package tcp import ( "net" "testing" "time" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" "github.com/traefik/traefik/v3/pkg/tcp" ) func Test_addTCPRoute(t *testing.T) { testCases := []struct { desc string rule string serverName string remoteAddr string protos []string routeErr bool matchErr bool }{ { desc: "no tree", routeErr: true, }, { desc: "Rule with no matcher", rule: "rulewithnotmatcher", routeErr: true, }, { desc: "Empty HostSNI rule", rule: "HostSNI(``)", serverName: "example.org", routeErr: true, }, { desc: "Valid HostSNI rule matching", rule: "HostSNI(`example.org`)", serverName: "example.org", }, { desc: "Valid negative HostSNI rule matching", rule: "!HostSNI(`example.com`)", serverName: "example.org", }, { desc: "Valid HostSNI rule matching with alternative case", rule: "hostsni(`example.org`)", serverName: "example.org", }, { desc: "Valid HostSNI rule matching with alternative case", rule: "HOSTSNI(`example.org`)", serverName: "example.org", }, { desc: "Valid HostSNI rule not matching", rule: "HostSNI(`example.org`)", serverName: "example.com", matchErr: true, }, { desc: "Valid negative HostSNI rule not matching", rule: "!HostSNI(`example.com`)", serverName: "example.com", matchErr: true, }, { desc: "Valid HostSNI and ClientIP rule matching", rule: "HostSNI(`example.org`) && ClientIP(`10.0.0.1`)", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid negative HostSNI and ClientIP rule matching", rule: "!HostSNI(`example.com`) && ClientIP(`10.0.0.1`)", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid HostSNI and negative ClientIP rule matching", rule: "HostSNI(`example.org`) && !ClientIP(`10.0.0.2`)", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid negative HostSNI and negative ClientIP rule matching", rule: "!HostSNI(`example.com`) && !ClientIP(`10.0.0.2`)", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid negative HostSNI or negative ClientIP rule matching", rule: "!(HostSNI(`example.com`) || ClientIP(`10.0.0.2`))", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid negative HostSNI and negative ClientIP rule matching", rule: "!(HostSNI(`example.com`) && ClientIP(`10.0.0.2`))", serverName: "example.org", remoteAddr: "10.0.0.2:80", }, { desc: "Valid negative HostSNI and negative ClientIP rule matching", rule: "!(HostSNI(`example.com`) && ClientIP(`10.0.0.2`))", serverName: "example.com", remoteAddr: "10.0.0.1:80", }, { desc: "Valid negative HostSNI and negative ClientIP rule matching", rule: "!(HostSNI(`example.com`) && ClientIP(`10.0.0.2`))", serverName: "example.com", remoteAddr: "10.0.0.2:80", matchErr: true, }, { desc: "Valid negative HostSNI and negative ClientIP rule matching", rule: "!(HostSNI(`example.com`) && ClientIP(`10.0.0.2`))", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid HostSNI and ClientIP rule not matching", rule: "HostSNI(`example.org`) && ClientIP(`10.0.0.1`)", serverName: "example.com", remoteAddr: "10.0.0.1:80", matchErr: true, }, { desc: "Valid HostSNI and ClientIP rule not matching", rule: "HostSNI(`example.org`) && ClientIP(`10.0.0.1`)", serverName: "example.org", remoteAddr: "10.0.0.2:80", matchErr: true, }, { desc: "Valid HostSNI or ClientIP rule matching", rule: "HostSNI(`example.org`) || ClientIP(`10.0.0.1`)", serverName: "example.org", remoteAddr: "10.0.0.1:80", }, { desc: "Valid HostSNI or ClientIP rule matching", rule: "HostSNI(`example.org`) || ClientIP(`10.0.0.1`)", serverName: "example.com", remoteAddr: "10.0.0.1:80", }, { desc: "Valid HostSNI or ClientIP rule matching", rule: "HostSNI(`example.org`) || ClientIP(`10.0.0.1`)", serverName: "example.org", remoteAddr: "10.0.0.2:80", }, { desc: "Valid HostSNI or ClientIP rule not matching", rule: "HostSNI(`example.org`) || ClientIP(`10.0.0.1`)", serverName: "example.com", remoteAddr: "10.0.0.2:80", matchErr: true, }, { desc: "Valid HostSNI x 3 OR rule matching", rule: "HostSNI(`example.org`) || HostSNI(`example.eu`) || HostSNI(`example.com`)", serverName: "example.org", }, { desc: "Valid HostSNI x 3 OR rule not matching", rule: "HostSNI(`example.org`) || HostSNI(`example.eu`) || HostSNI(`example.com`)", serverName: "baz", matchErr: true, }, { desc: "Valid HostSNI and ClientIP Combined rule matching", rule: "HostSNI(`example.org`) || HostSNI(`example.com`) && ClientIP(`10.0.0.1`)", serverName: "example.org", remoteAddr: "10.0.0.2:80", }, { desc: "Valid HostSNI and ClientIP Combined rule matching", rule: "HostSNI(`example.org`) || HostSNI(`example.com`) && ClientIP(`10.0.0.1`)", serverName: "example.com", remoteAddr: "10.0.0.1:80", }, { desc: "Valid HostSNI and ClientIP Combined rule not matching", rule: "HostSNI(`example.org`) || HostSNI(`example.com`) && ClientIP(`10.0.0.1`)", serverName: "example.com", remoteAddr: "10.0.0.2:80", matchErr: true, }, { desc: "Valid HostSNI and ClientIP Combined rule not matching", rule: "HostSNI(`example.org`) || HostSNI(`example.com`) && ClientIP(`10.0.0.1`)", serverName: "baz", remoteAddr: "10.0.0.1:80", matchErr: true, }, { desc: "Valid HostSNI and ClientIP complex combined rule matching", rule: "(HostSNI(`example.org`) || HostSNI(`example.com`)) && (ClientIP(`10.0.0.1`) || ClientIP(`10.0.0.2`))", serverName: "example.com", remoteAddr: "10.0.0.1:80", }, { desc: "Valid HostSNI and ClientIP complex combined rule not matching", rule: "(HostSNI(`example.org`) || HostSNI(`example.com`)) && (ClientIP(`10.0.0.1`) || ClientIP(`10.0.0.2`))", serverName: "baz", remoteAddr: "10.0.0.1:80", matchErr: true, }, { desc: "Valid HostSNI and ClientIP complex combined rule not matching", rule: "(HostSNI(`example.org`) || HostSNI(`example.com`)) && (ClientIP(`10.0.0.1`) || ClientIP(`10.0.0.2`))", serverName: "example.com", remoteAddr: "10.0.0.3:80", matchErr: true, }, { desc: "Valid HostSNI and ClientIP more complex (but absurd) combined rule matching", rule: "(HostSNI(`example.org`) || (HostSNI(`example.com`) && !HostSNI(`example.org`))) && ((ClientIP(`10.0.0.1`) && !ClientIP(`10.0.0.2`)) || ClientIP(`10.0.0.2`)) ", serverName: "example.com", remoteAddr: "10.0.0.1:80", }, { desc: "Valid complex alternative case ALPN and HostSNI rule", rule: "ALPN(`h2c`) && (!ALPN(`h2`) || HostSNI(`example.eu`))", protos: []string{"h2c", "mqtt"}, serverName: "example.eu", }, { desc: "Valid complex alternative case ALPN and HostSNI rule not matching by SNI", rule: "ALPN(`h2c`) && (!ALPN(`h2`) || HostSNI(`example.eu`))", protos: []string{"h2c", "http/1.1", "h2"}, serverName: "example.com", matchErr: true, }, { desc: "Valid complex alternative case ALPN and HostSNI rule matching by ALPN", rule: "ALPN(`h2c`) && (!ALPN(`h2`) || HostSNI(`example.eu`))", protos: []string{"h2c", "http/1.1"}, serverName: "example.com", }, { desc: "Valid complex alternative case ALPN and HostSNI rule not matching by protos", rule: "ALPN(`h2c`) && (!ALPN(`h2`) || HostSNI(`example.eu`))", protos: []string{"http/1.1", "mqtt"}, serverName: "example.com", matchErr: true, }, { desc: "Matching IPv4", rule: "HostSNI(`127.0.0.1`)", serverName: "127.0.0.1", }, { desc: "Matching IPv6", rule: "HostSNI(`10::10`)", serverName: "10::10", }, } for _, test := range testCases { t.Run(test.desc, func(t *testing.T) { t.Parallel() msg := "BYTES" handler := tcp.HandlerFunc(func(conn tcp.WriteCloser) { _, err := conn.Write([]byte(msg)) require.NoError(t, err) }) router, err := NewMuxer() require.NoError(t, err) err = router.AddRoute(test.rule, "", 0, handler) if test.routeErr { require.Error(t, err) return } require.NoError(t, err) addr := "0.0.0.0:0" if test.remoteAddr != "" { addr = test.remoteAddr } conn := &fakeConn{ call: map[string]int{}, remoteAddr: fakeAddr{addr: addr}, } connData, err := NewConnData(test.serverName, conn, test.protos) require.NoError(t, err) matchingHandler, _ := router.Match(connData) if test.matchErr { require.Nil(t, matchingHandler) return } require.NotNil(t, matchingHandler) matchingHandler.ServeTCP(conn) n, ok := conn.call[msg] assert.Equal(t, 1, n) assert.True(t, ok) }) } } func TestParseHostSNI(t *testing.T) { testCases := []struct { desc string expression string domain []string errorExpected bool }{ { desc: "Unknown rule", expression: "Unknown(`example.com`)", errorExpected: true, }, { desc: "HostSNI rule", expression: "HostSNI(`example.com`)", domain: []string{"example.com"}, }, { desc: "HostSNI rule upper", expression: "HOSTSNI(`example.com`)", domain: []string{"example.com"}, }, { desc: "HostSNI rule lower", expression: "hostsni(`example.com`)", domain: []string{"example.com"}, }, { desc: "HostSNI IPv4", expression: "HostSNI(`127.0.0.1`)", domain: []string{"127.0.0.1"}, }, { desc: "HostSNI IPv6", expression: "HostSNI(`10::10`)", domain: []string{"10::10"}, }, { desc: "No hostSNI rule", expression: "ClientIP(`10.1`)", }, { desc: "HostSNI rule and another rule", expression: "HostSNI(`example.com`) && ClientIP(`10.1`)", domain: []string{"example.com"}, }, { desc: "HostSNI rule to lower and another rule", expression: "HostSNI(`example.com`) && ClientIP(`10.1`)", domain: []string{"example.com"}, }, { desc: "HostSNI rule with no domain", expression: "HostSNI() && ClientIP(`10.1`)", }, } for _, test := range testCases { t.Run(test.desc, func(t *testing.T) { t.Parallel() domains, err := ParseHostSNI(test.expression) if test.errorExpected { require.Errorf(t, err, "unable to parse correctly the domains in the HostSNI rule from %q", test.expression) } else { require.NoError(t, err, "%s: Error while parsing domain.", test.expression) } assert.EqualValues(t, test.domain, domains, "%s: Error parsing domains from expression.", test.expression) }) } } func Test_Priority(t *testing.T) { testCases := []struct { desc string rules map[string]int serverName string expectedRule string }{ { desc: "One matching rule, calculated priority", rules: map[string]int{ "HostSNI(`example.com`)": 0, "HostSNI(`example.org`)": 0, }, expectedRule: "HostSNI(`example.com`)", serverName: "example.com", }, { desc: "One matching rule, custom priority", rules: map[string]int{ "HostSNI(`example.org`)": 0, "HostSNI(`example.com`)": 10000, }, expectedRule: "HostSNI(`example.org`)", serverName: "example.org", }, { desc: "Two matching rules, calculated priority", rules: map[string]int{ "HostSNI(`example.org`)": 0, "HostSNI(`example.com`)": 0, }, expectedRule: "HostSNI(`example.org`)", serverName: "example.org", }, { desc: "Two matching rules, custom priority", rules: map[string]int{ "HostSNI(`example.com`)": 10000, "HostSNI(`example.org`)": 0, }, expectedRule: "HostSNI(`example.com`)", serverName: "example.com", }, } for _, test := range testCases { t.Run(test.desc, func(t *testing.T) { t.Parallel() muxer, err := NewMuxer() require.NoError(t, err) matchedRule := "" for rule, priority := range test.rules { err := muxer.AddRoute(rule, "", priority, tcp.HandlerFunc(func(conn tcp.WriteCloser) { matchedRule = rule })) require.NoError(t, err) } handler, _ := muxer.Match(ConnData{ serverName: test.serverName, }) require.NotNil(t, handler) handler.ServeTCP(nil) assert.Equal(t, test.expectedRule, matchedRule) }) } } func TestGetRulePriority(t *testing.T) { testCases := []struct { desc string rule string expected int }{ { desc: "simple rule", rule: "HostSNI(`example.org`)", expected: 22, }, { desc: "HostSNI(`*`) rule", rule: "HostSNI(`*`)", expected: -1, }, { desc: "strange HostSNI(`*`) rule", rule: " HostSNI ( `*` ) ", expected: -1, }, } for _, test := range testCases { t.Run(test.desc, func(t *testing.T) { t.Parallel() assert.Equal(t, test.expected, GetRulePriority(test.rule)) }) } } type fakeConn struct { call map[string]int remoteAddr net.Addr } func (f *fakeConn) Read(b []byte) (n int, err error) { panic("implement me") } func (f *fakeConn) Write(b []byte) (n int, err error) { f.call[string(b)]++ return len(b), nil } func (f *fakeConn) Close() error { panic("implement me") } func (f *fakeConn) LocalAddr() net.Addr { panic("implement me") } func (f *fakeConn) RemoteAddr() net.Addr { return f.remoteAddr } func (f *fakeConn) SetDeadline(t time.Time) error { panic("implement me") } func (f *fakeConn) SetReadDeadline(t time.Time) error { panic("implement me") } func (f *fakeConn) SetWriteDeadline(t time.Time) error { panic("implement me") } func (f *fakeConn) CloseWrite() error { panic("implement me") } type fakeAddr struct { addr string } func (f fakeAddr) String() string { return f.addr } func (f fakeAddr) Network() string { panic("Implement me") }