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: src/sys/net/raw_cb.c,v 1.8.4.1 1999/09/05 08:17:57 peter 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
61 struct rawcb rawcb;
62 static u_long raw_sendspace = RAWSNDQ;
63 static u_long raw_recvspace = RAWRCVQ;
64
65 /*
66 * Allocate a control block and a nominal amount
67 * of buffer space for the socket.
68 */
69 int
70 raw_attach(so, proto)
71 register struct socket *so;
72 int proto;
73 {
74 register struct rawcb *rp = sotorawcb(so);
75 int error;
76
77 /*
78 * It is assumed that raw_attach is called
79 * after space has been allocated for the
80 * rawcb.
81 */
82 if (rp == 0)
83 return (ENOBUFS);
84 error = soreserve(so, raw_sendspace, raw_recvspace);
85 if (error)
86 return (error);
87 rp->rcb_socket = so;
88 rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
89 rp->rcb_proto.sp_protocol = proto;
90 insque(rp, &rawcb);
91 return (0);
92 }
93
94 /*
95 * Detach the raw connection block and discard
96 * socket resources.
97 */
98 void
99 raw_detach(rp)
100 register struct rawcb *rp;
101 {
102 struct socket *so = rp->rcb_socket;
103
104 so->so_pcb = 0;
105 sofree(so);
106 remque(rp);
107 #ifdef notdef
108 if (rp->rcb_laddr)
109 m_freem(dtom(rp->rcb_laddr));
110 rp->rcb_laddr = 0;
111 #endif
112 free((caddr_t)(rp), M_PCB);
113 }
114
115 /*
116 * Disconnect and possibly release resources.
117 */
118 void
119 raw_disconnect(rp)
120 struct rawcb *rp;
121 {
122
123 #ifdef notdef
124 if (rp->rcb_faddr)
125 m_freem(dtom(rp->rcb_faddr));
126 rp->rcb_faddr = 0;
127 #endif
128 if (rp->rcb_socket->so_state & SS_NOFDREF)
129 raw_detach(rp);
130 }
131
132 #ifdef notdef
133 int
134 raw_bind(so, nam)
135 register struct socket *so;
136 struct mbuf *nam;
137 {
138 struct sockaddr *addr = mtod(nam, struct sockaddr *);
139 register struct rawcb *rp;
140
141 if (ifnet == 0)
142 return (EADDRNOTAVAIL);
143 rp = sotorawcb(so);
144 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
145 rp->rcb_laddr = mtod(nam, struct sockaddr *);
146 return (0);
147 }
148 #endif
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