/* * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93 * $FreeBSD: src/sys/kern/uipc_domain.c,v 1.22.2.1 2001/07/03 11:01:37 ume Exp $ */ #include #include #include #include #include #include #include #include #include #include #include /* * System initialization * * Note: domain initialization wants to take place on a per domain basis * as a result of traversing a linker set. Most likely, each domain * want to call a registration function rather than being handled here * in domaininit(). Probably this will look like: * * SYSINIT(unique, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY, domain_add, xxx); * * Where 'xxx' is replaced by the address of a parameter struct to be * passed to the doamin_add() function. */ static void domaininit (void *); SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL); struct domainlist domains; /* * Add a new protocol domain to the list of supported domains * Note: you cant unload it again because a socket may be using it. * XXX can't fail at this time. */ #define PR_NOTSUPP(pr, label) \ if (pr->pr_ ## label == NULL) \ pr->pr_ ## label = pr_generic_notsupp; #define PRU_NOTSUPP(pu, label) \ if (pu->pru_ ## label == NULL) \ pu->pru_ ## label = pr_generic_notsupp; static void net_init_domain(struct domain *dp) { struct protosw *pr; struct pr_usrreqs *pu; crit_enter(); if (dp->dom_init) (*dp->dom_init)(); for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { pu = pr->pr_usrreqs; if (pu == NULL) { panic("domaininit: %ssw[%ld] has no usrreqs!", dp->dom_name, (long)(pr - dp->dom_protosw)); } PR_NOTSUPP(pr, ctloutput); PRU_NOTSUPP(pu, accept); PRU_NOTSUPP(pu, bind); PRU_NOTSUPP(pu, connect); PRU_NOTSUPP(pu, connect2); PRU_NOTSUPP(pu, control); PRU_NOTSUPP(pu, disconnect); PRU_NOTSUPP(pu, listen); PRU_NOTSUPP(pu, peeraddr); PRU_NOTSUPP(pu, rcvd); PRU_NOTSUPP(pu, rcvoob); PRU_NOTSUPP(pu, shutdown); PRU_NOTSUPP(pu, sockaddr); if (pu->pru_sense == NULL) pu->pru_sense = pru_sense_null; if (pu->pru_sosend == NULL) pu->pru_sosend = pru_sosend_notsupp; if (pu->pru_soreceive == NULL) pu->pru_soreceive = pru_soreceive_notsupp; if (pr->pr_init) (*pr->pr_init)(); } /* * update global information about maximums */ max_hdr = max_linkhdr + max_protohdr; max_datalen = MHLEN - max_hdr; crit_exit(); } /* * Add a new protocol domain to the list of supported domains * Note: you cant unload it again because a socket may be using it. * XXX can't fail at this time. */ void net_add_domain(void *data) { struct domain *dp = data; crit_enter(); SLIST_INSERT_HEAD(&domains, dp, dom_next); crit_exit(); net_init_domain(dp); } /* ARGSUSED*/ static void domaininit(void *dummy) { if (max_linkhdr < 20) /* XXX */ max_linkhdr = 20; } struct protosw * pffindtype(int family, int type) { struct domain *dp; struct protosw *pr; SLIST_FOREACH(dp, &domains, dom_next) if (dp->dom_family == family) goto found; return (NULL); found: for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) if (pr->pr_type && pr->pr_type == type) return (pr); return (NULL); } struct protosw * pffindproto(int family, int protocol, int type) { struct domain *dp; struct protosw *pr; struct protosw *maybe = NULL; if (family == 0) return (NULL); SLIST_FOREACH(dp, &domains, dom_next) if (dp->dom_family == family) goto found; return (NULL); found: for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) { if ((pr->pr_protocol == protocol) && (pr->pr_type == type)) return (pr); if (type == SOCK_RAW && pr->pr_type == SOCK_RAW && pr->pr_protocol == 0 && maybe == NULL) maybe = pr; } return (maybe); } void kpfctlinput(int cmd, struct sockaddr *sa) { struct domain *dp; struct protosw *pr; SLIST_FOREACH(dp, &domains, dom_next) { for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) so_pr_ctlinput(pr, cmd, sa, NULL); } } void kpfctlinput_direct(int cmd, struct sockaddr *sa) { struct domain *dp; struct protosw *pr; SLIST_FOREACH(dp, &domains, dom_next) { for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) so_pr_ctlinput_direct(pr, cmd, sa, NULL); } } void kpfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam) { struct domain *dp; struct protosw *pr; if (!sa) return; SLIST_FOREACH(dp, &domains, dom_next) { /* * the check must be made by xx_ctlinput() anyways, to * make sure we use data item pointed to by ctlparam in * correct way. the following check is made just for safety. */ if (dp->dom_family != sa->sa_family) continue; for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) so_pr_ctlinput(pr, cmd, sa, ctlparam); } }