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types/netmap,tailcfg: update documentation for Services cap

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Updates tailscale/corp#40052

Signed-off-by: Adriano Sela Aviles <adriano@tailscale.com>
This commit is contained in:
Adriano Sela Aviles 2026-04-13 08:59:28 -07:00 committed by Adriano Sela Aviles
parent e2fa9ff140
commit 4ce1643929
2 changed files with 8 additions and 4 deletions
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6
tailcfg/tailcfg.go
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@ -2794,9 +2794,11 @@ const (
const (
// NodeAttrPrefixServices is the prefix for per-service [NodeCapMap]
// entries describing Services visible (accessible) to this node. The full
// key for a service named "svc:foo" is NodeAttrPrefixServices+"foo".
// entries describing Services visible (accessible) to this node.
// Each value under such a key is of type [ServiceDetails].
// The suffix after the prefix is an opaque server-chosen identifier;
// consumers must use [ServiceDetails.Name] as the canonical service name
// rather than parsing it from the map key.
NodeAttrPrefixServices NodeCapabilityPrefix = "services/"
)

6
types/netmap/netmap.go
View File

@ -147,8 +147,10 @@ func (nm *NetworkMap) GetIPVIPServiceMap() IPServiceMappings {
}
// Services returns the Services visible (accessible) to this node,
// decoded from [tailcfg.NodeAttrPrefixServices]+serviceName entries in the
// self node's CapMap. Returns nil if nm is nil or SelfNode is invalid.
// decoded from [tailcfg.NodeAttrPrefixServices] entries in the self node's
// CapMap. The returned map is keyed by [tailcfg.ServiceDetails.Name], which is
// the canonical service name; the NodeCapMap key suffix is opaque and must not
// be parsed or relied upon. It returns nil if nm is nil or SelfNode is invalid.
//
// TODO(adrianosela): cache the result of decoding the capmap so
// we don't have to decode it multiple times after each netmap update.