Updated Swift example

examples/bindings/swift/libztExampleApp/libztExampleApp/main.swift

@@ -0,0 +1,46 @@
+//
+//  main.swift
+//  libztExampleApp
+//
+//  Created by Joseph Henry on 10/19/17.
+//  Copyright © 2017 ZeroTier, Inc. All rights reserved.
+//
+
+print("starting libzt...")
+zts_startjoin("xcode_libzt_path", "XXXXXXXXXXXXXXXX")
+print("libzt is online.")
+
+// create address structure
+var addr_str = "0.0.0.0"
+var port = 8080
+var in4 = sockaddr_in(sin_len: UInt8(MemoryLayout<sockaddr_in>.size),
+                      sin_family: UInt8(AF_INET),
+                      sin_port: UInt16(port).bigEndian,
+                      sin_addr: in_addr(s_addr: 0),
+                      sin_zero: (0,0,0,0,0,0,0,0))
+inet_pton(AF_INET, addr_str, &(in4.sin_addr));
+
+// socket()
+var fd = zts_socket(2, 1, 0)
+
+// bind()
+var addrlen = socklen_t(MemoryLayout.size(ofValue: in4))
+let a = withUnsafeMutablePointer(to: &in4) {
+    $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
+        zts_bind(fd, $0, addrlen)
+    }
+}
+
+// listen()
+zts_listen(fd, 1)
+
+// accept
+var clientAddress: sockaddr_in?
+
+addrlen = socklen_t(MemoryLayout.size(ofValue: clientAddress))
+let b = withUnsafeMutablePointer(to: &clientAddress) {
+    $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
+        zts_accept(fd, UnsafeMutablePointer<sockaddr>($0), UnsafeMutablePointer<socklen_t>(&addrlen))
+    }
+}
+