enum_sock_type(9) centos man page | unix.com

ENUM 
SOCK_TYPE(9)						 Linux Networking						 ENUM SOCK_TYPE(9)

NAME
       enum_sock_type - Socket types

SYNOPSIS
       enum sock_type {
	 SOCK_STREAM,
	 SOCK_DGRAM,
	 SOCK_RAW,
	 SOCK_RDM,
	 SOCK_SEQPACKET,
	 SOCK_DCCP,
	 SOCK_PACKET
       };

CONSTANTS
       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.

DESCRIPTION
       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.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							 ENUM SOCK_TYPE(9)