Struct NumSctpStreams

pub struct NumSctpStreams {
    pub os: u16,
    pub mis: u16,
}

Number of SCTP streams.

Both OS and MIS are part of the SCTP INIT+ACK handshake. OS refers to the initial number of outgoing SCTP streams that the server side transport creates (to be used by DataConsumers), while MIS refers to the maximum number of incoming SCTP streams that the server side transport can receive (to be used by DataProducers). So, if the server side transport will just be used to create data producers (but no data consumers), OS can be low (~1). However, if data consumers are desired on the server side transport, OS must have a proper value and such a proper value depends on whether the remote endpoint supports SCTP_ADD_STREAMS extension or not.

libwebrtc (Chrome, Safari, etc) does not enable SCTP_ADD_STREAMS so, if data consumers are required, OS should be 1024 (the maximum number of DataChannels that libwebrtc enables).

Firefox does enable SCTP_ADD_STREAMS so, if data consumers are required, OS can be lower (16 for instance). The mediasoup transport will allocate and announce more outgoing SCTP streams when needed.

mediasoup-client provides specific per browser/version OS and MIS values via the device.sctpCapabilities getter.

Fields

os: u16

Initially requested number of outgoing SCTP streams.

mis: u16

Maximum number of incoming SCTP streams.

Trait Implementations

impl Clone for NumSctpStreams

fn clone(&self) -> NumSctpStreams

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NumSctpStreams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for NumSctpStreams

fn default() -> Self

Returns the “default value” for a type.

impl Serialize for NumSctpStreams

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for NumSctpStreams