| use crate::{err::Layer, *}; |
| |
| /// Packet slice split into multiple slices containing |
| /// the different headers & payload. |
| #[derive(Clone, Debug, Eq, PartialEq)] |
| pub struct LaxSlicedPacket<'a> { |
| /// Ethernet II header if present. |
| pub link: Option<LinkSlice<'a>>, |
| |
| /// Single or double vlan headers if present. |
| pub vlan: Option<VlanSlice<'a>>, |
| |
| /// IPv4 or IPv6 header, IP extension headers & payload if present. |
| pub net: Option<LaxNetSlice<'a>>, |
| |
| /// TCP or UDP header & payload if present. |
| pub transport: Option<TransportSlice<'a>>, |
| |
| /// Error that stopped the parsing and the layer on which the stop occurred. |
| pub stop_err: Option<(err::packet::SliceError, Layer)>, |
| } |
| |
| impl<'a> LaxSlicedPacket<'a> { |
| /// Separates a network packet slice into different slices containing the |
| /// headers from the ethernet header downwards with lax length checks and |
| /// non-terminating errors. |
| /// |
| /// # Example |
| /// |
| /// Basic usage: |
| /// |
| ///``` |
| /// # use etherparse::{Ethernet2Header, PacketBuilder}; |
| /// # let builder = PacketBuilder:: |
| /// # ethernet2([1,2,3,4,5,6], //source mac |
| /// # [7,8,9,10,11,12]) //destionation mac |
| /// # .ipv4([192,168,1,1], //source ip |
| /// # [192,168,1,2], //destination ip |
| /// # 20) //time to life |
| /// # .udp(21, //source port |
| /// # 1234); //desitnation port |
| /// # // payload of the udp packet |
| /// # let payload = [1,2,3,4,5,6,7,8]; |
| /// # // get some memory to store the serialized data |
| /// # let mut packet = Vec::<u8>::with_capacity( |
| /// # builder.size(payload.len()) |
| /// # ); |
| /// # builder.write(&mut packet, &payload).unwrap(); |
| /// # |
| /// use etherparse::{ether_type, LaxSlicedPacket, LenSource}; |
| /// |
| /// match LaxSlicedPacket::from_ethernet(&packet) { |
| /// Err(value) => { |
| /// // An error is returned in case the ethernet II header could |
| /// // not be parsed (other errors are stored in the "stop_err" field) |
| /// println!("Err {:?}", value) |
| /// }, |
| /// Ok(value) => { |
| /// if let Some((stop_err, error_layer)) = value.stop_err.as_ref() { |
| /// // error was encountered after parsing the ethernet 2 header |
| /// println!("Error on layer {}: {:?}", error_layer, stop_err); |
| /// } |
| /// |
| /// // parts that could be parsed without error |
| /// println!("link: {:?}", value.link); |
| /// println!("vlan: {:?}", value.vlan); |
| /// println!("net: {:?}", value.net); |
| /// println!("transport: {:?}", value.transport); |
| /// |
| /// // net (ip) & transport (udp or tcp) |
| /// println!("net: {:?}", value.net); |
| /// if let Some(ip_payload) = value.net.as_ref().map(|net| net.ip_payload_ref()).flatten() { |
| /// // the ip payload len_source field can be used to check |
| /// // if the slice length was used as a fallback value |
| /// if ip_payload.len_source == LenSource::Slice { |
| /// println!(" Used slice length as fallback to identify the IP payload"); |
| /// } else { |
| /// println!(" IP payload could correctly be identfied via the length field in the header"); |
| /// } |
| /// } |
| /// println!("transport: {:?}", value.transport); |
| /// } |
| /// } |
| /// |
| /// ``` |
| pub fn from_ethernet(slice: &'a [u8]) -> Result<LaxSlicedPacket<'a>, err::LenError> { |
| LaxSlicedPacketCursor::parse_from_ethernet2(slice) |
| } |
| |
| /// Separates a network packet slice into different slices containing the headers using |
| /// the given `ether_type` number to identify the first header with lax length |
| /// checks and non-terminating errors. |
| /// |
| /// The result is returned as a [`LaxSlicedPacket`] struct. Currently supported |
| /// ether type numbers are: |
| /// |
| /// * `ether_type::IPV4` |
| /// * `ether_type::IPV6` |
| /// * `ether_type::VLAN_TAGGED_FRAME` |
| /// * `ether_type::PROVIDER_BRIDGING` |
| /// * `ether_type::VLAN_DOUBLE_TAGGED_FRAME` |
| /// |
| /// If an unsupported ether type is given the given slice will be set as payload |
| /// and all other fields will be set to `None`. |
| /// |
| /// # Example |
| /// |
| /// Basic usage: |
| /// |
| ///``` |
| /// # use etherparse::{Ethernet2Header, PacketBuilder}; |
| /// # let builder = PacketBuilder:: |
| /// # ethernet2([1,2,3,4,5,6], //source mac |
| /// # [7,8,9,10,11,12]) //destionation mac |
| /// # .ipv4([192,168,1,1], //source ip |
| /// # [192,168,1,2], //destination ip |
| /// # 20) //time to life |
| /// # .udp(21, //source port |
| /// # 1234); //desitnation port |
| /// # // payload of the udp packet |
| /// # let payload = [1,2,3,4,5,6,7,8]; |
| /// # // get some memory to store the serialized data |
| /// # let mut complete_packet = Vec::<u8>::with_capacity( |
| /// # builder.size(payload.len()) |
| /// # ); |
| /// # builder.write(&mut complete_packet, &payload).unwrap(); |
| /// # |
| /// # // skip ethernet 2 header so we can parse from there downwards |
| /// # let packet = &complete_packet[Ethernet2Header::LEN..]; |
| /// # |
| /// use etherparse::{ether_type, LaxSlicedPacket}; |
| /// |
| /// let packet = LaxSlicedPacket::from_ether_type(ether_type::IPV4, packet); |
| /// if let Some((stop_err, error_layer)) = packet.stop_err.as_ref() { |
| /// // in case an error is encountered parsing is stopped |
| /// println!("Error on layer {}: {:?}", error_layer, stop_err); |
| /// } |
| /// |
| /// // parts that could be parsed without error |
| /// println!("link: {:?}", packet.link); |
| /// println!("vlan: {:?}", packet.vlan); |
| /// println!("net: {:?}", packet.net); |
| /// println!("transport: {:?}", packet.transport); |
| /// |
| /// ``` |
| pub fn from_ether_type(ether_type: EtherType, slice: &'a [u8]) -> LaxSlicedPacket<'a> { |
| LaxSlicedPacketCursor::parse_from_ether_type(ether_type, slice) |
| } |
| |
| /// Separates a network packet slice into different slices containing |
| /// the headers from the ip header downwards with lax length checks |
| /// and will still return a result even if an error is encountered in |
| /// a layer (except IP). |
| /// |
| /// This function has two main differences to `SlicedPacket::from_ip`: |
| /// |
| /// * Errors encountered bellow the IpHeader will only stop the parsing and |
| /// return an `Ok` with the successfully parsed parts and the error as optional. |
| /// Only if an unrecoverable error is encountered in the IP header itself an |
| /// `Err` is returned. |
| /// * Length in the IP header & UDP headers are allowed to be inconsistent with the |
| /// given slice length (e.g. data is missing from the slice). In this case it falls |
| /// back to the length of slice. See [`LaxIpSlice::from_slice`] for a detailed |
| /// description of when the slice length is used as a fallback. |
| /// |
| /// The result is returned as a [`SlicedPacket`] struct. This function |
| /// assumes the given data starts with an IPv4 or IPv6 header. |
| /// |
| /// # Examples |
| /// |
| /// Basic usage: |
| /// |
| ///``` |
| /// # use etherparse::{PacketBuilder, IpSlice, LenSource}; |
| /// # let builder = PacketBuilder:: |
| /// # ipv4([192,168,1,1], //source ip |
| /// # [192,168,1,2], //destination ip |
| /// # 20) //time to life |
| /// # .udp(21, //source port |
| /// # 1234); //desitnation port |
| /// # //payload of the udp packet |
| /// # let payload = [1,2,3,4,5,6,7,8]; |
| /// # //get some memory to store the serialized data |
| /// # let mut packet = Vec::<u8>::with_capacity( |
| /// # builder.size(payload.len())); |
| /// # builder.write(&mut packet, &payload).unwrap(); |
| /// use etherparse::LaxSlicedPacket; |
| /// |
| /// match LaxSlicedPacket::from_ip(&packet) { |
| /// Err(value) => { |
| /// // An error is returned in case the ip header could |
| /// // not parsed (other errors are stored in the "stop_err" field) |
| /// println!("Err {:?}", value) |
| /// }, |
| /// Ok(value) => { |
| /// if let Some((stop_err, error_layer)) = value.stop_err.as_ref() { |
| /// // error is encountered after the ip header (stops parsing) |
| /// println!("Error on layer {}: {:?}", error_layer, stop_err); |
| /// } |
| /// |
| /// // link & vlan fields are empty when parsing from ip downwards |
| /// assert_eq!(None, value.link); |
| /// assert_eq!(None, value.vlan); |
| /// |
| /// // net (ip) & transport (udp or tcp) |
| /// println!("net: {:?}", value.net); |
| /// if let Some(ip_payload) = value.net.as_ref().map(|net| net.ip_payload_ref()).flatten() { |
| /// // the ip payload len_source field can be used to check |
| /// // if the slice length was used as a fallback value |
| /// if ip_payload.len_source == LenSource::Slice { |
| /// println!(" Used slice length as fallback to identify the IP payload"); |
| /// } else { |
| /// println!(" IP payload could correctly be identfied via the length field in the header"); |
| /// } |
| /// } |
| /// println!("transport: {:?}", value.transport); |
| /// } |
| /// } |
| /// ``` |
| pub fn from_ip(slice: &'a [u8]) -> Result<LaxSlicedPacket<'a>, err::ip::LaxHeaderSliceError> { |
| LaxSlicedPacketCursor::parse_from_ip(slice) |
| } |
| |
| /// Returns the last ether payload of the packet (if one is present). |
| /// |
| /// If VLAN header is present the payload after the most inner VLAN |
| /// header is returned and if there is no VLAN header is present in the |
| /// link field is returned. |
| pub fn ether_payload(&self) -> Option<EtherPayloadSlice<'a>> { |
| if let Some(vlan) = self.vlan.as_ref() { |
| match vlan { |
| VlanSlice::SingleVlan(s) => Some(s.payload()), |
| VlanSlice::DoubleVlan(s) => Some(s.payload()), |
| } |
| } else if let Some(link) = self.link.as_ref() { |
| match link { |
| LinkSlice::Ethernet2(e) => Some(e.payload()), |
| LinkSlice::LinuxSll(e) => match e.protocol_type() { |
| LinuxSllProtocolType::EtherType(_) |
| | LinuxSllProtocolType::LinuxNonstandardEtherType(_) => { |
| Some(EtherPayloadSlice::try_from(e.payload()).ok()?) |
| } |
| _ => None, |
| }, |
| LinkSlice::EtherPayload(e) => Some(e.clone()), |
| LinkSlice::LinuxSllPayload(e) => match e.protocol_type { |
| LinuxSllProtocolType::EtherType(_) |
| | LinuxSllProtocolType::LinuxNonstandardEtherType(_) => { |
| Some(EtherPayloadSlice::try_from(e.clone()).ok()?) |
| } |
| _ => None, |
| }, |
| } |
| } else { |
| None |
| } |
| } |
| |
| /// Return the IP payload after the the IP header and the IP extension |
| /// headers (if one is present). |
| pub fn ip_payload(&self) -> Option<&LaxIpPayloadSlice<'a>> { |
| if let Some(net) = self.net.as_ref() { |
| use LaxNetSlice::*; |
| match net { |
| Ipv4(v) => Some(v.payload()), |
| Ipv6(v) => Some(v.payload()), |
| } |
| } else { |
| None |
| } |
| } |
| } |
| |
| #[cfg(test)] |
| mod test { |
| use super::*; |
| use crate::err::{packet::SliceError, LenError}; |
| use crate::test_packet::TestPacket; |
| |
| const VLAN_ETHER_TYPES: [EtherType; 3] = [ |
| ether_type::VLAN_TAGGED_FRAME, |
| ether_type::PROVIDER_BRIDGING, |
| ether_type::VLAN_DOUBLE_TAGGED_FRAME, |
| ]; |
| |
| #[test] |
| fn clone_eq() { |
| let header = LaxSlicedPacket { |
| link: None, |
| vlan: None, |
| net: None, |
| transport: None, |
| stop_err: None, |
| }; |
| assert_eq!(header.clone(), header); |
| } |
| |
| #[test] |
| fn debug() { |
| use alloc::format; |
| let header = LaxSlicedPacket { |
| link: None, |
| vlan: None, |
| net: None, |
| transport: None, |
| stop_err: None, |
| }; |
| assert_eq!( |
| format!("{:?}", header), |
| format!( |
| "LaxSlicedPacket {{ link: {:?}, vlan: {:?}, net: {:?}, transport: {:?}, stop_err: {:?} }}", |
| header.link, header.vlan, header.net, header.transport, header.stop_err |
| ) |
| ); |
| } |
| |
| #[test] |
| fn ether_payload() { |
| use alloc::vec::*; |
| |
| // no content |
| assert_eq!( |
| LaxSlicedPacket { |
| link: None, |
| vlan: None, |
| net: None, |
| transport: None, |
| stop_err: None |
| } |
| .ether_payload(), |
| None |
| ); |
| |
| // only ethernet header II |
| { |
| let payload = [1, 2, 3, 4]; |
| let mut buf = Vec::with_capacity(Ethernet2Header::LEN + 4); |
| buf.extend_from_slice( |
| &Ethernet2Header { |
| ether_type: EtherType::WAKE_ON_LAN, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice(&payload); |
| assert_eq!( |
| LaxSlicedPacket::from_ethernet(&buf) |
| .unwrap() |
| .ether_payload(), |
| Some(EtherPayloadSlice { |
| ether_type: EtherType::WAKE_ON_LAN, |
| payload: &payload |
| }) |
| ); |
| } |
| |
| // ether type payload |
| { |
| let payload = [1, 2, 3, 4]; |
| assert_eq!( |
| LaxSlicedPacket { |
| link: Some(LinkSlice::EtherPayload(EtherPayloadSlice { |
| ether_type: EtherType::WAKE_ON_LAN, |
| payload: &payload |
| })), |
| vlan: None, |
| net: None, |
| transport: None, |
| stop_err: None, |
| } |
| .ether_payload(), |
| Some(EtherPayloadSlice { |
| ether_type: EtherType::WAKE_ON_LAN, |
| payload: &payload |
| }) |
| ); |
| } |
| |
| // single vlan header |
| { |
| let payload = [1, 2, 3, 4]; |
| let mut buf = Vec::with_capacity(Ethernet2Header::LEN + SingleVlanHeader::LEN + 4); |
| buf.extend_from_slice( |
| &Ethernet2Header { |
| ether_type: EtherType::VLAN_TAGGED_FRAME, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice( |
| &SingleVlanHeader { |
| ether_type: EtherType::WAKE_ON_LAN, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice(&payload); |
| assert_eq!( |
| LaxSlicedPacket::from_ethernet(&buf) |
| .unwrap() |
| .ether_payload(), |
| Some(EtherPayloadSlice { |
| ether_type: EtherType::WAKE_ON_LAN, |
| payload: &payload |
| }) |
| ); |
| } |
| |
| // double vlan header |
| { |
| let payload = [1, 2, 3, 4]; |
| let mut buf = Vec::with_capacity(Ethernet2Header::LEN + SingleVlanHeader::LEN * 2 + 4); |
| buf.extend_from_slice( |
| &Ethernet2Header { |
| ether_type: EtherType::VLAN_DOUBLE_TAGGED_FRAME, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice( |
| &SingleVlanHeader { |
| ether_type: EtherType::VLAN_TAGGED_FRAME, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice( |
| &SingleVlanHeader { |
| ether_type: EtherType::WAKE_ON_LAN, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice(&payload); |
| assert_eq!( |
| LaxSlicedPacket::from_ethernet(&buf) |
| .unwrap() |
| .ether_payload(), |
| Some(EtherPayloadSlice { |
| ether_type: EtherType::WAKE_ON_LAN, |
| payload: &payload |
| }) |
| ); |
| } |
| } |
| |
| #[test] |
| fn ip_payload() { |
| use alloc::vec::*; |
| |
| // no content |
| assert_eq!( |
| LaxSlicedPacket { |
| link: None, |
| vlan: None, |
| net: None, |
| transport: None, |
| stop_err: None, |
| } |
| .ip_payload(), |
| None |
| ); |
| |
| // ipv4 |
| { |
| let payload = [1, 2, 3, 4]; |
| let mut buf = Vec::with_capacity(Ipv4Header::MIN_LEN + 4); |
| buf.extend_from_slice( |
| &Ipv4Header { |
| protocol: IpNumber::ARIS, |
| total_len: Ipv4Header::MIN_LEN_U16 + 4, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice(&payload); |
| assert_eq!( |
| LaxSlicedPacket::from_ip(&buf).unwrap().ip_payload(), |
| Some(&LaxIpPayloadSlice { |
| payload: &payload, |
| ip_number: IpNumber::ARIS, |
| fragmented: false, |
| len_source: LenSource::Ipv4HeaderTotalLen, |
| incomplete: false, |
| }) |
| ); |
| } |
| |
| // ipv6 |
| { |
| let payload = [1, 2, 3, 4]; |
| let mut buf = Vec::with_capacity(Ipv6Header::LEN + 4); |
| buf.extend_from_slice( |
| &Ipv6Header { |
| payload_length: 4, |
| next_header: IpNumber::ARGUS, |
| ..Default::default() |
| } |
| .to_bytes(), |
| ); |
| buf.extend_from_slice(&payload); |
| assert_eq!( |
| LaxSlicedPacket::from_ip(&buf).unwrap().ip_payload(), |
| Some(&LaxIpPayloadSlice { |
| payload: &payload, |
| ip_number: IpNumber::ARGUS, |
| fragmented: false, |
| len_source: LenSource::Ipv6HeaderPayloadLen, |
| incomplete: false, |
| }) |
| ); |
| } |
| } |
| |
| #[test] |
| fn from_x_slice() { |
| // no eth |
| from_x_slice_vlan_variants(&TestPacket { |
| link: None, |
| vlan: None, |
| net: None, |
| transport: None, |
| }); |
| |
| // eth |
| { |
| let eth = Ethernet2Header { |
| source: [1, 2, 3, 4, 5, 6], |
| destination: [1, 2, 3, 4, 5, 6], |
| ether_type: 0.into(), |
| }; |
| let test = TestPacket { |
| link: Some(LinkHeader::Ethernet2(eth.clone())), |
| vlan: None, |
| net: None, |
| transport: None, |
| }; |
| |
| // ok ethernet header (with unknown next) |
| from_x_slice_vlan_variants(&test); |
| |
| // eth len error |
| { |
| let data = test.to_vec(&[]); |
| for len in 0..data.len() { |
| assert_test_result(&test, &[], &data[..len], None, None); |
| } |
| } |
| } |
| |
| // unknown ether_type |
| { |
| let payload = [1, 2, 3, 4]; |
| let actual = LaxSlicedPacket::from_ether_type(0.into(), &payload); |
| assert_eq!( |
| actual.link, |
| Some(LinkSlice::EtherPayload(EtherPayloadSlice { |
| ether_type: 0.into(), |
| payload: &payload |
| })) |
| ); |
| assert_eq!(None, actual.vlan); |
| assert_eq!(None, actual.net); |
| assert_eq!(None, actual.transport); |
| assert_eq!(None, actual.stop_err); |
| } |
| } |
| |
| fn from_x_slice_vlan_variants(base: &TestPacket) { |
| // none |
| from_x_slice_ip_variants(base); |
| |
| // single vlan header |
| { |
| let single = SingleVlanHeader { |
| pcp: 1.try_into().unwrap(), |
| drop_eligible_indicator: false, |
| vlan_id: 2.try_into().unwrap(), |
| ether_type: 3.into(), |
| }; |
| |
| for vlan_ether_type in VLAN_ETHER_TYPES { |
| let mut test = base.clone(); |
| test.set_ether_type(vlan_ether_type); |
| test.vlan = Some(VlanHeader::Single(single.clone())); |
| |
| // ok vlan header |
| from_x_slice_ip_variants(&test); |
| |
| // len error |
| { |
| let data = test.to_vec(&[]); |
| for len in 0..single.header_len() { |
| let base_len = test.len(&[]) - single.header_len(); |
| |
| let err = LenError { |
| required_len: single.header_len(), |
| len, |
| len_source: LenSource::Slice, |
| layer: Layer::VlanHeader, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::VlanHeader)), |
| ); |
| } |
| } |
| } |
| } |
| |
| // double vlan header |
| for outer_vlan_ether_type in VLAN_ETHER_TYPES { |
| for inner_vlan_ether_type in VLAN_ETHER_TYPES { |
| let double = DoubleVlanHeader { |
| outer: SingleVlanHeader { |
| pcp: 1.try_into().unwrap(), |
| drop_eligible_indicator: false, |
| vlan_id: 2.try_into().unwrap(), |
| ether_type: inner_vlan_ether_type, |
| }, |
| inner: SingleVlanHeader { |
| pcp: 1.try_into().unwrap(), |
| drop_eligible_indicator: false, |
| vlan_id: 2.try_into().unwrap(), |
| ether_type: 3.into(), |
| }, |
| }; |
| let mut test = base.clone(); |
| test.set_ether_type(outer_vlan_ether_type); |
| test.vlan = Some(VlanHeader::Double(double.clone())); |
| |
| // ok double vlan header |
| from_x_slice_ip_variants(&test); |
| |
| // len error |
| { |
| let data = test.to_vec(&[]); |
| for len in 0..SingleVlanHeader::LEN { |
| let base_len = test.len(&[]) - SingleVlanHeader::LEN; |
| |
| let err = LenError { |
| required_len: SingleVlanHeader::LEN, |
| len, |
| len_source: LenSource::Slice, |
| layer: Layer::VlanHeader, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::VlanHeader)), |
| ); |
| } |
| } |
| } |
| } |
| } |
| |
| fn from_x_slice_ip_variants(base: &TestPacket) { |
| // none |
| from_x_slice_transport_variants(base); |
| |
| // ipv4 |
| for fragmented in [false, true] { |
| let ipv4 = { |
| let mut ipv4 = |
| Ipv4Header::new(0, 1, 2.into(), [3, 4, 5, 6], [7, 8, 9, 10]).unwrap(); |
| ipv4.more_fragments = fragmented; |
| ipv4 |
| }; |
| |
| { |
| let mut test = base.clone(); |
| test.set_ether_type(ether_type::IPV4); |
| test.net = Some(NetHeaders::Ipv4(ipv4.clone(), Default::default())); |
| test.set_payload_len(0); |
| |
| // ok ipv4 |
| from_x_slice_transport_variants(&test); |
| |
| // ipv4 len error |
| { |
| let data = test.to_vec(&[]); |
| for len in 0..ipv4.header_len() { |
| let base_len = test.len(&[]) - ipv4.header_len(); |
| |
| let err = LenError { |
| required_len: if len < 1 { 1 } else { ipv4.header_len() }, |
| len, |
| len_source: LenSource::Slice, |
| layer: if len < 1 { |
| Layer::IpHeader |
| } else { |
| Layer::Ipv4Header |
| }, |
| layer_start_offset: base_len, |
| }; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| Some(err::ip::LaxHeaderSliceError::Len(err.clone())), |
| Some((SliceError::Len(err.clone()), Layer::IpHeader)), |
| ); |
| } |
| } |
| |
| // ipv4 content error (ihl length too small) |
| { |
| use err::ip::HeaderError::*; |
| |
| let mut data = test.to_vec(&[]); |
| let ipv4_offset = data.len() - ipv4.header_len(); |
| |
| // set the ihl to 0 to trigger a content error |
| data[ipv4_offset] = 0b1111_0000 & data[ipv4_offset]; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| Some(err::ip::LaxHeaderSliceError::Content( |
| Ipv4HeaderLengthSmallerThanHeader { ihl: 0 }, |
| )), |
| Some(( |
| SliceError::Ip(Ipv4HeaderLengthSmallerThanHeader { ihl: 0 }), |
| Layer::IpHeader, |
| )), |
| ); |
| } |
| |
| // ipv 4total length too small (does not change the output) |
| { |
| let mut data = test.to_vec(&[]); |
| let ipv4_offset = data.len() - ipv4.header_len(); |
| |
| // set the total length to 0 to trigger a content error |
| data[ipv4_offset + 2] = 0; |
| data[ipv4_offset + 3] = 0; |
| |
| let mut mod_test = test.clone(); |
| mod_test.net = Some({ |
| let (h, e) = test.net.as_ref().map(|v| v.ipv4_ref()).flatten().unwrap(); |
| let mut ipv4 = h.clone(); |
| ipv4.total_len = 0; |
| NetHeaders::Ipv4(ipv4, e.clone()) |
| }); |
| |
| assert_test_result(&mod_test, &[], &data, None, None); |
| } |
| } |
| |
| // ipv4 extension content error |
| { |
| let auth = IpAuthHeader::new(0.into(), 1, 2, &[]).unwrap(); |
| |
| let mut test = base.clone(); |
| test.set_ether_type(ether_type::IPV4); |
| test.net = Some(NetHeaders::Ipv4( |
| { |
| let mut ipv4 = ipv4.clone(); |
| ipv4.protocol = ip_number::AUTH; |
| ipv4 |
| }, |
| Ipv4Extensions { |
| auth: Some(auth.clone()), |
| }, |
| )); |
| test.set_payload_len(0); |
| |
| // ok ipv4 & extension |
| from_x_slice_transport_variants(&test); |
| |
| // ipv4 extension len error |
| for len in 0..auth.header_len() { |
| // set payload length |
| let mut test = test.clone(); |
| test.set_payload_le_from_ip_on( |
| -1 * (auth.header_len() as isize) + (len as isize), |
| ); |
| |
| let data = test.to_vec(&[]); |
| let base_len = test.len(&[]) - auth.header_len(); |
| |
| let err = LenError { |
| required_len: auth.header_len(), |
| len, |
| len_source: LenSource::Ipv4HeaderTotalLen, |
| layer: Layer::IpAuthHeader, |
| layer_start_offset: base_len, |
| }; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| None, |
| Some((SliceError::Len(err.clone()), Layer::IpAuthHeader)), |
| ); |
| } |
| |
| // ipv4 extension content error |
| { |
| let mut data = test.to_vec(&[]); |
| let auth_offset = data.len() - auth.header_len(); |
| |
| // set the icv len too smaller then allowed |
| data[auth_offset + 1] = 0; |
| |
| // expect an error |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| None, |
| Some(( |
| SliceError::Ipv4Exts(err::ip_auth::HeaderError::ZeroPayloadLen), |
| Layer::IpAuthHeader, |
| )), |
| ); |
| } |
| } |
| } |
| |
| // ipv6 |
| { |
| let ipv6 = Ipv6Header { |
| traffic_class: 0, |
| flow_label: 1.try_into().unwrap(), |
| payload_length: 2, |
| next_header: 3.into(), |
| hop_limit: 4, |
| source: [0; 16], |
| destination: [0; 16], |
| }; |
| |
| // ipv6 header only |
| { |
| let mut test = base.clone(); |
| test.set_ether_type(ether_type::IPV6); |
| test.net = Some(NetHeaders::Ipv6(ipv6.clone(), Default::default())); |
| test.set_payload_len(0); |
| |
| // ok ipv6 |
| from_x_slice_transport_variants(&test); |
| |
| // header len ipv6 |
| { |
| let data = test.to_vec(&[]); |
| for len in 0..ipv6.header_len() { |
| let base_len = test.len(&[]) - ipv6.header_len(); |
| |
| let err = err::LenError { |
| required_len: if len < 1 { 1 } else { ipv6.header_len() }, |
| len, |
| len_source: LenSource::Slice, |
| layer: if len < 1 { |
| Layer::IpHeader |
| } else { |
| Layer::Ipv6Header |
| }, |
| layer_start_offset: base_len, |
| }; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| Some(err::ip::LaxHeaderSliceError::Len(err.clone())), |
| Some(( |
| SliceError::Len({ |
| if len < 1 { |
| let mut err = err.clone(); |
| err.required_len = 1; |
| err.layer = Layer::IpHeader; |
| err |
| } else { |
| err.clone() |
| } |
| }), |
| Layer::IpHeader, |
| )), |
| ); |
| } |
| } |
| |
| // content error ipv6 |
| { |
| use err::ip::{HeaderError::*, LaxHeaderSliceError::Content}; |
| |
| let mut data = test.to_vec(&[]); |
| |
| // inject an invalid ip version |
| let base_len = data.len() - ipv6.header_len(); |
| data[base_len] = data[base_len] & 0b0000_1111; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| Some(Content(UnsupportedIpVersion { version_number: 0 })), |
| Some(( |
| SliceError::Ip(UnsupportedIpVersion { version_number: 0 }), |
| Layer::IpHeader, |
| )), |
| ); |
| } |
| } |
| |
| // ipv6 + extension |
| for fragment in [false, true] { |
| let auth = IpAuthHeader::new(ip_number::GGP, 1, 2, &[]).unwrap(); |
| let frag = Ipv6FragmentHeader { |
| next_header: ip_number::AUTH, |
| fragment_offset: 0.try_into().unwrap(), |
| more_fragments: fragment, |
| identification: 3, |
| }; |
| |
| let mut test = base.clone(); |
| test.set_ether_type(ether_type::IPV6); |
| test.net = Some(NetHeaders::Ipv6( |
| { |
| let mut ipv6 = ipv6.clone(); |
| ipv6.next_header = ip_number::IPV6_FRAG; |
| ipv6 |
| }, |
| { |
| let mut exts: Ipv6Extensions = Default::default(); |
| exts.fragment = Some(frag.clone()); |
| exts.auth = Some(auth.clone()); |
| exts |
| }, |
| )); |
| test.set_payload_len(0); |
| |
| // ok ipv6 & extensions |
| from_x_slice_transport_variants(&test); |
| |
| // ipv6 extension len error |
| for len in 0..auth.header_len() { |
| // set payload length |
| let mut test = test.clone(); |
| test.set_payload_le_from_ip_on( |
| -1 * (auth.header_len() as isize) + (len as isize), |
| ); |
| |
| let data = test.to_vec(&[]); |
| let base_len = test.len(&[]) - auth.header_len(); |
| |
| let err = LenError { |
| required_len: auth.header_len(), |
| len, |
| len_source: LenSource::Ipv6HeaderPayloadLen, |
| layer: Layer::IpAuthHeader, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::IpAuthHeader)), |
| ); |
| } |
| |
| // ipv6 extension content error (auth) |
| { |
| let mut data = test.to_vec(&[]); |
| let auth_offset = data.len() - auth.header_len(); |
| // set the icv len too smaller then allowed |
| data[auth_offset + 1] = 0; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| None, |
| Some(( |
| SliceError::Ipv6Exts(err::ipv6_exts::HeaderError::IpAuth( |
| err::ip_auth::HeaderError::ZeroPayloadLen, |
| )), |
| Layer::IpAuthHeader, |
| )), |
| ); |
| } |
| |
| // ipv6 extension content error (hop by hop not at start) |
| { |
| let mut data = test.to_vec(&[]); |
| let auth_offset = data.len() - auth.header_len(); |
| |
| // set the next header to be a hop-by-hop header to trigger a "not at start error" |
| data[auth_offset] = 0; |
| |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| None, |
| Some(( |
| SliceError::Ipv6Exts(err::ipv6_exts::HeaderError::HopByHopNotAtStart), |
| Layer::Ipv6HopByHopHeader, |
| )), |
| ); |
| } |
| } |
| } |
| } |
| |
| fn from_x_slice_transport_variants(base: &TestPacket) { |
| // none |
| from_x_slice_assert_ok(base); |
| |
| // transport can only be set if ip is present |
| if let Some(ip) = &base.net { |
| // udp |
| { |
| let udp = UdpHeader { |
| source_port: 1, |
| destination_port: 2, |
| length: 3, |
| checksum: 4, |
| }; |
| let mut test = base.clone(); |
| test.net = Some({ |
| let mut ip = match ip { |
| NetHeaders::Ipv4(h, e) => IpHeaders::Ipv4(h.clone(), e.clone()), |
| NetHeaders::Ipv6(h, e) => IpHeaders::Ipv6(h.clone(), e.clone()), |
| }; |
| ip.set_next_headers(ip_number::UDP); |
| ip.into() |
| }); |
| test.transport = Some(TransportHeader::Udp(udp.clone())); |
| test.set_payload_len(0); |
| |
| // ok decode |
| from_x_slice_assert_ok(&test); |
| |
| // length error |
| if false == test.is_ip_payload_fragmented() { |
| for len in 0..udp.header_len() { |
| // build new test packet |
| let mut test = test.clone(); |
| |
| // set payload length |
| test.set_payload_le_from_ip_on(len as isize); |
| |
| // generate data |
| let data = test.to_vec(&[]); |
| |
| let base_len = test.len(&[]) - udp.header_len(); |
| let err = LenError { |
| required_len: udp.header_len(), |
| len, |
| len_source: match test.net.as_ref().unwrap() { |
| NetHeaders::Ipv4(_, _) => LenSource::Ipv4HeaderTotalLen, |
| NetHeaders::Ipv6(_, _) => LenSource::Ipv6HeaderPayloadLen, |
| }, |
| layer: Layer::UdpHeader, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::UdpHeader)), |
| ); |
| } |
| } |
| } |
| |
| // tcp |
| { |
| let tcp = TcpHeader::new(1, 2, 3, 4); |
| let mut test = base.clone(); |
| test.net = Some({ |
| let mut ip = match ip { |
| NetHeaders::Ipv4(h, e) => IpHeaders::Ipv4(h.clone(), e.clone()), |
| NetHeaders::Ipv6(h, e) => IpHeaders::Ipv6(h.clone(), e.clone()), |
| }; |
| ip.set_next_headers(ip_number::TCP); |
| ip.into() |
| }); |
| test.transport = Some(TransportHeader::Tcp(tcp.clone())); |
| test.set_payload_len(0); |
| |
| // ok decode |
| from_x_slice_assert_ok(&test); |
| |
| // error can only occur if ip does not fragment the packet |
| if false == test.is_ip_payload_fragmented() { |
| // length error |
| { |
| for len in 0..(tcp.header_len() as usize) { |
| // set payload length |
| let mut test = test.clone(); |
| test.set_payload_le_from_ip_on(len as isize); |
| |
| let data = test.to_vec(&[]); |
| let base_len = test.len(&[]) - (tcp.header_len() as usize); |
| |
| let err = LenError { |
| required_len: tcp.header_len() as usize, |
| len, |
| len_source: match test.net.as_ref().unwrap() { |
| NetHeaders::Ipv4(_, _) => LenSource::Ipv4HeaderTotalLen, |
| NetHeaders::Ipv6(_, _) => LenSource::Ipv6HeaderPayloadLen, |
| }, |
| layer: Layer::TcpHeader, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::TcpHeader)), |
| ); |
| } |
| } |
| |
| // content error |
| { |
| let mut data = test.to_vec(&[]); |
| let base_len = test.len(&[]) - (tcp.header_len() as usize); |
| |
| // set data offset to 0 to trigger an error |
| data[base_len + 12] = data[base_len + 12] & 0b0000_1111; |
| |
| let err = err::tcp::HeaderError::DataOffsetTooSmall { data_offset: 0 }; |
| assert_test_result( |
| &test, |
| &[], |
| &data, |
| None, |
| Some((SliceError::Tcp(err.clone()), Layer::TcpHeader)), |
| ); |
| } |
| } |
| } |
| |
| // icmpv4 |
| { |
| let icmpv4 = |
| Icmpv4Header::new(Icmpv4Type::EchoReply(IcmpEchoHeader { id: 1, seq: 2 })); |
| let mut test = base.clone(); |
| test.net = Some({ |
| let mut ip = match ip { |
| NetHeaders::Ipv4(h, e) => IpHeaders::Ipv4(h.clone(), e.clone()), |
| NetHeaders::Ipv6(h, e) => IpHeaders::Ipv6(h.clone(), e.clone()), |
| }; |
| ip.set_next_headers(ip_number::ICMP); |
| ip.into() |
| }); |
| test.transport = Some(TransportHeader::Icmpv4(icmpv4.clone())); |
| test.set_payload_len(0); |
| |
| // ok decode |
| from_x_slice_assert_ok(&test); |
| |
| // length error |
| if false == test.is_ip_payload_fragmented() { |
| for len in 0..icmpv4.header_len() { |
| // set payload length |
| let mut test = test.clone(); |
| test.set_payload_le_from_ip_on(len as isize); |
| |
| let data = test.to_vec(&[]); |
| let base_len = test.len(&[]) - icmpv4.header_len(); |
| |
| let err = LenError { |
| required_len: icmpv4.header_len(), |
| len, |
| len_source: match test.net.as_ref().unwrap() { |
| NetHeaders::Ipv4(_, _) => LenSource::Ipv4HeaderTotalLen, |
| NetHeaders::Ipv6(_, _) => LenSource::Ipv6HeaderPayloadLen, |
| }, |
| layer: Layer::Icmpv4, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::Icmpv4)), |
| ); |
| } |
| } |
| } |
| |
| // icmpv6 |
| { |
| let icmpv6 = |
| Icmpv6Header::new(Icmpv6Type::EchoReply(IcmpEchoHeader { id: 1, seq: 2 })); |
| let mut test = base.clone(); |
| test.net = Some({ |
| let mut ip = match ip { |
| NetHeaders::Ipv4(h, e) => IpHeaders::Ipv4(h.clone(), e.clone()), |
| NetHeaders::Ipv6(h, e) => IpHeaders::Ipv6(h.clone(), e.clone()), |
| }; |
| ip.set_next_headers(ip_number::IPV6_ICMP); |
| ip.into() |
| }); |
| test.transport = Some(TransportHeader::Icmpv6(icmpv6.clone())); |
| test.set_payload_len(0); |
| |
| // ok decode |
| from_x_slice_assert_ok(&test); |
| |
| // length error |
| if false == test.is_ip_payload_fragmented() { |
| for len in 0..icmpv6.header_len() { |
| // set payload length |
| let mut test = test.clone(); |
| test.set_payload_le_from_ip_on(len as isize); |
| |
| let data = test.to_vec(&[]); |
| let base_len = test.len(&[]) - icmpv6.header_len(); |
| |
| let err = LenError { |
| required_len: icmpv6.header_len(), |
| len, |
| len_source: match test.net.as_ref().unwrap() { |
| NetHeaders::Ipv4(_, _) => LenSource::Ipv4HeaderTotalLen, |
| NetHeaders::Ipv6(_, _) => LenSource::Ipv6HeaderPayloadLen, |
| }, |
| layer: Layer::Icmpv6, |
| layer_start_offset: base_len, |
| }; |
| assert_test_result( |
| &test, |
| &[], |
| &data[..base_len + len], |
| None, |
| Some((SliceError::Len(err.clone()), Layer::Icmpv6)), |
| ); |
| } |
| } |
| } |
| } |
| } |
| |
| fn from_x_slice_assert_ok(test_base: &TestPacket) { |
| // setup payload |
| let payload = [1, 2, 3, 4]; |
| |
| // set length fields in ip headers |
| let test = { |
| let mut test = test_base.clone(); |
| test.set_payload_len(payload.len()); |
| test |
| }; |
| |
| // write data |
| let data = test.to_vec(&payload); |
| assert_test_result(&test, &payload, &data, None, None); |
| } |
| |
| /// Check that the given output & errors (if present) are generated based on the given |
| /// input. |
| fn assert_test_result( |
| test: &TestPacket, |
| expected_payload: &[u8], |
| data: &[u8], |
| expected_ip_err: Option<err::ip::LaxHeaderSliceError>, |
| expected_stop_err: Option<(SliceError, Layer)>, |
| ) { |
| fn compare_vlan(test: &TestPacket, data: &[u8], actual: &LaxSlicedPacket) { |
| let vlan_offset = if let Some(e) = test.link.as_ref() { |
| e.header_len() |
| } else { |
| 0 |
| }; |
| match test.vlan.as_ref() { |
| Some(VlanHeader::Double(d)) => { |
| if data.len() >= vlan_offset + DoubleVlanHeader::LEN { |
| assert_eq!(test.vlan, actual.vlan.as_ref().map(|v| v.to_header())); |
| } else if data.len() >= vlan_offset + SingleVlanHeader::LEN { |
| assert_eq!( |
| Some(VlanHeader::Single(d.outer.clone())), |
| actual.vlan.as_ref().map(|v| v.to_header()) |
| ); |
| } else { |
| assert_eq!(None, actual.vlan); |
| } |
| } |
| Some(VlanHeader::Single(s)) => { |
| if data.len() >= vlan_offset + SingleVlanHeader::LEN { |
| assert_eq!( |
| Some(VlanHeader::Single(s.clone())), |
| actual.vlan.as_ref().map(|v| v.to_header()) |
| ); |
| } else { |
| assert_eq!(None, actual.vlan); |
| } |
| } |
| None => { |
| assert_eq!(None, actual.vlan); |
| } |
| } |
| } |
| |
| fn compare_ip(test: &TestPacket, actual: &LaxSlicedPacket) { |
| assert_eq!( |
| test.net, |
| actual.net.as_ref().map(|s| -> NetHeaders { |
| match s { |
| LaxNetSlice::Ipv4(ipv4) => NetHeaders::Ipv4( |
| ipv4.header().to_header(), |
| ipv4.extensions().to_header(), |
| ), |
| LaxNetSlice::Ipv6(ipv6) => NetHeaders::Ipv6( |
| ipv6.header().to_header(), |
| Ipv6Extensions::from_slice( |
| ipv6.header().next_header(), |
| ipv6.extensions().slice(), |
| ) |
| .unwrap() |
| .0, |
| ), |
| } |
| }) |
| ); |
| } |
| |
| fn compare_ip_header_only(test: &TestPacket, actual: &LaxSlicedPacket) { |
| assert_eq!( |
| test.net.as_ref().map(|s| -> NetHeaders { |
| match s { |
| NetHeaders::Ipv4(h, _) => NetHeaders::Ipv4(h.clone(), Default::default()), |
| NetHeaders::Ipv6(h, _) => NetHeaders::Ipv6(h.clone(), Default::default()), |
| } |
| }), |
| actual.net.as_ref().map(|s| -> NetHeaders { |
| match s { |
| LaxNetSlice::Ipv4(ipv4) => { |
| NetHeaders::Ipv4(ipv4.header().to_header(), Default::default()) |
| } |
| LaxNetSlice::Ipv6(ipv6) => { |
| NetHeaders::Ipv6(ipv6.header().to_header(), Default::default()) |
| } |
| } |
| }) |
| ); |
| } |
| |
| fn compare_transport( |
| test: &TestPacket, |
| is_fragmented: bool, |
| expected_payload: &[u8], |
| actual: &LaxSlicedPacket, |
| ) { |
| if is_fragmented { |
| assert_eq!(actual.transport, None); |
| } else { |
| use TransportHeader as H; |
| use TransportSlice as S; |
| match &actual.transport { |
| Some(S::Icmpv4(icmpv4)) => { |
| assert_eq!(&test.transport, &Some(H::Icmpv4(icmpv4.header()))); |
| assert_eq!(icmpv4.payload(), expected_payload); |
| } |
| Some(S::Icmpv6(icmpv6)) => { |
| assert_eq!(&test.transport, &Some(H::Icmpv6(icmpv6.header()))); |
| assert_eq!(icmpv6.payload(), expected_payload); |
| } |
| Some(S::Udp(s)) => { |
| assert_eq!(&test.transport, &Some(H::Udp(s.to_header()))); |
| } |
| Some(S::Tcp(s)) => { |
| assert_eq!(&test.transport, &Some(H::Tcp(s.to_header()))); |
| } |
| None => { |
| assert_eq!(&test.transport, &None); |
| } |
| } |
| } |
| } |
| |
| // from_ethernet_slice |
| if test.link.is_some() { |
| if data.len() < Ethernet2Header::LEN { |
| assert_eq!( |
| LenError { |
| required_len: Ethernet2Header::LEN, |
| len: data.len(), |
| len_source: LenSource::Slice, |
| layer: Layer::Ethernet2Header, |
| layer_start_offset: 0 |
| }, |
| LaxSlicedPacket::from_ethernet(&data).unwrap_err() |
| ); |
| } else { |
| let actual = LaxSlicedPacket::from_ethernet(&data).unwrap(); |
| assert_eq!(actual.stop_err, expected_stop_err); |
| match expected_stop_err.as_ref().map(|v| v.1) { |
| None => { |
| assert_eq!( |
| test.link, |
| actual.link.as_ref().map(|v| v.to_header()).flatten() |
| ); |
| compare_vlan(test, data, &actual); |
| compare_ip(test, &actual); |
| compare_transport( |
| test, |
| test.is_ip_payload_fragmented(), |
| expected_payload, |
| &actual, |
| ); |
| } |
| Some(Layer::VlanHeader) => { |
| assert_eq!( |
| test.link, |
| actual.link.as_ref().map(|v| v.to_header()).flatten() |
| ); |
| compare_vlan(test, data, &actual); |
| assert_eq!(None, actual.net); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::Ipv6Header) | Some(Layer::Ipv4Header) | Some(Layer::IpHeader) => { |
| assert_eq!( |
| test.link, |
| actual.link.as_ref().map(|v| v.to_header()).flatten() |
| ); |
| compare_vlan(test, data, &actual); |
| assert_eq!(None, actual.net); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::IpAuthHeader) |
| | Some(Layer::Ipv6ExtHeader) |
| | Some(Layer::Ipv6HopByHopHeader) |
| | Some(Layer::Ipv6DestOptionsHeader) |
| | Some(Layer::Ipv6RouteHeader) |
| | Some(Layer::Ipv6FragHeader) => { |
| assert_eq!( |
| test.link, |
| actual.link.as_ref().map(|v| v.to_header()).flatten() |
| ); |
| compare_vlan(test, data, &actual); |
| compare_ip_header_only(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::TcpHeader) |
| | Some(Layer::UdpHeader) |
| | Some(Layer::Icmpv4) |
| | Some(Layer::Icmpv6) => { |
| assert_eq!( |
| test.link, |
| actual.link.as_ref().map(|v| v.to_header()).flatten() |
| ); |
| compare_vlan(test, data, &actual); |
| compare_ip(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| _ => unreachable!("error in an unexpected layer"), |
| } |
| } |
| } |
| // from_ether_type (vlan at start) |
| if test.link.is_none() && test.vlan.is_some() { |
| for ether_type in VLAN_ETHER_TYPES { |
| let actual = LaxSlicedPacket::from_ether_type(ether_type, data); |
| assert_eq!(actual.stop_err, expected_stop_err); |
| assert_eq!( |
| Some(LinkSlice::EtherPayload(EtherPayloadSlice { |
| ether_type, |
| payload: data |
| })), |
| actual.link |
| ); |
| compare_vlan(test, data, &actual); |
| match expected_stop_err.as_ref().map(|v| v.1) { |
| None => { |
| compare_ip(test, &actual); |
| compare_transport( |
| test, |
| test.is_ip_payload_fragmented(), |
| expected_payload, |
| &actual, |
| ); |
| } |
| Some(Layer::VlanHeader) => { |
| assert_eq!(None, actual.net); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::Ipv6Header) | Some(Layer::Ipv4Header) | Some(Layer::IpHeader) => { |
| assert_eq!(None, actual.net); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::IpAuthHeader) |
| | Some(Layer::Ipv6ExtHeader) |
| | Some(Layer::Ipv6HopByHopHeader) |
| | Some(Layer::Ipv6DestOptionsHeader) |
| | Some(Layer::Ipv6RouteHeader) |
| | Some(Layer::Ipv6FragHeader) => { |
| compare_ip_header_only(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::TcpHeader) |
| | Some(Layer::UdpHeader) |
| | Some(Layer::Icmpv4) |
| | Some(Layer::Icmpv6) => { |
| compare_ip(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| _ => unreachable!("error in an unexpected layer"), |
| } |
| } |
| } |
| // from_ether_type (ip at start) |
| if test.link.is_none() && test.vlan.is_none() { |
| if let Some(ip) = &test.net { |
| let ether_type = match ip { |
| NetHeaders::Ipv4(_, _) => ether_type::IPV4, |
| NetHeaders::Ipv6(_, _) => ether_type::IPV6, |
| }; |
| let actual = LaxSlicedPacket::from_ether_type(ether_type, &data); |
| assert_eq!(actual.stop_err, expected_stop_err); |
| assert_eq!( |
| Some(LinkSlice::EtherPayload(EtherPayloadSlice { |
| ether_type, |
| payload: data |
| })), |
| actual.link |
| ); |
| assert_eq!(test.vlan, None); |
| match expected_stop_err.as_ref().map(|v| v.1) { |
| None => { |
| compare_ip(test, &actual); |
| compare_transport( |
| test, |
| test.is_ip_payload_fragmented(), |
| expected_payload, |
| &actual, |
| ); |
| } |
| Some(Layer::Ipv6Header) | Some(Layer::Ipv4Header) | Some(Layer::IpHeader) => { |
| assert_eq!(None, actual.net); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::IpAuthHeader) |
| | Some(Layer::Ipv6ExtHeader) |
| | Some(Layer::Ipv6HopByHopHeader) |
| | Some(Layer::Ipv6DestOptionsHeader) |
| | Some(Layer::Ipv6RouteHeader) |
| | Some(Layer::Ipv6FragHeader) => { |
| compare_ip_header_only(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::TcpHeader) |
| | Some(Layer::UdpHeader) |
| | Some(Layer::Icmpv4) |
| | Some(Layer::Icmpv6) => { |
| compare_ip(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| _ => unreachable!("error in an unexpected layer"), |
| } |
| } |
| } |
| // from_ip_slice |
| if test.link.is_none() && test.vlan.is_none() && test.net.is_some() { |
| if let Some(err) = expected_ip_err { |
| assert_eq!(err, LaxSlicedPacket::from_ip(&data).unwrap_err()); |
| } else { |
| let actual = LaxSlicedPacket::from_ip(&data).unwrap(); |
| assert_eq!(actual.stop_err, expected_stop_err); |
| assert_eq!(actual.link, None); |
| assert_eq!(test.vlan, None); |
| match expected_stop_err.as_ref().map(|v| v.1) { |
| None => { |
| compare_ip(test, &actual); |
| compare_transport( |
| test, |
| test.is_ip_payload_fragmented(), |
| expected_payload, |
| &actual, |
| ); |
| } |
| Some(Layer::IpAuthHeader) |
| | Some(Layer::Ipv6ExtHeader) |
| | Some(Layer::Ipv6HopByHopHeader) |
| | Some(Layer::Ipv6DestOptionsHeader) |
| | Some(Layer::Ipv6RouteHeader) |
| | Some(Layer::Ipv6FragHeader) => { |
| compare_ip_header_only(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| Some(Layer::TcpHeader) |
| | Some(Layer::UdpHeader) |
| | Some(Layer::Icmpv4) |
| | Some(Layer::Icmpv6) => { |
| compare_ip(test, &actual); |
| assert_eq!(None, actual.transport); |
| } |
| _ => unreachable!("error in an unexpected layer"), |
| } |
| } |
| } |
| } |
| } |
