Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 1 | % ip.access IPA multiplex protocol |
| 2 | |
Harald Welte | d0f391e | 2019-08-11 20:00:17 +0200 | [diff] [blame] | 3 | % (C) 2010,2012,2019 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 4 | % (C) 2010 by On-Waves |
| 5 | % |
| 6 | % All Rights Reserved |
| 7 | % |
| 8 | % This program is free software; you can redistribute it and/or modify |
| 9 | % it under the terms of the GNU General Public License as published by |
| 10 | % the Free Software Foundation; either version 2 of the License, or |
| 11 | % (at your option) any later version. |
| 12 | % |
| 13 | % This program is distributed in the hope that it will be useful, |
| 14 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | % GNU General Public License for more details. |
| 17 | % |
| 18 | % You should have received a copy of the GNU General Public License along |
| 19 | % with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | % 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | |
| 22 | -module(ipa_proto). |
| 23 | -author('Harald Welte <laforge@gnumonks.org>'). |
| 24 | -compile(export_all). |
| 25 | |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 26 | -include("ipa.hrl"). |
| 27 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 28 | -define(TIMEOUT, 1000). |
| 29 | -define(IPA_SOCKOPTS, [binary, {packet, 0}, {reuseaddr, true}, {active, false}]). |
| 30 | |
| 31 | -define(IPAC_MSGT_PING, 0). |
| 32 | -define(IPAC_MSGT_PONG, 1). |
| 33 | -define(IPAC_MSGT_ID_GET, 4). |
| 34 | -define(IPAC_MSGT_ID_RESP, 5). |
| 35 | -define(IPAC_MSGT_ID_ACK, 6). |
| 36 | |
Harald Welte | d0f391e | 2019-08-11 20:00:17 +0200 | [diff] [blame] | 37 | -define(IPAC_PROTO_OSMO, 238). |
| 38 | -define(IPAC_PROTO_CCM, 254). |
| 39 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 40 | -export([register_socket/1, register_stream/3, unregister_stream/2, |
| 41 | send/3, connect/3, connect/4, listen_accept_handle/2, |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 42 | start_listen/3, controlling_process/3, register_codec/3]). |
| 43 | |
| 44 | -type stream_id() :: integer() | {osmo, integer()}. |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 45 | |
| 46 | -record(ipa_socket, {socket, ipaPid, streamTbl, listenType}). |
| 47 | |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 48 | -record(ipa_codec, {streamId :: stream_id(), |
| 49 | encodeFn :: fun(), |
| 50 | decodeFn :: fun() |
| 51 | }). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 52 | |
| 53 | % register a TCP socket with this IPA protocol implementation |
| 54 | register_socket(Socket) -> |
| 55 | IpaPid = spawn(?MODULE, init_sock, [Socket, self()]), |
| 56 | % synchronously wait for init_sock to be done |
| 57 | receive |
| 58 | {ipa_init_sock_done, Socket} -> |
| 59 | % assign ownership of the socket to the new IPA handler process |
| 60 | gen_tcp:controlling_process(Socket, IpaPid), |
| 61 | {ok, IpaPid} |
| 62 | after |
| 63 | ?TIMEOUT -> |
| 64 | {error, timeout} |
| 65 | end. |
| 66 | |
| 67 | % call_sync() preceeded by a Socket -> Pid lookup |
| 68 | call_sync_sock(Socket, Request) -> |
| 69 | % resolve PID responsible for this socket |
| 70 | case ets:lookup(ipa_sockets, Socket) of |
| 71 | [IpaSock] -> |
| 72 | call_sync(IpaSock#ipa_socket.ipaPid, Request); |
| 73 | _ -> |
| 74 | io:format("No Process for Socket ~p~n", [Socket]), |
| 75 | {error, no_sock_for_pid} |
| 76 | end. |
| 77 | |
| 78 | % a user process wants to register itself for a given Socket/StreamID tuple |
| 79 | register_stream(Socket, StreamID, Pid) -> |
| 80 | call_sync_sock(Socket, {ipa_reg_stream, Socket, StreamID, Pid}). |
| 81 | |
| 82 | register_streams(_S, []) -> |
| 83 | ok; |
| 84 | register_streams(S, [{StreamID, Pid}|SList]) -> |
| 85 | ipa_proto:register_stream(S, StreamID, Pid), |
| 86 | register_streams(S, SList). |
| 87 | |
| 88 | % unregister for a given stream |
| 89 | unregister_stream(Socket, StreamID) -> |
| 90 | call_sync_sock(Socket, {ipa_unreg_stream, Socket, StreamID}). |
| 91 | |
| 92 | % change the controlling process for a given {Socket, StreamID} |
| 93 | controlling_process(Socket, StreamID, NewPid) -> |
| 94 | call_sync_sock(Socket, {ipa_ctrl_proc, Socket, StreamID, NewPid}). |
| 95 | |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 96 | % Set the metadata required for the ipa CCM sub-protocol. |
| 97 | set_ccm_options(Socket, CcmOptions) -> |
| 98 | call_sync_sock(Socket, {ipa_set_ccm_options, Socket, CcmOptions}). |
| 99 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 100 | % unblock the socket from further processing |
| 101 | unblock(Socket) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 102 | call_sync_sock(Socket, {ipa_unblock, Socket}). |
| 103 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 104 | % server-side handler for unregister_stream() |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 105 | request({ipa_reg_stream, Socket, StreamID, Pid}, _) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 106 | io:format("Registering handler ~p for socket ~p Stream ~p~n", [Pid, Socket, StreamID]), |
| 107 | [IpaSock] = ets:lookup(ipa_sockets, Socket), |
| 108 | ets:insert_new(IpaSock#ipa_socket.streamTbl, {{Socket, StreamID}, Pid}); |
| 109 | % server-side handler for unregister_stream() |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 110 | request({ipa_unreg_stream, Socket, StreamID}, _) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 111 | io:format("Unregistering handler for Socket ~p Stream ~p~n", [Socket, StreamID]), |
| 112 | [IpaSock] = ets:lookup(ipa_sockets, Socket), |
| 113 | ets:delete(IpaSock#ipa_socket.streamTbl, {Socket, StreamID}); |
| 114 | % server-side handler for controlling_process() |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 115 | request({ipa_ctrl_proc, Socket, StreamID, NewPid}, _) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 116 | io:format("Changing handler for socket ~p Stream ~p~n", [Socket, StreamID]), |
| 117 | [IpaSock] = ets:lookup(ipa_sockets, Socket), |
| 118 | ets:delete(IpaSock#ipa_socket.streamTbl, {Socket, StreamID}), |
| 119 | ets:insert_new(IpaSock#ipa_socket.streamTbl, {{Socket, StreamID}, NewPid}); |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 120 | % server-side handler for set_ccm_options() |
| 121 | % set ccm protocol metadata options reported with connection setup. |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 122 | request({ipa_set_ccm_options, Socket, CcmOptions}, _) -> |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 123 | io:format("Setting ccm options for socket ~p to ~p~n", [Socket, CcmOptions]), |
| 124 | {ccm_options, CcmOptions}; |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 125 | % server-side handler for unblock() |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 126 | request({ipa_unblock, Socket}, CcmOptions) -> |
| 127 | if |
| 128 | CcmOptions#ipa_ccm_options.initiate_ack -> send_ccm_id_ack(Socket); |
| 129 | true -> send_ccm_id_get(Socket) |
| 130 | end, |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 131 | io:format("Unblocking socket ~p~n", [Socket]), |
| 132 | %[IpaSock] = ets:lookup(ipa_sockets, Socket), |
| 133 | Ret = inet:setopts(Socket, [{active, once}]), |
| 134 | io:format("Unblocking socket ~p:~p~n", [Socket, Ret]). |
| 135 | |
| 136 | % split an incoming IPA message and split it into Length/StreamID/Payload |
| 137 | split_ipa_msg(DataBin) -> |
| 138 | % FIXME: This will throw an exception if DataBin doesn't contain all payload |
| 139 | <<Length:16/big-unsigned-integer, StreamID:8, Payload:Length/binary, Trailer/binary>> = DataBin, |
| 140 | io:format("Stream ~p, ~p bytes~n", [StreamID, Length]), |
| 141 | {StreamID, Payload, Trailer}. |
| 142 | |
| 143 | % deliver an incoming message to the process that is registered for the socket/stream_id |
| 144 | deliver_rx_ipa_msg(Socket, StreamID, StreamMap, DataBin) -> |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 145 | DataDec = try_decode(StreamID, DataBin), |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 146 | case ets:lookup(StreamMap, {Socket, StreamID}) of |
| 147 | [{_,{process_id, Pid}}] -> |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 148 | Pid ! {ipa, Socket, StreamID, DataDec}; |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 149 | [{_,{callback_fn, Fn, Args}}] -> |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 150 | Fn(Socket, StreamID, DataDec, Args); |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 151 | [] -> |
| 152 | io:format("No Pid registered for Socket ~p Stream ~p~n", [Socket, StreamID]) |
| 153 | end. |
| 154 | |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 155 | % register a Codec with this IPA protocol implementation |
| 156 | -spec register_codec(stream_id(), fun(), fun()) -> boolean(). |
| 157 | register_codec(StreamID, EncodeFn, DecodeFn) -> |
| 158 | ets:insert(ipa_codecs, #ipa_codec{streamId=StreamID, encodeFn=EncodeFn, decodeFn=DecodeFn}). |
| 159 | |
| 160 | -spec try_decode(stream_id(), binary()) -> any(). |
| 161 | try_decode(StreamID, Data) -> |
| 162 | case ets:lookup(ipa_codecs, StreamID) of |
| 163 | [IpaCodec] -> |
| 164 | Fun = IpaCodec#ipa_codec.decodeFn, |
| 165 | Fun(Data); |
| 166 | [] -> |
| 167 | Data |
| 168 | end. |
| 169 | |
| 170 | -spec try_encode(stream_id(), any()) -> binary(). |
| 171 | try_encode(_StreamID, Data) when is_binary(Data) -> |
| 172 | Data; |
| 173 | try_encode(StreamID, Data) -> |
| 174 | case ets:lookup(ipa_codecs, StreamID) of |
| 175 | [IpaCodec] -> |
| 176 | Fun = IpaCodec#ipa_codec.encodeFn, |
| 177 | Fun(Data); |
| 178 | [] -> |
| 179 | Data |
| 180 | end. |
| 181 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 182 | % process (split + deliver) an incoming IPA message |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 183 | process_rx_ipa_msg(_S, _StreamMap, _, <<>>) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 184 | ok; |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 185 | process_rx_ipa_msg(S, StreamMap, CcmOptions, Data) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 186 | {StreamID, PayloadBin, Trailer} = split_ipa_msg(Data), |
| 187 | case StreamID of |
Harald Welte | d0f391e | 2019-08-11 20:00:17 +0200 | [diff] [blame] | 188 | ?IPAC_PROTO_CCM -> |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 189 | process_rx_ccm_msg(S, StreamID, CcmOptions, PayloadBin); |
Harald Welte | d0f391e | 2019-08-11 20:00:17 +0200 | [diff] [blame] | 190 | ?IPAC_PROTO_OSMO -> |
| 191 | <<ExtStreamID:8, PayloadExt/binary>> = PayloadBin, |
| 192 | deliver_rx_ipa_msg(S, {osmo, ExtStreamID}, StreamMap, PayloadExt); |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 193 | _ -> |
| 194 | deliver_rx_ipa_msg(S, StreamID, StreamMap, PayloadBin) |
| 195 | end, |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 196 | process_rx_ipa_msg(S, StreamMap, CcmOptions, Trailer). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 197 | |
| 198 | send_close_signal([]) -> |
| 199 | ok; |
| 200 | send_close_signal([StreamSpec|Tail]) -> |
Harald Welte | f66bbfa | 2012-01-28 14:08:52 +0100 | [diff] [blame] | 201 | io:format("send_close_signal ~p ~p~n", [StreamSpec, Tail]), |
| 202 | case StreamSpec of |
| 203 | [{{Socket, StreamID}, {process_id, Pid}}] -> |
| 204 | Pid ! {ipa_closed, {Socket, StreamID}}; |
| 205 | [{{Socket, StreamID}, {callback_fn, Fn, Args}}] -> |
| 206 | Fn(Socket, StreamID, ipa_closed, Args) |
| 207 | end, |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 208 | send_close_signal(Tail). |
Harald Welte | f66bbfa | 2012-01-28 14:08:52 +0100 | [diff] [blame] | 209 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 210 | process_tcp_closed(S, StreamMap) -> |
| 211 | % signal the closed socket to the user |
| 212 | StreamList = ets:match(StreamMap, '$1'), |
| 213 | send_close_signal(StreamList), |
| 214 | % remove the stream map for this socket |
| 215 | ets:delete(StreamMap), |
| 216 | % remove any entry regarding 'S' from ipa_sockets |
| 217 | ets:delete(ipa_sockets, S), |
| 218 | ok. |
| 219 | |
| 220 | % send a binary message through a given Socket / StreamID |
Harald Welte | d0f391e | 2019-08-11 20:00:17 +0200 | [diff] [blame] | 221 | send(Socket, {osmo, StreamIdExt}, DataBin) -> |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 222 | DataEnc = try_encode({osmo, StreamIdExt}, DataBin), |
| 223 | send(Socket, ?IPAC_PROTO_OSMO, [StreamIdExt, DataEnc]); |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 224 | send(Socket, StreamID, DataBin) -> |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 225 | DataEnc = try_encode(StreamID, DataBin), |
| 226 | Size = iolist_size(DataEnc), |
| 227 | gen_tcp:send(Socket, iolist_to_binary([<<Size:2/big-unsigned-integer-unit:8>>, StreamID, DataEnc])). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 228 | |
| 229 | |
| 230 | call_sync(Pid, Request) -> |
| 231 | Ref = make_ref(), |
| 232 | Pid ! {request, {self(), Ref}, Request}, |
| 233 | receive |
| 234 | {reply, Ref, Reply} -> Reply |
| 235 | after |
| 236 | ?TIMEOUT -> {error, timeout} |
| 237 | end. |
| 238 | |
| 239 | reply({From, Ref}, Reply) -> |
| 240 | From ! {reply, Ref, Reply}. |
| 241 | |
| 242 | |
| 243 | % global module initialization |
| 244 | init() -> |
Harald Welte | 3b95a7c | 2019-08-11 20:31:41 +0200 | [diff] [blame] | 245 | ipa_sockets = ets:new(ipa_sockets, [named_table, set, public, {keypos, #ipa_socket.socket}]), |
| 246 | ipa_codecs = ets:new(ipa_codecs, [named_table, set, public, {keypos, #ipa_codec.streamId}]). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 247 | |
| 248 | % initialize a signle socket, create its handle process |
| 249 | init_sock(Socket, CallingPid) -> |
| 250 | StreamMap = ets:new(stream_map, [set]), |
| 251 | ets:insert(ipa_sockets, #ipa_socket{socket=Socket, ipaPid=self(), streamTbl=StreamMap}), |
| 252 | CallingPid ! {ipa_init_sock_done, Socket}, |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 253 | loop(Socket, StreamMap, #ipa_ccm_options{}). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 254 | |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 255 | loop(S, StreamMap, CcmOptions) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 256 | receive |
| 257 | {request, From, Request} -> |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 258 | case ipa_proto:request(Request, CcmOptions) of |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 259 | {ccm_options, NewCcmOptions} -> |
| 260 | NextCcmOptions = NewCcmOptions, |
| 261 | Reply = ok; |
| 262 | EmbeddedReply -> |
| 263 | NextCcmOptions = CcmOptions, |
| 264 | Reply = EmbeddedReply |
| 265 | end, |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 266 | ipa_proto:reply(From, Reply), |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 267 | ipa_proto:loop(S, StreamMap, NextCcmOptions); |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 268 | {ipa_send, S, StreamId, Data} -> |
| 269 | send(S, StreamId, Data), |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 270 | ipa_proto:loop(S, StreamMap, CcmOptions); |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 271 | {tcp, S, Data} -> |
| 272 | % process incoming IPA message and mark socket active once more |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 273 | ipa_proto:process_rx_ipa_msg(S, StreamMap, CcmOptions, Data), |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 274 | inet:setopts(S, [{active, once}]), |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 275 | ipa_proto:loop(S, StreamMap, CcmOptions); |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 276 | {tcp_closed, S} -> |
| 277 | io:format("Socket ~w closed [~w]~n", [S,self()]), |
| 278 | ipa_proto:process_tcp_closed(S, StreamMap), |
| 279 | % terminate the process by not looping further |
| 280 | ok |
| 281 | end. |
| 282 | |
| 283 | % Respond with PONG to PING |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 284 | process_ccm_msg(Socket, StreamID, _, ping, _) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 285 | io:format("Socket ~p Stream ~p: PING -> PONG~n", [Socket, StreamID]), |
| 286 | send(Socket, StreamID, <<?IPAC_MSGT_PONG>>); |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 287 | % Respond to ID_ACK with ID_ACK if this instance did not initiate |
| 288 | process_ccm_msg(Socket, StreamID, CcmOptions, id_ack, _) -> |
| 289 | if |
| 290 | CcmOptions#ipa_ccm_options.initiate_ack /= true -> |
| 291 | % Only respond to an ack if this instance did |
| 292 | % not initiate to prevent an infinite ack loop. |
| 293 | io:format("Socket ~p Stream ~p: ID_ACK -> ID_ACK~n", [Socket, StreamID]), |
| 294 | send(Socket, StreamID, <<?IPAC_MSGT_ID_ACK>>); |
| 295 | true -> |
| 296 | io:format("Socket ~p Stream ~p: ID_ACK -> None~n", [Socket, StreamID]) |
| 297 | end; |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 298 | % Simply respond to ID_RESP with ID_ACK |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 299 | process_ccm_msg(Socket, StreamID, _, id_resp, _) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 300 | io:format("Socket ~p Stream ~p: ID_RESP -> ID_ACK~n", [Socket, StreamID]), |
| 301 | send(Socket, StreamID, <<?IPAC_MSGT_ID_ACK>>); |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 302 | % Simply respond to ID_GET with ID_RESP |
| 303 | process_ccm_msg(Socket, StreamID, CcmOptions, id_req, _) -> |
| 304 | io:format("Socket ~p Stream ~p: ID_GET -> ID_RESP~n", [Socket, StreamID]), |
| 305 | CcmBin = ipa_proto_ccm:encode( |
| 306 | {id_resp, |
| 307 | [{string,serial_nr,CcmOptions#ipa_ccm_options.serial_number}, |
| 308 | {string,unit_id,CcmOptions#ipa_ccm_options.unit_id}, |
| 309 | {string,mac_address,CcmOptions#ipa_ccm_options.mac_address}, |
| 310 | {string,location,CcmOptions#ipa_ccm_options.location}, |
| 311 | {string,unit_type,CcmOptions#ipa_ccm_options.unit_type}, |
| 312 | {string,equip_vers,CcmOptions#ipa_ccm_options.equipment_version}, |
| 313 | {string,sw_version,CcmOptions#ipa_ccm_options.sw_version}, |
| 314 | {string,unit_name,CcmOptions#ipa_ccm_options.unit_name} |
| 315 | ]}), |
| 316 | send(Socket, StreamID, CcmBin); |
| 317 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 318 | % Default message handler for unknown messages |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 319 | process_ccm_msg(Socket, StreamID, _, MsgType, Opts) -> |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 320 | io:format("Socket ~p Stream ~p: Unknown CCM message type ~p Opts ~p~n", |
| 321 | [Socket, StreamID, MsgType, Opts]). |
| 322 | |
| 323 | % process an incoming CCM message (Stream ID 254) |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 324 | process_rx_ccm_msg(Socket, StreamID, CcmOptions, PayloadBin) -> |
Harald Welte | 515aa33 | 2019-08-22 17:58:21 +0200 | [diff] [blame] | 325 | {MsgType, Opts} = ipa_proto_ccm:decode(PayloadBin), |
Matt Johnson | 44a4dd6 | 2020-09-08 01:35:23 -0700 | [diff] [blame] | 326 | process_ccm_msg(Socket, StreamID, CcmOptions, MsgType, Opts). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 327 | |
| 328 | send_ccm_id_get(Socket) -> |
Harald Welte | d0f391e | 2019-08-11 20:00:17 +0200 | [diff] [blame] | 329 | send(Socket, ?IPAC_PROTO_CCM, <<?IPAC_MSGT_ID_GET>>). |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 330 | |
Matt Johnson | 4621456 | 2020-09-08 01:42:49 -0700 | [diff] [blame] | 331 | send_ccm_id_ack(Socket) -> |
| 332 | send(Socket, ?IPAC_PROTO_CCM, <<?IPAC_MSGT_ID_ACK>>). |
| 333 | |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 334 | % convenience wrapper for interactive use / debugging from the shell |
| 335 | listen_accept_handle(LPort, Opts) -> |
| 336 | case gen_tcp:listen(LPort, ?IPA_SOCKOPTS ++ Opts) of |
| 337 | {ok, ListenSock} -> |
| 338 | {ok, Port} = inet:port(ListenSock), |
| 339 | {ok, Sock} = gen_tcp:accept(ListenSock), |
| 340 | {ok, IpaPid} = ipa_proto:register_socket(Sock), |
| 341 | ipa_proto:register_stream(Sock, 0, self()), |
| 342 | ipa_proto:register_stream(Sock, 255, self()), |
| 343 | gen_tcp:controlling_process(Sock, IpaPid), |
| 344 | {ok, Port}; |
| 345 | {error, Reason} -> |
| 346 | {error, Reason} |
| 347 | end. |
| 348 | |
| 349 | % gen_tcp:connect() convenience wrappers |
| 350 | connect(Address, Port, Options) -> |
| 351 | connect(Address, Port, Options, infinity). |
| 352 | |
| 353 | connect(Address, Port, Options, Timeout) -> |
| 354 | case gen_tcp:connect(Address, Port, ?IPA_SOCKOPTS ++ Options, Timeout) of |
| 355 | {ok, Socket} -> |
| 356 | case ipa_proto:register_socket(Socket) of |
Harald Welte | 5cde762 | 2012-01-23 23:18:28 +0100 | [diff] [blame] | 357 | {ok, IpaPid} -> |
| 358 | {ok, {Socket, IpaPid}}; |
Harald Welte | 176e28c | 2010-12-19 22:56:58 +0100 | [diff] [blame] | 359 | {error, Reason} -> |
| 360 | gen_tcp:close(Socket), |
| 361 | {error, Reason} |
| 362 | end; |
| 363 | {error, Reason} -> |
| 364 | {error, Reason} |
| 365 | end. |
| 366 | |
| 367 | % Utility function to continuously server incomming IPA connections on a |
| 368 | % listening TCP socket |
| 369 | start_listen(LPort, NumServers, Opts) -> |
| 370 | case gen_tcp:listen(LPort, ?IPA_SOCKOPTS ++ Opts) of |
| 371 | {ok, ListenSock} -> |
| 372 | start_servers(NumServers, ListenSock, self()), |
| 373 | {ok, Port} = inet:port(ListenSock), |
| 374 | Port; |
| 375 | {error, Reason} -> |
| 376 | {error, Reason} |
| 377 | end. |
| 378 | |
| 379 | start_servers(0, _, _) -> |
| 380 | ok; |
| 381 | start_servers(Num, LS, CtrlPid) -> |
| 382 | spawn(?MODULE, listen_server, [LS, CtrlPid]), |
| 383 | start_servers(Num-1, LS, CtrlPid). |
| 384 | |
| 385 | listen_server(LS, CtrlPid) -> |
| 386 | case gen_tcp:accept(LS) of |
| 387 | {ok, S} -> |
| 388 | io:format("Accepted TCP connection from ~p~n", [inet:peername(S)]), |
| 389 | % assign the socket to the Controlling process |
| 390 | gen_tcp:controlling_process(S, CtrlPid), |
| 391 | CtrlPid ! {ipa_tcp_accept, S}, |
| 392 | listen_server(LS, CtrlPid); |
| 393 | Other -> |
| 394 | io:format("accept returned ~w - goodbye!~n", [Other]), |
| 395 | ok |
| 396 | end. |