TCP max segment size

[Brieuc Jeunhomme]

Hi,

looking at the net package of the standard library, I don't see a way to set the tcp max segment size.  Surely, one can create a tcp connection manually and set the segment size by using the syscall package, but that approach prevents them from reusing higher level packages that want a net.Dialer, for example crypto/tls.  So in short, to create a tls connection in golang and set its TCP MSS, one has to reimplement tls, unless I missed something.

Would it make sense to have a dialer field for the MSS?

[Sean Liao]

net.TCPConn.SyscallConn exposes the fd which you can use with sycalls

[Brieuc Jeunhomme]

Thank you for your answer.  In case someone else is interested, the answer I was looking for was: the Dialer struct has an optional Control member, that the user can set.  It's a a function that will be called before the connect() syscall is issued, allowing to set whatever socket options before issuing the tcp connection.