Getting the remote socket address

[mickeyl]

Thanks for this great package. I'm using this on Linux.

What's the best way to get the remote socket address after the accept returns?

[OrkhanAlikhanov]

Hey! Sorry for late response.

I think you would that similar to getting port:

Socket.swift/Sources/Socket.swift

Lines 196 to 208 in 36911c1

	/// Returns the local port number to which the socket is bound.
	///
	/// - Returns: Local port to which the socket is bound.
	open func port() throws -> Port {
	var address = sockaddr_in()
	var len = socklen_t(MemoryLayout.size(ofValue: address))
	let ptr = UnsafeMutableRawPointer(&address).assumingMemoryBound(to: sockaddr.self)
	try ing { getsockname(fileDescriptor, ptr, &len) }
	return Port(address.sin_port.bigEndian)
	}
	}

Instead of sin_port you would use sin_addr.

It will have some sort of structure that needs to be converted to string. You can use c functions which to do that. Here is and examples:
https://stackoverflow.com/q/1276294/5555803
https://stackoverflow.com/a/5328184/5555803

^{I am assuming you need the ip address from the accepted socket.}

If you still can't get it work, I can help you further.

[mickeyl]

Thanks, here's what I ended up with:

var address = sockaddr_in()
var len = socklen_t(MemoryLayout.size(ofValue: address))
let ptr = UnsafeMutableRawPointer(&address).assumingMemoryBound(to: sockaddr.self)
try ing { getpeername(client.fileDescriptor, ptr, &len) }

var buffer: [CChar] = .init(repeating: 0, count: 100)
let remoteHost: String = buffer.withUnsafeMutableBufferPointer { pointer in
    guard let cString = inet_ntop(AF_INET, &address.sin_addr, pointer.baseAddress, 100) else { return "unknown" }
    return String(cString: cString)
}

Would a remoteHost or peerName function be useful in the library itself?

[OrkhanAlikhanov]

That's great! remoteAddress would be better I think.

If you are up to something serious, I would suggest looking into apple/swift-nio