    isc_buffer_t    binbuf2;
    isc_buffer_t    binbuf3;
    isc_buffer_t    txtbuf1;
    isc_buffer_t    txtbuf2;
    isc_buffer_t    txtbuf3;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    dns_name_t  dns_name3;
    isc_result_t    dns_result;
    dns_namereln_t  dns_namereln;

    result = T_UNRESOLVED;

    t_info("testing %s %s %s\n", test_name1, test_name2, test_origin);

    isc_buffer_init(&binbuf1, junk1, BUFLEN);
    isc_buffer_init(&binbuf2, junk2, BUFLEN);
    isc_buffer_init(&binbuf3, junk3, BUFLEN);

    isc_buffer_init(&txtbuf1, test_name1, strlen(test_name1));
    isc_buffer_add(&txtbuf1, strlen(test_name1));

    isc_buffer_init(&txtbuf2, test_name2, strlen(test_name2));
    isc_buffer_add(&txtbuf2, strlen(test_name2));

    isc_buffer_init(&txtbuf3, test_origin, strlen(test_origin));
    isc_buffer_add(&txtbuf3, strlen(test_origin));
    dns_name_init(&dns_name1, NULL);
    dns_name_init(&dns_name2, NULL);
    dns_name_init(&dns_name3, NULL);
    dns_name_setbuffer(&dns_name1, &binbuf1);
    dns_name_setbuffer(&dns_name2, &binbuf2);
    dns_name_setbuffer(&dns_name3, &binbuf3);

    dns_result = dns_name_fromtext(&dns_name3,  &txtbuf3, NULL,
                        ISC_FALSE, &binbuf3);
    if (dns_result != ISC_R_SUCCESS) {
        t_info("dns_name_fromtext(dns_name3) failed, result == %s\n",
            dns_result_totext(dns_result));
        return (T_FAIL);
    }

    dns_result = dns_name_fromtext(&dns_name1, &txtbuf1, &dns_name3,
                       downcase, &binbuf1);
    if (dns_result != ISC_R_SUCCESS) {
        t_info("dns_name_fromtext(dns_name1) failed, result == %s\n",
               dns_result_totext(dns_result));
        return (T_FAIL);
    }

    dns_result = dns_name_fromtext(&dns_name2,  &txtbuf2, NULL,
                        ISC_FALSE, &binbuf2);
    if (dns_result != ISC_R_SUCCESS) {
        t_info("dns_name_fromtext(dns_name2) failed, result == %s\n",
               dns_result_totext(dns_result));
        return (T_FAIL);
    }

    dns_namereln = dns_name_fullcompare(&dns_name1, &dns_name2, &order,
                        &nlabels);

    if (dns_namereln == dns_namereln_equal)
        result = T_PASS;
    else {
        t_info("dns_name_fullcompare returned %s\n",
               dns_namereln_to_text(dns_namereln));
        result = T_FAIL;
    }

    return (result);
}

static void
t_dns_name_fromtext(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_fromtext", 1, T_REQUIRED, a40);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_fromtext_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 4) {
                /*
                 * test_name1, test_name2, test_origin,
                 * downcase.
                 */
                result = test_dns_name_fromtext(Tokens[0],
                                Tokens[1],
                                Tokens[2],
                               atoi(Tokens[3])
                                == 0 ?
                                ISC_FALSE :
                                ISC_TRUE);
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_fromtext\n");
        t_result(result);
    }
}

static const char *a41 =
        "dns_name_totext(name, omit_final_dot, target) converts "
        "the DNS name 'name' in wire format to textual format "
        "at target, and adds a final '.' to the name if "
        "omit_final_dot is false";

static int
test_dns_name_totext(char *test_name, isc_boolean_t omit_final) {
    int     result;
    int     len;
    int     order;
    unsigned int    nlabels;
    unsigned char   junk1[BUFLEN];
    unsigned char   junk2[BUFLEN];
    unsigned char   junk3[BUFLEN];
    isc_buffer_t    buf1;
    isc_buffer_t    buf2;
    isc_buffer_t    buf3;
    dns_name_t  dns_name1;
    dns_name_t  dns_name2;
    isc_result_t    dns_result;
    dns_namereln_t  dns_namereln;

    result = T_UNRESOLVED;

    t_info("testing %s\n", test_name);

    len = strlen(test_name);
    isc_buffer_init(&buf1, test_name, len);
    isc_buffer_add(&buf1, len);

    dns_name_init(&dns_name1, NULL);
    isc_buffer_init(&buf2, junk2, BUFLEN);

    /*
     * Out of the data file to dns_name1.
     */
    dns_result = dns_name_fromtext(&dns_name1, &buf1, NULL, ISC_FALSE,
                       &buf2);
    if (dns_result != ISC_R_SUCCESS) {
        t_info("dns_name_fromtext failed, result == %s\n",
               dns_result_totext(dns_result));
        return (T_UNRESOLVED);
    }

    /*
     * From dns_name1 into a text buffer.
     */
    isc_buffer_invalidate(&buf1);
    isc_buffer_init(&buf1, junk1, BUFLEN);
    dns_result = dns_name_totext(&dns_name1, omit_final, &buf1);
    if (dns_result != ISC_R_SUCCESS) {
        t_info("dns_name_totext failed, result == %s\n",
               dns_result_totext(dns_result));
        return (T_FAIL);
    }

    /*
     * From the text buffer into dns_name2.
     */
    dns_name_init(&dns_name2, NULL);
    isc_buffer_init(&buf3, junk3, BUFLEN);
    dns_result = dns_name_fromtext(&dns_name2, &buf1, NULL, ISC_FALSE,
                       &buf3);
    if (dns_result != ISC_R_SUCCESS) {
        t_info("dns_name_fromtext failed, result == %s\n",
               dns_result_totext(dns_result));
        return (T_UNRESOLVED);
    }

    dns_namereln = dns_name_fullcompare(&dns_name1, &dns_name2,
                        &order, &nlabels);
    if (dns_namereln == dns_namereln_equal)
        result = T_PASS;
    else {
        t_info("dns_name_fullcompare returned %s\n",
               dns_namereln_to_text(dns_namereln));
        result = T_FAIL;
    }

    return (result);
}

static void
t_dns_name_totext(void) {
    int     line;
    int     cnt;
    int     result;
    char        *p;
    FILE        *fp;

    t_assert("dns_name_totext", 1, T_REQUIRED, a41);

    result = T_UNRESOLVED;
    fp = fopen("dns_name_totext_data", "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 2) {
                /*
                 * test_name, omit_final.
                 */
                result = test_dns_name_totext(Tokens[0],
                             atoi(Tokens[1]) == 0 ?
                                  ISC_FALSE :
                                  ISC_TRUE);
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile dns_name_totext\n");
        t_result(result);
    }
}

static const char *a42 =
        "dns_name_fromwire(name, source, dctx, downcase, target) "
        "converts the possibly compressed DNS name 'name' in wire "
        "format to canonicalized form at target, performing upper to "
        "lower case conversion if downcase is true, and returns "
        "ISC_R_SUCCESS";

#if 0
    /*
     * XXXRTH these tests appear to be broken, so I have
     * disabled them.
     */
static const char *a43 =
        "when a label length is invalid, dns_name_fromwire() "
        "returns DNS_R_FORMERR";

static const char *a44 =
        "when a label type is invalid, dns_name_fromwire() "
        "returns DNS_R_BADLABELTYPE";
#endif

static const char *a45 =
        "when a name length is invalid, dns_name_fromwire() "
        "returns DNS_R_FORMERR";

static const char *a46 =
        "when a compression type is invalid, dns_name_fromwire() "
        "returns DNS_R_DISALLOWED";

static const char *a47 =
        "when a bad compression pointer is encountered, "
        "dns_name_fromwire() returns DNS_R_BADPOINTER";

static const char *a48 =
        "when input ends unexpected, dns_name_fromwire() "
        "returns ISC_R_UNEXPECTEDEND";

static const char *a49 =
        "when there is not enough space in target, "
        "dns_name_fromwire(name, source, dcts, downcase, target) "
        "returns ISC_R_NOSPACE";

static int
test_dns_name_fromwire(char *datafile_name, int testname_offset, int downcase,
               unsigned int dc_method, char *exp_name,
               isc_result_t exp_result, size_t buflen)
{
    int         result;
    int         order;
    unsigned int        nlabels;
    int         len;
    unsigned char       buf1[BIGBUFLEN];
    char            buf2[BUFLEN];
    isc_buffer_t        iscbuf1;
    isc_buffer_t        iscbuf2;
    dns_name_t      dns_name1;
    dns_name_t      dns_name2;
    isc_result_t        dns_result;
    dns_namereln_t      dns_namereln;
    dns_decompress_t    dctx;

    result = T_UNRESOLVED;

    t_info("testing using %s\n", datafile_name);
    len = getmsg(datafile_name, buf1, BIGBUFLEN, &iscbuf1);

    isc_buffer_setactive(&iscbuf1, len);
    iscbuf1.current = testname_offset;

    isc_buffer_init(&iscbuf2, buf2, buflen);
    dns_name_init(&dns_name1, NULL);
    dns_decompress_init(&dctx, -1, DNS_DECOMPRESS_STRICT);
    dns_decompress_setmethods(&dctx, dc_method);
    dns_result = dns_name_fromwire(&dns_name1, &iscbuf1,
                       &dctx, downcase ? ISC_TRUE : ISC_FALSE,
                       &iscbuf2);

    if ((dns_result == exp_result) && (exp_result == ISC_R_SUCCESS)) {

        dns_result = dname_from_tname(exp_name, &dns_name2);
        if (dns_result == ISC_R_SUCCESS) {
            dns_namereln = dns_name_fullcompare(&dns_name1,
                                &dns_name2,
                                &order, &nlabels);
            if (dns_namereln != dns_namereln_equal) {
                t_info("dns_name_fullcompare  returned %s\n",
                       dns_namereln_to_text(dns_namereln));
                result = T_FAIL;
            } else {
                result = T_PASS;
            }
        } else {
            t_info("dns_name_fromtext %s failed, result = %s\n",
                   exp_name, dns_result_totext(dns_result));
            result = T_UNRESOLVED;
        }
    } else if (dns_result == exp_result) {
        result = T_PASS;
    } else {
        t_info("dns_name_fromwire returned %s\n",
               dns_result_totext(dns_result));
        result = T_FAIL;
    }

    return (result);
}

static void
t_dns_name_fromwire_x(const char *testfile, size_t buflen) {
    int     line;
    int     cnt;
    int     result;
    unsigned int    dc_method;
    isc_result_t    exp_result;
    char        *p;
    char        *tok;
    FILE        *fp;

    result = T_UNRESOLVED;
    fp = fopen(testfile, "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 6) {
                /*
                 *  datafile_name, testname_offset,
                 *  downcase, dc_method,
                 *  exp_name, exp_result.
                 */

                tok = Tokens[5];
                exp_result = ISC_R_SUCCESS;
                if (! strcmp(tok, "ISC_R_SUCCESS"))
                    exp_result = ISC_R_SUCCESS;
                else if (! strcmp(tok, "ISC_R_NOSPACE"))
                    exp_result = ISC_R_NOSPACE;
                else if (! strcmp(tok, "DNS_R_BADLABELTYPE"))
                    exp_result = DNS_R_BADLABELTYPE;
                else if (! strcmp(tok, "DNS_R_FORMERR"))
                    exp_result = DNS_R_FORMERR;
                else if (! strcmp(tok, "DNS_R_BADPOINTER"))
                    exp_result = DNS_R_BADPOINTER;
                else if (! strcmp(tok, "ISC_R_UNEXPECTEDEND"))
                    exp_result = ISC_R_UNEXPECTEDEND;
                else if (! strcmp(tok, "DNS_R_TOOMANYHOPS"))
                    exp_result = DNS_R_TOOMANYHOPS;
                else if (! strcmp(tok, "DNS_R_DISALLOWED"))
                    exp_result = DNS_R_DISALLOWED;
                else if (! strcmp(tok, "DNS_R_NAMETOOLONG"))
                    exp_result = DNS_R_NAMETOOLONG;

                tok = Tokens[3];
                dc_method = DNS_COMPRESS_NONE;
                if (! strcmp(tok, "DNS_COMPRESS_GLOBAL14"))
                    dc_method = DNS_COMPRESS_GLOBAL14;
                else if (! strcmp(tok, "DNS_COMPRESS_ALL"))
                    dc_method = DNS_COMPRESS_ALL;

                result = test_dns_name_fromwire(Tokens[0],
                               atoi(Tokens[1]),
                               atoi(Tokens[2]),
                                dc_method,
                                Tokens[4],
                                exp_result,
                                buflen);
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile %s\n", testfile);
        t_result(result);
    }
}

static void
t_dns_name_fromwire(void) {
    t_assert("dns_name_fromwire", 1, T_REQUIRED, a42);
    t_dns_name_fromwire_x("dns_name_fromwire_1_data", BUFLEN);

#if 0
    /*
     * XXXRTH these tests appear to be broken, so I have
     * disabled them.
     */
    t_assert("dns_name_fromwire", 2, T_REQUIRED, a43);
    t_dns_name_fromwire_x("dns_name_fromwire_2_data", BUFLEN);

    t_assert("dns_name_fromwire", 3, T_REQUIRED, a44);
    t_dns_name_fromwire_x("dns_name_fromwire_3_data", BUFLEN);
#endif

    t_assert("dns_name_fromwire", 4, T_REQUIRED, a45);
    t_dns_name_fromwire_x("dns_name_fromwire_4_data", BUFLEN);

    t_assert("dns_name_fromwire", 5, T_REQUIRED, a46);
    t_dns_name_fromwire_x("dns_name_fromwire_5_data", BUFLEN);

    t_assert("dns_name_fromwire", 6, T_REQUIRED, a47);
    t_dns_name_fromwire_x("dns_name_fromwire_6_data", BUFLEN);

    t_assert("dns_name_fromwire", 7, T_REQUIRED, a48);
    t_dns_name_fromwire_x("dns_name_fromwire_7_data", BUFLEN);

    t_assert("dns_name_fromwire", 9, T_REQUIRED, a49);
    t_dns_name_fromwire_x("dns_name_fromwire_8_data", 2);
}


static const char *a51 =
        "dns_name_towire(name, cctx, target) converts the DNS name "
        "'name' into wire format, compresses it as specified "
        "by the compression context cctx, stores the result in "
        "target and returns DNS_SUCCESS";

static const char *a52 =
        "when not enough space exists in target, "
        "dns_name_towire(name, cctx, target) returns ISC_R_NOSPACE";

static int
test_dns_name_towire(char *testname, unsigned int dc_method, char *exp_data,
             int exp_data_len, isc_result_t exp_result, size_t buflen)
{
    int         result;
    int         val;
    int         len;
    unsigned char       buf2[BUFLEN];
    unsigned char       buf3[BUFLEN];
    isc_buffer_t        iscbuf1;
    isc_buffer_t        iscbuf2;
    isc_buffer_t        iscbuf3;
    dns_name_t      dns_name;
    isc_result_t        dns_result;
    isc_result_t        isc_result;
    dns_compress_t      cctx;
    isc_mem_t       *mctx;

    t_info("testing using %s\n", testname);

    result = T_UNRESOLVED;
    mctx = NULL;

    isc_result = isc_mem_create(0, 0, &mctx);
    if (isc_result != ISC_R_SUCCESS) {
        t_info("isc_mem_create failed\n");
        return (result);
    }
    dns_compress_init(&cctx, -1, mctx);
    dns_compress_setmethods(&cctx, dc_method);
    dns_name_init(&dns_name, NULL);
    len = strlen(testname);
    isc_buffer_init(&iscbuf1, testname, len);
    isc_buffer_add(&iscbuf1, len);
    isc_buffer_init(&iscbuf2, buf2, BUFLEN);
    dns_result = dns_name_fromtext(&dns_name, &iscbuf1, NULL, ISC_FALSE,
                       &iscbuf2);
    if (dns_result == ISC_R_SUCCESS) {
        isc_buffer_init(&iscbuf3, buf3, buflen);
        dns_result = dns_name_towire(&dns_name, &cctx, &iscbuf3);
        if (dns_result == exp_result) {
            if (exp_result == ISC_R_SUCCESS) {
                /*
                 * Compare results with expected data.
                 */
                val = chkdata(buf3, iscbuf3.used, exp_data,
                          exp_data_len);
                if (val == 0)
                    result = T_PASS;
                else
                    result = T_FAIL;
            } else
                result = T_PASS;
        } else {
            t_info("dns_name_towire unexpectedly returned %s\n",
                   dns_result_totext(dns_result));
            result = T_FAIL;
        }
    } else {
        t_info("dns_name_fromtext %s failed, result = %s\n",
                testname, dns_result_totext(dns_result));
    }
    return (result);
}

static void
t_dns_name_towire_x(const char *testfile, size_t buflen) {
    int     line;
    int     cnt;
    int     result;
    unsigned int    dc_method;
    isc_result_t    exp_result;
    char        *p;
    FILE        *fp;

    result = T_UNRESOLVED;
    fp = fopen(testfile, "r");
    if (fp != NULL) {
        line = 0;
        while ((p = t_fgetbs(fp)) != NULL) {

            ++line;

            /*
             * Skip comment lines.
             */
            if ((isspace((unsigned char)*p)) || (*p == '#')) {
                (void)free(p);
                continue;
            }

            cnt = bustline(p, Tokens);
            if (cnt == 5) {
                /*
                 *  testname, dc_method,
                 *  exp_data, exp_data_len,
                 *  exp_result.
                 */

                dc_method = t_dc_method_fromtext(Tokens[3]);
                exp_result = t_dns_result_fromtext(Tokens[4]);

                result = test_dns_name_towire(Tokens[0],
                                  dc_method,
                                  Tokens[2],
                                  atoi(Tokens[3]),
                                  exp_result,
                                  buflen);
            } else {
                t_info("bad format at line %d\n", line);
            }

            (void)free(p);
            t_result(result);
        }
        (void)fclose(fp);
    } else {
        t_info("Missing datafile %s\n", testfile);
        t_result(result);
    }
}

static void
t_dns_name_towire_1(void) {
    t_assert("dns_name_towire", 1, T_REQUIRED, a51);
    t_dns_name_towire_x("dns_name_towire_1_data", BUFLEN);
}

static void
t_dns_name_towire_2(void) {
    t_assert("dns_name_towire", 2, T_REQUIRED, a52);
    t_dns_name_towire_x("dns_name_towire_2_data", 2);
}

static void
t_dns_name_towire(void) {
    t_dns_name_towire_1();
    t_dns_name_towire_2();
}

#if 0 /* This is silly.  A test should either exist, or not, but not
       * one that just returns "UNTESTED."
       */
static const char *a53 =
        "dns_name_concatenate(prefix, suffix, name, target) "
        "concatenates prefix and suffix, stores the result "
        "in target, canonicalizes any bitstring labels "
        "and returns ISC_R_SUCCESS";

static void
t_dns_name_concatenate(void) {
    t_assert("dns_name_concatenate", 1, T_REQUIRED, a53);
    t_result(T_UNTESTED);
}
#endif

testspec_t T_testlist[] = {
    {   t_dns_name_init,        "dns_name_init"     },
    {   t_dns_name_invalidate,      "dns_name_invalidate"   },
    {   t_dns_name_setbuffer,       "dns_name_setbuffer"    },
    {   t_dns_name_hasbuffer,       "dns_name_hasbuffer"    },
    {   t_dns_name_isabsolute,      "dns_name_isabsolute"   },
    {   t_dns_name_hash,        "dns_name_hash"     },
    {   t_dns_name_fullcompare,     "dns_name_fullcompare"  },
    {   t_dns_name_compare,     "dns_name_compare"  },
    {   t_dns_name_rdatacompare,    "dns_name_rdatacompare" },
    {   t_dns_name_issubdomain,     "dns_name_issubdomain"  },
    {   t_dns_name_countlabels,     "dns_name_countlabels"  },
    {   t_dns_name_getlabel,        "dns_name_getlabel" },
    {   t_dns_name_getlabelsequence,    "dns_name_getlabelsequence" },
    {   t_dns_name_fromregion,      "dns_name_fromregion"   },
    {   t_dns_name_toregion,        "dns_name_toregion" },
    {   t_dns_name_fromwire,        "dns_name_fromwire" },
    {   t_dns_name_towire,      "dns_name_towire"   },
    {   t_dns_name_fromtext,        "dns_name_fromtext" },
    {   t_dns_name_totext,      "dns_name_totext"   },
#if 0
    {   t_dns_name_concatenate,     "dns_name_concatenate"  },
#endif
    {   NULL,               NULL            }

};