174 lines
4.7 KiB
Plaintext
174 lines
4.7 KiB
Plaintext
/* PCU Interface codec poart in TTCN-3
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* (C) 2018 Harald Welte <laforge@gnumonks.org>
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* contributions by sysmocom - s.f.m.c. GmbH
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* All rights reserved.
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*
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* Released under the terms of GNU General Public License, Version 2 or
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* (at your option) any later version.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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module PCUIF_CodecPort {
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import from Osmocom_Types all;
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import from PCUIF_Types all;
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import from UD_PortType all;
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import from UD_Types all;
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type record PCUIF_send_data {
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PCUIF_Message data,
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integer id
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};
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private function PCUIF_to_UD(in PCUIF_send_data pin, out UD_send_data pout) {
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pout.id := pin.id;
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pout.data := enc_pad_PCUIF_Message(pin.data);
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} with { extension "prototype(fast)" };
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private function fix_padding(inout PCUIF_data data) {
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data.data := substr(data.data, 0, data.len);
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}
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private function UD_to_PCUIF(in UD_send_data pin, out PCUIF_send_data pout) {
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pout.id := pin.id;
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pout.data := dec_PCUIF_Message(pin.data);
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/* HACK: fix padding in decoded message. Due to a bug in TITAN, we
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* cannot just use its 'PADDING' attribute because it breaks decoding. */
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if (ischosen(pout.data.u.data_req)) { fix_padding(pout.data.u.data_req); }
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if (ischosen(pout.data.u.data_cnf)) { fix_padding(pout.data.u.data_cnf); }
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if (ischosen(pout.data.u.data_ind)) { fix_padding(pout.data.u.data_ind); }
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} with { extension "prototype(fast)" };
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type port PCUIF_CODEC_PT message {
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out UD_close, UD_listen, UD_shutdown, UD_connect, PCUIF_send_data;
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in UD_listen_result, UD_connect_result, UD_connected, PCUIF_send_data;
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} with { extension "user UD_PT
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out (
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UD_close -> UD_close:simple;
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UD_listen -> UD_listen:simple;
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UD_shutdown -> UD_shutdown:simple;
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UD_connect -> UD_connect:simple;
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PCUIF_send_data -> UD_send_data: function(PCUIF_to_UD)
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)
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in (
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UD_listen_result -> UD_listen_result:simple;
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UD_connect_result -> UD_connect_result:simple;
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UD_send_data -> PCUIF_send_data: function(UD_to_PCUIF);
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UD_connected -> UD_connected:simple
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)"
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};
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template PCUIF_send_data t_SD_PCUIF(integer id, template PCUIF_Message pdu) := {
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data := pdu,
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id := id
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}
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template PCUIF_send_data t_SD_PCUIF_MSGT(integer id, template PCUIF_MsgType msg_type,
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template uint8_t bts_nr := ?) := {
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data := {
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msg_type := msg_type,
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bts_nr := bts_nr,
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spare := ?,
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u := ?
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},
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id := id
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}
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function f_pcuif_connect(PCUIF_CODEC_PT pt, charstring sock) return integer {
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var UD_connect_result res;
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timer T := 5.0;
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T.start;
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pt.send(UD_connect:{sock, -1});
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alt {
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[] pt.receive(UD_connect_result:?) -> value res {
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if (ispresent(res.result) and ispresent(res.result.result_code) and
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res.result.result_code == ERROR) {
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if (ispresent(res.result.err)) {
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setverdict(fail, "Error connecting to PCU socket ", sock, ": ", res.result.err);
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} else {
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setverdict(fail, "Error connecting to PCU socket ", sock);
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}
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mtc.stop;
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} else {
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return res.id;
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}
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}
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[] T.timeout {
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setverdict(fail, "Timeout connecting to PCU socket ", sock);
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mtc.stop;
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}
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}
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return -23;
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}
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function f_pcuif_close(PCUIF_CODEC_PT pt, integer id)
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{
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pt.send(UD_close:{id := id});
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}
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function f_pcuif_listen(PCUIF_CODEC_PT pt, charstring sock) return integer {
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var UD_listen_result res;
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var UD_connected udc;
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timer T := 5.0;
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pt.send(UD_listen:{sock});
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T.start;
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alt {
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[] pt.receive(UD_listen_result:?) -> value res {
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if (ispresent(res.result) and ispresent (res.result.result_code) and
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res.result.result_code == ERROR) {
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if (ispresent(res.result.err)) {
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setverdict(fail, "Error listening on PCU socket ", sock, ": ", res.result.err);
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} else {
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setverdict(fail, "Error listening on PCU socket ", sock);
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}
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mtc.stop;
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} else {
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return res.id;
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}
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}
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[] T.timeout {
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setverdict(fail, "Timeout waiting for PCU socket ", sock, " connection");
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mtc.stop;
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}
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}
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return -23;
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}
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function f_PCUIF_tx_imm_ass_pch(PCUIF_CODEC_PT pt, integer conn_id, octetstring imm_ass, hexstring imsi,
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uint8_t bts_nr := 0) return uint32_t {
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var PCUIF_send_data sd;
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timer T := 3.0;
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/* append 3 last imsi digits so BTS can compute pagng group */
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var hexstring last_digits := substr(imsi, lengthof(imsi)-3, 3);
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var octetstring prefix := ''O;
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log("3 last imsi digits: ", last_digits);
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for (var integer i := 0; i < 3; i := i+1) {
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prefix := prefix & int2oct(hex2int('30'H) + hex2int(last_digits[i]), 1);
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}
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pt.send(t_SD_PCUIF(conn_id,
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ts_PCUIF_DATA_REQ(bts_nr, 0, 0, 0, 0, PCU_IF_SAPI_PCH, prefix & imm_ass)));
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T.start;
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alt {
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[] pt.receive(t_SD_PCUIF(conn_id,
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tr_PCUIF_DATA_CNF(bts_nr, 0, 0, PCU_IF_SAPI_PCH))) -> value sd {
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log("IMM.ASS was sent on fn ", sd.data.u.data_cnf.fn);
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return sd.data.u.data_cnf.fn;
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}
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[] pt.receive { repeat; }
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[] T.timeout {
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setverdict(fail, "Timeout waiting for PCU DATA.cnf");
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mtc.stop;
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}
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}
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return 0;
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}
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}
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