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tcpdump/ipproto.c
Ahmed Abdelsalam 1103418a18 Add support for ethernet IP protocol 
The SRv6 network programming defines a new IP protocol number [1].

The new protocol number is used in the Next Header field of an IPv6 header
or any extension header indicates that the payload is an Ethernet.

IANA has assigned 143 as the protocol number of ethernet [2].

The SRv6 packet has the following format:
IPv6 HDR + SRH + Ethernet HDR + IPv4/IPv6 packet

This patch allows TCPDUMP to dissect such SRv6 packets.

[1] https://tools.ietf.org/html/draft-ietf-spring-srv6-network-programming-16#section-9.1
[2] https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml

Signed-off-by: Ahmed Abdelsalam <ahabdels@gmail.com>
2020-08-07 16:11:20 +00:00

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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code
* distributions retain the above copyright notice and this paragraph
* in its entirety, and (2) distributions including binary code include
* the above copyright notice and this paragraph in its entirety in
* the documentation or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* Original code by Hannes Gredler (hannes@gredler.at)
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "ipproto.h"
const struct tok ipproto_values[] = {
{ IPPROTO_HOPOPTS, "Options" },
{ IPPROTO_ICMP, "ICMP" },
{ IPPROTO_IGMP, "IGMP" },
{ IPPROTO_IPV4, "IPIP" },
{ IPPROTO_TCP, "TCP" },
{ IPPROTO_EGP, "EGP" },
{ IPPROTO_PIGP, "IGRP" },
{ IPPROTO_UDP, "UDP" },
{ IPPROTO_DCCP, "DCCP" },
{ IPPROTO_IPV6, "IPv6" },
{ IPPROTO_ROUTING, "Routing" },
{ IPPROTO_FRAGMENT, "Fragment" },
{ IPPROTO_RSVP, "RSVP" },
{ IPPROTO_GRE, "GRE" },
{ IPPROTO_ESP, "ESP" },
{ IPPROTO_AH, "AH" },
{ IPPROTO_MOBILE, "Mobile IP" },
{ IPPROTO_ICMPV6, "ICMPv6" },
{ IPPROTO_MOBILITY_OLD, "Mobile IP (old)" },
{ IPPROTO_EIGRP, "EIGRP" },
{ IPPROTO_OSPF, "OSPF" },
{ IPPROTO_PIM, "PIM" },
{ IPPROTO_IPCOMP, "Compressed IP" },
{ IPPROTO_VRRP, "VRRP" }, /* See also CARP. */
{ IPPROTO_PGM, "PGM" },
{ IPPROTO_SCTP, "SCTP" },
{ IPPROTO_MOBILITY, "Mobility" },
{ IPPROTO_ETHERNET, "Ethernet" },
{ 0, NULL }
};
/*
* For completeness the number space in the array below comes from IANA:
* https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
* However, the spelling tries to match that of /etc/protocols to achieve as
* much consistency as possible with the previously implemented behaviour,
* which was based on getprotobynumber (3).
*/
static const char *netdb_protocol_names[256] = {
"hopopt", /* 0 (IPPROTO_HOPOPTS, IPv6 Hop-by-Hop Option) */
"icmp", /* 1 (IPPROTO_ICMP, Internet Control Message) */
"igmp", /* 2 (IPPROTO_IGMP, Internet Group Management) */
"ggp", /* 3 (Gateway-to-Gateway) */
"ipencap", /* 4 (IPPROTO_IPV4, IPv4 encapsulation) */
"st", /* 5 (Stream, ST datagram mode) */
"tcp", /* 6 (IPPROTO_TCP, Transmission Control) */
"cbt", /* 7 (CBT) */
"egp", /* 8 (IPPROTO_EGP, Exterior Gateway Protocol) */
"igp", /* 9 (IPPROTO_PIGP, "any private interior gateway
* (used by Cisco for their IGRP)")
*/
"bbn-rcc-mon", /* 10 (BBN RCC Monitoring) */
"nvp-ii", /* 11 (Network Voice Protocol) */
"pup", /* 12 (PARC universal packet protocol) */
"argus", /* 13 (ARGUS) */
"emcon", /* 14 (EMCON) */
"xnet", /* 15 (Cross Net Debugger) */
"chaos", /* 16 (Chaos) */
"udp", /* 17 (IPPROTO_UDP, User Datagram) */
"mux", /* 18 (Multiplexing) */
"dcn-meas", /* 19 (DCN Measurement Subsystems) */
"hmp", /* 20 (Host Monitoring) */
"prm", /* 21 (Packet Radio Measurement) */
"xns-idp", /* 22 (XEROX NS IDP) */
"trunk-1", /* 23 (Trunk-1) */
"trunk-2", /* 24 (Trunk-2) */
"leaf-1", /* 25 (Leaf-1) */
"leaf-2", /* 26 (Leaf-2) */
"rdp", /* 27 (Reliable Data Protocol) */
"irtp", /* 28 (Internet Reliable Transaction) */
"iso-tp4", /* 29 (ISO Transport Protocol Class 4) */
"netblt", /* 30 (Bulk Data Transfer Protocol) */
"mfe-nsp", /* 31 (MFE Network Services Protocol) */
"merit-inp", /* 32 (MERIT Internodal Protocol) */
"dccp", /* 33 (IPPROTO_DCCP, Datagram Congestion
* Control Protocol)
*/
"3pc", /* 34 (Third Party Connect Protocol) */
"idpr", /* 35 (Inter-Domain Policy Routing Protocol) */
"xtp", /* 36 (Xpress Transfer Protocol) */
"ddp", /* 37 (Datagram Delivery Protocol) */
"idpr-cmtp", /* 38 (IDPR Control Message Transport Proto) */
"tp++", /* 39 (TP++ Transport Protocol) */
"il", /* 40 (IL Transport Protocol) */
"ipv6", /* 41 (IPPROTO_IPV6, IPv6 encapsulation) */
"sdrp", /* 42 (Source Demand Routing Protocol) */
"ipv6-route", /* 43 (IPPROTO_ROUTING, Routing Header for IPv6) */
"ipv6-frag", /* 44 (IPPROTO_FRAGMENT, Fragment Header for
* IPv6)
*/
"idrp", /* 45 (Inter-Domain Routing Protocol) */
"rsvp", /* 46 (IPPROTO_RSVP, Reservation Protocol) */
"gre", /* 47 (IPPROTO_GRE, Generic Routing
* Encapsulation)
*/
"dsr", /* 48 (Dynamic Source Routing Protocol) */
"bna", /* 49 (BNA) */
"esp", /* 50 (IPPROTO_ESP, Encap Security Payload) */
"ah", /* 51 (IPPROTO_AH, Authentication Header) */
"i-nlsp", /* 52 (Integrated Net Layer Security TUBA) */
"swipe", /* 53 (IP with Encryption) */
"narp", /* 54 (NBMA Address Resolution Protocol) */
"mobile", /* 55 (IPPROTO_MOBILE, IP Mobility) */
"tlsp", /* 56 (Transport Layer Security Protocol using
* Kryptonet key management)
*/
"skip", /* 57 (SKIP) */
"ipv6-icmp", /* 58 (IPPROTO_ICMPV6, ICMP for IPv6) */
"ipv6-nonxt", /* 59 (IPPROTO_NONE, No Next Header for IPv6) */
"ipv6-opts", /* 60 (IPPROTO_DSTOPTS, Destination Options for
* IPv6)
*/
NULL, /* 61 (any host internal protocol) */
"cftp", /* 62 (IPPROTO_MOBILITY_OLD, CFTP, see the note
* in ipproto.h)
*/
NULL, /* 63 (any local network) */
"sat-expak", /* 64 (SATNET and Backroom EXPAK) */
"kryptolan", /* 65 (Kryptolan) */
"rvd", /* 66 (MIT Remote Virtual Disk Protocol) */
"ippc", /* 67 (Internet Pluribus Packet Core) */
NULL, /* 68 (any distributed file system) */
"sat-mon", /* 69 (SATNET Monitoring) */
"visa", /* 70 (VISA Protocol) */
"ipcv", /* 71 (Internet Packet Core Utility) */
"cpnx", /* 72 (Computer Protocol Network Executive) */
"rspf", /* 73 (Radio Shortest Path First, CPHB -- Computer
* Protocol Heart Beat -- in IANA)
*/
"wsn", /* 74 (Wang Span Network) */
"pvp", /* 75 (Packet Video Protocol) */
"br-sat-mon", /* 76 (Backroom SATNET Monitoring) */
"sun-nd", /* 77 (IPPROTO_ND, SUN ND PROTOCOL-Temporary) */
"wb-mon", /* 78 (WIDEBAND Monitoring) */
"wb-expak", /* 79 (WIDEBAND EXPAK) */
"iso-ip", /* 80 (ISO Internet Protocol) */
"vmtp", /* 81 (Versatile Message Transport) */
"secure-vmtp", /* 82 (Secure VMTP) */
"vines", /* 83 (VINES) */
"ttp", /* 84 (Transaction Transport Protocol, also IPTM --
* Internet Protocol Traffic Manager)
*/
"nsfnet-igp", /* 85 (NSFNET-IGP) */
"dgp", /* 86 (Dissimilar Gateway Protocol) */
"tcf", /* 87 (TCF) */
"eigrp", /* 88 (IPPROTO_EIGRP, Cisco EIGRP) */
"ospf", /* 89 (IPPROTO_OSPF, Open Shortest Path First
* IGP)
*/
"sprite-rpc", /* 90 (Sprite RPC Protocol) */
"larp", /* 91 (Locus Address Resolution Protocol) */
"mtp", /* 92 (Multicast Transport Protocol) */
"ax.25", /* 93 (AX.25 Frames) */
"ipip", /* 94 (IP-within-IP Encapsulation Protocol) */
"micp", /* 95 (Mobile Internetworking Control Pro.) */
"scc-sp", /* 96 (Semaphore Communications Sec. Pro.) */
"etherip", /* 97 (Ethernet-within-IP Encapsulation) */
"encap", /* 98 (Encapsulation Header) */
NULL, /* 99 (any private encryption scheme) */
"gmtp", /* 100 (GMTP) */
"ifmp", /* 101 (Ipsilon Flow Management Protocol) */
"pnni", /* 102 (PNNI over IP) */
"pim", /* 103 (IPPROTO_PIM, Protocol Independent
* Multicast)
*/
"aris", /* 104 (ARIS) */
"scps", /* 105 (SCPS) */
"qnx", /* 106 (QNX) */
"a/n", /* 107 (Active Networks) */
"ipcomp", /* 108 (IPPROTO_IPCOMP, IP Payload Compression
* Protocol)
*/
"snp", /* 109 (Sitara Networks Protocol) */
"compaq-peer", /* 110 (Compaq Peer Protocol) */
"ipx-in-ip", /* 111 (IPX in IP) */
"vrrp", /* 112 (IPPROTO_VRRP, Virtual Router Redundancy
* Protocol)
*/
"pgm", /* 113 (IPPROTO_PGM, PGM Reliable Transport
* Protocol)
*/
NULL, /* 114 (any 0-hop protocol) */
"l2tp", /* 115 (Layer Two Tunneling Protocol) */
"ddx", /* 116 (D-II Data Exchange (DDX)) */
"iatp", /* 117 (Interactive Agent Transfer Protocol) */
"stp", /* 118 (Schedule Transfer Protocol) */
"srp", /* 119 (SpectraLink Radio Protocol) */
"uti", /* 120 (UTI) */
"smp", /* 121 (Simple Message Protocol) */
"sm", /* 122 (Simple Multicast Protocol) */
"ptp", /* 123 (Performance Transparency Protocol) */
"isis", /* 124 (ISIS over IPv4) */
"fire", /* 125 (FIRE) */
"crtp", /* 126 (Combat Radio Transport Protocol) */
"crudp", /* 127 (Combat Radio User Datagram) */
"sscopmce", /* 128 (SSCOPMCE) */
"iplt", /* 129 (IPLT) */
"sps", /* 130 (Secure Packet Shield) */
"pipe", /* 131 (Private IP Encapsulation within IP) */
"sctp", /* 132 (IPPROTO_SCTP, Stream Control Transmission
* Protocol)
*/
"fc", /* 133 (Fibre Channel) */
"rsvp-e2e-ignore", /* 134 (RSVP-E2E-IGNORE) */
"mobility-header", /* 135 (IPPROTO_MOBILITY, Mobility Header) */
"udplite", /* 136 (UDPLite) */
"mpls-in-ip", /* 137 (MPLS-in-IP) */
"manet", /* 138 (MANET Protocols) */
"hip", /* 139 (Host Identity Protocol) */
"shim6", /* 140 (Shim6 Protocol) */
"wesp", /* 141 (Wrapped Encapsulating Security Payload) */
"rohc", /* 142 (Robust Header Compression) */
NULL, /* 143 (unassigned) */
NULL, /* 144 (unassigned) */
NULL, /* 145 (unassigned) */
NULL, /* 146 (unassigned) */
NULL, /* 147 (unassigned) */
NULL, /* 148 (unassigned) */
NULL, /* 149 (unassigned) */
NULL, /* 150 (unassigned) */
NULL, /* 151 (unassigned) */
NULL, /* 152 (unassigned) */
NULL, /* 153 (unassigned) */
NULL, /* 154 (unassigned) */
NULL, /* 155 (unassigned) */
NULL, /* 156 (unassigned) */
NULL, /* 157 (unassigned) */
NULL, /* 158 (unassigned) */
NULL, /* 159 (unassigned) */
NULL, /* 160 (unassigned) */
NULL, /* 161 (unassigned) */
NULL, /* 162 (unassigned) */
NULL, /* 163 (unassigned) */
NULL, /* 164 (unassigned) */
NULL, /* 165 (unassigned) */
NULL, /* 166 (unassigned) */
NULL, /* 167 (unassigned) */
NULL, /* 168 (unassigned) */
NULL, /* 169 (unassigned) */
NULL, /* 170 (unassigned) */
NULL, /* 171 (unassigned) */
NULL, /* 172 (unassigned) */
NULL, /* 173 (unassigned) */
NULL, /* 174 (unassigned) */
NULL, /* 175 (unassigned) */
NULL, /* 176 (unassigned) */
NULL, /* 177 (unassigned) */
NULL, /* 178 (unassigned) */
NULL, /* 179 (unassigned) */
NULL, /* 180 (unassigned) */
NULL, /* 181 (unassigned) */
NULL, /* 182 (unassigned) */
NULL, /* 183 (unassigned) */
NULL, /* 184 (unassigned) */
NULL, /* 185 (unassigned) */
NULL, /* 186 (unassigned) */
NULL, /* 187 (unassigned) */
NULL, /* 188 (unassigned) */
NULL, /* 189 (unassigned) */
NULL, /* 190 (unassigned) */
NULL, /* 191 (unassigned) */
NULL, /* 192 (unassigned) */
NULL, /* 193 (unassigned) */
NULL, /* 194 (unassigned) */
NULL, /* 195 (unassigned) */
NULL, /* 196 (unassigned) */
NULL, /* 197 (unassigned) */
NULL, /* 198 (unassigned) */
NULL, /* 199 (unassigned) */
NULL, /* 200 (unassigned) */
NULL, /* 201 (unassigned) */
NULL, /* 202 (unassigned) */
NULL, /* 203 (unassigned) */
NULL, /* 204 (unassigned) */
NULL, /* 205 (unassigned) */
NULL, /* 206 (unassigned) */
NULL, /* 207 (unassigned) */
NULL, /* 208 (unassigned) */
NULL, /* 209 (unassigned) */
NULL, /* 210 (unassigned) */
NULL, /* 211 (unassigned) */
NULL, /* 212 (unassigned) */
NULL, /* 213 (unassigned) */
NULL, /* 214 (unassigned) */
NULL, /* 215 (unassigned) */
NULL, /* 216 (unassigned) */
NULL, /* 217 (unassigned) */
NULL, /* 218 (unassigned) */
NULL, /* 219 (unassigned) */
NULL, /* 220 (unassigned) */
NULL, /* 221 (unassigned) */
NULL, /* 222 (unassigned) */
NULL, /* 223 (unassigned) */
NULL, /* 224 (unassigned) */
NULL, /* 225 (unassigned) */
NULL, /* 226 (unassigned) */
NULL, /* 227 (unassigned) */
NULL, /* 228 (unassigned) */
NULL, /* 229 (unassigned) */
NULL, /* 230 (unassigned) */
NULL, /* 231 (unassigned) */
NULL, /* 232 (unassigned) */
NULL, /* 233 (unassigned) */
NULL, /* 234 (unassigned) */
NULL, /* 235 (unassigned) */
NULL, /* 236 (unassigned) */
NULL, /* 237 (unassigned) */
NULL, /* 238 (unassigned) */
NULL, /* 239 (unassigned) */
NULL, /* 240 (unassigned) */
NULL, /* 241 (unassigned) */
NULL, /* 242 (unassigned) */
NULL, /* 243 (unassigned) */
NULL, /* 244 (unassigned) */
NULL, /* 245 (unassigned) */
NULL, /* 246 (unassigned) */
NULL, /* 247 (unassigned) */
NULL, /* 248 (unassigned) */
NULL, /* 249 (unassigned) */
NULL, /* 250 (unassigned) */
NULL, /* 251 (unassigned) */
NULL, /* 252 (unassigned) */
"exptest-253", /* 253 (Use for experimentation and testing,
* RFC 3692)
*/
"exptest-254", /* 254 (Use for experimentation and testing,
* RFC 3692)
*/
"reserved", /* 255 (reserved) */
};
/* The function enforces the array index to be 8-bit. */
const char *
netdb_protoname (const uint8_t protoid)
{
return netdb_protocol_names[protoid];
}
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