Force IPv4 ping in ServerStart.bat when using DNS resolution #89
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Ping does not respond with a TTL if the server responds with an IPv6 address. This essentially means that the script will think the user does not have internet, if they have a public IPv6 address. Forcing IPv4 in the ping command, ensures TTL gets returned, and the startup can proceed. This issue is only relevant in the batch script, as that is the only script that asserts on TTL being present in the output. It is also only an issue when pinging minecraftforge.net, as that relies on DNS resolution. This means the output differs if the DNS server returns IPv4 (the A record) or IPv6 (the AAAA record). Closes AllTheMods#88
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Ping does not respond with a TTL if the server responds with an IPv6
address. This essentially means that the script will think the user does
not have internet, if they have a public IPv6 address. Forcing IPv4 in
the ping command, ensures TTL gets returned, and the startup can
proceed.
This issue is only relevant in the batch script, as that is the only
script that asserts on TTL being present in the output. It is also only
an issue when pinging minecraftforge.net, as that relies on DNS
resolution. This means the output differs if the DNS server returns IPv4
(the A record) or IPv6 (the AAAA record).
Closes #88