Make use of T3142 received from BTS

Related: OS#3928
Change-Id: I4e26f181db9693d3a267a879e2aebda12eab2a8c

src/bts.cpp

@@ -76,7 +76,7 @@ void bts_trx_free_all_tbf(struct gprs_rlcmac_trx *trx)
 }
 
 static struct osmo_tdef T_defs_bts[] = {
-	{ .T=3142, .default_val=20,  .unit=OSMO_TDEF_S,  .desc="timer (s)", .val=0 },
+	{ .T=3142, .default_val=20,  .unit=OSMO_TDEF_S,  .desc="Wait Indication used in Imm Ass Reject during TBF Establishment (s)", .val=0, .min_val = 0, .max_val = 255 }, /* TS 44.018 10.5.2.43 */
 	{ .T=3169, .default_val=5,   .unit=OSMO_TDEF_S,  .desc="Reuse of USF and TFI(s) after the MS uplink TBF assignment is invalid (s)", .val=0 },
 	{ .T=3191, .default_val=5,   .unit=OSMO_TDEF_S,  .desc="Reuse of TFI(s) after sending (1) last RLC Data Block on TBF(s), or (2) PACKET TBF RELEASE for an MBMS radio bearer (s)", .val=0 },
 	{ .T=3193, .default_val=100, .unit=OSMO_TDEF_MS, .desc="Reuse of TFI(s) after reception of final PACKET DOWNLINK ACK/NACK from MS for TBF (ms)", .val=0 },
@@ -890,7 +890,8 @@ send_imm_ass_rej:
 	if (rc != 0) {
 		LOGP(DRLCMAC, LOGL_DEBUG, "Tx Immediate Assignment Reject on AGCH\n");
 		plen = Encoding::write_immediate_assignment_reject(
-			bv, rip->ra, Fn, rip->burst_type);
+			bv, rip->ra, Fn, rip->burst_type,
+			(uint8_t)osmo_tdef_get(bts->T_defs_bts, 3142, OSMO_TDEF_S, -1));
 		bts_do_rate_ctr_inc(bts, CTR_IMMEDIATE_ASSIGN_REJ);
 	} else {
 		LOGP(DRLCMAC, LOGL_DEBUG, "Tx Immediate Assignment on AGCH: "

src/encoding.cpp

@@ -361,10 +361,8 @@ static int write_ia_rest_egprs_uplink_sba(const gprs_rlcmac_ul_tbf *tbf, bitvec
  * Immediate assignment reject, sent on the CCCH/AGCH
  * see GSM 44.018, 9.1.20 + 10.5.2.30
  */
-int Encoding::write_immediate_assignment_reject(
-	bitvec *dest, uint16_t ra,
-	uint32_t ref_fn,
-	enum ph_burst_type burst_type)
+int Encoding::write_immediate_assignment_reject(bitvec *dest, uint16_t ra,
+	uint32_t ref_fn, enum ph_burst_type burst_type, uint8_t t3142)
 {
 	unsigned wp = 0;
 	int plen;
@@ -404,8 +402,8 @@ int Encoding::write_immediate_assignment_reject(
 		bitvec_write_field(dest, &wp, ref_fn % 51, 6);          // T3
 		bitvec_write_field(dest, &wp, ref_fn % 26, 5);          // T2
 
-		/* TODO: Make it configurable */
-		bitvec_write_field(dest, &wp, 20, 8); //Wait Indication 1
+		/* 10.5.2.43 Wait Indication */
+		bitvec_write_field(dest, &wp, t3142, 8);
 	}
 
 	plen = wp / 8;

src/encoding.h

@@ -59,7 +59,8 @@ public:
 	static int write_immediate_assignment_reject(
 			bitvec *dest, uint16_t ra,
 			uint32_t ref_fn,
-			enum ph_burst_type burst_type
+			enum ph_burst_type burst_type,
+			uint8_t t3142
 		);
 
 	static void write_packet_uplink_assignment(

tests/types/TypesTest.cpp

@@ -877,7 +877,7 @@ void test_immediate_assign_rej()
 	bitvec_unhex(immediate_assignment_rej, DUMMY_VEC);
 	plen = Encoding::write_immediate_assignment_reject(
 		immediate_assignment_rej, 112, 100,
-		GSM_L1_BURST_TYPE_ACCESS_1);
+		GSM_L1_BURST_TYPE_ACCESS_1, 20);
 
 	printf("assignment reject: %s\n",
 		osmo_hexdump(immediate_assignment_rej->data, 22));
@@ -892,7 +892,7 @@ void test_immediate_assign_rej()
 
 	plen = Encoding::write_immediate_assignment_reject(
 		immediate_assignment_rej, 112, 100,
-		GSM_L1_BURST_TYPE_ACCESS_0);
+		GSM_L1_BURST_TYPE_ACCESS_0, 20);
 
 	printf("assignment reject: %s\n",
 		osmo_hexdump(immediate_assignment_rej->data, 22));