在 Go 中使用 net.DialTCP 指定本地 IP 地址

package main

import (
    "fmt"
    "net"
)

func main() {
    var localaddr net.TCPAddr
    var remoteaddr net.TCPAddr
    localaddr.IP = net.ParseIP("192.168.1.104")
    localaddr.Port = 6000
    remoteaddr.IP = net.ParseIP("192.168.1.104")
    remoteaddr.Port = 5000

    if localaddr.IP == nil || remoteaddr.IP == nil {
        fmt.Println("error")
    }

    if _, err := net.DialTCP("tcp", &localaddr, &remoteaddr); err != nil {
        fmt.Println(err)
    }

    fmt.Println("End")
}

package main

import (
    "fmt"
    "net"
)

func main() {
    remoteaddr, err := net.ResolveTCPAddr("tcp", "192.168.1.104:5000")
    if err != nil {
        fmt.Println("ResolveTCPAddr error:", err)
        return
    }

    // 如果需要指定本地地址和端口，可以创建一个 TCPAddr 结构体
    localaddr, err := net.ResolveTCPAddr("tcp", "192.168.1.104:6000")
    if err != nil {
        fmt.Println("ResolveTCPAddr error:", err)
        return
    }

    conn, err := net.DialTCP("tcp", localaddr, remoteaddr)
    if err != nil {
        fmt.Println("DialTCP error:", err)
        return
    }
    defer conn.Close()

    fmt.Println("Connected to:", conn.RemoteAddr())
}