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Created attachment 6407 [details]
Bug fix patch
The IPv6 address parser misses some syntax errors, and can become confused by addresses that at first glance look IPv4 compatible. The attach patch contains the following fixes:
Don't fail to parse an address if we mistakenly thought it was IPv4 compatible or mapped, just treat it as IPv6.
Fix IPv4-compatible and mapped address formatting in ToString().
Fix parsing of colons - specifically occurrences of ':::'.
Make sure blocks of digits are no longer than 4 characters.
Add some more parsing tests to Mono's NUnit test suite.
Add a NUnit test for bogus IPv6 addresses.
Could you turn this into a pull request?
I could push it myself if that would be easier
It does not seem like the patch was ever committed, I hand applied it