b54c312497
2 known bugs: . Build doesn't copy libssh* to the destination directory. + workaround is to copy them from the lib directory to destination and recreate links . ssh_config and sshd_config don't install + workaround is to copy them manually Note the software doesn't build to completion until you do the workarounds. Still trying to sort this out, but wanted to get these changes up for more visibility and collaboration.
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/* $OpenBSD: dispatch.c,v 1.27 2015/05/01 07:10:01 djm 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 "ssh1.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, void *ctx)
|
|
{
|
|
struct ssh *ssh = active_state; /* XXX */
|
|
int r;
|
|
|
|
logit("dispatch_protocol_error: type %d seq %u", type, seq);
|
|
if (!compat20)
|
|
fatal("protocol error");
|
|
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, void *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,
|
|
void *ctxt)
|
|
{
|
|
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;
|
|
}
|
|
/* XXX 'ssh' will replace 'ctxt' later */
|
|
r = (*ssh->dispatch[type])(type, seqnr, ctxt);
|
|
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,
|
|
void *ctxt)
|
|
{
|
|
int r;
|
|
|
|
if ((r = ssh_dispatch_run(ssh, mode, done, ctxt)) != 0)
|
|
sshpkt_fatal(ssh, __func__, r);
|
|
}
|