source: rtems/cpukit/libnetworking/kern/uipc_domain.c @ 9b4422a2

/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. 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
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/systm.h>

/*
 * 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_DOMAI, 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.
 */

#if !defined(__rtems__)
static int      x_save_spl;                     /* used by kludge*/
static void kludge_splimp(void *);
static void kludge_splx(void *);
       void domaininit(void *);
SYSINIT(splimp, SI_SUB_PROTO_BEGIN, SI_ORDER_FIRST, kludge_splimp, &x_save_spl)
SYSINIT(domain, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, domaininit, NULL)
SYSINIT(splx, SI_SUB_PROTO_END, SI_ORDER_FIRST, kludge_splx, &x_save_spl)
#endif

static void     pffasttimo(void *);
static void     pfslowtimo(void *);

struct domain *domains;

#define ADDDOMAIN(x)    { \
        __CONCAT(x,domain.dom_next) = domains; \
        domains = &__CONCAT(x,domain); \
}

/* ARGSUSED*/
void
domaininit(void *dummy)
{
        register struct domain *dp;
        register struct protosw *pr;

/* - not in our sources
#ifdef ISDN
        ADDDOMAIN(isdn);
#endif
*/

        for (dp = domains; dp; dp = dp->dom_next) {
                if (dp->dom_init)
                        (*dp->dom_init)();
                for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++){
#ifdef PRU_OLDSTYLE
                        /* See comments in uipc_socket2.c. */
                        if (pr->pr_usrreqs == 0 && pr->pr_ousrreq)
                                pr->pr_usrreqs = &pru_oldstyle;
#endif
                        if (pr->pr_init)
                                (*pr->pr_init)();
                }
        }

        if (max_linkhdr < 16)           /* XXX */
                max_linkhdr = 16;
        max_hdr = max_linkhdr + max_protohdr;
        max_datalen = MHLEN - max_hdr;
        timeout(pffasttimo, (void *)0, 1);
        timeout(pfslowtimo, (void *)0, 1);
}


#if !defined(__rtems__)
/*
 * The following two operations are kludge code.  Most likely, they should
 * be done as a "domainpreinit()" for the first function and then rolled
 * in as the last act of "domaininit()" for the second.
 *
 * In point of fact, it is questionable why other initialization prior
 * to this does not also take place at splimp by default.
 */
static void
kludge_splimp(void *udata)
{
        int     *savesplp = udata;

        *savesplp = splimp();
}

static void
kludge_splx(void *udata)
{
        int     *savesplp = udata;

        splx( *savesplp);
}
#endif /* !defined(__rtems__) */

struct protosw *
pffindtype(int family, int type)
{
        register struct domain *dp;
        register struct protosw *pr;

        for (dp = domains; dp; dp = dp->dom_next)
                if (dp->dom_family == family)
                        goto found;
        return (0);
found:
        for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
                if (pr->pr_type && pr->pr_type == type)
                        return (pr);
        return (0);
}

struct protosw *
pffindproto(int family, int protocol, int type)
{
        register struct domain *dp;
        register struct protosw *pr;
        struct protosw *maybe = 0;

        if (family == 0)
                return (0);
        for (dp = domains; dp; dp = dp->dom_next)
                if (dp->dom_family == family)
                        goto found;
        return (0);
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 == (struct protosw *)0)
                        maybe = pr;
        }
        return (maybe);
}

void
pfctlinput(int cmd, struct sockaddr *sa)
{
        register struct domain *dp;
        register struct protosw *pr;

        for (dp = domains; dp; dp = dp->dom_next)
                for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
                        if (pr->pr_ctlinput)
                                (*pr->pr_ctlinput)(cmd, sa, (void *)0);
}

static void
pfslowtimo(void *arg)
{
        register struct domain *dp;
        register struct protosw *pr;

        for (dp = domains; dp; dp = dp->dom_next)
                for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
                        if (pr->pr_slowtimo)
                                (*pr->pr_slowtimo)();
        timeout(pfslowtimo, (void *)0, hz/2);
}

static void
pffasttimo(void *arg)
{
        register struct domain *dp;
        register struct protosw *pr;

        for (dp = domains; dp; dp = dp->dom_next)
                for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
                        if (pr->pr_fasttimo)
                                (*pr->pr_fasttimo)();
        timeout(pffasttimo, (void *)0, hz/5);
}