Historically, when DERP regions were switched away from strings to
numeric identifiers in PR #14641, tailcfg.Node.HomeDERP was declared
as an int instead of its own type.
This PR declares a new tailcfg.DERPRegionID type, represented by an
int64, and converts the following fields to use this type:
- netcheck.Report.PreferredDERP
- netcheck.Report.RegionLatency
- netcheck.Report.RegionV4Latency
- netcheck.Report.RegionV6Latency
- tailcfg.DERPHomeParams.RegionScore
- tailcfg.DERPMap.Regions
- tailcfg.DERPNode.RegionID
- tailcfg.DERPRegion.RegionID
- tailcfg.NetInfo.PreferredDERP
- tailcfg.Node.HomeDERP
- tailcfg.PeerChange.DERPRegion
- tailcfg.PingResponse.DERPRegionID
Note that the original field was an int, while the new field is backed
by an int64. This change makes DERPRegionID the same size on both
32-bit and 64-bit architectures.
Fixes: #20165
Change-Id: Ic6f795a6d791dd16f756f246d5a02085443e212f
Signed-off-by: Simon Law <sfllaw@tailscale.com>
Previously, a delta update that drops a peer would not invalidate the digest
cache for that peer after deleting its cache entry. If a subsequent (later)
delta re-adds that peer with the same content, the digest cache would prevent
us from updating the persistent entry. Add a test to exercise this, and fix
the bug.
Updates #20795
Change-Id: I4a9ef03e8787a330d6395629251ee61ca2221fdd
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
Package tailcfg defines the types and constants used by the Tailscale
protocol, but since everything is all in one package, it’s difficult
to sift through the docs: https://pkg.go.dev/tailscale.com/tailcfg
We define and enumerate capabilities as string constants for
tailcfg.NodeCapability and tailcfg.PeerCapability. This PR extracts
them into their own packages:
- tailcfg.CapabilityFileSharing becomes nodecap.FileSharing
- tailcfg.NodeAttrOnlyTCP443 becomes nodecap.OnlyTCP443
- tailcfg.PeerCapabilityTaildrive becomes peercap.Taildrive
We originally intended for CapabilityFoo to grant an entitlement or
permission for Foo, and for NodeAttrBar to configure Bar in the
nodeAttrs section of the policy file. However, there was no technical
enforcement of this convention, so new capabilities have used the
NodeAttr prefix regardless of meaning. Therefore, this PR unifies
tailcfg.CapabilityFoo and tailcfg.NodeAttrBar into a single package as
nodecap.Foo and nodecap.Bar.
Ran `go fix -inline ./...` and committed the changes that replaced
uses of the tailcfg aliases with the authoritative ones.
Updates #20259
Change-Id: Ieb7e7e6c8247c39faf42fdf15c68cdc7c621c730
Signed-off-by: Simon Law <sfllaw@tailscale.com>
Add an UpdatePeers method to the cache. This allows us to support netmap peer deltas,
by allowing just the peers to be updated in an existing cache. As a safety check, reject
an update if there was no base netmap data to apply a change to.
Then, when processing peer mutations in the backend, capture any changes that should
be applied to the cache and update it, if one is enabled.
Updates #12542
Change-Id: I2f8790a8fdc5e85fce6700ba4821a8cb10dddffa
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
Some netmap updates are guaranteed to affect only the "static" parts of the
netmap, and so should not require us to walk through all the peers and user
profiles when updating the cache. To support this, the new UpdateSelfOnly
method updates only the Self node and other tailnet settings that are not
dependent on the peers and profiles.
Use this when updating the cache on DERP home changes.
Updates #12542
Change-Id: Ifed522b29d579fb76e010b4ff738cc4e0a72d27f
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
I omitted a lot of the min/max modernizers because they didn't
result in more clear code.
Some of it's older "for x := range 123".
Also: errors.AsType, any, fmt.Appendf, etc.
Updates #18682
Change-Id: I83a451577f33877f962766a5b65ce86f7696471c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Store packet filter rules in the cache. The match expressions are derived
from the filter rules, so these do not need to be stored explicitly, but ensure
they are properly reconstructed when the cache is read back.
Update the tests to include these fields, and provide representative values.
Updates #12639
Change-Id: I9bdb972a86d2c6387177d393ada1f54805a2448b
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
Found by @cmol. When rewriting the same value into the cache, we were dropping
the unchanged keys, resulting in the cache being pruned incorrectly.
Also update the tests to catch this.
Updates #12639
Change-Id: Iab67e444eb7ddc22ccc680baa2f6a741a00eb325
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
The file-based cache implementation was not reporting the correct error when
attempting to load a missing column key. Make it do so, and update the tests to
cover that case.
Updates #12639
Change-Id: Ie2c45a0a7e528d4125f857859c92df807116a56e
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
This commit is based on part of #17925, reworked as a separate package.
Add a package that can store and load netmap.NetworkMap values in persistent
storage, using a basic columnar representation. This commit includes a default
storage interface based on plain files, but the interface can be implemented
with more structured storage if we want to later.
The tests are set up to require that all the fields of the NetworkMap are
handled, except those explicitly designated as not-cached, and check that a
fully-populated value can round-trip correctly through the cache. Adding or
removing fields, either in the NetworkMap or in the cached representation, will
trigger either build failures (e.g., for type mismatch) or test failures (e.g.,
for representation changes or missing fields). This isn't quite as nice as
automatically updating the representation, which I also prototyped, but is much
simpler to maintain and less code.
This commit does not yet hook up the cache to the backend, that will be a
subsequent change.
Updates #12639
Change-Id: Icb48639e1d61f2aec59904ecd172c73e05ba7bf9
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
Simon Law