[英]Swift - Get device's WIFI IP Address
我需要在 Swift 中获取 IP iOS 设备的地址。这不是关于此的其他问题的重复,我只需要获取 WiFi IP 地址。 如果没有 wifi ip 地址 - 我需要处理它,Stack Overflow 上有几个关于它的问题。 但只有返回 ip 地址的函数。 例如(来自How to get Ip address in swift ):
func getIFAddresses() -> [String] {
var addresses = [String]()
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs> = nil
if getifaddrs(&ifaddr) == 0 {
// For each interface ...
for (var ptr = ifaddr; ptr != nil; ptr = ptr.memory.ifa_next) {
let flags = Int32(ptr.memory.ifa_flags)
var addr = ptr.memory.ifa_addr.memory
// Check for running IPv4, IPv6 interfaces. Skip the loopback interface.
if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
// Convert interface address to a human readable string:
var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)
if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST) == 0) {
if let address = String.fromCString(hostname) {
addresses.append(address)
}
}
}
}
}
freeifaddrs(ifaddr)
}
return addresses
}
在这里我得到 2 个值 - 来自移动互联网的地址(我认为)和我需要的 WiFi 地址。 有没有其他方法可以只获取 WiFi IP 地址?
根据几个 SO 线程(例如, iOS 网络接口名称究竟是什么意思?pdp_ip 是什么?ap 是什么? ),iOS 设备上的 WiFi 接口始终具有名称“en0”。
您的代码(这似乎是我在How to get Ip address in swift 中回答的内容:)检索所有正在运行的网络接口的 IP 地址列表。 它可以很容易地修改为仅返回“en0”接口的 IP 地址,实际上这就是我最初在该线程上回答的内容(这只是对如何以编程方式获取 iphone 的 ip 地址的答案的 Swift 翻译):
// Return IP address of WiFi interface (en0) as a String, or `nil`
func getWiFiAddress() -> String? {
var address : String?
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs> = nil
if getifaddrs(&ifaddr) == 0 {
// For each interface ...
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr.memory.ifa_next }
let interface = ptr.memory
// Check for IPv4 or IPv6 interface:
let addrFamily = interface.ifa_addr.memory.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// Check interface name:
if let name = String.fromCString(interface.ifa_name) where name == "en0" {
// Convert interface address to a human readable string:
var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.memory.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String.fromCString(hostname)
}
}
}
freeifaddrs(ifaddr)
}
return address
}
用法:
if let addr = getWiFiAddress() {
print(addr)
} else {
print("No WiFi address")
}
Swift 3 的更新:除了采用Swift 3 中的许多更改的代码之外,迭代所有接口现在可以使用新的通用sequence()
函数:
不要忘了添加#include <ifaddrs.h>
在你的桥接报
// Return IP address of WiFi interface (en0) as a String, or `nil`
func getWiFiAddress() -> String? {
var address : String?
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0 else { return nil }
guard let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
// Check for IPv4 or IPv6 interface:
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// Check interface name:
let name = String(cString: interface.ifa_name)
if name == "en0" {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
对于那些来寻找不仅仅是 WIFI IP 的人,您可以稍微修改此代码
func getAddress(for network: Network) -> String? {
var address: String?
// Get list of all interfaces on the local machine:
var ifaddr: UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0 else { return nil }
guard let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
// Check for IPv4 or IPv6 interface:
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// Check interface name:
let name = String(cString: interface.ifa_name)
if name == network.rawValue {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
enum Network: String {
case wifi = "en0"
case cellular = "pdp_ip0"
//... case ipv4 = "ipv4"
//... case ipv6 = "ipv6"
}
然后我们也可以访问蜂窝 IP。
guard let wifiIp = getAddress(for: .wifi) else { return }
&
guard let cellularIp = getAddress(for: .cellular) else { return }
获取 wifi、有线和蜂窝的 IP 地址 - swift 5
func getIPAddress() -> String {
var address: String?
var ifaddr: UnsafeMutablePointer<ifaddrs>? = nil
if getifaddrs(&ifaddr) == 0 {
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr?.pointee.ifa_next }
guard let interface = ptr?.pointee else { return "" }
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// wifi = ["en0"]
// wired = ["en2", "en3", "en4"]
// cellular = ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
let name: String = String(cString: (interface.ifa_name))
if name == "en0" || name == "en2" || name == "en3" || name == "en4" || name == "pdp_ip0" || name == "pdp_ip1" || name == "pdp_ip2" || name == "pdp_ip3" {
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t((interface.ifa_addr.pointee.sa_len)), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
}
return address ?? ""
}
如何使用
let strIPAddress : String = self.getIPAddress()
print("IPAddress :: \(strIPAddress)")
注意:在您项目的 Bridging-Header 文件中添加以下内容
#include<ifaddrs.h>
创建桥接头并在其中包含#include <ifaddrs.h>
。
然后写这个方法
func getIFAddresses() -> [String] {
var addresses = [String]()
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs> = nil
if getifaddrs(&ifaddr) == 0 {
// For each interface ...
for (var ptr = ifaddr; ptr != nil; ptr = ptr.memory.ifa_next) {
let flags = Int32(ptr.memory.ifa_flags)
var addr = ptr.memory.ifa_addr.memory
// Check for running IPv4, IPv6 interfaces. Skip the loopback interface.
if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
// Convert interface address to a human readable string:
var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)
if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST) == 0) {
if let address = String.fromCString(hostname) {
addresses.append(address)
}
}
}
}
}
freeifaddrs(ifaddr)
}
return addresses
}
当我像var arr : NSArray = self.getIFAddresses()
一样在 viewController 中调用此方法时var arr : NSArray = self.getIFAddresses()
我在控制台中得到了完美的响应
IP :(“10.0.0.94”)
从这个数组你可以在任何你想要的地方访问它。 希望能帮助到你
Swift 4 - 获取设备的 IP 地址:
在桥接头中添加#include<ifaddrs.h>
。
这是获取 IP 地址所需的框架。
class func getIPAddress() -> String? {
var address: String?
var ifaddr: UnsafeMutablePointer<ifaddrs>? = nil
if getifaddrs(&ifaddr) == 0 {
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr?.pointee.ifa_next }
let interface = ptr?.pointee
let addrFamily = interface?.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
if let name: String = String(cString: (interface?.ifa_name)!), name == "en0" {
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface?.ifa_addr, socklen_t((interface?.ifa_addr.pointee.sa_len)!), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
}
return address
}
Swift 4.2 UIDevice
扩展,可避免强制解包并支持蜂窝和有线 IP 地址:
import UIKit
extension UIDevice {
private struct InterfaceNames {
static let wifi = ["en0"]
static let wired = ["en2", "en3", "en4"]
static let cellular = ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
static let supported = wifi + wired + cellular
}
func ipAddress() -> String? {
var ipAddress: String?
var ifaddr: UnsafeMutablePointer<ifaddrs>?
if getifaddrs(&ifaddr) == 0 {
var pointer = ifaddr
while pointer != nil {
defer { pointer = pointer?.pointee.ifa_next }
guard
let interface = pointer?.pointee,
interface.ifa_addr.pointee.sa_family == UInt8(AF_INET) || interface.ifa_addr.pointee.sa_family == UInt8(AF_INET6),
let interfaceName = interface.ifa_name,
let interfaceNameFormatted = String(cString: interfaceName, encoding: .utf8),
InterfaceNames.supported.contains(interfaceNameFormatted)
else { continue }
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr,
socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname,
socklen_t(hostname.count),
nil,
socklen_t(0),
NI_NUMERICHOST)
guard
let formattedIpAddress = String(cString: hostname, encoding: .utf8),
!formattedIpAddress.isEmpty
else { continue }
ipAddress = formattedIpAddress
break
}
freeifaddrs(ifaddr)
}
return ipAddress
}
}
用法:
UIDevice.current.ipAddress()
您可以使用以下代码获取 IP 地址:
注意:我使用了可达性,以便在 WiFi 更改为另一个时它会捕获新的 IP 地址。
在Podfile
文件中
pod 'ReachabilitySwift'
然后install pod
在AppDelegate.swift
文件中import ReachabilitySwift
注意:如果提示无法找到 ReachabilitySwift 模块的错误,则只需复制并粘贴即可。 有用!
didFinishLaunchingOptions
函数
NotificationCenter.default.addObserver(self, selector: #selector(self.reachabilityChanged), name: ReachabilityChangedNotification, object: reachability) do{ try reachability.startNotifier() } catch { print("could not start reachability notifier") }
然后将下面的代码复制粘贴到AppDelegate
文件中
func reachabilityChanged(note: NSNotification) { let reachability = note.object as! Reachability if reachability.isReachable { if reachability.isReachableViaWiFi { print("Reachable via WiFi") } else { print("Reachable via Cellular") } setIPAddress() } else { ipAddress = "" // No IP captures print("Network not reachable") } } func setIPAddress() { if let addr = self.getWiFiAddress() { print("ipAddress : \\(addr)") ipAddress = addr } else { ipAddress = "" // No IP captures print("No WiFi address") } } // Return IP address of WiFi interface (en0) as a String, or `nil` func getWiFiAddress() -> String? { var address : String? // Get list of all interfaces on the local machine: var ifaddr : UnsafeMutablePointer<ifaddrs>? guard getifaddrs(&ifaddr) == 0 else { return nil } guard let firstAddr = ifaddr else { return nil } // For each interface ... for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) { let interface = ifptr.pointee // Check for IPv4 or IPv6 interface: let addrFamily = interface.ifa_addr.pointee.sa_family if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) { // Check interface name: let name = String(cString: interface.ifa_name) if name == "en0" { // Convert interface address to a human readable string: var addr = interface.ifa_addr.pointee var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST)) getnameinfo(&addr, socklen_t(interface.ifa_addr.pointee.sa_len), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST) address = String(cString: hostname) } } } freeifaddrs(ifaddr) return address }
在 Bridging-Header 文件中添加这个#include<ifaddrs.h>
如果你没有这个文件,那么你可以创建它检查这个链接
6.
func applicationWillEnterForeground(_ application: UIApplication) {
// Post notification
NotificationCenter.default.post(name: ReachabilityChangedNotification, object: reachability)
// Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}
如果要删除观察者,则:
reachability.stopNotifier() NSNotificationCenter.defaultCenter().removeObserver(self,name: ReachabilityChangedNotification,object: reachability)
func getIPAddress() -> String {
var address: String = "error"
var interfaces: ifaddrs? = nil
var temp_addr: ifaddrs? = nil
var success: Int = 0
// retrieve the current interfaces - returns 0 on success
success = getifaddrs(interfaces)
if success == 0 {
// Loop through linked list of interfaces
temp_addr = interfaces
while temp_addr != nil {
if temp_addr?.ifa_addr?.sa_family == AF_INET {
// Check if interface is en0 which is the wifi connection on the iPhone
if (String(utf8String: temp_addr?.ifa_name) == "en0") {
// Get NSString from C String
address = String(utf8String: inet_ntoa((temp_addr?.ifa_addr as? sockaddr_in)?.sin_addr))
}
}
temp_addr = temp_addr?.ifa_next
}
}
// Free memory
freeifaddrs(interfaces)
return address
}
这里的所有答案仅提供 wifi 的 ip 地址,而不是有线或蜂窝网络。 以下代码段可用于 wifi/有线/蜂窝案例:
func getIPAddressForCellOrWireless()-> String? {
let WIFI_IF : [String] = ["en0"]
let KNOWN_WIRED_IFS : [String] = ["en2", "en3", "en4"]
let KNOWN_CELL_IFS : [String] = ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
var addresses : [String : String] = ["wireless":"",
"wired":"",
"cell":""]
var address: String?
var ifaddr: UnsafeMutablePointer<ifaddrs>? = nil
if getifaddrs(&ifaddr) == 0 {
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr?.pointee.ifa_next } // memory has been renamed to pointee in swift 3 so changed memory to pointee
let interface = ptr?.pointee
let addrFamily = interface?.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
if let name: String = String(cString: (interface?.ifa_name)!), (WIFI_IF.contains(name) || KNOWN_WIRED_IFS.contains(name) || KNOWN_CELL_IFS.contains(name)) {
// String.fromCString() is deprecated in Swift 3. So use the following code inorder to get the exact IP Address.
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface?.ifa_addr, socklen_t((interface?.ifa_addr.pointee.sa_len)!), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
if WIFI_IF.contains(name){
addresses["wireless"] = address
}else if KNOWN_WIRED_IFS.contains(name){
addresses["wired"] = address
}else if KNOWN_CELL_IFS.contains(name){
addresses["cell"] = address
}
}
}
}
}
freeifaddrs(ifaddr)
var ipAddressString : String?
let wirelessString = addresses["wireless"]
let wiredString = addresses["wired"]
let cellString = addresses["cell"]
if let wirelessString = wirelessString, wirelessString.count > 0{
ipAddressString = wirelessString
}else if let wiredString = wiredString, wiredString.count > 0{
ipAddressString = wiredString
}else if let cellString = cellString, cellString.count > 0{
ipAddressString = cellString
}
return ipAddressString
}
斯威夫特 5 清理
我更新了上面的答案以消除任何强制解包和一些 SwiftLint 清理。
class func getIPAddress() -> String? {
var address: String?
var ifaddr: UnsafeMutablePointer<ifaddrs>?
if getifaddrs(&ifaddr) == 0 {
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr?.pointee.ifa_next }
let interface = ptr?.pointee
let addrFamily = interface?.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6),
let cString = interface?.ifa_name,
String(cString: cString) == "en0",
let saLen = (interface?.ifa_addr.pointee.sa_len) {
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
let ifaAddr = interface?.ifa_addr
getnameinfo(ifaAddr,
socklen_t(saLen),
&hostname,
socklen_t(hostname.count),
nil,
socklen_t(0),
NI_NUMERICHOST)
address = String(cString: hostname)
}
}
freeifaddrs(ifaddr)
}
return address
}
另一种有点不同方法的解决方案是使用Ipify ,这是一个免费的轻量级服务,您可以 ping 以获取您的 IP
这是他们的 Swift 示例:
let url = URL(string: "https://api.ipify.org")
do {
if let url = url {
let ipAddress = try String(contentsOf: url)
print("My public IP address is: " + ipAddress)
}
} catch let error {
print(error)
}
如果您只想要 IPv4 响应作为输出,只需修改 Martin R 的解决方案。
func getWiFiAddress() -> String? {
var address : String?
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0 else { return nil }
guard let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
// Check for IPv4 or IPv6 interface:
let addrFamily = interface.ifa_addr.pointee.sa_family
//if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) { // **ipv6 committed
if addrFamily == UInt8(AF_INET){
// Check interface name:
let name = String(cString: interface.ifa_name)
if name == "en0" {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
用法:
if let addr = getWiFiAddress() {
print(addr)
} else {
print("No WiFi address")
}
支持 IPV4 和 IPV6
使其成为 UIDevice 的扩展并使用 UIDevice.current.getIPAdress() 调用
private struct Interfaces {
// INTERFACCIE SUPPORT
static let wifi = ["en0"]
static let cellular = ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
static let supported = wifi + cellular
}
func getIPAdress() -> (String?,String?)? {
var ip4Adress: String?
var ip6Adress: String?
var hasAdress: UnsafeMutablePointer<ifaddrs>?
if getifaddrs(&hasAdress) == 0 {
var pointer = hasAdress
while pointer != nil {
defer { pointer = pointer?.pointee.ifa_next}
guard let interface = pointer?.pointee else {continue}
// SEARCH FOR IPV4 OR IPV6 IN THE INTERFACE OF THE NODE
// HERE I'M ALREADY LOOSING MY MIND
// PRIORITY FOR IPV4 THAN IPV6
if interface.ifa_addr.pointee.sa_family == UInt8(AF_INET) {
guard let ip4 = processInterface(interface: interface) else {
continue
}
ip4Adress = ip4
}
if interface.ifa_addr.pointee.sa_family == UInt8(AF_INET6) {
guard let ip6 = processInterface(interface: interface) else {
continue
}
ip6Adress = ip6
}
}
freeifaddrs(hasAdress)
}
return (ip4Adress, ip6Adress)
}
func processInterface(interface: ifaddrs) -> String? {
var ipAdress: String = ""
guard
let interfaceName = interface.ifa_name else {return nil}
guard
let interfaceNameFormatted = String(cString: interfaceName, encoding: .utf8) else {return nil}
guard Interfaces.supported.contains(interfaceNameFormatted) else {return nil}
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
print(interfaceNameFormatted)
// CONVERT THE SOCKET ADRESS TO A CORRESPONDING HOST AND SERVICE
getnameinfo(interface.ifa_addr,
socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil,
socklen_t(0),
NI_NUMERICHOST)
guard let formattedIpAdress = String(cString: hostname, encoding: .utf8) else {return nil}
if !formattedIpAdress.isEmpty {
ipAdress = formattedIpAdress
}
return ipAdress
}
此类使用 NWPathMonitor 监视设备接口。 您可以设置一个更新处理程序,通知您有关接口状态更改的信息。 选择是否要跟踪 ipv4 或 ipv6 并检查 status.interfaceType == .wifi 以查看您的活动接口是否为 wifi
用法:
let monitor = IPMonitor(ipType: .ipv4)
monitor.pathUpdateHandler = { status in
print("\(status.debugDescription)")
}
班级:
import Foundation
import Network
class IPMonitor {
enum InterfaceType: String {
case cellular = "cellular"
case wifi = "wifi"
case wired = "wired"
case loopback = "loopback"
case other = "other"
case notFound = "not found"
}
enum IPType: String {
case ipv4 = "IPv4"
case ipv6 = "ipV6"
case unknown = "unknown"
}
struct Status {
var name = "unknown"
var interfaceType: InterfaceType = InterfaceType.notFound
var ip: [String] = []
var ipType: IPType = IPType.unknown
var debugDescription: String {
let result = "Interface: \(name)/\(interfaceType.rawValue), \(ipType.rawValue)\(ip.debugDescription)"
return result
}
}
private let monitor = NWPathMonitor()
private let queue = DispatchQueue(label: "ip_monitor_queue")
final var pathUpdateHandler: ((Status) -> Void)?
init(ipType: IPType) {
monitor.pathUpdateHandler = { path in
let name = self.getInterfaceName(path: path)
let type = self.getInterfaceType(path: path)
let ip = self.getIPAddresses(interfaceName: name, ipType: ipType)
let status = Status(name: name, interfaceType: type, ip: ip, ipType: ipType)
//print("\(status)")
self.pathUpdateHandler?(status)
}
monitor.start(queue: queue)
}
private func getInterfaceName(path: NWPath) -> String {
if let name = path.availableInterfaces.first?.name {
return name
}
return "unknown"
}
private func getInterfaceType(path: NWPath) -> InterfaceType {
if let type = path.availableInterfaces.first?.type {
switch type {
case NWInterface.InterfaceType.cellular:
return InterfaceType.cellular
case NWInterface.InterfaceType.wifi:
return InterfaceType.wifi
case NWInterface.InterfaceType.wiredEthernet:
return InterfaceType.wired
case NWInterface.InterfaceType.loopback:
return InterfaceType.loopback
default:
return InterfaceType.other
}
}
return InterfaceType.notFound
}
private func getIPAddresses(interfaceName: String, ipType: IPType)-> [String]{
var addresses: [String] = []
var ifaddr: UnsafeMutablePointer<ifaddrs>? = nil
if getifaddrs(&ifaddr) == 0 {
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr?.pointee.ifa_next }
let interface = ptr?.pointee
let addrFamily = interface?.ifa_addr.pointee.sa_family
if (addrFamily == UInt8(AF_INET) && ipType == .ipv4)
|| (addrFamily == UInt8(AF_INET6) && ipType == .ipv6) {
let name = String(cString: (interface?.ifa_name)!)
if name == interfaceName {
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface?.ifa_addr, socklen_t((interface?.ifa_addr.pointee.sa_len)!), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST)
addresses.append(String(cString: hostname))
}
}
}
}
freeifaddrs(ifaddr)
return addresses
}
}
对于 Mac 上的 Swift - Swift 4:通过这种方式,您还可以从 Wifi(不仅是以太网)中找出 IP
func getWiFiAddress() -> String? {
var address : String?
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0 else { return nil }
guard let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
// Check for IPv4 or IPv6 interface:
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// Check interface name:
let name = String(cString: interface.ifa_name)
if name == "en0" {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
} else if name == "en1" {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(1), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
基于上述一些答案的NWInterface.InterfaceType
扩展:
import Network
extension NWInterface.InterfaceType {
var names : [String]? {
switch self {
case .wifi: return ["en0"]
case .wiredEthernet: return ["en2", "en3", "en4"]
case .cellular: return ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
default: return nil
}
}
func address(family: Int32) -> String?
{
guard let names = names else { return nil }
var address : String?
for name in names {
guard let nameAddress = self.address(family: family, name: name) else { continue }
address = nameAddress
break
}
return address
}
func address(family: Int32, name: String) -> String? {
var address: String?
// Get list of all interfaces on the local machine:
var ifaddr: UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0, let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(family)
{
// Check interface name:
if name == String(cString: interface.ifa_name) {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
var ipv4 : String? { self.address(family: AF_INET) }
var ipv6 : String? { self.address(family: AF_INET6) }
}
用法:
对于蜂窝的 ipv4: NWInterface.InterfaceType.cellular.ipv4
enum Network: String {
case wifi = "en0"
case cellular = "pdp_ip0"
// case en1 = "en1"
// case lo = "lo0"
}
// get ipv4 or ipv6 address
extension UIDevice {
func address(family: Int32, for network: Network) -> String? {
var address: String?
// Get list of all interfaces on the local machine:
var ifaddr: UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0, let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(family) {
// Check interface name:
let name = String(cString: interface.ifa_name)
if name == network.rawValue {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
func ipv4(for network: Network) -> String? {
self.address(family: AF_INET, for: network)
}
func ipv6(for network: Network) -> String? {
self.address(family: AF_INET6, for: network)
}
// get all addresses
func getIFAddresses() -> [String] {
var addresses = [String]()
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0 else { return [] }
guard let firstAddr = ifaddr else { return [] }
// For each interface ...
for ptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let flags = Int32(ptr.pointee.ifa_flags)
let addr = ptr.pointee.ifa_addr.pointee
// Check for running IPv4, IPv6 interfaces. Skip the loopback interface.
if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
if (getnameinfo(ptr.pointee.ifa_addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST) == 0) {
let address = String(cString: hostname)
addresses.append(address)
}
}
}
}
freeifaddrs(ifaddr)
return addresses
}
}
如何使用
// for wifi
let wifi = UIDevice.current.ipv4(for: .wifi) # ipv4
let wifi6 = UIDevice.current.ipv6(for: .wifi) # ipv6
// for cellular
let cellular = UIDevice.current.ipv4(for: .cellular) # ipv4
let cellular6 = UIDevice.current.ipv6(for: .cellular) # ipv6
鉴于您已经拥有套接字的文件描述符,这是 Swift 5.2 的解决方案。
// Depending on your case get the socket's file descriptor
// the way you want
let socketFd = foo()
// Get the remote address for that file descriptor
var addr: sockaddr_storage = sockaddr_storage()
var addr_len: socklen_t = socklen_t(MemoryLayout.size(ofValue: addr))
var hostBuffer = [CChar](repeating: 0, count: Int(NI_MAXHOST))
// Make local copy to avoid: "Overlapping accesses to 'addr',
// but modification requires exclusive access; consider copying
// to a local variable"
let addrLen = addr.ss_len
withUnsafeMutablePointer(to: &addr) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
if getpeername(socketFd, $0, &addr_len) != 0 { return }
getnameinfo($0, socklen_t(addrLen), &hostBuffer, socklen_t(hostBuffer.count), nil, 0, NI_NUMERICHOST)
}
}
let connectedHost = String(cString: hostBuffer, encoding: .utf8)
enum Network: String {
case wifi = "en0"
case cellular = "pdp_ip0"
case hotspot = "bridge100"
}
如果使用热点获取 ip
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