golang 编写一个sip呼叫测试工具支持媒体测试-Go服务器开发

下面是一个简单的 Go 语言编写的 SIP 呼叫测试工具，支持媒体测试：

”`go package main

import (

"fmt"
"os/exec"
"time"

"github.com/gortc/sdp"

)

func main() {

// 设置参数
target := "sip:target@domain.com"
from := "sip:from@domain.com"
username := "username"
password := "password"
audioFile := "/path/to/audio/file.wav"

// 创建 SDP
session := &sdp.Session{
    Time: sdp.Time{
        Start: time.Now(),
        End:   time.Now().Add(time.Hour),
    },
    Origin: sdp.Origin{
        Username:       username,
        SessionID:      0,
        SessionVersion: 0,
        NetworkType:    "IN",
        AddressType:    "IP4",
        UnicastAddress: "",
    },
    Name:     "-",
    Info:     "",
    URI:      "",
    Email:    "",
    PhoneNum: "",
    ConnectionData: &sdp.ConnectionData{
        NetworkType: "IN",
        AddressType: "IP4",
        Address:     "",
    },
    Bandwidths: []sdp.Bandwidth{},
    TimeZones:  []sdp.TimeZone{},
    AttributesMapWithFields(sdp.AttributeFieldMediaDescriptions): []string{
        fmt.Sprintf("m=audio %d RTP/AVP 0", getFreePort()),
        fmt.Sprintf("a=rtpmap:%d PCMU/8000", 0),
        fmt.Sprintf("a=sendrecv"),
    },
}

// 将 SDP 编码为字符串
s, err := session.Marshal()
if err != nil {
	fmt.Println("Error encoding SDP:", err)
	return
}

// 构建命令行参数
args := []string{
    "-u", username,
    "-w", password,
    "-f", from,
    "-t", target,
    "--sdp", string(s),
}

// 执行呼叫
cmd := exec.Command("linphonecsh", args...)
if err := cmd.Run(); err != nil {
    fmt.Println("Error making call:", err)
    return
}

// 等待媒体测试完成
time.Sleep(5 * time.Second)

// 播放音频文件进行测试
cmd = exec.Command("play", audioFile)
if err := cmd.Run(); err != nil {
	fmt.Println("Error playing audio file:", err)
	return
}

}

// 获取一个空闲的端口号（用于 SDP 中） func getFreePort() int