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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>
40 #include <sys/kernel.h>
42 #include <sys/mutex.h>
43 #include <sys/socketvar.h>
44 #include <sys/systm.h>
48 * System initialization
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.
56 * See DOMAIN_SET(9) for details on its use.
59 static void domaininit(void *);
60 SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
62 static void domainfinalize(void *);
63 SYSINIT(domainfin, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, domainfinalize,
66 static struct callout pffast_callout;
67 static struct callout pfslow_callout;
69 static void pffasttimo(void *);
70 static void pfslowtimo(void *);
72 struct domain *domains; /* registered protocol domains */
73 int domain_init_status = 0;
74 struct mtx dom_mtx; /* domain list lock */
75 MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
78 * Dummy protocol specific user requests function pointer array.
79 * All functions return EOPNOTSUPP.
81 struct pr_usrreqs nousrreqs = {
82 .pru_abort = pru_abort_notsupp,
83 .pru_accept = pru_accept_notsupp,
84 .pru_attach = pru_attach_notsupp,
85 .pru_bind = pru_bind_notsupp,
86 .pru_connect = pru_connect_notsupp,
87 .pru_connect2 = pru_connect2_notsupp,
88 .pru_control = pru_control_notsupp,
89 .pru_detach = pru_detach_notsupp,
90 .pru_disconnect = pru_disconnect_notsupp,
91 .pru_listen = pru_listen_notsupp,
92 .pru_peeraddr = pru_peeraddr_notsupp,
93 .pru_rcvd = pru_rcvd_notsupp,
94 .pru_rcvoob = pru_rcvoob_notsupp,
95 .pru_send = pru_send_notsupp,
96 .pru_sense = pru_sense_null,
97 .pru_shutdown = pru_shutdown_notsupp,
98 .pru_sockaddr = pru_sockaddr_notsupp,
99 .pru_sosend = pru_sosend_notsupp,
100 .pru_soreceive = pru_soreceive_notsupp,
101 .pru_sopoll = pru_sopoll_notsupp,
102 .pru_sosetlabel = pru_sosetlabel_null
106 protosw_init(struct protosw *pr)
108 struct pr_usrreqs *pu;
111 KASSERT(pu != NULL, ("protosw_init: %ssw[%d] has no usrreqs!",
112 pr->pr_domain->dom_name,
113 (int)(pr - pr->pr_domain->dom_protosw)));
115 #define DEFAULT(foo, bar) if ((foo) == NULL) (foo) = (bar)
116 DEFAULT(pu->pru_accept, pru_accept_notsupp);
117 DEFAULT(pu->pru_connect, pru_connect_notsupp);
118 DEFAULT(pu->pru_connect2, pru_connect2_notsupp);
119 DEFAULT(pu->pru_control, pru_control_notsupp);
120 DEFAULT(pu->pru_listen, pru_listen_notsupp);
121 DEFAULT(pu->pru_rcvd, pru_rcvd_notsupp);
122 DEFAULT(pu->pru_rcvoob, pru_rcvoob_notsupp);
123 DEFAULT(pu->pru_sense, pru_sense_null);
124 DEFAULT(pu->pru_sosend, sosend);
125 DEFAULT(pu->pru_soreceive, soreceive);
126 DEFAULT(pu->pru_sopoll, sopoll);
127 DEFAULT(pu->pru_sosetlabel, pru_sosetlabel_null);
134 * Add a new protocol domain to the list of supported domains
135 * Note: you cant unload it again because a socket may be using it.
136 * XXX can't fail at this time.
139 net_init_domain(struct domain *dp)
145 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
148 * update global information about maximums
150 max_hdr = max_linkhdr + max_protohdr;
151 max_datalen = MHLEN - max_hdr;
155 * Add a new protocol domain to the list of supported domains
156 * Note: you cant unload it again because a socket may be using it.
157 * XXX can't fail at this time.
160 net_add_domain(void *data)
164 dp = (struct domain *)data;
166 dp->dom_next = domains;
169 KASSERT(domain_init_status >= 1,
170 ("attempt to net_add_domain(%s) before domaininit()",
173 if (domain_init_status < 1)
174 printf("WARNING: attempt to net_add_domain(%s) before "
175 "domaininit()\n", dp->dom_name);
178 KASSERT(domain_init_status < 2,
179 ("attempt to net_add_domain(%s) after domainfinalize()",
182 if (domain_init_status >= 2)
183 printf("WARNING: attempt to net_add_domain(%s) after "
184 "domainfinalize()\n", dp->dom_name);
186 mtx_unlock(&dom_mtx);
192 domaininit(void *dummy)
195 * Before we do any setup, make sure to initialize the
196 * zone allocator we get struct sockets from.
199 socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
200 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
201 uma_zone_set_max(socket_zone, maxsockets);
203 if (max_linkhdr < 16) /* XXX */
206 if (debug_mpsafenet) {
207 callout_init(&pffast_callout, CALLOUT_MPSAFE);
208 callout_init(&pfslow_callout, CALLOUT_MPSAFE);
210 callout_init(&pffast_callout, 0);
211 callout_init(&pfslow_callout, 0);
215 KASSERT(domain_init_status == 0, ("domaininit called too late!"));
216 domain_init_status = 1;
217 mtx_unlock(&dom_mtx);
222 domainfinalize(void *dummy)
225 KASSERT(domain_init_status == 1, ("domainfinalize called too late!"));
226 domain_init_status = 2;
227 mtx_unlock(&dom_mtx);
229 callout_reset(&pffast_callout, 1, pffasttimo, NULL);
230 callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
234 pffindtype(family, type)
238 register struct domain *dp;
239 register struct protosw *pr;
241 for (dp = domains; dp; dp = dp->dom_next)
242 if (dp->dom_family == family)
246 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
247 if (pr->pr_type && pr->pr_type == type)
253 pffindproto(family, protocol, type)
258 register struct domain *dp;
259 register struct protosw *pr;
260 struct protosw *maybe = 0;
264 for (dp = domains; dp; dp = dp->dom_next)
265 if (dp->dom_family == family)
269 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
270 if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
273 if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
274 pr->pr_protocol == 0 && maybe == (struct protosw *)0)
281 * The caller must make sure that the new protocol is fully set up and ready to
282 * accept requests before it is registered.
285 pf_proto_register(family, npr)
290 struct protosw *pr, *fpr;
294 return (EPFNOSUPPORT);
295 if (npr->pr_type == 0)
297 if (npr->pr_protocol == 0)
298 return (EPROTONOSUPPORT);
299 if (npr->pr_usrreqs == NULL)
302 /* Try to find the specified domain based on the family. */
303 for (dp = domains; dp; dp = dp->dom_next)
304 if (dp->dom_family == family)
306 return (EPFNOSUPPORT);
309 /* Initialize backpointer to struct domain. */
314 * Protect us against races when two protocol registrations for
315 * the same protocol happen at the same time.
319 /* The new protocol must not yet exist. */
320 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
321 if ((pr->pr_type == npr->pr_type) &&
322 (pr->pr_protocol == npr->pr_protocol)) {
324 return (EEXIST); /* XXX: Check only protocol? */
326 /* While here, remember the first free spacer. */
327 if ((fpr == NULL) && (pr->pr_protocol == PROTO_SPACER))
331 /* If no free spacer is found we can't add the new protocol. */
337 /* Copy the new struct protosw over the spacer. */
338 bcopy(npr, fpr, sizeof(*fpr));
340 /* Job is done, no more protection required. */
343 /* Initialize and activate the protocol. */
350 * The caller must make sure the protocol and its functions correctly shut down
351 * all sockets and release all locks and memory references.
354 pf_proto_unregister(family, protocol, type)
360 struct protosw *pr, *dpr;
364 return (EPFNOSUPPORT);
366 return (EPROTONOSUPPORT);
370 /* Try to find the specified domain based on the family type. */
371 for (dp = domains; dp; dp = dp->dom_next)
372 if (dp->dom_family == family)
374 return (EPFNOSUPPORT);
379 /* Lock out everyone else while we are manipulating the protosw. */
382 /* The protocol must exist and only once. */
383 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
384 if ((pr->pr_type == type) && (pr->pr_protocol == protocol)) {
387 return (EMLINK); /* Should not happen! */
393 /* Protocol does not exist. */
396 return (EPROTONOSUPPORT);
399 /* De-orbit the protocol and make the slot available again. */
402 dpr->pr_protocol = PROTO_SPACER;
404 dpr->pr_input = NULL;
405 dpr->pr_output = NULL;
406 dpr->pr_ctlinput = NULL;
407 dpr->pr_ctloutput = NULL;
408 dpr->pr_ousrreq = NULL;
410 dpr->pr_fasttimo = NULL;
411 dpr->pr_slowtimo = NULL;
412 dpr->pr_drain = NULL;
413 dpr->pr_usrreqs = &nousrreqs;
415 /* Job is done, not more protection required. */
426 register struct domain *dp;
427 register struct protosw *pr;
429 for (dp = domains; dp; dp = dp->dom_next)
430 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
432 (*pr->pr_ctlinput)(cmd, sa, (void *)0);
436 pfctlinput2(cmd, sa, ctlparam)
446 for (dp = domains; dp; dp = dp->dom_next) {
448 * the check must be made by xx_ctlinput() anyways, to
449 * make sure we use data item pointed to by ctlparam in
450 * correct way. the following check is made just for safety.
452 if (dp->dom_family != sa->sa_family)
455 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
457 (*pr->pr_ctlinput)(cmd, sa, ctlparam);
465 register struct domain *dp;
466 register struct protosw *pr;
470 for (dp = domains; dp; dp = dp->dom_next)
471 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
473 (*pr->pr_slowtimo)();
474 callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
481 register struct domain *dp;
482 register struct protosw *pr;
486 for (dp = domains; dp; dp = dp->dom_next)
487 for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
489 (*pr->pr_fasttimo)();
490 callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);