rdata/generic/ipseckey_45.c

	ipseckey_45.c revision 70e5a7403f0e0a3bd292b8287c5fed5772c15270
c3c8823fed039b3a2b8e5ca8bc2f3301d1dd840eMark Andrews/*
c3c8823fed039b3a2b8e5ca8bc2f3301d1dd840eMark Andrews * Copyright (C) 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
c3c8823fed039b3a2b8e5ca8bc2f3301d1dd840eMark Andrews *
 * 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: ipseckey_45.c,v 1.4 2007/06/19 23:47:17 tbox Exp $ */

#ifndef RDATA_GENERIC_IPSECKEY_45_C
#define RDATA_GENERIC_IPSECKEY_45_C

#include <string.h>

#include <isc/net.h>

#define RRTYPE_IPSECKEY_ATTRIBUTES (0)

static inline isc_result_t
fromtext_ipseckey(ARGS_FROMTEXT) {
    isc_token_t token;
    dns_name_t name;
    isc_buffer_t buffer;
    unsigned int gateway;
    struct in_addr addr;
    unsigned char addr6[16];
    isc_region_t region;

    REQUIRE(type == 45);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(callbacks);

    /*
     * Precedence.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * Gateway type.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0x3U)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));
    gateway = token.value.as_ulong;

    /*
     * Algorithm.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint8_tobuffer(token.value.as_ulong, target));

    /*
     * Gateway.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                      ISC_FALSE));

    switch (gateway) {
    case 0:
        if (strcmp(DNS_AS_STR(token), ".") != 0)
            RETTOK(DNS_R_SYNTAX);
        break;

    case 1:
        if (getquad(DNS_AS_STR(token), &addr, lexer, callbacks) != 1)
            RETTOK(DNS_R_BADDOTTEDQUAD);
        isc_buffer_availableregion(target, &region);
        if (region.length < 4)
            return (ISC_R_NOSPACE);
        memcpy(region.base, &addr, 4);
        isc_buffer_add(target, 4);
        break;

    case 2:
        if (inet_pton(AF_INET6, DNS_AS_STR(token), addr6) != 1)
            RETTOK(DNS_R_BADAAAA);
        isc_buffer_availableregion(target, &region);
        if (region.length < 16)
            return (ISC_R_NOSPACE);
        memcpy(region.base, addr6, 16);
        isc_buffer_add(target, 16);
        break;

    case 3:
        dns_name_init(&name, NULL);
        buffer_fromregion(&buffer, &token.value.as_region);
        origin = (origin != NULL) ? origin : dns_rootname;
        RETTOK(dns_name_fromtext(&name, &buffer, origin,
                     options, target));
        break;
    }

    /*
     * Public key.
     */
    return (isc_base64_tobuffer(lexer, target, -1));
}

static inline isc_result_t
totext_ipseckey(ARGS_TOTEXT) {
    isc_region_t region;
    dns_name_t name;
    dns_name_t prefix;
    isc_boolean_t sub;
    char buf[sizeof("255 ")];
    unsigned short num;
    unsigned short gateway;

    REQUIRE(rdata->type == 45);
    REQUIRE(rdata->length >= 3);

    dns_name_init(&name, NULL);
    dns_name_init(&prefix, NULL);

    if (rdata->data[1] > 3U)
        return (ISC_R_NOTIMPLEMENTED);

        if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
                RETERR(str_totext("( ", target));

    /*
     * Precendence.
     */
    dns_rdata_toregion(rdata, &region);
    num = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    sprintf(buf, "%u ", num);
    RETERR(str_totext(buf, target));

    /*
     * Gateway type.
     */
    gateway = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    sprintf(buf, "%u ", gateway);
    RETERR(str_totext(buf, target));

    /*
     * Algorithm.
     */
    num = uint8_fromregion(&region);
    isc_region_consume(&region, 1);
    sprintf(buf, "%u ", num);
    RETERR(str_totext(buf, target));

    /*
     * Gateway.
     */
    switch (gateway) {
    case 0:
        RETERR(str_totext(".", target));
        break;

    case 1:
        RETERR(inet_totext(AF_INET, &region, target));
        isc_region_consume(&region, 4);
        break;

    case 2:
        RETERR(inet_totext(AF_INET6, &region, target));
        isc_region_consume(&region, 16);
        break;

    case 3:
        dns_name_fromregion(&name, &region);
        sub = name_prefix(&name, tctx->origin, &prefix);
        RETERR(dns_name_totext(&prefix, sub, target));
        isc_region_consume(&region, name_length(&name));
        break;
    }

    /*
     * Key.
     */
    if (region.length > 0U) {
        RETERR(str_totext(tctx->linebreak, target));
        RETERR(isc_base64_totext(&region, tctx->width - 2,
                     tctx->linebreak, target));
    }

        if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
                RETERR(str_totext(" )", target));
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_ipseckey(ARGS_FROMWIRE) {
        dns_name_t name;
    isc_region_t region;

    REQUIRE(type == 45);

    UNUSED(type);
    UNUSED(rdclass);

    dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

        dns_name_init(&name, NULL);

    isc_buffer_activeregion(source, &region);
    if (region.length < 3)
        return (ISC_R_UNEXPECTEDEND);

    switch (region.base[1]) {
    case 0:
        isc_buffer_forward(source, region.length);
        return (mem_tobuffer(target, region.base, region.length));

    case 1:
        if (region.length < 7)
            return (ISC_R_UNEXPECTEDEND);
        isc_buffer_forward(source, region.length);
        return (mem_tobuffer(target, region.base, region.length));

    case 2:
        if (region.length < 19)
            return (ISC_R_UNEXPECTEDEND);
        isc_buffer_forward(source, region.length);
        return (mem_tobuffer(target, region.base, region.length));

    case 3:
        RETERR(mem_tobuffer(target, region.base, 3));
        isc_buffer_forward(source, 3);
        RETERR(dns_name_fromwire(&name, source, dctx, options, target));
        isc_buffer_activeregion(source, &region);
        return(mem_tobuffer(target, region.base, region.length));

    default:
        return (ISC_R_NOTIMPLEMENTED);
    }
}

static inline isc_result_t
towire_ipseckey(ARGS_TOWIRE) {
    isc_region_t region;

    REQUIRE(rdata->type == 45);
    REQUIRE(rdata->length != 0);

    UNUSED(cctx);

    dns_rdata_toregion(rdata, &region);
    return (mem_tobuffer(target, region.base, region.length));
}

static inline int
compare_ipseckey(ARGS_COMPARE) {
    isc_region_t region1;
    isc_region_t region2;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 45);
    REQUIRE(rdata1->length >= 3);
    REQUIRE(rdata2->length >= 3);

    dns_rdata_toregion(rdata1, &region1);
    dns_rdata_toregion(rdata2, &region2);

    return (isc_region_compare(&region1, &region2));
}

static inline isc_result_t
fromstruct_ipseckey(ARGS_FROMSTRUCT) {
    dns_rdata_ipseckey_t *ipseckey = source;
    isc_region_t region;
    isc_uint32_t n;

    REQUIRE(type == 45);
    REQUIRE(source != NULL);
    REQUIRE(ipseckey->common.rdtype == type);
    REQUIRE(ipseckey->common.rdclass == rdclass);

    UNUSED(type);
    UNUSED(rdclass);

    if (ipseckey->gateway_type > 3U)
        return (ISC_R_NOTIMPLEMENTED);

    RETERR(uint8_tobuffer(ipseckey->precedence, target));
    RETERR(uint8_tobuffer(ipseckey->gateway_type, target));
    RETERR(uint8_tobuffer(ipseckey->algorithm, target));

    switch  (ipseckey->gateway_type) {
    case 0:
        break;

    case 1:
        n = ntohl(ipseckey->in_addr.s_addr);
        RETERR(uint32_tobuffer(n, target));
        break;

    case 2:
        RETERR(mem_tobuffer(target, ipseckey->in6_addr.s6_addr, 16));
        break;

    case 3:
        dns_name_toregion(&ipseckey->gateway, &region);
        RETERR(isc_buffer_copyregion(target, &region));
        break;
    }

    return (mem_tobuffer(target, ipseckey->key, ipseckey->keylength));
}

static inline isc_result_t
tostruct_ipseckey(ARGS_TOSTRUCT) {
    isc_region_t region;
    dns_rdata_ipseckey_t *ipseckey = target;
    dns_name_t name;
    isc_uint32_t n;

    REQUIRE(rdata->type == 45);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length >= 3);

    if (rdata->data[1] > 3U)
        return (ISC_R_NOTIMPLEMENTED);

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

    dns_name_init(&name, NULL);
    dns_rdata_toregion(rdata, &region);

    ipseckey->precedence = uint8_fromregion(&region);
    isc_region_consume(&region, 1);

    ipseckey->gateway_type = uint8_fromregion(&region);
    isc_region_consume(&region, 1);

    ipseckey->algorithm = uint8_fromregion(&region);
    isc_region_consume(&region, 1);

    switch (ipseckey->gateway_type) {
    case 0:
        break;

    case 1:
        n = uint32_fromregion(&region);
        ipseckey->in_addr.s_addr = htonl(n);
        isc_region_consume(&region, 4);
        break;

    case 2:
        memcpy(ipseckey->in6_addr.s6_addr, region.base, 16);
        isc_region_consume(&region, 16);
        break;

    case 3:
        dns_name_init(&ipseckey->gateway, NULL);
        dns_name_fromregion(&name, &region);
        RETERR(name_duporclone(&name, mctx, &ipseckey->gateway));
        isc_region_consume(&region, name_length(&name));
        break;
    }

    ipseckey->keylength = region.length;
    if (ipseckey->keylength != 0U) {
        ipseckey->key = mem_maybedup(mctx, region.base,
                         ipseckey->keylength);
        if (ipseckey->key == NULL) {
            if (ipseckey->gateway_type == 3)
                dns_name_free(&ipseckey->gateway,
                          ipseckey->mctx);
            return (ISC_R_NOMEMORY);
        }
    } else
        ipseckey->key = NULL;

    ipseckey->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_ipseckey(ARGS_FREESTRUCT) {
    dns_rdata_ipseckey_t *ipseckey = source;

    REQUIRE(source != NULL);
    REQUIRE(ipseckey->common.rdtype == 45);

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

    if (ipseckey->gateway_type == 3)
        dns_name_free(&ipseckey->gateway, ipseckey->mctx);

    if (ipseckey->key != NULL)
        isc_mem_free(ipseckey->mctx, ipseckey->key);

    ipseckey->mctx = NULL;
}

static inline isc_result_t
additionaldata_ipseckey(ARGS_ADDLDATA) {

    REQUIRE(rdata->type == 45);

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

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_ipseckey(ARGS_DIGEST) {
    isc_region_t region;

    REQUIRE(rdata->type == 45);

    dns_rdata_toregion(rdata, &region);
    return ((digest)(arg, &region));
}

static inline isc_boolean_t
checkowner_ipseckey(ARGS_CHECKOWNER) {

    REQUIRE(type == 45);

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

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_ipseckey(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == 45);

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

    return (ISC_TRUE);
}

#endif  /* RDATA_GENERIC_IPSECKEY_45_C */