Reject configurations where two configured TCP listeners would bind
the same kernel socket. Covers every pair of listen_addr,
grpc_listen_addr, metrics_listen_addr, and tls_letsencrypt_listen
(when HTTP-01 ACME is in use). Each violation renders as a structured
ConfigError naming both YAML keys, the values the operator wrote, and
a hint pointing at the canonical setup.
Closes the symptom in #3227: the misconfiguration is now rejected at
config-load time with a self-explaining error, instead of failing at
runtime with a misleading "address already in use" log because the
ACME challenge listener and the main HTTP listener competed for the
same port inside the same process.
Fixes#3227
portFromAddr resolves numeric and named ports (":http", ":https")
without touching /etc/services or the resolver. listenersOverlap
follows kernel rules: same port plus a wildcard host on either side,
or same port plus identical specific host, both count as collision;
different specific hosts on the same port do not. Set an explicit
viper default for tls_letsencrypt_listen so a minimal config still
resolves to ":http".
Updates #3227
Foundation for restructuring config validation feedback. Typed error
with errors.Is/As/Join hooks, structured fields rendered as a
multi-line operator-facing block (current, conflicts with, allowed,
minimum, maximum, why, hint, see), and a configValidator that joins
violations via errors.Join. ConfigErrors walks the tree to collect
every *ConfigError, and Cause keeps existing sentinel identities
reachable through errors.Is.
Updates #3227
The filter lived in ACL.UnmarshalJSON, so grants, ssh and nodeAttrs still
hit RejectUnknownMembers. Strip the members in the HuJSON AST instead, at
the single decode entrypoint. Grant "app" payloads are left untouched.
Fixes#3479
Online now requires a live session and an unexpired key, derived in one
place by Node.ShouldBeOnline so every writer agrees what online means.
Fixes#3470
acmeLogger drained and closed the body of every ACME error response before
handing the response back to golang.org/x/crypto/acme. The client parses that
body to classify errors, so badNonce was no longer recognised: isBadNonce
returned false, clearNonces was never called and Client.post treated the 400 as
non-retriable.
One badNonce reply therefore stops certificate renewal for good. autocert
retries every 30-60 minutes, each attempt reuses a nonce stored from the
previous failed response, that nonce has already expired, and the loop repeats
until the process is restarted or the certificate expires.
Restore the body with a fresh reader after logging it.
This is relevant when docker is used as container runtime as it does not
set /tmp as tmpfs. With podman /tmp is mounted as tmpfs due to
`--read-only-tmpfs` (enabled by default).
Fixes: #3463
The interstitial was the body of /oidc/callback, the URL carrying the
single-use code, so any reload re-entered the spent exchange. Redirect to
GET /register/confirm/{auth_id}, also missing from the route table.
Covers every change shape under four policy shapes, plus connect churn. The
zero-matcher shape is the gap: buildTailPeers skips ReduceNodes there, so the
peer lookup is the only self filter left.
ListPeers with explicit IDs filtered every node, not every peer, so a change
batch naming the recipient returned it as its own peer. db.ListPeers keeps
this out with `id <> nodeID`; the NodeStore rewrite dropped it.
A deleted node is served a self node with no StableID, so Status().Self.ID
goes empty; TestACLPolicyPropagationOverTime must match on hostname instead.
Updates #3410
A bare 404 is indistinguishable from any other map-path error to a Tailscale
client: it retries forever, still logged in. Only a self node with a past
KeyExpiry reaches NeedsLogin. Also skip the reconnect grace wait, which a
deleted node can never satisfy.
Fixes#3410
It fills PeersRemoved without deleting anything. The batcher now tears down
the session behind every removed id, so a caller would kill a live poll.
Updates #3410
Dropping the batcher entry left serveLongPoll streaming to a node that no
longer exists: Close ranges b.nodes and can no longer reach it, so shutdown
blocks and the client keeps polling instead of re-authenticating.
Updates #3410
DNS names are case-insensitive, but clients match extra records against
the lowercased query name, so records with mixed-case names (for example
"Printer.fritz.box" in an extra_records_path file) never resolved and
queries fell through to the global nameserver.
Normalize record names to lowercase where the records enter the tailcfg
DNS config, covering both dns.extra_records and extra_records_path.
Fixes#2782
Kristoffer Dalby
Kristoffer Dalby
Andrei Korviakov
Florian Preinstorfer
Sean Reifschneider
Saleh