arp_netinfo.c revision 08ee25ae754a3b9ee3786f304f066ae14dc6e379
/*
* 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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#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 <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(phy_if_t, char *, const size_t);
static int arp_getmtu(phy_if_t, lif_if_t);
static int arp_getpmtuenabled(void);
static int arp_getlifaddr(phy_if_t, lif_if_t, size_t,
net_ifaddr_t [], void *);
static phy_if_t arp_phygetnext(phy_if_t);
static phy_if_t arp_phylookup(const char *);
static lif_if_t arp_lifgetnext(phy_if_t, lif_if_t);
static int arp_inject(inject_t, net_inject_t *);
static phy_if_t arp_routeto(struct sockaddr *);
static int arp_ispartialchecksum(mblk_t *);
static int arp_isvalidchecksum(mblk_t *);
static net_info_t arp_netinfo = {
NETINFO_VERSION,
NHF_ARP,
arp_getifname,
arp_getmtu,
arp_getpmtuenabled,
arp_getlifaddr,
arp_phygetnext,
arp_phylookup,
arp_lifgetnext,
arp_inject,
arp_routeto,
arp_ispartialchecksum,
arp_isvalidchecksum
};
static hook_family_t arproot;
/*
* Hooks for ARP
*/
hook_event_t arp_physical_in_event;
hook_event_t arp_physical_out_event;
hook_event_t arp_nic_events;
hook_event_token_t arp_physical_in;
hook_event_token_t arp_physical_out;
hook_event_token_t arpnicevents;
net_data_t arp = NULL;
/*
* Register ARP netinfo functions.
*/
void
arp_net_init()
{
arp = net_register(&arp_netinfo);
ASSERT(arp != NULL);
}
/*
* Unregister ARP netinfo functions.
*/
void
arp_net_destroy()
{
(void) net_unregister(arp);
}
/*
* Initialize ARP hook family and events
*/
void
arp_hook_init()
{
HOOK_FAMILY_INIT(&arproot, Hn_ARP);
if (net_register_family(arp, &arproot) != 0) {
cmn_err(CE_NOTE, "arp_hook_init: "
"net_register_family failed for arp");
}
HOOK_EVENT_INIT(&arp_physical_in_event, NH_PHYSICAL_IN);
arp_physical_in = net_register_event(arp, &arp_physical_in_event);
if (arp_physical_in == NULL) {
cmn_err(CE_NOTE, "arp_hook_init: "
"net_register_event failed for arp/physical_in");
}
HOOK_EVENT_INIT(&arp_physical_out_event, NH_PHYSICAL_OUT);
arp_physical_out = net_register_event(arp, &arp_physical_out_event);
if (arp_physical_out == NULL) {
cmn_err(CE_NOTE, "arp_hook_init: "
"net_register_event failed for arp/physical_out");
}
HOOK_EVENT_INIT(&arp_nic_events, NH_NIC_EVENTS);
arpnicevents = net_register_event(arp, &arp_nic_events);
if (arpnicevents == NULL) {
cmn_err(CE_NOTE, "arp_hook_init: "
"net_register_event failed for arp/nic_events");
}
}
void
arp_hook_destroy()
{
if (arpnicevents != NULL) {
if (net_unregister_event(arp, &arp_nic_events) == 0)
arpnicevents = NULL;
}
if (arp_physical_out != NULL) {
if (net_unregister_event(arp, &arp_physical_out_event) == 0)
arp_physical_out = NULL;
}
if (arp_physical_in != NULL) {
if (net_unregister_event(arp, &arp_physical_in_event) == 0)
arp_physical_in = NULL;
}
(void) net_unregister_family(arp, &arproot);
}
/*
* Determine the name of the lower level interface
*/
int
arp_getifname(phy_if_t phy_ifdata, char *buffer, const size_t buflen)
{
arl_t *arl;
ASSERT(buffer != NULL);
rw_enter(&arl_g_lock, RW_READER);
for (arl = arl_g_head; arl != NULL; arl = arl->arl_next) {
if (arl->arl_index == phy_ifdata) {
(void) strlcpy(buffer, arl->arl_name, buflen);
rw_exit(&arl_g_lock);
return (0);
}
}
rw_exit(&arl_g_lock);
return (1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
int
arp_getmtu(phy_if_t phy_ifdata, lif_if_t ifdata)
{
return (-1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
int
arp_getpmtuenabled(void)
{
return (-1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
int
arp_getlifaddr(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
*/
phy_if_t
arp_phygetnext(phy_if_t phy_ifdata)
{
arl_t *arl;
int index;
rw_enter(&arl_g_lock, RW_READER);
if (phy_ifdata == 0) {
arl = arl_g_head;
} else {
for (arl = arl_g_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(&arl_g_lock);
return (index);
}
/*
* Given a network interface name, find its ARP layer instance number.
*/
phy_if_t
arp_phylookup(const char *name)
{
arl_t *arl;
int index;
ASSERT(name != NULL);
index = 0;
rw_enter(&arl_g_lock, RW_READER);
for (arl = arl_g_head; arl != NULL; arl = arl->arl_next) {
if (strcmp(name, arl->arl_name) == 0) {
index = arl->arl_index;
break;
}
}
rw_exit(&arl_g_lock);
return (index);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
lif_if_t
arp_lifgetnext(phy_if_t ifp, lif_if_t lif)
{
return ((lif_if_t)-1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
int
arp_inject(inject_t injection, net_inject_t *neti)
{
return (-1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
phy_if_t
arp_routeto(struct sockaddr *addr)
{
return ((phy_if_t)-1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
int
arp_ispartialchecksum(mblk_t *mb)
{
return (-1);
}
/*
* Unsupported with ARP.
*/
/*ARGSUSED*/
int
arp_isvalidchecksum(mblk_t *mb)
{
return (-1);
}