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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include <sys/param.h>
36 #include <sys/socket.h>
37 #include <sys/protosw.h>
38 #include <sys/domain.h>
39 #include <sys/mbuf.h>
40 #include <sys/kernel.h>
41 #include <sys/lock.h>
42 #include <sys/mutex.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; /* registered protocol domains */
69 struct mtx dom_mtx; /* domain list lock */
70 MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
71
72 /*
73 * Add a new protocol domain to the list of supported domains
74 * Note: you cant unload it again because a socket may be using it.
75 * XXX can't fail at this time.
76 */
77 static void
78 net_init_domain(struct domain *dp)
79 {
80 struct protosw *pr;
81
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 information about maximums
94 */
95 max_hdr = max_linkhdr + max_protohdr;
96 max_datalen = MHLEN - max_hdr;
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 */
104 void
105 net_add_domain(void *data)
106 {
107 struct domain *dp;
108
109 dp = (struct domain *)data;
110 mtx_lock(&dom_mtx);
111 dp->dom_next = domains;
112 domains = dp;
113 mtx_unlock(&dom_mtx);
114 net_init_domain(dp);
115 }
116
117 /* ARGSUSED*/
118 static void
119 domaininit(void *dummy)
120 {
121 /*
122 * Before we do any setup, make sure to initialize the
123 * zone allocator we get struct sockets from.
124 */
125
126 socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
127 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
128 uma_zone_set_max(socket_zone, maxsockets);
129
130 if (max_linkhdr < 16) /* XXX */
131 max_linkhdr = 16;
132
133 if (debug_mpsafenet) {
134 callout_init(&pffast_callout, CALLOUT_MPSAFE);
135 callout_init(&pfslow_callout, CALLOUT_MPSAFE);
136 } else {
137 callout_init(&pffast_callout, 0);
138 callout_init(&pfslow_callout, 0);
139 }
140
141 callout_reset(&pffast_callout, 1, pffasttimo, NULL);
142 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
143 }
144
145
146 struct protosw *
147 pffindtype(family, type)
148 int family;
149 int type;
150 {
151 register struct domain *dp;
152 register struct protosw *pr;
153
154 for (dp = domains; dp; dp = dp->dom_next)
155 if (dp->dom_family == family)
156 goto found;
157 return (0);
158 found:
159 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
160 if (pr->pr_type && pr->pr_type == type)
161 return (pr);
162 return (0);
163 }
164
165 struct protosw *
166 pffindproto(family, protocol, type)
167 int family;
168 int protocol;
169 int type;
170 {
171 register struct domain *dp;
172 register struct protosw *pr;
173 struct protosw *maybe = 0;
174
175 if (family == 0)
176 return (0);
177 for (dp = domains; dp; dp = dp->dom_next)
178 if (dp->dom_family == family)
179 goto found;
180 return (0);
181 found:
182 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
183 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
184 return (pr);
185
186 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
187 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
188 maybe = pr;
189 }
190 return (maybe);
191 }
192
193 void
194 pfctlinput(cmd, sa)
195 int cmd;
196 struct sockaddr *sa;
197 {
198 register struct domain *dp;
199 register struct protosw *pr;
200
201 for (dp = domains; dp; dp = dp->dom_next)
202 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
203 if (pr->pr_ctlinput)
204 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
205 }
206
207 void
208 pfctlinput2(cmd, sa, ctlparam)
209 int cmd;
210 struct sockaddr *sa;
211 void *ctlparam;
212 {
213 struct domain *dp;
214 struct protosw *pr;
215
216 if (!sa)
217 return;
218 for (dp = domains; dp; dp = dp->dom_next) {
219 /*
220 * the check must be made by xx_ctlinput() anyways, to
221 * make sure we use data item pointed to by ctlparam in
222 * correct way. the following check is made just for safety.
223 */
224 if (dp->dom_family != sa->sa_family)
225 continue;
226
227 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
228 if (pr->pr_ctlinput)
229 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
230 }
231 }
232
233 static void
234 pfslowtimo(arg)
235 void *arg;
236 {
237 register struct domain *dp;
238 register struct protosw *pr;
239
240 NET_ASSERT_GIANT();
241
242 for (dp = domains; dp; dp = dp->dom_next)
243 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
244 if (pr->pr_slowtimo)
245 (*pr->pr_slowtimo)();
246 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
247 }
248
249 static void
250 pffasttimo(arg)
251 void *arg;
252 {
253 register struct domain *dp;
254 register struct protosw *pr;
255
256 NET_ASSERT_GIANT();
257
258 for (dp = domains; dp; dp = dp->dom_next)
259 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
260 if (pr->pr_fasttimo)
261 (*pr->pr_fasttimo)();
262 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
263 }
Cache object: 39648bc6d44b54dde4ed14329eec2c96
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