[openssl-users] Query regarding MSG_NOSIGNAL with SSL_Write

[mahesh gs]

On Tue, May 2, 2017 at 2:36 PM, Matt Caswell <matt at openssl.org> wrote:

>
>
> On 02/05/17 06:59, mahesh gs wrote:
> > Hi Matt,
> >
> > Sorry for delayed response. I was on leave.
> >
> > Yes, ours is a library and we do not wish to ignore the signal process
> > wide because the consumer of our library (application) might want to
> > handle the SIGPIPE for there own socket handling.
>
> Could you use pthread_sigmask() to only block SIGPIPE for the current
> thread (perhaps unblocking it again before returning control back to the
> caller of your library)?
>



> Thanks for your suggestion. We will try to adapt this work around.
>
>
> >
> > Thanks,
> > Mahesh G S
> >
> > On Thu, Apr 27, 2017 at 4:36 PM, Matt Caswell <matt at openssl.org
> > <mailto:matt at openssl.org>> wrote:
> >
> >
> >
> >     On 27/04/17 11:56, mahesh gs wrote:
> >     > Hi,
> >     >
> >     > We are using Openssl for establish a secure communications for both
> >     > TCP/SCTP connections.
> >     >
> >     > In our application it is possible that remote end forcefully
> disconnect
> >     > the connection due to which
> >     >
> >     > SSL_Write raises a SIGPIPE which we want to suppress. Does openssl
> >     >
> >     > provide any way to set MSG_NOSIGNAL on sendmsg (Underlying TCP/IP
> socket
> >     > layer) ?
> >
> >     No, there is no option to do that at the moment.
> >
> >     >
> >     > Unfortunately we cannot use "setsockopt" with "SO_NOSIGPIPE"  as
> it is
> >     > not supported by LINUX
> >     >
> >     > and also we are unable to stop the SIGPIPE with function call
> >     > signal(SIGPIPE, SIG_IGN).
> >
> >     Unable because you want SIGPIPE for other areas of your application?
> Or
> >     for some other reason?
> >
> >     Matt
> >     --
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> >
> >
> >
> >
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