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#ifndef PAN_SECURITY
42#define PAN_SECURITY (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_ENCRYPT | BTM_SEC_OUT_ENCRYPT)
43#endif
44
45#define PAN_STATE_UNKNOWN   0
46#define PAN_STATE_OPEN      1
47#define PAN_STATE_CLOSE     2
48#ifndef PAN_ROLE_INACTIVE
49#define PAN_ROLE_INACTIVE 0
50#endif
51
52
53/*******************************************************************************
54**  Type definitions and return values
55********************************************************************************/
56
57typedef struct eth_hdr
58{
59    unsigned char h_dest[ETH_ADDR_LEN];
60    unsigned char h_src[ETH_ADDR_LEN];
61    short         h_proto;
62} tETH_HDR;
63
64typedef struct
65{
66    int handle;
67    int state;
68    UINT16 protocol;
69    BD_ADDR peer;
70    int local_role;
71    int remote_role;
72    unsigned char eth_addr[ETH_ADDR_LEN];
73} btpan_conn_t;
74
75typedef struct
76{
77    int btl_if_handle;
78    int btl_if_handle_panu;
79    int tap_fd;
80    int enabled;
81    int open_count;
82    int flow; // 1: outbound data flow on; 0: outbound data flow off
83    btpan_conn_t conns[MAX_PAN_CONNS];
84    int congest_packet_size;
85    unsigned char congest_packet[1600]; //max ethernet packet size
86} btpan_cb_t;
87
88
89/*******************************************************************************
90**  Functions
91********************************************************************************/
92
93extern btpan_cb_t btpan_cb;
94btpan_conn_t *btpan_new_conn(int handle, const BD_ADDR addr, int local_role, int peer_role);
95btpan_conn_t *btpan_find_conn_addr(const BD_ADDR addr);
96btpan_conn_t *btpan_find_conn_handle(UINT16 handle);
97void btpan_set_flow_control(BOOLEAN enable);
98int btpan_get_connected_count(void);
99int btpan_tap_open(void);
100void create_tap_read_thread(int tap_fd);
101void destroy_tap_read_thread(void);
102int btpan_tap_close(int tap_fd);
103int btpan_tap_send(int tap_fd, const BD_ADDR src, const BD_ADDR dst, UINT16 protocol,
104                   const char* buff, UINT16 size, BOOLEAN ext, BOOLEAN forward);
105
106static inline int is_empty_eth_addr(const BD_ADDR addr)
107{
108    int i;
109    for(i = 0; i < BD_ADDR_LEN; i++)
110        if(addr[i] != 0)
111            return 0;
112    return 1;
113}
114
115static inline int is_valid_bt_eth_addr(const BD_ADDR addr)
116{
117    if(is_empty_eth_addr(addr))
118        return 0;
119    return addr[0] & 1 ? 0 : 1; /* Cannot be multicasting address */
120}
121
122#endif
123