Differences for page hping outifa -- hping network security tool

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Differences for page hping outifa

Current version compared with version Wed Sep 29 06:04:44 GMT 2004

...
- with a given address is trivial, such a procedure is included
- in the hping standard library (hpingstdlib.htcl).+ with a given address is trivial, such a command ([outifname]) is included
+ in the hping standard library [hpingstdlib.htcl].

The following is the old page content

{hping outifa `target`}

Return the address of the outgoing interface to reach `target`.
Suppose you want to rewrite the [ping] program in [hping], you need to
know what is the interface used to send and receive packets for a given
destination. The outifa subcommand does exactly this: it returns the
[IPv4] address of the outgoing interface for the `target` destination.

Assuming there are no bugs nor very strange configurations, the
address returned will match at least one of the interface addresses
returned with hping iflist. The implementation of this command
may not work in all the cases in this beta version of [hping].

===Example===

hping3.0.0-alpha> hping outifa www.google.com
 192.168.1.6
 hping3.0.0-alpha> hping iflist
 {lo 16436 {127.0.0.1} {LOOPBACK}} {eth0 1500 {192.168.1.6} {}}

As you can see 192.168.1.6 is the eth0 unique address -- note that
the host is configured with a 192.168.1.1 as default gateway.

To write a [Tcl] procedure that returns the name of the interface
with a given address is trivial, such a procedure is included
in the hping standard library (hpingstdlib.htcl).