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add att_dispatch to allow for independent implementations of ATT Client and ATT Server

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matthias.ringwald@gmail.com 2014-04-25 13:22:11 +00:00
parent e849b92165
commit c6d061e8ab
3 changed files with 159 additions and 4 deletions
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97
ble/att_dispatch.c Normal file
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@ -0,0 +1,97 @@
/*
* Copyright (C) 2011-2014 by Matthias Ringwald
*
* 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 MATTHIAS RINGWALD 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 MATTHIAS
* RINGWALD 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 btstack@ringwald.ch
*
*/
/**
* Dispatcher for independent implementation of ATT client and server
*/
#include "l2cap.h"
#include "att_dispatch.h"
#include "debug.h"
static void dummy_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size);
static btstack_packet_handler_t att_client_handler = &dummy_packet_handler;
static btstack_packet_handler_t att_server_handler = &dummy_packet_handler;
static void dummy_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){
}
static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){
switch (packet_type){
case ATT_DATA_PACKET: {
log_info("att_data_packet with opcode 0x%x", packet[0]);
uint8_t att_pdu_odd = packet[0] & 1;
if (att_pdu_odd){
// odd PDUs are sent from server to client
att_client_handler(packet_type, handle, packet, size);
} else {
// even PDUs are sent from client to server
att_server_handler(packet_type, handle, packet, size);
}
break;
}
default:
att_client_handler(packet_type, handle, packet, size);
att_server_handler(packet_type, handle, packet, size);
break;
}
}
/**
* @brief reset att dispatchter
* @param packet_hander for ATT client packets
*/
void att_dispatch_register_client(btstack_packet_handler_t packet_handler){
if (packet_handler == NULL){
packet_handler = dummy_packet_handler;
}
att_client_handler = packet_handler;
l2cap_register_fixed_channel(att_packet_handler, L2CAP_CID_ATTRIBUTE_PROTOCOL);
}
/**
* @brief reset att dispatchter
* @param packet_hander for ATT server packets
*/
void att_dispatch_register_server(btstack_packet_handler_t packet_handler){
if (packet_handler == NULL){
packet_handler = dummy_packet_handler;
}
att_server_handler = packet_handler;
l2cap_register_fixed_channel(att_packet_handler, L2CAP_CID_ATTRIBUTE_PROTOCOL);
}

58
ble/att_dispatch.h Normal file
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@ -0,0 +1,58 @@
/*
* Copyright (C) 2011-2014 by Matthias Ringwald
*
* 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 MATTHIAS RINGWALD 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 MATTHIAS
* RINGWALD 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 btstack@ringwald.ch
*
*/
/**
* Dispatcher for independent implementation of ATT client and server
*/
#ifndef __ATT_DISPATCH_H
#define __ATT_DISPATCH_H
#include <btstack/btstack.h>
/**
* @brief reset att dispatchter
* @param packet_hander for ATT client packets
*/
void att_dispatch_register_client(btstack_packet_handler_t packet_handler);
/**
* @brief reset att dispatchter
* @param packet_hander for ATT server packets
*/
void att_dispatch_register_server(btstack_packet_handler_t packet_handler);
#endif // __ATT_DISPATCH_H

8
ble/att_server.c
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@ -38,8 +38,6 @@
// ATT Server Globals
//
#include "att_server.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
@ -57,10 +55,12 @@
#include "sm.h"
#include "att.h"
#include "att_server.h"
#include "att_dispatch.h"
#include "gap_le.h"
#include "central_device_db.h"
#include "att_server.h"
static void att_run(void);
typedef enum {
@ -319,7 +319,7 @@ void att_server_init(uint8_t const * db, att_read_callback_t read_callback, att_
sm_register_packet_handler(att_event_packet_handler);
l2cap_register_fixed_channel(att_packet_handler, L2CAP_CID_ATTRIBUTE_PROTOCOL);
att_dispatch_register_server(att_packet_handler);
att_server_state = ATT_SERVER_IDLE;
att_set_db(db);