1
0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-01-28 18:32:41 +00:00
2021-11-02 09:31:00 +01:00

188 lines
6.6 KiB
C

/*
* Copyright (C) 2020 BlueKitchen GmbH
*
* 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.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH 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 BLUEKITCHEN
* GMBH 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.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define BTSTACK_FILE__ "hci_event.c"
/*
* hci_event.c
*/
#include "btstack_config.h"
#include "hci.h"
#include "hci_event.h"
#include "btstack_defines.h"
#include "btstack_debug.h"
#include <string.h>
/**
* construct HCI Event based on template
*
* Format:
* 1,2,3,4: one to four byte value
* H: HCI connection handle
* B: Bluetooth Baseband Address (BD_ADDR)
* D: 8 byte data block
* P: 16 byte data block.
* Q: 32 byte data block, e.g. for X and Y coordinates of P-256 public key
* J: 1-byte lenght of following variable-length data blob 'V'
* K: 1-byte length of following variable-length data blob 'V', length is not included in packet
* V: variable-length data blob of len provided in 'J' field
*/
uint16_t hci_event_create_from_template_and_arglist(uint8_t *hci_event_buffer, const hci_event_t *event, va_list argptr){
hci_event_buffer[0] = event->event_code;
uint16_t pos = 2;
// store subevent code if set
if (event->subevent_code != 0){
hci_event_buffer[pos++] = event->subevent_code;
}
const char *format = event->format;
uint16_t word;
uint32_t longword;
uint8_t * ptr;
uint16_t length_j = 0xffff;
while (*format) {
switch(*format) {
case '1': // 8 bit value
case '2': // 16 bit value
case 'H': // hci_handle
word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs
hci_event_buffer[pos++] = word & 0xff;
if (*format != '1') {
hci_event_buffer[pos++] = word >> 8;
}
break;
case '3':
case '4':
longword = va_arg(argptr, uint32_t);
// longword = va_arg(argptr, int);
hci_event_buffer[pos++] = longword;
hci_event_buffer[pos++] = longword >> 8;
hci_event_buffer[pos++] = longword >> 16;
if (*format == '4'){
hci_event_buffer[pos++] = longword >> 24;
}
break;
case 'B': // bt-addr
ptr = va_arg(argptr, uint8_t *);
hci_event_buffer[pos++] = ptr[5];
hci_event_buffer[pos++] = ptr[4];
hci_event_buffer[pos++] = ptr[3];
hci_event_buffer[pos++] = ptr[2];
hci_event_buffer[pos++] = ptr[1];
hci_event_buffer[pos++] = ptr[0];
break;
case 'D': // 8 byte data block
ptr = va_arg(argptr, uint8_t *);
(void)memcpy(&hci_event_buffer[pos], ptr, 8);
pos += 8;
break;
case 'P': // 16 byte block
ptr = va_arg(argptr, uint8_t *);
(void)memcpy(&hci_event_buffer[pos], ptr, 16);
pos += 16;
break;
case 'Q':
ptr = va_arg(argptr, uint8_t *);
reverse_bytes(ptr, &hci_event_buffer[pos], 32);
pos += 32;
break;
case 'J':
word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs
length_j = word & 0xff;
hci_event_buffer[pos++] = length_j;
break;
case 'K':
word = va_arg(argptr, int); // minimal va_arg is int: 2 bytes on 8+16 bit CPUs
length_j = word & 0xff;
break;
case 'V':
btstack_assert(length_j < 0x100);
ptr = va_arg(argptr, uint8_t *);
(void)memcpy(&hci_event_buffer[pos], ptr, length_j);
pos += length_j;
break;
default:
btstack_assert(false);
break;
}
format++;
};
hci_event_buffer[1] = pos - 2;
return pos;
}
uint16_t hci_event_create_from_template_and_arguments(uint8_t *hci_buffer, const hci_event_t *event, ...){
va_list argptr;
va_start(argptr, event);
uint16_t length = hci_event_create_from_template_and_arglist(hci_buffer, event, argptr);
va_end(argptr);
return length;
}
/* HCI Events */
const hci_event_t hci_event_hardware_error = {
HCI_EVENT_HARDWARE_ERROR, 0, "1"
};
const hci_event_t hci_event_transport_packet_sent = {
HCI_EVENT_TRANSPORT_PACKET_SENT, 0, ""
};
const hci_event_t hci_event_command_complete = {
HCI_EVENT_COMMAND_COMPLETE, 0, "121KV"
};
const hci_event_t hci_event_disconnection_complete = {
HCI_EVENT_DISCONNECTION_COMPLETE, 0, "1H1"
};
const hci_event_t hci_event_number_of_completed_packets_1 = {
HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS, 0, "1H2"
};
/* LE Subevents */
const hci_event_t hci_subevent_le_connection_complete = {
HCI_EVENT_LE_META, HCI_SUBEVENT_LE_CONNECTION_COMPLETE, "1H11B2221"
};