multiple switchable line disciplines, we now have a single unified
one which changes its behaviour based on option settings. Each
option setting can be suggested by the back end and/or the terminal
handler, and can be forcibly overridden by the configuration. Local
echo and local line editing are separate, independently switchable,
options.
[originally from svn r895]
interfering with X forwarding.)
Details of bug: the event object used as the target of
WSAEventSelect is created in such a way that it is automatically
reset when it releases a thread from WaitFor*Objects. Subsequently,
a read on the first socket in the list causes another network event
if not all the available data was read; thus the event object is set
again. Then, WSAEnumNetworkEvents is called again for the _second_
socket, and is passed the network event, which it therefore resets.
So an event has been dropped, and things only get restarted when
some more data arrives on the first socket.
[originally from svn r888]
advantages:
- protocol modules can call sk_write() without having to worry
about writes blocking, because blocking writes are handled in the
abstraction layer and retried later.
- `Lost connection while sending' is a thing of the past.
- <winsock.h> is no longer needed in most modules, because
"putty.h" doesn't have to declare `SOCKET' variables any more,
only the abstracted `Socket' type.
- select()-equivalent between multiple sockets will now be handled
sensibly, which opens the way for things like SSH port
forwarding.
[originally from svn r744]
use when they have data from the network. Replaces the utterly daft
inbuf / inbuf_head / term_out() interface, which only made sense
when feeding to terminal.c. (terminal.c now implements
from_backend() as a small function that gateways to the old
interface.)
As a side effect, from_backend() also has an `is_stderr' parameter,
so scp can once again separate the server's pronouncements on stderr
from the actual protocol progress on stdout.
[originally from svn r729]
windlg.c into it. Allows plink and pscp to no longer link with
windlg.c, meaning they lose some of the sillier stub functions and
also can provide a console-based form of verify_ssh_host_key().
[originally from svn r683]
Also we are able to notice when a backend is instantly sendok(),
rather than waiting until after the first successful socket read.
(This was zogging raw connections. They're still slightly zogged but
not as badly as they were.)
[originally from svn r671]
