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Re: [tor-bugs] #33157 [Circumvention/Snowflake]: Client generates SDP with "IN IP4 0.0.0.0", causing proxy to send "client_ip=0.0.0.0" and bridge to send "USERADDR 0.0.0.0:1"
#33157: Client generates SDP with "IN IP4 0.0.0.0", causing proxy to send
"client_ip=0.0.0.0" and bridge to send "USERADDR 0.0.0.0:1"
-------------------------------------+------------------------
Reporter: dcf | Owner: (none)
Type: defect | Status: new
Priority: Medium | Milestone:
Component: Circumvention/Snowflake | Version:
Severity: Normal | Resolution:
Keywords: | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
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Comment (by arma):
Replying to [comment:10 dcf]:
> Since the fix in #33385 on 2020-02-20, only about 20–30% of connections
at the bridge have a meaningful `client_ip`. I believe this is causing us
to undercount clients and/or bandwidth, even though we no longer set
`USERADDR` for those 0.0.0.0 connections. In the absence of `USERADDR`,
tor will use a 127.0.0.1 address, which like 0.0.0.0 is ignored for the
purpose of bandwidth accounting.
I agree with your analysis.
I've opened #33747 to handle this situation better on the Tor side. But I
encourage you to continue regarding "we don't send a proper ip address
along" as a bug on the Snowflake side.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33157#comment:11>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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