The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net/raw_cb.c

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    1 /*
    2  * Copyright (c) 1980, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
   34  * $FreeBSD: releng/5.0/sys/net/raw_cb.c 107113 2002-11-20 19:00:54Z luigi $
   35  */
   36 
   37 #include <sys/param.h>
   38 #include <sys/domain.h>
   39 #include <sys/malloc.h>
   40 #include <sys/protosw.h>
   41 #include <sys/socket.h>
   42 #include <sys/socketvar.h>
   43 #include <sys/systm.h>
   44 
   45 #include <net/raw_cb.h>
   46 
   47 /*
   48  * Routines to manage the raw protocol control blocks.
   49  *
   50  * TODO:
   51  *      hash lookups by protocol family/protocol + address family
   52  *      take care of unique address problems per AF?
   53  *      redo address binding to allow wildcards
   54  */
   55 
   56 struct rawcb_list_head rawcb_list;
   57 
   58 static u_long   raw_sendspace = RAWSNDQ;
   59 static u_long   raw_recvspace = RAWRCVQ;
   60 
   61 /*
   62  * Allocate a control block and a nominal amount
   63  * of buffer space for the socket.
   64  */
   65 int
   66 raw_attach(so, proto)
   67         register struct socket *so;
   68         int proto;
   69 {
   70         register struct rawcb *rp = sotorawcb(so);
   71         int error;
   72 
   73         /*
   74          * It is assumed that raw_attach is called
   75          * after space has been allocated for the
   76          * rawcb.
   77          */
   78         if (rp == 0)
   79                 return (ENOBUFS);
   80         error = soreserve(so, raw_sendspace, raw_recvspace);
   81         if (error)
   82                 return (error);
   83         rp->rcb_socket = so;
   84         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
   85         rp->rcb_proto.sp_protocol = proto;
   86         LIST_INSERT_HEAD(&rawcb_list, rp, list);
   87         return (0);
   88 }
   89 
   90 /*
   91  * Detach the raw connection block and discard
   92  * socket resources.
   93  */
   94 void
   95 raw_detach(rp)
   96         register struct rawcb *rp;
   97 {
   98         struct socket *so = rp->rcb_socket;
   99 
  100         so->so_pcb = 0;
  101         sotryfree(so);
  102         LIST_REMOVE(rp, list);
  103 #ifdef notdef
  104         if (rp->rcb_laddr)
  105                 m_freem(dtom(rp->rcb_laddr));
  106         rp->rcb_laddr = 0;
  107 #endif
  108         free((caddr_t)(rp), M_PCB);
  109 }
  110 
  111 /*
  112  * Disconnect and possibly release resources.
  113  */
  114 void
  115 raw_disconnect(rp)
  116         struct rawcb *rp;
  117 {
  118 
  119 #ifdef notdef
  120         if (rp->rcb_faddr)
  121                 m_freem(dtom(rp->rcb_faddr));
  122         rp->rcb_faddr = 0;
  123 #endif
  124         if (rp->rcb_socket->so_state & SS_NOFDREF)
  125                 raw_detach(rp);
  126 }
  127 
  128 #ifdef notdef
  129 #include <sys/mbuf.h>
  130 
  131 int
  132 raw_bind(so, nam)
  133         register struct socket *so;
  134         struct mbuf *nam;
  135 {
  136         struct sockaddr *addr = mtod(nam, struct sockaddr *);
  137         register struct rawcb *rp;
  138 
  139         if (ifnet == 0)
  140                 return (EADDRNOTAVAIL);
  141         rp = sotorawcb(so);
  142         nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
  143         rp->rcb_laddr = mtod(nam, struct sockaddr *);
  144         return (0);
  145 }
  146 #endif

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