raw_cb.c revision 1.3 
1/*
2 * Copyright (c) 1980, 1986 Regents of the University of California.
3 * 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 *	from: @(#)raw_cb.c	7.11 (Berkeley) 6/28/90
34 *	$Id: raw_cb.c,v 1.3 1993/05/22 11:42:15 cgd Exp $
35 */
36
37#include "param.h"
38#include "systm.h"
39#include "mbuf.h"
40#include "socket.h"
41#include "socketvar.h"
42#include "domain.h"
43#include "protosw.h"
44#include "errno.h"
45
46#include "if.h"
47#include "route.h"
48#include "raw_cb.h"
49#include "../netinet/in.h"
50
51#include "machine/mtpr.h"
52
53/*
54 * Routines to manage the raw protocol control blocks.
55 *
56 * TODO:
57 *	hash lookups by protocol family/protocol + address family
58 *	take care of unique address problems per AF?
59 *	redo address binding to allow wildcards
60 */
61
62u_long	raw_sendspace = RAWSNDQ;
63u_long	raw_recvspace = RAWRCVQ;
64
65/*
66 * Allocate a control block and a nominal amount
67 * of buffer space for the socket.
68 */
69raw_attach(so, proto)
70	register struct socket *so;
71	int proto;
72{
73	register struct rawcb *rp = sotorawcb(so);
74	int error;
75
76	/*
77	 * It is assumed that raw_attach is called
78	 * after space has been allocated for the
79	 * rawcb.
80	 */
81	if (rp == 0)
82		return (ENOBUFS);
83	if (error = soreserve(so, raw_sendspace, raw_recvspace))
84		return (error);
85	rp->rcb_socket = so;
86	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
87	rp->rcb_proto.sp_protocol = proto;
88	insque(rp, &rawcb);
89	return (0);
90}
91
92/*
93 * Detach the raw connection block and discard
94 * socket resources.
95 */
96raw_detach(rp)
97	register struct rawcb *rp;
98{
99	struct socket *so = rp->rcb_socket;
100
101	so->so_pcb = 0;
102	sofree(so);
103	remque(rp);
104#ifdef notdef
105	if (rp->rcb_laddr)
106		m_freem(dtom(rp->rcb_laddr));
107	rp->rcb_laddr = 0;
108#endif
109	free((caddr_t)(rp), M_PCB);
110}
111
112/*
113 * Disconnect and possibly release resources.
114 */
115raw_disconnect(rp)
116	struct rawcb *rp;
117{
118
119#ifdef notdef
120	if (rp->rcb_faddr)
121		m_freem(dtom(rp->rcb_faddr));
122	rp->rcb_faddr = 0;
123#endif
124	if (rp->rcb_socket->so_state & SS_NOFDREF)
125		raw_detach(rp);
126}
127
128#ifdef notdef
129raw_bind(so, nam)
130	register struct socket *so;
131	struct mbuf *nam;
132{
133	struct sockaddr *addr = mtod(nam, struct sockaddr *);
134	register struct rawcb *rp;
135
136	if (ifnet == 0)
137		return (EADDRNOTAVAIL);
138	rp = sotorawcb(so);
139	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
140	rp->rcb_laddr = mtod(nam, struct sockaddr *);
141	return (0);
142}
143#endif
144