1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516
use super::super::*;
///Internet protocol headers version 4 & 6
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum IpHeader {
Version4(Ipv4Header, Ipv4Extensions),
Version6(Ipv6Header, Ipv6Extensions)
}
impl IpHeader {
/// Renamed to `IpHeader::from_slice`
#[deprecated(
since = "0.10.1",
note = "Renamed to `IpHeader::from_slice`"
)]
#[inline]
pub fn read_from_slice(slice: &[u8]) -> Result<(IpHeader, u8, &[u8]), ReadError> {
IpHeader::from_slice(slice)
}
/// Read an IpvHeader from a slice and return the header & unused parts of the slice.
pub fn from_slice(slice: &[u8]) -> Result<(IpHeader, u8, &[u8]), ReadError> {
use crate::ReadError::*;
if slice.is_empty() {
Err(UnexpectedEndOfSlice(1))
} else {
match slice[0] >> 4 {
4 => {
let (header, rest) = Ipv4Header::from_slice(slice)?;
Ipv4Extensions::from_slice(header.protocol, rest).map(
|(ext, next_protocol, rest)|
(IpHeader::Version4(header, ext), next_protocol, rest)
)
},
6 => {
let (header, rest) = Ipv6Header::from_slice(slice)?;
Ipv6Extensions::from_slice(header.next_header, rest).map(
|(ext, next_protocol, rest)|
(IpHeader::Version6(header, ext), next_protocol, rest)
)
},
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, u8), ReadError> {
let value = {
let mut buf = [0;1];
reader.read_exact(&mut buf)?;
buf[0]
};
match value >> 4 {
4 => {
let header = Ipv4Header::read_without_version(reader, value & 0xf)?;
Ipv4Extensions::read(reader, header.protocol).map(
|(ext, next)| (IpHeader::Version4(header, ext), next)
)
},
6 => {
let header = Ipv6Header::read_without_version(reader, value & 0xf)?;
Ipv6Extensions::read(reader, header.next_header).map(
|(ext, next)| (IpHeader::Version6(header, ext), next)
)
},
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 header, ref extensions) => {
header.write(writer)?;
extensions.write(writer, header.protocol)
}
Version6(ref header, ref extensions) => {
header.write(writer)?;
extensions.write(writer, header.next_header)
}
}
}
/// Returns the size when the ip header & extensions are serialized
pub fn header_len(&self) -> usize {
use crate::IpHeader::*;
match *self {
Version4(ref header, ref extensions) => {
header.header_len() + extensions.header_len()
}
Version6(_, ref extensions) => {
Ipv6Header::SERIALIZED_SIZE + extensions.header_len()
}
}
}
/// Returns the last next header number following the ip header
/// and header extensions.
pub fn next_header(&self) -> Result<u8, ValueError> {
use crate::IpHeader::*;
match *self {
Version4(ref header, ref extensions) => {
extensions.next_header(header.protocol)
}
Version6(ref header, ref extensions) => {
extensions.next_header(header.next_header)
}
}
}
/// Sets all the next_header fields in the ipv4 & ipv6 header
/// as well as in all extension headers and returns the ether
/// type number.
///
/// The given number will be set as the last "next_header" or
/// protocol number.
pub fn set_next_headers(&mut self, last_next_header: u8) -> EtherType {
use IpHeader::*;
match self {
Version4(ref mut header, ref mut extensions) => {
header.protocol = extensions.set_next_headers(last_next_header);
EtherType::Ipv4
},
Version6(ref mut header, ref mut extensions) => {
header.next_header = extensions.set_next_headers(last_next_header);
EtherType::Ipv6
},
}
}
}
/// This type has been deprecated please use [IpNumber] instead.
///
/// IPv6 headers have a field called `traffic_class` which has nothing
/// to do this enum. This unlucky coincedence got even the developer
/// of this library confused enough to write that the next header number
/// should be written into the `traffic_class` field instead of the
/// `next_header` field.
///
/// To avoid such confusions in the future the enum has been renamed
/// to [IpNumber], which also closer to the name
/// "Assigned Internet Protocol Numbers" used on iana.org .
#[deprecated(
since = "0.10.1",
note = "Please use the type IpNumber instead"
)]
pub type IpTrafficClass = IpNumber;
/// Identifiers for the next_header field in ipv6 headers and protocol field in ipv4 headers.
///
/// `u8` contants of the ip numbers can be found in the module [ip_number].
///
/// The list was extracted from <https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml>
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum IpNumber {
///IPv6 Hop-by-Hop Option \[[RFC8200](https://datatracker.ietf.org/doc/html/rfc8200)\]
IPv6HeaderHopByHop = 0,
///Internet Control Message \[[RFC792](https://datatracker.ietf.org/doc/html/rfc792)\]
Icmp = 1,
///Internet Group Management \[[RFC1112](https://datatracker.ietf.org/doc/html/rfc1112)\]
Igmp = 2,
///Gateway-to-Gateway \[[RFC823](https://datatracker.ietf.org/doc/html/rfc823)\]
Ggp = 3,
///IPv4 encapsulation \[[RFC2003](https://datatracker.ietf.org/doc/html/rfc2003)\]
IPv4 = 4,
///Stream \[[RFC1190](https://datatracker.ietf.org/doc/html/rfc1190)\] \[[RFC1819](https://datatracker.ietf.org/doc/html/rfc1819)\]
Stream = 5,
///Transmission Control \[[RFC793](https://datatracker.ietf.org/doc/html/rfc793)\]
Tcp = 6,
///CBT \[Tony_Ballardie\]
Cbt = 7,
///Exterior Gateway Protocol \[[RFC888](https://datatracker.ietf.org/doc/html/rfc888)\] \[David_Mills\]
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 \[[RFC741](https://datatracker.ietf.org/doc/html/rfc741)\]\[Steve_Casner\]
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 \[[RFC768](https://datatracker.ietf.org/doc/html/rfc768)\]\[Jon_Postel\]
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 \[[RFC869](https://datatracker.ietf.org/doc/html/rfc869)\]\[Bob_Hinden\]
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 \[[RFC908](https://datatracker.ietf.org/doc/html/rfc908)\] \[Bob_Hinden\]
Rdp = 27,
///Internet Reliable Transaction \[[RFC938](https://datatracker.ietf.org/doc/html/rfc938)\] \[Trudy_Miller\]
Irtp = 28,
///ISO Transport Protocol Class 4 \[[RFC905](https://datatracker.ietf.org/doc/html/rfc905)\] \[<mystery contact>\]
IsoTp4 = 29,
///Bulk Data Transfer Protocol \[[RFC969](https://datatracker.ietf.org/doc/html/rfc969)\] \[David_Clark\]
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 \[[RFC4340](https://datatracker.ietf.org/doc/html/rfc4340)\]
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 \[[RFC2473](https://datatracker.ietf.org/doc/html/rfc2473)\]
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 \[[RFC2205](https://datatracker.ietf.org/doc/html/rfc2205)\]\[[RFC3209](https://datatracker.ietf.org/doc/html/rfc3209)\]\[Bob_Braden\]
Rsvp = 46,
///Generic Routing Encapsulation \[[RFC2784](https://datatracker.ietf.org/doc/html/rfc2784)\]\[Tony_Li\]
Gre = 47,
///Dynamic Source Routing Protocol \[[RFC4728](https://datatracker.ietf.org/doc/html/rfc4728)\]
Dsr = 48,
///BNA \[Gary Salamon\]
Bna = 49,
///Encapsulating Security Payload \[[RFC4303](https://datatracker.ietf.org/doc/html/rfc4303)\]
EncapsulatingSecurityPayload = 50,
///Authentication Header \[[RFC4302](https://datatracker.ietf.org/doc/html/rfc4302)\]
AuthenticationHeader = 51,
///Integrated Net Layer Security TUBA \[K_Robert_Glenn\]
Inlsp = 52,
///IP with Encryption (deprecated) \[John_Ioannidis\]
Swipe = 53,
///NBMA Address Resolution Protocol \[[RFC1735](https://datatracker.ietf.org/doc/html/rfc1735)\]
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 \[[RFC8200](https://datatracker.ietf.org/doc/html/rfc8200)\]
IPv6Icmp = 58,
///No Next Header for IPv6 \[[RFC8200](https://datatracker.ietf.org/doc/html/rfc8200)\]
IPv6NoNextHeader = 59,
///Destination Options for IPv6 \[[RFC8200](https://datatracker.ietf.org/doc/html/rfc8200)\]
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 \[[RFC7868](https://datatracker.ietf.org/doc/html/rfc7868)\]
Eigrp = 88,
///OSPFIGP \[[RFC1583](https://datatracker.ietf.org/doc/html/rfc1583)\]\[[RFC2328](https://datatracker.ietf.org/doc/html/rfc2328)\]\[[RFC5340](https://datatracker.ietf.org/doc/html/rfc5340)\]\[John_Moy\]
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 \[[RFC3378](https://datatracker.ietf.org/doc/html/rfc3378)\]
EtherIp = 97,
///Encapsulation Header \[[RFC1241](https://datatracker.ietf.org/doc/html/rfc1241)\]\[Robert_Woodburn\]
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 \[[RFC7761](https://datatracker.ietf.org/doc/html/rfc7761)\]\[Dino_Farinacci\]
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 \[[RFC2393](https://datatracker.ietf.org/doc/html/rfc2393)\]
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 \[[RFC5798](https://datatracker.ietf.org/doc/html/rfc5798)\]
Vrrp = 112,
///PGM Reliable Transport Protocol \[Tony_Speakman\]
Pgm = 113,
///any 0-hop protocol \[Internet_Assigned_Numbers_Authority\]
AnyZeroHopProtocol = 114,
///Layer Two Tunneling Protocol \[[RFC3931](https://datatracker.ietf.org/doc/html/rfc3931)\]\[Bernard_Aboba\]
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 \[Murali_Rajagopal\]\[[RFC6172](https://datatracker.ietf.org/doc/html/rfc6172)\]
Fc = 133,
///RSVP-E2E-IGNORE \[[RFC3175](https://datatracker.ietf.org/doc/html/rfc3175)\]
RsvpE2eIgnore = 134,
///MobilityHeader \[[RFC6275](https://datatracker.ietf.org/doc/html/rfc6275)\]
MobilityHeader = 135,
///UDPLite \[[RFC3828](https://datatracker.ietf.org/doc/html/rfc3828)\]
UdpLite = 136,
/// \[[RFC4023](https://datatracker.ietf.org/doc/html/rfc4023)\]
MplsInIp = 137,
///MANET Protocols \[[RFC5498](https://datatracker.ietf.org/doc/html/rfc5498)\]
Manet = 138,
///Host Identity Protocol \[[RFC7401](https://datatracker.ietf.org/doc/html/rfc7401)\]
Hip = 139,
///Shim6 Protocol \[[RFC5533](https://datatracker.ietf.org/doc/html/rfc5533)\]
Shim6 = 140,
///Wrapped Encapsulating Security Payload \[[RFC5840](https://datatracker.ietf.org/doc/html/rfc5840)\]
Wesp = 141,
///Robust Header Compression \[[RFC5858](https://datatracker.ietf.org/doc/html/rfc5858)\]
Rohc = 142,
///Use for experimentation and testing
ExperimentalAndTesting0 = 253,
///Use for experimentation and testing
ExperimentalAndTesting1 = 254
}
impl IpNumber {
/// Returns true if the given number is the internet number of an IPV6 extension header.
pub fn is_ipv6_ext_header_value(value: u8) -> bool {
use crate::ip_number::*;
matches!(
value,
IPV6_HOP_BY_HOP | IPV6_ROUTE | IPV6_FRAG | ENCAP_SEC | AUTH
| IPV6_DEST_OPTIONS | MOBILITY | HIP | SHIM6 | EXP0 | EXP1
)
}
}
/// Module containing the u8 constants for the most used ip protocol number.
///
/// The constants only exist for convenience. You can get equivalent values by
/// casting the enum values of [IpNumber] to a u8 value.
///
/// ```
/// use etherparse::{ip_number, IpNumber};
///
/// assert_eq!(ip_number::TCP, IpNumber::Tcp as u8);
/// ```
///
/// The list original values were copied from
/// <https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml>
pub mod ip_number {
use crate::IpNumber::*;
///IPv6 Hop-by-Hop Option \[[RFC8200](https://datatracker.ietf.org/doc/html/rfc8200)\]
pub const IPV6_HOP_BY_HOP: u8 = IPv6HeaderHopByHop as u8; //0
///Internet Control Message \[[RFC792](https://datatracker.ietf.org/doc/html/rfc792)\]
pub const ICMP: u8 = Icmp as u8; //1
///Internet Group Management \[[RFC1112](https://datatracker.ietf.org/doc/html/rfc1112)\]
pub const IGMP: u8 = Igmp as u8; //2
///Gateway-to-Gateway \[[RFC823](https://datatracker.ietf.org/doc/html/rfc823)\]
pub const GGP: u8 = Ggp as u8; //3
///IPv4 encapsulation \[[RFC2003](https://datatracker.ietf.org/doc/html/rfc2003)\]
pub const IPV4: u8 = IPv4 as u8; //4
///Stream \[[RFC1190](https://datatracker.ietf.org/doc/html/rfc1190)\] \[[RFC1819](https://datatracker.ietf.org/doc/html/rfc1819)\]
pub const STREAM: u8 = Stream as u8; //5
///Transmission Control \[[RFC793](https://datatracker.ietf.org/doc/html/rfc793)\]
pub const TCP: u8 = Tcp as u8; //6
///User Datagram \[[RFC768](https://datatracker.ietf.org/doc/html/rfc768)\] \[Jon_Postel\]
pub const UDP: u8 = Udp as u8; //17
///IPv6 encapsulation \[[RFC2473](https://datatracker.ietf.org/doc/html/rfc2473)\]
pub const IPV6: u8 = Ipv6 as u8; //41
///Routing Header for IPv6 \[Steve_Deering\]
pub const IPV6_ROUTE: u8 = IPv6RouteHeader as u8; //43
///Fragment Header for IPv6 \[Steve_Deering\]
pub const IPV6_FRAG: u8 = IPv6FragmentationHeader as u8; //44
///Encapsulating Security Payload \[[RFC4303](https://datatracker.ietf.org/doc/html/rfc4303)\]
pub const ENCAP_SEC: u8 = EncapsulatingSecurityPayload as u8; //50
///Authentication Header \[[RFC4302](https://datatracker.ietf.org/doc/html/rfc4302)\]
pub const AUTH: u8 = AuthenticationHeader as u8; //51
///Destination Options for IPv6 \[[RFC8200](https://datatracker.ietf.org/doc/html/rfc8200)\]
pub const IPV6_DEST_OPTIONS: u8 = IPv6DestinationOptions as u8; //60
///MobilityHeader \[[RFC6275](https://datatracker.ietf.org/doc/html/rfc6275)\]
pub const MOBILITY: u8 = MobilityHeader as u8; //135
///Host Identity Protocol \[[RFC7401](https://datatracker.ietf.org/doc/html/rfc7401)\]
pub const HIP: u8 = Hip as u8; //139
///Shim6 Protocol \[[RFC5533](https://datatracker.ietf.org/doc/html/rfc5533)\]
pub const SHIM6: u8 = Shim6 as u8; //140
///Use for experimentation and testing
pub const EXP0: u8 = ExperimentalAndTesting0 as u8; //253
///Use for experimentation and testing
pub const EXP1: u8 = ExperimentalAndTesting1 as u8; //254
}