encoding: Move encoding routines into a separate file
diff --git a/src/encoding.cpp b/src/encoding.cpp
new file mode 100644
index 0000000..4dd9444
--- /dev/null
+++ b/src/encoding.cpp
@@ -0,0 +1,456 @@
+/* encoding.cpp
+ *
+ * Copyright (C) 2012 Ivan Klyuchnikov
+ * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
+ * Copyright (C) 2013 by Holger Hans Peter Freyther
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <gprs_rlcmac.h>
+#include <tbf.h>
+#include <gprs_debug.h>
+
+// GSM 04.08 9.1.18 Immediate assignment
+int write_immediate_assignment(
+ struct gprs_rlcmac_bts *bts,
+ bitvec * dest, uint8_t downlink, uint8_t ra,
+ uint32_t ref_fn, uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc,
+ uint8_t tfi, uint8_t usf, uint32_t tlli,
+ uint8_t polling, uint32_t fn, uint8_t single_block, uint8_t alpha,
+ uint8_t gamma, int8_t ta_idx)
+{
+ unsigned wp = 0;
+ uint8_t plen;
+
+ bitvec_write_field(dest, wp,0x0,4); // Skip Indicator
+ bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator
+ bitvec_write_field(dest, wp,0x3F,8); // Immediate Assignment Message Type
+
+ // 10.5.2.25b Dedicated mode or TBF
+ bitvec_write_field(dest, wp,0x0,1); // spare
+ bitvec_write_field(dest, wp,0x0,1); // TMA : Two-message assignment: No meaning
+ bitvec_write_field(dest, wp,downlink,1); // Downlink : Downlink assignment to mobile in packet idle mode
+ bitvec_write_field(dest, wp,0x1,1); // T/D : TBF or dedicated mode: this message assigns a Temporary Block Flow (TBF).
+
+ bitvec_write_field(dest, wp,0x0,4); // Page Mode
+
+ // GSM 04.08 10.5.2.25a Packet Channel Description
+ bitvec_write_field(dest, wp,0x1,5); // Channel type
+ bitvec_write_field(dest, wp,ts,3); // TN
+ bitvec_write_field(dest, wp,tsc,3); // TSC
+ bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion
+ bitvec_write_field(dest, wp,arfcn,10); // ARFCN
+
+ //10.5.2.30 Request Reference
+ bitvec_write_field(dest, wp,ra,8); // RA
+ bitvec_write_field(dest, wp,(ref_fn / (26 * 51)) % 32,5); // T1'
+ bitvec_write_field(dest, wp,ref_fn % 51,6); // T3
+ bitvec_write_field(dest, wp,ref_fn % 26,5); // T2
+
+ // 10.5.2.40 Timing Advance
+ bitvec_write_field(dest, wp,0x0,2); // spare
+ bitvec_write_field(dest, wp,ta,6); // Timing Advance value
+
+ // No mobile allocation in non-hopping systems.
+ // A zero-length LV. Just write L=0.
+ bitvec_write_field(dest, wp,0,8);
+
+ if ((wp % 8)) {
+ LOGP(DRLCMACUL, LOGL_ERROR, "Length of IMM.ASS without rest "
+ "octets is not multiple of 8 bits, PLEASE FIX!\n");
+ exit (0);
+ }
+ plen = wp / 8;
+
+ if (downlink)
+ {
+ // GSM 04.08 10.5.2.16 IA Rest Octets
+ bitvec_write_field(dest, wp, 3, 2); // "HH"
+ bitvec_write_field(dest, wp, 1, 2); // "01" Packet Downlink Assignment
+ bitvec_write_field(dest, wp,tlli,32); // TLLI
+ bitvec_write_field(dest, wp,0x1,1); // switch TFI : on
+ bitvec_write_field(dest, wp,tfi,5); // TFI
+ bitvec_write_field(dest, wp,0x0,1); // RLC acknowledged mode
+ if (alpha) {
+ bitvec_write_field(dest, wp,0x1,1); // ALPHA = present
+ bitvec_write_field(dest, wp,alpha,4); // ALPHA
+ } else {
+ bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
+ }
+ bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
+ bitvec_write_field(dest, wp,polling,1); // Polling Bit
+ bitvec_write_field(dest, wp,!polling,1); // TA_VALID ???
+ if (ta_idx < 0) {
+ bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
+ } else {
+ bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
+ bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX
+ }
+ if (polling) {
+ bitvec_write_field(dest, wp,0x1,1); // TBF Starting TIME present
+ bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1'
+ bitvec_write_field(dest, wp,fn % 51,6); // T3
+ bitvec_write_field(dest, wp,fn % 26,5); // T2
+ } else {
+ bitvec_write_field(dest, wp,0x0,1); // TBF Starting TIME present
+ }
+ bitvec_write_field(dest, wp,0x0,1); // P0 not present
+// bitvec_write_field(dest, wp,0x1,1); // P0 not present
+// bitvec_write_field(dest, wp,0xb,4);
+ }
+ else
+ {
+ // GMS 04.08 10.5.2.37b 10.5.2.16
+ bitvec_write_field(dest, wp, 3, 2); // "HH"
+ bitvec_write_field(dest, wp, 0, 2); // "0" Packet Uplink Assignment
+ if (single_block) {
+ bitvec_write_field(dest, wp, 0, 1); // Block Allocation : Single Block Allocation
+ if (alpha) {
+ bitvec_write_field(dest, wp,0x1,1); // ALPHA = present
+ bitvec_write_field(dest, wp,alpha,4); // ALPHA = present
+ } else
+ bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
+ bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
+ if (ta_idx < 0) {
+ bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
+ } else {
+ bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
+ bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX
+ }
+ bitvec_write_field(dest, wp, 1, 1); // TBF_STARTING_TIME_FLAG
+ bitvec_write_field(dest, wp,(fn / (26 * 51)) % 32,5); // T1'
+ bitvec_write_field(dest, wp,fn % 51,6); // T3
+ bitvec_write_field(dest, wp,fn % 26,5); // T2
+ } else {
+ bitvec_write_field(dest, wp, 1, 1); // Block Allocation : Not Single Block Allocation
+ bitvec_write_field(dest, wp, tfi, 5); // TFI_ASSIGNMENT Temporary Flow Identity
+ bitvec_write_field(dest, wp, 0, 1); // POLLING
+ bitvec_write_field(dest, wp, 0, 1); // ALLOCATION_TYPE: dynamic
+ bitvec_write_field(dest, wp, usf, 3); // USF
+ bitvec_write_field(dest, wp, 0, 1); // USF_GRANULARITY
+ bitvec_write_field(dest, wp, 0, 1); // "0" power control: Not Present
+ bitvec_write_field(dest, wp, bts->initial_cs_ul-1, 2); // CHANNEL_CODING_COMMAND
+ bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING
+ if (alpha) {
+ bitvec_write_field(dest, wp,0x1,1); // ALPHA = present
+ bitvec_write_field(dest, wp,alpha,4); // ALPHA
+ } else
+ bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
+ bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
+ /* note: there is no choise for TAI and no starting time */
+ bitvec_write_field(dest, wp, 0, 1); // switch TIMING_ADVANCE_INDEX = off
+ bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG
+ }
+ }
+
+ return plen;
+}
+
+/* generate uplink assignment */
+void write_packet_uplink_assignment(
+ struct gprs_rlcmac_bts *bts,
+ bitvec * dest, uint8_t old_tfi,
+ uint8_t old_downlink, uint32_t tlli, uint8_t use_tlli,
+ struct gprs_rlcmac_tbf *tbf, uint8_t poll, uint8_t alpha,
+ uint8_t gamma, int8_t ta_idx)
+{
+ // TODO We should use our implementation of encode RLC/MAC Control messages.
+ unsigned wp = 0;
+ uint8_t ts;
+
+ bitvec_write_field(dest, wp,0x1,2); // Payload Type
+ bitvec_write_field(dest, wp,0x0,2); // Uplink block with TDMA framenumber (N+13)
+ bitvec_write_field(dest, wp,poll,1); // Suppl/Polling Bit
+ bitvec_write_field(dest, wp,0x0,3); // Uplink state flag
+ bitvec_write_field(dest, wp,0xa,6); // MESSAGE TYPE
+
+ bitvec_write_field(dest, wp,0x0,2); // Page Mode
+
+ bitvec_write_field(dest, wp,0x0,1); // switch PERSIST_LEVEL: off
+ if (use_tlli) {
+ bitvec_write_field(dest, wp,0x2,2); // switch TLLI : on
+ bitvec_write_field(dest, wp,tlli,32); // TLLI
+ } else {
+ bitvec_write_field(dest, wp,0x0,1); // switch TFI : on
+ bitvec_write_field(dest, wp,old_downlink,1); // 0=UPLINK TFI, 1=DL TFI
+ bitvec_write_field(dest, wp,old_tfi,5); // TFI
+ }
+
+ bitvec_write_field(dest, wp,0x0,1); // Message escape
+ bitvec_write_field(dest, wp,bts->initial_cs_ul-1, 2); // CHANNEL_CODING_COMMAND
+ bitvec_write_field(dest, wp,0x1,1); // TLLI_BLOCK_CHANNEL_CODING
+ bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on
+ bitvec_write_field(dest, wp,tbf->ta,6); // TIMING_ADVANCE_VALUE
+ if (ta_idx < 0) {
+ bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
+ } else {
+ bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
+ bitvec_write_field(dest, wp,ta_idx,4); // TIMING_ADVANCE_INDEX
+ }
+
+#if 1
+ bitvec_write_field(dest, wp,0x1,1); // Frequency Parameters information elements = present
+ bitvec_write_field(dest, wp,tbf->tsc,3); // Training Sequence Code (TSC)
+ bitvec_write_field(dest, wp,0x0,2); // ARFCN = present
+ bitvec_write_field(dest, wp,tbf->arfcn,10); // ARFCN
+#else
+ bitvec_write_field(dest, wp,0x0,1); // Frequency Parameters = off
+#endif
+
+ bitvec_write_field(dest, wp,0x1,2); // Dynamic Allocation
+
+ bitvec_write_field(dest, wp,0x0,1); // Extended Dynamic Allocation = off
+ bitvec_write_field(dest, wp,0x0,1); // P0 = off
+
+ bitvec_write_field(dest, wp,0x0,1); // USF_GRANULARITY
+ bitvec_write_field(dest, wp,0x1,1); // switch TFI : on
+ bitvec_write_field(dest, wp,tbf->tfi,5);// TFI
+
+ bitvec_write_field(dest, wp,0x0,1); //
+ bitvec_write_field(dest, wp,0x0,1); // TBF Starting Time = off
+ if (alpha || gamma) {
+ bitvec_write_field(dest, wp,0x1,1); // Timeslot Allocation with Power Control
+ bitvec_write_field(dest, wp,alpha,4); // ALPHA
+ } else
+ bitvec_write_field(dest, wp,0x0,1); // Timeslot Allocation
+
+ for (ts = 0; ts < 8; ts++) {
+ if (tbf->pdch[ts]) {
+ bitvec_write_field(dest, wp,0x1,1); // USF_TN(i): on
+ bitvec_write_field(dest, wp,tbf->dir.ul.usf[ts],3); // USF_TN(i)
+ if (alpha || gamma)
+ bitvec_write_field(dest, wp,gamma,5); // GAMMA power control parameter
+ } else
+ bitvec_write_field(dest, wp,0x0,1); // USF_TN(i): off
+ }
+// bitvec_write_field(dest, wp,0x0,1); // Measurement Mapping struct not present
+}
+
+
+/* generate downlink assignment */
+void write_packet_downlink_assignment(RlcMacDownlink_t * block, uint8_t old_tfi,
+ uint8_t old_downlink, struct gprs_rlcmac_tbf *tbf, uint8_t poll,
+ uint8_t alpha, uint8_t gamma, int8_t ta_idx, uint8_t ta_ts)
+{
+ // Packet downlink assignment TS 44.060 11.2.7
+
+ uint8_t tn;
+
+ block->PAYLOAD_TYPE = 0x1; // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
+ block->RRBP = 0x0; // N+13
+ block->SP = poll; // RRBP field is valid
+ block->USF = 0x0; // Uplink state flag
+
+ block->u.Packet_Downlink_Assignment.MESSAGE_TYPE = 0x2; // Packet Downlink Assignment
+ block->u.Packet_Downlink_Assignment.PAGE_MODE = 0x0; // Normal Paging
+
+ block->u.Packet_Downlink_Assignment.Exist_PERSISTENCE_LEVEL = 0x0; // PERSISTENCE_LEVEL: off
+
+ block->u.Packet_Downlink_Assignment.ID.UnionType = 0x0; // TFI = on
+ block->u.Packet_Downlink_Assignment.ID.u.Global_TFI.UnionType = old_downlink; // 0=UPLINK TFI, 1=DL TFI
+ block->u.Packet_Downlink_Assignment.ID.u.Global_TFI.u.UPLINK_TFI = old_tfi; // TFI
+
+ block->u.Packet_Downlink_Assignment.MAC_MODE = 0x0; // Dynamic Allocation
+ block->u.Packet_Downlink_Assignment.RLC_MODE = 0x0; // RLC acknowledged mode
+ block->u.Packet_Downlink_Assignment.CONTROL_ACK = old_downlink; // NW establishes no new DL TBF for the MS with running timer T3192
+ block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION = 0; // timeslot(s)
+ for (tn = 0; tn < 8; tn++) {
+ if (tbf->pdch[tn])
+ block->u.Packet_Downlink_Assignment.TIMESLOT_ALLOCATION |= 0x80 >> tn; // timeslot(s)
+ }
+
+ block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_TIMING_ADVANCE_VALUE = 0x1; // TIMING_ADVANCE_VALUE = on
+ block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_VALUE = tbf->ta; // TIMING_ADVANCE_VALUE
+ if (ta_idx < 0) {
+ block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x0; // TIMING_ADVANCE_INDEX = off
+ } else {
+ block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x1; // TIMING_ADVANCE_INDEX = on
+ block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_INDEX = ta_idx; // TIMING_ADVANCE_INDEX
+ block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.TIMING_ADVANCE_TIMESLOT_NUMBER = ta_ts; // TIMING_ADVANCE_TS
+ }
+
+ block->u.Packet_Downlink_Assignment.Exist_P0_and_BTS_PWR_CTRL_MODE = 0x0; // POWER CONTROL = off
+
+ block->u.Packet_Downlink_Assignment.Exist_Frequency_Parameters = 0x1; // Frequency Parameters = on
+ block->u.Packet_Downlink_Assignment.Frequency_Parameters.TSC = tbf->tsc; // Training Sequence Code (TSC)
+ block->u.Packet_Downlink_Assignment.Frequency_Parameters.UnionType = 0x0; // ARFCN = on
+ block->u.Packet_Downlink_Assignment.Frequency_Parameters.u.ARFCN = tbf->arfcn; // ARFCN
+
+ block->u.Packet_Downlink_Assignment.Exist_DOWNLINK_TFI_ASSIGNMENT = 0x1; // DOWNLINK TFI ASSIGNMENT = on
+ block->u.Packet_Downlink_Assignment.DOWNLINK_TFI_ASSIGNMENT = tbf->tfi; // TFI
+
+ block->u.Packet_Downlink_Assignment.Exist_Power_Control_Parameters = 0x1; // Power Control Parameters = on
+ block->u.Packet_Downlink_Assignment.Power_Control_Parameters.ALPHA = alpha; // ALPHA
+
+ for (tn = 0; tn < 8; tn++)
+ {
+ if (tbf->pdch[tn])
+ {
+ block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].Exist = 0x1; // Slot[i] = on
+ block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].GAMMA_TN = gamma; // GAMMA_TN
+ }
+ else
+ {
+ block->u.Packet_Downlink_Assignment.Power_Control_Parameters.Slot[tn].Exist = 0x0; // Slot[i] = off
+ }
+ }
+
+ block->u.Packet_Downlink_Assignment.Exist_TBF_Starting_Time = 0x0; // TBF Starting TIME = off
+ block->u.Packet_Downlink_Assignment.Exist_Measurement_Mapping = 0x0; // Measurement_Mapping = off
+ block->u.Packet_Downlink_Assignment.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off
+}
+
+/* generate paging request */
+int write_paging_request(bitvec * dest, uint8_t *ptmsi, uint16_t ptmsi_len)
+{
+ unsigned wp = 0;
+ int plen;
+
+ bitvec_write_field(dest, wp,0x0,4); // Skip Indicator
+ bitvec_write_field(dest, wp,0x6,4); // Protocol Discriminator
+ bitvec_write_field(dest, wp,0x21,8); // Paging Request Message Type
+
+ bitvec_write_field(dest, wp,0x0,4); // Page Mode
+ bitvec_write_field(dest, wp,0x0,4); // Channel Needed
+
+ // Mobile Identity
+ bitvec_write_field(dest, wp,ptmsi_len+1,8); // Mobile Identity length
+ bitvec_write_field(dest, wp,0xf,4); // unused
+ bitvec_write_field(dest, wp,0x4,4); // PTMSI type
+ for (int i = 0; i < ptmsi_len; i++)
+ {
+ bitvec_write_field(dest, wp,ptmsi[i],8); // PTMSI
+ }
+ if ((wp % 8)) {
+ LOGP(DRLCMACUL, LOGL_ERROR, "Length of PAG.REQ without rest "
+ "octets is not multiple of 8 bits, PLEASE FIX!\n");
+ exit (0);
+ }
+ plen = wp / 8;
+ bitvec_write_field(dest, wp,0x0,1); // "L" NLN(PCH) = off
+ bitvec_write_field(dest, wp,0x0,1); // "L" Priority1 = off
+ bitvec_write_field(dest, wp,0x1,1); // "L" Priority2 = off
+ bitvec_write_field(dest, wp,0x0,1); // "L" Group Call information = off
+ bitvec_write_field(dest, wp,0x0,1); // "H" Packet Page Indication 1 = packet paging procedure
+ bitvec_write_field(dest, wp,0x1,1); // "H" Packet Page Indication 2 = packet paging procedure
+
+ return plen;
+}
+
+/* generate uplink ack */
+void write_packet_uplink_ack(struct gprs_rlcmac_bts *bts,
+ RlcMacDownlink_t * block, struct gprs_rlcmac_tbf *tbf,
+ uint8_t final)
+{
+ // Packet Uplink Ack/Nack TS 44.060 11.2.28
+
+ char show_v_n[65];
+
+ uint8_t rbb = 0;
+ uint16_t i, bbn;
+ uint16_t mod_sns_half = (tbf->sns >> 1) - 1;
+ char bit;
+
+ LOGP(DRLCMACUL, LOGL_DEBUG, "Sending Ack/Nack for TBF=%d "
+ "(final=%d)\n", tbf->tfi, final);
+
+ block->PAYLOAD_TYPE = 0x1; // RLC/MAC control block that does not include the optional octets of the RLC/MAC control header
+ block->RRBP = 0x0; // N+13
+ block->SP = final; // RRBP field is valid, if it is final ack
+ block->USF = 0x0; // Uplink state flag
+
+ block->u.Packet_Uplink_Ack_Nack.MESSAGE_TYPE = 0x9; // Packet Downlink Assignment
+ block->u.Packet_Uplink_Ack_Nack.PAGE_MODE = 0x0; // Normal Paging
+ block->u.Packet_Uplink_Ack_Nack.UPLINK_TFI = tbf->tfi; // Uplink TFI
+
+ block->u.Packet_Uplink_Ack_Nack.UnionType = 0x0; // PU_AckNack_GPRS = on
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.CHANNEL_CODING_COMMAND = bts->initial_cs_ul - 1; // CS1
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.FINAL_ACK_INDICATION = final; // FINAL ACK INDICATION
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.STARTING_SEQUENCE_NUMBER = tbf->dir.ul.v_r; // STARTING_SEQUENCE_NUMBER
+ // RECEIVE_BLOCK_BITMAP
+ for (i = 0, bbn = (tbf->dir.ul.v_r - 64) & mod_sns_half; i < 64;
+ i++, bbn = (bbn + 1) & mod_sns_half) {
+ bit = tbf->dir.ul.v_n[bbn];
+ if (bit == 0)
+ bit = ' ';
+ show_v_n[i] = bit;
+ if (bit == 'R')
+ rbb = (rbb << 1)|1;
+ else
+ rbb = (rbb << 1);
+ if((i%8) == 7)
+ {
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.RECEIVED_BLOCK_BITMAP[i/8] = rbb;
+ rbb = 0;
+ }
+ }
+ show_v_n[64] = '\0';
+ LOGP(DRLCMACUL, LOGL_DEBUG, "- V(N): \"%s\" R=Received "
+ "N=Not-Received\n", show_v_n);
+
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.UnionType = 0x0; // Fixed Allocation Dummy = on
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.u.FixedAllocationDummy = 0x0; // Fixed Allocation Dummy
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Exist_AdditionsR99 = 0x0; // AdditionsR99 = off
+
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_CONTENTION_RESOLUTION_TLLI = 0x1;
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.CONTENTION_RESOLUTION_TLLI = tbf->tlli;
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Packet_Timing_Advance = 0x0;
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Extension_Bits = 0x0;
+ block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Common_Uplink_Ack_Nack_Data.Exist_Power_Control_Parameters = 0x0;
+}
+
+unsigned write_packet_paging_request(bitvec * dest)
+{
+ unsigned wp = 0;
+
+ bitvec_write_field(dest, wp,0x1,2); // Payload Type
+ bitvec_write_field(dest, wp,0x0,3); // No polling
+ bitvec_write_field(dest, wp,0x0,3); // Uplink state flag
+ bitvec_write_field(dest, wp,0x22,6); // MESSAGE TYPE
+
+ bitvec_write_field(dest, wp,0x0,2); // Page Mode
+
+ bitvec_write_field(dest, wp,0x0,1); // No PERSISTENCE_LEVEL
+ bitvec_write_field(dest, wp,0x0,1); // No NLN
+
+ return wp;
+}
+
+unsigned write_repeated_page_info(bitvec * dest, unsigned& wp, uint8_t len,
+ uint8_t *identity, uint8_t chan_needed)
+{
+ bitvec_write_field(dest, wp,0x1,1); // Repeated Page info exists
+
+ bitvec_write_field(dest, wp,0x1,1); // RR connection paging
+
+ if ((identity[0] & 0x07) == 4) {
+ bitvec_write_field(dest, wp,0x0,1); // TMSI
+ identity++;
+ len--;
+ } else {
+ bitvec_write_field(dest, wp,0x0,1); // MI
+ bitvec_write_field(dest, wp,len,4); // MI len
+ }
+ while (len) {
+ bitvec_write_field(dest, wp,*identity++,8); // MI data
+ len--;
+ }
+ bitvec_write_field(dest, wp,chan_needed,2); // CHANNEL_NEEDED
+ bitvec_write_field(dest, wp,0x0,1); // No eMLPP_PRIORITY
+
+ return wp;
+}
+