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IRIS and Application Transports

Andrew Newton <andy@hxr.us> CRISP Working Group 58 th IETF, Minneapolis, MN, USA November 12, 2003. IRIS and Application Transports. BEEP. IRIS currently specifies BEEP/TCP (RFC 3080/3081) as the “default” transport. Provides Framing, security framework, versioning, and much more...

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IRIS and Application Transports

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  1. Andrew Newton <andy@hxr.us> CRISP Working Group 58th IETF, Minneapolis, MN, USA November 12, 2003 IRIS and Application Transports

  2. BEEP • IRIS currently specifies BEEP/TCP (RFC 3080/3081) as the “default” transport. • Provides • Framing, security framework, versioning, and much more... • The “full-service” application transport. • Explicitly specified by “iris.beep” URI scheme • Implicit for “iris” URI scheme as the fallback. • This presentation is NOT about replacing BEEP.

  3. The Open Door • Are we allowed to discuss other transports? • From our requirements: • “The protocol MUST define one or more congestion-aware transport mechanisms for mandatory implementation.”

  4. IRIS Transport Design • Iris-core specifically leaves room for more transports: • Nothing in or above the IRIS layer is “stateful” • Session state related to authentication/authorization is purposefully assigned to the application transport layer • Uses S-NAPTR • Specifies how to map additional URI schemes • Etc...

  5. A Survey of Possible Transports • Fast and Light UDP • Straight XML (iris-lwx) • GZIP compressed (iris-lwz) • Tokenized XML (iris-lwb) • Simple TCP-based • Straight XML (iris-tcp) • Secured with SSL/TLS (iris-tls) • HTTP-based • Layered directly on HTTP (iris-http) • SOAP (iris-soap)

  6. Fast and Light UDP • Fast and Light • But... • Does not lend itself towards long messages • Not good for stateful transactions (authorization) • No encryption/confidentiality/other security goodies • However, perfect for situations where no authentication is needed (anonymous access) and results are small.

  7. IRIS-LWZ • Compressed XML over UDP • XML -> GZIP -> UDP • Defines a simple XML wrapper • Profiles (similar to BEEP mechanism) • Client-specified UDP datagram sizes • See draft-newton-iris-lightweight

  8. A Sample IRIS-LWZ Request <lwzRequest • xmlns="urn:ietf:params:xml:ns:iris-lwz" • xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" • serverName="com" length="1280"> • <request xmlns="urn:ietf:params:xml:ns:iris1"> • <searchSet> • <dreg:findDomainsByContact • xmlns:dreg="urn:ietf:params:xml:ns:dreg1"> • <dreg:baseDomain>com</dreg:baseDomain> • <dreg:commonName> • <dreg:beginsWith> • The Cobbler Shoppe • </dreg:beginsWith> • </dreg:commonName> • <dreg:role>registrant</dreg:role> • </dreg:findDomainsByContact> • </searchSet> • </request> • </lwzRequest>

  9. A Sample IRIS-LWZ Response <lwzResponse • xmlns="urn:ietf:params:xml:ns:iris-lwz" • xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> • <response xmlns="urn:ietf:params:xml:ns:iris1"> • <resultSet> • <answer> • <domain • xmlns="urn:ietf:params:xml:ns:dreg1" • authority="com" registryType="dreg1" • entityClass="domain-handle" entityName="tcs-com-1" > • <domainName>thecobblershoppe.com</domainName> • <status> • <assignedAndActive denied="true" /> • </status> • </domain> • </answer> • </resultSet> • </response> • </lwzResponse>

  10. IRIS-LWX & IRIS-LWB • IRIS-LWX • Similar idea to IRIS-LWZ • XML -> UDP • IRIS-LWB • Instead of compression, XML is tokenized with WBXML. • XML Data -> WBXML -> UDP • WBXML can be faster than straight XML • But not namespace aware – simple wrapper may get bigger

  11. Simple TCP-based Transports • Straight layering of IRIS over TCP • XML -> TCP • Simple wrapping similar to iris-lwz • Will remind us of port 43 • Straight layering of IRIS over SSL/TLS • XML -> TLS -> TCP • The same as above, except inserts TLS • But no protocol advantages over BEEP

  12. HTTP-based • Issues with BCP 56 • Direct Layering over HTTP (iris-http) • Sounds simple but it is not • Using SOAP (iris-soap) • Technically not an app-transport • Issues with session semantics • But seemingly very popular • No protocol advantages over BEEP

  13. The Case for UDP • Advantages over BEEP when: • Access is anonymous • Result set can be squeezed into 512 to 1500 bytes • Do we have these situations today? • 95% of queries against whois.verisign-grs.com • 80% of queries against whois.arin.net • 80% of queries against whois.ripe.net • Average answer size of non-recursive answers for whois.nic.de is 1199 bytes

  14. The Case for UDP • Need for very fast domain name check • Many registries are deploying/planning deployment of very fast domain name check service • IRIS over UDP would be perfect for this • Either using 'dreg' • Or with a scaled-down version of 'dreg' like 'dchk'

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