1 /******************************************************************************
2 *
3 * Copyright 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
58 typedef struct eth_hdr {
59 RawAddress h_dest;
60 RawAddress h_src;
61 short h_proto;
62 } tETH_HDR;
63
64 typedef 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
74 typedef 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
90 extern btpan_cb_t btpan_cb;
91 btpan_conn_t* btpan_new_conn(int handle, const RawAddress& addr, int local_role,
92 int peer_role);
93 btpan_conn_t* btpan_find_conn_addr(const RawAddress& addr);
94 btpan_conn_t* btpan_find_conn_handle(uint16_t handle);
95 void btpan_set_flow_control(bool enable);
96 int btpan_get_connected_count(void);
97 int btpan_tap_open(void);
98 void create_tap_read_thread(int tap_fd);
99 void destroy_tap_read_thread(void);
100 int btpan_tap_close(int tap_fd);
101 int 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
is_empty_eth_addr(const RawAddress & addr)105 static inline int is_empty_eth_addr(const RawAddress& addr) {
106 return addr == RawAddress::kEmpty;
107 }
108
is_valid_bt_eth_addr(const RawAddress & addr)109 static 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