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 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 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 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 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 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 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