family：
/* Supported address families. */
#define AF_UNSPEC 0
#define AF_UNIX 1/* Unix domain sockets
*/
#define AF_LOCAL 1/* POSIX name for AF_UNIX
*/
#define AF_INET 2/* Internet IP Protocol
*/
#define AF_AX25 3/* Amateur Radio AX.25
*/
#define AF_IPX 4/* Novell IPX
*/
#define AF_APPLETALK 5/* AppleTalk DDP
*/
#define AF_NETROM 6/* Amateur Radio NET/ROM
*/
#define AF_BRIDGE 7/* Multiprotocol bridge
*/
#define AF_ATMPVC 8/* ATM PVCs
*/
#define AF_X25 9/* Reserved for X.25 project
*/
#define AF_INET6 10/* IP version 6
*/
#define AF_ROSE 11/* Amateur Radio X.25 PLP
*/
#define AF_DECnet 12/* Reserved for DECnet project
*/
#define AF_NETBEUI 13/* Reserved for 802.2LLC project*/
#define AF_SECURITY 14/* Security callback pseudo AF */
#define AF_KEY 15 /* PF_KEY key management API */
#define AF_NETLINK 16
#define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
#define AF_PACKET 17/* Packet family
*/
#define AF_ASH 18/* Ash
*/
#define AF_ECONET 19/* Acorn Econet
*/
#define AF_ATMSVC 20/* ATM SVCs
*/
#define AF_RDS 21/* RDS sockets
*/
#define AF_SNA 22/* Linux SNA Project (nutters!) */
#define AF_IRDA 23/* IRDA sockets
*/
#define AF_PPPOX 24/* PPPoX sockets
*/
#define AF_WANPIPE 25/* Wanpipe API Sockets */
#define AF_LLC 26/* Linux LLC
*/
#define AF_IB 27/* Native InfiniBand address
*/
#define AF_CAN 29/* Controller Area Network */
#define AF_TIPC 30/* TIPC sockets
*/
#define AF_BLUETOOTH 31/* Bluetooth sockets
*/
#define AF_IUCV 32/* IUCV sockets
*/
#define AF_RXRPC 33/* RxRPC sockets
*/
#define AF_ISDN 34/* mISDN sockets
*/
#define AF_PHONET 35/* Phonet sockets
*/
#define AF_IEEE802154 36/* IEEE802154 sockets
*/
#define AF_CAIF 37/* CAIF sockets
*/
#define AF_ALG 38/* Algorithm sockets
*/
#define AF_NFC 39/* NFC sockets
*/
#define AF_VSOCK 40/* vSockets
*/
#define AF_MAX 41/* For now.. */
/* Protocol families, same as address families. */
#define PF_UNSPEC AF_UNSPEC
#define PF_UNIX AF_UNIX
#define PF_LOCAL AF_LOCAL
#define PF_INET AF_INET
#define PF_AX25 AF_AX25
#define PF_IPX AF_IPX
#define PF_APPLETALK AF_APPLETALK
#define PF_NETROM AF_NETROM
#define PF_BRIDGE AF_BRIDGE
#define PF_ATMPVC AF_ATMPVC
#define PF_X25 AF_X25
#define PF_INET6 AF_INET6
#define PF_ROSE AF_ROSE
#define PF_DECnet AF_DECnet
#define PF_NETBEUI AF_NETBEUI
#define PF_SECURITY AF_SECURITY
#define PF_KEY AF_KEY
#define PF_NETLINK AF_NETLINK
#define PF_ROUTE AF_ROUTE
#define PF_PACKET AF_PACKET
#define PF_ASH AF_ASH
#define PF_ECONET AF_ECONET
#define PF_ATMSVC AF_ATMSVC
#define PF_RDS AF_RDS
#define PF_SNA AF_SNA
#define PF_IRDA AF_IRDA
#define PF_PPPOX AF_PPPOX
#define PF_WANPIPE AF_WANPIPE
#define PF_LLC AF_LLC
#define PF_IB AF_IB
#define PF_CAN AF_CAN
#define PF_TIPC AF_TIPC
#define PF_BLUETOOTH AF_BLUETOOTH
#define PF_IUCV AF_IUCV
#define PF_RXRPC AF_RXRPC
#define PF_ISDN AF_ISDN
#define PF_PHONET AF_PHONET
#define PF_IEEE802154 AF_IEEE802154
#define PF_CAIF AF_CAIF
#define PF_ALG AF_ALG
#define PF_NFC AF_NFC
#define PF_VSOCK AF_VSOCK
#define PF_MAX AF_MAX
type：
/**
* enum sock_type - Socket types
* @SOCK_STREAM: stream (connection) socket
* @SOCK_DGRAM: datagram (conn.less) socket
* @SOCK_RAW: raw socket
* @SOCK_RDM: reliably-delivered message
* @SOCK_SEQPACKET: sequential packet socket
* @SOCK_DCCP: Datagram Congestion Control Protocol socket
* @SOCK_PACKET: linux specific way of getting packets at the dev level.
* For writing rarp and other similar things on the user level.
*
* When adding some new socket type please
* grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
* overrides this enum for binary compat reasons.
*/
enum sock_type {
SOCK_STREAM
= 1,
SOCK_DGRAM
= 2,
SOCK_RAW
= 3,
SOCK_RDM
= 4,
SOCK_SEQPACKET= 5,
SOCK_DCCP
= 6,
SOCK_PACKET
= 10,
};
protocol：
/* Standard well-defined IP protocols. */
enum {
IPPROTO_IP = 0, /* Dummy protocol for TCP*/
#define IPPROTO_IP IPPROTO_IP
IPPROTO_ICMP = 1, /* Internet Control Message Protocol*/
#define IPPROTO_ICMP IPPROTO_ICMP
IPPROTO_IGMP = 2, /* Internet Group Management Protocol*/
#define IPPROTO_IGMP IPPROTO_IGMP
IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
#define IPPROTO_IPIP IPPROTO_IPIP
IPPROTO_TCP = 6, /* Transmission Control Protocol*/
#define IPPROTO_TCP IPPROTO_TCP
IPPROTO_EGP = 8, /* Exterior Gateway Protocol*/
#define IPPROTO_EGP IPPROTO_EGP
IPPROTO_PUP = 12, /* PUP protocol*/
#define IPPROTO_PUP IPPROTO_PUP
IPPROTO_UDP = 17, /* User Datagram Protocol*/
#define IPPROTO_UDP IPPROTO_UDP
IPPROTO_IDP = 22, /* XNS IDP protocol*/
#define IPPROTO_IDP IPPROTO_IDP
IPPROTO_TP = 29, /* SO Transport Protocol Class 4*/
#define IPPROTO_TP IPPROTO_TP
IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */
#define IPPROTO_DCCP IPPROTO_DCCP
IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling*/
#define IPPROTO_IPV6 IPPROTO_IPV6
IPPROTO_RSVP = 46, /* RSVP Protocol*/
#define IPPROTO_RSVP IPPROTO_RSVP
IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702)*/
#define IPPROTO_GRE IPPROTO_GRE
IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
#define IPPROTO_ESP IPPROTO_ESP
IPPROTO_AH = 51, /* Authentication Header protocol*/
#define IPPROTO_AH IPPROTO_AH
IPPROTO_MTP = 92, /* Multicast Transport Protocol*/
#define IPPROTO_MTP IPPROTO_MTP
IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET*/
#define IPPROTO_BEETPH IPPROTO_BEETPH
IPPROTO_ENCAP = 98, /* Encapsulation Header*/
#define IPPROTO_ENCAP IPPROTO_ENCAP
IPPROTO_PIM = 103, /* Protocol Independent Multicast*/
#define IPPROTO_PIM IPPROTO_PIM
IPPROTO_COMP = 108, /* Compression Header Protocol*/
#define IPPROTO_COMP IPPROTO_COMP
IPPROTO_SCTP = 132, /* Stream Control Transport Protocol*/
#define IPPROTO_SCTP IPPROTO_SCTP
IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828)*/
#define IPPROTO_UDPLITE IPPROTO_UDPLITE
IPPROTO_RAW = 255, /* Raw IP packets*/
#define IPPROTO_RAW IPPROTO_RAW
IPPROTO_MAX
};
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