raw_cb.c revision 128019 
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 128019 2004-04-07 20:46:16Z imp $
31 */
32
33#include <sys/param.h>
34#include <sys/domain.h>
35#include <sys/malloc.h>
36#include <sys/protosw.h>
37#include <sys/socket.h>
38#include <sys/socketvar.h>
39#include <sys/systm.h>
40
41#include <net/raw_cb.h>
42
43/*
44 * Routines to manage the raw protocol control blocks.
45 *
46 * TODO:
47 *	hash lookups by protocol family/protocol + address family
48 *	take care of unique address problems per AF?
49 *	redo address binding to allow wildcards
50 */
51
52struct rawcb_list_head rawcb_list;
53
54static u_long	raw_sendspace = RAWSNDQ;
55static u_long	raw_recvspace = RAWRCVQ;
56
57/*
58 * Allocate a control block and a nominal amount
59 * of buffer space for the socket.
60 */
61int
62raw_attach(so, proto)
63	register struct socket *so;
64	int proto;
65{
66	register 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 == 0)
75		return (ENOBUFS);
76	error = soreserve(so, raw_sendspace, raw_recvspace);
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 */
90void
91raw_detach(rp)
92	register struct rawcb *rp;
93{
94	struct socket *so = rp->rcb_socket;
95
96	so->so_pcb = 0;
97	sotryfree(so);
98	LIST_REMOVE(rp, list);
99#ifdef notdef
100	if (rp->rcb_laddr)
101		m_freem(dtom(rp->rcb_laddr));
102	rp->rcb_laddr = 0;
103#endif
104	free((caddr_t)(rp), M_PCB);
105}
106
107/*
108 * Disconnect and possibly release resources.
109 */
110void
111raw_disconnect(rp)
112	struct rawcb *rp;
113{
114
115#ifdef notdef
116	if (rp->rcb_faddr)
117		m_freem(dtom(rp->rcb_faddr));
118	rp->rcb_faddr = 0;
119#endif
120	if (rp->rcb_socket->so_state & SS_NOFDREF)
121		raw_detach(rp);
122}
123
124#ifdef notdef
125#include <sys/mbuf.h>
126
127int
128raw_bind(so, nam)
129	register struct socket *so;
130	struct mbuf *nam;
131{
132	struct sockaddr *addr = mtod(nam, struct sockaddr *);
133	register struct rawcb *rp;
134
135	if (ifnet == 0)
136		return (EADDRNOTAVAIL);
137	rp = sotorawcb(so);
138	nam = m_copym(nam, 0, M_COPYALL, M_TRYWAIT);
139	rp->rcb_laddr = mtod(nam, struct sockaddr *);
140	return (0);
141}
142#endif
143