| 1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)clnp_timer.c 7.5 (Berkeley) 5/6/91 |
| 34 | */ |
| 35 | |
| 36 | /*********************************************************** |
| 37 | Copyright IBM Corporation 1987 |
| 38 | |
| 39 | All Rights Reserved |
| 40 | |
| 41 | Permission to use, copy, modify, and distribute this software and its |
| 42 | documentation for any purpose and without fee is hereby granted, |
| 43 | provided that the above copyright notice appear in all copies and that |
| 44 | both that copyright notice and this permission notice appear in |
| 45 | supporting documentation, and that the name of IBM not be |
| 46 | used in advertising or publicity pertaining to distribution of the |
| 47 | software without specific, written prior permission. |
| 48 | |
| 49 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| 50 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| 51 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| 52 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| 53 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| 54 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| 55 | SOFTWARE. |
| 56 | |
| 57 | ******************************************************************/ |
| 58 | |
| 59 | /* |
| 60 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison |
| 61 | */ |
| 62 | /* $Header: clnp_timer.c,v 4.2 88/06/29 14:59:05 hagens Exp $ */ |
| 63 | /* $Source: /usr/argo/sys/netiso/RCS/clnp_timer.c,v $ */ |
| 64 | |
| 65 | #include "param.h" |
| 66 | #include "mbuf.h" |
| 67 | #include "domain.h" |
| 68 | #include "protosw.h" |
| 69 | #include "socket.h" |
| 70 | #include "socketvar.h" |
| 71 | #include "errno.h" |
| 72 | |
| 73 | #include "../net/if.h" |
| 74 | #include "../net/route.h" |
| 75 | |
| 76 | #include "iso.h" |
| 77 | #include "clnp.h" |
| 78 | #include "clnp_stat.h" |
| 79 | #include "argo_debug.h" |
| 80 | |
| 81 | extern struct clnp_fragl *clnp_frags; |
| 82 | |
| 83 | /* |
| 84 | * FUNCTION: clnp_freefrags |
| 85 | * |
| 86 | * PURPOSE: Free the resources associated with a fragment |
| 87 | * |
| 88 | * RETURNS: pointer to next fragment in list of fragments |
| 89 | * |
| 90 | * SIDE EFFECTS: |
| 91 | * |
| 92 | * NOTES: |
| 93 | * TODO: send ER back to source |
| 94 | */ |
| 95 | struct clnp_fragl * |
| 96 | clnp_freefrags(cfh) |
| 97 | register struct clnp_fragl *cfh; /* fragment header to delete */ |
| 98 | { |
| 99 | struct clnp_fragl *next = cfh->cfl_next; |
| 100 | struct clnp_frag *cf; |
| 101 | |
| 102 | /* free any frags hanging around */ |
| 103 | cf = cfh->cfl_frags; |
| 104 | while (cf != NULL) { |
| 105 | struct clnp_frag *cf_next = cf->cfr_next; |
| 106 | INCSTAT(cns_fragdropped); |
| 107 | m_freem(cf->cfr_data); |
| 108 | cf = cf_next; |
| 109 | } |
| 110 | |
| 111 | /* free the copy of the header */ |
| 112 | INCSTAT(cns_fragdropped); |
| 113 | m_freem(cfh->cfl_orighdr); |
| 114 | |
| 115 | if (clnp_frags == cfh) { |
| 116 | clnp_frags = cfh->cfl_next; |
| 117 | } else { |
| 118 | struct clnp_fragl *scan; |
| 119 | |
| 120 | for (scan = clnp_frags; scan != NULL; scan = scan->cfl_next) { |
| 121 | if (scan->cfl_next == cfh) { |
| 122 | scan->cfl_next = cfh->cfl_next; |
| 123 | break; |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /* free the fragment header */ |
| 129 | m_freem(dtom(cfh)); |
| 130 | |
| 131 | return(next); |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * FUNCTION: clnp_slowtimo |
| 136 | * |
| 137 | * PURPOSE: clnp timer processing; if the ttl expires on a |
| 138 | * packet on the reassembly queue, discard it. |
| 139 | * |
| 140 | * RETURNS: none |
| 141 | * |
| 142 | * SIDE EFFECTS: |
| 143 | * |
| 144 | * NOTES: |
| 145 | */ |
| 146 | clnp_slowtimo() |
| 147 | { |
| 148 | register struct clnp_fragl *cfh = clnp_frags; |
| 149 | int s = splnet(); |
| 150 | |
| 151 | while (cfh != NULL) { |
| 152 | if (--cfh->cfl_ttl == 0) { |
| 153 | cfh = clnp_freefrags(cfh); |
| 154 | INCSTAT(cns_fragtimeout); |
| 155 | } else { |
| 156 | cfh = cfh->cfl_next; |
| 157 | } |
| 158 | } |
| 159 | splx(s); |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * FUNCTION: clnp_drain |
| 164 | * |
| 165 | * PURPOSE: drain off all datagram fragments |
| 166 | * |
| 167 | * RETURNS: none |
| 168 | * |
| 169 | * SIDE EFFECTS: |
| 170 | * |
| 171 | * NOTES: |
| 172 | * TODO: should send back ER |
| 173 | */ |
| 174 | clnp_drain() |
| 175 | { |
| 176 | register struct clnp_fragl *cfh = clnp_frags; |
| 177 | |
| 178 | while (cfh != NULL) |
| 179 | cfh = clnp_freefrags(cfh); |
| 180 | } |