ipv6 is being used on a client machine when not supported

[jwendel]

Version and Runtime

Version: v12.11.1
Commit: 6fbe391
Runtime: go1.20.8 windows/amd64
Date: 2023-10-02T09:05:14Z+0000

Expected Behaviour

attack to work

Actual Behaviour

Errors related to IPv6.

>vegeta report caddy.bin
Requests      [total, rate, throughput]         801687, 26706.74, 19.04
Duration      [total, attack, wait]             30.153s, 30.018s, 134.511ms
Latencies     [min, mean, 50, 90, 95, 99, max]  29.999ms, 165.779ms, 171.123ms, 245.474ms, 281.241ms, 583.789ms, 1.44s
Bytes In      [total, mean]                     661822, 0.83
Bytes Out     [total, mean]                     0, 0.00
Success       [ratio]                           0.07%
Status Codes  [code:count]                      0:801113  200:574
Error Set:
Get "https://is.xivup.com/v2indexdata": dial tcp 0.0.0.0:0->[2600:3c00::f03c:92ff:fef2:8edf]:443: connectex: A socket operation was attempted to an unreachable network.

Steps to Reproduce

host.txt:

GET https://is.xivup.com/v2indexdata
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Referer: https://is.xivup.com/v2
Sec-Ch-Ua: "Not_A Brand";v="8", "Chromium";v="120", "Google Chrome";v="120"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

1. command: cat host.txt | vegeta attack -workers 1000 -rate 0 -max-workers 6000 -http2=false -keepalive=false -duration=30s

Additional Context

I'm on a Windows 10 machine that does not have an IPv6 internet connection. The host I'm trying to connect to advertises both A and AAAA records. It seems Vegeta is picking IPv6 network address much of the time, which results in errors.

I also downgraded to v12.11.0 and the above problem went away. Though, I now get a crash 50% of the time, which looks exactly like #649. 6fbe391 seems to have fixed the crashing if the order of IP addresses come in different orders, but it seems Vegeta will cache only the IPv6 address in some cases, which causes near 100% error rate.

[penghian]

im having the same issue your suggestion of downgrading works for me thanks