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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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>


/* funnel version of AURPsndOpenReq */
void AURPsndOpenReq_funnel(state)
	aurp_state_t *state;
{
        thread_funnel_set(network_flock, TRUE);
	AURPsndOpenReq(state);
        thread_funnel_set(network_flock, FALSE);
}

/* */
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_funnel, 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_funnel, 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	*
d7e50217	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
d7e50217 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
d7e50217 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1996 Apple Computer, Inc.
	27	*
	28	* Created April 8, 1996 by Tuyen Nguyen
	29	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	30	*
	31	* File: open.c
	32	*/
	33	#include <sys/errno.h>
	34	#include <sys/types.h>
	35	#include <sys/param.h>
	36	#include <machine/spl.h>
	37	#include <sys/systm.h>
	38	#include <sys/kernel.h>
	39	#include <sys/proc.h>
	40	#include <sys/filedesc.h>
	41	#include <sys/fcntl.h>
	42	#include <sys/mbuf.h>
	43	#include <sys/socket.h>
	44	#include <sys/socketvar.h>
	45	#include <net/if.h>
	46
	47	#include <netat/sysglue.h>
	48	#include <netat/appletalk.h>
	49	#include <netat/at_var.h>
	50	#include <netat/routing_tables.h>
	51	#include <netat/at_pcb.h>
	52	#include <netat/aurp.h>
	53	#include <netat/debug.h>
	54
	55
	56	/* funnel version of AURPsndOpenReq */
	57	void AURPsndOpenReq_funnel(state)
	58	aurp_state_t *state;
	59	{
	60	thread_funnel_set(network_flock, TRUE);
	61	AURPsndOpenReq(state);
	62	thread_funnel_set(network_flock, FALSE);
	63	}
	64
	65	/* */
	66	void AURPsndOpenReq(state)
	67	aurp_state_t *state;
	68	{
	69	int msize;
	70	gbuf_t *m;
	71	aurp_hdr_t *hdrp;
	72
	73	if (aurp_gref == 0) {
	74	return;
	75	}
	76	if (state->rcv_retry && (state->rcv_state != AURPSTATE_WaitingForOpenRsp)) {
	77	return;
	78	}
	79
	80	/* stop trying if the retry count exceeds the maximum value */
	81	if (++state->rcv_retry > AURP_MaxRetry) {
	82	dPrintf(D_M_AURP, D_L_WARNING,
	83	("AURPsndOpenReq: no response, node %u\n",
	84	state->rem_node));
	85	state->rcv_state = AURPSTATE_Unconnected;
86	state->rcv_tmo = 0;
87	state->rcv_retry = 0;
88	return;
89	}
90
91	msize = sizeof(aurp_hdr_t) + 3;
92	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
93	gbuf_wset(m,msize);
94
95	/* construct the open request packet */
96	hdrp = (aurp_hdr_t *)gbuf_rptr(m);
97	if (state->rcv_retry > 1)
98	hdrp->connection_id = state->rcv_connection_id;
99	else {
100	if (++rcv_connection_id == 0)
101	rcv_connection_id = 1;
102	hdrp->connection_id = rcv_connection_id;
103	}
104	hdrp->sequence_number = 0;
105	hdrp->command_code = AURPCMD_OpenReq;
106	hdrp->flags = (AURPFLG_NA \| AURPFLG_ND \| AURPFLG_NDC \| AURPFLG_ZC);
107	(short )(hdrp+1) = AURP_Version;
108	((char )(hdrp+1))[2] = 0; / option count */
109
110	/* update state info */
111	state->rcv_connection_id = hdrp->connection_id;
112	state->rcv_state = AURPSTATE_WaitingForOpenRsp;
113
114	/* send the packet */
115	dPrintf(D_M_AURP, D_L_TRACE,
116	("AURPsndOpenReq: sending AURPCMD_OpenReq, node %u\n",
117	state->rem_node));
118	AURPsend(m, AUD_AURP, state->rem_node);
119	}
120
121	/* start the retry timer */
122	timeout(AURPsndOpenReq_funnel, state, AURP_RetryInterval*HZ);
123	state->rcv_tmo = 1;
124	}
125
126	/* */
127	void AURPrcvOpenReq(state, m)
128	aurp_state_t *state;
129	gbuf_t *m;
130	{
131	short rc, version;
132	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
133	unsigned short sui = hdrp->flags;
134
135	/* make sure we're in a valid state to accept it */
136	if ((update_tmo == 0) \|\| ((state->snd_state != AURPSTATE_Unconnected) &&
137	(state->snd_state != AURPSTATE_Connected))) {
138	dPrintf(D_M_AURP, D_L_WARNING,
139	("AURPrcvOpenReq: unexpected request, update_tmo=0x%x, snd_state=%u\n", (unsigned int) update_tmo, state->snd_state));
140	gbuf_freem(m);
141	return;
142	}
143
144	/* check for the correct version number */
145	version = (short )(hdrp+1);
146	if (version != AURP_Version) {
147	dPrintf(D_M_AURP, D_L_WARNING,
148	("AURPrcvOpenReq: invalid version number %d, expected %d\n", version, AURP_Version));
149	rc = AURPERR_InvalidVersionNumber;
150	} else
151	rc = (short)AURP_UpdateRate;
152
153	/* construct the open response packet */
154	gbuf_wset(m,sizeof(aurp_hdr_t)+sizeof(short));
155	hdrp->command_code = AURPCMD_OpenRsp;
156	hdrp->flags = 0;
157	(short )(hdrp+1) = rc;
158	((char )(hdrp+1))[2] = 0; / option count */
159
160	/*
161	* reset if we're in the Connected state and this is
162	* a completely new open request
163	*/
164	if ((state->snd_state == AURPSTATE_Connected) &&
165	((state->snd_connection_id != hdrp->connection_id) \|\|
166	(state->snd_sequence_number != AURP_FirstSeqNum))) {
167	extern void AURPsndTickle();
168	if (state->rcv_state == AURPSTATE_Connected) {
169	state->rcv_state = AURPSTATE_Unconnected;
170	untimeout(AURPsndTickle, state);
171	}
172	state->snd_state = AURPSTATE_Unconnected;
173	AURPcleanup(state);
174	AURPpurgeri(state->rem_node);
175	}
176
177	/* update state info */
178	if (state->snd_state == AURPSTATE_Unconnected) {
179	state->snd_state = AURPSTATE_Connected;
180	state->snd_sui = sui;
181	state->snd_connection_id = hdrp->connection_id;
182	state->snd_sequence_number = AURP_FirstSeqNum;
183	}
184
185	/* send the packet */
186	AURPsend(m, AUD_AURP, state->rem_node);
187
188	/* open connection for the data receiver side if not yet connected */
189	if (state->rcv_state == AURPSTATE_Unconnected) {
190	state->rcv_retry = 0;
191	state->tickle_retry = 0;
192	state->rcv_sequence_number = 0;
193	AURPsndOpenReq(state);
194	}
195	}
196
197	/* */
198	void AURPrcvOpenRsp(state, m)
199	aurp_state_t *state;
200	gbuf_t *m;
201	{
202	extern void AURPsndTickle();
203	short rc;
204	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
205
206	/* make sure we're in a valid state to accept it */
207	if (state->rcv_state != AURPSTATE_WaitingForOpenRsp) {
208	dPrintf(D_M_AURP, D_L_WARNING,
209	("AURPrcvOpenRsp: unexpected response\n"));
210	gbuf_freem(m);
211	return;
212	}
213
214	/* check for the correct connection id */
215	if (hdrp->connection_id != state->rcv_connection_id) {
216	dPrintf(D_M_AURP, D_L_WARNING,
217	("AURPrcvOpenRsp: invalid connection id, r=%d, m=%d\n",
218	hdrp->connection_id, state->rcv_connection_id));
219	gbuf_freem(m);
220	return;
221	}
222
223	/* cancel the retry timer */
224	untimeout(AURPsndOpenReq_funnel, state);
225	state->rcv_tmo = 0;
226	state->rcv_retry = 0;
227
228	/* update state info */
229	state->rcv_sequence_number = AURP_FirstSeqNum;
230	state->rcv_env = hdrp->flags;
231
232	/* check for error */
233	rc = (short )(hdrp+1);
234	gbuf_freem(m);
235	if (rc < 0) {
236	dPrintf(D_M_AURP, D_L_WARNING,
237	("AURPrcvOpenRsp: error=%d\n", rc));
238	return;
239	}
240
241	/* update state info */
242	state->rcv_update_rate = (unsigned short)rc;
243	state->rcv_state = AURPSTATE_Connected;
244	dPrintf(D_M_AURP, D_L_TRACE, ("AURPrcvOpenRsp: moved rcv_state to AURPSTATE_Connected\n"));
245
246	/* start tickle */
247	timeout(AURPsndTickle, state, AURP_TickleRetryInterval*HZ);
248
249	/* get routing info */
250	AURPsndRIReq(state);
251	}