"ip_proto" parameter in Tacker VNF Forwarding Graph TOSCA template

Here are the list of the available values of the "ip_proto" (IP Protocol number) in the TOSCA template for the Tacker VNF Forwarding Graph:
Decimal Keyword Protocol IPv6 Extension Header Reference
0 HOPOPT IPv6 Hop-by-Hop Option Y [RFC8200]
1 ICMP Internet Control Message [RFC792]
2 IGMP Internet Group Management [RFC1112]
3 GGP Gateway-to-Gateway [RFC823]
4 IPv4 IPv4 encapsulation [RFC2003]
5 ST Stream [RFC1190][RFC1819]
6 TCP Transmission Control [RFC793]
7 CBT CBT [Tony_Ballardie]
8 EGP Exterior Gateway Protocol [RFC888][David_Mills]
9 IGP any private interior gateway (used by Cisco for their IGRP) [Internet_Assigned_Numbers_Authority]
10 BBN-RCC-MON BBN RCC Monitoring [Steve_Chipman]
11 NVP-II Network Voice Protocol [RFC741][Steve_Casner]
12 PUP PUP [Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An Internetwork Architecture", XEROX Palo Alto Research Center, CSL-79-10, July 1979; also in IEEE Transactions on Communication, Volume COM-28, Number 4, April 1980.][[XEROX]]
13 ARGUS (deprecated) ARGUS [Robert_W_Scheifler]
14 EMCON EMCON [<mystery contact>]
15 XNET Cross Net Debugger [Haverty, J., "XNET Formats for Internet Protocol Version 4", IEN 158, October 1980.][Jack_Haverty]
16 CHAOS Chaos [J_Noel_Chiappa]
17 UDP User Datagram [RFC768][Jon_Postel]
18 MUX Multiplexing [Cohen, D. and J. Postel, "Multiplexing Protocol", IEN 90, USC/Information Sciences Institute, May 1979.][Jon_Postel]
19 DCN-MEAS DCN Measurement Subsystems [David_Mills]
20 HMP Host Monitoring [RFC869][Bob_Hinden]
21 PRM Packet Radio Measurement [Zaw_Sing_Su]
22 XNS-IDP XEROX NS IDP ["The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specification", AA-K759B-TK, Digital Equipment Corporation, Maynard, MA. Also as: "The Ethernet - A Local Area Network", Version 1.0, Digital Equipment Corporation, Intel Corporation, Xerox Corporation, September 1980. And: "The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specifications", Digital, Intel and Xerox, November 1982. And: XEROX, "The Ethernet, A Local Area Network: Data Link Layer and Physical Layer Specification", X3T51/80-50, Xerox Corporation, Stamford, CT., October 1980.][[XEROX]]
23 TRUNK-1 Trunk-1 [Barry_Boehm]
24 TRUNK-2 Trunk-2 [Barry_Boehm]
25 LEAF-1 Leaf-1 [Barry_Boehm]
26 LEAF-2 Leaf-2 [Barry_Boehm]
27 RDP Reliable Data Protocol [RFC908][Bob_Hinden]
28 IRTP Internet Reliable Transaction [RFC938][Trudy_Miller]
29 ISO-TP4 ISO Transport Protocol Class 4 [RFC905][<mystery contact>]
30 NETBLT Bulk Data Transfer Protocol [RFC969][David_Clark]
31 MFE-NSP 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]
32 MERIT-INP MERIT Internodal Protocol [Hans_Werner_Braun]
33 DCCP Datagram Congestion Control Protocol [RFC4340]
34 3PC Third Party Connect Protocol [Stuart_A_Friedberg]
35 IDPR Inter-Domain Policy Routing Protocol [Martha_Steenstrup]
36 XTP XTP [Greg_Chesson]
37 DDP Datagram Delivery Protocol [Wesley_Craig]
38 IDPR-CMTP IDPR Control Message Transport Proto [Martha_Steenstrup]
39 TP++ TP++ Transport Protocol [Dirk_Fromhein]
40 IL IL Transport Protocol [Dave_Presotto]
41 IPv6 IPv6 encapsulation [RFC2473]
42 SDRP Source Demand Routing Protocol [Deborah_Estrin]
43 IPv6-Route Routing Header for IPv6 Y [Steve_Deering]
44 IPv6-Frag Fragment Header for IPv6 Y [Steve_Deering]
45 IDRP Inter-Domain Routing Protocol [Sue_Hares]
46 RSVP Reservation Protocol [RFC2205][RFC3209][Bob_Braden]
47 GRE Generic Routing Encapsulation [RFC2784][Tony_Li]
48 DSR Dynamic Source Routing Protocol [RFC4728]
49 BNA BNA [Gary Salamon]
50 ESP Encap Security Payload Y [RFC4303]
51 AH Authentication Header Y [RFC4302]
52 I-NLSP Integrated Net Layer Security TUBA [K_Robert_Glenn]
53 SWIPE (deprecated) IP with Encryption [John_Ioannidis]
54 NARP NBMA Address Resolution Protocol [RFC1735]
55 MOBILE IP Mobility [Charlie_Perkins]
56 TLSP Transport Layer Security Protocol using Kryptonet key management [Christer_Oberg]
57 SKIP SKIP [Tom_Markson]
58 IPv6-ICMP ICMP for IPv6 [RFC8200]
59 IPv6-NoNxt No Next Header for IPv6 [RFC8200]
60 IPv6-Opts Destination Options for IPv6 Y [RFC8200]
61 any host internal protocol [Internet_Assigned_Numbers_Authority]
62 CFTP CFTP [Forsdick, H., "CFTP", Network Message, Bolt Beranek and Newman, January 1982.][Harry_Forsdick]
63 any local network [Internet_Assigned_Numbers_Authority]
64 SAT-EXPAK SATNET and Backroom EXPAK [Steven_Blumenthal]
65 KRYPTOLAN Kryptolan [Paul Liu]
66 RVD MIT Remote Virtual Disk Protocol [Michael_Greenwald]
67 IPPC Internet Pluribus Packet Core [Steven_Blumenthal]
68 any distributed file system [Internet_Assigned_Numbers_Authority]
69 SAT-MON SATNET Monitoring [Steven_Blumenthal]
70 VISA VISA Protocol [Gene_Tsudik]
71 IPCV Internet Packet Core Utility [Steven_Blumenthal]
72 CPNX Computer Protocol Network Executive [David Mittnacht]
73 CPHB Computer Protocol Heart Beat [David Mittnacht]
74 WSN Wang Span Network [Victor Dafoulas]
75 PVP Packet Video Protocol [Steve_Casner]
76 BR-SAT-MON Backroom SATNET Monitoring [Steven_Blumenthal]
77 SUN-ND SUN ND PROTOCOL-Temporary [William_Melohn]
78 WB-MON WIDEBAND Monitoring [Steven_Blumenthal]
79 WB-EXPAK WIDEBAND EXPAK [Steven_Blumenthal]
80 ISO-IP ISO Internet Protocol [Marshall_T_Rose]
81 VMTP VMTP [Dave_Cheriton]
82 SECURE-VMTP SECURE-VMTP [Dave_Cheriton]
83 VINES VINES [Brian Horn]
84 TTP Transaction Transport Protocol [Jim_Stevens]
84 IPTM Internet Protocol Traffic Manager [Jim_Stevens]
85 NSFNET-IGP NSFNET-IGP [Hans_Werner_Braun]
86 DGP Dissimilar Gateway Protocol [M/A-COM Government Systems, "Dissimilar Gateway Protocol Specification, Draft Version", Contract no. CS901145, November 16, 1987.][Mike_Little]
87 TCF TCF [Guillermo_A_Loyola]
88 EIGRP EIGRP [RFC7868]
89 OSPFIGP OSPFIGP [RFC1583][RFC2328][RFC5340][John_Moy]
90 Sprite-RPC 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]
91 LARP Locus Address Resolution Protocol [Brian Horn]
92 MTP Multicast Transport Protocol [Susie_Armstrong]
93 AX.25 AX.25 Frames [Brian_Kantor]
94 IPIP IP-within-IP Encapsulation Protocol [John_Ioannidis]
95 MICP (deprecated) Mobile Internetworking Control Pro. [John_Ioannidis]
96 SCC-SP Semaphore Communications Sec. Pro. [Howard_Hart]
97 ETHERIP Ethernet-within-IP Encapsulation [RFC3378]
98 ENCAP Encapsulation Header [RFC1241][Robert_Woodburn]
99 any private encryption scheme [Internet_Assigned_Numbers_Authority]
100 GMTP GMTP [[RXB5]]
101 IFMP Ipsilon Flow Management Protocol [Bob_Hinden][November 1995, 1997.]
102 PNNI PNNI over IP [Ross_Callon]
103 PIM Protocol Independent Multicast [RFC7761][Dino_Farinacci]
104 ARIS ARIS [Nancy_Feldman]
105 SCPS SCPS [Robert_Durst]
106 QNX QNX [Michael_Hunter]
107 A/N Active Networks [Bob_Braden]
108 IPComp IP Payload Compression Protocol [RFC2393]
109 SNP Sitara Networks Protocol [Manickam_R_Sridhar]
110 Compaq-Peer Compaq Peer Protocol [Victor_Volpe]
111 IPX-in-IP IPX in IP [CJ_Lee]
112 VRRP Virtual Router Redundancy Protocol [RFC5798]
113 PGM PGM Reliable Transport Protocol [Tony_Speakman]
114 any 0-hop protocol [Internet_Assigned_Numbers_Authority]
115 L2TP Layer Two Tunneling Protocol [RFC3931][Bernard_Aboba]
116 DDX D-II Data Exchange (DDX) [John_Worley]
117 IATP Interactive Agent Transfer Protocol [John_Murphy]
118 STP Schedule Transfer Protocol [Jean_Michel_Pittet]
119 SRP SpectraLink Radio Protocol [Mark_Hamilton]
120 UTI UTI [Peter_Lothberg]
121 SMP Simple Message Protocol [Leif_Ekblad]
122 SM (deprecated) Simple Multicast Protocol [Jon_Crowcroft][draft-perlman-simple-multicast]
123 PTP Performance Transparency Protocol [Michael_Welzl]
124 ISIS over IPv4 [Tony_Przygienda]
125 FIRE [Criag_Partridge]
126 CRTP Combat Radio Transport Protocol [Robert_Sautter]
127 CRUDP Combat Radio User Datagram [Robert_Sautter]
128 SSCOPMCE [Kurt_Waber]
129 IPLT [[Hollbach]]
130 SPS Secure Packet Shield [Bill_McIntosh]
131 PIPE Private IP Encapsulation within IP [Bernhard_Petri]
132 SCTP Stream Control Transmission Protocol [Randall_R_Stewart]
133 FC Fibre Channel [Murali_Rajagopal][RFC6172]
134 RSVP-E2E-IGNORE [RFC3175]
135 Mobility Header Y [RFC6275]
136 UDPLite [RFC3828]
137 MPLS-in-IP [RFC4023]
138 manet MANET Protocols [RFC5498]
139 HIP Host Identity Protocol Y [RFC7401]
140 Shim6 Shim6 Protocol Y [RFC5533]
141 WESP Wrapped Encapsulating Security Payload [RFC5840]
142 ROHC Robust Header Compression [RFC5858]
143-252 Unassigned [Internet_Assigned_Numbers_Authority]
253 Use for experimentation and testing Y [RFC3692]
254 Use for experimentation and testing Y [RFC3692]
255 Reserved [Internet_Assigned_Numbers_Authority]

For example, we have this TOSCA template, the "ip_proto" here is 6 which means TCP:
Forwarding_path1:
  type: tosca.nodes.nfv.FP
  id: 51
  description: creates path (CP11->CP12->CP32)
  properties:
    policy:
      type: ACL
      criteria:
        - neutron_net_name: tenant1_net
        - dest_port_range: 80-1024
        - ip_proto: 6
        - ip_dest: 192.168.1.2
  requirements:
    - forwarder: VNF1
      capability: CP11
    - forwarder: VNF1
      capability: CP12
    - forwarder: VNF3
      capability: CP32

groups:
  VNFFG1:
    type: tosca.groups.nfv.VNFFG
    description: HTTP to Corporate Net
    properties:
      vendor: tacker
      version: 1.0
      number_of_endpoints: 2
      dependent_virtual_link: [VL1,VL2,VL3]
      connection_point: [CP11,CP12,CP32]
      constituent_vnfs: [VNF1,VNF3]
    members: [Forwarding_path1]


Reference:
https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
https://specs.openstack.org/openstack/tacker-specs/specs/newton/tacker-vnffg.html
https://specs.openstack.org/openstack/tacker-specs/specs/archive/liberty/tacker-sfc.html

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