pcu: Rename 'gprs_gb/Test' tp 'pcu/PCU_Tests' to align with other suites

Change-Id: Ia3350e7e1a9d6715ab81f4a5f413b7e4d728ff60

6 files changed, 1039 insertions, 0 deletions

diff --git a/pcu/GPRS_Context.ttcn b/pcu/GPRS_Context.ttcn
new file mode 100644
index 00000000..af2b2e98
--- /dev/null
+++ b/pcu/GPRS_Context.ttcn
@@ -0,0 +1,12 @@
+module GPRS_Context {
+
+import from Osmocom_Types all;
+import from GSM_Types all;
+
+	type record MmContext {
+		hexstring	imsi optional,
+		GprsTlli	tlli,
+		uint9_t		n_u
+	};
+
+}
diff --git a/pcu/GPRS_TBF.ttcn b/pcu/GPRS_TBF.ttcn
new file mode 100644
index 00000000..a35c7801
--- /dev/null
+++ b/pcu/GPRS_TBF.ttcn
@@ -0,0 +1,365 @@
+module GPRS_TBF {
+
+/* GPRS TBF Routines, intended as minimal MS-Side GPRS implementation
+ *
+ * (C) 2018 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.
+ */
+
+
+import from GSM_Types all;
+import from Osmocom_Types all;
+import from General_Types all;
+import from RLCMAC_Types all;
+import from RLCMAC_CSN1_Types all;
+import from LLC_Types all;
+import from GPRS_Context all;
+
+/* input parameters into TBF (mostly mode/cs + LLC PDUs */
+
+type record UlTbfPars {
+	/* Acknowledged mode (true) or unacknowledged (false) */
+	boolean			ack_mode,
+	/* Coding Scheme for transmission, determines block size */
+	GprsCodingScheme	initial_cs,
+	/* list of abstract/decoded LLC PDUs */
+	record of PDU_LLC	llc_pdus optional,
+	/* possibly computed: list of encoded LLC PDUs */
+	record of octetstring 	llc_pdus_enc
+}
+
+type record RlcEndpointTx {
+	/* send state variable V(S) (9.1.1): 0 .. SNS-1 */
+	integer			v_s,
+	/* acknowledge state variable V(A) (9.1.2): BSN value of oldest RLC data block that has not
+	 * been positively acknowledged by peer. */
+	integer			v_a,
+	/* acknowledge state array V(B) (9.1.3) */
+	bitstring		v_b
+}
+private function f_RlcEndpointTx_init(inout RlcEndpointTx ep) {
+	ep.v_s := 0;
+	ep.v_a := 0;
+	ep.v_b := int2bit(0, 128); /* FIXME: EGPRS 2048 bits length */
+}
+
+type record RlcEndpointRx {
+	/* receive state variable V(R) (9.1.5): BSN one higher than highest BSN yet received (mod SNS) */
+	integer			v_r,
+	/* receive window state variable V(Q) (9.1.6): Lowest BSN not yet received (mod SNS) */
+	integer			v_q,
+	/* receive state array V(N) (9.1.7) */
+	bitstring		v_n
+}
+
+private function f_RlcEndpointRx_init(inout RlcEndpointRx ep) {
+	ep.v_r := 0;
+	ep.v_q := 0;
+	ep.v_n := int2bit(0, 128); /* FIXME: EGPRS 2048 bits length */
+}
+
+
+type record UlTbfState {
+	/* "const" input state with TBF Data */
+	UlTbfPars		tbf,
+	uint8_t			num_ts,
+
+	RlcEndpointTx		et,
+
+	integer			tfi,
+	/* total length of all encoded LLC PDUs */
+	integer			llc_pdu_totlen,
+	/* index of current/next PDU in llc_pdus_enc */
+	integer			cur_pdu,
+	/* byte offset into current/next PDU; next byte to transmit */
+	integer			cur_index,
+	/* block sequence number of next block within TBF */
+	integer			bsn_p,
+	/* total number of bytes remaining in TBF */
+	integer			total_bytes_remain,
+
+	/* list of already-sent RLC/MAC Blocks */
+	record of RlcmacUlBlock	rlc_sent
+}
+
+function f_UlTbfState_init(inout UlTbfState us, in UlTbfPars utpars) {
+	var RlcmacUlBlock blk;
+
+	us.tbf := utpars;
+	us.num_ts := 1;
+
+	f_RlcEndpointTx_init(us.et);
+
+	us.tfi := 0;	/* FIXME */
+	us.cur_pdu := 0;
+	us.cur_index := 0;
+	us.bsn_p := 0;
+	us.total_bytes_remain := 0;
+	us.rlc_sent := {};
+
+	/* encode all LLC PDUs from their abstract type to octetstring */
+	us.cur_pdu := 0;	/* currently processed PDU */
+	us.cur_index := 0;	/* next to-be transmitted index */
+	if (ispresent(us.tbf.llc_pdus)) {
+		us.tbf.llc_pdus_enc := {};
+		us.llc_pdu_totlen := 0;
+		for (var integer i := 0; i < sizeof(us.tbf.llc_pdus); i := i+1) {
+			var octetstring cur_enc := enc_PDU_LLC(us.tbf.llc_pdus[i]);
+			us.tbf.llc_pdus_enc := us.tbf.llc_pdus_enc & { cur_enc };
+			us.llc_pdu_totlen := us.llc_pdu_totlen + lengthof(cur_enc);
+		}
+		us.total_bytes_remain := us.llc_pdu_totlen;
+	}
+}
+
+private function f_UlTbf_ack_one_block(inout UlTbfState us, integer n) {
+	/* compute index into v_b */
+	var integer idx := n - us.et.v_a;
+	if (idx < 0 or idx > lengthof(us.et.v_b)) {
+		setverdict(fail, "UlTbf: Cannot ACK ", n, " while V(A) is ", us.et.v_a);
+		self.stop;
+	}
+	/* set the bit in the acknowledge state array */
+	us.et.v_b[idx] := '1'B;
+}
+
+/* check if V(B) contains '1' at lower end: if yes, advance V(A) and shift V(B) */
+private function f_UlTbf_check_advance_v_a(inout UlTbfState us) {
+	log("FIXME: Implement this");
+}
+
+/* copy 'len' number of bytes from current pending LLC PDU */
+private function f_copy_from_llc(inout UlTbfState us, integer len) return octetstring
+{
+	var integer pdu_len := lengthof(us.tbf.llc_pdus_enc[us.cur_pdu])
+	var octetstring ret;
+
+	ret := substr(us.tbf.llc_pdus_enc[us.cur_pdu], us.cur_index, len);
+
+	us.cur_index := us.cur_index + len;
+	us.total_bytes_remain := us.total_bytes_remain - len;
+
+	log("copy_from_llc: ", ret, " us: ", us);
+
+	/* if we completed this PDU, move on to the next, resetting the index */
+	if (us.cur_index >= pdu_len) {
+		us.cur_pdu := us.cur_pdu +1;
+		us.cur_index := 0;
+		log("copy_from_llc (incrementing pdu)");
+	}
+
+	return ret;
+}
+
+/* generate one LlcBlock (maximum size 'max_len') */
+private function f_ul_tbf_pull_one(out LlcBlock ret, inout LlcBlockHdr prev_hdr,
+				   inout UlTbfState us, integer max_len,
+				   boolean is_final) return boolean
+{
+	/* if we've already pulled all data from all LLC PDUs: nothing to do */
+	if (us.cur_pdu >= sizeof(us.tbf.llc_pdus_enc)) {
+		log("pull_one: No more data", us);
+		return false;
+	}
+
+	var integer pdu_len := lengthof(us.tbf.llc_pdus_enc[us.cur_pdu])
+	var integer cur_llc_remain_len := pdu_len - us.cur_index;
+	var integer len;
+	var LlcBlock lb;
+
+	if (us.cur_index == 0) {
+		/* start of a new LLC PDU */
+		prev_hdr.more := true;
+	}
+
+	if (cur_llc_remain_len > max_len) {
+		log("Chunk with length ", cur_llc_remain_len, " larger than space (",
+			max_len, ") left in block");
+		len := max_len;
+		lb := {
+			hdr := omit,
+			payload := f_copy_from_llc(us, len)
+		}
+	} else if (cur_llc_remain_len == max_len and is_final) {
+		/* final RLC block of TBF and LLC remainder fits exactly */
+		len := max_len;
+		lb := {
+			hdr := omit,
+			payload := f_copy_from_llc(us, len)
+		}
+		prev_hdr.e := true;
+	} else if (cur_llc_remain_len == max_len) {
+		/* LLC remaineder would fit exactly -> "singular case" with L=0 */
+		len := max_len - 1;
+		lb := {
+			hdr := {
+				length_ind := 0,
+				more := false,
+				e := true
+			},
+			payload := f_copy_from_llc(us, len)
+		}
+		prev_hdr.e := false;
+	} else {
+		/* normal case: cur_llc_remain_len < max_len */
+		len := cur_llc_remain_len;
+		lb := {
+			hdr := {
+				length_ind := len,
+				more := false,
+				e := true
+			},
+			payload := f_copy_from_llc(us, len)
+		}
+		prev_hdr.e := false;
+	}
+	ret := lb;
+	return true;
+}
+
+/* return encoded size of one given LlcBlock */
+private function f_LlcBlock_enc_len(LlcBlock blk) return integer {
+	if (isvalue(blk.hdr)) {
+		return 1 + lengthof(blk.payload);
+	} else {
+		return lengthof(blk.payload);
+	}
+}
+
+/* return encoded size of given record of LlcBlock */
+private function f_LlcBlocks_enc_len(LlcBlocks blks) return integer {
+	var integer sum := 0;
+	for (var integer i := 0; i < sizeof(blks); i := i+1) {
+		sum := sum + f_LlcBlock_enc_len(blks[i]);
+	}
+	return sum;
+}
+
+private function f_ul_tbf_pull_multi(out LlcBlocks ret, inout UlTbfState us, integer max_len,
+				     boolean is_final) return boolean
+{
+	var integer space_left;
+	var boolean rc;
+	ret := {};
+
+	/* loop as long as we have pending LLC data and space left in the current block... */
+	for (space_left := max_len; space_left > 0; space_left := max_len - f_LlcBlocks_enc_len(ret)) {
+		var LlcBlock lb;
+		var integer ret_size := sizeof(ret);
+		if (ret_size > 0) {
+			rc := f_ul_tbf_pull_one(lb, ret[ret_size-1].hdr, us, space_left, is_final);
+		} else {
+			var LlcBlockHdr dummy_hdr;
+			rc := f_ul_tbf_pull_one(lb, dummy_hdr, us, space_left, is_final);
+		}
+		if (rc == false) {
+			/* we couldn't fill the full RLC block, insufficient LLC Data */
+			if (sizeof(ret) == 0) {
+				/* we couldn't obtain any LlcBlocks at all */
+				return false;
+			} else {
+				/* we have some LlcBlocks from earlier iterations */
+				return true;
+			}
+		}
+		ret := ret & {lb};
+	}
+	return true;
+}
+
+/* Determine 'K' value for given CS (TS 44.060 9.3.1.1) */
+private function f_k_for_cs(GprsCodingScheme cs) return integer {
+	/* FIXME: EGPRS */
+	return 1;
+}
+
+/* TS 44.060 9.3.1.1 */
+private function f_calc_cv(integer nbc, integer bsn_p, integer nts, GprsCodingScheme cs,
+			   integer bs_cv_max) return integer {
+	var integer dividend := nbc - bsn_p - 1;
+	var integer k := f_k_for_cs(cs);
+	var integer divisor := nts * k;
+	var integer x := f_div_round_up(dividend, divisor);
+	if (x <= bs_cv_max) {
+		return x;
+	} else {
+		return 15;
+	}
+}
+
+private function f_rlcmac_hdr_size(boolean tlli_needed) return integer {
+	var integer ret := 2;
+	if (tlli_needed) {
+		ret := ret + 4;
+	}
+	return ret;
+}
+
+/* determine countdown value based on remaining length pending */
+private function f_ul_tbf_get_cv(inout UlTbfState us, GprsCodingScheme cs, boolean tlli_needed)
+return integer {
+	var integer hdr_size := f_rlcmac_hdr_size(tlli_needed); /* FIXME: PFI, ... */
+	var integer blk_len_net := f_gprs_blocksize(cs) - hdr_size;
+	var integer num_remain := f_div_round_up(us.total_bytes_remain, blk_len_net);
+	var integer cv := f_calc_cv(num_remain + sizeof(us.rlc_sent), us.bsn_p, us.num_ts, us.tbf.initial_cs, 14 /* FIXME */);
+	log("CV=", cv, ", num_rmain=", num_remain, " from ", us);
+	return cv;
+}
+
+
+function f_ul_tbf_get_next_block(out RlcmacUlBlock blk, inout UlTbfState us, inout MmContext mmctx,
+				 boolean tlli_needed := false) return boolean {
+	var integer hdr_size := f_rlcmac_hdr_size(tlli_needed); /* FIXME: TLLI, PFI, ... */
+	var integer len_remain := f_gprs_blocksize(us.tbf.initial_cs) - hdr_size;
+	var octetstring payload;
+	var integer cv;
+	var LlcBlocks llc_blocks;
+
+	cv := f_ul_tbf_get_cv(us, us.tbf.initial_cs, tlli_needed);
+	/* potentially get multiple payload chunks of multiple LLC PDUs */
+	if (f_ul_tbf_pull_multi(llc_blocks, us, len_remain, false) == false) {
+		return false;
+	}
+
+	/* include TLLI when needed */
+	if (tlli_needed) {
+		blk := valueof(t_RLCMAC_UL_DATA_TLLI(us.tfi, cv, us.et.v_s,
+						llc_blocks, false, mmctx.tlli));
+	} else {
+		blk := valueof(t_RLCMAC_UL_DATA(us.tfi, cv, us.et.v_s, llc_blocks, false));
+	}
+
+	/* Increment Block Sequence Number */
+	us.bsn_p := us.bsn_p + 1;
+	us.et.v_s := us.bsn_p mod 128; /* FIXME: EGPRS SNS: 2048 */
+
+	/* append to list of sent blocks */
+	us.rlc_sent := us.rlc_sent & { blk };
+
+	return true;
+}
+
+function f_ul_tbf_process_acknack(inout UlTbfState us, RlcmacDlCtrlBlock db) {
+	if (ispresent(db.payload.u.ul_ack_nack.gprs)) {
+		var UlAckNackGprs uan_gprs := db.payload.u.ul_ack_nack.gprs;
+		if (ispresent(uan_gprs.cont_res_tlli)) {
+			/* FIXME: check for contention resolution */
+		}
+		var integer i;
+		/* iterate over received bitmap, ACK each block in our TBF state */
+		for (i := lengthof(uan_gprs.ack_nack_desc.receive_block_bitmap)-1; i >= 0; i := i-1) {
+			if (uan_gprs.ack_nack_desc.receive_block_bitmap[i] == '1'B) {
+				var integer seq := uan_gprs.ack_nack_desc.starting_seq_nr + i;
+				f_UlTbf_ack_one_block(us, seq);
+			}
+		}
+		f_UlTbf_check_advance_v_a(us);
+	}
+}
+
+
+
+}
diff --git a/pcu/PCU_Tests.cfg b/pcu/PCU_Tests.cfg
new file mode 100644
index 00000000..20de54c9
--- /dev/null
+++ b/pcu/PCU_Tests.cfg
@@ -0,0 +1,58 @@
+[ORDERED_INCLUDE]
+# Common configuration, shared between test suites
+"../Common.cfg"
+
+[LOGGING]
+#*.FileMask := LOG_ALL
+ConsoleMask := ERROR | WARNING | TESTCASE | TIMEROP_START | DEBUG_ENCDEC
+
+[MODULE_PARAMETERS]
+#mp_local_ip := "192.168.100.239"
+#mp_local_udp_port := 23000
+#mp_remote_ip := "192.168.100.196"
+#mp_remote_udp_port := 21000
+NS_Emulation.mp_local_ip := "127.0.0.1"
+NS_Emulation.mp_local_udp_port := 23000
+NS_Emulation.mp_remote_ip := "127.0.0.1"
+NS_Emulation.mp_remote_udp_port := 23001
+NS_Emulation.mp_nsei := 1234
+NS_Emulation.mp_nsvci := 1234
+PCU_Tests.mp_gb_cfg := {
+	nsei := 1234,
+	bvci := 1234,
+	cell_id := {
+		ra_id := {
+			lai := {
+				mcc_mnc := '00101F'H, lac := 1
+			},
+			rac := 0
+		},
+		cell_id := 0
+	},
+	sgsn_role := true
+}
+
+[TESTPORT_PARAMETERS]
+#*.BSCVTY.CTRL_MODE := "client"
+#*.BSCVTY.CTRL_HOSTNAME := "127.0.0.1"
+#*.BSCVTY.CTRL_PORTNUM := "4242"
+#*.BSCVTY.CTRL_LOGIN_SKIPPED := "yes"
+#*.BSCVTY.CTRL_DETECT_SERVER_DISCONNECTED := "yes"
+#*.BSCVTY.CTRL_READMODE := "buffered"
+#*.BSCVTY.CTRL_CLIENT_CLEANUP_LINEFEED := "yes"
+#*.BSCVTY.PROMPT1 := "OpenBSC> "
+#*.BSCVTY.PROMPT2 := "OpenBSC# "
+#*.BSCVTY.REGEX_PROMPT1 := "^OpenBSC.*$"
+
+*.*.udpReuseAddress := "yes";
+
+[MAIN_CONTROLLER]
+
+[EXECUTE]
+#PCU_Tests.TC_selftest_llc
+#PCU_Tests.TC_selftest_rlcmac
+#PCU_Tests.TC_selftest_bssgp
+#PCU_Tests.TC_nsem
+#PCU_Tests.TC_paging
+PCU_Tests.TC_rach
+#PCU_Tests.TC_selftest_rr
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
new file mode 100644
index 00000000..d4ce7ee7
--- /dev/null
+++ b/pcu/PCU_Tests.ttcn
@@ -0,0 +1,539 @@
+module PCU_Tests {
+
+	import from General_Types all;
+	import from Osmocom_Types all;
+	import from GSM_Types all;
+	import from GSM_RR_Types all;
+	import from Osmocom_Gb_Types all;
+	import from BSSGP_Types all;
+	import from BSSGP_Emulation all;
+	import from NS_Types all;
+	import from NS_Emulation all;
+	import from LLC_Types all;
+	import from LLC_Templates all;
+	import from RLCMAC_Types all;
+	import from RLCMAC_CSN1_Types all;
+	import from LAPDm_RAW_PT all;
+	import from GPRS_Context all;
+	import from GPRS_TBF all;
+
+	modulepar {
+		BssgpConfig mp_gb_cfg := {
+			nsei := 1234,
+			bvci := 1234,
+			cell_id := {
+				ra_id := {
+					lai := {
+						mcc_mnc := '26242F'H, lac := 13135
+					},
+					rac := 0
+				},
+				cell_id := 20960
+			},
+			sgsn_role := true
+		};
+	}
+
+	type component dummy_CT extends BSSGP_Client_CT {
+		var lapdm_CT lapdm_component;
+		port LAPDm_PT L1;
+
+		var NS_CT ns_component;
+		var BSSGP_CT bssgp_component;
+
+		var MmContext g_mmctx := {
+			tlli := 'FFFFFFFF'O,
+			n_u := 0
+		};
+
+		var boolean g_initialized := false;
+	}
+
+	function f_init() runs on dummy_CT {
+		if (g_initialized == true) {
+			return;
+		}
+		g_initialized := true;
+		/* create a new NS component */
+		ns_component := NS_CT.create;
+		bssgp_component := BSSGP_CT.create;
+		/* connect our BSSGP port to the BSSGP Emulation */
+		connect(self:BSSGP, bssgp_component:BSSGP_SP);
+		connect(self:BSSGP_PROC, bssgp_component:BSSGP_PROC);
+		/* connect lower-end of BSSGP with BSSGP_CODEC_PORT (maps to NS_PT*/
+		connect(bssgp_component:BSCP, ns_component:NS_SP);
+		/* connect lower-end of NS emulation to NS_CODEC_PORT (on top of IPl4) */
+		map(ns_component:NSCP, system:NS_CODEC_PORT);
+		ns_component.start(NSStart());
+		bssgp_component.start(BssgpStart(mp_gb_cfg));
+
+		lapdm_component := lapdm_CT.create;
+		connect(self:L1, lapdm_component:LAPDM_SP);
+		map(lapdm_component:L1CTL, system:L1CTL);
+		lapdm_component.start(LAPDmStart());
+
+		f_bssgp_client_register(g_mmctx.imsi, g_mmctx.tlli, mp_gb_cfg.cell_id);
+		f_bssgp_establish();
+	}
+
+	function f_exit() runs on dummy_CT {
+		lapdm_component.stop;
+		ns_component.stop;
+		bssgp_component.stop;
+	}
+
+	function f_bssgp_dec_and_log(in octetstring inp) {
+		log("BSSGP Input: ", inp);
+		var PDU_BSSGP dec := dec_PDU_BSSGP(inp);
+		log("BSSGP Decoded: ", dec);
+	}
+
+	testcase TC_selftest_bssgp() runs on dummy_CT {
+		const octetstring c_bvc_reset_pcu := '2204820000078108088832f44000c80051e0'O;
+		const octetstring c_bvc_reset_q := '2204820000078100'O;
+		const octetstring c_status_pcu := '4107810515882204820000078103'O;
+		const octetstring c_reset_ack_q := '2304820000'O;
+		const octetstring c_reset_ack_pcu := '23048200c4'O;
+		const octetstring c_unblock_pcu := '24048200c4'O;
+		const octetstring c_unblock_ack_q := '25048200c4'O;
+		const octetstring c_fc_bvc_pcu := '261e8101058200fa038200c8018200fa1c8200c806820000'O;
+		const octetstring c_fc_bvc_ack_q := '271e8101'O;
+		const octetstring c_gmm_mo_att_req := '01bb146ddd000004088832f44000c80051e000800e003b01c001080103e5e000110a0005f4fb146ddd32f44000c8001d1b53432b37159ef9090070000dd9c6321200e00019b32c642401c0002017057bf0ec'O;
+		const octetstring c_gmm_mt_ac_req := '00bb146ddd0050001682ffff0a8204030e9c41c001081200102198c72477ea104895e8b959acc58b108182f4d045'O;
+		const octetstring c_gmm_mo_ac_resp := '01bb146ddd000004088832f44000c80051e000800e000e01c00508130122fa361f5fdd623d'O;
+		const octetstring c_gmm_mt_att_acc := '00bb146ddd0050001682ffff0a8204030e9841c005080201340432f44000c8001805f4fb146ddd0967d0'O;
+		const octetstring c_gmm_mt_det_req := '00bb146ddd0050001682ffff0a8204030e8941c00908050215f0b6'O;
+		const octetstring c_gmm_mo_att_cpl := '01fb146ddd000004088832f44000c80051e000800e000801c009080339d7bc'O;
+
+		f_bssgp_dec_and_log(c_bvc_reset_pcu);
+		f_bssgp_dec_and_log(c_bvc_reset_q);
+		f_bssgp_dec_and_log(c_status_pcu);
+		f_bssgp_dec_and_log(c_reset_ack_q);
+		f_bssgp_dec_and_log(c_reset_ack_pcu);
+		f_bssgp_dec_and_log(c_unblock_pcu);
+		f_bssgp_dec_and_log(c_unblock_ack_q);
+		f_bssgp_dec_and_log(c_fc_bvc_pcu);
+		f_bssgp_dec_and_log(c_fc_bvc_ack_q);
+		f_bssgp_dec_and_log(c_gmm_mo_att_req);
+		f_bssgp_dec_and_log(c_gmm_mt_ac_req);
+		f_bssgp_dec_and_log(c_gmm_mo_ac_resp);
+		f_bssgp_dec_and_log(c_gmm_mt_att_acc);
+		f_bssgp_dec_and_log(c_gmm_mt_det_req);
+		f_bssgp_dec_and_log(c_gmm_mo_att_cpl);
+
+		log(ts_BSSGP_PS_PAGING_IMSI(196, '262420123456789'H));
+	}
+
+	function f_ns_assert_prepr(in octetstring a, in octetstring b) {
+		log("NS Input: ", a);
+		log("NS Expected: ", b);
+
+		if (a != b) {
+			setverdict(fail);
+		} else {
+			setverdict(pass);
+		}
+	}
+
+	function f_ns_dec_and_log(in octetstring inp) {
+		log("NS Input: ", inp);
+		var PDU_NS dec := dec_PDU_NS(inp);
+		log("NS Decoded: ", dec);
+	}
+
+	testcase TC_selftest_ns() runs on dummy_CT {
+		const octetstring c_ns_reset_pcu := '000000c4271e813d'O;
+
+		/* single byte length to two byte length */
+		f_ns_assert_prepr('04058101'O, '0405000101'O);
+		f_ns_assert_prepr('040589000102030405060708'O, '04050009000102030405060708'O);
+		/* two byte length to two byte length */
+		f_ns_assert_prepr('0405000101'O, '0405000101'O);
+		/* special case: NS-UNITDATA */
+		f_ns_assert_prepr('00aabbccddeeffaa29822342'O, '00aabbccddeeffaa2900022342'O);
+		/* multiple TLVs */
+		f_ns_assert_prepr('234281aa4382bbbb'O, '23420001aa430002bbbb'O);
+		/* zero-length */
+		f_ns_assert_prepr('230080'O, '23000000'O);
+
+		f_ns_dec_and_log(c_ns_reset_pcu);
+	}
+
+	const octetstring gmm_auth_req := '081200102198c72477ea104895e8b959acc58b108182'O;
+
+	/* Wrap downlink GMM into LLC, encode + send it via BSSGP to PCU */
+	function tx_gmm(BIT1 c_r, in octetstring gmm_pdu, BIT4 sapi := c_LLC_SAPI_LLGMM) runs on dummy_CT {
+		var PDU_LLC llc;
+
+		//log("GMM Tx: ", dec_PDU_L3_SGSN_MS(gmm_pdu));
+
+		log(c_r, g_mmctx.n_u, gmm_pdu, sapi);
+		llc := valueof(ts_LLC_UI(gmm_pdu, sapi, c_r, g_mmctx.n_u));
+		log(llc);
+		g_mmctx.n_u := g_mmctx.n_u + 1;
+
+		log(ts_BSSGP_DL_UD(g_mmctx.tlli, enc_PDU_LLC(llc)));
+
+		BSSGP.send(ts_BSSGP_DL_UD(g_mmctx.tlli, enc_PDU_LLC(llc)));
+	}
+
+	/* Establish BSSGP connection to PCU */
+	function f_bssgp_establish() runs on dummy_CT {
+		timer T:= 10.0;
+
+		f_init();
+		T.start
+		alt {
+			[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { }
+			[] BSSGP.receive { repeat; }
+			[] T.timeout { setverdict(fail); }
+		}
+		T.stop
+		log("BSSGP successfully initialized");
+	}
+
+	/* Send PS-PAGING via BSSGP to PCU, expect it to show up on L1/Um */
+	testcase TC_paging() runs on dummy_CT {
+		var hexstring imsi := '262420123456789'H;
+		var BssgpBvci bvci := 196;
+		var GsmTmsi tmsi := hex2int('01234567'H);
+
+		f_bssgp_establish();
+
+		BSSGP.send(ts_BSSGP_PS_PAGING_IMSI(bvci, imsi));
+		BSSGP.send(ts_BSSGP_PS_PAGING_PTMSI(bvci, imsi, tmsi));
+
+		while (true) {
+			var BssgpDecoded bd;
+			alt {
+				[] BSSGP.receive(tr_BD_L3_MT(?)) -> value bd {
+					log("BSSGP Rx: ", bd);
+				}
+				[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { repeat; }
+				[] BSSGP.receive { repeat; }
+			}
+		}
+	}
+
+	/* Establish an UL TBF: Tune to ARFCN, send RACH, receive AGCH, enable TBF Rx */
+	function f_establish_ul_tbf() runs on dummy_CT {
+		timer T := 5.0;
+		var BCCH_tune_req tune_req := { { false, 871 }, true };
+		L1.send(tune_req);
+		/* FIXME: wait for confirm */
+
+		var TBF_establish_req est_req := { ra := hex2int('7B'H) };
+		L1.send(est_req);
+		T.start;
+		/* FIXME: wait for confirm */
+		alt {
+			[] L1.receive(TBF_establish_res:?) {}
+			[] L1.receive { repeat; }
+			[] T.timeout {
+				setverdict(fail, "Timeout establishing UL TBF");
+				self.stop;
+			}
+		}
+		T.stop;
+	}
+
+	/* compute a random TLLI; FIXME: what about TLLI prefix / local/foreign/...? */
+	function f_random_tlli() return GprsTlli {
+		var GprsTlli tlli := f_rnd_octstring(4);
+		return tlli;
+	}
+
+	/* Compute the frame number of the uplink block based on current fn + rrbp */
+	function f_rrbp_fn(GsmFrameNumber fn, MacRrbp rrbp) return GsmFrameNumber {
+		var integer add;
+		select (rrbp) {
+		case (RRBP_Nplus13_mod_2715648) {
+			add := 13;
+			}
+		case (RRBP_Nplus17_or_18_mod_2715648) {
+			add := 17; /* FIXME: What about 'or 18'? */
+			}
+		case (RRBP_Nplus21_or_22_mod_2715648) {
+			add := 21; /* FIXME: What about 'or 22'? */
+			}
+		case (RRBP_Nplus26_mod_2715648) {
+			add := 26;
+			}
+		}
+		return (fn + add) mod 2715648;
+	}
+
+
+function f_bssgp_wait_ul_ud(template BssgpDecoded bd_exp) runs on dummy_CT {
+	timer T := 5.0;
+	T.start;
+	alt {
+	[] BSSGP.receive(bd_exp) {
+		log("found matching BSSGP UL-UNITDATA PDU");
+		}
+	[] T.timeout {
+		setverdict(fail, "Timeout waiting for ", bd_exp);
+		}
+	}
+}
+
+
+function f_ul_tbf(inout UlTbfState us) runs on dummy_CT {
+	var RLCMAC_ph_data_ind dl;
+
+	/* Establish an UL-TBF */
+	f_establish_ul_tbf();
+
+	while (true) {
+		var RlcmacUlBlock blk;
+		if (f_ul_tbf_get_next_block(blk, us, g_mmctx, true) == false) {
+			break;
+		}
+
+		/* Send the block to L1 for transmission */
+		log("L1=", blk);
+		L1.send(RLCMAC_ph_data_req:{dyn:={tbf_id := 0, cs := us.tbf.initial_cs, block := blk}});
+	}
+
+	alt {
+	[] L1.receive(RLCMAC_ph_data_ind:{cs:=?, ts_nr:=?, fn:=?, block:=tr_RLCMAC_ACK_NACK(0, g_mmctx.tlli)}) -> value dl {
+		log("found matching ACK/NACK");
+		/* send CTRL ACK in uplink */
+		var GsmFrameNumber ul_fn := f_rrbp_fn(dl.fn, dl.block.ctrl.mac_hdr.rrbp);
+		var RlcmacUlCtrlMsg ctrl_ack := valueof(ts_RlcMacUlCtrl_PKT_CTRL_ACK(g_mmctx.tlli));
+		var RlcmacUlBlock ul_block := valueof(ts_RLC_UL_CTRL_ACK(ctrl_ack));
+		L1.send(ts_PH_DATA_ABS(0, CS1, dl.ts_nr, ul_fn, {false, 871}, ul_block));
+		/* wait for the final ACK */
+		if (dl.block.ctrl.payload.u.ul_ack_nack.gprs.ack_nack_desc.final_ack == '0'B) {
+			repeat;
+		}
+		}
+	[] L1.receive { repeat; }
+	}
+
+	for (var integer i := 0; i < sizeof(us.tbf.llc_pdus_enc); i := i+1) {
+		f_bssgp_wait_ul_ud(tr_BD_BSSGP(tr_BSSGP_UL_UD(g_mmctx.tlli, ?, us.tbf.llc_pdus_enc[i])));
+	}
+	setverdict(pass);
+
+	L1.send(DCCH_release_req:{});
+}
+
+	testcase TC_rach() runs on dummy_CT {
+		var BssgpBvci bvci := 196;
+		g_mmctx.imsi := '262420123456789'H;
+		g_mmctx.tlli := f_random_tlli();
+
+		f_init();
+
+		f_bssgp_client_register(g_mmctx.imsi, g_mmctx.tlli, mp_gb_cfg.cell_id);
+
+		f_bssgp_establish();
+	}
+
+
+	testcase TC_nsem() runs on dummy_CT {
+
+		f_bssgp_establish();
+
+		while (true) {
+			var BssgpDecoded bd;
+			alt {
+				[] BSSGP.receive(tr_BD_BSSGP(?)) -> value bd {
+					log("BSSGP Rx: ", bd);
+					//log("GMM Rx: ", dec_PDU_L3_MS_SGSN(pdu.payload));
+					g_mmctx.tlli := bd.bssgp.pDU_BSSGP_UL_UNITDATA.tLLI;
+					tx_gmm(LLC_CR_DL_CMD, gmm_auth_req);
+				}
+				[] BSSGP.receive(t_BssgpStsInd(?, ?, BVC_S_UNBLOCKED)) { repeat; }
+				[] BSSGP.receive { repeat; }
+			}
+		}
+	}
+
+
+	function f_llc_dec_and_log(in octetstring inp) {
+		log("LLC Input: ", inp);
+		var PDU_LLC dec := dec_PDU_LLC(inp);
+		log("LLC Decoded: ", dec);
+	}
+
+	function f_llc_assert(in octetstring a, in octetstring b) {
+		log("LLC Input: ", a);
+		log("LLC Expected: ", b);
+
+		if (a != b) {
+			setverdict(fail);
+		} else {
+			setverdict(pass);
+		}
+	}
+
+
+	testcase TC_selftest_llc() runs on dummy_CT {
+		const octetstring c_gmm_att_pcu := '01c001080103e5e000210a0005f4fb146ddd32f44000c8001d1b53432b37159ef9090070000dd9c6321200e00019b32c642401c00020170580460b'O;
+		const octetstring c_gmm_att_pcu_nofcs := '01c001080103e5e000210a0005f4fb146ddd32f44000c8001d1b53432b37159ef9090070000dd9c6321200e00019b32c642401c000201705'O;
+
+		f_llc_dec_and_log(c_gmm_att_pcu);
+
+		//f_llc_assert(f_LLC_append_fcs(c_gmm_att_pcu_nofcs), c_gmm_att_pcu);
+
+		log(valueof(ts_LLC_UI(gmm_auth_req, c_LLC_SAPI_LLGMM, LLC_CR_DL_CMD, g_mmctx.n_u)));
+		log(ts_LLC_UI(gmm_auth_req, c_LLC_SAPI_LLGMM, LLC_CR_DL_CMD, g_mmctx.n_u));
+	}
+
+	testcase TC_selftest_rlcmac() runs on dummy_CT {
+		var RlcmacDlCtrlBlock dcb;
+		var RlcmacUlCtrlBlock ucb;
+		const octetstring c_dl_ul_ack_nack := '40240080400000000000000077628dbba14b2b2b2b2b2b'O;
+		const octetstring c_dl_data := '0f00007341c001081200102198c72477ea104895e8b959acc58b108182f4d0454300'O;
+		const octetstring c_dl_data2 := '070002165dc0012b2b2b43c0012b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b00'O;
+		const octetstring c_ul_ctrl_ack := '4006ec51b7772b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b'O;
+		const octetstring c_ul_dl_ack_nack := '4008004000000000000000701000edc0000b2b2b2b2b2b'O;
+		const octetstring c_dl_ul_assign := '482857628dbbaf0126e68800082b2b2b2b2b2b2b2b2b2b'O;
+
+		log(c_dl_ul_ack_nack);
+		dcb := dec_RlcmacDlCtrlBlock(c_dl_ul_ack_nack);
+		log(dcb);
+		//log(dec_RlcmacDlCtrlMsg(dcb.payload));
+
+		f_rlcmac_dld_decenc(c_dl_data);
+
+		f_rlcmac_dld_decenc(c_dl_data2);
+
+		log(c_ul_ctrl_ack);
+		ucb := dec_RlcmacUlCtrlBlock(c_ul_ctrl_ack);
+		log(ucb);
+		//log(dec_RlcmacUlCtrlMsg(ucb.payload));
+
+		log(c_ul_dl_ack_nack);
+		ucb := dec_RlcmacUlCtrlBlock(c_ul_dl_ack_nack);
+		log(ucb);
+		//log(dec_RlcmacUlCtrlMsg(ucb.payload));
+
+		log(c_dl_ul_assign);
+		dcb := dec_RlcmacDlCtrlBlock(c_dl_ul_assign);
+		log(dcb);
+		//log(dec_RlcmacDlCtrlMsg(dcb.payload));
+
+		const octetstring c_uld_tlli_noext := '080101a61cab5201c001080103e5e000310a0005f4e61cab5232f44000c8001d1b00'O;
+		f_rlcmac_uld_decenc(c_uld_tlli_noext);
+
+		const octetstring c_uld_tlli_ext7pad := '0001041da61cab5200201705a96e102b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b00'O;
+		log("ULD_decenc");
+		f_rlcmac_uld_decenc(c_uld_tlli_ext7pad);
+		log("UL_decenc");
+		f_rlcmac_ul_decenc(c_uld_tlli_ext7pad);
+
+		f_rlcmac_ul_decenc(c_ul_dl_ack_nack);
+	}
+
+	function f_rlcmac_ul_decenc(in octetstring buf) {
+		log("==================================");
+		log("In: ", buf);
+		var RlcmacUlBlock udb := dec_RlcmacUlBlock(buf);
+		log("Dec: ", udb);
+		var octetstring enc := enc_RlcmacUlBlock(udb);
+		log("Enc: ", enc);
+		if (enc != buf) { setverdict(fail, "Re-encoded data doesn't equal input data"); }
+	}
+
+	function f_rlcmac_uld_decenc(in octetstring buf) {
+		log("==================================");
+		log("In: ", buf);
+		var RlcmacUlDataBlock udb := dec_RlcmacUlDataBlock(buf);
+		log("Dec: ", udb);
+		var octetstring enc := enc_RlcmacUlDataBlock(udb);
+		log("Enc: ", enc);
+		if (enc != buf) { setverdict(fail, "Re-encoded data doesn't equal input data"); }
+	}
+
+	function f_rlcmac_dld_decenc(in octetstring buf) {
+		log("==================================");
+		log("In: ", buf);
+		var RlcmacDlDataBlock udb := dec_RlcmacDlDataBlock(buf);
+		log("Dec: ", udb);
+		var octetstring enc := enc_RlcmacDlDataBlock(udb);
+		log("Enc: ", enc);
+		if (enc != buf) { setverdict(fail, "Re-encoded data doesn't equal input data"); }
+	}
+
+
+	testcase TC_selftest_rr() runs on dummy_CT {
+		//const octetstring c_paging_none := '06210001F02B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B2B'O
+		const octetstring c_paging_none := '1506210001F0'O;
+		const octetstring c_ia_tbf := '2d063f100fe3677bd8440000c800100b2b2b2b2b2b2b2b'O
+		log(c_paging_none);
+		log(dec_GsmRrMessage(c_paging_none));
+
+		log(c_ia_tbf);
+		log(dec_GsmRrMessage(c_ia_tbf));
+	}
+
+	function f_seq_octstr(integer len) return octetstring {
+		var octetstring payload := ''O;
+		for (var integer i := 0; i < len; i := i+1 ) {
+			payload := payload & int2oct(i mod 256, 1);
+		}
+		return payload;
+	}
+
+	testcase TC_ul_tbf_single_llc_sizes() runs on dummy_CT {
+		g_mmctx.imsi := '262420123456789'H;
+		g_mmctx.tlli := f_random_tlli();
+		f_init();
+
+		for (var integer len := 1; len <= 1560; len := len+1) {
+			log("Testing Uplink TBF with single LLC-PDU of ", len, " bytes");
+			var octetstring payload := f_seq_octstr(len);
+			var UlTbfPars ul_tbf_pars := {
+				ack_mode := true,
+				initial_cs := CS1,
+				llc_pdus := {
+					valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u))
+				}
+			}
+			var UlTbfState ul_tbf_state;
+			f_UlTbfState_init(ul_tbf_state, ul_tbf_pars);
+			f_ul_tbf(ul_tbf_state);
+			f_sleep(1.0);
+		}
+
+		f_exit();
+	}
+
+	testcase TC_ul_tbf() runs on dummy_CT {
+		g_mmctx.imsi := '262420123456789'H;
+		g_mmctx.tlli := f_random_tlli();
+		f_init();
+
+		var octetstring payload := f_seq_octstr(1023);
+		var UlTbfPars ul_tbf_pars := {
+			ack_mode := true,
+			initial_cs := CS1,
+			llc_pdus := { 
+				valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u)),
+				valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u+1)),
+				valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u+2)),
+				valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u+3)),
+				valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u+4)),
+				valueof(ts_LLC_UI(payload, c_LLC_SAPI_LLGMM, '0'B, g_mmctx.n_u+5))
+			}
+		};
+		var UlTbfState ul_tbf_state;
+		f_UlTbfState_init(ul_tbf_state, ul_tbf_pars);
+		f_ul_tbf(ul_tbf_state);
+
+		f_exit();
+	}
+
+	control {
+		execute(TC_selftest_bssgp());
+		execute(TC_selftest_ns());
+		execute(TC_selftest_llc());
+		execute(TC_selftest_rr());
+		execute(TC_selftest_rlcmac());
+		execute(TC_nsem());
+		execute(TC_paging());
+	}
+};
diff --git a/pcu/gen_links.sh b/pcu/gen_links.sh
new file mode 100755
index 00000000..54d2bdd9
--- /dev/null
+++ b/pcu/gen_links.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+
+BASEDIR=../deps
+
+gen_links() {
+	DIR=$1
+	FILES=$*
+	for f in $FILES; do
+		echo "Linking $f"
+		ln -sf $DIR/$f $f
+	done
+}
+
+#DIR=$BASEDIR/titan.TestPorts.UNIX_DOMAIN_SOCKETasp/src
+#FILES="UD_PT.cc  UD_PT.hh  UD_PortType.ttcn  UD_Types.ttcn"
+#gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.Libraries.TCCUsefulFunctions/src
+FILES="TCCInterface_Functions.ttcn TCCConversion_Functions.ttcn TCCConversion.cc TCCInterface.cc TCCInterface_ip.h"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.TestPorts.Common_Components.Socket-API/src
+FILES="Socket_API_Definitions.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.TestPorts.IPL4asp/src
+FILES="IPL4asp_Functions.ttcn  IPL4asp_PT.cc  IPL4asp_PT.hh IPL4asp_PortType.ttcn  IPL4asp_Types.ttcn  IPL4asp_discovery.cc IPL4asp_protocol_L234.hh"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.TestPorts.UNIX_DOMAIN_SOCKETasp/src
+FILES="UD_PT.cc  UD_PT.hh  UD_PortType.ttcn  UD_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.NS_v7.3.0/src
+FILES="NS_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.BSSGP_v13.0.0/src
+FILES="BSSGP_EncDec.cc  BSSGP_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.MobileL3_v13.4.0/src
+FILES="MobileL3_CC_Types.ttcn MobileL3_CommonIE_Types.ttcn MobileL3_GMM_SM_Types.ttcn MobileL3_MM_Types.ttcn MobileL3_RRM_Types.ttcn MobileL3_SMS_Types.ttcn MobileL3_SS_Types.ttcn MobileL3_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.LLC_v7.1.0/src
+FILES="LLC_EncDec.cc LLC_Types.ttcn"
+gen_links $DIR $FILES
+
+DIR=$BASEDIR/titan.ProtocolModules.SNDCP_v7.0.0/src
+FILES="SNDCP_Types.ttcn"
+gen_links $DIR $FILES
+
+
+DIR=../library
+FILES="General_Types.ttcn GSM_Types.ttcn GSM_RR_Types.ttcn Osmocom_Types.ttcn RLCMAC_Types.ttcn RLCMAC_CSN1_Types.ttcn RLCMAC_EncDec.cc L1CTL_Types.ttcn L1CTL_PortType.ttcn L1CTL_PortType_CtrlFunct.ttcn L1CTL_PortType_CtrlFunctDef.cc LAPDm_RAW_PT.ttcn LAPDm_Types.ttcn "
+FILES+="NS_Emulation.ttcn NS_CodecPort.ttcn NS_CodecPort_CtrlFunct.ttcn NS_CodecPort_CtrlFunctDef.cc "
+FILES+="BSSGP_Emulation.ttcn Osmocom_Gb_Types.ttcn "
+FILES+="LLC_Templates.ttcn L3_Templates.ttcn L3_Common.ttcn "
+gen_links $DIR $FILES
diff --git a/pcu/regen_makefile.sh b/pcu/regen_makefile.sh
new file mode 100755
index 00000000..7eefd2cc
--- /dev/null
+++ b/pcu/regen_makefile.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+FILES="*.ttcn BSSGP_EncDec.cc IPL4asp_PT.cc IPL4asp_discovery.cc TCCConversion.cc TCCInterface.cc NS_CodecPort_CtrlFunctDef.cc UD_PT.cc RLCMAC_EncDec.cc LLC_EncDec.cc L1CTL_PortType_CtrlFunctDef.cc"
+
+../regen-makefile.sh PCU_Tests.ttcn $FILES