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Librecast Privacy and Decentralisation with Multicast IPv6 - - PowerPoint PPT Presentation
Librecast Privacy and Decentralisation with Multicast IPv6 - - PowerPoint PPT Presentation
Librecast Privacy and Decentralisation with Multicast IPv6 Multicast and the Next Generation Internet Brett Sheffield, Librecast Project @brett sheffield #FOSDEM2020 Before we begin... Librecast Librecast Librecast Developers
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Librecast
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Librecast
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Librecast
◮ Developers Developers Developers
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Librecast
◮ Developers Developers Developers ◮ Messaging Library
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Librecast
◮ Developers Developers Developers ◮ Messaging Library ◮ Transitional Technology
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Librecast
◮ Developers Developers Developers ◮ Messaging Library ◮ Transitional Technology ◮ Improved Routing Protocol
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Librecast
◮ Developers Developers Developers ◮ Messaging Library ◮ Transitional Technology ◮ Improved Routing Protocol ◮ Build multicast-enabled applications
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Librecast
◮ Developers Developers Developers ◮ Messaging Library ◮ Transitional Technology ◮ Improved Routing Protocol ◮ Build multicast-enabled applications ◮ Work with FOSS projects to enable multicast everywhere
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Librecast
◮ Developers Developers Developers ◮ Messaging Library ◮ Transitional Technology ◮ Improved Routing Protocol ◮ Build multicast-enabled applications ◮ Work with FOSS projects to enable multicast everywhere ◮ Ensure new standards (eg. WebRTC, QUIC) support multicast
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l c c t x t ∗ ctx ; l c s o c k e t t ∗ sock ; l c c h a n n e l t ∗chan ; l c m e s s a g e t msg ; ctx = l c c t x n e w ( ) ; sock = l c s o c k e t n e w ( ctx ) ; chan = lc channel new ( ctx , channelName ) ; l c c h a n n e l b i n d ( sock , chan ) ; l c m s g i n i t s i z e (&msg , s t r l e n ( msgtext ) − 1 ) ; lc msg send ( chan , &msg ) ; /∗ clean up ∗/ l c s o c k e t c l o s e ( sock ) ; l c c h a n n e l f r e e ( chan ) ; l c c t x f r e e ( ctx ) ;
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Multicast
”IP Multicast will play a prominent role on the Internet in the coming years. It is a requirement, not an option, if the Internet is going to scale. Multicast allows application developers to add more functionality without significantly impacting the network.” – RFC 3170, Sep 2001
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Multicast
Efficient
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Multicast
Scalable
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Multicast
Privacy
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Multicast
Decentralisation
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What is Multicast?
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Definition
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Definition
Unicast
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Definition
Unicast Broadcast
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Definition
Unicast Broadcast Multicast
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Definition
Unicast Broadcast Multicast
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What is Multicast?
Unicast, Broadcast Multicast
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What is Multicast?
Unicast, Broadcast PUSH Multicast
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What is Multicast?
Unicast, Broadcast PUSH Multicast PULL
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Multicast Misconceptions
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Multicast Misconceptions
◮ only for streaming
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Multicast Misconceptions
◮ only for streaming ◮ no use for video on demand
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Multicast Misconceptions
◮ only for streaming ◮ no use for video on demand ◮ unreliable
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Multicast Misconceptions
◮ only for streaming ◮ no use for video on demand ◮ unreliable ◮ insecure
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Multicast Misconceptions
◮ only for streaming ◮ no use for video on demand ◮ unreliable ◮ insecure ◮ can’t work on Internet
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Multicast Misconceptions
◮ only for streaming ◮ no use for video on demand ◮ unreliable ◮ insecure ◮ can’t work on Internet
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Multicast is ...
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Multicast is ... Group Communication
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All Communication is Group Communication
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The Problem with Unicast
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Unicast = ⇒ Centralized
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Multicast = ⇒ Decentralized
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OSI Layer
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Chat
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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Chat Server
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