How to identify a specific STREAM on the peer side?

[chemsallioua]

I am making a Server and a Client based on MSQUIC. The Client opens a connection, the Server opens 6 unidirectional STREAMs and one bidirectional STREAM.

Now on the Client side, how can I identify which STREAM is the bidirectional one? What about identifying each of them?
Can I set a custom ID for the streams?

Thank you!

[nibanks]

The PEER_STREAM_STARTED event has the following:

QUIC_STREAM_OPEN_FLAGS Flags;

This tells you if it's bidirectional or unidirectional:

typedef enum QUIC_STREAM_OPEN_FLAGS {
    QUIC_STREAM_OPEN_FLAG_NONE              = 0x0000,
    QUIC_STREAM_OPEN_FLAG_UNIDIRECTIONAL    = 0x0001,   // Indicates the stream is unidirectional.
    QUIC_STREAM_OPEN_FLAG_0_RTT             = 0x0002,   // The stream was opened via a 0-RTT packet.
    QUIC_STREAM_OPEN_FLAG_DELAY_ID_FC_UPDATES = 0x0004, // Indicates stream ID flow control limit updates for the
                                                        // connection should be delayed to StreamClose.
} QUIC_STREAM_OPEN_FLAGS;

[chemsallioua]

Other than the bidirectional or not, how can I map them all individually from Server to Client?

[nibanks]

You can query the QUIC stream ID via GetParam.

[chemsallioua]

Yes, but the ID gets generated by the library, I do not have control over it. Right?

[nibanks]

Correct. If you want something your own, then you'll need to send it as payload.

[chemsallioua]

Okay clear. Thank you!