bsd/netiso/idrp_usrreq.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1992, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)idrp_usrreq.c       8.1 (Berkeley) 6/10/93
  55  */
  56
  57 #include <sys/param.h>
  58 #include <sys/proc.h>
  59 #include <sys/systm.h>
  60 #include <sys/malloc.h>
  61 #include <sys/mbuf.h>
  62 #include <sys/socket.h>
  63 #include <sys/socketvar.h>
  64 #include <sys/protosw.h>
  65 #include <sys/errno.h>
  66
  67 #include <net/route.h>
  68 #include <net/if.h>
  69
  70 #include <netiso/argo_debug.h>
  71 #include <netiso/iso.h>
  72 #include <netiso/clnp.h>
  73 #include <netiso/clnl.h>
  74 #include <netiso/iso_pcb.h>
  75 #include <netiso/iso_var.h>
  76
  77 int idrp_input();
  78 struct  isopcb  idrp_isop;
  79 static  struct  sockaddr_iso idrp_addrs[2] =
  80 {  { sizeof(idrp_addrs), AF_ISO, }, { sizeof(idrp_addrs[1]), AF_ISO, } };
  81 /*
  82  * IDRP initialization
  83  */
  84 idrp_init()
  85 {
  86         extern struct clnl_protosw clnl_protox[256];
  87
  88         idrp_isop.isop_next = idrp_isop.isop_prev = &idrp_isop;
  89         idrp_isop.isop_faddr = &idrp_isop.isop_sfaddr;
  90         idrp_isop.isop_laddr = &idrp_isop.isop_sladdr;
  91         idrp_isop.isop_sladdr = idrp_addrs[1];
  92         idrp_isop.isop_sfaddr = idrp_addrs[1];
  93         clnl_protox[ISO10747_IDRP].clnl_input = idrp_input;
  94 }
  95
  96 /*
  97  * CALLED FROM:
  98  *      tpclnp_input().
  99  * FUNCTION and ARGUMENTS:
 100  * Take a packet (m) from clnp, strip off the clnp header
 101  * and mke suitable for the idrp socket.
 102  * No return value.
 103  */
 104 idrp_input(m, src, dst)
 105         register struct mbuf *m;
 106         struct sockaddr_iso *src, *dst;
 107 {
 108         if (idrp_isop.isop_socket == 0) {
 109         bad:    m_freem(m);
 110                 return 0;
 111         }
 112         bzero(idrp_addrs[0].siso_data, sizeof(idrp_addrs[0].siso_data));
 113         bcopy((caddr_t)&(src->siso_addr), (caddr_t)&idrp_addrs[0].siso_addr,
 114                 1 + src->siso_nlen);
 115         bzero(idrp_addrs[1].siso_data, sizeof(idrp_addrs[1].siso_data));
 116         bcopy((caddr_t)&(dst->siso_addr), (caddr_t)&idrp_addrs[1].siso_addr,
 117                 1 + dst->siso_nlen);
 118         if (sbappendaddr(&idrp_isop.isop_socket->so_rcv,
 119                 (struct sockaddr *)idrp_addrs, m, (struct mbuf *)0) == 0)
 120                 goto bad;
 121         sorwakeup(idrp_isop.isop_socket);
 122         return 0;
 123 }
 124
 125 idrp_output(m, addr)
 126         struct mbuf *m, *addr;
 127 {
 128         register struct sockaddr_iso *siso = mtod(addr, struct sockaddr_iso *);
 129         int s = splnet(), i;
 130
 131         bcopy((caddr_t)&(siso->siso_addr),
 132               (caddr_t)&idrp_isop.isop_sfaddr.siso_addr, 1 + siso->siso_nlen);
 133         siso++;
 134         bcopy((caddr_t)&(siso->siso_addr),
 135               (caddr_t)&idrp_isop.isop_sladdr.siso_addr, 1 + siso->siso_nlen);
 136         i = clnp_output(m, idrp_isop, m->m_pkthdr.len, 0);
 137         splx(s);
 138         return (i);
 139 }
 140
 141 u_long  idrp_sendspace = 3072;          /* really max datagram size */
 142 u_long  idrp_recvspace = 40 * 1024;     /* 40 1K datagrams */
 143
 144 /*ARGSUSED*/
 145 idrp_usrreq(so, req, m, addr, control)
 146         struct socket *so;
 147         int req;
 148         struct mbuf *m, *addr, *control;
 149 {
 150         int error = 0;
 151
 152          /* Note: need to block idrp_input while changing
 153          * the udp pcb queue and/or pcb addresses.
 154          */
 155         switch (req) {
 156
 157         case PRU_ATTACH:
 158                 if (idrp_isop.isop_socket != NULL) {
 159                         error = ENXIO;
 160                         break;
 161                 }
 162                 idrp_isop.isop_socket = so;
 163                 error = soreserve(so, idrp_sendspace, idrp_recvspace);
 164                 break;
 165
 166         case PRU_SHUTDOWN:
 167                 socantsendmore(so);
 168                 break;
 169
 170         case PRU_SEND:
 171                 return (idrp_output(m, addr));
 172
 173         case PRU_ABORT:
 174                 soisdisconnected(so);
 175         case PRU_DETACH:
 176                 idrp_isop.isop_socket = 0;
 177                 break;
 178
 179
 180         case PRU_SENSE:
 181                 /*
 182                  * stat: don't bother with a blocksize.
 183                  */
 184                 return (0);
 185
 186         default:
 187                 return (EOPNOTSUPP);    /* do not free mbuf's */
 188         }
 189
 190 release:
 191         if (control) {
 192                 printf("idrp control data unexpectedly retained\n");
 193                 m_freem(control);
 194         }
 195         if (m)
 196                 m_freem(m);
 197         return (error);
 198 }