1/*	$NetBSD: dispatch.c,v 1.2 2009/06/07 22:38:46 christos Exp $	*/
2/* $OpenBSD: dispatch.c,v 1.22 2008/10/31 15:05:34 stevesk Exp $ */
3/*
4 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "includes.h"
28__RCSID("$NetBSD: dispatch.c,v 1.2 2009/06/07 22:38:46 christos Exp $");
29#include <sys/types.h>
30
31#include <signal.h>
32#include <stdarg.h>
33
34#include "ssh1.h"
35#include "ssh2.h"
36#include "log.h"
37#include "dispatch.h"
38#include "packet.h"
39#include "compat.h"
40
41#define DISPATCH_MAX	255
42
43dispatch_fn *dispatch[DISPATCH_MAX];
44
45void
46dispatch_protocol_error(int type, u_int32_t seq, void *ctxt)
47{
48	logit("dispatch_protocol_error: type %d seq %u", type, seq);
49	if (!compat20)
50		fatal("protocol error");
51	packet_start(SSH2_MSG_UNIMPLEMENTED);
52	packet_put_int(seq);
53	packet_send();
54	packet_write_wait();
55}
56void
57dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt)
58{
59	logit("dispatch_protocol_ignore: type %d seq %u", type, seq);
60}
61void
62dispatch_init(dispatch_fn *dflt)
63{
64	u_int i;
65	for (i = 0; i < DISPATCH_MAX; i++)
66		dispatch[i] = dflt;
67}
68void
69dispatch_range(u_int from, u_int to, dispatch_fn *fn)
70{
71	u_int i;
72
73	for (i = from; i <= to; i++) {
74		if (i >= DISPATCH_MAX)
75			break;
76		dispatch[i] = fn;
77	}
78}
79void
80dispatch_set(int type, dispatch_fn *fn)
81{
82	dispatch[type] = fn;
83}
84void
85dispatch_run(int mode, volatile sig_atomic_t *done, void *ctxt)
86{
87	for (;;) {
88		int type;
89		u_int32_t seqnr;
90
91		if (mode == DISPATCH_BLOCK) {
92			type = packet_read_seqnr(&seqnr);
93		} else {
94			type = packet_read_poll_seqnr(&seqnr);
95			if (type == SSH_MSG_NONE)
96				return;
97		}
98		if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
99			(*dispatch[type])(type, seqnr, ctxt);
100		else
101			packet_disconnect("protocol error: rcvd type %d", type);
102		if (done != NULL && *done)
103			return;
104	}
105}
106