xref: /dragonfly/sys/net/raw_cb.c (revision 31524921)
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 
42 /*
43  * Routines to manage the raw protocol control blocks.
44  *
45  * TODO:
46  *	hash lookups by protocol family/protocol + address family
47  *	take care of unique address problems per AF?
48  *	redo address binding to allow wildcards
49  */
50 
51 struct rawcb_list_head rawcb_list;
52 
53 static u_long	raw_sendspace = RAWSNDQ;
54 static u_long	raw_recvspace = RAWRCVQ;
55 
56 /*
57  * Allocate a control block and a nominal amount
58  * of buffer space for the socket.
59  *
60  * The so->so_pcb has already been assigned by the caller, and the
61  * caller has also already bumped the socket refs.
62  */
63 int
64 raw_attach(struct socket *so, int proto, struct rlimit *rl)
65 {
66 	struct rawcb *rp = sotorawcb(so);
67 	int error;
68 
69 	/*
70 	 * It is assumed that raw_attach is called
71 	 * after space has been allocated for the
72 	 * rawcb.
73 	 */
74 	if (rp == NULL)
75 		return (ENOBUFS);
76 	error = soreserve(so, raw_sendspace, raw_recvspace, rl);
77 	if (error)
78 		return (error);
79 	rp->rcb_socket = so;
80 	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
81 	rp->rcb_proto.sp_protocol = proto;
82 	LIST_INSERT_HEAD(&rawcb_list, rp, list);
83 	return (0);
84 }
85 
86 /*
87  * Detach the raw connection block and discard
88  * socket resources.
89  */
90 void
91 raw_detach(struct rawcb *rp)
92 {
93 	struct socket *so = rp->rcb_socket;
94 
95 	so->so_pcb = NULL;
96 	sofree(so);		/* remove pcb ref */
97 	LIST_REMOVE(rp, list);
98 	kfree(rp, M_PCB);
99 }
100 
101 /*
102  * Disconnect and possibly release resources.
103  */
104 void
105 raw_disconnect(struct rawcb *rp)
106 {
107 	if (rp->rcb_socket->so_state & SS_NOFDREF)
108 		raw_detach(rp);
109 }
110 
111 #ifdef notdef
112 #include <sys/mbuf.h>
113 
114 int
115 raw_bind(struct socket *so, struct mbuf *nam)
116 {
117 	struct sockaddr *addr = mtod(nam, struct sockaddr *);
118 	struct rawcb *rp;
119 
120 	if (ifnet == NULL)
121 		return (EADDRNOTAVAIL);
122 	rp = sotorawcb(so);
123 	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
124 	rp->rcb_laddr = mtod(nam, struct sockaddr *);
125 	return (0);
126 }
127 #endif
128