Re: [tuxdroid-user] Small issue with tcp/ip when disconnecting the socket

[neimad <ror...@gm...>]

"David Bourgeois" <da...@ja...> writes:
> But looking into this, I came up with a question about this:
>  if ((send(tcp_clients_handle[i], data, sizeof(tcp_frame_t), 0)) =3D=3D 0)
>             tcp_remove_client(i);
>
> R=C3=A9mi got this in the past if the client was exited without telling to
> the  daemon, 'send' would return 0.
> Looking at the man page, I can't find how send can return 0, at least
> now  in non blocking mode either it adds the data or it returns -1 as
> an error.  But in blocking mode, 0 would mean that 0 bytes have been
> successfully  sent. Any clarification about this?
> I guess that we can change the '=3D=3D 0' into '<=3D 0' or better '< 0' if
> we're  sure 0 can't happen anymore in non-blocking mode.

Unless I'm mistaken, in the current code the sockets are *blocking*.
If send() returns < 0, we can assume the connection to the client has
been closed, yes.

	Damien