future of subsystem requests

[Markus Friedl]

On Mon, May 22, 2000 at 11:15:59AM -0700, Paul Heinlein wrote:
> I was testing the Linux port of 2.1.0p2 and noticed that the F-Secure SSH
> client for Windows 4.0 couldn't successfully connect using its secure
> file-transfer facility.

SFTP is a proprietary protocol, but feel free to re-engineer it :)
it is not related to SSH at all.

>   int
>   session_subsystem_req(Session *s)
>   {
>       unsigned int len;
>       int success = 0;
>       char *subsys = packet_get_string(&len);
> 
>       packet_done();
>       log("subsystem request for %s", subsys);
> 
>       xfree(subsys);
>       return success;
>   }
> 
> To my eyes, this looks like a planned no-op. Markus Friedl earlier 
> reported that, as of late April, sftp was still on the to-do list. What

SFTP is not a top priority. SecureFX works fine with OpenSSH.

> about the future (or lack thereof) of an OpenSSH subsystem facility in
> general?

subsystem support is almost complete, you can try this patch if you want to test:

Index: session.c
===================================================================
RCS file: /home/markus/cvs/ssh/session.c,v
retrieving revision 1.12
diff -u -r1.12 session.c
--- session.c	2000/05/03 18:03:07	1.12
+++ session.c	2000/05/18 19:18:53
@@ -1203,6 +1214,14 @@
 	packet_done();
 	log("subsystem request for %s", subsys);
 
+#define SFTPSERVER "/path/to/ssh/com/source/sftp-server2"
+#ifdef SFTPSERVER
+	if (strcmp(subsys, "sftp") == 0) {
+		debug("subsystem: exec() " SFTPSERVER);
+		do_exec_no_pty(s, SFTPSERVER, s->pw);
+		success = 1;
+	}
+#endif
 	xfree(subsys);
 	return success;
 }

-markus