chore(fmt): apply make fmt command

CHANGELOG.md

@@ -3,8 +3,8 @@
 **TBD (TBD):**
 
 **BREAKING**:
-- ACLs have been rewritten and the behavior is different from before. It's now more aligned to tailscale's view of the feature. Namespaces are viewed as users and can communicate with each others. Tags should now work correctly and adding a host to Headscale should now reload the rules. The documentation have a [fictional example](docs/acls.md) that should cover some use cases of the ACLs features.
 
+- ACLs have been rewritten and the behavior is different from before. It's now more aligned to tailscale's view of the feature. Namespaces are viewed as users and can communicate with each others. Tags should now work correctly and adding a host to Headscale should now reload the rules. The documentation have a [fictional example](docs/acls.md) that should cover some use cases of the ACLs features.
 
 **0.13.0 (2022-xx-xx):**
 

acls.go

@@ -129,7 +129,11 @@ func (h *Headscale) generateACLRules() ([]tailcfg.FilterRule, error) {
 	return rules, nil
 }
 
-func (h *Headscale) generateACLPolicySrcIP(machines []Machine, aclPolicy ACLPolicy, u string) ([]string, error) {
+func (h *Headscale) generateACLPolicySrcIP(
+	machines []Machine,
+	aclPolicy ACLPolicy,
+	u string,
+) ([]string, error) {
 	return expandAlias(machines, aclPolicy, u)
 }
 
@@ -184,7 +188,11 @@ func (h *Headscale) generateACLPolicyDestPorts(
 // - a group
 // - a tag
 // and transform these in IPAddresses.
-func expandAlias(machines []Machine, aclPolicy ACLPolicy, alias string) ([]string, error) {
+func expandAlias(
+	machines []Machine,
+	aclPolicy ACLPolicy,
+	alias string,
+) ([]string, error) {
 	ips := []string{}
 	if alias == "*" {
 		return []string{"*"}, nil
@@ -267,7 +275,11 @@ func expandAlias(machines []Machine, aclPolicy ACLPolicy, alias string) ([]strin
 // excludeCorrectlyTaggedNodes will remove from the list of input nodes the ones
 // that are correctly tagged since they should not be listed as being in the namespace
 // we assume in this function that we only have nodes from 1 namespace.
-func excludeCorrectlyTaggedNodes(aclPolicy ACLPolicy, nodes []Machine, namespace string) ([]Machine, error) {
+func excludeCorrectlyTaggedNodes(
+	aclPolicy ACLPolicy,
+	nodes []Machine,
+	namespace string,
+) ([]Machine, error) {
 	out := []Machine{}
 	tags := []string{}
 	for tag, ns := range aclPolicy.TagOwners {
@@ -362,7 +374,11 @@ func expandTagOwners(aclPolicy ACLPolicy, tag string) ([]string, error) {
 	var owners []string
 	ows, ok := aclPolicy.TagOwners[tag]
 	if !ok {
-		return []string{}, fmt.Errorf("%w. %v isn't owned by a TagOwner. Please add one first. https://tailscale.com/kb/1018/acls/#tag-owners", errInvalidTag, tag)
+		return []string{}, fmt.Errorf(
+			"%w. %v isn't owned by a TagOwner. Please add one first. https://tailscale.com/kb/1018/acls/#tag-owners",
+			errInvalidTag,
+			tag,
+		)
 	}
 	for _, owner := range ows {
 		if strings.HasPrefix(owner, "group:") {
@@ -384,11 +400,18 @@ func expandTagOwners(aclPolicy ACLPolicy, tag string) ([]string, error) {
 func expandGroup(aclPolicy ACLPolicy, group string) ([]string, error) {
 	groups, ok := aclPolicy.Groups[group]
 	if !ok {
-		return []string{}, fmt.Errorf("group %v isn't registered. %w", group, errInvalidGroup)
+		return []string{}, fmt.Errorf(
+			"group %v isn't registered. %w",
+			group,
+			errInvalidGroup,
+		)
 	}
 	for _, g := range groups {
 		if strings.HasPrefix(g, "group:") {
-			return []string{}, fmt.Errorf("%w. A group cannot be composed of groups. https://tailscale.com/kb/1018/acls/#groups", errInvalidGroup)
+			return []string{}, fmt.Errorf(
+				"%w. A group cannot be composed of groups. https://tailscale.com/kb/1018/acls/#groups",
+				errInvalidGroup,
+			)
 		}
 	}
 

acls_test.go

@@ -72,7 +72,10 @@ func (s *Suite) TestInvalidAction(c *check.C) {
 func (s *Suite) TestInvalidGroupInGroup(c *check.C) {
 	// this ACL is wrong because the group in users sections doesn't exist
 	app.aclPolicy = &ACLPolicy{
-		Groups: Groups{"group:test": []string{"foo"}, "group:error": []string{"foo", "group:test"}},
+		Groups: Groups{
+			"group:test":  []string{"foo"},
+			"group:error": []string{"foo", "group:test"},
+		},
 		ACLs: []ACL{
 			{Action: "accept", Users: []string{"group:error"}, Ports: []string{"*:*"}},
 		},
@@ -104,7 +107,9 @@ func (s *Suite) TestValidExpandTagOwnersInUsers(c *check.C) {
 
 	_, err = app.GetMachine("foo", "testmachine")
 	c.Assert(err, check.NotNil)
-	hostInfo := []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")
+	hostInfo := []byte(
+		"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+	)
 	machine := Machine{
 		ID:             0,
 		MachineKey:     "foo",
@@ -146,7 +151,9 @@ func (s *Suite) TestValidExpandTagOwnersInPorts(c *check.C) {
 
 	_, err = app.GetMachine("foo", "testmachine")
 	c.Assert(err, check.NotNil)
-	hostInfo := []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")
+	hostInfo := []byte(
+		"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+	)
 	machine := Machine{
 		ID:             1,
 		MachineKey:     "foo",
@@ -188,7 +195,9 @@ func (s *Suite) TestInvalidTagValidNamespace(c *check.C) {
 
 	_, err = app.GetMachine("foo", "testmachine")
 	c.Assert(err, check.NotNil)
-	hostInfo := []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:foo\"]}")
+	hostInfo := []byte(
+		"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:foo\"]}",
+	)
 	machine := Machine{
 		ID:             1,
 		MachineKey:     "foo",
@@ -229,7 +238,9 @@ func (s *Suite) TestValidTagInvalidNamespace(c *check.C) {
 
 	_, err = app.GetMachine("foo", "webserver")
 	c.Assert(err, check.NotNil)
-	hostInfo := []byte("{\"OS\":\"centos\",\"Hostname\":\"webserver\",\"RequestTags\":[\"tag:webapp\"]}")
+	hostInfo := []byte(
+		"{\"OS\":\"centos\",\"Hostname\":\"webserver\",\"RequestTags\":[\"tag:webapp\"]}",
+	)
 	machine := Machine{
 		ID:             1,
 		MachineKey:     "foo",
@@ -265,7 +276,11 @@ func (s *Suite) TestValidTagInvalidNamespace(c *check.C) {
 	app.aclPolicy = &ACLPolicy{
 		TagOwners: TagOwners{"tag:webapp": []string{"foo"}},
 		ACLs: []ACL{
-			{Action: "accept", Users: []string{"foo"}, Ports: []string{"tag:webapp:80,443"}},
+			{
+				Action: "accept",
+				Users:  []string{"foo"},
+				Ports:  []string{"tag:webapp:80,443"},
+			},
 		},
 	}
 	err = app.UpdateACLRules()
@@ -411,7 +426,10 @@ func Test_expandGroup(t *testing.T) {
 			name: "simple test",
 			args: args{
 				aclPolicy: ACLPolicy{
-					Groups: Groups{"group:test": []string{"g1", "foo", "test"}, "group:foo": []string{"foo", "test"}},
+					Groups: Groups{
+						"group:test": []string{"g1", "foo", "test"},
+						"group:foo":  []string{"foo", "test"},
+					},
 				},
 				group: "group:test",
 			},
@@ -422,7 +440,10 @@ func Test_expandGroup(t *testing.T) {
 			name: "InexistantGroup",
 			args: args{
 				aclPolicy: ACLPolicy{
-					Groups: Groups{"group:test": []string{"g1", "foo", "test"}, "group:foo": []string{"foo", "test"}},
+					Groups: Groups{
+						"group:test": []string{"g1", "foo", "test"},
+						"group:foo":  []string{"foo", "test"},
+					},
 				},
 				group: "group:bar",
 			},
@@ -666,7 +687,10 @@ func Test_listMachinesInNamespace(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := listMachinesInNamespace(tt.args.machines, tt.args.namespace); !reflect.DeepEqual(got, tt.want) {
+			if got := listMachinesInNamespace(tt.args.machines, tt.args.namespace); !reflect.DeepEqual(
+				got,
+				tt.want,
+			) {
 				t.Errorf("listMachinesInNamespace() = %v, want %v", got, tt.want)
 			}
 		})
@@ -691,7 +715,11 @@ func Test_expandAlias(t *testing.T) {
 				alias: "*",
 				machines: []Machine{
 					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}},
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.78.84.227")}},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.78.84.227"),
+						},
+					},
 				},
 				aclPolicy: ACLPolicy{},
 			},
@@ -703,10 +731,30 @@ func Test_expandAlias(t *testing.T) {
 			args: args{
 				alias: "group:foo",
 				machines: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.3")}, Namespace: Namespace{Name: "bar"}},
+							netaddr.MustParseIP("100.64.0.1"),
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "test"}},
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.3"),
+						},
+						Namespace: Namespace{Name: "bar"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "test"},
+					},
 				},
 				aclPolicy: ACLPolicy{
 					Groups: Groups{"group:foo": []string{"foo", "bar"}},
@@ -720,10 +768,30 @@ func Test_expandAlias(t *testing.T) {
 			args: args{
 				alias: "group:test",
 				machines: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.3")}, Namespace: Namespace{Name: "bar"}},
+							netaddr.MustParseIP("100.64.0.1"),
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "test"}},
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.3"),
+						},
+						Namespace: Namespace{Name: "bar"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "test"},
+					},
 				},
 				aclPolicy: ACLPolicy{
 					Groups: Groups{"group:foo": []string{"foo", "bar"}},
@@ -748,7 +816,9 @@ func Test_expandAlias(t *testing.T) {
 				alias:    "homeNetwork",
 				machines: []Machine{},
 				aclPolicy: ACLPolicy{
-					Hosts: Hosts{"homeNetwork": netaddr.MustParseIPPrefix("192.168.1.0/24")},
+					Hosts: Hosts{
+						"homeNetwork": netaddr.MustParseIPPrefix("192.168.1.0/24"),
+					},
 				},
 			},
 			want:    []string{"192.168.1.0/24"},
@@ -779,10 +849,36 @@ func Test_expandAlias(t *testing.T) {
 			args: args{
 				alias: "tag:test",
 				machines: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.3")}, Namespace: Namespace{Name: "bar"}},
+							netaddr.MustParseIP("100.64.0.1"),
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "foo"}},
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.3"),
+						},
+						Namespace: Namespace{Name: "bar"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
 				},
 				aclPolicy: ACLPolicy{
 					TagOwners: TagOwners{"tag:test": []string{"foo"}},
@@ -796,10 +892,30 @@ func Test_expandAlias(t *testing.T) {
 			args: args{
 				alias: "tag:foo",
 				machines: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.3")}, Namespace: Namespace{Name: "bar"}},
+							netaddr.MustParseIP("100.64.0.1"),
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "test"}},
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.3"),
+						},
+						Namespace: Namespace{Name: "bar"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "test"},
+					},
 				},
 				aclPolicy: ACLPolicy{
 					Groups:    Groups{"group:foo": []string{"foo", "bar"}},
@@ -814,10 +930,36 @@ func Test_expandAlias(t *testing.T) {
 			args: args{
 				alias: "foo",
 				machines: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.3")}, Namespace: Namespace{Name: "bar"}},
+							netaddr.MustParseIP("100.64.0.1"),
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "foo"}},
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.3"),
+						},
+						Namespace: Namespace{Name: "bar"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
 				},
 				aclPolicy: ACLPolicy{
 					TagOwners: TagOwners{"tag:test": []string{"foo"}},
@@ -829,7 +971,11 @@ func Test_expandAlias(t *testing.T) {
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			got, err := expandAlias(test.args.machines, test.args.aclPolicy, test.args.alias)
+			got, err := expandAlias(
+				test.args.machines,
+				test.args.aclPolicy,
+				test.args.alias,
+			)
 			if (err != nil) != test.wantErr {
 				t.Errorf("expandAlias() error = %v, wantErr %v", err, test.wantErr)
 
@@ -861,14 +1007,38 @@ func Test_excludeCorrectlyTaggedNodes(t *testing.T) {
 					TagOwners: TagOwners{"tag:test": []string{"foo"}},
 				},
 				nodes: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "foo"}},
+							netaddr.MustParseIP("100.64.0.1"),
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
 				},
 				namespace: "foo",
 			},
 			want: []Machine{
-				{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "foo"}},
+				{
+					IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")},
+					Namespace:   Namespace{Name: "foo"},
+				},
 			},
 			wantErr: false,
 		},
@@ -879,25 +1049,69 @@ func Test_excludeCorrectlyTaggedNodes(t *testing.T) {
 					TagOwners: TagOwners{"tag:foo": []string{"foo"}},
 				},
 				nodes: []Machine{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+					{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+						IPAddresses: MachineAddresses{
-					{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "foo"}},
+							netaddr.MustParseIP("100.64.0.1"),
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "foo"},
+						HostInfo: []byte(
+							"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+						),
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "foo"},
+					},
 				},
 				namespace: "foo",
 			},
 			want: []Machine{
-				{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+				{
-				{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")}, Namespace: Namespace{Name: "foo"}, HostInfo: []byte("{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}")},
+					IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.1")},
-				{IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")}, Namespace: Namespace{Name: "foo"}},
+					Namespace:   Namespace{Name: "foo"},
+					HostInfo: []byte(
+						"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+					),
+				},
+				{
+					IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.2")},
+					Namespace:   Namespace{Name: "foo"},
+					HostInfo: []byte(
+						"{\"OS\":\"centos\",\"Hostname\":\"foo\",\"RequestTags\":[\"tag:test\"]}",
+					),
+				},
+				{
+					IPAddresses: MachineAddresses{netaddr.MustParseIP("100.64.0.4")},
+					Namespace:   Namespace{Name: "foo"},
+				},
 			},
 			wantErr: false,
 		},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			got, err := excludeCorrectlyTaggedNodes(test.args.aclPolicy, test.args.nodes, test.args.namespace)
+			got, err := excludeCorrectlyTaggedNodes(
+				test.args.aclPolicy,
+				test.args.nodes,
+				test.args.namespace,
+			)
 			if (err != nil) != test.wantErr {
-				t.Errorf("excludeCorrectlyTaggedNodes() error = %v, wantErr %v", err, test.wantErr)
+				t.Errorf(
+					"excludeCorrectlyTaggedNodes() error = %v, wantErr %v",
+					err,
+					test.wantErr,
+				)
 
 				return
 			}

dns.go

@@ -165,7 +165,11 @@ func getMapResponseDNSConfig(
 			dnsConfig.Domains,
 			fmt.Sprintf(
 				"%s.%s",
-				strings.ReplaceAll(machine.Namespace.Name, "@", "."), // Replace @ with . for valid domain for machine
+				strings.ReplaceAll(
+					machine.Namespace.Name,
+					"@",
+					".",
+				), // Replace @ with . for valid domain for machine
 				baseDomain,
 			),
 		)

docs/acls.md

@@ -1,4 +1,3 @@
-
 # ACLs use case example
 
 Let's build an example use case for a small business (It may be the place where
@@ -52,7 +51,7 @@ Here are the ACL's to implement the same permissions as above:
     "group:boss": ["boss"],
     "group:dev": ["dev1", "dev2"],
     "group:admin": ["admin1"],
-        "group:intern": ["intern1"],
+    "group:intern": ["intern1"]
   },
   // tagOwners in tailscale is an association between a TAG and the people allowed to set this TAG on a server.
   // This is documented [here](https://tailscale.com/kb/1068/acl-tags#defining-a-tag)
@@ -67,51 +66,68 @@ Here are the ACL's to implement the same permissions as above:
 
     // dev can add servers for dev purposes as well as admins
     "tag:dev-databases": ["group:admin", "group:dev"],
-        "tag:dev-app-servers": ["group:admin", "group:dev"],
+    "tag:dev-app-servers": ["group:admin", "group:dev"]
 
     // interns cannot add servers
   },
   "acls": [
     // boss have access to all servers
-        {"action":"accept",
+    {
+      "action": "accept",
       "users": ["group:boss"],
       "ports": [
         "tag:prod-databases:*",
         "tag:prod-app-servers:*",
         "tag:internal:*",
         "tag:dev-databases:*",
-            "tag:dev-app-servers:*",
+        "tag:dev-app-servers:*"
       ]
     },
 
     // admin have only access to administrative ports of the servers
-        {"action":"accept",
+    {
+      "action": "accept",
       "users": ["group:admin"],
       "ports": [
         "tag:prod-databases:22",
         "tag:prod-app-servers:22",
         "tag:internal:22",
         "tag:dev-databases:22",
-            "tag:dev-app-servers:22",
+        "tag:dev-app-servers:22"
       ]
     },
 
     // developers have access to databases servers and application servers on all ports
     // they can only view the applications servers in prod and have no access to databases servers in production
-        {"action":"accept", "users":["group:dev"], "ports":[
+    {
+      "action": "accept",
+      "users": ["group:dev"],
+      "ports": [
         "tag:dev-databases:*",
         "tag:dev-app-servers:*",
-            "tag:prod-app-servers:80,443",
+        "tag:prod-app-servers:80,443"
       ]
     },
 
     // servers should be able to talk to database. Database should not be able to initiate connections to
     // applications servers
-        {"action":"accept", "users":["tag:dev-app-servers"], "ports":["tag:dev-databases:5432"]},
+    {
-        {"action":"accept", "users":["tag:prod-app-servers"], "ports":["tag:prod-databases:5432"]},
+      "action": "accept",
+      "users": ["tag:dev-app-servers"],
+      "ports": ["tag:dev-databases:5432"]
+    },
+    {
+      "action": "accept",
+      "users": ["tag:prod-app-servers"],
+      "ports": ["tag:prod-databases:5432"]
+    },
 
     // interns have access to dev-app-servers only in reading mode
-        {"action":"accept", "users":["group:intern"], "ports":["tag:dev-app-servers:80,443"]},
+    {
+      "action": "accept",
+      "users": ["group:intern"],
+      "ports": ["tag:dev-app-servers:80,443"]
+    },
 
     // We still have to allow internal namespaces communications since nothing guarantees that each user have
     // their own namespaces.
@@ -119,8 +135,7 @@ Here are the ACL's to implement the same permissions as above:
     { "action": "accept", "users": ["dev1"], "ports": ["dev1:*"] },
     { "action": "accept", "users": ["dev2"], "ports": ["dev2:*"] },
     { "action": "accept", "users": ["admin1"], "ports": ["admin1:*"] },
-        {"action":"accept", "users":["intern1"], "ports":["intern1:*"]},
+    { "action": "accept", "users": ["intern1"], "ports": ["intern1:*"] }
   ]
 }
 ```
-

machine.go

@@ -192,7 +192,10 @@ func (h *Headscale) getFilteredByACLPeers(machine *Machine) (Machines, error) {
 	for _, m := range mMachines {
 		authorizedMachines = append(authorizedMachines, m)
 	}
-	sort.Slice(authorizedMachines, func(i, j int) bool { return authorizedMachines[i].ID < authorizedMachines[j].ID })
+	sort.Slice(
+		authorizedMachines,
+		func(i, j int) bool { return authorizedMachines[i].ID < authorizedMachines[j].ID },
+	)
 
 	log.Trace().
 		Caller().
@@ -695,7 +698,11 @@ func (machine Machine) toNode(
 		hostname = fmt.Sprintf(
 			"%s.%s.%s",
 			machine.Name,
-			strings.ReplaceAll(machine.Namespace.Name, "@", "."), // Replace @ with . for valid domain for machine
+			strings.ReplaceAll(
+				machine.Namespace.Name,
+				"@",
+				".",
+			), // Replace @ with . for valid domain for machine
 			baseDomain,
 		)
 	} else {

machine_test.go

@@ -180,7 +180,9 @@ func (s *Suite) TestGetACLFilteredPeers(c *check.C) {
 			MachineKey: "foo" + strconv.Itoa(index),
 			NodeKey:    "bar" + strconv.Itoa(index),
 			DiscoKey:   "faa" + strconv.Itoa(index),
-			IPAddresses:    MachineAddresses{netaddr.MustParseIP(fmt.Sprintf("100.64.0.%v", strconv.Itoa(index+1)))},
+			IPAddresses: MachineAddresses{
+				netaddr.MustParseIP(fmt.Sprintf("100.64.0.%v", strconv.Itoa(index+1))),
+			},
 			Name:           "testmachine" + strconv.Itoa(index),
 			NamespaceID:    stor[index%2].namespace.ID,
 			Registered:     true,

poll.go

@@ -97,7 +97,11 @@ func (h *Headscale) PollNetMapHandler(ctx *gin.Context) {
 	// update ACLRules with peer informations (to update server tags if necessary)
 	err = h.UpdateACLRules()
 	if err != nil {
-		log.Error().Caller().Str("func", "handleAuthKey").Str("machine", machine.Name).Err(err)
+		log.Error().
+			Caller().
+			Str("func", "handleAuthKey").
+			Str("machine", machine.Name).
+			Err(err)
 	}
 
 	// From Tailscale client: