tailcfg,types/netmap: visible services in netmapadrianosela/visible-services

ipn/localapi: serve service list over localapi

cmd/tailscale: new service list command

Updates <FIXME(@adrianosela)>

1 files changed, 21 insertions, 0 deletions

diff --git a/types/netmap/netmap.go b/types/netmap/netmap.go
index ac95254da..90ed9b3fc 100644
--- a/types/netmap/netmap.go
+++ b/types/netmap/netmap.go
@@ -146,6 +146,27 @@ func (nm *NetworkMap) GetIPVIPServiceMap() IPServiceMappings {
 	return res
 }
 
+// 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.
+func (nm *NetworkMap) Services() map[tailcfg.ServiceName]tailcfg.ServiceDetails {
+	if nm == nil || !nm.SelfNode.Valid() {
+		return nil
+	}
+	result := make(map[tailcfg.ServiceName]tailcfg.ServiceDetails)
+	for cap := range nm.SelfNode.CapMap().All() {
+		if !strings.HasPrefix(string(cap), string(tailcfg.NodeAttrPrefixServices)) {
+			continue
+		}
+		svcs, err := tailcfg.UnmarshalNodeCapViewJSON[tailcfg.ServiceDetails](nm.SelfNode.CapMap(), cap)
+		if err != nil || len(svcs) < 1 {
+			continue
+		}
+		result[svcs[0].Name] = svcs[0]
+	}
+	return result
+}
+
 // SelfNodeOrZero returns the self node, or a zero value if nm is nil.
 func (nm *NetworkMap) SelfNodeOrZero() tailcfg.NodeView {
 	if nm == nil {