Re: [tipc-discussion] Query : Socket options supported in latest tipc - kernel version 4.18

[Amit J. <ami...@te...>]

Thanks a lot Jon, for detailed clarification.

Regards,
Amit


On Tue, 19 Feb 2019, 20:07 Jon Maloy <jon...@er... wrote:

> Hi Amit,
> There is in reality no change to this.
> Only a few of those options are meaningful for TIPC, since, despite the
> API similarities to TCP, it implementation is very different.
> First, TIPC sockets have no send buffer, so all options related to the
> send buffer (SO_SNDBUF, SO_SNDBUFFORCE , SO_SNDLOWAT and SO_LINGER) are
> irrelevant.
> Likewise, SO_TIMESTAMP, SO_OOBINLINE and SO_MARK , are not supported,
> although the first two possibly could be.
> SO_KEEPALIVE is not needed, since the keepalive time is set indirectly at
> the link level though the 'tipc link set tolerance' command.
> SO_REUSADDR is meaningless, as TIPC sockets per definition already have
> this property (you can bind as many socket you want to an address, just as
> you can bind one socket to many addresses), and setting this will have no
> effect.
>
> The remaining options,  SO_RCV, SO_RCVBUFFORCE , SO_RCVLOWAT,SO_RCVTIMEO
> and SND_TIMEO are supported.
>
> BR
> ///Jon Maloy
>
> > -----Original Message-----
> > From: Amit Jain <ami...@te...>
> > Sent: 15-Feb-19 01:32
> > To: tip...@li...
> > Subject: [tipc-discussion] Query : Socket options supported in latest
> tipc -
> > kernel version 4.18
> >
> > Hi All,
> >
> > We want to understand the socket options supported in tipc (specifically
> for
> > UDP bearers). TIPC supports socket options at 2 different levels -
> > SOL_SOCKET and SOL_TIPC.
> >
> > In the previous document version it was explicitly mentioned  “TIPC does
> not
> > currently support many socket options for level SOL_SOCKET, such as
> > SO_SNDBUF. Options that are supported include SO_RCVTIMEO (for all
> > socket
> > types) and SO_RCVLOWAT (for SOCK_STREAM only)“
> >
> > In the new documentation, there is no such explicit mention. But
> > SO_RCVBUF is explicitly mentioned to be supported at level of SOL_SOCKET.
> > What about the other socket options like -
> >
> > SO_SNDBUF, SO_SNDBUFFORCE , SO_RCVBUFFORCE , SO_KEEPALIVE,
> > SO_REUSEADDR, SO_LINGER, SO_RCVLOWAT and SO_SNDLOWAT,
> > SO_RCVTIMEO and SO_SNDTIMEO, SO_TIMESTAMP, SO_MARK ,
> > SO_OOBINLINE ; Are these applicable for tipc sockets ?
> >
> > Regards,
> >
> > Amit
> >
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