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 /*      $NetBSD: raw_cb.c,v 1.20 2008/08/04 06:19:35 matt Exp $ */
    2 
    3 /*
    4  * Copyright (c) 1980, 1986, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)raw_cb.c    8.1 (Berkeley) 6/10/93
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __KERNEL_RCSID(0, "$NetBSD: raw_cb.c,v 1.20 2008/08/04 06:19:35 matt Exp $");
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/mbuf.h>
   40 #include <sys/socket.h>
   41 #include <sys/socketvar.h>
   42 #include <sys/domain.h>
   43 #include <sys/protosw.h>
   44 #include <sys/errno.h>
   45 
   46 #include <net/if.h>
   47 #include <net/route.h>
   48 #include <net/raw_cb.h>
   49 #include <netinet/in.h>
   50 
   51 /*
   52  * Routines to manage the raw protocol control blocks.
   53  *
   54  * TODO:
   55  *      hash lookups by protocol family/protocol + address family
   56  *      take care of unique address problems per AF?
   57  *      redo address binding to allow wildcards
   58  */
   59 
   60 struct  rawcbhead rawcb = LIST_HEAD_INITIALIZER(rawcb);
   61 
   62 u_long  raw_sendspace = RAWSNDQ;
   63 u_long  raw_recvspace = RAWRCVQ;
   64 
   65 /*
   66  * Allocate a control block and a nominal amount
   67  * of buffer space for the socket.
   68  */
   69 int
   70 raw_attach(struct socket *so, int proto)
   71 {
   72         struct rawcb *rp = sotorawcb(so);
   73         int error;
   74 
   75         /*
   76          * It is assumed that raw_attach is called
   77          * after space has been allocated for the
   78          * rawcb.
   79          */
   80         if (rp == 0)
   81                 return (ENOBUFS);
   82         if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
   83                 return (error);
   84         rp->rcb_socket = so;
   85         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
   86         rp->rcb_proto.sp_protocol = proto;
   87         LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
   88         return (0);
   89 }
   90 
   91 /*
   92  * Detach the raw connection block and discard
   93  * socket resources.
   94  */
   95 void
   96 raw_detach(struct rawcb *rp)
   97 {
   98         struct socket *so = rp->rcb_socket;
   99 
  100         so->so_pcb = NULL;
  101         KASSERT(so->so_lock == softnet_lock);   /* XXX */
  102         LIST_REMOVE(rp, rcb_list);              /* remove last reference */
  103         /* sofree drops the socket's lock. */
  104         sofree(so);
  105 #ifdef notdef
  106         if (rp->rcb_laddr)
  107                 m_freem(dtom(rp->rcb_laddr));
  108         rp->rcb_laddr = 0;
  109 #endif
  110         free((void *)rp, M_PCB);
  111         mutex_enter(softnet_lock);
  112 }
  113 
  114 /*
  115  * Disconnect and possibly release resources.
  116  */
  117 void
  118 raw_disconnect(struct rawcb *rp)
  119 {
  120 
  121 #ifdef notdef
  122         if (rp->rcb_faddr)
  123                 m_freem(dtom(rp->rcb_faddr));
  124         rp->rcb_faddr = 0;
  125 #endif
  126         if (rp->rcb_socket->so_state & SS_NOFDREF)
  127                 raw_detach(rp);
  128 }

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