From 05903883b79ab3b23f51bd69458ca292fb0b3437 Mon Sep 17 00:00:00 2001
From: James Davidson <james.davidson@vyatta.com>
Date: Thu, 25 Apr 2013 15:29:09 -0700
Subject: Add size and files options to "traffic save"

Bug 8020
The total storage used by a traffic capture can be bounded by using
the size and files options.
---
 gen-monitor-interface-templates.sh     | 22 +++++++++++++--
 gen-monitor-vif-interface-templates.sh | 23 +++++++++++++--
 scripts/vyatta-tshark.pl               | 51 +++++++++++++++++++++++++++++-----
 3 files changed, 84 insertions(+), 12 deletions(-)

diff --git a/gen-monitor-interface-templates.sh b/gen-monitor-interface-templates.sh
index ee9e9ca..67c9e7e 100755
--- a/gen-monitor-interface-templates.sh
+++ b/gen-monitor-interface-templates.sh
@@ -2,6 +2,8 @@
 #monitor interfaces [type] [name] traffic
 #monitor interfaces [type] [name] traffic flow
 #monitor interfaces [type] [name] traffic save [filename]
+#monitor interfaces [type] [name] traffic save [filename] size [number]
+#monitor interfaces [type] [name] traffic save [filename] size [number] files [number]
 #monitor interfaces [type] [name] traffic detail
 #monitor interfaces [type] [name] traffic detail filter
 #monitor interfaces [type] [name] traffic detail unlimited
@@ -27,7 +29,7 @@ cd $TEMPLATE_DIR
 
 for type in "${types[@]}"; do
   mkdir -p $type/node.tag/flow
-  mkdir -p $type/node.tag/traffic/save/node.tag
+  mkdir -p $type/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag
   mkdir -p $type/node.tag/traffic/detail/filter/node.tag
   mkdir -p $type/node.tag/traffic/detail/unlimited/filter/node.tag
   mkdir -p $type/node.tag/traffic/filter/node.tag
@@ -47,8 +49,22 @@ for type in "${types[@]}"; do
   echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4' >> $type/node.tag/traffic/node.def
 
   # traffic save
-  echo 'help: Save monitored traffic to a file' >|  $type/node.tag/traffic/save/node.def
-  echo -e 'help: Save monitored traffic to a file\nrun: ${vyatta_bindir}/vyatta-tshark.pl --intf $4 --save "${@:7}"' >|  $type/node.tag/traffic/save/node.tag/node.def
+  echo 'help: Save monitored traffic to a file' >| $type/node.tag/traffic/save/node.def
+  echo 'help: Save monitored traffic to the specified file' >| $type/node.tag/traffic/save/node.tag/node.def
+  echo "allowed: echo -e '<name>.pcap'" >>  $type/node.tag/traffic/save/node.tag/node.def
+  echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4 --save "${@:7}"' >>  $type/node.tag/traffic/save/node.tag/node.def
+
+  # traffic save size
+  echo 'help: Save monitored traffic to a file with max size' >| $type/node.tag/traffic/save/node.tag/size/node.def
+  echo "help: Maximum file size (e.g., 1 = 1 KiB, 1M = 1 MiB)" >| $type/node.tag/traffic/save/node.tag/size/node.tag/node.def
+  echo "allowed: echo -e '<number>'" >> $type/node.tag/traffic/save/node.tag/size/node.tag/node.def
+  echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4 --save "${@:7}" --size "${@:9}"' >> $type/node.tag/traffic/save/node.tag/size/node.tag/node.def
+
+  # traffic save size files
+  echo 'help: Save monitored traffic to a set of rotated file' >| $type/node.tag/traffic/save/node.tag/size/node.tag/files/node.def
+  echo 'help: Number of files to rotate stored traffic through' >| $type/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag/node.def
+  echo "allowed: echo -e '<number>'" >> $type/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag/node.def
+  echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4 --save "${@:7}" --size "${@:9}" --files "${@:11}"' >> $type/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag/node.def
 
   # traffic detail
   echo -e "help: Monitor detailed traffic for the specified $type interface" >| $type/node.tag/traffic/detail/node.def
diff --git a/gen-monitor-vif-interface-templates.sh b/gen-monitor-vif-interface-templates.sh
index b0ef822..ac128e8 100755
--- a/gen-monitor-vif-interface-templates.sh
+++ b/gen-monitor-vif-interface-templates.sh
@@ -21,7 +21,7 @@ cd $TEMPLATE_DIR
 
 for type in "${types[@]}"; do
   mkdir -p $type/node.tag/vif/node.tag/flow
-  mkdir -p $type/node.tag/vif/node.tag/traffic/save/node.tag
+  mkdir -p $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag
   mkdir -p $type/node.tag/vif/node.tag/traffic/detail/filter/node.tag
   mkdir -p $type/node.tag/vif/node.tag/traffic/detail/unlimited/filter/node.tag
   mkdir -p $type/node.tag/vif/node.tag/traffic/filter/node.tag
@@ -36,13 +36,32 @@ for type in "${types[@]}"; do
   echo 'help: Monitor flows on specified interface' >| $type/node.tag/vif/node.tag/flow/node.def
   echo 'run: sudo /usr/sbin/iftop -i $4.$6' >> $type/node.tag/vif/node.tag/flow/node.def
 
+  # node.tag
+  echo "help: Monitor specified $type interface" > $type/node.tag/vif/node.tag/node.def
+  echo "allowed: \${vyatta_sbindir}/vyatta-interfaces.pl --show $type --vif \${COMP_WORDS[COMP_CWORD-2]}" >> $type/node.tag/vif/node.tag/node.def
+  echo 'run: bmon -p $4.$6' >> $type/node.tag/vif/node.tag/node.def
+
   # traffic
   echo "help: Montior captured traffic on specified $type interface" >| $type/node.tag/vif/node.tag/traffic/node.def
   echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4.$6' >> $type/node.tag/vif/node.tag/traffic/node.def
 
   # traffic save
   echo 'help: Save monitored traffic to a file' >|  $type/node.tag/vif/node.tag/traffic/save/node.def
-  echo -e 'help: Save monitored traffic to a file\nrun: ${vyatta_bindir}/vyatta-tshark.pl --intf $4.$6 --save "${@:9}"' >|  $type/node.tag/vif/node.tag/traffic/save/node.tag/node.def
+  echo 'help: Save monitored traffic to the specified file' >|  $type/node.tag/vif/node.tag/traffic/save/node.tag/node.def
+  echo "allowed: echo -e '<name>.pcap'" >> $type/node.tag/vif/node.tag/traffic/save/node.tag/node.def
+  echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4.$6 --save "${@:9}"' >> $type/node.tag/vif/node.tag/traffic/save/node.tag/node.def
+
+  # traffic save size
+  echo 'help: Save monitored traffic to a file with max size' >| $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.def
+  echo "help: Maximum file size (e.g., 1 = 1 KiB, 1M = 1 MiB)" >| $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/node.def
+  echo "allowed: echo -e '<number>'" >> $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/node.def
+  echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4 --save "${@:7}" --size "${@:9}"' >> $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/node.def
+
+  # traffic save size files
+  echo 'help: Save monitored traffic to a set of rotated files' >| $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/files/node.def
+  echo 'help: Number of files to rotate stored traffic through' >| $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag/node.def
+  echo "allowed: echo -e '<number>'" >> $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag/node.def
+  echo 'run: ${vyatta_bindir}/vyatta-tshark.pl --intf $4 --save "${@:7}" --size "${@:9}" --files "${@:11}"' >> $type/node.tag/vif/node.tag/traffic/save/node.tag/size/node.tag/files/node.tag/node.def
 
   # traffic detail
   echo -e "help: Monitor detailed traffic for the specified $type interface" >| $type/node.tag/vif/node.tag/traffic/detail/node.def
diff --git a/scripts/vyatta-tshark.pl b/scripts/vyatta-tshark.pl
index c065cbe..5423cfc 100755
--- a/scripts/vyatta-tshark.pl
+++ b/scripts/vyatta-tshark.pl
@@ -54,16 +54,48 @@ sub check_if_interface_is_tsharkable {
     }
 }
 
+my ($detail,$filter,$intf,$unlimited,$save,$files,$size);
+
+#
+# The size parameter can have one of the following
+# unit suffixes:
+#
+# - [kK] KiB (1024 bytes)
+# - [mM] MiB (1048576 bytes)
+# - [gG] GiB (1073741824 bytes)
+# - [tT] TiB (109951162778 bytes)
+#
+# Note: tshark's default size unit is KiB
+sub parse_size {
+    my ( $name, $parm ) = @_;
+    my %mult = ('T' => 1073741824, 't' => 1073741824,
+                'G' => 1048576,    'g' => 1048576,
+                'M' => 1024,       'm' => 1024,
+                'K' => 1,          'k' => 1);
+
+    die "Invalid parameter: $name" if ($name ne "size");
+    my ( $value, $unit ) = $parm =~ m/^([0-9]+)([kKmMgGtT])?$/;
+    die "Invalid size specified" unless $value;
+    $unit = "K" unless $unit;
+    $size = $value * $mult{$unit};
+}
+
 #
 # main
 #
-my ($detail,$filter,$intf,$unlimited,$save);
 
-GetOptions("detail!"                => \$detail,
-           "filter=s"               => \$filter,
-           "save=s"                 => \$save,
-           "intf=s"                 => \$intf,
-           "unlimited!"             => \$unlimited);
+my $result = GetOptions("detail!"                => \$detail,
+                        "filter=s"               => \$filter,
+                        "save=s"                 => \$save,
+                        "intf=s"                 => \$intf,
+                        "unlimited!"             => \$unlimited,
+                        "files=i"                => \$files,
+                        "size=s"                 => \&parse_size);
+
+if (! $result) {
+    print "Invalid option specifications\n";
+    exit 1;
+}
 
 check_if_interface_is_tsharkable($intf);
 
@@ -72,7 +104,12 @@ if (defined($save)){
     print("Please name your file <filename>.pcap\n");
     exit 1;
   }
-  exec "/usr/bin/tshark -i $intf -w '$save'"; 
+  my $options = "";
+
+  # the CLI will make sure that files is not defined w/o size also
+  $options .= " -a filesize:$size" if defined($size);
+  $options .= " -b files:$files" if defined($files);
+  exec "/usr/bin/tshark -i $intf -w '$save' $options";
   exit 0;
 }
 
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