Damien Miller | d8337c5 | 2006-07-24 14:14:19 +1000 | [diff] [blame] | 1 | /* $OpenBSD: dispatch.c,v 1.20 2006/07/23 01:11:05 stevesk Exp $ */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 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. |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 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 | */ |
| 25 | #include "includes.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 26 | |
Damien Miller | d8337c5 | 2006-07-24 14:14:19 +1000 | [diff] [blame] | 27 | #include <signal.h> |
| 28 | |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 29 | #include "ssh1.h" |
Ben Lindstrom | ef1cf5d | 2001-01-29 07:55:07 +0000 | [diff] [blame] | 30 | #include "ssh2.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 31 | #include "log.h" |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 32 | #include "dispatch.h" |
| 33 | #include "packet.h" |
Ben Lindstrom | ef1cf5d | 2001-01-29 07:55:07 +0000 | [diff] [blame] | 34 | #include "compat.h" |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 35 | |
| 36 | #define DISPATCH_MIN 0 |
| 37 | #define DISPATCH_MAX 255 |
| 38 | |
| 39 | dispatch_fn *dispatch[DISPATCH_MAX]; |
| 40 | |
| 41 | void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 42 | dispatch_protocol_error(int type, u_int32_t seq, void *ctxt) |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 43 | { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 44 | logit("dispatch_protocol_error: type %d seq %u", type, seq); |
Damien Miller | 7d05339 | 2002-01-22 23:24:13 +1100 | [diff] [blame] | 45 | if (!compat20) |
| 46 | fatal("protocol error"); |
| 47 | packet_start(SSH2_MSG_UNIMPLEMENTED); |
| 48 | packet_put_int(seq); |
| 49 | packet_send(); |
| 50 | packet_write_wait(); |
| 51 | } |
| 52 | void |
| 53 | dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt) |
| 54 | { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 55 | logit("dispatch_protocol_ignore: type %d seq %u", type, seq); |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 56 | } |
| 57 | void |
| 58 | dispatch_init(dispatch_fn *dflt) |
| 59 | { |
Damien Miller | 7d05339 | 2002-01-22 23:24:13 +1100 | [diff] [blame] | 60 | u_int i; |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 61 | for (i = 0; i < DISPATCH_MAX; i++) |
| 62 | dispatch[i] = dflt; |
| 63 | } |
| 64 | void |
Damien Miller | 7d05339 | 2002-01-22 23:24:13 +1100 | [diff] [blame] | 65 | dispatch_range(u_int from, u_int to, dispatch_fn *fn) |
| 66 | { |
| 67 | u_int i; |
| 68 | |
| 69 | for (i = from; i <= to; i++) { |
| 70 | if (i >= DISPATCH_MAX) |
| 71 | break; |
| 72 | dispatch[i] = fn; |
| 73 | } |
| 74 | } |
| 75 | void |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 76 | dispatch_set(int type, dispatch_fn *fn) |
| 77 | { |
| 78 | dispatch[type] = fn; |
| 79 | } |
| 80 | void |
Damien Miller | 97c91f6 | 2006-04-23 12:08:37 +1000 | [diff] [blame] | 81 | dispatch_run(int mode, volatile sig_atomic_t *done, void *ctxt) |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 82 | { |
| 83 | for (;;) { |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 84 | int type; |
Damien Miller | 278f907 | 2001-12-21 15:00:19 +1100 | [diff] [blame] | 85 | u_int32_t seqnr; |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 86 | |
| 87 | if (mode == DISPATCH_BLOCK) { |
Damien Miller | dff5099 | 2002-01-22 23:16:32 +1100 | [diff] [blame] | 88 | type = packet_read_seqnr(&seqnr); |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 89 | } else { |
Damien Miller | dff5099 | 2002-01-22 23:16:32 +1100 | [diff] [blame] | 90 | type = packet_read_poll_seqnr(&seqnr); |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 91 | if (type == SSH_MSG_NONE) |
| 92 | return; |
| 93 | } |
| 94 | if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL) |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 95 | (*dispatch[type])(type, seqnr, ctxt); |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 96 | else |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 97 | packet_disconnect("protocol error: rcvd type %d", type); |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 98 | if (done != NULL && *done) |
| 99 | return; |
| 100 | } |
| 101 | } |