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OS/2 Shareware BBS: 35 Internet
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35-Internet.zip
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sockperl.zip
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send_cry.nf
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1995-03-19
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2KB
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106 lines
#!/usr/bin/perl
# os/2 client built to send simple perl scripts over a des
# encrypted socket connection. Hacked from the 'Camel book'
# server and client scripts. Modifications are mostly to
# deal with 'fork()'ed processes not inheriting socket handles
# (hence the use of a second socket address for the reply!)
# Use of des is just for an interesting example, and to test
# use of piped io.
$them,$port) = @ARGV;
$port = 12345678 unless $port;
$port2 = 12345679 ;
$them = 'localhost' unless $them;
$AF_INET = 2;
$SOCK_STREAM = 1;
$SIG{'INT'} = 'dokill';
sub dokill {
kill 9,$child if $child;
}
$sockaddr = 'S n a4 x8';
chop($hostname = `hostname`);
($name,$aliases,$proto) = getprotobyname('tcp');
($name,$aliases,$port) = getservbyname($port,'tcp')
unless $port =~ /^\d+$/;;
($name,$aliases,$type,$len,$thisaddr)=gethostbyname($hostname);
($name,$aliases,$type,$len,$thataddr) = gethostbyname($them);
$this = pack($sockaddr, $AF_INET, 0, $thisaddr);
$that = pack($sockaddr, $AF_INET, $port, $thataddr);
# Make the socket filehandle.
if (socket(S, $AF_INET, $SOCK_STREAM, $proto)) {
print "socket ok\n";
}
else {
warn $!;
}
# Give the socket an address.
if (bind(S, $this)) {
print "bind ok\n";
}
else {
warn $!;
}
# Call up the server.
if (connect(S,$that)) {
print "connect ok\n";
}
else {
die $!;
}
# Set socket to be command buffered.
select(S); $| = 1; select(STDOUT);
# Avoid deadlock by forking.
#if($child != fork) {
while (<STDIN>) {
print S;
}
close(S);
sleep 2;
print "done sending\n";
#Accept call back to check reply
$this2 = pack($sockaddr, $AF_INET, $port2, "\0\0\0\0");
select(NS); $| = 1; select (stdout);
socket(S2, $AF_INET, $SOCK_STREAM, $proto) || die "socket: $!";
bind(S2,$this2) || die "bind: $!";
listen(S2,5) || die "connect: $!";
select(S2); $| = 1; select(stdout);
print "Listening for reply on $port2 ....\n";
#for(;;) {
($addr = accept(NS,S2)) || die $!;
@list = <NS>;
print "@list \n";
close (NS);
sleep 3;
do dokill();
#}
#else {
# while(<S>) {
# print;
# }
#}