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Zeroconf: Difference between revisions
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===Service Type Enumeration=== | ===Service Type Enumeration=== | ||
Service types can be enumerated by querying <tt>_services._dns-sd._udp.domain</tt> for a given domain. The reply is a set of PTR records. | Service types can be enumerated by querying <tt>_services._dns-sd._udp.domain</tt> for a given domain. The reply is a set of PTR records. | ||
* Avahi seems to support Service Type Enumeration, while Bonjour does not (November 2011) | |||
===Service Instance Enumeration=== | ===Service Instance Enumeration=== | ||
Rather than using the [[SRV]] record, SD makes use of PTR. | Rather than using the [[SRV]] record, SD makes use of PTR. | ||
* The temporary [http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml SRV Record Type] registry was closed in 2010... | |||
* ...and rolled into the RFC 6335-conformant [http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml United Service Name and Transport Number] Registry | |||
==See also== | ==See also== | ||
* "[http://tools.ietf.org/html/draft-cheshire-dnsext-dns-sd-10 DNS-based Service Discovery]" Stuart Chesire, 2011-02-27. | * "[http://tools.ietf.org/html/draft-cheshire-dnsext-dns-sd-10 DNS-based Service Discovery]" Stuart Chesire, 2011-02-27. | ||
* "[http://www.amazon.com/Zero-Configuration-Networking-Definitive-Guide/dp/0596101007 Zero-configuration Networking: The Definitive Guide]" from O'Reilly | * "[http://www.amazon.com/Zero-Configuration-Networking-Definitive-Guide/dp/0596101007 Zero-configuration Networking: The Definitive Guide]" from O'Reilly | ||
[[CATEGORY: Networking]] | |||
Latest revision as of 02:31, 20 November 2011
Courtesy of the IETF Zeroconf Working Group, by way of AppleTalk, NETBIOS, IPX and countless other nonstandardized protocols, Zero Configuration Networking attempts to simplify and automate local area networking (especially in the absence of suitable UIs). On UNIX, Avahi provides the mainstream Linux Zeroconf implementation; it is known as Bonjour on Apple products. Zeroconf's primary technologies include:
- Uni- and multicast address autoconfiguration via Link-Local Addressing (typically static, or managed via DHCP)
- Name translation via Multicast DNS (mDNS) (typically static, or managed via DNS)
- Service discovery via DNS Service Discovery (DNS-SD) (typically managed via a directory server)
Service Discovery
Service Type Enumeration
Service types can be enumerated by querying _services._dns-sd._udp.domain for a given domain. The reply is a set of PTR records.
- Avahi seems to support Service Type Enumeration, while Bonjour does not (November 2011)
Service Instance Enumeration
Rather than using the SRV record, SD makes use of PTR.
- The temporary SRV Record Type registry was closed in 2010...
- ...and rolled into the RFC 6335-conformant United Service Name and Transport Number Registry
See also
- "DNS-based Service Discovery" Stuart Chesire, 2011-02-27.
- "Zero-configuration Networking: The Definitive Guide" from O'Reilly
