1%% 2%% %CopyrightBegin% 3%% 4%% Copyright Ericsson AB 1997-2018. All Rights Reserved. 5%% 6%% Licensed under the Apache License, Version 2.0 (the "License"); 7%% you may not use this file except in compliance with the License. 8%% You may obtain a copy of the License at 9%% 10%% http://www.apache.org/licenses/LICENSE-2.0 11%% 12%% Unless required by applicable law or agreed to in writing, software 13%% distributed under the License is distributed on an "AS IS" BASIS, 14%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15%% See the License for the specific language governing permissions and 16%% limitations under the License. 17%% 18%% %CopyrightEnd% 19%% 20-module(inet_tcp). 21 22%% Socket server for TCP/IP 23 24-export([connect/3, connect/4, listen/2, accept/1, accept/2, close/1]). 25-export([send/2, send/3, recv/2, recv/3, unrecv/2]). 26-export([shutdown/2]). 27-export([controlling_process/2]). 28-export([fdopen/2]). 29 30-export([family/0, mask/2, parse_address/1]). % inet_tcp_dist 31-export([getserv/1, getaddr/1, getaddr/2, getaddrs/1, getaddrs/2]). 32-export([translate_ip/1]). 33 34-include("inet_int.hrl"). 35 36-define(FAMILY, inet). 37-define(PROTO, tcp). 38-define(TYPE, stream). 39 40%% my address family 41family() -> ?FAMILY. 42 43%% Apply netmask on address 44mask({M1,M2,M3,M4}, {IP1,IP2,IP3,IP4}) -> 45 {M1 band IP1, 46 M2 band IP2, 47 M3 band IP3, 48 M4 band IP4}. 49 50%% Parse address string 51parse_address(Host) -> 52 inet_parse:ipv4strict_address(Host). 53 54%% inet_tcp port lookup 55getserv(Port) when is_integer(Port) -> {ok, Port}; 56getserv(Name) when is_atom(Name) -> inet:getservbyname(Name, ?PROTO). 57 58%% inet_tcp address lookup 59getaddr(Address) -> inet:getaddr(Address, ?FAMILY). 60getaddr(Address, Timer) -> inet:getaddr_tm(Address, ?FAMILY, Timer). 61 62%% inet_tcp address lookup 63getaddrs(Address) -> inet:getaddrs(Address, ?FAMILY). 64getaddrs(Address, Timer) -> inet:getaddrs_tm(Address, ?FAMILY, Timer). 65 66%% inet_udp special this side addresses 67translate_ip(IP) -> inet:translate_ip(IP, ?FAMILY). 68 69%% 70%% Send data on a socket 71%% 72send(Socket, Packet, Opts) -> prim_inet:send(Socket, Packet, Opts). 73send(Socket, Packet) -> prim_inet:send(Socket, Packet, []). 74 75%% 76%% Receive data from a socket (inactive only) 77%% 78recv(Socket, Length) -> prim_inet:recv(Socket, Length). 79recv(Socket, Length, Timeout) -> prim_inet:recv(Socket, Length, Timeout). 80 81unrecv(Socket, Data) -> prim_inet:unrecv(Socket, Data). 82 83%% 84%% Shutdown one end of a socket 85%% 86shutdown(Socket, How) -> 87 prim_inet:shutdown(Socket, How). 88 89%% 90%% Close a socket (async) 91%% 92close(Socket) -> 93 inet:tcp_close(Socket). 94 95%% 96%% Set controlling process 97%% 98controlling_process(Socket, NewOwner) -> 99 inet:tcp_controlling_process(Socket, NewOwner). 100 101%% 102%% Connect 103%% 104connect(Address, Port, Opts) -> 105 do_connect(Address, Port, Opts, infinity). 106 107connect(Address, Port, Opts, infinity) -> 108 do_connect(Address, Port, Opts, infinity); 109connect(Address, Port, Opts, Timeout) 110 when is_integer(Timeout), Timeout >= 0 -> 111 do_connect(Address, Port, Opts, Timeout). 112 113do_connect(Addr = {A,B,C,D}, Port, Opts, Time) 114 when ?ip(A,B,C,D), ?port(Port) -> 115 case inet:connect_options(Opts, ?MODULE) of 116 {error, Reason} -> exit(Reason); 117 {ok, 118 #connect_opts{ 119 fd = Fd, 120 ifaddr = BAddr = {Ab,Bb,Cb,Db}, 121 port = BPort, 122 opts = SockOpts}} 123 when ?ip(Ab,Bb,Cb,Db), ?port(BPort) -> 124 case inet:open( 125 Fd, BAddr, BPort, SockOpts, 126 ?PROTO, ?FAMILY, ?TYPE, ?MODULE) of 127 {ok, S} -> 128 case prim_inet:connect(S, Addr, Port, Time) of 129 ok -> {ok,S}; 130 Error -> prim_inet:close(S), Error 131 end; 132 Error -> Error 133 end; 134 {ok, _} -> exit(badarg) 135 end. 136 137%% 138%% Listen 139%% 140listen(Port, Opts) -> 141 case inet:listen_options([{port,Port} | Opts], ?MODULE) of 142 {error, Reason} -> exit(Reason); 143 {ok, 144 #listen_opts{ 145 fd = Fd, 146 ifaddr = BAddr = {A,B,C,D}, 147 port = BPort, 148 opts = SockOpts} = R} 149 when ?ip(A,B,C,D), ?port(BPort) -> 150 case inet:open( 151 Fd, BAddr, BPort, SockOpts, 152 ?PROTO, ?FAMILY, ?TYPE, ?MODULE) of 153 {ok, S} -> 154 case prim_inet:listen(S, R#listen_opts.backlog) of 155 ok -> {ok, S}; 156 Error -> prim_inet:close(S), Error 157 end; 158 Error -> Error 159 end; 160 {ok, _} -> exit(badarg) 161 end. 162 163%% 164%% Accept 165%% 166accept(L) -> 167 case prim_inet:accept(L, accept_family_opts()) of 168 {ok, S} -> 169 inet_db:register_socket(S, ?MODULE), 170 {ok,S}; 171 Error -> Error 172 end. 173 174accept(L, Timeout) -> 175 case prim_inet:accept(L, Timeout, accept_family_opts()) of 176 {ok, S} -> 177 inet_db:register_socket(S, ?MODULE), 178 {ok,S}; 179 Error -> Error 180 end. 181 182accept_family_opts() -> [tos, ttl, recvtos, recvttl]. 183 184%% 185%% Create a port/socket from a file descriptor 186%% 187fdopen(Fd, Opts) -> 188 inet:fdopen(Fd, Opts, ?PROTO, ?FAMILY, ?TYPE, ?MODULE). 189