FreeBSD/Linux Kernel Cross Reference
sys/net/raw_cb.c
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 * $FreeBSD: releng/5.0/sys/net/raw_cb.c 107113 2002-11-20 19:00:54Z luigi $
35 */
36
37 #include <sys/param.h>
38 #include <sys/domain.h>
39 #include <sys/malloc.h>
40 #include <sys/protosw.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
43 #include <sys/systm.h>
44
45 #include <net/raw_cb.h>
46
47 /*
48 * Routines to manage the raw protocol control blocks.
49 *
50 * TODO:
51 * hash lookups by protocol family/protocol + address family
52 * take care of unique address problems per AF?
53 * redo address binding to allow wildcards
54 */
55
56 struct rawcb_list_head rawcb_list;
57
58 static u_long raw_sendspace = RAWSNDQ;
59 static u_long raw_recvspace = RAWRCVQ;
60
61 /*
62 * Allocate a control block and a nominal amount
63 * of buffer space for the socket.
64 */
65 int
66 raw_attach(so, proto)
67 register struct socket *so;
68 int proto;
69 {
70 register struct rawcb *rp = sotorawcb(so);
71 int error;
72
73 /*
74 * It is assumed that raw_attach is called
75 * after space has been allocated for the
76 * rawcb.
77 */
78 if (rp == 0)
79 return (ENOBUFS);
80 error = soreserve(so, raw_sendspace, raw_recvspace);
81 if (error)
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_list, rp, list);
87 return (0);
88 }
89
90 /*
91 * Detach the raw connection block and discard
92 * socket resources.
93 */
94 void
95 raw_detach(rp)
96 register struct rawcb *rp;
97 {
98 struct socket *so = rp->rcb_socket;
99
100 so->so_pcb = 0;
101 sotryfree(so);
102 LIST_REMOVE(rp, 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
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 #include <sys/mbuf.h>
130
131 int
132 raw_bind(so, nam)
133 register struct socket *so;
134 struct mbuf *nam;
135 {
136 struct sockaddr *addr = mtod(nam, struct sockaddr *);
137 register struct rawcb *rp;
138
139 if (ifnet == 0)
140 return (EADDRNOTAVAIL);
141 rp = sotorawcb(so);
142 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
143 rp->rcb_laddr = mtod(nam, struct sockaddr *);
144 return (0);
145 }
146 #endif
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