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102 lines
3.9 KiB
Plaintext
102 lines
3.9 KiB
Plaintext
Filename: 173-getinfo-option-expansion.txt
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Title: GETINFO Option Expansion
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Author: Damian Johnson
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Created: 02-June-2010
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Status: Accepted
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Overview:
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Over the course of developing arm there's been numerous hacks and
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workarounds to gleam pieces of basic, desirable information about the tor
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process. As per Roger's request I've compiled a list of these pain points
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to try and improve the control protocol interface.
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Motivation:
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The purpose of this proposal is to expose additional process and relay
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related information that is currently unavailable in a convenient,
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dependable, and/or platform independent way. Examples of this are...
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- The relay's total contributed bandwidth. This is a highly requested
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piece of information and, based on the following patch from pipe, looks
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trivial to include.
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http://www.mail-archive.com/or-talk@freehaven.net/msg13085.html
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- The process ID of the tor process. There is a high degree of guess work
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in obtaining this. Arm for instance uses pidof, netstat, and ps yet
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still fails on some platforms, and Orbot recently got a ticket about
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its own attempt to fetch it with ps:
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https://trac.torproject.org/projects/tor/ticket/1388
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This just includes the pieces of missing information I've noticed
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(suggestions or questions of their usefulness are welcome!).
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Security Implications:
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None that I'm aware of. From a security standpoint this seems decently
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innocuous.
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Specification:
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The following addition would be made to the control-spec's GETINFO section:
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"relay/bw-limit" -- Effective relayed bandwidth limit.
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"relay/burst-limit" -- Effective relayed burst limit.
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"relay/read-total" -- Total bytes relayed (download).
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"relay/write-total" -- Total bytes relayed (upload).
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"relay/flags" -- Space separated listing of flags currently held by the
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relay as repored by the currently cached consensus.
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"process/user" -- Username under which the tor process is running,
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providing an empty string if none exists.
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"process/pid" -- Process id belonging to the main tor process, -1 if none
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exists for the platform.
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"process/uptime" -- Total uptime of the tor process (in seconds).
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"process/uptime-reset" -- Time since last reset (startup, sighup, or RELOAD
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signal, in seconds).
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"process/descriptors-used" -- Count of file descriptors used.
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"process/descriptor-limit" -- File descriptor limit (getrlimit results).
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"ns/authority" -- Router status info (v2 directory style) for all
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recognized directory authorities, joined by newlines.
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"state/names" -- A space-separated list of all the keys supported by this
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version of Tor's state.
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"state/val/<key>" -- Provides the current state value belonging to the
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given key. If undefined, this provides the key's default value.
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"status/ports-seen" -- A summary of which ports we've seen connections
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circuits connect to recently, formatted the same as the EXITS_SEEN status
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event described in Section 4.1.XX. This GETINFO option is currently
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available only for exit relays.
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4.1.XX. Per-port exit stats
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The syntax is:
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"650" SP "EXITS_SEEN" SP TimeStarted SP PortSummary CRLF
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We just generated a new summary of which ports we've seen exiting circuits
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connecting to recently. The controller could display this for the user, e.g.
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in their "relay" configuration window, to give them a sense of how they're
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being used (popularity of the various ports they exit to). Currently only
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exit relays will receive this event.
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TimeStarted is a quoted string indicating when the reported summary
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counts from (in GMT).
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The PortSummary keyword has as its argument a comma-separated, possibly
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empty set of "port=count" pairs. For example (without linebreak),
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650-EXITS_SEEN TimeStarted="2008-12-25 23:50:43"
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PortSummary=80=16,443=8
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