Fix whitespace.
[dragonfly.git] / sys / kern / uipc_domain.c
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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 $
517e1666 35 * $DragonFly: src/sys/kern/uipc_domain.c,v 1.6 2004/12/21 02:42:41 hsu Exp $
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36 */
37
38#include <sys/param.h>
39#include <sys/socket.h>
40#include <sys/protosw.h>
41#include <sys/domain.h>
42#include <sys/mbuf.h>
43#include <sys/kernel.h>
44#include <sys/socketvar.h>
45#include <sys/systm.h>
46#include <vm/vm_zone.h>
47
48/*
49 * System initialization
50 *
51 * Note: domain initialization wants to take place on a per domain basis
52 * as a result of traversing a linker set. Most likely, each domain
53 * want to call a registration function rather than being handled here
54 * in domaininit(). Probably this will look like:
55 *
56 * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx)
57 *
58 * Where 'xxx' is replaced by the address of a parameter struct to be
59 * passed to the doamin_add() function.
60 */
61
402ed7e1 62static void domaininit (void *);
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63SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
64
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65static void pffasttimo (void *);
66static void pfslowtimo (void *);
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67
68struct domain *domains;
69
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70static struct callout pffasttimo_ch;
71static struct callout pfslowtimo_ch;
72
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73/*
74 * Add a new protocol domain to the list of supported domains
75 * Note: you cant unload it again because a socket may be using it.
76 * XXX can't fail at this time.
77 */
78static void
79net_init_domain(struct domain *dp)
80{
1fd87d54 81 struct protosw *pr;
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82 int s;
83
84 s = splnet();
85 if (dp->dom_init)
86 (*dp->dom_init)();
517e1666 87 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
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88 if (pr->pr_usrreqs == 0)
89 panic("domaininit: %ssw[%d] has no usrreqs!",
90 dp->dom_name,
91 (int)(pr - dp->dom_protosw));
92 if (pr->pr_init)
93 (*pr->pr_init)();
94 }
95 /*
96 * update global informatio about maximums
97 */
98 max_hdr = max_linkhdr + max_protohdr;
99 max_datalen = MHLEN - max_hdr;
100 splx(s);
101}
102
103/*
104 * Add a new protocol domain to the list of supported domains
105 * Note: you cant unload it again because a socket may be using it.
106 * XXX can't fail at this time.
107 */
108void
109net_add_domain(void *data)
110{
111 int s;
112 struct domain *dp;
113
114 dp = (struct domain *)data;
115 s = splnet();
116 dp->dom_next = domains;
117 domains = dp;
118 splx(s);
119 net_init_domain(dp);
120}
121
122/* ARGSUSED*/
123static void
124domaininit(void *dummy)
125{
126 /*
127 * Before we do any setup, make sure to initialize the
128 * zone allocator we get struct sockets from. The obvious
129 * maximum number of sockets is `maxfiles', but it is possible
130 * to have a socket without an open file (e.g., a connection waiting
131 * to be accept(2)ed). Rather than think up and define a
132 * better value, we just use nmbclusters, since that's what people
133 * are told to increase first when the network runs out of memory.
134 * Perhaps we should have two pools, one of unlimited size
135 * for use during socreate(), and one ZONE_INTERRUPT pool for
136 * use in sonewconn().
137 */
138 socket_zone = zinit("socket", sizeof(struct socket), maxsockets,
139 ZONE_INTERRUPT, 0);
140
141 if (max_linkhdr < 16) /* XXX */
142 max_linkhdr = 16;
143
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144 callout_init(&pffasttimo_ch);
145 callout_init(&pfslowtimo_ch);
146 callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
147 callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
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148}
149
150
151struct protosw *
152pffindtype(family, type)
153 int family;
154 int type;
155{
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156 struct domain *dp;
157 struct protosw *pr;
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158
159 for (dp = domains; dp; dp = dp->dom_next)
160 if (dp->dom_family == family)
161 goto found;
162 return (0);
163found:
164 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
165 if (pr->pr_type && pr->pr_type == type)
166 return (pr);
167 return (0);
168}
169
170struct protosw *
171pffindproto(family, protocol, type)
172 int family;
173 int protocol;
174 int type;
175{
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176 struct domain *dp;
177 struct protosw *pr;
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178 struct protosw *maybe = 0;
179
180 if (family == 0)
181 return (0);
182 for (dp = domains; dp; dp = dp->dom_next)
183 if (dp->dom_family == family)
184 goto found;
185 return (0);
186found:
187 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
188 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
189 return (pr);
190
191 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
192 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
193 maybe = pr;
194 }
195 return (maybe);
196}
197
198void
199pfctlinput(cmd, sa)
200 int cmd;
201 struct sockaddr *sa;
202{
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203 struct domain *dp;
204 struct protosw *pr;
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205
206 for (dp = domains; dp; dp = dp->dom_next)
207 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
208 if (pr->pr_ctlinput)
209 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
210}
211
212void
213pfctlinput2(cmd, sa, ctlparam)
214 int cmd;
215 struct sockaddr *sa;
216 void *ctlparam;
217{
218 struct domain *dp;
219 struct protosw *pr;
220
221 if (!sa)
222 return;
223 for (dp = domains; dp; dp = dp->dom_next) {
224 /*
225 * the check must be made by xx_ctlinput() anyways, to
226 * make sure we use data item pointed to by ctlparam in
227 * correct way. the following check is made just for safety.
228 */
229 if (dp->dom_family != sa->sa_family)
230 continue;
231
232 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
233 if (pr->pr_ctlinput)
234 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
235 }
236}
237
238static void
239pfslowtimo(arg)
240 void *arg;
241{
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242 struct domain *dp;
243 struct protosw *pr;
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244
245 for (dp = domains; dp; dp = dp->dom_next)
246 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
247 if (pr->pr_slowtimo)
248 (*pr->pr_slowtimo)();
a330847e 249 callout_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL);
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250}
251
252static void
253pffasttimo(arg)
254 void *arg;
255{
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256 struct domain *dp;
257 struct protosw *pr;
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258
259 for (dp = domains; dp; dp = dp->dom_next)
260 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
261 if (pr->pr_fasttimo)
262 (*pr->pr_fasttimo)();
a330847e 263 callout_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL);
984263bc 264}