Codex/dns refresh upstream on reconnect

[MFSGA]

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• Bug fix
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• Test Case
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💡 Background and solution

📝 Changelog

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Proxy Throughput Results

Trojan

Transport	Payload	Runs	Upload Mbps	Download Mbps
tcp	32 MB	3	17810.7 +/- 530.7	17912.1 +/- 414.5
ws	32 MB	3	15957.1 +/- 2472.7	17257.6 +/- 2254.7
tcp-netem	32 MB	3	15342.5 +/- 4016.8	17599.5 +/- 9713.8

VLESS

Transport	Payload	Runs	Upload Mbps	Download Mbps
tcp	32 MB	3	13652.9 +/- 8965.1	17942.9 +/- 4573.9
ws	32 MB	3	14457.8 +/- 2264.6	17840.2 +/- 2091.7

Hysteria2

Transport	Payload	Runs	Upload Mbps	Download Mbps
plain	32 MB	3	12538.0 +/- 3262.2	11656.8 +/- 4073.2
salamander	32 MB	3	11078.6 +/- 6215.5	11434.6 +/- 719.7
plain-netem	32 MB	3	13346.2 +/- 7296.1	13362.6 +/- 2423.3

SOCKS5

Transport	Payload	Runs	Upload Mbps	Download Mbps
auth	32 MB	3	12794.2 +/- 604.9	12699.6 +/- 2346.8
noauth	32 MB	3	9243.3 +/- 1043.8	10125.6 +/- 6255.5

ANYTLS

Transport	Payload	Runs	Upload Mbps	Download Mbps
tls	32 MB	3	12252.6 +/- 6562.3	14028.7 +/- 580.8

SS

Transport	Payload	Runs	Upload Mbps	Download Mbps
plain	32 MB	3	14402.6 +/- 2401.1	16865.1 +/- 688.2
obfs-http	32 MB	3	17043.2 +/- 3002.8	14889.9 +/- 3527.5
obfs-tls	32 MB	3	14035.8 +/- 4527.9	13283.2 +/- 2169.6
plain-netem	32 MB	3	8848.7 +/- 5557.3	11373.0 +/- 2661.3
v2ray-plugin-ws-tls	32 MB	3	17770.7 +/- 638.1	17633.2 +/- 312.8
shadow-tls-v3	32 MB	3	15261.2 +/- 3145.0	14369.4 +/- 2572.4

Test Environment

OS	Linux 6.17.0-1020-azure
Architecture	x86_64
Kernel	6.17.0-1020-azure
CPU	AMD EPYC 7763 64-Core Processor
CPU Cores	4
Memory GB	15.61
Docker	28.0.4
Rust	rustc 1.97.1 (8bab26f4f 2026-07-14)

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Full test log

Download the throughput-results artifact from the workflow run for the full log.