improve random MAC address generation

[pve-common.git] / data / PVE / Tools.pm

diff --git a/data/PVE/Tools.pm b/data/PVE/Tools.pm
index 922c0e6685d6773ff9210428bde34b4931069b83..622f8ad02cd430763b5b577e6722436b8cc7489a 100644 (file)
--- a/data/PVE/Tools.pm
+++ b/data/PVE/Tools.pm
@@ -17,6 +17,7 @@ use Encode;
 use Digest::SHA;
 use Text::ParseWords;
 use String::ShellQuote;
+use Time::HiRes qw(usleep gettimeofday tv_interval);
 
 our @EXPORT_OK = qw(
 $IPV6RE
@@ -627,13 +628,16 @@ sub extract_param {
     return $res;
 }
 
-# Note: we use this to wait until vncterm is ready
+# Note: we use this to wait until vncterm/spiceterm is ready
 sub wait_for_vnc_port {
     my ($port, $timeout) = @_;
 
     $timeout = 5 if !$timeout;
+    my $sleeptime = 0;
+    my $starttime = [gettimeofday];
+    my $elapsed;
 
-    for (my $i = 0; $i < $timeout; $i++) {
+    while (($elapsed = tv_interval($starttime)) < $timeout) {
        if (my $fh = IO::File->new ("/proc/net/tcp", "r")) {
            while (defined (my $line = <$fh>)) {
                if ($line =~ m/^\s*\d+:\s+([0-9A-Fa-f]{8}):([0-9A-Fa-f]{4})\s/) {
@@ -645,7 +649,8 @@ sub wait_for_vnc_port {
            }
            close($fh);
        }
-       sleep(1);
+       $sleeptime += 100000 if  $sleeptime < 1000000;
+       usleep($sleeptime);
     }
 
     return undef;
@@ -724,6 +729,10 @@ sub next_vnc_port {
     return next_unused_port(5900, 6000);
 }
 
+sub next_spice_port {
+    return next_unused_port(61000, 61099);
+}
+
 # NOTE: NFS syscall can't be interrupted, so alarm does 
 # not work to provide timeouts.
 # from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation"
@@ -873,7 +882,9 @@ sub decode_utf8_parameters {
 
 sub random_ether_addr {
 
-    my $rand = Digest::SHA::sha1_hex(rand(), time());
+    my ($seconds, $microseconds) = gettimeofday;
+
+    my $rand = Digest::SHA::sha1_hex($$, rand(), $seconds, $microseconds);
 
     my $mac = '';
     for (my $i = 0; $i < 6; $i++) {