Index: Makefile
===================================================================
--- Makefile	(revision 5ad09a161d646b68cb249d064ac618dcbb41a899)
+++ Makefile	(revision 471e6f920618a40aac2ca27c6e2091f740241ee5)
@@ -284,4 +284,5 @@
 	freebsd/kern/uipc_socket.c \
 	freebsd/kern/uipc_sockbuf.c \
+	freebsd/kern/uipc_domain.c \
 	freebsd/dev/usb/usb_busdma.c \
 	freebsd/dev/usb/usb_core.c \
Index: freebsd-to-rtems.py
===================================================================
--- freebsd-to-rtems.py	(revision 5ad09a161d646b68cb249d064ac618dcbb41a899)
+++ freebsd-to-rtems.py	(revision 471e6f920618a40aac2ca27c6e2091f740241ee5)
@@ -1050,5 +1050,5 @@
 		'kern/uipc_socket.c',
 		'kern/uipc_sockbuf.c',
-		#'kern/uipc_domain.c',
+		'kern/uipc_domain.c',
 		#'kern/uipc_syscalls.c',
 		#'vm/uma_core.c',
Index: freebsd/kern/uipc_domain.c
===================================================================
--- freebsd/kern/uipc_domain.c	(revision 471e6f920618a40aac2ca27c6e2091f740241ee5)
+++ freebsd/kern/uipc_domain.c	(revision 471e6f920618a40aac2ca27c6e2091f740241ee5)
@@ -0,0 +1,535 @@
+#include <freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * 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.
+ * 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 <freebsd/sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <freebsd/sys/param.h>
+#include <freebsd/sys/socket.h>
+#include <freebsd/sys/protosw.h>
+#include <freebsd/sys/domain.h>
+#include <freebsd/sys/eventhandler.h>
+#include <freebsd/sys/mbuf.h>
+#include <freebsd/sys/kernel.h>
+#include <freebsd/sys/lock.h>
+#include <freebsd/sys/mutex.h>
+#include <freebsd/sys/socketvar.h>
+#include <freebsd/sys/systm.h>
+
+#include <freebsd/net/vnet.h>
+
+#include <freebsd/vm/uma.h>
+
+/*
+ * System initialization
+ *
+ * Note: domain initialization takes place on a per domain basis
+ * as a result of traversing a SYSINIT linker set.  Most likely,
+ * each domain would want to call DOMAIN_SET(9) itself, which
+ * would cause the domain to be added just after domaininit()
+ * is called during startup.
+ *
+ * See DOMAIN_SET(9) for details on its use.
+ */
+
+static void domaininit(void *);
+SYSINIT(domain, SI_SUB_PROTO_DOMAININIT, SI_ORDER_ANY, domaininit, NULL);
+
+static void domainfinalize(void *);
+SYSINIT(domainfin, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, domainfinalize,
+    NULL);
+
+static struct callout pffast_callout;
+static struct callout pfslow_callout;
+
+static void	pffasttimo(void *);
+static void	pfslowtimo(void *);
+
+struct domain *domains;		/* registered protocol domains */
+int domain_init_status = 0;
+static struct mtx dom_mtx;		/* domain list lock */
+MTX_SYSINIT(domain, &dom_mtx, "domain list", MTX_DEF);
+
+/*
+ * Dummy protocol specific user requests function pointer array.
+ * All functions return EOPNOTSUPP.
+ */
+struct pr_usrreqs nousrreqs = {
+	.pru_accept =		pru_accept_notsupp,
+	.pru_attach =		pru_attach_notsupp,
+	.pru_bind =		pru_bind_notsupp,
+	.pru_connect =		pru_connect_notsupp,
+	.pru_connect2 =		pru_connect2_notsupp,
+	.pru_control =		pru_control_notsupp,
+	.pru_disconnect	=	pru_disconnect_notsupp,
+	.pru_listen =		pru_listen_notsupp,
+	.pru_peeraddr =		pru_peeraddr_notsupp,
+	.pru_rcvd =		pru_rcvd_notsupp,
+	.pru_rcvoob =		pru_rcvoob_notsupp,
+	.pru_send =		pru_send_notsupp,
+	.pru_sense =		pru_sense_null,
+	.pru_shutdown =		pru_shutdown_notsupp,
+	.pru_sockaddr =		pru_sockaddr_notsupp,
+	.pru_sosend =		pru_sosend_notsupp,
+	.pru_soreceive =	pru_soreceive_notsupp,
+	.pru_sopoll =		pru_sopoll_notsupp,
+};
+
+static void
+protosw_init(struct protosw *pr)
+{
+	struct pr_usrreqs *pu;
+
+	pu = pr->pr_usrreqs;
+	KASSERT(pu != NULL, ("protosw_init: %ssw[%d] has no usrreqs!",
+	    pr->pr_domain->dom_name,
+	    (int)(pr - pr->pr_domain->dom_protosw)));
+
+	/*
+	 * Protocol switch methods fall into three categories: mandatory,
+	 * mandatory but protosw_init() provides a default, and optional.
+	 *
+	 * For true protocols (i.e., pru_attach != NULL), KASSERT truly
+	 * mandatory methods with no defaults, and initialize defaults for
+	 * other mandatory methods if the protocol hasn't defined an
+	 * implementation (NULL function pointer).
+	 */
+#if 0
+	if (pu->pru_attach != NULL) {
+		KASSERT(pu->pru_abort != NULL,
+		    ("protosw_init: %ssw[%d] pru_abort NULL",
+		    pr->pr_domain->dom_name,
+		    (int)(pr - pr->pr_domain->dom_protosw)));
+		KASSERT(pu->pru_send != NULL,
+		    ("protosw_init: %ssw[%d] pru_send NULL",
+		    pr->pr_domain->dom_name,
+		    (int)(pr - pr->pr_domain->dom_protosw)));
+	}
+#endif
+
+#define DEFAULT(foo, bar)	if ((foo) == NULL)  (foo) = (bar)
+	DEFAULT(pu->pru_accept, pru_accept_notsupp);
+	DEFAULT(pu->pru_bind, pru_bind_notsupp);
+	DEFAULT(pu->pru_connect, pru_connect_notsupp);
+	DEFAULT(pu->pru_connect2, pru_connect2_notsupp);
+	DEFAULT(pu->pru_control, pru_control_notsupp);
+	DEFAULT(pu->pru_disconnect, pru_disconnect_notsupp);
+	DEFAULT(pu->pru_listen, pru_listen_notsupp);
+	DEFAULT(pu->pru_peeraddr, pru_peeraddr_notsupp);
+	DEFAULT(pu->pru_rcvd, pru_rcvd_notsupp);
+	DEFAULT(pu->pru_rcvoob, pru_rcvoob_notsupp);
+	DEFAULT(pu->pru_sense, pru_sense_null);
+	DEFAULT(pu->pru_shutdown, pru_shutdown_notsupp);
+	DEFAULT(pu->pru_sockaddr, pru_sockaddr_notsupp);
+	DEFAULT(pu->pru_sosend, sosend_generic);
+	DEFAULT(pu->pru_soreceive, soreceive_generic);
+	DEFAULT(pu->pru_sopoll, sopoll_generic);
+#undef DEFAULT
+	if (pr->pr_init)
+		(*pr->pr_init)();
+}
+
+/*
+ * 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
+domain_init(void *arg)
+{
+	struct domain *dp = arg;
+	struct protosw *pr;
+
+	if (dp->dom_init)
+		(*dp->dom_init)();
+	for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
+		protosw_init(pr);
+	/*
+	 * update global information about maximums
+	 */
+	max_hdr = max_linkhdr + max_protohdr;
+	max_datalen = MHLEN - max_hdr;
+	if (max_datalen < 1)
+		panic("%s: max_datalen < 1", __func__);
+}
+
+#ifdef VIMAGE
+void
+vnet_domain_init(void *arg)
+{
+
+	/* Virtualized case is no different -- call init functions. */
+	domain_init(arg);
+}
+
+void
+vnet_domain_uninit(void *arg)
+{
+	struct domain *dp = arg;
+	struct protosw *pr;
+
+	for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
+		if (pr->pr_destroy)
+			(*pr->pr_destroy)();
+	if (dp->dom_destroy)
+		(*dp->dom_destroy)();
+}
+#endif
+
+/*
+ * 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
+domain_add(void *data)
+{
+	struct domain *dp;
+
+	dp = (struct domain *)data;
+	mtx_lock(&dom_mtx);
+	dp->dom_next = domains;
+	domains = dp;
+
+	KASSERT(domain_init_status >= 1,
+	    ("attempt to net_add_domain(%s) before domaininit()",
+	    dp->dom_name));
+#ifndef INVARIANTS
+	if (domain_init_status < 1)
+		printf("WARNING: attempt to domain_add(%s) before "
+		    "domaininit()\n", dp->dom_name);
+#endif
+#ifdef notyet
+	KASSERT(domain_init_status < 2,
+	    ("attempt to domain_add(%s) after domainfinalize()",
+	    dp->dom_name));
+#else
+	if (domain_init_status >= 2)
+		printf("WARNING: attempt to domain_add(%s) after "
+		    "domainfinalize()\n", dp->dom_name);
+#endif
+	mtx_unlock(&dom_mtx);
+}
+
+static void
+socket_zone_change(void *tag)
+{
+
+	uma_zone_set_max(socket_zone, maxsockets);
+}
+
+/* ARGSUSED*/
+static void
+domaininit(void *dummy)
+{
+
+	/*
+	 * Before we do any setup, make sure to initialize the
+	 * zone allocator we get struct sockets from.
+	 */
+	socket_zone = uma_zcreate("socket", sizeof(struct socket), NULL, NULL,
+	    NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
+	uma_zone_set_max(socket_zone, maxsockets);
+	EVENTHANDLER_REGISTER(maxsockets_change, socket_zone_change, NULL,
+		EVENTHANDLER_PRI_FIRST);
+
+	if (max_linkhdr < 16)		/* XXX */
+		max_linkhdr = 16;
+
+	callout_init(&pffast_callout, CALLOUT_MPSAFE);
+	callout_init(&pfslow_callout, CALLOUT_MPSAFE);
+
+	mtx_lock(&dom_mtx);
+	KASSERT(domain_init_status == 0, ("domaininit called too late!"));
+	domain_init_status = 1;
+	mtx_unlock(&dom_mtx);
+}
+
+/* ARGSUSED*/
+static void
+domainfinalize(void *dummy)
+{
+
+	mtx_lock(&dom_mtx);
+	KASSERT(domain_init_status == 1, ("domainfinalize called too late!"));
+	domain_init_status = 2;
+	mtx_unlock(&dom_mtx);	
+
+	callout_reset(&pffast_callout, 1, pffasttimo, NULL);
+	callout_reset(&pfslow_callout, 1, pfslowtimo, NULL);
+}
+
+struct protosw *
+pffindtype(int family, int type)
+{
+	struct domain *dp;
+	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)
+{
+	struct domain *dp;
+	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);
+}
+
+/*
+ * The caller must make sure that the new protocol is fully set up and ready to
+ * accept requests before it is registered.
+ */
+int
+pf_proto_register(int family, struct protosw *npr)
+{
+	VNET_ITERATOR_DECL(vnet_iter);
+	struct domain *dp;
+	struct protosw *pr, *fpr;
+
+	/* Sanity checks. */
+	if (family == 0)
+		return (EPFNOSUPPORT);
+	if (npr->pr_type == 0)
+		return (EPROTOTYPE);
+	if (npr->pr_protocol == 0)
+		return (EPROTONOSUPPORT);
+	if (npr->pr_usrreqs == NULL)
+		return (ENXIO);
+
+	/* Try to find the specified domain based on the family. */
+	for (dp = domains; dp; dp = dp->dom_next)
+		if (dp->dom_family == family)
+			goto found;
+	return (EPFNOSUPPORT);
+
+found:
+	/* Initialize backpointer to struct domain. */
+	npr->pr_domain = dp;
+	fpr = NULL;
+
+	/*
+	 * Protect us against races when two protocol registrations for
+	 * the same protocol happen at the same time.
+	 */
+	mtx_lock(&dom_mtx);
+
+	/* The new protocol must not yet exist. */
+	for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
+		if ((pr->pr_type == npr->pr_type) &&
+		    (pr->pr_protocol == npr->pr_protocol)) {
+			mtx_unlock(&dom_mtx);
+			return (EEXIST);	/* XXX: Check only protocol? */
+		}
+		/* While here, remember the first free spacer. */
+		if ((fpr == NULL) && (pr->pr_protocol == PROTO_SPACER))
+			fpr = pr;
+	}
+
+	/* If no free spacer is found we can't add the new protocol. */
+	if (fpr == NULL) {
+		mtx_unlock(&dom_mtx);
+		return (ENOMEM);
+	}
+
+	/* Copy the new struct protosw over the spacer. */
+	bcopy(npr, fpr, sizeof(*fpr));
+
+	/* Job is done, no more protection required. */
+	mtx_unlock(&dom_mtx);
+
+	/* Initialize and activate the protocol. */
+	VNET_LIST_RLOCK();
+	VNET_FOREACH(vnet_iter) {
+		CURVNET_SET_QUIET(vnet_iter);
+		protosw_init(fpr);
+		CURVNET_RESTORE();
+	}
+	VNET_LIST_RUNLOCK();
+
+	return (0);
+}
+
+/*
+ * The caller must make sure the protocol and its functions correctly shut down
+ * all sockets and release all locks and memory references.
+ */
+int
+pf_proto_unregister(int family, int protocol, int type)
+{
+	struct domain *dp;
+	struct protosw *pr, *dpr;
+
+	/* Sanity checks. */
+	if (family == 0)
+		return (EPFNOSUPPORT);
+	if (protocol == 0)
+		return (EPROTONOSUPPORT);
+	if (type == 0)
+		return (EPROTOTYPE);
+
+	/* Try to find the specified domain based on the family type. */
+	for (dp = domains; dp; dp = dp->dom_next)
+		if (dp->dom_family == family)
+			goto found;
+	return (EPFNOSUPPORT);
+
+found:
+	dpr = NULL;
+
+	/* Lock out everyone else while we are manipulating the protosw. */
+	mtx_lock(&dom_mtx);
+
+	/* The protocol must exist and only once. */
+	for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
+		if ((pr->pr_type == type) && (pr->pr_protocol == protocol)) {
+			if (dpr != NULL) {
+				mtx_unlock(&dom_mtx);
+				return (EMLINK);   /* Should not happen! */
+			} else
+				dpr = pr;
+		}
+	}
+
+	/* Protocol does not exist. */
+	if (dpr == NULL) {
+		mtx_unlock(&dom_mtx);
+		return (EPROTONOSUPPORT);
+	}
+
+	/* De-orbit the protocol and make the slot available again. */
+	dpr->pr_type = 0;
+	dpr->pr_domain = dp;
+	dpr->pr_protocol = PROTO_SPACER;
+	dpr->pr_flags = 0;
+	dpr->pr_input = NULL;
+	dpr->pr_output = NULL;
+	dpr->pr_ctlinput = NULL;
+	dpr->pr_ctloutput = NULL;
+	dpr->pr_init = NULL;
+	dpr->pr_fasttimo = NULL;
+	dpr->pr_slowtimo = NULL;
+	dpr->pr_drain = NULL;
+	dpr->pr_usrreqs = &nousrreqs;
+
+	/* Job is done, not more protection required. */
+	mtx_unlock(&dom_mtx);
+
+	return (0);
+}
+
+void
+pfctlinput(int cmd, struct sockaddr *sa)
+{
+	struct domain *dp;
+	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);
+}
+
+void
+pfctlinput2(int cmd, struct sockaddr *sa, void *ctlparam)
+{
+	struct domain *dp;
+	struct protosw *pr;
+
+	if (!sa)
+		return;
+	for (dp = domains; dp; dp = dp->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++)
+			if (pr->pr_ctlinput)
+				(*pr->pr_ctlinput)(cmd, sa, ctlparam);
+	}
+}
+
+static void
+pfslowtimo(void *arg)
+{
+	struct domain *dp;
+	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)();
+	callout_reset(&pfslow_callout, hz/2, pfslowtimo, NULL);
+}
+
+static void
+pffasttimo(void *arg)
+{
+	struct domain *dp;
+	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)();
+	callout_reset(&pffast_callout, hz/5, pffasttimo, NULL);
+}
