bsd/netat/aurp_rd.c

   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 /* */
  61 void 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 /* */
 112 void 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 */