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/*
* 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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <arpa/inet.h>
#include <assert.h>
#include <fcntl.h>
#include <libdlpi.h>
#include <libnwam.h>
#include <net/if.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/fcntl.h>
#include <unistd.h>
#include "events.h"
#include "ncp.h"
#include "ncu.h"
#include "objects.h"
#include "util.h"
/*
* dlpi_events.c - this file contains routines to retrieve
* DL_NOTE_LINK_[UP|DOWN] events from the system and packages them for high
* level processing. Holding a dlpi_handle to a link prevents the
* associated driver unloading that can happen when IP is not plumbed,
* so it is vital to ensure that the handle is open for the lifetime
* of the WiFi connection.
*/
/*
* This is a callback function executed when dlpi_recv() gets a DL_NOTE_LINK_UP.
* It packages up the event for consumption by the link state machine.
*/
/* ARGSUSED0 */
static void
nwamd_dlpi_notify(dlpi_handle_t dhp, dlpi_notifyinfo_t *info, void *arg)
{
nwamd_event_t ev;
char *name = arg;
if (info->dni_note & DL_NOTE_LINK_UP)
ev = nwamd_event_init_link_state(name, B_TRUE);
else
ev = nwamd_event_init_link_state(name, B_FALSE);
if (ev != NULL)
nwamd_event_enqueue(ev);
}
/*
* We are only intested in DL_NOTE_LINK_UP events which we've registered for
* in nwamd_dlpi_add_link(). But we have to keep calling dlpi_recv() to
* force the notification callback to be executed.
*/
static void *
nwamd_dlpi_thread(void *arg)
{
int rc;
dlpi_handle_t *dh = arg;
do {
rc = dlpi_recv(*dh, NULL, NULL, NULL, NULL, -1, NULL);
} while (rc == DLPI_SUCCESS);
nlog(LOG_ERR, "dlpi_recv failed: %s", dlpi_strerror(rc));
return (NULL);
}
/*
* This is called when we want to start receiving notifications from state
* changes on a link.
*/
void
nwamd_dlpi_add_link(nwamd_object_t obj)
{
nwamd_ncu_t *ncu = obj->nwamd_object_data;
nwamd_link_t *link;
dlpi_notifyid_t id;
int rc;
nlog(LOG_DEBUG, "nwamd_dlpi_add_link: ncu %p (%s) type %d",
ncu, obj->nwamd_object_name, ncu != NULL ? ncu->ncu_type : -1);
assert(ncu != NULL && ncu->ncu_type == NWAM_NCU_TYPE_LINK);
link = &ncu->ncu_link;
/* Already running? */
if (link->nwamd_link_dlpi_thread != 0) {
nlog(LOG_DEBUG, "nwamd_dlpi_add_link(%s) already running",
obj->nwamd_object_name);
return;
}
rc = dlpi_open(ncu->ncu_name, &link->nwamd_link_dhp, 0);
if (rc != DLPI_SUCCESS) {
nlog(LOG_ERR, "nwamd_dlpi_add_link: dlpi_open(%s) = %s",
ncu->ncu_name, dlpi_strerror(rc));
return;
}
nwamd_set_unset_link_properties(ncu, B_TRUE);
rc = dlpi_enabnotify(link->nwamd_link_dhp,
DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN, nwamd_dlpi_notify,
ncu->ncu_name, &id);
if (rc != DLPI_SUCCESS) {
nlog(LOG_ERR,
"nwamd_dlpi_add_link: dlpi_enabnotify(%s) = %s",
obj->nwamd_object_name, dlpi_strerror(rc));
dlpi_close(link->nwamd_link_dhp);
return;
}
rc = pthread_create(&link->nwamd_link_dlpi_thread, NULL,
nwamd_dlpi_thread, &link->nwamd_link_dhp);
if (rc != 0) {
nlog(LOG_ERR, "nwamd_dlpi_add_link: couldn't create "
"dlpi thread for %s: %s", obj->nwamd_object_name,
strerror(rc));
dlpi_close(link->nwamd_link_dhp);
}
}
/*
* This function is called when we are no longer interested in receiving
* notification from state changes on a link.
*/
void
nwamd_dlpi_delete_link(nwamd_object_t obj)
{
nwamd_ncu_t *ncu = obj->nwamd_object_data;
nlog(LOG_DEBUG, "nwamd_dlpi_delete_link: ncu %p (%s) type %d",
ncu, obj->nwamd_object_name, ncu != NULL ? ncu->ncu_type : -1);
if (ncu->ncu_link.nwamd_link_dlpi_thread != 0) {
(void) pthread_cancel(
ncu->ncu_link.nwamd_link_dlpi_thread);
(void) pthread_join(ncu->ncu_link.nwamd_link_dlpi_thread, NULL);
ncu->ncu_link.nwamd_link_dlpi_thread = 0;
/* Unset properties before closing */
nwamd_set_unset_link_properties(ncu, B_FALSE);
}
dlpi_close(ncu->ncu_link.nwamd_link_dhp);
ncu->ncu_link.nwamd_link_dhp = NULL;
}
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