Enum packet_formats::error::IpParseErrorAction

pub enum IpParseErrorAction {
    DiscardPacket,
    DiscardPacketSendIcmp,
    DiscardPacketSendIcmpNoMulticast,
}

Action to take when an IP node fails to parse a received IP packet.

These actions are taken from RFC 8200 section 4.2. Although these actions are defined by an IPv6 RFC, IPv4 nodes that fail to parse a received packet will take similar actions.

Variants

DiscardPacket

Discard the packet and do nothing further.

DiscardPacketSendIcmp

Discard the packet and send an ICMP response.

DiscardPacketSendIcmpNoMulticast

Discard the packet and send an ICMP response if the packet’s destination address was not a multicast address.

Implementations

impl IpParseErrorAction

pub fn should_send_icmp<A: IpAddress>(&self, dst_addr: &A) -> bool

Determines whether or not an ICMP message should be sent.

Returns true if the caller should send an ICMP response. The caller should send an ICMP response if an action is set to DiscardPacketSendIcmp, or if an action is set to DiscardPacketSendIcmpNoMulticast and dst_addr (the destination address of the original packet that lead to a parsing error) is not a multicast address.

pub fn should_send_icmp_to_multicast(&self) -> bool

Determines whether or not an ICMP message should be sent even if the original packet’s destination address is a multicast.

Per RFC 1122 section 3.2.2 and RFC 4443 section 2.4, ICMP messages MUST NOT be sent in response to packets destined to a multicast or broadcast address. However, RFC 4443 section 2.4 includes an exception to this rule if certain criteria are met when parsing IPv6 extension header options. should_send_icmp_to_multicast returns true if the criteria are met. See RFC 4443 section 2.4 for more details about the exception.

Trait Implementations

impl Clone for IpParseErrorAction

fn clone(&self) -> IpParseErrorAction

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for IpParseErrorAction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for IpParseErrorAction

fn eq(&self, other: &IpParseErrorAction) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for IpParseErrorAction

impl StructuralPartialEq for IpParseErrorAction