1/*	$NetBSD: packet.c,v 1.1 2008/08/17 13:20:57 plunky Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2008 Iain Hibbert
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: packet.c,v 1.1 2008/08/17 13:20:57 plunky Exp $");
33
34#define L2CAP_SOCKET_CHECKED
35#include "btpand.h"
36
37packet_t *
38packet_alloc(channel_t *chan)
39{
40	packet_t *pkt;
41
42	pkt = malloc(sizeof(packet_t) + chan->mru);
43	if (pkt == NULL) {
44		log_err("%s() failed: %m", __func__);
45		return NULL;
46	}
47
48	memset(pkt, 0, sizeof(packet_t));
49	STAILQ_INIT(&pkt->extlist);
50	pkt->ptr = pkt->buf;
51
52	pkt->chan = chan;
53	chan->refcnt++;
54
55	return pkt;
56}
57
58void
59packet_free(packet_t *pkt)
60{
61	exthdr_t *eh;
62
63	if (pkt->refcnt-- > 0)
64		return;
65
66	while ((eh = STAILQ_FIRST(&pkt->extlist)) != NULL) {
67		STAILQ_REMOVE_HEAD(&pkt->extlist, next);
68		free(eh);
69	}
70
71	pkt->chan->refcnt--;
72	if (pkt->chan->refcnt == 0)
73		channel_free(pkt->chan);
74
75	free(pkt);
76}
77
78void
79packet_adj(packet_t *pkt, size_t size)
80{
81
82	assert(pkt->refcnt == 0);
83	assert(pkt->len >= size);
84
85	pkt->ptr += size;
86	pkt->len -= size;
87}
88
89pkthdr_t *
90pkthdr_alloc(packet_t *pkt)
91{
92	pkthdr_t *ph;
93
94	ph = malloc(sizeof(pkthdr_t));
95	if (ph == NULL) {
96		log_err("%s() failed: %m", __func__);
97		return NULL;
98	}
99
100	ph->data = pkt;
101	pkt->refcnt++;
102
103	return ph;
104}
105
106void
107pkthdr_free(pkthdr_t *ph)
108{
109
110	packet_free(ph->data);
111	free(ph);
112}
113