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* DirMgr:: Remove Error::NoChange as redundant.Nick Mathewson2022-05-251-38/+16
| | | | | | | | Now that the relevant functions now report changed/not-changed status via a boolean out-parameter (see !527), there's no reason to have a separate NoChanged error case. Closes #484.
* Merge branch 'bug482' into 'main'eta2022-05-241-20/+105
|\ | | | | | | | | | | | | DirMgr: Stop load-from-cache process when there is no change. Closes #482 See merge request tpo/core/arti!527
| * DirMgr: Stop load-from-cache process when there is no change.Nick Mathewson2022-05-241-20/+105
| | | | | | | | | | | | | | | | | | | | | | | | Previously in !511 I had introduced a bug where, if there was an error more serious than "no change", that error would keep us from noticing that we had no change, and we'd loop until the safety counter ran out. Then we'd panic. This commit fixes the bug by reintroducing the `changed` boolean -- this time as an outparam for the add_from_* methods. Fixes #482.
* | fs-mistrust: make Mistrust have a corresponding Builder type.Nick Mathewson2022-05-241-1/+1
|/ | | | | This is an approximately minimal revision to get Builder in place; subsequent commits will clean up the API.
* Fix compilation with Rust 1.56.Nick Mathewson2022-05-171-3/+2
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* DirMgr: Remove blocking_error return path.Nick Mathewson2022-05-171-26/+22
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* DirMgr: Unify error return pathsNick Mathewson2022-05-171-84/+133
| | | | | | | | | | | | | | | | | We no longer have separate return paths for recoverable and fatal errors; instead, they are merged, and distinguished based on recovery actions. Since it is now possible for download() to give an error that should _not_ destroy the previous state, it takes `&mut Box<dyn DirState>`. This change unfortunately means that we can no longer call `state = state.advance()`, but instead have to do some mem::swap junk with poisoned values. Any better solution would be a good thing. Additionally, the reset() and advance() methods can no longer fail. There is still a separate return path for reset-triggering errors; I'm about to fix that.
* DirMgr: Remove special handling of "changed" booleanNick Mathewson2022-05-171-53/+43
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* DirMgr: Start refactoring error handling.Nick Mathewson2022-05-171-1/+4
| | | | | | This commit adds a couple of new error types that we will soon want to distinguish, and a new way of classifying errors. These are not yet all used.
* Give an error if the cache violates If-Modified-Since.Nick Mathewson2022-05-161-7/+24
| | | | | This should be sufficient to detect several kinds of nefariousness that we'd previously overlooked.
* Add missing extend_tolerance to add_consensus_text.Nick Mathewson2022-05-161-0/+1
| | | | This should have gone in when we fixed #412
* Move consensus signature verification to add-document code.Nick Mathewson2022-05-161-22/+95
| | | | | | | | | | | Previously, we did this in `advance()`, but that wasn't so great: it meant that we could fail in the advance() code, whereas the calls to `advance()` treated errors as fatal. This treats failed verification as a blocking error that requires a reset. Fixes one aspect of #439.
* DirMgr: Add a way for a state to report a blocking error.Nick Mathewson2022-05-161-0/+5
| | | | | (A blocking error is one that means that the current bootstrap attempt has failed, and must be restarted.)
* Implement nonfatal errors in add_from_*Nick Mathewson2022-05-161-52/+91
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* DirMgr: Let add_from_* distinguish non-fatal errorsNick Mathewson2022-05-161-30/+47
| | | | | | | Previously all errors were treated as non-fatal. The add_from_* implementations don't yet behave properly; I'll fix them in subsequent commits.
* DirMgr: make DocSource useful by having it include dirserver info.Nick Mathewson2022-05-161-17/+35
| | | | | | | | | Previously DocSource would tell you whether the document was from a local store or a cache server, but it wouldn't tell you _which_ server it came from. This change required adding DocSource as an argument to DirState::add_from_download.
* tor-dirmgr: update status reporting to consider skew toleranceNick Mathewson2022-05-111-0/+6
| | | | | | In our status reporting code, we consider an expired-but-still-usable directory still bootstrapped, but not 100% bootstrapped.
* Make reset_time() for incomplete directories more generous.Nick Mathewson2022-05-111-10/+35
| | | | | | | | | | | Since we want to be willing to use older consensuses, we don't necessarily want to reset a download just because the consensus is expired. This new behavior isn't ideal either; I've added a TODO that relates to #433. Related of #412
* Add DirSkewTolerance section to DirMgr configuration.Nick Mathewson2022-05-111-0/+2
| | | | | | | | | | | | | | | | | | | | This new section describes how much variance we accept when it comes to expired and not-yet-valid directory documents. (Currently, the only ones where this matters for are consensus documents and authority certificates.) A document that is invalid by no more than these tolerances is not _live_, but it can still be used. These tolerances serve two purposes: * First, they allow clients to run with a little more clock skew than they would tolerate otherwise. * Second, they allow clients to survive the situation where the authorities are unable to reach a consensus for a day or two. Compare with Tor's REASONABLY_LIVE_TIME and NETWORKSTATUS_ALLOW_SKEW constants; also compare with proposal 212. Closes #412.
* tor-dirmgr: small fixups for the bootstrapping refactoreta2022-05-101-11/+6
| | | | | | | - Some FIXMEs got removed or amended. - AddMicrodescs now yields a mutable reference, so we can use .drain() and reuse the allocation. - Some panics were downgraded to debug_asserts.
* tor-dirmgr/state.rs: take an object to get a netdir, not a netdireta2022-05-101-9/+24
| | | | | | | | | - Taking a previous netdir directly and keeping it around before we need it is a bit of a waste of memory, and also doesn't mesh well with how SharedMutArc works. - To remedy this, introduce a new trait `PreviousNetDir` and have the state machines take that instead. (I was a bit tempted to just pass in the SharedMutArc directly. Maybe I should've done that.)
* tor-dirmgr/state.rs: remove GetConsensusState::bodge_neweta2022-05-101-37/+12
| | | | - (Also fixes up some dirfilter stuff, whoops.)
* tor-dirmgr/state.rs: remove WriteNetDir, use filters directlyeta2022-05-101-97/+79
| | | | | - The only purpose of WriteNetDir was to provide a filter, which isn't necessary any more. Refactor to provide the filter directly.
* tor-dirmgr/state.rs: use the NetDirChange API instead of WriteNetDireta2022-05-101-243/+164
| | | | | | | | | | | - GetMicrodescsState now uses the NetDirChange API to propagate netdir changes, instead of modifying the netdir directly. - PendingNetDir was refactored in order to support this use case. - As a result, the netdir-related methods in WriteNetDir can be removed, leaving only the DirFilter for now. - add_from_cache() no longer takes a store, because nothing uses it. - (bodge: apply_netdir_changes() was put in a few places missed previously)
* tor-dirmgr/state.rs: add new NetDirChange API, consume iteta2022-05-101-0/+25
| | | | | | | | | | | | | - The new DirState::get_netdir_change() API lets the state machine export a NetDirChange: a request to either replace the current netdir, or add microdescs to it. - bootstrap.rs now consumes this new API, even though nothing implements it yet. - This will let us implement GetMicrodescsState without having to directly mutate the netdir. The calling code also handles checking the netdir against the circmgr for sufficiency, and updating the consensus metadata in the store, meaning the revised GetMicrodescsState will not have to perform these tasks.
* tor-dirmgr/state.rs: feed through additional parameters, use themeta2022-05-101-236/+217
| | | | | | | | | | | | | | - The additional parameters passed to GetConsensusState are now passed through all the states, and used as well. - WriteNetDir doesn't have a now() or config() method any more, since the states now get this from the runtime or the config parameters. - This required modifying the tests to make a mocked runtime and custom config directly, instead of using DirRcv for this purpose. - Additionally, because we don't have to upgrade a weak reference for DirState::dl_config(), that function no longer wraps its return value in Result. - (A bunch of the FIXMEs from the previous commit that introduced the additional parameters have now been rectified as a result.)
* tor-dirmgr/state.rs: refactor GetConsensusState::neweta2022-05-101-217/+281
| | | | | | | | | | | | | - GetConsensusState::new now takes a set of parameters matching what it actually needs, instead of just taking a writedir. (It still *does* take a writedir, and indeed still uses it for basically everything, but that will eventually go away.) - Its call sites were updated. - Some tests now need to take a runtime, and got indented a lot as a result. - Resetting was made non-functional, because we need to thread through the parameters passed to GetConsensusState to all of the other states, too. This will happen in a later commit.
* tor-dirmgr: move DirState to state.rseta2022-05-101-2/+77
| | | | | | - Given that this is effectively an implementation detail, it doesn't really make sense to have it be in the crate root... - (also, we're going to change it a bunch now)
* Update tor-dirmgr to use fs-mistrust.Nick Mathewson2022-05-091-1/+6
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* Change builder list APIIan Jackson2022-05-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | The new API is (roughly) as discussed in https://gitlab.torproject.org/tpo/core/arti/-/issues/451 This is quite a large commit and it is not convenient to split it up. It contains the following changes: * Redo the list builder and accessor macros implemnetation, including docs and tests. * Change uses of define_list_config_builder. In each case: - Move the docs about the default value to the containing field. - Remove the other docs (which were just recapitulations, and are now not needed since the ListBuilder is no longer public). - Rewmove or replace `pub` in the define_list_builder_helper call, so that the builder is no longer public. - Change the main macro call site to use define_list_builder_helper. - Add a call to define_list_builder_accessors. * Make the module `list_builder` pub so that we have somewhere to put the overview documentation. * Consequential changes: - Change `outer.inner().replace(X)` to `outer.set_inner(X)` - Consequential changes to imports (`use` statements).
* Merge branch 'download-schedule' into 'main'Nick Mathewson2022-04-261-9/+9
|\ | | | | | | | | DownloadSchedule: Introduce Builder See merge request tpo/core/arti!473
| * DirMgrConfig: Remove unnecessary accessorsIan Jackson2022-04-261-5/+5
| | | | | | | | | | | | | | These fields are pub. Retain two convenience accessor functions that access sub-fields of network.
| * DirMgrConfig: Rename two fields that contained a _configIan Jackson2022-04-261-1/+1
| | | | | | | | This entire struct is config. This is otiose.
| * DownloadSchedule: Abolish accessors in DownloadScheduleConfigIan Jackson2022-04-261-6/+6
| | | | | | | | We can just make the fields pub(crate).
* | Merge branch 'main' into 'msrv_1_56'Nick Mathewson2022-04-261-11/+7
|\| | | | | | | | | | | # Conflicts: # crates/tor-config/Cargo.toml # crates/tor-dirmgr/src/state.rs # doc/semver_status.md
| * Rename ThingListBuilder::replace (from set)Ian Jackson2022-04-251-2/+2
| | | | | | | | | | As per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/471#note_2798024
| * Introduce AuthorityListBuilder in NetworkConfigBuilderIan Jackson2022-04-251-10/+6
| | | | | | | | | | | | | | | | | | NetworkConfigBuilder needs to not contain any validated structs, so that its serde does not expose the validated details. AuthorityListBuilder is what ought to go here - and it contains Vec<AuthorityBuilder>, not Vec<Authority>. As a consequence, many places now deal with AuthorityBuilder, rather than Authority.
* | squash! Bump every crate's edition to 2021.Nick Mathewson2022-04-251-1/+0
|/ | | | | Remove all `use` statements for `TryFrom` and `TryInto`. These are now redundant in Rust 2021.
* fallback list: Introduce and use FallbackListBuilderIan Jackson2022-04-221-1/+1
| | | | | | | | | Now the network fallbacks configuration wants to Deserialize a Vec<FallbackDirBuilder>, rather than validated Vec<FallbackDir>. Methods on FallbackListBuilder are as per https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/462#note_2797697 mutatis mutandi for the fact that this struct has only fallbacks in it.
* Treat expired/not-yet-valid directory objects as Errors.Nick Mathewson2022-04-051-16/+9
| | | | | | | | | | | | | Doing this will make us treat caches that send us these objects as not-working, and close circuits to them instead of trying over and over. The case where we add a document from the cache requires special handling: it isn't actually a error to find an expired document in our cache (unless the passage of time itself is erroneous, which is a debatable proposition at best). Fixes #431.
* Merge branch 'no-system-time' into 'main'eta2022-03-301-1/+1
|\ | | | | | | | | | | | | Don't use SystemTime::now() Closes #306 See merge request tpo/core/arti!365
| * remove most usage of SystemTime::nowtrinity-1686a2022-02-251-1/+1
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* | Abolish filter::DynFilter in favour of transparent DirFilterIan Jackson2022-03-251-7/+5
| | | | | | | | | | | | | | | | | | | | | | | | There are two reasons why the DynFilter newtype might be needed: 1. To impl Default. But we don't need it to impl Default since we can have an accessor which does the defaulting. 2. To hide the API. But this is usrely an unstable API. Just writing Arc<dyn> gets rid of a lot of unnecessary boilerplate and conversion code.
* | dirmgr: Initial DirFilter code.Nick Mathewson2022-03-241-0/+29
| | | | | | | | | | | | This code sits behind a feature flag, and can be used to modify directories before storing them. This is part of the implementation for #397.
* | dirmgr: Authority: Abolish v3ident accessorIan Jackson2022-03-181-1/+1
| | | | | | | | | | This makes this information crate-private. The crate can reasonably just access it.
* | Merge branch 'md_allocation' into 'main'Nick Mathewson2022-03-171-20/+54
|\ \ | | | | | | | | | | | | | | | | | | Use less space in hashtables for microdescriptors Closes #386 See merge request tpo/core/arti!415
| * | Run rustfmtIan Jackson2022-03-171-5/+6
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| * | GetMicrodescsState: Abolish separate n_missing field inIan Jackson2022-03-171-12/+12
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| * | GetMicrodescsState: Break out with_mdreceiver_for_missingIan Jackson2022-03-171-13/+23
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| * | GetMicrodescsState: Dedupe slightlyIan Jackson2022-03-171-8/+9
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