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<refentry id='pg38'>
<refmeta>
  <refentrytitle>PG3</refentrytitle>
  <manvolnum>8</manvolnum>
  <refmiscinfo class='manual'>iputils</refmiscinfo>
</refmeta>
<refnamediv>
  <refname>pg3</refname>
  <refname>ipg</refname>
  <refname>pgset</refname>
  <refpurpose>send stream of UDP packets</refpurpose>
</refnamediv>
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<refsynopsisdiv id='synopsis'>
  <cmdsynopsis>
    <command>source</command>
    <arg choice='plain'><replaceable>ipg</replaceable></arg>
    <sbr/>
  </cmdsynopsis>
  <cmdsynopsis>
    <command>pg</command>
    <sbr/>
  </cmdsynopsis>
  <cmdsynopsis>
    <command>pgset</command>    <arg choice='plain'><replaceable>COMMAND</replaceable></arg>
    <sbr/>
  </cmdsynopsis>
</refsynopsisdiv>


<refsect1 id='description'>
  <title>DESCRIPTION</title>
  <para><emphasis remap='B'>ipg</emphasis> is not a program, it is script which should be sourced
to <emphasis remap='B'>bash</emphasis>. When sourced it loads module <emphasis remap='I'>pg3</emphasis> and
exports a few of functions accessible from parent shell. These macros
are <command>pg</command> to start packet injection and to get the results of run;
and <command>pgset</command> to setup packet generator.</para>

  <para><command>pgset</command> can send the following commands to module <emphasis remap='I'>pg3</emphasis>:</para>
</refsect1>

<refsect1 id='command'>
  <title>COMMAND</title>
<variablelist remap='TP'>
  <varlistentry>
  <term><emphasis remap='B'>odev </emphasis><emphasis remap='I'>DEVICE</emphasis></term>
  <listitem>
<para>Name of Ethernet device to test. See
warning below.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>pkt_size </emphasis><emphasis remap='I'>BYTES</emphasis></term>
  <listitem>
<para>Size of packet to generate. The size includes all the headers: UDP, IP,
MAC, but does not account for overhead internal to medium, i.e. FCS
and various paddings.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>frags </emphasis><emphasis remap='I'>NUMBER</emphasis></term>
  <listitem>
<para>Each packet will contain <emphasis remap='I'>NUMBER</emphasis> of fragments.
Maximal amount for linux-2.4 is 6. Far not all the devices support
fragmented buffers.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>count </emphasis><emphasis remap='I'>NUMBER</emphasis></term>
  <listitem>
<para>Send stream of <emphasis remap='I'>NUMBER</emphasis> of packets and stop after this.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>ipg </emphasis><emphasis remap='I'>TIME</emphasis></term>
  <listitem>
<para>Introduce artificial delay between packets of <emphasis remap='I'>TIME</emphasis>
microseconds.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>dst </emphasis><emphasis remap='I'>IP_ADDRESS</emphasis></term>
  <listitem>
<para>Select IP destination where the stream is sent to.
Beware, never set this address at random. <emphasis remap='B'>pg3</emphasis> is not a toy,
it creates really tough stream. Default value is 0.0.0.0.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>dst </emphasis><emphasis remap='I'>MAC_ADDRESS</emphasis></term>
  <listitem>
<para>Select MAC destination where the stream is sent to.
Default value is 00:00:00:00:00:00 in hope that this will not be received
by any node on LAN.</para>
  </listitem>
  </varlistentry>
  <varlistentry>
  <term><emphasis remap='B'>stop</emphasis></term>
  <listitem>
<para>Abort packet injection.</para>
  </listitem>
  </varlistentry>
</variablelist>
</refsect1>

<refsect1 id='warning'>
  <title>WARNING</title>
  <para>When output device is set to some random device different
of hardware Ethernet device, <emphasis remap='B'>pg3</emphasis> will crash kernel.</para>

  <para>Do not use it on VLAN, ethertap, VTUN and other devices,
which emulate Ethernet not being real Ethernet in fact.</para>
</refsect1>

<refsect1 id='author'>
  <title>AUTHOR</title>
  <para><emphasis remap='B'>pg3</emphasis> was written by Robert Olsson &lt;robert.olsson@its.uu.se&gt;.</para>
</refsect1>

<refsect1 id='security'>
  <title>SECURITY</title>
  <para>This can be used only by superuser.</para>

  <para>This tool creates floods of packets which is unlikely to be handled
even by high-end machines. For example, it saturates gigabit link with
60 byte packets when used with Intel's e1000. In face of such stream
switches, routers and end hosts may deadlock, crash, explode.
Use only in test lab environment.</para>
</refsect1>

<refsect1 id='availability'>
  <title>AVAILABILITY</title>
  <para><emphasis remap='B'>pg3</emphasis> is part of <emphasis remap='I'>iputils</emphasis> package.</para>
</refsect1>
</refentry>