[英]Socket Server via CFNetwork in Swift 4
I am new in Swift. 我是Swift的新手。
I am studying to write a pure swift app to be socket server. 我正在研究编写一个纯粹的快速应用程序作为套接字服务器。
code is as below 代码如下
server = CFSocketCreate(kCFAllocatorDefault, AF_INET,
SOCK_STREAM, IPPROTO_TCP, callbackOpts.rawValue, {
(socket, type, address, data, info) in
print("type ->\(type)")
}, nil)
let size = MemoryLayout<sockaddr_in>.size
addr.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
addr.sin_family = sa_family_t(AF_INET); /* Address family */
addr.sin_port = in_port_t(10001); /* Or a specific port */
addr.sin_addr.s_addr = in_addr_t(INADDR_ANY);
let addrInPtr = withUnsafeMutablePointer(to: &addr) { ptr in
return ptr.withMemoryRebound(to: UInt8.self, capacity: size){
return $0
}
}
let sincfd = CFDataCreate(
kCFAllocatorDefault,
addrInPtr,
size)
let result = CFSocketSetAddress(server, sincfd)
switch result {
case .success:
print("xx sucess")
case .timeout:
print("xx timeout")
case .error:
print("xx error")
}
let runLoopSourceRef = CFSocketCreateRunLoopSource(
kCFAllocatorDefault, server, 0)
CFRunLoopAddSource(CFRunLoopGetCurrent(),
runLoopSourceRef, CFRunLoopMode.defaultMode)
I got "xx success" when binder. 活页夹时我获得了“ xx成功”。
I can not connect this server from client. 我无法从客户端连接此服务器。
Does someone give me a hint what problem is and how to do a server? 有人给我一个提示是什么问题以及如何使用服务器?
I know there are some 3rd party library can do that, but I am studying Swift and try to understand how to use CFNetwork. 我知道有一些第三方库可以做到这一点,但是我正在研究Swift,并试图了解如何使用CFNetwork。
I just found my problem. 我刚发现我的问题。
It was caused by the byte order of port number. 这是由端口号的字节顺序引起的。
Code should be 代码应该是
addr.sin_port = in_port_t(CFSwapInt16HostToBig(10001))
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