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Web. RTC 1. 0: Real- time Communication Between Browserscreate. Offer. The create. Offer method generates a blob of SDP that contains an RFC 3.

Media. Stream. Tracks attached to this. RTCPeer. Connection, the codec/RTP/RTCP capabilities supported by this implementation, and parameters of the ICE. DTLS connection. The options parameter may be supplied to provide additional control over the offer generated. Session descriptions generated by create. Offer. MUST be immediately usable by set.

Local. Description without causing an error as long as. Local. Description is called reasonably soon. If a system has limited resources (e. The session descriptions MUST remain usable by set. Local. Description without causing an error until at least the end of the fulfillment callback of the returned promise.

Creating the SDP MUST follow the appropriate process for generating an offer described in . As an offer, the generated SDP will contain the full set of codec/RTP/RTCP capabilities supported by the session (as opposed to an answer, which will include only a specific negotiated subset to use). In the event. create. Offer is called after the session is established, create. Offer will generate an offer that is compatible with the current session, incorporating any changes that have been made to the session since the last complete offer- answer exchange, such as addition or removal of tracks. If no changes have been made, the offer will include the capabilities of the current local description as well as any additional capabilities that could be negotiated in an updated offer.

The generated SDP will also contain the ICE agent's. Fragment. password and ICE options (as defined in . These certificate fingerprints are used in the construction of SDP and as input to requests for identity assertions. If the RTCPeer. Connection is configured to generate Identity assertions by calling. Identity. Provider, then the session description. SHALL contain an appropriate assertion.

The process of generating an SDP exposes a subset of the media capabilities of the underlying system, which provides generally persistent cross- origin information on the device. It thus increases the fingerprinting surface of the application. In privacy- sensitive contexts, browsers can consider mitigations such as generating SDP matching only a common subset of the capabilities. Redgate Sql Compare Serial Cracked. When the method is called, the user agent MUST run the following steps: Let connection be the.

RTCPeer. Connection object on which the method was invoked. If connection's . Like create. Offer, the returned blob of SDP contains descriptions of the local Media.

Stream. Tracks attached to this RTCPeer. Connection, the codec/RTP/RTCP options negotiated for this session, and any candidates that have been gathered by the ICE Agent. The. options parameter may be supplied to provide additional control over the generated answer. Session descriptions generated by create. Answer MUST be immediately usable by set. Local. Description without causing an error as long as set. Local. Description is called reasonably soon.

Like create. Offer, the returned description SHOULD reflect the current state of the system. The session descriptions MUST remain usable by. Local. Description without causing an error until at least the end of the fulfillment callback of the returned promise. The generation of the SDP MUST follow the appropriate process for generating an answer described in . These certificate fingerprints are used in the construction of SDP and as input to requests for identity assertions.

An answer can be marked as provisional, as described in. In order to successfully handle scenarios where the application wants to offer to change from one media format to a different, incompatible format, the RTCPeer.

Connection. MUST be able to simultaneously support use of both the current and pending local descriptions (e. As a result, when the method is invoked, the user agent MUST run the following steps. Let description be the first argument to.

Local. Description. Let last. Offer be the result returned by the last call to create. Offer. Let last. Answer be the result returned by the last call to create. Answer. If description. Answer. If description.

Offer. If description. Offer, reject the promise with a newly. Invalid. Modification. Error and abort these steps.

This API changes the local media state. When the method is invoked, the user agent MUST return the result of setting the. RTCSession. Description indicated by the method's first argument. Alternatively, if the. RTCPeer. Connection has previously authenticated the identity of the peer (that is, there is a current value for peer.

Identity ), then this also establishes a target peer identity. The target peer identity cannot be changed once set. Once set, if a different value is provided, the user agent MUST reject the returned promise with a newly. Invalid. Modification. Error and abort this operation. The RTCPeer. Connection.

MUST be closed if the validated peer identity does not match the target peer. If there is no target peer identity, then. Remote. Description does not await the completion of identity validation.

Parameter. Type. Nullable. Optional. Descriptiondescription. RTCSession. Description.

Init. This method can also be used to indicate the end of remote candidates when called with an empty string for the candidate member. The only members of the argument used by this method are candidate, sdp. Mid, sdp. MLine. Index, and.

When the method is invoked, the user agent MUST run the following steps: Let candidate be the method's argument. Let connection be the. RTCPeer. Connection object on which the method was invoked. If both sdp. Mid and sdp. MLine. Index are. Type. Error. Return the result of enqueuing the following steps. If remote. Description is.

Invalid. State. Error. Let p be a new promise. If candidate. sdp. Mid is not null, run the following steps: If candidate.

Mid is not equal to the mid of any media description in. Description, reject p with a newly. Operation. Error and abort these steps. Else, if candidate.

MLine. Index is not null, run the following steps: If candidate. MLine. Index is equal to or larger than the number of media descriptions in remote. Description, reject p with a newly. Operation. Error and abort these steps. If candidate. ufrag is neither. Operation. Error and abort these steps.

Use. candidate. ufrag to identify the ICE generation; if the ufrag is null, process the. ICE. generation. If.

ICE candidate. generation. If candidate could not be successfully added the user agent MUST queue a task that runs the following steps: If connection's .

A browser might be configured to use local or private STUN or TURN servers. This method allows an application to learn about these servers and optionally use them. This list is likely to be persistent and is the same across origins. It thus increases the fingerprinting surface of the browser.

In privacy- sensitive contexts, browsers can consider mitigations such as only providing this data to whitelisted origins (or not providing it at all.)No parameters. Return type: sequence< RTCIce. Server> get. Configuration. Returns a RTCConfiguration object representing the current configuration of this. RTCPeer. Connection object. When this method is called, the user agent MUST return the.

RTCConfiguration object stored in the . This includes changing the configuration of the ICE. Agent. As noted in . As defined in . If a script wants this to happen immediately, it should do an ICE restart. Set the ICE Agent's prefetched ICE candidate. If the new ICE candidate pool size changes the existing setting, this may result in immediate gathering of new pooled candidates, or discarding of existing pooled candidates, as defined in .

If the scheme name is not implemented by the browser, or if parsing based on the syntax defined in . If a script wants this to happen immediately, it should do an ICE restart.