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 /* $FreeBSD$ */ 29 30 #include <sys/cdefs.h> 31 __RCSID("$NetBSD: packet.c,v 1.1 2008/08/17 13:20:57 plunky Exp $"); 32 33 #include "btpand.h" 34 35 packet_t * 36 packet_alloc(channel_t *chan) 37 { 38 packet_t *pkt; 39 40 pkt = malloc(sizeof(packet_t) + chan->mru); 41 if (pkt == NULL) { 42 log_err("%s() failed: %m", __func__); 43 return NULL; 44 } 45 46 memset(pkt, 0, sizeof(packet_t)); 47 STAILQ_INIT(&pkt->extlist); 48 pkt->ptr = pkt->buf; 49 50 pkt->chan = chan; 51 chan->refcnt++; 52 53 return pkt; 54 } 55 56 void 57 packet_free(packet_t *pkt) 58 { 59 exthdr_t *eh; 60 61 if (pkt->refcnt-- > 0) 62 return; 63 64 while ((eh = STAILQ_FIRST(&pkt->extlist)) != NULL) { 65 STAILQ_REMOVE_HEAD(&pkt->extlist, next); 66 free(eh); 67 } 68 69 pkt->chan->refcnt--; 70 if (pkt->chan->refcnt == 0) 71 channel_free(pkt->chan); 72 73 free(pkt); 74 } 75 76 void 77 packet_adj(packet_t *pkt, size_t size) 78 { 79 80 assert(pkt->refcnt == 0); 81 assert(pkt->len >= size); 82 83 pkt->ptr += size; 84 pkt->len -= size; 85 } 86 87 pkthdr_t * 88 pkthdr_alloc(packet_t *pkt) 89 { 90 pkthdr_t *ph; 91 92 ph = malloc(sizeof(pkthdr_t)); 93 if (ph == NULL) { 94 log_err("%s() failed: %m", __func__); 95 return NULL; 96 } 97 98 ph->data = pkt; 99 pkt->refcnt++; 100 101 return ph; 102 } 103 104 void 105 pkthdr_free(pkthdr_t *ph) 106 { 107 108 packet_free(ph->data); 109 free(ph); 110 } 111