freebsd-skq/usr.sbin/bluetooth/bthidd/parser.y
bapt 310ab6d7ff Fix world after byacc import:
- old yacc(1) use to magicially append stdlib.h, while new one don't
- new yacc(1) do declare yyparse by itself, fix redundant declaration of
  'yyparse'

Approved by:	des (mentor)
2012-05-22 16:33:10 +00:00

476 lines
9.8 KiB
Plaintext

%{
/*
* parser.y
*/
/*-
* Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: parser.y,v 1.7 2006/09/07 21:06:53 max Exp $
* $FreeBSD$
*/
#include <sys/queue.h>
#include <bluetooth.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <usbhid.h>
#ifndef BTHIDCONTROL
#include <stdarg.h>
#include <syslog.h>
#define SYSLOG syslog
#define LOGCRIT LOG_CRIT
#define LOGERR LOG_ERR
#define LOGWARNING LOG_WARNING
#define EOL
#else
#define SYSLOG fprintf
#define LOGCRIT stderr
#define LOGERR stderr
#define LOGWARNING stderr
#define EOL "\n"
#endif /* ndef BTHIDCONTROL */
#include "bthid_config.h"
int yylex (void);
void yyerror (char const *);
static int32_t check_hid_device(hid_device_p hid_device);
static void free_hid_device (hid_device_p hid_device);
extern FILE *yyin;
extern int yylineno;
char const *config_file = BTHIDD_CONFFILE;
char const *hids_file = BTHIDD_HIDSFILE;
static char buffer[1024];
static int32_t hid_descriptor_size;
static hid_device_t *hid_device = NULL;
static LIST_HEAD(, hid_device) hid_devices;
%}
%union {
bdaddr_t bdaddr;
int32_t num;
}
%token <bdaddr> T_BDADDRSTRING
%token <num> T_HEXBYTE
%token T_DEVICE T_BDADDR T_CONTROL_PSM T_INTERRUPT_PSM T_RECONNECT_INITIATE
%token T_BATTERY_POWER T_NORMALLY_CONNECTABLE T_HID_DESCRIPTOR
%token T_TRUE T_FALSE T_ERROR
%%
config: line
| config line
;
line: T_DEVICE
{
hid_device = (hid_device_t *) calloc(1, sizeof(*hid_device));
if (hid_device == NULL) {
SYSLOG(LOGCRIT, "Could not allocate new " \
"config entry" EOL);
YYABORT;
}
hid_device->new_device = 1;
}
'{' options '}'
{
if (check_hid_device(hid_device))
LIST_INSERT_HEAD(&hid_devices,hid_device,next);
else
free_hid_device(hid_device);
hid_device = NULL;
}
;
options: option ';'
| options option ';'
;
option: bdaddr
| control_psm
| interrupt_psm
| reconnect_initiate
| battery_power
| normally_connectable
| hid_descriptor
| parser_error
;
bdaddr: T_BDADDR T_BDADDRSTRING
{
memcpy(&hid_device->bdaddr, &$2, sizeof(hid_device->bdaddr));
}
;
control_psm: T_CONTROL_PSM T_HEXBYTE
{
hid_device->control_psm = $2;
}
;
interrupt_psm: T_INTERRUPT_PSM T_HEXBYTE
{
hid_device->interrupt_psm = $2;
}
;
reconnect_initiate: T_RECONNECT_INITIATE T_TRUE
{
hid_device->reconnect_initiate = 1;
}
| T_RECONNECT_INITIATE T_FALSE
{
hid_device->reconnect_initiate = 0;
}
;
battery_power: T_BATTERY_POWER T_TRUE
{
hid_device->battery_power = 1;
}
| T_BATTERY_POWER T_FALSE
{
hid_device->battery_power = 0;
}
;
normally_connectable: T_NORMALLY_CONNECTABLE T_TRUE
{
hid_device->normally_connectable = 1;
}
| T_NORMALLY_CONNECTABLE T_FALSE
{
hid_device->normally_connectable = 0;
}
;
hid_descriptor: T_HID_DESCRIPTOR
{
hid_descriptor_size = 0;
}
'{' hid_descriptor_bytes '}'
{
if (hid_device->desc != NULL)
hid_dispose_report_desc(hid_device->desc);
hid_device->desc = hid_use_report_desc((unsigned char *) buffer, hid_descriptor_size);
if (hid_device->desc == NULL) {
SYSLOG(LOGCRIT, "Could not use HID descriptor" EOL);
YYABORT;
}
}
;
hid_descriptor_bytes: hid_descriptor_byte
| hid_descriptor_bytes hid_descriptor_byte
;
hid_descriptor_byte: T_HEXBYTE
{
if (hid_descriptor_size >= (int32_t) sizeof(buffer)) {
SYSLOG(LOGCRIT, "HID descriptor is too big" EOL);
YYABORT;
}
buffer[hid_descriptor_size ++] = $1;
}
;
parser_error: T_ERROR
{
YYABORT;
}
%%
/* Display parser error message */
void
yyerror(char const *message)
{
SYSLOG(LOGERR, "%s in line %d" EOL, message, yylineno);
}
/* Re-read config file */
int32_t
read_config_file(void)
{
int32_t e;
if (config_file == NULL) {
SYSLOG(LOGERR, "Unknown config file name!" EOL);
return (-1);
}
if ((yyin = fopen(config_file, "r")) == NULL) {
SYSLOG(LOGERR, "Could not open config file '%s'. %s (%d)" EOL,
config_file, strerror(errno), errno);
return (-1);
}
clean_config();
if (yyparse() < 0) {
SYSLOG(LOGERR, "Could not parse config file '%s'" EOL,
config_file);
e = -1;
} else
e = 0;
fclose(yyin);
yyin = NULL;
return (e);
}
/* Clean config */
void
clean_config(void)
{
while (!LIST_EMPTY(&hid_devices)) {
hid_device_p d = LIST_FIRST(&hid_devices);
LIST_REMOVE(d, next);
free_hid_device(d);
}
}
/* Lookup config entry */
hid_device_p
get_hid_device(bdaddr_p bdaddr)
{
hid_device_p d;
LIST_FOREACH(d, &hid_devices, next)
if (memcmp(&d->bdaddr, bdaddr, sizeof(bdaddr_t)) == 0)
break;
return (d);
}
/* Get next config entry */
hid_device_p
get_next_hid_device(hid_device_p d)
{
return ((d == NULL)? LIST_FIRST(&hid_devices) : LIST_NEXT(d, next));
}
/* Print config entry */
void
print_hid_device(hid_device_p d, FILE *f)
{
/* XXX FIXME hack! */
struct report_desc {
unsigned int size;
unsigned char data[1];
};
/* XXX FIXME hack! */
struct report_desc *desc = (struct report_desc *) d->desc;
uint32_t i;
fprintf(f,
"device {\n" \
" bdaddr %s;\n" \
" control_psm 0x%x;\n" \
" interrupt_psm 0x%x;\n" \
" reconnect_initiate %s;\n" \
" battery_power %s;\n" \
" normally_connectable %s;\n" \
" hid_descriptor {",
bt_ntoa(&d->bdaddr, NULL),
d->control_psm, d->interrupt_psm,
d->reconnect_initiate? "true" : "false",
d->battery_power? "true" : "false",
d->normally_connectable? "true" : "false");
for (i = 0; i < desc->size; i ++) {
if ((i % 8) == 0)
fprintf(f, "\n ");
fprintf(f, "0x%2.2x ", desc->data[i]);
}
fprintf(f,
"\n" \
" };\n" \
"}\n");
}
/* Check config entry */
static int32_t
check_hid_device(hid_device_p d)
{
hid_data_t hd;
hid_item_t hi;
int32_t page;
if (get_hid_device(&d->bdaddr) != NULL) {
SYSLOG(LOGERR, "Ignoring duplicated entry for bdaddr %s" EOL,
bt_ntoa(&d->bdaddr, NULL));
return (0);
}
if (d->control_psm == 0) {
SYSLOG(LOGERR, "Ignoring entry with invalid control PSM" EOL);
return (0);
}
if (d->interrupt_psm == 0) {
SYSLOG(LOGERR, "Ignoring entry with invalid interrupt PSM" EOL);
return (0);
}
if (d->desc == NULL) {
SYSLOG(LOGERR, "Ignoring entry without HID descriptor" EOL);
return (0);
}
/* XXX somehow need to make sure descriptor is valid */
for (hd = hid_start_parse(d->desc, ~0, -1); hid_get_item(hd, &hi) > 0; ) {
switch (hi.kind) {
case hid_collection:
case hid_endcollection:
case hid_output:
case hid_feature:
break;
case hid_input:
/* Check if the device may send keystrokes */
page = HID_PAGE(hi.usage);
if (page == HUP_KEYBOARD)
d->keyboard = 1;
break;
}
}
hid_end_parse(hd);
return (1);
}
/* Free config entry */
static void
free_hid_device(hid_device_p d)
{
if (d->desc != NULL)
hid_dispose_report_desc(d->desc);
memset(d, 0, sizeof(*d));
free(d);
}
/* Re-read hids file */
int32_t
read_hids_file(void)
{
FILE *f;
hid_device_t *d;
char *line;
bdaddr_t bdaddr;
int32_t lineno;
if (hids_file == NULL) {
SYSLOG(LOGERR, "Unknown HIDs file name!" EOL);
return (-1);
}
if ((f = fopen(hids_file, "r")) == NULL) {
if (errno == ENOENT)
return (0);
SYSLOG(LOGERR, "Could not open HIDs file '%s'. %s (%d)" EOL,
hids_file, strerror(errno), errno);
return (-1);
}
for (lineno = 1; fgets(buffer, sizeof(buffer), f) != NULL; lineno ++) {
if ((line = strtok(buffer, "\r\n\t ")) == NULL)
continue; /* ignore empty lines */
if (!bt_aton(line, &bdaddr)) {
SYSLOG(LOGWARNING, "Ignoring unparseable BD_ADDR in " \
"%s:%d" EOL, hids_file, lineno);
continue;
}
if ((d = get_hid_device(&bdaddr)) != NULL)
d->new_device = 0;
}
fclose(f);
return (0);
}
/* Write hids file */
int32_t
write_hids_file(void)
{
char path[PATH_MAX];
FILE *f;
hid_device_t *d;
if (hids_file == NULL) {
SYSLOG(LOGERR, "Unknown HIDs file name!" EOL);
return (-1);
}
snprintf(path, sizeof(path), "%s.new", hids_file);
if ((f = fopen(path, "w")) == NULL) {
SYSLOG(LOGERR, "Could not open HIDs file '%s'. %s (%d)" EOL,
path, strerror(errno), errno);
return (-1);
}
LIST_FOREACH(d, &hid_devices, next)
if (!d->new_device)
fprintf(f, "%s\n", bt_ntoa(&d->bdaddr, NULL));
fclose(f);
if (rename(path, hids_file) < 0) {
SYSLOG(LOGERR, "Could not rename new HIDs file '%s' to '%s'. " \
"%s (%d)" EOL, path, hids_file, strerror(errno), errno);
unlink(path);
return (-1);
}
return (0);
}