Modern Systems Programming with Scala Native

Making a TCP Connection

At last, we’re ready to make a TCP connection. To do it, we’ll write a helper function that takes a port and an address and performs all the necessary calls to getaddrinfo(), socket(), and connect(), in that order. We’ll call the function makeConnection(). If we get errors at any point, we can raise exceptions, just like in an ordinary Scala program, and return the socket as an Int otherwise.

HTTPClient/tcpclient/TCPClient.scala

def makeConnection(address:CString, port:CString):Int = {
  val hints = stackalloc[addrinfo]
  string.memset(hints.asInstanceOf[Ptr[Byte]], 0, sizeof[addrinfo])
  hints.ai_family = AF_UNSPEC
  hints.ai_socktype = SOCK_STREAM

  val addrInfo_ptr:Ptr[Ptr[ ...