connections/multistream.svg

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filter="url(#f1t0vpvd8c0val)" style="stroke:#A80036;stroke-width:1.0;"/><path d="M361,144.3125 L361,154.3125 L371,154.3125 L361,144.3125 " fill="#FBFB77" style="stroke:#A80036;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="334" x="22" y="162.8076">Both sides may send initial multistream id simultaneously</text><polygon fill="#A80036" points="67,198.0156,57,202.0156,67,206.0156,63,202.0156" style="stroke:#A80036;stroke-width:1.0;"/><line style="stroke:#A80036;stroke-width:1.0;" x1="61" x2="334" y1="202.0156" y2="202.0156"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="166" x="73" y="197.1592">Send multistream protocol id</text><polygon fill="#A80036" points="323,228.3672,333,232.3672,323,236.3672,327,232.3672" style="stroke:#A80036;stroke-width:1.0;"/><line style="stroke:#A80036;stroke-width:1.0;" x1="56" x2="329" y1="232.3672" y2="232.3672"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="166" x="63" y="227.5107">Send multistream protocol id</text><path d="M26,245.3672 L26,271.3672 L364,271.3672 L364,255.3672 L354,245.3672 L26,245.3672 " fill="#FBFB77" filter="url(#f1t0vpvd8c0val)" style="stroke:#A80036;stroke-width:1.0;"/><path d="M354,245.3672 L354,255.3672 L364,255.3672 L354,245.3672 " fill="#FBFB77" style="stroke:#A80036;stroke-width:1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacing" textLength="309" x="34" y="263.8623">If anything other than multistream id is received, abort</text><rect fill="#EEEEEE" filter="url(#f1t0vpvd8c0val)" height="3" style="stroke:#EEEEEE;stroke-width:1.0;" width="417" x="0" y="301.8945"/><line style="stroke:#000000;stroke-width:1.0;" x1="0" x2="417" y1="301.8945" y2="301.8945"/><line style="stroke:#000000;stroke-width:1.0;" x1="0" x2="417" y1="304.8945" y2="304.8945"/><rect fill="#EEEEEE" filter="url(#f1t0vpvd8c0val)" 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@startuml
skinparam backgroundColor white

entity Initiator
entity Responder
Initiator -> Responder: Open connection

== Establish that both sides support multistream-select ==

note over Initiator, Responder: Both sides may send initial multistream id simultaneously
Responder -> Initiator: Send multistream protocol id
Initiator -> Responder: Send multistream protocol id
note over Initiator, Responder: If anything other than multistream id is received, abort


== Negotiate protocol to use ==


loop until success, or Initiator gives up and closes channel
  Initiator -> Responder: Send protocol id for desired protocol
  alt protocol is supported by Responder
    Responder -> Initiator: Echo back protocol id to indicate agreement
  else protocol is not supported
    Responder -> Initiator: Send "na" (not available)
  end
end

== Use negotiated protocol ==

Initiator -> Responder: Send protocol-specific message
Responder -> Initiator: Send protocol-specific reply

@enduml

PlantUML version 1.2022.0(Tue Jan 11 17:16:42 CET 2022)
(GPL source distribution)
Java Runtime: Java(TM) SE Runtime Environment
JVM: Java HotSpot(TM) 64-Bit Server VM
Default Encoding: Cp1252
Language: de
Country: DE
--></g></svg>