[apple/xnu.git] / bsd / netat / aurp_open.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *	Copyright (c) 1996 Apple Computer, Inc. 
 *
 *		Created April 8, 1996 by Tuyen Nguyen
 *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
 *
 *	File: open.c
 */
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <machine/spl.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/fcntl.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>

#include <netat/sysglue.h>
#include <netat/appletalk.h>
#include <netat/at_var.h>
#include <netat/routing_tables.h>
#include <netat/at_pcb.h>
#include <netat/aurp.h>
#include <netat/debug.h>


/* locked version of AURPsndOpenReq */
void AURPsndOpenReq_locked(state)
	aurp_state_t *state;
{
	atalk_lock();
	AURPsndOpenReq(state);
	atalk_unlock();
}

/* */
void AURPsndOpenReq(state)
	aurp_state_t *state;
{
	int msize;
	gbuf_t *m;
	aurp_hdr_t *hdrp;

	if (aurp_gref == 0) {
		return;
        }
	if (state->rcv_retry && (state->rcv_state != AURPSTATE_WaitingForOpenRsp)) {
		return;
        }

	/* stop trying if the retry count exceeds the maximum value */
	if (++state->rcv_retry > AURP_MaxRetry) {
		dPrintf(D_M_AURP, D_L_WARNING,
			("AURPsndOpenReq: no response, node %u\n",
			state->rem_node));
		state->rcv_state = AURPSTATE_Unconnected;
		state->rcv_tmo = 0;
		state->rcv_retry = 0;
		return;
	}

	msize = sizeof(aurp_hdr_t) + 3;
	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
		gbuf_wset(m,msize);

		/* construct the open request packet */
		hdrp = (aurp_hdr_t *)gbuf_rptr(m);
		if (state->rcv_retry > 1)
			hdrp->connection_id = state->rcv_connection_id;
		else {
			if (++rcv_connection_id == 0)
				rcv_connection_id = 1;
			hdrp->connection_id = rcv_connection_id;
		}
		hdrp->sequence_number = 0;
		hdrp->command_code = AURPCMD_OpenReq;
		hdrp->flags = (AURPFLG_NA | AURPFLG_ND | AURPFLG_NDC | AURPFLG_ZC);
		*(short *)(hdrp+1) = AURP_Version;
		((char *)(hdrp+1))[2] = 0; /* option count */

		/* update state info */
		state->rcv_connection_id = hdrp->connection_id;
		state->rcv_state = AURPSTATE_WaitingForOpenRsp;

		/* send the packet */
		dPrintf(D_M_AURP, D_L_TRACE,
			("AURPsndOpenReq: sending AURPCMD_OpenReq, node %u\n",
			state->rem_node));
		AURPsend(m, AUD_AURP, state->rem_node);
	}

	/* start the retry timer */
	timeout(AURPsndOpenReq_locked, state, AURP_RetryInterval*HZ);
	state->rcv_tmo = 1;
}

/* */
void AURPrcvOpenReq(state, m)
	aurp_state_t *state;
	gbuf_t *m;
{
	short rc, version;
	aurp_hdr_t *hdrp = (aurp_hdr_t *)gbuf_rptr(m);
	unsigned short sui = hdrp->flags;

	/* make sure we're in a valid state to accept it */
	if ((update_tmo == 0) || ((state->snd_state != AURPSTATE_Unconnected) &&
			(state->snd_state != AURPSTATE_Connected))) {
		dPrintf(D_M_AURP, D_L_WARNING,
			("AURPrcvOpenReq: unexpected request, update_tmo=0x%x, snd_state=%u\n", (unsigned int) update_tmo, state->snd_state));
		gbuf_freem(m);
		return;
	}

	/* check for the correct version number */
	version = *(short *)(hdrp+1);
	if (version != AURP_Version) {
		dPrintf(D_M_AURP, D_L_WARNING,
			("AURPrcvOpenReq: invalid version number %d, expected %d\n", version, AURP_Version));
		rc = AURPERR_InvalidVersionNumber;
	} else
		rc = (short)AURP_UpdateRate;

	/* construct the open response packet */
	gbuf_wset(m,sizeof(aurp_hdr_t)+sizeof(short));
	hdrp->command_code = AURPCMD_OpenRsp;
	hdrp->flags = 0;
	*(short *)(hdrp+1) = rc;
	((char *)(hdrp+1))[2] = 0; /* option count */

	/*
	 * reset if we're in the Connected state and this is
	 * a completely new open request
	 */
	if ((state->snd_state == AURPSTATE_Connected) &&
		((state->snd_connection_id != hdrp->connection_id) ||
			(state->snd_sequence_number != AURP_FirstSeqNum))) {
		extern void AURPsndTickle();
		if (state->rcv_state == AURPSTATE_Connected) {
			state->rcv_state = AURPSTATE_Unconnected;
			untimeout(AURPsndTickle, state);
		}
		state->snd_state = AURPSTATE_Unconnected;
		AURPcleanup(state);
		AURPpurgeri(state->rem_node);
	}

	/* update state info */
	if (state->snd_state == AURPSTATE_Unconnected) {
		state->snd_state = AURPSTATE_Connected;
		state->snd_sui = sui;
		state->snd_connection_id = hdrp->connection_id;
		state->snd_sequence_number = AURP_FirstSeqNum;
	}

	/* send the packet */
	AURPsend(m, AUD_AURP, state->rem_node);

	/* open connection for the data receiver side if not yet connected */
	if (state->rcv_state == AURPSTATE_Unconnected) {
		state->rcv_retry = 0;
		state->tickle_retry = 0;
		state->rcv_sequence_number = 0;
		AURPsndOpenReq(state);
	}
}

/* */
void AURPrcvOpenRsp(state, m)
	aurp_state_t *state;
	gbuf_t *m;
{
	extern void AURPsndTickle();
	short rc;
	aurp_hdr_t *hdrp = (aurp_hdr_t *)gbuf_rptr(m);

	/* make sure we're in a valid state to accept it */
	if (state->rcv_state != AURPSTATE_WaitingForOpenRsp) {
		dPrintf(D_M_AURP, D_L_WARNING,
			("AURPrcvOpenRsp: unexpected response\n"));
		gbuf_freem(m);
		return;
	}

	/* check for the correct connection id */
	if (hdrp->connection_id != state->rcv_connection_id) {
		dPrintf(D_M_AURP, D_L_WARNING,
			("AURPrcvOpenRsp: invalid connection id, r=%d, m=%d\n",
			hdrp->connection_id, state->rcv_connection_id));
		gbuf_freem(m);
		return;
	}

	/* cancel the retry timer */
	untimeout(AURPsndOpenReq_locked, state);
	state->rcv_tmo = 0;
	state->rcv_retry = 0;

	/* update state info */
	state->rcv_sequence_number = AURP_FirstSeqNum;
	state->rcv_env = hdrp->flags;

	/* check for error */
	rc = *(short *)(hdrp+1);
	gbuf_freem(m);
	if (rc < 0) {
		dPrintf(D_M_AURP, D_L_WARNING,
			("AURPrcvOpenRsp: error=%d\n", rc));
		return;
	}

	/* update state info */
	state->rcv_update_rate = (unsigned short)rc;
	state->rcv_state = AURPSTATE_Connected;
	dPrintf(D_M_AURP, D_L_TRACE, ("AURPrcvOpenRsp: moved rcv_state to AURPSTATE_Connected\n"));

	/* start tickle */
	timeout(AURPsndTickle, state, AURP_TickleRetryInterval*HZ);

	/* get routing info */
	AURPsndRIReq(state);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
ff6e181a A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
1c79356b	12	*
ff6e181a A	13	* The Original Code and all software distributed under the License are
ff6e181a A	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
ff6e181a A	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
1c79356b A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright (c) 1996 Apple Computer, Inc.
	25	*
	26	* Created April 8, 1996 by Tuyen Nguyen
	27	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	28	*
	29	* File: open.c
	30	*/
	31	#include <sys/errno.h>
	32	#include <sys/types.h>
	33	#include <sys/param.h>
	34	#include <machine/spl.h>
	35	#include <sys/systm.h>
	36	#include <sys/kernel.h>
	37	#include <sys/proc.h>
	38	#include <sys/filedesc.h>
	39	#include <sys/fcntl.h>
	40	#include <sys/mbuf.h>
	41	#include <sys/socket.h>
	42	#include <sys/socketvar.h>
	43	#include <net/if.h>
	44
	45	#include <netat/sysglue.h>
	46	#include <netat/appletalk.h>
	47	#include <netat/at_var.h>
	48	#include <netat/routing_tables.h>
	49	#include <netat/at_pcb.h>
	50	#include <netat/aurp.h>
	51	#include <netat/debug.h>
	52
	53
91447636 A	54	/* locked version of AURPsndOpenReq */
91447636 A	55	void AURPsndOpenReq_locked(state)
1c79356b A	56	aurp_state_t *state;
1c79356b A	57	{
91447636	58	atalk_lock();
1c79356b	59	AURPsndOpenReq(state);
91447636	60	atalk_unlock();
1c79356b A	61	}
	62
	63	/* */
	64	void AURPsndOpenReq(state)
	65	aurp_state_t *state;
	66	{
	67	int msize;
	68	gbuf_t *m;
	69	aurp_hdr_t *hdrp;
	70
	71	if (aurp_gref == 0) {
	72	return;
	73	}
	74	if (state->rcv_retry && (state->rcv_state != AURPSTATE_WaitingForOpenRsp)) {
	75	return;
	76	}
	77
	78	/* stop trying if the retry count exceeds the maximum value */
	79	if (++state->rcv_retry > AURP_MaxRetry) {
	80	dPrintf(D_M_AURP, D_L_WARNING,
	81	("AURPsndOpenReq: no response, node %u\n",
	82	state->rem_node));
	83	state->rcv_state = AURPSTATE_Unconnected;
	84	state->rcv_tmo = 0;
	85	state->rcv_retry = 0;
	86	return;
	87	}
	88
	89	msize = sizeof(aurp_hdr_t) + 3;
	90	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
	91	gbuf_wset(m,msize);
	92
	93	/* construct the open request packet */
	94	hdrp = (aurp_hdr_t *)gbuf_rptr(m);
	95	if (state->rcv_retry > 1)
	96	hdrp->connection_id = state->rcv_connection_id;
	97	else {
	98	if (++rcv_connection_id == 0)
	99	rcv_connection_id = 1;
	100	hdrp->connection_id = rcv_connection_id;
	101	}
	102	hdrp->sequence_number = 0;
	103	hdrp->command_code = AURPCMD_OpenReq;
	104	hdrp->flags = (AURPFLG_NA \| AURPFLG_ND \| AURPFLG_NDC \| AURPFLG_ZC);
	105	(short )(hdrp+1) = AURP_Version;
	106	((char )(hdrp+1))[2] = 0; / option count */
	107
	108	/* update state info */
	109	state->rcv_connection_id = hdrp->connection_id;
	110	state->rcv_state = AURPSTATE_WaitingForOpenRsp;
	111
	112	/* send the packet */
	113	dPrintf(D_M_AURP, D_L_TRACE,
	114	("AURPsndOpenReq: sending AURPCMD_OpenReq, node %u\n",
	115	state->rem_node));
	116	AURPsend(m, AUD_AURP, state->rem_node);
	117	}
	118
	119	/* start the retry timer */
91447636	120	timeout(AURPsndOpenReq_locked, state, AURP_RetryInterval*HZ);
1c79356b A	121	state->rcv_tmo = 1;
	122	}
	123
	124	/* */
	125	void AURPrcvOpenReq(state, m)
	126	aurp_state_t *state;
	127	gbuf_t *m;
	128	{
	129	short rc, version;
	130	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
	131	unsigned short sui = hdrp->flags;
	132
	133	/* make sure we're in a valid state to accept it */
	134	if ((update_tmo == 0) \|\| ((state->snd_state != AURPSTATE_Unconnected) &&
	135	(state->snd_state != AURPSTATE_Connected))) {
	136	dPrintf(D_M_AURP, D_L_WARNING,
	137	("AURPrcvOpenReq: unexpected request, update_tmo=0x%x, snd_state=%u\n", (unsigned int) update_tmo, state->snd_state));
	138	gbuf_freem(m);
	139	return;
	140	}
	141
	142	/* check for the correct version number */
	143	version = (short )(hdrp+1);
	144	if (version != AURP_Version) {
	145	dPrintf(D_M_AURP, D_L_WARNING,
	146	("AURPrcvOpenReq: invalid version number %d, expected %d\n", version, AURP_Version));
	147	rc = AURPERR_InvalidVersionNumber;
	148	} else
	149	rc = (short)AURP_UpdateRate;
	150
	151	/* construct the open response packet */
	152	gbuf_wset(m,sizeof(aurp_hdr_t)+sizeof(short));
	153	hdrp->command_code = AURPCMD_OpenRsp;
	154	hdrp->flags = 0;
	155	(short )(hdrp+1) = rc;
	156	((char )(hdrp+1))[2] = 0; / option count */
	157
	158	/*
	159	* reset if we're in the Connected state and this is
	160	* a completely new open request
	161	*/
	162	if ((state->snd_state == AURPSTATE_Connected) &&
	163	((state->snd_connection_id != hdrp->connection_id) \|\|
	164	(state->snd_sequence_number != AURP_FirstSeqNum))) {
	165	extern void AURPsndTickle();
	166	if (state->rcv_state == AURPSTATE_Connected) {
	167	state->rcv_state = AURPSTATE_Unconnected;
	168	untimeout(AURPsndTickle, state);
	169	}
	170	state->snd_state = AURPSTATE_Unconnected;
	171	AURPcleanup(state);
	172	AURPpurgeri(state->rem_node);
	173	}
	174
	175	/* update state info */
	176	if (state->snd_state == AURPSTATE_Unconnected) {
	177	state->snd_state = AURPSTATE_Connected;
	178	state->snd_sui = sui;
	179	state->snd_connection_id = hdrp->connection_id;
	180	state->snd_sequence_number = AURP_FirstSeqNum;
	181	}
	182
	183	/* send the packet */
	184	AURPsend(m, AUD_AURP, state->rem_node);
185
186	/* open connection for the data receiver side if not yet connected */
187	if (state->rcv_state == AURPSTATE_Unconnected) {
188	state->rcv_retry = 0;
189	state->tickle_retry = 0;
190	state->rcv_sequence_number = 0;
191	AURPsndOpenReq(state);
192	}
193	}
194
195	/* */
196	void AURPrcvOpenRsp(state, m)
197	aurp_state_t *state;
198	gbuf_t *m;
199	{
200	extern void AURPsndTickle();
201	short rc;
202	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
203
204	/* make sure we're in a valid state to accept it */
205	if (state->rcv_state != AURPSTATE_WaitingForOpenRsp) {
206	dPrintf(D_M_AURP, D_L_WARNING,
207	("AURPrcvOpenRsp: unexpected response\n"));
208	gbuf_freem(m);
209	return;
210	}
211
212	/* check for the correct connection id */
213	if (hdrp->connection_id != state->rcv_connection_id) {
214	dPrintf(D_M_AURP, D_L_WARNING,
215	("AURPrcvOpenRsp: invalid connection id, r=%d, m=%d\n",
216	hdrp->connection_id, state->rcv_connection_id));
217	gbuf_freem(m);
218	return;
219	}
220
221	/* cancel the retry timer */
91447636	222	untimeout(AURPsndOpenReq_locked, state);
1c79356b A	223	state->rcv_tmo = 0;
	224	state->rcv_retry = 0;
	225
	226	/* update state info */
	227	state->rcv_sequence_number = AURP_FirstSeqNum;
	228	state->rcv_env = hdrp->flags;
	229
	230	/* check for error */
	231	rc = (short )(hdrp+1);
	232	gbuf_freem(m);
	233	if (rc < 0) {
	234	dPrintf(D_M_AURP, D_L_WARNING,
	235	("AURPrcvOpenRsp: error=%d\n", rc));
	236	return;
	237	}
	238
	239	/* update state info */
	240	state->rcv_update_rate = (unsigned short)rc;
	241	state->rcv_state = AURPSTATE_Connected;
	242	dPrintf(D_M_AURP, D_L_TRACE, ("AURPrcvOpenRsp: moved rcv_state to AURPSTATE_Connected\n"));
	243
	244	/* start tickle */
	245	timeout(AURPsndTickle, state, AURP_TickleRetryInterval*HZ);
	246
	247	/* get routing info */
	248	AURPsndRIReq(state);
	249	}