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 "bt_types.h"
31#include "btif_pan.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 TAP_MAX_PKT_WRITE_LEN 2000
41#ifndef PAN_SECURITY
42#define PAN_SECURITY                                                         \
43  (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_ENCRYPT | \
44   BTM_SEC_OUT_ENCRYPT)
45#endif
46
47#define PAN_STATE_UNKNOWN 0
48#define PAN_STATE_OPEN 1
49#define PAN_STATE_CLOSE 2
50#ifndef PAN_ROLE_INACTIVE
51#define PAN_ROLE_INACTIVE 0
52#endif
53
54/*******************************************************************************
55 *  Type definitions and return values
56 ******************************************************************************/
57
58typedef struct eth_hdr {
59  RawAddress h_dest;
60  RawAddress h_src;
61  short h_proto;
62} tETH_HDR;
63
64typedef struct {
65  int handle;
66  int state;
67  uint16_t protocol;
68  RawAddress peer;
69  int local_role;
70  int remote_role;
71  RawAddress eth_addr;
72} btpan_conn_t;
73
74typedef struct {
75  int btl_if_handle;
76  int btl_if_handle_panu;
77  int tap_fd;
78  int enabled;
79  int open_count;
80  int flow;  // 1: outbound data flow on; 0: outbound data flow off
81  btpan_conn_t conns[MAX_PAN_CONNS];
82  int congest_packet_size;
83  unsigned char congest_packet[1600];  // max ethernet packet size
84} btpan_cb_t;
85
86/*******************************************************************************
87 *  Functions
88 ******************************************************************************/
89
90extern btpan_cb_t btpan_cb;
91btpan_conn_t* btpan_new_conn(int handle, const RawAddress& addr, int local_role,
92                             int peer_role);
93btpan_conn_t* btpan_find_conn_addr(const RawAddress& addr);
94btpan_conn_t* btpan_find_conn_handle(uint16_t handle);
95void btpan_set_flow_control(bool enable);
96int btpan_get_connected_count(void);
97int btpan_tap_open(void);
98void create_tap_read_thread(int tap_fd);
99void destroy_tap_read_thread(void);
100int btpan_tap_close(int tap_fd);
101int btpan_tap_send(int tap_fd, const RawAddress& src, const RawAddress& dst,
102                   uint16_t protocol, const char* buff, uint16_t size, bool ext,
103                   bool forward);
104
105static inline int is_empty_eth_addr(const RawAddress& addr) {
106  return addr == RawAddress::kEmpty;
107}
108
109static inline int is_valid_bt_eth_addr(const RawAddress& addr) {
110  if (is_empty_eth_addr(addr)) return 0;
111  return addr.address[0] & 1 ? 0 : 1; /* Cannot be multicasting address */
112}
113
114#endif
115