Hi Alessio, Likely to get more helpful eyes on this if you send it to the "GNUnet Developers" mailing list: <[email protected]>
Cheers, Devan Alessio Vanni transcribed 1.9K bytes: > Hello, > > I have a service doing the following: > > * waits for a client to send a specific message > * when the message arrives it opens a CADET channel > * this channel is left open until the client requests it to be closed > * the client sends another specific message > * when the message arrives it is "unpacked" and sent over the channel > * the remote peer replies with some data > * when the data arrives it is "packed" and sent to the client > > I'd like to make the parts where the client waits for the service > "cancelable tasks", i.e. have a "cancel" function that stops any further > operations on the canceled message from being executed. Basically > something like `GNUNET_SCHEDULER_cancel' or what the GNS service > provides. > > I've peeked at the implementation of some of those functions, but there > are few things troubling me (might be because I don't know how the code > works, but still.) > > The first thing I saw was that those tasks use a unique ID embedded in > the message. I tried something like that, but the CADET part doesn't > make it practical, as I'd have to send the ID to the remote peer and > hope that said peer doesn't change its value and/or use it for some > nefarious purpose. > > Ultimately the problem is that I don't have a reliable way to associate > a task with the execution of a certain callback. > > I was hoping someone could provide some help on the matter, especially > since GNUnet has a lot of those cancelable tasks. > > Thank you, > A.V. > > P.S. I tried subscribing to this list, but I can't tell if it succeeded > or not. If it requires a mail confirmation, I didn't get anything after > requesting the subscription. This is actually the second time I tried > and still nothing. In this second attempt it might simply be a late > delivery, but the first time I got nothing and I didn't receive anything > of what was sent to the list afterwards. I can receive mails from other > sources just fine (though it seems some places can't receive from me) so > I really don't know what's going on. >
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