*/

Tcl_Channel
Tcl_OpenTcpServerEx(
    Tcl_Interp *interp,		/* For error reporting - may be NULL. */
    int port,			/* Port number to open. */
    const char *myHost,		/* Name of local host. */
    unsigned int flags,		/* Flags (not used) */
    unsigned int flags,		/* Flags. */
    Tcl_TcpAcceptProc *acceptProc,
				/* Callback for accepting connections from new
				 * clients. */
    ClientData acceptProcData)	/* Data for the callback. */
{
    SOCKET sock = INVALID_SOCKET;
    unsigned short chosenport = 0;
    struct addrinfo *addrlist = NULL;
    struct addrinfo *addrPtr;	/* Socket address to listen on. */
    TcpState *statePtr = NULL;	/* The returned value. */
    char channelName[SOCK_CHAN_LENGTH];
    u_long flag = 1;		/* Indicates nonblocking mode. */
    const char *errorMsg = NULL;
    int optvalue;

    if (TclpHasSockets(interp) != TCL_OK) {
	return NULL;
    }

    /*
     * Check that WinSock is initialized; do not call it if not, to prevent

	if (port == 0 && chosenport != 0) {
	    ((struct sockaddr_in *) addrPtr->ai_addr)->sin_port =
		htons(chosenport);
	}

	/*
	 * The SO_REUSEADDR option on Windows behaves like SO_REUSEPORT on unix
	 * systems.
	 */
	if (flags & TCL_TCPSERVER_REUSEPORT) {
	    optvalue = 1;
	    (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
			      (char *) &optvalue, sizeof(optvalue));
	}

	/*
	 * Bind to the specified port. Note that we must not call
	 * Bind to the specified port.
	 * setsockopt with SO_REUSEADDR or SO_REUSEPORT because Microsoft
	 * allows addresses and ports to be reused even if they are still in use.
	 *
	 * Bind should not be affected by the socket having already been
	 * set into nonblocking mode. If there is trouble, this is one
	 * place to look for bugs.
	 */

	if (bind(sock, addrPtr->ai_addr, addrPtr->ai_addrlen)