🚀 go-pugleaf

hello,

I'm trying to write a program in which some processes exchange packets and 
messages, but I have 'some' difficulties...

I would simulate a network, each process represents a machine and a particular
process represents the net.

I use pipes to let the machine communicate, who wants to send a packet puts it
in the first pipe, the PipeMaster process gets it and puts it in a second pipe
 taking care that no two packets be in the second pipe at the same time,
so , when he puts the packet in the pipe 2, he sends a signal to the destinationprocess ( kill(PID[dest],PACKET_SENT) ), when the destination gets the packet
from the pipe , it sends a signal to the PipeMaster process ( kill(PipeMasterID, PACKET_RECEIVED) ) so that the PipeMaster can get another packet from the first pipe and put in the second, and so on...

The main problem is the PID[] array and the PipeMasterID, which are the 
process id's,  i.e. when i do

	...
	pr = fork();
	if(pr==0) Machine(i);
	PID[i++]=pr;
	...

the fork() duplicates the array
so the child process doesn't know PID[j] for j>i ..

so if PipeMaster() is `forked` before than the other machines, it doesn't know
the other processes id, if it is forked as last, the other processes cannot signal the 'PACKET_RECEIVED' cause they don't know the PipeMaster id.

My question is: Is there any easy way to let two processes communicate ?

Any suggest is accepted...

P.S. Please answer on this newsgroup, as I can't receive mail on my host.

Thanks in Advance,

	Fabio Lopiano	   

	Dipartimento di Informatica
	Universita' di Pisa (Italy)