在Swift中也管理ifaddrs以返回MAC地址
我有以下代码可以成功检索连接到路由器的所有IP。但是我需要获取每个IP的MAC地址。
因此[ips]，与其将地址作为数组返回，而不是将其作为字典返回[ips:0000000, mac: 000000]
是否可以通过更改以下代码来实现从如何快速获取Ip地址？
func getIFAddresses() -> [String] {print("GET IF ADDRESSSE")
var addresses = [String]()
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs> = nil
if 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
}
回答：
（ 备注/说明： 这是对 “管理ifaddrs在Swift中也返回MAC地址” 和 “是否可以修改
如何快速获取Ip地址中的代码以也返回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该解决方案。）
这是参考代码的扩展，该代码以 （接口名称，ip地址，MAC地址） 元组的数组形式返回本地（正在运行的接口 ）
。从类型的接口检索MAC地址，这些接口AF_LINK
作为sockaddr_dl结构存储在接口列表中。这是一个可变长度的结构，Swift的严格类型系统使指针变乱成为必要。
该代码旨在在Mac计算机上运行。在iOS设备上获取MAC地址不起作用。为了保护隐私，iOS 故意 为所有接口的硬件地址返回“02：00：00：00：00：00”作为硬件地址，
func getInterfaces() -> [(name : String, addr: String, mac : String)] { var addresses = [(name : String, addr: 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", $0)}.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), &hostname, socklen_t(hostname.count),
nil, socklen_t(0), 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
}
您必须添加
#include <ifaddrs.h>#include <net/if_dl.h>
到桥接头文件进行编译。
用法示例：
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")
// ...
func getInterfaces() -> [(name : String, addr: String, mac : String)] { var addresses = [(name : String, addr: 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: { $0.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: $0 + 8 + Int(dl.pointee.sdl_nlen),
count: Int(dl.pointee.sdl_alen))
if lladdr.count == 6 {
nameToMac[name] = lladdr.map { String(format:"%02hhx", $0)}.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),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST) == 0) {
let address = String(cString: hostname)
addresses.append( (name: name, addr: address, 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, addr: addr.addr, mac : mac)
}
}
return addresses
}
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