[openssh.git] / dispatch.c

/*
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "includes.h"
RCSID("$OpenBSD: dispatch.c,v 1.12 2001/12/20 22:50:24 djm Exp $");

#include "ssh1.h"
#include "ssh2.h"
#include "log.h"
#include "dispatch.h"
#include "packet.h"
#include "compat.h"

#define DISPATCH_MIN	0
#define DISPATCH_MAX	255

dispatch_fn *dispatch[DISPATCH_MAX];

void
dispatch_protocol_error(int type, int plen, u_int32_t seq, void *ctxt)
{
	fatal("dispatch_protocol_error: type %d seq %u plen %d", type, 
	    seq, plen);
}
void
dispatch_init(dispatch_fn *dflt)
{
	int i;
	for (i = 0; i < DISPATCH_MAX; i++)
		dispatch[i] = dflt;
}
void
dispatch_set(int type, dispatch_fn *fn)
{
	dispatch[type] = fn;
}
void
dispatch_run(int mode, int *done, void *ctxt)
{
	for (;;) {
		int plen;
		int type;
		u_int32_t seqnr;

		if (mode == DISPATCH_BLOCK) {
			type = packet_read_seqnr(&plen, &seqnr);
		} else {
			type = packet_read_poll_seqnr(&plen, &seqnr);
			if (type == SSH_MSG_NONE)
				return;
		}
		if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
			(*dispatch[type])(type, plen, seqnr, ctxt);
		else
			packet_disconnect("protocol error: rcvd type %d", type);
		if (done != NULL && *done)
			return;
	}
}
Commit	Line	Data
6ae2364d	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.
6ae2364d	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"
24ca6821	25	RCSID("$OpenBSD: dispatch.c,v 1.12 2001/12/20 22:50:24 djm Exp $");
42f11eb2	26
42f11eb2	27	#include "ssh1.h"
014beb5b	28	#include "ssh2.h"
42f11eb2	29	#include "log.h"
6ae2364d	30	#include "dispatch.h"
6ae2364d	31	#include "packet.h"
014beb5b	32	#include "compat.h"
6ae2364d	33
	34	#define DISPATCH_MIN 0
	35	#define DISPATCH_MAX 255
	36
	37	dispatch_fn *dispatch[DISPATCH_MAX];
	38
	39	void
24ca6821	40	dispatch_protocol_error(int type, int plen, u_int32_t seq, void *ctxt)
6ae2364d	41	{
24ca6821	42	fatal("dispatch_protocol_error: type %d seq %u plen %d", type,
24ca6821	43	seq, plen);
6ae2364d	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
188adeb2	58	dispatch_run(int mode, int done, void ctxt)
6ae2364d	59	{
	60	for (;;) {
	61	int plen;
	62	int type;
24ca6821	63	u_int32_t seqnr;
6ae2364d	64
6ae2364d	65	if (mode == DISPATCH_BLOCK) {
24ca6821	66	type = packet_read_seqnr(&plen, &seqnr);
6ae2364d	67	} else {
24ca6821	68	type = packet_read_poll_seqnr(&plen, &seqnr);
6ae2364d	69	if (type == SSH_MSG_NONE)
	70	return;
	71	}
	72	if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL)
24ca6821	73	(*dispatch[type])(type, plen, seqnr, ctxt);
6ae2364d	74	else
2b87da3b	75	packet_disconnect("protocol error: rcvd type %d", type);
6ae2364d	76	if (done != NULL && *done)
	77	return;
	78	}
	79	}