定义TCP协议号的是哪个文件？
我记得内核里有定义ＴＣＰ协议号为6，ＵＤＰ协议号为17的一个头文件。但叫什么名字我想不起来了。
今天要查一些其它类型协议的协议号。。。。找了半天没找着这个文件，请大家赐教！
[解决办法]
include/linux/in.h
不知是否这个
enum { IPPROTO_IP = 0, /* Dummy protocol for TCP */ IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ IPPROTO_IGMP = 2, /* Internet Group Management Protocol */ IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ IPPROTO_TCP = 6, /* Transmission Control Protocol */ IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ IPPROTO_PUP = 12, /* PUP protocol */ IPPROTO_UDP = 17, /* User Datagram Protocol */ IPPROTO_IDP = 22, /* XNS IDP protocol */ IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ IPPROTO_RSVP = 46, /* RSVP protocol */ IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ IPPROTO_AH = 51, /* Authentication Header protocol */ IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */ IPPROTO_PIM = 103, /* Protocol Independent Multicast */ IPPROTO_COMP = 108, /* Compression Header protocol */ IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */ IPPROTO_RAW = 255, /* Raw IP packets */ IPPROTO_MAX};