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95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
//go:build freebsd
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// +build freebsd
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package ipv6
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import (
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"fmt"
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"os"
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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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// FreeBSD 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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// FreeBSD平台专用的配置文件获取方法
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func getPrefixFromConfigFiles() (string, error) {
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configFiles := []string{
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"/etc/rc.conf",
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"/etc/rc.conf.local",
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}
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for _, file := range configFiles {
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if _, err := os.Stat(file); err == nil {
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content, err := os.ReadFile(file)
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if err != nil {
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continue
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}
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re := regexp.MustCompile(`(?i)ipv6_prefix(len)?="?(\d+)"?`)
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matches := re.FindStringSubmatch(string(content))
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if len(matches) >= 3 {
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prefixLen := matches[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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continue
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}
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return prefixLen, nil
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}
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}
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}
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return "", fmt.Errorf("在配置文件中未找到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：从配置文件获取前缀长度
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prefixLen, err = getPrefixFromConfigFiles()
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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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