+my $oldw = $^W;
+$^W = 0;
+eval "use Socket qw(IPPROTO_TCP TCP_NODELAY)";
+$^W = $oldw;
+if ($@ && !$main::inwin) {
+ sub IPPROTO_TCP {6;}
+ sub TCP_NODELAY {1;};
+}
+
+sub nolinger
+{
+ my $conn = shift;
+
+ if (isdbg('sock')) {
+ my ($l, $t) = unpack "ll", getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER);
+ my $k = unpack 'l', getsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE);
+ my $n = unpack "l", getsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY);
+ dbg("Linger is: $l $t, keepalive: $k, nagle: $n");
+ }
+
+ setsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER, pack("ll", 0, 0)) or confess "setsockopt linger: $!";
+ setsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE, 1) or confess "setsockopt keepalive: $!";
+ setsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY, 1) or confess "setsockopt: $!" unless $main::iswin;
+ $conn->{sock}->autoflush(0);
+
+ if (isdbg('sock')) {
+ my ($l, $t) = unpack "ll", getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER);
+ my $k = unpack 'l', getsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE);
+ my $n = unpack "l", getsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY);
+ dbg("Linger is: $l $t, keepalive: $k, nagle: $n");
+ }
+}
+