/*-
* Copyright (c) 1999, 2000, 2001 Boris Popov
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <netncp/ncp.h>
#include <netncp/ncp_conn.h>
#include <netncp/ncp_sock.h>
#include <netncp/ncp_subr.h>
#include <netncp/ncp_rq.h>
#include <netncp/ncp_ncp.h>
#include <netncp/nwerror.h>
int ncp_debuglevel = 0;
struct callout_handle ncp_timer_handle;
static eventhandler_tag ncp_exit_tag;
static void ncp_at_exit(void *arg, struct proc *p);
static void ncp_timer(void *arg);
/*
* duplicate string from user space. It should be very-very slow.
*/
char *
ncp_str_dup(char *s) {
char *p, bt;
int len = 0;
for (p = s;;p++) {
if (copyin(p, &bt, 1)) return NULL;
len++;
if (bt == 0) break;
}
MALLOC(p, char*, len, M_NCPDATA, M_WAITOK);
copyin(s, p, len);
return p;
}
void
ncp_at_exit(void *arg, struct proc *p)
{
struct ncp_conn *ncp, *nncp;
struct thread *td;
mtx_lock(&Giant);
FOREACH_THREAD_IN_PROC(p, td) {
if (ncp_conn_putprochandles(td) == 0)
continue;
ncp_conn_locklist(LK_EXCLUSIVE, td);
for (ncp = SLIST_FIRST(&conn_list); ncp; ncp = nncp) {
nncp = SLIST_NEXT(ncp, nc_next);
if (ncp_conn_lock(ncp, td, td->td_ucred,
NCPM_READ | NCPM_EXECUTE | NCPM_WRITE))
continue;
if (ncp_conn_free(ncp) != 0)
ncp_conn_unlock(ncp, td);
}
ncp_conn_unlocklist(td);
}
mtx_unlock(&Giant);
}
int
ncp_init(void)
{
ncp_conn_init();
ncp_exit_tag = EVENTHANDLER_REGISTER(process_exit, ncp_at_exit, NULL,
EVENTHANDLER_PRI_ANY);
ncp_timer_handle = timeout(ncp_timer, NULL, NCP_TIMER_TICK);
return 0;
}
int
ncp_done(void)
{
int error;
error = ncp_conn_destroy();
if (error)
return error;
untimeout(ncp_timer, NULL, ncp_timer_handle);
EVENTHANDLER_DEREGISTER(process_exit, ncp_exit_tag);
return 0;
}
/* tick every second and check for watch dog packets and lost connections */
static void
ncp_timer(void *arg)
{
struct ncp_conn *conn;
if(ncp_conn_locklist(LK_SHARED | LK_NOWAIT, NULL) == 0) {
SLIST_FOREACH(conn, &conn_list, nc_next)
ncp_check_conn(conn);
ncp_conn_unlocklist(NULL);
}
ncp_timer_handle = timeout(ncp_timer, NULL, NCP_TIMER_TICK);
}
