bsd/net/raw_cb.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1980, 1986, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/malloc.h>
  67 #include <sys/socket.h>
  68 #include <sys/socketvar.h>
  69 #include <sys/domain.h>
  70 #include <sys/protosw.h>
  71 #include <kern/locks.h>
  72
  73 #include <net/raw_cb.h>
  74
  75 /*
  76  * Routines to manage the raw protocol control blocks.
  77  *
  78  * TODO:
  79  *      hash lookups by protocol family/protocol + address family
  80  *      take care of unique address problems per AF?
  81  *      redo address binding to allow wildcards
  82  */
  83
  84 struct rawcb_list_head rawcb_list;
  85
  86 static u_long   raw_sendspace = RAWSNDQ;
  87 static u_long   raw_recvspace = RAWRCVQ;
  88 extern lck_mtx_t        *raw_mtx;       /*### global raw cb mutex for now */
  89
  90 /*
  91  * Allocate a control block and a nominal amount
  92  * of buffer space for the socket.
  93  */
  94 int
  95 raw_attach(so, proto)
  96         register struct socket *so;
  97         int proto;
  98 {
  99         register struct rawcb *rp = sotorawcb(so);
 100         int error;
 101
 102         /*
 103          * It is assumed that raw_attach is called
 104          * after space has been allocated for the
 105          * rawcb.
 106          */
 107         if (rp == 0)
 108                 return (ENOBUFS);
 109         error = soreserve(so, raw_sendspace, raw_recvspace);
 110         if (error)
 111                 return (error);
 112         rp->rcb_socket = so;
 113         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
 114         rp->rcb_proto.sp_protocol = proto;
 115         lck_mtx_lock(raw_mtx);
 116         LIST_INSERT_HEAD(&rawcb_list, rp, list);
 117         lck_mtx_unlock(raw_mtx);
 118         return (0);
 119 }
 120
 121 /*
 122  * Detach the raw connection block and discard
 123  * socket resources.
 124  */
 125 void
 126 raw_detach(rp)
 127         register struct rawcb *rp;
 128 {
 129         struct socket *so = rp->rcb_socket;
 130
 131         so->so_pcb = 0;
 132         so->so_flags |= SOF_PCBCLEARING;
 133         sofree(so);
 134         if (!lck_mtx_try_lock(raw_mtx)) {
 135                 socket_unlock(so, 0);
 136                 lck_mtx_lock(raw_mtx);
 137                 socket_lock(so, 0);
 138         }
 139         LIST_REMOVE(rp, list);
 140         lck_mtx_unlock(raw_mtx);
 141 #ifdef notdef
 142         if (rp->rcb_laddr)
 143                 m_freem(dtom(rp->rcb_laddr));
 144         rp->rcb_laddr = 0;
 145 #endif
 146         rp->rcb_socket = NULL;
 147         FREE((caddr_t)(rp), M_PCB);
 148 }
 149
 150 /*
 151  * Disconnect and possibly release resources.
 152  */
 153 void
 154 raw_disconnect(rp)
 155         struct rawcb *rp;
 156 {
 157
 158 #ifdef notdef
 159         if (rp->rcb_faddr)
 160                 m_freem(dtom(rp->rcb_faddr));
 161         rp->rcb_faddr = 0;
 162 #endif
 163         if (rp->rcb_socket->so_state & SS_NOFDREF)
 164                 raw_detach(rp);
 165 }
 166
 167 #ifdef notdef
 168 #include <sys/mbuf.h>
 169
 170 int
 171 raw_bind(so, nam)
 172         register struct socket *so;
 173         struct mbuf *nam;
 174 {
 175         struct sockaddr *addr = mtod(nam, struct sockaddr *);
 176         register struct rawcb *rp;
 177
 178         if (ifnet == 0)
 179                 return (EADDRNOTAVAIL);
 180         rp = sotorawcb(so);
 181         nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
 182         rp->rcb_laddr = mtod(nam, struct sockaddr *);
 183         return (0);
 184 }
 185 #endif