1/*-
2 * bt3cfw.c
3 *
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 *
6 * Copyright (c) 2001 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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 AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * $Id: bt3cfw.c,v 1.2 2003/05/21 22:40:29 max Exp $
31 * $FreeBSD: stable/11/usr.sbin/bluetooth/bt3cfw/bt3cfw.c 330449 2018-03-05 07:26:05Z eadler $
32 */
33
34#include <sys/types.h>
35#include <errno.h>
36#include <netgraph.h>
37#include <netgraph/bluetooth/include/ng_bt3c.h>
38#include <stdarg.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <syslog.h>
43#include <unistd.h>
44
45#define BT3CFW_IDENT			"bt3cfw"
46#define BT3CFW_MAX_FIRMWARE_SIZE	0xffff
47
48/* Convert hex ASCII to int4 */
49static int
50hexa2int4(const char *a)
51{
52	if ('0' <= *a && *a <= '9')
53		return (*a - '0');
54
55	if ('A' <= *a && *a <= 'F')
56		return (*a - 'A' + 0xa);
57
58	if ('a' <= *a && *a <= 'f')
59		return (*a - 'a' + 0xa);
60
61	syslog(LOG_ERR, "Invalid hex character: '%c' (%#x)", *a, *a);
62	exit(255);
63}
64
65/* Convert hex ASCII to int8 */
66static int
67hexa2int8(const char *a)
68{
69	return ((hexa2int4(a) << 4) | hexa2int4(a + 1));
70}
71
72/* Convert hex ASCII to int16 */
73static int
74hexa2int16(const char *a)
75{
76	return ((hexa2int8(a) << 8) | hexa2int8(a + 2));
77}
78
79/* Convert hex ASCII to int32 */
80static int
81hexa2int32(const char *a)
82{
83	return ((hexa2int16(a) << 16) | hexa2int16(a + 4));
84}
85
86/* Display usage() and exit */
87static void
88usage(void)
89{
90	syslog(LOG_ERR, "Usage: %s -f FirmwareFile -n NodeName", BT3CFW_IDENT);
91	exit(255);
92}
93
94/* Main */
95int
96main(int argc, char *argv[])
97{
98	FILE	*firmware_file = NULL;
99	char	 buffer[80], path[NG_PATHSIZ],
100		*firmware_filename = NULL;
101	uint8_t	*firmware = NULL;
102	int	 firmware_size, opt, cs, ds;
103
104	memset(path, 0, sizeof(path));
105	openlog(BT3CFW_IDENT, LOG_NDELAY|LOG_PID|LOG_PERROR, LOG_USER);
106
107	while ((opt = getopt(argc, argv, "f:hn:")) != -1) {
108		switch (opt) {
109		case 'f':
110			firmware_filename = optarg;
111			break;
112
113		case 'n':
114			snprintf(path, sizeof(path), "%s:", optarg);
115			break;
116
117		case 'h':
118		default:
119			usage();
120			/* NOT REACHED */
121		}
122	}
123
124	if (firmware_filename == NULL || path[0] == 0)
125		usage();
126		/* NOT REACHED */
127
128	firmware = (uint8_t *) calloc(BT3CFW_MAX_FIRMWARE_SIZE,
129					sizeof(uint8_t));
130	if (firmware == NULL) {
131		syslog(LOG_ERR, "Could not allocate firmware buffer");
132		exit(255);
133	}
134
135	if ((firmware_file = fopen(firmware_filename, "r")) == NULL) {
136		syslog(LOG_ERR, "Could not open BT3C firmware file %s. %s (%d)",
137				firmware_filename, strerror(errno), errno);
138		exit(255);
139	}
140
141	firmware_size = 0;
142
143	while (fgets(buffer, sizeof(buffer), firmware_file)) {
144		int     i, size, address, cs, fcs;
145
146		size = hexa2int8(buffer + 2);
147		address = hexa2int32(buffer + 4);
148		fcs = hexa2int8(buffer + 2 + size * 2);
149
150		if (buffer[1] == '3') {
151			ng_bt3c_firmware_block_ep	*block = NULL;
152			uint16_t			*data = NULL;
153
154			block = (ng_bt3c_firmware_block_ep *)
155						(firmware + firmware_size);
156
157			firmware_size += sizeof(*block);
158			if (firmware_size >= BT3CFW_MAX_FIRMWARE_SIZE) {
159				syslog(LOG_ERR, "Could not add new firmware " \
160						"block. Firmware file %s is " \
161						"too big, firmware_size=%d",
162						firmware_filename,
163						firmware_size);
164				exit(255);
165			}
166
167			block->block_address = address;
168			block->block_size = (size - 4) / 2;
169			block->block_alignment = (block->block_size * 2) % 3;
170			if (block->block_alignment != 0)
171				block->block_alignment = 3 - block->block_alignment;
172
173			firmware_size += (block->block_size * 2);
174			firmware_size += block->block_alignment;
175			if (firmware_size >= BT3CFW_MAX_FIRMWARE_SIZE) {
176				syslog(LOG_ERR, "Could not add new firmware " \
177						"data. Firmware file %s is " \
178						"too big, firmware_size=%d",
179						firmware_filename,
180						firmware_size);
181				exit(255);
182			}
183
184			/* First part of the cheksum: size and address */
185			cs = 0;
186			for (i = 0; i < 5; i++)
187				cs += hexa2int8(buffer + 2 + i * 2);
188
189			/* Data + second part of the cheksum: data */
190			data = (uint16_t *)(block + 1);
191			for (i = 0; i < block->block_size; i++) {
192				data[i] = hexa2int16(buffer + (i * 4) + 12);
193				cs += (((data[i] & 0xff00) >> 8) & 0xff);
194				cs += (data[i] & 0x00ff);
195			}
196		} else
197			for (cs = 0, i = 0; i < size; i++)
198				cs += hexa2int8(buffer + 2 + i * 2);
199
200		if (((cs + fcs) & 0xff) != 0xff) {
201			syslog(LOG_ERR, "Invalid firmware file %s. Checksum " \
202					"error, cs=%#x, fcs=%#x, checksum=%#x",
203					firmware_filename, (cs & 0xff), fcs,
204					((cs + fcs) & 0xff));
205			exit(255);
206		}
207	}
208
209	/* Send firmware to the card */
210	if (NgMkSockNode(NULL, &cs, &ds) < 0) {
211		syslog(LOG_ERR, "Could not create Netgraph socket. %s (%d)",
212				strerror(errno), errno);
213		exit(255);
214	}
215
216	if (NgSendMsg(cs, path, NGM_BT3C_COOKIE,
217			NGM_BT3C_NODE_DOWNLOAD_FIRMWARE,
218			(void const *) firmware, firmware_size) < 0) {
219		syslog(LOG_ERR, "Could not send Netgraph message. %s (%d)",
220				strerror(errno), errno);
221		exit(255);
222	}
223
224	free(firmware);
225	firmware = NULL;
226	fclose(firmware_file);
227
228	return (0);
229}
230
231