/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011 Adrian Chadd, Xenion Lty Ltd
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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>
#ifdef __FreeBSD__
__FBSDID("$FreeBSD$");
#endif
/*
* net80211 fast-logging support, primarily for debugging.
*
* This implements a single debugging queue which includes
* per-device enumeration where needed.
*/
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/ucred.h>
#include <sys/alq.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_freebsd.h>
#include <net80211/ieee80211_alq.h>
static struct alq *ieee80211_alq;
static int ieee80211_alq_lost;
static int ieee80211_alq_logged;
static char ieee80211_alq_logfile[MAXPATHLEN] = "/tmp/net80211.log";
static unsigned int ieee80211_alq_qsize = 64*1024;
static int
ieee80211_alq_setlogging(int enable)
{
int error;
if (enable) {
if (ieee80211_alq)
alq_close(ieee80211_alq);
error = alq_open(&ieee80211_alq,
ieee80211_alq_logfile,
curthread->td_ucred,
ALQ_DEFAULT_CMODE,
ieee80211_alq_qsize, 0);
ieee80211_alq_lost = 0;
ieee80211_alq_logged = 0;
printf("net80211: logging to %s enabled; "
"struct size %d bytes\n",
ieee80211_alq_logfile,
(int) sizeof(struct ieee80211_alq_rec));
} else {
if (ieee80211_alq)
alq_close(ieee80211_alq);
ieee80211_alq = NULL;
printf("net80211: logging disabled\n");
error = 0;
}
return (error);
}
static int
sysctl_ieee80211_alq_log(SYSCTL_HANDLER_ARGS)
{
int error, enable;
enable = (ieee80211_alq != NULL);
error = sysctl_handle_int(oidp, &enable, 0, req);
if (error || !req->newptr)
return (error);
else
return (ieee80211_alq_setlogging(enable));
}
SYSCTL_PROC(_net_wlan, OID_AUTO, alq,
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 0, 0,
sysctl_ieee80211_alq_log, "I",
"Enable net80211 alq logging");
SYSCTL_INT(_net_wlan, OID_AUTO, alq_size, CTLFLAG_RW,
&ieee80211_alq_qsize, 0, "In-memory log size (bytes)");
SYSCTL_INT(_net_wlan, OID_AUTO, alq_lost, CTLFLAG_RW,
&ieee80211_alq_lost, 0, "Debugging operations not logged");
SYSCTL_INT(_net_wlan, OID_AUTO, alq_logged, CTLFLAG_RW,
&ieee80211_alq_logged, 0, "Debugging operations logged");
static struct ale *
ieee80211_alq_get(size_t len)
{
struct ale *ale;
ale = alq_getn(ieee80211_alq, len + sizeof(struct ieee80211_alq_rec),
ALQ_NOWAIT);
if (!ale)
ieee80211_alq_lost++;
else
ieee80211_alq_logged++;
return ale;
}
int
ieee80211_alq_log(struct ieee80211com *ic, struct ieee80211vap *vap,
uint32_t op, uint32_t flags, uint16_t srcid, const uint8_t *src,
size_t len)
{
struct ale *ale;
struct ieee80211_alq_rec *r;
char *dst;
/* Don't log if we're disabled */
if (ieee80211_alq == NULL)
return (0);
if (len > IEEE80211_ALQ_MAX_PAYLOAD)
return (ENOMEM);
ale = ieee80211_alq_get(len);
if (! ale)
return (ENOMEM);
r = (struct ieee80211_alq_rec *) ale->ae_data;
dst = ((char *) r) + sizeof(struct ieee80211_alq_rec);
r->r_timestamp = htobe64(ticks);
if (vap != NULL) {
r->r_wlan = htobe16(vap->iv_ifp->if_dunit);
} else {
r->r_wlan = 0xffff;
}
r->r_src = htobe16(srcid);
r->r_flags = htobe32(flags);
r->r_op = htobe32(op);
r->r_len = htobe32(len + sizeof(struct ieee80211_alq_rec));
r->r_threadid = htobe32((uint32_t) curthread->td_tid);
if (src != NULL)
memcpy(dst, src, len);
alq_post(ieee80211_alq, ale);
return (0);
}
