[openssl-users] Query regarding MSG_NOSIGNAL with SSL_Write

[Wouter Verhelst]

On 27-04-17 12:56, 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) ?
> 
> Unfortunately we cannot use "setsockopt" with "SO_NOSIGPIPE"  as it is
> not supported by LINUX 

You want to set the socket to nonblocking:

flags = fcntl(socket, F_GETFL, 0);
flags |= O_NONBLOCK
fcntl(socket, F_SETFL, flags);

(You'll need to add error checking for the fcntl() calls)

-- 
Wouter Verhelst