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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 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	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1996 Apple Computer, Inc.
	24	*
	25	* Created April 8, 1996 by Tuyen Nguyen
	26	* Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
	27	*
	28	* File: open.c
	29	*/
	30	#include <sys/errno.h>
	31	#include <sys/types.h>
	32	#include <sys/param.h>
	33	#include <machine/spl.h>
	34	#include <sys/systm.h>
	35	#include <sys/kernel.h>
	36	#include <sys/proc.h>
	37	#include <sys/filedesc.h>
	38	#include <sys/fcntl.h>
	39	#include <sys/mbuf.h>
	40	#include <sys/socket.h>
	41	#include <sys/socketvar.h>
	42	#include <net/if.h>
	43
	44	#include <netat/sysglue.h>
	45	#include <netat/appletalk.h>
	46	#include <netat/at_var.h>
	47	#include <netat/routing_tables.h>
	48	#include <netat/at_pcb.h>
	49	#include <netat/aurp.h>
	50	#include <netat/debug.h>
	51
	52
	53	/* funnel version of AURPsndOpenReq */
	54	void AURPsndOpenReq_funnel(state)
	55	aurp_state_t *state;
	56	{
	57	thread_funnel_set(network_flock, TRUE);
	58	AURPsndOpenReq(state);
	59	thread_funnel_set(network_flock, FALSE);
	60	}
	61
	62	/* */
	63	void AURPsndOpenReq(state)
	64	aurp_state_t *state;
65	{
66	int msize;
67	gbuf_t *m;
68	aurp_hdr_t *hdrp;
69
70	if (aurp_gref == 0) {
71	return;
72	}
73	if (state->rcv_retry && (state->rcv_state != AURPSTATE_WaitingForOpenRsp)) {
74	return;
75	}
76
77	/* stop trying if the retry count exceeds the maximum value */
78	if (++state->rcv_retry > AURP_MaxRetry) {
79	dPrintf(D_M_AURP, D_L_WARNING,
80	("AURPsndOpenReq: no response, node %u\n",
81	state->rem_node));
82	state->rcv_state = AURPSTATE_Unconnected;
83	state->rcv_tmo = 0;
84	state->rcv_retry = 0;
85	return;
86	}
87
88	msize = sizeof(aurp_hdr_t) + 3;
89	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
90	gbuf_wset(m,msize);
91
92	/* construct the open request packet */
93	hdrp = (aurp_hdr_t *)gbuf_rptr(m);
94	if (state->rcv_retry > 1)
95	hdrp->connection_id = state->rcv_connection_id;
96	else {
97	if (++rcv_connection_id == 0)
98	rcv_connection_id = 1;
99	hdrp->connection_id = rcv_connection_id;
100	}
101	hdrp->sequence_number = 0;
102	hdrp->command_code = AURPCMD_OpenReq;
103	hdrp->flags = (AURPFLG_NA \| AURPFLG_ND \| AURPFLG_NDC \| AURPFLG_ZC);
104	(short )(hdrp+1) = AURP_Version;
105	((char )(hdrp+1))[2] = 0; / option count */
106
107	/* update state info */
108	state->rcv_connection_id = hdrp->connection_id;
109	state->rcv_state = AURPSTATE_WaitingForOpenRsp;
110
111	/* send the packet */
112	dPrintf(D_M_AURP, D_L_TRACE,
113	("AURPsndOpenReq: sending AURPCMD_OpenReq, node %u\n",
114	state->rem_node));
115	AURPsend(m, AUD_AURP, state->rem_node);
116	}
117
118	/* start the retry timer */
119	timeout(AURPsndOpenReq_funnel, state, AURP_RetryInterval*HZ);
120	state->rcv_tmo = 1;
121	}
122
123	/* */
124	void AURPrcvOpenReq(state, m)
125	aurp_state_t *state;
126	gbuf_t *m;
127	{
128	short rc, version;
129	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
130	unsigned short sui = hdrp->flags;
131
132	/* make sure we're in a valid state to accept it */
133	if ((update_tmo == 0) \|\| ((state->snd_state != AURPSTATE_Unconnected) &&
134	(state->snd_state != AURPSTATE_Connected))) {
135	dPrintf(D_M_AURP, D_L_WARNING,
136	("AURPrcvOpenReq: unexpected request, update_tmo=0x%x, snd_state=%u\n", (unsigned int) update_tmo, state->snd_state));
137	gbuf_freem(m);
138	return;
139	}
140
141	/* check for the correct version number */
142	version = (short )(hdrp+1);
143	if (version != AURP_Version) {
144	dPrintf(D_M_AURP, D_L_WARNING,
145	("AURPrcvOpenReq: invalid version number %d, expected %d\n", version, AURP_Version));
146	rc = AURPERR_InvalidVersionNumber;
147	} else
148	rc = (short)AURP_UpdateRate;
149
150	/* construct the open response packet */
151	gbuf_wset(m,sizeof(aurp_hdr_t)+sizeof(short));
152	hdrp->command_code = AURPCMD_OpenRsp;
153	hdrp->flags = 0;
154	(short )(hdrp+1) = rc;
155	((char )(hdrp+1))[2] = 0; / option count */
156
157	/*
158	* reset if we're in the Connected state and this is
159	* a completely new open request
160	*/
161	if ((state->snd_state == AURPSTATE_Connected) &&
162	((state->snd_connection_id != hdrp->connection_id) \|\|
163	(state->snd_sequence_number != AURP_FirstSeqNum))) {
164	extern void AURPsndTickle();
165	if (state->rcv_state == AURPSTATE_Connected) {
166	state->rcv_state = AURPSTATE_Unconnected;
167	untimeout(AURPsndTickle, state);
168	}
169	state->snd_state = AURPSTATE_Unconnected;
170	AURPcleanup(state);
171	AURPpurgeri(state->rem_node);
172	}
173
174	/* update state info */
175	if (state->snd_state == AURPSTATE_Unconnected) {
176	state->snd_state = AURPSTATE_Connected;
177	state->snd_sui = sui;
178	state->snd_connection_id = hdrp->connection_id;
179	state->snd_sequence_number = AURP_FirstSeqNum;
180	}
181
182	/* send the packet */
183	AURPsend(m, AUD_AURP, state->rem_node);
184
185	/* open connection for the data receiver side if not yet connected */
186	if (state->rcv_state == AURPSTATE_Unconnected) {
187	state->rcv_retry = 0;
188	state->tickle_retry = 0;
189	state->rcv_sequence_number = 0;
190	AURPsndOpenReq(state);
191	}
192	}
193
194	/* */
195	void AURPrcvOpenRsp(state, m)
196	aurp_state_t *state;
197	gbuf_t *m;
198	{
199	extern void AURPsndTickle();
200	short rc;
201	aurp_hdr_t hdrp = (aurp_hdr_t )gbuf_rptr(m);
202
203	/* make sure we're in a valid state to accept it */
204	if (state->rcv_state != AURPSTATE_WaitingForOpenRsp) {
205	dPrintf(D_M_AURP, D_L_WARNING,
206	("AURPrcvOpenRsp: unexpected response\n"));
207	gbuf_freem(m);
208	return;
209	}
210
211	/* check for the correct connection id */
212	if (hdrp->connection_id != state->rcv_connection_id) {
213	dPrintf(D_M_AURP, D_L_WARNING,
214	("AURPrcvOpenRsp: invalid connection id, r=%d, m=%d\n",
215	hdrp->connection_id, state->rcv_connection_id));
216	gbuf_freem(m);
217	return;
218	}
219
220	/* cancel the retry timer */
221	untimeout(AURPsndOpenReq_funnel, state);
222	state->rcv_tmo = 0;
223	state->rcv_retry = 0;
224
225	/* update state info */
226	state->rcv_sequence_number = AURP_FirstSeqNum;
227	state->rcv_env = hdrp->flags;
228
229	/* check for error */
230	rc = (short )(hdrp+1);
231	gbuf_freem(m);
232	if (rc < 0) {
233	dPrintf(D_M_AURP, D_L_WARNING,
234	("AURPrcvOpenRsp: error=%d\n", rc));
235	return;
236	}
237
238	/* update state info */
239	state->rcv_update_rate = (unsigned short)rc;
240	state->rcv_state = AURPSTATE_Connected;
241	dPrintf(D_M_AURP, D_L_TRACE, ("AURPrcvOpenRsp: moved rcv_state to AURPSTATE_Connected\n"));
242
243	/* start tickle */
244	timeout(AURPsndTickle, state, AURP_TickleRetryInterval*HZ);
245
246	/* get routing info */
247	AURPsndRIReq(state);
248	}