minq -- A minimal QUIC stack

Minq is a minimal implementation of QUIC, as documented at https://quicwg.github.io/. Minq partly implements draft-05 (it advertises -04 but it's actually more like the editor's copy) with TLS 1.3 draft-20 or draft-21.

Currently it will do:

• A 1-RTT handshake (with self-generated and unverified certificates)
• Some ACK processing
• Primitive retransmission (manual, no timers)
• 1-RTT application data
• Exchange of stream close (though this doesn't really have much impact)

Important missing pieces for the first implementation draft include:

• Handling ACK ranges
• Real timeout and retransmission support

Other defects include:

• Doesn't properly clean up state, so things will just grow without bound
• TLS configuration and verification
• A huge other pile of unknown and known defects.

WARNING

Minq is absolutely not suitable for any kind of production use and should only be used for testing. In particular, it explicitly doesn't validate certificates.

Quick Start (untested but should be rightish)

cd ${GOPATH}/src
go get github.com/ekr/minq
cd github.com/bifurcation/mint
git remote add ekr https://github.com/ekr/mint
git fetch ekr
git checkout ekr/quic_record_layer
cd ../../ekr/minq
go test

This should produce something like this:

Result =  010002616263
Result2 =  010002616263
Result =  0102616263
Result2 =  0102616263
{1 2 [97 98 99]}
{1 1 [8 16]}
{3 2 [8 16 24 32]}
Checking client state
Checking server state
Encoded frame  ab00deadbeef0000000000000001
Encoded frame  bb0100deadbeef00000000000000010e00000001
Result =  820123456789abcdefdeadbeefff000001
Result2 =  820123456789abcdefdeadbeefff000001
PASS
ok  	github.com/ekr/minq	1.285s

It's the "ok" at the end that's important.

There are two test programs that live in minq/bin/client and minq/bin/server. The server is an echo server that upcases the returned data. The client is just a passthrough.

In ${GOPATH}/src/github.com/ekr, doing

go run minq/bin/server/main.go
go run minq/bin/client/main.go

In separate windows should have the desired result.

Logging

To enable logging, set the MINQ_LOG environment variable, as in MINQ_LOG=connection go test. Valid values are:

// Pre-defined log types
const (
	logTypeAead       = "aead"
	logTypeCodec      = "codec"
	logTypeConnBuffer = "connbuffer"
	logTypeConnection = "connection"
	logTypeAck        = "ack"
	logTypeFrame      = "frame"
	logTypeHandshake  = "handshake"
	logTypeTls        = "tls"
	logTypeTrace      = "trace"
	logTypeServer     = "server"
	logTypeUdp        = "udp"
)

Multiple log levels can be separated by commas.

Mint

Minq depends on Mint (https://www.github.com/bifurcation/mint) for TLS. Right now we are on the following branch:

https://github.com/ekr/mint/tree/quic_record_layer

This branch is more experimental than usual.