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osmo-pcu
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Moved all bitvector code to seperate file 

This is required to remove C++ from other code.
This commit is contained in:
Andreas Eversberg 2012-07-26 10:50:23 +02:00
parent 08e93cdc3f
commit fc1dfd8eef
6 changed files with 151 additions and 681 deletions
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1
src/Makefile.am
View File

@ -30,6 +30,7 @@ libgprs_la_SOURCES = \
gprs_bssgp_pcu.cpp \
gprs_rlcmac.cpp \
gprs_rlcmac_data.cpp \
gprs_rlcmac_ctrl.cpp \
gprs_rlcmac_sched.cpp \
gsm_timer.cpp \
bitvector.cpp \

423
src/gprs_rlcmac.cpp
View File

@ -932,7 +932,6 @@ int gprs_rlcmac_rcv_block(uint8_t trx, uint8_t ts, uint8_t *data, uint8_t len,
uint32_t fn)
{
unsigned payload = data[0] >> 6;
bitvec *block;
int rc = 0;
switch (payload) {
@ -941,12 +940,7 @@ int gprs_rlcmac_rcv_block(uint8_t trx, uint8_t ts, uint8_t *data, uint8_t len,
len);
break;
case GPRS_RLCMAC_CONTROL_BLOCK:
block = bitvec_alloc(len);
if (!block)
return -ENOMEM;
bitvec_unpack(block, data);
rc = gprs_rlcmac_rcv_control_block(block, trx, ts, fn);
bitvec_free(block);
rc = gprs_rlcmac_rcv_control_block(trx, ts, fn, data, len);
break;
case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n");
@ -1052,421 +1046,6 @@ struct gprs_rlcmac_paging *gprs_rlcmac_dequeue_paging(
return pag;
}
struct msgb *gprs_rlcmac_send_packet_paging_request(
struct gprs_rlcmac_pdch *pdch)
{
struct gprs_rlcmac_paging *pag;
struct msgb *msg;
unsigned wp = 0, len;
/* no paging, no message */
pag = gprs_rlcmac_dequeue_paging(pdch);
if (!pag)
return NULL;
LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n");
/* alloc message */
msg = msgb_alloc(23, "pag ctrl block");
if (!msg)
return NULL;
bitvec *pag_vec = bitvec_alloc(23);
if (!pag_vec) {
msgb_free(msg);
return NULL;
}
wp = write_packet_paging_request(pag_vec);
/* loop until message is full */
while (pag) {
/* try to add paging */
if ((pag->identity_lv[1] & 0x07) == 4) {
/* TMSI */
LOGP(DRLCMAC, LOGL_DEBUG, "- TMSI=0x%08x\n",
ntohl(*((uint32_t *)(pag->identity_lv + 1))));
len = 1 + 1 + 1 + 32 + 2 + 1;
if (pag->identity_lv[0] != 5) {
LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with "
"MI != 5 octets!\n");
break;
}
} else {
/* MI */
LOGP(DRLCMAC, LOGL_DEBUG, "- MI=%s\n",
osmo_hexdump(pag->identity_lv + 1,
pag->identity_lv[0]));
len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1;
if (pag->identity_lv[0] > 8) {
LOGP(DRLCMAC, LOGL_ERROR, "Paging with "
"MI > 8 octets!\n");
break;
}
}
if (wp + len > 184) {
LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule "
"next time\n");
/* put back paging record, because does not fit */
llist_add_tail(&pag->list, &pdch->paging_list);
break;
}
write_repeated_page_info(pag_vec, wp, pag->identity_lv[0],
pag->identity_lv + 1, pag->chan_needed);
pag = gprs_rlcmac_dequeue_paging(pdch);
}
bitvec_pack(pag_vec, msgb_put(msg, 23));
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n");
decode_gsm_rlcmac_downlink(pag_vec, mac_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n");
bitvec_free(pag_vec);
talloc_free(mac_control_block);
return msg;
}
// GSM 04.08 9.1.18 Immediate assignment
int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra,
uint32_t 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 poll_fn)
{
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,(fn / (26 * 51)) % 32,5); // T1'
bitvec_write_field(dest, wp,fn % 51,6); // T3
bitvec_write_field(dest, wp,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
bitvec_write_field(dest, wp,0x0,1); // ALPHA = not present
bitvec_write_field(dest, wp,0x0,5); // GAMMA power control parameter
bitvec_write_field(dest, wp,polling,1); // Polling Bit
bitvec_write_field(dest, wp,!polling,1); // TA_VALID ???
bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
bitvec_write_field(dest, wp,0x0,4); // TIMING_ADVANCE_INDEX
if (polling) {
bitvec_write_field(dest, wp,0x1,1); // TBF Starting TIME present
bitvec_write_field(dest, wp,(poll_fn / (26 * 51)) % 32,5); // T1'
bitvec_write_field(dest, wp,poll_fn % 51,6); // T3
bitvec_write_field(dest, wp,poll_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
{
struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts;
// 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
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-1, 2); // CHANNEL_CODING_COMMAND
bitvec_write_field(dest, wp, 1, 1); // TLLI_BLOCK_CHANNEL_CODING
bitvec_write_field(dest, wp, 1 , 1); // "1" Alpha : Present
bitvec_write_field(dest, wp, 0, 4); // Alpha
bitvec_write_field(dest, wp, 0, 5); // Gamma
bitvec_write_field(dest, wp, 0, 1); // TIMING_ADVANCE_INDEX_FLAG
bitvec_write_field(dest, wp, 0, 1); // TBF_STARTING_TIME_FLAG
}
return plen;
}
/* generate uplink assignment */
void write_packet_uplink_assignment(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)
{
// TODO We should use our implementation of encode RLC/MAC Control messages.
struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts;
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-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
bitvec_write_field(dest, wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
#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
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)
} 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)
{
// 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
block->u.Packet_Downlink_Assignment.Packet_Timing_Advance.Exist_IndexAndtimeSlot = 0x0; // TIMING_ADVANCE_INDEX = off
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 = 0x0; // 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 = 0x0; // 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 uplink ack */
void write_packet_uplink_ack(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];
struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts;
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 - 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;
}
/* Send Uplink unit-data to SGSN. */
int gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf)
{

29
src/gprs_rlcmac.h
View File

@ -21,7 +21,6 @@
#define GPRS_RLCMAC_H
#ifdef __cplusplus
#include <bitvector.h>
#include <gsm_rlcmac.h>
#include <gsm_timer.h>
@ -257,23 +256,6 @@ enum gprs_rlcmac_block_type {
int gprs_rlcmac_rcv_block(uint8_t trx, uint8_t ts, uint8_t *data, uint8_t len,
uint32_t fn);
int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra,
uint32_t 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 poll_fn);
void write_packet_uplink_assignment(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);
void write_packet_downlink_assignment(RlcMacDownlink_t * block, uint8_t old_tfi,
uint8_t old_downlink, struct gprs_rlcmac_tbf *tbf, uint8_t poll);
void write_packet_uplink_ack(RlcMacDownlink_t * block, struct gprs_rlcmac_tbf *tbf,
uint8_t final);
int gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf);
void tbf_timer_cb(void *_tbf);
@ -282,8 +264,10 @@ int gprs_rlcmac_poll_timeout(struct gprs_rlcmac_tbf *tbf);
int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta);
int gprs_rlcmac_rcv_control_block(bitvec *rlc_block, uint8_t trx, uint8_t ts,
uint32_t fn);
int gprs_rlcmac_rcv_control_block(uint8_t trx, uint8_t ts, uint32_t fn,
uint8_t *data, uint8_t len);
int gprs_rlcmac_rcv_downlink_ack(uint8_t trx, uint8_t ts, uint32_t fn, uint16_t tfi, uint8_t final, uint8_t ssn, uint8_t *rbb, uint8_t request);
struct msgb *gprs_rlcmac_send_packet_uplink_assignment(
struct gprs_rlcmac_tbf *tbf, uint32_t fn);
@ -297,11 +281,6 @@ void gprs_rlcmac_trigger_downlink_assignment(struct gprs_rlcmac_tbf *tbf,
int gprs_rlcmac_downlink_ack(struct gprs_rlcmac_tbf *tbf, uint8_t final,
uint8_t ssn, uint8_t *rbb);
unsigned write_packet_paging_request(bitvec * dest);
unsigned write_repeated_page_info(bitvec * dest, unsigned& wp, uint8_t len,
uint8_t *identity, uint8_t chan_needed);
int gprs_rlcmac_rcv_data_block_acknowledged(uint8_t trx, uint8_t ts,
uint8_t *data, uint8_t len);

361
src/gprs_rlcmac_data.cpp
View File

@ -20,6 +20,7 @@
#include <gprs_bssgp_pcu.h>
#include <gprs_rlcmac.h>
#include <gprs_rlcmac_ctrl.h>
#include <pcu_l1_if.h>
extern void *tall_pcu_ctx;
@ -132,172 +133,128 @@ int gprs_rlcmac_poll_timeout(struct gprs_rlcmac_tbf *tbf)
return 0;
}
/* Received Uplink RLC control block. */
int gprs_rlcmac_rcv_control_block(bitvec *rlc_block, uint8_t trx, uint8_t ts,
uint32_t fn)
int gprs_rlcmac_rcv_control_ack(uint8_t trx, uint8_t ts, uint32_t fn,
uint32_t tlli)
{
struct gprs_rlcmac_tbf *tbf;
uint8_t tfi;
tbf = tbf_by_poll_fn(fn, trx, ts);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
"unknown FN=%u TLL=0x%08x (TRX %d TS %d)\n",
fn, tlli, trx, ts);
return -EINVAL;
}
tfi = tbf->tfi;
if (tlli != tbf->tlli) {
LOGP(DRLCMAC, LOGL_INFO, "Phone changed TLLI to "
"0x%08x\n", tlli);
tbf->tlli = tlli;
}
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Control Ack\n", tbf->tfi, tbf->tlli);
tbf->poll_state = GPRS_RLCMAC_POLL_NONE;
/* check if this control ack belongs to packet uplink ack */
if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) {
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE;
tbf_free(tbf);
return 0;
}
if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) {
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] DOWNLINK ASSIGNED TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
if (tbf->direction == GPRS_RLCMAC_UL_TBF)
tbf = tbf_by_tlli(tbf->tlli,
GPRS_RLCMAC_DL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL "
"TBF is gone\n");
return -EIO;
}
tbf_new_state(tbf, GPRS_RLCMAC_FLOW);
tbf_assign_control_ts(tbf);
return 0;
}
if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) {
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [DOWNLINK] UPLINK ASSIGNED TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE;
if (tbf->direction == GPRS_RLCMAC_DL_TBF)
tbf = tbf_by_tlli(tbf->tlli,
GPRS_RLCMAC_UL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL "
"TBF is gone\n");
return -EIO;
}
tbf_new_state(tbf, GPRS_RLCMAC_FLOW);
tbf_assign_control_ts(tbf);
return 0;
}
LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK "
"at no request\n");
return EINVAL;
}
int gprs_rlcmac_rcv_downlink_ack(uint8_t trx, uint8_t ts, uint32_t fn, uint16_t tfi, uint8_t final, uint8_t ssn, uint8_t *rbb, uint8_t request)
{
struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts;
int8_t tfi = 0; /* must be signed */
uint32_t tlli = 0;
struct gprs_rlcmac_tbf *tbf;
int rc;
RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t);
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n");
decode_gsm_rlcmac_uplink(rlc_block, ul_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n");
switch (ul_control_block->u.MESSAGE_TYPE) {
case MT_PACKET_CONTROL_ACK:
tlli = ul_control_block->u.Packet_Control_Acknowledgement.TLLI;
tbf = tbf_by_poll_fn(fn, trx, ts);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
"unknown FN=%u TLL=0x%08x (TRX %d TS %d)\n",
fn, tlli, trx, ts);
break;
}
tfi = tbf->tfi;
if (tlli != tbf->tlli) {
LOGP(DRLCMAC, LOGL_INFO, "Phone changed TLLI to "
"0x%08x\n", tlli);
tbf->tlli = tlli;
}
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Control Ack\n", tbf->tfi, tbf->tlli);
tbf->poll_state = GPRS_RLCMAC_POLL_NONE;
/* check if this control ack belongs to packet uplink ack */
if (tbf->ul_ack_state == GPRS_RLCMAC_UL_ACK_WAIT_ACK) {
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] END TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
tbf->ul_ack_state = GPRS_RLCMAC_UL_ACK_NONE;
tbf_free(tbf);
break;
}
if (tbf->dl_ass_state == GPRS_RLCMAC_DL_ASS_WAIT_ACK) {
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] DOWNLINK ASSIGNED TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
tbf->dl_ass_state = GPRS_RLCMAC_DL_ASS_NONE;
if (tbf->direction == GPRS_RLCMAC_UL_TBF)
tbf = tbf_by_tlli(tbf->tlli,
GPRS_RLCMAC_DL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL "
"TBF is gone\n");
break;
}
tbf_new_state(tbf, GPRS_RLCMAC_FLOW);
tbf_assign_control_ts(tbf);
break;
}
if (tbf->ul_ass_state == GPRS_RLCMAC_UL_ASS_WAIT_ACK) {
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [DOWNLINK] UPLINK ASSIGNED TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli);
tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE;
if (tbf->direction == GPRS_RLCMAC_DL_TBF)
tbf = tbf_by_tlli(tbf->tlli,
GPRS_RLCMAC_UL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL "
"TBF is gone\n");
break;
}
tbf_new_state(tbf, GPRS_RLCMAC_FLOW);
tbf_assign_control_ts(tbf);
break;
}
LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK "
"at no request\n");
break;
case MT_PACKET_DOWNLINK_ACK_NACK:
tfi = ul_control_block->u.Packet_Downlink_Ack_Nack.DOWNLINK_TFI;
tbf = tbf_by_poll_fn(fn, trx, ts);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
"unknown FN=%u TBF=%d (TRX %d TS %d)\n",
fn, tfi, trx, ts);
break;
}
/* reset N3105 */
tbf->dir.dl.n3105 = 0;
/* stop timer T3191 */
tbf_timer_stop(tbf);
tlli = tbf->tlli;
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Downlink Ack/Nack\n", tbf->tfi, tbf->tlli);
tbf->poll_state = GPRS_RLCMAC_POLL_NONE;
rc = gprs_rlcmac_downlink_ack(tbf,
ul_control_block->u.Packet_Downlink_Ack_Nack.Ack_Nack_Description.FINAL_ACK_INDICATION,
ul_control_block->u.Packet_Downlink_Ack_Nack.Ack_Nack_Description.STARTING_SEQUENCE_NUMBER,
ul_control_block->u.Packet_Downlink_Ack_Nack.Ack_Nack_Description.RECEIVED_BLOCK_BITMAP);
if (rc == 1) {
tbf_free(tbf);
break;
}
/* check for channel request */
if (ul_control_block->u.Packet_Downlink_Ack_Nack.Exist_Channel_Request_Description) {
uint8_t trx, ts;
struct gprs_rlcmac_tbf *ul_tbf;
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack "
"message, so we provide one:\n");
uplink_request:
/* create new TBF, use sme TRX as DL TBF */
tfi = tfi_alloc(GPRS_RLCMAC_UL_TBF, &trx, &ts, tbf->trx, tbf->first_ts);
if (tfi < 0) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
break;
}
/* use multislot class of downlink TBF */
ul_tbf = tbf_alloc(tbf, GPRS_RLCMAC_UL_TBF, tfi, trx,
ts, tbf->ms_class, 0);
if (!ul_tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
break;
}
ul_tbf->tlli = tbf->tlli;
ul_tbf->tlli_valid = 1; /* no contention resolution */
ul_tbf->dir.ul.contention_resolution_done = 1;
ul_tbf->ta = tbf->ta; /* use current TA */
tbf_new_state(ul_tbf, GPRS_RLCMAC_ASSIGN);
tbf_timer_start(ul_tbf, 3169, bts->t3169, 0);
/* schedule uplink assignment */
tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS;
}
break;
case MT_PACKET_RESOURCE_REQUEST:
if (ul_control_block->u.Packet_Resource_Request.ID.UnionType) {
tlli = ul_control_block->u.Packet_Resource_Request.ID.u.TLLI;
tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TLLI=0x%08x\n", tlli);
break;
}
tfi = tbf->tfi;
} else {
if (ul_control_block->u.Packet_Resource_Request.ID.u.Global_TFI.UnionType) {
tfi = ul_control_block->u.Packet_Resource_Request.ID.u.Global_TFI.u.DOWNLINK_TFI;
tbf = tbf_by_tfi(tfi, trx, ts, GPRS_RLCMAC_DL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TBF=%d\n", tlli);
break;
}
} else {
tfi = ul_control_block->u.Packet_Resource_Request.ID.u.Global_TFI.u.UPLINK_TFI;
tbf = tbf_by_tfi(tfi, trx, ts, GPRS_RLCMAC_UL_TBF);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TBF=%d\n", tlli);
break;
}
}
tlli = tbf->tlli;
}
LOGP(DRLCMAC, LOGL_ERROR, "RX: [PCU <- BTS] %s TFI: %u TLLI: 0x%08x FIXME: Packet ressource request\n", (tbf->direction == GPRS_RLCMAC_UL_TBF) ? "UL" : "DL", tbf->tfi, tbf->tlli);
break;
default:
LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] unknown control block received\n");
tbf = tbf_by_poll_fn(fn, trx, ts);
if (!tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
"unknown FN=%u TBF=%d (TRX %d TS %d)\n",
fn, tfi, trx, ts);
return -EINVAL;
}
talloc_free(ul_control_block);
return 1;
/* reset N3105 */
tbf->dir.dl.n3105 = 0;
/* stop timer T3191 */
tbf_timer_stop(tbf);
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u TLLI: 0x%08x Packet Downlink Ack/Nack\n", tbf->tfi, tbf->tlli);
tbf->poll_state = GPRS_RLCMAC_POLL_NONE;
rc = gprs_rlcmac_downlink_ack(tbf, final, ssn, rbb);
if (rc == 1) {
tbf_free(tbf);
return 0;
}
/* check for channel request */
if (request) {
uint8_t trx, ts;
struct gprs_rlcmac_tbf *ul_tbf;
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack "
"message, so we provide one:\n");
/* create new TBF, use sme TRX as DL TBF */
tfi = tfi_alloc(GPRS_RLCMAC_UL_TBF, &trx, &ts, tbf->trx, tbf->first_ts);
if (tfi < 0) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
return -EIO;
}
/* use multislot class of downlink TBF */
ul_tbf = tbf_alloc(tbf, GPRS_RLCMAC_UL_TBF, tfi, trx,
ts, tbf->ms_class, 0);
if (!ul_tbf) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
return -EIO;
}
ul_tbf->tlli = tbf->tlli;
ul_tbf->tlli_valid = 1; /* no contention resolution */
ul_tbf->dir.ul.contention_resolution_done = 1;
ul_tbf->ta = tbf->ta; /* use current TA */
tbf_new_state(ul_tbf, GPRS_RLCMAC_ASSIGN);
tbf_timer_start(ul_tbf, 3169, bts->t3169, 0);
/* schedule uplink assignment */
tbf->ul_ass_state = GPRS_RLCMAC_UL_ASS_SEND_ASS;
}
return 0;
}
#ifdef DEBUG_DL_ASS_IDLE
@ -567,22 +524,9 @@ struct msgb *gprs_rlcmac_send_uplink_ack(struct gprs_rlcmac_tbf *tbf,
return NULL;
}
msg = msgb_alloc(23, "rlcmac_ul_ack");
msg = write_packet_uplink_ack(tbf, final);
if (!msg)
return NULL;
bitvec *ack_vec = bitvec_alloc(23);
if (!ack_vec) {
msgb_free(msg);
return NULL;
}
bitvec_unhex(ack_vec,
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
write_packet_uplink_ack(mac_control_block, tbf, final);
encode_gsm_rlcmac_downlink(ack_vec, mac_control_block);
bitvec_pack(ack_vec, msgb_put(msg, 23));
bitvec_free(ack_vec);
talloc_free(mac_control_block);
/* now we must set this flag, so we are allowed to assign downlink
* TBF on PACCH. it is only allowed when TLLI is aknowledged. */
@ -824,28 +768,13 @@ struct msgb *gprs_rlcmac_send_packet_uplink_assignment(
return NULL;
}
msg = msgb_alloc(23, "rlcmac_ul_ass");
if (!msg)
return NULL;
LOGP(DRLCMAC, LOGL_INFO, "TBF: START TFI: %u TLLI: 0x%08x Packet Uplink Assignment (PACCH)\n", new_tbf->tfi, new_tbf->tlli);
bitvec *ass_vec = bitvec_alloc(23);
if (!ass_vec) {
msgb_free(msg);
return NULL;
}
bitvec_unhex(ass_vec,
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
write_packet_uplink_assignment(ass_vec, tbf->tfi,
msg = write_packet_uplink_assignment(tbf->tfi,
(tbf->direction == GPRS_RLCMAC_DL_TBF), 0, 0, new_tbf,
POLLING_ASSIGNMENT);
bitvec_pack(ass_vec, msgb_put(msg, 23));
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Uplink Assignment +++++++++++++++++++++++++\n");
decode_gsm_rlcmac_downlink(ass_vec, mac_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Uplink Assignment -------------------------\n");
bitvec_free(ass_vec);
talloc_free(mac_control_block);
if (!msg)
return NULL;
#if POLLING_ASSIGNMENT == 1
FIXME process does not work, also the acknowledgement is not checked.
@ -867,6 +796,8 @@ int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta)
struct gprs_rlcmac_tbf *tbf;
uint8_t trx, ts;
int8_t tfi; /* must be signed */
uint8_t imm_ass[23];
int rc;
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF on RACH, so we provide "
"one:\n");
@ -894,12 +825,11 @@ int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta)
LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [UPLINK] START TFI: %u\n", tbf->tfi);
LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] TFI: %u RACH qbit-ta=%d ra=%d, Fn=%d (%d,%d,%d)\n", tbf->tfi, qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26);
LOGP(DRLCMAC, LOGL_INFO, "TX: START TFI: %u Immediate Assignment Uplink (AGCH)\n", tbf->tfi);
bitvec *immediate_assignment = bitvec_alloc(22) /* without plen */;
bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
int plen = write_immediate_assignment(immediate_assignment, 0, ra, Fn, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc, tbf->tfi, tbf->dir.ul.usf[tbf->first_ts], 0, 0, 0);
pcu_l1if_tx_agch(immediate_assignment, plen);
bitvec_free(immediate_assignment);
rc = write_immediate_assignment_uplink(imm_ass, ra, Fn, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc, tbf->tfi, tbf->dir.ul.usf[tbf->first_ts], 0, 0);
if (rc < 0)
return rc;
pcu_l1if_tx_agch(imm_ass);
return 0;
}
@ -1450,28 +1380,12 @@ struct msgb *gprs_rlcmac_send_packet_downlink_assignment(
return NULL;
}
msg = msgb_alloc(23, "rlcmac_dl_ass");
if (!msg)
return NULL;
bitvec *ass_vec = bitvec_alloc(23);
if (!ass_vec) {
msgb_free(msg);
return NULL;
}
bitvec_unhex(ass_vec,
"2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
LOGP(DRLCMAC, LOGL_INFO, "TBF: START TFI: %u TLLI: 0x%08x Packet Downlink Assignment (PACCH)\n", new_tbf->tfi, new_tbf->tlli);
RlcMacDownlink_t * mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
write_packet_downlink_assignment(mac_control_block, tbf->tfi,
msg = write_packet_downlink_assignment(tbf->tfi,
(tbf->direction == GPRS_RLCMAC_DL_TBF), new_tbf,
POLLING_ASSIGNMENT);
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n");
encode_gsm_rlcmac_downlink(ass_vec, mac_control_block);
LOGPC(DCSN1, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Downlink Assignment -------------------------\n");
bitvec_pack(ass_vec, msgb_put(msg, 23));
bitvec_free(ass_vec);
talloc_free(mac_control_block);
if (!msg)
return NULL;
#if POLLING_ASSIGNMENT == 1
tbf->poll_state = GPRS_RLCMAC_POLL_SCHED;
@ -1489,14 +1403,17 @@ struct msgb *gprs_rlcmac_send_packet_downlink_assignment(
static void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf, uint8_t poll,
char *imsi)
{
uint8_t imm_ass[23];
int rc;
LOGP(DRLCMAC, LOGL_INFO, "TX: START TFI: %u TLLI: 0x%08x Immediate Assignment Downlink (PCH)\n", tbf->tfi, tbf->tlli);
bitvec *immediate_assignment = bitvec_alloc(22); /* without plen */
bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
/* use request reference that has maximum distance to current time,
* so the assignment will not conflict with possible RACH requests. */
int plen = write_immediate_assignment(immediate_assignment, 1, 125, (tbf->pdch[tbf->first_ts]->last_rts_fn + 21216) % 2715648, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc, tbf->tfi, 0, tbf->tlli, poll, tbf->poll_fn);
pcu_l1if_tx_pch(immediate_assignment, plen, imsi);
bitvec_free(immediate_assignment);
rc = write_immediate_assignment_downlink(imm_ass, 125, (tbf->pdch[tbf->first_ts]->last_rts_fn + 21216) % 2715648, tbf->ta, tbf->arfcn, tbf->first_ts, tbf->tsc, tbf->tfi, tbf->tlli, poll, tbf->poll_fn);
if (rc < 0)
return;
pcu_l1if_tx_pch(imm_ass, imsi);
}
/* depending on the current TBF, we assign on PACCH or AGCH */

14
src/pcu_l1_if.cpp
View File

@ -139,19 +139,14 @@ void pcu_l1if_tx_ptcch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn,
msgb_free(msg);
}
void pcu_l1if_tx_agch(bitvec * block, int plen)
void pcu_l1if_tx_agch(uint8_t *data)
{
uint8_t data[23]; /* prefix PLEN */
/* FIXME: why does OpenBTS has no PLEN and no fill in message? */
bitvec_pack(block, data + 1);
data[0] = (plen << 2) | 0x01;
pcu_tx_data_req(0, 0, PCU_IF_SAPI_AGCH, 0, 0, 0, data, 23);
}
void pcu_l1if_tx_pch(bitvec * block, int plen, char *imsi)
void pcu_l1if_tx_pch(uint8_t *data, char *imsi)
{
uint8_t data[23+3]; /* prefix PLEN */
uint8_t pch_data[23+3];
/* paging group */
if (!imsi || strlen(imsi) < 3)
@ -161,8 +156,7 @@ void pcu_l1if_tx_pch(bitvec * block, int plen, char *imsi)
data[1] = imsi[1];
data[2] = imsi[2];
bitvec_pack(block, data + 3+1);
data[3] = (plen << 2) | 0x01;
memcpy(pch_data + 3, data, 23);
pcu_tx_data_req(0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, data, 23+3);
}

4
src/pcu_l1_if.h
View File

@ -35,9 +35,9 @@ void pcu_l1if_tx_pdtch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr);
void pcu_l1if_tx_ptcch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr);
void pcu_l1if_tx_agch(bitvec * block, int len);
void pcu_l1if_tx_agch(uint8_t *data);
void pcu_l1if_tx_pch(bitvec * block, int plen, char *imsi);
void pcu_l1if_tx_pch(uint8_t *data, char *imsi);
int pcu_l1if_open(void);
void pcu_l1if_close(void);