1/*
2 * libjingle
3 * Copyright 2014, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#if !defined(__has_feature) || !__has_feature(objc_arc)
29#error "This file requires ARC support."
30#endif
31
32#import "RTCDataChannel+Internal.h"
33
34#include "talk/app/webrtc/datachannelinterface.h"
35
36namespace webrtc {
37
38class RTCDataChannelObserver : public DataChannelObserver {
39 public:
40  RTCDataChannelObserver(RTCDataChannel* channel) { _channel = channel; }
41
42  virtual void OnStateChange() OVERRIDE {
43    [_channel.delegate channelDidChangeState:_channel];
44  }
45
46  virtual void OnMessage(const DataBuffer& buffer) OVERRIDE {
47    if (!_channel.delegate) {
48      return;
49    }
50    RTCDataBuffer* dataBuffer =
51        [[RTCDataBuffer alloc] initWithDataBuffer:buffer];
52    [_channel.delegate channel:_channel didReceiveMessageWithBuffer:dataBuffer];
53  }
54
55 private:
56  __weak RTCDataChannel* _channel;
57};
58}
59
60// TODO(tkchin): move to shared location
61NSString* NSStringFromStdString(const std::string& stdString) {
62  // std::string may contain null termination character so we construct
63  // using length.
64  return [[NSString alloc] initWithBytes:stdString.data()
65                                  length:stdString.length()
66                                encoding:NSUTF8StringEncoding];
67}
68
69std::string StdStringFromNSString(NSString* nsString) {
70  NSData* charData = [nsString dataUsingEncoding:NSUTF8StringEncoding];
71  return std::string(reinterpret_cast<const char*>([charData bytes]),
72                     [charData length]);
73}
74
75@implementation RTCDataChannelInit {
76  webrtc::DataChannelInit _dataChannelInit;
77}
78
79- (BOOL)isOrdered {
80  return _dataChannelInit.ordered;
81}
82
83- (void)setIsOrdered:(BOOL)isOrdered {
84  _dataChannelInit.ordered = isOrdered;
85}
86
87- (NSInteger)maxRetransmitTime {
88  return _dataChannelInit.maxRetransmitTime;
89}
90
91- (void)setMaxRetransmitTime:(NSInteger)maxRetransmitTime {
92  _dataChannelInit.maxRetransmitTime = maxRetransmitTime;
93}
94
95- (NSInteger)maxRetransmits {
96  return _dataChannelInit.maxRetransmits;
97}
98
99- (void)setMaxRetransmits:(NSInteger)maxRetransmits {
100  _dataChannelInit.maxRetransmits = maxRetransmits;
101}
102
103- (NSString*)protocol {
104  return NSStringFromStdString(_dataChannelInit.protocol);
105}
106
107- (void)setProtocol:(NSString*)protocol {
108  _dataChannelInit.protocol = StdStringFromNSString(protocol);
109}
110
111- (BOOL)isNegotiated {
112  return _dataChannelInit.negotiated;
113}
114
115- (void)setIsNegotiated:(BOOL)isNegotiated {
116  _dataChannelInit.negotiated = isNegotiated;
117}
118
119- (NSInteger)streamId {
120  return _dataChannelInit.id;
121}
122
123- (void)setStreamId:(NSInteger)streamId {
124  _dataChannelInit.id = streamId;
125}
126
127@end
128
129@implementation RTCDataChannelInit (Internal)
130
131- (const webrtc::DataChannelInit*)dataChannelInit {
132  return &_dataChannelInit;
133}
134
135@end
136
137@implementation RTCDataBuffer {
138  rtc::scoped_ptr<webrtc::DataBuffer> _dataBuffer;
139}
140
141- (instancetype)initWithData:(NSData*)data isBinary:(BOOL)isBinary {
142  NSAssert(data, @"data cannot be nil");
143  if (self = [super init]) {
144    rtc::Buffer buffer([data bytes], [data length]);
145    _dataBuffer.reset(new webrtc::DataBuffer(buffer, isBinary));
146  }
147  return self;
148}
149
150- (NSData*)data {
151  return [NSData dataWithBytes:_dataBuffer->data.data()
152                        length:_dataBuffer->data.length()];
153}
154
155- (BOOL)isBinary {
156  return _dataBuffer->binary;
157}
158
159@end
160
161@implementation RTCDataBuffer (Internal)
162
163- (instancetype)initWithDataBuffer:(const webrtc::DataBuffer&)buffer {
164  if (self = [super init]) {
165    _dataBuffer.reset(new webrtc::DataBuffer(buffer));
166  }
167  return self;
168}
169
170- (const webrtc::DataBuffer*)dataBuffer {
171  return _dataBuffer.get();
172}
173
174@end
175
176@implementation RTCDataChannel {
177  rtc::scoped_refptr<webrtc::DataChannelInterface> _dataChannel;
178  rtc::scoped_ptr<webrtc::RTCDataChannelObserver> _observer;
179  BOOL _isObserverRegistered;
180}
181
182- (NSString*)label {
183  return NSStringFromStdString(_dataChannel->label());
184}
185
186- (BOOL)isReliable {
187  return _dataChannel->reliable();
188}
189
190- (BOOL)isOrdered {
191  return _dataChannel->ordered();
192}
193
194- (NSUInteger)maxRetransmitTimeMs {
195  return _dataChannel->maxRetransmitTime();
196}
197
198- (NSUInteger)maxRetransmits {
199  return _dataChannel->maxRetransmits();
200}
201
202- (NSString*)protocol {
203  return NSStringFromStdString(_dataChannel->protocol());
204}
205
206- (BOOL)isNegotiated {
207  return _dataChannel->negotiated();
208}
209
210- (NSInteger)streamId {
211  return _dataChannel->id();
212}
213
214- (RTCDataChannelState)state {
215  switch (_dataChannel->state()) {
216    case webrtc::DataChannelInterface::DataState::kConnecting:
217      return kRTCDataChannelStateConnecting;
218    case webrtc::DataChannelInterface::DataState::kOpen:
219      return kRTCDataChannelStateOpen;
220    case webrtc::DataChannelInterface::DataState::kClosing:
221      return kRTCDataChannelStateClosing;
222    case webrtc::DataChannelInterface::DataState::kClosed:
223      return kRTCDataChannelStateClosed;
224  }
225}
226
227- (NSUInteger)bufferedAmount {
228  return _dataChannel->buffered_amount();
229}
230
231- (void)setDelegate:(id<RTCDataChannelDelegate>)delegate {
232  if (_delegate == delegate) {
233    return;
234  }
235  if (_isObserverRegistered) {
236    _dataChannel->UnregisterObserver();
237    _isObserverRegistered = NO;
238  }
239  _delegate = delegate;
240  if (_delegate) {
241    _dataChannel->RegisterObserver(_observer.get());
242    _isObserverRegistered = YES;
243  }
244}
245
246- (void)close {
247  _dataChannel->Close();
248}
249
250- (BOOL)sendData:(RTCDataBuffer*)data {
251  return _dataChannel->Send(*data.dataBuffer);
252}
253
254@end
255
256@implementation RTCDataChannel (Internal)
257
258- (instancetype)initWithDataChannel:
259                    (rtc::scoped_refptr<webrtc::DataChannelInterface>)
260                dataChannel {
261  NSAssert(dataChannel != NULL, @"dataChannel cannot be NULL");
262  if (self = [super init]) {
263    _dataChannel = dataChannel;
264    _observer.reset(new webrtc::RTCDataChannelObserver(self));
265  }
266  return self;
267}
268
269- (rtc::scoped_refptr<webrtc::DataChannelInterface>)dataChannel {
270  return _dataChannel;
271}
272
273@end
274