freebsd-skq/usr.sbin/bluetooth/btpand/packet.c
emax 8d4db62642 Add btpand(8) daemon from NetBSD. This daemon provides support for
Bluetooth Network Access Point (NAP), Group Ad-hoc Network (GN) and
Personal Area Network User (PANU) profiles.

Obtained from:	NetBSD
MFC after:	1 month
2009-01-30 22:23:21 +00:00

111 lines
2.5 KiB
C

/* $NetBSD: packet.c,v 1.1 2008/08/17 13:20:57 plunky Exp $ */
/*-
* Copyright (c) 2008 Iain Hibbert
* 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.
*/
/* $FreeBSD$ */
#include <sys/cdefs.h>
__RCSID("$NetBSD: packet.c,v 1.1 2008/08/17 13:20:57 plunky Exp $");
#include "btpand.h"
packet_t *
packet_alloc(channel_t *chan)
{
packet_t *pkt;
pkt = malloc(sizeof(packet_t) + chan->mru);
if (pkt == NULL) {
log_err("%s() failed: %m", __func__);
return NULL;
}
memset(pkt, 0, sizeof(packet_t));
STAILQ_INIT(&pkt->extlist);
pkt->ptr = pkt->buf;
pkt->chan = chan;
chan->refcnt++;
return pkt;
}
void
packet_free(packet_t *pkt)
{
exthdr_t *eh;
if (pkt->refcnt-- > 0)
return;
while ((eh = STAILQ_FIRST(&pkt->extlist)) != NULL) {
STAILQ_REMOVE_HEAD(&pkt->extlist, next);
free(eh);
}
pkt->chan->refcnt--;
if (pkt->chan->refcnt == 0)
channel_free(pkt->chan);
free(pkt);
}
void
packet_adj(packet_t *pkt, size_t size)
{
assert(pkt->refcnt == 0);
assert(pkt->len >= size);
pkt->ptr += size;
pkt->len -= size;
}
pkthdr_t *
pkthdr_alloc(packet_t *pkt)
{
pkthdr_t *ph;
ph = malloc(sizeof(pkthdr_t));
if (ph == NULL) {
log_err("%s() failed: %m", __func__);
return NULL;
}
ph->data = pkt;
pkt->refcnt++;
return ph;
}
void
pkthdr_free(pkthdr_t *ph)
{
packet_free(ph->data);
free(ph);
}