A device acting as a sleep proxy server will respond to Multicast DNS queries for another compatible device which has gone into low power mode. The low-power-mode device remains asleep while the sleep proxy server responds to Multicast DNS queries.[2] When the sleep proxy server sees a query which requires the low-power-mode device to wake up, the sleep proxy server sends a special wake-up-packet ("magic packet") to the low-power-mode device. Finally, communication parameters are updated via Multicast DNS, and normal communications proceed.[2]
Apple refers to the service as Bonjour Sleep Proxy in its support documents.[3] The service supports the Wake on Demand feature, first offered in Mac OS X Snow Leopard.[4]
When a sleep proxy sees an IPv4 ARP or IPv6 ND Request for one of the sleeping device's addresses, it answers on behalf of the sleeping device, without waking it up, giving its own MAC address as the current (temporary) owner of that address.
This may appear confusing to network administrators who are not expecting the behaviour of changing MAC addresses.
Wireless magic packet
In case the low-power-mode device is communicating via Wi-Fi, the wake-up-packet is sent via Wireless Multimedia Extensions (WMM).[4] This was not possible in previous implementations of Wake on LAN (WoL). The wireless hardware must be updated enough to include WMM support.[4] Apple provides instructions for checking compatibility with this feature for Macintosh computers.[3]
Supported services and examples
The sleep proxy service is able to advertise any Bonjour-supported services, while the host computer sleeps. Some examples of supported services are:[3]
File sharing: a host supporting the sleep proxy service, which offers file services, may go to sleep as needed. When someone needs to access shared files, the host will wake up automatically.
iTunes library sharing: the computer hosting the iTunes library may go to sleep, and will automatically wake when someone wishes to browse the iTunes library from a different PC.
Printer sharing: a printer may be connected and shared from a computer supporting sleep proxy service. The computer can go to sleep when not in use, but will wake when needed to service a print job being sent from a different computer.
SSH: a computer offering SSH access may go to sleep, and awaken via the sleep proxy service when an SSH login is initiated.
^Note: see mDNSResponder source code at www.macosforge.org, which includes a full implementation of the DNS-SD/mDNS Sleep Proxy Service, available under the Apache 2.0 Open Source license.
^ abcdMarc Krochmal (2010-03-23). "Internet Draft: draft-cheshire-dnsext-multicastdns-11". Apple Inc. Retrieved 2010-05-30.
^ abcdef"Mac OS X v10.6: About Wake on Demand (Apple Article HT3774)". Apple. 2009-08-27. Retrieved 2009-09-15. Setting up Wake on Demand", "Setting up a Bonjour Sleep Proxy
^ abcGlenn Fleishman (2009-08-28). . Macworld.com. Archived from the original on 2009-09-16. Retrieved 2009-09-15. How it works", "Energy Saver preference pane
^Apple Inc. Worldwide Developers Conference (WWDC) 2009, Session 508, Zero Configuration Networking Using Bonjour(PDF). Archived from the original (PDF) on 2009-08-06. Retrieved 2009-09-15.{{cite web}}: CS1 maint: archived copy as title (link)
External links
US 7107442, see Mosaics tab for figures
US 7330986, see Mosaics tab for figures
US 7447757, see Mosaics tab for figures
Fscklog.com: Snow Leopard und 2009er Macs: Wake on WLAN (German, Deutsch)
Macrumors.com: A Closer Look at Snow Leopard's Wake on Demand Feature
opensource.apple.com: Open-source mDNS implementation including the sleep proxy service
Microsoft Research: Sleepless In Seattle No Longer 22 June 2010. Usenix 2010.
Stuart Cheshire has a page describing steps for troubleshooting Sleep Proxy Service
January 07, 2023
bonjour, sleep, proxy, apple, service, open, source, component, zero, configuration, networking, designed, assist, reducing, power, consumption, networked, electronic, devices, device, acting, sleep, proxy, server, will, respond, multicast, queries, another, c. Apple s Bonjour Sleep Proxy service is an open source 1 component of zero configuration networking designed to assist in reducing power consumption of networked electronic devices 2 A device acting as a sleep proxy server will respond to Multicast DNS queries for another compatible device which has gone into low power mode The low power mode device remains asleep while the sleep proxy server responds to Multicast DNS queries 2 When the sleep proxy server sees a query which requires the low power mode device to wake up the sleep proxy server sends a special wake up packet magic packet to the low power mode device Finally communication parameters are updated via Multicast DNS and normal communications proceed 2 Apple refers to the service as Bonjour Sleep Proxy in its support documents 3 The service supports the Wake on Demand feature first offered in Mac OS X Snow Leopard 4 Contents 1 Details 1 1 Address resolution protocol 1 2 Wireless magic packet 1 3 Supported services and examples 2 Implementations 3 References 4 External linksDetails EditAddress resolution protocol Edit The sleep proxy service responds to address resolution protocol requests on behalf of the low power mode device 2 When a sleep proxy sees an IPv4 ARP or IPv6 ND Request for one of the sleeping device s addresses it answers on behalf of the sleeping device without waking it up giving its own MAC address as the current temporary owner of that address This may appear confusing to network administrators who are not expecting the behaviour of changing MAC addresses Wireless magic packet Edit In case the low power mode device is communicating via Wi Fi the wake up packet is sent via Wireless Multimedia Extensions WMM 4 This was not possible in previous implementations of Wake on LAN WoL The wireless hardware must be updated enough to include WMM support 4 Apple provides instructions for checking compatibility with this feature for Macintosh computers 3 Supported services and examples Edit The sleep proxy service is able to advertise any Bonjour supported services while the host computer sleeps Some examples of supported services are 3 File sharing a host supporting the sleep proxy service which offers file services may go to sleep as needed When someone needs to access shared files the host will wake up automatically iTunes library sharing the computer hosting the iTunes library may go to sleep and will automatically wake when someone wishes to browse the iTunes library from a different PC Printer sharing a printer may be connected and shared from a computer supporting sleep proxy service The computer can go to sleep when not in use but will wake when needed to service a print job being sent from a different computer SSH a computer offering SSH access may go to sleep and awaken via the sleep proxy service when an SSH login is initiated Desktop sharing similar to above examples Implementations EditImplementations on a local area network can be seen with Bonjour Browser This list is incomplete you can help by adding missing items April 2009 Apple AirPort Express with firmware version 7 4 1 or 7 4 2 3 Apple AirPort Extreme with firmware version 7 4 1 or 7 4 2 3 Apple AirPort Time Capsule 3 Apple TV all generations HomePod 2018 HomePod mini 2020 Computers running Mac OS X Snow Leopard act as a Bonjour sleep proxy server when Internet sharing is enabled 5 References Edit Note see mDNSResponder source code at www macosforge org which includes a full implementation of the DNS SD mDNS Sleep Proxy Service available under the Apache 2 0 Open Source license a b c d Marc Krochmal 2010 03 23 Internet Draft draft cheshire dnsext multicastdns 11 Apple Inc Retrieved 2010 05 30 a b c d e f Mac OS X v10 6 About Wake on Demand Apple Article HT3774 Apple 2009 08 27 Retrieved 2009 09 15 Setting up Wake on Demand Setting up a Bonjour Sleep Proxy a b c Glenn Fleishman 2009 08 28 Wake on Demand lets Snow Leopard sleep with one eye open Macworld com Archived from the original on 2009 09 16 Retrieved 2009 09 15 How it works Energy Saver preference pane Apple Inc Worldwide Developers Conference WWDC 2009 Session 508 Zero Configuration Networking Using Bonjour Archived copy PDF Archived from the original PDF on 2009 08 06 Retrieved 2009 09 15 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link External links EditUS 7107442 see Mosaics tab for figures US 7330986 see Mosaics tab for figures US 7447757 see Mosaics tab for figures Fscklog com Snow Leopard und 2009er Macs Wake on WLAN German Deutsch Macrumors com A Closer Look at Snow Leopard s Wake on Demand Feature opensource apple com Open source mDNS implementation including the sleep proxy service UC San Diego SleepServer A Software Only Approach for Reducing the Energy Consumption of PCs within Enterprise Environments 22 June 2010 Usenix 2010 Microsoft Research Sleepless In Seattle No Longer 22 June 2010 Usenix 2010 Stuart Cheshire has a page describing steps for troubleshooting Sleep Proxy Service Retrieved from https en wikipedia org w index php title Bonjour Sleep Proxy amp oldid 1093368402, wikipedia, wiki, book, books, library,
