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- markus@cvs.openbsd.org 2008/05/09 16:21:13 

[channels.h clientloop.c nchan.c serverloop.c]
     unbreak
        ssh -2 localhost od /bin/ls | true
     ignoring SIGPIPE by adding a new channel message (EOW) that signals
     the peer that we're not interested in any data it might send.
     fixes bz #85; discussion, debugging and ok djm@
This commit is contained in:
Damien Miller 2008-05-19 16:06:47 +10:00
parent d654dd27b5
commit bab9bd4c20
5 changed files with 48 additions and 6 deletions
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9
ChangeLog
View File

@ -133,6 +133,13 @@
for channels with both in- and output closed, since the channel
will go away before we call select();
report, lots of debugging help and ok djm@
- markus@cvs.openbsd.org 2008/05/09 16:21:13
[channels.h clientloop.c nchan.c serverloop.c]
unbreak
ssh -2 localhost od /bin/ls | true
ignoring SIGPIPE by adding a new channel message (EOW) that signals
the peer that we're not interested in any data it might send.
fixes bz #85; discussion, debugging and ok djm@
20080403
- (djm) [openbsd-compat/bsd-poll.c] Include stdlib.h to avoid compile-
@ -3993,4 +4000,4 @@
OpenServer 6 and add osr5bigcrypt support so when someone migrates
passwords between UnixWare and OpenServer they will still work. OK dtucker@
$Id: ChangeLog,v 1.4929 2008/05/19 06:05:41 djm Exp $
$Id: ChangeLog,v 1.4930 2008/05/19 06:06:47 djm Exp $

3
channels.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: channels.h,v 1.91 2008/05/09 04:55:56 djm Exp $ */
/* $OpenBSD: channels.h,v 1.92 2008/05/09 16:21:13 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -267,6 +267,7 @@ void chan_mark_dead(Channel *);
/* channel events */
void chan_rcvd_oclose(Channel *);
void chan_rcvd_eow(Channel *); /* SSH2-only */
void chan_read_failed(Channel *);
void chan_ibuf_empty(Channel *);

5
clientloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.c,v 1.192 2008/05/09 14:18:44 djm Exp $ */
/* $OpenBSD: clientloop.c,v 1.193 2008/05/09 16:21:13 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -1666,6 +1666,9 @@ client_input_channel_req(int type, u_int32_t seq, void *ctxt)
error("client_input_channel_req: request for channel -1");
} else if ((c = channel_lookup(id)) == NULL) {
error("client_input_channel_req: channel %d: unknown channel", id);
} else if (strcmp(rtype, "eow@openssh.com") == 0) {
packet_check_eom();
chan_rcvd_eow(c);
} else if (strcmp(rtype, "exit-status") == 0) {
exitval = packet_get_int();
if (id == session_ident) {

30
nchan.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: nchan.c,v 1.58 2008/05/08 12:02:23 djm Exp $ */
/* $OpenBSD: nchan.c,v 1.59 2008/05/09 16:21:13 markus Exp $ */
/*
* Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved.
*
@ -78,6 +78,7 @@ static void chan_send_ieof1(Channel *);
static void chan_send_oclose1(Channel *);
static void chan_send_close2(Channel *);
static void chan_send_eof2(Channel *);
static void chan_send_eow2(Channel *);
/* helper */
static void chan_shutdown_write(Channel *);
@ -306,6 +307,17 @@ chan_rcvd_close2(Channel *c)
break;
}
}
void
chan_rcvd_eow(Channel *c)
{
debug2("channel %d: rcvd eow", c->self);
switch (c->istate) {
case CHAN_INPUT_OPEN:
chan_shutdown_read(c);
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
}
}
static void
chan_rcvd_eof2(Channel *c)
{
@ -322,6 +334,7 @@ chan_write_failed2(Channel *c)
case CHAN_OUTPUT_OPEN:
case CHAN_OUTPUT_WAIT_DRAIN:
chan_shutdown_write(c);
chan_send_eow2(c);
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
@ -364,6 +377,21 @@ chan_send_close2(Channel *c)
c->flags |= CHAN_CLOSE_SENT;
}
}
static void
chan_send_eow2(Channel *c)
{
debug2("channel %d: send eow", c->self);
if (c->ostate == CHAN_OUTPUT_CLOSED) {
error("channel %d: must not sent eow on closed output",
c->self);
return;
}
packet_start(SSH2_MSG_CHANNEL_REQUEST);
packet_put_int(c->remote_id);
packet_put_cstring("eow@openssh.com");
packet_put_char(0);
packet_send();
}
/* shared */

7
serverloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: serverloop.c,v 1.150 2008/05/09 04:55:56 djm Exp $ */
/* $OpenBSD: serverloop.c,v 1.151 2008/05/09 16:21:13 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -1160,7 +1160,10 @@ server_input_channel_req(int type, u_int32_t seq, void *ctxt)
if ((c = channel_lookup(id)) == NULL)
packet_disconnect("server_input_channel_req: "
"unknown channel %d", id);
if (c->type == SSH_CHANNEL_LARVAL || c->type == SSH_CHANNEL_OPEN)
if (!strcmp(rtype, "eow@openssh.com")) {
packet_check_eom();
chan_rcvd_eow(c);
} else if (c->type == SSH_CHANNEL_LARVAL || c->type == SSH_CHANNEL_OPEN)
success = session_input_channel_req(c, rtype);
if (reply) {
packet_start(success ?