network - Completely revamp the netisr / dispatch code
[dragonfly.git] / sys / net / raw_cb.c
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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 1.16 1999/08/28 00:48:27 peter Exp $
efda3bd0 35 * $DragonFly: src/sys/net/raw_cb.c,v 1.11 2006/09/05 00:55:46 dillon Exp $
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36 */
37
38#include <sys/param.h>
39#include <sys/malloc.h>
40#include <sys/socket.h>
41#include <sys/socketvar.h>
42#include <sys/domain.h>
43#include <sys/protosw.h>
44
45#include <net/raw_cb.h>
46
47/*
48 * Routines to manage the raw protocol control blocks.
49 *
50 * TODO:
51 * hash lookups by protocol family/protocol + address family
52 * take care of unique address problems per AF?
53 * redo address binding to allow wildcards
54 */
55
56struct rawcb_list_head rawcb_list;
57
58static u_long raw_sendspace = RAWSNDQ;
59static u_long raw_recvspace = RAWRCVQ;
60
61/*
62 * Allocate a control block and a nominal amount
63 * of buffer space for the socket.
64 */
65int
e4700d00 66raw_attach(struct socket *so, int proto, struct rlimit *rl)
984263bc 67{
82ed7fc2 68 struct rawcb *rp = sotorawcb(so);
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69 int error;
70
71 /*
72 * It is assumed that raw_attach is called
73 * after space has been allocated for the
74 * rawcb.
75 */
590b8cd4 76 if (rp == NULL)
984263bc 77 return (ENOBUFS);
e4700d00 78 error = soreserve(so, raw_sendspace, raw_recvspace, rl);
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79 if (error)
80 return (error);
81 rp->rcb_socket = so;
82 rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
83 rp->rcb_proto.sp_protocol = proto;
84 LIST_INSERT_HEAD(&rawcb_list, rp, list);
85 return (0);
86}
87
88/*
89 * Detach the raw connection block and discard
90 * socket resources.
91 */
92void
8a3125c6 93raw_detach(struct rawcb *rp)
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94{
95 struct socket *so = rp->rcb_socket;
96
590b8cd4 97 so->so_pcb = NULL;
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98 sofree(so);
99 LIST_REMOVE(rp, list);
efda3bd0 100 kfree(rp, M_PCB);
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101}
102
103/*
104 * Disconnect and possibly release resources.
105 */
106void
8a3125c6 107raw_disconnect(struct rawcb *rp)
984263bc 108{
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109 if (rp->rcb_socket->so_state & SS_NOFDREF)
110 raw_detach(rp);
111}
112
113#ifdef notdef
114#include <sys/mbuf.h>
115
116int
8a3125c6 117raw_bind(struct socket *so, struct mbuf *nam)
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118{
119 struct sockaddr *addr = mtod(nam, struct sockaddr *);
82ed7fc2 120 struct rawcb *rp;
984263bc 121
590b8cd4 122 if (ifnet == NULL)
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123 return (EADDRNOTAVAIL);
124 rp = sotorawcb(so);
74f1caca 125 nam = m_copym(nam, 0, M_COPYALL, MB_TRYWAIT);
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126 rp->rcb_laddr = mtod(nam, struct sockaddr *);
127 return (0);
128}
129#endif