Initial import from FreeBSD RELENG_4:
[dragonfly.git] / sys / kern / uipc_domain.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1982, 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 * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
34 * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.22.2.1 2001/07/03 11:01:37 ume Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/socket.h>
39#include <sys/protosw.h>
40#include <sys/domain.h>
41#include <sys/mbuf.h>
42#include <sys/kernel.h>
43#include <sys/socketvar.h>
44#include <sys/systm.h>
45#include <vm/vm_zone.h>
46
47/*
48 * System initialization
49 *
50 * Note: domain initialization wants to take place on a per domain basis
51 * as a result of traversing a linker set. Most likely, each domain
52 * want to call a registration function rather than being handled here
53 * in domaininit(). Probably this will look like:
54 *
55 * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx)
56 *
57 * Where 'xxx' is replaced by the address of a parameter struct to be
58 * passed to the doamin_add() function.
59 */
60
61static void domaininit __P((void *));
62SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
63
64static void pffasttimo __P((void *));
65static void pfslowtimo __P((void *));
66
67struct domain *domains;
68
69/*
70 * Add a new protocol domain to the list of supported domains
71 * Note: you cant unload it again because a socket may be using it.
72 * XXX can't fail at this time.
73 */
74static void
75net_init_domain(struct domain *dp)
76{
77 register struct protosw *pr;
78 int s;
79
80 s = splnet();
81 if (dp->dom_init)
82 (*dp->dom_init)();
83 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
84 if (pr->pr_usrreqs == 0)
85 panic("domaininit: %ssw[%d] has no usrreqs!",
86 dp->dom_name,
87 (int)(pr - dp->dom_protosw));
88 if (pr->pr_init)
89 (*pr->pr_init)();
90 }
91 /*
92 * update global informatio about maximums
93 */
94 max_hdr = max_linkhdr + max_protohdr;
95 max_datalen = MHLEN - max_hdr;
96 splx(s);
97}
98
99/*
100 * Add a new protocol domain to the list of supported domains
101 * Note: you cant unload it again because a socket may be using it.
102 * XXX can't fail at this time.
103 */
104void
105net_add_domain(void *data)
106{
107 int s;
108 struct domain *dp;
109
110 dp = (struct domain *)data;
111 s = splnet();
112 dp->dom_next = domains;
113 domains = dp;
114 splx(s);
115 net_init_domain(dp);
116}
117
118/* ARGSUSED*/
119static void
120domaininit(void *dummy)
121{
122 /*
123 * Before we do any setup, make sure to initialize the
124 * zone allocator we get struct sockets from. The obvious
125 * maximum number of sockets is `maxfiles', but it is possible
126 * to have a socket without an open file (e.g., a connection waiting
127 * to be accept(2)ed). Rather than think up and define a
128 * better value, we just use nmbclusters, since that's what people
129 * are told to increase first when the network runs out of memory.
130 * Perhaps we should have two pools, one of unlimited size
131 * for use during socreate(), and one ZONE_INTERRUPT pool for
132 * use in sonewconn().
133 */
134 socket_zone = zinit("socket", sizeof(struct socket), maxsockets,
135 ZONE_INTERRUPT, 0);
136
137 if (max_linkhdr < 16) /* XXX */
138 max_linkhdr = 16;
139
140 timeout(pffasttimo, (void *)0, 1);
141 timeout(pfslowtimo, (void *)0, 1);
142}
143
144
145struct protosw *
146pffindtype(family, type)
147 int family;
148 int type;
149{
150 register struct domain *dp;
151 register struct protosw *pr;
152
153 for (dp = domains; dp; dp = dp->dom_next)
154 if (dp->dom_family == family)
155 goto found;
156 return (0);
157found:
158 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
159 if (pr->pr_type && pr->pr_type == type)
160 return (pr);
161 return (0);
162}
163
164struct protosw *
165pffindproto(family, protocol, type)
166 int family;
167 int protocol;
168 int type;
169{
170 register struct domain *dp;
171 register struct protosw *pr;
172 struct protosw *maybe = 0;
173
174 if (family == 0)
175 return (0);
176 for (dp = domains; dp; dp = dp->dom_next)
177 if (dp->dom_family == family)
178 goto found;
179 return (0);
180found:
181 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
182 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
183 return (pr);
184
185 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
186 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
187 maybe = pr;
188 }
189 return (maybe);
190}
191
192void
193pfctlinput(cmd, sa)
194 int cmd;
195 struct sockaddr *sa;
196{
197 register struct domain *dp;
198 register struct protosw *pr;
199
200 for (dp = domains; dp; dp = dp->dom_next)
201 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
202 if (pr->pr_ctlinput)
203 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
204}
205
206void
207pfctlinput2(cmd, sa, ctlparam)
208 int cmd;
209 struct sockaddr *sa;
210 void *ctlparam;
211{
212 struct domain *dp;
213 struct protosw *pr;
214
215 if (!sa)
216 return;
217 for (dp = domains; dp; dp = dp->dom_next) {
218 /*
219 * the check must be made by xx_ctlinput() anyways, to
220 * make sure we use data item pointed to by ctlparam in
221 * correct way. the following check is made just for safety.
222 */
223 if (dp->dom_family != sa->sa_family)
224 continue;
225
226 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
227 if (pr->pr_ctlinput)
228 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
229 }
230}
231
232static void
233pfslowtimo(arg)
234 void *arg;
235{
236 register struct domain *dp;
237 register struct protosw *pr;
238
239 for (dp = domains; dp; dp = dp->dom_next)
240 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
241 if (pr->pr_slowtimo)
242 (*pr->pr_slowtimo)();
243 timeout(pfslowtimo, (void *)0, hz/2);
244}
245
246static void
247pffasttimo(arg)
248 void *arg;
249{
250 register struct domain *dp;
251 register struct protosw *pr;
252
253 for (dp = domains; dp; dp = dp->dom_next)
254 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
255 if (pr->pr_fasttimo)
256 (*pr->pr_fasttimo)();
257 timeout(pffasttimo, (void *)0, hz/5);
258}