sys/net/raw_cb.c

   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: src/sys/net/raw_cb.c,v 1.16 1999/08/28 00:48:27 peter Exp $
  35  * $DragonFly: src/sys/net/raw_cb.c,v 1.11 2006/09/05 00:55:46 dillon Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/malloc.h>
  40 #include <sys/socket.h>
  41 #include <sys/socketvar.h>
  42 #include <sys/domain.h>
  43 #include <sys/protosw.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(struct socket *so, int proto, struct rlimit *rl)
  67 {
  68         struct rawcb *rp = sotorawcb(so);
  69         int error;
  70
  71         /*
  72          * It is assumed that raw_attach is called
  73          * after space has been allocated for the
  74          * rawcb.
  75          */
  76         if (rp == NULL)
  77                 return (ENOBUFS);
  78         error = soreserve(so, raw_sendspace, raw_recvspace, rl);
  79         if (error)
  80                 return (error);
  81         rp->rcb_socket = so;
  82         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
  83         rp->rcb_proto.sp_protocol = proto;
  84         LIST_INSERT_HEAD(&rawcb_list, rp, list);
  85         return (0);
  86 }
  87
  88 /*
  89  * Detach the raw connection block and discard
  90  * socket resources.
  91  */
  92 void
  93 raw_detach(struct rawcb *rp)
  94 {
  95         struct socket *so = rp->rcb_socket;
  96
  97         so->so_pcb = NULL;
  98         sofree(so);
  99         LIST_REMOVE(rp, list);
 100         kfree(rp, M_PCB);
 101 }
 102
 103 /*
 104  * Disconnect and possibly release resources.
 105  */
 106 void
 107 raw_disconnect(struct rawcb *rp)
 108 {
 109         if (rp->rcb_socket->so_state & SS_NOFDREF)
 110                 raw_detach(rp);
 111 }
 112
 113 #ifdef notdef
 114 #include <sys/mbuf.h>
 115
 116 int
 117 raw_bind(struct socket *so, struct mbuf *nam)
 118 {
 119         struct sockaddr *addr = mtod(nam, struct sockaddr *);
 120         struct rawcb *rp;
 121
 122         if (ifnet == NULL)
 123                 return (EADDRNOTAVAIL);
 124         rp = sotorawcb(so);
 125         nam = m_copym(nam, 0, M_COPYALL, MB_TRYWAIT);
 126         rp->rcb_laddr = mtod(nam, struct sockaddr *);
 127         return (0);
 128 }
 129 #endif