Sorry for the very bad Subject line. Thank you Mutt :). David On 30 Apr (15:59:23), David Goulet wrote: > On 30 Apr (12:06:31), marziyeh latifi wrote: > > Hello, > > I have two questions about SENDME cell in TOR: > > Is SENDME a Control cell or a Relay cell? > > A SENDME cell is a control cell. See: > > https://gitweb.torproject.org/torspec.git/tree/tor-spec.txt#n1531 > > However, SENDME exists at the stream level which affects only a specific > stream within the circuit and thus their StreamID will be non zero which > explains the "sometimes" in the spec. > > > Which node does interpret SENDME cells?The node that receives them or the > > edge node(client/exit)? > > SENDMEs are always end-to-end so only the end points interpret them. > > For example, when a client starts a download of a large file from an Exit > node, the Exit will send some data (up to what we call the circuit window > size) and wait for a SENDME cell _from_ the client to send more. In order > word, the client sends the SENDME towards the Exit to tell it "please send me > more data". > > Now, if the client uploads data to the Exit, this is reverse where the Exit > will send a SENDME when it is ready to receive more data. > > All this is managed by the package and delivery window maintained at each end > points. See Section 7 of torspec.txt for more details. > > Cheers! > David > > -- > 71kN/ro+ccyP6zH5RukUX1TNXn7KjZ+E8ffp3xaYOzg= > _______________________________________________ > tor-relays mailing list > tor-relays@xxxxxxxxxxxxxxxxxxxx > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays -- 71kN/ro+ccyP6zH5RukUX1TNXn7KjZ+E8ffp3xaYOzg=
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