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- djm@cvs.openbsd.org 2008/07/02 13:47:39

Browse Source 
[ssh.1 ssh.c]
     When forking after authentication ("ssh -f") with ExitOnForwardFailure
     enabled, delay the fork until after replies for any -R forwards have
     been seen. Allows for robust detection of -R forward failure when
     using -f (similar to bz#92); ok dtucker@
This commit is contained in:
Darren Tucker 2008-07-04 12:53:50 +10:00
parent 7c99b1ceda
commit 9a2a60986b
3 changed files with 39 additions and 9 deletions
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8
ChangeLog
View File

@ -3,6 +3,12 @@
- djm@cvs.openbsd.org 2008/07/02 13:30:34
[auth2.c]
really really remove the freebie "none" auth try for protocol 2
- djm@cvs.openbsd.org 2008/07/02 13:47:39
[ssh.1 ssh.c]
When forking after authentication ("ssh -f") with ExitOnForwardFailure
enabled, delay the fork until after replies for any -R forwards have
been seen. Allows for robust detection of -R forward failure when
using -f (similar to bz#92); ok dtucker@
20080702
- (dtucker) OpenBSD CVS Sync
@ -4538,4 +4544,4 @@
OpenServer 6 and add osr5bigcrypt support so when someone migrates
passwords between UnixWare and OpenServer they will still work. OK dtucker@
$Id: ChangeLog,v 1.5049 2008/07/04 02:53:23 dtucker Exp $
$Id: ChangeLog,v 1.5050 2008/07/04 02:53:50 dtucker Exp $

13
ssh.1
View File

@ -34,8 +34,8 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $OpenBSD: ssh.1,v 1.276 2008/06/26 21:11:46 jmc Exp $
.Dd $Mdocdate: June 26 2008 $
.\" $OpenBSD: ssh.1,v 1.277 2008/07/02 13:47:39 djm Exp $
.Dd $Mdocdate: July 2 2008 $
.Dt SSH 1
.Os
.Sh NAME
@ -290,6 +290,15 @@ This implies
The recommended way to start X11 programs at a remote site is with
something like
.Ic ssh -f host xterm .
.Pp
If the
.Cm ExitOnForwardFailure
configuration option is set to
.Dq yes ,
then a client started with
.Fl f
will wait for all remote port forwards to be successfully established
before placing itself in the background.
.It Fl g
Allows remote hosts to connect to local forwarded ports.
.It Fl I Ar smartcard_device

27
ssh.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh.c,v 1.317 2008/06/12 16:35:31 dtucker Exp $ */
/* $OpenBSD: ssh.c,v 1.318 2008/07/02 13:47:39 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -860,9 +860,15 @@ ssh_confirm_remote_forward(int type, u_int32_t seq, void *ctxt)
logit("Warning: remote port forwarding failed for "
"listen port %d", rfwd->listen_port);
}
if (++remote_forward_confirms_received == options.num_remote_forwards)
if (++remote_forward_confirms_received == options.num_remote_forwards) {
debug("All remote forwarding requests processed");
/* XXX fork-after-authentication */
if (fork_after_authentication_flag) {
fork_after_authentication_flag = 0;
if (daemon(1, 1) < 0)
fatal("daemon() failed: %.200s",
strerror(errno));
}
}
}
static void
@ -1062,10 +1068,17 @@ ssh_session(void)
options.permit_local_command)
ssh_local_cmd(options.local_command);
/* If requested, let ssh continue in the background. */
if (fork_after_authentication_flag)
/*
* If requested and we are not interested in replies to remote
* forwarding requests, then let ssh continue in the background.
*/
if (fork_after_authentication_flag &&
(!options.exit_on_forward_failure ||
options.num_remote_forwards == 0)) {
fork_after_authentication_flag = 0;
if (daemon(1, 1) < 0)
fatal("daemon() failed: %.200s", strerror(errno));
}
/*
* If a command was specified on the command line, execute the
@ -1204,9 +1217,11 @@ ssh_session2(void)
muxserver_listen();
/* If requested, let ssh continue in the background. */
if (fork_after_authentication_flag)
if (fork_after_authentication_flag) {
fork_after_authentication_flag = 0;
if (daemon(1, 1) < 0)
fatal("daemon() failed: %.200s", strerror(errno));
}
return client_loop(tty_flag, tty_flag ?
options.escape_char : SSH_ESCAPECHAR_NONE, id);