Annotation of src/usr.bin/ssh/dispatch.c, Revision 1.20
1.20 ! stevesk 1: /* $OpenBSD: dispatch.c,v 1.19 2006/04/20 09:27:09 djm Exp $ */
1.1 markus 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: */
25: #include "includes.h"
1.20 ! stevesk 26:
! 27: #include <signal.h>
1.7 markus 28:
1.6 markus 29: #include "ssh1.h"
1.8 markus 30: #include "ssh2.h"
1.7 markus 31: #include "log.h"
1.1 markus 32: #include "dispatch.h"
33: #include "packet.h"
1.8 markus 34: #include "compat.h"
1.1 markus 35:
36: #define DISPATCH_MIN 0
37: #define DISPATCH_MAX 255
38:
39: dispatch_fn *dispatch[DISPATCH_MAX];
40:
41: void
1.14 markus 42: dispatch_protocol_error(int type, u_int32_t seq, void *ctxt)
1.1 markus 43: {
1.16 itojun 44: logit("dispatch_protocol_error: type %d seq %u", type, seq);
1.15 markus 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: {
1.16 itojun 55: logit("dispatch_protocol_ignore: type %d seq %u", type, seq);
1.1 markus 56: }
1.2 markus 57: void
1.1 markus 58: dispatch_init(dispatch_fn *dflt)
59: {
1.15 markus 60: u_int i;
1.1 markus 61: for (i = 0; i < DISPATCH_MAX; i++)
62: dispatch[i] = dflt;
1.15 markus 63: }
64: void
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: }
1.1 markus 74: }
75: void
76: dispatch_set(int type, dispatch_fn *fn)
77: {
78: dispatch[type] = fn;
79: }
80: void
1.19 djm 81: dispatch_run(int mode, volatile sig_atomic_t *done, void *ctxt)
1.1 markus 82: {
83: for (;;) {
84: int type;
1.12 djm 85: u_int32_t seqnr;
1.1 markus 86:
87: if (mode == DISPATCH_BLOCK) {
1.13 markus 88: type = packet_read_seqnr(&seqnr);
1.1 markus 89: } else {
1.13 markus 90: type = packet_read_poll_seqnr(&seqnr);
1.1 markus 91: if (type == SSH_MSG_NONE)
92: return;
93: }
94: if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
1.14 markus 95: (*dispatch[type])(type, seqnr, ctxt);
1.1 markus 96: else
1.9 stevesk 97: packet_disconnect("protocol error: rcvd type %d", type);
1.1 markus 98: if (done != NULL && *done)
99: return;
100: }
101: }