1/******************************************************************************
2 *
3 *  Copyright (C) 2009-2012 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19/*******************************************************************************
20 *
21 *  Filename:      btif_pan_internal.h
22 *
23 *  Description:   Bluetooth pan internal
24 *
25 *******************************************************************************/
26
27#ifndef BTIF_PAN_INTERNAL_H
28#define BTIF_PAN_INTERNAL_H
29
30#include "btif_pan.h"
31#include "bt_types.h"
32
33/*******************************************************************************
34**  Constants & Macros
35********************************************************************************/
36
37#define PAN_NAP_SERVICE_NAME "Android Network Access Point"
38#define PANU_SERVICE_NAME "Android Network User"
39#define TAP_IF_NAME "bt-pan"
40#define ETH_ADDR_LEN        6
41#define TAP_MAX_PKT_WRITE_LEN 2000
42#ifndef PAN_SECURITY
43#define PAN_SECURITY (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_ENCRYPT | BTM_SEC_OUT_ENCRYPT)
44#endif
45
46#define PAN_STATE_UNKNOWN   0
47#define PAN_STATE_OPEN      1
48#define PAN_STATE_CLOSE     2
49#ifndef PAN_ROLE_INACTIVE
50#define PAN_ROLE_INACTIVE 0
51#endif
52
53
54/*******************************************************************************
55**  Type definitions and return values
56********************************************************************************/
57
58typedef struct eth_hdr
59{
60    unsigned char h_dest[ETH_ADDR_LEN];
61    unsigned char h_src[ETH_ADDR_LEN];
62    short         h_proto;
63} tETH_HDR;
64
65typedef struct
66{
67    int handle;
68    int state;
69    UINT16 protocol;
70    BD_ADDR peer;
71    int local_role;
72    int remote_role;
73    unsigned char eth_addr[ETH_ADDR_LEN];
74} btpan_conn_t;
75
76typedef struct
77{
78    int btl_if_handle;
79    int btl_if_handle_panu;
80    int tap_fd;
81    int enabled;
82    int open_count;
83    int flow; // 1: outbound data flow on; 0: outbound data flow off
84    btpan_conn_t conns[MAX_PAN_CONNS];
85    int congest_packet_size;
86    unsigned char congest_packet[1600]; //max ethernet packet size
87} btpan_cb_t;
88
89
90/*******************************************************************************
91**  Functions
92********************************************************************************/
93
94extern btpan_cb_t btpan_cb;
95btpan_conn_t *btpan_new_conn(int handle, const BD_ADDR addr, int local_role, int peer_role);
96btpan_conn_t *btpan_find_conn_addr(const BD_ADDR addr);
97btpan_conn_t *btpan_find_conn_handle(UINT16 handle);
98void btpan_set_flow_control(BOOLEAN enable);
99int btpan_get_connected_count(void);
100int btpan_tap_open(void);
101void create_tap_read_thread(int tap_fd);
102void destroy_tap_read_thread(void);
103int btpan_tap_close(int tap_fd);
104int btpan_tap_send(int tap_fd, const BD_ADDR src, const BD_ADDR dst, UINT16 protocol,
105                   const char* buff, UINT16 size, BOOLEAN ext, BOOLEAN forward);
106
107static inline int is_empty_eth_addr(const BD_ADDR addr)
108{
109    int i;
110    for(i = 0; i < BD_ADDR_LEN; i++)
111        if(addr[i] != 0)
112            return 0;
113    return 1;
114}
115
116static inline int is_valid_bt_eth_addr(const BD_ADDR addr)
117{
118    if(is_empty_eth_addr(addr))
119        return 0;
120    return addr[0] & 1 ? 0 : 1; /* Cannot be multicasting address */
121}
122
123#endif
124