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@ -24,6 +24,7 @@ var OnlineUsers = make(map[string]UdpMessage) |
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func init() { |
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go InitBroadcast() |
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go ListenForBroadcast() |
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go ListenLocalBroadcast() |
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} |
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func InitBroadcast() { |
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@ -41,15 +42,23 @@ func InitBroadcast() { |
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Hostname: hostname, |
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Message: "", |
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} |
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err = SendBroadcast(message) |
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//发送多播消息
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broadcastAddr := GetBroadcastAddr() |
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err = SendBroadcast(broadcastAddr, message) |
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if err != nil { |
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log.Println("Failed to send broadcast message:", err) |
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} |
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//发送广播播消息
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moreAddr := "255.255.255.255:20249" |
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err = SendBroadcast(moreAddr, message) |
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if err != nil { |
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log.Println("Failed to send more broadcast message:", err) |
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} |
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} |
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} |
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func SendBroadcast(message UdpMessage) error { |
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broadcastAddr := GetBroadcastAddr() |
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func SendBroadcast(broadcastAddr string, message UdpMessage) error { |
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addr, err := net.ResolveUDPAddr("udp4", broadcastAddr) |
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if err != nil { |
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log.Printf("Failed to resolve UDP address %s: %v", broadcastAddr, err) |
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@ -91,11 +100,11 @@ func SendBroadcast(message UdpMessage) error { |
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return err |
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} |
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log.Printf("发送广播消息到 %s 成功", broadcastAddr) |
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log.Printf("发送消息到 %s 成功", broadcastAddr) |
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return nil |
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} |
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// ListenForBroadcast 监听广播消息
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// ListenForBroadcast 监听多播消息
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func ListenForBroadcast() { |
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broadcastAddr := GetBroadcastAddr() |
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addr, err := net.ResolveUDPAddr("udp4", broadcastAddr) |
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@ -141,6 +150,44 @@ func ListenForBroadcast() { |
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} |
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} |
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// ListenLocalBroadcast 监听广播消息
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func ListenLocalBroadcast() { |
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// 使用本地地址监听
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localAddr, err := net.ResolveUDPAddr("udp4", ":56780") |
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if err != nil { |
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log.Fatalf("Failed to resolve local UDP address: %v", err) |
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} |
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conn, err := net.ListenUDP("udp4", localAddr) |
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if err != nil { |
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log.Fatalf("Failed to listen on UDP address: %v", err) |
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} |
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defer conn.Close() |
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// 开始监听广播消息
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buffer := make([]byte, 1024) |
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for { |
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n, remoteAddr, err := conn.ReadFromUDP(buffer) |
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if err != nil { |
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log.Printf("Error reading from UDP: %v", err) |
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continue |
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} |
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var udpMsg UdpMessage |
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err = json.Unmarshal(buffer[:n], &udpMsg) |
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if err != nil { |
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log.Printf("Error unmarshalling JSON: %v", err) |
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continue |
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} |
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OnlineUsers[udpMsg.IP] = udpMsg |
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if udpMsg.Type == "file" { |
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RecieveFile(udpMsg) |
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} |
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log.Printf("Received message from %s: %s", remoteAddr, udpMsg.Hostname) |
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} |
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} |
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// SendToIP 向指定的 IP 地址发送 UDP 消息
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func SendToIP(message UdpMessage) error { |
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toIp := message.IP |
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