mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-12-06 19:41:15 +01:00
George Kadianakis
248cbc2d22
tl;dr We were not counting cells flying from the client to the service, but we were counting cells flying from the service to the client. When a rendezvous cell arrives from the client to the RP, the RP forwards it to the service. For this to happen, the cell first passes through command_process_relay_cell() which normally does the statistics counting. However because the `rend_circ` circuit was not flagged with `circuit_carries_hs_traffic_stats` in rend_mid_rendezvous(), the cell is not counted there. Then the cell goes to circuit_receive_relay_cell() which has a special code block based on `rend_splice` specifically for rendezvous cells, and the cell gets directly passed to `rend_circ` via a direct call to circuit_receive_relay_cell(). The cell never passes through command_process_relay_cell() ever again and hence is never counted by our rephist module. The fix here is to flag the `rend_circ` circuit with `circuit_carries_hs_traffic_stats` so that the cell is counted as soon as it hits command_process_relay_cell(). Furthermore we avoid double-counting cells since the special code block of circuit_receive_relay_cell() makes us count rendezvous cells only as they enter the RP and not as they exit it. Fixes #40117.
Tor protects your privacy on the internet by hiding the connection
between your Internet address and the services you use. We believe Tor
is reasonably secure, but please ensure you read the instructions and
configure it properly.
To build Tor from source:
./configure && make && make install
To build Tor from a just-cloned git repository:
sh autogen.sh && ./configure && make && make install
Home page:
https://www.torproject.org/
Download new versions:
https://www.torproject.org/download/download.html
Documentation, including links to installation and setup instructions:
https://www.torproject.org/docs/documentation.html
Making applications work with Tor:
https://wiki.torproject.org/projects/tor/wiki/doc/TorifyHOWTO
Frequently Asked Questions:
https://www.torproject.org/docs/faq.html
To get started working on Tor development:
See the doc/HACKING directory.
Release timeline:
https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTorReleases