New SVDRP command MESG; SVDRP can reuse port; SVDRP timeout

1 files changed, 57 insertions, 0 deletions

diff --git a/svdrpsend.pl b/svdrpsend.pl
new file mode 100755
index 00000000..5efd504b
--- /dev/null
+++ b/svdrpsend.pl
@@ -0,0 +1,57 @@
+#!/usr/bin/perl
+
+use Socket;
+use Getopt::Std;
+
+$Usage = qq{
+Usage: $0 options command...
+
+Options: -d hostname        destination hostname (default: localhost)
+         -p port            SVDRP port number (default: 2001)
+};
+
+die $Usage if (!$ARGV[0] || !getopts("d:p:"));
+
+$Dest = $opt_d  || "localhost";
+$Port = $opt_p  || 2001;
+$Cmd  = "@ARGV" || Error("missing command");
+
+$Timeout = 10; # max. seconds to wait for response
+
+$SIG{ALRM} = sub { Error("timeout"); };
+alarm($Timeout);
+
+$iaddr = inet_aton($Dest)                   || Error("no host: $Dest");
+$paddr = sockaddr_in($Port, $iaddr);
+
+$proto = getprotobyname('tcp');
+socket(SOCK, PF_INET, SOCK_STREAM, $proto)  || Error("socket: $!");
+connect(SOCK, $paddr)                       || Error("connect: $!");
+select(SOCK); $| = 1;
+Receive();
+Send($Cmd);
+Send("quit");
+close(SOCK)                                 || Error("close: $!");
+
+sub Send
+{
+  my $cmd = shift || Error("no command to send");
+  print SOCK "$cmd\r\n";
+  Receive();
+}
+
+sub Receive
+{
+  while (<SOCK>) {
+        print STDOUT $_;
+        last if substr($_, 3, 1) ne "-";
+        }
+}
+
+sub Error
+{
+  print STDERR "@_\n";
+  close(SOCK);
+  exit 0;
+}
+