raw_cb.c revision 6afbf203bd570424ecf3f9d9d9ced17f82c81adc
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 1.11 1997/04/14 18:23:22 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_list_head rawcb_list;
62
63static u_long	raw_sendspace = RAWSNDQ;
64static u_long	raw_recvspace = RAWRCVQ;
65
66/*
67 * Allocate a control block and a nominal amount
68 * of buffer space for the socket.
69 */
70int
71raw_attach(so, proto)
72	register struct socket *so;
73	int proto;
74{
75	register struct rawcb *rp = sotorawcb(so);
76	int error;
77
78	/*
79	 * It is assumed that raw_attach is called
80	 * after space has been allocated for the
81	 * rawcb.
82	 */
83	if (rp == 0)
84		return (ENOBUFS);
85	error = soreserve(so, raw_sendspace, raw_recvspace);
86	if (error)
87		return (error);
88	rp->rcb_socket = so;
89	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
90	rp->rcb_proto.sp_protocol = proto;
91	LIST_INSERT_HEAD(&rawcb_list, rp, list);
92	return (0);
93}
94
95/*
96 * Detach the raw connection block and discard
97 * socket resources.
98 */
99void
100raw_detach(rp)
101	register struct rawcb *rp;
102{
103	struct socket *so = rp->rcb_socket;
104
105	so->so_pcb = 0;
106	sofree(so);
107	LIST_REMOVE(rp, list);
108#ifdef notdef
109	if (rp->rcb_laddr)
110		m_freem(dtom(rp->rcb_laddr));
111	rp->rcb_laddr = 0;
112#endif
113	free((caddr_t)(rp), M_PCB);
114}
115
116/*
117 * Disconnect and possibly release resources.
118 */
119void
120raw_disconnect(rp)
121	struct rawcb *rp;
122{
123
124#ifdef notdef
125	if (rp->rcb_faddr)
126		m_freem(dtom(rp->rcb_faddr));
127	rp->rcb_faddr = 0;
128#endif
129	if (rp->rcb_socket->so_state & SS_NOFDREF)
130		raw_detach(rp);
131}
132
133#ifdef notdef
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_WAITOK);
146	rp->rcb_laddr = mtod(nam, struct sockaddr *);
147	return (0);
148}
149#endif
150