can pipes be used in a network module??

[scanty]

I tried the simple approach.
Ist got rid of write,then got rid of read.

The problem that now surfacing is:
read case :- userspace prog kust keeps on reading even if no packet is being transmitted and when I try to send a packet the read is not executed.

send=0;

in read function()
{
printk("pqr");
wait_event_interruptible(my_queue,send!=1);
printk("stu");
send=0;
.
.
}

in tranmit function ()
{

send=1;
printk("abc");
wake_up_interruptible(&my_queue);
printk("xyz");

}



then in /var/log/messages I see:

pqr
stu
pqr
stu
pqr
stu
pqr
stu
pqr
stu
pqr
stu
pqr
stu

abc
xyz
abc
xyz
abc
xyz


most of the times this is the sequence

same with write.


but when I read first the write then read occurs without any initiation(packet transmission) and userprog blocks on write.

I am using netfilter in my module and seeing packets being in the system without any external packet generation, could it have anything to do with the problem.

[bloggins666]

First thing is to make sure that your transmit function is only activating the queue when a particular event happens. You are going to have to define that event and then use your debugging capabilities (also called "printk()" to prove to yourself that it is working properly and only going off in a deterministic manner. Until you have this working you can't really say that the read/write was or was not working.

Cheers!!