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.
438 lines
9.0 KiB
Plaintext
438 lines
9.0 KiB
Plaintext
%{
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/*-
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* parser.y
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*
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: parser.y,v 1.5 2003/06/07 21:22:30 max Exp $
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* $FreeBSD$
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*/
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#include <sys/fcntl.h>
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#include <sys/queue.h>
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#define L2CAP_SOCKET_CHECKED
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#include <bluetooth.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include "hcsecd.h"
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int yyparse (void);
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int yylex (void);
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static void free_key (link_key_p key);
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static int hexa2int4(char *a);
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static int hexa2int8(char *a);
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extern int yylineno;
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static LIST_HEAD(, link_key) link_keys;
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char *config_file = "/etc/bluetooth/hcsecd.conf";
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static link_key_p key = NULL;
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%}
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%union {
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char *string;
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}
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%token <string> T_BDADDRSTRING T_HEXSTRING T_STRING
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%token T_DEVICE T_BDADDR T_NAME T_KEY T_PIN T_NOKEY T_NOPIN T_JUNK
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%%
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config: line
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| config line
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;
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line: T_DEVICE
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{
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key = (link_key_p) malloc(sizeof(*key));
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if (key == NULL) {
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syslog(LOG_ERR, "Could not allocate new " \
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"config entry");
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exit(1);
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}
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memset(key, 0, sizeof(*key));
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}
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'{' options '}'
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{
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if (get_key(&key->bdaddr, 1) != NULL) {
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syslog(LOG_ERR, "Ignoring duplicated entry " \
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"for bdaddr %s",
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bt_ntoa(&key->bdaddr, NULL));
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free_key(key);
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} else
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LIST_INSERT_HEAD(&link_keys, key, next);
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key = NULL;
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}
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;
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options: option ';'
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| options option ';'
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;
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option: bdaddr
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| name
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| key
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| pin
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;
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bdaddr: T_BDADDR T_BDADDRSTRING
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{
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if (!bt_aton($2, &key->bdaddr)) {
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syslog(LOG_ERR, "Cound not parse BD_ADDR " \
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"'%s'", $2);
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exit(1);
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}
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}
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;
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name: T_NAME T_STRING
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{
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if (key->name != NULL)
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free(key->name);
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key->name = strdup($2);
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if (key->name == NULL) {
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syslog(LOG_ERR, "Could not allocate new " \
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"device name");
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exit(1);
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}
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}
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;
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key: T_KEY T_HEXSTRING
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{
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int i, len;
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if (key->key != NULL)
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free(key->key);
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key->key = (uint8_t *) malloc(NG_HCI_KEY_SIZE);
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if (key->key == NULL) {
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syslog(LOG_ERR, "Could not allocate new " \
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"link key");
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exit(1);
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}
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memset(key->key, 0, NG_HCI_KEY_SIZE);
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len = strlen($2) / 2;
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if (len > NG_HCI_KEY_SIZE)
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len = NG_HCI_KEY_SIZE;
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for (i = 0; i < len; i ++)
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key->key[i] = hexa2int8((char *)($2) + 2*i);
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}
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| T_KEY T_NOKEY
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{
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if (key->key != NULL)
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free(key->key);
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key->key = NULL;
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}
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;
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pin: T_PIN T_STRING
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{
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if (key->pin != NULL)
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free(key->pin);
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key->pin = strdup($2);
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if (key->pin == NULL) {
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syslog(LOG_ERR, "Could not allocate new " \
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"PIN code");
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exit(1);
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}
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}
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| T_PIN T_NOPIN
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{
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if (key->pin != NULL)
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free(key->pin);
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key->pin = NULL;
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}
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;
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%%
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/* Display parser error message */
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void
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yyerror(char const *message)
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{
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syslog(LOG_ERR, "%s in line %d", message, yylineno);
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}
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/* Re-read config file */
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void
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read_config_file(void)
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{
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extern FILE *yyin;
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if (config_file == NULL) {
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syslog(LOG_ERR, "Unknown config file name!");
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exit(1);
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}
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if ((yyin = fopen(config_file, "r")) == NULL) {
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syslog(LOG_ERR, "Could not open config file '%s'. %s (%d)",
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config_file, strerror(errno), errno);
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exit(1);
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}
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clean_config();
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if (yyparse() < 0) {
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syslog(LOG_ERR, "Could not parse config file '%s'",config_file);
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exit(1);
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}
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fclose(yyin);
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yyin = NULL;
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#if __config_debug__
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dump_config();
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#endif
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}
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/* Clean config */
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void
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clean_config(void)
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{
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link_key_p key = NULL;
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while ((key = LIST_FIRST(&link_keys)) != NULL) {
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LIST_REMOVE(key, next);
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free_key(key);
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}
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}
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/* Find link key entry in the list. Return exact or default match */
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link_key_p
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get_key(bdaddr_p bdaddr, int exact_match)
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{
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link_key_p key = NULL, defkey = NULL;
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LIST_FOREACH(key, &link_keys, next) {
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if (memcmp(bdaddr, &key->bdaddr, sizeof(key->bdaddr)) == 0)
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break;
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if (!exact_match)
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if (memcmp(NG_HCI_BDADDR_ANY, &key->bdaddr,
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sizeof(key->bdaddr)) == 0)
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defkey = key;
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}
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return ((key != NULL)? key : defkey);
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}
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#if __config_debug__
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/* Dump config */
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void
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dump_config(void)
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{
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link_key_p key = NULL;
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char buffer[64];
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LIST_FOREACH(key, &link_keys, next) {
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if (key->key != NULL)
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snprintf(buffer, sizeof(buffer),
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"0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
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key->key[0], key->key[1], key->key[2],
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key->key[3], key->key[4], key->key[5],
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key->key[6], key->key[7], key->key[8],
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key->key[9], key->key[10], key->key[11],
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key->key[12], key->key[13], key->key[14],
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key->key[15]);
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syslog(LOG_DEBUG,
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"device %s " \
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"bdaddr %s " \
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"pin %s " \
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"key %s",
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(key->name != NULL)? key->name : "noname",
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bt_ntoa(&key->bdaddr, NULL),
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(key->pin != NULL)? key->pin : "nopin",
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(key->key != NULL)? buffer : "nokey");
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}
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}
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#endif
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/* Read keys file */
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int
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read_keys_file(void)
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{
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FILE *f = NULL;
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link_key_t *key = NULL;
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char buf[HCSECD_BUFFER_SIZE], *p = NULL, *cp = NULL;
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bdaddr_t bdaddr;
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int i, len;
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if ((f = fopen(HCSECD_KEYSFILE, "r")) == NULL) {
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if (errno == ENOENT)
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return (0);
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syslog(LOG_ERR, "Could not open keys file %s. %s (%d)\n",
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HCSECD_KEYSFILE, strerror(errno), errno);
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return (-1);
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}
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while ((p = fgets(buf, sizeof(buf), f)) != NULL) {
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if (*p == '#')
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continue;
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if ((cp = strpbrk(p, " ")) == NULL)
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continue;
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*cp++ = '\0';
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if (!bt_aton(p, &bdaddr))
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continue;
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if ((key = get_key(&bdaddr, 1)) == NULL)
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continue;
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if (key->key == NULL) {
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key->key = (uint8_t *) malloc(NG_HCI_KEY_SIZE);
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if (key->key == NULL) {
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syslog(LOG_ERR, "Could not allocate link key");
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exit(1);
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}
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}
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memset(key->key, 0, NG_HCI_KEY_SIZE);
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len = strlen(cp) / 2;
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if (len > NG_HCI_KEY_SIZE)
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len = NG_HCI_KEY_SIZE;
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for (i = 0; i < len; i ++)
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key->key[i] = hexa2int8(cp + 2*i);
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syslog(LOG_DEBUG, "Restored link key for the entry, " \
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"remote bdaddr %s, name '%s'",
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bt_ntoa(&key->bdaddr, NULL),
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(key->name != NULL)? key->name : "No name");
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}
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fclose(f);
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return (0);
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}
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/* Dump keys file */
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int
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dump_keys_file(void)
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{
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link_key_p key = NULL;
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char tmp[PATH_MAX], buf[HCSECD_BUFFER_SIZE];
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int f;
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snprintf(tmp, sizeof(tmp), "%s.tmp", HCSECD_KEYSFILE);
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if ((f = open(tmp, O_RDWR|O_CREAT|O_TRUNC|O_EXCL, 0600)) < 0) {
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syslog(LOG_ERR, "Could not create temp keys file %s. %s (%d)\n",
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tmp, strerror(errno), errno);
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return (-1);
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}
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LIST_FOREACH(key, &link_keys, next) {
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if (key->key == NULL)
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continue;
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snprintf(buf, sizeof(buf),
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"%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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bt_ntoa(&key->bdaddr, NULL),
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key->key[0], key->key[1], key->key[2], key->key[3],
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key->key[4], key->key[5], key->key[6], key->key[7],
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key->key[8], key->key[9], key->key[10], key->key[11],
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key->key[12], key->key[13], key->key[14], key->key[15]);
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if (write(f, buf, strlen(buf)) < 0) {
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syslog(LOG_ERR, "Could not write temp keys file. " \
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"%s (%d)\n", strerror(errno), errno);
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break;
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}
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}
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close(f);
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if (rename(tmp, HCSECD_KEYSFILE) < 0) {
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syslog(LOG_ERR, "Could not rename(%s, %s). %s (%d)\n",
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tmp, HCSECD_KEYSFILE, strerror(errno), errno);
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unlink(tmp);
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return (-1);
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}
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return (0);
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}
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/* Free key entry */
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static void
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free_key(link_key_p key)
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{
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if (key->name != NULL)
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free(key->name);
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if (key->key != NULL)
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free(key->key);
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if (key->pin != NULL)
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free(key->pin);
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memset(key, 0, sizeof(*key));
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free(key);
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}
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/* Convert hex ASCII to int4 */
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static int
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hexa2int4(char *a)
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{
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if ('0' <= *a && *a <= '9')
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return (*a - '0');
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if ('A' <= *a && *a <= 'F')
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return (*a - 'A' + 0xa);
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if ('a' <= *a && *a <= 'f')
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return (*a - 'a' + 0xa);
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syslog(LOG_ERR, "Invalid hex character: '%c' (%#x)", *a, *a);
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exit(1);
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}
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/* Convert hex ASCII to int8 */
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static int
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hexa2int8(char *a)
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{
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return ((hexa2int4(a) << 4) | hexa2int4(a + 1));
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}
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