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inet(3erl)			     Erlang Module Definition			       inet(3erl)

NAME
       inet - Access to TCP/IP Protocols

DESCRIPTION
       Provides access to TCP/IP protocols.

       See also ERTS User's Guide, Inet configuration for more information on how to configure an
       Erlang runtime system for IP communication.

       Two Kernel configuration parameters affect the behaviour  of  all  sockets  opened  on  an
       Erlang  node:  inet_default_connect_options can contain a list of default options used for
       all sockets returned when doing connect , and inet_default_listen_options  can  contain	a
       list of default options used when issuing a listen call. When accept is issued, the values
       of the listensocket options are inherited, why no such application variable is needed  for
       accept .

       Using the Kernel configuration parameters mentioned above, one can set default options for
       all  TCP  sockets  on  a  node.	This  should  be  used	with  care,  but   options   like
       {delay_send,true}  might  be  specified in this way. An example of starting an Erlang node
       with all sockets using delayed send could look like this:

       $ erl -sname test -kernel \
       inet_default_connect_options '[{delay_send,true}]' \
       inet_default_listen_options '[{delay_send,true}]'

       Note that the default option {active, true} currently cannot be changed, for internal rea-
       sons.

DATA TYPES
       #hostent{h_addr_list = [ip_address()]  % list of addresses for this host
		h_addrtype  = inet | inet6
		h_aliases = [hostname()]      % list of aliases
		h_length = int()	      % length of address in bytes
		h_name = hostname()	      % official name for host
	 The record is defined in the Kernel include file "inet.hrl"
	 Add the following directive to the module:
	   -include_lib("kernel/include/inet.hrl").

       hostname() = atom() | string()

       ip_address() = {N1,N2,N3,N4}		 % IPv4
		    | {K1,K2,K3,K4,K5,K6,K7,K8}  % IPv6
	 Ni = 0..255
	 Ki = 0..65535

       posix()
	 an atom which is named from the Posix error codes used in
	 Unix, and in the runtime libraries of most C compilers

       socket()
	 see gen_tcp(3erl), gen_udp(3erl)

       Addresses  as  inputs to functions can be either a string or a tuple. For instance, the IP
       address	150.236.20.73  can  be	passed	to   gethostbyaddr/1   either	as   the   string
       "150.236.20.73" or as the tuple {150, 236, 20, 73} .

       IPv4 address examples:

       Address		ip_address()
       -------		------------
       127.0.0.1	{127,0,0,1}
       192.168.42.2	{192,168,42,2}

       IPv6 address examples:

       Address		ip_address()
       -------		------------
       ::1	       {0,0,0,0,0,0,0,1}
       ::192.168.42.2  {0,0,0,0,0,0,(192 bsl 8) bor 168,(42 bsl 8) bor 2}
       FFFF::192.168.42.2
		       {16#FFFF,0,0,0,0,0,(192 bsl 8) bor 168,(42 bsl 8) bor 2}
       3ffe:b80:1f8d:2:204:acff:fe17:bf38
		       {16#3ffe,16#b80,16#1f8d,16#2,16#204,16#acff,16#fe17,16#bf38}
       fe80::204:acff:fe17:bf38
		       {16#fe80,0,0,0,0,16#204,16#acff,16#fe17,16#bf38}

       A function that may be useful is inet_parse:address/1 :

       1> inet_parse:address("192.168.42.2").
       {ok,{192,168,42,2}}
       2> inet_parse:address("FFFF::192.168.42.2").
       {ok,{65535,0,0,0,0,0,49320,10754}}

EXPORTS
       close(Socket) -> ok

	      Types  Socket = socket()

	      Closes a socket of any type.

       get_rc() -> [{Par, Val}]

	      Types  Par, Val -- see below

	      Returns  the state of the Inet configuration database in form of a list of recorded
	      configuration parameters. (See the ERTS User's Guide, Inet configuration, for  more
	      information). Only parameters with other than default values are returned.

       format_error(Posix) -> string()

	      Types  Posix = posix()

	      Returns  a diagnostic error string. See the section below for possible Posix values
	      and the corresponding strings.

       getaddr(Host, Family) -> {ok, Address} | {error, posix()}

	      Types  Host = ip_address() | string() | atom()
		     Family = inet | inet6
		     Address = ip_address()
		     posix() = term()

	      Returns the IP-address for Host as a tuple of integers. Host can be an  IP-address,
	      a single hostname or a fully qualified hostname.

       getaddrs(Host, Family) -> {ok, Addresses} | {error, posix()}

	      Types  Host = ip_address() | string() | atom()
		     Addresses = [ip_address()]
		     Family = inet | inet6

	      Returns  a  list of all IP-addresses for Host . Host can be an IP-address, a single
	      hostname or a fully qualified hostname.

       gethostbyaddr(Address) -> {ok, Hostent} | {error, posix()}

	      Types  Address = string() | ip_address()
		     Hostent = #hostent{}

	      Returns a hostent record given an address.

       gethostbyname(Name) -> {ok, Hostent} | {error, posix()}

	      Types  Hostname = hostname()
		     Hostent = #hostent{}

	      Returns a hostent record given a hostname.

       gethostbyname(Name, Family) -> {ok, Hostent} | {error, posix()}

	      Types  Hostname = hostname()
		     Family = inet | inet6
		     Hostent = #hostent{}

	      Returns a hostent record given a hostname, restricted to the given address family.

       gethostname() -> {ok, Hostname}

	      Types  Hostname = string()

	      Returns the local hostname. Will never fail.

       getifaddrs() -> {ok,Iflist} | {error,posix}

	      Types  Iflist = {Ifname,[Ifopt]}
		     Ifname = string()
		     Ifopt = {flag,[Flag]} | {addr,Addr} | {netmask,Netmask} |	{broadaddr,Broad-
		     addr} | {dstaddr,Dstaddr} | {hwaddr,Hwaddr}
		     Flag = up | broadcast | loopback | pointtopoint | running | multicast
		     Addr = Netmask = Broadadddr = Dstaddr = ip_address()
		     Hwaddr = [byte()]

	      Returns  a  list	of  2-tuples  containing  interface  names  and  the  interface's
	      addresses. Ifname is a Unicode string. Hwaddr is hardware dependent, e.g on  Ether-
	      net interfaces it is the 6-byte Ethernet address (MAC address (EUI-48 address)).

	      The  {addr,Addr}	, {netmask,_} and {broadaddr,_} tuples are repeated in the result
	      list iff the interface has multiple addresses. If you come across an interface that
	      has  multiple  {flag,_} or {hwaddr,_} tuples you have a really strange interface or
	      possibly a bug in this  function.  The  {flag,_}	tuple  is  mandatory,  all  other
	      optional.

	      Do  not  rely  too  much on the order of Flag atoms or Ifopt tuples. There are some
	      rules, though:

		* Immediately after {addr,_} follows {netmask,_}

		* Immediately thereafter follows {broadaddr,_} if the broadcast flag is  not  set
		  and the pointtopoint flag is set.

		* Any  {netmask,_}  , {broadaddr,_} or {dstaddr,_} tuples that follow an {addr,_}
		  tuple concerns that address.

	      The {hwaddr,_} tuple is not returned on Solaris since the hardware address histori-
	      cally belongs to the link layer and only the superuser can read such addresses.

	      On  Windows, the data is fetched from quite different OS API functions, so the Net-
	      mask and Broadaddr values may be calculated, just as some  Flag  values.	You  have
	      been warned. Report flagrant bugs.

       getopts(Socket, Options) -> {ok, OptionValues} | {error, posix()}

	      Types  Socket = term()
		     Options = [Opt | RawOptReq]
		     Opt = atom()
		     RawOptReq = {raw, Protocol, OptionNum, ValueSpec}
		     Protocol = int()
		     OptionNum = int()
		     ValueSpec = ValueSize | ValueBin
		     ValueSize = int()
		     ValueBin = binary()
		     OptionValues = [{Opt, Val} | {raw, Protocol, OptionNum, ValueBin}]

	      Gets  one  or  more  options  for  a  socket. See setopts/2 for a list of available
	      options.

	      The number of elements in the returned OptionValues list does not necessarily  cor-
	      respond  to  the number of options asked for. If the operating system fails to sup-
	      port an option, it is simply left out in the returned list. An error tuple is  only
	      returned	when  getting  options	for  the socket is impossible (i.e. the socket is
	      closed or the buffer size in a raw request is too large). This behavior is kept for
	      backward compatibility reasons.

	      A  RawOptReq  can  be used to get information about socket options not (explicitly)
	      supported by the emulator. The use of raw socket options makes the code non  porta-
	      ble, but allows the Erlang programmer to take advantage of unusual features present
	      on the current platform.

	      The RawOptReq consists of the tag raw followed by the protocol  level,  the  option
	      number and either a binary or the size, in bytes, of the buffer in which the option
	      value is to be stored. A binary should  be  used	when  the  underlying  getsockopt
	      requires	input  in the argument field, in which case the size of the binary should
	      correspond to the required buffer size of the return value. The supplied values  in
	      a RawOptReq correspond to the second, third and fourth/fifth parameters to the get-
	      sockopt call in the C socket API. The value stored in the buffer is returned  as	a
	      binary ValueBin where all values are coded in the native endianess.

	      Asking  for  and	inspecting raw socket options require low level information about
	      the current operating system and TCP stack.

	      As an example, consider a Linux machine where the TCP_INFO option could be used  to
	      collect  TCP  statistics for a socket. Lets say we're interested in the tcpi_sacked
	      field of the struct tcp_info filled in when asking for TCP_INFO .  To  be  able  to
	      access  this  information,  we  need to know both the numeric value of the protocol
	      level IPPROTO_TCP , the numeric value of the option TCP_INFO  ,  the  size  of  the
	      struct  tcp_info	and  the size and offset of the specific field. By inspecting the
	      headers or writing a small C program, we found IPPROTO_TCP to be 6, TCP_INFO to  be
	      11,  the	structure size to be 92 (bytes), the offset of tcpi_sacked to be 28 bytes
	      and the actual value to be a 32 bit integer. We could use  the  following  code  to
	      retrieve the value:

		      get_tcpi_sacked(Sock) ->
			  {ok,[{raw,_,_,Info}]} = inet:getopts(Sock,[{raw,6,11,92}]),
			  <<_:28/binary,TcpiSacked:32/native,_/binary>> = Info,
			  TcpiSacked.

	      Preferably,  you	would check the machine type, the OS and the kernel version prior
	      to executing anything similar to the code above.

       getstat(Socket)
       getstat(Socket, Options) -> {ok, OptionValues} | {error, posix()}

	      Types  Socket = term()
		     Options = [Opt]
		     OptionValues = [{Opt, Val}]
		     Opt, Val -- see below

	      Gets one or more statistic options for a socket.

	      getstat(Socket) is equivalent to	getstat(Socket,  [recv_avg,  recv_cnt,	recv_dvi,
	      recv_max, recv_oct, send_avg, send_cnt, send_dvi, send_max, send_oct])

	      The following options are available:

		recv_avg :
		  Average size of packets in bytes received to the socket.

		recv_cnt :
		  Number of packets received to the socket.

		recv_dvi :
		  Average packet size deviation in bytes received to the socket.

		recv_max :
		  The size of the largest packet in bytes received to the socket.

		recv_oct :
		  Number of bytes received to the socket.

		send_avg :
		  Average size of packets in bytes sent from the socket.

		send_cnt :
		  Number of packets sent from the socket.

		send_dvi :
		  Average packet size deviation in bytes received sent from the socket.

		send_max :
		  The size of the largest packet in bytes sent from the socket.

		send_oct :
		  Number of bytes sent from the socket.

       peername(Socket) -> {ok, {Address, Port}} | {error, posix()}

	      Types  Socket = socket()
		     Address = ip_address()
		     Port = int()

	      Returns the address and port for the other end of a connection.

       port(Socket) -> {ok, Port}

	      Types  Socket = socket()
		     Port = int()

	      Returns the local port number for a socket.

       sockname(Socket) -> {ok, {Address, Port}} | {error, posix()}

	      Types  Socket = socket()
		     Address = ip_address()
		     Port = int()

	      Returns the local address and port number for a socket.

       setopts(Socket, Options) -> ok | {error, posix()}

	      Types  Socket = term()
		     Options = [{Opt, Val} | {raw, Protocol, Option, ValueBin}]
		     Protocol = int()
		     OptionNum = int()
		     ValueBin = binary()
		     Opt, Val -- see below

	      Sets one or more options for a socket. The following options are available:

		{active, true | false | once} :
		  If  the  value  is  true  ,  which is the default, everything received from the
		  socket will be sent as messages to the receiving process. If the value is false
		  (passive  mode),  the  process must explicitly receive incoming data by calling
		  gen_tcp:recv/2,3 or gen_udp:recv/2,3 (depending on the type of socket).

		  If the value is once ( {active, once} ), one data message from the socket  will
		  be  sent  to the process. To receive one more message, setopts/2 must be called
		  again with the {active, once} option.

		  When using {active, once} , the socket  changes  behaviour  automatically  when
		  data	is  received. This can sometimes be confusing in combination with connec-
		  tion oriented sockets (i.e. gen_tcp ) as a socket with {active,  false}  behav-
		  iour	reports  closing differently than a socket with {active, true} behaviour.
		  To make programming easier, a  socket  where	the  peer  closed  and	this  was
		  detected  while  in  {active,  false}  mode,	will  still  generate the message
		  {tcp_closed,Socket} when set to {active, once} or {active, true}  mode.  It  is
		  therefore  safe  to assume that the message {tcp_closed,Socket} , possibly fol-
		  lowed by socket port termination (depending on the exit_on_close  option)  will
		  eventually  appear  when a socket changes back and forth between {active, true}
		  and {active, false} mode. However, when peer closing is detected is all  up  to
		  the underlying TCP/IP stack and protocol.

		  Note that {active,true} mode provides no flow control; a fast sender could eas-
		  ily overflow the receiver with incoming messages. Use active mode only if  your
		  high-level  protocol provides its own flow control (for instance, acknowledging
		  received messages) or the amount of data  exchanged  is  small.  {active,false}
		  mode	or  use  of the {active, once} mode provides flow control; the other side
		  will not be able send faster than the receiver can read.

		{broadcast, Boolean} (UDP sockets) :
		  Enable/disable permission to send broadcasts.

		{delay_send, Boolean} :
		  Normally, when an Erlang process sends to a socket,  the  driver  will  try  to
		  immediately  send the data. If that fails, the driver will use any means avail-
		  able to queue up the message to be sent whenever the operating system  says  it
		  can handle it. Setting {delay_send, true} will make all messages queue up. This
		  makes the messages actually sent onto the network  be  larger  but  fewer.  The
		  option actually affects the scheduling of send requests versus Erlang processes
		  instead of changing any real property of the socket. Needless to say it  is  an
		  implementation specific option. Default is false .

		{dontroute, Boolean} :
		  Enable/disable routing bypass for outgoing messages.

		{exit_on_close, Boolean} :
		  By default this option is set to true .

		  The  only  reason to set it to false is if you want to continue sending data to
		  the socket after a close has been detected, for instance if the peer	has  used
		  gen_tcp:shutdown/2 to shutdown the write side.

		{header, Size} :
		  This	option	is  only  meaningful  if the binary option was specified when the
		  socket was created. If the header option is specified, the  first  Size  number
		  bytes of data received from the socket will be elements of a list, and the rest
		  of the data will be a binary given as the tail of the same list. If for example
		  Size == 2 , the data received will match [Byte1,Byte2|Binary] .

		{keepalive, Boolean} (TCP/IP sockets) :
		  Enables/disables  periodic  transmission  on	a connected socket, when no other
		  data is being exchanged. If the other end does not respond, the  connection  is
		  considered broken and an error message will be sent to the controlling process.
		  Default disabled.

		{nodelay, Boolean} (TCP/IP sockets) :
		  If Boolean == true , the TCP_NODELAY option is turned on for the socket,  which
		  means that even small amounts of data will be sent immediately.

		{packet, PacketType} (TCP/IP sockets) :
		  Defines  the	type  of  packets  to  use for a socket. The following values are
		  valid:

		  raw | 0 :
		    No packaging is done.

		  1 | 2 | 4 :
		    Packets consist of a header specifying the number of  bytes  in  the  packet,
		    followed  by  that	number of bytes. The length of header can be one, two, or
		    four bytes; containing an unsigned integer in  big-endian  byte  order.  Each
		    send  operation will generate the header, and the header will be stripped off
		    on each receive operation.

		    In current implementation the 4-byte header is limited to 2Gb.

		  asn1 | cdr | sunrm | fcgi | tpkt | line :
		    These packet types only have effect on receiving. When sending a  packet,  it
		    is	the  responsibility  of  the  application  to supply a correct header. On
		    receiving, however, there will be one message sent to the controlling process
		    for   each	 complete   packet   received,	 and,  similarly,  each  call  to
		    gen_tcp:recv/2,3 returns one complete packet. The header is not stripped off.

		    The meanings of the packet types are as follows:
		    asn1 - ASN.1 BER,
		    sunrm - Sun's RPC encoding,
		    cdr - CORBA (GIOP 1.1),
		    fcgi - Fast CGI,
		    tpkt - TPKT format [RFC1006],
		    line - Line mode, a packet is a line terminated with  newline,  lines  longer
		    than the receive buffer are truncated.

		  http | http_bin :
		    The  Hypertext  Transfer  Protocol.  The packets are returned with the format
		    according to HttpPacket described in erlang:decode_packet/3  .  A  socket  in
		    passive  mode  will return {ok, HttpPacket} from gen_tcp:recv while an active
		    socket will send messages like {http, Socket, HttpPacket} .

		    Note that the packet type httph is not needed when reading from a socket.

		{packet_size, Integer} (TCP/IP sockets) :
		  Sets the max allowed length of the packet body. If the packet header	indicates
		  that the length of the packet is longer than the max allowed length, the packet
		  is considered invalid. The same happens if the packet header is too big for the
		  socket receive buffer.

		{read_packets, Integer} (UDP sockets) :
		  Sets the max number of UDP packets to read without intervention from the socket
		  when data is available. When this many packets have been read and delivered  to
		  the  destination  process, new packets are not read until a new notification of
		  available data has arrived. The default is 5, and if this parameter is set  too
		  high the system can become unresponsive due to UDP packet flooding.

		{recbuf, Integer} :
		  Gives the size of the receive buffer to use for the socket.

		{reuseaddr, Boolean} :
		  Allows  or  disallows  local reuse of port numbers. By default, reuse is disal-
		  lowed.

		{send_timeout, Integer} :
		  Only allowed for connection oriented sockets.

		  Specifies a longest time to wait for a send operation to  be	accepted  by  the
		  underlying  TCP  stack.  When  the  limit  is exceeded, the send operation will
		  return {error,timeout} . How much  of  a  packet  that  actually  got  sent  is
		  unknown,  why  the socket should be closed whenever a timeout has occurred (see
		  send_timeout_close ). Default is infinity .

		{send_timeout_close, Boolean} :
		  Only allowed for connection oriented sockets.

		  Used together with send_timeout to specify whether the socket will be automati-
		  cally  closed when the send operation returns {error,timeout} . The recommended
		  setting is true which will automatically close the socket. Default is false due
		  to backward compatibility.

		{sndbuf, Integer} :
		  Gives the size of the send buffer to use for the socket.

		{priority, Integer} :
		  Sets	the  SO_PRIORITY  socket  level  option on platforms where this is imple-
		  mented. The behaviour and allowed range varies on different systems. The option
		  is ignored on platforms where the option is not implemented. Use with caution.

		{tos, Integer} :
		  Sets IP_TOS IP level options on platforms where this is implemented. The behav-
		  iour and allowed range varies on different systems. The option  is  ignored  on
		  platforms where the option is not implemented. Use with caution.

	      In  addition to the options mentioned above, raw option specifications can be used.
	      The raw options are specified as a tuple of arity four, beginning with the tag  raw
	      ,  followed  by  the  protocol level, the option number and the actual option value
	      specified as a binary. This corresponds to the second, third and fourth argument to
	      the  setsockopt call in the C socket API. The option value needs to be coded in the
	      native endianess of the platform and, if a structure is required, needs  to  follow
	      the struct alignment conventions on the specific platform.

	      Using  raw  socket  options  require detailed knowledge about the current operating
	      system and TCP stack.

	      As an example of the usage of raw options, consider a Linux system where	you  want
	      to  set  the TCP_LINGER2 option on the IPPROTO_TCP protocol level in the stack. You
	      know that on this particular system it defaults to 60 (seconds), but you would like
	      to lower it to 30 for a particular socket. The TCP_LINGER2 option is not explicitly
	      supported by inet, but you know that the protocol level translates to the number 6,
	      the option number to the number 8 and the value is to be given as a 32 bit integer.
	      You can use this line of code to set the option for the socket named Sock :

		      inet:setopts(Sock,[{raw,6,8,<<30:32/native>>}]),

	      As many options are silently discarded by the stack if they are given out of range,
	      it  could  be a good idea to check that a raw option really got accepted. This code
	      places the value in the variable TcpLinger2:

		      {ok,[{raw,6,8,<<TcpLinger2:32/native>>}]}=inet:getopts(Sock,[{raw,6,8,4}]),

	      Code such as the examples above is inherently non portable, even different versions
	      of  the same OS on the same platform may respond differently to this kind of option
	      manipulation. Use with care.

	      Note that the default options for TCP/IP sockets can be  changed	with  the  Kernel
	      configuration parameters mentioned in the beginning of this document.

POSIX ERROR CODES
	 * e2big - argument list too long

	 * eacces - permission denied

	 * eaddrinuse - address already in use

	 * eaddrnotavail - cannot assign requested address

	 * eadv - advertise error

	 * eafnosupport - address family not supported by protocol family

	 * eagain - resource temporarily unavailable

	 * ealign - EALIGN

	 * ealready - operation already in progress

	 * ebade - bad exchange descriptor

	 * ebadf - bad file number

	 * ebadfd - file descriptor in bad state

	 * ebadmsg - not a data message

	 * ebadr - bad request descriptor

	 * ebadrpc - RPC structure is bad

	 * ebadrqc - bad request code

	 * ebadslt - invalid slot

	 * ebfont - bad font file format

	 * ebusy - file busy

	 * echild - no children

	 * echrng - channel number out of range

	 * ecomm - communication error on send

	 * econnaborted - software caused connection abort

	 * econnrefused - connection refused

	 * econnreset - connection reset by peer

	 * edeadlk - resource deadlock avoided

	 * edeadlock - resource deadlock avoided

	 * edestaddrreq - destination address required

	 * edirty - mounting a dirty fs w/o force

	 * edom - math argument out of range

	 * edotdot - cross mount point

	 * edquot - disk quota exceeded

	 * eduppkg - duplicate package name

	 * eexist - file already exists

	 * efault - bad address in system call argument

	 * efbig - file too large

	 * ehostdown - host is down

	 * ehostunreach - host is unreachable

	 * eidrm - identifier removed

	 * einit - initialization error

	 * einprogress - operation now in progress

	 * eintr - interrupted system call

	 * einval - invalid argument

	 * eio - I/O error

	 * eisconn - socket is already connected

	 * eisdir - illegal operation on a directory

	 * eisnam - is a named file

	 * el2hlt - level 2 halted

	 * el2nsync - level 2 not synchronized

	 * el3hlt - level 3 halted

	 * el3rst - level 3 reset

	 * elbin - ELBIN

	 * elibacc - cannot access a needed shared library

	 * elibbad - accessing a corrupted shared library

	 * elibexec - cannot exec a shared library directly

	 * elibmax - attempting to link in more shared libraries than system limit

	 * elibscn - .lib section in a.out corrupted

	 * elnrng - link number out of range

	 * eloop - too many levels of symbolic links

	 * emfile - too many open files

	 * emlink - too many links

	 * emsgsize - message too long

	 * emultihop - multihop attempted

	 * enametoolong - file name too long

	 * enavail - not available

	 * enet - ENET

	 * enetdown - network is down

	 * enetreset - network dropped connection on reset

	 * enetunreach - network is unreachable

	 * enfile - file table overflow

	 * enoano - anode table overflow

	 * enobufs - no buffer space available

	 * enocsi - no CSI structure available

	 * enodata - no data available

	 * enodev - no such device

	 * enoent - no such file or directory

	 * enoexec - exec format error

	 * enolck - no locks available

	 * enolink - link has be severed

	 * enomem - not enough memory

	 * enomsg - no message of desired type

	 * enonet - machine is not on the network

	 * enopkg - package not installed

	 * enoprotoopt - bad protocol option

	 * enospc - no space left on device

	 * enosr - out of stream resources or not a stream device

	 * enosym - unresolved symbol name

	 * enosys - function not implemented

	 * enotblk - block device required

	 * enotconn - socket is not connected

	 * enotdir - not a directory

	 * enotempty - directory not empty

	 * enotnam - not a named file

	 * enotsock - socket operation on non-socket

	 * enotsup - operation not supported

	 * enotty - inappropriate device for ioctl

	 * enotuniq - name not unique on network

	 * enxio - no such device or address

	 * eopnotsupp - operation not supported on socket

	 * eperm - not owner

	 * epfnosupport - protocol family not supported

	 * epipe - broken pipe

	 * eproclim - too many processes

	 * eprocunavail - bad procedure for program

	 * eprogmismatch - program version wrong

	 * eprogunavail - RPC program not available

	 * eproto - protocol error

	 * eprotonosupport - protocol not supported

	 * eprototype - protocol wrong type for socket

	 * erange - math result unrepresentable

	 * erefused - EREFUSED

	 * eremchg - remote address changed

	 * eremdev - remote device

	 * eremote - pathname hit remote file system

	 * eremoteio - remote i/o error

	 * eremoterelease - EREMOTERELEASE

	 * erofs - read-only file system

	 * erpcmismatch - RPC version is wrong

	 * erremote - object is remote

	 * eshutdown - cannot send after socket shutdown

	 * esocktnosupport - socket type not supported

	 * espipe - invalid seek

	 * esrch - no such process

	 * esrmnt - srmount error

	 * estale - stale remote file handle

	 * esuccess - Error 0

	 * etime - timer expired

	 * etimedout - connection timed out

	 * etoomanyrefs - too many references

	 * etxtbsy - text file or pseudo-device busy

	 * euclean - structure needs cleaning

	 * eunatch - protocol driver not attached

	 * eusers - too many users

	 * eversion - version mismatch

	 * ewouldblock - operation would block

	 * exdev - cross-domain link

	 * exfull - message tables full

	 * nxdomain - the hostname or domain name could not be found

Ericsson AB				  kernel 2.14.3 			       inet(3erl)
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