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 * $Id: uipc_domain.c,v 1.17 1997/04/27 20:00:42 wollman 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/systm.h>
44
45/*
46 * System initialization
47 *
48 * Note: domain initialization wants to take place on a per domain basis
49 * as a result of traversing a linker set. Most likely, each domain
50 * want to call a registration function rather than being handled here
51 * in domaininit(). Probably this will look like:
52 *
53 * SYSINIT(unique, SI_SUB_PROTO_DOMAI, SI_ORDER_ANY, domain_add, xxx)
54 *
55 * Where 'xxx' is replaced by the address of a parameter struct to be
56 * passed to the doamin_add() function.
57 */
58
59static int x_save_spl; /* used by kludge*/
60static void kludge_splimp __P((void *));
61static void kludge_splx __P((void *));
62static void domaininit __P((void *));
63SYSINIT(splimp, SI_SUB_PROTO_BEGIN, SI_ORDER_FIRST, kludge_splimp, &x_save_spl)
64SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
65SYSINIT(splx, SI_SUB_PROTO_END, SI_ORDER_FIRST, kludge_splx, &x_save_spl)
66
67static void pffasttimo __P((void *));
68static void pfslowtimo __P((void *));
69
70struct domain *domains;
71
72#define ADDDOMAIN(x) { \
73 __CONCAT(x,domain.dom_next) = domains; \
74 domains = &__CONCAT(x,domain); \
75}
76
77extern struct linker_set domain_set;
78
79/* ARGSUSED*/
80static void
81domaininit(dummy)
82 void *dummy;
83{
84 register struct domain *dp, **dpp;
85 register struct protosw *pr;
86
87 /*
88 * NB - local domain is always present.
89 */
90 ADDDOMAIN(local);
91
92 for (dpp = (struct domain **)domain_set.ls_items; *dpp; dpp++) {
93 (**dpp).dom_next = domains;
94 domains = *dpp;
95 }
96
97/* - not in our sources
98#ifdef ISDN
99 ADDDOMAIN(isdn);
100#endif
101*/
102
103 for (dp = domains; dp; dp = dp->dom_next) {
104 if (dp->dom_init)
105 (*dp->dom_init)();
106 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
107#ifdef PRU_OLDSTYLE
108 /* See comments in uipc_socket2.c. */
109 if (pr->pr_usrreqs == 0 && pr->pr_ousrreq)
110 pr->pr_usrreqs = &pru_oldstyle;
111#else
112 if (pr->pr_usrreqs == 0)
113 panic("domaininit: %ssw[%d] has no usrreqs!",
114 dp->dom_name,
115 (int)(pr - dp->dom_protosw));
116#endif
117 if (pr->pr_init)
118 (*pr->pr_init)();
119 }
120 }
121
122 if (max_linkhdr < 16) /* XXX */
123 max_linkhdr = 16;
124 max_hdr = max_linkhdr + max_protohdr;
125 max_datalen = MHLEN - max_hdr;
126 timeout(pffasttimo, (void *)0, 1);
127 timeout(pfslowtimo, (void *)0, 1);
128}
129
130
131/*
132 * The following two operations are kludge code. Most likely, they should
133 * be done as a "domainpreinit()" for the first function and then rolled
134 * in as the last act of "domaininit()" for the second.
135 *
136 * In point of fact, it is questionable why other initialization prior
137 * to this does not also take place at splimp by default.
138 */
139static void
140kludge_splimp(udata)
141 void *udata;
142{
143 int *savesplp = udata;
144
145 *savesplp = splimp();
146}
147
148static void
149kludge_splx(udata)
150 void *udata;
151{
152 int *savesplp = udata;
153
154 splx( *savesplp);
155}
156
157
158
159struct protosw *
160pffindtype(family, type)
161 int family;
162 int type;
163{
164 register struct domain *dp;
165 register struct protosw *pr;
166
167 for (dp = domains; dp; dp = dp->dom_next)
168 if (dp->dom_family == family)
169 goto found;
170 return (0);
171found:
172 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
173 if (pr->pr_type && pr->pr_type == type)
174 return (pr);
175 return (0);
176}
177
178struct protosw *
179pffindproto(family, protocol, type)
180 int family;
181 int protocol;
182 int type;
183{
184 register struct domain *dp;
185 register struct protosw *pr;
186 struct protosw *maybe = 0;
187
188 if (family == 0)
189 return (0);
190 for (dp = domains; dp; dp = dp->dom_next)
191 if (dp->dom_family == family)
192 goto found;
193 return (0);
194found:
195 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
196 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
197 return (pr);
198
199 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
200 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
201 maybe = pr;
202 }
203 return (maybe);
204}
205
206void
207pfctlinput(cmd, sa)
208 int cmd;
209 struct sockaddr *sa;
210{
211 register struct domain *dp;
212 register struct protosw *pr;
213
214 for (dp = domains; dp; dp = dp->dom_next)
215 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
216 if (pr->pr_ctlinput)
217 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
218}
219
220static void
221pfslowtimo(arg)
222 void *arg;
223{
224 register struct domain *dp;
225 register struct protosw *pr;
226
227 for (dp = domains; dp; dp = dp->dom_next)
228 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
229 if (pr->pr_slowtimo)
230 (*pr->pr_slowtimo)();
231 timeout(pfslowtimo, (void *)0, hz/2);
232}
233
234static void
235pffasttimo(arg)
236 void *arg;
237{
238 register struct domain *dp;
239 register struct protosw *pr;
240
241 for (dp = domains; dp; dp = dp->dom_next)
242 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
243 if (pr->pr_fasttimo)
244 (*pr->pr_fasttimo)();
245 timeout(pffasttimo, (void *)0, hz/5);
246}