blob: f0437cdeef56845198ba43b14df47a20b1e3fd18 [file] [log] [blame]
Damien Miller4af51302000-04-16 11:18:38 +10001/*
2 * Copyright (c) 2000 Markus Friedl. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
Damien Miller4af51302000-04-16 11:18:38 +100012 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24#include "includes.h"
Kevin Steves2b725a02001-02-05 18:16:28 +000025RCSID("$OpenBSD: dispatch.c,v 1.9 2001/02/04 15:32:23 stevesk Exp $");
Ben Lindstrom226cfa02001-01-22 05:34:40 +000026
27#include "ssh1.h"
Ben Lindstromef1cf5d2001-01-29 07:55:07 +000028#include "ssh2.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000029#include "log.h"
Damien Miller4af51302000-04-16 11:18:38 +100030#include "dispatch.h"
31#include "packet.h"
Ben Lindstromef1cf5d2001-01-29 07:55:07 +000032#include "compat.h"
Damien Miller4af51302000-04-16 11:18:38 +100033
34#define DISPATCH_MIN 0
35#define DISPATCH_MAX 255
36
37dispatch_fn *dispatch[DISPATCH_MAX];
38
39void
Damien Miller62cee002000-09-23 17:15:56 +110040dispatch_protocol_error(int type, int plen, void *ctxt)
Damien Miller4af51302000-04-16 11:18:38 +100041{
42 error("Hm, dispatch protocol error: type %d plen %d", type, plen);
Ben Lindstromef1cf5d2001-01-29 07:55:07 +000043 if (compat20 && type == SSH2_MSG_KEXDH_INIT)
44 fatal("dispatch_protocol_error: rekeying is not supported");
Damien Miller4af51302000-04-16 11:18:38 +100045}
46void
47dispatch_init(dispatch_fn *dflt)
48{
49 int i;
50 for (i = 0; i < DISPATCH_MAX; i++)
51 dispatch[i] = dflt;
52}
53void
54dispatch_set(int type, dispatch_fn *fn)
55{
56 dispatch[type] = fn;
57}
58void
Damien Miller62cee002000-09-23 17:15:56 +110059dispatch_run(int mode, int *done, void *ctxt)
Damien Miller4af51302000-04-16 11:18:38 +100060{
61 for (;;) {
62 int plen;
63 int type;
64
65 if (mode == DISPATCH_BLOCK) {
66 type = packet_read(&plen);
67 } else {
68 type = packet_read_poll(&plen);
69 if (type == SSH_MSG_NONE)
70 return;
71 }
72 if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
Damien Miller62cee002000-09-23 17:15:56 +110073 (*dispatch[type])(type, plen, ctxt);
Damien Miller4af51302000-04-16 11:18:38 +100074 else
Kevin Stevesef4eea92001-02-05 12:42:17 +000075 packet_disconnect("protocol error: rcvd type %d", type);
Damien Miller4af51302000-04-16 11:18:38 +100076 if (done != NULL && *done)
77 return;
78 }
79}