1 /* 2 * Copyright (c) 2000 Markus Friedl. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. All advertising materials mentioning features or use of this software 13 * must display the following acknowledgement: 14 * This product includes software developed by Markus Friedl. 15 * 4. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #include "includes.h" 30 RCSID("$Id: dispatch.c,v 1.2 2000/04/14 10:30:31 markus Exp $"); 31 #include "ssh.h" 32 #include "dispatch.h" 33 #include "packet.h" 34 35 #define DISPATCH_MIN 0 36 #define DISPATCH_MAX 255 37 38 dispatch_fn *dispatch[DISPATCH_MAX]; 39 40 void 41 dispatch_protocol_error(int type, int plen) 42 { 43 error("Hm, dispatch protocol error: type %d plen %d", type, plen); 44 } 45 void 46 dispatch_init(dispatch_fn *dflt) 47 { 48 int i; 49 for (i = 0; i < DISPATCH_MAX; i++) 50 dispatch[i] = dflt; 51 } 52 void 53 dispatch_set(int type, dispatch_fn *fn) 54 { 55 dispatch[type] = fn; 56 } 57 void 58 dispatch_run(int mode, int *done) 59 { 60 for (;;) { 61 int plen; 62 int type; 63 64 if (mode == DISPATCH_BLOCK) { 65 type = packet_read(&plen); 66 } else { 67 type = packet_read_poll(&plen); 68 if (type == SSH_MSG_NONE) 69 return; 70 } 71 if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL) 72 (*dispatch[type])(type, plen); 73 else 74 packet_disconnect("protocol error: rcvd type %d", type); 75 if (done != NULL && *done) 76 return; 77 } 78 } 79