pub fn send_icmpv4_host_unreachable<B: BufferMut, BC: IcmpBindingsContext, CC: InnerIcmpv4Context<BC> + CounterContext<IcmpTxCounters<Ipv4>>>(
core_ctx: &mut CC,
bindings_ctx: &mut BC,
device: Option<&CC::DeviceId>,
frame_dst: Option<FrameDestination>,
src_ip: SocketIpAddr<Ipv4Addr>,
dst_ip: SocketIpAddr<Ipv4Addr>,
original_packet: B,
header_len: usize,
fragment_type: Ipv4FragmentType,
)
Expand description
Send an ICMP(v4) message in response to receiving a packet destined for an unreachable address.
send_icmpv4_host_unreachable
sends the appropriate ICMP message in
response to receiving an IP packet from src_ip
to dst_ip
, where
dst_ip
is unreachable. In particular, this is an ICMP
“destination unreachable” message with a “host unreachable” code.
original_packet
must be an initial fragment or a complete IP
packet, per RFC 792 Introduction:
Also ICMP messages are only sent about errors in handling fragment zero of fragemented [sic] datagrams.
header_len
is the length of the header including all options.