Annotation of src/usr.bin/ssh/dispatch.c, Revision 1.22
1.22 ! stevesk 1: /* $OpenBSD: dispatch.c,v 1.21 2006/08/03 03:34:42 deraadt 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: */
1.21 deraadt 25:
26: #include <sys/types.h>
1.20 stevesk 27:
28: #include <signal.h>
1.21 deraadt 29: #include <stdarg.h>
1.7 markus 30:
1.6 markus 31: #include "ssh1.h"
1.8 markus 32: #include "ssh2.h"
1.7 markus 33: #include "log.h"
1.1 markus 34: #include "dispatch.h"
35: #include "packet.h"
1.8 markus 36: #include "compat.h"
1.1 markus 37:
38: #define DISPATCH_MAX 255
39:
40: dispatch_fn *dispatch[DISPATCH_MAX];
41:
42: void
1.14 markus 43: dispatch_protocol_error(int type, u_int32_t seq, void *ctxt)
1.1 markus 44: {
1.16 itojun 45: logit("dispatch_protocol_error: type %d seq %u", type, seq);
1.15 markus 46: if (!compat20)
47: fatal("protocol error");
48: packet_start(SSH2_MSG_UNIMPLEMENTED);
49: packet_put_int(seq);
50: packet_send();
51: packet_write_wait();
52: }
53: void
54: dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt)
55: {
1.16 itojun 56: logit("dispatch_protocol_ignore: type %d seq %u", type, seq);
1.1 markus 57: }
1.2 markus 58: void
1.1 markus 59: dispatch_init(dispatch_fn *dflt)
60: {
1.15 markus 61: u_int i;
1.1 markus 62: for (i = 0; i < DISPATCH_MAX; i++)
63: dispatch[i] = dflt;
1.15 markus 64: }
65: void
66: dispatch_range(u_int from, u_int to, dispatch_fn *fn)
67: {
68: u_int i;
69:
70: for (i = from; i <= to; i++) {
71: if (i >= DISPATCH_MAX)
72: break;
73: dispatch[i] = fn;
74: }
1.1 markus 75: }
76: void
77: dispatch_set(int type, dispatch_fn *fn)
78: {
79: dispatch[type] = fn;
80: }
81: void
1.19 djm 82: dispatch_run(int mode, volatile sig_atomic_t *done, void *ctxt)
1.1 markus 83: {
84: for (;;) {
85: int type;
1.12 djm 86: u_int32_t seqnr;
1.1 markus 87:
88: if (mode == DISPATCH_BLOCK) {
1.13 markus 89: type = packet_read_seqnr(&seqnr);
1.1 markus 90: } else {
1.13 markus 91: type = packet_read_poll_seqnr(&seqnr);
1.1 markus 92: if (type == SSH_MSG_NONE)
93: return;
94: }
95: if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
1.14 markus 96: (*dispatch[type])(type, seqnr, ctxt);
1.1 markus 97: else
1.9 stevesk 98: packet_disconnect("protocol error: rcvd type %d", type);
1.1 markus 99: if (done != NULL && *done)
100: return;
101: }
102: }