raw_cb.c revision 9759 
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 1.4 1995/05/30 08:08:21 rgrimes Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/mbuf.h>
40#include <sys/socket.h>
41#include <sys/socketvar.h>
42#include <sys/domain.h>
43#include <sys/protosw.h>
44#include <sys/errno.h>
45
46#include <net/if.h>
47#include <net/route.h>
48#include <net/raw_cb.h>
49#include <netinet/in.h>
50
51/*
52 * Routines to manage the raw protocol control blocks.
53 *
54 * TODO:
55 *	hash lookups by protocol family/protocol + address family
56 *	take care of unique address problems per AF?
57 *	redo address binding to allow wildcards
58 */
59
60struct rawcb rawcb;
61u_long	raw_sendspace = RAWSNDQ;
62u_long	raw_recvspace = RAWRCVQ;
63
64/*
65 * Allocate a control block and a nominal amount
66 * of buffer space for the socket.
67 */
68int
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	error = soreserve(so, raw_sendspace, raw_recvspace);
84	if (error)
85		return (error);
86	rp->rcb_socket = so;
87	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
88	rp->rcb_proto.sp_protocol = proto;
89	insque(rp, &rawcb);
90	return (0);
91}
92
93/*
94 * Detach the raw connection block and discard
95 * socket resources.
96 */
97void
98raw_detach(rp)
99	register struct rawcb *rp;
100{
101	struct socket *so = rp->rcb_socket;
102
103	so->so_pcb = 0;
104	sofree(so);
105	remque(rp);
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
132int
133raw_bind(so, nam)
134	register struct socket *so;
135	struct mbuf *nam;
136{
137	struct sockaddr *addr = mtod(nam, struct sockaddr *);
138	register struct rawcb *rp;
139
140	if (ifnet == 0)
141		return (EADDRNOTAVAIL);
142	rp = sotorawcb(so);
143	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
144	rp->rcb_laddr = mtod(nam, struct sockaddr *);
145	return (0);
146}
147#endif
148