raw_cb.c revision 139823 
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 * 4. 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: head/sys/net/raw_cb.c 139823 2005-01-07 01:45:51Z imp $
31 */
32
33#include <sys/param.h>
34#include <sys/domain.h>
35#include <sys/lock.h>
36#include <sys/malloc.h>
37#include <sys/mutex.h>
38#include <sys/protosw.h>
39#include <sys/socket.h>
40#include <sys/socketvar.h>
41#include <sys/systm.h>
42
43#include <net/raw_cb.h>
44
45/*
46 * Routines to manage the raw protocol control blocks.
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
54struct mtx rawcb_mtx;
55struct rawcb_list_head rawcb_list;
56
57const static u_long	raw_sendspace = RAWSNDQ;
58const static u_long	raw_recvspace = RAWRCVQ;
59
60/*
61 * Allocate a control block and a nominal amount
62 * of buffer space for the socket.
63 */
64int
65raw_attach(so, proto)
66	register struct socket *so;
67	int proto;
68{
69	register struct rawcb *rp = sotorawcb(so);
70	int error;
71
72	/*
73	 * It is assumed that raw_attach is called
74	 * after space has been allocated for the
75	 * rawcb.
76	 */
77	if (rp == 0)
78		return (ENOBUFS);
79	error = soreserve(so, raw_sendspace, raw_recvspace);
80	if (error)
81		return (error);
82	rp->rcb_socket = so;
83	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
84	rp->rcb_proto.sp_protocol = proto;
85	mtx_lock(&rawcb_mtx);
86	LIST_INSERT_HEAD(&rawcb_list, rp, list);
87	mtx_unlock(&rawcb_mtx);
88	return (0);
89}
90
91/*
92 * Detach the raw connection block and discard
93 * socket resources.
94 */
95void
96raw_detach(rp)
97	register struct rawcb *rp;
98{
99	struct socket *so = rp->rcb_socket;
100
101	ACCEPT_LOCK();
102	SOCK_LOCK(so);
103	so->so_pcb = 0;
104	sotryfree(so);
105	LIST_REMOVE(rp, list);
106#ifdef notdef
107	if (rp->rcb_laddr)
108		m_freem(dtom(rp->rcb_laddr));
109	rp->rcb_laddr = 0;
110#endif
111	free((caddr_t)(rp), M_PCB);
112}
113
114/*
115 * Disconnect and possibly release resources.
116 */
117void
118raw_disconnect(rp)
119	struct rawcb *rp;
120{
121
122#ifdef notdef
123	if (rp->rcb_faddr)
124		m_freem(dtom(rp->rcb_faddr));
125	rp->rcb_faddr = 0;
126#endif
127	if (rp->rcb_socket->so_state & SS_NOFDREF)
128		raw_detach(rp);
129}
130
131#ifdef notdef
132#include <sys/mbuf.h>
133
134int
135raw_bind(so, nam)
136	register struct socket *so;
137	struct mbuf *nam;
138{
139	struct sockaddr *addr = mtod(nam, struct sockaddr *);
140	register struct rawcb *rp;
141
142	if (ifnet == 0)
143		return (EADDRNOTAVAIL);
144	rp = sotorawcb(so);
145	nam = m_copym(nam, 0, M_COPYALL, M_TRYWAIT);
146	rp->rcb_laddr = mtod(nam, struct sockaddr *);
147	return (0);
148}
149#endif
150