1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
759 lines
16 KiB
C
759 lines
16 KiB
C
/* $NetBSD: bnep.c,v 1.1 2008/08/17 13:20:57 plunky Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-NetBSD
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*
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* Copyright (c) 2008 Iain Hibbert
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $FreeBSD$ */
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: bnep.c,v 1.1 2008/08/17 13:20:57 plunky Exp $");
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#include <sys/uio.h>
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#define L2CAP_SOCKET_CHECKED
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#include <bluetooth.h>
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#include <sdp.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include "btpand.h"
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#include "bnep.h"
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static bool bnep_recv_extension(packet_t *);
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static size_t bnep_recv_control(channel_t *, uint8_t *, size_t, bool);
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static size_t bnep_recv_control_command_not_understood(channel_t *, uint8_t *, size_t);
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static size_t bnep_recv_setup_connection_req(channel_t *, uint8_t *, size_t);
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static size_t bnep_recv_setup_connection_rsp(channel_t *, uint8_t *, size_t);
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static size_t bnep_recv_filter_net_type_set(channel_t *, uint8_t *, size_t);
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static size_t bnep_recv_filter_net_type_rsp(channel_t *, uint8_t *, size_t);
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static size_t bnep_recv_filter_multi_addr_set(channel_t *, uint8_t *, size_t);
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static size_t bnep_recv_filter_multi_addr_rsp(channel_t *, uint8_t *, size_t);
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static bool bnep_pfilter(channel_t *, packet_t *);
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static bool bnep_mfilter(channel_t *, packet_t *);
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static uint8_t NAP_UUID[] = {
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0x00, 0x00, 0x11, 0x16,
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0x00, 0x00,
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0x10, 0x00,
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0x80, 0x00,
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0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb
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};
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static uint8_t GN_UUID[] = {
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0x00, 0x00, 0x11, 0x17,
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0x00, 0x00,
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0x10, 0x00,
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0x80, 0x00,
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0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb,
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};
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static uint8_t PANU_UUID[] = {
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0x00, 0x00, 0x11, 0x15,
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0x00, 0x00,
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0x10, 0x00,
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0x80, 0x00,
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0x00, 0x80, 0x5f, 0x9b, 0x34, 0xfb
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};
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/*
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* receive BNEP packet
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* return true if packet is to be forwarded
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*/
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bool
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bnep_recv(packet_t *pkt)
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{
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size_t len;
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uint8_t type;
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if (pkt->len < 1)
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return false;
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type = pkt->ptr[0];
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packet_adj(pkt, 1);
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switch (BNEP_TYPE(type)) {
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case BNEP_GENERAL_ETHERNET:
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if (pkt->len < (ETHER_ADDR_LEN * 2) + ETHER_TYPE_LEN) {
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log_debug("dropped short packet (type 0x%2.2x)", type);
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return false;
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}
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pkt->dst = pkt->ptr;
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packet_adj(pkt, ETHER_ADDR_LEN);
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pkt->src = pkt->ptr;
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packet_adj(pkt, ETHER_ADDR_LEN);
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pkt->type = pkt->ptr;
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packet_adj(pkt, ETHER_TYPE_LEN);
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break;
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case BNEP_CONTROL:
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len = bnep_recv_control(pkt->chan, pkt->ptr, pkt->len, false);
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if (len == 0)
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return false;
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packet_adj(pkt, len);
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break;
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case BNEP_COMPRESSED_ETHERNET:
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if (pkt->len < ETHER_TYPE_LEN) {
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log_debug("dropped short packet (type 0x%2.2x)", type);
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return false;
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}
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pkt->dst = pkt->chan->laddr;
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pkt->src = pkt->chan->raddr;
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pkt->type = pkt->ptr;
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packet_adj(pkt, ETHER_TYPE_LEN);
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break;
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case BNEP_COMPRESSED_ETHERNET_SRC_ONLY:
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if (pkt->len < ETHER_ADDR_LEN + ETHER_TYPE_LEN) {
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log_debug("dropped short packet (type 0x%2.2x)", type);
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return false;
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}
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pkt->dst = pkt->chan->laddr;
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pkt->src = pkt->ptr;
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packet_adj(pkt, ETHER_ADDR_LEN);
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pkt->type = pkt->ptr;
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packet_adj(pkt, ETHER_TYPE_LEN);
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break;
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case BNEP_COMPRESSED_ETHERNET_DST_ONLY:
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if (pkt->len < ETHER_ADDR_LEN + ETHER_TYPE_LEN) {
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log_debug("dropped short packet (type 0x%2.2x)", type);
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return false;
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}
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pkt->dst = pkt->ptr;
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packet_adj(pkt, ETHER_ADDR_LEN);
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pkt->src = pkt->chan->raddr;
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pkt->type = pkt->ptr;
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packet_adj(pkt, ETHER_TYPE_LEN);
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break;
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default:
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/*
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* Any packet containing a reserved BNEP
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* header packet type SHALL be dropped.
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*/
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log_debug("dropped packet with reserved type 0x%2.2x", type);
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return false;
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}
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if (BNEP_TYPE_EXT(type)
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&& !bnep_recv_extension(pkt))
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return false; /* invalid extensions */
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if (BNEP_TYPE(type) == BNEP_CONTROL
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|| pkt->chan->state != CHANNEL_OPEN)
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return false; /* no forwarding */
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return true;
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}
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static bool
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bnep_recv_extension(packet_t *pkt)
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{
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exthdr_t *eh;
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size_t len, size;
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uint8_t type;
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do {
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if (pkt->len < 2)
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return false;
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type = pkt->ptr[0];
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size = pkt->ptr[1];
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if (pkt->len < size + 2)
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return false;
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switch (type) {
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case BNEP_EXTENSION_CONTROL:
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len = bnep_recv_control(pkt->chan, pkt->ptr + 2, size, true);
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if (len != size)
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log_err("ignored spurious data in exthdr");
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break;
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default:
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/* Unknown extension headers in data packets */
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/* SHALL be forwarded irrespective of any */
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/* network protocol or multicast filter settings */
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/* and any local filtering policy. */
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eh = malloc(sizeof(exthdr_t));
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if (eh == NULL) {
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log_err("exthdr malloc() failed: %m");
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break;
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}
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eh->ptr = pkt->ptr;
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eh->len = size;
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STAILQ_INSERT_TAIL(&pkt->extlist, eh, next);
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break;
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}
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packet_adj(pkt, size + 2);
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} while (BNEP_TYPE_EXT(type));
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return true;
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}
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static size_t
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bnep_recv_control(channel_t *chan, uint8_t *ptr, size_t size, bool isext)
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{
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uint8_t type;
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size_t len;
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if (size-- < 1)
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return 0;
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type = *ptr++;
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switch (type) {
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case BNEP_CONTROL_COMMAND_NOT_UNDERSTOOD:
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len = bnep_recv_control_command_not_understood(chan, ptr, size);
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break;
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case BNEP_SETUP_CONNECTION_REQUEST:
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if (isext)
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return 0; /* not allowed in extension headers */
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len = bnep_recv_setup_connection_req(chan, ptr, size);
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break;
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case BNEP_SETUP_CONNECTION_RESPONSE:
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if (isext)
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return 0; /* not allowed in extension headers */
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len = bnep_recv_setup_connection_rsp(chan, ptr, size);
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break;
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case BNEP_FILTER_NET_TYPE_SET:
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len = bnep_recv_filter_net_type_set(chan, ptr, size);
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break;
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case BNEP_FILTER_NET_TYPE_RESPONSE:
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len = bnep_recv_filter_net_type_rsp(chan, ptr, size);
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break;
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case BNEP_FILTER_MULTI_ADDR_SET:
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len = bnep_recv_filter_multi_addr_set(chan, ptr, size);
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break;
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case BNEP_FILTER_MULTI_ADDR_RESPONSE:
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len = bnep_recv_filter_multi_addr_rsp(chan, ptr, size);
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break;
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default:
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len = 0;
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break;
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}
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if (len == 0)
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bnep_send_control(chan, BNEP_CONTROL_COMMAND_NOT_UNDERSTOOD, type);
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return len;
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}
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static size_t
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bnep_recv_control_command_not_understood(channel_t *chan, uint8_t *ptr, size_t size)
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{
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uint8_t type;
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if (size < 1)
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return 0;
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type = *ptr++;
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log_err("received Control Command Not Understood (0x%2.2x)", type);
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/* we didn't send any reserved commands, just cut them off */
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channel_close(chan);
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return 1;
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}
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static size_t
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bnep_recv_setup_connection_req(channel_t *chan, uint8_t *ptr, size_t size)
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{
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uint8_t off;
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int src, dst, rsp;
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size_t len;
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if (size < 1)
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return 0;
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len = *ptr++;
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if (size < (len * 2 + 1))
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return 0;
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if (chan->state != CHANNEL_WAIT_CONNECT_REQ
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&& chan->state != CHANNEL_OPEN) {
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log_debug("ignored");
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return (len * 2 + 1);
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}
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if (len == 2)
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off = 2;
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else if (len == 4)
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off = 0;
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else if (len == 16)
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off = 0;
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else {
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rsp = BNEP_SETUP_INVALID_UUID_SIZE;
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goto done;
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}
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if (memcmp(ptr, NAP_UUID + off, len) == 0)
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dst = SDP_SERVICE_CLASS_NAP;
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else if (memcmp(ptr, GN_UUID + off, len) == 0)
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dst = SDP_SERVICE_CLASS_GN;
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else if (memcmp(ptr, PANU_UUID + off, len) == 0)
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dst = SDP_SERVICE_CLASS_PANU;
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else
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dst = 0;
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if (dst != service_class) {
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rsp = BNEP_SETUP_INVALID_DST_UUID;
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goto done;
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}
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ptr += len;
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if (memcmp(ptr, NAP_UUID + off, len) == 0)
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src = SDP_SERVICE_CLASS_NAP;
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else if (memcmp(ptr, GN_UUID + off, len) == 0)
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src = SDP_SERVICE_CLASS_GN;
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else if (memcmp(ptr, PANU_UUID + off, len) == 0)
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src = SDP_SERVICE_CLASS_PANU;
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else
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src = 0;
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if ((dst != SDP_SERVICE_CLASS_PANU && src != SDP_SERVICE_CLASS_PANU)
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|| src == 0) {
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rsp = BNEP_SETUP_INVALID_SRC_UUID;
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goto done;
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}
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rsp = BNEP_SETUP_SUCCESS;
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chan->state = CHANNEL_OPEN;
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channel_timeout(chan, 0);
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done:
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log_debug("addr %s response 0x%2.2x",
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ether_ntoa((struct ether_addr *)chan->raddr), rsp);
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bnep_send_control(chan, BNEP_SETUP_CONNECTION_RESPONSE, rsp);
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return (len * 2 + 1);
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}
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static size_t
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bnep_recv_setup_connection_rsp(channel_t *chan, uint8_t *ptr, size_t size)
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{
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int rsp;
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if (size < 2)
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return 0;
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rsp = be16dec(ptr);
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if (chan->state != CHANNEL_WAIT_CONNECT_RSP) {
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log_debug("ignored");
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return 2;
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}
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log_debug("addr %s response 0x%2.2x",
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ether_ntoa((struct ether_addr *)chan->raddr), rsp);
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if (rsp == BNEP_SETUP_SUCCESS) {
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chan->state = CHANNEL_OPEN;
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channel_timeout(chan, 0);
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} else {
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channel_close(chan);
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}
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return 2;
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}
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static size_t
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bnep_recv_filter_net_type_set(channel_t *chan, uint8_t *ptr, size_t size)
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{
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pfilter_t *pf;
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int i, nf, rsp;
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size_t len;
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if (size < 2)
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return 0;
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len = be16dec(ptr);
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ptr += 2;
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if (size < (len + 2))
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return 0;
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if (chan->state != CHANNEL_OPEN) {
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log_debug("ignored");
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return (len + 2);
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}
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nf = len / 4;
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pf = malloc(nf * sizeof(pfilter_t));
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if (pf == NULL) {
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rsp = BNEP_FILTER_TOO_MANY_FILTERS;
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goto done;
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}
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log_debug("nf = %d", nf);
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for (i = 0; i < nf; i++) {
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pf[i].start = be16dec(ptr);
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ptr += 2;
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pf[i].end = be16dec(ptr);
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ptr += 2;
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if (pf[i].start > pf[i].end) {
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free(pf);
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rsp = BNEP_FILTER_INVALID_RANGE;
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goto done;
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}
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log_debug("pf[%d] = %#4.4x, %#4.4x", i, pf[i].start, pf[i].end);
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}
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if (chan->pfilter)
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free(chan->pfilter);
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chan->pfilter = pf;
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chan->npfilter = nf;
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rsp = BNEP_FILTER_SUCCESS;
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done:
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log_debug("addr %s response 0x%2.2x",
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ether_ntoa((struct ether_addr *)chan->raddr), rsp);
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bnep_send_control(chan, BNEP_FILTER_NET_TYPE_RESPONSE, rsp);
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return (len + 2);
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}
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static size_t
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bnep_recv_filter_net_type_rsp(channel_t *chan, uint8_t *ptr, size_t size)
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{
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int rsp;
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if (size < 2)
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return 0;
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if (chan->state != CHANNEL_OPEN) {
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log_debug("ignored");
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return 2;
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}
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rsp = be16dec(ptr);
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log_debug("addr %s response 0x%2.2x",
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ether_ntoa((struct ether_addr *)chan->raddr), rsp);
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/* we did not send any filter_net_type_set message */
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return 2;
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}
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static size_t
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bnep_recv_filter_multi_addr_set(channel_t *chan, uint8_t *ptr, size_t size)
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{
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mfilter_t *mf;
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int i, nf, rsp;
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size_t len;
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if (size < 2)
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return 0;
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len = be16dec(ptr);
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ptr += 2;
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if (size < (len + 2))
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return 0;
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if (chan->state != CHANNEL_OPEN) {
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log_debug("ignored");
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return (len + 2);
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}
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nf = len / (ETHER_ADDR_LEN * 2);
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mf = malloc(nf * sizeof(mfilter_t));
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if (mf == NULL) {
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rsp = BNEP_FILTER_TOO_MANY_FILTERS;
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goto done;
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}
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log_debug("nf = %d", nf);
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for (i = 0; i < nf; i++) {
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memcpy(mf[i].start, ptr, ETHER_ADDR_LEN);
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ptr += ETHER_ADDR_LEN;
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memcpy(mf[i].end, ptr, ETHER_ADDR_LEN);
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ptr += ETHER_ADDR_LEN;
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|
|
if (memcmp(mf[i].start, mf[i].end, ETHER_ADDR_LEN) > 0) {
|
|
free(mf);
|
|
rsp = BNEP_FILTER_INVALID_RANGE;
|
|
goto done;
|
|
}
|
|
|
|
log_debug("pf[%d] = "
|
|
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x, "
|
|
"%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", i,
|
|
mf[i].start[0], mf[i].start[1], mf[i].start[2],
|
|
mf[i].start[3], mf[i].start[4], mf[i].start[5],
|
|
mf[i].end[0], mf[i].end[1], mf[i].end[2],
|
|
mf[i].end[3], mf[i].end[4], mf[i].end[5]);
|
|
}
|
|
|
|
if (chan->mfilter)
|
|
free(chan->mfilter);
|
|
|
|
chan->mfilter = mf;
|
|
chan->nmfilter = nf;
|
|
|
|
rsp = BNEP_FILTER_SUCCESS;
|
|
|
|
done:
|
|
log_debug("addr %s response 0x%2.2x",
|
|
ether_ntoa((struct ether_addr *)chan->raddr), rsp);
|
|
|
|
bnep_send_control(chan, BNEP_FILTER_MULTI_ADDR_RESPONSE, rsp);
|
|
return (len + 2);
|
|
}
|
|
|
|
static size_t
|
|
bnep_recv_filter_multi_addr_rsp(channel_t *chan, uint8_t *ptr, size_t size)
|
|
{
|
|
int rsp;
|
|
|
|
if (size < 2)
|
|
return false;
|
|
|
|
if (chan->state != CHANNEL_OPEN) {
|
|
log_debug("ignored");
|
|
return 2;
|
|
}
|
|
|
|
rsp = be16dec(ptr);
|
|
log_debug("addr %s response 0x%2.2x",
|
|
ether_ntoa((struct ether_addr *)chan->raddr), rsp);
|
|
|
|
/* we did not send any filter_multi_addr_set message */
|
|
return 2;
|
|
}
|
|
|
|
void
|
|
bnep_send_control(channel_t *chan, unsigned type, ...)
|
|
{
|
|
packet_t *pkt;
|
|
uint8_t *p;
|
|
va_list ap;
|
|
|
|
assert(chan->state != CHANNEL_CLOSED);
|
|
|
|
pkt = packet_alloc(chan);
|
|
if (pkt == NULL)
|
|
return;
|
|
|
|
p = pkt->ptr;
|
|
va_start(ap, type);
|
|
|
|
*p++ = BNEP_CONTROL;
|
|
*p++ = (uint8_t)type;
|
|
|
|
switch(type) {
|
|
case BNEP_CONTROL_COMMAND_NOT_UNDERSTOOD:
|
|
*p++ = va_arg(ap, int);
|
|
break;
|
|
|
|
case BNEP_SETUP_CONNECTION_REQUEST:
|
|
*p++ = va_arg(ap, int);
|
|
be16enc(p, va_arg(ap, int));
|
|
p += 2;
|
|
be16enc(p, va_arg(ap, int));
|
|
p += 2;
|
|
break;
|
|
|
|
case BNEP_SETUP_CONNECTION_RESPONSE:
|
|
case BNEP_FILTER_NET_TYPE_RESPONSE:
|
|
case BNEP_FILTER_MULTI_ADDR_RESPONSE:
|
|
be16enc(p, va_arg(ap, int));
|
|
p += 2;
|
|
break;
|
|
|
|
case BNEP_FILTER_NET_TYPE_SET: /* TODO */
|
|
case BNEP_FILTER_MULTI_ADDR_SET: /* TODO */
|
|
default:
|
|
log_err("Can't send control type 0x%2.2x", type);
|
|
break;
|
|
}
|
|
|
|
va_end(ap);
|
|
pkt->len = p - pkt->ptr;
|
|
|
|
channel_put(chan, pkt);
|
|
packet_free(pkt);
|
|
}
|
|
|
|
/*
|
|
* BNEP send packet routine
|
|
* return true if packet can be removed from queue
|
|
*/
|
|
bool
|
|
bnep_send(channel_t *chan, packet_t *pkt)
|
|
{
|
|
struct iovec iov[2];
|
|
uint8_t *p, *type, *proto;
|
|
exthdr_t *eh;
|
|
bool src, dst;
|
|
size_t nw;
|
|
|
|
if (pkt->type == NULL) {
|
|
iov[0].iov_base = pkt->ptr;
|
|
iov[0].iov_len = pkt->len;
|
|
iov[1].iov_base = NULL;
|
|
iov[1].iov_len = 0;
|
|
} else {
|
|
p = chan->sendbuf;
|
|
|
|
dst = (memcmp(pkt->dst, chan->raddr, ETHER_ADDR_LEN) != 0);
|
|
src = (memcmp(pkt->src, chan->laddr, ETHER_ADDR_LEN) != 0);
|
|
|
|
type = p;
|
|
p += 1;
|
|
|
|
if (dst && src)
|
|
*type = BNEP_GENERAL_ETHERNET;
|
|
else if (dst && !src)
|
|
*type = BNEP_COMPRESSED_ETHERNET_DST_ONLY;
|
|
else if (!dst && src)
|
|
*type = BNEP_COMPRESSED_ETHERNET_SRC_ONLY;
|
|
else /* (!dst && !src) */
|
|
*type = BNEP_COMPRESSED_ETHERNET;
|
|
|
|
if (dst) {
|
|
memcpy(p, pkt->dst, ETHER_ADDR_LEN);
|
|
p += ETHER_ADDR_LEN;
|
|
}
|
|
|
|
if (src) {
|
|
memcpy(p, pkt->src, ETHER_ADDR_LEN);
|
|
p += ETHER_ADDR_LEN;
|
|
}
|
|
|
|
proto = p;
|
|
memcpy(p, pkt->type, ETHER_TYPE_LEN);
|
|
p += ETHER_TYPE_LEN;
|
|
|
|
STAILQ_FOREACH(eh, &pkt->extlist, next) {
|
|
if (p + eh->len > chan->sendbuf + chan->mtu)
|
|
break;
|
|
|
|
*type |= BNEP_EXT;
|
|
type = p;
|
|
|
|
memcpy(p, eh->ptr, eh->len);
|
|
p += eh->len;
|
|
}
|
|
|
|
*type &= ~BNEP_EXT;
|
|
|
|
iov[0].iov_base = chan->sendbuf;
|
|
iov[0].iov_len = (p - chan->sendbuf);
|
|
|
|
if ((chan->npfilter == 0 || bnep_pfilter(chan, pkt))
|
|
&& (chan->nmfilter == 0 || bnep_mfilter(chan, pkt))) {
|
|
iov[1].iov_base = pkt->ptr;
|
|
iov[1].iov_len = pkt->len;
|
|
} else if (be16dec(proto) == ETHERTYPE_VLAN
|
|
&& pkt->len >= ETHER_VLAN_ENCAP_LEN) {
|
|
iov[1].iov_base = pkt->ptr;
|
|
iov[1].iov_len = ETHER_VLAN_ENCAP_LEN;
|
|
} else {
|
|
iov[1].iov_base = NULL;
|
|
iov[1].iov_len = 0;
|
|
memset(proto, 0, ETHER_TYPE_LEN);
|
|
}
|
|
}
|
|
|
|
if (iov[0].iov_len + iov[1].iov_len > chan->mtu) {
|
|
log_err("packet exceeded MTU (dropped)");
|
|
return false;
|
|
}
|
|
|
|
nw = writev(chan->fd, iov, __arraycount(iov));
|
|
return (nw > 0);
|
|
}
|
|
|
|
static bool
|
|
bnep_pfilter(channel_t *chan, packet_t *pkt)
|
|
{
|
|
int proto, i;
|
|
|
|
proto = be16dec(pkt->type);
|
|
if (proto == ETHERTYPE_VLAN) { /* IEEE 802.1Q tag header */
|
|
if (pkt->len < 4)
|
|
return false;
|
|
|
|
proto = be16dec(pkt->ptr + 2);
|
|
}
|
|
|
|
for (i = 0; i < chan->npfilter; i++) {
|
|
if (chan->pfilter[i].start <= proto
|
|
&& chan->pfilter[i].end >=proto)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
bnep_mfilter(channel_t *chan, packet_t *pkt)
|
|
{
|
|
int i;
|
|
|
|
if (!ETHER_IS_MULTICAST(pkt->dst))
|
|
return true;
|
|
|
|
for (i = 0; i < chan->nmfilter; i++) {
|
|
if (memcmp(pkt->dst, chan->mfilter[i].start, ETHER_ADDR_LEN) >= 0
|
|
&& memcmp(pkt->dst, chan->mfilter[i].end, ETHER_ADDR_LEN) <= 0)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|