int silc_packet_wait(void *waiter, int timeout,
                         SilcPacket *return_packet)

    A special function that can be used to wait for a packet to arrive.
    This function will block the calling process or thread until either
    a packet is received into the `return_packet' pointer or the specified
    timeout value `timeout', which is in milliseconds, will expire.  If
    the timeout is 0, no timeout exist.  Before calling this function the
    silc_packet_wait_init must be called.  The caller is responsible for
    freeing the returned packet with silc_packet_free.

    This function can be used for example from a thread that wants to
    block until SILC packet has been received.

    Returns 1 when packet was received, 0 if timeout occurred and -1 if
    error occurred.

    static int foo_read_data(FooContext c)
    {
      SilcPacket packet;
      void *waiter;
      ...

      // Will wait for private message packets
      if (c->initialized == FALSE) {
        waiter = silc_packet_wait_init(stream,
                                       SILC_PACKET_PRIVATE_MESSAGE, -1);
        c->initialized = TRUE;
      }

      ...
      // Wait here until private message packet is received
      if ((silc_packet_wait(waiter, 0, &packet)) < 0)
        return -1;

      ... process packet ...

      return 1;
    }