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authorBen Lindstrom <mouring@eviladmin.org>2001-03-05 06:16:11 +0000
committerBen Lindstrom <mouring@eviladmin.org>2001-03-05 06:16:11 +0000
commit7fbd455c780e96065dc2bd8d96d21f0c017c0f99 (patch)
tree5e8bf350a8beaec98596e5f680b140006b123a8f
parente9613cf16d72fd78bda7ece0abd7f36c0fb266b6 (diff)
- markus@cvs.openbsd.org 2001/02/28 08:54:55
[channels.c nchan.c nchan.h] make sure remote stderr does not get truncated. remove closed fd's from the select mask.
-rw-r--r--ChangeLog6
-rw-r--r--channels.c57
-rw-r--r--nchan.c57
-rw-r--r--nchan.h4
4 files changed, 82 insertions, 42 deletions
diff --git a/ChangeLog b/ChangeLog
index 36ab623a..a30623c4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -68,6 +68,10 @@
- markus@cvs.openbsd.org 2001/02/28 08:45:39
[clientloop.c]
fix byte counts for ssh protocol v1
+ - markus@cvs.openbsd.org 2001/02/28 08:54:55
+ [channels.c nchan.c nchan.h]
+ make sure remote stderr does not get truncated.
+ remove closed fd's from the select mask.
20010304
- (bal) Remove make-ssh-known-hosts.1 since it's no longer valid.
@@ -4260,4 +4264,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
-$Id: ChangeLog,v 1.871 2001/03/05 06:14:02 mouring Exp $
+$Id: ChangeLog,v 1.872 2001/03/05 06:16:11 mouring Exp $
diff --git a/channels.c b/channels.c
index 71a34510..f10427c1 100644
--- a/channels.c
+++ b/channels.c
@@ -40,7 +40,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: channels.c,v 1.92 2001/02/16 13:38:18 markus Exp $");
+RCSID("$OpenBSD: channels.c,v 1.93 2001/02/28 08:54:55 markus Exp $");
#include <openssl/rsa.h>
#include <openssl/dsa.h>
@@ -824,7 +824,14 @@ channel_handle_efd(Channel *c, fd_set * readset, fd_set * writeset)
buffer_len(&c->extended));
debug2("channel %d: written %d to efd %d",
c->self, len, c->efd);
- if (len > 0) {
+ if (len < 0 && (errno == EINTR || errno == EAGAIN))
+ return 1;
+ if (len <= 0) {
+ debug2("channel %d: closing write-efd %d",
+ c->self, c->efd);
+ close(c->efd);
+ c->efd = -1;
+ } else {
buffer_consume(&c->extended, len);
c->local_consumed += len;
}
@@ -833,19 +840,22 @@ channel_handle_efd(Channel *c, fd_set * readset, fd_set * writeset)
len = read(c->efd, buf, sizeof(buf));
debug2("channel %d: read %d from efd %d",
c->self, len, c->efd);
- if (len == 0) {
- debug("channel %d: closing efd %d",
+ if (len < 0 && (errno == EINTR || errno == EAGAIN))
+ return 1;
+ if (len <= 0) {
+ debug2("channel %d: closing read-efd %d",
c->self, c->efd);
close(c->efd);
c->efd = -1;
- } else if (len > 0)
+ } else {
buffer_append(&c->extended, buf, len);
+ }
}
}
return 1;
}
int
-channel_check_window(Channel *c, fd_set * readset, fd_set * writeset)
+channel_check_window(Channel *c)
{
if (!(c->flags & (CHAN_CLOSE_SENT|CHAN_CLOSE_RCVD)) &&
c->local_window < c->local_window_max/2 &&
@@ -876,7 +886,8 @@ channel_post_open_2(Channel *c, fd_set * readset, fd_set * writeset)
channel_handle_rfd(c, readset, writeset);
channel_handle_wfd(c, readset, writeset);
channel_handle_efd(c, readset, writeset);
- channel_check_window(c, readset, writeset);
+
+ channel_check_window(c);
}
void
@@ -984,7 +995,24 @@ channel_handler(chan_fn *ftab[], fd_set * readset, fd_set * writeset)
if (ftab[c->type] == NULL)
continue;
(*ftab[c->type])(c, readset, writeset);
- chan_delete_if_full_closed(c);
+ if (chan_is_dead(c)) {
+ /*
+ * we have to remove the fd's from the select mask
+ * before the channels are free'd and the fd's are
+ * closed
+ */
+ if (c->wfd != -1)
+ FD_CLR(c->wfd, writeset);
+ if (c->rfd != -1)
+ FD_CLR(c->rfd, readset);
+ if (c->efd != -1) {
+ if (c->extended_usage == CHAN_EXTENDED_READ)
+ FD_CLR(c->efd, readset);
+ if (c->extended_usage == CHAN_EXTENDED_WRITE)
+ FD_CLR(c->efd, writeset);
+ }
+ channel_free(c->self);
+ }
}
}
@@ -1037,19 +1065,18 @@ channel_output_poll()
} else {
if (c->type != SSH_CHANNEL_OPEN)
continue;
- if (c->istate != CHAN_INPUT_OPEN &&
- c->istate != CHAN_INPUT_WAIT_DRAIN)
- continue;
}
if (compat20 &&
(c->flags & (CHAN_CLOSE_SENT|CHAN_CLOSE_RCVD))) {
+ /* XXX is this true? */
debug("channel: %d: no data after CLOSE", c->self);
continue;
}
/* Get the amount of buffered data for this channel. */
- len = buffer_len(&c->input);
- if (len > 0) {
+ if ((c->istate == CHAN_INPUT_OPEN ||
+ c->istate == CHAN_INPUT_WAIT_DRAIN) &&
+ (len = buffer_len(&c->input)) > 0) {
/* Send some data for the other side over the secure connection. */
if (compat20) {
if (len > c->remote_window)
@@ -1089,6 +1116,9 @@ channel_output_poll()
c->remote_window > 0 &&
(len = buffer_len(&c->extended)) > 0 &&
c->extended_usage == CHAN_EXTENDED_READ) {
+ debug2("channel %d: rwin %d elen %d euse %d",
+ c->self, c->remote_window, buffer_len(&c->extended),
+ c->extended_usage);
if (len > c->remote_window)
len = c->remote_window;
if (len > c->remote_maxpacket)
@@ -1100,6 +1130,7 @@ channel_output_poll()
packet_send();
buffer_consume(&c->extended, len);
c->remote_window -= len;
+ debug2("channel %d: sent ext data %d", c->self, len);
}
}
}
diff --git a/nchan.c b/nchan.c
index 6c347203..d91217e5 100644
--- a/nchan.c
+++ b/nchan.c
@@ -23,7 +23,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: nchan.c,v 1.22 2001/01/21 19:05:52 markus Exp $");
+RCSID("$OpenBSD: nchan.c,v 1.23 2001/02/28 08:54:55 markus Exp $");
#include "ssh1.h"
#include "ssh2.h"
@@ -54,9 +54,6 @@ static void chan_send_oclose1(Channel *c);
static void chan_send_close2(Channel *c);
static void chan_send_eof2(Channel *c);
-/* channel cleanup */
-chan_event_fn *chan_delete_if_full_closed = NULL;
-
/* helper */
static void chan_shutdown_write(Channel *c);
static void chan_shutdown_read(Channel *c);
@@ -249,16 +246,6 @@ chan_send_oclose1(Channel *c)
break;
}
}
-static void
-chan_delete_if_full_closed1(Channel *c)
-{
- debug3("channel %d: chan_delete_if_full_closed1: istate %d ostate %d",
- c->self, c->istate, c->ostate);
- if (c->istate == CHAN_INPUT_CLOSED && c->ostate == CHAN_OUTPUT_CLOSED) {
- debug("channel %d: full closed", c->self);
- channel_free(c->self);
- }
-}
/*
* the same for SSH2
@@ -401,24 +388,46 @@ chan_send_close2(Channel *c)
c->flags |= CHAN_CLOSE_SENT;
}
}
-static void
-chan_delete_if_full_closed2(Channel *c)
+
+/* shared */
+
+int
+chan_is_dead(Channel *c)
{
- debug3("channel %d: chan_delete_if_full_closed2: istate %d ostate %d",
- c->self, c->istate, c->ostate);
- if (c->istate == CHAN_INPUT_CLOSED && c->ostate == CHAN_OUTPUT_CLOSED) {
+ if (c->istate != CHAN_INPUT_CLOSED || c->ostate != CHAN_OUTPUT_CLOSED)
+ return 0;
+ if (!compat20) {
+ debug("channel %d: is dead", c->self);
+ return 1;
+ }
+ /*
+ * we have to delay the close message if the efd (for stderr) is
+ * still active
+ */
+ if (((c->extended_usage != CHAN_EXTENDED_IGNORE) &&
+ buffer_len(&c->extended) > 0)
+#if 0
+ || ((c->extended_usage == CHAN_EXTENDED_READ) &&
+ c->efd != -1)
+#endif
+ ) {
+ debug2("channel %d: active efd: %d len %d type %s",
+ c->self, c->efd, buffer_len(&c->extended),
+ c->extended_usage==CHAN_EXTENDED_READ ?
+ "read": "write");
+ } else {
if (!(c->flags & CHAN_CLOSE_SENT)) {
chan_send_close2(c);
}
if ((c->flags & CHAN_CLOSE_SENT) &&
(c->flags & CHAN_CLOSE_RCVD)) {
- debug("channel %d: full closed2", c->self);
- channel_free(c->self);
+ debug("channel %d: is dead", c->self);
+ return 1;
}
}
+ return 0;
}
-/* shared */
void
chan_init_iostates(Channel *c)
{
@@ -439,8 +448,6 @@ chan_init(void)
chan_rcvd_ieof = chan_rcvd_ieof2;
chan_write_failed = chan_write_failed2;
chan_obuf_empty = chan_obuf_empty2;
-
- chan_delete_if_full_closed = chan_delete_if_full_closed2;
} else {
chan_rcvd_oclose = chan_rcvd_oclose1;
chan_read_failed = chan_read_failed_12;
@@ -449,8 +456,6 @@ chan_init(void)
chan_rcvd_ieof = chan_rcvd_ieof1;
chan_write_failed = chan_write_failed1;
chan_obuf_empty = chan_obuf_empty1;
-
- chan_delete_if_full_closed = chan_delete_if_full_closed1;
}
}
diff --git a/nchan.h b/nchan.h
index 366b894a..623ecccc 100644
--- a/nchan.h
+++ b/nchan.h
@@ -22,7 +22,7 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-/* RCSID("$OpenBSD: nchan.h,v 1.9 2000/09/07 20:27:52 deraadt Exp $"); */
+/* RCSID("$OpenBSD: nchan.h,v 1.10 2001/02/28 08:54:55 markus Exp $"); */
#ifndef NCHAN_H
#define NCHAN_H
@@ -84,7 +84,7 @@ extern chan_event_fn *chan_rcvd_ieof;
extern chan_event_fn *chan_write_failed;
extern chan_event_fn *chan_obuf_empty;
-extern chan_event_fn *chan_delete_if_full_closed;
+int chan_is_dead(Channel * c);
void chan_init_iostates(Channel * c);
void chan_init(void);