mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-11-23 18:23:25 +08:00
- djm@cvs.openbsd.org 2008/05/08 12:02:23
[auth-options.c auth1.c channels.c channels.h clientloop.c gss-serv.c]
[monitor.c monitor_wrap.c nchan.c servconf.c serverloop.c session.c]
[ssh.c sshd.c]
Implement a channel success/failure status confirmation callback
mechanism. Each channel maintains a queue of callbacks, which will
be drained in order (RFC4253 guarantees confirm messages are not
reordered within an channel).
Also includes a abandonment callback to clean up if a channel is
closed without sending confirmation messages. This probably
shouldn't happen in compliant implementations, but it could be
abused to leak memory.
ok markus@ (as part of a larger diff)
This commit is contained in:
Damien Miller
parent
db255cad05
commit
b84886ba3e
15
ChangeLog
15
ChangeLog
@ -62,6 +62,19 @@
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[bufaux.c buffer.h channels.c packet.c packet.h]
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avoid extra malloc/copy/free when receiving data over the net;
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~10% speedup for localhost-scp; ok djm@
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- djm@cvs.openbsd.org 2008/05/08 12:02:23
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[auth-options.c auth1.c channels.c channels.h clientloop.c gss-serv.c]
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[monitor.c monitor_wrap.c nchan.c servconf.c serverloop.c session.c]
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[ssh.c sshd.c]
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Implement a channel success/failure status confirmation callback
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mechanism. Each channel maintains a queue of callbacks, which will
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be drained in order (RFC4253 guarantees confirm messages are not
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reordered within an channel).
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Also includes a abandonment callback to clean up if a channel is
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closed without sending confirmation messages. This probably
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shouldn't happen in compliant implementations, but it could be
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abused to leak memory.
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ok markus@ (as part of a larger diff)
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20080403
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- (djm) [openbsd-compat/bsd-poll.c] Include stdlib.h to avoid compile-
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@ -3922,4 +3935,4 @@
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OpenServer 6 and add osr5bigcrypt support so when someone migrates
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passwords between UnixWare and OpenServer they will still work. OK dtucker@
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$Id: ChangeLog,v 1.4919 2008/05/19 04:59:37 djm Exp $
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$Id: ChangeLog,v 1.4920 2008/05/19 05:05:07 djm Exp $
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@ -1,4 +1,4 @@
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/* $OpenBSD: auth-options.c,v 1.41 2008/03/26 21:28:14 djm Exp $ */
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/* $OpenBSD: auth-options.c,v 1.42 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -20,6 +20,7 @@
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#include <stdio.h>
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#include <stdarg.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "match.h"
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#include "log.h"
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3
auth1.c
3
auth1.c
@ -1,4 +1,4 @@
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/* $OpenBSD: auth1.c,v 1.71 2007/09/21 08:15:29 djm Exp $ */
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/* $OpenBSD: auth1.c,v 1.72 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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@ -20,6 +20,7 @@
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#include <unistd.h>
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#include <pwd.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "rsa.h"
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#include "ssh1.h"
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73
channels.c
73
channels.c
@ -1,4 +1,4 @@
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/* $OpenBSD: channels.c,v 1.274 2008/05/08 06:59:01 markus Exp $ */
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/* $OpenBSD: channels.c,v 1.275 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -61,6 +61,7 @@
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#include <unistd.h>
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#include <stdarg.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "ssh.h"
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#include "ssh1.h"
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@ -319,10 +320,11 @@ channel_new(char *ctype, int type, int rfd, int wfd, int efd,
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c->single_connection = 0;
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c->detach_user = NULL;
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c->detach_close = 0;
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c->confirm = NULL;
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c->confirm_ctx = NULL;
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c->open_confirm = NULL;
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c->open_confirm_ctx = NULL;
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c->input_filter = NULL;
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c->output_filter = NULL;
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TAILQ_INIT(&c->status_confirms);
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debug("channel %d: new [%s]", found, remote_name);
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return c;
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}
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@ -379,6 +381,7 @@ channel_free(Channel *c)
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{
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char *s;
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u_int i, n;
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struct channel_confirm *cc;
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for (n = 0, i = 0; i < channels_alloc; i++)
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if (channels[i])
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@ -402,6 +405,13 @@ channel_free(Channel *c)
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xfree(c->remote_name);
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c->remote_name = NULL;
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}
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while ((cc = TAILQ_FIRST(&c->status_confirms)) != NULL) {
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if (cc->abandon_cb != NULL)
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cc->abandon_cb(c, cc->ctx);
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TAILQ_REMOVE(&c->status_confirms, cc, entry);
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bzero(cc, sizeof(*cc));
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xfree(cc);
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}
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channels[c->self] = NULL;
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xfree(c);
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}
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@ -660,16 +670,33 @@ channel_request_start(int id, char *service, int wantconfirm)
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}
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void
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channel_register_confirm(int id, channel_callback_fn *fn, void *ctx)
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channel_register_status_confirm(int id, channel_confirm_cb *cb,
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channel_confirm_abandon_cb *abandon_cb, void *ctx)
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{
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struct channel_confirm *cc;
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Channel *c;
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if ((c = channel_lookup(id)) == NULL)
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fatal("channel_register_expect: %d: bad id", id);
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cc = xmalloc(sizeof(*cc));
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cc->cb = cb;
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cc->abandon_cb = abandon_cb;
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cc->ctx = ctx;
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TAILQ_INSERT_TAIL(&c->status_confirms, cc, entry);
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}
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void
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channel_register_open_confirm(int id, channel_callback_fn *fn, void *ctx)
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{
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Channel *c = channel_lookup(id);
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if (c == NULL) {
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logit("channel_register_comfirm: %d: bad id", id);
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logit("channel_register_open_comfirm: %d: bad id", id);
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return;
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}
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c->confirm = fn;
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c->confirm_ctx = ctx;
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c->open_confirm = fn;
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c->open_confirm_ctx = ctx;
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}
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void
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@ -2209,9 +2236,9 @@ channel_input_open_confirmation(int type, u_int32_t seq, void *ctxt)
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if (compat20) {
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c->remote_window = packet_get_int();
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c->remote_maxpacket = packet_get_int();
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if (c->confirm) {
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if (c->open_confirm) {
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debug2("callback start");
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c->confirm(c->self, c->confirm_ctx);
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c->open_confirm(c->self, c->open_confirm_ctx);
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debug2("callback done");
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}
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debug2("channel %d: open confirm rwindow %u rmax %u", c->self,
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@ -2328,6 +2355,34 @@ channel_input_port_open(int type, u_int32_t seq, void *ctxt)
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xfree(host);
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}
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/* ARGSUSED */
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void
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channel_input_status_confirm(int type, u_int32_t seq, void *ctxt)
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{
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Channel *c;
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struct channel_confirm *cc;
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int remote_id;
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/* Reset keepalive timeout */
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keep_alive_timeouts = 0;
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remote_id = packet_get_int();
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packet_check_eom();
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debug2("channel_input_confirm: type %d id %d", type, remote_id);
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if ((c = channel_lookup(remote_id)) == NULL) {
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logit("channel_input_success_failure: %d: unknown", remote_id);
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return;
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}
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;
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if ((cc = TAILQ_FIRST(&c->status_confirms)) == NULL)
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return;
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cc->cb(type, c, cc->ctx);
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TAILQ_REMOVE(&c->status_confirms, cc, entry);
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bzero(cc, sizeof(*cc));
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xfree(cc);
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}
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/* -- tcp forwarding */
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26
channels.h
26
channels.h
@ -1,4 +1,4 @@
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/* $OpenBSD: channels.h,v 1.89 2007/06/11 09:14:00 markus Exp $ */
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/* $OpenBSD: channels.h,v 1.90 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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@ -64,6 +64,17 @@ typedef void channel_callback_fn(int, void *);
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typedef int channel_infilter_fn(struct Channel *, char *, int);
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typedef u_char *channel_outfilter_fn(struct Channel *, u_char **, u_int *);
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/* Channel success/failure callbacks */
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typedef void channel_confirm_cb(int, struct Channel *, void *);
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typedef void channel_confirm_abandon_cb(struct Channel *, void *);
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struct channel_confirm {
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TAILQ_ENTRY(channel_confirm) entry;
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channel_confirm_cb *cb;
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channel_confirm_abandon_cb *abandon_cb;
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void *ctx;
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};
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TAILQ_HEAD(channel_confirms, channel_confirm);
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struct Channel {
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int type; /* channel type/state */
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int self; /* my own channel identifier */
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@ -104,10 +115,11 @@ struct Channel {
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char *ctype; /* type */
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/* callback */
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channel_callback_fn *confirm;
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void *confirm_ctx;
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channel_callback_fn *open_confirm;
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void *open_confirm_ctx;
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channel_callback_fn *detach_user;
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int detach_close;
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struct channel_confirms status_confirms;
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/* filter */
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channel_infilter_fn *input_filter;
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@ -170,8 +182,11 @@ void channel_stop_listening(void);
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void channel_send_open(int);
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void channel_request_start(int, char *, int);
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void channel_register_cleanup(int, channel_callback_fn *, int);
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void channel_register_confirm(int, channel_callback_fn *, void *);
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void channel_register_filter(int, channel_infilter_fn *, channel_outfilter_fn *);
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void channel_register_open_confirm(int, channel_callback_fn *, void *);
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void channel_register_filter(int, channel_infilter_fn *,
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channel_outfilter_fn *);
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void channel_register_status_confirm(int, channel_confirm_cb *,
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channel_confirm_abandon_cb *, void *);
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void channel_cancel_cleanup(int);
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int channel_close_fd(int *);
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void channel_send_window_changes(void);
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@ -188,6 +203,7 @@ void channel_input_open_confirmation(int, u_int32_t, void *);
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void channel_input_open_failure(int, u_int32_t, void *);
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void channel_input_port_open(int, u_int32_t, void *);
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void channel_input_window_adjust(int, u_int32_t, void *);
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void channel_input_status_confirm(int, u_int32_t, void *);
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/* file descriptor handling (read/write) */
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10
clientloop.c
10
clientloop.c
@ -1,4 +1,4 @@
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/* $OpenBSD: clientloop.c,v 1.188 2008/02/22 20:44:02 dtucker Exp $ */
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/* $OpenBSD: clientloop.c,v 1.189 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -86,6 +86,7 @@
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#include <pwd.h>
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#include <unistd.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "ssh.h"
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#include "ssh1.h"
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@ -700,7 +701,7 @@ client_extra_session2_setup(int id, void *arg)
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cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env,
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client_subsystem_reply);
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c->confirm_ctx = NULL;
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c->open_confirm_ctx = NULL;
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buffer_free(&cctx->cmd);
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xfree(cctx->term);
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if (cctx->env != NULL) {
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@ -940,7 +941,8 @@ client_process_control(fd_set *readset)
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debug3("%s: channel_new: %d", __func__, c->self);
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channel_send_open(c->self);
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channel_register_confirm(c->self, client_extra_session2_setup, cctx);
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channel_register_open_confirm(c->self,
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client_extra_session2_setup, cctx);
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}
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static void
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@ -2068,6 +2070,8 @@ client_init_dispatch_20(void)
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dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
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dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
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dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
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dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm);
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dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm);
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dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
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/* rekeying */
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@ -1,4 +1,4 @@
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/* $OpenBSD: gss-serv.c,v 1.21 2007/06/12 08:20:00 djm Exp $ */
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/* $OpenBSD: gss-serv.c,v 1.22 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
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@ -35,6 +35,7 @@
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#include <string.h>
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#include <unistd.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "buffer.h"
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#include "key.h"
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@ -1,4 +1,4 @@
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/* $OpenBSD: monitor.c,v 1.94 2007/10/29 04:08:08 dtucker Exp $ */
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/* $OpenBSD: monitor.c,v 1.95 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* Copyright 2002 Markus Friedl <markus@openbsd.org>
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@ -51,6 +51,7 @@
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#include <openssl/dh.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "ssh.h"
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#include "key.h"
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@ -1,4 +1,4 @@
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/* $OpenBSD: monitor_wrap.c,v 1.60 2007/10/29 04:08:08 dtucker Exp $ */
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/* $OpenBSD: monitor_wrap.c,v 1.61 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* Copyright 2002 Markus Friedl <markus@openbsd.org>
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@ -41,6 +41,7 @@
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#include <openssl/bn.h>
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#include <openssl/dh.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "ssh.h"
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#include "dh.h"
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3
nchan.c
3
nchan.c
@ -1,4 +1,4 @@
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/* $OpenBSD: nchan.c,v 1.57 2006/08/03 03:34:42 deraadt Exp $ */
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/* $OpenBSD: nchan.c,v 1.58 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved.
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*
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@ -32,6 +32,7 @@
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#include <string.h>
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#include <stdarg.h>
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#include "openbsd-compat/sys-queue.h"
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#include "ssh1.h"
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#include "ssh2.h"
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#include "buffer.h"
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@ -1,4 +1,4 @@
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/* $OpenBSD: servconf.c,v 1.178 2008/05/07 05:49:37 pyr Exp $ */
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/* $OpenBSD: servconf.c,v 1.179 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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@ -24,6 +24,7 @@
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#include <unistd.h>
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#include <stdarg.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "ssh.h"
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#include "log.h"
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@ -1,4 +1,4 @@
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/* $OpenBSD: serverloop.c,v 1.148 2008/02/22 20:44:02 dtucker Exp $ */
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/* $OpenBSD: serverloop.c,v 1.149 2008/05/08 12:02:23 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -56,6 +56,7 @@
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#include <unistd.h>
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#include <stdarg.h>
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#include "openbsd-compat/sys-queue.h"
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#include "xmalloc.h"
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#include "packet.h"
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#include "buffer.h"
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@ -1188,8 +1189,9 @@ server_init_dispatch_20(void)
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dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &server_input_channel_req);
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dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
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dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request);
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dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm);
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dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm);
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/* client_alive */
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dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_keep_alive);
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dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &server_input_keep_alive);
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dispatch_set(SSH2_MSG_REQUEST_FAILURE, &server_input_keep_alive);
|
||||
/* rekeying */
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* $OpenBSD: session.c,v 1.235 2008/05/07 05:49:37 pyr Exp $ */
|
||||
/* $OpenBSD: session.c,v 1.236 2008/05/08 12:02:23 djm Exp $ */
|
||||
/*
|
||||
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
||||
* All rights reserved
|
||||
@ -59,6 +59,7 @@
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "openbsd-compat/sys-queue.h"
|
||||
#include "xmalloc.h"
|
||||
#include "ssh.h"
|
||||
#include "ssh1.h"
|
||||
|
||||
6
ssh.c
6
ssh.c
@ -1,4 +1,4 @@
|
||||
/* $OpenBSD: ssh.c,v 1.309 2008/01/19 20:51:26 djm Exp $ */
|
||||
/* $OpenBSD: ssh.c,v 1.310 2008/05/08 12:02:23 djm Exp $ */
|
||||
/*
|
||||
* Author: Tatu Ylonen <ylo@cs.hut.fi>
|
||||
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
||||
@ -73,6 +73,7 @@
|
||||
#include <openssl/evp.h>
|
||||
#include <openssl/err.h>
|
||||
#include "openbsd-compat/openssl-compat.h"
|
||||
#include "openbsd-compat/sys-queue.h"
|
||||
|
||||
#include "xmalloc.h"
|
||||
#include "ssh.h"
|
||||
@ -1195,7 +1196,8 @@ ssh_session2_open(void)
|
||||
|
||||
channel_send_open(c->self);
|
||||
if (!no_shell_flag)
|
||||
channel_register_confirm(c->self, ssh_session2_setup, NULL);
|
||||
channel_register_open_confirm(c->self,
|
||||
ssh_session2_setup, NULL);
|
||||
|
||||
return c->self;
|
||||
}
|
||||
|
||||
3
sshd.c
3
sshd.c
@ -1,4 +1,4 @@
|
||||
/* $OpenBSD: sshd.c,v 1.356 2008/04/13 00:22:17 djm Exp $ */
|
||||
/* $OpenBSD: sshd.c,v 1.357 2008/05/08 12:02:23 djm Exp $ */
|
||||
/*
|
||||
* Author: Tatu Ylonen <ylo@cs.hut.fi>
|
||||
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
||||
@ -54,6 +54,7 @@
|
||||
# include <sys/time.h>
|
||||
#endif
|
||||
#include "openbsd-compat/sys-tree.h"
|
||||
#include "openbsd-compat/sys-queue.h"
|
||||
#include <sys/wait.h>
|
||||
|
||||
#include <errno.h>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user