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%% ``The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved via the world wide web at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
%% AB. All Rights Reserved.''
%%
%% $Id$
%
-module(http_transport).
% Internal application API
-export([start/1, connect/3, connect/4, listen/2, listen/3,
accept/2, accept/3, close/2,
send/3, controlling_process/3, setopts/3,
peername/2, resolve/0]).
%%%=========================================================================
%%% Internal application API
%%%=========================================================================
%%-------------------------------------------------------------------------
%% start(SocketType) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, _}
%%
%% Description: Makes sure inet_db or ssl is started.
%%-------------------------------------------------------------------------
start(ip_comm) ->
case inet_db:start() of
{ok, _} ->
ok;
{error, {already_started, _}} ->
ok;
Error ->
Error
end;
start({ssl, _}) ->
case ssl:start() of
ok ->
ok;
{ok, _} ->
ok;
{error, {already_started,_}} ->
ok;
Error ->
Error
end.
%%-------------------------------------------------------------------------
%% connect(SocketType, Address, IPV6, Timeout) ->
%% {ok, Socket} | {error, Reason}
%% SocketType = ip_comm | {ssl, SslConfig}
%% Address = {Host, Port}
%% IPV6 = disabled | enabled
%% Socket = socket()
%%
%% Description: Connects to the Host and Port specified in HTTPRequest.
%% uses ipv6 if possible.
%%-------------------------------------------------------------------------
connect(SocketType, Address, IPV6) ->
connect(SocketType, Address, IPV6, infinity).
connect(ip_comm, {Host, Port}, enabled, Timeout) ->
{Opts, NewHost} =
case inet:getaddr(Host, inet6) of
{ok, IPAddr = {0, 0, 0, 0, 0, 16#ffff, _, _}} ->
case inet:getaddr(Host, inet) of
{ok,NewIP} ->
{[binary, {packet, 0}, {active, false},
{reuseaddr,true}], NewIP};
_Error ->
{[binary, {packet, 0}, {active, false},
{reuseaddr,true}, inet6], IPAddr}
end;
{ok, IPAddr} ->
{[binary, {packet, 0}, {active, false},
{reuseaddr,true}, inet6], IPAddr};
_ ->
{[binary, {packet, 0}, {active, false},
{reuseaddr,true}], Host}
end,
gen_tcp:connect(NewHost, Port, Opts, Timeout);
connect(ip_comm, {Host, Port}, disabled, Timeout) ->
Opts = [binary, {packet, 0}, {active, false}, {reuseaddr,true}],
gen_tcp:connect(Host, Port, Opts, Timeout);
connect({ssl, SslConfig}, {Host, Port}, _, Timeout) ->
Opts = [binary, {active, false}] ++ SslConfig,
ssl:connect(Host, Port, Opts, Timeout).
%%-------------------------------------------------------------------------
%% listen(SocketType, Port) -> {ok, Socket} | {error, Reason}
%% SocketType = ip_comm | {ssl, SSLConfig}
%% Port = integer()
%% Socket = socket()
%%
%% Description: Sets up socket to listen on the port Port on the local
%% host using either gen_tcp or ssl. In the gen_tcp case the port
%% might allready have been initiated by a wrapper-program and is
%% given as an Fd that can be retrieved by init:get_argument. The
%% reason for this to enable a HTTP-server not runnig as root to use
%% port 80.
%%-------------------------------------------------------------------------
listen(SocketType, Port) ->
listen(SocketType, undefined, Port).
listen(ip_comm, Addr, Port) ->
FdName = list_to_atom("httpd_" ++ integer_to_list(Port)),
{NewPort, Opt} =
case init:get_argument(FdName) of
{ok, [[FdStr]]} ->
Fd = list_to_integer(FdStr),
{0,
sock_opt(ip_comm, Addr, [{backlog, 128},
{reuseaddr,true}, {fd,Fd}, {nodelay, true}])};
error ->
{Port,
sock_opt(ip_comm, Addr,
[{backlog, 128}, {reuseaddr, true}, {nodelay, true}])}
end,
gen_tcp:listen(NewPort, Opt);
listen({ssl, SSLConfig} = Ssl, Addr, Port) ->
Opt = sock_opt(Ssl, Addr, SSLConfig),
ssl:listen(Port, Opt).
%%-------------------------------------------------------------------------
%% accept(SocketType, ListenSocket) -> {ok, Socket} | {error, Reason}
%% accept(SocketType, ListenSocket, Timeout) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, SSLConfig}
%% ListenSocket = socket()
%% Timeout = infinity | integer() >= 0
%% Socket = socket()
%%
%% Description: Accepts an incoming connection request on a listen socket,
%% using either gen_tcp or ssl.
%%-------------------------------------------------------------------------
accept(SocketType, ListenSocket) ->
accept(SocketType, ListenSocket, infinity).
accept(ip_comm, ListenSocket, Timeout) ->
gen_tcp:accept(ListenSocket, Timeout);
accept({ssl,_SSLConfig}, ListenSocket, Timeout) ->
ssl:accept(ListenSocket, Timeout).
%%-------------------------------------------------------------------------
%% controlling_process(SocketType, Socket, NewOwner) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, _}
%% Socket = socket()
%% NewOwner = pid()
%%
%% Description: Assigns a new controlling process to Socket.
%%-------------------------------------------------------------------------
controlling_process(ip_comm, Socket, NewOwner) ->
gen_tcp:controlling_process(Socket, NewOwner);
controlling_process({ssl, _}, Socket, NewOwner) ->
ssl:controlling_process(Socket, NewOwner).
%%-------------------------------------------------------------------------
%% setopts(SocketType, Socket, Options) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, _}
%% Socket = socket()
%% Options = list()
%% Description: Sets one or more options for a socket, using either
%% gen_tcp or ssl.
%%-------------------------------------------------------------------------
setopts(ip_comm, Socket, Options) ->
inet:setopts(Socket,Options);
setopts({ssl, _}, Socket, Options) ->
ssl:setopts(Socket, Options).
%%-------------------------------------------------------------------------
%% send(RequestOrSocketType, Socket, Message) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, _}
%% Socket = socket()
%% Message = list() | binary()
%% Description: Sends a packet on a socket, using either gen_tcp or ssl.
%%-------------------------------------------------------------------------
send(ip_comm, Socket, Message) ->
gen_tcp:send(Socket, Message);
send({ssl, _}, Socket, Message) ->
ssl:send(Socket, Message).
%%-------------------------------------------------------------------------
%% close(SocketType, Socket) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, _}
%% Socket = socket()
%%
%% Description: Closes a socket, using either gen_tcp or ssl.
%%-------------------------------------------------------------------------
close(ip_comm, Socket) ->
gen_tcp:close(Socket);
close({ssl, _}, Socket) ->
ssl:close(Socket).
%%-------------------------------------------------------------------------
%% peername(SocketType, Socket) -> ok | {error, Reason}
%% SocketType = ip_comm | {ssl, _}
%% Socket = socket()
%%
%% Description: Returns the address and port for the other end of a
%% connection, usning either gen_tcp or ssl.
%%-------------------------------------------------------------------------
peername(ip_comm, Socket) ->
case inet:peername(Socket) of
{ok,{{A, B, C, D}, Port}} ->
PeerName = integer_to_list(A)++"."++integer_to_list(B)++"."++
integer_to_list(C)++"."++integer_to_list(D),
{Port, PeerName};
{ok,{{A, B, C, D, E, F, G, H}, Port}} ->
PeerName = http_util:integer_to_hexlist(A) ++ ":"++
http_util:integer_to_hexlist(B) ++ ":" ++
http_util:integer_to_hexlist(C) ++ ":" ++
http_util:integer_to_hexlist(D) ++ ":" ++
http_util:integer_to_hexlist(E) ++ ":" ++
http_util:integer_to_hexlist(F) ++ ":" ++
http_util:integer_to_hexlist(G) ++":"++
http_util:integer_to_hexlist(H),
{Port, PeerName};
{error, _} ->
{-1, "unknown"}
end;
peername({ssl, _}, Socket) ->
case ssl:peername(Socket) of
{ok,{{A, B, C, D}, Port}} ->
PeerName = integer_to_list(A)++"."++integer_to_list(B)++"."++
integer_to_list(C)++"."++integer_to_list(D),
{Port, PeerName};
{error, _} ->
{-1, "unknown"}
end.
%%-------------------------------------------------------------------------
%% resolve() -> HostName
%% HostName = string()
%%
%% Description: Returns the local hostname.
%%-------------------------------------------------------------------------
resolve() ->
{ok, Name} = inet:gethostname(),
Name.
%%%========================================================================
%%% Internal functions
%%%========================================================================
%% Address any comes from directive: BindAddress "*"
sock_opt(ip_comm, any = Addr, Opt) ->
sock_opt1([{ip, Addr} | Opt]);
sock_opt(ip_comm, undefined, Opt) ->
sock_opt1(Opt);
sock_opt(_, any = Addr, Opt) ->
sock_opt2([{ip, Addr} | Opt]);
sock_opt(_, undefined, Opt) ->
sock_opt2(Opt);
sock_opt(_, Addr, Opt) when size(Addr) == 4 ->
sock_opt2([{ip, Addr} | Opt]);
sock_opt(ip_comm, Addr, Opt) ->
sock_opt2([inet6, {ip, Addr} | Opt]);
sock_opt(_, Addr, Opt) ->
sock_opt2([{ip, Addr} | Opt]).
sock_opt1(Opt) ->
case has_inet6_supported() of
yes ->
sock_opt2([inet6 | Opt]);
no ->
sock_opt2(Opt)
end.
sock_opt2(Opt) ->
[{packet, 0}, {active, false} | Opt].
has_inet6_supported() ->
case (catch inet:getaddr("localhost", inet6)) of
{ok, {0, 0, 0, 0, 0, 16#ffff, _, _}} ->
no;
{ok,_} -> yes;
_ ->
no
end.
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