Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | /* * 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: rd.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> /* */ void AURPsndRDReq(state) aurp_state_t *state; { int msize; gbuf_t *m; aurp_hdr_t *hdrp; if ((state->rcv_state == AURPSTATE_Unconnected) || (state->snd_state == AURPSTATE_Unconnected)) return; /* update state info */ state->rcv_state = AURPSTATE_Unconnected; state->snd_state = AURPSTATE_Unconnected; /* notify tunnel peer of router going-down for the data receiver side */ msize = sizeof(aurp_hdr_t) + sizeof(short); if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) { gbuf_wset(m,msize); /* construct the router down packet */ hdrp = (aurp_hdr_t *)gbuf_rptr(m); hdrp->connection_id = state->rcv_connection_id; hdrp->sequence_number = 0; hdrp->command_code = AURPCMD_RDReq; hdrp->flags = 0; *(short *)(hdrp+1) = AURPERR_NormalConnectionClose; /* send the packet */ AURPsend(m, AUD_AURP, state->rem_node); } /* notify tunnel peer of router going-down for the data sender side */ msize = sizeof(aurp_hdr_t) + sizeof(short); if ((m = (gbuf_t *)gbuf_alloc(msize, PRI_MED)) != 0) { gbuf_wset(m,msize); /* construct the router down packet */ hdrp = (aurp_hdr_t *)gbuf_rptr(m); hdrp->connection_id = state->snd_connection_id; hdrp->sequence_number = state->snd_sequence_number; hdrp->command_code = AURPCMD_RDReq; hdrp->flags = 0; *(short *)(hdrp+1) = AURPERR_NormalConnectionClose; /* send the packet */ AURPsend(m, AUD_AURP, state->rem_node); } } /* */ void AURPrcvRDReq(state, m) aurp_state_t *state; gbuf_t *m; { /* update state info */ state->rcv_state = AURPSTATE_Unconnected; state->snd_state = AURPSTATE_Unconnected; AURPcleanup(state); /* purge all routes associated with the tunnel peer going-down */ AURPpurgeri(state->rem_node); /* respond to the going-down peer with an RI Ack packet */ AURPsndRIAck(state, m, 0); } |