`CheckICMPHeader`

checks ICMP header on ICMP packets

SYNOPSIS§

CheckICMPHeader([KEYWORDS])

Batching: Batching natively supported
Ports: 1 input, 1-2 outputs
Processing: agnostic, but output 1 is push

DESCRIPTION§

Expects ICMP packets as input. Checks that the packet's length is sensible and that its checksum field is valid. Pushes invalid packets out on output 1, unless output 1 was unused; if so, drops invalid packets.

Prints a message to the console the first time it encounters an incorrect IP packet (but see VERBOSE below).

Keyword arguments are:

VERBOSE — Boolean. If it is true, then a message will be printed for every erroneous packet, rather than just the first. False by default.
DETAILS — Boolean. If it is true, then CheckICMPHeader will maintain detailed counts of how many packets were dropped for each possible reason, accessible through the drop_details handler. False by default.

ELEMENT HANDLERS§

count (read-only) — Returns the number of correct packets CheckICMPHeader has seen.
drops (read-only) — Returns the number of incorrect packets CheckICMPHeader has seen.
drop_details (read-only) — Returns a text file showing how many erroneous packets CheckICMPHeader has seen, subdivided by error. Only available if the DETAILS keyword argument was true.

CheckICMPHeader

SYNOPSIS§

DESCRIPTION§

ELEMENT HANDLERS§

SEE ALSO§

`CheckICMPHeader`