try to fix agent-forwarding-backconnection-bug, as seen on HPUX, for example;

with Lutz.Jaenicke@aet.TU-Cottbus.DE,

3 files changed, 19 insertions, 3 deletions

diff --git a/usr.bin/ssh/channels.c b/usr.bin/ssh/channels.c
index 8b5612d1df2..5c75f556a4f 100644
--- a/usr.bin/ssh/channels.c
+++ b/usr.bin/ssh/channels.c
@@ -39,7 +39,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: channels.c,v 1.132 2001/07/17 21:04:56 markus Exp $");
+RCSID("$OpenBSD: channels.c,v 1.133 2001/09/17 20:52:47 markus Exp $");
 
 #include "ssh.h"
 #include "ssh1.h"
@@ -260,6 +260,7 @@ channel_new(char *ctype, int type, int rfd, int wfd, int efd,
 	c->cb_fn = NULL;
 	c->cb_arg = NULL;
 	c->cb_event = 0;
+	c->force_drain = 0;
 	c->detach_user = NULL;
 	c->input_filter = NULL;
 	debug("channel %d: new [%s]", found, remote_name);
@@ -874,6 +875,9 @@ static void
 channel_pre_x11_open(Channel *c, fd_set * readset, fd_set * writeset)
 {
 	int ret = x11_open_helper(&c->output);
+
+	/* c->force_drain = 1; */
+
 	if (ret == 1) {
 		c->type = SSH_CHANNEL_OPEN;
 		if (compat20)
@@ -1781,6 +1785,13 @@ channel_input_ieof(int type, int plen, void *ctxt)
 	if (c == NULL)
 		packet_disconnect("Received ieof for nonexistent channel %d.", id);
 	chan_rcvd_ieof(c);
+
+	/* XXX force input close */
+	if (c->force_drain) {
+		debug("channel %d: FORCE input drain", c->self);
+		c->istate = CHAN_INPUT_WAIT_DRAIN;
+	}
+
 }
 
 void
@@ -2612,6 +2623,7 @@ x11_input_open(int type, int plen, void *ctxt)
 			close(sock);
 		} else {
 			c->remote_id = remote_id;
+			c->force_drain = 1;
 		}
 	}
 	if (c == NULL) {
@@ -2874,6 +2886,7 @@ auth_input_open_request(int type, int plen, void *ctxt)
 			close(sock);
 		} else {
 			c->remote_id = remote_id;
+			c->force_drain = 1;
 		}
 	}
 	if (c == NULL) {
diff --git a/usr.bin/ssh/channels.h b/usr.bin/ssh/channels.h
index 2ee1496c789..a1300483894 100644
--- a/usr.bin/ssh/channels.h
+++ b/usr.bin/ssh/channels.h
@@ -32,7 +32,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-/* RCSID("$OpenBSD: channels.h,v 1.45 2001/07/17 21:04:57 markus Exp $"); */
+/* RCSID("$OpenBSD: channels.h,v 1.46 2001/09/17 20:52:47 markus Exp $"); */
 
 #ifndef CHANNEL_H
 #define CHANNEL_H
@@ -77,6 +77,7 @@ struct Channel {
 	int     efd;		/* extended fd */
 	int     sock;		/* sock fd */
 	int     isatty;		/* rfd is a tty */
+	int     force_drain;		/* force close on iEOF */
 	Buffer  input;		/* data read from socket, to be sent over
 				 * encrypted connection */
 	Buffer  output;		/* data received over encrypted connection for
diff --git a/usr.bin/ssh/clientloop.c b/usr.bin/ssh/clientloop.c
index 41aff8354e9..e6da67d51a0 100644
--- a/usr.bin/ssh/clientloop.c
+++ b/usr.bin/ssh/clientloop.c
@@ -59,7 +59,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: clientloop.c,v 1.81 2001/07/17 21:04:57 markus Exp $");
+RCSID("$OpenBSD: clientloop.c,v 1.82 2001/09/17 20:52:47 markus Exp $");
 
 #include "ssh.h"
 #include "ssh1.h"
@@ -1111,6 +1111,7 @@ client_request_x11(const char *request_type, int rchan)
 		error("client_request_x11: channel_new failed");
 		close(sock);
 	}
+	c->force_drain = 1;
 	return c;
 }
 
@@ -1136,6 +1137,7 @@ client_request_agent(const char *request_type, int rchan)
 		error("client_request_agent: channel_new failed");
 		close(sock);
 	}
+	c->force_drain = 1;
 	return c;
 }