MACRAW IP stack with ARP/ICMP, stable device ordering, LED blink on test

lib/client/serial.go

@@ -3,6 +3,7 @@ package client
 import (
 	"fmt"
 	"io"
+	"slices"
 	"strings"
 	"time"
 
@@ -15,12 +16,23 @@ func ListSerial() ([]string, error) {
 	if err != nil {
 		return nil, fmt.Errorf("enumerating ports: %w", err)
 	}
-	var result []string
+	type entry struct {
+		name   string
+		serial string
+	}
+	var entries []entry
 	for _, p := range ports {
 		if p.IsUSB && p.VID == "2E8A" && strings.HasPrefix(p.Name, "/dev/cu.") {
-			result = append(result, p.Name)
+			entries = append(entries, entry{p.Name, p.SerialNumber})
 		}
 	}
+	slices.SortFunc(entries, func(a, b entry) int {
+		return strings.Compare(a.serial, b.serial)
+	})
+	var result []string
+	for _, e := range entries {
+		result = append(result, e.name)
+	}
 	return result, nil
 }