53 lines
1.4 KiB
Swift
53 lines
1.4 KiB
Swift
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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import Foundation
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class PortUtils {
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static func isPortFree(_ port: in_port_t) -> Bool {
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let socketFileDescriptor = socket(AF_INET, SOCK_STREAM, 0)
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if socketFileDescriptor == -1 {
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return false
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}
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var addr = sockaddr_in()
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let sizeOfSockkAddr = MemoryLayout<sockaddr_in>.size
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addr.sin_len = __uint8_t(sizeOfSockkAddr)
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addr.sin_family = sa_family_t(AF_INET)
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addr.sin_port = Int(OSHostByteOrder()) == OSLittleEndian ? _OSSwapInt16(port) : port
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addr.sin_addr = in_addr(s_addr: inet_addr("127.0.0.1"))
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addr.sin_zero = (0, 0, 0, 0, 0, 0, 0, 0)
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var bind_addr = sockaddr()
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memcpy(&bind_addr, &addr, Int(sizeOfSockkAddr))
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if Darwin.bind(socketFileDescriptor, &bind_addr, socklen_t(sizeOfSockkAddr)) == -1 {
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release(socket: socketFileDescriptor)
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return false
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}
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if listen(socketFileDescriptor, SOMAXCONN ) == -1 {
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release(socket: socketFileDescriptor)
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return false
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}
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release(socket: socketFileDescriptor)
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return true
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}
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private static func release(socket: Int32) {
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Darwin.shutdown(socket, SHUT_RDWR)
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close(socket)
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}
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static func getFreePort() -> in_port_t {
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var portNum: in_port_t = 0
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for i in 50000..<65000 {
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let isFree = isPortFree(in_port_t(i))
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if isFree {
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portNum = in_port_t(i)
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return portNum
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}
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}
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return in_port_t(0)
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}
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}
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