1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
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
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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: rd.c
35 */
36
37#ifdef AURP_SUPPORT
38
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>
55#include <netat/at_pcb.h>
56#include <netat/at_var.h>
57#include <netat/routing_tables.h>
58#include <netat/aurp.h>
59
60/* */
61void AURPsndRDReq(state)
62	aurp_state_t *state;
63{
64	int msize;
65	gbuf_t *m;
66	aurp_hdr_t *hdrp;
67
68	if ((state->rcv_state == AURPSTATE_Unconnected) ||
69			(state->snd_state == AURPSTATE_Unconnected))
70		return;
71
72	/* update state info */
73	state->rcv_state = AURPSTATE_Unconnected;
74	state->snd_state = AURPSTATE_Unconnected;
75
76	/* notify tunnel peer of router going-down for the data receiver side */
77	msize = sizeof(aurp_hdr_t) + sizeof(short);
78	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
79		gbuf_wset(m,msize);
80
81		/* construct the router down packet */
82		hdrp = (aurp_hdr_t *)gbuf_rptr(m);
83		hdrp->connection_id = state->rcv_connection_id;
84		hdrp->sequence_number = 0;
85		hdrp->command_code = AURPCMD_RDReq;
86		hdrp->flags = 0;
87		*(short *)(hdrp+1) = AURPERR_NormalConnectionClose;
88
89		/* send the packet */
90		AURPsend(m, AUD_AURP, state->rem_node);
91	}
92
93	/* notify tunnel peer of router going-down for the data sender side */
94	msize = sizeof(aurp_hdr_t) + sizeof(short);
95	if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) {
96		gbuf_wset(m,msize);
97
98		/* construct the router down packet */
99		hdrp = (aurp_hdr_t *)gbuf_rptr(m);
100		hdrp->connection_id = state->snd_connection_id;
101		hdrp->sequence_number = state->snd_sequence_number;
102		hdrp->command_code = AURPCMD_RDReq;
103		hdrp->flags = 0;
104		*(short *)(hdrp+1) = AURPERR_NormalConnectionClose;
105
106		/* send the packet */
107		AURPsend(m, AUD_AURP, state->rem_node);
108	}
109}
110
111/* */
112void AURPrcvRDReq(state, m)
113	aurp_state_t *state;
114	gbuf_t *m;
115{
116	/* update state info */
117	state->rcv_state = AURPSTATE_Unconnected;
118	state->snd_state = AURPSTATE_Unconnected;
119	AURPcleanup(state);
120
121	/* purge all routes associated with the tunnel peer going-down */
122	AURPpurgeri(state->rem_node);
123
124	/* respond to the going-down peer with an RI Ack packet */
125	AURPsndRIAck(state, m, 0);
126}
127
128#endif  /* AURP_SUPPORT */
129