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 37 packet_t * 38 packet_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 58 void 59 packet_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 78 void 79 packet_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 89 pkthdr_t * 90 pkthdr_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 } 105 106 void 107 pkthdr_free(pkthdr_t *ph) 108 { 109 110 packet_free(ph->data); 111 free(ph); 112 } 113