hi

i am currently working on a package of network_data receiving misc objects for pd. i also first tried to use parts of tcpdump (that is based on the pcap library), yet i stumbled across some difficulties:

• pcap is operated through giving it a callback

function that is triggered if anything conforming the bpf rules passes by and called with a pointer to the packet.

this is in my opinion contradictory to the pd timeslicing approach, since you would have to buffer the data somewhere (in the external). also, libpcap explicitely says, that it might block (in any mode) and it is necessary to give away the focus - so the only plausible solution would be to use threads (in my opinion).

so i programmed the packet handling from scratch, since in my project, buffers should be avoided for response time.

but you may use the pipe_approach if buffering does not matter to you.

martin

On Thu, 25 Apr 2002, Atuc wrote:

hallo,

i found the piperead~ external in the ext13 module, i would like to input data from tcpdump over a streamed-pipe into pd and would like to use a similar module like piperead~ but for control data (not 44100khz sample date).

does somthing like this exist? any better idea how to do? or should i work with the netreceive module?

thanks for help, alexander

martin pi attacksyour.net/pi

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