管理ifaddrs以及在Swift中返回MAC地址

概述我有以下代码成功检索连接到我的路由器的所有IP.但我需要为每个IP获取MAC地址. 因此,不是将地址作为带有[ips]的数组返回,而是作为字典返回[ips：0000000,mac：000000] 是否可以通过更改以下代码(从How to get Ip address in swift开始)来实现？ func getIFAddresses() -> [String] {print("GET I 我有以下代码成功检索连接到我的路由器的所有IP.但我需要为每个IP获取MAC地址.

因此,不是将地址作为带有[ips]的数组返回,而是作为字典返回[ips：0000000,mac：000000]

是否可以通过更改以下代码(从How to get Ip address in swift开始)来实现？

func getIFAddresses() -> [String] {print("GET IF ADDRESSSE")var addresses = [String]()// Get List of all interfaces on the local machine:var ifaddr : UnsafeMutablePointer<ifaddrs> = nilif getifaddrs(&ifaddr) == 0 {    print("getifaddrs\(getifaddrs)")    // 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        print("flags\(flags)")        print("addr\(addr)")        // 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) {                print("addr.sa_family\(addr.sa_family)")                // Convert interface address to a human readable string:                var hostname = [CChar](count: Int(NI_MAXHOST),repeatedValue: 0)                print("hostname\(hostname)")                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)    print("freeifaddrs\(freeifaddrs)")}print("ADDRESSES \(addresses)")return addresses

}

解决方法 (备注/澄清：这是对“管理ifaddrs以及在Swift中返回MAC地址”和“是否有可能从 How to get Ip address in swift修改代码以返回MAC地址”的问题的答案).
这不是“检索连接到我的路由器的所有IP”的解决方案
问题正文中也提到了这一点.)

这是返回的引用代码的扩展
本地(up和running)接口为
一个(接口名称,IP地址,MAC地址)元组的数组.
从AF_link类型的接口检索MAC地址
它们在接口列表中存储为sockaddr_dl结构.
这是一个可变长度的结构,Swift的严格类型系统使一些指针杂乱成为必要.

重要提示：此代码适用于在Mac计算机上运行.
它无法在iOS设备上获取MAC地址.
iOS有意将“02：00：00：00：00：00”作为硬件地址返回
出于隐私原因,请参阅所有接口,例如
Trouble with MAC address in iOS 7.0.2.)

func getInterfaces() -> [(name : String,addr: String,mac : String)] {    var addresses = [(name : String,mac : String)]()    var nameToMac = [ String : 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 flags = Int32(ptr.memory.ifa_flags)            let addr = ptr.memory.ifa_addr            if let name = String.fromCString(ptr.memory.ifa_name)  {                // Check for running IPv4,IPv6 interfaces. Skip the loopback interface.                if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {                    if addr.memory.sa_family == UInt8(AF_link) {                        // Get MAC address from sockaddr_dl structure and store in nameToMac dictionary:                        let dl = UnsafePointer<sockaddr_dl>(ptr.memory.ifa_addr)                        let lladdr = UnsafeBufferPointer(start: UnsafePointer<Int8>(dl) + 8 + Int(dl.memory.sdl_nlen),count: Int(dl.memory.sdl_alen))                        if lladdr.count == 6 {                            nameToMac[name] = lladdr.map { String(format:"%02hhx",
#include <ifaddrs.h>#include <net/if_dl.h>
)}.joinWithSeparator(":")                        }                    }                    if addr.memory.sa_family == UInt8(AF_INET) || addr.memory.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.memory.sa_len),NI_NUMERICHOST) == 0) {                            if let address = String.fromCString(hostname) {                                addresses.append( (name: name,addr: address,mac : "") )                            }                        }                    }                }            }        }        freeifaddrs(ifaddr)    }    // Now add the mac address to the tuples:    for (i,addr) in addresses.enumerate() {        if let mac = nameToMac[addr.name] {            addresses[i] = (name: addr.name,addr: addr.addr,mac : mac)        }    }    return addresses}

你必须添加

for addr in getInterfaces() {   print(addr)}// ("en0","fe80::1234:7fff:fe2e:8765%en0","a9:55:6f:2e:57:78")// ("en0","192.168.2.108","a9:55:6f:2e:57:78")// ...

到桥接头文件进行编译.

用法示例：

func getInterfaces() -> [(name : String,mac : String)]()    var nameToMac = [ String: 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: { .pointee.ifa_next }) {        let flags = Int32(ptr.pointee.ifa_flags)        if let addr = ptr.pointee.ifa_addr {            let name = String(cString: ptr.pointee.ifa_name)            // Check for running IPv4,IPv6 interfaces. Skip the loopback interface.            if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {                switch Int32(addr.pointee.sa_family) {                case AF_link:                    // Get MAC address from sockaddr_dl structure and store in nameToMac dictionary:                    addr.withMemoryRebound(to: sockaddr_dl.self,capacity: 1) { dl in                        dl.withMemoryRebound(to: Int8.self,capacity: 8 + Int(dl.pointee.sdl_nlen + dl.pointee.sdl_alen)) {                            let lladdr = UnsafeBufferPointer(start:  + 8 + Int(dl.pointee.sdl_nlen),count: Int(dl.pointee.sdl_alen))                            if lladdr.count == 6 {                                nameToMac[name] = lladdr.map { String(format:"%02hhx",)}.joined(separator: ":")                            }                        }                    }                case AF_INET,AF_INET6:                    // Convert interface address to a human readable string:                    var hostname = [CChar](repeating: 0,count: Int(NI_MAXHOST))                    if (getnameinfo(addr,socklen_t(addr.pointee.sa_len),NI_NUMERICHOST) == 0) {                        let address = String(cString: hostname)                        addresses.append( (name: name,mac : "") )                    }                default:                    break                }            }        }    }    freeifaddrs(ifaddr)    // Now add the mac address to the tuples:    for (i,addr) in addresses.enumerated() {        if let mac = nameToMac[addr.name] {            addresses[i] = (name: addr.name,mac : mac)        }    }    return addresses}

更新Swift 3(Xcode 8)：

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