fix webauth + autoapprove routes (#2528)

* types/node: add helper funcs for node tags

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* types/node: add DebugString method for node

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy/v2: add String func to AutoApprover interface

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy/v2: simplify, use slices.Contains

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy/v2: debug, use nodes.DebugString

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy/v1: fix potential nil pointer in NodeCanApproveRoute

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy/v1: slices.Contains

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration/tsic: fix diff in login commands

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: fix webauth running with wrong scenario

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: move common oidc opts to func

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: require node count, more verbose

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* auth: remove uneffective route approve

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* .github/workflows: fmt

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration/tsic: add id func

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: remove call that might be nil

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: test autoapprovers against web/authkey x group/tag/user

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: unique network id per scenario

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* Revert "integration: move common oidc opts to func"

This reverts commit 7e9d165d4a.

* remove cmd

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: clean docker images between runs in ci

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: run autoapprove test against differnt policy modes

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration/tsic: append, not overrwrite extra login args

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* .github/workflows: remove polv2

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

---------

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

hscontrol/policy/v2/policy.go

@@ -7,6 +7,8 @@ import (
 	"strings"
 	"sync"
 
+	"slices"
+
 	"github.com/juanfont/headscale/hscontrol/types"
 	"go4.org/netipx"
 	"tailscale.com/net/tsaddr"
@@ -174,10 +176,8 @@ func (pm *PolicyManager) NodeCanHaveTag(node *types.Node, tag string) bool {
 	defer pm.mu.Unlock()
 
 	if ips, ok := pm.tagOwnerMap[Tag(tag)]; ok {
-		for _, nodeAddr := range node.IPs() {
-			if ips.Contains(nodeAddr) {
-				return true
-			}
+		if slices.ContainsFunc(node.IPs(), ips.Contains) {
+			return true
 		}
 	}
 
@@ -196,10 +196,8 @@ func (pm *PolicyManager) NodeCanApproveRoute(node *types.Node, route netip.Prefi
 	// where there is an exact entry, e.g. 10.0.0.0/8, then
 	// check and return quickly
 	if _, ok := pm.autoApproveMap[route]; ok {
-		for _, nodeAddr := range node.IPs() {
-			if pm.autoApproveMap[route].Contains(nodeAddr) {
-				return true
-			}
+		if slices.ContainsFunc(node.IPs(), pm.autoApproveMap[route].Contains) {
+			return true
 		}
 	}
 
@@ -220,10 +218,8 @@ func (pm *PolicyManager) NodeCanApproveRoute(node *types.Node, route netip.Prefi
 		// Check if prefix is larger (so containing) and then overlaps
 		// the route to see if the node can approve a subset of an autoapprover
 		if prefix.Bits() <= route.Bits() && prefix.Overlaps(route) {
-			for _, nodeAddr := range node.IPs() {
-				if approveAddrs.Contains(nodeAddr) {
-					return true
-				}
+			if slices.ContainsFunc(node.IPs(), approveAddrs.Contains) {
+				return true
 			}
 		}
 	}
@@ -279,5 +275,8 @@ func (pm *PolicyManager) DebugString() string {
 		}
 	}
 
+	sb.WriteString("\n\n")
+	sb.WriteString(pm.nodes.DebugString())
+
 	return sb.String()
 }

hscontrol/policy/v2/types.go

@@ -162,6 +162,10 @@ func (g Group) CanBeAutoApprover() bool {
 	return true
 }
 
+func (g Group) String() string {
+	return string(g)
+}
+
 func (g Group) Resolve(p *Policy, users types.Users, nodes types.Nodes) (*netipx.IPSet, error) {
 	var ips netipx.IPSetBuilder
 	var errs []error
@@ -235,6 +239,10 @@ func (t Tag) CanBeAutoApprover() bool {
 	return true
 }
 
+func (t Tag) String() string {
+	return string(t)
+}
+
 // Host is a string that represents a hostname.
 type Host string
 
@@ -590,6 +598,7 @@ func unmarshalPointer[T any](
 type AutoApprover interface {
 	CanBeAutoApprover() bool
 	UnmarshalJSON([]byte) error
+	String() string
 }
 
 type AutoApprovers []AutoApprover