DNS lookup of IPv6-only hosts fails #6940
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@baulig this looks quite serious/ugly I think we should try to get it into 2017-12 |
@baulig any update on this? |
alexischr
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The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 12, 2018
The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 15, 2018
The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 15, 2018
The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 15, 2018
The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 15, 2018
The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 16, 2018
The obsolete property was always set to false. Fixes mono#6940
alexischr
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Mar 16, 2018
[System.Net] Replace use of obsolete `SupportsIPv6` property.
Thank you for figuring out the issue @TekkiWuff ! |
alexischr
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The obsolete property was always set to false. Fixes #6940
alexischr
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Mar 19, 2018
The obsolete property was always set to false. Fixes #6940
jonpryor
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Mar 22, 2018
Context: mono/mono#6940 Context: mono/mono#7093 Context: mono/mono#7364 Context: mono/mono#7378 Context: mono/mono#7535 Context: mono/mono#7637 Context: mono/mono#7696
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Context: mono/mono#6940 Context: mono/mono#7093 Context: mono/mono#7364 Context: mono/mono#7378 Context: mono/mono#7535 Context: mono/mono#7637 Context: mono/mono#7696
jonpryor
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Context: mono/mono#6940 Context: mono/mono#7093 Context: mono/mono#7364 Context: mono/mono#7378 Context: mono/mono#7535 Context: mono/mono#7637 Context: mono/mono#7696
jonpryor
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Bumps to Java.Interop/master/0afb2b0f Bumps to llvm/master/a9cfb50e. Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=11771 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=15051 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=19436 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=45901 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=56071 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58413 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58413 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=58413 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=59184 fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60065 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60225 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60298 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60359 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60568 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60756 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60848 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60862 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60900 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60904 Fixes: https://bugzilla.xamarin.com/show_bug.cgi?id=60986 Fixes: https://github.com/mono/mono/issues/59400 Fixes: mono/mono#6169 Fixes: mono/mono#6187 Fixes: mono/mono#6192 Fixes: mono/mono#6255 Fixes: mono/mono#6264 Fixes: mono/mono#6266 Fixes: mono/mono#6281 Fixes: mono/mono#6283 Fixes: mono/mono#6320 Fixes: mono/mono#6339 Fixes: mono/mono#6343 Fixes: mono/mono#6349 Fixes: mono/mono#6379 Fixes: mono/mono#6383 Fixes: mono/mono#6401. Fixes: mono/mono#6411 Fixes: mono/mono#6414 Fixes: mono/mono#6490 Fixes: mono/mono#6721 Fixes: mono/mono#6767 Fixes: mono/mono#6777 Fixes: mono/mono#6848 Fixes: mono/mono#6940 Fixes: mono/mono#6948 Fixes: mono/mono#6998 Fixes: mono/mono#7016 Fixes: mono/mono#7085 Fixes: mono/mono#7086 Fixes: mono/mono#7095 Fixes: mono/mono#7137 Fixes: mono/mono#7184 Fixes: mono/mono#7240 Fixes: mono/mono#7262 Fixes: mono/mono#7289 Fixes: mono/mono#7338 Fixes: mono/mono#7356 Fixes: mono/mono#7364 Fixes: mono/mono#7378 Fixes: mono/mono#7389 Fixes: mono/mono#7460 Fixes: mono/mono#7535 Fixes: mono/mono#7536 Fixes: mono/mono#7610 Fixes: mono/mono#7624 Fixes: mono/mono#7637 Fixes: mono/mono#7655 Fixes: mono/mono#7657 Fixes: mono/mono#7685 Fixes: mono/mono#7786 Fixes: mono/mono#7792 Fixes: mono/mono#7822 Fixes: mono/mono#7860 Fixes: mono/mono#8089 Fixes: mono/mono#8267 Fixes: mono/mono#8409 Fixes: xamarin/maccore#628 Fixes: xamarin/maccore#629 Fixes: xamarin/maccore#673 Fixes: xamarin/maccore#673 Fixes: #1561
jonpryor
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Fixes: #1130 Fixes: #1561 (comment) Fixes: #1845 Fixes: #1951 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=10087 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=11771 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=12850 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=18941 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=19436 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=25444 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=33208 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=58413 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=59184 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=59400 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=59779 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=60065 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=60843 Context: mono/mono#6174 Context: mono/mono#6178 Context: mono/mono#6180 Context: mono/mono#6181 Context: mono/mono#6186 Context: mono/mono#6187 Context: mono/mono#6211 Context: mono/mono#6266 Context: mono/mono#6579 Context: mono/mono#6666 Context: mono/mono#6752 Context: mono/mono#6801 Context: mono/mono#6812 Context: mono/mono#6848 Context: mono/mono#6940 Context: mono/mono#6948 Context: mono/mono#6998 Context: mono/mono#6999 Context: mono/mono#7016 Context: mono/mono#7085 Context: mono/mono#7086 Context: mono/mono#7095 Context: mono/mono#7134 Context: mono/mono#7137 Context: mono/mono#7145 Context: mono/mono#7184 Context: mono/mono#7240 Context: mono/mono#7262 Context: mono/mono#7289 Context: mono/mono#7338 Context: mono/mono#7356 Context: mono/mono#7364 Context: mono/mono#7378 Context: mono/mono#7389 Context: mono/mono#7449 Context: mono/mono#7460 Context: mono/mono#7535 Context: mono/mono#7536 Context: mono/mono#7537 Context: mono/mono#7565 Context: mono/mono#7588 Context: mono/mono#7596 Context: mono/mono#7610 Context: mono/mono#7613 Context: mono/mono#7620 Context: mono/mono#7624 Context: mono/mono#7637 Context: mono/mono#7655 Context: mono/mono#7657 Context: mono/mono#7661 Context: mono/mono#7685 Context: mono/mono#7696 Context: mono/mono#7729 Context: mono/mono#7786 Context: mono/mono#7792 Context: mono/mono#7805 Context: mono/mono#7822 Context: mono/mono#7828 Context: mono/mono#7860 Context: mono/mono#7864 Context: mono/mono#7903 Context: mono/mono#7920 Context: mono/mono#8089 Context: mono/mono#8143 Context: mono/mono#8267 Context: mono/mono#8311 Context: mono/mono#8340 Context: mono/mono#8409 Context: mono/mono#8417 Context: mono/mono#8430 Context: mono/mono#8698 Context: mono/mono#8701 Context: mono/mono#8712 Context: mono/mono#8721 Context: mono/mono#8726 Context: mono/mono#8866 Context: mono/mono#9023 Context: mono/mono#9031 Context: mono/mono#9033 Context: mono/mono#9044 Context: mono/mono#9179 Context: mono/mono#9318 Context: mono/mono#9318 Context: xamarin/maccore#628 Context: xamarin/maccore#629 Context: xamarin/maccore#673
jonpryor
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Fixes: #1130 Fixes: #1561 (comment) Fixes: #1845 Fixes: #1951 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=10087 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=11771 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=12850 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=18941 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=19436 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=25444 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=33208 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=58413 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=59184 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=59400 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=59779 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=60065 Context: https://bugzilla.xamarin.com/show_bug.cgi?id=60843 Context: mono/mono#6174 Context: mono/mono#6178 Context: mono/mono#6180 Context: mono/mono#6181 Context: mono/mono#6186 Context: mono/mono#6187 Context: mono/mono#6211 Context: mono/mono#6266 Context: mono/mono#6579 Context: mono/mono#6666 Context: mono/mono#6752 Context: mono/mono#6801 Context: mono/mono#6812 Context: mono/mono#6848 Context: mono/mono#6940 Context: mono/mono#6948 Context: mono/mono#6998 Context: mono/mono#6999 Context: mono/mono#7016 Context: mono/mono#7085 Context: mono/mono#7086 Context: mono/mono#7095 Context: mono/mono#7134 Context: mono/mono#7137 Context: mono/mono#7145 Context: mono/mono#7184 Context: mono/mono#7240 Context: mono/mono#7262 Context: mono/mono#7289 Context: mono/mono#7338 Context: mono/mono#7356 Context: mono/mono#7364 Context: mono/mono#7378 Context: mono/mono#7389 Context: mono/mono#7449 Context: mono/mono#7460 Context: mono/mono#7535 Context: mono/mono#7536 Context: mono/mono#7537 Context: mono/mono#7565 Context: mono/mono#7588 Context: mono/mono#7596 Context: mono/mono#7610 Context: mono/mono#7613 Context: mono/mono#7620 Context: mono/mono#7624 Context: mono/mono#7637 Context: mono/mono#7655 Context: mono/mono#7657 Context: mono/mono#7661 Context: mono/mono#7685 Context: mono/mono#7696 Context: mono/mono#7729 Context: mono/mono#7786 Context: mono/mono#7792 Context: mono/mono#7805 Context: mono/mono#7822 Context: mono/mono#7828 Context: mono/mono#7860 Context: mono/mono#7864 Context: mono/mono#7903 Context: mono/mono#7920 Context: mono/mono#8089 Context: mono/mono#8143 Context: mono/mono#8267 Context: mono/mono#8311 Context: mono/mono#8340 Context: mono/mono#8409 Context: mono/mono#8417 Context: mono/mono#8430 Context: mono/mono#8698 Context: mono/mono#8701 Context: mono/mono#8712 Context: mono/mono#8721 Context: mono/mono#8726 Context: mono/mono#8866 Context: mono/mono#9023 Context: mono/mono#9031 Context: mono/mono#9033 Context: mono/mono#9044 Context: mono/mono#9179 Context: mono/mono#9318 Context: mono/mono#9318 Context: xamarin/maccore#628 Context: xamarin/maccore#629 Context: xamarin/maccore#673
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Steps to Reproduce
ipv6.google.com
in a browserCurrent Behavior
The DNS lookup does not return any IPv6 addresses and fails with an exception for IPv6-only hosts.
Expected Behavior
The DNS lookup returns all IPv6 addresses associated with the hostname.
On which platforms did you notice this
[ ] macOS
[x] Linux
[ ] Windows
Version Used:
Installed from repository as described here http://www.mono-project.com/download/#download-lin
Stacktrace
Further details
The (obsolote)
Socket.SupportsIPv6
gets always initialised withfalse
here for the PAL (FEATURE_PAL
)mono/mcs/class/referencesource/System/net/System/Net/Sockets/Socket.cs
Lines 6072 to 6073 in 0bcbe39
As visible in the Stacktrace,
System.Net.Dns.hostent_to_IPHostEntry
is called at some point during the execution. It iterates over all addresses and removes IPv6 addresses based on the value ofSocket.SupportsIPv6
.mono/mcs/class/System/System.Net/Dns.cs
Lines 323 to 327 in 4fa0463
For IPv6-only hosts this results in an empty list which then throws an exception
mono/mcs/class/System/System.Net/Dns.cs
Lines 337 to 338 in 4fa0463
Interestingly the not obsolete
Socket.OSSupportsIPv6
returntrue
Setting
Socket.SupportsIPv6
to true via reflection fixes the issue. Tested DNS lookups and WebRequests (see example code below)I'm not sure about the correct solution though, since I have no deeper knowledge of internals of Mono. Maybe it's enough to use
Socket.OSSupportsIPv6
instead ofSocket.SupportsIPv6
inSystem.Net.Dns.hostent_to_IPHostEntry
?Complete test code
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