DNS reqests then using ECH

[Orbit173]

When using flag --tls-ech-enable, wstunnel makes 3 DNS requests 1 HTTPS, 1 A and 1 AAAA.
I think A and AAAA requests are superfluous, since HTTPS already contains addresses for connecting:

Standard query 0xf3fa HTTPS example.com
Standard query response 0xf3fa HTTPS example.com HTTPS OPT
Standard query 0xe230 A example.com
Standard query 0x07c2 AAAA example.com
Standard query response 0xe230 A example.com A 172.......
Standard query response 0x07c2 AAAA example.com AAAA 2606:.......

   Answers
        example.com: type HTTPS, class IN
            Name: example.com
            Type: HTTPS (65) (HTTPS Specific Service Endpoints)
            Class: IN (0x0001)
            Time to live: 173 (2 minutes, 53 seconds)
            Data length: 136
            SvcPriority: 1
            TargetName: <Root>
            SvcParam: alpn=h3,h2
            SvcParam: ipv4hint=104.........
                SvcParamKey: ipv4hint (4)
                SvcParamValue length: 8
                IP: 104.........
                IP: 172.........
            SvcParam: ech
                SvcParamKey: ech (5)
                SvcParamValue length: 71
                ECHConfigList length: 69
                ECHConfig: id=241 cloudflare-ech.com
                    Version: 0xfe0d
                    Length: 65
                    HPKE Key Config
                        Config Id: 241
                        KEM Id: DHKEM(X25519, HKDF-SHA256) (32)
                        Public Key length: 32
                        Public Key: ................
                        Cipher Suites length: 4
                        Cipher Suites (1 suite)
                    Maximum Name Length: 0
                    Public Name length: 18
                    Public Name: cloudflare-ech.com
                    Extensions length: 0
            SvcParam: ipv6hint=2606:.......
                SvcParamKey: ipv6hint (6)
                SvcParamValue length: 32
                IP: 2606:.........
                IP: 2606:..........

Your wstunnel setup

• client:

./wstunnel client --log-lvl INFO --http-headers='host: example.com' -L 'tcp://1443:127.0.0.1:1443' --http-upgrade-path-prefix "123" --tls-ech-enable --tls-verify-certificate wss://example.com:443

• server:

./wstunnel server wss://0.0.0.0:443 --restrict-http-upgrade-path-prefix "123" --restrict-to "127.0.0.1:4444" --tls-certificate "/opt/ssl/ssl.pem" --tls-private-key "/opt/ssl/ssl.key"

Desktop:

• OS: Debian 12 amd64