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use std::io;
mod link;
pub use link::ethernet::*;
pub use link::vlan_tagging::*;
mod internet;
pub use internet::ip::*;
mod transport;
pub use transport::udp::*;
pub use transport::tcp::*;
pub use transport::TransportHeader;
mod packet_builder;
pub use packet_builder::*;
mod packet_decoder;
pub use packet_decoder::*;
mod packet_slicing;
pub use packet_slicing::*;
mod packet_filter;
pub use packet_filter::*;
pub trait SerializedSize {
const SERIALIZED_SIZE: usize;
}
#[derive(Debug)]
pub enum ReadError {
IoError(io::Error),
VlanDoubleTaggingUnexpectedOuterTpid(u16),
IpUnsupportedVersion(u8),
Ipv4UnexpectedVersion(u8),
Ipv4HeaderLengthBad(u8),
Ipv6UnexpectedVersion(u8),
Ipv6TooManyHeaderExtensions,
TcpDataOffsetTooSmall(u8),
}
impl From<io::Error> for ReadError {
fn from(err: io::Error) -> ReadError {
ReadError::IoError(err)
}
}
#[derive(Debug)]
pub enum WriteError {
IoError(io::Error),
ValueError(ValueError)
}
impl From<ValueError> for WriteError {
fn from(err: ValueError) -> WriteError {
WriteError::ValueError(err)
}
}
#[derive(Debug, PartialEq, Eq)]
pub enum ValueError {
Ipv4OptionsLengthBad(usize),
Ipv4PayloadAndOptionsLengthTooLarge(usize),
Ipv6PayloadLengthTooLarge(usize),
UdpPayloadLengthTooLarge(usize),
TcpLengthTooLarge(usize),
U8TooLarge{value: u8, max: u8, field: ErrorField},
U16TooLarge{value: u16, max: u16, field: ErrorField},
U32TooLarge{value: u32, max: u32, field: ErrorField}
}
impl From<io::Error> for WriteError {
fn from(err: io::Error) -> WriteError {
WriteError::IoError(err)
}
}
#[derive(Debug, PartialEq, Eq)]
pub enum ErrorField {
Ipv4HeaderLength,
Ipv4Dscp,
Ipv4Ecn,
Ipv4FragmentsOffset,
Ipv6FlowLabel,
VlanTagPriorityCodePoint,
VlanTagVlanId,
TcpDataOffset
}
fn max_check_u8(value: u8, max: u8, field: ErrorField) -> Result<(), ValueError> {
use ValueError::U8TooLarge;
if value <= max {
Ok(())
} else {
Err(U8TooLarge {
value: value,
max: max,
field: field
})
}
}
fn max_check_u16(value: u16, max: u16, field: ErrorField) -> Result<(), ValueError> {
use ValueError::U16TooLarge;
if value <= max {
Ok(())
} else {
Err(U16TooLarge{
value: value,
max: max,
field: field
})
}
}
struct RangeStep {
start: usize,
end: usize,
step: usize
}
impl RangeStep {
fn new(start: usize, end: usize, step: usize) -> RangeStep {
RangeStep {
start: start,
end: end,
step: step
}
}
}
impl Iterator for RangeStep {
type Item = usize;
#[inline]
fn next(&mut self) -> Option<usize> {
if self.start < self.end {
let result = self.start;
self.start = result + self.step;
Some(result)
} else {
None
}
}
}