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| 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 #import "ARDSignalingMessage.h" | |
| 29 | |
| 30 #import "RTCLogging.h" | |
| 31 | |
| 32 #import "ARDUtilities.h" | |
| 33 #import "RTCICECandidate+JSON.h" | |
| 34 #import "RTCSessionDescription+JSON.h" | |
| 35 | |
| 36 static NSString const *kARDSignalingMessageTypeKey = @"type"; | |
| 37 | |
| 38 @implementation ARDSignalingMessage | |
| 39 | |
| 40 @synthesize type = _type; | |
| 41 | |
| 42 - (instancetype)initWithType:(ARDSignalingMessageType)type { | |
| 43 if (self = [super init]) { | |
| 44 _type = type; | |
| 45 } | |
| 46 return self; | |
| 47 } | |
| 48 | |
| 49 - (NSString *)description { | |
| 50 return [[NSString alloc] initWithData:[self JSONData] | |
| 51 encoding:NSUTF8StringEncoding]; | |
| 52 } | |
| 53 | |
| 54 + (ARDSignalingMessage *)messageFromJSONString:(NSString *)jsonString { | |
| 55 NSDictionary *values = [NSDictionary dictionaryWithJSONString:jsonString]; | |
| 56 if (!values) { | |
| 57 RTCLogError(@"Error parsing signaling message JSON."); | |
| 58 return nil; | |
| 59 } | |
| 60 | |
| 61 NSString *typeString = values[kARDSignalingMessageTypeKey]; | |
| 62 ARDSignalingMessage *message = nil; | |
| 63 if ([typeString isEqualToString:@"candidate"]) { | |
| 64 RTCICECandidate *candidate = | |
| 65 [RTCICECandidate candidateFromJSONDictionary:values]; | |
| 66 message = [[ARDICECandidateMessage alloc] initWithCandidate:candidate]; | |
| 67 } else if ([typeString isEqualToString:@"offer"] || | |
| 68 [typeString isEqualToString:@"answer"]) { | |
| 69 RTCSessionDescription *description = | |
| 70 [RTCSessionDescription descriptionFromJSONDictionary:values]; | |
| 71 message = | |
| 72 [[ARDSessionDescriptionMessage alloc] initWithDescription:description]; | |
| 73 } else if ([typeString isEqualToString:@"bye"]) { | |
| 74 message = [[ARDByeMessage alloc] init]; | |
| 75 } else { | |
| 76 RTCLogError(@"Unexpected type: %@", typeString); | |
| 77 } | |
| 78 return message; | |
| 79 } | |
| 80 | |
| 81 - (NSData *)JSONData { | |
| 82 return nil; | |
| 83 } | |
| 84 | |
| 85 @end | |
| 86 | |
| 87 @implementation ARDICECandidateMessage | |
| 88 | |
| 89 @synthesize candidate = _candidate; | |
| 90 | |
| 91 - (instancetype)initWithCandidate:(RTCICECandidate *)candidate { | |
| 92 if (self = [super initWithType:kARDSignalingMessageTypeCandidate]) { | |
| 93 _candidate = candidate; | |
| 94 } | |
| 95 return self; | |
| 96 } | |
| 97 | |
| 98 - (NSData *)JSONData { | |
| 99 return [_candidate JSONData]; | |
| 100 } | |
| 101 | |
| 102 @end | |
| 103 | |
| 104 @implementation ARDSessionDescriptionMessage | |
| 105 | |
| 106 @synthesize sessionDescription = _sessionDescription; | |
| 107 | |
| 108 - (instancetype)initWithDescription:(RTCSessionDescription *)description { | |
| 109 ARDSignalingMessageType type = kARDSignalingMessageTypeOffer; | |
| 110 NSString *typeString = description.type; | |
| 111 if ([typeString isEqualToString:@"offer"]) { | |
| 112 type = kARDSignalingMessageTypeOffer; | |
| 113 } else if ([typeString isEqualToString:@"answer"]) { | |
| 114 type = kARDSignalingMessageTypeAnswer; | |
| 115 } else { | |
| 116 NSAssert(NO, @"Unexpected type: %@", typeString); | |
| 117 } | |
| 118 if (self = [super initWithType:type]) { | |
| 119 _sessionDescription = description; | |
| 120 } | |
| 121 return self; | |
| 122 } | |
| 123 | |
| 124 - (NSData *)JSONData { | |
| 125 return [_sessionDescription JSONData]; | |
| 126 } | |
| 127 | |
| 128 @end | |
| 129 | |
| 130 @implementation ARDByeMessage | |
| 131 | |
| 132 - (instancetype)init { | |
| 133 return [super initWithType:kARDSignalingMessageTypeBye]; | |
| 134 } | |
| 135 | |
| 136 - (NSData *)JSONData { | |
| 137 NSDictionary *message = @{ | |
| 138 @"type": @"bye" | |
| 139 }; | |
| 140 return [NSJSONSerialization dataWithJSONObject:message | |
| 141 options:NSJSONWritingPrettyPrinted | |
| 142 error:NULL]; | |
| 143 } | |
| 144 | |
| 145 @end | |
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