TUN-7124: Add intercept ingress rule for management requests

ingress/ingress.go

@@ -35,13 +35,22 @@ const (
 
 // FindMatchingRule returns the index of the Ingress Rule which matches the given
 // hostname and path. This function assumes the last rule matches everything,
-// which is the case if the rules were instantiated via the ingress#Validate method
+// which is the case if the rules were instantiated via the ingress#Validate method.
+//
+// Negative index rule signifies local cloudflared rules (not-user defined).
 func (ing Ingress) FindMatchingRule(hostname, path string) (*Rule, int) {
 	// The hostname might contain port. We only want to compare the host part with the rule
 	host, _, err := net.SplitHostPort(hostname)
 	if err == nil {
 		hostname = host
 	}
+	for i, rule := range ing.LocalRules {
+		if rule.Matches(hostname, path) {
+			// Local rule matches return a negative rule index to distiguish local rules from user-defined rules in logs
+			// Full range would be [-1 .. )
+			return &rule, -1 - i
+		}
+	}
 	for i, rule := range ing.Rules {
 		if rule.Matches(hostname, path) {
 			return &rule, i
@@ -67,6 +76,9 @@ func matchHost(ruleHost, reqHost string) bool {
 
 // Ingress maps eyeball requests to origins.
 type Ingress struct {
+	// Set of ingress rules that are not added to remote config, e.g. management
+	LocalRules []Rule
+	// Rules that are provided by the user from remote or local configuration
 	Rules    []Rule              `json:"ingress"`
 	Defaults OriginRequestConfig `json:"originRequest"`
 }
@@ -145,24 +157,6 @@ func newDefaultOrigin(c *cli.Context, log *zerolog.Logger) Ingress {
 	return ingress
 }
 
-// WarpRoutingService starts a tcp stream between the origin and requests from
-// warp clients.
-type WarpRoutingService struct {
-	Proxy StreamBasedOriginProxy
-}
-
-func NewWarpRoutingService(config WarpRoutingConfig) *WarpRoutingService {
-	svc := &rawTCPService{
-		name: ServiceWarpRouting,
-		dialer: net.Dialer{
-			Timeout:   config.ConnectTimeout.Duration,
-			KeepAlive: config.TCPKeepAlive.Duration,
-		},
-	}
-
-	return &WarpRoutingService{Proxy: svc}
-}
-
 // Get a single origin service from the CLI/config.
 func parseSingleOriginService(c *cli.Context, allowURLFromArgs bool) (OriginService, error) {
 	if c.IsSet(HelloWorldFlag) {

ingress/origin_proxy.go

@@ -17,6 +17,12 @@ type StreamBasedOriginProxy interface {
 	EstablishConnection(ctx context.Context, dest string) (OriginConnection, error)
 }
 
+// HTTPLocalProxy can be implemented by cloudflared services that want to handle incoming http requests.
+type HTTPLocalProxy interface {
+	// Handler is how cloudflared proxies eyeball requests to the local cloudflared services
+	http.Handler
+}
+
 func (o *unixSocketPath) RoundTrip(req *http.Request) (*http.Response, error) {
 	req.URL.Scheme = o.scheme
 	return o.transport.RoundTrip(req)

ingress/origin_service.go

@@ -17,6 +17,7 @@ import (
 
 	"github.com/cloudflare/cloudflared/hello"
 	"github.com/cloudflare/cloudflared/ipaccess"
+	"github.com/cloudflare/cloudflared/management"
 	"github.com/cloudflare/cloudflared/socks"
 	"github.com/cloudflare/cloudflared/tlsconfig"
 )
@@ -278,6 +279,54 @@ func (o statusCode) MarshalJSON() ([]byte, error) {
 	return json.Marshal(o.String())
 }
 
+// WarpRoutingService starts a tcp stream between the origin and requests from
+// warp clients.
+type WarpRoutingService struct {
+	Proxy StreamBasedOriginProxy
+}
+
+func NewWarpRoutingService(config WarpRoutingConfig) *WarpRoutingService {
+	svc := &rawTCPService{
+		name: ServiceWarpRouting,
+		dialer: net.Dialer{
+			Timeout:   config.ConnectTimeout.Duration,
+			KeepAlive: config.TCPKeepAlive.Duration,
+		},
+	}
+
+	return &WarpRoutingService{Proxy: svc}
+}
+
+// ManagementService starts a local HTTP server to handle incoming management requests.
+type ManagementService struct {
+	HTTPLocalProxy
+}
+
+func newManagementService(managementProxy HTTPLocalProxy) *ManagementService {
+	return &ManagementService{
+		HTTPLocalProxy: managementProxy,
+	}
+}
+
+func (o *ManagementService) start(log *zerolog.Logger, _ <-chan struct{}, cfg OriginRequestConfig) error {
+	return nil
+}
+
+func (o *ManagementService) String() string {
+	return "management"
+}
+
+func (o ManagementService) MarshalJSON() ([]byte, error) {
+	return json.Marshal(o.String())
+}
+
+func NewManagementRule(management *management.ManagementService) Rule {
+	return Rule{
+		Hostname: management.Hostname,
+		Service:  newManagementService(management),
+	}
+}
+
 type NopReadCloser struct{}
 
 // Read always returns EOF to signal end of input