sdk/objc/api/peerconnection/RTCConfiguration.h - src/ - Git at Google

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */

 #import <Foundation/Foundation.h>

 #import "RTCCertificate.h"
 #import "RTCCryptoOptions.h"
 #import "RTCMacros.h"

 @class RTC_OBJC_TYPE(RTCIceServer);

 /**
  * Represents the ice transport policy. This exposes the same states in C++,
  * which include one more state than what exists in the W3C spec.
  */
 typedef NS_ENUM(NSInteger, RTCIceTransportPolicy) {
   RTCIceTransportPolicyNone,
   RTCIceTransportPolicyRelay,
   RTCIceTransportPolicyNoHost,
   RTCIceTransportPolicyAll
 };

 /** Represents the bundle policy. */
 typedef NS_ENUM(NSInteger, RTCBundlePolicy) {
   RTCBundlePolicyBalanced,
   RTCBundlePolicyMaxCompat,
   RTCBundlePolicyMaxBundle
 };

 /** Represents the rtcp mux policy. */
 typedef NS_ENUM(NSInteger, RTCRtcpMuxPolicy) { RTCRtcpMuxPolicyNegotiate, RTCRtcpMuxPolicyRequire };

 /** Represents the tcp candidate policy. */
 typedef NS_ENUM(NSInteger, RTCTcpCandidatePolicy) {
   RTCTcpCandidatePolicyEnabled,
   RTCTcpCandidatePolicyDisabled
 };

 /** Represents the candidate network policy. */
 typedef NS_ENUM(NSInteger, RTCCandidateNetworkPolicy) {
   RTCCandidateNetworkPolicyAll,
   RTCCandidateNetworkPolicyLowCost
 };

 /** Represents the continual gathering policy. */
 typedef NS_ENUM(NSInteger, RTCContinualGatheringPolicy) {
   RTCContinualGatheringPolicyGatherOnce,
   RTCContinualGatheringPolicyGatherContinually
 };

 /** Represents the encryption key type. */
 typedef NS_ENUM(NSInteger, RTCEncryptionKeyType) {
   RTCEncryptionKeyTypeRSA,
   RTCEncryptionKeyTypeECDSA,
 };

 /** Represents the chosen SDP semantics for the RTCPeerConnection. */
 typedef NS_ENUM(NSInteger, RTCSdpSemantics) {
   // TODO(https://crbug.com/webrtc/13528): Remove support for Plan B.
   RTCSdpSemanticsPlanB,
   RTCSdpSemanticsUnifiedPlan,
 };

 NS_ASSUME_NONNULL_BEGIN

 RTC_OBJC_EXPORT
 @interface RTC_OBJC_TYPE (RTCConfiguration) : NSObject

 /** If true, allows DSCP codes to be set on outgoing packets, configured using
  *  networkPriority field of RTCRtpEncodingParameters. Defaults to false.
  */
 @property(nonatomic, assign) BOOL enableDscp;

 /** An array of Ice Servers available to be used by ICE. */
 @property(nonatomic, copy) NSArray<RTC_OBJC_TYPE(RTCIceServer) *> *iceServers;

 /** An RTCCertificate for 're' use. */
 @property(nonatomic, nullable) RTC_OBJC_TYPE(RTCCertificate) * certificate;

 /** Which candidates the ICE agent is allowed to use. The W3C calls it
  * `iceTransportPolicy`, while in C++ it is called `type`. */
 @property(nonatomic, assign) RTCIceTransportPolicy iceTransportPolicy;

 /** The media-bundling policy to use when gathering ICE candidates. */
 @property(nonatomic, assign) RTCBundlePolicy bundlePolicy;

 /** The rtcp-mux policy to use when gathering ICE candidates. */
 @property(nonatomic, assign) RTCRtcpMuxPolicy rtcpMuxPolicy;
 @property(nonatomic, assign) RTCTcpCandidatePolicy tcpCandidatePolicy;
 @property(nonatomic, assign) RTCCandidateNetworkPolicy candidateNetworkPolicy;
 @property(nonatomic, assign) RTCContinualGatheringPolicy continualGatheringPolicy;

 /** If set to YES, don't gather IPv6 ICE candidates on Wi-Fi.
  *  Only intended to be used on specific devices. Certain phones disable IPv6
  *  when the screen is turned off and it would be better to just disable the
  *  IPv6 ICE candidates on Wi-Fi in those cases.
  *  Default is NO.
  */
 @property(nonatomic, assign) BOOL disableIPV6OnWiFi;

 /** By default, the PeerConnection will use a limited number of IPv6 network
  *  interfaces, in order to avoid too many ICE candidate pairs being created
  *  and delaying ICE completion.
  *
  *  Can be set to INT_MAX to effectively disable the limit.
  */
 @property(nonatomic, assign) int maxIPv6Networks;

 /** Exclude link-local network interfaces
  *  from considertaion for gathering ICE candidates.
  *  Defaults to NO.
  */
 @property(nonatomic, assign) BOOL disableLinkLocalNetworks;

 @property(nonatomic, assign) int audioJitterBufferMaxPackets;
 @property(nonatomic, assign) BOOL audioJitterBufferFastAccelerate;
 @property(nonatomic, assign) int iceConnectionReceivingTimeout;
 @property(nonatomic, assign) int iceBackupCandidatePairPingInterval;

 /** Key type used to generate SSL identity. Default is ECDSA. */
 @property(nonatomic, assign) RTCEncryptionKeyType keyType;

 /** ICE candidate pool size as defined in JSEP. Default is 0. */
 @property(nonatomic, assign) int iceCandidatePoolSize;

 /** Prune turn ports on the same network to the same turn server.
  *  Default is NO.
  */
 @property(nonatomic, assign) BOOL shouldPruneTurnPorts;

 /** If set to YES, this means the ICE transport should presume TURN-to-TURN
  *  candidate pairs will succeed, even before a binding response is received.
  */
 @property(nonatomic, assign) BOOL shouldPresumeWritableWhenFullyRelayed;

 /* This flag is only effective when `continualGatheringPolicy` is
  * RTCContinualGatheringPolicyGatherContinually.
  *
  * If YES, after the ICE transport type is changed such that new types of
  * ICE candidates are allowed by the new transport type, e.g. from
  * RTCIceTransportPolicyRelay to RTCIceTransportPolicyAll, candidates that
  * have been gathered by the ICE transport but not matching the previous
  * transport type and as a result not observed by PeerConnectionDelegateAdapter,
  * will be surfaced to the delegate.
  */
 @property(nonatomic, assign) BOOL shouldSurfaceIceCandidatesOnIceTransportTypeChanged;

 /** If set to non-nil, controls the minimal interval between consecutive ICE
  *  check packets.
  */
 @property(nonatomic, copy, nullable) NSNumber *iceCheckMinInterval;

 /**
  * Configure the SDP semantics used by this PeerConnection. By default, this
  * is RTCSdpSemanticsUnifiedPlan which is compliant to the WebRTC 1.0
  * specification. It is possible to overrwite this to the deprecated
  * RTCSdpSemanticsPlanB SDP format, but note that RTCSdpSemanticsPlanB will be
  * deleted at some future date, see https://crbug.com/webrtc/13528.
  *
  * RTCSdpSemanticsUnifiedPlan will cause RTCPeerConnection to create offers and
  * answers with multiple m= sections where each m= section maps to one
  * RTCRtpSender and one RTCRtpReceiver (an RTCRtpTransceiver), either both audio
  * or both video. This will also cause RTCPeerConnection to ignore all but the
  * first a=ssrc lines that form a Plan B stream.
  *
  * RTCSdpSemanticsPlanB will cause RTCPeerConnection to create offers and
  * answers with at most one audio and one video m= section with multiple
  * RTCRtpSenders and RTCRtpReceivers specified as multiple a=ssrc lines within
  * the section. This will also cause RTCPeerConnection to ignore all but the
  * first m= section of the same media type.
  */
 @property(nonatomic, assign) RTCSdpSemantics sdpSemantics;

 /** Actively reset the SRTP parameters when the DTLS transports underneath are
  *  changed after offer/answer negotiation. This is only intended to be a
  *  workaround for crbug.com/835958
  */
 @property(nonatomic, assign) BOOL activeResetSrtpParams;

 /**
  * Defines advanced optional cryptographic settings related to SRTP and
  * frame encryption for native WebRTC. Setting this will overwrite any
  * options set through the PeerConnectionFactory (which is deprecated).
  */
 @property(nonatomic, nullable) RTC_OBJC_TYPE(RTCCryptoOptions) * cryptoOptions;

 /**
  * An optional string that will be attached to the TURN_ALLOCATE_REQUEST which
  * which can be used to correlate client logs with backend logs.
  */
 @property(nonatomic, nullable, copy) NSString *turnLoggingId;

 /**
  * Time interval between audio RTCP reports.
  */
 @property(nonatomic, assign) int rtcpAudioReportIntervalMs;

 /**
  * Time interval between video RTCP reports.
  */
 @property(nonatomic, assign) int rtcpVideoReportIntervalMs;

 /**
  * Allow implicit rollback of local description when remote description
  * conflicts with local description.
  * See: https://w3c.github.io/webrtc-pc/#dom-peerconnection-setremotedescription
  */
 @property(nonatomic, assign) BOOL enableImplicitRollback;

 /**
  * Control if "a=extmap-allow-mixed" is included in the offer.
  * See: https://www.chromestatus.com/feature/6269234631933952
  */
 @property(nonatomic, assign) BOOL offerExtmapAllowMixed;

 /**
  * Defines the interval applied to ALL candidate pairs
  * when ICE is strongly connected, and it overrides the
  * default value of this interval in the ICE implementation;
  */
 @property(nonatomic, copy, nullable) NSNumber *iceCheckIntervalStrongConnectivity;

 /**
  * Defines the counterpart for ALL pairs when ICE is
  * weakly connected, and it overrides the default value of
  * this interval in the ICE implementation
  */
 @property(nonatomic, copy, nullable) NSNumber *iceCheckIntervalWeakConnectivity;

 /**
  * The min time period for which a candidate pair must wait for response to
  * connectivity checks before it becomes unwritable. This parameter
  * overrides the default value in the ICE implementation if set.
  */
 @property(nonatomic, copy, nullable) NSNumber *iceUnwritableTimeout;

 /**
  * The min number of connectivity checks that a candidate pair must sent
  * without receiving response before it becomes unwritable. This parameter
  * overrides the default value in the ICE implementation if set.
  */
 @property(nonatomic, copy, nullable) NSNumber *iceUnwritableMinChecks;

 /**
  * The min time period for which a candidate pair must wait for response to
  * connectivity checks it becomes inactive. This parameter overrides the
  * default value in the ICE implementation if set.
  */
 @property(nonatomic, copy, nullable) NSNumber *iceInactiveTimeout;

 - (instancetype)init;

 @end

 NS_ASSUME_NONNULL_END
	/*
	* Copyright 2015 The WebRTC project authors. All Rights Reserved.
	*
	* Use of this source code is governed by a BSD-style license
	* that can be found in the LICENSE file in the root of the source
	* tree. An additional intellectual property rights grant can be found
	* in the file PATENTS. All contributing project authors may
	* be found in the AUTHORS file in the root of the source tree.
	*/

	#import <Foundation/Foundation.h>

	#import "RTCCertificate.h"
	#import "RTCCryptoOptions.h"
	#import "RTCMacros.h"

	@class RTC_OBJC_TYPE(RTCIceServer);

	/**
	* Represents the ice transport policy. This exposes the same states in C++,
	* which include one more state than what exists in the W3C spec.
	*/
	typedef NS_ENUM(NSInteger, RTCIceTransportPolicy) {
	RTCIceTransportPolicyNone,
	RTCIceTransportPolicyRelay,
	RTCIceTransportPolicyNoHost,
	RTCIceTransportPolicyAll
	};

	/** Represents the bundle policy. */
	typedef NS_ENUM(NSInteger, RTCBundlePolicy) {
	RTCBundlePolicyBalanced,
	RTCBundlePolicyMaxCompat,
	RTCBundlePolicyMaxBundle
	};

	/** Represents the rtcp mux policy. */
	typedef NS_ENUM(NSInteger, RTCRtcpMuxPolicy) { RTCRtcpMuxPolicyNegotiate, RTCRtcpMuxPolicyRequire };

	/** Represents the tcp candidate policy. */
	typedef NS_ENUM(NSInteger, RTCTcpCandidatePolicy) {
	RTCTcpCandidatePolicyEnabled,
	RTCTcpCandidatePolicyDisabled
	};

	/** Represents the candidate network policy. */
	typedef NS_ENUM(NSInteger, RTCCandidateNetworkPolicy) {
	RTCCandidateNetworkPolicyAll,
	RTCCandidateNetworkPolicyLowCost
	};

	/** Represents the continual gathering policy. */
	typedef NS_ENUM(NSInteger, RTCContinualGatheringPolicy) {
	RTCContinualGatheringPolicyGatherOnce,
	RTCContinualGatheringPolicyGatherContinually
	};

	/** Represents the encryption key type. */
	typedef NS_ENUM(NSInteger, RTCEncryptionKeyType) {
	RTCEncryptionKeyTypeRSA,
	RTCEncryptionKeyTypeECDSA,
	};

	/** Represents the chosen SDP semantics for the RTCPeerConnection. */
	typedef NS_ENUM(NSInteger, RTCSdpSemantics) {
	// TODO(https://crbug.com/webrtc/13528): Remove support for Plan B.
	RTCSdpSemanticsPlanB,
	RTCSdpSemanticsUnifiedPlan,
	};

	NS_ASSUME_NONNULL_BEGIN

	RTC_OBJC_EXPORT
	@interface RTC_OBJC_TYPE (RTCConfiguration) : NSObject

	/** If true, allows DSCP codes to be set on outgoing packets, configured using
	* networkPriority field of RTCRtpEncodingParameters. Defaults to false.
	*/
	@property(nonatomic, assign) BOOL enableDscp;

	/** An array of Ice Servers available to be used by ICE. */
	@property(nonatomic, copy) NSArray<RTC_OBJC_TYPE(RTCIceServer) > iceServers;

	/** An RTCCertificate for 're' use. */
	@property(nonatomic, nullable) RTC_OBJC_TYPE(RTCCertificate) * certificate;

	/** Which candidates the ICE agent is allowed to use. The W3C calls it
	* `iceTransportPolicy`, while in C++ it is called `type`. */
	@property(nonatomic, assign) RTCIceTransportPolicy iceTransportPolicy;

	/** The media-bundling policy to use when gathering ICE candidates. */
	@property(nonatomic, assign) RTCBundlePolicy bundlePolicy;

	/** The rtcp-mux policy to use when gathering ICE candidates. */
	@property(nonatomic, assign) RTCRtcpMuxPolicy rtcpMuxPolicy;
	@property(nonatomic, assign) RTCTcpCandidatePolicy tcpCandidatePolicy;
	@property(nonatomic, assign) RTCCandidateNetworkPolicy candidateNetworkPolicy;
	@property(nonatomic, assign) RTCContinualGatheringPolicy continualGatheringPolicy;

	/** If set to YES, don't gather IPv6 ICE candidates on Wi-Fi.
	* Only intended to be used on specific devices. Certain phones disable IPv6
	* when the screen is turned off and it would be better to just disable the
	* IPv6 ICE candidates on Wi-Fi in those cases.
	* Default is NO.
	*/
	@property(nonatomic, assign) BOOL disableIPV6OnWiFi;

	/** By default, the PeerConnection will use a limited number of IPv6 network
	* interfaces, in order to avoid too many ICE candidate pairs being created
	* and delaying ICE completion.
	*
	* Can be set to INT_MAX to effectively disable the limit.
	*/
	@property(nonatomic, assign) int maxIPv6Networks;

	/** Exclude link-local network interfaces
	* from considertaion for gathering ICE candidates.
	* Defaults to NO.
	*/
	@property(nonatomic, assign) BOOL disableLinkLocalNetworks;

	@property(nonatomic, assign) int audioJitterBufferMaxPackets;
	@property(nonatomic, assign) BOOL audioJitterBufferFastAccelerate;
	@property(nonatomic, assign) int iceConnectionReceivingTimeout;
	@property(nonatomic, assign) int iceBackupCandidatePairPingInterval;

	/** Key type used to generate SSL identity. Default is ECDSA. */
	@property(nonatomic, assign) RTCEncryptionKeyType keyType;

	/** ICE candidate pool size as defined in JSEP. Default is 0. */
	@property(nonatomic, assign) int iceCandidatePoolSize;

	/** Prune turn ports on the same network to the same turn server.
	* Default is NO.
	*/
	@property(nonatomic, assign) BOOL shouldPruneTurnPorts;

	/** If set to YES, this means the ICE transport should presume TURN-to-TURN
	* candidate pairs will succeed, even before a binding response is received.
	*/
	@property(nonatomic, assign) BOOL shouldPresumeWritableWhenFullyRelayed;

	/* This flag is only effective when `continualGatheringPolicy` is
	* RTCContinualGatheringPolicyGatherContinually.
	*
	* If YES, after the ICE transport type is changed such that new types of
	* ICE candidates are allowed by the new transport type, e.g. from
	* RTCIceTransportPolicyRelay to RTCIceTransportPolicyAll, candidates that
	* have been gathered by the ICE transport but not matching the previous
	* transport type and as a result not observed by PeerConnectionDelegateAdapter,
	* will be surfaced to the delegate.
	*/
	@property(nonatomic, assign) BOOL shouldSurfaceIceCandidatesOnIceTransportTypeChanged;

	/** If set to non-nil, controls the minimal interval between consecutive ICE
	* check packets.
	*/
	@property(nonatomic, copy, nullable) NSNumber *iceCheckMinInterval;

	/**
	* Configure the SDP semantics used by this PeerConnection. By default, this
	* is RTCSdpSemanticsUnifiedPlan which is compliant to the WebRTC 1.0
	* specification. It is possible to overrwite this to the deprecated
	* RTCSdpSemanticsPlanB SDP format, but note that RTCSdpSemanticsPlanB will be
	* deleted at some future date, see https://crbug.com/webrtc/13528.
	*
	* RTCSdpSemanticsUnifiedPlan will cause RTCPeerConnection to create offers and
	* answers with multiple m= sections where each m= section maps to one
	* RTCRtpSender and one RTCRtpReceiver (an RTCRtpTransceiver), either both audio
	* or both video. This will also cause RTCPeerConnection to ignore all but the
	* first a=ssrc lines that form a Plan B stream.
	*
	* RTCSdpSemanticsPlanB will cause RTCPeerConnection to create offers and
	* answers with at most one audio and one video m= section with multiple
	* RTCRtpSenders and RTCRtpReceivers specified as multiple a=ssrc lines within
	* the section. This will also cause RTCPeerConnection to ignore all but the
	* first m= section of the same media type.
	*/
	@property(nonatomic, assign) RTCSdpSemantics sdpSemantics;

	/** Actively reset the SRTP parameters when the DTLS transports underneath are
	* changed after offer/answer negotiation. This is only intended to be a
	* workaround for crbug.com/835958
	*/
	@property(nonatomic, assign) BOOL activeResetSrtpParams;

	/**
	* Defines advanced optional cryptographic settings related to SRTP and
	* frame encryption for native WebRTC. Setting this will overwrite any
	* options set through the PeerConnectionFactory (which is deprecated).
	*/
	@property(nonatomic, nullable) RTC_OBJC_TYPE(RTCCryptoOptions) * cryptoOptions;

	/**
	* An optional string that will be attached to the TURN_ALLOCATE_REQUEST which
	* which can be used to correlate client logs with backend logs.
	*/
	@property(nonatomic, nullable, copy) NSString *turnLoggingId;

	/**
	* Time interval between audio RTCP reports.
	*/
	@property(nonatomic, assign) int rtcpAudioReportIntervalMs;

	/**
	* Time interval between video RTCP reports.
	*/
	@property(nonatomic, assign) int rtcpVideoReportIntervalMs;

	/**
	* Allow implicit rollback of local description when remote description
	* conflicts with local description.
	* See: https://w3c.github.io/webrtc-pc/#dom-peerconnection-setremotedescription
	*/
	@property(nonatomic, assign) BOOL enableImplicitRollback;

	/**
	* Control if "a=extmap-allow-mixed" is included in the offer.
	* See: https://www.chromestatus.com/feature/6269234631933952
	*/
	@property(nonatomic, assign) BOOL offerExtmapAllowMixed;

	/**
	* Defines the interval applied to ALL candidate pairs
	* when ICE is strongly connected, and it overrides the
	* default value of this interval in the ICE implementation;
	*/
	@property(nonatomic, copy, nullable) NSNumber *iceCheckIntervalStrongConnectivity;

	/**
	* Defines the counterpart for ALL pairs when ICE is
	* weakly connected, and it overrides the default value of
	* this interval in the ICE implementation
	*/
	@property(nonatomic, copy, nullable) NSNumber *iceCheckIntervalWeakConnectivity;

	/**
	* The min time period for which a candidate pair must wait for response to
	* connectivity checks before it becomes unwritable. This parameter
	* overrides the default value in the ICE implementation if set.
	*/
	@property(nonatomic, copy, nullable) NSNumber *iceUnwritableTimeout;

	/**
	* The min number of connectivity checks that a candidate pair must sent
	* without receiving response before it becomes unwritable. This parameter
	* overrides the default value in the ICE implementation if set.
	*/
	@property(nonatomic, copy, nullable) NSNumber *iceUnwritableMinChecks;

	/**
	* The min time period for which a candidate pair must wait for response to
	* connectivity checks it becomes inactive. This parameter overrides the
	* default value in the ICE implementation if set.
	*/
	@property(nonatomic, copy, nullable) NSNumber *iceInactiveTimeout;

	- (instancetype)init;

	@end

	NS_ASSUME_NONNULL_END