Fix Cwtch on Tails > 5.13

templates/lib_template.go

@@ -22,6 +22,7 @@ import (
 	"runtime"
 	"runtime/pprof"
 	"strings"
+	"strconv"
 	"time"
 	mrand "math/rand"
 	"crypto/rand"
@@ -469,7 +470,30 @@ func buildACN(globalSettings settings.GlobalSettings, torPath string, appDir str
 	// Override Ports if on Tails...
 	if cwtchTails := os.Getenv("CWTCH_TAILS"); strings.ToLower(cwtchTails) == "true" {
 		log.Infof("CWTCH_TAILS environment variable set... overriding tor config...")
+
 		controlPort = 9051
+
+		// In tails 5.13 the control port was changed to 951
+		// so read the Tails Version File and if it exists...
+		b, err := os.ReadFile("/etc/amnesia/version")
+		if err == nil {
+				// the file should start with the version followed
+				// by a space...
+				versionEnd := strings.Index(string(b), " ")
+				versionStr := string(b)[:versionEnd]
+				version, err := strconv.ParseFloat(versionStr, 64)
+				if err == nil {
+					log.Infof("Confirming Tails Version: %v", version)
+					// assert the control port if we are at the dedicated version...
+					// we know this change happened sometime after 5.11
+					if version >= 5.13 {
+							controlPort = 951
+					}
+				} else {
+					log.Errorf("Unable to confirm Tails version. CWTCH_TAILS options may not function correctly.")
+				}
+		}
+	
 		socksPort = 9050
 		globalSettings.CustomControlPort = controlPort
 		globalSettings.CustomSocksPort = socksPort