Fix setting up connection to non-IP sockets

control.go

@@ -270,7 +270,11 @@ type connHost struct {
 func (c *controlConn) setupConn(conn *Conn) error {
 	// we need up-to-date host info for the filterHost call below
 	iter := conn.querySystemLocal(context.TODO())
-	host, err := c.session.hostInfoFromIter(iter, conn.host.connectAddress, conn.conn.RemoteAddr().(*net.TCPAddr).Port)
+	defaultPort := 9042
+	if tcpAddr, ok := conn.conn.RemoteAddr().(*net.TCPAddr); ok {
+		defaultPort = tcpAddr.Port
+	}
+	host, err := c.session.hostInfoFromIter(iter, conn.host.connectAddress, defaultPort)
 	if err != nil {
 		return err
 	}

control_integration_test.go

@@ -0,0 +1,71 @@
+//go:build integration && scylla
+// +build integration,scylla
+
+package gocql
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"testing"
+)
+
+// unixSocketDialer is a special dialer which connects only to the maintenance_socket.
+type unixSocketDialer struct {
+	dialer     net.Dialer
+	socketPath string
+}
+
+func (d unixSocketDialer) DialContext(_ context.Context, _, _ string) (net.Conn, error) {
+	return d.dialer.Dial("unix", d.socketPath)
+}
+
+func TestUnixSockets(t *testing.T) {
+	socketPath := "/tmp/scylla/cql.m"
+
+	c := createCluster()
+	c.NumConns = 1
+	c.DisableInitialHostLookup = true
+	c.ProtoVersion = 3
+	c.ReconnectInterval = 0
+	c.WriteCoalesceWaitTime = 0
+
+	c.Events.DisableNodeStatusEvents = true
+	c.Events.DisableTopologyEvents = true
+	c.Events.DisableSchemaEvents = true
+
+	d := net.Dialer{
+		Timeout: c.Timeout,
+	}
+	if c.SocketKeepalive > 0 {
+		d.KeepAlive = c.SocketKeepalive
+	}
+
+	c.Dialer = unixSocketDialer{
+		dialer:     d,
+		socketPath: socketPath,
+	}
+
+	sess, err := c.CreateSession()
+	if err != nil {
+		panic(fmt.Sprintf("unable to create session: %v", err))
+	}
+
+	defer sess.Close()
+
+	keyspace := "test1"
+
+	err = createTable(sess, `DROP KEYSPACE IF EXISTS `+keyspace)
+	if err != nil {
+		t.Fatal("unable to drop keyspace:", err)
+	}
+
+	err = createTable(sess, fmt.Sprintf(`CREATE KEYSPACE %s
+	WITH replication = {
+		'class' : 'SimpleStrategy',
+		'replication_factor' : 1
+	}`, keyspace))
+	if err != nil {
+		t.Fatal("unable to create keyspace:", err)
+	}
+}

docker-compose.yml

@@ -15,6 +15,7 @@ services:
       public:
         ipv4_address: 192.168.100.11
     volumes:
+    - /tmp/scylla:/var/lib/scylla/
     - type: bind
       source: ./testdata/config/scylla.yaml
       target: /etc/scylla/scylla.yaml

integration.sh

@@ -27,6 +27,8 @@ function scylla_restart() {
 
 scylla_restart
 
+sudo chmod 0777 /tmp/scylla/cql.m
+
 readonly clusterSize=1
 readonly multiNodeClusterSize=3
 readonly scylla_liveset="192.168.100.11"