usr/src/uts/common/inet/arp/arp_netinfo.c - illumos-gate - Gitiles

 /*
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
  * Common Development and Distribution License (the "License").
  * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
  * See the License for the specific language governing permissions
  * and limitations under the License.
  *
  * When distributing Covered Code, include this CDDL HEADER in each
  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  * If applicable, add the following below this CDDL HEADER, with the
  * fields enclosed by brackets "[]" replaced with your own identifying
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */

 #include <sys/param.h>
 #include <sys/types.h>
 #include <sys/systm.h>
 #include <sys/cmn_err.h>
 #include <sys/stream.h>
 #include <sys/sunddi.h>
 #include <sys/hook.h>
 #include <sys/hook_impl.h>
 #include <sys/netstack.h>
 #include <net/if.h>

 #include <sys/neti.h>
 #include <sys/hook_event.h>
 #include <inet/arp_impl.h>

 /*
  * ARP netinfo entry point declarations.
  */
 static int 	arp_getifname(net_handle_t, phy_if_t, char *, const size_t);
 static int 	arp_getmtu(net_handle_t, phy_if_t, lif_if_t);
 static int 	arp_getpmtuenabled(net_handle_t);
 static int 	arp_getlifaddr(net_handle_t, phy_if_t, lif_if_t, size_t,
 		    net_ifaddr_t [], void *);
 static int	arp_getlifzone(net_handle_t, phy_if_t, lif_if_t, zoneid_t *);
 static int	arp_getlifflags(net_handle_t, phy_if_t, lif_if_t, uint64_t *);
 static phy_if_t arp_phygetnext(net_handle_t, phy_if_t);
 static phy_if_t arp_phylookup(net_handle_t, const char *);
 static lif_if_t arp_lifgetnext(net_handle_t, phy_if_t, lif_if_t);
 static int 	arp_inject(net_handle_t, inject_t, net_inject_t *);
 static phy_if_t arp_routeto(net_handle_t, struct sockaddr *, struct sockaddr *);
 static int 	arp_ispartialchecksum(net_handle_t, mblk_t *);
 static int 	arp_isvalidchecksum(net_handle_t, mblk_t *);

 static net_protocol_t arp_netinfo = {
 	NETINFO_VERSION,
 	NHF_ARP,
 	arp_getifname,
 	arp_getmtu,
 	arp_getpmtuenabled,
 	arp_getlifaddr,
 	arp_getlifzone,
 	arp_getlifflags,
 	arp_phygetnext,
 	arp_phylookup,
 	arp_lifgetnext,
 	arp_inject,
 	arp_routeto,
 	arp_ispartialchecksum,
 	arp_isvalidchecksum
 };

 /*
  * Register ARP netinfo functions.
  */
 void
 arp_net_init(arp_stack_t *as, netstackid_t stackid)
 {
 	netid_t id;

 	id = net_getnetidbynetstackid(stackid);
 	ASSERT(id != -1);

 	as->as_net_data = net_protocol_register(id, &arp_netinfo);
 	ASSERT(as->as_net_data != NULL);
 }

 void
 arp_net_shutdown(arp_stack_t *as)
 {
 	if (as->as_arpnicevents != NULL) {
 		(void) net_event_shutdown(as->as_net_data,
 		    &as->as_arp_nic_events);
 	}

 	if (as->as_arp_physical_out != NULL) {
 		(void) net_event_shutdown(as->as_net_data,
 		    &as->as_arp_physical_out_event);
 	}

 	if (as->as_arp_physical_in != NULL) {
 		(void) net_event_shutdown(as->as_net_data,
 		    &as->as_arp_physical_in_event);
 	}

 	(void) net_family_shutdown(as->as_net_data, &as->as_arproot);
 }

 /*
  * Unregister ARP netinfo functions.
  */
 void
 arp_net_destroy(arp_stack_t *as)
 {
 	if (net_protocol_unregister(as->as_net_data) == 0)
 		as->as_net_data = NULL;
 }

 /*
  * Initialize ARP hook family and events
  */
 void
 arp_hook_init(arp_stack_t *as)
 {
 	HOOK_FAMILY_INIT(&as->as_arproot, Hn_ARP);
 	if (net_family_register(as->as_net_data, &as->as_arproot) != 0) {
 		cmn_err(CE_NOTE, "arp_hook_init: "
 		    "net_family_register failed for arp");
 	}

 	HOOK_EVENT_INIT(&as->as_arp_physical_in_event, NH_PHYSICAL_IN);
 	as->as_arp_physical_in = net_event_register(as->as_net_data,
 	    &as->as_arp_physical_in_event);
 	if (as->as_arp_physical_in == NULL) {
 		cmn_err(CE_NOTE, "arp_hook_init: "
 		    "net_event_register failed for arp/physical_in");
 	}

 	HOOK_EVENT_INIT(&as->as_arp_physical_out_event, NH_PHYSICAL_OUT);
 	as->as_arp_physical_out = net_event_register(as->as_net_data,
 	    &as->as_arp_physical_out_event);
 	if (as->as_arp_physical_out == NULL) {
 		cmn_err(CE_NOTE, "arp_hook_init: "
 		    "net_event_register failed for arp/physical_out");
 	}

 	HOOK_EVENT_INIT(&as->as_arp_nic_events, NH_NIC_EVENTS);
 	as->as_arpnicevents = net_event_register(as->as_net_data,
 	    &as->as_arp_nic_events);
 	if (as->as_arpnicevents == NULL) {
 		cmn_err(CE_NOTE, "arp_hook_init: "
 		    "net_event_register failed for arp/nic_events");
 	}
 }

 void
 arp_hook_destroy(arp_stack_t *as)
 {
 	if (as->as_arpnicevents != NULL) {
 		if (net_event_unregister(as->as_net_data,
 		    &as->as_arp_nic_events) == 0)
 			as->as_arpnicevents = NULL;
 	}

 	if (as->as_arp_physical_out != NULL) {
 		if (net_event_unregister(as->as_net_data,
 		    &as->as_arp_physical_out_event) == 0)
 			as->as_arp_physical_out = NULL;
 	}

 	if (as->as_arp_physical_in != NULL) {
 		if (net_event_unregister(as->as_net_data,
 		    &as->as_arp_physical_in_event) == 0)
 			as->as_arp_physical_in = NULL;
 	}

 	(void) net_family_unregister(as->as_net_data, &as->as_arproot);
 }

 /*
  * Determine the name of the lower level interface
  */
 static int
 arp_getifname(net_handle_t net, phy_if_t phy_ifdata, char *buffer,
     const size_t buflen)
 {
 	arl_t	*arl;
 	arp_stack_t *as;
 	netstack_t *ns = net->netd_stack->nts_netstack;

 	ASSERT(buffer != NULL);
 	ASSERT(ns != NULL);

 	as = ns->netstack_arp;
 	rw_enter(&as->as_arl_lock, RW_READER);
 	for (arl = as->as_arl_head; arl != NULL; arl = arl->arl_next) {
 		if (arl->arl_index == phy_ifdata) {
 			(void) strlcpy(buffer, arl->arl_name, buflen);
 			rw_exit(&as->as_arl_lock);
 			return (0);
 		}
 	}
 	rw_exit(&as->as_arl_lock);

 	return (1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_getmtu(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata)
 {
 	return (-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_getpmtuenabled(net_handle_t net)
 {
 	return (-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_getlifaddr(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata,
     size_t nelem, net_ifaddr_t type[], void *storage)
 {
 	return (-1);
 }

 /*
  * Determine the instance number of the next lower level interface
  */
 static phy_if_t
 arp_phygetnext(net_handle_t net, phy_if_t phy_ifdata)
 {
 	arl_t *arl;
 	int index;
 	arp_stack_t *as;
 	netstack_t *ns = net->netd_stack->nts_netstack;

 	ASSERT(ns != NULL);

 	as = ns->netstack_arp;
 	rw_enter(&as->as_arl_lock, RW_READER);
 	if (phy_ifdata == 0) {
 		arl = as->as_arl_head;
 	} else {
 		for (arl = as->as_arl_head; arl != NULL;
 		    arl = arl->arl_next) {
 			if (arl->arl_index == phy_ifdata) {
 				arl = arl->arl_next;
 				break;
 			}
 		}
 	}

 	index = (arl != NULL) ? arl->arl_index : 0;

 	rw_exit(&as->as_arl_lock);

 	return (index);
 }

 /*
  * Given a network interface name, find its ARP layer instance number.
  */
 static phy_if_t
 arp_phylookup(net_handle_t net, const char *name)
 {
 	arl_t *arl;
 	int index;
 	arp_stack_t *as;
 	netstack_t *ns = net->netd_stack->nts_netstack;

 	ASSERT(name != NULL);
 	ASSERT(ns != NULL);

 	index = 0;
 	as = ns->netstack_arp;
 	rw_enter(&as->as_arl_lock, RW_READER);
 	for (arl = as->as_arl_head; arl != NULL; arl = arl->arl_next) {
 		if (strcmp(name, arl->arl_name) == 0) {
 			index = arl->arl_index;
 			break;
 		}
 	}
 	rw_exit(&as->as_arl_lock);

 	return (index);

 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static lif_if_t
 arp_lifgetnext(net_handle_t net, phy_if_t ifp, lif_if_t lif)
 {
 	return ((lif_if_t)-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_inject(net_handle_t net, inject_t injection, net_inject_t *neti)
 {
 	return (-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static phy_if_t
 arp_routeto(net_handle_t net, struct sockaddr *addr, struct sockaddr *next)
 {
 	return ((phy_if_t)-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 int
 arp_ispartialchecksum(net_handle_t net, mblk_t *mb)
 {
 	return (-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_isvalidchecksum(net_handle_t net, mblk_t *mb)
 {
 	return (-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_getlifzone(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata,
     zoneid_t *zoneid)
 {
 	return (-1);
 }

 /*
  * Unsupported with ARP.
  */
 /*ARGSUSED*/
 static int
 arp_getlifflags(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata,
     uint64_t *flags)
 {
 	return (-1);
 }
	/*
	* CDDL HEADER START
	*
	* The contents of this file are subject to the terms of the
	* Common Development and Distribution License (the "License").
	* You may not use this file except in compliance with the License.
	*
	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	* or http://www.opensolaris.org/os/licensing.
	* See the License for the specific language governing permissions
	* and limitations under the License.
	*
	* When distributing Covered Code, include this CDDL HEADER in each
	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	* If applicable, add the following below this CDDL HEADER, with the
	* fields enclosed by brackets "[]" replaced with your own identifying
	* information: Portions Copyright [yyyy] [name of copyright owner]
	*
	* CDDL HEADER END
	*/
	/*
	* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
	* Use is subject to license terms.
	*/

	#include <sys/param.h>
	#include <sys/types.h>
	#include <sys/systm.h>
	#include <sys/cmn_err.h>
	#include <sys/stream.h>
	#include <sys/sunddi.h>
	#include <sys/hook.h>
	#include <sys/hook_impl.h>
	#include <sys/netstack.h>
	#include <net/if.h>

	#include <sys/neti.h>
	#include <sys/hook_event.h>
	#include <inet/arp_impl.h>

	/*
	* ARP netinfo entry point declarations.
	*/
	static int arp_getifname(net_handle_t, phy_if_t, char *, const size_t);
	static int arp_getmtu(net_handle_t, phy_if_t, lif_if_t);
	static int arp_getpmtuenabled(net_handle_t);
	static int arp_getlifaddr(net_handle_t, phy_if_t, lif_if_t, size_t,
	net_ifaddr_t [], void *);
	static int arp_getlifzone(net_handle_t, phy_if_t, lif_if_t, zoneid_t *);
	static int arp_getlifflags(net_handle_t, phy_if_t, lif_if_t, uint64_t *);
	static phy_if_t arp_phygetnext(net_handle_t, phy_if_t);
	static phy_if_t arp_phylookup(net_handle_t, const char *);
	static lif_if_t arp_lifgetnext(net_handle_t, phy_if_t, lif_if_t);
	static int arp_inject(net_handle_t, inject_t, net_inject_t *);
	static phy_if_t arp_routeto(net_handle_t, struct sockaddr , struct sockaddr );
	static int arp_ispartialchecksum(net_handle_t, mblk_t *);
	static int arp_isvalidchecksum(net_handle_t, mblk_t *);

	static net_protocol_t arp_netinfo = {
	NETINFO_VERSION,
	NHF_ARP,
	arp_getifname,
	arp_getmtu,
	arp_getpmtuenabled,
	arp_getlifaddr,
	arp_getlifzone,
	arp_getlifflags,
	arp_phygetnext,
	arp_phylookup,
	arp_lifgetnext,
	arp_inject,
	arp_routeto,
	arp_ispartialchecksum,
	arp_isvalidchecksum
	};

	/*
	* Register ARP netinfo functions.
	*/
	void
	arp_net_init(arp_stack_t *as, netstackid_t stackid)
	{
	netid_t id;

	id = net_getnetidbynetstackid(stackid);
	ASSERT(id != -1);

	as->as_net_data = net_protocol_register(id, &arp_netinfo);
	ASSERT(as->as_net_data != NULL);
	}

	void
	arp_net_shutdown(arp_stack_t *as)
	{
	if (as->as_arpnicevents != NULL) {
	(void) net_event_shutdown(as->as_net_data,
	&as->as_arp_nic_events);
	}

	if (as->as_arp_physical_out != NULL) {
	(void) net_event_shutdown(as->as_net_data,
	&as->as_arp_physical_out_event);
	}

	if (as->as_arp_physical_in != NULL) {
	(void) net_event_shutdown(as->as_net_data,
	&as->as_arp_physical_in_event);
	}

	(void) net_family_shutdown(as->as_net_data, &as->as_arproot);
	}

	/*
	* Unregister ARP netinfo functions.
	*/
	void
	arp_net_destroy(arp_stack_t *as)
	{
	if (net_protocol_unregister(as->as_net_data) == 0)
	as->as_net_data = NULL;
	}

	/*
	* Initialize ARP hook family and events
	*/
	void
	arp_hook_init(arp_stack_t *as)
	{
	HOOK_FAMILY_INIT(&as->as_arproot, Hn_ARP);
	if (net_family_register(as->as_net_data, &as->as_arproot) != 0) {
	cmn_err(CE_NOTE, "arp_hook_init: "
	"net_family_register failed for arp");
	}

	HOOK_EVENT_INIT(&as->as_arp_physical_in_event, NH_PHYSICAL_IN);
	as->as_arp_physical_in = net_event_register(as->as_net_data,
	&as->as_arp_physical_in_event);
	if (as->as_arp_physical_in == NULL) {
	cmn_err(CE_NOTE, "arp_hook_init: "
	"net_event_register failed for arp/physical_in");
	}

	HOOK_EVENT_INIT(&as->as_arp_physical_out_event, NH_PHYSICAL_OUT);
	as->as_arp_physical_out = net_event_register(as->as_net_data,
	&as->as_arp_physical_out_event);
	if (as->as_arp_physical_out == NULL) {
	cmn_err(CE_NOTE, "arp_hook_init: "
	"net_event_register failed for arp/physical_out");
	}

	HOOK_EVENT_INIT(&as->as_arp_nic_events, NH_NIC_EVENTS);
	as->as_arpnicevents = net_event_register(as->as_net_data,
	&as->as_arp_nic_events);
	if (as->as_arpnicevents == NULL) {
	cmn_err(CE_NOTE, "arp_hook_init: "
	"net_event_register failed for arp/nic_events");
	}
	}

	void
	arp_hook_destroy(arp_stack_t *as)
	{
	if (as->as_arpnicevents != NULL) {
	if (net_event_unregister(as->as_net_data,
	&as->as_arp_nic_events) == 0)
	as->as_arpnicevents = NULL;
	}

	if (as->as_arp_physical_out != NULL) {
	if (net_event_unregister(as->as_net_data,
	&as->as_arp_physical_out_event) == 0)
	as->as_arp_physical_out = NULL;
	}

	if (as->as_arp_physical_in != NULL) {
	if (net_event_unregister(as->as_net_data,
	&as->as_arp_physical_in_event) == 0)
	as->as_arp_physical_in = NULL;
	}

	(void) net_family_unregister(as->as_net_data, &as->as_arproot);
	}

	/*
	* Determine the name of the lower level interface
	*/
	static int
	arp_getifname(net_handle_t net, phy_if_t phy_ifdata, char *buffer,
	const size_t buflen)
	{
	arl_t *arl;
	arp_stack_t *as;
	netstack_t *ns = net->netd_stack->nts_netstack;

	ASSERT(buffer != NULL);
	ASSERT(ns != NULL);

	as = ns->netstack_arp;
	rw_enter(&as->as_arl_lock, RW_READER);
	for (arl = as->as_arl_head; arl != NULL; arl = arl->arl_next) {
	if (arl->arl_index == phy_ifdata) {
	(void) strlcpy(buffer, arl->arl_name, buflen);
	rw_exit(&as->as_arl_lock);
	return (0);
	}
	}
	rw_exit(&as->as_arl_lock);

	return (1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_getmtu(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata)
	{
	return (-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_getpmtuenabled(net_handle_t net)
	{
	return (-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_getlifaddr(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata,
	size_t nelem, net_ifaddr_t type[], void *storage)
	{
	return (-1);
	}

	/*
	* Determine the instance number of the next lower level interface
	*/
	static phy_if_t
	arp_phygetnext(net_handle_t net, phy_if_t phy_ifdata)
	{
	arl_t *arl;
	int index;
	arp_stack_t *as;
	netstack_t *ns = net->netd_stack->nts_netstack;

	ASSERT(ns != NULL);

	as = ns->netstack_arp;
	rw_enter(&as->as_arl_lock, RW_READER);
	if (phy_ifdata == 0) {
	arl = as->as_arl_head;
	} else {
	for (arl = as->as_arl_head; arl != NULL;
	arl = arl->arl_next) {
	if (arl->arl_index == phy_ifdata) {
	arl = arl->arl_next;
	break;
	}
	}
	}

	index = (arl != NULL) ? arl->arl_index : 0;

	rw_exit(&as->as_arl_lock);

	return (index);
	}

	/*
	* Given a network interface name, find its ARP layer instance number.
	*/
	static phy_if_t
	arp_phylookup(net_handle_t net, const char *name)
	{
	arl_t *arl;
	int index;
	arp_stack_t *as;
	netstack_t *ns = net->netd_stack->nts_netstack;

	ASSERT(name != NULL);
	ASSERT(ns != NULL);

	index = 0;
	as = ns->netstack_arp;
	rw_enter(&as->as_arl_lock, RW_READER);
	for (arl = as->as_arl_head; arl != NULL; arl = arl->arl_next) {
	if (strcmp(name, arl->arl_name) == 0) {
	index = arl->arl_index;
	break;
	}
	}
	rw_exit(&as->as_arl_lock);

	return (index);

	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static lif_if_t
	arp_lifgetnext(net_handle_t net, phy_if_t ifp, lif_if_t lif)
	{
	return ((lif_if_t)-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_inject(net_handle_t net, inject_t injection, net_inject_t *neti)
	{
	return (-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static phy_if_t
	arp_routeto(net_handle_t net, struct sockaddr addr, struct sockaddr next)
	{
	return ((phy_if_t)-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	int
	arp_ispartialchecksum(net_handle_t net, mblk_t *mb)
	{
	return (-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_isvalidchecksum(net_handle_t net, mblk_t *mb)
	{
	return (-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_getlifzone(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata,
	zoneid_t *zoneid)
	{
	return (-1);
	}

	/*
	* Unsupported with ARP.
	*/
	/ARGSUSED/
	static int
	arp_getlifflags(net_handle_t net, phy_if_t phy_ifdata, lif_if_t ifdata,
	uint64_t *flags)
	{
	return (-1);
	}