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* chanmgr padding: Correct docs for padding_parameters*Ian Jackson2022-08-171-2/+5
| | | | | | | | Prompted by https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2827242 These texts were out of date; one of them still mentioned `all_zeroes`.
* Fix typo in commentNick Mathewson2022-08-171-1/+1
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* tor-chanmgr tests: Fix a minimal-versions failure (actually)Ian Jackson2022-08-171-1/+1
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* tor-chanmgr tests: Fix a minimal-versions failureIan Jackson2022-08-171-2/+2
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* channel padding: Correctly always send the timer parametersIan Jackson2022-08-171-5/+5
| | | | Fixes "chanmgr configuration: Avoid sending needless initial update(s)"
* Rename ChannelsParams types to ChannelPaddingInstructions (fmt)Ian Jackson2022-08-171-3/+6
| | | | Run rustfmt; no other changes.
* Rename ChannelsParams types to ChannelPaddingInstructionsIan Jackson2022-08-172-13/+13
| | | | | | | | As per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826167 This makes some lines too long; I will run rustfmt in a separate commit for clarity.
* chanmgr: Fix typoIan Jackson2022-08-171-1/+1
| | | | | Reported here https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826166
* chanmgr parameterize: Correct doc commentIan Jackson2022-08-171-1/+4
| | | | | As per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826164
* chamgr NetParamsExtract: Replace direct nf_ito accessIan Jackson2022-08-171-4/+23
| | | | | It turns out that the TryFrom was infallible, which wasn't obvious with the previous code structure.
* Channel: Make mutable() and engage_padding_activities infallibleIan Jackson2022-08-172-4/+2
| | | | | | | As per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826151 This gets rid of quite some Bug error paths.
* Move ChannelUsage from tor_proto to tor_chanmgrIan Jackson2022-08-172-4/+4
| | | | | | | | | | | Replace Channel::note_usage with Channel::engage_padding_activities, which unconditionally causes the channel to (start to) do netflow padding things. The condition now lives in chanmgr. Addresses https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826094
* tor-chanmgr: Expand docs for map::Inner dormancy fieldIan Jackson2022-08-171-0/+4
| | | | | As per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826093
* chanmgr padding_parameters: Use OptionIan Jackson2022-08-172-40/+41
| | | | | | | | | The network consensus parameters use (0,0) to mean "no padding" (which is not the same as (0,0) means in a PADDING_NEGOTIATE cell). Representing "no padding" this way is actually quite convoluted and un-Rustic. Ensure that we convert (0,0) to None, and do the primary logic in Option.
* chanmgr: padding: Split IEFI into named functionIan Jackson2022-08-171-19/+27
| | | | | | | Roughly as suggested in https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826160 IMO this is less clear, because of the way it splits the logic up.
* chanmgr: NetParamsExtract: extend docs for nf_itoIan Jackson2022-08-171-2/+2
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* chanmgr: Get rid of final Result relating to netdir/netparamsIan Jackson2022-08-172-32/+29
| | | | No functional change. (The error tyep was Void.)
* chanmgr: Use NetDirProvider::params and Arc<dyn..Netparameters>Ian Jackson2022-08-172-65/+57
| | | | | | | | | This gets rid of many Result(). Many parameters are renamed. Test cases of the now-impossible branch are removed. Deleting the match from padding_parameters will come in a moment. I've split off that commit since it has much whitespace noise. for now, change the error type to Void.
* chanmgr: Add a TODO for renaming NetDirExtractIan Jackson2022-08-171-0/+3
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* channel padding: Rename low_ms and high_msIan Jackson2022-08-172-9/+9
| | | | | These have the unit in the type. Putting that in the field name too is otiose.
* channel padding: Test through most of the layersIan Jackson2022-08-172-0/+363
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* channel padding: Send negotiation cellsIan Jackson2022-08-161-5/+50
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* channel padding: Send padding iff requiredIan Jackson2022-08-161-11/+13
| | | | | | | | | | Now all the information is plumbed to the right place, and we can actually decide if we're sending padding. Additionally, we conditionalise sending timing parameters on whether padding is actually enabled, so in dormant mode we do not generate updates (broadcast to all channels) just to reconfigure unused timing parameters.
* chanmgr configuration: Initialise correctlyIan Jackson2022-08-161-2/+7
| | | | | | This arranges that the ChannelsParams we have retain, and which we send to every newly created channel, actually has the right parameters, even if they're not the default.
* chanmgr configuration: Break out parameterizeIan Jackson2022-08-161-8/+40
| | | | | | | We're going to want to call this at startup as well as during reconfigurations. Code motion.
* chanmgr configuration: Hadle lack of a NetDirIan Jackson2022-08-161-8/+10
| | | | | | Now that the code that actually handles the netdir information can cope with its lack, we can change the types of the various netdir parameters and get rid of the foolish Bugs.
* chanmgr padding: Support reduced and disabled padding (prep)Ian Jackson2022-08-161-3/+9
| | | | | | | | | | Now we actually honour the configuration variable. However, when it is set to None, we lack proper handling. This will be done bh turning None into 0,0 and then treating that as disabled. There is a TODO for that. Note that we *still* don't actually do or negotiate padding.
* chanmgr padding: Fix low vs high comparisonIan Jackson2022-08-161-3/+2
| | | | | Whoops. This bug was completely masked by the fact that we don't actually enable padding yet.
* chanmgr: Break out padding_parameters fnIan Jackson2022-08-161-33/+48
| | | | | | | | | | | | | | | | | | Move some logic out of reconfigure_general into what was update_padding_parameters_from_netdir, and rename that function. We're going to want to call this twice, shortly... * Move out the PaddingParametersBuilder * Have it handle missing netdir, though we currently always pass Ok * Have it handle the error cases It still ignores the config for now. No overall functional change. "git show -b" may be a useful way to review the changes in what becomes "padding_parameters".
* chanmgr: Postpone padding parameters computationIan Jackson2022-08-161-12/+12
| | | | | | | | Now that we make an extract from the incoming NetDir, we can move the padding parameters computation to after we take the lock. This will be necessary for it to be able to depend on the config and dormancy, records of which are protected by the chanmgr lock.
* chanmgr: Introduce NetDirExtractIan Jackson2022-08-161-16/+52
| | | | | This will allow the padding parameter computation to have access to the config, which is within the inner lock.
* Introduce ChannelConfigIan Jackson2022-08-161-5/+12
| | | | | This commit is just the necessary plumbing. The config is currently empty. We'll add something to it, for padding control, later.
* Provide ChannelUsage and plumb it all the way downIan Jackson2022-08-161-0/+4
| | | | | | | | | | | | | Channel padding depends on what the channel is being used for. We therefore need to let the channel code know this information. The implementation of the per-channel padding control logic will be in the new note_usage function, which for now is simply a stub. A future commit will introduce a `PaddingControlState` which lives in the channel frontend; consult the doc comment for that type to see why the plumbing through the channel manager terminates in the channel frontend.
* channel reparameterize: Change error typeIan Jackson2022-08-161-2/+1
| | | | This is going to be able to fail in other ways too, sadly.
* dormancy: Plumb through to chanmgr reconfigure_generalIan Jackson2022-08-161-5/+14
| | | | | | | | | | | | | | | The chanmgr remembers the last dormancy state it was told. We invent a chanmgr-specific Dormancy which the arti-client code knows how to convert from the richer top-level dormant status. This avoids having to have everyone know all the variants of the top-level state. To call reconfigure_general, we must also obtain and plumb through a netdir. Right now we must return an internal error if there is in fact no netdir, because reconfigure_general does not yet cope with a missing netdir. Nothing actually *uses* the dormancy yet.
* chanmgr: reconfigure_general: Rename fn and change typesIan Jackson2022-08-161-5/+23
| | | | | | | | | | | | | | | This function is going to become the code for controlling channels, in general. (Including padding control.) Right now it doesn't do most of the things. In this commit: * Change the prototype and the name now. * Pass `()` for the dormancy and config, adding TODOs. * Provide update_netdir method on AbstractChanMgr, and call that, rather than having the ChanMgr go directly into the channel. (That will enable us to test that `update_netdir` method with test cases that don't have a complete ChanMgr.)
* chanmgr: tests: Introduce new_test_channel_mapIan Jackson2022-08-161-6/+11
| | | | This is going to change. Centralise it first.
* clippy: Consolidate many lints in maint/add_warningIan Jackson2022-06-241-0/+3
| | | | | | Found these by disabling the nightly dbg macro special case. Now, we have a mechanism for globally adding suppressions to tests, we can use that instead.
* maint/add_warning: Add two lints via add_warning as a test caseIan Jackson2022-06-241-0/+2
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* maint/add_warning: Add ability maintain test lint blocksIan Jackson2022-06-241-0/+3
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* channel padding: Rename ChannelsParams from ChannelsConfigIan Jackson2022-06-211-27/+27
| | | | | | | As per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/586#note_2814276 Change names and comments and docs everywhere.
* channel padding: Use IntegerMilliseconds in netdirIan Jackson2022-06-211-12/+10
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* channel padding: Use IntegerMilliseconds in padding::ParametersIan Jackson2022-06-211-10/+15
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* channel padding parameters update: Drop a redundant cloneIan Jackson2022-06-211-1/+1
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* Fix typoseta2022-06-211-2/+2
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* channel padding: Test timeout updatesIan Jackson2022-06-211-0/+49
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* tor-chanmgr tests: Add config_update tracking to FakeChannelIan Jackson2022-06-211-1/+7
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* channel padding: Honour NetDir for timeoutsIan Jackson2022-06-211-3/+47
| | | | But padding is still not enabled by default.
* channel padding: Plumb settings from chanmgrIan Jackson2022-06-211-0/+79
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* chanmgr: inner (map): Reorganise to prepare for having more stateIan Jackson2022-06-211-14/+27
| | | | | | The main copy of the (global) configuration for the client's channels is going to have to live here, inside this mutex. So this really needs to become a struct with names fields.
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