263 lines
7.1 KiB
C
263 lines
7.1 KiB
C
/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uipc_domain.c 8.2 (Berkeley) 10/18/93
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/protosw.h>
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#include <sys/domain.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socketvar.h>
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#include <sys/systm.h>
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#include <vm/vm_zone.h>
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/*
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* System initialization
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*
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* Note: domain initialization takes place on a per domain basis
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* as a result of traversing a SYSINIT linker set. Most likely,
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* each domain would want to call DOMAIN_SET(9) itself, which
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* would cause the domain to be added just after domaininit()
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* is called during startup.
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*
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* See DOMAIN_SET(9) for details on its use.
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*/
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static void domaininit __P((void *));
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SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
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static struct callout pffast_callout;
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static struct callout pfslow_callout;
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static void pffasttimo __P((void *));
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static void pfslowtimo __P((void *));
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struct domain *domains;
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/*
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* Add a new protocol domain to the list of supported domains
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* Note: you cant unload it again because a socket may be using it.
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* XXX can't fail at this time.
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*/
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static void
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net_init_domain(struct domain *dp)
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{
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register struct protosw *pr;
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int s;
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s = splnet();
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if (dp->dom_init)
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(*dp->dom_init)();
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
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if (pr->pr_usrreqs == 0)
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panic("domaininit: %ssw[%d] has no usrreqs!",
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dp->dom_name,
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(int)(pr - dp->dom_protosw));
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if (pr->pr_init)
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(*pr->pr_init)();
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}
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/*
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* update global informatio about maximums
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*/
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max_hdr = max_linkhdr + max_protohdr;
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max_datalen = MHLEN - max_hdr;
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splx(s);
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}
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/*
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* Add a new protocol domain to the list of supported domains
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* Note: you cant unload it again because a socket may be using it.
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* XXX can't fail at this time.
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*/
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void
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net_add_domain(void *data)
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{
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int s;
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struct domain *dp;
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dp = (struct domain *)data;
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s = splnet();
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dp->dom_next = domains;
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domains = dp;
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splx(s);
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net_init_domain(dp);
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}
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/* ARGSUSED*/
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static void
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domaininit(void *dummy)
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{
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/*
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* Before we do any setup, make sure to initialize the
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* zone allocator we get struct sockets from. The obvious
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* maximum number of sockets is `maxfiles', but it is possible
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* to have a socket without an open file (e.g., a connection waiting
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* to be accept(2)ed). Rather than think up and define a
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* better value, we just use nmbclusters, since that's what people
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* are told to increase first when the network runs out of memory.
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* Perhaps we should have two pools, one of unlimited size
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* for use during socreate(), and one ZONE_INTERRUPT pool for
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* use in sonewconn().
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*/
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socket_zone = zinit("socket", sizeof(struct socket), maxsockets,
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ZONE_INTERRUPT, 0);
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if (max_linkhdr < 16) /* XXX */
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max_linkhdr = 16;
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callout_init(&pffast_callout, 0);
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callout_init(&pfslow_callout, 0);
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callout_reset(&pffast_callout, 1, pffasttimo, NULL);
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callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
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}
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struct protosw *
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pffindtype(family, type)
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int family;
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int type;
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{
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register struct domain *dp;
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register struct protosw *pr;
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for (dp = domains; dp; dp = dp->dom_next)
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if (dp->dom_family == family)
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goto found;
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return (0);
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found:
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
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if (pr->pr_type && pr->pr_type == type)
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return (pr);
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return (0);
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}
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struct protosw *
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pffindproto(family, protocol, type)
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int family;
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int protocol;
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int type;
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{
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register struct domain *dp;
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register struct protosw *pr;
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struct protosw *maybe = 0;
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if (family == 0)
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return (0);
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for (dp = domains; dp; dp = dp->dom_next)
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if (dp->dom_family == family)
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goto found;
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return (0);
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found:
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
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if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
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return (pr);
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if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
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pr->pr_protocol == 0 && maybe == (struct protosw *)0)
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maybe = pr;
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}
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return (maybe);
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}
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void
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pfctlinput(cmd, sa)
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int cmd;
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struct sockaddr *sa;
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{
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register struct domain *dp;
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register struct protosw *pr;
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for (dp = domains; dp; dp = dp->dom_next)
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
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if (pr->pr_ctlinput)
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(*pr->pr_ctlinput)(cmd, sa, (void *)0);
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}
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void
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pfctlinput2(cmd, sa, ctlparam)
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int cmd;
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struct sockaddr *sa;
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void *ctlparam;
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{
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struct domain *dp;
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struct protosw *pr;
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if (!sa)
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return;
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for (dp = domains; dp; dp = dp->dom_next) {
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/*
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* the check must be made by xx_ctlinput() anyways, to
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* make sure we use data item pointed to by ctlparam in
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* correct way. the following check is made just for safety.
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*/
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if (dp->dom_family != sa->sa_family)
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continue;
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
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if (pr->pr_ctlinput)
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(*pr->pr_ctlinput)(cmd, sa, ctlparam);
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}
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}
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static void
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pfslowtimo(arg)
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void *arg;
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{
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register struct domain *dp;
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register struct protosw *pr;
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for (dp = domains; dp; dp = dp->dom_next)
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
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if (pr->pr_slowtimo)
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(*pr->pr_slowtimo)();
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callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
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}
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static void
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pffasttimo(arg)
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void *arg;
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{
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register struct domain *dp;
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register struct protosw *pr;
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for (dp = domains; dp; dp = dp->dom_next)
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
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if (pr->pr_fasttimo)
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(*pr->pr_fasttimo)();
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callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
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}
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