# 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 COMMENTS[name] = comment } DEFS = h.to_a def each_const DEFS.each {|name, default_value| guard = nil if /\A(AF_INET6|PF_INET6|IPV6_.*)\z/ =~ name # IPv6 is not supported although AF_INET6 is defined on mingw guard = "defined(INET6)" end yield guard, name, default_value } end def each_name(pat) DEFS.each {|name, default_value| next if pat !~ name yield name } 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) DEFS.reverse_each {|name, default_value| next if pat !~ name yield name } end def each_names_with_len(pat, prefix_optional=nil) h = {} DEFS.each {|name, default_value| next if pat !~ name (h[name.length] ||= []) << [name, name] } if prefix_optional if Regexp === prefix_optional prefix_pat = prefix_optional else prefix_pat = /\A#{Regexp.escape prefix_optional}/ end DEFS.each {|const, default_value| next if pat !~ const next if prefix_pat !~ const name = $' (h[name.length] ||= []) << [name, const] } end hh = {} h.each {|len, pairs| pairs.each {|name, const| raise "name crash: #{name}" if hh[name] hh[name] = true } } h.keys.sort.each {|len| yield h[len], len } 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) decl = gen_name_to_int_decl(funcname, pat, prefix_optional, guard) func = gen_name_to_int_func(funcname, pat, prefix_optional, guard) NAME_TO_INT_DEFS << [decl, func] end def reverse_each_name_with_prefix_optional(pat, prefix_pat) reverse_each_name(pat) {|n| yield n, n } if prefix_pat reverse_each_name(pat) {|n| next if prefix_pat !~ n yield n, $' } end 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) prefix_pat = nil if prefix_optional if Regexp === prefix_optional prefix_pat = prefix_optional else prefix_pat = /\A#{Regexp.escape prefix_optional}/ end end hash_var = "#{func_name}_hash" vardef = "static st_table *#{hash_var};" gen_hash = gen_int_to_name_hash(hash_var, pat, prefix_pat) decl = gen_int_to_name_decl(func_name, hash_var) func = gen_int_to_name_func(func_name, hash_var) INTERN_DEFS << [vardef, gen_hash, decl, func] 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 PF_SYSTEM 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 PF_PIP 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_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) 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_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_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