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