[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
 */
#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	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 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.
	14	*
	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
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	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	*/
	36	#include <sys/errno.h>
	37	#include <sys/types.h>
	38	#include <sys/param.h>
	39	#include <machine/spl.h>
	40	#include <sys/systm.h>
	41	#include <sys/kernel.h>
	42	#include <sys/proc.h>
	43	#include <sys/filedesc.h>
	44	#include <sys/fcntl.h>
	45	#include <sys/mbuf.h>
	46	#include <sys/socket.h>
	47	#include <sys/socketvar.h>
	48	#include <net/if.h>
	49
	50	#include <netat/sysglue.h>
	51	#include <netat/appletalk.h>
	52	#include <netat/at_var.h>
	53	#include <netat/routing_tables.h>
	54	#include <netat/at_pcb.h>
	55	#include <netat/aurp.h>
	56	#include <netat/debug.h>
	57
	58
91447636 A	59	/* locked version of AURPsndOpenReq */
91447636 A	60	void AURPsndOpenReq_locked(state)
1c79356b A	61	aurp_state_t *state;
1c79356b A	62	{
91447636	63	atalk_lock();
1c79356b	64	AURPsndOpenReq(state);
91447636	65	atalk_unlock();
1c79356b A	66	}
	67
	68	/* */
	69	void AURPsndOpenReq(state)
	70	aurp_state_t *state;
	71	{
	72	int msize;
	73	gbuf_t *m;
	74	aurp_hdr_t *hdrp;
	75
	76	if (aurp_gref == 0) {
	77	return;
	78	}
	79	if (state->rcv_retry && (state->rcv_state != AURPSTATE_WaitingForOpenRsp)) {
	80	return;
	81	}
	82
	83	/* stop trying if the retry count exceeds the maximum value */
	84	if (++state->rcv_retry > AURP_MaxRetry) {
	85	dPrintf(D_M_AURP, D_L_WARNING,
	86	("AURPsndOpenReq: no response, node %u\n",
	87	state->rem_node));
	88	state->rcv_state = AURPSTATE_Unconnected;
	89	state->rcv_tmo = 0;
	90	state->rcv_retry = 0;
	91	return;
	92	}
	93
	94	msize = sizeof(aurp_hdr_t) + 3;
	95	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
	96	gbuf_wset(m,msize);
	97
	98	/* construct the open request packet */
	99	hdrp = (aurp_hdr_t *)gbuf_rptr(m);
	100	if (state->rcv_retry > 1)
	101	hdrp->connection_id = state->rcv_connection_id;
	102	else {
	103	if (++rcv_connection_id == 0)
	104	rcv_connection_id = 1;
	105	hdrp->connection_id = rcv_connection_id;
	106	}
	107	hdrp->sequence_number = 0;
	108	hdrp->command_code = AURPCMD_OpenReq;
	109	hdrp->flags = (AURPFLG_NA \| AURPFLG_ND \| AURPFLG_NDC \| AURPFLG_ZC);
	110	(short )(hdrp+1) = AURP_Version;
	111	((char )(hdrp+1))[2] = 0; / option count */
	112
	113	/* update state info */
	114	state->rcv_connection_id = hdrp->connection_id;
	115	state->rcv_state = AURPSTATE_WaitingForOpenRsp;
	116
	117	/* send the packet */
	118	dPrintf(D_M_AURP, D_L_TRACE,
	119	("AURPsndOpenReq: sending AURPCMD_OpenReq, node %u\n",
	120	state->rem_node));
	121	AURPsend(m, AUD_AURP, state->rem_node);
	122	}
	123
	124	/* start the retry timer */
91447636	125	timeout(AURPsndOpenReq_locked, state, AURP_RetryInterval*HZ);
1c79356b A	126	state->rcv_tmo = 1;
	127	}
	128
	129	/* */
	130	void AURPrcvOpenReq(state, m)
	131	aurp_state_t *state;
	132	gbuf_t *m;
	133	{
	134	short rc, version;
	135	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
	136	unsigned short sui = hdrp->flags;
	137
	138	/* make sure we're in a valid state to accept it */
	139	if ((update_tmo == 0) \|\| ((state->snd_state != AURPSTATE_Unconnected) &&
	140	(state->snd_state != AURPSTATE_Connected))) {
	141	dPrintf(D_M_AURP, D_L_WARNING,
	142	("AURPrcvOpenReq: unexpected request, update_tmo=0x%x, snd_state=%u\n", (unsigned int) update_tmo, state->snd_state));
	143	gbuf_freem(m);
	144	return;
	145	}
	146
	147	/* check for the correct version number */
	148	version = (short )(hdrp+1);
	149	if (version != AURP_Version) {
	150	dPrintf(D_M_AURP, D_L_WARNING,
	151	("AURPrcvOpenReq: invalid version number %d, expected %d\n", version, AURP_Version));
	152	rc = AURPERR_InvalidVersionNumber;
	153	} else
	154	rc = (short)AURP_UpdateRate;
	155
	156	/* construct the open response packet */
	157	gbuf_wset(m,sizeof(aurp_hdr_t)+sizeof(short));
	158	hdrp->command_code = AURPCMD_OpenRsp;
	159	hdrp->flags = 0;
	160	(short )(hdrp+1) = rc;
	161	((char )(hdrp+1))[2] = 0; / option count */
	162
	163	/*
	164	* reset if we're in the Connected state and this is
	165	* a completely new open request
	166	*/
	167	if ((state->snd_state == AURPSTATE_Connected) &&
	168	((state->snd_connection_id != hdrp->connection_id) \|\|
	169	(state->snd_sequence_number != AURP_FirstSeqNum))) {
	170	extern void AURPsndTickle();
	171	if (state->rcv_state == AURPSTATE_Connected) {
	172	state->rcv_state = AURPSTATE_Unconnected;
	173	untimeout(AURPsndTickle, state);
	174	}
	175	state->snd_state = AURPSTATE_Unconnected;
	176	AURPcleanup(state);
	177	AURPpurgeri(state->rem_node);
	178	}
	179
	180	/* update state info */
	181	if (state->snd_state == AURPSTATE_Unconnected) {
	182	state->snd_state = AURPSTATE_Connected;
	183	state->snd_sui = sui;
	184	state->snd_connection_id = hdrp->connection_id;
	185	state->snd_sequence_number = AURP_FirstSeqNum;
	186	}
	187
	188	/* send the packet */
	189	AURPsend(m, AUD_AURP, state->rem_node);
190
191	/* open connection for the data receiver side if not yet connected */
192	if (state->rcv_state == AURPSTATE_Unconnected) {
193	state->rcv_retry = 0;
194	state->tickle_retry = 0;
195	state->rcv_sequence_number = 0;
196	AURPsndOpenReq(state);
197	}
198	}
199
200	/* */
201	void AURPrcvOpenRsp(state, m)
202	aurp_state_t *state;
203	gbuf_t *m;
204	{
205	extern void AURPsndTickle();
206	short rc;
207	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
208
209	/* make sure we're in a valid state to accept it */
210	if (state->rcv_state != AURPSTATE_WaitingForOpenRsp) {
211	dPrintf(D_M_AURP, D_L_WARNING,
212	("AURPrcvOpenRsp: unexpected response\n"));
213	gbuf_freem(m);
214	return;
215	}
216
217	/* check for the correct connection id */
218	if (hdrp->connection_id != state->rcv_connection_id) {
219	dPrintf(D_M_AURP, D_L_WARNING,
220	("AURPrcvOpenRsp: invalid connection id, r=%d, m=%d\n",
221	hdrp->connection_id, state->rcv_connection_id));
222	gbuf_freem(m);
223	return;
224	}
225
226	/* cancel the retry timer */
91447636	227	untimeout(AURPsndOpenReq_locked, state);
1c79356b A	228	state->rcv_tmo = 0;
	229	state->rcv_retry = 0;
	230
	231	/* update state info */
	232	state->rcv_sequence_number = AURP_FirstSeqNum;
	233	state->rcv_env = hdrp->flags;
	234
	235	/* check for error */
	236	rc = (short )(hdrp+1);
	237	gbuf_freem(m);
	238	if (rc < 0) {
	239	dPrintf(D_M_AURP, D_L_WARNING,
	240	("AURPrcvOpenRsp: error=%d\n", rc));
	241	return;
	242	}
	243
	244	/* update state info */
	245	state->rcv_update_rate = (unsigned short)rc;
	246	state->rcv_state = AURPSTATE_Connected;
	247	dPrintf(D_M_AURP, D_L_TRACE, ("AURPrcvOpenRsp: moved rcv_state to AURPSTATE_Connected\n"));
	248
	249	/* start tickle */
	250	timeout(AURPsndTickle, state, AURP_TickleRetryInterval*HZ);
	251
	252	/* get routing info */
	253	AURPsndRIReq(state);
	254	}