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arvidn / libtorrent

an efficient feature complete C++ bittorrent implementation
http://libtorrent.org
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libtorrent query dns records from the wrong network interface #6870

Closed Masaiki closed 2 years ago

Masaiki commented 2 years ago

Please provide the following information

libtorrent version (or branch): qbittorrent4.3.9 & libtorrent RC_1_2 https://github.com/arvidn/libtorrent/commit/c05affe19ccbc02ae53434f957ccb15d1e7d3fe0 platform/architecture: windows10 22h2/x64 compiler and compiler version: Visual Studio 2019 v16.11.14 please describe what symptom you see, what you would expect to see instead and how to reproduce it. i have two net interface one is wired NIC, the other is a virtual net interface created by https://github.com/Fndroid/clash_for_windows_pkg using wintun named "clash" dns query from the "clash" with return ip of 198.18.0.1/16 which could only be accessed by "clash" i have specified the wired NIC and all its addresses in qbittorrent now DHT works well with latest commit and all the tracker shows "skipping tracker announce (unreachable)" i guess it get the ip of 198.18.0.1/16 for querying dns records from the wrong network interface

Masaiki commented 2 years ago

if proxy is enabled ( i use socks5 here ), tracker works well, but dht will be down.

arvidn commented 2 years ago

normal APIs to resolve hostnames don't support options to BINDTODEVICE, to make requests over a specific interface. Do you have any other programs that make DNS requests via both interfaces?

Masaiki commented 2 years ago

as far as i know, node could be one (https://github.com/nodejs/node/commit/3e10ce30b471214cc5020a92d628357e9ed4fb91), there may be more on linux platform

AllSeeingEyeTolledEweSew commented 2 years ago

Looks like node internally uses c-ares to support this case. I guess it has a lot of support. Should libtorrent use it?

Masaiki commented 2 years ago

Looks like node internally uses c-ares to support this case. I guess it has a lot of support. Should libtorrent use it?

i agree with this

stale[bot] commented 2 years ago

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.