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105 lines
3.1 KiB
Go
105 lines
3.1 KiB
Go
//go:build darwin
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// +build darwin
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package ipv6
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import (
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"fmt"
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"os/exec"
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"regexp"
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"strconv"
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"strings"
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)
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// macOS上获取前缀长度
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func getPrefixFromIfconfig(interfaceName string) (string, error) {
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cmd := exec.Command("ifconfig", interfaceName)
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output, err := cmd.Output()
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if err != nil {
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return "", err
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}
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re := regexp.MustCompile(`inet6\s+([a-fA-F0-9:]+)%?\w*\s+prefixlen\s+(\d+)`)
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matches := re.FindAllStringSubmatch(string(output), -1)
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for _, match := range matches {
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if len(match) < 3 {
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continue
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}
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ipv6Addr := match[1]
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prefixLen := match[2]
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if strings.HasPrefix(ipv6Addr, "fe80") || // 链路本地地址
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strings.HasPrefix(ipv6Addr, "::1") || // 回环地址
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strings.HasPrefix(ipv6Addr, "fc") || // 本地唯一地址
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strings.HasPrefix(ipv6Addr, "fd") || // 本地唯一地址
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strings.HasPrefix(ipv6Addr, "ff") { // 组播地址
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continue
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}
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prefixLenInt, err := strconv.Atoi(prefixLen)
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if err != nil || prefixLenInt < 0 || prefixLenInt > 128 {
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continue
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}
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return prefixLen, nil
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}
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return "", fmt.Errorf("未找到全局IPv6地址")
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}
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// macOS平台上使用networksetup命令获取更多信息
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func getPrefixFromNetworksetup(interfaceName string) (string, error) {
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cmd := exec.Command("networksetup", "-listallhardwareports")
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output, err := cmd.Output()
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if err != nil {
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return "", err
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}
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lines := strings.Split(string(output), "\n")
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var serviceName string
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for i := 0; i < len(lines); i++ {
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if strings.Contains(lines[i], "Device: "+interfaceName) && i > 0 {
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serviceNameLine := lines[i-1]
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if strings.HasPrefix(serviceNameLine, "Hardware Port: ") {
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serviceName = strings.TrimPrefix(serviceNameLine, "Hardware Port: ")
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break
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}
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}
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}
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if serviceName == "" {
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return "", fmt.Errorf("未找到网络接口对应的服务名称")
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}
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cmd = exec.Command("networksetup", "-getinfo", serviceName)
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output, err = cmd.Output()
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if err != nil {
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return "", err
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}
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re := regexp.MustCompile(`IPv6:\s*Automatic\s*\nIPv6\s*Address:\s*([a-fA-F0-9:]+)\s*\nIPv6\s*Prefix\s*Length:\s*(\d+)`)
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match := re.FindStringSubmatch(string(output))
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if len(match) >= 3 {
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prefixLen := match[2]
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prefixLenInt, err := strconv.Atoi(prefixLen)
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if err != nil || prefixLenInt < 0 || prefixLenInt > 128 {
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return "", fmt.Errorf("无效的IPv6前缀长度: %s", prefixLen)
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}
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return prefixLen, nil
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}
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return "", fmt.Errorf("未找到IPv6前缀长度信息")
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}
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// 获取 IPv6 子网掩码
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func GetIPv6Mask(publicIPv6, language string) (string, error) {
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if publicIPv6 == "" {
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return "", fmt.Errorf("无公网IPV6地址")
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}
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interfaceName, err := getInterface()
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if err != nil || interfaceName == "" {
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return "", fmt.Errorf("获取网络接口失败: %v", err)
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}
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// 方法1：从ifconfig获取前缀长度
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prefixLen, err := getPrefixFromIfconfig(interfaceName)
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if err == nil && prefixLen != "" {
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return formatIPv6Mask(prefixLen, language), nil
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}
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// 方法2：从networksetup获取前缀长度
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prefixLen, err = getPrefixFromNetworksetup(interfaceName)
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if err == nil && prefixLen != "" {
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return formatIPv6Mask(prefixLen, language), nil
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}
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return formatIPv6Mask("128", language), nil
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}
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