Sets up pcb to connect to the remote host indicated
by ipaddr on port port and
sends the initial SYN segment which opens the connection.
The tcp_connect() function returns immediately; it does
not wait for the connection to be properly set up. Instead, it will call the
connected() function specified
as the fourth argument when the connection is established. If the connection
could not be properly established, either because the other host refused the
connection or because the other host didn't answer, the
connected() function will be
called with its err argument set accordingly.
Return value
The tcp_connect() function can return
ERR_MEM if no memory is available for enqueueing the
SYN segment. If the SYN indeed was
enqueued successfully, the tcp_connect() function
returns ERR_OK.
