# frozen_string_literal: false

require 'optparse'

require 'erb'

opt = OptionParser.new

opt.def_option('-h', 'help') {

puts opt

exit 0

}

opt_o = nil

opt.def_option('-o FILE', 'specify output file') {|filename|

opt_o = filename

}

opt_H = nil

opt.def_option('-H FILE', 'specify output header file') {|filename|

opt_H = filename

}

C_ESC = {

"\\" => "\\\\",

'"' => '\"',

"\n" => '\n',

}

0x00.upto(0x1f) {|ch| C_ESC[[ch].pack("C")] ||= "\\%03o" % ch }

0x7f.upto(0xff) {|ch| C_ESC[[ch].pack("C")] = "\\%03o" % ch }

C_ESC_PAT = Regexp.union(*C_ESC.keys)

def c_str(str)

'"' + str.gsub(C_ESC_PAT) {|s| C_ESC[s]} + '"'

end

opt.parse!

h = {}

COMMENTS = Hash.new { |h, name| h[name] = name }

DATA.each_line {|s|

name, default_value, comment = s.chomp.split(/\s+/, 3)

next unless name && name[0] != ?#

default_value = nil if default_value == 'nil'

if h.has_key? name

warn "#{$.}: warning: duplicate name: #{name}"

next

end

h[name] = default_value

if comment

# Stop unintentional references

COMMENTS[name] = comment.gsub(/\b(Data|Kernel|Process|Set|Socket|Time)\b/, '\\\\\\&')

end

}

DEFS = h.to_a

def each_const

end

def each_name(pat)

end

erb_new = lambda do |src, safe, trim|

if ERB.instance_method(:initialize).parameters.assoc(:key) # Ruby 2.6+

ERB.new(src, trim_mode: trim)

else

ERB.new(src, safe, trim)

end

end

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_const_decls")

% each_const {|guard, name, default_value|

#if !defined(<%=name%>)

# if defined(HAVE_CONST_<%=name.upcase%>)

# define <%=name%> <%=name%>

%if default_value

# else

# define <%=name%> <%=default_value%>

%end

# endif

#endif

% }

EOS

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_const_defs_in_guard(name, default_value)")

#if defined(<%=name%>)

/* <%= COMMENTS[name] %> */

rb_define_const(rb_cSocket, <%=c_str name%>, INTEGER2NUM(<%=name%>));

/* <%= COMMENTS[name] %> */

rb_define_const(rb_mSockConst, <%=c_str name%>, INTEGER2NUM(<%=name%>));

#endif

EOS

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_const_defs")

% each_const {|guard, name, default_value|

% if guard

#if <%=guard%>

<%= gen_const_defs_in_guard(name, default_value).chomp %>

#endif

% else

<%= gen_const_defs_in_guard(name, default_value).chomp %>

% end

% }

EOS

def reverse_each_name(pat)

end

def each_names_with_len(pat, prefix_optional=nil)

end

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_name_to_int_decl(funcname, pat, prefix_optional, guard=nil)")

%if guard

#ifdef <%=guard%>

int <%=funcname%>(const char *str, long len, int *valp);

#endif

%else

int <%=funcname%>(const char *str, long len, int *valp);

%end

EOS

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_name_to_int_func_in_guard(funcname, pat, prefix_optional, guard=nil)")

int

<%=funcname%>(const char *str, long len, int *valp)

{

switch (len) {

% each_names_with_len(pat, prefix_optional) {|pairs, len|

case <%=len%>:

% pairs.each {|name, const|

#ifdef <%=const%>

if (memcmp(str, <%=c_str name%>, <%=len%>) == 0) { *valp = <%=const%>; return 0; }

#endif

% }

return -1;

% }

default:

if (!str || !valp) {/* wrong argument */}

return -1;

}

}

EOS

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_name_to_int_func(funcname, pat, prefix_optional, guard=nil)")

%if guard

#ifdef <%=guard%>

<%=gen_name_to_int_func_in_guard(funcname, pat, prefix_optional, guard)%>

#endif

%else

<%=gen_name_to_int_func_in_guard(funcname, pat, prefix_optional, guard)%>

%end

EOS

NAME_TO_INT_DEFS = []

def def_name_to_int(funcname, pat, prefix_optional, guard=nil)

end

def reverse_each_name_with_prefix_optional(pat, prefix_pat)

end

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_int_to_name_hash(hash_var, pat, prefix_pat)")

<%=hash_var%> = st_init_numtable();

% reverse_each_name_with_prefix_optional(pat, prefix_pat) {|n,s|

#ifdef <%=n%>

st_insert(<%=hash_var%>, (st_data_t)<%=n%>, (st_data_t)rb_intern2(<%=c_str s%>, <%=s.length%>));

#endif

% }

EOS

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_int_to_name_func(func_name, hash_var)")

ID

<%=func_name%>(int val)

{

st_data_t name;

if (st_lookup(<%=hash_var%>, (st_data_t)val, &name))

return (ID)name;

return 0;

}

EOS

erb_new.call(<<'EOS', nil, '%').def_method(Object, "gen_int_to_name_decl(func_name, hash_var)")

ID <%=func_name%>(int val);

EOS

INTERN_DEFS = []

def def_intern(func_name, pat, prefix_optional=nil)

end

def_name_to_int("rsock_family_to_int", /\A(AF_|PF_)/, "AF_")

def_name_to_int("rsock_socktype_to_int", /\ASOCK_/, "SOCK_")

def_name_to_int("rsock_ipproto_to_int", /\AIPPROTO_/, "IPPROTO_")

def_name_to_int("rsock_unknown_level_to_int", /\ASOL_SOCKET\z/, "SOL_")

def_name_to_int("rsock_ip_level_to_int", /\A(SOL_SOCKET\z|IPPROTO_)/, /\A(SOL_|IPPROTO_)/)

def_name_to_int("rsock_so_optname_to_int", /\ASO_/, "SO_")

def_name_to_int("rsock_ip_optname_to_int", /\AIP_/, "IP_")

def_name_to_int("rsock_ipv6_optname_to_int", /\AIPV6_/, "IPV6_", "IPPROTO_IPV6")

def_name_to_int("rsock_tcp_optname_to_int", /\ATCP_/, "TCP_")

def_name_to_int("rsock_udp_optname_to_int", /\AUDP_/, "UDP_")

def_name_to_int("rsock_shutdown_how_to_int", /\ASHUT_/, "SHUT_")

def_name_to_int("rsock_scm_optname_to_int", /\ASCM_/, "SCM_")

def_intern('rsock_intern_family', /\AAF_/)

def_intern('rsock_intern_family_noprefix', /\AAF_/, "AF_")

def_intern('rsock_intern_protocol_family', /\APF_/)

def_intern('rsock_intern_socktype', /\ASOCK_/)

def_intern('rsock_intern_ipproto', /\AIPPROTO_/)

def_intern('rsock_intern_iplevel', /\A(SOL_SOCKET\z|IPPROTO_)/, /\A(SOL_|IPPROTO_)/)

def_intern('rsock_intern_so_optname', /\ASO_/, "SO_")

def_intern('rsock_intern_ip_optname', /\AIP_/, "IP_")

def_intern('rsock_intern_ipv6_optname', /\AIPV6_/, "IPV6_")

def_intern('rsock_intern_tcp_optname', /\ATCP_/, "TCP_")

def_intern('rsock_intern_udp_optname', /\AUDP_/, "UDP_")

def_intern('rsock_intern_scm_optname', /\ASCM_/, "SCM_")

def_intern('rsock_intern_local_optname', /\ALOCAL_/, "LOCAL_")

result = erb_new.call(<<'EOS', nil, '%').result(binding)

/* autogenerated file */

<%= INTERN_DEFS.map {|vardef, gen_hash, decl, func| vardef }.join("\n") %>

#ifdef HAVE_LONG_LONG

#define INTEGER2NUM(n) \

(FIXNUM_MAX < (n) ? ULL2NUM(n) : \

FIXNUM_MIN > (LONG_LONG)(n) ? LL2NUM(n) : \

LONG2FIX(n))

#else

#define INTEGER2NUM(n) \

(FIXNUM_MAX < (n) ? ULONG2NUM(n) : \

FIXNUM_MIN > (long)(n) ? LONG2NUM(n) : \

LONG2FIX(n))

#endif

static void

init_constants(void)

{

/*

* Document-module: Socket::Constants

*

* 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.

*

*/

rb_mSockConst = rb_define_module_under(rb_cSocket, "Constants");

<%= gen_const_defs %>

<%= INTERN_DEFS.map {|vardef, gen_hash, decl, func| gen_hash }.join("\n") %>

}

<%= NAME_TO_INT_DEFS.map {|decl, func| func }.join("\n") %>

<%= INTERN_DEFS.map {|vardef, gen_hash, decl, func| func }.join("\n") %>

EOS

header_result = erb_new.call(<<'EOS', nil, '%').result(binding)

/* autogenerated file */

<%= gen_const_decls %>

<%= NAME_TO_INT_DEFS.map {|decl, func| decl }.join("\n") %>

<%= INTERN_DEFS.map {|vardef, gen_hash, decl, func| decl }.join("\n") %>

EOS

if opt_H

File.open(opt_H, 'w') {|f|

f << header_result

}

else

result = header_result + result

end

if opt_o

File.open(opt_o, 'w') {|f|

f << result

}

else

$stdout << result

end

__END__

SOCK_STREAM nil A stream socket provides a sequenced, reliable two-way connection for a byte stream

SOCK_DGRAM nil A datagram socket provides connectionless, unreliable messaging

SOCK_RAW nil A raw socket provides low-level access for direct access or implementing network protocols

SOCK_RDM nil A reliable datagram socket provides reliable delivery of messages

SOCK_SEQPACKET nil A sequential packet socket provides sequenced, reliable two-way connection for datagrams

SOCK_PACKET nil Device-level packet access

SOCK_NONBLOCK nil Set the O_NONBLOCK file status flag on the open file description (see open(2)) referred to by the new file descriptor.

SOCK_CLOEXEC nil Set the close-on-exec (FD_CLOEXEC) flag on the new file descriptor.

AF_UNSPEC nil Unspecified protocol, any supported address family

PF_UNSPEC nil Unspecified protocol, any supported address family

AF_INET nil IPv4 protocol

PF_INET nil IPv4 protocol

AF_INET6 nil IPv6 protocol

PF_INET6 nil IPv6 protocol

AF_UNIX nil UNIX sockets

PF_UNIX nil UNIX sockets

AF_AX25 nil AX.25 protocol

PF_AX25 nil AX.25 protocol

AF_IPX nil IPX protocol

PF_IPX nil IPX protocol

AF_APPLETALK nil AppleTalk protocol

PF_APPLETALK nil AppleTalk protocol

AF_LOCAL nil Host-internal protocols

PF_LOCAL nil Host-internal protocols

AF_IMPLINK nil ARPANET IMP protocol

PF_IMPLINK nil ARPANET IMP protocol

AF_PUP nil PARC Universal Packet protocol

PF_PUP nil PARC Universal Packet protocol

AF_CHAOS nil MIT CHAOS protocols

PF_CHAOS nil MIT CHAOS protocols

AF_NS nil XEROX NS protocols

PF_NS nil XEROX NS protocols

AF_ISO nil ISO Open Systems Interconnection protocols

PF_ISO nil ISO Open Systems Interconnection protocols

AF_OSI nil ISO Open Systems Interconnection protocols

PF_OSI nil ISO Open Systems Interconnection protocols

AF_ECMA nil European Computer Manufacturers protocols

PF_ECMA nil European Computer Manufacturers protocols

AF_DATAKIT nil Datakit protocol

PF_DATAKIT nil Datakit protocol

AF_CCITT nil CCITT (now ITU-T) protocols

PF_CCITT nil CCITT (now ITU-T) protocols

AF_SNA nil IBM SNA protocol

PF_SNA nil IBM SNA protocol

AF_DEC nil DECnet protocol

PF_DEC nil DECnet protocol

AF_DECnet nil DECnet protocol

PF_DECnet nil DECnet protocol

AF_DLI nil DEC Direct Data Link Interface protocol

PF_DLI nil DEC Direct Data Link Interface protocol

AF_LAT nil Local Area Transport protocol

PF_LAT nil Local Area Transport protocol

AF_HYLINK nil NSC Hyperchannel protocol

PF_HYLINK nil NSC Hyperchannel protocol

AF_ROUTE nil Internal routing protocol

PF_ROUTE nil Internal routing protocol

AF_LINK nil Link layer interface

PF_LINK nil Link layer interface

AF_COIP nil Connection-oriented IP

PF_COIP nil Connection-oriented IP

AF_CNT nil Computer Network Technology

PF_CNT nil Computer Network Technology

AF_SIP nil Simple Internet Protocol

PF_SIP nil Simple Internet Protocol

AF_NDRV nil Network driver raw access

PF_NDRV nil Network driver raw access

AF_ISDN nil Integrated Services Digital Network

PF_ISDN nil Integrated Services Digital Network

AF_NATM nil Native ATM access

PF_NATM nil Native ATM access

AF_SYSTEM nil Kernel event messages

PF_SYSTEM nil Kernel event messages

AF_NETBIOS nil NetBIOS

PF_NETBIOS nil NetBIOS

AF_PPP nil Point-to-Point Protocol

PF_PPP nil Point-to-Point Protocol

AF_ATM nil Asynchronous Transfer Mode

PF_ATM nil Asynchronous Transfer Mode

AF_NETGRAPH nil Netgraph sockets

PF_NETGRAPH nil Netgraph sockets

AF_MAX nil Maximum address family for this platform

PF_MAX nil Maximum address family for this platform

AF_PACKET nil Direct link-layer access

PF_PACKET nil Direct link-layer access

AF_E164 nil CCITT (ITU-T) E.164 recommendation

PF_XTP nil eXpress Transfer Protocol

PF_RTIP nil Help Identify RTIP packets

PF_PIP nil Help Identify PIP packets

AF_KEY nil Key management protocol, originally developed for usage with IPsec

PF_KEY nil Key management protocol, originally developed for usage with IPsec

AF_NETLINK nil Kernel user interface device

PF_NETLINK nil Kernel user interface device

AF_RDS nil Reliable Datagram Sockets (RDS) protocol

PF_RDS nil Reliable Datagram Sockets (RDS) protocol

AF_PPPOX nil Generic PPP transport layer, for setting up L2 tunnels (L2TP and PPPoE)

PF_PPPOX nil Generic PPP transport layer, for setting up L2 tunnels (L2TP and PPPoE)

AF_LLC nil Logical link control (IEEE 802.2 LLC) protocol

PF_LLC nil Logical link control (IEEE 802.2 LLC) protocol

AF_IB nil InfiniBand native addressing

PF_IB nil InfiniBand native addressing

AF_MPLS nil Multiprotocol Label Switching

PF_MPLS nil Multiprotocol Label Switching

AF_CAN nil Controller Area Network automotive bus protocol

PF_CAN nil Controller Area Network automotive bus protocol

AF_TIPC nil TIPC, "cluster domain sockets" protocol

PF_TIPC nil TIPC, "cluster domain sockets" protocol

AF_BLUETOOTH nil Bluetooth low-level socket protocol

PF_BLUETOOTH nil Bluetooth low-level socket protocol

AF_ALG nil Interface to kernel crypto API

PF_ALG nil Interface to kernel crypto API

AF_VSOCK nil VSOCK (originally "VMWare VSockets") protocol for hypervisor-guest communication

PF_VSOCK nil VSOCK (originally "VMWare VSockets") protocol for hypervisor-guest communication

AF_KCM nil KCM (kernel connection multiplexor) interface

PF_KCM nil KCM (kernel connection multiplexor) interface

AF_XDP nil XDP (express data path) interface

PF_XDP nil XDP (express data path) interface

MSG_OOB nil Process out-of-band data

MSG_PEEK nil Peek at incoming message

MSG_DONTROUTE nil Send without using the routing tables

MSG_EOR nil Data completes record

MSG_TRUNC nil Data discarded before delivery

MSG_CTRUNC nil Control data lost before delivery

MSG_WAITALL nil Wait for full request or error

MSG_DONTWAIT nil This message should be non-blocking

MSG_EOF nil Data completes connection

MSG_FLUSH nil Start of a hold sequence. Dumps to so_temp

MSG_HOLD nil Hold fragment in so_temp

MSG_SEND nil Send the packet in so_temp

MSG_HAVEMORE nil Data ready to be read

MSG_RCVMORE nil Data remains in the current packet

MSG_COMPAT nil End of record

MSG_PROXY nil Wait for full request

MSG_FIN

MSG_SYN

MSG_CONFIRM nil Confirm path validity

MSG_RST

MSG_ERRQUEUE nil Fetch message from error queue

MSG_NOSIGNAL nil Do not generate SIGPIPE

MSG_MORE nil Sender will send more

MSG_FASTOPEN nil Reduce step of the handshake process

SOL_SOCKET nil Socket-level options

SOL_IP nil IP socket options

SOL_IPX nil IPX socket options

SOL_AX25 nil AX.25 socket options

SOL_ATALK nil AppleTalk socket options

SOL_TCP nil TCP socket options

SOL_UDP nil UDP socket options

IPPROTO_IP 0 Dummy protocol for IP

IPPROTO_ICMP 1 Control message protocol

IPPROTO_IGMP nil Group Management Protocol

IPPROTO_GGP nil Gateway to Gateway Protocol

IPPROTO_TCP 6 TCP

IPPROTO_EGP nil Exterior Gateway Protocol

IPPROTO_PUP nil PARC Universal Packet protocol

IPPROTO_UDP 17 UDP

IPPROTO_IDP nil XNS IDP

IPPROTO_HELLO nil "hello" routing protocol

IPPROTO_ND nil Sun net disk protocol

IPPROTO_TP nil ISO transport protocol class 4

IPPROTO_XTP nil Xpress Transport Protocol

IPPROTO_EON nil ISO cnlp

IPPROTO_BIP

IPPROTO_AH nil IP6 auth header

IPPROTO_DSTOPTS nil IP6 destination option

IPPROTO_ESP nil IP6 Encapsulated Security Payload

IPPROTO_FRAGMENT nil IP6 fragmentation header

IPPROTO_HOPOPTS nil IP6 hop-by-hop options

IPPROTO_ICMPV6 nil ICMP6

IPPROTO_IPV6 nil IP6 header

IPPROTO_NONE nil IP6 no next header

IPPROTO_ROUTING nil IP6 routing header

IPPROTO_RAW 255 Raw IP packet

IPPROTO_MAX nil Maximum IPPROTO constant

# Some port configuration

IPPORT_RESERVED 1024 Default minimum address for bind or connect

IPPORT_USERRESERVED 5000 Default maximum address for bind or connect

# Some reserved IP v.4 addresses

INADDR_ANY 0x00000000 A socket bound to INADDR_ANY receives packets from all interfaces and sends from the default IP address

INADDR_BROADCAST 0xffffffff The network broadcast address

INADDR_LOOPBACK 0x7F000001 The loopback address

INADDR_UNSPEC_GROUP 0xe0000000 The reserved multicast group

INADDR_ALLHOSTS_GROUP 0xe0000001 Multicast group for all systems on this subset

INADDR_MAX_LOCAL_GROUP 0xe00000ff The last local network multicast group

INADDR_NONE 0xffffffff A bitmask for matching no valid IP address

# IP [gs]etsockopt options

IP_OPTIONS nil IP options to be included in packets

IP_HDRINCL nil Header is included with data

IP_TOS nil IP type-of-service

IP_TTL nil IP time-to-live

IP_RECVOPTS nil Receive all IP options with datagram

IP_RECVRETOPTS nil Receive all IP options for response

IP_RECVDSTADDR nil Receive IP destination address with datagram

IP_RETOPTS nil IP options to be included in datagrams

IP_MINTTL nil Minimum TTL allowed for received packets

IP_DONTFRAG nil Don't fragment packets

IP_SENDSRCADDR nil Source address for outgoing UDP datagrams

IP_ONESBCAST nil Force outgoing broadcast datagrams to have the undirected broadcast address

IP_RECVTTL nil Receive IP TTL with datagrams

IP_RECVIF nil Receive interface information with datagrams

IP_RECVSLLA nil Receive link-layer address with datagrams

IP_PORTRANGE nil Set the port range for sockets with unspecified port numbers

IP_MULTICAST_IF nil IP multicast interface

IP_MULTICAST_TTL nil IP multicast TTL

IP_MULTICAST_LOOP nil IP multicast loopback

IP_ADD_MEMBERSHIP nil Add a multicast group membership

IP_DROP_MEMBERSHIP nil Drop a multicast group membership

IP_DEFAULT_MULTICAST_TTL nil Default multicast TTL

IP_DEFAULT_MULTICAST_LOOP nil Default multicast loopback

IP_MAX_MEMBERSHIPS nil Maximum number multicast groups a socket can join

IP_ROUTER_ALERT nil Notify transit routers to more closely examine the contents of an IP packet

IP_PKTINFO nil Receive packet information with datagrams

IP_PKTOPTIONS nil Receive packet options with datagrams

IP_MTU_DISCOVER nil Path MTU discovery

IP_RECVERR nil Enable extended reliable error message passing

IP_RECVTOS nil Receive TOS with incoming packets

IP_MTU nil The Maximum Transmission Unit of the socket

IP_FREEBIND nil Allow binding to nonexistent IP addresses

IP_IPSEC_POLICY nil IPsec security policy

IP_XFRM_POLICY

IP_PASSSEC nil Retrieve security context with datagram

IP_TRANSPARENT nil Transparent proxy

IP_PMTUDISC_DONT nil Never send DF frames

IP_PMTUDISC_WANT nil Use per-route hints

IP_PMTUDISC_DO nil Always send DF frames

IP_UNBLOCK_SOURCE nil Unblock IPv4 multicast packets with a give source address

IP_BLOCK_SOURCE nil Block IPv4 multicast packets with a give source address

IP_ADD_SOURCE_MEMBERSHIP nil Add a multicast group membership

IP_DROP_SOURCE_MEMBERSHIP nil Drop a multicast group membership

IP_MSFILTER nil Multicast source filtering

MCAST_JOIN_GROUP nil Join a multicast group

MCAST_BLOCK_SOURCE nil Block multicast packets from this source

MCAST_UNBLOCK_SOURCE nil Unblock multicast packets from this source

MCAST_LEAVE_GROUP nil Leave a multicast group

MCAST_JOIN_SOURCE_GROUP nil Join a multicast source group

MCAST_LEAVE_SOURCE_GROUP nil Leave a multicast source group

MCAST_MSFILTER nil Multicast source filtering

MCAST_EXCLUDE nil Exclusive multicast source filter

MCAST_INCLUDE nil Inclusive multicast source filter

SO_DEBUG nil Debug info recording

SO_REUSEADDR nil Allow local address reuse

SO_REUSEPORT nil Allow local address and port reuse

SO_TYPE nil Get the socket type

SO_ERROR nil Get and clear the error status

SO_DONTROUTE nil Use interface addresses

SO_BROADCAST nil Permit sending of broadcast messages

SO_SNDBUF nil Send buffer size

SO_RCVBUF nil Receive buffer size

SO_SNDBUFFORCE nil Send buffer size without wmem_max limit (Linux 2.6.14)

SO_RCVBUFFORCE nil Receive buffer size without rmem_max limit (Linux 2.6.14)

SO_KEEPALIVE nil Keep connections alive

SO_OOBINLINE nil Leave received out-of-band data in-line

SO_NO_CHECK nil Disable checksums

SO_PRIORITY nil The protocol-defined priority for all packets on this socket

SO_LINGER nil Linger on close if data is present

SO_PASSCRED nil Receive SCM_CREDENTIALS messages

SO_PEERCRED nil The credentials of the foreign process connected to this socket

SO_RCVLOWAT nil Receive low-water mark

SO_SNDLOWAT nil Send low-water mark

SO_RCVTIMEO nil Receive timeout

SO_SNDTIMEO nil Send timeout

SO_ACCEPTCONN nil Socket has had listen() called on it

SO_USELOOPBACK nil Bypass hardware when possible

SO_ACCEPTFILTER nil There is an accept filter

SO_USER_COOKIE nil Setting an identifier for ipfw purpose mainly

SO_DONTTRUNC nil Retain unread data

SO_WANTMORE nil Give a hint when more data is ready

SO_WANTOOBFLAG nil OOB data is wanted in MSG_FLAG on receive

SO_NREAD nil Get first packet byte count

SO_NKE nil Install socket-level Network Kernel Extension

SO_NOSIGPIPE nil Don't SIGPIPE on EPIPE

SO_SECURITY_AUTHENTICATION

SO_SECURITY_ENCRYPTION_TRANSPORT

SO_SECURITY_ENCRYPTION_NETWORK

SO_BINDTODEVICE nil Only send packets from the given interface

SO_ATTACH_FILTER nil Attach an accept filter

SO_DETACH_FILTER nil Detach an accept filter

SO_GET_FILTER nil Obtain filter set by SO_ATTACH_FILTER (Linux 3.8)

SO_PEERNAME nil Name of the connecting user

SO_TIMESTAMP nil Receive timestamp with datagrams (timeval)

SO_TIMESTAMPNS nil Receive nanosecond timestamp with datagrams (timespec)

SO_BINTIME nil Receive timestamp with datagrams (bintime)

SO_RECVUCRED nil Receive user credentials with datagram

SO_MAC_EXEMPT nil Mandatory Access Control exemption for unlabeled peers

SO_ALLZONES nil Bypass zone boundaries

SO_PEERSEC nil Obtain the security credentials (Linux 2.6.2)

SO_PASSSEC nil Toggle security context passing (Linux 2.6.18)

SO_MARK nil Set the mark for mark-based routing (Linux 2.6.25)

SO_TIMESTAMPING nil Time stamping of incoming and outgoing packets (Linux 2.6.30)

SO_PROTOCOL nil Protocol given for socket() (Linux 2.6.32)

SO_DOMAIN nil Domain given for socket() (Linux 2.6.32)

SO_RXQ_OVFL nil Toggle cmsg for number of packets dropped (Linux 2.6.33)

SO_WIFI_STATUS nil Toggle cmsg for wifi status (Linux 3.3)

SO_PEEK_OFF nil Set the peek offset (Linux 3.4)

SO_NOFCS nil Set netns of a socket (Linux 3.4)

SO_LOCK_FILTER nil Lock the filter attached to a socket (Linux 3.9)

SO_SELECT_ERR_QUEUE nil Make select() detect socket error queue with errorfds (Linux 3.10)

SO_BUSY_POLL nil Set the threshold in microseconds for low latency polling (Linux 3.11)

SO_MAX_PACING_RATE nil Cap the rate computed by transport layer. [bytes per second] (Linux 3.13)

SO_BPF_EXTENSIONS nil Query supported BPF extensions (Linux 3.14)

SO_SETFIB nil Set the associated routing table for the socket (FreeBSD)

SO_RTABLE nil Set the routing table for this socket (OpenBSD)

SO_INCOMING_CPU nil Receive the cpu attached to the socket (Linux 3.19)

SO_INCOMING_NAPI_ID nil Receive the napi ID attached to a RX queue (Linux 4.12)

SOPRI_INTERACTIVE nil Interactive socket priority

SOPRI_NORMAL nil Normal socket priority

SOPRI_BACKGROUND nil Background socket priority

IPX_TYPE

TCP_NODELAY nil Don't delay sending to coalesce packets

TCP_MAXSEG nil Set maximum segment size

TCP_CONNECTION_INFO nil Retrieve information about this socket (macOS)

TCP_CORK nil Don't send partial frames (Linux 2.2, glibc 2.2)

TCP_DEFER_ACCEPT nil Don't notify a listening socket until data is ready (Linux 2.4, glibc 2.2)

TCP_INFO nil Retrieve information about this socket (Linux 2.4, glibc 2.2)

TCP_KEEPALIVE nil Idle time before keepalive probes are sent (macOS)

TCP_KEEPCNT nil Maximum number of keepalive probes allowed before dropping a connection (Linux 2.4, glibc 2.2)

TCP_KEEPIDLE nil Idle time before keepalive probes are sent (Linux 2.4, glibc 2.2)

TCP_KEEPINTVL nil Time between keepalive probes (Linux 2.4, glibc 2.2)

TCP_LINGER2 nil Lifetime of orphaned FIN_WAIT2 sockets (Linux 2.4, glibc 2.2)

TCP_MD5SIG nil Use MD5 digests (RFC2385, Linux 2.6.20, glibc 2.7)

TCP_NOOPT nil Don't use TCP options

TCP_NOPUSH nil Don't push the last block of write

TCP_QUICKACK nil Enable quickack mode (Linux 2.4.4, glibc 2.3)

TCP_SYNCNT nil Number of SYN retransmits before a connection is dropped (Linux 2.4, glibc 2.2)

TCP_WINDOW_CLAMP nil Clamp the size of the advertised window (Linux 2.4, glibc 2.2)

TCP_FASTOPEN nil Reduce step of the handshake process (Linux 3.7, glibc 2.18)

TCP_CONGESTION nil TCP congestion control algorithm (Linux 2.6.13, glibc 2.6)

TCP_COOKIE_TRANSACTIONS nil TCP Cookie Transactions (Linux 2.6.33, glibc 2.18)

TCP_QUEUE_SEQ nil Sequence of a queue for repair mode (Linux 3.5, glibc 2.18)

TCP_REPAIR nil Repair mode (Linux 3.5, glibc 2.18)

TCP_REPAIR_OPTIONS nil Options for repair mode (Linux 3.5, glibc 2.18)

TCP_REPAIR_QUEUE nil Queue for repair mode (Linux 3.5, glibc 2.18)

TCP_THIN_DUPACK nil Duplicated acknowledgments handling for thin-streams (Linux 2.6.34, glibc 2.18)

TCP_THIN_LINEAR_TIMEOUTS nil Linear timeouts for thin-streams (Linux 2.6.34, glibc 2.18)

TCP_TIMESTAMP nil TCP timestamp (Linux 3.9, glibc 2.18)

TCP_USER_TIMEOUT nil Max timeout before a TCP connection is aborted (Linux 2.6.37, glibc 2.18)

UDP_CORK nil Don't send partial frames (Linux 2.5.44, glibc 2.11)

EAI_ADDRFAMILY nil Address family for hostname not supported

EAI_AGAIN nil Temporary failure in name resolution

EAI_BADFLAGS nil Invalid flags

EAI_FAIL nil Non-recoverable failure in name resolution

EAI_FAMILY nil Address family not supported

EAI_MEMORY nil Memory allocation failure

EAI_NODATA nil No address associated with hostname

EAI_NONAME nil Hostname nor servname, or not known

EAI_OVERFLOW nil Argument buffer overflow

EAI_SERVICE nil Servname not supported for socket type

EAI_SOCKTYPE nil Socket type not supported

EAI_SYSTEM nil System error returned in errno

EAI_BADHINTS nil Invalid value for hints

EAI_PROTOCOL nil Resolved protocol is unknown

EAI_MAX nil Maximum error code from getaddrinfo

AI_PASSIVE nil Get address to use with bind()

AI_CANONNAME nil Fill in the canonical name

AI_NUMERICHOST nil Prevent host name resolution

AI_NUMERICSERV nil Prevent service name resolution

AI_MASK nil Valid flag mask for getaddrinfo (not for application use)

AI_ALL nil Allow all addresses

AI_V4MAPPED_CFG nil Accept IPv4 mapped addresses if the kernel supports it

AI_ADDRCONFIG nil Accept only if any address is assigned

AI_V4MAPPED nil Accept IPv4-mapped IPv6 addresses

AI_DEFAULT nil Default flags for getaddrinfo

NI_MAXHOST nil Maximum length of a hostname

NI_MAXSERV nil Maximum length of a service name

NI_NOFQDN nil An FQDN is not required for local hosts, return only the local part

NI_NUMERICHOST nil Return a numeric address

NI_NAMEREQD nil A name is required

NI_NUMERICSERV nil Return the service name as a digit string

NI_DGRAM nil The service specified is a datagram service (looks up UDP ports)

SHUT_RD 0 Shut down the reading side of the socket

SHUT_WR 1 Shut down the writing side of the socket

SHUT_RDWR 2 Shut down the both sides of the socket

IPV6_JOIN_GROUP nil Join a group membership

IPV6_LEAVE_GROUP nil Leave a group membership

IPV6_MULTICAST_HOPS nil IP6 multicast hops

IPV6_MULTICAST_IF nil IP6 multicast interface

IPV6_MULTICAST_LOOP nil IP6 multicast loopback

IPV6_UNICAST_HOPS nil IP6 unicast hops

IPV6_V6ONLY nil Only bind IPv6 with a wildcard bind

IPV6_CHECKSUM nil Checksum offset for raw sockets

IPV6_DONTFRAG nil Don't fragment packets

IPV6_DSTOPTS nil Destination option

IPV6_HOPLIMIT nil Hop limit

IPV6_HOPOPTS nil Hop-by-hop option

IPV6_NEXTHOP nil Next hop address

IPV6_PATHMTU nil Retrieve current path MTU

IPV6_PKTINFO nil Receive packet information with datagram

IPV6_RECVDSTOPTS nil Receive all IP6 options for response

IPV6_RECVHOPLIMIT nil Receive hop limit with datagram

IPV6_RECVHOPOPTS nil Receive hop-by-hop options

IPV6_RECVPKTINFO nil Receive destination IP address and incoming interface

IPV6_RECVRTHDR nil Receive routing header

IPV6_RECVTCLASS nil Receive traffic class

IPV6_RTHDR nil Allows removal of sticky routing headers

IPV6_RTHDRDSTOPTS nil Allows removal of sticky destination options header

IPV6_RTHDR_TYPE_0 nil Routing header type 0

IPV6_RECVPATHMTU nil Receive current path MTU with datagram

IPV6_TCLASS nil Specify the traffic class

IPV6_USE_MIN_MTU nil Use the minimum MTU size

INET_ADDRSTRLEN 16 Maximum length of an IPv4 address string

INET6_ADDRSTRLEN 46 Maximum length of an IPv6 address string

IFNAMSIZ nil Maximum interface name size

IF_NAMESIZE nil Maximum interface name size

SOMAXCONN 5 Maximum connection requests that may be queued for a socket

SCM_RIGHTS nil Access rights

SCM_TIMESTAMP nil Timestamp (timeval)

SCM_TIMESTAMPNS nil Timespec (timespec)

SCM_TIMESTAMPING nil Timestamp (timespec list) (Linux 2.6.30)

SCM_BINTIME nil Timestamp (bintime)

SCM_CREDENTIALS nil The sender's credentials

SCM_CREDS nil Process credentials

SCM_UCRED nil User credentials

SCM_WIFI_STATUS nil Wifi status (Linux 3.3)

LOCAL_PEERCRED nil Retrieve peer credentials

LOCAL_CREDS nil Pass credentials to receiver

LOCAL_CONNWAIT nil Connect blocks until accepted

IFF_802_1Q_VLAN nil 802.1Q VLAN device

IFF_ALLMULTI nil receive all multicast packets

IFF_ALTPHYS nil use alternate physical connection

IFF_AUTOMEDIA nil auto media select active

IFF_BONDING nil bonding master or slave

IFF_BRIDGE_PORT nil device used as bridge port

IFF_BROADCAST nil broadcast address valid

IFF_CANTCONFIG nil unconfigurable using ioctl(2)

IFF_DEBUG nil turn on debugging

IFF_DISABLE_NETPOLL nil disable netpoll at run-time

IFF_DONT_BRIDGE nil disallow bridging this ether dev

IFF_DORMANT nil driver signals dormant

IFF_DRV_OACTIVE nil tx hardware queue is full

IFF_DRV_RUNNING nil resources allocated

IFF_DYING nil interface is winding down

IFF_DYNAMIC nil dialup device with changing addresses

IFF_EBRIDGE nil ethernet bridging device

IFF_ECHO nil echo sent packets

IFF_ISATAP nil ISATAP interface (RFC4214)

IFF_LINK0 nil per link layer defined bit 0

IFF_LINK1 nil per link layer defined bit 1

IFF_LINK2 nil per link layer defined bit 2

IFF_LIVE_ADDR_CHANGE nil hardware address change when it's running

IFF_LOOPBACK nil loopback net

IFF_LOWER_UP nil driver signals L1 up

IFF_MACVLAN_PORT nil device used as macvlan port

IFF_MASTER nil master of a load balancer

IFF_MASTER_8023AD nil bonding master, 802.3ad.

IFF_MASTER_ALB nil bonding master, balance-alb.

IFF_MASTER_ARPMON nil bonding master, ARP mon in use

IFF_MONITOR nil user-requested monitor mode

IFF_MULTICAST nil supports multicast

IFF_NOARP nil no address resolution protocol

IFF_NOTRAILERS nil avoid use of trailers

IFF_OACTIVE nil transmission in progress

IFF_OVS_DATAPATH nil device used as Open vSwitch datapath port

IFF_POINTOPOINT nil point-to-point link

IFF_PORTSEL nil can set media type

IFF_PPROMISC nil user-requested promisc mode

IFF_PROMISC nil receive all packets

IFF_RENAMING nil interface is being renamed

IFF_ROUTE nil routing entry installed

IFF_RUNNING nil resources allocated

IFF_SIMPLEX nil can't hear own transmissions

IFF_SLAVE nil slave of a load balancer

IFF_SLAVE_INACTIVE nil bonding slave not the curr. active

IFF_SLAVE_NEEDARP nil need ARPs for validation

IFF_SMART nil interface manages own routes

IFF_STATICARP nil static ARP

IFF_SUPP_NOFCS nil sending custom FCS

IFF_TEAM_PORT nil used as team port

IFF_TX_SKB_SHARING nil sharing skbs on transmit

IFF_UNICAST_FLT nil unicast filtering

IFF_UP nil interface is up

IFF_WAN_HDLC nil WAN HDLC device

IFF_XMIT_DST_RELEASE nil dev_hard_start_xmit() is allowed to release skb->dst

IFF_VOLATILE nil volatile flags

IFF_CANTCHANGE nil flags not changeable