1 /* $OpenBSD: raw_cb.c,v 1.5 2003/12/10 07:22:42 itojun Exp $ */
2 /* $NetBSD: raw_cb.c,v 1.9 1996/02/13 22:00:39 christos Exp $ */
3
4 /*
5 * Copyright (c) 1980, 1986, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
33 */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/mbuf.h>
38 #include <sys/socket.h>
39 #include <sys/socketvar.h>
40 #include <sys/domain.h>
41 #include <sys/protosw.h>
42 #include <sys/errno.h>
43
44 #include <net/if.h>
45 #include <net/route.h>
46 #include <net/raw_cb.h>
47 #include <netinet/in.h>
48
49 /*
50 * Routines to manage the raw protocol control blocks.
51 *
52 * TODO:
53 * hash lookups by protocol family/protocol + address family
54 * take care of unique address problems per AF?
55 * redo address binding to allow wildcards
56 */
57
58 u_long raw_sendspace = RAWSNDQ;
59 u_long raw_recvspace = RAWRCVQ;
60 struct rawcbhead rawcb;
61
62 /*
63 * Allocate a control block and a nominal amount
64 * of buffer space for the socket.
65 */
66 int
raw_attach(so,proto)67 raw_attach(so, proto)
68 struct socket *so;
69 int proto;
70 {
71 struct rawcb *rp = sotorawcb(so);
72 int error;
73
74 /*
75 * It is assumed that raw_attach is called
76 * after space has been allocated for the
77 * rawcb.
78 */
79 if (rp == 0)
80 return (ENOBUFS);
81 if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
82 return (error);
83 rp->rcb_socket = so;
84 rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
85 rp->rcb_proto.sp_protocol = proto;
86 LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
87 return (0);
88 }
89
90 /*
91 * Detach the raw connection block and discard
92 * socket resources.
93 */
94 void
raw_detach(rp)95 raw_detach(rp)
96 struct rawcb *rp;
97 {
98 struct socket *so = rp->rcb_socket;
99
100 so->so_pcb = 0;
101 sofree(so);
102 LIST_REMOVE(rp, rcb_list);
103 #ifdef notdef
104 if (rp->rcb_laddr)
105 m_freem(dtom(rp->rcb_laddr));
106 rp->rcb_laddr = 0;
107 #endif
108 free((caddr_t)(rp), M_PCB);
109 }
110
111 /*
112 * Disconnect and possibly release resources.
113 */
114 void
raw_disconnect(rp)115 raw_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
129 int
raw_bind(so,nam)130 raw_bind(so, nam)
131 struct socket *so;
132 struct mbuf *nam;
133 {
134 struct sockaddr *addr = mtod(nam, struct sockaddr *);
135 struct rawcb *rp;
136
137 if (ifnet == 0)
138 return (EADDRNOTAVAIL);
139 rp = sotorawcb(so);
140 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
141 rp->rcb_laddr = mtod(nam, struct sockaddr *);
142 return (0);
143 }
144 #endif
145