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: releng/5.0/sys/kern/uipc_domain.c 97658 2002-05-31 11:52:35Z tanimura $
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/uma.h>
46
47 /*
48 * System initialization
49 *
50 * Note: domain initialization takes place on a per domain basis
51 * as a result of traversing a SYSINIT linker set. Most likely,
52 * each domain would want to call DOMAIN_SET(9) itself, which
53 * would cause the domain to be added just after domaininit()
54 * is called during startup.
55 *
56 * See DOMAIN_SET(9) for details on its use.
57 */
58
59 static void domaininit(void *);
60 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
61
62 static struct callout pffast_callout;
63 static struct callout pfslow_callout;
64
65 static void pffasttimo(void *);
66 static void pfslowtimo(void *);
67
68 struct domain *domains;
69
70 /*
71 * Add a new protocol domain to the list of supported domains
72 * Note: you cant unload it again because a socket may be using it.
73 * XXX can't fail at this time.
74 */
75 static void
76 net_init_domain(struct domain *dp)
77 {
78 register struct protosw *pr;
79 int s;
80
81 s = splnet();
82 if (dp->dom_init)
83 (*dp->dom_init)();
84 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
85 if (pr->pr_usrreqs == 0)
86 panic("domaininit: %ssw[%d] has no usrreqs!",
87 dp->dom_name,
88 (int)(pr - dp->dom_protosw));
89 if (pr->pr_init)
90 (*pr->pr_init)();
91 }
92 /*
93 * update global informatio about maximums
94 */
95 max_hdr = max_linkhdr + max_protohdr;
96 max_datalen = MHLEN - max_hdr;
97 splx(s);
98 }
99
100 /*
101 * Add a new protocol domain to the list of supported domains
102 * Note: you cant unload it again because a socket may be using it.
103 * XXX can't fail at this time.
104 */
105 void
106 net_add_domain(void *data)
107 {
108 int s;
109 struct domain *dp;
110
111 dp = (struct domain *)data;
112 s = splnet();
113 dp->dom_next = domains;
114 domains = dp;
115 splx(s);
116 net_init_domain(dp);
117 }
118
119 /* ARGSUSED*/
120 static void
121 domaininit(void *dummy)
122 {
123 /*
124 * Before we do any setup, make sure to initialize the
125 * zone allocator we get struct sockets from.
126 */
127
128 socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
129 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
130 uma_zone_set_max(socket_zone, maxsockets);
131
132 if (max_linkhdr < 16) /* XXX */
133 max_linkhdr = 16;
134
135 callout_init(&pffast_callout, 0);
136 callout_init(&pfslow_callout, 0);
137
138 callout_reset(&pffast_callout, 1, pffasttimo, NULL);
139 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
140 }
141
142
143 struct protosw *
144 pffindtype(family, type)
145 int family;
146 int type;
147 {
148 register struct domain *dp;
149 register struct protosw *pr;
150
151 for (dp = domains; dp; dp = dp->dom_next)
152 if (dp->dom_family == family)
153 goto found;
154 return (0);
155 found:
156 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
157 if (pr->pr_type && pr->pr_type == type)
158 return (pr);
159 return (0);
160 }
161
162 struct protosw *
163 pffindproto(family, protocol, type)
164 int family;
165 int protocol;
166 int type;
167 {
168 register struct domain *dp;
169 register struct protosw *pr;
170 struct protosw *maybe = 0;
171
172 if (family == 0)
173 return (0);
174 for (dp = domains; dp; dp = dp->dom_next)
175 if (dp->dom_family == family)
176 goto found;
177 return (0);
178 found:
179 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
180 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
181 return (pr);
182
183 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
184 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
185 maybe = pr;
186 }
187 return (maybe);
188 }
189
190 void
191 pfctlinput(cmd, sa)
192 int cmd;
193 struct sockaddr *sa;
194 {
195 register struct domain *dp;
196 register struct protosw *pr;
197
198 for (dp = domains; dp; dp = dp->dom_next)
199 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
200 if (pr->pr_ctlinput)
201 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
202 }
203
204 void
205 pfctlinput2(cmd, sa, ctlparam)
206 int cmd;
207 struct sockaddr *sa;
208 void *ctlparam;
209 {
210 struct domain *dp;
211 struct protosw *pr;
212
213 if (!sa)
214 return;
215 for (dp = domains; dp; dp = dp->dom_next) {
216 /*
217 * the check must be made by xx_ctlinput() anyways, to
218 * make sure we use data item pointed to by ctlparam in
219 * correct way. the following check is made just for safety.
220 */
221 if (dp->dom_family != sa->sa_family)
222 continue;
223
224 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
225 if (pr->pr_ctlinput)
226 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
227 }
228 }
229
230 static void
231 pfslowtimo(arg)
232 void *arg;
233 {
234 register struct domain *dp;
235 register struct protosw *pr;
236
237 for (dp = domains; dp; dp = dp->dom_next)
238 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
239 if (pr->pr_slowtimo)
240 (*pr->pr_slowtimo)();
241 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
242 }
243
244 static void
245 pffasttimo(arg)
246 void *arg;
247 {
248 register struct domain *dp;
249 register struct protosw *pr;
250
251 for (dp = domains; dp; dp = dp->dom_next)
252 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
253 if (pr->pr_fasttimo)
254 (*pr->pr_fasttimo)();
255 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
256 }
Cache object: c46de9f9e718470de5952d13728e4cf1
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