For trimming an incoming message, the very beginning of in_event looks
like the right place.
For prepending an outgoing message, I would guess out_event just at the
beginning of the if (!outsize) block. But I am not sure.
What is the granularity of what is written with out_event / int nbytes =
write (outpos, outsize); , frame ? message ? several message possible ?
part of a frame possible ?
Le 17/01/2014 11:40, Laurent Alebarde a écrit :
Hi Devs,
I am doing some experiments (cf at the end for the goal) and wonder
where I could hook the beginning of a message both reading and writing.
What I want to do is prepend an outgoing message and trim an incoming
message (for any mechanism looks simpler) when some option is set.
Typically, when the option is set, when a new message is received, I
want to be able to store a certain amount of the first bytes in a new
mechanism buffer, and skip them. These bytes are experimental and not
ZMTP, so I have to skip or trim them to not hurt ZMTP. When a message
is sent, I want to initialise the buffer with a copy of what I
previously stored before ZMTP write the buffer. If it is outpos, I
will do outpos += store_size;
So, the question is where & when I should do that to not hurt ZMTP.
FYI, The aim of this experiment is to manage to achieve CURVE
proxying. My investigations and tests so far lead me to prepend the
client ID in every message sent to the CURVE worker, and that the
worker send back this information.
Cheers,
Laurent
_______________________________________________
zeromq-dev mailing list
[email protected]
http://lists.zeromq.org/mailman/listinfo/zeromq-dev
_______________________________________________
zeromq-dev mailing list
[email protected]
http://lists.zeromq.org/mailman/listinfo/zeromq-dev
