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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: }