On May 17, at 1:04pm -0700, Archie Cobbs wrote:
> > The question is: how I can initiate smth. like asynchronous reply (so I
> > can get data via NgRecvMsg later in my prgram)? Or I'm going wrong way and
> > should use another scheme for data transfer? Data size ranges from 10Kb to
> > 500Kb.
>
> Whenever you're ready to send the reply, just create one and send it.
It doesn't work. This is fragment of my code:
user-level program:
....
token = NgSendMsg(..., NGM_XXX_SHOW, ...);
/* XXX not reached until ng_xxx_msg() returns */
for(;;) {
...
error = NgRecvMsg(...)
...
}
netgraph node:
/*
* Process control messages
*/
int
ng_xxx_msg()
{
....
case NGM_XXX_SHOW:
error = ng_xxx_show_data()
goto out;
....
out:
....
return (error);
}
/*
* send collected data
*/
int
ng_xxx_show_data()
{
for(;;) {
get_next_data_item();
if (no_more_data)
break;
NG_MKRESPONSE()
error = ng_send_msg()
}
return (error);
}
When size of collected data about 10Kb, all works fine. But when I need to
send 400Kb in reply - oops, ng_xxx_show_data() returns ENOBUFS (I think
because ng_socket receive queue is full, nobody reads from socket). So, I
don't understand how I can transfer large amount of data :-\ Any ideas?
- Roman
---
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