The ICMP Statement
On systems without the BSD routing socket, gated listens to ICMP
messages received by the system. Currently gated only does processing
on ICMP redirect packets, but more functionality may be added in the
future, such as support for the router discovery messages. Processing
of ICMP redirect messages is handled by the redirect statement.
Currently the only reason to specify the icmp statement
is to be able to trace the ICMP messages that gated receives.
The ICMP statement
icmp {
traceoptions trace_options ;
}
- traceoptions trace_options ;
- Specifies the tracing options for ICMP.
(See Trace Statements and the ICMP specific
tracing options below.)
Tracing options
Packet tracing options (which may be modified with detail
and recv):
- packets
- All ICMP packets received.
- redirect
- Only ICMP
REDIRECT packets received.
- routerdiscovery
- Only ICMP
ROUTER DISCOVERY packets received.
- info
- Only ICMP informational packets, which include mask
request/response, info request/response, echo request/response
and time stamp request/response.
- error
- Only ICMP error packets, which include time exceeded, parameter
problem, unreachable and source quench.
Last updated 1994/03/16 21:38:23.
gated@gated.cornell.edu