bge: Avoid accessing invalid internal memory region on BCM5906
[dragonfly.git] / 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 * 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 $
efda3bd0 35 * $DragonFly: src/sys/net/raw_cb.c,v 1.11 2006/09/05 00:55:46 dillon Exp $
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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
56struct rawcb_list_head rawcb_list;
57
58static u_long raw_sendspace = RAWSNDQ;
59static u_long raw_recvspace = RAWRCVQ;
60
61/*
62 * Allocate a control block and a nominal amount
63 * of buffer space for the socket.
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64 *
65 * The so->so_pcb has already been assigned by the caller, and the
66 * caller has also already bumped the socket refs.
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67 */
68int
e4700d00 69raw_attach(struct socket *so, int proto, struct rlimit *rl)
984263bc 70{
82ed7fc2 71 struct rawcb *rp = sotorawcb(so);
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72 int error;
73
74 /*
75 * It is assumed that raw_attach is called
76 * after space has been allocated for the
77 * rawcb.
78 */
590b8cd4 79 if (rp == NULL)
984263bc 80 return (ENOBUFS);
e4700d00 81 error = soreserve(so, raw_sendspace, raw_recvspace, rl);
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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 LIST_INSERT_HEAD(&rawcb_list, rp, list);
88 return (0);
89}
90
91/*
92 * Detach the raw connection block and discard
93 * socket resources.
94 */
95void
8a3125c6 96raw_detach(struct rawcb *rp)
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97{
98 struct socket *so = rp->rcb_socket;
99
590b8cd4 100 so->so_pcb = NULL;
6cef7136 101 sofree(so); /* remove pcb ref */
984263bc 102 LIST_REMOVE(rp, list);
efda3bd0 103 kfree(rp, M_PCB);
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104}
105
106/*
107 * Disconnect and possibly release resources.
108 */
109void
8a3125c6 110raw_disconnect(struct rawcb *rp)
984263bc 111{
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112 if (rp->rcb_socket->so_state & SS_NOFDREF)
113 raw_detach(rp);
114}
115
116#ifdef notdef
117#include <sys/mbuf.h>
118
119int
8a3125c6 120raw_bind(struct socket *so, struct mbuf *nam)
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121{
122 struct sockaddr *addr = mtod(nam, struct sockaddr *);
82ed7fc2 123 struct rawcb *rp;
984263bc 124
590b8cd4 125 if (ifnet == NULL)
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126 return (EADDRNOTAVAIL);
127 rp = sotorawcb(so);
74f1caca 128 nam = m_copym(nam, 0, M_COPYALL, MB_TRYWAIT);
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129 rp->rcb_laddr = mtod(nam, struct sockaddr *);
130 return (0);
131}
132#endif