4.3BSD-Reno/src/sys/kern/uipc_domain.c

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution is only permitted until one year after the first shipment
 * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
 * binary forms are permitted provided that: (1) source distributions retain
 * this entire copyright notice and comment, and (2) distributions including
 * binaries display the following acknowledgement:  This product includes
 * software developed by the University of California, Berkeley and its
 * contributors'' in the documentation or other materials provided with the
 * distribution and in all advertising materials mentioning features or use
 * of this software.  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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)uipc_domain.c	7.7 (Berkeley) 6/28/90
 */

#include "param.h"
#include "socket.h"
#include "protosw.h"
#include "domain.h"
#include "mbuf.h"
#include "time.h"
#include "kernel.h"

#define	ADDDOMAIN(x)	{ \
	extern struct domain x/**/domain; \
	x/**/domain.dom_next = domains; \
	domains = &x/**/domain; \
}

domaininit()
{
	register struct domain *dp;
	register struct protosw *pr;

#ifndef lint
	ADDDOMAIN(unix);
	ADDDOMAIN(route);
#ifdef INET
	ADDDOMAIN(inet);
#endif
#ifdef NS
	ADDDOMAIN(ns);
#endif
#ifdef ISO
	ADDDOMAIN(iso);
#endif
#ifdef RMP
	ADDDOMAIN(rmp);
#endif
#include "imp.h"
#if NIMP > 0
	ADDDOMAIN(imp);
#endif
#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++)
			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;
	pffasttimo();
	pfslowtimo();
}

struct protosw *
pffindtype(family, type)
	int family, 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(family, protocol, type)
	int family, protocol, 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);
}

pfctlinput(cmd, sa)
	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, (caddr_t) 0);
}

pfslowtimo()
{
	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, (caddr_t)0, hz/2);
}

pffasttimo()
{
	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, (caddr_t)0, hz/5);
}