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use crate::protocol::codec::Decode;
use nom::number;
use nom::IResult;
/******************************************************************************
* Struct
******************************************************************************/
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct MacAddress(pub [u8; 6]);
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum EthType {
LANMIN, // 802.3 Min data length
LANMAX, // 802.3 Max data length
IPv4, // Internet Protocol version 4 (IPv4) [RFC7042]
ARP, // Address Resolution Protocol (ARP) [RFC7042]
WOL, // Wake on LAN
TRILL, // IETF TRILL Protocol [IEEE]
DECnet, // DECnet Phase IV
RARP, // Reverse Address Resolution Protocol (RARP) [RFC903]
AppleTalk, // AppleTalk - EtherTalk [Apple]
AARP, // AppleTalk Address Resolution Protocol (AARP) [Apple]
VLAN, // VLAN-tagged frame (IEEE 802.1Q) and Shortest Path Bridging IEEE 802.1aq[5]
IPX, // IPX [Xerox]
Qnet, // QNX Qnet [QNX Software Systems]
IPv6, // Internet Protocol Version 6 (IPv6) [RFC7042]
PPP, // Point-to-Point Protocol (PPP) [RFC7042]
FlowControl, // Ethernet Flow Control [IEEE 802.3x]
CobraNet, // CobraNet [CobraNet]
MPLSuni, // MPLS Unicast [RFC 3032]
MPLSmulti, // MPLS Multicast [RFC 5332]
PPPoEdiscovery, // PPPOE Discovery Stage [RFC 2516]
PPPoEsession, // PPPoE Session Stage [RFC 2516]
HomePlug, // HomePlug 1.0 MME
EAPOL, // EAP over LAN (IEEE 802.1X)
PROFINET, // PROFINET Protocol
HyperSCSI, // HyperSCSI (SCSI over Ethernet)
ATAOE, // ATA over Ethernet
EtherCAT, // EtherCAT Protocol
QinQ, // Provider Bridging (IEEE 802.1ad) & Shortest Path Bridging IEEE 802.1aq[5]
Powerlink, // Ethernet Powerlink[citation needed]
GOOSE, // GOOSE (Generic Object Oriented Substation event)
GSE, // GSE (Generic Substation Events) Management Services
LLDP, // Link Layer Discovery Protocol (LLDP) [IEEE 802.1AB]
SERCOS, // SERCOS III
HomePlugAV, // HomePlug AV MME[citation needed]
MRP, // Media Redundancy Protocol (IEC62439-2)
MACsec, // MAC security (IEEE 802.1AE)
PBB, // Provider Backbone Bridges (PBB) (IEEE 802.1ah)
PTP, // Precision Time Protocol (PTP) over Ethernet [IEEE 1588]
PRP, // Parallel Redundancy Protocol (PRP)
CFM, // IEEE 802.1ag Connectivity Fault Management (CFM) Protocol / ITU-T Recommendation Y.1731 (OAM)
FCoE, // Fibre Channel over Ethernet (FCoE)
FCoEi, // FCoE Initialization Protocol
RoCE, // RDMA over Converged Ethernet (RoCE)
TTE, // TTEthernet Protocol Control Frame (TTE)
HSR, // High-availability Seamless Redundancy (HSR)
CTP, // Ethernet Configuration Testing Protocol[6]
VLANdouble, // VLAN-tagged (IEEE 802.1Q) frame with double tagging
Other(u16),
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct EthHeader {
pub source_mac: MacAddress,
pub dest_mac: MacAddress,
pub ether_type: EthType,
}
/******************************************************************************
* API
******************************************************************************/
impl From<u16> for EthType {
fn from(raw: u16) -> Self {
match raw {
0x002E => Self::LANMIN,
0x05DC => Self::LANMAX,
0x0800 => Self::IPv4,
0x0806 => Self::ARP,
0x0842 => Self::WOL,
0x22F3 => Self::TRILL,
0x6003 => Self::DECnet,
0x8035 => Self::RARP,
0x809B => Self::AppleTalk,
0x80F3 => Self::AARP,
0x8100 => Self::VLAN,
0x8137 => Self::IPX,
0x8204 => Self::Qnet,
0x86DD => Self::IPv6,
0x880b => Self::PPP,
0x8808 => Self::FlowControl,
0x8819 => Self::CobraNet,
0x8847 => Self::MPLSuni,
0x8848 => Self::MPLSmulti,
0x8863 => Self::PPPoEdiscovery,
0x8864 => Self::PPPoEsession,
0x887B => Self::HomePlug,
0x888E => Self::EAPOL,
0x8892 => Self::PROFINET,
0x889A => Self::HyperSCSI,
0x88A2 => Self::ATAOE,
0x88A4 => Self::EtherCAT,
0x88A8 => Self::QinQ,
0x88AB => Self::Powerlink,
0x88B8 => Self::GOOSE,
0x88B9 => Self::GSE,
0x88CC => Self::LLDP,
0x88CD => Self::SERCOS,
0x88E1 => Self::HomePlugAV,
0x88E3 => Self::MRP,
0x88E5 => Self::MACsec,
0x88E7 => Self::PBB,
0x88F7 => Self::PTP,
0x88FB => Self::PRP,
0x8902 => Self::CFM,
0x8906 => Self::FCoE,
0x8914 => Self::FCoEi,
0x8915 => Self::RoCE,
0x891D => Self::TTE,
0x892F => Self::HSR,
0x9000 => Self::CTP,
0x9100 => Self::VLANdouble,
other => Self::Other(other),
}
}
}
impl Decode for EthType {
type Iterm = EthType;
fn decode(input: &[u8]) -> IResult<&[u8], EthType> {
let (input, ether_type) = number::streaming::be_u16(input)?;
Ok((input, ether_type.into()))
}
}
impl Decode for MacAddress {
type Iterm = MacAddress;
fn decode(input: &[u8]) -> IResult<&[u8], MacAddress> {
let (input, mac_address) = nom::bytes::streaming::take(6u8)(input)?;
Ok((input, MacAddress(<[u8; 6]>::try_from(mac_address).unwrap())))
}
}
impl Decode for EthHeader {
type Iterm = EthHeader;
fn decode(input: &[u8]) -> IResult<&[u8], EthHeader> {
let (input, dest_mac) = MacAddress::decode(input)?;
let (input, source_mac) = MacAddress::decode(input)?;
let (input, ether_type) = EthType::decode(input)?;
Ok((
input,
EthHeader {
source_mac,
dest_mac,
ether_type,
},
))
}
}
/******************************************************************************
* TEST
******************************************************************************/
#[cfg(test)]
mod tests {
use super::{EthHeader, EthType, MacAddress};
use crate::protocol::codec::Decode;
const LAST_SLICE: &'static [u8] = &[0xff];
#[test]
fn ethernet_frame_decode() {
/*
* Ethernet II, Src: Apple_0a:c5:ea (3c:a6:f6:0a:c5:ea), Dst: Charge-A_08:02:be (4c:bc:98:08:02:be)
* Destination: Charge-A_08:02:be (4c:bc:98:08:02:be)
* Address: Charge-A_08:02:be (4c:bc:98:08:02:be)
* .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
* .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
* Source: Apple_0a:c5:ea (3c:a6:f6:0a:c5:ea)
* Address: Apple_0a:c5:ea (3c:a6:f6:0a:c5:ea)
* .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
* .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
* Type: IPv4 (0x0800)
*/
let bytes = [
0x4c, 0xbc, 0x98, 0x08, 0x02, 0xbe, /* Destination Address */
0x3c, 0xa6, 0xf6, 0x0a, 0xc5, 0xea, /* Source Address */
0x08, 0x00, /* Type */
0xff, /* Payload */
];
let expectation = EthHeader {
source_mac: MacAddress([0x3c, 0xa6, 0xf6, 0x0a, 0xc5, 0xea]),
dest_mac: MacAddress([0x4c, 0xbc, 0x98, 0x08, 0x02, 0xbe]),
ether_type: EthType::IPv4,
};
assert_eq!(EthHeader::decode(&bytes), Ok((LAST_SLICE, expectation)));
// example
let result = EthHeader::decode(&bytes);
match result {
Ok((payload, header)) => {
println!("OK: {:?}, payload: {}", header, payload.len());
}
Err(e) => {
println!("ERR: {:?}", e);
}
}
// assert_eq!(1, 0);
}
}
|
