[tor-bugs] #25605 [Core Tor/Tor]: Rust protover::compute_for_old_tor() always says the version is newer than 0.2.9.3-alpha
Tor Bug Tracker & Wiki
blackhole at torproject.org
Fri Mar 23 02:29:50 UTC 2018
#25605: Rust protover::compute_for_old_tor() always says the version is newer than
0.2.9.3-alpha
------------------------------+--------------------------------
Reporter: isis | Owner: isis
Type: defect | Status: assigned
Priority: High | Milestone: Tor: 0.3.3.x-final
Component: Core Tor/Tor | Version: Tor: 0.3.3.1-alpha
Severity: Normal | Keywords: 033-must, fast-fix
Actual Points: | Parent ID:
Points: 1 | Reviewer:
Sponsor: Sponsor8-can |
------------------------------+--------------------------------
In https://trac.torproject.org/projects/tor/ticket/25386#comment:21, after
changing/adding some tests, I noticed that
`protover::compute_for_old_tor()` always returns an empty string, meaning
that the version we parsed is new enough that the router should be
reporting its own protocol versions. It's because the Rust code is calling
the C version of `tor_version_as_new_as()`, which expects a ''platform
string'', not a version, so it gets to `tor_version_parse_platform()`,
decides this is a "non-standard tor" and returns true early. So, in the
top of the Rust function `protover::compute_for_old_tor()`, when we call
`tor_version_as_new_as(version, FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS)`
it says true, and we never reach the rest of the function.
The solution is to prepend `"Tor "` to each of the query strings in
`protover::compute_for_old_tor()`.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25605>
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