Network Working Group J. Schoenwaelder, Ed. Internet-Draft Jacobs University Intended status: Standards Track May 13, 2009 Expires: November 14, 2009 Common YANG Data Types draft-ietf-netmod-yang-types-03 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on November 14, 2009. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Schoenwaelder Expires November 14, 2009 [Page 1] Internet-Draft YANG-TYPES May 2009 Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Schoenwaelder Expires November 14, 2009 [Page 2] Internet-Draft YANG-TYPES May 2009 Abstract This document introduces a collection of common data types to be used with the YANG data modeling language. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3. Core YANG Derived Types . . . . . . . . . . . . . . . . . . . 7 4. Internet Specific Derived Types . . . . . . . . . . . . . . . 16 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26 6. Security Considerations . . . . . . . . . . . . . . . . . . . 27 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 28 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 29 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 30 9.1. Normative References . . . . . . . . . . . . . . . . . . . 30 9.2. Informative References . . . . . . . . . . . . . . . . . . 30 Appendix A. XSD Translations . . . . . . . . . . . . . . . . . . 33 A.1. XSD of Core YANG Derived Types . . . . . . . . . . . . . . 33 A.2. XSD of Internet Specific Derived Types . . . . . . . . . . 41 Appendix B. RelaxNG Translations . . . . . . . . . . . . . . . . 52 B.1. RelaxNG of Core YANG Derived Types . . . . . . . . . . . . 52 B.2. RelaxNG of Internet Specific Derived Types . . . . . . . . 59 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 68 Schoenwaelder Expires November 14, 2009 [Page 3] Internet-Draft YANG-TYPES May 2009 1. Introduction YANG [YANG] is a data modeling language used to model configuration and state data manipulated by the NETCONF [RFC4741] protocol. The YANG language supports a small set of built-in data types and provides mechanisms to derive other types from the built-in types. This document introduces a collection of common data types derived from the built-in YANG data types. The definitions are organized in several YANG modules. The "ietf-yang-types" module contains generally useful data types. The "ietf-inet-types" module contains definitions that are relevant for the Internet protocol suite. The derived types are generally designed to be applicable for modeling all areas of management information. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, [RFC2119]. Schoenwaelder Expires November 14, 2009 [Page 4] Internet-Draft YANG-TYPES May 2009 2. Overview This section provides a short overview over the types defined in subsequent sections and their equivalent SMIv2 data types. Table 1 list the types defined in the ietf-yang-types YANG module and the corresponding SMIv2 types (if any). ietf-yang-types +-----------------------+--------------------------------+ | Yang type | Equivalent SMIv2 type (module) | +-----------------------+--------------------------------+ | counter32 | Counter32 (SNMPv2-SMI) | | zero-based-counter32 | ZeroBasedCounter32 (RMON2-MIB) | | counter64 | Counter64 (SNMPv2-SMI) | | zero-based-counter64 | ZeroBasedCounter64 (HCNUM-TC) | | gauge32 | Gauge32 (SNMPv2-SMI) | | gauge64 | CounterBasedGauge64 (HCNUM-TC) | | object-identifier | - | | object-identifier-128 | OBJECT IDENTIFIER | | date-and-time | - | | timeticks | TimeTicks (SNMPv2-SMI) | | timestamp | TimeStamp (SNMPv2-TC) | | phys-address | PhysAddress (SNMPv2-TC) | | mac-address | MacAddress (SNMPv2-TC) | | xpath1.0 | - | +-----------------------+--------------------------------+ Table 1 Table 2 list the types defined in the ietf-inet-types YANG module and the corresponding SMIv2 types (if any). Schoenwaelder Expires November 14, 2009 [Page 5] Internet-Draft YANG-TYPES May 2009 inet-yang-types +-----------------+-----------------------------------------------+ | Yang type | Equivalent SMIv2 type (module) | +-----------------+-----------------------------------------------+ | ip-version | - | | dscp | Dscp (DIFFSERV-DSCP-TC) | | ipv6-flow-label | IPv6FlowLabel (IPV6-FLOW-LABEL-MIB) | | port-number | InetPortNumber (INET-ADDRESS-MIB) | | as-number | InetAutonomousSystemNumber (INET-ADDRESS-MIB) | | ip-address | - | | ipv4-address | - | | ipv6-address | - | | ip-prefix | - | | ipv4-prefix | - | | ipv6-prefix | - | | domain-name | - | | host | - | | uri | Uri (URI-TC-MIB) | +-----------------+-----------------------------------------------+ Table 2 Schoenwaelder Expires November 14, 2009 [Page 6] Internet-Draft YANG-TYPES May 2009 3. Core YANG Derived Types module ietf-yang-types { namespace "urn:ietf:params:xml:ns:yang:yang-types"; prefix "yang"; organization "IETF NETMOD (NETCONF Data Modeling Language) Working Group"; contact "WG Web: WG List: WG Chair: David Partain WG Chair: David Kessens Editor: Juergen Schoenwaelder "; description "This module contains a collection of generally useful derived YANG data types. Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. Schoenwaelder Expires November 14, 2009 [Page 7] Internet-Draft YANG-TYPES May 2009 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; // RFC Ed.: replace XXXX with actual RFC number and remove this note revision 2009-05-13 { description "Initial revision, published as RFC XXXX."; } // RFC Ed.: replace XXXX with actual RFC number and remove this note /*** collection of counter and gauge types ***/ typedef counter32 { type uint32; description "The counter32 type represents a non-negative integer which monotonically increases until it reaches a maximum value of 2^32-1 (4294967295 decimal), when it wraps around and starts increasing again from zero. Counters have no defined `initial' value, and thus, a single value of a counter has (in general) no information content. Discontinuities in the monotonically increasing value normally occur at re-initialization of the management system, and at other times as specified in the description of an object instance using this type. If such other times can occur, for example, the creation of an object instance of type counter32 at times other than re-initialization, then a corresponding object should be defined, with an appropriate type, to indicate the last discontinuity. The counter32 type should not be used for configuration Schoenwaelder Expires November 14, 2009 [Page 8] Internet-Draft YANG-TYPES May 2009 objects. A default statement should not be used for attributes with a type value of counter32. This type is in the value set and its semantics equivalent to the Counter32 type of the SMIv2."; reference "RFC 2578: Structure of Management Information Version 2 (SMIv2)"; } typedef zero-based-counter32 { type yang:counter32; default "0"; description "The zero-based-counter32 type represents a counter32 which has the defined `initial' value zero. Objects of this type will be set to zero(0) on creation and will thereafter count appropriate events, wrapping back to zero(0) when the value 2^32 is reached. Provided that an application discovers the new object within the minimum time to wrap it can use the initial value as a delta since it last polled the table of which this object is part. It is important for a management station to be aware of this minimum time and the actual time between polls, and to discard data if the actual time is too long or there is no defined minimum time. This type is in the value set and its semantics equivalent to the ZeroBasedCounter32 textual convention of the SMIv2."; reference "RFC 2021: Remote Network Monitoring Management Information Base Version 2 using SMIv2"; } typedef counter64 { type uint64; description "The counter64 type represents a non-negative integer which monotonically increases until it reaches a maximum value of 2^64-1 (18446744073709551615), when it wraps around and starts increasing again from zero. Counters have no defined `initial' value, and thus, a single value of a counter has (in general) no information content. Discontinuities in the monotonically increasing value normally occur at re-initialization of the management system, and at other times as specified in the Schoenwaelder Expires November 14, 2009 [Page 9] Internet-Draft YANG-TYPES May 2009 description of an object instance using this type. If such other times can occur, for example, the creation of an object instance of type counter64 at times other than re-initialization, then a corresponding object should be defined, with an appropriate type, to indicate the last discontinuity. The counter64 type should not be used for configuration objects. A default statement should not be used for attributes with a type value of counter64. This type is in the value set and its semantics equivalent to the Counter64 type of the SMIv2."; reference "RFC 2578: Structure of Management Information Version 2 (SMIv2)"; } typedef zero-based-counter64 { type yang:counter64; default "0"; description "The zero-based-counter64 type represents a counter64 which has the defined `initial' value zero. Objects of this type will be set to zero(0) on creation and will thereafter count appropriate events, wrapping back to zero(0) when the value 2^64 is reached. Provided that an application discovers the new object within the minimum time to wrap it can use the initial value as a delta since it last polled the table of which this object is part. It is important for a management station to be aware of this minimum time and the actual time between polls, and to discard data if the actual time is too long or there is no defined minimum time. This type is in the value set and its semantics equivalent to the ZeroBasedCounter64 textual convention of the SMIv2."; reference "RFC 2856: Textual Conventions for Additional High Capacity Data Types"; } typedef gauge32 { type uint32; description "The gauge32 type represents a non-negative integer, which may increase or decrease, but shall never exceed a maximum Schoenwaelder Expires November 14, 2009 [Page 10] Internet-Draft YANG-TYPES May 2009 value, nor fall below a minimum value. The maximum value can not be greater than 2^32-1 (4294967295 decimal), and the minimum value can not be smaller than 0. The value of a gauge32 has its maximum value whenever the information being modeled is greater than or equal to its maximum value, and has its minimum value whenever the information being modeled is smaller than or equal to its minimum value. If the information being modeled subsequently decreases below (increases above) the maximum (minimum) value, the gauge32 also decreases (increases). This type is in the value set and its semantics equivalent to the Counter32 type of the SMIv2."; reference "RFC 2578: Structure of Management Information Version 2 (SMIv2)"; } typedef gauge64 { type uint64; description "The gauge64 type represents a non-negative integer, which may increase or decrease, but shall never exceed a maximum value, nor fall below a minimum value. The maximum value can not be greater than 2^64-1 (18446744073709551615), and the minimum value can not be smaller than 0. The value of a gauge64 has its maximum value whenever the information being modeled is greater than or equal to its maximum value, and has its minimum value whenever the information being modeled is smaller than or equal to its minimum value. If the information being modeled subsequently decreases below (increases above) the maximum (minimum) value, the gauge64 also decreases (increases). This type is in the value set and its semantics equivalent to the CounterBasedGauge64 SMIv2 textual convention defined in RFC 2856"; reference "RFC 2856: Textual Conventions for Additional High Capacity Data Types"; } /*** collection of identifier related types ***/ typedef object-identifier { type string { pattern '(([0-1](\.[1-3]?[0-9]))|(2\.(0|([1-9]\d*))))' + '(\.(0|([1-9]\d*)))*'; } Schoenwaelder Expires November 14, 2009 [Page 11] Internet-Draft YANG-TYPES May 2009 description "The object-identifier type represents administratively assigned names in a registration-hierarchical-name tree. Values of this type are denoted as a sequence of numerical non-negative sub-identifier values. Each sub-identifier value MUST NOT exceed 2^32-1 (4294967295). Sub-identifiers are separated by single dots and without any intermediate white space. Although the number of sub-identifiers is not limited, module designers should realize that there may be implementations that stick with the SMIv2 limit of 128 sub-identifiers. This type is a superset of the SMIv2 OBJECT IDENTIFIER type since it is not restricted to 128 sub-identifiers."; reference "ISO/IEC 9834-1: Information technology -- Open Systems Interconnection -- Procedures for the operation of OSI Registration Authorities: General procedures and top arcs of the ASN.1 Object Identifier tree"; } typedef object-identifier-128 { type object-identifier { pattern '\d*(.\d*){1,127}'; } description "This type represents object-identifiers restricted to 128 sub-identifiers. This type is in the value set and its semantics equivalent to the OBJECT IDENTIFIER type of the SMIv2."; reference "RFC 2578: Structure of Management Information Version 2 (SMIv2)"; } /*** collection of date and time related types ***/ typedef date-and-time { type string { pattern '\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d+)?' + '(Z|(\+|-)\d{2}:\d{2})'; } description 'The date-and-time type is a profile of the ISO 8601 standard for representation of dates and times using the Schoenwaelder Expires November 14, 2009 [Page 12] Internet-Draft YANG-TYPES May 2009 Gregorian calendar. The format is most easily described using the following ABFN (see RFC 3339): date-fullyear = 4DIGIT date-month = 2DIGIT ; 01-12 date-mday = 2DIGIT ; 01-28, 01-29, 01-30, 01-31 time-hour = 2DIGIT ; 00-23 time-minute = 2DIGIT ; 00-59 time-second = 2DIGIT ; 00-58, 00-59, 00-60 time-secfrac = "." 1*DIGIT time-numoffset = ("+" / "-") time-hour ":" time-minute time-offset = "Z" / time-numoffset partial-time = time-hour ":" time-minute ":" time-second [time-secfrac] full-date = date-fullyear "-" date-month "-" date-mday full-time = partial-time time-offset date-time = full-date "T" full-time The date-and-time type is consistent with the semantics defined in RFC 3339. The data-and-time type is compatible with the dateTime XML schema type with the following two notable exceptions: (a) The data-and-time type does not allow negative years. (b) The data-and-time time-offset -00:00 indicates an unknown time zone (see RFC 3339) while -00:00 and +00:00 and Z all represent the same time zone in dateTime. This type is not equivalent to the DateAndTime textual convention of the SMIv2 since RFC 3339 uses a different separator between full-date and full-time and provides higher resolution of time-secfrac. The canonical format for date-and-time values mandates the UTC time format with the time-offset is indicated by the letter "Z". This is consistent with the canonical format used by the dateTime XML schema type.'; reference "RFC 3339: Date and Time on the Internet: Timestamps RFC 2579: Textual Conventions for SMIv2 W3C REC-xmlschema-2-20041028: XML Schema Part 2: Datatypes Second Edition"; } typedef timeticks { Schoenwaelder Expires November 14, 2009 [Page 13] Internet-Draft YANG-TYPES May 2009 type uint32; description "The timeticks type represents a non-negative integer which represents the time, modulo 2^32 (4294967296 decimal), in hundredths of a second between two epochs. When objects are defined which use this type, the description of the object identifies both of the reference epochs. This type is in the value set and its semantics equivalent to the TimeTicks type of the SMIv2."; reference "RFC 2578: Structure of Management Information Version 2 (SMIv2)"; } typedef timestamp { type yang:timeticks; description "The timestamp type represents the value of an associated timeticks object at which a specific occurrence happened. The specific occurrence must be defined in the description of any object defined using this type. When the specific occurrence occurred prior to the last time the associated timeticks attribute was zero, then the timestamp value is zero. Note that this requires all timestamp values to be reset to zero when the value of the associated timeticks attribute reaches 497+ days and wraps around to zero. The associated timeticks object must be specified in the description of any object using this type. This type is in the value set and its semantics equivalent to the TimeStamp textual convention of the SMIv2."; reference "RFC 2579: Textual Conventions for SMIv2"; } /*** collection of generic address types ***/ typedef phys-address { type string { pattern '([0-9a0-fA-F]{2}(:[0-9a0-fA-F]{2})*)?'; } description "Represents media- or physical-level addresses represented as a sequence octets, each octet represented by two hexadecimal numbers. Octets are separated by colons. This type is in the value set and its semantics equivalent Schoenwaelder Expires November 14, 2009 [Page 14] Internet-Draft YANG-TYPES May 2009 to the PhysAddress textual convention of the SMIv2."; reference "RFC 2579: Textual Conventions for SMIv2"; } typedef mac-address { type string { pattern '[0-9a-fA-F]{2}(:[0-9a-fA-F]{2}){5}'; } description "The mac-address type represents an 802 MAC address represented in the `canonical' order defined by IEEE 802.1a, i.e., as if it were transmitted least significant bit first, even though 802.5 (in contrast to other 802.x protocols) requires MAC addresses to be transmitted most significant bit first. This type is in the value set and its semantics equivalent to the MacAddress textual convention of the SMIv2."; reference "RFC 2579: Textual Conventions for SMIv2"; } /*** collection of XML specific types ***/ typedef xpath1.0 { type string; description "This type represents an XPATH 1.0 expression."; reference "W3C REC-xpath-19991116: XML Path Language (XPath) Version 1.0"; } } Schoenwaelder Expires November 14, 2009 [Page 15] Internet-Draft YANG-TYPES May 2009 4. Internet Specific Derived Types module ietf-inet-types { namespace "urn:ietf:params:xml:ns:yang:inet-types"; prefix "inet"; organization "IETF NETMOD (NETCONF Data Modeling Language) Working Group"; contact "WG Web: WG List: WG Chair: David Partain WG Chair: David Kessens Editor: Juergen Schoenwaelder "; description "This module contains a collection of generally useful derived YANG data types for Internet addresses and related things. Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. Schoenwaelder Expires November 14, 2009 [Page 16] Internet-Draft YANG-TYPES May 2009 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; // RFC Ed.: replace XXXX with actual RFC number and remove this note revision 2009-05-13 { description "Initial revision, published as RFC XXXX."; } // RFC Ed.: replace XXXX with actual RFC number and remove this note /*** collection of protocol field related types ***/ typedef ip-version { type enumeration { enum unknown { value "0"; description "An unknown or unspecified version of the Internet protocol."; } enum ipv4 { value "1"; description "The IPv4 protocol as defined in RFC 791."; } enum ipv6 { value "2"; description "The IPv6 protocol as defined in RFC 2460."; } } description "This value represents the version of the IP protocol. Schoenwaelder Expires November 14, 2009 [Page 17] Internet-Draft YANG-TYPES May 2009 This type is in the value set and its semantics equivalent to the InetVersion textual convention of the SMIv2. However, the lexical appearance is different from the InetVersion textual convention."; reference "RFC 791: Internet Protocol RFC 2460: Internet Protocol, Version 6 (IPv6) Specification RFC 4001: Textual Conventions for Internet Network Addresses"; } typedef dscp { type uint8 { range "0..63"; } description "The dscp type represents a Differentiated Services Code-Point that may be used for marking packets in a traffic stream. This type is in the value set and its semantics equivalent to the Dscp textual convention of the SMIv2."; reference "RFC 3289: Management Information Base for the Differentiated Services Architecture RFC 2474: Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers RFC 2780: IANA Allocation Guidelines For Values In the Internet Protocol and Related Headers"; } typedef ipv6-flow-label { type uint32 { range "0..1048575"; } description "The flow-label type represents flow identifier or Flow Label in an IPv6 packet header that may be used to discriminate traffic flows. This type is in the value set and its semantics equivalent to the IPv6FlowLabel textual convention of the SMIv2."; reference "RFC 3595: Textual Conventions for IPv6 Flow Label RFC 2460: Internet Protocol, Version 6 (IPv6) Specification"; } typedef port-number { type uint16 { range "1..65535"; Schoenwaelder Expires November 14, 2009 [Page 18] Internet-Draft YANG-TYPES May 2009 } description "The port-number type represents a 16-bit port number of an Internet transport layer protocol such as UDP, TCP, DCCP or SCTP. Port numbers are assigned by IANA. A current list of all assignments is available from . Note that the value zero is not a valid port number. A union type might be used in situations where the value zero is meaningful. This type is in the value set and its semantics equivalent to the InetPortNumber textual convention of the SMIv2."; reference "RFC 768: User Datagram Protocol RFC 793: Transmission Control Protocol RFC 2960: Stream Control Transmission Protocol RFC 4340: Datagram Congestion Control Protocol (DCCP) RFC 4001: Textual Conventions for Internet Network Addresses"; } /*** collection of autonomous system related types ***/ typedef as-number { type uint32; description "The as-number type represents autonomous system numbers which identify an Autonomous System (AS). An AS is a set of routers under a single technical administration, using an interior gateway protocol and common metrics to route packets within the AS, and using an exterior gateway protocol to route packets to other ASs'. IANA maintains the AS number space and has delegated large parts to the regional registries. Autonomous system numbers were originally limited to 16 bits. BGP extensions have enlarged the autonomous system number space to 32 bits. This type therefore uses an uint32 base type without a range restriction in order to support a larger autonomous system number space. This type is in the value set and its semantics equivalent to the InetAutonomousSystemNumber textual convention of the SMIv2."; reference "RFC 1930: Guidelines for creation, selection, and registration of an Autonomous System (AS) RFC 4271: A Border Gateway Protocol 4 (BGP-4) Schoenwaelder Expires November 14, 2009 [Page 19] Internet-Draft YANG-TYPES May 2009 RFC 4893: BGP Support for Four-octet AS Number Space RFC 4001: Textual Conventions for Internet Network Addresses"; } /*** collection of IP address and hostname related types ***/ typedef ip-address { type union { type inet:ipv4-address; type inet:ipv6-address; } description "The ip-address type represents an IP address and is IP version neutral. The format of the textual representations implies the IP version."; } typedef ipv4-address { type string { pattern '((0' + '|(1[0-9]{0,2})' + '|(2(([0-4][0-9]?)|(5[0-5]?)|([6-9]?)))' + '|([3-9][0-9]?)' + ')' + '\.){3}' + '(0' + '|(1[0-9]{0,2})' + '|(2(([0-4][0-9]?)|(5[0-5]?)|([6-9]?)))' + '|([3-9][0-9]?)' + ')(%[\p{N}\p{L}]+)?'; } description "The ipv4-address type represents an IPv4 address in dotted-quad notation. The IPv4 address may include a zone index, separated by a % sign. The zone index is used to disambiguate identical address values. For link-local addresses, the zone index will typically be the interface index number or the name of an interface. If the zone index is not present, the default zone of the device will be used. The canonical format for the zone index is the numerical format"; } typedef ipv6-address { type string { Schoenwaelder Expires November 14, 2009 [Page 20] Internet-Draft YANG-TYPES May 2009 pattern '((:|[0-9a-fA-F]{0,4}):)([0-9a-fA-F]{0,4}:){0,5}' + '((([0-9a-fA-F]{0,4}:)?(:|[0-9a-fA-F]{0,4}))|' + '(((25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\.){3}' + '(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])))' + '(%[\p{N}\p{L}]+)?'; pattern '(([^:]+:){6}(([^:]+:[^:]+)|(.*\..*)))|' + '((([^:]+:)*[^:]+)?::(([^:]+:)*[^:]+)?)' + '(%.+)?'; } description "The ipv6-address type represents an IPv6 address in full, mixed, shortened and shortened mixed notation. The IPv6 address may include a zone index, separated by a % sign. The zone index is used to disambiguate identical address values. For link-local addresses, the zone index will typically be the interface index number or the name of an interface. If the zone index is not present, the default zone of the device will be used. The canonical format of IPv6 addresses uses the compressed format described in RFC 4291 section 2.2 item 2 with the following additional rules: The :: substitution must be applied to the longest sequence of all-zero 16-bit chunks in an IPv6 address. If there is a tie, the first sequence of all-zero 16-bit chunks is replaced by ::. Single all-zero 16-bit chunks are not compressed. The normalized format uses lower-case characters and leading zeros are not allowed. The canonical format for the zone index is the numerical format as described in RFC 4007 section 11.2."; reference "RFC 4291: IP Version 6 Addressing Architecture RFC 4007: IPv6 Scoped Address Architecture"; } typedef ip-prefix { type union { type inet:ipv4-prefix; type inet:ipv6-prefix; } description "The ip-prefix type represents an IP prefix and is IP version neutral. The format of the textual representations implies the IP version."; } typedef ipv4-prefix { Schoenwaelder Expires November 14, 2009 [Page 21] Internet-Draft YANG-TYPES May 2009 type string { pattern '(([0-1]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.){3}' + '([0-1]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])' + '/(([0-9])|([1-2][0-9])|(3[0-2]))'; } description "The ipv4-prefix type represents an IPv4 address prefix. The prefix length is given by the number following the slash character and must be less than or equal to 32. A prefix length value of n corresponds to an IP address mask which has n contiguous 1-bits from the most significant bit (MSB) and all other bits set to 0. The canonical format of an IPv4 prefix has all bits of the IPv4 address set to zero that are not part of the IPv4 prefix."; } typedef ipv6-prefix { type string { pattern '((:|[0-9a-fA-F]{0,4}):)([0-9a-fA-F]{0,4}:){0,5}' + '((([0-9a-fA-F]{0,4}:)?(:|[0-9a-fA-F]{0,4}))|' + '(((25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\.){3}' + '(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])))' + '(/(([0-9])|([0-9]{2})|(1[0-1][0-9])|(12[0-8])))'; pattern '(([^:]+:){6}(([^:]+:[^:]+)|(.*\..*)))|' + '((([^:]+:)*[^:]+)?::(([^:]+:)*[^:]+)?)' + '(/.+)'; } description "The ipv6-prefix type represents an IPv6 address prefix. The prefix length is given by the number following the slash character and must be less than or equal 128. A prefix length value of n corresponds to an IP address mask which has n contiguous 1-bits from the most significant bit (MSB) and all other bits set to 0. The IPv6 address should have all bits that do not belong to the prefix set to zero. The canonical format of an IPv6 prefix has all bits of the IPv6 address set to zero that are not part of the IPv6 prefix. Furthermore, IPv6 address is represented in the compressed format described in RFC 4291 section 2.2 item 2 with the following additional rules: The :: substitution must be applied to the longest sequence of Schoenwaelder Expires November 14, 2009 [Page 22] Internet-Draft YANG-TYPES May 2009 all-zero 16-bit chunks in an IPv6 address. If there is a tie, the first sequence of all-zero 16-bit chunks is replaced by ::. Single all-zero 16-bit chunks are not compressed. The normalized format uses lower-case characters and leading zeros are not allowed."; reference "RFC 4291: IP Version 6 Addressing Architecture"; } /*** collection of domain name and URI types ***/ typedef domain-name { type string { pattern '((([a-zA-Z0-9_]([a-zA-Z0-9\-_]){0,61})?[a-zA-Z0-9]\.)*' + '([a-zA-Z0-9_]([a-zA-Z0-9\-_]){0,61})?[a-zA-Z0-9]\.?)' + '|\.'; length "1..253"; } description "The domain-name type represents a DNS domain name. The name SHOULD be fully qualified whenever possible. Internet domain names are only loosely specified. Section 3.5 of RFC 1034 recommends a syntax (modified in section 2.1 of RFC 1123). The pattern above is intended to allow for current practise in domain name use, and some possible future expansion. It is designed to hold various types of domain names, including names used for A or AAAA records (host names) and other records, such as SRV records. Note that Internet host names have a stricter syntax (described in RFC 952) than the DNS recommendations in RFCs 1034 and 1123, and that systems that want to store host names in objects using the domain-name type are recommended to adhere to this stricter standard to ensure interoperability. The encoding of DNS names in the DNS protocol is limited to 255 characters. Since the encoding consists of labels prefixed by a length bytes and there is a trailing NULL byte, only 253 characters can appear in the textual dotted notation. The description clause of objects using the domain-name type MUST describe how (and when) these names are resolved to IP addresses. Note that the resolution of a domain-name value may require to query multiple DNS records (e.g., A for IPv4 and AAAA for IPv6). The order of the resolution process and which DNS record takes precedence depends on the configuration of the resolver. Schoenwaelder Expires November 14, 2009 [Page 23] Internet-Draft YANG-TYPES May 2009 The canonical format for domain-name values uses the US-ASCII encoding and case-insensitive characters are set to lowercase."; reference "RFC 952: DoD Internet Host Table Specification RFC 1034: Domain Names - Concepts and Facilities RFC 1123: Requirements for Internet Hosts -- Application and Support RFC 3490: Internationalizing Domain Names in Applications (IDNA)"; } typedef host { type union { type inet:ip-address; type inet:domain-name; } description "The host type represents either an IP address or a DNS domain name."; } typedef uri { type string; description "The uri type represents a Uniform Resource Identifier (URI) as defined by STD 66. Objects using the uri type must be in US-ASCII encoding, and MUST be normalized as described by RFC 3986 Sections 6.2.1, 6.2.2.1, and 6.2.2.2. All unnecessary percent-encoding is removed, and all case-insensitive characters are set to lowercase except for hexadecimal digits, which are normalized to uppercase as described in Section 6.2.2.1. The purpose of this normalization is to help provide unique URIs. Note that this normalization is not sufficient to provide uniqueness. Two URIs that are textually distinct after this normalization may still be equivalent. Objects using the uri type may restrict the schemes that they permit. For example, 'data:' and 'urn:' schemes might not be appropriate. A zero-length URI is not a valid URI. This can be used to express 'URI absent' where required Schoenwaelder Expires November 14, 2009 [Page 24] Internet-Draft YANG-TYPES May 2009 This type is in the value set and its semantics equivalent to the Uri SMIv2 textual convention defined in RFC 5017."; reference "RFC 3986: Uniform Resource Identifier (URI): Generic Syntax RFC 3305: Report from the Joint W3C/IETF URI Planning Interest Group: Uniform Resource Identifiers (URIs), URLs, and Uniform Resource Names (URNs): Clarifications and Recommendations RFC 5017: MIB Textual Conventions for Uniform Resource Identifiers (URIs)"; } } Schoenwaelder Expires November 14, 2009 [Page 25] Internet-Draft YANG-TYPES May 2009 5. IANA Considerations A registry for standard YANG modules shall be set up. The name of the registry is "IETF YANG Modules" and the registry shall record for each entry the unique name of a YANG module, the assigned XML namespace from the YANG URI Scheme, and a reference to the module's documentation (typically and RFC). Allocations require IETF Review as defined in [RFC5226]. The initial assignments are: YANG Module XML namespace Reference ----------- -------------------------------------- --------- ietf-yang-types urn:ietf:params:xml:ns:yang:yang-types RFC XXXX ietf-inet-types urn:ietf:params:xml:ns:yang:inet-types RFC XXXX RFC Ed.: replace XXXX with actual RFC number and remove this note This document registers three URIs in the IETF XML registry [RFC3688]. Following the format in RFC 3688, the following registration is requested. URI: urn:ietf:params:xml:ns:yang:yang-types URI: urn:ietf:params:xml:ns:yang:inet-types Registrant Contact: The NETMOD WG of the IETF. XML: N/A, the requested URI is an XML namespace. Schoenwaelder Expires November 14, 2009 [Page 26] Internet-Draft YANG-TYPES May 2009 6. Security Considerations This document defines common data types using the YANG data modeling language. The definitions themselves have no security impact on the Internet but the usage of these definitions in concrete YANG modules might have. The security considerations spelled out in the YANG specification [YANG] apply for this document as well. Schoenwaelder Expires November 14, 2009 [Page 27] Internet-Draft YANG-TYPES May 2009 7. Contributors The following people all contributed significantly to the initial version of this draft: - Andy Bierman (andybierman.com) - Martin Bjorklund (Tail-f Systems) - Balazs Lengyel (Ericsson) - David Partain (Ericsson) - Phil Shafer (Juniper Networks) Schoenwaelder Expires November 14, 2009 [Page 28] Internet-Draft YANG-TYPES May 2009 8. Acknowledgments The editor wishes to thank the following individuals for providing helpful comments on various versions of this document: Ladislav Lhotka, Lars-Johan Liman. Schoenwaelder Expires November 14, 2009 [Page 29] Internet-Draft YANG-TYPES May 2009 9. References 9.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January 2004. [YANG] Bjorklund, M., Ed., "YANG - A data modeling language for NETCONF", draft-ietf-netmod-yang-05 (work in progress). 9.2. Informative References [RFC0768] Postel, J., "User Datagram Protocol", STD 6, RFC 768, August 1980. [RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791, September 1981. [RFC0793] Postel, J., "Transmission Control Protocol", STD 7, RFC 793, September 1981. [RFC0952] Harrenstien, K., Stahl, M., and E. Feinler, "DoD Internet host table specification", RFC 952, October 1985. [RFC1034] Mockapetris, P., "Domain names - concepts and facilities", STD 13, RFC 1034, November 1987. [RFC1123] Braden, R., "Requirements for Internet Hosts - Application and Support", STD 3, RFC 1123, October 1989. [RFC1930] Hawkinson, J. and T. Bates, "Guidelines for creation, selection, and registration of an Autonomous System (AS)", BCP 6, RFC 1930, March 1996. [RFC2021] Waldbusser, S., "Remote Network Monitoring Management Information Base Version 2 using SMIv2", RFC 2021, January 1997. [RFC2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6 (IPv6) Specification", RFC 2460, December 1998. [RFC2474] Nichols, K., Blake, S., Baker, F., and D. Black, "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers", RFC 2474, December 1998. Schoenwaelder Expires November 14, 2009 [Page 30] Internet-Draft YANG-TYPES May 2009 [RFC2578] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [RFC2579] McCloghrie, K., Ed., Perkins, D., Ed., and J. Schoenwaelder, Ed., "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [RFC2780] Bradner, S. and V. Paxson, "IANA Allocation Guidelines For Values In the Internet Protocol and Related Headers", BCP 37, RFC 2780, March 2000. [RFC2856] Bierman, A., McCloghrie, K., and R. Presuhn, "Textual Conventions for Additional High Capacity Data Types", RFC 2856, June 2000. [RFC2960] Stewart, R., Xie, Q., Morneault, K., Sharp, C., Schwarzbauer, H., Taylor, T., Rytina, I., Kalla, M., Zhang, L., and V. Paxson, "Stream Control Transmission Protocol", RFC 2960, October 2000. [RFC3289] Baker, F., Chan, K., and A. Smith, "Management Information Base for the Differentiated Services Architecture", RFC 3289, May 2002. [RFC3305] Mealling, M. and R. Denenberg, "Report from the Joint W3C/ IETF URI Planning Interest Group: Uniform Resource Identifiers (URIs), URLs, and Uniform Resource Names (URNs): Clarifications and Recommendations", RFC 3305, August 2002. [RFC3339] Klyne, G., Ed. and C. Newman, "Date and Time on the Internet: Timestamps", RFC 3339, July 2002. [RFC3490] Faltstrom, P., Hoffman, P., and A. Costello, "Internationalizing Domain Names in Applications (IDNA)", RFC 3490, March 2003. [RFC3595] Wijnen, B., "Textual Conventions for IPv6 Flow Label", RFC 3595, September 2003. [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, January 2005. [RFC4001] Daniele, M., Haberman, B., Routhier, S., and J. Schoenwaelder, "Textual Conventions for Internet Network Addresses", RFC 4001, February 2005. Schoenwaelder Expires November 14, 2009 [Page 31] Internet-Draft YANG-TYPES May 2009 [RFC4007] Deering, S., Haberman, B., Jinmei, T., Nordmark, E., and B. Zill, "IPv6 Scoped Address Architecture", RFC 4007, March 2005. [RFC4271] Rekhter, Y., Li, T., and S. Hares, "A Border Gateway Protocol 4 (BGP-4)", RFC 4271, January 2006. [RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing Architecture", RFC 4291, February 2006. [RFC4340] Kohler, E., Handley, M., and S. Floyd, "Datagram Congestion Control Protocol (DCCP)", RFC 4340, March 2006. [RFC4741] Enns, R., "NETCONF Configuration Protocol", RFC 4741, December 2006. [RFC4893] Vohra, Q. and E. Chen, "BGP Support for Four-octet AS Number Space", RFC 4893, May 2007. [RFC5017] McWalter, D., "MIB Textual Conventions for Uniform Resource Identifiers (URIs)", RFC 5017, September 2007. [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, May 2008. Schoenwaelder Expires November 14, 2009 [Page 32] Internet-Draft YANG-TYPES May 2009 Appendix A. XSD Translations This appendix provides XML Schema (XSD) translations of the types defined in this document. This appendix is informative and not normative. A.1. XSD of Core YANG Derived Types This module contains a collection of generally useful derived YANG data types. Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR Schoenwaelder Expires November 14, 2009 [Page 33] Internet-Draft YANG-TYPES May 2009 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices. The counter32 type represents a non-negative integer which monotonically increases until it reaches a maximum value of 2^32-1 (4294967295 decimal), when it wraps around and starts increasing again from zero. Counters have no defined `initial' value, and thus, a single value of a counter has (in general) no information content. Discontinuities in the monotonically increasing value normally occur at re-initialization of the management system, and at other times as specified in the description of an object instance using this type. If such other times can occur, for example, the creation of an object instance of type counter32 at times other than re-initialization, then a corresponding object should be defined, with an appropriate type, to indicate the last discontinuity. The counter32 type should not be used for configuration objects. A default statement should not be used for attributes with a type value of counter32. This type is in the value set and its semantics equivalent to the Counter32 type of the SMIv2. Schoenwaelder Expires November 14, 2009 [Page 34] Internet-Draft YANG-TYPES May 2009 The zero-based-counter32 type represents a counter32 which has the defined `initial' value zero. Objects of this type will be set to zero(0) on creation and will thereafter count appropriate events, wrapping back to zero(0) when the value 2^32 is reached. Provided that an application discovers the new object within the minimum time to wrap it can use the initial value as a delta since it last polled the table of which this object is part. It is important for a management station to be aware of this minimum time and the actual time between polls, and to discard data if the actual time is too long or there is no defined minimum time. This type is in the value set and its semantics equivalent to the ZeroBasedCounter32 textual convention of the SMIv2. The counter64 type represents a non-negative integer which monotonically increases until it reaches a maximum value of 2^64-1 (18446744073709551615), when it wraps around and starts increasing again from zero. Counters have no defined `initial' value, and thus, a single value of a counter has (in general) no information content. Discontinuities in the monotonically increasing value normally occur at re-initialization of the management system, and at other times as specified in the description of an object instance using this type. If such other times can occur, for example, the creation of an object instance of type counter64 at times other than re-initialization, then a corresponding object should be defined, with an appropriate type, to indicate the last Schoenwaelder Expires November 14, 2009 [Page 35] Internet-Draft YANG-TYPES May 2009 discontinuity. The counter64 type should not be used for configuration objects. A default statement should not be used for attributes with a type value of counter64. This type is in the value set and its semantics equivalent to the Counter64 type of the SMIv2. The zero-based-counter64 type represents a counter64 which has the defined `initial' value zero. Objects of this type will be set to zero(0) on creation and will thereafter count appropriate events, wrapping back to zero(0) when the value 2^64 is reached. Provided that an application discovers the new object within the minimum time to wrap it can use the initial value as a delta since it last polled the table of which this object is part. It is important for a management station to be aware of this minimum time and the actual time between polls, and to discard data if the actual time is too long or there is no defined minimum time. This type is in the value set and its semantics equivalent to the ZeroBasedCounter64 textual convention of the SMIv2. The gauge32 type represents a non-negative integer, which may increase or decrease, but shall never exceed a maximum value, nor fall below a minimum value. The maximum value Schoenwaelder Expires November 14, 2009 [Page 36] Internet-Draft YANG-TYPES May 2009 can not be greater than 2^32-1 (4294967295 decimal), and the minimum value can not be smaller than 0. The value of a gauge32 has its maximum value whenever the information being modeled is greater than or equal to its maximum value, and has its minimum value whenever the information being modeled is smaller than or equal to its minimum value. If the information being modeled subsequently decreases below (increases above) the maximum (minimum) value, the gauge32 also decreases (increases). This type is in the value set and its semantics equivalent to the Counter32 type of the SMIv2. The gauge64 type represents a non-negative integer, which may increase or decrease, but shall never exceed a maximum value, nor fall below a minimum value. The maximum value can not be greater than 2^64-1 (18446744073709551615), and the minimum value can not be smaller than 0. The value of a gauge64 has its maximum value whenever the information being modeled is greater than or equal to its maximum value, and has its minimum value whenever the information being modeled is smaller than or equal to its minimum value. If the information being modeled subsequently decreases below (increases above) the maximum (minimum) value, the gauge64 also decreases (increases). This type is in the value set and its semantics equivalent to the CounterBasedGauge64 SMIv2 textual convention defined in RFC 2856 Schoenwaelder Expires November 14, 2009 [Page 37] Internet-Draft YANG-TYPES May 2009 The object-identifier type represents administratively assigned names in a registration-hierarchical-name tree. Values of this type are denoted as a sequence of numerical non-negative sub-identifier values. Each sub-identifier value MUST NOT exceed 2^32-1 (4294967295). Sub-identifiers are separated by single dots and without any intermediate white space. Although the number of sub-identifiers is not limited, module designers should realize that there may be implementations that stick with the SMIv2 limit of 128 sub-identifiers. This type is a superset of the SMIv2 OBJECT IDENTIFIER type since it is not restricted to 128 sub-identifiers. This type represents object-identifiers restricted to 128 sub-identifiers. This type is in the value set and its semantics equivalent to the OBJECT IDENTIFIER type of the SMIv2. The date-and-time type is a profile of the ISO 8601 standard for representation of dates and times using the Gregorian calendar. The format is most easily described using the following ABFN (see RFC 3339): Schoenwaelder Expires November 14, 2009 [Page 38] Internet-Draft YANG-TYPES May 2009 date-fullyear = 4DIGIT date-month = 2DIGIT ; 01-12 date-mday = 2DIGIT ; 01-28, 01-29, 01-30, 01-31 time-hour = 2DIGIT ; 00-23 time-minute = 2DIGIT ; 00-59 time-second = 2DIGIT ; 00-58, 00-59, 00-60 time-secfrac = "." 1*DIGIT time-numoffset = ("+" / "-") time-hour ":" time-minute time-offset = "Z" / time-numoffset partial-time = time-hour ":" time-minute ":" time-second [time-secfrac] full-date = date-fullyear "-" date-month "-" date-mday full-time = partial-time time-offset date-time = full-date "T" full-time The date-and-time type is consistent with the semantics defined in RFC 3339. The data-and-time type is compatible with the dateTime XML schema type with the following two notable exceptions: (a) The data-and-time type does not allow negative years. (b) The data-and-time time-offset -00:00 indicates an unknown time zone (see RFC 3339) while -00:00 and +00:00 and Z all represent the same time zone in dateTime. This type is not equivalent to the DateAndTime textual convention of the SMIv2 since RFC 3339 uses a different separator between full-date and full-time and provides higher resolution of time-secfrac. The canonical format for date-and-time values mandates the UTC time format with the time-offset is indicated by the letter "Z". This is consistent with the canonical format used by the dateTime XML schema type. Schoenwaelder Expires November 14, 2009 [Page 39] Internet-Draft YANG-TYPES May 2009 The timeticks type represents a non-negative integer which represents the time, modulo 2^32 (4294967296 decimal), in hundredths of a second between two epochs. When objects are defined which use this type, the description of the object identifies both of the reference epochs. This type is in the value set and its semantics equivalent to the TimeTicks type of the SMIv2. The timestamp type represents the value of an associated timeticks object at which a specific occurrence happened. The specific occurrence must be defined in the description of any object defined using this type. When the specific occurrence occurred prior to the last time the associated timeticks attribute was zero, then the timestamp value is zero. Note that this requires all timestamp values to be reset to zero when the value of the associated timeticks attribute reaches 497+ days and wraps around to zero. The associated timeticks object must be specified in the description of any object using this type. This type is in the value set and its semantics equivalent to the TimeStamp textual convention of the SMIv2. Represents media- or physical-level addresses represented as a sequence octets, each octet represented by two hexadecimal numbers. Octets are separated by colons. Schoenwaelder Expires November 14, 2009 [Page 40] Internet-Draft YANG-TYPES May 2009 This type is in the value set and its semantics equivalent to the PhysAddress textual convention of the SMIv2. The mac-address type represents an 802 MAC address represented in the `canonical' order defined by IEEE 802.1a, i.e., as if it were transmitted least significant bit first, even though 802.5 (in contrast to other 802.x protocols) requires MAC addresses to be transmitted most significant bit first. This type is in the value set and its semantics equivalent to the MacAddress textual convention of the SMIv2. This type represents an XPATH 1.0 expression. A.2. XSD of Internet Specific Derived Types This module contains a collection of generally useful derived YANG data types for Internet addresses and related things. Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of Internet Society, IETF or IETF Trust, nor the names of specific contributors, may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Schoenwaelder Expires November 14, 2009 [Page 42] Internet-Draft YANG-TYPES May 2009 This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices. This value represents the version of the IP protocol. This type is in the value set and its semantics equivalent to the InetVersion textual convention of the SMIv2. However, the lexical appearance is different from the InetVersion textual convention. The dscp type represents a Differentiated Services Code-Point that may be used for marking packets in a traffic stream. This type is in the value set and its semantics equivalent to the Dscp textual convention of the SMIv2. The flow-label type represents flow identifier or Flow Label in an IPv6 packet header that may be used to discriminate Schoenwaelder Expires November 14, 2009 [Page 43] Internet-Draft YANG-TYPES May 2009 traffic flows. This type is in the value set and its semantics equivalent to the IPv6FlowLabel textual convention of the SMIv2. The port-number type represents a 16-bit port number of an Internet transport layer protocol such as UDP, TCP, DCCP or SCTP. Port numbers are assigned by IANA. A current list of all assignments is available from <http://www.iana.org/>. Note that the value zero is not a valid port number. A union type might be used in situations where the value zero is meaningful. This type is in the value set and its semantics equivalent to the InetPortNumber textual convention of the SMIv2. The as-number type represents autonomous system numbers which identify an Autonomous System (AS). An AS is a set of routers under a single technical administration, using an interior gateway protocol and common metrics to route packets within the AS, and using an exterior gateway protocol to route packets to other ASs'. IANA maintains the AS number space and has delegated large parts to the regional registries. Schoenwaelder Expires November 14, 2009 [Page 44] Internet-Draft YANG-TYPES May 2009 Autonomous system numbers were originally limited to 16 bits. BGP extensions have enlarged the autonomous system number space to 32 bits. This type therefore uses an uint32 base type without a range restriction in order to support a larger autonomous system number space. This type is in the value set and its semantics equivalent to the InetAutonomousSystemNumber textual convention of the SMIv2. The ip-address type represents an IP address and is IP version neutral. The format of the textual representations implies the IP version. The ipv4-address type represents an IPv4 address in dotted-quad notation. The IPv4 address may include a zone index, separated by a % sign. The zone index is used to disambiguate identical address values. For link-local addresses, the zone index will typically be the interface index number or the name of an interface. If the zone index is not present, the default Schoenwaelder Expires November 14, 2009 [Page 45] Internet-Draft YANG-TYPES May 2009 zone of the device will be used. The canonical format for the zone index is the numerical format The ipv6-address type represents an IPv6 address in full, mixed, shortened and shortened mixed notation. The IPv6 address may include a zone index, separated by a % sign. The zone index is used to disambiguate identical address values. For link-local addresses, the zone index will typically be the interface index number or the name of an interface. If the zone index is not present, the default zone of the device will be used. The canonical format of IPv6 addresses uses the compressed format described in RFC 4291 section 2.2 item 2 with the following additional rules: The :: substitution must be applied to the longest sequence of all-zero 16-bit chunks in an IPv6 address. If there is a tie, the first sequence of all-zero 16-bit chunks is replaced by ::. Single all-zero 16-bit chunks are not compressed. The normalized format uses lower-case characters and leading zeros are not allowed. The canonical format for the zone index is the numerical format as described in RFC 4007 section 11.2. Schoenwaelder Expires November 14, 2009 [Page 46] Internet-Draft YANG-TYPES May 2009 The ip-prefix type represents an IP prefix and is IP version neutral. The format of the textual representations implies the IP version. The ipv4-prefix type represents an IPv4 address prefix. The prefix length is given by the number following the slash character and must be less than or equal to 32. A prefix length value of n corresponds to an IP address mask which has n contiguous 1-bits from the most significant bit (MSB) and all other bits set to 0. The canonical format of an IPv4 prefix has all bits of the IPv4 address set to zero that are not part of the IPv4 prefix. Schoenwaelder Expires November 14, 2009 [Page 47] Internet-Draft YANG-TYPES May 2009 The ipv6-prefix type represents an IPv6 address prefix. The prefix length is given by the number following the slash character and must be less than or equal 128. A prefix length value of n corresponds to an IP address mask which has n contiguous 1-bits from the most significant bit (MSB) and all other bits set to 0. The IPv6 address should have all bits that do not belong to the prefix set to zero. The canonical format of an IPv6 prefix has all bits of the IPv6 address set to zero that are not part of the IPv6 prefix. Furthermore, IPv6 address is represented in the compressed format described in RFC 4291 section 2.2 item 2 with the following additional rules: The :: substitution must be applied to the longest sequence of all-zero 16-bit chunks in an IPv6 address. If there is a tie, the first sequence of all-zero 16-bit chunks is replaced by ::. Single all-zero 16-bit chunks are not compressed. The normalized format uses lower-case characters and leading zeros are not allowed. The domain-name type represents a DNS domain name. The name SHOULD be fully qualified whenever possible. Internet domain names are only loosely specified. Section 3.5 of RFC 1034 recommends a syntax (modified in section 2.1 of RFC 1123). The pattern above is intended to allow for current practise in domain name use, and some possible future expansion. It is designed to hold various types of domain names, including names used for A or AAAA records (host names) and other records, such as SRV records. Note that Internet host names have a stricter syntax (described in RFC 952) than the DNS recommendations in RFCs 1034 and 1123, and that systems that want to store host names in objects using the domain-name type are recommended to adhere to this stricter standard to ensure interoperability. The encoding of DNS names in the DNS protocol is limited to 255 characters. Since the encoding consists of labels prefixed by a length bytes and there is a trailing NULL byte, only 253 characters can appear in the textual dotted notation. The description clause of objects using the domain-name type MUST describe how (and when) these names are resolved to IP addresses. Note that the resolution of a domain-name value may require to query multiple DNS records (e.g., A for IPv4 and AAAA for IPv6). The order of the resolution process and which DNS record takes precedence depends on the configuration of the resolver. The canonical format for domain-name values uses the US-ASCII encoding and case-insensitive characters are set to lowercase. Schoenwaelder Expires November 14, 2009 [Page 49] Internet-Draft YANG-TYPES May 2009 The host type represents either an IP address or a DNS domain name. The uri type represents a Uniform Resource Identifier (URI) as defined by STD 66. Objects using the uri type must be in US-ASCII encoding, and MUST be normalized as described by RFC 3986 Sections 6.2.1, 6.2.2.1, and 6.2.2.2. All unnecessary percent-encoding is removed, and all case-insensitive characters are set to lowercase except for hexadecimal digits, which are normalized to uppercase as described in Section 6.2.2.1. The purpose of this normalization is to help provide unique URIs. Note that this normalization is not sufficient to provide uniqueness. Two URIs that are textually distinct after this normalization may still be equivalent. Objects using the uri type may restrict the schemes that they permit. For example, 'data:' and 'urn:' schemes might not be appropriate. A zero-length URI is not a valid URI. This can be used to express 'URI absent' where required This type is in the value set and its semantics equivalent Schoenwaelder Expires November 14, 2009 [Page 50] Internet-Draft YANG-TYPES May 2009 to the Uri SMIv2 textual convention defined in RFC 5017. Schoenwaelder Expires November 14, 2009 [Page 51] Internet-Draft YANG-TYPES May 2009 Appendix B. RelaxNG Translations This appendix provides RelaxNG translations of the types defined in this document. This appendix is informative and not normative. B.1. RelaxNG of Core YANG Derived Types namespace a = "http://relaxng.org/ns/compatibility/annotations/1.0" namespace dc = "http://purl.org/dc/terms" namespace dsrl = "http://purl.oclc.org/dsdl/dsrl" namespace nm = "urn:ietf:params:xml:ns:netmod:dsdl-attrib:1" namespace sch = "http://purl.oclc.org/dsdl/schematron" namespace yang = "urn:ietf:params:xml:ns:yang:yang-types" dc:creator [ "IETF NETMOD (NETCONF Data Modeling Language) Working Group" ] dc:description [ "This module contains a collection of generally useful derived\x{a}" ~ "YANG data types.\x{a}" ~ "\x{a}" ~ "Copyright (c) 2009 IETF Trust and the persons identified as\x{a}" ~ "the document authors. All rights reserved.\x{a}" ~ "\x{a}" ~ "Redistribution and use in source and binary forms, with or\x{a}" ~ "without modification, are permitted provided that the\x{a}" ~ "following conditions are met:\x{a}" ~ "\x{a}" ~ "- Redistributions of source code must retain the above\x{a}" ~ " copyright notice, this list of conditions and the\x{a}" ~ " following disclaimer.\x{a}" ~ "\x{a}" ~ "- Redistributions in binary form must reproduce the above\x{a}" ~ " copyright notice, this list of conditions and the\x{a}" ~ " following disclaimer in the documentation and/or other\x{a}" ~ " materials provided with the distribution.\x{a}" ~ "\x{a}" ~ "- Neither the name of Internet Society, IETF or IETF\x{a}" ~ " Trust, nor the names of specific contributors, may be\x{a}" ~ " used to endorse or promote products derived from this\x{a}" ~ " software without specific prior written permission.\x{a}" ~ "\x{a}" ~ "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND\x{a}" ~ "CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED\x{a}" ~ "WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\x{a}" ~ "WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\x{a}" ~ "PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\x{a}" ~ "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,\x{a}" ~ Schoenwaelder Expires November 14, 2009 [Page 52] Internet-Draft YANG-TYPES May 2009 "INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\x{a}" ~ "(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE\x{a}" ~ "GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\x{a}" ~ "BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\x{a}" ~ "LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\x{a}" ~ "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT\x{a}" ~ "OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\x{a}" ~ "POSSIBILITY OF SUCH DAMAGE.\x{a}" ~ "\x{a}" ~ "This version of this YANG module is part of RFC XXXX; see\x{a}" ~ "the RFC itself for full legal notices." ] dc:issued [ "2009-05-13" ] dc:source [ "YANG module 'ietf-yang-types' (automatic translation)" ] dc:contributor [ "WG Web: \x{a}" ~ "WG List: \x{a}" ~ "\x{a}" ~ "WG Chair: David Partain\x{a}" ~ " \x{a}" ~ "\x{a}" ~ "WG Chair: David Kessens\x{a}" ~ " \x{a}" ~ "\x{a}" ~ "Editor: Juergen Schoenwaelder\x{a}" ~ " " ] ## The counter32 type represents a non-negative integer ## which monotonically increases until it reaches a ## maximum value of 2^32-1 (4294967295 decimal), when it ## wraps around and starts increasing again from zero. ## ## Counters have no defined `initial' value, and thus, a ## single value of a counter has (in general) no information ## content. Discontinuities in the monotonically increasing ## value normally occur at re-initialization of the ## management system, and at other times as specified in the ## description of an object instance using this type. If ## such other times can occur, for example, the creation of ## an object instance of type counter32 at times other than ## re-initialization, then a corresponding object should be ## defined, with an appropriate type, to indicate the last ## discontinuity. ## ## The counter32 type should not be used for configuration ## objects. A default statement should not be used for ## attributes with a type value of counter32. Schoenwaelder Expires November 14, 2009 [Page 53] Internet-Draft YANG-TYPES May 2009 ## ## This type is in the value set and its semantics equivalent ## to the Counter32 type of the SMIv2. ## See: RFC 2578: Structure of Management Information Version 2 (SMIv2) counter32 = xsd:unsignedInt ## The zero-based-counter32 type represents a counter32 ## which has the defined `initial' value zero. ## ## Objects of this type will be set to zero(0) on creation ## and will thereafter count appropriate events, wrapping ## back to zero(0) when the value 2^32 is reached. ## ## Provided that an application discovers the new object within ## the minimum time to wrap it can use the initial value as a ## delta since it last polled the table of which this object is ## part. It is important for a management station to be aware ## of this minimum time and the actual time between polls, and ## to discard data if the actual time is too long or there is ## no defined minimum time. ## ## This type is in the value set and its semantics equivalent ## to the ZeroBasedCounter32 textual convention of the SMIv2. ## See: RFC 2021: Remote Network Monitoring Management Information ## Base Version 2 using SMIv2 zero-based-counter32 = counter32 >> dsrl:default-content [ "0" ] ## The counter64 type represents a non-negative integer ## which monotonically increases until it reaches a ## maximum value of 2^64-1 (18446744073709551615), when ## it wraps around and starts increasing again from zero. ## ## Counters have no defined `initial' value, and thus, a ## single value of a counter has (in general) no information ## content. Discontinuities in the monotonically increasing ## value normally occur at re-initialization of the ## management system, and at other times as specified in the ## description of an object instance using this type. If ## such other times can occur, for example, the creation of ## an object instance of type counter64 at times other than ## re-initialization, then a corresponding object should be ## defined, with an appropriate type, to indicate the last ## discontinuity. ## ## The counter64 type should not be used for configuration ## objects. A default statement should not be used for Schoenwaelder Expires November 14, 2009 [Page 54] Internet-Draft YANG-TYPES May 2009 ## attributes with a type value of counter64. ## ## This type is in the value set and its semantics equivalent ## to the Counter64 type of the SMIv2. ## See: RFC 2578: Structure of Management Information Version 2 (SMIv2) counter64 = xsd:unsignedLong ## The zero-based-counter64 type represents a counter64 which ## has the defined `initial' value zero. ## ## Objects of this type will be set to zero(0) on creation ## and will thereafter count appropriate events, wrapping ## back to zero(0) when the value 2^64 is reached. ## ## Provided that an application discovers the new object within ## the minimum time to wrap it can use the initial value as a ## delta since it last polled the table of which this object is ## part. It is important for a management station to be aware ## of this minimum time and the actual time between polls, and ## to discard data if the actual time is too long or there is ## no defined minimum time. ## ## This type is in the value set and its semantics equivalent ## to the ZeroBasedCounter64 textual convention of the SMIv2. ## See: RFC 2856: Textual Conventions for Additional High Capacity ## Data Types zero-based-counter64 = counter64 >> dsrl:default-content [ "0" ] ## The gauge32 type represents a non-negative integer, which ## may increase or decrease, but shall never exceed a maximum ## value, nor fall below a minimum value. The maximum value ## can not be greater than 2^32-1 (4294967295 decimal), and ## the minimum value can not be smaller than 0. The value of ## a gauge32 has its maximum value whenever the information ## being modeled is greater than or equal to its maximum ## value, and has its minimum value whenever the information ## being modeled is smaller than or equal to its minimum value. ## If the information being modeled subsequently decreases ## below (increases above) the maximum (minimum) value, the ## gauge32 also decreases (increases). ## ## This type is in the value set and its semantics equivalent ## to the Counter32 type of the SMIv2. ## See: RFC 2578: Structure of Management Information Version 2 (SMIv2) gauge32 = xsd:unsignedInt Schoenwaelder Expires November 14, 2009 [Page 55] Internet-Draft YANG-TYPES May 2009 ## The gauge64 type represents a non-negative integer, which ## may increase or decrease, but shall never exceed a maximum ## value, nor fall below a minimum value. The maximum value ## can not be greater than 2^64-1 (18446744073709551615), and ## the minimum value can not be smaller than 0. The value of ## a gauge64 has its maximum value whenever the information ## being modeled is greater than or equal to its maximum ## value, and has its minimum value whenever the information ## being modeled is smaller than or equal to its minimum value. ## If the information being modeled subsequently decreases ## below (increases above) the maximum (minimum) value, the ## gauge64 also decreases (increases). ## ## This type is in the value set and its semantics equivalent ## to the CounterBasedGauge64 SMIv2 textual convention defined ## in RFC 2856 ## See: RFC 2856: Textual Conventions for Additional High Capacity ## Data Types gauge64 = xsd:unsignedLong ## The object-identifier type represents administratively ## assigned names in a registration-hierarchical-name tree. ## ## Values of this type are denoted as a sequence of numerical ## non-negative sub-identifier values. Each sub-identifier ## value MUST NOT exceed 2^32-1 (4294967295). Sub-identifiers ## are separated by single dots and without any intermediate ## white space. ## ## Although the number of sub-identifiers is not limited, ## module designers should realize that there may be ## implementations that stick with the SMIv2 limit of 128 ## sub-identifiers. ## ## This type is a superset of the SMIv2 OBJECT IDENTIFIER type ## since it is not restricted to 128 sub-identifiers. ## See: ISO/IEC 9834-1: Information technology -- Open Systems ## Interconnection -- Procedures for the operation of OSI ## Registration Authorities: General procedures and top ## arcs of the ASN.1 Object Identifier tree object-identifier = xsd:string { pattern = "(([0-1](\.[1-3]?[0-9]))|(2\.(0|([1-9]\d*))))(\.(0|([1-9]\d*)))*" } Schoenwaelder Expires November 14, 2009 [Page 56] Internet-Draft YANG-TYPES May 2009 ## This type represents object-identifiers restricted to 128 ## sub-identifiers. ## ## This type is in the value set and its semantics equivalent ## to the OBJECT IDENTIFIER type of the SMIv2. ## See: RFC 2578: Structure of Management Information Version 2 (SMIv2) object-identifier-128 = object-identifier ## The date-and-time type is a profile of the ISO 8601 ## standard for representation of dates and times using the ## Gregorian calendar. The format is most easily described ## using the following ABFN (see RFC 3339): ## ## date-fullyear = 4DIGIT ## date-month = 2DIGIT ; 01-12 ## date-mday = 2DIGIT ; 01-28, 01-29, 01-30, 01-31 ## time-hour = 2DIGIT ; 00-23 ## time-minute = 2DIGIT ; 00-59 ## time-second = 2DIGIT ; 00-58, 00-59, 00-60 ## time-secfrac = "." 1*DIGIT ## time-numoffset = ("+" / "-") time-hour ":" time-minute ## time-offset = "Z" / time-numoffset ## ## partial-time = time-hour ":" time-minute ":" time-second ## [time-secfrac] ## full-date = date-fullyear "-" date-month "-" date-mday ## full-time = partial-time time-offset ## ## date-time = full-date "T" full-time ## ## The date-and-time type is consistent with the semantics defined ## in RFC 3339. The data-and-time type is compatible with the ## dateTime XML schema type with the following two notable ## exceptions: ## ## (a) The data-and-time type does not allow negative years. ## ## (b) The data-and-time time-offset -00:00 indicates an unknown ## time zone (see RFC 3339) while -00:00 and +00:00 and Z all ## represent the same time zone in dateTime. ## ## This type is not equivalent to the DateAndTime textual ## convention of the SMIv2 since RFC 3339 uses a different ## separator between full-date and full-time and provides ## higher resolution of time-secfrac. ## ## The canonical format for date-and-time values mandates the UTC Schoenwaelder Expires November 14, 2009 [Page 57] Internet-Draft YANG-TYPES May 2009 ## time format with the time-offset is indicated by the letter "Z". ## This is consistent with the canonical format used by the ## dateTime XML schema type. ## See: RFC 3339: Date and Time on the Internet: Timestamps ## RFC 2579: Textual Conventions for SMIv2 ## W3C REC-xmlschema-2-20041028: XML Schema Part 2: Datatypes ## Second Edition date-and-time = xsd:string { pattern = "\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d+)?(Z|(\+|-)\d{2}:\d{2})" } ## The timeticks type represents a non-negative integer which ## represents the time, modulo 2^32 (4294967296 decimal), in ## hundredths of a second between two epochs. When objects ## are defined which use this type, the description of the ## object identifies both of the reference epochs. ## ## This type is in the value set and its semantics equivalent ## to the TimeTicks type of the SMIv2. ## See: RFC 2578: Structure of Management Information Version 2 (SMIv2) timeticks = xsd:unsignedInt ## The timestamp type represents the value of an associated ## timeticks object at which a specific occurrence happened. ## The specific occurrence must be defined in the description ## of any object defined using this type. When the specific ## occurrence occurred prior to the last time the associated ## timeticks attribute was zero, then the timestamp value is ## zero. Note that this requires all timestamp values to be ## reset to zero when the value of the associated timeticks ## attribute reaches 497+ days and wraps around to zero. ## ## The associated timeticks object must be specified ## in the description of any object using this type. ## ## This type is in the value set and its semantics equivalent ## to the TimeStamp textual convention of the SMIv2. ## See: RFC 2579: Textual Conventions for SMIv2 timestamp = timeticks ## Represents media- or physical-level addresses represented ## as a sequence octets, each octet represented by two hexadecimal ## numbers. Octets are separated by colons. Schoenwaelder Expires November 14, 2009 [Page 58] Internet-Draft YANG-TYPES May 2009 ## ## This type is in the value set and its semantics equivalent ## to the PhysAddress textual convention of the SMIv2. ## See: RFC 2579: Textual Conventions for SMIv2 phys-address = xsd:string { pattern = "([0-9a0-fA-F]{2}(:[0-9a0-fA-F]{2})*)?" } ## The mac-address type represents an 802 MAC address represented ## in the `canonical' order defined by IEEE 802.1a, i.e., as if it ## were transmitted least significant bit first, even though 802.5 ## (in contrast to other 802.x protocols) requires MAC addresses ## to be transmitted most significant bit first. ## ## This type is in the value set and its semantics equivalent to ## the MacAddress textual convention of the SMIv2. ## See: RFC 2579: Textual Conventions for SMIv2 mac-address = xsd:string { pattern = "[0-9a-fA-F]{2}(:[0-9a-fA-F]{2}){5}" } ## This type represents an XPATH 1.0 expression. ## See: W3C REC-xpath-19991116: XML Path Language (XPath) Version 1.0 xpath1.0 = xsd:string B.2. RelaxNG of Internet Specific Derived Types namespace a = "http://relaxng.org/ns/compatibility/annotations/1.0" namespace dc = "http://purl.org/dc/terms" namespace dsrl = "http://purl.oclc.org/dsdl/dsrl" namespace inet = "urn:ietf:params:xml:ns:yang:inet-types" namespace nm = "urn:ietf:params:xml:ns:netmod:dsdl-attrib:1" namespace sch = "http://purl.oclc.org/dsdl/schematron" dc:creator [ "IETF NETMOD (NETCONF Data Modeling Language) Working Group" ] dc:description [ "This module contains a collection of generally useful derived\x{a}" ~ "YANG data types for Internet addresses and related things.\x{a}" ~ "\x{a}" ~ "Copyright (c) 2009 IETF Trust and the persons identified as\x{a}" ~ "the document authors. All rights reserved.\x{a}" ~ "\x{a}" ~ "Redistribution and use in source and binary forms, with or\x{a}" ~ "without modification, are permitted provided that the\x{a}" ~ "following conditions are met:\x{a}" ~ Schoenwaelder Expires November 14, 2009 [Page 59] Internet-Draft YANG-TYPES May 2009 "\x{a}" ~ "- Redistributions of source code must retain the above\x{a}" ~ " copyright notice, this list of conditions and the\x{a}" ~ " following disclaimer.\x{a}" ~ "\x{a}" ~ "- Redistributions in binary form must reproduce the above\x{a}" ~ " copyright notice, this list of conditions and the\x{a}" ~ " following disclaimer in the documentation and/or other\x{a}" ~ " materials provided with the distribution.\x{a}" ~ "\x{a}" ~ "- Neither the name of Internet Society, IETF or IETF\x{a}" ~ " Trust, nor the names of specific contributors, may be\x{a}" ~ " used to endorse or promote products derived from this\x{a}" ~ " software without specific prior written permission.\x{a}" ~ "\x{a}" ~ "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND\x{a}" ~ "CONTRIBUTORS 'AS IS' AND ANY EXPRESS OR IMPLIED\x{a}" ~ "WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\x{a}" ~ "WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\x{a}" ~ "PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\x{a}" ~ "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,\x{a}" ~ "INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\x{a}" ~ "(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE\x{a}" ~ "GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\x{a}" ~ "BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\x{a}" ~ "LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\x{a}" ~ "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT\x{a}" ~ "OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\x{a}" ~ "POSSIBILITY OF SUCH DAMAGE.\x{a}" ~ "\x{a}" ~ "This version of this YANG module is part of RFC XXXX; see \x{a}" ~ "the RFC itself for full legal notices." ] dc:issued [ "2009-05-13" ] dc:source [ "YANG module 'ietf-inet-types' (automatic translation)" ] dc:contributor [ "WG Web: \x{a}" ~ "WG List: \x{a}" ~ "\x{a}" ~ "WG Chair: David Partain\x{a}" ~ " \x{a}" ~ "\x{a}" ~ "WG Chair: David Kessens\x{a}" ~ " \x{a}" ~ "\x{a}" ~ "Editor: Juergen Schoenwaelder\x{a}" ~ " " ] Schoenwaelder Expires November 14, 2009 [Page 60] Internet-Draft YANG-TYPES May 2009 ## This value represents the version of the IP protocol. ## ## This type is in the value set and its semantics equivalent ## to the InetVersion textual convention of the SMIv2. However, ## the lexical appearance is different from the InetVersion ## textual convention. ## See: RFC 791: Internet Protocol ## RFC 2460: Internet Protocol, Version 6 (IPv6) Specification ## RFC 4001: Textual Conventions for Internet Network Addresses ip-version = "unknown" | "ipv4" | "ipv6" ## The dscp type represents a Differentiated Services Code-Point ## that may be used for marking packets in a traffic stream. ## ## This type is in the value set and its semantics equivalent ## to the Dscp textual convention of the SMIv2. ## See: RFC 3289: Management Information Base for the Differentiated ## Services Architecture ## RFC 2474: Definition of the Differentiated Services Field ## (DS Field) in the IPv4 and IPv6 Headers ## RFC 2780: IANA Allocation Guidelines For Values In ## the Internet Protocol and Related Headers dscp = xsd:unsignedByte { minInclusive = "0" maxInclusive = "63" } ## The flow-label type represents flow identifier or Flow Label ## in an IPv6 packet header that may be used to discriminate ## traffic flows. ## ## This type is in the value set and its semantics equivalent ## to the IPv6FlowLabel textual convention of the SMIv2. ## See: RFC 3595: Textual Conventions for IPv6 Flow Label ## RFC 2460: Internet Protocol, Version 6 (IPv6) Specification ipv6-flow-label = xsd:unsignedInt { minInclusive = "0" maxInclusive = "1048575" } ## The port-number type represents a 16-bit port number of an ## Internet transport layer protocol such as UDP, TCP, DCCP or ## SCTP. Port numbers are assigned by IANA. A current list of ## all assignments is available from . ## ## Note that the value zero is not a valid port number. A union ## type might be used in situations where the value zero is ## meaningful. ## ## This type is in the value set and its semantics equivalent Schoenwaelder Expires November 14, 2009 [Page 61] Internet-Draft YANG-TYPES May 2009 ## to the InetPortNumber textual convention of the SMIv2. ## See: RFC 768: User Datagram Protocol ## RFC 793: Transmission Control Protocol ## RFC 2960: Stream Control Transmission Protocol ## RFC 4340: Datagram Congestion Control Protocol (DCCP) ## RFC 4001: Textual Conventions for Internet Network Addresses port-number = xsd:unsignedShort { minInclusive = "1" maxInclusive = "65535" } ## The as-number type represents autonomous system numbers ## which identify an Autonomous System (AS). An AS is a set ## of routers under a single technical administration, using ## an interior gateway protocol and common metrics to route ## packets within the AS, and using an exterior gateway ## protocol to route packets to other ASs'. IANA maintains ## the AS number space and has delegated large parts to the ## regional registries. ## ## Autonomous system numbers were originally limited to 16 ## bits. BGP extensions have enlarged the autonomous system ## number space to 32 bits. This type therefore uses an uint32 ## base type without a range restriction in order to support ## a larger autonomous system number space. ## ## This type is in the value set and its semantics equivalent ## to the InetAutonomousSystemNumber textual convention of ## the SMIv2. ## See: RFC 1930: Guidelines for creation, selection, and registration ## of an Autonomous System (AS) ## RFC 4271: A Border Gateway Protocol 4 (BGP-4) ## RFC 4893: BGP Support for Four-octet AS Number Space ## RFC 4001: Textual Conventions for Internet Network Addresses as-number = xsd:unsignedInt ## The ip-address type represents an IP address and is IP ## version neutral. The format of the textual representations ## implies the IP version. ip-address = ipv4-address | ipv6-address ## The ipv4-address type represents an IPv4 address in ## dotted-quad notation. The IPv4 address may include a zone ## index, separated by a % sign. ## ## The zone index is used to disambiguate identical address ## values. For link-local addresses, the zone index will ## typically be the interface index number or the name of an Schoenwaelder Expires November 14, 2009 [Page 62] Internet-Draft YANG-TYPES May 2009 ## interface. If the zone index is not present, the default ## zone of the device will be used. ## ## The canonical format for the zone index is the numerical ## format ipv4-address = xsd:string { pattern = "((0|(1[0-9]{0,2})|(2(([0-4][0-9]?)|(5[0-5]?)|([6-9]?)" ~ "))|([3-9][0-9]?))\.){3}(0|(1[0-9]{0,2})|(2(([0-4][0-9]?)|(5[" ~ "0-5]?)|([6-9]?)))|([3-9][0-9]?))(%[\p{N}\p{L}]+)?" } ## The ipv6-address type represents an IPv6 address in full, ## mixed, shortened and shortened mixed notation. The IPv6 ## address may include a zone index, separated by a % sign. ## ## The zone index is used to disambiguate identical address ## values. For link-local addresses, the zone index will ## typically be the interface index number or the name of an ## interface. If the zone index is not present, the default ## zone of the device will be used. ## ## The canonical format of IPv6 addresses uses the compressed ## format described in RFC 4291 section 2.2 item 2 with the ## following additional rules: The :: substitution must be ## applied to the longest sequence of all-zero 16-bit chunks ## in an IPv6 address. If there is a tie, the first sequence ## of all-zero 16-bit chunks is replaced by ::. Single ## all-zero 16-bit chunks are not compressed. The normalized ## format uses lower-case characters and leading zeros are ## not allowed. The canonical format for the zone index is ## the numerical format as described in RFC 4007 section ## 11.2. ## See: RFC 4291: IP Version 6 Addressing Architecture ## RFC 4007: IPv6 Scoped Address Architecture ipv6-address = xsd:string { pattern = "((:|[0-9a-fA-F]{0,4}):)([0-9a-fA-F]{0,4}:){0,5}((([0-" ~ "9a-fA-F]{0,4}:)?(:|[0-9a-fA-F]{0,4}))|(((25[0-5]|2[0-4][0-9]" ~ "|[01]?[0-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9" ~ "])))(%[\p{N}\p{L}]+)?" pattern = "(([^:]+:){6}(([^:]+:[^:]+)|(.*\..*)))|((([^:]+:)*[^:]" ~ "+)?::(([^:]+:)*[^:]+)?)(%.+)?" } Schoenwaelder Expires November 14, 2009 [Page 63] Internet-Draft YANG-TYPES May 2009 ## The ip-prefix type represents an IP prefix and is IP ## version neutral. The format of the textual representations ## implies the IP version. ip-prefix = ipv4-prefix | ipv6-prefix ## The ipv4-prefix type represents an IPv4 address prefix. ## The prefix length is given by the number following the ## slash character and must be less than or equal to 32. ## ## A prefix length value of n corresponds to an IP address ## mask which has n contiguous 1-bits from the most ## significant bit (MSB) and all other bits set to 0. ## ## The canonical format of an IPv4 prefix has all bits of ## the IPv4 address set to zero that are not part of the ## IPv4 prefix. ipv4-prefix = xsd:string { pattern = "(([0-1]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-1]?" ~ "[0-9]?[0-9]|2[0-4][0-9]|25[0-5])/(([0-9])|([1-2][0-9])|(3[0-" ~ "2]))" } ## The ipv6-prefix type represents an IPv6 address prefix. ## The prefix length is given by the number following the ## slash character and must be less than or equal 128. ## ## A prefix length value of n corresponds to an IP address ## mask which has n contiguous 1-bits from the most ## significant bit (MSB) and all other bits set to 0. ## ## The IPv6 address should have all bits that do not belong ## to the prefix set to zero. ## ## The canonical format of an IPv6 prefix has all bits of ## the IPv6 address set to zero that are not part of the ## IPv6 prefix. Furthermore, IPv6 address is represented ## in the compressed format described in RFC 4291 section ## 2.2 item 2 with the following additional rules: The :: ## substitution must be applied to the longest sequence of ## all-zero 16-bit chunks in an IPv6 address. If there is ## a tie, the first sequence of all-zero 16-bit chunks is ## replaced by ::. Single all-zero 16-bit chunks are not ## compressed. The normalized format uses lower-case ## characters and leading zeros are not allowed. ## See: RFC 4291: IP Version 6 Addressing Architecture Schoenwaelder Expires November 14, 2009 [Page 64] Internet-Draft YANG-TYPES May 2009 ipv6-prefix = xsd:string { pattern = "((:|[0-9a-fA-F]{0,4}):)([0-9a-fA-F]{0,4}:){0,5}((([0-" ~ "9a-fA-F]{0,4}:)?(:|[0-9a-fA-F]{0,4}))|(((25[0-5]|2[0-4][0-9]" ~ "|[01]?[0-9]?[0-9])\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9" ~ "])))(/(([0-9])|([0-9]{2})|(1[0-1][0-9])|(12[0-8])))" pattern = "(([^:]+:){6}(([^:]+:[^:]+)|(.*\..*)))|((([^:]+:)*[^:]" ~ "+)?::(([^:]+:)*[^:]+)?)(/.+)" } ## The domain-name type represents a DNS domain name. The ## name SHOULD be fully qualified whenever possible. ## ## Internet domain names are only loosely specified. Section ## 3.5 of RFC 1034 recommends a syntax (modified in section ## 2.1 of RFC 1123). The pattern above is intended to allow ## for current practise in domain name use, and some possible ## future expansion. It is designed to hold various types of ## domain names, including names used for A or AAAA records ## (host names) and other records, such as SRV records. Note ## that Internet host names have a stricter syntax (described ## in RFC 952) than the DNS recommendations in RFCs 1034 and ## 1123, and that systems that want to store host names in ## objects using the domain-name type are recommended to adhere ## to this stricter standard to ensure interoperability. ## ## The encoding of DNS names in the DNS protocol is limited ## to 255 characters. Since the encoding consists of labels ## prefixed by a length bytes and there is a trailing NULL ## byte, only 253 characters can appear in the textual dotted ## notation. ## ## The description clause of objects using the domain-name ## type MUST describe how (and when) these names are ## resolved to IP addresses. Note that the resolution of a ## domain-name value may require to query multiple DNS records ## (e.g., A for IPv4 and AAAA for IPv6). The order of the ## resolution process and which DNS record takes precedence ## depends on the configuration of the resolver. ## ## The canonical format for domain-name values uses the ## US-ASCII encoding and case-insensitive characters are set ## to lowercase. ## See: RFC 952: DoD Internet Host Table Specification ## RFC 1034: Domain Names - Concepts and Facilities Schoenwaelder Expires November 14, 2009 [Page 65] Internet-Draft YANG-TYPES May 2009 ## RFC 1123: Requirements for Internet Hosts -- Application ## and Support ## RFC 3490: Internationalizing Domain Names in Applications ## (IDNA) domain-name = xsd:string { pattern = "((([a-zA-Z0-9_]([a-zA-Z0-9\-_]){0,61})?[a-zA-Z0-9]\.)" ~ "*([a-zA-Z0-9_]([a-zA-Z0-9\-_]){0,61})?[a-zA-Z0-9]\.?)|\." minLength = "1" maxLength = "253" } ## The host type represents either an IP address or a DNS ## domain name. host = ip-address | domain-name ## The uri type represents a Uniform Resource Identifier ## (URI) as defined by STD 66. ## ## Objects using the uri type must be in US-ASCII encoding, ## and MUST be normalized as described by RFC 3986 Sections ## 6.2.1, 6.2.2.1, and 6.2.2.2. All unnecessary ## percent-encoding is removed, and all case-insensitive ## characters are set to lowercase except for hexadecimal ## digits, which are normalized to uppercase as described in ## Section 6.2.2.1. ## ## The purpose of this normalization is to help provide ## unique URIs. Note that this normalization is not ## sufficient to provide uniqueness. Two URIs that are ## textually distinct after this normalization may still be ## equivalent. ## ## Objects using the uri type may restrict the schemes that ## they permit. For example, 'data:' and 'urn:' schemes ## might not be appropriate. ## ## A zero-length URI is not a valid URI. This can be used to ## express 'URI absent' where required ## ## This type is in the value set and its semantics equivalent ## to the Uri SMIv2 textual convention defined in RFC 5017. ## See: RFC 3986: Uniform Resource Identifier (URI): Generic Syntax ## RFC 3305: Report from the Joint W3C/IETF URI Planning Interest ## Group: Uniform Resource Identifiers (URIs), URLs, ## and Uniform Resource Names (URNs): Clarifications Schoenwaelder Expires November 14, 2009 [Page 66] Internet-Draft YANG-TYPES May 2009 ## and Recommendations ## RFC 5017: MIB Textual Conventions for Uniform Resource ## Identifiers (URIs) uri = xsd:string Schoenwaelder Expires November 14, 2009 [Page 67] Internet-Draft YANG-TYPES May 2009 Author's Address Juergen Schoenwaelder (editor) Jacobs University Email: j.schoenwaelder@jacobs-university.de Schoenwaelder Expires November 14, 2009 [Page 68]