I am doing a reverse DNS in Swift, my previous code on Swift 2.2 was working fine, also I have implemented it in Objective-C and it works to. However I am not able to make it works in Swift 3.0
Swift 2.2
//: Let's set up the `sockaddr_in` C structure using the initializer.
var sin = sockaddr_in(
sin_len: UInt8(sizeof(sockaddr_in)),
sin_family: sa_family_t(AF_INET),
sin_port: in_port_t(0),
sin_addr: in_addr(s_addr: inet_addr(ip)),
sin_zero: (0,0,0,0,0,0,0,0)
)
//: Now convert the structure into a `CFData` object.
let data = withUnsafePointer(&sin) { ptr in
CFDataCreate(kCFAllocatorDefault, UnsafePointer(ptr), sizeof(sockaddr_in))
}
//: Create the `CFHostRef` with the `CFData` object and store the retained value for later use.
let host = CFHostCreateWithAddress(kCFAllocatorDefault, data).takeRetainedValue()
//: Now schedule the runloop for the host.
CFHostScheduleWithRunLoop(host!, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode)
var error = CFStreamError()
//: Start the info resolution.
CFHostStartInfoResolution(host!, .Names, &error)
Swift 3.0
//: Let's set up the `sockaddr_in` C structure using the initializer.
var sin = sockaddr_in(
sin_len: UInt8(sizeof(sockaddr_in)),
sin_family: sa_family_t(AF_INET),
sin_port: in_port_t(0),
sin_addr: in_addr(s_addr: inet_addr(ip)),
sin_zero: (0,0,0,0,0,0,0,0)
)
//: Now convert the structure into a `CFData` object.
let data = NSData(bytes: &sin, length: MemoryLayout<sockaddr_in>.size) as CFData
//: Create the `CFHostRef` with the `CFData` object and store the retained value for later use.
let host = CFHostCreateWithAddress(kCFAllocatorDefault, data).takeRetainedValue()
//: Now schedule the runloop for the host.
CFHostScheduleWithRunLoop(host!, CFRunLoopGetCurrent(), CFRunLoopMode.defaultMode as! CFString)
var error = CFStreamError()
//: Start the info resolution.
CFHostStartInfoResolution(host!, .Names, &error)
When I ran this code it it crash at
CFHostScheduleWithRunLoop
any idea?
