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RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD Others

IPRESEND(1)                OpenBSD Reference Manual                IPRESEND(1)

     ipresend - resend IP packets out to network

     ipsend [-EHPRSTX] [-d device] [-g gateway] [-m mtu] [-r filename]

     ipresend was designed to allow captured packets to be resent onto the
     network for use in testing.  ipresend supports a number of different file
     formats as input, including saved snoop and tcpdump(8) binary data.

     ipresend must be run as root.


     -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
                   packets. 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        Set the MTU used when sending out packets to mtu. This op-
                   tion allows you to set a fake MTU, allowing the simulation
                   of network interfaces with small MTU's.

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

     -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 -r is a binary file produced
                   using libpcap (i.e., tcpdump(8) 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).
                   Packets are read from this file and used as input from any
                   interface. This is perhaps the most useful input type, cur-

     -T            The input file is to be text output from tcpdump(8).  The
                   text formats which are currently supported are those which
                   result from the following tcpdump(8) option combinations:

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

     -X            The input file is composed of text descriptions of IP pack-

     ipftest(1),  ipresend(1),  iptest(1),  bpf(4),  tcpdump(8)

     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@cyber.com.au

OpenBSD 2.6                     October 9, 1999                              2

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for ipresend(1)
OpenBSD sources for ipresend(1)

[Overview Topics]

Up to: Communication Debugging - Status, tracing, and debugging communications and protocols.

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