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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)raw_cb.c 8.1 (Berkeley) 6/10/93
30 * $FreeBSD$
31 */
32
33 #include <sys/param.h>
34 #include <sys/domain.h>
35 #include <sys/lock.h>
36 #include <sys/malloc.h>
37 #include <sys/mutex.h>
38 #include <sys/protosw.h>
39 #include <sys/socket.h>
40 #include <sys/socketvar.h>
41 #include <sys/systm.h>
42
43 #include <net/raw_cb.h>
44
45 /*
46 * Routines to manage the raw protocol control blocks.
47 *
48 * TODO:
49 * hash lookups by protocol family/protocol + address family
50 * take care of unique address problems per AF?
51 * redo address binding to allow wildcards
52 */
53
54 struct mtx rawcb_mtx;
55 struct rawcb_list_head rawcb_list;
56
57 const static u_long raw_sendspace = RAWSNDQ;
58 const static u_long raw_recvspace = RAWRCVQ;
59
60 /*
61 * Allocate a control block and a nominal amount
62 * of buffer space for the socket.
63 */
64 int
65 raw_attach(so, proto)
66 register struct socket *so;
67 int proto;
68 {
69 register struct rawcb *rp = sotorawcb(so);
70 int error;
71
72 /*
73 * It is assumed that raw_attach is called
74 * after space has been allocated for the
75 * rawcb.
76 */
77 if (rp == 0)
78 return (ENOBUFS);
79 error = soreserve(so, raw_sendspace, raw_recvspace);
80 if (error)
81 return (error);
82 rp->rcb_socket = so;
83 rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
84 rp->rcb_proto.sp_protocol = proto;
85 mtx_lock(&rawcb_mtx);
86 LIST_INSERT_HEAD(&rawcb_list, rp, list);
87 mtx_unlock(&rawcb_mtx);
88 return (0);
89 }
90
91 /*
92 * Detach the raw connection block and discard
93 * socket resources.
94 */
95 void
96 raw_detach(rp)
97 register struct rawcb *rp;
98 {
99 struct socket *so = rp->rcb_socket;
100
101 ACCEPT_LOCK();
102 SOCK_LOCK(so);
103 so->so_pcb = 0;
104 sotryfree(so);
105 mtx_lock(&rawcb_mtx);
106 LIST_REMOVE(rp, list);
107 mtx_unlock(&rawcb_mtx);
108 #ifdef notdef
109 if (rp->rcb_laddr)
110 m_freem(dtom(rp->rcb_laddr));
111 rp->rcb_laddr = 0;
112 #endif
113 free((caddr_t)(rp), M_PCB);
114 }
115
116 /*
117 * Disconnect and possibly release resources.
118 */
119 void
120 raw_disconnect(rp)
121 struct rawcb *rp;
122 {
123
124 #ifdef notdef
125 if (rp->rcb_faddr)
126 m_freem(dtom(rp->rcb_faddr));
127 rp->rcb_faddr = 0;
128 #endif
129 if (rp->rcb_socket->so_state & SS_NOFDREF)
130 raw_detach(rp);
131 }
132
133 #ifdef notdef
134 #include <sys/mbuf.h>
135
136 int
137 raw_bind(so, nam)
138 register struct socket *so;
139 struct mbuf *nam;
140 {
141 struct sockaddr *addr = mtod(nam, struct sockaddr *);
142 register struct rawcb *rp;
143
144 if (ifnet == 0)
145 return (EADDRNOTAVAIL);
146 rp = sotorawcb(so);
147 nam = m_copym(nam, 0, M_COPYALL, M_TRYWAIT);
148 rp->rcb_laddr = mtod(nam, struct sockaddr *);
149 return (0);
150 }
151 #endif
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