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 ETH_ADDR_LEN 6
41#define TAP_MAX_PKT_WRITE_LEN 2000
42#ifndef PAN_SECURITY
43#define PAN_SECURITY                                                         \
44  (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_ENCRYPT | \
45   BTM_SEC_OUT_ENCRYPT)
46#endif
47
48#define PAN_STATE_UNKNOWN 0
49#define PAN_STATE_OPEN 1
50#define PAN_STATE_CLOSE 2
51#ifndef PAN_ROLE_INACTIVE
52#define PAN_ROLE_INACTIVE 0
53#endif
54
55/*******************************************************************************
56 *  Type definitions and return values
57 ******************************************************************************/
58
59typedef struct eth_hdr {
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  int handle;
67  int state;
68  uint16_t 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  int btl_if_handle;
77  int btl_if_handle_panu;
78  int tap_fd;
79  int enabled;
80  int open_count;
81  int flow;  // 1: outbound data flow on; 0: outbound data flow off
82  btpan_conn_t conns[MAX_PAN_CONNS];
83  int congest_packet_size;
84  unsigned char congest_packet[1600];  // max ethernet packet size
85} btpan_cb_t;
86
87/*******************************************************************************
88 *  Functions
89 ******************************************************************************/
90
91extern btpan_cb_t btpan_cb;
92btpan_conn_t* btpan_new_conn(int handle, const BD_ADDR addr, int local_role,
93                             int peer_role);
94btpan_conn_t* btpan_find_conn_addr(const BD_ADDR addr);
95btpan_conn_t* btpan_find_conn_handle(uint16_t handle);
96void btpan_set_flow_control(bool enable);
97int btpan_get_connected_count(void);
98int btpan_tap_open(void);
99void create_tap_read_thread(int tap_fd);
100void destroy_tap_read_thread(void);
101int btpan_tap_close(int tap_fd);
102int btpan_tap_send(int tap_fd, const BD_ADDR src, const BD_ADDR dst,
103                   uint16_t protocol, const char* buff, uint16_t size, bool ext,
104                   bool forward);
105
106static inline int is_empty_eth_addr(const BD_ADDR addr) {
107  int i;
108  for (i = 0; i < BD_ADDR_LEN; i++)
109    if (addr[i] != 0) return 0;
110  return 1;
111}
112
113static inline int is_valid_bt_eth_addr(const BD_ADDR addr) {
114  if (is_empty_eth_addr(addr)) return 0;
115  return addr[0] & 1 ? 0 : 1; /* Cannot be multicasting address */
116}
117
118#endif
119