1#!/usr/bin/env python3
2#
3#   Copyright 2020 - The Android Open Source Project
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
17from google.protobuf import empty_pb2 as empty_proto
18
19from cert.event_stream import EventStream
20from cert.event_stream import IEventStream
21from cert.captures import HciCaptures
22from cert.closable import Closable
23from cert.closable import safeClose
24from bluetooth_packets_python3 import hci_packets
25from cert.truth import assertThat
26from hci.facade import le_acl_manager_facade_pb2 as le_acl_manager_facade
27
28
29class PyLeAclManagerAclConnection(IEventStream, Closable):
30
31    def __init__(self, le_acl_manager, address, remote_addr, handle, event_stream):
32        """
33        An abstract representation for an LE ACL connection in GD certification test
34        :param le_acl_manager: The LeAclManager from this GD device
35        :param address: The local device address
36        :param remote_addr: Remote device address
37        :param handle: Connection handle
38        :param event_stream: The connection event stream for this connection
39        """
40        self.le_acl_manager = le_acl_manager
41        # todo enable filtering after sorting out handles
42        # self.our_acl_stream = FilteringEventStream(acl_stream, None)
43        self.handle = handle
44        self.connection_event_stream = event_stream
45        self.acl_stream = EventStream(
46            self.le_acl_manager.FetchAclData(le_acl_manager_facade.LeHandleMsg(handle=self.handle)))
47        self.remote_address = remote_addr
48        self.own_address = address
49        self.disconnect_reason = None
50
51    def close(self):
52        safeClose(self.connection_event_stream)
53        safeClose(self.acl_stream)
54
55    def wait_for_disconnection_complete(self):
56        disconnection_complete = HciCaptures.DisconnectionCompleteCapture()
57        assertThat(self.connection_event_stream).emits(disconnection_complete)
58        self.disconnect_reason = disconnection_complete.get().GetReason()
59
60    def send(self, data):
61        self.le_acl_manager.SendAclData(le_acl_manager_facade.LeAclData(handle=self.handle, payload=bytes(data)))
62
63    def get_event_queue(self):
64        return self.acl_stream.get_event_queue()
65
66
67class PyLeAclManager(Closable):
68
69    def __init__(self, device):
70        """
71        LE ACL Manager for GD Certification test
72        :param device: The GD device
73        """
74        self.le_acl_manager = device.hci_le_acl_manager
75
76        self.incoming_connection_event_stream = None
77        self.outgoing_connection_event_streams = {}
78        self.active_connections = []
79        self.next_token = 1
80
81    def close(self):
82        safeClose(self.incoming_connection_event_stream)
83        for v in self.outgoing_connection_event_streams.values():
84            safeClose(v[0])
85        for connection in self.active_connections:
86            safeClose(connection)
87
88    def listen_for_incoming_connections(self):
89        assertThat(self.incoming_connection_event_stream).isNone()
90        self.incoming_connection_event_stream = EventStream(
91            self.le_acl_manager.FetchIncomingConnection(empty_proto.Empty()))
92
93    def connect_to_remote(self, remote_addr):
94        token = self.initiate_connection(remote_addr)
95        return self.complete_outgoing_connection(token)
96
97    def wait_for_connection(self):
98        self.listen_for_incoming_connections()
99        return self.complete_incoming_connection()
100
101    def cancel_connection(self, token):
102        assertThat(token in self.outgoing_connection_event_streams).isTrue()
103        pair = self.outgoing_connection_event_streams.pop(token)
104        safeClose(pair[0])
105        self.le_acl_manager.CancelConnection(pair[1])
106
107    def initiate_connection(self, remote_addr):
108        assertThat(self.next_token in self.outgoing_connection_event_streams).isFalse()
109        self.outgoing_connection_event_streams[self.next_token] = EventStream(
110            self.le_acl_manager.CreateConnection(remote_addr)), remote_addr
111        token = self.next_token
112        self.next_token += 1
113        return token
114
115    def complete_connection(self, event_stream):
116        connection_complete = HciCaptures.LeConnectionCompleteCapture()
117        assertThat(event_stream).emits(connection_complete)
118        complete = connection_complete.get()
119        handle = complete.GetConnectionHandle()
120        remote = complete.GetPeerAddress()
121        if complete.GetSubeventCode() == hci_packets.SubeventCode.ENHANCED_CONNECTION_COMPLETE:
122            address = complete.GetLocalResolvablePrivateAddress()
123        else:
124            address = None
125        connection = PyLeAclManagerAclConnection(self.le_acl_manager, address, remote, handle, event_stream)
126        self.active_connections.append(connection)
127        return connection
128
129    def complete_incoming_connection(self):
130        assertThat(self.incoming_connection_event_stream).isNotNone()
131        event_stream = self.incoming_connection_event_stream
132        self.incoming_connection_event_stream = None
133        return self.complete_connection(event_stream)
134
135    def complete_outgoing_connection(self, token):
136        assertThat(self.outgoing_connection_event_streams[token]).isNotNone()
137        event_stream = self.outgoing_connection_event_streams.pop(token)[0]
138        return self.complete_connection(event_stream)
139