swift - 如何使用快速将字符串转换为 ipv6 地址

Question

我有一个 ipv6 字符串，如何使用 Swift 转换为 in6_addr

let ipString = "2001:0b28:f23f:f005:0000:0000:0000:000a"

Answer 1

您可以使用 inet_pton()与在 C 程序中类似:

let ipString = "2001:0b28:f23f:f005:0000:0000:0000:000a"
var addr = in6_addr()
let retval = withUnsafeMutablePointer(&addr) {
    inet_pton(AF_INET6, ipString, UnsafeMutablePointer($0))    
}

if retval == 0 {
    print("Invalid address")
} else if retval == -1 {
    print("Failed:", String.fromCString(strerror(errno)) ?? "\(errno)")
    // For Swift 3, replace the last line by
    // print("Failed:", String(cString: strerror(errno)))
} else {
  //  Success, `addr` contains the result.
}

withUnsafeMutablePointer() 是传递地址所必需的addr 变量到 inet_pton()。