freebsd-dev/sys/netncp/ncp_subr.c
Boris Popov 29ad26f932 Major update of NCP requester:
Use mchain API to work with mbuf chains.

Do not depend on INET and IPX options.

Allocate ncp_rq structure dynamically to prevent possible stack overflows.

Let ncp_request() dispose control structure if request failed.

Move all NCP wrappers to ncp_ncp.c file and all NCP request processing
functions to ncp_rq.c file.

Improve reconnection logic.

Misc style fixes.
2001-03-10 05:24:45 +00:00

153 lines
4.1 KiB
C

/*
* 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/malloc.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 void ncp_at_exit(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(struct proc *p)
{
struct ncp_conn *ncp, *nncp;
if (ncp_conn_putprochandles(p) == 0) return;
ncp_conn_locklist(LK_EXCLUSIVE, p);
for (ncp = SLIST_FIRST(&conn_list); ncp; ncp = nncp) {
nncp = SLIST_NEXT(ncp, nc_next);
if (ncp_conn_lock(ncp, p, p->p_ucred,NCPM_READ|NCPM_EXECUTE|NCPM_WRITE))
continue;
if (ncp_conn_free(ncp) != 0)
ncp_conn_unlock(ncp,p);
}
ncp_conn_unlocklist(p);
return;
}
int
ncp_sysctlbyname(char *name, void *old, size_t *oldlenp,
void *new, size_t newlen, size_t *retval)
{
int oid[CTL_MAXNAME];
int nmlen, plen, error;
oid[0] = 0; /* sysctl internal magic */
oid[1] = 3; /* name2oid */
nmlen = sizeof(oid);
error = kernel_sysctl(curproc, oid, 2, oid, &nmlen, name, strlen(name), &plen);
if (error)
return error;
error = kernel_sysctl(curproc, oid, plen / sizeof(int), old, oldlenp,
new, newlen, retval);
return error;
}
int
ncp_init(void)
{
ncp_conn_init();
if (at_exit(ncp_at_exit)) {
NCPFATAL("can't register at_exit handler\n");
return ENOMEM;
}
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);
rm_at_exit(ncp_at_exit);
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);
}