rdata/generic/txt_16.c

	txt_16.c revision ec5347e2c775f027573ce5648b910361aa926c01
/*
 * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2002  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: txt_16.c,v 1.42 2007/06/18 23:47:43 tbox Exp $ */

/* Reviewed: Thu Mar 16 15:40:00 PST 2000 by bwelling */

#ifndef RDATA_GENERIC_TXT_16_C
#define RDATA_GENERIC_TXT_16_C

#define RRTYPE_TXT_ATTRIBUTES (0)

static inline isc_result_t
fromtext_txt(ARGS_FROMTEXT) {
    isc_token_t token;
    int strings;

    REQUIRE(type == 16);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(origin);
    UNUSED(options);
    UNUSED(callbacks);

    strings = 0;
    for (;;) {
        RETERR(isc_lex_getmastertoken(lexer, &token,
                          isc_tokentype_qstring,
                          ISC_TRUE));
        if (token.type != isc_tokentype_qstring &&
            token.type != isc_tokentype_string)
            break;
        RETTOK(txt_fromtext(&token.value.as_textregion, target));
        strings++;
    }
    /* Let upper layer handle eol/eof. */
    isc_lex_ungettoken(lexer, &token);
    return (strings == 0 ? ISC_R_UNEXPECTEDEND : ISC_R_SUCCESS);
}

static inline isc_result_t
totext_txt(ARGS_TOTEXT) {
    isc_region_t region;

    UNUSED(tctx);

    REQUIRE(rdata->type == 16);

    dns_rdata_toregion(rdata, &region);

    while (region.length > 0) {
        RETERR(txt_totext(&region, target));
        if (region.length > 0)
            RETERR(str_totext(" ", target));
    }

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_txt(ARGS_FROMWIRE) {
    isc_result_t result;

    REQUIRE(type == 16);

    UNUSED(type);
    UNUSED(dctx);
    UNUSED(rdclass);
    UNUSED(options);

    do {
        result = txt_fromwire(source, target);
        if (result != ISC_R_SUCCESS)
            return (result);
    } while (!buffer_empty(source));
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_txt(ARGS_TOWIRE) {
    isc_region_t region;

    REQUIRE(rdata->type == 16);

    UNUSED(cctx);

    isc_buffer_availableregion(target, &region);
    if (region.length < rdata->length)
        return (ISC_R_NOSPACE);

    memcpy(region.base, rdata->data, rdata->length);
    isc_buffer_add(target, rdata->length);
    return (ISC_R_SUCCESS);
}

static inline int
compare_txt(ARGS_COMPARE) {
    isc_region_t r1;
    isc_region_t r2;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 16);

    dns_rdata_toregion(rdata1, &r1);
    dns_rdata_toregion(rdata2, &r2);
    return (isc_region_compare(&r1, &r2));
}

static inline isc_result_t
fromstruct_txt(ARGS_FROMSTRUCT) {
    dns_rdata_txt_t *txt = source;
    isc_region_t region;
    isc_uint8_t length;

    REQUIRE(type == 16);
    REQUIRE(source != NULL);
    REQUIRE(txt->common.rdtype == type);
    REQUIRE(txt->common.rdclass == rdclass);
    REQUIRE(txt->txt != NULL && txt->txt_len != 0);

    UNUSED(type);
    UNUSED(rdclass);

    region.base = txt->txt;
    region.length = txt->txt_len;
    while (region.length > 0) {
        length = uint8_fromregion(&region);
        isc_region_consume(&region, 1);
        if (region.length <= length)
            return (ISC_R_UNEXPECTEDEND);
        isc_region_consume(&region, length);
    }

    return (mem_tobuffer(target, txt->txt, txt->txt_len));
}

static inline isc_result_t
tostruct_txt(ARGS_TOSTRUCT) {
    dns_rdata_txt_t *txt = target;
    isc_region_t r;

    REQUIRE(rdata->type == 16);
    REQUIRE(target != NULL);

    txt->common.rdclass = rdata->rdclass;
    txt->common.rdtype = rdata->type;
    ISC_LINK_INIT(&txt->common, link);

    dns_rdata_toregion(rdata, &r);
    txt->txt_len = r.length;
    txt->txt = mem_maybedup(mctx, r.base, r.length);
    if (txt->txt == NULL)
        return (ISC_R_NOMEMORY);

    txt->offset = 0;
    txt->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_txt(ARGS_FREESTRUCT) {
    dns_rdata_txt_t *txt = source;

    REQUIRE(source != NULL);
    REQUIRE(txt->common.rdtype == 16);

    if (txt->mctx == NULL)
        return;

    if (txt->txt != NULL)
        isc_mem_free(txt->mctx, txt->txt);
    txt->mctx = NULL;
}

static inline isc_result_t
additionaldata_txt(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == 16);

    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_txt(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == 16);

    dns_rdata_toregion(rdata, &r);

    return ((digest)(arg, &r));
}

static inline isc_boolean_t
checkowner_txt(ARGS_CHECKOWNER) {

    REQUIRE(type == 16);

    UNUSED(name);
    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(wildcard);

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_txt(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == 16);

    UNUSED(rdata);
    UNUSED(owner);
    UNUSED(bad);

    return (ISC_TRUE);
}

#endif  /* RDATA_GENERIC_TXT_16_C */