Initial Implementation.

lib/dns/rdata/in_1/a6_38.c

+/*
+ * Copyright (C) 1999 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.
+ */
+
+ /* $Id: a6_38.c,v 1.1 1999/02/02 04:52:31 marka Exp $ */
+
+ /* draft-ietf-ipngwg-dns-lookups-03.txt */
+
+#ifndef RDATA_IN_1_A6_28_H
+#define RDATA_IN_1_A6_28_H
+
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <isc/inet.h>
+
+#ifndef MAX
+#define MAX(A, B) ((A > B) ? (A) : (B))
+#endif
+
+static dns_result_t
+fromtext_in_a6(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;
+	unsigned char addr[16];
+	unsigned char prefixlen;
+	unsigned char octets;
+	unsigned char mask;
+	dns_name_t name;
+	isc_buffer_t buffer;
+
+	REQUIRE(type == 38);
+	REQUIRE(class == 1);
+
+	/* prefix length */
+	RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
+	if (token.value.as_ulong > 128)
+		return (DNS_R_RANGE);
+
+	prefixlen = token.value.as_ulong;
+	RETERR(mem_tobuffer(target, &prefixlen, 1));
+
+	/* suffix */
+	if (prefixlen != 128) {
+		/* prefix 0..127 */
+		octets = prefixlen/8;
+		/* octets 0..15 */
+		RETERR(gettoken(lexer, &token, isc_tokentype_string,
+				ISC_FALSE));
+		if (isc_inet_pton(AF_INET6, token.value.as_pointer, &addr) != 1)
+			return (DNS_R_UNEXPECTED);
+		mask = 0xff >> (prefixlen % 8);
+		addr[octets] &= mask;
+		RETERR(mem_tobuffer(target, &addr[octets], 16 - octets));
+	}
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
+	dns_name_init(&name, NULL);
+	buffer_fromregion(&buffer, &token.value.as_region,
+			  ISC_BUFFERTYPE_TEXT);
+	origin = (origin != NULL) ? origin : dns_rootname;
+	return (dns_name_fromtext(&name, &buffer, origin, downcase, target));
+}
+
+static dns_result_t
+totext_in_a6(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
+	isc_region_t tr;
+	isc_region_t sr;
+	unsigned char addr[16];
+	unsigned char prefixlen;
+	unsigned char octets;
+	unsigned char mask;
+	char buf[sizeof "128"];
+	dns_name_t name;
+	dns_name_t prefix;
+	isc_boolean_t sub;
+
+	REQUIRE(rdata->type == 38);
+	REQUIRE(rdata->class == 1);
+
+	dns_rdata_toregion(rdata, &sr);
+	prefixlen = sr.base[0];
+	INSIST(prefixlen <= 128);
+	isc_region_consume(&sr, 1);
+	sprintf(buf, "%u", prefixlen);
+	RETERR(str_totext(buf, target));
+	RETERR(str_totext(" ", target));
+
+	if (prefixlen != 128) {
+		octets = prefixlen/8;
+		memset(&addr, 0, sizeof addr);
+		memcpy(&addr[octets], sr.base, 16 - octets);
+		mask = 0xff >> (prefixlen % 8);
+		addr[octets] &= mask;
+		isc_buffer_available(target, &tr);
+		if (isc_inet_ntop(AF_INET6, &addr,
+				  (char *)tr.base, tr.length) == NULL)
+			return (DNS_R_NOSPACE);
+
+		isc_buffer_add(target, strlen((char *)tr.base));
+		isc_region_consume(&sr, 16 - octets);
+	}
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	RETERR(str_totext(" ", target));
+	dns_name_init(&name, NULL);
+	dns_name_init(&prefix, NULL);
+	dns_name_fromregion(&name, &sr);
+	sub = name_prefix(&name, origin, &prefix);
+	return(dns_name_totext(&prefix, sub, target));
+}
+
+static dns_result_t
+fromwire_in_a6(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 sr;
+	unsigned char prefixlen;
+	unsigned char octets;
+	unsigned char mask;
+	dns_name_t name;
+
+	REQUIRE(type == 38);
+	REQUIRE(class == 1);
+
+	isc_buffer_active(source, &sr);
+	/* prefix length */
+	if (sr.length < 1)
+		return (DNS_R_UNEXPECTEDEND);
+	prefixlen = sr.base[0];
+	if (prefixlen > 128)
+		return (DNS_R_RANGE);
+	isc_region_consume(&sr, 1);
+	RETERR(mem_tobuffer(target, &prefixlen, 1));
+	isc_buffer_forward(source, 1);
+
+	/* suffix */
+	if (prefixlen != 128) {
+		octets = 16 - prefixlen / 8;
+		if (sr.length < octets)
+			return (DNS_R_UNEXPECTEDEND);
+		mask = 0xff >> (prefixlen % 8);
+		sr.base[0] &= mask;	/* ensure pad bits are zero */
+		RETERR(mem_tobuffer(target, sr.base, octets));
+		isc_buffer_forward(source, octets);
+	}
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	dns_name_init(&name, NULL);
+	return (dns_name_fromwire(&name, source, dctx, downcase, target));
+}
+
+static dns_result_t
+towire_in_a6(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
+	isc_region_t sr;
+	dns_name_t name;
+	unsigned char prefixlen;
+	unsigned char octets;
+
+	REQUIRE(rdata->type == 38);
+	REQUIRE(rdata->class == 1);
+
+	dns_rdata_toregion(rdata, &sr);
+	prefixlen = sr.base[0];
+	INSIST(prefixlen <= 128);
+
+	octets = 1 + 16 - prefixlen / 8;
+	RETERR(mem_tobuffer(target, sr.base, octets));
+	isc_region_consume(&sr, octets);
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	dns_name_init(&name, NULL);
+	dns_name_fromregion(&name, &sr);
+	return (dns_name_towire(&name, cctx, target));
+}
+
+static int
+compare_in_a6(dns_rdata_t *rdata1, dns_rdata_t *rdata2) {
+	int result;
+	unsigned char prefixlen;
+	unsigned char octets;
+	dns_name_t name1;
+	dns_name_t name2;
+	isc_region_t region1;
+	isc_region_t region2;
+	
+	REQUIRE(rdata1->type == rdata2->type);
+	REQUIRE(rdata1->class == rdata2->class);
+	REQUIRE(rdata1->type == 38);
+	REQUIRE(rdata1->class == 1);
+
+	dns_rdata_toregion(rdata1, &region1);
+	dns_rdata_toregion(rdata2, &region2);
+	prefixlen = MAX(region1.base[0], region2.base[0]);
+	octets = 1 + 16 - prefixlen / 8;
+
+	result = memcmp(region1.base, region2.base, octets);
+	if (result != 0)
+		result = (result < 0) ? -1 : 1;
+
+	isc_region_consume(&region1, octets);
+	isc_region_consume(&region2, octets);
+
+	dns_name_init(&name1, NULL);
+	dns_name_init(&name2, NULL);
+	dns_name_fromregion(&name1, &region1);
+	dns_name_fromregion(&name2, &region2);
+	return (dns_name_compare(&name1, &name2));
+}
+
+static dns_result_t
+fromstruct_in_a6(dns_rdataclass_t class, dns_rdatatype_t type, void *source,
+	     isc_buffer_t *target) {
+
+	REQUIRE(type == 1);
+	REQUIRE(class == 1);
+
+	source = source;
+	target = target;
+
+	return (DNS_R_NOTIMPLEMENTED);
+}
+
+static dns_result_t
+tostruct_in_a6(dns_rdata_t *rdata, void *target) {
+
+	REQUIRE(rdata->type == 38);
+	REQUIRE(rdata->class == 1);
+
+	target = target;
+
+	return (DNS_R_NOTIMPLEMENTED);
+}
+#endif	/* RDATA_IN_1_A6_38_H */

lib/dns/rdata/in_1/a6_38.h

+/*
+ * Copyright (C) 1999 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.
+ */
+
+ /* $Id: a6_38.h,v 1.1 1999/02/02 04:52:31 marka Exp $ */
+
+ /* draft-ietf-ipngwg-dns-lookups-03.txt */
+
+#ifndef RDATA_IN_1_A6_28_H
+#define RDATA_IN_1_A6_28_H
+
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <isc/inet.h>
+
+#ifndef MAX
+#define MAX(A, B) ((A > B) ? (A) : (B))
+#endif
+
+static dns_result_t
+fromtext_in_a6(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;
+	unsigned char addr[16];
+	unsigned char prefixlen;
+	unsigned char octets;
+	unsigned char mask;
+	dns_name_t name;
+	isc_buffer_t buffer;
+
+	REQUIRE(type == 38);
+	REQUIRE(class == 1);
+
+	/* prefix length */
+	RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
+	if (token.value.as_ulong > 128)
+		return (DNS_R_RANGE);
+
+	prefixlen = token.value.as_ulong;
+	RETERR(mem_tobuffer(target, &prefixlen, 1));
+
+	/* suffix */
+	if (prefixlen != 128) {
+		/* prefix 0..127 */
+		octets = prefixlen/8;
+		/* octets 0..15 */
+		RETERR(gettoken(lexer, &token, isc_tokentype_string,
+				ISC_FALSE));
+		if (isc_inet_pton(AF_INET6, token.value.as_pointer, &addr) != 1)
+			return (DNS_R_UNEXPECTED);
+		mask = 0xff >> (prefixlen % 8);
+		addr[octets] &= mask;
+		RETERR(mem_tobuffer(target, &addr[octets], 16 - octets));
+	}
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
+	dns_name_init(&name, NULL);
+	buffer_fromregion(&buffer, &token.value.as_region,
+			  ISC_BUFFERTYPE_TEXT);
+	origin = (origin != NULL) ? origin : dns_rootname;
+	return (dns_name_fromtext(&name, &buffer, origin, downcase, target));
+}
+
+static dns_result_t
+totext_in_a6(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target) {
+	isc_region_t tr;
+	isc_region_t sr;
+	unsigned char addr[16];
+	unsigned char prefixlen;
+	unsigned char octets;
+	unsigned char mask;
+	char buf[sizeof "128"];
+	dns_name_t name;
+	dns_name_t prefix;
+	isc_boolean_t sub;
+
+	REQUIRE(rdata->type == 38);
+	REQUIRE(rdata->class == 1);
+
+	dns_rdata_toregion(rdata, &sr);
+	prefixlen = sr.base[0];
+	INSIST(prefixlen <= 128);
+	isc_region_consume(&sr, 1);
+	sprintf(buf, "%u", prefixlen);
+	RETERR(str_totext(buf, target));
+	RETERR(str_totext(" ", target));
+
+	if (prefixlen != 128) {
+		octets = prefixlen/8;
+		memset(&addr, 0, sizeof addr);
+		memcpy(&addr[octets], sr.base, 16 - octets);
+		mask = 0xff >> (prefixlen % 8);
+		addr[octets] &= mask;
+		isc_buffer_available(target, &tr);
+		if (isc_inet_ntop(AF_INET6, &addr,
+				  (char *)tr.base, tr.length) == NULL)
+			return (DNS_R_NOSPACE);
+
+		isc_buffer_add(target, strlen((char *)tr.base));
+		isc_region_consume(&sr, 16 - octets);
+	}
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	RETERR(str_totext(" ", target));
+	dns_name_init(&name, NULL);
+	dns_name_init(&prefix, NULL);
+	dns_name_fromregion(&name, &sr);
+	sub = name_prefix(&name, origin, &prefix);
+	return(dns_name_totext(&prefix, sub, target));
+}
+
+static dns_result_t
+fromwire_in_a6(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 sr;
+	unsigned char prefixlen;
+	unsigned char octets;
+	unsigned char mask;
+	dns_name_t name;
+
+	REQUIRE(type == 38);
+	REQUIRE(class == 1);
+
+	isc_buffer_active(source, &sr);
+	/* prefix length */
+	if (sr.length < 1)
+		return (DNS_R_UNEXPECTEDEND);
+	prefixlen = sr.base[0];
+	if (prefixlen > 128)
+		return (DNS_R_RANGE);
+	isc_region_consume(&sr, 1);
+	RETERR(mem_tobuffer(target, &prefixlen, 1));
+	isc_buffer_forward(source, 1);
+
+	/* suffix */
+	if (prefixlen != 128) {
+		octets = 16 - prefixlen / 8;
+		if (sr.length < octets)
+			return (DNS_R_UNEXPECTEDEND);
+		mask = 0xff >> (prefixlen % 8);
+		sr.base[0] &= mask;	/* ensure pad bits are zero */
+		RETERR(mem_tobuffer(target, sr.base, octets));
+		isc_buffer_forward(source, octets);
+	}
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	dns_name_init(&name, NULL);
+	return (dns_name_fromwire(&name, source, dctx, downcase, target));
+}
+
+static dns_result_t
+towire_in_a6(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
+	isc_region_t sr;
+	dns_name_t name;
+	unsigned char prefixlen;
+	unsigned char octets;
+
+	REQUIRE(rdata->type == 38);
+	REQUIRE(rdata->class == 1);
+
+	dns_rdata_toregion(rdata, &sr);
+	prefixlen = sr.base[0];
+	INSIST(prefixlen <= 128);
+
+	octets = 1 + 16 - prefixlen / 8;
+	RETERR(mem_tobuffer(target, sr.base, octets));
+	isc_region_consume(&sr, octets);
+
+	if (prefixlen == 0)
+		return (DNS_R_SUCCESS);
+
+	dns_name_init(&name, NULL);
+	dns_name_fromregion(&name, &sr);
+	return (dns_name_towire(&name, cctx, target));
+}
+
+static int
+compare_in_a6(dns_rdata_t *rdata1, dns_rdata_t *rdata2) {
+	int result;
+	unsigned char prefixlen;
+	unsigned char octets;
+	dns_name_t name1;
+	dns_name_t name2;
+	isc_region_t region1;
+	isc_region_t region2;
+	
+	REQUIRE(rdata1->type == rdata2->type);
+	REQUIRE(rdata1->class == rdata2->class);
+	REQUIRE(rdata1->type == 38);
+	REQUIRE(rdata1->class == 1);
+
+	dns_rdata_toregion(rdata1, &region1);
+	dns_rdata_toregion(rdata2, &region2);
+	prefixlen = MAX(region1.base[0], region2.base[0]);
+	octets = 1 + 16 - prefixlen / 8;
+
+	result = memcmp(region1.base, region2.base, octets);
+	if (result != 0)
+		result = (result < 0) ? -1 : 1;
+
+	isc_region_consume(&region1, octets);
+	isc_region_consume(&region2, octets);
+
+	dns_name_init(&name1, NULL);
+	dns_name_init(&name2, NULL);
+	dns_name_fromregion(&name1, &region1);
+	dns_name_fromregion(&name2, &region2);
+	return (dns_name_compare(&name1, &name2));
+}
+
+static dns_result_t
+fromstruct_in_a6(dns_rdataclass_t class, dns_rdatatype_t type, void *source,
+	     isc_buffer_t *target) {
+
+	REQUIRE(type == 1);
+	REQUIRE(class == 1);
+
+	source = source;
+	target = target;
+
+	return (DNS_R_NOTIMPLEMENTED);
+}
+
+static dns_result_t
+tostruct_in_a6(dns_rdata_t *rdata, void *target) {
+
+	REQUIRE(rdata->type == 38);
+	REQUIRE(rdata->class == 1);
+
+	target = target;
+
+	return (DNS_R_NOTIMPLEMENTED);
+}
+#endif	/* RDATA_IN_1_A6_38_H */