Re: [Lksctp-developers] SCTP Kernel interface - accept

[Sridhar S. <sr...@us...>]

SCTP kernel interfaces are designed to support socket API. I don't think
there is a well defined interface that can be used to access SCTP services
from another kernel module although the routines in net/sctp/socket.c
should be a good starting point.

Take a look at sctp_wait_for_connect(), sctp_wait_for_accept() and
sctp_wait_for_packet() on how we handle non-blocking calls.

sctp_cmd_new_state() should give you some ideas on how you can get
notification on certain state changes.

-Sridhar

On Thu, 30 Sep 2004, Anatoly Khusid wrote:

> Hello,
>
> I am writing a Kernel driver (LiS Streams based) which will sit on top of
> SCTP.
> I am trying to find a way to do non-blocking connect(), accept(), and
> recvmsg().
> For recvmsg() I had some ideas to use sk->data_ready call back function, and
> then do skb_dequeue() to get sk_buff (I would have to do few other things
> done by sctp_recvmsg() ).  I can't se sctp_recvmsg() as it is, I need to get
> sk_buff pointer to avoid memcpy().
>
> But what do I do for accept and connect?  Is there a way to register a call
> back to notify me whenever connect() or accept() is successful?
> What about flow control, how can my kernel module determine if SCTP can't
> keep up with me doing sctp_sendmsg() too fast?
>
>
>
> I have Solaris SCTP Kernel Interface, which answers my questions for
> recvmsg, connect, and accept. Basically it will not block on anything, and
> all of the asynchronous events are notified through call backs.
>
> Is there even a well defined SCTP Linux Kernel interface?  Or you basically
> have to hack into SCTP internals/private interface to get the things you
> want?
>
>
> I appreciate your help and comments.
>
> Anatoly
>
>
>
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