141 lines
4.6 KiB
Swift
141 lines
4.6 KiB
Swift
//
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// NetworkInterface.swift
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// punchnet
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//
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// Created by 安礼成 on 2025/8/3.
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//
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//
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// NetworkInterface.swift
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// Tun
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//
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// Created by 安礼成 on 2024/1/19.
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//
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import Foundation
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import Network
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public struct NetworkInterface {
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public let name: String
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public let ip: String
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public let netmask: String
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}
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public struct NetworkInterfaceManager {
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/**
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获取网卡信息, (let name: String let ip: String let netmask: String)
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*/
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public static func getInterfaces() -> [NetworkInterface] {
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var interfaces: [NetworkInterface] = []
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// Get list of all interfaces on the local machine:
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var ifaddr : UnsafeMutablePointer<ifaddrs>? = nil
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if getifaddrs(&ifaddr) == 0 {
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// For each interface ...
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var ptr = ifaddr
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while( ptr != nil) {
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let flags = Int32(ptr!.pointee.ifa_flags)
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var addr = ptr!.pointee.ifa_addr.pointee
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// Check for running IPv4, IPv6 interfaces. Skip the loopback interface.
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if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
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if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
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var mask = ptr!.pointee.ifa_netmask.pointee
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// Convert interface address to a human readable string:
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let zero = CChar(0)
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var hostname = [CChar](repeating: zero, count: Int(NI_MAXHOST))
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var netmask = [CChar](repeating: zero, count: Int(NI_MAXHOST))
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if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),
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nil, socklen_t(0), NI_NUMERICHOST) == 0) {
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let address = String(cString: hostname)
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let name = ptr!.pointee.ifa_name!
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let ifname = String(cString: name)
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if (getnameinfo(&mask, socklen_t(mask.sa_len), &netmask, socklen_t(netmask.count), nil, socklen_t(0), NI_NUMERICHOST) == 0) {
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let netmaskIP = String(cString: netmask)
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interfaces.append(NetworkInterface(name: ifname, ip: address, netmask: netmaskIP))
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}
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}
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}
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}
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ptr = ptr!.pointee.ifa_next
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}
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freeifaddrs(ifaddr)
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}
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return interfaces
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}
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// 获取本地网卡中的公网IPv6地址
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public static func getPublicIPv6Address() -> String? {
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return self.getPublicIPv6Interface()?.ip
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}
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// 获取本地网卡中的公网IPv6网卡
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public static func getPublicIPv6Interface() -> NetworkInterface? {
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let interfaces = self.getInterfaces()
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return interfaces.first { interface in
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!interface.name.hasPrefix("utun")
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&& self.isPublicIPv6(interface.ip)
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}
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}
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/// 判断一个 IPv6 字符串是否是公网 IPv6
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public static func isPublicIPv6(_ ipString: String) -> Bool {
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let normalizedIp = String(ipString.split(separator: "%", maxSplits: 1, omittingEmptySubsequences: false).first ?? "")
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guard let ipv6 = IPv6Address(normalizedIp) else {
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return false
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}
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return self.isPublicIPv6(ipv6.rawValue)
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}
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/// 判断 16 字节 IPv6 地址是否是公网 IPv6
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public static func isPublicIPv6(_ raw: Data) -> Bool {
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guard raw.count == 16 else {
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return false
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}
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let bytes = [UInt8](raw)
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// 1. 排除 unspecified ::
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if bytes.allSatisfy({ $0 == 0 }) {
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return false
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}
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// 2. 排除 loopback ::1
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if bytes.dropLast().allSatisfy({ $0 == 0 }) && bytes[15] == 1 {
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return false
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}
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// 3. 排除 multicast ff00::/8
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if bytes[0] == 0xFF {
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return false
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}
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// 4. 排除 link-local fe80::/10
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// 即首字节 0xFE，第二字节前两位是 10（二进制）
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if bytes[0] == 0xFE && (bytes[1] & 0xC0) == 0x80 {
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return false
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}
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// 5. 排除 ULA fc00::/7
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// 即首字节前 7 位是 1111110
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if (bytes[0] & 0xFE) == 0xFC {
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return false
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}
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// 6. 判断是否属于 2000::/3
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// 即首字节前 3 位是 001
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return (bytes[0] & 0xE0) == 0x20
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}
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}
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