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change udp

master
godo 9 months ago
parent
commit
f3a2c877b7
  1. 57
      godo/localchat/udp.go

57
godo/localchat/udp.go

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

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