TRIPP is a utility to rewrite incoming and
outgoing IP packets. Since it can rewrite both
headers and payload, it can be used to configure
the TCP/IP stack behavior in order to perform
various tasks mainly intended for network tests,
simulations, and development. It is configured via
a small rule-based language, which allows the user
to intercept packets, set arbitrary header values,
increment or decrement numeric header fields, set
an arbitrary payload, rewrite parts of the
payload, or fragment, delay, multiply, or drop packets.
It is totally user-level and doesn't require a
kernel module.
