tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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ARDSignalingMessage.m (4817B)

      1 /*
      2 *  Copyright 2014 The WebRTC Project Authors. All rights reserved.
      3 *
      4 *  Use of this source code is governed by a BSD-style license
      5 *  that can be found in the LICENSE file in the root of the source
      6 *  tree. An additional intellectual property rights grant can be found
      7 *  in the file PATENTS.  All contributing project authors may
      8 *  be found in the AUTHORS file in the root of the source tree.
      9 */
     10 
     11 #import "ARDSignalingMessage.h"
     12 
     13 #import "sdk/objc/base/RTCLogging.h"
     14 
     15 #import "ARDUtilities.h"
     16 #import "RTCIceCandidate+JSON.h"
     17 #import "RTCSessionDescription+JSON.h"
     18 
     19 static NSString *const kARDSignalingMessageTypeKey = @"type";
     20 static NSString *const kARDTypeValueRemoveCandidates = @"remove-candidates";
     21 
     22 @implementation ARDSignalingMessage
     23 
     24 @synthesize type = _type;
     25 
     26 - (instancetype)initWithType:(ARDSignalingMessageType)type {
     27  self = [super init];
     28  if (self) {
     29    _type = type;
     30  }
     31  return self;
     32 }
     33 
     34 - (NSString *)description {
     35  return [[NSString alloc] initWithData:[self JSONData]
     36                               encoding:NSUTF8StringEncoding];
     37 }
     38 
     39 + (ARDSignalingMessage *)messageFromJSONString:(NSString *)jsonString {
     40  NSDictionary *values = [NSDictionary dictionaryWithJSONString:jsonString];
     41  if (!values) {
     42    RTCLogError(@"Error parsing signaling message JSON.");
     43    return nil;
     44  }
     45 
     46  NSString *typeString = values[kARDSignalingMessageTypeKey];
     47  ARDSignalingMessage *message = nil;
     48  if ([typeString isEqualToString:@"candidate"]) {
     49    RTC_OBJC_TYPE(RTCIceCandidate) *candidate =
     50        [RTC_OBJC_TYPE(RTCIceCandidate) candidateFromJSONDictionary:values];
     51    message = [[ARDICECandidateMessage alloc] initWithCandidate:candidate];
     52  } else if ([typeString isEqualToString:kARDTypeValueRemoveCandidates]) {
     53    RTCLogInfo(@"Received remove-candidates message");
     54    NSArray<RTC_OBJC_TYPE(RTCIceCandidate) *> *candidates =
     55        [RTC_OBJC_TYPE(RTCIceCandidate) candidatesFromJSONDictionary:values];
     56    message = [[ARDICECandidateRemovalMessage alloc]
     57        initWithRemovedCandidates:candidates];
     58  } else if ([typeString isEqualToString:@"offer"] ||
     59             [typeString isEqualToString:@"answer"]) {
     60    RTC_OBJC_TYPE(RTCSessionDescription) *description =
     61        [RTC_OBJC_TYPE(RTCSessionDescription)
     62            descriptionFromJSONDictionary:values];
     63    message =
     64        [[ARDSessionDescriptionMessage alloc] initWithDescription:description];
     65  } else if ([typeString isEqualToString:@"bye"]) {
     66    message = [[ARDByeMessage alloc] init];
     67  } else {
     68    RTCLogError(@"Unexpected type: %@", typeString);
     69  }
     70  return message;
     71 }
     72 
     73 - (NSData *)JSONData {
     74  return nil;
     75 }
     76 
     77 @end
     78 
     79 @implementation ARDICECandidateMessage
     80 
     81 @synthesize candidate = _candidate;
     82 
     83 - (instancetype)initWithCandidate:(RTC_OBJC_TYPE(RTCIceCandidate) *)candidate {
     84  self = [super initWithType:kARDSignalingMessageTypeCandidate];
     85  if (self) {
     86    _candidate = candidate;
     87  }
     88  return self;
     89 }
     90 
     91 - (NSData *)JSONData {
     92  return [_candidate JSONData];
     93 }
     94 
     95 @end
     96 
     97 @implementation ARDICECandidateRemovalMessage
     98 
     99 @synthesize candidates = _candidates;
    100 
    101 - (instancetype)initWithRemovedCandidates:
    102    (NSArray<RTC_OBJC_TYPE(RTCIceCandidate) *> *)candidates {
    103  NSParameterAssert(candidates.count);
    104  self = [super initWithType:kARDSignalingMessageTypeCandidateRemoval];
    105  if (self) {
    106    _candidates = candidates;
    107  }
    108  return self;
    109 }
    110 
    111 - (NSData *)JSONData {
    112  return [RTC_OBJC_TYPE(RTCIceCandidate)
    113      JSONDataForIceCandidates:_candidates
    114                      withType:kARDTypeValueRemoveCandidates];
    115 }
    116 
    117 @end
    118 
    119 @implementation ARDSessionDescriptionMessage
    120 
    121 @synthesize sessionDescription = _sessionDescription;
    122 
    123 - (instancetype)initWithDescription:
    124    (RTC_OBJC_TYPE(RTCSessionDescription) *)description {
    125  ARDSignalingMessageType messageType = kARDSignalingMessageTypeOffer;
    126  RTCSdpType sdpType = description.type;
    127  switch (sdpType) {
    128    case RTCSdpTypeOffer:
    129      messageType = kARDSignalingMessageTypeOffer;
    130      break;
    131    case RTCSdpTypeAnswer:
    132      messageType = kARDSignalingMessageTypeAnswer;
    133      break;
    134    case RTCSdpTypePrAnswer:
    135    case RTCSdpTypeRollback:
    136      NSAssert(NO,
    137               @"Unexpected type: %@",
    138               [RTC_OBJC_TYPE(RTCSessionDescription) stringForType:sdpType]);
    139      break;
    140  }
    141  self = [super initWithType:messageType];
    142  if (self) {
    143    _sessionDescription = description;
    144  }
    145  return self;
    146 }
    147 
    148 - (NSData *)JSONData {
    149  return [_sessionDescription JSONData];
    150 }
    151 
    152 @end
    153 
    154 @implementation ARDByeMessage
    155 
    156 - (instancetype)init {
    157  return [super initWithType:kARDSignalingMessageTypeBye];
    158 }
    159 
    160 - (NSData *)JSONData {
    161  NSDictionary *message = @{@"type" : @"bye"};
    162  return [NSJSONSerialization dataWithJSONObject:message
    163                                         options:NSJSONWritingPrettyPrinted
    164                                           error:NULL];
    165 }
    166 
    167 @end