bsd/netat/at_pcb.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27  *      Copyright (c) 1997-1999 Apple Computer, Inc.
  28  *      All Rights Reserved.
  29  */
  30 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1982, 1986, 1991, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)at_pcb.c    8.2 (Berkeley) 1/4/94
  64  */
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/malloc.h>
  69 #include <sys/mbuf.h>
  70 #include <sys/protosw.h>
  71 #include <sys/socket.h>
  72 #include <sys/socketvar.h>
  73 #include <sys/ioctl.h>
  74 #include <sys/errno.h>
  75 #include <sys/time.h>
  76 #include <sys/proc.h>
  77 #include <kern/kern_types.h>
  78 #include <kern/zalloc.h>
  79 #include <kern/queue.h>
  80
  81 #include <net/if.h>
  82
  83 #include <netat/sysglue.h>
  84 #include <netat/appletalk.h>
  85 #include <netat/ddp.h>
  86 #include <netat/at_pcb.h>
  87 #include <netat/debug.h>
  88 #include <netat/at_var.h>
  89 #include <netat/adsp.h>
  90 #include <netat/adsp_internal.h>
  91
  92 extern struct atpcb ddp_head;
  93 extern struct atpcb *atp_inputQ[];
  94 extern CCB *adsp_inputQ[];
  95 extern at_ifaddr_t *ifID_home;
  96 extern struct {
  97   void (*func)();
  98   } ddp_handler[];
  99
 100 int DDP_chksum_on = FALSE;
 101 int DDP_slfsnd_on = FALSE;
 102
 103 zone_t atpcb_zone;
 104
 105 void at_memzone_init()
 106 {
 107         vm_size_t str_size;
 108
 109         str_size = (vm_size_t)sizeof(struct atpcb);
 110         atpcb_zone = (zone_t)zinit(str_size, 1000*str_size, 8192, "atpcb zone");
 111 }
 112
 113 int at_pcballoc(so, head)
 114         struct socket *so;
 115         struct atpcb *head;
 116 {
 117         register struct atpcb *pcb;
 118
 119         pcb = (struct atpcb *)zalloc(atpcb_zone);
 120         if (pcb == NULL)
 121                 return (ENOBUFS);
 122         bzero((caddr_t)pcb, sizeof(*pcb));
 123
 124         /* set the flags to the system defaults */
 125         if (DDP_chksum_on)
 126                 pcb->ddp_flags |= DDPFLG_CHKSUM;
 127         else
 128                 pcb->ddp_flags &= ~DDPFLG_CHKSUM;
 129         if (DDP_slfsnd_on)
 130                 pcb->ddp_flags |= DDPFLG_SLFSND;
 131         else
 132                 pcb->ddp_flags &= ~DDPFLG_SLFSND;
 133
 134         pcb->atpcb_head = head;
 135         pcb->atpcb_socket = so;
 136         if (head)
 137             insque((queue_t)pcb, (queue_t)head);
 138         so->so_pcb = (caddr_t)pcb;
 139
 140         return (0);
 141 }
 142
 143 int at_pcbdetach(pcb)
 144         struct atpcb *pcb;
 145 {
 146         struct socket *so = pcb->atpcb_socket;
 147
 148         /* Notify NBP that we are closing this DDP socket */
 149         if (pcb->lport) {
 150                 ddp_notify_nbp(pcb->lport, pcb->pid, pcb->ddptype);
 151                 pcb->lport = 0;
 152         }
 153
 154         so->so_pcb = 0;
 155         if ((pcb->atpcb_next) && (pcb->atpcb_prev))
 156             remque((queue_t)pcb);
 157         zfree(atpcb_zone, (vm_offset_t)pcb);
 158         sofree(so);
 159         return(0);
 160 }
 161
 162 int ddp_socket_inuse(ddpsock, proto)
 163           u_char ddpsock, proto;
 164 {
 165           struct atpcb *pcb;
 166
 167           if ((!proto || (proto == DDP_ATP)) && atp_inputQ[ddpsock])
 168                 return TRUE;
 169           if ((!proto || (proto == DDP_ADSP)) && adsp_inputQ[ddpsock])
 170                 return TRUE;
 171           if (ddp_handler[ddpsock].func)
 172                 return TRUE;
 173           for (pcb = ddp_head.atpcb_next; pcb != &ddp_head;
 174                pcb = pcb->atpcb_next) {
 175                 if (pcb->lport == ddpsock &&
 176                     (!pcb->ddptype || !proto || (pcb->ddptype == proto)))
 177                         return TRUE;
 178           }
 179           return FALSE;
 180 }
 181
 182 int at_pcbbind(pcb, nam)
 183         register struct atpcb *pcb;
 184         struct sockaddr *nam;
 185 {
 186         register struct socket *so = pcb->atpcb_socket;
 187         register struct sockaddr_at *local = (struct sockaddr_at *) nam;
 188         u_char ddpsock = local->sat_port;
 189
 190         if ((!ifID_home) || (local->sat_family != AF_APPLETALK))
 191                 return(EADDRNOTAVAIL);
 192
 193         if (pcb->lport != ATADDR_ANYPORT ||
 194             pcb->laddr.s_node != ATADDR_ANYNODE ||
 195             pcb->laddr.s_net != ATADDR_ANYNET)
 196                 return(EINVAL);
 197
 198         /* Request for dynamic socket? */
 199         if (ddpsock == 0) {
 200                 /* Search table for free one */
 201                 /* *** borrow IP algorithm, instead? *** */
 202                 for (ddpsock = DDP_SOCKET_LAST;
 203                      ddpsock >= (DDP_SOCKET_1st_DYNAMIC + 1);
 204                                                 /* sip has 1st */
 205                      ddpsock--) {
 206                         if (! ddp_socket_inuse(ddpsock, pcb->ddptype))
 207                                 break;
 208                 }
 209                 if (ddpsock < (DDP_SOCKET_1st_DYNAMIC + 1))
 210                         return(EADDRNOTAVAIL);  /* Error if no free sockets */
 211         } else {
 212                 /* Asking to open a socket by its number.
 213                    Check if its legal & free. */
 214                 if (ddpsock > DDP_SOCKET_LAST)
 215                         return(EINVAL);
 216                 if (ddp_socket_inuse(ddpsock, pcb->ddptype))
 217                         return(EADDRNOTAVAIL);
 218         }
 219
 220         pcb->lport = ddpsock;
 221         /* if address is specified, make sure address matches one of the
 222            interfaces configured for AppleTalk */
 223         if (local->sat_addr.s_net || local->sat_addr.s_node) {
 224             if (MULTIHOME_MODE) {
 225                 at_ifaddr_t *ifID;
 226                 TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
 227                         if (ifID->ifThisNode.s_net == local->sat_addr.s_net &&
 228                             ifID->ifThisNode.s_node == local->sat_addr.s_node) {
 229                                 pcb->laddr = local->sat_addr;
 230                                 return(0);
 231                         }
 232                 }
 233                 return(EINVAL);
 234             } else {
 235               /* for single-port and router modes if the local address is
 236                  specified, it must match the default interface, which is
 237                  what will be put into packets' source address anyway */
 238                 if (ifID_home->ifThisNode.s_net == local->sat_addr.s_net &&
 239                     ifID_home->ifThisNode.s_node == local->sat_addr.s_node) {
 240                         pcb->laddr = local->sat_addr;
 241                         return(0);
 242                 }
 243                 return(EINVAL);
 244
 245             }
 246         }
 247         return(0);
 248 }