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