[337] | 1 | /*
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| 2 | * Copyright (C) 2014 by Ole Reinhardt <ole.reinhardt@kernelconcepts.de>
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the copyright holders nor the names of
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| 14 | * contributors may be used to endorse or promote products derived
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| 15 | * from this software without specific prior written permission.
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| 16 | * 4. Any redistribution, use, or modification is done solely for
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| 17 | * personal benefit and not for any commercial purpose or for
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| 18 | * monetary gain.
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| 19 | *
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 23 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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| 24 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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| 26 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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| 27 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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| 28 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 29 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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| 30 | * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | *
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| 33 | * Please inquire about commercial licensing options at btstack@ringwald.ch
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | /*
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| 38 | * BNEP.h
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| 39 | */
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| 40 |
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| 41 | #ifndef __BNEP_H
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| 42 | #define __BNEP_H
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| 43 |
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| 44 | #include <btstack/btstack.h>
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| 45 | #include <btstack/utils.h>
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| 46 |
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| 47 | #include <stdint.h>
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| 48 |
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| 49 | #if defined __cplusplus
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| 50 | extern "C" {
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| 51 | #endif
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| 52 |
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| 53 | #ifndef ETHER_ADDR_LEN
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| 54 | #define ETHER_ADDR_LEN sizeof(bd_addr_t)
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| 55 | #endif
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| 56 |
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| 57 | #ifndef ETHERTYPE_VLAN
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| 58 | #define ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tag */
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| 59 | #endif
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| 60 |
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| 61 | #define BNEP_MTU_MIN 1691
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| 62 |
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| 63 | #define MAX_BNEP_NETFILTER 8
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| 64 | #define MAX_BNEP_MULTICAST_FILTER 8
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| 65 | #define MAX_BNEP_NETFILTER_OUT 421
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| 66 | #define MAX_BNEP_MULTICAST_FULTER_OUT 140
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| 67 |
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| 68 | #define BNEP_EXT_FLAG 0x80
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| 69 | #define BNEP_TYPE_MASK 0x7F
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| 70 | #define BNEP_TYPE(header) ((header) & BNEP_TYPE_MASK)
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| 71 | #define BNEP_HEADER_HAS_EXT(x) (((x) & BNEP_EXT_FLAG) == BNEP_EXT_FLAG)
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| 72 |
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| 73 | /* BNEP UUIDs */
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[374] | 74 | #define BLUETOOTH_SERVICE_CLASS_PANU 0x1115
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| 75 | #define BLUETOOTH_SERVICE_CLASS_NAP 0x1116
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| 76 | #define BLUETOOTH_SERVICE_CLASS_GN 0x1117
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[337] | 77 |
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| 78 | /* BNEP packet types */
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| 79 | #define BNEP_PKT_TYPE_GENERAL_ETHERNET 0x00
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| 80 | #define BNEP_PKT_TYPE_CONTROL 0x01
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| 81 | #define BNEP_PKT_TYPE_COMPRESSED_ETHERNET 0x02
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| 82 | #define BNEP_PKT_TYPE_COMPRESSED_ETHERNET_SOURCE_ONLY 0x03
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| 83 | #define BNEP_PKT_TYPE_COMPRESSED_ETHERNET_DEST_ONLY 0x04
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| 84 |
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| 85 | /* BNEP control types */
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| 86 | #define BNEP_CONTROL_TYPE_COMMAND_NOT_UNDERSTOOD 0x00
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| 87 | #define BNEP_CONTROL_TYPE_SETUP_CONNECTION_REQUEST 0x01
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| 88 | #define BNEP_CONTROL_TYPE_SETUP_CONNECTION_RESPONSE 0x02
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| 89 | #define BNEP_CONTROL_TYPE_FILTER_NET_TYPE_SET 0x03
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| 90 | #define BNEP_CONTROL_TYPE_FILTER_NET_TYPE_RESPONSE 0x04
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| 91 | #define BNEP_CONTROL_TYPE_FILTER_MULTI_ADDR_SET 0x05
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| 92 | #define BNEP_CONTROL_TYPE_FILTER_MULTI_ADDR_RESPONSE 0x06
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| 93 |
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| 94 | /* BNEP extension header types */
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| 95 | #define BNEP_EXT_HEADER_TYPE_EXTENSION_CONTROL 0x00
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| 96 |
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| 97 | /* BNEP setup response codes */
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| 98 | #define BNEP_RESP_SETUP_SUCCESS 0x0000
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| 99 | #define BNEP_RESP_SETUP_INVALID_DEST_UUID 0x0001
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| 100 | #define BNEP_RESP_SETUP_INVALID_SOURCE_UUID 0x0002
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| 101 | #define BNEP_RESP_SETUP_INVALID_SERVICE_UUID_SIZE 0x0003
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| 102 | #define BNEP_RESP_SETUP_CONNECTION_NOT_ALLOWED 0x0004
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| 103 |
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| 104 | /* BNEP filter response codes */
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| 105 | #define BNEP_RESP_FILTER_SUCCESS 0x0000
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| 106 | #define BNEP_RESP_FILTER_UNSUPPORTED_REQUEST 0x0001
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| 107 | #define BNEP_RESP_FILTER_ERR_INVALID_RANGE 0x0002
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| 108 | #define BNEP_RESP_FILTER_ERR_TOO_MANY_FILTERS 0x0003
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| 109 | #define BNEP_RESP_FILTER_ERR_SECURITY 0x0004
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| 110 |
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| 111 | typedef enum {
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| 112 | BNEP_CHANNEL_STATE_CLOSED = 1,
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| 113 | BNEP_CHANNEL_STATE_WAIT_FOR_CONNECTION_REQUEST,
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| 114 | BNEP_CHANNEL_STATE_WAIT_FOR_CONNECTION_RESPONSE,
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| 115 | BNEP_CHANNEL_STATE_CONNECTED,
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| 116 | } BNEP_CHANNEL_STATE;
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| 117 |
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| 118 | typedef enum {
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| 119 | BNEP_CHANNEL_STATE_VAR_NONE = 0,
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| 120 | BNEP_CHANNEL_STATE_VAR_SND_NOT_UNDERSTOOD = 1 << 0,
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| 121 | BNEP_CHANNEL_STATE_VAR_SND_CONNECTION_REQUEST = 1 << 1,
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| 122 | BNEP_CHANNEL_STATE_VAR_SND_CONNECTION_RESPONSE = 1 << 2,
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| 123 | BNEP_CHANNEL_STATE_VAR_SND_FILTER_NET_TYPE_SET = 1 << 3,
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| 124 | BNEP_CHANNEL_STATE_VAR_SND_FILTER_NET_TYPE_RESPONSE = 1 << 4,
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| 125 | BNEP_CHANNEL_STATE_VAR_SND_FILTER_MULTI_ADDR_SET = 1 << 5,
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| 126 | BNEP_CHANNEL_STATE_VAR_SND_FILTER_MULTI_ADDR_RESPONSE = 1 << 6,
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| 127 | } BNEP_CHANNEL_STATE_VAR;
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| 128 |
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| 129 | typedef enum {
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| 130 | BNEP_CH_EVT_READY_TO_SEND,
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| 131 | } BNEP_CHANNEL_EVENT;
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| 132 |
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| 133 | typedef struct bnep_channel_event {
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| 134 | BNEP_CHANNEL_EVENT type;
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| 135 | } bnep_channel_event_t;
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| 136 |
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| 137 | /* network protocol type filter */
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| 138 | typedef struct {
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| 139 | uint16_t range_start;
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| 140 | uint16_t range_end;
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| 141 | } bnep_net_filter_t;
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| 142 |
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| 143 | /* multicast address filter */
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| 144 | typedef struct {
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| 145 | uint8_t addr_start[ETHER_ADDR_LEN];
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| 146 | uint8_t addr_end[ETHER_ADDR_LEN];
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| 147 | } bnep_multi_filter_t;
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| 148 |
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| 149 |
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| 150 | // info regarding multiplexer
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| 151 | // note: spec mandates single multplexer per device combination
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| 152 | typedef struct {
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| 153 | // linked list - assert: first field
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| 154 | linked_item_t item;
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| 155 |
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| 156 | BNEP_CHANNEL_STATE state; // Channel state
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| 157 |
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| 158 | BNEP_CHANNEL_STATE_VAR state_var; // State flag variable. Needed for asynchronous packet sending
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| 159 |
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| 160 | uint16_t max_frame_size; // incomming max. frame size
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| 161 | void *connection; // client connection
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| 162 | bd_addr_t local_addr; // locale drvice address
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| 163 | bd_addr_t remote_addr; // remote device address
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| 164 | uint16_t l2cap_cid; // l2cap channel id
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| 165 | hci_con_handle_t con_handle; // hci connection handle
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| 166 |
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| 167 | uint16_t uuid_source; // Source UUID
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| 168 | uint16_t uuid_dest; // Destination UUID
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| 169 |
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| 170 | uint8_t last_control_type; // type of last control package
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| 171 | uint16_t response_code; // response code of last action (temp. storage for state machine)
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| 172 |
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| 173 | bnep_net_filter_t net_filter[MAX_BNEP_NETFILTER]; // network protocol filter, define fixed size for now
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| 174 | uint16_t net_filter_count;
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| 175 |
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| 176 | bnep_net_filter_t *net_filter_out; // outgoint network protocol filter, must be statically allocated in the application
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| 177 | uint16_t net_filter_out_count;
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| 178 |
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| 179 | bnep_multi_filter_t multicast_filter[MAX_BNEP_MULTICAST_FILTER]; // multicast address filter, define fixed size for now
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| 180 | uint16_t multicast_filter_count;
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| 181 |
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| 182 | bnep_multi_filter_t *multicast_filter_out; // outgoing multicast address filter, must be statically allocated in the application
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| 183 | uint16_t multicast_filter_out_count;
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| 184 |
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| 185 |
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| 186 | timer_source_t timer; // Timeout timer
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| 187 | int timer_active; // Is a timer running?
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| 188 | int retry_count; // number of retries for CONTROL SETUP MSG
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| 189 | // l2cap packet handler
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| 190 | btstack_packet_handler_t packet_handler;
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| 191 | } bnep_channel_t;
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| 192 |
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| 193 | /* Internal BNEP service descriptor */
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| 194 | typedef struct {
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| 195 | linked_item_t item; // linked list - assert: first field
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| 196 | void *connection; // client connection
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| 197 | uint16_t service_uuid; // Service class: PANU, NAP, GN
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| 198 | uint16_t max_frame_size; // incomming max. frame size
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| 199 |
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| 200 | // internal connection
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| 201 | btstack_packet_handler_t packet_handler;
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| 202 | } bnep_service_t;
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| 203 |
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| 204 |
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| 205 | void bnep_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
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| 206 |
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| 207 | /** Embedded API **/
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| 208 |
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| 209 | /* Set up BNEP. */
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| 210 | void bnep_init(void);
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| 211 |
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| 212 | /* Check if a data packet can be send out */
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| 213 | int bnep_can_send_packet_now(uint16_t bnep_cid);
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| 214 |
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| 215 | /* Send a data packet */
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| 216 | int bnep_send(uint16_t bnep_cid, uint8_t *packet, uint16_t len);
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| 217 |
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| 218 | /* Set the network protocol filter */
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| 219 | int bnep_set_net_type_filter(uint16_t bnep_cid, bnep_net_filter_t *filter, uint16_t len);
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| 220 |
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| 221 | /* Set the multicast address filter */
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| 222 | int bnep_set_multicast_filter(uint16_t bnep_cid, bnep_multi_filter_t *filter, uint16_t len);
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| 223 |
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| 224 | /* Set security level required for incoming connections, need to be called before registering services */
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| 225 | void bnep_set_required_security_level(gap_security_level_t security_level);
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| 226 |
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| 227 | /* Register packet handler. */
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| 228 | void bnep_register_packet_handler(void (*handler)(void * connection, uint8_t packet_type,
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| 229 | uint16_t channel, uint8_t *packet, uint16_t size));
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| 230 |
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| 231 | // Creates BNEP connection (channel) to a given server on a remote device with baseband address. A new baseband connection will be initiated if necessary.
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| 232 | int bnep_connect(void * connection, bd_addr_t *addr, uint16_t l2cap_psm, uint16_t uuid_dest);
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| 233 |
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| 234 | // Disconencts BNEP channel with given identifier.
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| 235 | void bnep_disconnect(bd_addr_t *addr);
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| 236 |
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| 237 | // Registers BNEP service, set a maximum frame size and assigns a packet handler. On embedded systems, use NULL for connection parameter.
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| 238 | int bnep_register_service(void * connection, uint16_t service_uuid, uint16_t max_frame_size);
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| 239 |
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| 240 | // Unregister BNEP service.
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| 241 | void bnep_unregister_service(uint16_t service_uuid);
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| 242 |
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| 243 | #if defined __cplusplus
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| 244 | }
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| 245 | #endif
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| 246 |
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| 247 | #endif // __BNEP_H
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