Network Programming with Perl

Other Socket-Related Functions

In addition to the functions we have already seen, there are three Perl built-in functions related to sockets: send(), recv(), and socketpair(). We will use send() and recv() in later chapters of this book when we discuss TCP urgent data (Chapter 17), and the UDP protocol (Chapters 17–20).

$bytes = send (SOCK,$data,$flags[,$destination]) The send() function uses the socket indicated by the first argument to deliver the data indicated by $data, to the destination address indicated by $destination. If the data was successfully queued for transmission, send() returns the number of bytes sent; otherwise, it returns undef. The third argument, $flags, is the bitwise OR of zero or more of the two options listed in ...