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 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 #include "includes.h" 25 RCSID("$OpenBSD: dispatch.c,v 1.10 2001/02/18 18:33:53 markus Exp $"); 26 27 #include "ssh1.h" 28 #include "ssh2.h" 29 #include "log.h" 30 #include "dispatch.h" 31 #include "packet.h" 32 #include "compat.h" 33 34 #define DISPATCH_MIN 0 35 #define DISPATCH_MAX 255 36 37 dispatch_fn *dispatch[DISPATCH_MAX]; 38 39 void 40 dispatch_protocol_error(int type, int plen, void *ctxt) 41 { 42 error("Hm, dispatch protocol error: type %d plen %d", type, plen); 43 if (compat20 && type == SSH2_MSG_KEXINIT) 44 fatal("dispatch_protocol_error: rekeying is not supported"); 45 } 46 void 47 dispatch_init(dispatch_fn *dflt) 48 { 49 int i; 50 for (i = 0; i < DISPATCH_MAX; i++) 51 dispatch[i] = dflt; 52 } 53 void 54 dispatch_set(int type, dispatch_fn *fn) 55 { 56 dispatch[type] = fn; 57 } 58 void 59 dispatch_run(int mode, int *done, void *ctxt) 60 { 61 for (;;) { 62 int plen; 63 int type; 64 65 if (mode == DISPATCH_BLOCK) { 66 type = packet_read(&plen); 67 } else { 68 type = packet_read_poll(&plen); 69 if (type == SSH_MSG_NONE) 70 return; 71 } 72 if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL) 73 (*dispatch[type])(type, plen, ctxt); 74 else 75 packet_disconnect("protocol error: rcvd type %d", type); 76 if (done != NULL && *done) 77 return; 78 } 79 } 80