FreeBSD/Linux Kernel Cross Reference
sys/net/raw_cb.c
1 /* $NetBSD: raw_cb.c,v 1.17 2005/12/11 23:05:25 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: raw_cb.c,v 1.17 2005/12/11 23:05:25 thorpej Exp $");
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
60 struct rawcbhead rawcb = LIST_HEAD_INITIALIZER(rawcb);
61
62 u_long raw_sendspace = RAWSNDQ;
63 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(struct socket *so, int proto)
71 {
72 struct rawcb *rp = sotorawcb(so);
73 int error;
74
75 /*
76 * It is assumed that raw_attach is called
77 * after space has been allocated for the
78 * rawcb.
79 */
80 if (rp == 0)
81 return (ENOBUFS);
82 if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
83 return (error);
84 rp->rcb_socket = so;
85 rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
86 rp->rcb_proto.sp_protocol = proto;
87 LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
88 return (0);
89 }
90
91 /*
92 * Detach the raw connection block and discard
93 * socket resources.
94 */
95 void
96 raw_detach(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
115 raw_disconnect(struct rawcb *rp)
116 {
117
118 #ifdef notdef
119 if (rp->rcb_faddr)
120 m_freem(dtom(rp->rcb_faddr));
121 rp->rcb_faddr = 0;
122 #endif
123 if (rp->rcb_socket->so_state & SS_NOFDREF)
124 raw_detach(rp);
125 }
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