forked from I2P_Developers/i2p.i2p
51 lines
1.7 KiB
Swift
51 lines
1.7 KiB
Swift
//
|
|
// NetworkUtil.swift
|
|
// I2PLauncher
|
|
//
|
|
// Created by Mikal Villa on 07/04/2019.
|
|
// Copyright © 2019 The I2P Project. All rights reserved.
|
|
//
|
|
|
|
import Foundation
|
|
|
|
class NetworkUtil {
|
|
static func checkTcpPortForListen(host: String = "127.0.0.1", port: in_port_t = 7657) -> (Bool, descr: String){
|
|
|
|
let socketFileDescriptor = socket(AF_INET, SOCK_STREAM, 0)
|
|
if socketFileDescriptor == -1 {
|
|
return (false, "SocketCreationFailed, \(descriptionOfLastError())")
|
|
}
|
|
|
|
var addr = sockaddr_in()
|
|
let sizeOfSockkAddr = MemoryLayout<sockaddr_in>.size
|
|
addr.sin_len = __uint8_t(sizeOfSockkAddr)
|
|
addr.sin_family = sa_family_t(AF_INET)
|
|
addr.sin_port = Int(OSHostByteOrder()) == OSLittleEndian ? _OSSwapInt16(port) : port
|
|
addr.sin_addr = in_addr(s_addr: inet_addr(host))
|
|
addr.sin_zero = (0, 0, 0, 0, 0, 0, 0, 0)
|
|
var bind_addr = sockaddr()
|
|
memcpy(&bind_addr, &addr, Int(sizeOfSockkAddr))
|
|
|
|
if Darwin.bind(socketFileDescriptor, &bind_addr, socklen_t(sizeOfSockkAddr)) == -1 {
|
|
let details = descriptionOfLastError()
|
|
release(socket: socketFileDescriptor)
|
|
return (false, "\(port), BindFailed, \(details)")
|
|
}
|
|
if listen(socketFileDescriptor, SOMAXCONN ) == -1 {
|
|
let details = descriptionOfLastError()
|
|
release(socket: socketFileDescriptor)
|
|
return (false, "\(port), ListenFailed, \(details)")
|
|
}
|
|
release(socket: socketFileDescriptor)
|
|
return (true, "\(port) is free for use")
|
|
}
|
|
|
|
static func release(socket: Int32) {
|
|
Darwin.shutdown(socket, SHUT_RDWR)
|
|
close(socket)
|
|
}
|
|
static func descriptionOfLastError() -> String {
|
|
return String(cString: UnsafePointer(strerror(errno)))
|
|
}
|
|
}
|