diff options
Diffstat (limited to 'lib/dns/rdata/generic/amtrelay_260.c')
| -rw-r--r-- | lib/dns/rdata/generic/amtrelay_260.c | 472 |
1 files changed, 472 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/amtrelay_260.c b/lib/dns/rdata/generic/amtrelay_260.c new file mode 100644 index 0000000..a6d30e1 --- /dev/null +++ b/lib/dns/rdata/generic/amtrelay_260.c @@ -0,0 +1,472 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#ifndef RDATA_GENERIC_AMTRELAY_260_C +#define RDATA_GENERIC_AMTRELAY_260_C + +#include <string.h> + +#include <isc/net.h> + +#define RRTYPE_AMTRELAY_ATTRIBUTES (0) + +static isc_result_t +fromtext_amtrelay(ARGS_FROMTEXT) { + isc_token_t token; + dns_name_t name; + isc_buffer_t buffer; + unsigned int discovery; + unsigned int gateway; + struct in_addr addr; + unsigned char addr6[16]; + isc_region_t region; + + REQUIRE(type == dns_rdatatype_amtrelay); + + UNUSED(type); + UNUSED(rdclass); + UNUSED(callbacks); + + /* + * Precedence. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, + false)); + if (token.value.as_ulong > 0xffU) { + RETTOK(ISC_R_RANGE); + } + RETERR(uint8_tobuffer(token.value.as_ulong, target)); + + /* + * Discovery. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, + false)); + if (token.value.as_ulong > 1U) { + RETTOK(ISC_R_RANGE); + } + discovery = token.value.as_ulong; + + /* + * Gateway type. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, + false)); + if (token.value.as_ulong > 0x7fU) { + RETTOK(ISC_R_RANGE); + } + RETERR(uint8_tobuffer(token.value.as_ulong | (discovery << 7), target)); + gateway = token.value.as_ulong; + + if (gateway == 0) { + return (ISC_R_SUCCESS); + } + + if (gateway > 3) { + return (ISC_R_NOTIMPLEMENTED); + } + + /* + * Gateway. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, + false)); + + switch (gateway) { + case 1: + if (inet_pton(AF_INET, DNS_AS_STR(token), &addr) != 1) { + RETTOK(DNS_R_BADDOTTEDQUAD); + } + isc_buffer_availableregion(target, ®ion); + if (region.length < 4) { + return (ISC_R_NOSPACE); + } + memmove(region.base, &addr, 4); + isc_buffer_add(target, 4); + return (ISC_R_SUCCESS); + + case 2: + if (inet_pton(AF_INET6, DNS_AS_STR(token), addr6) != 1) { + RETTOK(DNS_R_BADAAAA); + } + isc_buffer_availableregion(target, ®ion); + if (region.length < 16) { + return (ISC_R_NOSPACE); + } + memmove(region.base, addr6, 16); + isc_buffer_add(target, 16); + return (ISC_R_SUCCESS); + + case 3: + dns_name_init(&name, NULL); + buffer_fromregion(&buffer, &token.value.as_region); + if (origin == NULL) { + origin = dns_rootname; + } + return (dns_name_fromtext(&name, &buffer, origin, options, + target)); + default: + UNREACHABLE(); + } +} + +static isc_result_t +totext_amtrelay(ARGS_TOTEXT) { + isc_region_t region; + dns_name_t name; + char buf[sizeof("0 255 ")]; + unsigned char precedence; + unsigned char discovery; + unsigned char gateway; + const char *space; + + UNUSED(tctx); + + REQUIRE(rdata->type == dns_rdatatype_amtrelay); + REQUIRE(rdata->length >= 2); + + if ((rdata->data[1] & 0x7f) > 3U) { + return (ISC_R_NOTIMPLEMENTED); + } + + /* + * Precedence. + */ + dns_rdata_toregion(rdata, ®ion); + precedence = uint8_fromregion(®ion); + isc_region_consume(®ion, 1); + snprintf(buf, sizeof(buf), "%u ", precedence); + RETERR(str_totext(buf, target)); + + /* + * Discovery and Gateway type. + */ + gateway = uint8_fromregion(®ion); + discovery = gateway >> 7; + gateway &= 0x7f; + space = (gateway != 0U) ? " " : ""; + isc_region_consume(®ion, 1); + snprintf(buf, sizeof(buf), "%u %u%s", discovery, gateway, space); + RETERR(str_totext(buf, target)); + + /* + * Gateway. + */ + switch (gateway) { + case 0: + break; + case 1: + return (inet_totext(AF_INET, tctx->flags, ®ion, target)); + + case 2: + return (inet_totext(AF_INET6, tctx->flags, ®ion, target)); + + case 3: + dns_name_init(&name, NULL); + dns_name_fromregion(&name, ®ion); + return (dns_name_totext(&name, false, target)); + + default: + UNREACHABLE(); + } + return (ISC_R_SUCCESS); +} + +static isc_result_t +fromwire_amtrelay(ARGS_FROMWIRE) { + dns_name_t name; + isc_region_t region; + + REQUIRE(type == dns_rdatatype_amtrelay); + + UNUSED(type); + UNUSED(rdclass); + + dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); + + isc_buffer_activeregion(source, ®ion); + if (region.length < 2) { + return (ISC_R_UNEXPECTEDEND); + } + + switch (region.base[1] & 0x7f) { + case 0: + if (region.length != 2) { + return (DNS_R_FORMERR); + } + isc_buffer_forward(source, region.length); + return (mem_tobuffer(target, region.base, region.length)); + + case 1: + if (region.length != 6) { + return (DNS_R_FORMERR); + } + isc_buffer_forward(source, region.length); + return (mem_tobuffer(target, region.base, region.length)); + + case 2: + if (region.length != 18) { + return (DNS_R_FORMERR); + } + isc_buffer_forward(source, region.length); + return (mem_tobuffer(target, region.base, region.length)); + + case 3: + RETERR(mem_tobuffer(target, region.base, 2)); + isc_buffer_forward(source, 2); + dns_name_init(&name, NULL); + return (dns_name_fromwire(&name, source, dctx, options, + target)); + + default: + isc_buffer_forward(source, region.length); + return (mem_tobuffer(target, region.base, region.length)); + } +} + +static isc_result_t +towire_amtrelay(ARGS_TOWIRE) { + isc_region_t region; + + REQUIRE(rdata->type == dns_rdatatype_amtrelay); + REQUIRE(rdata->length != 0); + + UNUSED(cctx); + + dns_rdata_toregion(rdata, ®ion); + return (mem_tobuffer(target, region.base, region.length)); +} + +static int +compare_amtrelay(ARGS_COMPARE) { + isc_region_t region1; + isc_region_t region2; + + REQUIRE(rdata1->type == rdata2->type); + REQUIRE(rdata1->rdclass == rdata2->rdclass); + REQUIRE(rdata1->type == dns_rdatatype_amtrelay); + REQUIRE(rdata1->length >= 2); + REQUIRE(rdata2->length >= 2); + + dns_rdata_toregion(rdata1, ®ion1); + dns_rdata_toregion(rdata2, ®ion2); + + return (isc_region_compare(®ion1, ®ion2)); +} + +static isc_result_t +fromstruct_amtrelay(ARGS_FROMSTRUCT) { + dns_rdata_amtrelay_t *amtrelay = source; + isc_region_t region; + uint32_t n; + + REQUIRE(type == dns_rdatatype_amtrelay); + REQUIRE(amtrelay != NULL); + REQUIRE(amtrelay->common.rdtype == type); + REQUIRE(amtrelay->common.rdclass == rdclass); + + UNUSED(type); + UNUSED(rdclass); + + RETERR(uint8_tobuffer(amtrelay->precedence, target)); + n = (amtrelay->discovery ? 0x80 : 0) | amtrelay->gateway_type; + RETERR(uint8_tobuffer(n, target)); + + switch (amtrelay->gateway_type) { + case 0: + return (ISC_R_SUCCESS); + + case 1: + n = ntohl(amtrelay->in_addr.s_addr); + return (uint32_tobuffer(n, target)); + + case 2: + return (mem_tobuffer(target, amtrelay->in6_addr.s6_addr, 16)); + break; + + case 3: + dns_name_toregion(&amtrelay->gateway, ®ion); + return (isc_buffer_copyregion(target, ®ion)); + break; + + default: + return (mem_tobuffer(target, amtrelay->data, amtrelay->length)); + } +} + +static isc_result_t +tostruct_amtrelay(ARGS_TOSTRUCT) { + isc_region_t region; + dns_rdata_amtrelay_t *amtrelay = target; + dns_name_t name; + uint32_t n; + + REQUIRE(rdata->type == dns_rdatatype_amtrelay); + REQUIRE(amtrelay != NULL); + REQUIRE(rdata->length >= 2); + + amtrelay->common.rdclass = rdata->rdclass; + amtrelay->common.rdtype = rdata->type; + ISC_LINK_INIT(&amtrelay->common, link); + + dns_name_init(&amtrelay->gateway, NULL); + amtrelay->data = NULL; + + dns_name_init(&name, NULL); + dns_rdata_toregion(rdata, ®ion); + + amtrelay->precedence = uint8_fromregion(®ion); + isc_region_consume(®ion, 1); + + amtrelay->gateway_type = uint8_fromregion(®ion); + amtrelay->discovery = (amtrelay->gateway_type & 0x80) != 0; + amtrelay->gateway_type &= 0x7f; + isc_region_consume(®ion, 1); + + switch (amtrelay->gateway_type) { + case 0: + break; + + case 1: + n = uint32_fromregion(®ion); + amtrelay->in_addr.s_addr = htonl(n); + isc_region_consume(®ion, 4); + break; + + case 2: + memmove(amtrelay->in6_addr.s6_addr, region.base, 16); + isc_region_consume(®ion, 16); + break; + + case 3: + dns_name_fromregion(&name, ®ion); + name_duporclone(&name, mctx, &amtrelay->gateway); + isc_region_consume(®ion, name_length(&name)); + break; + + default: + if (region.length != 0) { + amtrelay->data = mem_maybedup(mctx, region.base, + region.length); + if (amtrelay->data == NULL) { + return (ISC_R_NOMEMORY); + } + } + amtrelay->length = region.length; + } + amtrelay->mctx = mctx; + return (ISC_R_SUCCESS); +} + +static void +freestruct_amtrelay(ARGS_FREESTRUCT) { + dns_rdata_amtrelay_t *amtrelay = source; + + REQUIRE(amtrelay != NULL); + REQUIRE(amtrelay->common.rdtype == dns_rdatatype_amtrelay); + + if (amtrelay->mctx == NULL) { + return; + } + + if (amtrelay->gateway_type == 3) { + dns_name_free(&amtrelay->gateway, amtrelay->mctx); + } + + if (amtrelay->data != NULL) { + isc_mem_free(amtrelay->mctx, amtrelay->data); + } + + amtrelay->mctx = NULL; +} + +static isc_result_t +additionaldata_amtrelay(ARGS_ADDLDATA) { + REQUIRE(rdata->type == dns_rdatatype_amtrelay); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(add); + UNUSED(arg); + + return (ISC_R_SUCCESS); +} + +static isc_result_t +digest_amtrelay(ARGS_DIGEST) { + isc_region_t region; + + REQUIRE(rdata->type == dns_rdatatype_amtrelay); + + dns_rdata_toregion(rdata, ®ion); + return ((digest)(arg, ®ion)); +} + +static bool +checkowner_amtrelay(ARGS_CHECKOWNER) { + REQUIRE(type == dns_rdatatype_amtrelay); + + UNUSED(name); + UNUSED(type); + UNUSED(rdclass); + UNUSED(wildcard); + + return (true); +} + +static bool +checknames_amtrelay(ARGS_CHECKNAMES) { + REQUIRE(rdata->type == dns_rdatatype_amtrelay); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(bad); + + return (true); +} + +static int +casecompare_amtrelay(ARGS_COMPARE) { + isc_region_t region1; + isc_region_t region2; + dns_name_t name1; + dns_name_t name2; + + REQUIRE(rdata1->type == rdata2->type); + REQUIRE(rdata1->rdclass == rdata2->rdclass); + REQUIRE(rdata1->type == dns_rdatatype_amtrelay); + REQUIRE(rdata1->length >= 2); + REQUIRE(rdata2->length >= 2); + + dns_rdata_toregion(rdata1, ®ion1); + dns_rdata_toregion(rdata2, ®ion2); + + if (memcmp(region1.base, region2.base, 2) != 0 || + (region1.base[1] & 0x7f) != 3) + { + return (isc_region_compare(®ion1, ®ion2)); + } + + dns_name_init(&name1, NULL); + dns_name_init(&name2, NULL); + + isc_region_consume(®ion1, 2); + isc_region_consume(®ion2, 2); + + dns_name_fromregion(&name1, ®ion1); + dns_name_fromregion(&name2, ®ion2); + + return (dns_name_rdatacompare(&name1, &name2)); +} + +#endif /* RDATA_GENERIC_AMTRELAY_260_C */ |