github
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putty
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putty/noshare.c

26 строки
581 B
C
Исходник Обычный вид История

Implement connection sharing between instances of PuTTY. The basic strategy is described at the top of the new source file sshshare.c. In very brief: an 'upstream' PuTTY opens a Unix-domain socket or Windows named pipe, and listens for connections from other PuTTYs wanting to run sessions on the same server. The protocol spoken down that socket/pipe is essentially the bare ssh-connection protocol, using a trivial binary packet protocol with no encryption, and the upstream has to do some fiddly transformations that I've been referring to as 'channel-number NAT' to avoid resource clashes between the sessions it's managing. This is quite different from OpenSSH's approach of using the Unix- domain socket as a means of passing file descriptors around; the main reason for that is that fd-passing is Unix-specific but this system has to work on Windows too. However, there are additional advantages, such as making it easy for each downstream PuTTY to run its own independent set of port and X11 forwardings (though the method for making the latter work is quite painful). Sharing is off by default, but configuration is intended to be very easy in the normal case - just tick one box in the SSH config panel and everything else happens automatically. [originally from svn r10083]
2013-11-17 18:05:41 +04:00
/*
* Stub implementation of SSH connection-sharing IPC, for any
* platform which can't support it at all.
*/
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include "tree234.h"
#include "putty.h"
#include "ssh.h"
#include "network.h"
int platform_ssh_share(const char *name, Conf *conf,
Plug downplug, Plug upplug, Socket *sock,
Fix the prototype of the stub function in noshare.c. It's an old prototype from part way through the development of connection sharing, which I must have forgotten to fix because by the time I changed the prototype no platform was using noshare.c any more. [originally from svn r10183]
2014-04-22 21:53:50 +04:00
char **logtext, char **ds_err, char **us_err,
int can_upstream, int can_downstream)
Implement connection sharing between instances of PuTTY. The basic strategy is described at the top of the new source file sshshare.c. In very brief: an 'upstream' PuTTY opens a Unix-domain socket or Windows named pipe, and listens for connections from other PuTTYs wanting to run sessions on the same server. The protocol spoken down that socket/pipe is essentially the bare ssh-connection protocol, using a trivial binary packet protocol with no encryption, and the upstream has to do some fiddly transformations that I've been referring to as 'channel-number NAT' to avoid resource clashes between the sessions it's managing. This is quite different from OpenSSH's approach of using the Unix- domain socket as a means of passing file descriptors around; the main reason for that is that fd-passing is Unix-specific but this system has to work on Windows too. However, there are additional advantages, such as making it easy for each downstream PuTTY to run its own independent set of port and X11 forwardings (though the method for making the latter work is quite painful). Sharing is off by default, but configuration is intended to be very easy in the normal case - just tick one box in the SSH config panel and everything else happens automatically. [originally from svn r10083]
2013-11-17 18:05:41 +04:00
{
return SHARE_NONE;
}
void platform_ssh_share_cleanup(const char *name)
{
}