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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_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. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * 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_OSREFERENCE_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
 */
 
#ifdef AURP_SUPPORT

#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_pcb.h>
#include <netat/at_var.h>
#include <netat/routing_tables.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);
}

#endif  /* AURP_SUPPORT */
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 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. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* Copyright (c) 1996 Apple Computer, Inc.
	30	*
	31	* Created April 8, 1996 by Tuyen Nguyen
	32	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	33	*
	34	* File: open.c
	35	*/
0c530ab8 A	36
	37	#ifdef AURP_SUPPORT
	38
1c79356b A	39	#include <sys/errno.h>
	40	#include <sys/types.h>
	41	#include <sys/param.h>
	42	#include <machine/spl.h>
	43	#include <sys/systm.h>
	44	#include <sys/kernel.h>
	45	#include <sys/proc.h>
	46	#include <sys/filedesc.h>
	47	#include <sys/fcntl.h>
	48	#include <sys/mbuf.h>
	49	#include <sys/socket.h>
	50	#include <sys/socketvar.h>
	51	#include <net/if.h>
	52
	53	#include <netat/sysglue.h>
	54	#include <netat/appletalk.h>
2d21ac55	55	#include <netat/at_pcb.h>
1c79356b A	56	#include <netat/at_var.h>
1c79356b A	57	#include <netat/routing_tables.h>
1c79356b A	58	#include <netat/aurp.h>
	59	#include <netat/debug.h>
	60
	61
91447636 A	62	/* locked version of AURPsndOpenReq */
91447636 A	63	void AURPsndOpenReq_locked(state)
1c79356b A	64	aurp_state_t *state;
1c79356b A	65	{
91447636	66	atalk_lock();
1c79356b	67	AURPsndOpenReq(state);
91447636	68	atalk_unlock();
1c79356b A	69	}
	70
	71	/* */
	72	void AURPsndOpenReq(state)
	73	aurp_state_t *state;
	74	{
	75	int msize;
	76	gbuf_t *m;
	77	aurp_hdr_t *hdrp;
	78
	79	if (aurp_gref == 0) {
	80	return;
	81	}
	82	if (state->rcv_retry && (state->rcv_state != AURPSTATE_WaitingForOpenRsp)) {
	83	return;
	84	}
	85
	86	/* stop trying if the retry count exceeds the maximum value */
	87	if (++state->rcv_retry > AURP_MaxRetry) {
	88	dPrintf(D_M_AURP, D_L_WARNING,
	89	("AURPsndOpenReq: no response, node %u\n",
	90	state->rem_node));
	91	state->rcv_state = AURPSTATE_Unconnected;
	92	state->rcv_tmo = 0;
	93	state->rcv_retry = 0;
	94	return;
	95	}
	96
	97	msize = sizeof(aurp_hdr_t) + 3;
	98	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
	99	gbuf_wset(m,msize);
	100
	101	/* construct the open request packet */
	102	hdrp = (aurp_hdr_t *)gbuf_rptr(m);
	103	if (state->rcv_retry > 1)
	104	hdrp->connection_id = state->rcv_connection_id;
	105	else {
	106	if (++rcv_connection_id == 0)
	107	rcv_connection_id = 1;
	108	hdrp->connection_id = rcv_connection_id;
	109	}
	110	hdrp->sequence_number = 0;
	111	hdrp->command_code = AURPCMD_OpenReq;
	112	hdrp->flags = (AURPFLG_NA \| AURPFLG_ND \| AURPFLG_NDC \| AURPFLG_ZC);
	113	(short )(hdrp+1) = AURP_Version;
	114	((char )(hdrp+1))[2] = 0; / option count */
	115
	116	/* update state info */
	117	state->rcv_connection_id = hdrp->connection_id;
	118	state->rcv_state = AURPSTATE_WaitingForOpenRsp;
	119
	120	/* send the packet */
	121	dPrintf(D_M_AURP, D_L_TRACE,
	122	("AURPsndOpenReq: sending AURPCMD_OpenReq, node %u\n",
	123	state->rem_node));
	124	AURPsend(m, AUD_AURP, state->rem_node);
	125	}
	126
	127	/* start the retry timer */
91447636	128	timeout(AURPsndOpenReq_locked, state, AURP_RetryInterval*HZ);
1c79356b A	129	state->rcv_tmo = 1;
	130	}
	131
	132	/* */
	133	void AURPrcvOpenReq(state, m)
	134	aurp_state_t *state;
	135	gbuf_t *m;
	136	{
	137	short rc, version;
	138	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
	139	unsigned short sui = hdrp->flags;
	140
	141	/* make sure we're in a valid state to accept it */
	142	if ((update_tmo == 0) \|\| ((state->snd_state != AURPSTATE_Unconnected) &&
	143	(state->snd_state != AURPSTATE_Connected))) {
	144	dPrintf(D_M_AURP, D_L_WARNING,
	145	("AURPrcvOpenReq: unexpected request, update_tmo=0x%x, snd_state=%u\n", (unsigned int) update_tmo, state->snd_state));
	146	gbuf_freem(m);
	147	return;
	148	}
	149
	150	/* check for the correct version number */
	151	version = (short )(hdrp+1);
	152	if (version != AURP_Version) {
	153	dPrintf(D_M_AURP, D_L_WARNING,
	154	("AURPrcvOpenReq: invalid version number %d, expected %d\n", version, AURP_Version));
	155	rc = AURPERR_InvalidVersionNumber;
	156	} else
	157	rc = (short)AURP_UpdateRate;
	158
	159	/* construct the open response packet */
	160	gbuf_wset(m,sizeof(aurp_hdr_t)+sizeof(short));
	161	hdrp->command_code = AURPCMD_OpenRsp;
	162	hdrp->flags = 0;
	163	(short )(hdrp+1) = rc;
	164	((char )(hdrp+1))[2] = 0; / option count */
	165
	166	/*
	167	* reset if we're in the Connected state and this is
	168	* a completely new open request
	169	*/
	170	if ((state->snd_state == AURPSTATE_Connected) &&
	171	((state->snd_connection_id != hdrp->connection_id) \|\|
	172	(state->snd_sequence_number != AURP_FirstSeqNum))) {
	173	extern void AURPsndTickle();
	174	if (state->rcv_state == AURPSTATE_Connected) {
	175	state->rcv_state = AURPSTATE_Unconnected;
	176	untimeout(AURPsndTickle, state);
	177	}
	178	state->snd_state = AURPSTATE_Unconnected;
	179	AURPcleanup(state);
	180	AURPpurgeri(state->rem_node);
	181	}
	182
	183	/* update state info */
	184	if (state->snd_state == AURPSTATE_Unconnected) {
	185	state->snd_state = AURPSTATE_Connected;
	186	state->snd_sui = sui;
	187	state->snd_connection_id = hdrp->connection_id;
	188	state->snd_sequence_number = AURP_FirstSeqNum;
	189	}
	190
	191	/* send the packet */
	192	AURPsend(m, AUD_AURP, state->rem_node);
193
194	/* open connection for the data receiver side if not yet connected */
195	if (state->rcv_state == AURPSTATE_Unconnected) {
196	state->rcv_retry = 0;
197	state->tickle_retry = 0;
198	state->rcv_sequence_number = 0;
199	AURPsndOpenReq(state);
200	}
201	}
202
203	/* */
204	void AURPrcvOpenRsp(state, m)
205	aurp_state_t *state;
206	gbuf_t *m;
207	{
208	extern void AURPsndTickle();
209	short rc;
210	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
211
212	/* make sure we're in a valid state to accept it */
213	if (state->rcv_state != AURPSTATE_WaitingForOpenRsp) {
214	dPrintf(D_M_AURP, D_L_WARNING,
215	("AURPrcvOpenRsp: unexpected response\n"));
216	gbuf_freem(m);
217	return;
218	}
219
220	/* check for the correct connection id */
221	if (hdrp->connection_id != state->rcv_connection_id) {
222	dPrintf(D_M_AURP, D_L_WARNING,
223	("AURPrcvOpenRsp: invalid connection id, r=%d, m=%d\n",
224	hdrp->connection_id, state->rcv_connection_id));
225	gbuf_freem(m);
226	return;
227	}
228
229	/* cancel the retry timer */
91447636	230	untimeout(AURPsndOpenReq_locked, state);
1c79356b A	231	state->rcv_tmo = 0;
	232	state->rcv_retry = 0;
	233
	234	/* update state info */
	235	state->rcv_sequence_number = AURP_FirstSeqNum;
	236	state->rcv_env = hdrp->flags;
	237
	238	/* check for error */
	239	rc = (short )(hdrp+1);
	240	gbuf_freem(m);
	241	if (rc < 0) {
	242	dPrintf(D_M_AURP, D_L_WARNING,
	243	("AURPrcvOpenRsp: error=%d\n", rc));
	244	return;
	245	}
	246
	247	/* update state info */
	248	state->rcv_update_rate = (unsigned short)rc;
	249	state->rcv_state = AURPSTATE_Connected;
	250	dPrintf(D_M_AURP, D_L_TRACE, ("AURPrcvOpenRsp: moved rcv_state to AURPSTATE_Connected\n"));
	251
	252	/* start tickle */
	253	timeout(AURPsndTickle, state, AURP_TickleRetryInterval*HZ);
	254
	255	/* get routing info */
	256	AURPsndRIReq(state);
	257	}
0c530ab8	258
2d21ac55	259	#endif /* AURP_SUPPORT */