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2e437378 | 1 | /* $OpenBSD: dispatch.c,v 1.21 2006/08/03 03:34:42 deraadt Exp $ */ |
3c0ef626 | 2 | /* |
3 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | */ | |
2e437378 | 25 | |
3c0ef626 | 26 | #include "includes.h" |
2e437378 | 27 | |
28 | #include <sys/types.h> | |
29 | ||
30 | #include <signal.h> | |
31 | #include <stdarg.h> | |
3c0ef626 | 32 | |
33 | #include "ssh1.h" | |
34 | #include "ssh2.h" | |
35 | #include "log.h" | |
36 | #include "dispatch.h" | |
37 | #include "packet.h" | |
38 | #include "compat.h" | |
39 | ||
40 | #define DISPATCH_MIN 0 | |
41 | #define DISPATCH_MAX 255 | |
42 | ||
43 | dispatch_fn *dispatch[DISPATCH_MAX]; | |
44 | ||
45 | void | |
e9a17296 | 46 | dispatch_protocol_error(int type, u_int32_t seq, void *ctxt) |
3c0ef626 | 47 | { |
70791e56 | 48 | logit("dispatch_protocol_error: type %d seq %u", type, seq); |
e9a17296 | 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 | } | |
56 | void | |
57 | dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt) | |
58 | { | |
70791e56 | 59 | logit("dispatch_protocol_ignore: type %d seq %u", type, seq); |
3c0ef626 | 60 | } |
61 | void | |
62 | dispatch_init(dispatch_fn *dflt) | |
63 | { | |
e9a17296 | 64 | u_int i; |
3c0ef626 | 65 | for (i = 0; i < DISPATCH_MAX; i++) |
66 | dispatch[i] = dflt; | |
67 | } | |
68 | void | |
e9a17296 | 69 | dispatch_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 | } | |
79 | void | |
3c0ef626 | 80 | dispatch_set(int type, dispatch_fn *fn) |
81 | { | |
82 | dispatch[type] = fn; | |
83 | } | |
84 | void | |
2e437378 | 85 | dispatch_run(int mode, volatile sig_atomic_t *done, void *ctxt) |
3c0ef626 | 86 | { |
87 | for (;;) { | |
3c0ef626 | 88 | int type; |
e9a17296 | 89 | u_int32_t seqnr; |
3c0ef626 | 90 | |
91 | if (mode == DISPATCH_BLOCK) { | |
e9a17296 | 92 | type = packet_read_seqnr(&seqnr); |
3c0ef626 | 93 | } else { |
e9a17296 | 94 | type = packet_read_poll_seqnr(&seqnr); |
3c0ef626 | 95 | if (type == SSH_MSG_NONE) |
96 | return; | |
97 | } | |
98 | if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL) | |
e9a17296 | 99 | (*dispatch[type])(type, seqnr, ctxt); |
3c0ef626 | 100 | else |
101 | packet_disconnect("protocol error: rcvd type %d", type); | |
102 | if (done != NULL && *done) | |
103 | return; | |
104 | } | |
105 | } |