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 #include <net/netisr2.h>
  42
  43 /*
  44  * Routines to manage the raw protocol control blocks.
  45  *
  46  * All of them must run in netisr0.
  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 rawcb_list_head rawcb_list;
  55
  56 static u_long   raw_sendspace = RAWSNDQ;
  57 static u_long   raw_recvspace = RAWRCVQ;
  58
  59 /*
  60  * Allocate a control block and a nominal amount
  61  * of buffer space for the socket.
  62  *
  63  * The so->so_pcb has already been assigned by the caller, and the
  64  * caller has also already bumped the socket refs.
  65  */
  66 int
  67 raw_attach(struct socket *so, int proto, struct rlimit *rl)
  68 {
  69         struct rawcb *rp = sotorawcb(so);
  70         int error;
  71
  72         ASSERT_NETISR0;
  73
  74         /*
  75          * It is assumed that raw_attach is called
  76          * after space has been allocated for the
  77          * rawcb.
  78          */
  79         if (rp == NULL)
  80                 return (ENOBUFS);
  81         error = soreserve(so, raw_sendspace, raw_recvspace, rl);
  82         if (error)
  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
  88         LIST_INSERT_HEAD(&rawcb_list, rp, list);
  89
  90         return (0);
  91 }
  92
  93 /*
  94  * Detach the raw connection block and discard
  95  * socket resources.
  96  */
  97 void
  98 raw_detach(struct rawcb *rp)
  99 {
 100         struct socket *so = rp->rcb_socket;
 101
 102         ASSERT_NETISR0;
 103
 104         LIST_REMOVE(rp, list);
 105
 106         so->so_pcb = NULL;
 107         sofree(so);             /* remove pcb ref */
 108         kfree(rp, M_PCB);
 109 }
 110
 111 /*
 112  * Disconnect and possibly release resources.
 113  */
 114 void
 115 raw_disconnect(struct rawcb *rp)
 116 {
 117         ASSERT_NETISR0;
 118
 119         if (rp->rcb_socket->so_state & SS_NOFDREF)
 120                 raw_detach(rp);
 121 }
 122
 123 #ifdef notdef
 124 #include <sys/mbuf.h>
 125
 126 int
 127 raw_bind(struct socket *so, struct mbuf *nam)
 128 {
 129         struct sockaddr *addr = mtod(nam, struct sockaddr *);
 130         struct rawcb *rp;
 131
 132         ASSERT_NETISR0;
 133
 134         if (ifnet == NULL)
 135                 return (EADDRNOTAVAIL);
 136         rp = sotorawcb(so);
 137         nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
 138         rp->rcb_laddr = mtod(nam, struct sockaddr *);
 139         return (0);
 140 }
 141 #endif