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
59 typedef 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
65 typedef 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
75 typedef 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
91 extern btpan_cb_t btpan_cb;
92 btpan_conn_t* btpan_new_conn(int handle, const BD_ADDR addr, int local_role,
93 int peer_role);
94 btpan_conn_t* btpan_find_conn_addr(const BD_ADDR addr);
95 btpan_conn_t* btpan_find_conn_handle(uint16_t handle);
96 void btpan_set_flow_control(bool enable);
97 int btpan_get_connected_count(void);
98 int btpan_tap_open(void);
99 void create_tap_read_thread(int tap_fd);
100 void destroy_tap_read_thread(void);
101 int btpan_tap_close(int tap_fd);
102 int 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
is_empty_eth_addr(const BD_ADDR addr)106 static 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
is_valid_bt_eth_addr(const BD_ADDR addr)113 static 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