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. 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: src/sys/net/raw_cb.c,v 1.16 1999/08/28 00:48:27 peter Exp $
31 */
32
33 #include <sys/param.h>
34 #include <sys/malloc.h>
35 #include <sys/socket.h>
36 #include <sys/socketvar.h>
37 #include <sys/domain.h>
38 #include <sys/protosw.h>
39
40 #include <net/raw_cb.h>
41 #include <net/netisr2.h>
42
43 /*
44 * Routines to manage the raw protocol control blocks.
45 *
46 * All of them must run in netisr0.
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 rawcb_list_head rawcb_list;
55
56 static u_long raw_sendspace = RAWSNDQ;
57 static u_long raw_recvspace = RAWRCVQ;
58
59 /*
60 * Allocate a control block and a nominal amount
61 * of buffer space for the socket.
62 *
63 * The so->so_pcb has already been assigned by the caller, and the
64 * caller has also already bumped the socket refs.
65 */
66 int
raw_attach(struct socket * so,int proto,struct rlimit * rl)67 raw_attach(struct socket *so, int proto, struct rlimit *rl)
68 {
69 struct rawcb *rp = sotorawcb(so);
70 int error;
71
72 ASSERT_NETISR0;
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 == NULL)
80 return (ENOBUFS);
81 error = soreserve(so, raw_sendspace, raw_recvspace, rl);
82 if (error)
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
88 LIST_INSERT_HEAD(&rawcb_list, rp, list);
89
90 return (0);
91 }
92
93 /*
94 * Detach the raw connection block and discard
95 * socket resources.
96 */
97 void
raw_detach(struct rawcb * rp)98 raw_detach(struct rawcb *rp)
99 {
100 struct socket *so = rp->rcb_socket;
101
102 ASSERT_NETISR0;
103
104 LIST_REMOVE(rp, list);
105
106 so->so_pcb = NULL;
107 sofree(so); /* remove pcb ref */
108 kfree(rp, M_PCB);
109 }
110
111 /*
112 * Disconnect and possibly release resources.
113 */
114 void
raw_disconnect(struct rawcb * rp)115 raw_disconnect(struct rawcb *rp)
116 {
117 ASSERT_NETISR0;
118
119 if (rp->rcb_socket->so_state & SS_NOFDREF)
120 raw_detach(rp);
121 }
122
123 #ifdef notdef
124 #include <sys/mbuf.h>
125
126 int
raw_bind(struct socket * so,struct mbuf * nam)127 raw_bind(struct socket *so, struct mbuf *nam)
128 {
129 struct sockaddr *addr = mtod(nam, struct sockaddr *);
130 struct rawcb *rp;
131
132 ASSERT_NETISR0;
133
134 if (ifnet == NULL)
135 return (EADDRNOTAVAIL);
136 rp = sotorawcb(so);
137 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
138 rp->rcb_laddr = mtod(nam, struct sockaddr *);
139 return (0);
140 }
141 #endif
142