bsd/net/raw_cb.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  * Copyright (c) 1980, 1986, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
  58  */
  59
  60 #include <sys/param.h>
  61 #include <sys/malloc.h>
  62 #include <sys/socket.h>
  63 #include <sys/socketvar.h>
  64 #include <sys/domain.h>
  65 #include <sys/protosw.h>
  66
  67 #include <net/raw_cb.h>
  68
  69 /*
  70  * Routines to manage the raw protocol control blocks.
  71  *
  72  * TODO:
  73  *      hash lookups by protocol family/protocol + address family
  74  *      take care of unique address problems per AF?
  75  *      redo address binding to allow wildcards
  76  */
  77
  78 struct rawcb_list_head rawcb_list;
  79
  80 static u_long   raw_sendspace = RAWSNDQ;
  81 static u_long   raw_recvspace = RAWRCVQ;
  82
  83 /*
  84  * Allocate a control block and a nominal amount
  85  * of buffer space for the socket.
  86  */
  87 int
  88 raw_attach(so, proto)
  89         register struct socket *so;
  90         int proto;
  91 {
  92         register struct rawcb *rp = sotorawcb(so);
  93         int error;
  94
  95         /*
  96          * It is assumed that raw_attach is called
  97          * after space has been allocated for the
  98          * rawcb.
  99          */
 100         if (rp == 0)
 101                 return (ENOBUFS);
 102         error = soreserve(so, raw_sendspace, raw_recvspace);
 103         if (error)
 104                 return (error);
 105         rp->rcb_socket = so;
 106         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
 107         rp->rcb_proto.sp_protocol = proto;
 108         LIST_INSERT_HEAD(&rawcb_list, rp, list);
 109         return (0);
 110 }
 111
 112 /*
 113  * Detach the raw connection block and discard
 114  * socket resources.
 115  */
 116 void
 117 raw_detach(rp)
 118         register struct rawcb *rp;
 119 {
 120         struct socket *so = rp->rcb_socket;
 121
 122         so->so_pcb = 0;
 123         sofree(so);
 124         LIST_REMOVE(rp, list);
 125 #ifdef notdef
 126         if (rp->rcb_laddr)
 127                 m_freem(dtom(rp->rcb_laddr));
 128         rp->rcb_laddr = 0;
 129 #endif
 130         FREE((caddr_t)(rp), M_PCB);
 131 }
 132
 133 /*
 134  * Disconnect and possibly release resources.
 135  */
 136 void
 137 raw_disconnect(rp)
 138         struct rawcb *rp;
 139 {
 140
 141 #ifdef notdef
 142         if (rp->rcb_faddr)
 143                 m_freem(dtom(rp->rcb_faddr));
 144         rp->rcb_faddr = 0;
 145 #endif
 146         if (rp->rcb_socket->so_state & SS_NOFDREF)
 147                 raw_detach(rp);
 148 }
 149
 150 #ifdef notdef
 151 #include <sys/mbuf.h>
 152
 153 int
 154 raw_bind(so, nam)
 155         register struct socket *so;
 156         struct mbuf *nam;
 157 {
 158         struct sockaddr *addr = mtod(nam, struct sockaddr *);
 159         register struct rawcb *rp;
 160
 161         if (ifnet == 0)
 162                 return (EADDRNOTAVAIL);
 163         rp = sotorawcb(so);
 164         nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
 165         rp->rcb_laddr = mtod(nam, struct sockaddr *);
 166         return (0);
 167 }
 168 #endif