Sergey Pastor
Webserver+3d print
Diff: cyclone_tcp/dns/dns_common.h
- Revision:
- 0:8918a71cdbe9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cyclone_tcp/dns/dns_common.h Sat Feb 04 18:15:49 2017 +0000
@@ -0,0 +1,240 @@
+/**
+ * @file dns_common.h
+ * @brief Common DNS routines
+ *
+ * @section License
+ *
+ * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
+ *
+ * This file is part of CycloneTCP Open.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * @author Oryx Embedded SARL (www.oryx-embedded.com)
+ * @version 1.7.6
+ **/
+
+#ifndef _DNS_COMMON_H
+#define _DNS_COMMON_H
+
+//Dependencies
+#include "core/net.h"
+
+//Maximum recursion limit when parsing domain names
+#ifndef DNS_NAME_MAX_RECURSION
+ #define DNS_NAME_MAX_RECURSION 4
+#elif (DNS_NAME_MAX_RECURSION < 1 || DNS_NAME_MAX_RECURSION > 8)
+ #error DNS_NAME_MAX_RECURSION parameter is not valid
+#endif
+
+//Maximum size of DNS messages
+#define DNS_MESSAGE_MAX_SIZE 512
+//Maximum size of names
+#define DNS_NAME_MAX_SIZE 255
+//Maximum size of labels
+#define DNS_LABEL_MAX_SIZE 63
+
+//Maximum length of reverse DNS names (IPv4)
+#define DNS_MAX_IPV4_REVERSE_NAME_LEN 15
+//Maximum length of reverse DNS names (IPv6)
+#define DNS_MAX_IPV6_REVERSE_NAME_LEN 63
+
+//DNS port number
+#define DNS_PORT 53
+
+//Label compression tag
+#define DNS_COMPRESSION_TAG 0xC0
+
+//Macro definition
+#define DNS_GET_QUESTION(message, offset) (DnsQuestion *) ((uint8_t *) (message) + (offset))
+#define DNS_GET_RESOURCE_RECORD(message, offset) (DnsResourceRecord *) ((uint8_t *) (message) + (offset))
+
+#define DNS_SET_NSEC_BITMAP(bitmap, type) bitmap[(type) / 8] |= 0x80 >> ((type) % 8)
+#define DNS_CLR_NSEC_BITMAP(bitmap, type) bitmap[(type) / 8] &= ~(0x80 >> ((type) % 8))
+
+
+/**
+ * @brief DNS opcodes
+ **/
+
+typedef enum
+{
+ DNS_OPCODE_QUERY = 0,
+ DNS_OPCODE_INVERSE_QUERY = 1,
+ DNS_OPCODE_STATUS = 2,
+ DNS_OPCODE_NOTIFY = 4,
+ DNS_OPCODE_UPDATE = 5
+} DnsOpcode;
+
+
+/**
+ * @brief DNS return codes
+ **/
+
+typedef enum
+{
+ DNS_RCODE_NO_ERROR = 0,
+ DNS_RCODE_FORMAT_ERROR = 1,
+ DNS_RCODE_SERVER_FAILURE = 2,
+ DNS_RCODE_NAME_ERROR = 3,
+ DNS_RCODE_NOT_IMPLEMENTED = 4,
+ DNS_RCODE_QUERY_REFUSED = 5
+}DnsReturnCode;
+
+
+/**
+ * @brief DNS resource record classes
+ **/
+
+typedef enum
+{
+ DNS_RR_CLASS_IN = 1, ///<Internet
+ DNS_RR_CLASS_CH = 3, ///<Chaos
+ DNS_RR_CLASS_HS = 4, ///<Hesiod
+ DNS_RR_CLASS_ANY = 255 ///<Any class
+} DnsResourceRecordClass;
+
+
+/**
+ * @brief DNS resource record types
+ **/
+
+typedef enum
+{
+ DNS_RR_TYPE_A = 1, ///<Host address
+ DNS_RR_TYPE_NS = 2, ///<Authoritative name server
+ DNS_RR_TYPE_CNAME = 5, ///<Canonical name for an alias
+ DNS_RR_TYPE_SOA = 6, ///<Start of a zone of authority
+ DNS_RR_TYPE_WKS = 11, ///<Well known service description
+ DNS_RR_TYPE_PTR = 12, ///<Domain name pointer
+ DNS_RR_TYPE_HINFO = 13, ///<Host information
+ DNS_RR_TYPE_MINFO = 14, ///<Mailbox or mail list information
+ DNS_RR_TYPE_MX = 15, ///<Mail exchange
+ DNS_RR_TYPE_TXT = 16, ///<Text strings
+ DNS_RR_TYPE_AAAA = 28, ///<IPv6 address
+ DNS_RR_TYPE_NB = 32, ///<NetBIOS name service
+ DNS_RR_TYPE_SRV = 33, ///<Server selection
+ DNS_RR_TYPE_NAPTR = 35, ///<Naming authority pointer
+ DNS_RR_TYPE_NSEC = 47, ///<NSEC record
+ DNS_RR_TYPE_EUI48 = 108, ///<EUI-48 address
+ DNS_RR_TYPE_EUI64 = 109, ///<EUI-64 address
+ DNS_RR_TYPE_AXFR = 252, ///<Transfer of an entire zone
+ DNS_RR_TYPE_ANY = 255, ///<A request for all records
+ DNS_RR_TYPE_URI = 256 ///<Uniform resource identifier
+} DnsResourceRecordType;
+
+
+//CodeWarrior or Win32 compiler?
+#if defined(__CWCC__) || defined(_WIN32)
+ #pragma pack(push, 1)
+#endif
+
+
+/**
+ * @brief DNS message header
+ **/
+
+typedef __start_packed struct
+{
+ uint16_t id; //0-1
+#ifdef _CPU_BIG_ENDIAN
+ uint16_t qr : 1; //2
+ uint16_t opcode : 4;
+ uint16_t aa : 1;
+ uint16_t tc : 1;
+ uint16_t rd : 1;
+ uint16_t ra : 1; //3
+ uint16_t z : 3;
+ uint16_t rcode : 4;
+#else
+ uint16_t rd : 1; //2
+ uint16_t tc : 1;
+ uint16_t aa : 1;
+ uint16_t opcode : 4;
+ uint16_t qr : 1;
+ uint16_t rcode : 4; //3
+ uint16_t z : 3;
+ uint16_t ra : 1;
+#endif
+ uint16_t qdcount; //4-5
+ uint16_t ancount; //6-7
+ uint16_t nscount; //8-9
+ uint16_t arcount; //10-11
+ uint8_t questions[]; //12
+} __end_packed DnsHeader;
+
+
+/**
+ * @brief Question format
+ **/
+
+typedef __start_packed struct
+{
+ uint16_t qtype;
+ uint16_t qclass;
+} __end_packed DnsQuestion;
+
+
+/**
+ * @brief Resource record format
+ **/
+
+typedef __start_packed struct
+{
+ uint16_t rtype; //0-1
+ uint16_t rclass; //2-3
+ uint32_t ttl; //4-7
+ uint16_t rdlength; //8-9
+ uint8_t rdata[]; //10
+} __end_packed DnsResourceRecord;
+
+
+/**
+ * @brief SRV resource record format
+ **/
+
+typedef __start_packed struct
+{
+ uint16_t rtype; //0-1
+ uint16_t rclass; //2-3
+ uint32_t ttl; //4-7
+ uint16_t rdlength; //8-9
+ uint16_t priority; //10-11
+ uint16_t weight; //12-13
+ uint16_t port; //14-15
+ uint8_t target[]; //16
+} __end_packed DnsSrvResourceRecord;
+
+
+//CodeWarrior or Win32 compiler?
+#if defined(__CWCC__) || defined(_WIN32)
+ #pragma pack(pop)
+#endif
+
+
+//DNS related functions
+size_t dnsEncodeName(const char_t *src, uint8_t *dest);
+
+size_t dnsParseName(const DnsHeader *message,
+ size_t length, size_t pos, char_t *dest, uint_t level);
+
+int_t dnsCompareName(const DnsHeader *message, size_t length,
+ size_t pos, const char_t *name, uint_t level);
+
+int_t dnsCompareEncodedName(const DnsHeader *message1, size_t length1, size_t pos1,
+ const DnsHeader *message2, size_t length2, size_t pos2, uint_t level);
+
+#endif
+