How to change the QUIC version in Cronet ? I want the h3-29

Sumin Duan

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Dec 4, 2020, 12:44:02 AM12/4/20

to QUIC Prototype Protocol Discussion group

I run the cronet native sample, but its QUIC version is "gQUIC"( google Q050), not the IETF draft.

I want an IETF draft version of QUIC (eg:h3-29) instead of a Google QUIC version.

How I can change the QUIC version?

Nick Harper

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Dec 4, 2020, 1:55:03 AM12/4/20

to proto...@chromium.org

You'll need a "QUIC": {"quic_version": "h3-29"} entry in your experimental options JSON dictionary.

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Sumin Duan

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Dec 4, 2020, 4:01:10 AM12/4/20

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Thx， after adding this sentence:

Cronet_EngineParams_experimental_options_set(engine_params,"{\"QUIC\":{\"quic_version\":\"h3-29\"}}");

in CreateCronetEngine(), the version in client hello is Version: draft-29 (0xff00001d).

But fail to connect the server.

Sumin Duan

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Dec 4, 2020, 4:59:15 AM12/4/20

to QUIC Prototype Protocol Discussion group, Sumin Duan, nha...@chromium.org

Fail to connect the server:

Frame 8776: 88 bytes on wire (704 bits), 88 bytes captured (704 bits) on interface lo0, id 0

Null/Loopback

Internet Protocol Version 6, Src: ::1, Dst: ::1

User Datagram Protocol, Src Port: 9005, Dst Port: 62934

QUIC IETF

QUIC Connection information

[Packet Length: 36]

1... .... = Header Form: Long Header (1)

.1.. .... = Fixed Bit: True

..00 .... = Packet Type: Initial (0)

.... 00.. = Reserved: 0

.... ..01 = Packet Number Length: 2 bytes (1)

Version: draft-29 (0xff00001d)

Destination Connection ID Length: 0

Source Connection ID Length: 4

Source Connection ID: 707156c3

Token Length: 0

Length: 23

Packet Number: 1

Payload: be8c622ea5f7cd7392ad3c8bd1e7dd99c4a27c69a4

CONNECTION_CLOSE (Transport) Error code: CRYPTO_ERROR (Internal Error)

Frame Type: CONNECTION_CLOSE (Transport) (0x000000000000001c)

Error code: CRYPTO_ERROR (336)

TLS Alert Description: Internal Error (80)

Frame Type: 0

Reason phrase Length: 0

Reason phrase:

Su

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Dec 8, 2020, 2:50:23 AM12/8/20

to QUIC Prototype Protocol Discussion group, Su, nha...@chromium.org

it's my fault. I set up a proxy. Drop the proxy, then it works

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