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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  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
   30  * $FreeBSD: src/sys/net/raw_cb.c,v 1.29.4.1 2004/10/21 09:30:46 rwatson Exp $
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/domain.h>
   35 #include <sys/lock.h>
   36 #include <sys/malloc.h>
   37 #include <sys/mutex.h>
   38 #include <sys/protosw.h>
   39 #include <sys/socket.h>
   40 #include <sys/socketvar.h>
   41 #include <sys/systm.h>
   42 
   43 #include <net/raw_cb.h>
   44 
   45 /*
   46  * Routines to manage the raw protocol control blocks.
   47  *
   48  * TODO:
   49  *      hash lookups by protocol family/protocol + address family
   50  *      take care of unique address problems per AF?
   51  *      redo address binding to allow wildcards
   52  */
   53 
   54 struct mtx rawcb_mtx;
   55 struct rawcb_list_head rawcb_list;
   56 
   57 const static u_long     raw_sendspace = RAWSNDQ;
   58 const static u_long     raw_recvspace = RAWRCVQ;
   59 
   60 /*
   61  * Allocate a control block and a nominal amount
   62  * of buffer space for the socket.
   63  */
   64 int
   65 raw_attach(so, proto)
   66         register struct socket *so;
   67         int proto;
   68 {
   69         register struct rawcb *rp = sotorawcb(so);
   70         int error;
   71 
   72         /*
   73          * It is assumed that raw_attach is called
   74          * after space has been allocated for the
   75          * rawcb.
   76          */
   77         if (rp == 0)
   78                 return (ENOBUFS);
   79         error = soreserve(so, raw_sendspace, raw_recvspace);
   80         if (error)
   81                 return (error);
   82         rp->rcb_socket = so;
   83         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
   84         rp->rcb_proto.sp_protocol = proto;
   85         mtx_lock(&rawcb_mtx);
   86         LIST_INSERT_HEAD(&rawcb_list, rp, list);
   87         mtx_unlock(&rawcb_mtx);
   88         return (0);
   89 }
   90 
   91 /*
   92  * Detach the raw connection block and discard
   93  * socket resources.
   94  */
   95 void
   96 raw_detach(rp)
   97         register struct rawcb *rp;
   98 {
   99         struct socket *so = rp->rcb_socket;
  100 
  101         ACCEPT_LOCK();
  102         SOCK_LOCK(so);
  103         so->so_pcb = 0;
  104         sotryfree(so);
  105         LIST_REMOVE(rp, list);
  106 #ifdef notdef
  107         if (rp->rcb_laddr)
  108                 m_freem(dtom(rp->rcb_laddr));
  109         rp->rcb_laddr = 0;
  110 #endif
  111         free((caddr_t)(rp), M_PCB);
  112 }
  113 
  114 /*
  115  * Disconnect and possibly release resources.
  116  */
  117 void
  118 raw_disconnect(rp)
  119         struct rawcb *rp;
  120 {
  121 
  122 #ifdef notdef
  123         if (rp->rcb_faddr)
  124                 m_freem(dtom(rp->rcb_faddr));
  125         rp->rcb_faddr = 0;
  126 #endif
  127         if (rp->rcb_socket->so_state & SS_NOFDREF)
  128                 raw_detach(rp);
  129 }
  130 
  131 #ifdef notdef
  132 #include <sys/mbuf.h>
  133 
  134 int
  135 raw_bind(so, nam)
  136         register struct socket *so;
  137         struct mbuf *nam;
  138 {
  139         struct sockaddr *addr = mtod(nam, struct sockaddr *);
  140         register struct rawcb *rp;
  141 
  142         if (ifnet == 0)
  143                 return (EADDRNOTAVAIL);
  144         rp = sotorawcb(so);
  145         nam = m_copym(nam, 0, M_COPYALL, M_TRYWAIT);
  146         rp->rcb_laddr = mtod(nam, struct sockaddr *);
  147         return (0);
  148 }
  149 #endif

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