bsd/net/raw_cb.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) 1980, 1986, 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  *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
  55  */
  56
  57 #include <sys/param.h>
  58 #include <sys/malloc.h>
  59 #include <sys/socket.h>
  60 #include <sys/socketvar.h>
  61 #include <sys/domain.h>
  62 #include <sys/protosw.h>
  63 #include <kern/locks.h>
  64
  65 #include <net/raw_cb.h>
  66
  67 /*
  68  * Routines to manage the raw protocol control blocks.
  69  *
  70  * TODO:
  71  *      hash lookups by protocol family/protocol + address family
  72  *      take care of unique address problems per AF?
  73  *      redo address binding to allow wildcards
  74  */
  75
  76 struct rawcb_list_head rawcb_list;
  77
  78 static u_long   raw_sendspace = RAWSNDQ;
  79 static u_long   raw_recvspace = RAWRCVQ;
  80 extern lck_mtx_t        *raw_mtx;       /*### global raw cb mutex for now */
  81
  82 /*
  83  * Allocate a control block and a nominal amount
  84  * of buffer space for the socket.
  85  */
  86 int
  87 raw_attach(so, proto)
  88         register struct socket *so;
  89         int proto;
  90 {
  91         register struct rawcb *rp = sotorawcb(so);
  92         int error;
  93
  94         /*
  95          * It is assumed that raw_attach is called
  96          * after space has been allocated for the
  97          * rawcb.
  98          */
  99         if (rp == 0)
 100                 return (ENOBUFS);
 101         error = soreserve(so, raw_sendspace, raw_recvspace);
 102         if (error)
 103                 return (error);
 104         rp->rcb_socket = so;
 105         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
 106         rp->rcb_proto.sp_protocol = proto;
 107         lck_mtx_lock(raw_mtx);
 108         LIST_INSERT_HEAD(&rawcb_list, rp, list);
 109         lck_mtx_unlock(raw_mtx);
 110         return (0);
 111 }
 112
 113 /*
 114  * Detach the raw connection block and discard
 115  * socket resources.
 116  */
 117 void
 118 raw_detach(rp)
 119         register struct rawcb *rp;
 120 {
 121         struct socket *so = rp->rcb_socket;
 122
 123         so->so_pcb = 0;
 124         so->so_flags |= SOF_PCBCLEARING;
 125         sofree(so);
 126         if (!lck_mtx_try_lock(raw_mtx)) {
 127                 socket_unlock(so, 0);
 128                 lck_mtx_lock(raw_mtx);
 129                 socket_lock(so, 0);
 130         }
 131         LIST_REMOVE(rp, list);
 132         lck_mtx_unlock(raw_mtx);
 133 #ifdef notdef
 134         if (rp->rcb_laddr)
 135                 m_freem(dtom(rp->rcb_laddr));
 136         rp->rcb_laddr = 0;
 137 #endif
 138         rp->rcb_socket = NULL;
 139         FREE((caddr_t)(rp), M_PCB);
 140 }
 141
 142 /*
 143  * Disconnect and possibly release resources.
 144  */
 145 void
 146 raw_disconnect(rp)
 147         struct rawcb *rp;
 148 {
 149
 150 #ifdef notdef
 151         if (rp->rcb_faddr)
 152                 m_freem(dtom(rp->rcb_faddr));
 153         rp->rcb_faddr = 0;
 154 #endif
 155         if (rp->rcb_socket->so_state & SS_NOFDREF)
 156                 raw_detach(rp);
 157 }
 158
 159 #ifdef notdef
 160 #include <sys/mbuf.h>
 161
 162 int
 163 raw_bind(so, nam)
 164         register struct socket *so;
 165         struct mbuf *nam;
 166 {
 167         struct sockaddr *addr = mtod(nam, struct sockaddr *);
 168         register struct rawcb *rp;
 169
 170         if (ifnet == 0)
 171                 return (EADDRNOTAVAIL);
 172         rp = sotorawcb(so);
 173         nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
 174         rp->rcb_laddr = mtod(nam, struct sockaddr *);
 175         return (0);
 176 }
 177 #endif