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use super::super::*; extern crate byteorder; use self::byteorder::ReadBytesExt; ///Internet protocol headers version 4 & 6 #[derive(Clone, Debug, Eq, PartialEq)] pub enum IpHeader { Version4(Ipv4Header), Version6(Ipv6Header) } impl IpHeader { ///Read an IpvHeader from a slice and return the header & unused parts of the slice. pub fn read_from_slice(slice: &[u8]) -> Result<(IpHeader, &[u8]), ReadError> { use crate::ReadError::*; if slice.is_empty() { Err(UnexpectedEndOfSlice(1)) } else { match slice[0] >> 4 { 4 => { Ipv4Header::read_from_slice(slice) .map(|value| (IpHeader::Version4(value.0), value.1)) }, 6 => { Ipv6Header::read_from_slice(slice) .map(|value| (IpHeader::Version6(value.0), value.1)) }, version => Err(ReadError::IpUnsupportedVersion(version)) } } } ///Reads an IP (v4 or v6) header from the current position. pub fn read<T: io::Read + io::Seek + Sized>(reader: &mut T) -> Result<IpHeader, ReadError> { let value = reader.read_u8()?; match value >> 4 { 4 => Ok(IpHeader::Version4(Ipv4Header::read_without_version(reader, value & 0xf)?)), 6 => Ok(IpHeader::Version6(Ipv6Header::read_without_version(reader, value & 0xf)?)), version => Err(ReadError::IpUnsupportedVersion(version)) } } ///Writes an IP (v4 or v6) header to the current position pub fn write<T: io::Write + Sized>(&self, writer: &mut T) -> Result<(), WriteError> { use crate::IpHeader::*; match *self { Version4(ref value) => value.write(writer), Version6(ref value) => value.write(writer) } } } ///Identifiers for the traffic_class field in ipv6 headers and protocol field in ipv4 headers. #[derive(Debug, PartialEq, Eq, Clone)] pub enum IpTrafficClass { ///IPv6 Hop-by-Hop Option [RFC8200] IPv6HeaderHopByHop = 0, ///Internet Control Message [RFC792] Icmp = 1, ///Internet Group Management [RFC1112] Igmp = 2, ///Gateway-to-Gateway [RFC823] Ggp = 3, ///IPv4 encapsulation [RFC2003] IPv4 = 4, ///Stream [RFC1190][RFC1819] Stream = 5, ///Transmission Control [RFC793] Tcp = 6, ///CBT [Tony_Ballardie] Cbt = 7, ///Exterior Gateway Protocol [RFC888][David_Mills] Egp = 8, ///any private interior gateway (used by Cisco for their IGRP) [Internet_Assigned_Numbers_Authority] Igp = 9, ///BBN RCC Monitoring [Steve_Chipman] BbnRccMon = 10, ///Network Voice Protocol [RFC741][Steve_Casner] NvpII = 11, ///PUP Pup = 12, ///ARGUS (deprecated) [Robert_W_Scheifler] Argus = 13, ///EMCON [<mystery contact>] Emcon = 14, ///Cross Net Debugger [Haverty, J., "XNET Formats for Internet Protocol Version 4", IEN 158, October 1980.][Jack_Haverty] Xnet = 15, ///Chaos [J_Noel_Chiappa] Chaos = 16, ///User Datagram [RFC768][Jon_Postel] Udp = 17, ///Multiplexing [Cohen, D. and J. Postel, "Multiplexing Protocol", IEN 90, USC/Information Sciences Institute, May 1979.][Jon_Postel] Mux = 18, ///DCN Measurement Subsystems [David_Mills] DcnMeas = 19, ///Host Monitoring [RFC869][Bob_Hinden] Hmp = 20, ///Packet Radio Measurement [Zaw_Sing_Su] Prm = 21, ///XEROX NS IDP XnsIdp = 22, ///Trunk-1 [Barry_Boehm] Trunk1 = 23, ///Trunk-2 [Barry_Boehm] Trunk2 = 24, ///Leaf-1 [Barry_Boehm] Leaf1 = 25, ///Leaf-2 [Barry_Boehm] Leaf2 = 26, ///Reliable Data Protocol [RFC908][Bob_Hinden] Rdp = 27, ///Internet Reliable Transaction [RFC938][Trudy_Miller] Irtp = 28, ///ISO Transport Protocol Class 4 [RFC905][<mystery contact>] IsoTp4 = 29, ///Bulk Data Transfer Protocol [RFC969][David_Clark] NetBlt = 30, ///MFE Network Services Protocol [Shuttleworth, B., "A Documentary of MFENet, a National Computer Network", UCRL-52317, Lawrence Livermore Labs, Livermore, California, June 1977.][Barry_Howard] MfeNsp = 31, ///MERIT Internodal Protocol [Hans_Werner_Braun] MeritInp = 32, ///Datagram Congestion Control Protocol [RFC4340] Dccp = 33, ///Third Party Connect Protocol [Stuart_A_Friedberg] ThirdPartyConnectProtocol = 34, ///Inter-Domain Policy Routing Protocol [Martha_Steenstrup] Idpr = 35, ///XTP [Greg_Chesson] Xtp = 36, ///Datagram Delivery Protocol [Wesley_Craig] Ddp = 37, ///IDPR Control Message Transport Proto [Martha_Steenstrup] IdprCmtp = 38, ///TP++ Transport Protocol [Dirk_Fromhein] TpPlusPlus = 39, ///IL Transport Protocol [Dave_Presotto] Il = 40, ///IPv6 encapsulation [RFC2473] Ipv6 = 41, ///Source Demand Routing Protocol [Deborah_Estrin] Sdrp = 42, ///Routing Header for IPv6 [Steve_Deering] IPv6RouteHeader = 43, ///Fragment Header for IPv6 [Steve_Deering] IPv6FragmentationHeader = 44, ///Inter-Domain Routing Protocol [Sue_Hares] Idrp = 45, ///Reservation Protocol [RFC2205][RFC3209][Bob_Braden] Rsvp = 46, ///Generic Routing Encapsulation [RFC2784][Tony_Li] Gre = 47, ///Dynamic Source Routing Protocol [RFC4728] Dsr = 48, ///BNA [Gary Salamon] Bna = 49, ///Encap Security Payload [RFC4303] IPv6EncapSecurityPayload = 50, ///Authentication Header [RFC4302] IPv6AuthenticationHeader = 51, ///Integrated Net Layer Security TUBA [K_Robert_Glenn] Inlsp = 52, ///IP with Encryption (deprecated) [John_Ioannidis] Swipe = 53, ///NBMA Address Resolution Protocol [RFC1735] Narp = 54, ///IP Mobility [Charlie_Perkins] Mobile = 55, ///Transport Layer Security Protocol using Kryptonet key management [Christer_Oberg] Tlsp = 56, ///SKIP [Tom_Markson] Skip = 57, ///ICMP for IPv6 [RFC8200] IPv6Icmp = 58, ///No Next Header for IPv6 [RFC8200] IPv6NoNextHeader = 59, ///Destination Options for IPv6 [RFC8200] IPv6DestinationOptions = 60, ///any host internal protocol [Internet_Assigned_Numbers_Authority] AnyHostInternalProtocol = 61, ///CFTP [Forsdick, H., "CFTP", Network Message, Bolt Beranek and Newman, January 1982.][Harry_Forsdick] Cftp = 62, ///any local network [Internet_Assigned_Numbers_Authority] AnyLocalNetwork = 63, ///SATNET and Backroom EXPAK [Steven_Blumenthal] SatExpak = 64, ///Kryptolan [Paul Liu] Krytolan = 65, ///MIT Remote Virtual Disk Protocol [Michael_Greenwald] Rvd = 66, ///Internet Pluribus Packet Core [Steven_Blumenthal] Ippc = 67, ///any distributed file system [Internet_Assigned_Numbers_Authority] AnyDistributedFileSystem = 68, ///SATNET Monitoring [Steven_Blumenthal] SatMon = 69, ///VISA Protocol [Gene_Tsudik] Visa = 70, ///Internet Packet Core Utility [Steven_Blumenthal] Ipcv = 71, ///Computer Protocol Network Executive [David Mittnacht] Cpnx = 72, ///Computer Protocol Heart Beat [David Mittnacht] Cphb = 73, ///Wang Span Network [Victor Dafoulas] Wsn = 74, ///Packet Video Protocol [Steve_Casner] Pvp = 75, ///Backroom SATNET Monitoring [Steven_Blumenthal] BrSatMon = 76, ///SUN ND PROTOCOL-Temporary [William_Melohn] SunNd = 77, ///WIDEBAND Monitoring [Steven_Blumenthal] WbMon = 78, ///WIDEBAND EXPAK [Steven_Blumenthal] WbExpak = 79, ///ISO Internet Protocol [Marshall_T_Rose] IsoIp = 80, ///VMTP [Dave_Cheriton] Vmtp = 81, ///SECURE-VMTP [Dave_Cheriton] SecureVmtp = 82, ///VINES [Brian Horn] Vines = 83, ///Transaction Transport Protocol or Internet Protocol Traffic Manager [Jim_Stevens] TtpOrIptm = 84, ///NSFNET-IGP [Hans_Werner_Braun] NsfnetIgp = 85, ///Dissimilar Gateway Protocol [M/A-COM Government Systems, "Dissimilar Gateway Protocol Specification, Draft Version", Contract no. CS901145, November 16, 1987.][Mike_Little] Dgp = 86, ///TCF [Guillermo_A_Loyola] Tcf = 87, ///EIGRP [RFC7868] Eigrp = 88, ///OSPFIGP [RFC1583][RFC2328][RFC5340][John_Moy] Ospfigp = 89, ///Sprite RPC Protocol [Welch, B., "The Sprite Remote Procedure Call System", Technical Report, UCB/Computer Science Dept., 86/302, University of California at Berkeley, June 1986.][Bruce Willins] SpriteRpc = 90, ///Locus Address Resolution Protocol [Brian Horn] Larp = 91, ///Multicast Transport Protocol [Susie_Armstrong] Mtp = 92, ///AX.25 Frames [Brian_Kantor] Ax25 = 93, ///IP-within-IP Encapsulation Protocol [John_Ioannidis] Ipip = 94, ///Mobile Internetworking Control Pro. (deprecated) [John_Ioannidis] Micp = 95, ///Semaphore Communications Sec. Pro. [Howard_Hart] SccSp = 96, ///Ethernet-within-IP Encapsulation [RFC3378] EtherIp = 97, ///Encapsulation Header [RFC1241][Robert_Woodburn] Encap = 98, ///GMTP [[RXB5]] Gmtp = 100, ///Ipsilon Flow Management Protocol [Bob_Hinden][November 1995, 1997.] Ifmp = 101, ///PNNI over IP [Ross_Callon] Pnni = 102, ///Protocol Independent Multicast [RFC7761][Dino_Farinacci] Pim = 103, ///ARIS [Nancy_Feldman] Aris = 104, ///SCPS [Robert_Durst] Scps = 105, ///QNX [Michael_Hunter] Qnx = 106, ///Active Networks [Bob_Braden] ActiveNetworks = 107, ///IP Payload Compression Protocol [RFC2393] IpComp = 108, ///Sitara Networks Protocol [Manickam_R_Sridhar] SitraNetworksProtocol = 109, ///Compaq Peer Protocol [Victor_Volpe] CompaqPeer = 110, ///IPX in IP [CJ_Lee] IpxInIp = 111, ///Virtual Router Redundancy Protocol [RFC5798] Vrrp = 112, ///PGM Reliable Transport Protocol [Tony_Speakman] Pgm = 113, ///any 0-hop protocol [Internet_Assigned_Numbers_Authority] AnyZeroHopProtocol = 114, ///Layer Two Tunneling Protocol [RFC3931][Bernard_Aboba] Layer2TunnelingProtocol = 115, ///D-II Data Exchange (DDX) [John_Worley] Ddx = 116, ///Interactive Agent Transfer Protocol [John_Murphy] Iatp = 117, ///Schedule Transfer Protocol [Jean_Michel_Pittet] Stp = 118, ///SpectraLink Radio Protocol [Mark_Hamilton] Srp = 119, ///UTI [Peter_Lothberg] Uti = 120, ///Simple Message Protocol [Leif_Ekblad] SimpleMessageProtocol = 121, ///Simple Multicast Protocol (deprecated) [Jon_Crowcroft][draft-perlman-simple-multicast] Sm = 122, ///Performance Transparency Protocol [Michael_Welzl] Ptp = 123, ///ISIS over IPv4 [Tony_Przygienda] IsisOverIpv4 = 124, ///FIRE [Criag_Partridge] Fire = 125, ///Combat Radio Transport Protocol [Robert_Sautter] Crtp = 126, ///Combat Radio User Datagram [Robert_Sautter] Crudp = 127, ///SSCOPMCE [Kurt_Waber] Sscopmce = 128, ///IPLT [[Hollbach]] Iplt = 129, ///Secure Packet Shield [Bill_McIntosh] Sps = 130, ///Private IP Encapsulation within IP [Bernhard_Petri] Pipe = 131, ///Stream Control Transmission Protocol [Randall_R_Stewart] Sctp = 132, ///Fibre Channel [Murali_Rajagopal][RFC6172] Fc = 133, ///RSVP-E2E-IGNORE [RFC3175] RsvpE2eIgnore = 134, ///MobilityHeader [RFC6275] MobilityHeader = 135, ///UDPLite [RFC3828] UdpLite = 136, /// [RFC4023] MplsInIp = 137, ///MANET Protocols [RFC5498] Manet = 138, ///Host Identity Protocol [RFC7401] Hip = 139, ///Shim6 Protocol [RFC5533] Shim6 = 140, ///Wrapped Encapsulating Security Payload [RFC5840] Wesp = 141, ///Robust Header Compression [RFC5858] Rohc = 142, ///Use for experimentation and testing ExperimentalAndTesting0 = 253, ///Use for experimentation and testing ExperimentalAndTesting1 = 254 } impl IpTrafficClass { ///Returns true if the given id identifies an IPV6 extension header traffic class. pub fn is_ipv6_ext_header_value(value: u8) -> bool { use crate::IpTrafficClass::*; const HOP_BY_HOP: u8 = IPv6HeaderHopByHop as u8; //0 const ROUTE: u8 = IPv6RouteHeader as u8; //43 const FRAG: u8 = IPv6FragmentationHeader as u8; //44 const ENCAP_SEC: u8 = IPv6EncapSecurityPayload as u8; //50 const AUTH: u8 = IPv6AuthenticationHeader as u8; //51 const OPTIONS: u8 = IPv6DestinationOptions as u8; //60 const MOBILITY: u8 = MobilityHeader as u8; //135 const HIP: u8 = Hip as u8; //139 const SHIM6: u8 = Shim6 as u8; //140 const EXP0: u8 = ExperimentalAndTesting0 as u8; //253 const EXP1: u8 = ExperimentalAndTesting1 as u8; //254 match value { HOP_BY_HOP | ROUTE | FRAG | ENCAP_SEC | AUTH | OPTIONS | MOBILITY | HIP | SHIM6 | EXP0 | EXP1 => true, _ => false } } }