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# <!-- rdoc-file=ext/socket/constdefs.c -->
# Socket::Constants provides socket-related constants.  All possible socket
# constants are listed in the documentation but they may not all be present on
# your platform.
#
# If the underlying platform doesn't define a constant the corresponding Ruby
# constant is not defined.
#
module Socket::Constants
  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Interface to kernel crypto API
  #
  AF_ALG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # AppleTalk protocol
  #
  AF_APPLETALK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Asynchronous Transfer Mode
  #
  AF_ATM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # AX.25 protocol
  #
  AF_AX25: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Bluetooth low-level socket protocol
  #
  AF_BLUETOOTH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Controller Area Network automotive bus protocol
  #
  AF_CAN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # CCITT (now ITU-T) protocols
  #
  AF_CCITT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # MIT CHAOS protocols
  #
  AF_CHAOS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Computer Network Technology
  #
  AF_CNT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Connection-oriented IP
  #
  AF_COIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Datakit protocol
  #
  AF_DATAKIT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # DECnet protocol
  #
  AF_DEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # DECnet protocol
  #
  AF_DECnet: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # DEC Direct Data Link Interface protocol
  #
  AF_DLI: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # CCITT (ITU-T) E.164 recommendation
  #
  AF_E164: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # European Computer Manufacturers protocols
  #
  AF_ECMA: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # NSC Hyperchannel protocol
  #
  AF_HYLINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # InfiniBand native addressing
  #
  AF_IB: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ARPANET IMP protocol
  #
  AF_IMPLINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPv4 protocol
  #
  AF_INET: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPv6 protocol
  #
  AF_INET6: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPX protocol
  #
  AF_IPX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Integrated Services Digital Network
  #
  AF_ISDN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISO Open Systems Interconnection protocols
  #
  AF_ISO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # KCM (kernel connection multiplexor) interface
  #
  AF_KCM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Key management protocol, originally developed for usage with IPsec
  #
  AF_KEY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Local Area Transport protocol
  #
  AF_LAT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Link layer interface
  #
  AF_LINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Logical  link control (IEEE 802.2 LLC) protocol
  #
  AF_LLC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Host-internal protocols
  #
  AF_LOCAL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum address family for this platform
  #
  AF_MAX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Multiprotocol Label Switching
  #
  AF_MPLS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Native ATM access
  #
  AF_NATM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Network driver raw access
  #
  AF_NDRV: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # NetBIOS
  #
  AF_NETBIOS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Netgraph sockets
  #
  AF_NETGRAPH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Kernel user interface device
  #
  AF_NETLINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # XEROX NS protocols
  #
  AF_NS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISO Open Systems Interconnection protocols
  #
  AF_OSI: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Direct link-layer access
  #
  AF_PACKET: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Point-to-Point Protocol
  #
  AF_PPP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Generic PPP transport layer, for setting up L2 tunnels (L2TP and PPPoE)
  #
  AF_PPPOX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # PARC Universal Packet protocol
  #
  AF_PUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Reliable Datagram Sockets (RDS) protocol
  #
  AF_RDS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Internal routing protocol
  #
  AF_ROUTE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Simple Internet Protocol
  #
  AF_SIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IBM SNA protocol
  #
  AF_SNA: Integer

  AF_SYSTEM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TIPC, "cluster domain sockets" protocol
  #
  AF_TIPC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # UNIX sockets
  #
  AF_UNIX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Unspecified protocol, any supported address family
  #
  AF_UNSPEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # VSOCK (originally "VMWare VSockets") protocol for hypervisor-guest
  # communication
  #
  AF_VSOCK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # XDP (express data path) interface
  #
  AF_XDP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Accept only if any address is assigned
  #
  AI_ADDRCONFIG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Allow all addresses
  #
  AI_ALL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Fill in the canonical name
  #
  AI_CANONNAME: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Default flags for getaddrinfo
  #
  AI_DEFAULT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Valid flag mask for getaddrinfo (not for application use)
  #
  AI_MASK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Prevent host name resolution
  #
  AI_NUMERICHOST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Prevent service name resolution
  #
  AI_NUMERICSERV: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Get address to use with bind()
  #
  AI_PASSIVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Accept IPv4-mapped IPv6 addresses
  #
  AI_V4MAPPED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Accept IPv4 mapped addresses if the kernel supports it
  #
  AI_V4MAPPED_CFG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Address family for hostname not supported
  #
  EAI_ADDRFAMILY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Temporary failure in name resolution
  #
  EAI_AGAIN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Invalid flags
  #
  EAI_BADFLAGS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Invalid value for hints
  #
  EAI_BADHINTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Non-recoverable failure in name resolution
  #
  EAI_FAIL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Address family not supported
  #
  EAI_FAMILY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum error code from getaddrinfo
  #
  EAI_MAX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Memory allocation failure
  #
  EAI_MEMORY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # No address associated with hostname
  #
  EAI_NODATA: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Hostname nor servname, or not known
  #
  EAI_NONAME: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Argument buffer overflow
  #
  EAI_OVERFLOW: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Resolved protocol is unknown
  #
  EAI_PROTOCOL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Servname not supported for socket type
  #
  EAI_SERVICE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Socket type not supported
  #
  EAI_SOCKTYPE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # System error returned in errno
  #
  EAI_SYSTEM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # 802.1Q VLAN device
  #
  IFF_802_1Q_VLAN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # receive all multicast packets
  #
  IFF_ALLMULTI: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # use alternate physical connection
  #
  IFF_ALTPHYS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # auto media select active
  #
  IFF_AUTOMEDIA: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # bonding master or slave
  #
  IFF_BONDING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # device used as bridge port
  #
  IFF_BRIDGE_PORT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # broadcast address valid
  #
  IFF_BROADCAST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # flags not changeable
  #
  IFF_CANTCHANGE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # unconfigurable using ioctl(2)
  #
  IFF_CANTCONFIG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # turn on debugging
  #
  IFF_DEBUG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # disable netpoll at run-time
  #
  IFF_DISABLE_NETPOLL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # disallow bridging this ether dev
  #
  IFF_DONT_BRIDGE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # driver signals dormant
  #
  IFF_DORMANT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # tx hardware queue is full
  #
  IFF_DRV_OACTIVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # resources allocated
  #
  IFF_DRV_RUNNING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # interface is winding down
  #
  IFF_DYING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # dialup device with changing addresses
  #
  IFF_DYNAMIC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ethernet bridging device
  #
  IFF_EBRIDGE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # echo sent packets
  #
  IFF_ECHO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISATAP interface (RFC4214)
  #
  IFF_ISATAP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # per link layer defined bit 0
  #
  IFF_LINK0: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # per link layer defined bit 1
  #
  IFF_LINK1: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # per link layer defined bit 2
  #
  IFF_LINK2: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # hardware address change when it's running
  #
  IFF_LIVE_ADDR_CHANGE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # loopback net
  #
  IFF_LOOPBACK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # driver signals L1 up
  #
  IFF_LOWER_UP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # device used as macvlan port
  #
  IFF_MACVLAN_PORT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # master of a load balancer
  #
  IFF_MASTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # bonding master, 802.3ad.
  #
  IFF_MASTER_8023AD: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # bonding master, balance-alb.
  #
  IFF_MASTER_ALB: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # bonding master, ARP mon in use
  #
  IFF_MASTER_ARPMON: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # user-requested monitor mode
  #
  IFF_MONITOR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # supports multicast
  #
  IFF_MULTICAST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # no address resolution protocol
  #
  IFF_NOARP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # avoid use of trailers
  #
  IFF_NOTRAILERS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # transmission in progress
  #
  IFF_OACTIVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # device used as Open vSwitch datapath port
  #
  IFF_OVS_DATAPATH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # point-to-point link
  #
  IFF_POINTOPOINT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # can set media type
  #
  IFF_PORTSEL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # user-requested promisc mode
  #
  IFF_PPROMISC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # receive all packets
  #
  IFF_PROMISC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # interface is being renamed
  #
  IFF_RENAMING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # routing entry installed
  #
  IFF_ROUTE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # resources allocated
  #
  IFF_RUNNING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # can't hear own transmissions
  #
  IFF_SIMPLEX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # slave of a load balancer
  #
  IFF_SLAVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # bonding slave not the curr. active
  #
  IFF_SLAVE_INACTIVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # need ARPs for validation
  #
  IFF_SLAVE_NEEDARP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # interface manages own routes
  #
  IFF_SMART: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # static ARP
  #
  IFF_STATICARP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # sending custom FCS
  #
  IFF_SUPP_NOFCS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # used as team port
  #
  IFF_TEAM_PORT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # sharing skbs on transmit
  #
  IFF_TX_SKB_SHARING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # unicast filtering
  #
  IFF_UNICAST_FLT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # interface is up
  #
  IFF_UP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # volatile flags
  #
  IFF_VOLATILE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # WAN HDLC device
  #
  IFF_WAN_HDLC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # dev_hard_start_xmit() is allowed to release skb->dst
  #
  IFF_XMIT_DST_RELEASE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum interface name size
  #
  IFNAMSIZ: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum interface name size
  #
  IF_NAMESIZE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Multicast group for all systems on this subset
  #
  INADDR_ALLHOSTS_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A socket bound to INADDR_ANY receives packets from all interfaces and sends
  # from the default IP address
  #
  INADDR_ANY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The network broadcast address
  #
  INADDR_BROADCAST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The loopback address
  #
  INADDR_LOOPBACK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The last local network multicast group
  #
  INADDR_MAX_LOCAL_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A bitmask for matching no valid IP address
  #
  INADDR_NONE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The reserved multicast group
  #
  INADDR_UNSPEC_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum length of an IPv6 address string
  #
  INET6_ADDRSTRLEN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum length of an IPv4 address string
  #
  INET_ADDRSTRLEN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Default minimum address for bind or connect
  #
  IPPORT_RESERVED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Default maximum address for bind or connect
  #
  IPPORT_USERRESERVED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 auth header
  #
  IPPROTO_AH: Integer

  IPPROTO_BIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 destination option
  #
  IPPROTO_DSTOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Exterior Gateway Protocol
  #
  IPPROTO_EGP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISO cnlp
  #
  IPPROTO_EON: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 Encapsulated Security Payload
  #
  IPPROTO_ESP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 fragmentation header
  #
  IPPROTO_FRAGMENT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Gateway to Gateway Protocol
  #
  IPPROTO_GGP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # "hello" routing protocol
  #
  IPPROTO_HELLO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 hop-by-hop options
  #
  IPPROTO_HOPOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Control message protocol
  #
  IPPROTO_ICMP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ICMP6
  #
  IPPROTO_ICMPV6: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # XNS IDP
  #
  IPPROTO_IDP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Group Management Protocol
  #
  IPPROTO_IGMP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Dummy protocol for IP
  #
  IPPROTO_IP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 header
  #
  IPPROTO_IPV6: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum IPPROTO constant
  #
  IPPROTO_MAX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Sun net disk protocol
  #
  IPPROTO_ND: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 no next header
  #
  IPPROTO_NONE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # PARC Universal Packet protocol
  #
  IPPROTO_PUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Raw IP packet
  #
  IPPROTO_RAW: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 routing header
  #
  IPPROTO_ROUTING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TCP
  #
  IPPROTO_TCP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISO transport protocol class 4
  #
  IPPROTO_TP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # UDP
  #
  IPPROTO_UDP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Xpress Transport Protocol
  #
  IPPROTO_XTP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Checksum offset for raw sockets
  #
  IPV6_CHECKSUM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't fragment packets
  #
  IPV6_DONTFRAG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Destination option
  #
  IPV6_DSTOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Hop limit
  #
  IPV6_HOPLIMIT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Hop-by-hop option
  #
  IPV6_HOPOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Join a group membership
  #
  IPV6_JOIN_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Leave a group membership
  #
  IPV6_LEAVE_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 multicast hops
  #
  IPV6_MULTICAST_HOPS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 multicast interface
  #
  IPV6_MULTICAST_IF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 multicast loopback
  #
  IPV6_MULTICAST_LOOP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Next hop address
  #
  IPV6_NEXTHOP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Retrieve current path MTU
  #
  IPV6_PATHMTU: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive packet information with datagram
  #
  IPV6_PKTINFO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive all IP6 options for response
  #
  IPV6_RECVDSTOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive hop limit with datagram
  #
  IPV6_RECVHOPLIMIT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive hop-by-hop options
  #
  IPV6_RECVHOPOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive current path MTU with datagram
  #
  IPV6_RECVPATHMTU: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive destination IP address and incoming interface
  #
  IPV6_RECVPKTINFO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive routing header
  #
  IPV6_RECVRTHDR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive traffic class
  #
  IPV6_RECVTCLASS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Allows removal of sticky routing headers
  #
  IPV6_RTHDR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Allows removal of sticky destination options header
  #
  IPV6_RTHDRDSTOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Routing header type 0
  #
  IPV6_RTHDR_TYPE_0: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Specify the traffic class
  #
  IPV6_TCLASS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP6 unicast hops
  #
  IPV6_UNICAST_HOPS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Use the minimum MTU size
  #
  IPV6_USE_MIN_MTU: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Only bind IPv6 with a wildcard bind
  #
  IPV6_V6ONLY: Integer

  IPX_TYPE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Add a multicast group membership
  #
  IP_ADD_MEMBERSHIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Add a multicast group membership
  #
  IP_ADD_SOURCE_MEMBERSHIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Block IPv4 multicast packets with a give source address
  #
  IP_BLOCK_SOURCE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Default multicast loopback
  #
  IP_DEFAULT_MULTICAST_LOOP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Default multicast TTL
  #
  IP_DEFAULT_MULTICAST_TTL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't fragment packets
  #
  IP_DONTFRAG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Drop a multicast group membership
  #
  IP_DROP_MEMBERSHIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Drop a multicast group membership
  #
  IP_DROP_SOURCE_MEMBERSHIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Allow binding to nonexistent IP addresses
  #
  IP_FREEBIND: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Header is included with data
  #
  IP_HDRINCL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPsec security policy
  #
  IP_IPSEC_POLICY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum number multicast groups a socket can join
  #
  IP_MAX_MEMBERSHIPS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Minimum TTL allowed for received packets
  #
  IP_MINTTL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Multicast source filtering
  #
  IP_MSFILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The Maximum Transmission Unit of the socket
  #
  IP_MTU: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Path MTU discovery
  #
  IP_MTU_DISCOVER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP multicast interface
  #
  IP_MULTICAST_IF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP multicast loopback
  #
  IP_MULTICAST_LOOP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP multicast TTL
  #
  IP_MULTICAST_TTL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Force outgoing broadcast datagrams to have the undirected broadcast address
  #
  IP_ONESBCAST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP options to be included in packets
  #
  IP_OPTIONS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Retrieve security context with datagram
  #
  IP_PASSSEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive packet information with datagrams
  #
  IP_PKTINFO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive packet options with datagrams
  #
  IP_PKTOPTIONS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Always send DF frames
  #
  IP_PMTUDISC_DO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Never send DF frames
  #
  IP_PMTUDISC_DONT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Use per-route hints
  #
  IP_PMTUDISC_WANT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set the port range for sockets with unspecified port numbers
  #
  IP_PORTRANGE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive IP destination address with datagram
  #
  IP_RECVDSTADDR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Enable extended reliable error message passing
  #
  IP_RECVERR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive interface information with datagrams
  #
  IP_RECVIF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive all IP options with datagram
  #
  IP_RECVOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive all IP options for response
  #
  IP_RECVRETOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive link-layer address with datagrams
  #
  IP_RECVSLLA: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive TOS with incoming packets
  #
  IP_RECVTOS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive IP TTL with datagrams
  #
  IP_RECVTTL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP options to be included in datagrams
  #
  IP_RETOPTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Notify transit routers to more closely examine the contents of an IP packet
  #
  IP_ROUTER_ALERT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Source address for outgoing UDP datagrams
  #
  IP_SENDSRCADDR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP type-of-service
  #
  IP_TOS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Transparent proxy
  #
  IP_TRANSPARENT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP time-to-live
  #
  IP_TTL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Unblock IPv4 multicast packets with a give source address
  #
  IP_UNBLOCK_SOURCE: Integer

  IP_XFRM_POLICY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Connect blocks until accepted
  #
  LOCAL_CONNWAIT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Pass credentials to receiver
  #
  LOCAL_CREDS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Retrieve peer credentials
  #
  LOCAL_PEERCRED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Block multicast packets from this source
  #
  MCAST_BLOCK_SOURCE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Exclusive multicast source filter
  #
  MCAST_EXCLUDE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Inclusive multicast source filter
  #
  MCAST_INCLUDE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Join a multicast group
  #
  MCAST_JOIN_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Join a multicast source group
  #
  MCAST_JOIN_SOURCE_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Leave a multicast group
  #
  MCAST_LEAVE_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Leave a multicast source group
  #
  MCAST_LEAVE_SOURCE_GROUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Multicast source filtering
  #
  MCAST_MSFILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Unblock multicast packets from this source
  #
  MCAST_UNBLOCK_SOURCE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # End of record
  #
  MSG_COMPAT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Confirm path validity
  #
  MSG_CONFIRM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Control data lost before delivery
  #
  MSG_CTRUNC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Send without using the routing tables
  #
  MSG_DONTROUTE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # This message should be non-blocking
  #
  MSG_DONTWAIT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Data completes connection
  #
  MSG_EOF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Data completes record
  #
  MSG_EOR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Fetch message from error queue
  #
  MSG_ERRQUEUE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Reduce step of the handshake process
  #
  MSG_FASTOPEN: Integer

  MSG_FIN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Start of a hold sequence.  Dumps to so_temp
  #
  MSG_FLUSH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Data ready to be read
  #
  MSG_HAVEMORE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Hold fragment in so_temp
  #
  MSG_HOLD: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Sender will send more
  #
  MSG_MORE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Do not generate SIGPIPE
  #
  MSG_NOSIGNAL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Process out-of-band data
  #
  MSG_OOB: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Peek at incoming message
  #
  MSG_PEEK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Wait for full request
  #
  MSG_PROXY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Data remains in the current packet
  #
  MSG_RCVMORE: Integer

  MSG_RST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Send the packet in so_temp
  #
  MSG_SEND: Integer

  MSG_SYN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Data discarded before delivery
  #
  MSG_TRUNC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Wait for full request or error
  #
  MSG_WAITALL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The service specified is a datagram service (looks up UDP ports)
  #
  NI_DGRAM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum length of a hostname
  #
  NI_MAXHOST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum length of a service name
  #
  NI_MAXSERV: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A name is required
  #
  NI_NAMEREQD: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # An FQDN is not required for local hosts, return only the local part
  #
  NI_NOFQDN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Return a numeric address
  #
  NI_NUMERICHOST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Return the service name as a digit string
  #
  NI_NUMERICSERV: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Interface to kernel crypto API
  #
  PF_ALG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # AppleTalk protocol
  #
  PF_APPLETALK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Asynchronous Transfer Mode
  #
  PF_ATM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # AX.25 protocol
  #
  PF_AX25: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Bluetooth low-level socket protocol
  #
  PF_BLUETOOTH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Controller Area Network automotive bus protocol
  #
  PF_CAN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # CCITT (now ITU-T) protocols
  #
  PF_CCITT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # MIT CHAOS protocols
  #
  PF_CHAOS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Computer Network Technology
  #
  PF_CNT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Connection-oriented IP
  #
  PF_COIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Datakit protocol
  #
  PF_DATAKIT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # DECnet protocol
  #
  PF_DEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # DECnet protocol
  #
  PF_DECnet: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # DEC Direct Data Link Interface protocol
  #
  PF_DLI: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # European Computer Manufacturers protocols
  #
  PF_ECMA: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # NSC Hyperchannel protocol
  #
  PF_HYLINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # InfiniBand native addressing
  #
  PF_IB: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ARPANET IMP protocol
  #
  PF_IMPLINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPv4 protocol
  #
  PF_INET: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPv6 protocol
  #
  PF_INET6: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPX protocol
  #
  PF_IPX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Integrated Services Digital Network
  #
  PF_ISDN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISO Open Systems Interconnection protocols
  #
  PF_ISO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # KCM (kernel connection multiplexor) interface
  #
  PF_KCM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Key management protocol, originally developed for usage with IPsec
  #
  PF_KEY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Local Area Transport protocol
  #
  PF_LAT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Link layer interface
  #
  PF_LINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Logical  link control (IEEE 802.2 LLC) protocol
  #
  PF_LLC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Host-internal protocols
  #
  PF_LOCAL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum address family for this platform
  #
  PF_MAX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Multiprotocol Label Switching
  #
  PF_MPLS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Native ATM access
  #
  PF_NATM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Network driver raw access
  #
  PF_NDRV: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # NetBIOS
  #
  PF_NETBIOS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Netgraph sockets
  #
  PF_NETGRAPH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Kernel user interface device
  #
  PF_NETLINK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # XEROX NS protocols
  #
  PF_NS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # ISO Open Systems Interconnection protocols
  #
  PF_OSI: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Direct link-layer access
  #
  PF_PACKET: Integer

  PF_PIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Point-to-Point Protocol
  #
  PF_PPP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Generic PPP transport layer, for setting up L2 tunnels (L2TP and PPPoE)
  #
  PF_PPPOX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # PARC Universal Packet protocol
  #
  PF_PUP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Reliable Datagram Sockets (RDS) protocol
  #
  PF_RDS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Internal routing protocol
  #
  PF_ROUTE: Integer

  PF_RTIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Simple Internet Protocol
  #
  PF_SIP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IBM SNA protocol
  #
  PF_SNA: Integer

  PF_SYSTEM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TIPC, "cluster domain sockets" protocol
  #
  PF_TIPC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # UNIX sockets
  #
  PF_UNIX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Unspecified protocol, any supported address family
  #
  PF_UNSPEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # VSOCK (originally "VMWare VSockets") protocol for hypervisor-guest
  # communication
  #
  PF_VSOCK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # XDP (express data path) interface
  #
  PF_XDP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # eXpress Transfer Protocol
  #
  PF_XTP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Timestamp (bintime)
  #
  SCM_BINTIME: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The sender's credentials
  #
  SCM_CREDENTIALS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Process credentials
  #
  SCM_CREDS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Access rights
  #
  SCM_RIGHTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Timestamp (timeval)
  #
  SCM_TIMESTAMP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Timestamp (timespec list) (Linux 2.6.30)
  #
  SCM_TIMESTAMPING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Timespec (timespec)
  #
  SCM_TIMESTAMPNS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # User credentials
  #
  SCM_UCRED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Wifi status (Linux 3.3)
  #
  SCM_WIFI_STATUS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Shut down the reading side of the socket
  #
  SHUT_RD: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Shut down the both sides of the socket
  #
  SHUT_RDWR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Shut down the writing side of the socket
  #
  SHUT_WR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set the close-on-exec (FD_CLOEXEC) flag on the new file  descriptor.
  #
  SOCK_CLOEXEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A datagram socket provides connectionless, unreliable messaging
  #
  SOCK_DGRAM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set the O_NONBLOCK file status flag on the open file description (see open(2))
  # referred to by the new file descriptor.
  #
  SOCK_NONBLOCK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Device-level packet access
  #
  SOCK_PACKET: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A raw socket provides low-level access for direct access or implementing
  # network protocols
  #
  SOCK_RAW: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A reliable datagram socket provides reliable delivery of messages
  #
  SOCK_RDM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A sequential packet socket provides sequenced, reliable two-way connection for
  # datagrams
  #
  SOCK_SEQPACKET: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # A stream socket provides a sequenced, reliable two-way connection for a byte
  # stream
  #
  SOCK_STREAM: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # AppleTalk socket options
  #
  SOL_ATALK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # AX.25 socket options
  #
  SOL_AX25: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IP socket options
  #
  SOL_IP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # IPX socket options
  #
  SOL_IPX: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Socket-level options
  #
  SOL_SOCKET: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TCP socket options
  #
  SOL_TCP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # UDP socket options
  #
  SOL_UDP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum connection requests that may be queued for a socket
  #
  SOMAXCONN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Background socket priority
  #
  SOPRI_BACKGROUND: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Interactive socket priority
  #
  SOPRI_INTERACTIVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Normal socket priority
  #
  SOPRI_NORMAL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Socket has had listen() called on it
  #
  SO_ACCEPTCONN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # There is an accept filter
  #
  SO_ACCEPTFILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Bypass zone boundaries
  #
  SO_ALLZONES: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Attach an accept filter
  #
  SO_ATTACH_FILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Only send packets from the given interface
  #
  SO_BINDTODEVICE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive timestamp with datagrams (bintime)
  #
  SO_BINTIME: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Query supported BPF extensions (Linux 3.14)
  #
  SO_BPF_EXTENSIONS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Permit sending of broadcast messages
  #
  SO_BROADCAST: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set the threshold in microseconds for low latency polling (Linux 3.11)
  #
  SO_BUSY_POLL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Debug info recording
  #
  SO_DEBUG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Detach an accept filter
  #
  SO_DETACH_FILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Domain given for socket() (Linux 2.6.32)
  #
  SO_DOMAIN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Use interface addresses
  #
  SO_DONTROUTE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Retain unread data
  #
  SO_DONTTRUNC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Get and clear the error status
  #
  SO_ERROR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Obtain filter set by SO_ATTACH_FILTER (Linux 3.8)
  #
  SO_GET_FILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Keep connections alive
  #
  SO_KEEPALIVE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Linger on close if data is present
  #
  SO_LINGER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Lock the filter attached to a socket (Linux 3.9)
  #
  SO_LOCK_FILTER: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Mandatory Access Control exemption for unlabeled peers
  #
  SO_MAC_EXEMPT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set the mark for mark-based routing (Linux 2.6.25)
  #
  SO_MARK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Cap the rate computed by transport layer. [bytes per second] (Linux 3.13)
  #
  SO_MAX_PACING_RATE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Install socket-level Network Kernel Extension
  #
  SO_NKE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set netns of a socket (Linux 3.4)
  #
  SO_NOFCS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't SIGPIPE on EPIPE
  #
  SO_NOSIGPIPE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Disable checksums
  #
  SO_NO_CHECK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Get first packet byte count
  #
  SO_NREAD: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Leave received out-of-band data in-line
  #
  SO_OOBINLINE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive SCM_CREDENTIALS messages
  #
  SO_PASSCRED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Toggle security context passing (Linux 2.6.18)
  #
  SO_PASSSEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set the peek offset (Linux 3.4)
  #
  SO_PEEK_OFF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The credentials of the foreign process connected to this socket
  #
  SO_PEERCRED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Name of the connecting user
  #
  SO_PEERNAME: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Obtain the security credentials (Linux 2.6.2)
  #
  SO_PEERSEC: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # The protocol-defined priority for all packets on this socket
  #
  SO_PRIORITY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Protocol given for socket() (Linux 2.6.32)
  #
  SO_PROTOCOL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive buffer size
  #
  SO_RCVBUF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive buffer size without rmem_max limit (Linux 2.6.14)
  #
  SO_RCVBUFFORCE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive low-water mark
  #
  SO_RCVLOWAT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive timeout
  #
  SO_RCVTIMEO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive user credentials with datagram
  #
  SO_RECVUCRED: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Allow local address reuse
  #
  SO_REUSEADDR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Allow local address and port reuse
  #
  SO_REUSEPORT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Toggle cmsg for number of packets dropped (Linux 2.6.33)
  #
  SO_RXQ_OVFL: Integer

  SO_SECURITY_AUTHENTICATION: Integer

  SO_SECURITY_ENCRYPTION_NETWORK: Integer

  SO_SECURITY_ENCRYPTION_TRANSPORT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Make select() detect socket error queue with errorfds (Linux 3.10)
  #
  SO_SELECT_ERR_QUEUE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Send buffer size
  #
  SO_SNDBUF: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Send buffer size without wmem_max limit (Linux 2.6.14)
  #
  SO_SNDBUFFORCE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Send low-water mark
  #
  SO_SNDLOWAT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Send timeout
  #
  SO_SNDTIMEO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive timestamp with datagrams (timeval)
  #
  SO_TIMESTAMP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Time stamping of incoming and outgoing packets (Linux 2.6.30)
  #
  SO_TIMESTAMPING: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Receive nanosecond timestamp with datagrams (timespec)
  #
  SO_TIMESTAMPNS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Get the socket type
  #
  SO_TYPE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Bypass hardware when possible
  #
  SO_USELOOPBACK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Give a hint when more data is ready
  #
  SO_WANTMORE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # OOB data is wanted in MSG_FLAG on receive
  #
  SO_WANTOOBFLAG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Toggle cmsg for wifi status (Linux 3.3)
  #
  SO_WIFI_STATUS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TCP congestion control algorithm (Linux 2.6.13, glibc 2.6)
  #
  TCP_CONGESTION: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TCP Cookie Transactions (Linux 2.6.33, glibc 2.18)
  #
  TCP_COOKIE_TRANSACTIONS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't send partial frames (Linux 2.2, glibc 2.2)
  #
  TCP_CORK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't notify a listening socket until data is ready (Linux 2.4, glibc 2.2)
  #
  TCP_DEFER_ACCEPT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Reduce step of the handshake process (Linux 3.7, glibc 2.18)
  #
  TCP_FASTOPEN: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Retrieve information about this socket (Linux 2.4, glibc 2.2)
  #
  TCP_INFO: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Maximum number of keepalive probes allowed before dropping a connection (Linux
  # 2.4, glibc 2.2)
  #
  TCP_KEEPCNT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Idle time before keepalive probes are sent (Linux 2.4, glibc 2.2)
  #
  TCP_KEEPIDLE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Time between keepalive probes (Linux 2.4, glibc 2.2)
  #
  TCP_KEEPINTVL: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Lifetime of orphaned FIN_WAIT2 sockets (Linux 2.4, glibc 2.2)
  #
  TCP_LINGER2: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Set maximum segment size
  #
  TCP_MAXSEG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Use MD5 digests (RFC2385, Linux 2.6.20, glibc 2.7)
  #
  TCP_MD5SIG: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't delay sending to coalesce packets
  #
  TCP_NODELAY: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't use TCP options
  #
  TCP_NOOPT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't push the last block of write
  #
  TCP_NOPUSH: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Sequence of a queue for repair mode (Linux 3.5, glibc 2.18)
  #
  TCP_QUEUE_SEQ: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Enable quickack mode (Linux 2.4.4, glibc 2.3)
  #
  TCP_QUICKACK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Repair mode (Linux 3.5, glibc 2.18)
  #
  TCP_REPAIR: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Options for repair mode (Linux 3.5, glibc 2.18)
  #
  TCP_REPAIR_OPTIONS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Queue for repair mode (Linux 3.5, glibc 2.18)
  #
  TCP_REPAIR_QUEUE: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Number of SYN retransmits before a connection is dropped (Linux 2.4, glibc
  # 2.2)
  #
  TCP_SYNCNT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Duplicated acknowledgments handling for thin-streams (Linux 2.6.34, glibc
  # 2.18)
  #
  TCP_THIN_DUPACK: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Linear timeouts for thin-streams (Linux 2.6.34, glibc 2.18)
  #
  TCP_THIN_LINEAR_TIMEOUTS: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # TCP timestamp (Linux 3.9, glibc 2.18)
  #
  TCP_TIMESTAMP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Max timeout before a TCP connection is aborted (Linux 2.6.37, glibc 2.18)
  #
  TCP_USER_TIMEOUT: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Clamp the size of the advertised window (Linux 2.4, glibc 2.2)
  #
  TCP_WINDOW_CLAMP: Integer

  # <!-- rdoc-file=ext/socket/constdefs.c -->
  # Don't send partial frames (Linux 2.5.44, glibc 2.11)
  #
  UDP_CORK: Integer
end

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