feat: can finder mvp

Author: soulteary

go.mod

@@ -0,0 +1,3 @@
+module can-finder
+
+go 1.24.1

main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net"
+)
+
+// DeviceInfo 接收到的设备信息结构体
+type DeviceInfo struct {
+	Name    string `json:"name"`
+	IP      string `json:"ip"`
+	MAC     string `json:"mac"`
+	Model   string `json:"model"`
+	Version string `json:"version"`
+}
+
+func main() {
+	addr := net.UDPAddr{
+		Port: 9999,
+		IP:   net.ParseIP("0.0.0.0"),
+	}
+
+	conn, err := net.ListenUDP("udp4", &addr)
+	if err != nil {
+		log.Fatalf("监听UDP失败: %v", err)
+	}
+	defer conn.Close()
+
+	buf := make([]byte, 1024)
+
+	log.Println("开始监听设备广播...")
+
+	for {
+		n, remoteAddr, err := conn.ReadFromUDP(buf)
+		if err != nil {
+			log.Printf("接收失败: %v", err)
+			continue
+		}
+
+		var device DeviceInfo
+		if err := json.Unmarshal(buf[:n], &device); err != nil {
+			log.Printf("JSON解析失败: %v", err)
+			continue
+		}
+
+		log.Printf("发现设备 %s (%s) 来自 %s, 型号: %s, 版本: %s",
+			device.Name, device.IP, remoteAddr.IP, device.Model, device.Version)
+	}
+}
+