1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * Copyright (c) 2000 Markus Friedl. All rights reserved.
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
5*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
6*0Sstevel@tonic-gate * are met:
7*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
8*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
9*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
10*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
11*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
12*0Sstevel@tonic-gate *
13*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14*0Sstevel@tonic-gate * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15*0Sstevel@tonic-gate * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16*0Sstevel@tonic-gate * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17*0Sstevel@tonic-gate * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18*0Sstevel@tonic-gate * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19*0Sstevel@tonic-gate * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20*0Sstevel@tonic-gate * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21*0Sstevel@tonic-gate * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22*0Sstevel@tonic-gate * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23*0Sstevel@tonic-gate */
24*0Sstevel@tonic-gate #include "includes.h"
25*0Sstevel@tonic-gate RCSID("$OpenBSD: dispatch.c,v 1.15 2002/01/11 13:39:36 markus Exp $");
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include "ssh1.h"
30*0Sstevel@tonic-gate #include "ssh2.h"
31*0Sstevel@tonic-gate #include "log.h"
32*0Sstevel@tonic-gate #include "dispatch.h"
33*0Sstevel@tonic-gate #include "packet.h"
34*0Sstevel@tonic-gate #include "compat.h"
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate #define DISPATCH_MIN 0
37*0Sstevel@tonic-gate #define DISPATCH_MAX 255
38*0Sstevel@tonic-gate
39*0Sstevel@tonic-gate dispatch_fn *dispatch[DISPATCH_MAX];
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate void
dispatch_protocol_error(int type,u_int32_t seq,void * ctxt)42*0Sstevel@tonic-gate dispatch_protocol_error(int type, u_int32_t seq, void *ctxt)
43*0Sstevel@tonic-gate {
44*0Sstevel@tonic-gate log("dispatch_protocol_error: type %d seq %u", type, seq);
45*0Sstevel@tonic-gate if (!compat20)
46*0Sstevel@tonic-gate fatal("protocol error");
47*0Sstevel@tonic-gate packet_start(SSH2_MSG_UNIMPLEMENTED);
48*0Sstevel@tonic-gate packet_put_int(seq);
49*0Sstevel@tonic-gate packet_send();
50*0Sstevel@tonic-gate packet_write_wait();
51*0Sstevel@tonic-gate }
52*0Sstevel@tonic-gate void
dispatch_protocol_ignore(int type,u_int32_t seq,void * ctxt)53*0Sstevel@tonic-gate dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt)
54*0Sstevel@tonic-gate {
55*0Sstevel@tonic-gate log("dispatch_protocol_ignore: type %d seq %u", type, seq);
56*0Sstevel@tonic-gate }
57*0Sstevel@tonic-gate void
dispatch_init(dispatch_fn * dflt)58*0Sstevel@tonic-gate dispatch_init(dispatch_fn *dflt)
59*0Sstevel@tonic-gate {
60*0Sstevel@tonic-gate u_int i;
61*0Sstevel@tonic-gate for (i = 0; i < DISPATCH_MAX; i++)
62*0Sstevel@tonic-gate dispatch[i] = dflt;
63*0Sstevel@tonic-gate }
64*0Sstevel@tonic-gate void
dispatch_range(u_int from,u_int to,dispatch_fn * fn)65*0Sstevel@tonic-gate dispatch_range(u_int from, u_int to, dispatch_fn *fn)
66*0Sstevel@tonic-gate {
67*0Sstevel@tonic-gate u_int i;
68*0Sstevel@tonic-gate
69*0Sstevel@tonic-gate for (i = from; i <= to; i++) {
70*0Sstevel@tonic-gate if (i >= DISPATCH_MAX)
71*0Sstevel@tonic-gate break;
72*0Sstevel@tonic-gate dispatch[i] = fn;
73*0Sstevel@tonic-gate }
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate void
dispatch_set(int type,dispatch_fn * fn)76*0Sstevel@tonic-gate dispatch_set(int type, dispatch_fn *fn)
77*0Sstevel@tonic-gate {
78*0Sstevel@tonic-gate dispatch[type] = fn;
79*0Sstevel@tonic-gate }
80*0Sstevel@tonic-gate void
dispatch_run(int mode,int * done,void * ctxt)81*0Sstevel@tonic-gate dispatch_run(int mode, int *done, void *ctxt)
82*0Sstevel@tonic-gate {
83*0Sstevel@tonic-gate for (;;) {
84*0Sstevel@tonic-gate int type;
85*0Sstevel@tonic-gate u_int32_t seqnr;
86*0Sstevel@tonic-gate
87*0Sstevel@tonic-gate if (mode == DISPATCH_BLOCK) {
88*0Sstevel@tonic-gate type = packet_read_seqnr(&seqnr);
89*0Sstevel@tonic-gate } else {
90*0Sstevel@tonic-gate type = packet_read_poll_seqnr(&seqnr);
91*0Sstevel@tonic-gate if (type == SSH_MSG_NONE)
92*0Sstevel@tonic-gate return;
93*0Sstevel@tonic-gate }
94*0Sstevel@tonic-gate if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
95*0Sstevel@tonic-gate (*dispatch[type])(type, seqnr, ctxt);
96*0Sstevel@tonic-gate else
97*0Sstevel@tonic-gate packet_disconnect("protocol error: rcvd type %d", type);
98*0Sstevel@tonic-gate if (done != NULL && *done)
99*0Sstevel@tonic-gate return;
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate }
102