/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * 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 1.14 2020/09/14 08:40:43 florian Exp $ */

#ifndef RDATA_GENERIC_IPSECKEY_45_C
#define RDATA_GENERIC_IPSECKEY_45_C

#include <string.h>

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

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

        dns_name_init(&name, NULL);

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

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

        /*
         * Precedence.
         */
        dns_rdata_toregion(rdata, &region);
        num = uint8_fromregion(&region);
        isc_region_consume(&region, 1);
        snprintf(buf, sizeof(buf), "%u ", num);
        RETERR(isc_str_tobuffer(buf, target));

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

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

        /*
         * Gateway.
         */
        switch (gateway) {
        case 0:
                RETERR(isc_str_tobuffer(".", 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);
                RETERR(dns_name_totext(&name, 0, target));
                isc_region_consume(&region, name_length(&name));
                break;
        }

        /*
         * Key.
         */
        if (region.length > 0U) {
                RETERR(isc_str_tobuffer(tctx->linebreak, target));
                if (tctx->width == 0)   /* No splitting */
                        RETERR(isc_base64_totext(&region, 60, "", target));
                else
                        RETERR(isc_base64_totext(&region, tctx->width - 2,
                                                 tctx->linebreak, target));
        }

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

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

        REQUIRE(type == dns_rdatatype_ipseckey);

        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 (isc_mem_tobuffer(target, region.base, region.length));

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

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

        case 3:
                RETERR(isc_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);
                isc_buffer_forward(source, region.length);
                return(isc_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 == dns_rdatatype_ipseckey);
        REQUIRE(rdata->length != 0);

        UNUSED(cctx);

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

#endif  /* RDATA_GENERIC_IPSECKEY_45_C */