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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2021. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(inet_tcp).
%% Socket server for TCP/IP
-export([connect/3, connect/4, listen/2, accept/1, accept/2, close/1]).
-export([send/2, send/3, recv/2, recv/3, unrecv/2]).
-export([shutdown/2]).
-export([controlling_process/2]).
-export([fdopen/2]).
-export([family/0, mask/2, parse_address/1]). % inet_tcp_dist
-export([getserv/1, getaddr/1, getaddr/2, getaddrs/1, getaddrs/2]).
-export([translate_ip/1]).
-include("inet_int.hrl").
-define(FAMILY, inet).
-define(PROTO, tcp).
-define(TYPE, stream).
%% my address family
family() -> ?FAMILY.
%% Apply netmask on address
mask({M1,M2,M3,M4}, {IP1,IP2,IP3,IP4}) ->
{M1 band IP1,
M2 band IP2,
M3 band IP3,
M4 band IP4}.
%% Parse address string
parse_address(Host) ->
inet_parse:ipv4strict_address(Host).
%% inet_tcp port lookup
getserv(Port) when is_integer(Port) -> {ok, Port};
getserv(Name) when is_atom(Name) -> inet:getservbyname(Name, ?PROTO).
%% inet_tcp address lookup
getaddr(Address) -> inet:getaddr(Address, ?FAMILY).
getaddr(Address, Timer) -> inet:getaddr_tm(Address, ?FAMILY, Timer).
%% inet_tcp address lookup
getaddrs(Address) -> inet:getaddrs(Address, ?FAMILY).
getaddrs(Address, Timer) -> inet:getaddrs_tm(Address, ?FAMILY, Timer).
%% inet_udp special this side addresses
translate_ip(IP) -> inet:translate_ip(IP, ?FAMILY).
%%
%% Send data on a socket
%%
send(Socket, Packet, Opts) -> prim_inet:send(Socket, Packet, Opts).
send(Socket, Packet) -> prim_inet:send(Socket, Packet, []).
%%
%% Receive data from a socket (inactive only)
%%
recv(Socket, Length) -> prim_inet:recv(Socket, Length).
recv(Socket, Length, Timeout) -> prim_inet:recv(Socket, Length, Timeout).
unrecv(Socket, Data) -> prim_inet:unrecv(Socket, Data).
%%
%% Shutdown one end of a socket
%%
shutdown(Socket, How) ->
prim_inet:shutdown(Socket, How).
%%
%% Close a socket (async)
%%
close(Socket) ->
inet:tcp_close(Socket).
%%
%% Set controlling process
%%
controlling_process(Socket, NewOwner) ->
inet:tcp_controlling_process(Socket, NewOwner).
%%
%% Connect
%%
connect(Address, Port, Opts) ->
do_connect(Address, Port, Opts, infinity).
connect(Address, Port, Opts, infinity) ->
do_connect(Address, Port, Opts, infinity);
connect(Address, Port, Opts, Timeout)
when is_integer(Timeout), Timeout >= 0 ->
do_connect(Address, Port, Opts, Timeout).
do_connect(Addr = {A,B,C,D}, Port, Opts, Time)
when ?ip(A,B,C,D), ?port(Port) ->
case inet:connect_options(Opts, ?MODULE) of
{error, Reason} -> exit(Reason);
{ok,
#connect_opts{
fd = Fd,
ifaddr = BAddr,
port = BPort,
opts = SockOpts}}
when ?ip(BAddr), ?port(BPort);
BAddr =:= undefined ->
case
inet:open(
Fd, BAddr, BPort, SockOpts,
?PROTO, ?FAMILY, ?TYPE, ?MODULE)
of
{ok, S} ->
case prim_inet:connect(S, Addr, Port, Time) of
ok -> {ok,S};
Error -> prim_inet:close(S), Error
end;
Error -> Error
end;
{ok, _} -> exit(badarg)
end.
%%
%% Listen
%%
listen(Port, Opts) ->
case inet:listen_options([{port,Port} | Opts], ?MODULE) of
{error, Reason} -> exit(Reason);
{ok,
#listen_opts{
fd = Fd,
ifaddr = BAddr,
port = BPort,
opts = SockOpts} = R}
when ?ip(BAddr), ?port(BPort);
BAddr =:= undefined ->
case
inet:open_bind(
Fd, BAddr, BPort, SockOpts,
?PROTO, ?FAMILY, ?TYPE, ?MODULE)
of
{ok, S} ->
case prim_inet:listen(S, R#listen_opts.backlog) of
ok -> {ok, S};
Error -> prim_inet:close(S), Error
end;
Error -> Error
end;
{ok, _} -> exit(badarg)
end.
%%
%% Accept
%%
accept(L) ->
case prim_inet:accept(L, accept_family_opts()) of
{ok, S} ->
inet_db:register_socket(S, ?MODULE),
{ok,S};
Error -> Error
end.
accept(L, Timeout) ->
case prim_inet:accept(L, Timeout, accept_family_opts()) of
{ok, S} ->
inet_db:register_socket(S, ?MODULE),
{ok,S};
Error -> Error
end.
accept_family_opts() -> [tos, ttl, recvtos, recvttl].
%%
%% Create a port/socket from a file descriptor
%%
fdopen(Fd, Opts) ->
inet:fdopen(Fd, Opts, ?PROTO, ?FAMILY, ?TYPE, ?MODULE).