从FreeBSD里面看到的网络协议列表，感觉可以保存一下

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#
# Internet protocols
#
# $FreeBSD$
#   from: @(#)protocols 5.1 (Berkeley) 4/17/89
#
# See also http://www.iana.org/assignments/protocol-numbers
#
ip  0   IP      # internet protocol, pseudo protocol number
#hopopt 0   HOPOPT      # hop-by-hop options for ipv6
icmp    1   ICMP        # internet control message protocol
igmp    2   IGMP        # internet group management protocol
ggp 3   GGP     # gateway-gateway protocol
ipencap 4   IP-ENCAP    # IP encapsulated in IP (officially ``IP'')
st2 5   ST2     # ST2 datagram mode (RFC 1819) (officially ``ST'')
tcp 6   TCP     # transmission control protocol
cbt 7   CBT     # CBT, Tony Ballardie <A.Ballardie@cs.ucl.ac.uk>
egp 8   EGP     # exterior gateway protocol
igp 9   IGP     # any private interior gateway (Cisco: for IGRP)
bbn-rcc 10  BBN-RCC-MON # BBN RCC Monitoring
nvp 11  NVP-II      # Network Voice Protocol
pup 12  PUP     # PARC universal packet protocol
argus   13  ARGUS       # ARGUS
emcon   14  EMCON       # EMCON
xnet    15  XNET        # Cross Net Debugger
chaos   16  CHAOS       # Chaos
udp 17  UDP     # user datagram protocol
mux 18  MUX     # Multiplexing protocol
dcn 19  DCN-MEAS    # DCN Measurement Subsystems
hmp 20  HMP     # host monitoring protocol
prm 21  PRM     # packet radio measurement protocol
xns-idp 22  XNS-IDP     # Xerox NS IDP
trunk-1 23  TRUNK-1     # Trunk-1
trunk-2 24  TRUNK-2     # Trunk-2
leaf-1  25  LEAF-1      # Leaf-1
leaf-2  26  LEAF-2      # Leaf-2
rdp 27  RDP     # "reliable datagram" protocol
irtp    28  IRTP        # Internet Reliable Transaction Protocol
iso-tp4 29  ISO-TP4     # ISO Transport Protocol Class 4
netblt  30  NETBLT      # Bulk Data Transfer Protocol
mfe-nsp 31  MFE-NSP     # MFE Network Services Protocol
merit-inp   32  MERIT-INP   # MERIT Internodal Protocol
dccp    33  DCCP        # Datagram Congestion Control Protocol
3pc 34  3PC     # Third Party Connect Protocol
idpr    35  IDPR        # Inter-Domain Policy Routing Protocol
xtp 36  XTP     # Xpress Transfer Protocol
ddp 37  DDP     # Datagram Delivery Protocol
idpr-cmtp   38  IDPR-CMTP   # IDPR Control Message Transport Proto
tp++    39  TP++        # TP++ Transport Protocol
il  40  IL      # IL Transport Protocol
ipv6    41  IPV6        # ipv6
sdrp    42  SDRP        # Source Demand Routing Protocol
ipv6-route  43  IPV6-ROUTE  # routing header for ipv6
ipv6-frag   44  IPV6-FRAG   # fragment header for ipv6
idrp    45  IDRP        # Inter-Domain Routing Protocol
rsvp    46  RSVP        # Resource ReSerVation Protocol
gre 47  GRE     # Generic Routing Encapsulation
dsr 48  DSR     # Dynamic Source Routing Protocol
bna 49  BNA     # BNA
esp 50  ESP     # encapsulating security payload
ah  51  AH      # authentication header
i-nlsp  52  I-NLSP      # Integrated Net Layer Security TUBA
swipe   53  SWIPE       # IP with Encryption
narp    54  NARP        # NBMA Address Resolution Protocol
mobile  55  MOBILE      # IP Mobility
tlsp    56  TLSP        # Transport Layer Security Protocol
skip    57  SKIP        # SKIP
ipv6-icmp   58  IPV6-ICMP   icmp6   # ICMP for IPv6
ipv6-nonxt  59  IPV6-NONXT  # no next header for ipv6
ipv6-opts   60  IPV6-OPTS   # destination options for ipv6
#   61          # any host internal protocol
cftp    62  CFTP        # CFTP
#   63          # any local network
sat-expak   64  SAT-EXPAK   # SATNET and Backroom EXPAK
kryptolan   65  KRYPTOLAN   # Kryptolan
rvd 66  RVD     # MIT Remote Virtual Disk Protocol
ippc    67  IPPC        # Internet Pluribus Packet Core
#   68          # any distributed filesystem
sat-mon 69  SAT-MON     # SATNET Monitoring
visa    70  VISA        # VISA Protocol
ipcv    71  IPCV        # Internet Packet Core Utility
cpnx    72  CPNX        # Computer Protocol Network Executive
cphb    73  CPHB        # Computer Protocol Heart Beat
wsn 74  WSN     # Wang Span Network
pvp 75  PVP     # Packet Video Protocol
br-sat-mon  76  BR-SAT-MON  # Backroom SATNET Monitoring
sun-nd  77  SUN-ND      # SUN ND PROTOCOL-Temporary
wb-mon  78  WB-MON      # WIDEBAND Monitoring
wb-expak    79  WB-EXPAK    # WIDEBAND EXPAK
iso-ip  80  ISO-IP      # ISO Internet Protocol
vmtp    81  VMTP        # Versatile Message Transport
secure-vmtp 82  SECURE-VMTP # SECURE-VMTP
vines   83  VINES       # VINES
ttp 84  TTP     # TTP
#iptm   84  IPTM        # Protocol Internet Protocol Traffic
nsfnet-igp  85  NSFNET-IGP  # NSFNET-IGP
dgp 86  DGP     # Dissimilar Gateway Protocol
tcf 87  TCF     # TCF
eigrp   88  EIGRP       # Enhanced Interior Routing Protocol (Cisco)
ospf    89  OSPFIGP     # Open Shortest Path First IGP
sprite-rpc  90  Sprite-RPC  # Sprite RPC Protocol
larp    91  LARP        # Locus Address Resolution Protocol
mtp 92  MTP     # Multicast Transport Protocol
ax.25   93  AX.25       # AX.25 Frames
ipip    94  IPIP        # Yet Another IP encapsulation
micp    95  MICP        # Mobile Internetworking Control Pro.
scc-sp  96  SCC-SP      # Semaphore Communications Sec. Pro.
etherip 97  ETHERIP     # Ethernet-within-IP Encapsulation
encap   98  ENCAP       # Yet Another IP encapsulation
#   99          # any private encryption scheme
gmtp    100 GMTP        # GMTP
ifmp    101 IFMP        # Ipsilon Flow Management Protocol
pnni    102 PNNI        # PNNI over IP
pim 103 PIM     # Protocol Independent Multicast
aris    104 ARIS        # ARIS
scps    105 SCPS        # SCPS
qnx 106 QNX     # QNX
a/n 107 A/N     # Active Networks
ipcomp  108 IPComp      # IP Payload Compression Protocol
snp 109 SNP     # Sitara Networks Protocol
compaq-peer 110 Compaq-Peer # Compaq Peer Protocol
ipx-in-ip   111 IPX-in-IP   # IPX in IP
carp    112 CARP    vrrp        # Common Address Redundancy Protocol
pgm 113 PGM     # PGM Reliable Transport Protocol
#   114         # any 0-hop protocol
l2tp    115 L2TP        # Layer Two Tunneling Protocol
ddx 116 DDX     # D-II Data Exchange
iatp    117 IATP        # Interactive Agent Transfer Protocol
stp 118 STP     # Schedule Transfer Protocol
srp 119 SRP     # SpectraLink Radio Protocol
uti 120 UTI     # UTI
smp 121 SMP     # Simple Message Protocol
sm  122 SM      # SM
ptp 123 PTP     # Performance Transparency Protocol
isis    124 ISIS        # ISIS over IPv4
fire    125 FIRE
crtp    126 CRTP        # Combat Radio Transport Protocol
crudp   127 CRUDP       # Combat Radio User Datagram
sscopmce    128 SSCOPMCE
iplt    129 IPLT
sps 130 SPS     # Secure Packet Shield
pipe    131 PIPE        # Private IP Encapsulation within IP
sctp    132 SCTP        # Stream Control Transmission Protocol
fc  133 FC      # Fibre Channel
rsvp-e2e-ignore 134 RSVP-E2E-IGNORE # Aggregation of RSVP for IP reservations
mobility-header 135 Mobility-Header # Mobility Support in IPv6
udplite 136 UDPLite     # The UDP-Lite Protocol
mpls-in-ip  137 MPLS-IN-IP  # Encapsulating MPLS in IP
manet   138 MANET       # MANET Protocols (RFC5498)
hip 139 HIP     # Host Identity Protocol (RFC5201)
shim6   140 SHIM6       # Shim6 Protocol (RFC5533)
wesp    141 WESP        # Wrapped Encapsulating Security Payload (RFC5840)
rohc    142 ROHC        # Robust Header Compression (RFC5858)
#   138-254         # Unassigned
pfsync  240 PFSYNC      # PF Synchronization
#   253-254         # Use for experimentation and testing (RFC3692)
#   255         # Reserved
divert  258 DIVERT      # Divert pseudo-protocol [non IANA]