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. 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 1.16 1999/08/28 00:48:27 peter Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/malloc.h>
  35 #include <sys/socket.h>
  36 #include <sys/socketvar.h>
  37 #include <sys/domain.h>
  38 #include <sys/protosw.h>
  39
  40 #include <net/raw_cb.h>
  41
  42 /*
  43  * Routines to manage the raw protocol control blocks.
  44  *
  45  * TODO:
  46  *      hash lookups by protocol family/protocol + address family
  47  *      take care of unique address problems per AF?
  48  *      redo address binding to allow wildcards
  49  */
  50
  51 struct rawcb_list_head rawcb_list;
  52
  53 static u_long   raw_sendspace = RAWSNDQ;
  54 static u_long   raw_recvspace = RAWRCVQ;
  55
  56 /*
  57  * Allocate a control block and a nominal amount
  58  * of buffer space for the socket.
  59  *
  60  * The so->so_pcb has already been assigned by the caller, and the
  61  * caller has also already bumped the socket refs.
  62  */
  63 int
  64 raw_attach(struct socket *so, int proto, struct rlimit *rl)
  65 {
  66         struct rawcb *rp = sotorawcb(so);
  67         int error;
  68
  69         /*
  70          * It is assumed that raw_attach is called
  71          * after space has been allocated for the
  72          * rawcb.
  73          */
  74         if (rp == NULL)
  75                 return (ENOBUFS);
  76         error = soreserve(so, raw_sendspace, raw_recvspace, rl);
  77         if (error)
  78                 return (error);
  79         rp->rcb_socket = so;
  80         rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
  81         rp->rcb_proto.sp_protocol = proto;
  82         LIST_INSERT_HEAD(&rawcb_list, rp, list);
  83         return (0);
  84 }
  85
  86 /*
  87  * Detach the raw connection block and discard
  88  * socket resources.
  89  */
  90 void
  91 raw_detach(struct rawcb *rp)
  92 {
  93         struct socket *so = rp->rcb_socket;
  94
  95         so->so_pcb = NULL;
  96         sofree(so);             /* remove pcb ref */
  97         LIST_REMOVE(rp, list);
  98         kfree(rp, M_PCB);
  99 }
 100
 101 /*
 102  * Disconnect and possibly release resources.
 103  */
 104 void
 105 raw_disconnect(struct rawcb *rp)
 106 {
 107         if (rp->rcb_socket->so_state & SS_NOFDREF)
 108                 raw_detach(rp);
 109 }
 110
 111 #ifdef notdef
 112 #include <sys/mbuf.h>
 113
 114 int
 115 raw_bind(struct socket *so, struct mbuf *nam)
 116 {
 117         struct sockaddr *addr = mtod(nam, struct sockaddr *);
 118         struct rawcb *rp;
 119
 120         if (ifnet == NULL)
 121                 return (EADDRNOTAVAIL);
 122         rp = sotorawcb(so);
 123         nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
 124         rp->rcb_laddr = mtod(nam, struct sockaddr *);
 125         return (0);
 126 }
 127 #endif