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Fix: Record a response for opaque tunnels, and a 502 for a failed dial - #1200
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An opaque CONNECT tunnel recorded one session event, the tunnel-open, and never a response, so its row in abctl had no STATUS or DURATION and a tunnel that worked looked the same as one that was hung. A CONNECT whose upstream dial failed was answered 502 and recorded nothing at all. Each tunnel now records a response row that shares the open's RequestID, so abctl pairs the two with no pairing change: - an opaque tunnel, when it ends: the CONNECT's 200, how long the tunnel stayed open, and new bytesUp/bytesDown fields for what it carried each way. This includes the bridge fall-open re-dial. - a failed dial, at once: an open with the new tunnelReason dial-failed, and a 502 whose error carries the dial error. The same happens on the transparent path, where the 502 is synthetic like its CONNECT method. - a bridged tunnel that served no decrypted request, and one whose forged handshake failed (error kind tls_handshake). Both would otherwise be the only tunnel rows left looking unfinished. A bridged tunnel that did serve requests still records no close, since its open folds into the first of them. The close reuses the session the open was recorded under instead of resolving one again. The open row's own attribution is unchanged. The recorder had to become stateful, so the func-typed tunnelRecorder and noopRecorder are replaced by tunnelLog, which guards both rows as at most once. tunnel() now returns the bytes it copied each way. Two side effects are handled deliberately: - usage.Aggregator ignores tunnel rows. A close carries a tunnel's lifetime, not a request latency (minutes for `kubectl logs -f`), and counting it would change what /v1/usage calls a request. - A fall-open re-dial that fails now closes the hijacked client connection. It used to be left open until the client timed out. Fixes rossoctl#1199 Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com> Signed-off-by: Hai Huang <huang195@gmail.com>
…e durations Follows the proxy change that gives opaque tunnels a close row. - A close row carries the Tunnel marker too, so isTunnelOpen now also requires the request phase. Keyed on the marker alone, a close followed by a request to the same host folded that request into itself, and the close disappeared from the timeline. - BYTES shows the counts a tunnel close carries as "↑4.2k ↓18.2k". It is off by default, the first opt-in column, because only those rows have a figure. It sorts by the total. The settings format already fell back to each column's own default, so a saved config that predates BYTES keeps it off. Comments and tests that assumed every column is on by default are corrected, and enabling BYTES is pinned as persisting. - Durations of a minute or more render as 4m12s, and of an hour or more as 1h02m. A tunnel's DURATION is how long it stayed open, and "252.00s" made the reader do the division. Seconds hand over at 59.995s so rounding never prints "60.00s". Pairing a close to its open needed no change, since both share a RequestID. That is pinned by a test. Refs rossoctl#1199 Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com> Signed-off-by: Hai Huang <huang195@gmail.com>
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughCONNECT and transparent tunnel paths now record close events with status, duration, errors, and byte counts. Session storage associates close events with their open events. The abctl interface displays tunnel data, and usage aggregation skips tunnel rows. ChangesTunnel Close Events
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant Client
participant ForwardProxy
participant SessionStore
participant abctl
Client->>ForwardProxy: Send CONNECT request
ForwardProxy->>SessionStore: Append tunnel-open event
ForwardProxy->>Client: Relay tunnel traffic
ForwardProxy->>SessionStore: Append close event to open event bucket
abctl->>abctl: Pair close row with tunnel open
Suggested reviewers: Merge Risk: ⚪ Minimal · up to The change adds close-time rows for tunnels, records 502 responses for failed dials, and excludes tunnel rows from usage totals. No blocking issue was found in the supplied material, and the author reports passing checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to Tunnel outcomes become more informative without an identified policy bypass or session-ownership regression. The main security consideration is that additional connection details inherit the existing unauthenticated session API’s network-access restrictions. Local and bridge-enabled configurations restrict this API to loopback, but deployed network isolation remains unverified. Retained concerns
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Review comments at @core/cost/usage/usage.go:
- Around line 1040-1042: Update the documentation for Counts.PricedRequests and
PriceableRequests to clarify that tunnel rows, including opens and closes, are
excluded from their counts. Leave the usage-count behavior unchanged.
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CLAUDE.mdcmd/abctl/README.mdcmd/abctl/tui/events_columns.gocmd/abctl/tui/events_columns_test.gocmd/abctl/tui/events_pane.gocmd/abctl/tui/settings.gocmd/abctl/tui/settings_test.gocmd/abctl/tui/tunnel_close_test.gocore/cost/usage/usage.gocore/cost/usage/usage_test.gocore/listener/forwardproxy/server.gocore/listener/forwardproxy/transparent.gocore/listener/forwardproxy/tunnelclose_test.gocore/listener/forwardproxy/tunnelreason_integration_test.gocore/listener/forwardproxy/tunnelreason_test.gocore/pipeline/session.gocore/pipeline/session_test.gocore/sessionapi/summary_test.godocs/laptop-service.md
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Fixes review: a tunnel's close moved ActiveSession and UpdatedAt back to the session it opened in Fixes review: a close after a Rekey or an eviction re-created the old bucket holding one orphan row Fixes review: an h2 request whose handler started after ServeConn returned sat beside a close row Fixes review: "a tunnel with no resp row yet is still open" in CLAUDE.md and the abctl README Fixes review: a failed transparent fall-open re-dial recorded 502 where CONNECT records 200 Fixes review: an opaque open folded into a same-host request, leaving its close unpaired Fixes review: BYTES used the count formatter, so 1.5e9 bytes read as "1.5B" Fixes review: the DURATION sort led with tunnel lifetimes Fixes review: a comment named TestTunnelLog_RecordsEachRowAtMostOnce, which does not exist Fixes review: the Requests and PriceableRequests docs still listed tunnels Fixes review: the close-lands-in-its-session test did not check ActiveSession Fixes review: the hours tier of DURATION truncated minutes Fixes review: the settings file header said unlisted columns are visible Files: - CLAUDE.md - cmd/abctl/README.md - cmd/abctl/tui/app.go - cmd/abctl/tui/events_columns.go - cmd/abctl/tui/events_pane.go - cmd/abctl/tui/tunnel_close_test.go - cmd/abctl/userconfig.go - core/cost/usage/usage.go - core/listener/forwardproxy/server.go - core/listener/forwardproxy/transparent.go - core/listener/forwardproxy/tunnelclose_test.go - core/session/bucket_test.go - core/session/store.go Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com> Signed-off-by: Hai Huang <huang195@gmail.com>
…count Fixes review: "the proxy's own list does not count it either" read as EventCount, which does include the close Files: - cmd/abctl/tui/app.go Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com> Signed-off-by: Hai Huang <huang195@gmail.com>
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Reviewed against issue #1199's requirements and the repo conventions.
What I verified:
AppendTrailingcorrectly lands a tunnel's close in the open's session without refreshingUpdatedAtoractiveID, and its eviction/expiry guards are mutex-held and refuse rather than re-creating the entry — the rekey/adoption and eviction races called out in the review-fix commits are covered by tests.- The stateful
tunnelLogenforces at-most-once recording for both rows, and theadmit()guard handles the h2 handler-after-ServeConn race. - The
/v1/usagetunnel exclusion is deliberate, well-argued in the code comment, and theCountsdoc comments were updated to match (the CodeRabbit finding). - abctl pairing:
isTunnelOpenrestricted to the request phase,stayedOpaque,closedTunnelsmap, and the session-list recency guard inapp.goare consistent with each other, and pinned byTestBuildEventRows_TunnelCloseNeverFolds. - Test coverage is thorough across the proxy, store, usage, and TUI layers.
- DCO signed on all 4 commits; conventional prefixes; CI green across all jobs.
Two suggestions and three nits inline — none blocking. Nice work on the review-fix commits; the byte-count formatter ("1.5B" vs "1.5GB") and the DURATION sort catches in particular.
Assisted-By: Claude Code
| // upstream to client — for the tunnel's close row. It waits for the other copy to | ||
| // finish before returning, which it did not need to while nothing read its count: | ||
| // closing both ends first is what makes that wait short. | ||
| func tunnel(client, upstream net.Conn) (up, down int64) { |
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suggestion: tunnel() now blocks on <-upc waiting for the first copy goroutine before returning. Both conns are closed before that wait, which makes it short for plain TCP — but if either side is ever a wrapper whose Close() doesn't unblock a pending Read, tl.close(...) (and the handler goroutine) hangs and the close row is never recorded. The old code returned as soon as the second copy finished. Consider a select with a timeout, or recording the close with the counts available when the second copy ends. Not blocking — the current callers dial plain TCP.
| // it neither makes the session active nor refreshes its UpdatedAt. It reports false, and | ||
| // records nothing, when b's session has been evicted or has expired: the event would pair | ||
| // with nothing, and re-creating the session to hold it could evict another. | ||
| func (s *Store) AppendTrailing(b *Bucket, event pipeline.SessionEvent) bool { |
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suggestion: AppendTrailing still goes through publishLocked, so the close row reaches every stream subscriber. abctl's app.go got the isTunnelClose guard so closes don't refresh session lists — have you checked the other Stream/subscribe consumers for the same "any event bumps session recency" assumption? This PR only audits abctl.
| // were opaque, so there is no model, token or cost to attribute. Counting it would | ||
| // also quietly change what Requests means for every reader of /v1/usage. A bridged | ||
| // tunnel's decrypted requests are ordinary events and are counted as usual. | ||
| if e.Tunnel { |
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nit: excluding tunnels changes what Requests means on the public /v1/usage endpoint — dashboards calibrated on the old definition will see counts drop. The doc comments cover it and the PR body calls it out; if cortex keeps release notes, this deserves an entry there too.
| // which the proxy records only for a tunnel no decrypted request answered. The reason | ||
| // alone is not enough: the transparent listener records a reachable destination's open | ||
| // with no reason, whether or not the bytes then stay opaque. | ||
| func stayedOpaque(open *pipeline.SessionEvent, closed map[string]bool) bool { |
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nit: stayedOpaque only protects an open when its close row is in the same fetched window. A transparent-listener open (empty reason) whose close falls outside the page still folds into an adjacent same-host request, hiding the close. Edge case, transparent listener is off by default — fine to leave.
| // down. Blank on every other row: only an opaque tunnel's close has counts. They are | ||
| // absent on the wire when zero, so a zero on one side is shown only once the other | ||
| // side proves this row carries counts at all. | ||
| func bytesCell(e pipeline.SessionEvent) string { |
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nit: a close row that genuinely carried 0 bytes both ways renders a blank BYTES cell, indistinguishable from a non-close row. The comment acknowledges it ("absent on the wire when zero"). Cosmetic.
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Fixes #1199.
An opaque CONNECT tunnel recorded one session event, its open, and never a response. Its abctl row therefore had no STATUS or DURATION, so a tunnel that worked looked the same as one that was hung. A CONNECT whose upstream dial failed got a 502 and recorded nothing at all.
What abctl shows now
These are real events from an
authbridge-proxybuilt from this branch, rendered by this branch's abctl with BYTES switched on, shown here with TIME, DIR, METHOD, TOKENS and COST removed for width. The three rows are acurl -pfetch through an opaque tunnel, a CONNECT to a closed port, and a tunnel held open for about 1.5s:Before this change, rows 1 and 3 had only their
reqline, and exchange 2 did not appear at all. While tunnel 3 was open only itsreqrow existed; theresprow appeared when it closed. Row 2's detail pane carries"error": {"kind": "dial_failed", "message": "dial tcp 127.0.0.1:47721: connect: connection refused"}.Proxy (
core)The response row shares the open's
requestId, so abctl pairs the two with no pairing change.bytesUp/bytesDownfieldsdial-failed, then a 502 whoseerroris the dial error (transparent path too, where the 502 is synthetic like its CONNECT method)error.kind: tls_handshaketunnelRecorderandnoopRecorderare replaced bytunnelLog, which records each row at most once.tunnel()now returns the bytes it copied each way./v1/usageignores tunnel rows. Every response the aggregator sees counts as a request with its duration in the latency figures. A close row's duration is how long the tunnel stayed open, minutes forkubectl logs -f, so counting it would drag latency toward tunnel lifetimes and change what "requests" means. The ledger was already limited to priced or inference events, so it is unaffected.TestHandleConnect_FallOpenRedialFailureRecordsTheErrorreproduced that as an i/o timeout before the fix.abctl
tunnelmarker too, soisTunnelOpennow also checks for the request phase. Before, a close followed by a request to the same host folded that request into itself and the close vanished from the timeline.TestBuildEventRows_TunnelCloseNeverFoldsreproduced this.4m12sat a minute and1h02mat an hour, instead of252.00s.Not in this PR
tunnelReason. That listener is off by default, and the issue's "Related" section notes the restructure touches the same code.openfor a tunnel with no response yet. An older proxy never records close rows, so abctl cannot tell "still open" from "this proxy doesn't send closes" without a capability signal.Testing
core:go vet ./...clean, andgo test ./...passes in all 60 packages.forwardproxy,transparentproxy,session,sessionapiandcost/usagealso pass under-race.cmd/abctl:GOWORK=off go vet ./...clean, andGOWORK=off go test ./...passes.TestRunExec_BeforeFirstStartRunsAndSaysWhatIsLostfails only when the shell already hasSSL_CERT_FILEset; it fails the same way onmainand passes with that variable unset.cmd/authbridge-{proxy,envoy,praxis}: vet and build pass.TestSummarizeEvent_ShapeIsGuardednow counts 24 fields, and the byte fields are recorded as timeline data that the summary view must keep.TestTunnelReasonsAreDocumentednow requiresdial-failed, which is added todocs/laptop-service.md.Assisted-By: Claude (Anthropic AI) noreply@anthropic.com
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