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WebRTC Framework Overview for Application Providers and Media Signaling

This document provides a comprehensive overview of the WebRTC framework, focusing on its application models and signaling mechanisms over HTTP/WebSocket. It covers proprietary and standardized signaling methods, emphasizing the integration of JavaScript and HTML applications. Key topics include media path signaling using ICE/STUN/TURN, management of peer-to-peer connections, codec capabilities, and security concerns such as DDoS attacks and protocol emulation. Additionally, the framework addresses the use of existing communication protocols like SIP and MGCP within the WebRTC architecture.

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WebRTC Framework Overview for Application Providers and Media Signaling

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  1. RTC-Web Framework Jonathan RosenbergChief Technology Strategist, Skype

  2. Base Case (Model 1) ApplicationProvider Proprietary Over HTTP/Websocket Proprietary Over HTTP/Websocket JS/HTMLApp JS/HTMLApp JS API Browser Browser Media + Media PathSignaling (ICE/STUN/TURN)

  3. Base Case (Model 2) ApplicationProvider StandardizedSignaling StandardizedSignaling JS/HTMLApp JS/HTMLApp JS API Browser Browser Media + Media PathSignaling (ICE/STUN/TURN)

  4. API as Protocol CallerJavascript App Provider Web Server CalleeJavascript App Trust Domain Browser Trust Domain JS API JS API CallerBrowser CalleeBrowser Media + Media PathSignaling (ICE/STUN/TURN)

  5. API Scope CallerJavascript P2P Connection Management FW/NAT Traversal Control Codec capabilities and selection Media control Codec control Media security Data Transfer JS API CallerBrowser Media + Media PathSignaling (ICE/STUN/TURN)

  6. Security Problem 1: DDoS CallerJavascript App Provider Web Server MaliciousWebsite App Trust Domain Browser Trust Domain JS API CallerBrowser DDoSTarget Media + Media PathSignaling (ICE/STUN/TURN)

  7. Security Problem 2: Protocol Emulation CallerJavascript App Provider Web Server MaliciousWebsite App Trust Domain Browser Trust Domain JS API CallerBrowser CorporateDNS Server Browser packets emulatingDNS

  8. Provider Interop Case ApplicationProvider 1 ApplicationProvider 1 SIP JS/HTMLApp JS/HTMLApp JS API Browser Browser Media + Media PathSignaling (ICE/STUN/TURN)

  9. Existing Gear Case 1 ApplicationProvider 1 IP PBX SIP JS/HTMLApp SIP,MGCP, H323,Proprietary JS API Browser Media + Media PathSignaling (ICE/STUN/TURN)

  10. Existing Gear Case 2 ApplicationProvider 1 IP PBX SIP Media Gateway JS/HTMLApp SIP,MGCP, H323,Proprietary Browser Media + Media PathSignaling (ICE/STUN/TURN)

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