=over =item setsockopt SOCKET,LEVEL,OPTNAME,OPTVAL X Sets the socket option requested. Returns L|/undef EXPR> on error. Use integer constants provided by the L|Socket> module for LEVEL and OPNAME. Values for LEVEL can also be obtained from getprotobyname. OPTVAL might either be a packed string or an integer. An integer OPTVAL is shorthand for pack("i", OPTVAL). An example disabling Nagle's algorithm on a socket: use Socket qw(IPPROTO_TCP TCP_NODELAY); setsockopt($socket, IPPROTO_TCP, TCP_NODELAY, 1); Portability issues: L. =back