raw_cb.c revision 14546 
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 * $Id: raw_cb.c,v 1.7 1995/12/14 09:53:25 phk Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/queue.h>
39#include <sys/systm.h>
40#include <sys/mbuf.h>
41#include <sys/socket.h>
42#include <sys/socketvar.h>
43#include <sys/domain.h>
44#include <sys/protosw.h>
45#include <sys/errno.h>
46
47#include <net/if.h>
48#include <net/route.h>
49#include <net/raw_cb.h>
50#include <netinet/in.h>
51
52/*
53 * Routines to manage the raw protocol control blocks.
54 *
55 * TODO:
56 *	hash lookups by protocol family/protocol + address family
57 *	take care of unique address problems per AF?
58 *	redo address binding to allow wildcards
59 */
60
61struct rawcb rawcb;
62static u_long	raw_sendspace = RAWSNDQ;
63static u_long	raw_recvspace = RAWRCVQ;
64
65/*
66 * Allocate a control block and a nominal amount
67 * of buffer space for the socket.
68 */
69int
70raw_attach(so, proto)
71	register struct socket *so;
72	int proto;
73{
74	register struct rawcb *rp = sotorawcb(so);
75	int error;
76
77	/*
78	 * It is assumed that raw_attach is called
79	 * after space has been allocated for the
80	 * rawcb.
81	 */
82	if (rp == 0)
83		return (ENOBUFS);
84	error = soreserve(so, raw_sendspace, raw_recvspace);
85	if (error)
86		return (error);
87	rp->rcb_socket = so;
88	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
89	rp->rcb_proto.sp_protocol = proto;
90	insque(rp, &rawcb);
91	return (0);
92}
93
94/*
95 * Detach the raw connection block and discard
96 * socket resources.
97 */
98void
99raw_detach(rp)
100	register struct rawcb *rp;
101{
102	struct socket *so = rp->rcb_socket;
103
104	so->so_pcb = 0;
105	sofree(so);
106	remque(rp);
107#ifdef notdef
108	if (rp->rcb_laddr)
109		m_freem(dtom(rp->rcb_laddr));
110	rp->rcb_laddr = 0;
111#endif
112	free((caddr_t)(rp), M_PCB);
113}
114
115/*
116 * Disconnect and possibly release resources.
117 */
118void
119raw_disconnect(rp)
120	struct rawcb *rp;
121{
122
123#ifdef notdef
124	if (rp->rcb_faddr)
125		m_freem(dtom(rp->rcb_faddr));
126	rp->rcb_faddr = 0;
127#endif
128	if (rp->rcb_socket->so_state & SS_NOFDREF)
129		raw_detach(rp);
130}
131
132#ifdef notdef
133int
134raw_bind(so, nam)
135	register struct socket *so;
136	struct mbuf *nam;
137{
138	struct sockaddr *addr = mtod(nam, struct sockaddr *);
139	register struct rawcb *rp;
140
141	if (ifnet == 0)
142		return (EADDRNOTAVAIL);
143	rp = sotorawcb(so);
144	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
145	rp->rcb_laddr = mtod(nam, struct sockaddr *);
146	return (0);
147}
148#endif
149