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IPRESEND(1)							   IPRESEND(1)

NAME
       ipresend - resend IP packets out to network

SYNOPSIS
       ipresend	 [  -EHPRSTX ] [ -d <device> ] [ -g <gateway> ] [ -m <MTU> ] [
       -r <filename> ]

DESCRIPTION
       ipresend was designed to allow packets to  be  resent,  once  captured,
       back out onto the network for use in testing.  ipresend supports a num‐
       ber of different file formats as input, including  saved	 snoop/tcpdump
       binary data.

OPTIONS
       -d <interface>
	      Set  the interface name to be the name supplied.	This is useful
	      with the -P, -S, -T and -E options, where it  is	not  otherwise
	      possible	to associate a packet with an interface.  Normal "text
	      packets" can override this setting.

       -g <gateway>
	      Specify the hostname of the gateway through which to route pack‐
	      ets.   This  is  required	 whenever  the	destination host isn't
	      directly attached to the same network as	the  host  from	 which
	      you're sending.

       -m <MTU>
	      Specify  the  MTU	 to  be	 used  when sending out packets.  This
	      option allows you to set a fake MTU, allowing the simulation  of
	      network interfaces with small MTU's without setting them so.

       -r <filename>
	      Specify  the  filename  from  which  to  take input.  Default is
	      stdin.

       -E     The input file is to be text output from	etherfind.   The  text
	      formats  which  are  currently  supported are those which result
	      from the following etherfind option combinations:

		 etherfind -n
		 etherfind -n -t

       -H     The input file is to be  hex  digits,  representing  the	binary
	      makeup  of  the  packet.	 No  length  correction is made, if an
	      incorrect length is put in the IP header.

       -P     The input file specified by -i is a binary file  produced	 using
	      libpcap  (i.e.,  tcpdump version 3).  Packets are read from this
	      file as being input (for rule purposes).

       -R     When sending packets out, send them out "raw" (the way they came
	      in).  The only real significance here is that it will expect the
	      link layer (i.e.	ethernet) headers to be prepended  to  the  IP
	      packet being output.

       -S     The input file is to be in "snoop" format (see RFC 1761).	 Pack‐
	      ets are read from this file and used as input  from  any	inter‐
	      face.  This is perhaps the most useful input type, currently.

       -T     The input file is to be text output from tcpdump.	 The text for‐
	      mats which are currently supported are those which  result  from
	      the following tcpdump option combinations:

		 tcpdump -n
		 tcpdump -nq
		 tcpdump -nqt
		 tcpdump -nqtt
		 tcpdump -nqte

       -X     The input file is composed of text descriptions of IP packets.

SEE ALSO
       snoop(1m),    tcpdump(8),   etherfind(8c),   ipftest(1),	  ipresend(1),
       iptest(1), bpf(4), dlpi(7p)

DIAGNOSTICS
       Needs to be run as root.

BUGS
       Not all of the input formats are sufficiently capable of introducing  a
       wide  enough  variety  of packets for them to be all useful in testing.
       If you find any, please send email to me at darrenr@pobox.com

								   IPRESEND(1)
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