mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-11-24 19:53:24 +08:00
92e9fe6331
remove now obsolete ctx from ssh_dispatch_run; ok djm@ Upstream-ID: 9870aabf7f4d71660c31fda91b942b19a8e68d29
136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/* $OpenBSD: dispatch.c,v 1.31 2017/05/31 07:00:13 markus Exp $ */
|
|
/*
|
|
* Copyright (c) 2000 Markus Friedl. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <signal.h>
|
|
#include <stdarg.h>
|
|
|
|
#include "ssh2.h"
|
|
#include "log.h"
|
|
#include "dispatch.h"
|
|
#include "packet.h"
|
|
#include "compat.h"
|
|
#include "ssherr.h"
|
|
|
|
int
|
|
dispatch_protocol_error(int type, u_int32_t seq, struct ssh *ssh)
|
|
{
|
|
int r;
|
|
|
|
logit("dispatch_protocol_error: type %d seq %u", type, seq);
|
|
if ((r = sshpkt_start(ssh, SSH2_MSG_UNIMPLEMENTED)) != 0 ||
|
|
(r = sshpkt_put_u32(ssh, seq)) != 0 ||
|
|
(r = sshpkt_send(ssh)) != 0 ||
|
|
(r = ssh_packet_write_wait(ssh)) != 0)
|
|
sshpkt_fatal(ssh, __func__, r);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
dispatch_protocol_ignore(int type, u_int32_t seq, struct ssh *ssh)
|
|
{
|
|
logit("dispatch_protocol_ignore: type %d seq %u", type, seq);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
ssh_dispatch_init(struct ssh *ssh, dispatch_fn *dflt)
|
|
{
|
|
u_int i;
|
|
for (i = 0; i < DISPATCH_MAX; i++)
|
|
ssh->dispatch[i] = dflt;
|
|
}
|
|
|
|
void
|
|
ssh_dispatch_range(struct ssh *ssh, u_int from, u_int to, dispatch_fn *fn)
|
|
{
|
|
u_int i;
|
|
|
|
for (i = from; i <= to; i++) {
|
|
if (i >= DISPATCH_MAX)
|
|
break;
|
|
ssh->dispatch[i] = fn;
|
|
}
|
|
}
|
|
|
|
void
|
|
ssh_dispatch_set(struct ssh *ssh, int type, dispatch_fn *fn)
|
|
{
|
|
ssh->dispatch[type] = fn;
|
|
}
|
|
|
|
int
|
|
ssh_dispatch_run(struct ssh *ssh, int mode, volatile sig_atomic_t *done)
|
|
{
|
|
int r;
|
|
u_char type;
|
|
u_int32_t seqnr;
|
|
|
|
for (;;) {
|
|
if (mode == DISPATCH_BLOCK) {
|
|
r = ssh_packet_read_seqnr(ssh, &type, &seqnr);
|
|
if (r != 0)
|
|
return r;
|
|
} else {
|
|
r = ssh_packet_read_poll_seqnr(ssh, &type, &seqnr);
|
|
if (r != 0)
|
|
return r;
|
|
if (type == SSH_MSG_NONE)
|
|
return 0;
|
|
}
|
|
if (type > 0 && type < DISPATCH_MAX &&
|
|
ssh->dispatch[type] != NULL) {
|
|
if (ssh->dispatch_skip_packets) {
|
|
debug2("skipped packet (type %u)", type);
|
|
ssh->dispatch_skip_packets--;
|
|
continue;
|
|
}
|
|
r = (*ssh->dispatch[type])(type, seqnr, ssh);
|
|
if (r != 0)
|
|
return r;
|
|
} else {
|
|
r = sshpkt_disconnect(ssh,
|
|
"protocol error: rcvd type %d", type);
|
|
if (r != 0)
|
|
return r;
|
|
return SSH_ERR_DISCONNECTED;
|
|
}
|
|
if (done != NULL && *done)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
ssh_dispatch_run_fatal(struct ssh *ssh, int mode, volatile sig_atomic_t *done)
|
|
{
|
|
int r;
|
|
|
|
if ((r = ssh_dispatch_run(ssh, mode, done)) != 0)
|
|
sshpkt_fatal(ssh, __func__, r);
|
|
}
|