Switch to IPv4 zeroconf, add test framework with discovery test, fix serial enumeration

lib/client/client.go

@@ -92,3 +92,7 @@ func (c *Client) PICOBOOT() error {
 func (c *Client) Info() (*ResponseInfo, error) {
 	return roundTrip[ResponseInfo](c, &RequestInfo{})
 }
+
+func (c *Client) Test(name string) (*ResponseTest, error) {
+	return roundTrip[ResponseTest](c, &RequestTest{Name: name})
+}

lib/client/serial.go

@@ -3,6 +3,7 @@ package client
 import (
 	"fmt"
 	"io"
+	"strings"
 	"time"
 
 	"go.bug.st/serial"
@@ -16,7 +17,7 @@ func ListSerial() ([]string, error) {
 	}
 	var result []string
 	for _, p := range ports {
-		if p.IsUSB {
+		if p.IsUSB && p.VID == "2E8A" && strings.HasPrefix(p.Name, "/dev/cu.") {
 			result = append(result, p.Name)
 		}
 	}

lib/client/types.go

@@ -9,10 +9,19 @@ type RequestInfo struct{}
 type ResponseInfo struct {
 	BoardID      [8]byte
 	MAC          [6]byte
-	LinkLocal    [16]byte
+	IP           [4]byte
 	FirmwareName string
 }
 
+type RequestTest struct {
+	Name string
+}
+
+type ResponseTest struct {
+	Pass     bool
+	Messages []string
+}
+
 type DeviceError struct {
 	Code    uint32
 	Message string
@@ -35,4 +44,6 @@ func init() {
 	msgpack.RegisterExt(3, (*ResponsePICOBOOT)(nil))
 	msgpack.RegisterExt(4, (*RequestInfo)(nil))
 	msgpack.RegisterExt(5, (*ResponseInfo)(nil))
+	msgpack.RegisterExt(127, (*RequestTest)(nil))
+	msgpack.RegisterExt(126, (*ResponseTest)(nil))
 }