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3c0ef626 | 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" | |
0fff78ff | 25 | RCSID("$OpenBSD: dispatch.c,v 1.16 2003/04/08 20:21:28 itojun Exp $"); |
3c0ef626 | 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 | |
e9a17296 | 40 | dispatch_protocol_error(int type, u_int32_t seq, void *ctxt) |
3c0ef626 | 41 | { |
0fff78ff | 42 | logit("dispatch_protocol_error: type %d seq %u", type, seq); |
e9a17296 | 43 | if (!compat20) |
44 | fatal("protocol error"); | |
45 | packet_start(SSH2_MSG_UNIMPLEMENTED); | |
46 | packet_put_int(seq); | |
47 | packet_send(); | |
48 | packet_write_wait(); | |
49 | } | |
50 | void | |
51 | dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt) | |
52 | { | |
0fff78ff | 53 | logit("dispatch_protocol_ignore: type %d seq %u", type, seq); |
3c0ef626 | 54 | } |
55 | void | |
56 | dispatch_init(dispatch_fn *dflt) | |
57 | { | |
e9a17296 | 58 | u_int i; |
3c0ef626 | 59 | for (i = 0; i < DISPATCH_MAX; i++) |
60 | dispatch[i] = dflt; | |
61 | } | |
62 | void | |
e9a17296 | 63 | dispatch_range(u_int from, u_int to, dispatch_fn *fn) |
64 | { | |
65 | u_int i; | |
66 | ||
67 | for (i = from; i <= to; i++) { | |
68 | if (i >= DISPATCH_MAX) | |
69 | break; | |
70 | dispatch[i] = fn; | |
71 | } | |
72 | } | |
73 | void | |
3c0ef626 | 74 | dispatch_set(int type, dispatch_fn *fn) |
75 | { | |
76 | dispatch[type] = fn; | |
77 | } | |
78 | void | |
79 | dispatch_run(int mode, int *done, void *ctxt) | |
80 | { | |
81 | for (;;) { | |
3c0ef626 | 82 | int type; |
e9a17296 | 83 | u_int32_t seqnr; |
3c0ef626 | 84 | |
85 | if (mode == DISPATCH_BLOCK) { | |
e9a17296 | 86 | type = packet_read_seqnr(&seqnr); |
3c0ef626 | 87 | } else { |
e9a17296 | 88 | type = packet_read_poll_seqnr(&seqnr); |
3c0ef626 | 89 | if (type == SSH_MSG_NONE) |
90 | return; | |
91 | } | |
92 | if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL) | |
e9a17296 | 93 | (*dispatch[type])(type, seqnr, ctxt); |
3c0ef626 | 94 | else |
95 | packet_disconnect("protocol error: rcvd type %d", type); | |
96 | if (done != NULL && *done) | |
97 | return; | |
98 | } | |
99 | } |