rdata/in_1/a_1.h

	a_1.h revision 5d51e67c3b4f35c1be742574aacc1d88fe6ed444
/*
 * Copyright (C) 1998  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.
 */

#ifndef RDATA_IN_1_A_1_H
#define RDATA_IN_1_A_1_H
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <string.h>

static dns_result_t
fromtext_in_a(dns_rdataclass_t class, dns_rdatatype_t type,
          isc_lex_t *lexer, dns_name_t *origin,
          isc_boolean_t downcase, isc_buffer_t *target) {
    isc_token_t token;
    struct in_addr addr;
    isc_region_t region;

    INSIST(type == 1);
    class = class;      /*unused*/
    origin = origin;    /*unused*/
    downcase = downcase;    /*unused*/

    if (isc_lex_gettoken(lexer, 0, &token) != ISC_R_SUCCESS)
        return (DNS_R_UNKNOWN);
    if (token.type != isc_tokentype_string)
        return (DNS_R_UNKNOWN);

    if (inet_aton(token.value.as_pointer , &addr) != 1)
        return (DNS_R_UNKNOWN);
    isc_buffer_available(target, &region);
    if (region.length < 4)
        return (DNS_R_NOSPACE);
    memcpy(region.base, &addr, 4);
    isc_buffer_add(target, 4);
    return (DNS_R_SUCCESS);
}

static dns_result_t
totext_in_a(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
    isc_region_t region;

    INSIST(rdata->type == 1);
    INSIST(rdata->class == 1);
    INSIST(rdata->length == 4);

    origin = origin;    /* unused */

    isc_buffer_available(target, &region);
    if (inet_ntop(AF_INET, rdata->data,
              region.base, region.length) == NULL)
        return (DNS_R_NOSPACE);

    isc_buffer_add(target, strlen(region.base));
    return (DNS_R_SUCCESS);
}

static dns_result_t
fromwire_in_a(dns_rdataclass_t class, dns_rdatatype_t type,
          isc_buffer_t *source, dns_decompress_t *dctx,
          isc_boolean_t downcase, isc_buffer_t *target) {
    isc_region_t sregion;
    isc_region_t tregion;

    INSIST(class == 1);
    INSIST(type == 1);

    dctx = dctx;        /* unused */
    downcase = downcase;    /* unused */


    isc_buffer_remaining(source, &sregion);
    isc_buffer_available(target, &tregion);
    if (sregion.length != 4)
        return (DNS_R_WIRE);
    if (tregion.length < 4)
        return (DNS_R_NOSPACE);

    memcpy(tregion.base, sregion.base, 4);
    isc_buffer_forward(source, 4);
    isc_buffer_add(target, 4);
    return (DNS_R_SUCCESS);
}

static dns_result_t
towire_in_a(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
    isc_region_t region;

    cctx = cctx;

    isc_buffer_available(target, &region);
    if (region.length < rdata->length)
        return (DNS_R_NOSPACE);
    memcpy(region.base, rdata->data, rdata->length);
    isc_buffer_add(target, 4);
    return (DNS_R_SUCCESS);
}

static int
compare_in_a(dns_rdata_t *rdata1, dns_rdata_t *rdata2) {
    int result;

    result = memcmp(rdata1->data, rdata2->data, 4);
    if (result != 0)
        result = (result < 0) ? -1 : 1;

    return (result);
}

static dns_result_t
fromstruct_in_a(dns_rdataclass_t class, dns_rdatatype_t type, void *source,
         isc_buffer_t *target) {
    class = class;
    type = type;
    source = source;
    target = target;

    return (DNS_R_NOTIMPLEMENTED);
}

static dns_result_t
tostruct_in_a(dns_rdata_t *rdata, void *target) {
    rdata = rdata;
    target = target;

    return (DNS_R_NOTIMPLEMENTED);
}
#endif