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1 | /* | |
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. | |
12 | * | |
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" | |
25 | RCSID("$OpenBSD: dispatch.c,v 1.10 2001/02/18 18:33:53 markus Exp $"); | |
26 | ||
27 | #include "ssh1.h" | |
28 | #include "ssh2.h" | |
29 | #include "log.h" | |
30 | #include "dispatch.h" | |
31 | #include "packet.h" | |
32 | #include "compat.h" | |
33 | ||
34 | #define DISPATCH_MIN 0 | |
35 | #define DISPATCH_MAX 255 | |
36 | ||
37 | dispatch_fn *dispatch[DISPATCH_MAX]; | |
38 | ||
39 | void | |
40 | dispatch_protocol_error(int type, int plen, void *ctxt) | |
41 | { | |
42 | error("Hm, dispatch protocol error: type %d plen %d", type, plen); | |
43 | if (compat20 && type == SSH2_MSG_KEXINIT) | |
44 | fatal("dispatch_protocol_error: rekeying is not supported"); | |
45 | } | |
46 | void | |
47 | dispatch_init(dispatch_fn *dflt) | |
48 | { | |
49 | int i; | |
50 | for (i = 0; i < DISPATCH_MAX; i++) | |
51 | dispatch[i] = dflt; | |
52 | } | |
53 | void | |
54 | dispatch_set(int type, dispatch_fn *fn) | |
55 | { | |
56 | dispatch[type] = fn; | |
57 | } | |
58 | void | |
59 | dispatch_run(int mode, int *done, void *ctxt) | |
60 | { | |
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) | |
73 | (*dispatch[type])(type, plen, ctxt); | |
74 | else | |
75 | packet_disconnect("protocol error: rcvd type %d", type); | |
76 | if (done != NULL && *done) | |
77 | return; | |
78 | } | |
79 | } |