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module M3UA_CodecPort {
/* Simple M3UA Codec Port, translating between raw SCTP primitives with
* octetstring payload towards the IPL4asp provider, and M3UA primitives
* which carry the decoded M3UA data types as payload.
*
* (C) 2019 by Harald Welte <laforge@gnumonks.org>
* All rights reserved.
*
* Released under the terms of GNU General Public License, Version 2 or
* (at your option) any later version.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
import from IPL4asp_PortType all;
import from IPL4asp_Types all;
import from M3UA_CodecPort_CtrlFunct all;
import from M3UA_Types all;
type record M3UA_RecvFrom {
ConnectionId connId,
HostName remName,
PortNumber remPort,
HostName locName,
PortNumber locPort,
PDU_M3UA msg
};
template M3UA_RecvFrom t_M3UA_RecvFrom(template PDU_M3UA msg) := {
connId := ?,
remName := ?,
remPort := ?,
locName := ?,
locPort := ?,
msg := msg
}
type record M3UA_Send {
ConnectionId connId,
integer stream optional,
PDU_M3UA msg
}
template M3UA_Send t_M3UA_Send(template ConnectionId connId, template PDU_M3UA msg,
template (omit) integer stream := omit) := {
connId := connId,
stream := stream,
msg := msg
}
private function IPL4_to_M3UA_RecvFrom(in ASP_RecvFrom pin, out M3UA_RecvFrom pout) {
pout.connId := pin.connId;
pout.remName := pin.remName;
pout.remPort := pin.remPort;
pout.locName := pin.locName;
pout.locPort := pin.locPort;
pout.msg := dec_PDU_M3UA(pin.msg);
} with { extension "prototype(fast)" };
private function M3UA_to_IPL4_Send(in M3UA_Send pin, out ASP_Send pout) {
pout.connId := pin.connId;
if (ispresent(pin.stream)) {
pout.proto := {
sctp := {
sinfo_stream := pin.stream,
sinfo_ppid := 3,
remSocks := omit,
assocId := omit
}
};
} else {
pout.proto := { tcp := { } };
}
pout.msg := enc_PDU_M3UA(pin.msg);
} with { extension "prototype(fast)" };
type port M3UA_CODEC_PT message {
out M3UA_Send;
in M3UA_RecvFrom,
ASP_ConnId_ReadyToRelease,
ASP_Event;
} with { extension "user IPL4asp_PT
out(M3UA_Send -> ASP_Send:function(M3UA_to_IPL4_Send))
in(ASP_RecvFrom -> M3UA_RecvFrom: function(IPL4_to_M3UA_RecvFrom);
ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: simple;
ASP_Event -> ASP_Event: simple)"
};
function f_set_tcp_segmentation(M3UA_CODEC_PT pt, ConnectionId connId) {
/* Set function for dissecting the binary stream into packets */
var f_IPL4_getMsgLen vl_f := refers(f_IPL4_fixedMsgLen);
/* Offset: 4, size of length: 4, delta: 0, multiplier: 1, big-endian */
M3UA_CodecPort_CtrlFunct.f_IPL4_setGetMsgLen(pt, connId, vl_f, {4, 4, 0, 1, 0});
}
}
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