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change udp

master
godo 9 months ago
parent
commit
c1cfb25990
  1. 7
      godo/cmd/main.go
  2. 444
      godo/localchat/file.go
  3. 29
      godo/localchat/info.go
  4. 180
      godo/localchat/linux.go
  5. 70
      godo/localchat/send.go
  6. 112
      godo/localchat/udp.go
  7. 182
      godo/localchat/windows.go

7
godo/cmd/main.go

@ -5,7 +5,6 @@ import (
"godo/deps" "godo/deps"
"godo/files" "godo/files"
"godo/libs" "godo/libs"
"godo/localchat"
"godo/store" "godo/store"
"godo/sys" "godo/sys"
"godo/webdav" "godo/webdav"
@ -78,10 +77,10 @@ func OsStart() {
fileRouter.HandleFunc("/unzip", files.HandleUnZip).Methods(http.MethodGet) fileRouter.HandleFunc("/unzip", files.HandleUnZip).Methods(http.MethodGet)
fileRouter.HandleFunc("/watch", files.WatchHandler).Methods(http.MethodGet) fileRouter.HandleFunc("/watch", files.WatchHandler).Methods(http.MethodGet)
localchatRouter := router.PathPrefix("/localchat").Subrouter() //localchatRouter := router.PathPrefix("/localchat").Subrouter()
// localchatRouter.HandleFunc("/sse", localchat.SseHandler).Methods(http.MethodGet) // localchatRouter.HandleFunc("/sse", localchat.SseHandler).Methods(http.MethodGet)
localchatRouter.HandleFunc("/message", localchat.HandleMessage).Methods(http.MethodPost) // localchatRouter.HandleFunc("/message", localchat.HandleMessage).Methods(http.MethodPost)
localchatRouter.HandleFunc("/file", localchat.HandlerFile).Methods(http.MethodPost) // localchatRouter.HandleFunc("/file", localchat.HandlerFile).Methods(http.MethodPost)
// localchatRouter.HandleFunc("/check", localchat.CheckUserHanlder).Methods(http.MethodGet) // localchatRouter.HandleFunc("/check", localchat.CheckUserHanlder).Methods(http.MethodGet)
// 注册 WebDAV 路由 // 注册 WebDAV 路由

444
godo/localchat/file.go

@ -1,224 +1,224 @@
package localchat package localchat
import ( // import (
"encoding/json" // "encoding/json"
"fmt" // "fmt"
"godo/libs" // "godo/libs"
"io" // "io"
"log" // "log"
"net" // "net"
"net/http" // "net/http"
"os" // "os"
"path/filepath" // "path/filepath"
"time" // "time"
) // )
const ( // const (
fileSize = 1024 // 每个数据包的大小 // fileSize = 1024 // 每个数据包的大小
) // )
type FileChunk struct { // type FileChunk struct {
ChunkIndex int `json:"chunk_index"` // ChunkIndex int `json:"chunk_index"`
Data []byte `json:"data"` // Data []byte `json:"data"`
Checksum uint32 `json:"checksum"` // Checksum uint32 `json:"checksum"`
Timestamp time.Time `json:"timestamp"` // Timestamp time.Time `json:"timestamp"`
Filename string `json:"filename"` // Filename string `json:"filename"`
} // }
// HandleMessage 处理 HTTP 请求 // // HandleMessage 处理 HTTP 请求
func HandleMessage(w http.ResponseWriter, r *http.Request) { // func HandleMessage(w http.ResponseWriter, r *http.Request) {
var msg UdpMessage // var msg UdpMessage
decoder := json.NewDecoder(r.Body) // decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&msg); err != nil { // if err := decoder.Decode(&msg); err != nil {
http.Error(w, "Invalid request body", http.StatusBadRequest) // http.Error(w, "Invalid request body", http.StatusBadRequest)
return // return
} // }
defer r.Body.Close() // defer r.Body.Close()
err := SendToIP(msg) // err := SendToIP(msg)
if err != nil { // if err != nil {
http.Error(w, "Failed to send message", http.StatusInternalServerError) // http.Error(w, "Failed to send message", http.StatusInternalServerError)
return // return
} // }
w.WriteHeader(http.StatusOK) // w.WriteHeader(http.StatusOK)
fmt.Fprintln(w, "Text message send successfully") // fmt.Fprintln(w, "Text message send successfully")
} // }
func HandlerFile(w http.ResponseWriter, r *http.Request) { // func HandlerFile(w http.ResponseWriter, r *http.Request) {
// 初始化多播地址 // // 初始化多播地址
var msg UdpMessage // var msg UdpMessage
decoder := json.NewDecoder(r.Body) // decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&msg); err != nil { // if err := decoder.Decode(&msg); err != nil {
http.Error(w, "Invalid request body", http.StatusBadRequest) // http.Error(w, "Invalid request body", http.StatusBadRequest)
return // return
} // }
defer r.Body.Close() // defer r.Body.Close()
toIp := msg.IP // toIp := msg.IP
preferredIP, err := GetLocalIP() // preferredIP, err := GetLocalIP()
if err != nil { // if err != nil {
http.Error(w, "Failed to get preferred IP", http.StatusInternalServerError) // http.Error(w, "Failed to get preferred IP", http.StatusInternalServerError)
return // return
} // }
msg.IP = preferredIP // msg.IP = preferredIP
msg.Type = "file" // msg.Type = "file"
basePath, err := libs.GetOsDir() // basePath, err := libs.GetOsDir()
if err != nil { // if err != nil {
libs.HTTPError(w, http.StatusInternalServerError, err.Error()) // libs.HTTPError(w, http.StatusInternalServerError, err.Error())
return // return
} // }
filePath := filepath.Join(basePath, msg.Message.(string)) // filePath := filepath.Join(basePath, msg.Message.(string))
// 处理单个文件或整个文件夹 // // 处理单个文件或整个文件夹
if fileInfo, err := os.Stat(filePath); err == nil { // if fileInfo, err := os.Stat(filePath); err == nil {
if fileInfo.IsDir() { // if fileInfo.IsDir() {
handleDirectory(filePath, toIp, msg) // handleDirectory(filePath, toIp, msg)
} else { // } else {
handleFile(filePath, toIp, msg) // handleFile(filePath, toIp, msg)
} // }
} else { // } else {
http.Error(w, "Failed to stat path", http.StatusInternalServerError) // http.Error(w, "Failed to stat path", http.StatusInternalServerError)
return // return
} // }
} // }
func handleFile(filePath string, toIp string, message UdpMessage) { // func handleFile(filePath string, toIp string, message UdpMessage) {
// 打开文件 // // 打开文件
file, err := os.Open(filePath) // file, err := os.Open(filePath)
if err != nil { // if err != nil {
log.Fatalf("Failed to open file: %v", err) // log.Fatalf("Failed to open file: %v", err)
} // }
defer file.Close() // defer file.Close()
// 获取文件大小 // // 获取文件大小
fileInfo, err := file.Stat() // fileInfo, err := file.Stat()
if err != nil { // if err != nil {
log.Fatalf("Failed to get file info: %v", err) // log.Fatalf("Failed to get file info: %v", err)
} // }
fileSize := fileInfo.Size() // fileSize := fileInfo.Size()
// 计算需要发送的数据包数量 // // 计算需要发送的数据包数量
numChunks := (fileSize + fileSize - 1) / fileSize // numChunks := (fileSize + fileSize - 1) / fileSize
// 发送文件 // // 发送文件
SendFile(file, int(numChunks), toIp, message) // SendFile(file, int(numChunks), toIp, message)
} // }
func handleDirectory(dirPath string, toIp string, message UdpMessage) { // func handleDirectory(dirPath string, toIp string, message UdpMessage) {
err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error { // err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error {
if err != nil { // if err != nil {
return err // return err
} // }
if !info.IsDir() { // if !info.IsDir() {
handleFile(path, toIp, message) // handleFile(path, toIp, message)
} // }
return nil // return nil
}) // })
if err != nil { // if err != nil {
log.Fatalf("Failed to walk directory: %v", err) // log.Fatalf("Failed to walk directory: %v", err)
} // }
} // }
func SendFile(file *os.File, numChunks int, toIp string, message UdpMessage) { // func SendFile(file *os.File, numChunks int, toIp string, message UdpMessage) {
// 逐块读取文件并发送 // // 逐块读取文件并发送
for i := 0; i < numChunks; i++ { // for i := 0; i < numChunks; i++ {
var chunkData [fileSize]byte // var chunkData [fileSize]byte
n, err := file.Read(chunkData[:]) // n, err := file.Read(chunkData[:])
if err != nil && err != io.EOF { // if err != nil && err != io.EOF {
log.Fatalf("Failed to read file chunk: %v", err) // log.Fatalf("Failed to read file chunk: %v", err)
} // }
// 创建文件块 // // 创建文件块
chunk := FileChunk{ // chunk := FileChunk{
ChunkIndex: i, // ChunkIndex: i,
Data: chunkData[:n], // Data: chunkData[:n],
Checksum: calculateChecksum(chunkData[:n]), // Checksum: calculateChecksum(chunkData[:n]),
Timestamp: time.Now(), // Timestamp: time.Now(),
Filename: filepath.Base(file.Name()), // Filename: filepath.Base(file.Name()),
} // }
message.Message = chunk // message.Message = chunk
// 将文件块转换为 JSON 格式 // // 将文件块转换为 JSON 格式
data, err := json.Marshal(message) // data, err := json.Marshal(message)
if err != nil { // if err != nil {
log.Fatalf("Failed to marshal chunk: %v", err) // log.Fatalf("Failed to marshal chunk: %v", err)
} // }
// 发送文件块 // // 发送文件块
addr, err := net.ResolveUDPAddr("udp4", toIp) // addr, err := net.ResolveUDPAddr("udp4", toIp)
if err != nil { // if err != nil {
log.Fatalf("Failed to resolve UDP address: %v", err) // log.Fatalf("Failed to resolve UDP address: %v", err)
} // }
conn, err := net.DialUDP("udp4", nil, addr) // conn, err := net.DialUDP("udp4", nil, addr)
if err != nil { // if err != nil {
log.Fatalf("Failed to dial UDP address: %v", err) // log.Fatalf("Failed to dial UDP address: %v", err)
} // }
defer conn.Close() // defer conn.Close()
_, err = conn.Write(data) // _, err = conn.Write(data)
if err != nil { // if err != nil {
log.Printf("Failed to write data: %v", err) // log.Printf("Failed to write data: %v", err)
} // }
fmt.Printf("发送文件块 %d 到 %s 成功\n", i, toIp) // fmt.Printf("发送文件块 %d 到 %s 成功\n", i, toIp)
} // }
} // }
func RecieveFile(msg UdpMessage) { // func RecieveFile(msg UdpMessage) {
chunk := msg.Message.(FileChunk) // chunk := msg.Message.(FileChunk)
// 验证校验和 // // 验证校验和
calculatedChecksum := calculateChecksum(chunk.Data) // calculatedChecksum := calculateChecksum(chunk.Data)
if calculatedChecksum != chunk.Checksum { // if calculatedChecksum != chunk.Checksum {
fmt.Printf("Checksum mismatch for chunk %d from %s\n", chunk.ChunkIndex, msg.IP) // fmt.Printf("Checksum mismatch for chunk %d from %s\n", chunk.ChunkIndex, msg.IP)
return // return
} // }
baseDir, err := libs.GetOsDir() // baseDir, err := libs.GetOsDir()
if err != nil { // if err != nil {
log.Printf("Failed to get OS directory: %v", err) // log.Printf("Failed to get OS directory: %v", err)
return // return
} // }
// 创建接收文件的目录 // // 创建接收文件的目录
receiveDir := filepath.Join(baseDir, "C", "Users", "Reciv", time.Now().Format("2006-01-02")) // receiveDir := filepath.Join(baseDir, "C", "Users", "Reciv", time.Now().Format("2006-01-02"))
if !libs.PathExists(receiveDir) { // if !libs.PathExists(receiveDir) {
err := os.MkdirAll(receiveDir, 0755) // err := os.MkdirAll(receiveDir, 0755)
if err != nil { // if err != nil {
log.Printf("Failed to create receive directory: %v", err) // log.Printf("Failed to create receive directory: %v", err)
return // return
} // }
} // }
// 确定文件路径 // // 确定文件路径
filePath := filepath.Join(receiveDir, chunk.Filename) // filePath := filepath.Join(receiveDir, chunk.Filename)
// 如果文件不存在,则创建新文件 // // 如果文件不存在,则创建新文件
if _, err := os.Stat(filePath); os.IsNotExist(err) { // if _, err := os.Stat(filePath); os.IsNotExist(err) {
file, err := os.Create(filePath) // file, err := os.Create(filePath)
if err != nil { // if err != nil {
log.Printf("Failed to create file: %v", err) // log.Printf("Failed to create file: %v", err)
return // return
} // }
defer file.Close() // defer file.Close()
} // }
// 打开或追加到现有文件 // // 打开或追加到现有文件
file, err := os.OpenFile(filePath, os.O_APPEND|os.O_WRONLY, 0644) // file, err := os.OpenFile(filePath, os.O_APPEND|os.O_WRONLY, 0644)
if err != nil { // if err != nil {
log.Printf("Failed to open file: %v", err) // log.Printf("Failed to open file: %v", err)
return // return
} // }
defer file.Close() // defer file.Close()
// 写入数据 // // 写入数据
_, err = file.Write(chunk.Data) // _, err = file.Write(chunk.Data)
if err != nil { // if err != nil {
log.Printf("Failed to write data to file: %v", err) // log.Printf("Failed to write data to file: %v", err)
return // return
} // }
fmt.Printf("接收到文件块 %d 从 %s 成功\n", chunk.ChunkIndex, msg.IP) // fmt.Printf("接收到文件块 %d 从 %s 成功\n", chunk.ChunkIndex, msg.IP)
} // }
func calculateChecksum(data []byte) uint32 { // func calculateChecksum(data []byte) uint32 {
checksum := uint32(0) // checksum := uint32(0)
for _, b := range data { // for _, b := range data {
checksum += uint32(b) // checksum += uint32(b)
} // }
return checksum // return checksum
} // }

29
godo/localchat/info.go

@ -1,23 +1,18 @@
package localchat package localchat
import ( // // 获取自己的IP地址和主机名
"fmt" // func GetMyIPAndHostname() (string, string, error) {
"os" // hostname, err := os.Hostname()
) // if err != nil {
// return "", "", fmt.Errorf("failed to get hostname: %w", err)
// 获取自己的IP地址和主机名 // }
func GetMyIPAndHostname() (string, string, error) { // preferredIP, err := GetLocalIP()
hostname, err := os.Hostname() // if err != nil {
if err != nil { // return "", "", fmt.Errorf("failed to get IP address: %w", err)
return "", "", fmt.Errorf("failed to get hostname: %w", err) // }
}
preferredIP, err := GetLocalIP()
if err != nil {
return "", "", fmt.Errorf("failed to get IP address: %w", err)
}
return preferredIP, hostname, nil // return preferredIP, hostname, nil
} // }
// func GetLocalIP() (string, error) { // func GetLocalIP() (string, error) {
// addrs, err := net.Interfaces() // addrs, err := net.Interfaces()

180
godo/localchat/linux.go

@ -3,106 +3,106 @@
package localchat package localchat
import ( // import (
"encoding/json" // "encoding/json"
"log" // "log"
"net" // "net"
) // )
func SendBroadcast(broadcastAddr string, message UdpMessage) error { // func SendBroadcast(broadcastAddr string, message UdpMessage) error {
addr, err := net.ResolveUDPAddr("udp4", broadcastAddr) // addr, err := net.ResolveUDPAddr("udp4", broadcastAddr)
if err != nil { // if err != nil {
log.Printf("Failed to resolve UDP address %s: %v", broadcastAddr, err) // log.Printf("Failed to resolve UDP address %s: %v", broadcastAddr, err)
return err // return err
} // }
// 使用本地地址进行连接 // // 使用本地地址进行连接
localAddr, err := net.ResolveUDPAddr("udp4", "0.0.0.0:0") // localAddr, err := net.ResolveUDPAddr("udp4", "0.0.0.0:0")
if err != nil { // if err != nil {
log.Printf("Failed to resolve local UDP address: %v", err) // log.Printf("Failed to resolve local UDP address: %v", err)
return err // return err
} // }
conn, err := net.ListenUDP("udp4", localAddr) // conn, err := net.ListenUDP("udp4", localAddr)
if err != nil { // if err != nil {
log.Printf("Failed to listen on UDP address %s: %v", broadcastAddr, err) // log.Printf("Failed to listen on UDP address %s: %v", broadcastAddr, err)
return err // return err
} // }
defer conn.Close() // defer conn.Close()
// 获取本地 IP 地址 // // 获取本地 IP 地址
localIP, err := GetLocalIP() // localIP, err := GetLocalIP()
log.Printf("本地 IP 地址: %s", localIP) // log.Printf("本地 IP 地址: %s", localIP)
if err != nil { // if err != nil {
log.Printf("Failed to get local IP address: %v", err) // log.Printf("Failed to get local IP address: %v", err)
return err // return err
} // }
message.IP = localIP // message.IP = localIP
data, err := json.Marshal(message) // data, err := json.Marshal(message)
if err != nil { // if err != nil {
log.Printf("Failed to marshal JSON for %s: %v", broadcastAddr, err) // log.Printf("Failed to marshal JSON for %s: %v", broadcastAddr, err)
return err // return err
} // }
_, err = conn.WriteToUDP(data, addr) // _, err = conn.WriteToUDP(data, addr)
if err != nil { // if err != nil {
log.Printf("Failed to write to UDP address %s: %v", broadcastAddr, err) // log.Printf("Failed to write to UDP address %s: %v", broadcastAddr, err)
return err // return err
} // }
log.Printf("发送消息到 %s 成功", broadcastAddr) // log.Printf("发送消息到 %s 成功", broadcastAddr)
return nil // return nil
} // }
// ListenForBroadcast 监听多播消息 // // ListenForBroadcast 监听多播消息
func ListenForBroadcast() { // func ListenForBroadcast() {
broadcastAddr := GetBroadcastAddr() // broadcastAddr := GetBroadcastAddr()
addr, err := net.ResolveUDPAddr("udp4", broadcastAddr) // addr, err := net.ResolveUDPAddr("udp4", broadcastAddr)
if err != nil { // if err != nil {
log.Fatalf("Failed to resolve UDP address: %v", err) // log.Fatalf("Failed to resolve UDP address: %v", err)
} // }
// 使用 ListenMulticastUDP 创建多播连接 // // 使用 ListenMulticastUDP 创建多播连接
conn, err := net.ListenMulticastUDP("udp4", nil, addr) // conn, err := net.ListenMulticastUDP("udp4", nil, addr)
if err != nil { // if err != nil {
log.Fatalf("Failed to listen on UDP address: %v", err) // log.Fatalf("Failed to listen on UDP address: %v", err)
} // }
defer conn.Close() // defer conn.Close()
// 获取本地 IP 地址 // // 获取本地 IP 地址
localIP, err := GetLocalIP() // localIP, err := GetLocalIP()
if err != nil { // if err != nil {
log.Printf("Failed to get local IP address: %v", err) // log.Printf("Failed to get local IP address: %v", err)
} // }
// 开始监听多播消息 // // 开始监听多播消息
buffer := make([]byte, 1024) // buffer := make([]byte, 1024)
for { // for {
n, remoteAddr, err := conn.ReadFromUDP(buffer) // n, remoteAddr, err := conn.ReadFromUDP(buffer)
if err != nil { // if err != nil {
log.Printf("Error reading from UDP: %v", err) // log.Printf("Error reading from UDP: %v", err)
continue // continue
} // }
var udpMsg UdpMessage // var udpMsg UdpMessage
err = json.Unmarshal(buffer[:n], &udpMsg) // err = json.Unmarshal(buffer[:n], &udpMsg)
if err != nil { // if err != nil {
log.Printf("Error unmarshalling JSON: %v", err) // log.Printf("Error unmarshalling JSON: %v", err)
continue // continue
} // }
if udpMsg.IP == localIP { // if udpMsg.IP == localIP {
continue // continue
} // }
OnlineUsers[udpMsg.IP] = udpMsg // OnlineUsers[udpMsg.IP] = udpMsg
if udpMsg.Type == "file" { // if udpMsg.Type == "file" {
RecieveFile(udpMsg) // RecieveFile(udpMsg)
} // }
log.Printf("Received message from %s: %s", remoteAddr, udpMsg.Hostname) // log.Printf("Received message from %s: %s", remoteAddr, udpMsg.Hostname)
} // }
} // }
func GetBroadcastAddr() string { // func GetBroadcastAddr() string {
//return libs.GetUdpAddr() // //return libs.GetUdpAddr()
return "224.0.0.251:20249" // return "224.0.0.251:20249"
} // }

70
godo/localchat/send.go

@ -0,0 +1,70 @@
package localchat
// import (
// "encoding/json"
// "fmt"
// "godo/libs"
// "log"
// "net"
// "strings"
// )
// // SendToIP 向指定的 IP 地址发送 UDP 消息
// func SendToIP(message UdpMessage) error {
// toIp := message.IP
// port := GetBroadcastPort()
// addr, err := net.ResolveUDPAddr("udp4", fmt.Sprintf("%s:%s", toIp, port))
// if err != nil {
// log.Printf("Failed to resolve UDP address %s:%s: %v", toIp, port, err)
// return err
// }
// // 使用本地地址进行连接
// localAddr, err := net.ResolveUDPAddr("udp4", "0.0.0.0:0")
// if err != nil {
// log.Printf("Failed to resolve local UDP address: %v", err)
// return err
// }
// conn, err := net.ListenUDP("udp4", localAddr)
// if err != nil {
// log.Printf("Failed to listen on UDP address %s: %v", toIp, err)
// return err
// }
// defer conn.Close()
// // 获取本地 IP 地址
// localIP, err := GetLocalIP()
// if err != nil {
// log.Printf("Failed to get local IP address: %v", err)
// return err
// }
// message.IP = localIP
// data, err := json.Marshal(message)
// if err != nil {
// log.Printf("Failed to marshal JSON for %s: %v", toIp, err)
// return err
// }
// _, err = conn.WriteToUDP(data, addr)
// if err != nil {
// log.Printf("Failed to write to UDP address %s: %v", toIp, err)
// return err
// }
// log.Printf("发送 UDP 消息到 %s 成功", toIp)
// return nil
// }
// // 获取 OnlineUsers 的最新状态
// func GetOnlineUsers() map[string]UdpMessage {
// return OnlineUsers
// }
// func GetLocalIP() (string, error) {
// return libs.GetIPAddress()
// }
// func GetBroadcastPort() string {
// addr := GetBroadcastAddr()
// return addr[strings.LastIndex(addr, ":")+1:]
// }

112
godo/localchat/udp.go

@ -2,25 +2,26 @@ package localchat
import ( import (
"encoding/json" "encoding/json"
"fmt"
"godo/libs"
"log" "log"
"net" "net"
"os" "os"
"strings"
"time" "time"
) )
type UdpMessage struct { type UdpMessage struct {
Hostname string `json:"hostname"`
Type string `json:"type"` Type string `json:"type"`
Time time.Time `json:"time"`
IP string `json:"ip"` IP string `json:"ip"`
Message any `json:"message"`
}
type UdpAddress struct {
Hostname string `json:"hostname"` Hostname string `json:"hostname"`
Message interface{} `json:"message"` IP string `json:"ip"`
} }
var OnlineUsers = make(map[string]UdpMessage) var OnlineUsers []UdpAddress
// SendBroadcast 发送广播消息
func init() { func init() {
go InitBroadcast() go InitBroadcast()
go ListenForBroadcast() go ListenForBroadcast()
@ -41,25 +42,18 @@ func InitBroadcast() {
Message: "", Message: "",
} }
//发送多播消息 //发送多播消息
//broadcastAddr := GetBroadcastAddr() broadcastAddr := GetBroadcastAddr()
err = SendBroadcast("224.0.0.251:20249", message) err = SendBroadcast(broadcastAddr, message)
if err != nil {
log.Println("Failed to send broadcast message:", err)
}
err = SendBroadcast("255.255.255.255:20249", message)
if err != nil { if err != nil {
log.Println("Failed to send broadcast message:", err) log.Println("Failed to send broadcast message:", err)
} }
} }
} }
func SendBroadcast(broadcastAddr string, message UdpMessage) error {
// SendToIP 向指定的 IP 地址发送 UDP 消息 addr, err := net.ResolveUDPAddr("udp4", broadcastAddr)
func SendToIP(message UdpMessage) error {
toIp := message.IP
port := GetBroadcastPort()
addr, err := net.ResolveUDPAddr("udp4", fmt.Sprintf("%s:%s", toIp, port))
if err != nil { if err != nil {
log.Printf("Failed to resolve UDP address %s:%s: %v", toIp, port, err) log.Printf("Failed to resolve UDP address %s: %v", broadcastAddr, err)
return err return err
} }
@ -72,43 +66,85 @@ func SendToIP(message UdpMessage) error {
conn, err := net.ListenUDP("udp4", localAddr) conn, err := net.ListenUDP("udp4", localAddr)
if err != nil { if err != nil {
log.Printf("Failed to listen on UDP address %s: %v", toIp, err) log.Printf("Failed to listen on UDP address %s: %v", broadcastAddr, err)
return err return err
} }
defer conn.Close() defer conn.Close()
// 获取本地 IP 地址
localIP, err := GetLocalIP()
if err != nil {
log.Printf("Failed to get local IP address: %v", err)
return err
}
message.IP = localIP
data, err := json.Marshal(message) data, err := json.Marshal(message)
if err != nil { if err != nil {
log.Printf("Failed to marshal JSON for %s: %v", toIp, err) log.Printf("Failed to marshal JSON for %s: %v", broadcastAddr, err)
return err return err
} }
_, err = conn.WriteToUDP(data, addr) _, err = conn.WriteToUDP(data, addr)
if err != nil { if err != nil {
log.Printf("Failed to write to UDP address %s: %v", toIp, err) log.Printf("Failed to write to UDP address %s: %v", broadcastAddr, err)
return err return err
} }
log.Printf("发送 UDP 消息到 %s 成功", toIp) log.Printf("发送消息到 %s 成功", broadcastAddr)
return nil return nil
} }
// 获取 OnlineUsers 的最新状态 // ListenForBroadcast 监听多播消息
func GetOnlineUsers() map[string]UdpMessage { func ListenForBroadcast() {
return OnlineUsers broadcastAddr := GetBroadcastAddr()
addr, err := net.ResolveUDPAddr("udp4", broadcastAddr)
if err != nil {
log.Fatalf("Failed to resolve UDP address: %v", err)
}
// 使用 ListenMulticastUDP 创建多播连接
conn, err := net.ListenMulticastUDP("udp4", nil, addr)
if err != nil {
log.Fatalf("Failed to listen on UDP address: %v", err)
}
defer conn.Close()
// 获取本地 IP 地址
// localIP, err := libs.GetIPAddress()
// if err != nil {
// log.Printf("Failed to get local IP address: %v", err)
// }
// 开始监听多播消息
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
}
// if udpMsg.IP == localIP {
// continue
// }
// 从 remoteAddr 获取 IP 地址
ip := remoteAddr.IP.String()
if !contains(OnlineUsers, ip) {
OnlineUsers = append(OnlineUsers, UdpAddress{Hostname: udpMsg.Hostname, IP: ip})
log.Printf("在线用户: %v", OnlineUsers)
}
log.Printf("Received message from %s: %s", remoteAddr, udpMsg.Hostname)
}
} }
func GetLocalIP() (string, error) { func contains(slice []UdpAddress, element string) bool {
return libs.GetIPAddress() for _, v := range slice {
if v.IP == element {
return true
}
}
return false
}
func GetOnlineUsers() []UdpAddress {
return OnlineUsers
} }
func GetBroadcastPort() string { func GetBroadcastAddr() string {
addr := GetBroadcastAddr() return "224.0.0.251:20249"
return addr[strings.LastIndex(addr, ":")+1:]
} }

182
godo/localchat/windows.go

@ -1,106 +1,106 @@
//go:build windows // //go:build windows
// +build windows // // +build windows
package localchat package localchat
import ( // import (
"encoding/json" // "encoding/json"
"log" // "log"
"net" // "net"
) // )
func SendBroadcast(broadcastAddr string, message UdpMessage) error { // func SendBroadcast(broadcastAddr string, message UdpMessage) error {
addr, err := net.ResolveUDPAddr("udp4", broadcastAddr) // addr, err := net.ResolveUDPAddr("udp4", broadcastAddr)
if err != nil { // if err != nil {
log.Printf("Failed to resolve UDP address %s: %v", broadcastAddr, err) // log.Printf("Failed to resolve UDP address %s: %v", broadcastAddr, err)
return err // return err
} // }
// 使用本地地址进行连接 // // 使用本地地址进行连接
localAddr, err := net.ResolveUDPAddr("udp4", "0.0.0.0:0") // localAddr, err := net.ResolveUDPAddr("udp4", "0.0.0.0:0")
if err != nil { // if err != nil {
log.Printf("Failed to resolve local UDP address: %v", err) // log.Printf("Failed to resolve local UDP address: %v", err)
return err // return err
} // }
conn, err := net.ListenUDP("udp4", localAddr) // conn, err := net.ListenUDP("udp4", localAddr)
if err != nil { // if err != nil {
log.Printf("Failed to listen on UDP address %s: %v", broadcastAddr, err) // log.Printf("Failed to listen on UDP address %s: %v", broadcastAddr, err)
return err // return err
} // }
defer conn.Close() // defer conn.Close()
// 获取本地 IP 地址 // // 获取本地 IP 地址
localIP, err := GetLocalIP() // localIP, err := GetLocalIP()
log.Printf("本地 IP 地址: %s", localIP) // log.Printf("本地 IP 地址: %s", localIP)
if err != nil { // if err != nil {
log.Printf("Failed to get local IP address: %v", err) // log.Printf("Failed to get local IP address: %v", err)
return err // return err
} // }
message.IP = localIP // message.IP = localIP
data, err := json.Marshal(message) // data, err := json.Marshal(message)
if err != nil { // if err != nil {
log.Printf("Failed to marshal JSON for %s: %v", broadcastAddr, err) // log.Printf("Failed to marshal JSON for %s: %v", broadcastAddr, err)
return err // return err
} // }
_, err = conn.WriteToUDP(data, addr) // _, err = conn.WriteToUDP(data, addr)
if err != nil { // if err != nil {
log.Printf("Failed to write to UDP address %s: %v", broadcastAddr, err) // log.Printf("Failed to write to UDP address %s: %v", broadcastAddr, err)
return err // return err
} // }
log.Printf("发送消息到 %s 成功", broadcastAddr) // log.Printf("发送消息到 %s 成功", broadcastAddr)
return nil // return nil
} // }
// ListenForBroadcast 监听广播消息 // // ListenForBroadcast 监听广播消息
func ListenForBroadcast() { // func ListenForBroadcast() {
// 使用本地地址监听 // // 使用本地地址监听
localAddr, err := net.ResolveUDPAddr("udp4", ":20249") // localAddr, err := net.ResolveUDPAddr("udp4", ":20249")
if err != nil { // if err != nil {
log.Fatalf("Failed to resolve local UDP address: %v", err) // log.Fatalf("Failed to resolve local UDP address: %v", err)
} // }
conn, err := net.ListenUDP("udp4", localAddr) // conn, err := net.ListenUDP("udp4", localAddr)
if err != nil { // if err != nil {
log.Fatalf("Failed to listen on UDP address: %v", err) // log.Fatalf("Failed to listen on UDP address: %v", err)
} // }
defer conn.Close() // defer conn.Close()
// 获取本地 IP 地址 // // 获取本地 IP 地址
localIP, err := GetLocalIP() // localIP, err := GetLocalIP()
if err != nil { // if err != nil {
log.Printf("Failed to get local IP address: %v", err) // log.Printf("Failed to get local IP address: %v", err)
} // }
// 开始监听广播消息 // // 开始监听广播消息
buffer := make([]byte, 1024) // buffer := make([]byte, 1024)
for { // for {
n, remoteAddr, err := conn.ReadFromUDP(buffer) // n, remoteAddr, err := conn.ReadFromUDP(buffer)
if err != nil { // if err != nil {
log.Printf("Error reading from UDP: %v", err) // log.Printf("Error reading from UDP: %v", err)
continue // continue
} // }
var udpMsg UdpMessage // var udpMsg UdpMessage
err = json.Unmarshal(buffer[:n], &udpMsg) // err = json.Unmarshal(buffer[:n], &udpMsg)
if err != nil { // if err != nil {
log.Printf("Error unmarshalling JSON: %v", err) // log.Printf("Error unmarshalling JSON: %v", err)
continue // continue
} // }
if udpMsg.IP == localIP { // if udpMsg.IP == localIP {
continue // continue
} // }
OnlineUsers[udpMsg.IP] = udpMsg // OnlineUsers[udpMsg.IP] = udpMsg
if udpMsg.Type == "file" { // if udpMsg.Type == "file" {
RecieveFile(udpMsg) // RecieveFile(udpMsg)
} // }
log.Printf("Received message from %s: %s", remoteAddr, udpMsg.Hostname) // log.Printf("Received message from %s: %s", remoteAddr, udpMsg.Hostname)
} // }
} // }
func GetBroadcastAddr() string { // func GetBroadcastAddr() string {
//return libs.GetUdpAddr() // //return libs.GetUdpAddr()
return "255.255.255.255:20249" // return "255.255.255.255:20249"
} // }

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