2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/socket.h>
37 #include <sys/protosw.h>
38 #include <sys/domain.h>
39 #include <sys/eventhandler.h>
41 #include <sys/kernel.h>
43 #include <sys/mutex.h>
44 #include <sys/socketvar.h>
45 #include <sys/systm.h>
52 * System initialization
54 * Note: domain initialization takes place on a per domain basis
55 * as a result of traversing a SYSINIT linker set. Most likely,
56 * each domain would want to call DOMAIN_SET(9) itself, which
57 * would cause the domain to be added just after domaininit()
58 * is called during startup.
60 * See DOMAIN_SET(9) for details on its use.
63 static void domaininit(void *);
64 SYSINIT(domain, SI_SUB_PROTO_DOMAININIT, SI_ORDER_ANY, domaininit, NULL);
66 static void domainfinalize(void *);
67 SYSINIT(domainfin, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, domainfinalize,
70 static struct callout pffast_callout;
71 static struct callout pfslow_callout;
73 static void pffasttimo(void *);
74 static void pfslowtimo(void *);
76 struct domain *domains; /* registered protocol domains */
77 int domain_init_status = 0;
78 static struct mtx dom_mtx; /* domain list lock */
79 MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
82 * Dummy protocol specific user requests function pointer array.
83 * All functions return EOPNOTSUPP.
85 struct pr_usrreqs nousrreqs = {
86 .pru_accept = pru_accept_notsupp,
87 .pru_attach = pru_attach_notsupp,
88 .pru_bind = pru_bind_notsupp,
89 .pru_connect = pru_connect_notsupp,
90 .pru_connect2 = pru_connect2_notsupp,
91 .pru_control = pru_control_notsupp,
92 .pru_disconnect = pru_disconnect_notsupp,
93 .pru_listen = pru_listen_notsupp,
94 .pru_peeraddr = pru_peeraddr_notsupp,
95 .pru_rcvd = pru_rcvd_notsupp,
96 .pru_rcvoob = pru_rcvoob_notsupp,
97 .pru_send = pru_send_notsupp,
98 .pru_sense = pru_sense_null,
99 .pru_shutdown = pru_shutdown_notsupp,
100 .pru_sockaddr = pru_sockaddr_notsupp,
101 .pru_sosend = pru_sosend_notsupp,
102 .pru_soreceive = pru_soreceive_notsupp,
103 .pru_sopoll = pru_sopoll_notsupp,
107 protosw_init(struct protosw *pr)
109 struct pr_usrreqs *pu;
112 KASSERT(pu != NULL, ("protosw_init: %ssw[%d] has no usrreqs!",
113 pr->pr_domain->dom_name,
114 (int)(pr - pr->pr_domain->dom_protosw)));
117 * Protocol switch methods fall into three categories: mandatory,
118 * mandatory but protosw_init() provides a default, and optional.
120 * For true protocols (i.e., pru_attach != NULL), KASSERT truly
121 * mandatory methods with no defaults, and initialize defaults for
122 * other mandatory methods if the protocol hasn't defined an
123 * implementation (NULL function pointer).
126 if (pu->pru_attach != NULL) {
127 KASSERT(pu->pru_abort != NULL,
128 ("protosw_init: %ssw[%d] pru_abort NULL",
129 pr->pr_domain->dom_name,
130 (int)(pr - pr->pr_domain->dom_protosw)));
131 KASSERT(pu->pru_send != NULL,
132 ("protosw_init: %ssw[%d] pru_send NULL",
133 pr->pr_domain->dom_name,
134 (int)(pr - pr->pr_domain->dom_protosw)));
138 #define DEFAULT(foo, bar) if ((foo) == NULL) (foo) = (bar)
139 DEFAULT(pu->pru_accept, pru_accept_notsupp);
140 DEFAULT(pu->pru_bind, pru_bind_notsupp);
141 DEFAULT(pu->pru_connect, pru_connect_notsupp);
142 DEFAULT(pu->pru_connect2, pru_connect2_notsupp);
143 DEFAULT(pu->pru_control, pru_control_notsupp);
144 DEFAULT(pu->pru_disconnect, pru_disconnect_notsupp);
145 DEFAULT(pu->pru_listen, pru_listen_notsupp);
146 DEFAULT(pu->pru_peeraddr, pru_peeraddr_notsupp);
147 DEFAULT(pu->pru_rcvd, pru_rcvd_notsupp);
148 DEFAULT(pu->pru_rcvoob, pru_rcvoob_notsupp);
149 DEFAULT(pu->pru_sense, pru_sense_null);
150 DEFAULT(pu->pru_shutdown, pru_shutdown_notsupp);
151 DEFAULT(pu->pru_sockaddr, pru_sockaddr_notsupp);
152 DEFAULT(pu->pru_sosend, sosend_generic);
153 DEFAULT(pu->pru_soreceive, soreceive_generic);
154 DEFAULT(pu->pru_sopoll, sopoll_generic);
161 * Add a new protocol domain to the list of supported domains
162 * Note: you cant unload it again because a socket may be using it.
163 * XXX can't fail at this time.
166 domain_init(void *arg)
168 struct domain *dp = arg;
173 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
176 * update global information about maximums
178 max_hdr = max_linkhdr + max_protohdr;
179 max_datalen = MHLEN - max_hdr;
181 panic("%s: max_datalen < 1", __func__);
186 vnet_domain_init(void *arg)
189 /* Virtualized case is no different -- call init functions. */
194 vnet_domain_uninit(void *arg)
196 struct domain *dp = arg;
199 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
203 (*dp->dom_destroy)();
208 * Add a new protocol domain to the list of supported domains
209 * Note: you cant unload it again because a socket may be using it.
210 * XXX can't fail at this time.
213 domain_add(void *data)
217 dp = (struct domain *)data;
219 dp->dom_next = domains;
222 KASSERT(domain_init_status >= 1,
223 ("attempt to net_add_domain(%s) before domaininit()",
226 if (domain_init_status < 1)
227 printf("WARNING: attempt to domain_add(%s) before "
228 "domaininit()\n", dp->dom_name);
231 KASSERT(domain_init_status < 2,
232 ("attempt to domain_add(%s) after domainfinalize()",
235 if (domain_init_status >= 2)
236 printf("WARNING: attempt to domain_add(%s) after "
237 "domainfinalize()\n", dp->dom_name);
239 mtx_unlock(&dom_mtx);
243 socket_zone_change(void *tag)
246 uma_zone_set_max(socket_zone, maxsockets);
251 domaininit(void *dummy)
255 * Before we do any setup, make sure to initialize the
256 * zone allocator we get struct sockets from.
258 socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
259 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
260 uma_zone_set_max(socket_zone, maxsockets);
261 EVENTHANDLER_REGISTER(maxsockets_change, socket_zone_change, NULL,
262 EVENTHANDLER_PRI_FIRST);
264 if (max_linkhdr < 16) /* XXX */
267 callout_init(&pffast_callout, CALLOUT_MPSAFE);
268 callout_init(&pfslow_callout, CALLOUT_MPSAFE);
271 KASSERT(domain_init_status == 0, ("domaininit called too late!"));
272 domain_init_status = 1;
273 mtx_unlock(&dom_mtx);
278 domainfinalize(void *dummy)
282 KASSERT(domain_init_status == 1, ("domainfinalize called too late!"));
283 domain_init_status = 2;
284 mtx_unlock(&dom_mtx);
286 callout_reset(&pffast_callout, 1, pffasttimo, NULL);
287 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
291 pffindtype(int family, int type)
296 for (dp = domains; dp; dp = dp->dom_next)
297 if (dp->dom_family == family)
301 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
302 if (pr->pr_type && pr->pr_type == type)
308 pffindproto(int family, int protocol, int type)
312 struct protosw *maybe = 0;
316 for (dp = domains; dp; dp = dp->dom_next)
317 if (dp->dom_family == family)
321 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
322 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
325 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
326 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
333 * The caller must make sure that the new protocol is fully set up and ready to
334 * accept requests before it is registered.
337 pf_proto_register(int family, struct protosw *npr)
339 VNET_ITERATOR_DECL(vnet_iter);
341 struct protosw *pr, *fpr;
345 return (EPFNOSUPPORT);
346 if (npr->pr_type == 0)
348 if (npr->pr_protocol == 0)
349 return (EPROTONOSUPPORT);
350 if (npr->pr_usrreqs == NULL)
353 /* Try to find the specified domain based on the family. */
354 for (dp = domains; dp; dp = dp->dom_next)
355 if (dp->dom_family == family)
357 return (EPFNOSUPPORT);
360 /* Initialize backpointer to struct domain. */
365 * Protect us against races when two protocol registrations for
366 * the same protocol happen at the same time.
370 /* The new protocol must not yet exist. */
371 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
372 if ((pr->pr_type == npr->pr_type) &&
373 (pr->pr_protocol == npr->pr_protocol)) {
374 mtx_unlock(&dom_mtx);
375 return (EEXIST); /* XXX: Check only protocol? */
377 /* While here, remember the first free spacer. */
378 if ((fpr == NULL) && (pr->pr_protocol == PROTO_SPACER))
382 /* If no free spacer is found we can't add the new protocol. */
384 mtx_unlock(&dom_mtx);
388 /* Copy the new struct protosw over the spacer. */
389 bcopy(npr, fpr, sizeof(*fpr));
391 /* Job is done, no more protection required. */
392 mtx_unlock(&dom_mtx);
394 /* Initialize and activate the protocol. */
396 VNET_FOREACH(vnet_iter) {
397 CURVNET_SET_QUIET(vnet_iter);
407 * The caller must make sure the protocol and its functions correctly shut down
408 * all sockets and release all locks and memory references.
411 pf_proto_unregister(int family, int protocol, int type)
414 struct protosw *pr, *dpr;
418 return (EPFNOSUPPORT);
420 return (EPROTONOSUPPORT);
424 /* Try to find the specified domain based on the family type. */
425 for (dp = domains; dp; dp = dp->dom_next)
426 if (dp->dom_family == family)
428 return (EPFNOSUPPORT);
433 /* Lock out everyone else while we are manipulating the protosw. */
436 /* The protocol must exist and only once. */
437 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
438 if ((pr->pr_type == type) && (pr->pr_protocol == protocol)) {
440 mtx_unlock(&dom_mtx);
441 return (EMLINK); /* Should not happen! */
447 /* Protocol does not exist. */
449 mtx_unlock(&dom_mtx);
450 return (EPROTONOSUPPORT);
453 /* De-orbit the protocol and make the slot available again. */
456 dpr->pr_protocol = PROTO_SPACER;
458 dpr->pr_input = NULL;
459 dpr->pr_output = NULL;
460 dpr->pr_ctlinput = NULL;
461 dpr->pr_ctloutput = NULL;
463 dpr->pr_fasttimo = NULL;
464 dpr->pr_slowtimo = NULL;
465 dpr->pr_drain = NULL;
466 dpr->pr_usrreqs = &nousrreqs;
468 /* Job is done, not more protection required. */
469 mtx_unlock(&dom_mtx);
475 pfctlinput(int cmd, struct sockaddr *sa)
480 for (dp = domains; dp; dp = dp->dom_next)
481 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
483 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
487 pfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam)
494 for (dp = domains; dp; dp = dp->dom_next) {
496 * the check must be made by xx_ctlinput() anyways, to
497 * make sure we use data item pointed to by ctlparam in
498 * correct way. the following check is made just for safety.
500 if (dp->dom_family != sa->sa_family)
503 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
505 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
510 pfslowtimo(void *arg)
515 for (dp = domains; dp; dp = dp->dom_next)
516 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
518 (*pr->pr_slowtimo)();
519 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
523 pffasttimo(void *arg)
528 for (dp = domains; dp; dp = dp->dom_next)
529 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
531 (*pr->pr_fasttimo)();
532 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);