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authorMax <msuraev@sysmocom.de>2018-02-19 17:17:28 +0100
committerMax <msuraev@sysmocom.de>2018-02-19 17:41:24 +0100
commit6dc90b8c86768a9b1beb429c610dcbae6488e21c (patch)
tree1fe643c594599ff24deb203e7f706f7dc92f5a69
parent2afec6dba54e4426664b3bd866a7fb5dc363b2c8 (diff)
Move PDCH-related functions into separate files
The PDCH class and corresponding functions are rather self-contained and independent from BTS implementation. Let's move them into separate file to make bts.cpp more manageable. As additional benefit it allow us to somewhat untangle all the different cross-dependent includes. Change-Id: Ie05e25361e6741a81b024679f9675c98d4923683 Related: OS#1539
-rw-r--r--src/Makefile.am2
-rw-r--r--src/bts.cpp900
-rw-r--r--src/bts.h121
-rw-r--r--src/gprs_bssgp_pcu.cpp1
-rw-r--r--src/gprs_rlcmac_sched.cpp1
-rw-r--r--src/gprs_rlcmac_ts_alloc.cpp1
-rw-r--r--src/osmo-bts-litecell15/lc15_l1_if.c1
-rw-r--r--src/osmo-bts-sysmo/sysmo_l1_if.c1
-rw-r--r--src/osmobts_sock.cpp1
-rw-r--r--src/pcu_l1_if.cpp1
-rw-r--r--src/pcu_vty.c2
-rw-r--r--src/pcu_vty_functions.cpp1
-rw-r--r--src/pdch.cpp963
-rw-r--r--src/pdch.h147
-rw-r--r--src/sba.cpp1
-rw-r--r--src/tbf.cpp1
16 files changed, 1125 insertions, 1020 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index 7d2a62e..b2f64f2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -54,6 +54,7 @@ libgprs_la_SOURCES = \
tbf_ul.cpp \
tbf_dl.cpp \
bts.cpp \
+ pdch.cpp \
poll_controller.cpp \
encoding.cpp \
sba.cpp \
@@ -85,6 +86,7 @@ noinst_HEADERS = \
mslot_class.h \
tbf.h \
bts.h \
+ pdch.h \
poll_controller.h \
encoding.h \
sba.h \
diff --git a/src/bts.cpp b/src/bts.cpp
index b0d92f0..47607df 100644
--- a/src/bts.cpp
+++ b/src/bts.cpp
@@ -29,6 +29,7 @@
#include <gprs_rlcmac.h>
#include <gprs_debug.h>
#include <cxx_linuxlist.h>
+#include <pdch.h>
extern "C" {
#include <osmocom/core/talloc.h>
@@ -825,801 +826,6 @@ GprsMs *BTS::ms_alloc(uint8_t ms_class, uint8_t egprs_ms_class)
return ms;
}
-/*
- * PDCH code below. TODO: move to a separate file
- */
-
-void gprs_rlcmac_pdch::enable()
-{
- /* TODO: Check if there are still allocated resources.. */
- INIT_LLIST_HEAD(&paging_list);
- m_is_enabled = 1;
-}
-
-void gprs_rlcmac_pdch::disable()
-{
- /* TODO.. kick free_resources once we know the TRX/TS we are on */
- m_is_enabled = 0;
-}
-
-void gprs_rlcmac_pdch::free_resources()
-{
- struct gprs_rlcmac_paging *pag;
-
- /* we are not enabled. there should be no resources */
- if (!is_enabled())
- return;
-
- /* kick all TBF on slot */
- gprs_rlcmac_tbf::free_all(this);
-
- /* flush all pending paging messages */
- while ((pag = dequeue_paging()))
- talloc_free(pag);
-
- trx->bts->sba()->free_resources(this);
-}
-
-struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging()
-{
- struct gprs_rlcmac_paging *pag;
-
- if (llist_empty(&paging_list))
- return NULL;
- pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list);
- llist_del(&pag->list);
-
- return pag;
-}
-
-struct msgb *gprs_rlcmac_pdch::packet_paging_request()
-{
- struct gprs_rlcmac_paging *pag;
- struct msgb *msg;
- unsigned wp = 0, len;
-
- /* no paging, no message */
- pag = dequeue_paging();
- if (!pag)
- return NULL;
-
- LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n");
-
- /* alloc message */
- msg = msgb_alloc(23, "pag ctrl block");
- if (!msg) {
- talloc_free(pag);
- return NULL;
- }
- bitvec *pag_vec = bitvec_alloc(23, tall_pcu_ctx);
- if (!pag_vec) {
- msgb_free(msg);
- talloc_free(pag);
- return NULL;
- }
- wp = Encoding::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");
- goto continue_next;
- }
- } 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");
- goto continue_next;
- }
- }
- 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, &paging_list);
- break;
- }
- Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0],
- pag->identity_lv + 1, pag->chan_needed);
-
-continue_next:
- talloc_free(pag);
- pag = dequeue_paging();
- }
-
- 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;
-}
-
-bool gprs_rlcmac_pdch::add_paging(uint8_t chan_needed, uint8_t *identity_lv)
-{
- struct gprs_rlcmac_paging *pag = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_paging);
- if (!pag)
- return false;
-
- pag->chan_needed = chan_needed;
- memcpy(pag->identity_lv, identity_lv, identity_lv[0] + 1);
-
- llist_add(&pag->list, &paging_list);
-
- return true;
-}
-
-void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn)
-{
- struct gprs_rlcmac_tbf *tbf, *new_tbf;
- uint32_t tlli = packet->TLLI;
- GprsMs *ms = bts()->ms_by_tlli(tlli);
- gprs_rlcmac_ul_tbf *ul_tbf;
-
- tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no);
- if (!tbf)
- tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
-
- if (!tbf) {
- LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
- "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n",
- fn, tlli, trx_no(), ts_no);
- if (ms)
- LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
- "unknown TBF corresponds to MS with IMSI %s, TA %d, "
- "uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n",
- ms->imsi(), ms->ta(),
- ms->ul_tbf() ? ms->ul_tbf()->tfi() : 0,
- ms->ul_tbf() ? ms->ul_tbf()->state_name() : "None",
- ms->dl_tbf() ? ms->dl_tbf()->tfi() : 0,
- ms->dl_tbf() ? ms->dl_tbf()->state_name() : "None");
- return;
- }
-
- /* Reset N3101 counter: */
- tbf->m_n3101 = 0;
-
- tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF);
-
- LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Control Ack\n");
- TBF_POLL_SCHED_UNSET(tbf);
-
- /* check if this control ack belongs to packet uplink ack */
- ul_tbf = as_ul_tbf(tbf);
- if (ul_tbf && ul_tbf->handle_ctrl_ack()) {
- LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n");
- if (ul_tbf->ctrl_ack_to_toggle())
- LOGPTBF(tbf, LOGL_NOTICE, "Recovered uplink ack for UL\n");
-
- tbf_free(tbf);
- return;
- }
- if (tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_WAIT_ACK)) {
- LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n");
- /* reset N3105 */
- tbf->n3105 = 0;
- TBF_SET_ASS_STATE_DL(tbf, GPRS_RLCMAC_DL_ASS_NONE);
-
- new_tbf = tbf->ms() ? tbf->ms()->dl_tbf() : NULL;
- if (!new_tbf) {
- LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL "
- "TBF is gone TLLI=0x%08x\n", tlli);
- return;
- }
- if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) &&
- tbf->direction == new_tbf->direction)
- tbf_free(tbf);
-
- if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_CCCH)) {
- /* We now know that the PACCH really existed */
- LOGPTBF(new_tbf, LOGL_INFO,
- "The TBF has been confirmed on the PACCH, "
- "changed type from CCCH to PACCH\n");
- TBF_ASS_TYPE_SET(new_tbf, GPRS_RLCMAC_FLAG_PACCH);
- }
- TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW);
- /* stop pending assignment timer */
- new_tbf->t_stop(T0, "control acked (DL-TBF)");
- if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ASS))
- LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered downlink assignment\n");
-
- tbf_assign_control_ts(new_tbf);
- return;
- }
- if (tbf->ul_ass_state_is(GPRS_RLCMAC_UL_ASS_WAIT_ACK)) {
- LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n");
- /* reset N3105 */
- tbf->n3105 = 0;
- TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_NONE);
-
- new_tbf = tbf->ms() ? tbf->ms()->ul_tbf() : NULL;
- if (!new_tbf) {
- LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL "
- "TBF is gone TLLI=0x%08x\n", tlli);
- return;
- }
- if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) &&
- tbf->direction == new_tbf->direction)
- tbf_free(tbf);
-
- TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW);
- if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_UL_ASS))
- LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered uplink assignment for UL\n");
-
- tbf_assign_control_ts(new_tbf);
- /* there might be LLC packets waiting in the queue, but the DL
- * TBF might have been released while the UL TBF has been
- * established */
- if (new_tbf->ms()->need_dl_tbf())
- new_tbf->establish_dl_tbf_on_pacch();
-
- return;
- }
- LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK "
- "at no request\n");
-}
-
-static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc)
-{
- static const int16_t rx_qual_map[] = {
- 0, /* 0,14 % */
- 0, /* 0,28 % */
- 1, /* 0,57 % */
- 1, /* 1,13 % */
- 2, /* 2,26 % */
- 5, /* 4,53 % */
- 9, /* 9,05 % */
- 18, /* 18,10 % */
- };
-
- meas->set_ms_rx_qual(rx_qual_map[
- OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1)
- ]);
-}
-
-static void get_meas(struct pcu_l1_meas *meas,
- const Packet_Resource_Request_t *qr)
-{
- unsigned i;
-
- meas->set_ms_c_value(qr->C_VALUE);
- if (qr->Exist_SIGN_VAR)
- meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */
-
- for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++)
- {
- if (qr->Slot[i].Exist) {
- LOGP(DRLCMAC, LOGL_INFO,
- "Packet resource request: i_level[%d] = %d\n",
- i, qr->Slot[i].I_LEVEL);
- meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL);
- }
- }
-}
-
-static void get_meas(struct pcu_l1_meas *meas,
- const Channel_Quality_Report_t *qr)
-{
- unsigned i;
-
- get_rx_qual_meas(meas, qr->RXQUAL);
- meas->set_ms_c_value(qr->C_VALUE);
- meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */
-
- for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++)
- {
- if (qr->Slot[i].Exist) {
- LOGP(DRLCMAC, LOGL_DEBUG,
- "Channel quality report: i_level[%d] = %d\n",
- i, qr->Slot[i].I_LEVEL_TN);
- meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL_TN);
- }
- }
-}
-
-static inline void sched_ul_ass_or_rej(BTS *bts, gprs_rlcmac_bts *bts_data, struct gprs_rlcmac_dl_tbf *tbf)
-{
- bts->channel_request_description();
-
- /* This call will register the new TBF with the MS on success */
- gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul(bts_data, tbf->trx->trx_no, tbf->ms_class(),
- tbf->ms()->egprs_ms_class(), tbf->tlli(), tbf->ta(), tbf->ms());
-
- /* schedule uplink assignment or reject */
- if (ul_tbf) {
- LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we provide one:\n");
- TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS);
- } else {
- LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n");
- TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS_REJ);
- }
-}
-
-void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn)
-{
- int8_t tfi = 0; /* must be signed */
- struct gprs_rlcmac_dl_tbf *tbf;
- int rc;
- struct pcu_l1_meas meas;
- int num_blocks;
- uint8_t bits_data[RLC_GPRS_WS/8];
- bitvec bits;
- int bsn_begin, bsn_end;
- char show_bits[RLC_GPRS_WS + 1];
-
- tfi = ack_nack->DOWNLINK_TFI;
- tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
- if (!tbf) {
- LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
- "unknown FN=%u TFI=%d (TRX %d TS %d)\n",
- fn, tfi, trx_no(), ts_no);
- return;
- }
- if (tbf->tfi() != tfi) {
- LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
- "wrong TFI=%d, ignoring!\n", tfi);
- return;
- }
-
- /* Reset N3101 counter: */
- tbf->m_n3101 = 0;
-
- if (tbf->handle_ack_nack())
- LOGPTBF(tbf, LOGL_NOTICE, "Recovered downlink ack\n");
-
- LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n");
-
- bits.data = bits_data;
- bits.data_len = sizeof(bits_data);
- bits.cur_bit = 0;
-
- num_blocks = Decoding::decode_gprs_acknack_bits(
- &ack_nack->Ack_Nack_Description, &bits,
- &bsn_begin, &bsn_end, tbf->window());
-
- LOGP(DRLCMAC, LOGL_DEBUG,
- "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), "
- "\"%s\"\n",
- ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER,
- bsn_begin, bsn_end, num_blocks,
- (Decoding::extract_rbb(&bits, show_bits), show_bits));
-
- rc = tbf->rcvd_dl_ack(
- ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION,
- bsn_begin, &bits);
- if (rc == 1) {
- tbf_free(tbf);
- return;
- }
- /* check for channel request */
- if (ack_nack->Exist_Channel_Request_Description)
- sched_ul_ass_or_rej(bts(), bts_data(), tbf);
-
- /* get measurements */
- if (tbf->ms()) {
- get_meas(&meas, &ack_nack->Channel_Quality_Report);
- tbf->ms()->update_l1_meas(&meas);
- }
-}
-
-void gprs_rlcmac_pdch::rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *ack_nack, uint32_t fn)
-{
- int8_t tfi = 0; /* must be signed */
- struct gprs_rlcmac_dl_tbf *tbf;
- struct pcu_l1_meas meas;
- int rc;
- int num_blocks;
- uint8_t bits_data[RLC_EGPRS_MAX_WS/8];
- char show_bits[RLC_EGPRS_MAX_WS + 1];
- bitvec bits;
- int bsn_begin, bsn_end;
-
- tfi = ack_nack->DOWNLINK_TFI;
- tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
- if (!tbf) {
- LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with "
- "unknown FN=%u TFI=%d (TRX %d TS %d)\n",
- fn, tfi, trx_no(), ts_no);
- return;
- }
- if (tbf->tfi() != tfi) {
- LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with "
- "wrong TFI=%d, ignoring!\n", tfi);
- return;
- }
-
- /* Reset N3101 counter: */
- tbf->m_n3101 = 0;
-
- if (tbf->handle_ack_nack())
- LOGPTBF(tbf, LOGL_NOTICE, "Recovered EGPRS downlink ack\n");
-
- LOGPTBF(tbf, LOGL_DEBUG,
- "RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n");
-
- LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: "
- "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, "
- "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n",
- (int)ack_nack->EGPRS_AckNack.UnionType,
- (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION,
- (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW,
- (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW,
- (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER,
- (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB,
- (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH,
- (void *)&ack_nack->EGPRS_AckNack.UnionType,
- (void *)&ack_nack->EGPRS_AckNack.Desc,
- (int)offsetof(EGPRS_AckNack_t, Desc),
- (int)offsetof(EGPRS_AckNack_w_len_t, Desc),
- tbf->window()->v_a(),
- tbf->window()->v_s(),
- osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB,
- sizeof(ack_nack->EGPRS_AckNack.Desc.URBB)));
-
- bits.data = bits_data;
- bits.data_len = sizeof(bits_data);
- bits.cur_bit = 0;
-
- num_blocks = Decoding::decode_egprs_acknack_bits(
- &ack_nack->EGPRS_AckNack.Desc, &bits,
- &bsn_begin, &bsn_end, tbf->window());
-
- LOGP(DRLCMAC, LOGL_DEBUG,
- "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), "
- "\"%s\"\n",
- ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER,
- bsn_begin, bsn_end, num_blocks,
- (Decoding::extract_rbb(&bits, show_bits), show_bits)
- );
-
- rc = tbf->rcvd_dl_ack(
- ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION,
- bsn_begin, &bits);
- if (rc == 1) {
- tbf_free(tbf);
- return;
- }
-
- /* check for channel request */
- if (ack_nack->Exist_ChannelRequestDescription)
- sched_ul_ass_or_rej(bts(), bts_data(), tbf);
-
- /* get measurements */
- if (tbf->ms()) {
- /* TODO: Implement Measurements parsing for EGPRS */
- /*
- get_meas(&meas, &ack_nack->Channel_Quality_Report);
- tbf->ms()->update_l1_meas(&meas);
- */
- }
-}
-
-void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn)
-{
- struct gprs_rlcmac_sba *sba;
-
- if (request->ID.UnionType) {
- struct gprs_rlcmac_ul_tbf *ul_tbf = NULL;
- struct gprs_rlcmac_dl_tbf *dl_tbf = NULL;
- uint32_t tlli = request->ID.u.TLLI;
- uint8_t ms_class = 0;
- uint8_t egprs_ms_class = 0;
- uint8_t ta = GSM48_TA_INVALID;
- struct pcu_l1_meas meas;
-
- GprsMs *ms = bts()->ms_by_tlli(tlli);
- /* Keep the ms, even if it gets idle temporarily */
- GprsMs::Guard guard(ms);
-
- if (ms) {
- ul_tbf = ms->ul_tbf();
- dl_tbf = ms->dl_tbf();
- ta = ms->ta();
- }
-
- /* We got a RACH so the MS was in packet idle mode and thus
- * didn't have any active TBFs */
- if (ul_tbf) {
- LOGPTBFUL(ul_tbf, LOGL_NOTICE,
- "Got RACH from TLLI=0x%08x while TBF still exists. Killing pending UL TBF\n",
- tlli);
- tbf_free(ul_tbf);
- ul_tbf = NULL;
- }
-
- if (dl_tbf) {
- LOGPTBFUL(dl_tbf, LOGL_NOTICE,
- "Got RACH from TLLI=0x%08x while TBF still exists. Release pending DL TBF\n",
- tlli);
- tbf_free(dl_tbf);
- dl_tbf = NULL;
- }
- LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF "
- "in packet resource request of single "
- "block, so we provide one:\n");
- sba = bts()->sba()->find(this, fn);
- if (!sba) {
- LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF "
- "in packet resource request of single "
- "block, but there is no resource request "
- "scheduled!\n");
- } else {
- ta = sba->ta;
- bts()->sba()->free_sba(sba);
- }
- if (request->Exist_MS_Radio_Access_capability) {
- ms_class = Decoding::get_ms_class_by_capability(
- &request->MS_Radio_Access_capability);
- egprs_ms_class =
- Decoding::get_egprs_ms_class_by_capability(
- &request->MS_Radio_Access_capability);
- }
- if (!ms_class)
- LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n");
- if (egprs_ms_class)
- LOGP(DRLCMAC, LOGL_NOTICE,
- "MS supports EGPRS multislot class %d.\n",
- egprs_ms_class);
- ul_tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class,
- egprs_ms_class, tlli, ta, ms);
-
- if (!ul_tbf) {
- handle_tbf_reject(bts_data(), ms, tlli,
- trx_no(), ts_no);
- return;
- }
-
- /* set control ts to current MS's TS, until assignment complete */
- LOGPTBF(ul_tbf, LOGL_DEBUG, "change control TS %d -> %d until assinment is complete.\n",
- ul_tbf->control_ts, ts_no);
-
- ul_tbf->control_ts = ts_no;
- /* schedule uplink assignment */
- TBF_SET_ASS_STATE_UL(ul_tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS);
-
- /* get capabilities */
- if (ul_tbf->ms())
- ul_tbf->ms()->set_egprs_ms_class(egprs_ms_class);
-
- /* get measurements */
- if (ul_tbf->ms()) {
- get_meas(&meas, request);
- ul_tbf->ms()->update_l1_meas(&meas);
- }
- return;
- }
-
- if (request->ID.u.Global_TFI.UnionType) {
- struct gprs_rlcmac_dl_tbf *dl_tbf;
- int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI;
- dl_tbf = bts()->dl_tbf_by_tfi(tfi, trx_no(), ts_no);
- if (!dl_tbf) {
- LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TFI=%d\n", tfi);
- return;
- }
- LOGPTBFDL(dl_tbf, LOGL_ERROR,
- "RX: [PCU <- BTS] FIXME: Packet resource request\n");
-
- /* Reset N3101 counter: */
- dl_tbf->m_n3101 = 0;
- } else {
- struct gprs_rlcmac_ul_tbf *ul_tbf;
- int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI;
- ul_tbf = bts()->ul_tbf_by_tfi(tfi, trx_no(), ts_no);
- if (!ul_tbf) {
- LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi);
- return;
- }
- LOGPTBFUL(ul_tbf, LOGL_ERROR,
- "RX: [PCU <- BTS] FIXME: Packet resource request\n");
-
- /* Reset N3101 counter: */
- ul_tbf->m_n3101 = 0;
- }
-}
-
-void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn)
-{
- struct gprs_rlcmac_sba *sba;
-
- sba = bts()->sba()->find(this, fn);
- if (!sba) {
- LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement "
- "in packet resource request of single "
- "block, but there is no resource request "
- "scheduled! TLLI=0x%08x\n", report->TLLI);
- } else {
- GprsMs *ms = bts()->ms_store().get_ms(report->TLLI);
- if (!ms)
- LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement "
- "but TLLI 0x%08x is unknown\n", report->TLLI);
- else
- ms->set_ta(sba->ta);
-
- bts()->sba()->free_sba(sba);
- }
- gprs_rlcmac_meas_rep(report);
-}
-
-/* Received Uplink RLC control block. */
-int gprs_rlcmac_pdch::rcv_control_block(
- const uint8_t *data, uint8_t data_len, bitvec *rlc_block, uint32_t fn)
-{
- 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");
-
- if (ul_control_block->u.MESSAGE_TYPE == MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK)
- bts()->send_gsmtap(PCU_GSMTAP_C_UL_DUMMY, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len);
- else
- bts()->send_gsmtap(PCU_GSMTAP_C_UL_CTRL, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len);
-
- bts()->rlc_rcvd_control();
- switch (ul_control_block->u.MESSAGE_TYPE) {
- case MT_PACKET_CONTROL_ACK:
- rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn);
- break;
- case MT_PACKET_DOWNLINK_ACK_NACK:
- rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn);
- break;
- case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK:
- rcv_control_egprs_dl_ack_nack(&ul_control_block->u.Egprs_Packet_Downlink_Ack_Nack, fn);
- break;
- case MT_PACKET_RESOURCE_REQUEST:
- rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn);
- break;
- case MT_PACKET_MEASUREMENT_REPORT:
- rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn);
- break;
- case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK:
- /* ignoring it. change the SI to not force sending these? */
- break;
- default:
- bts()->decode_error();
- LOGP(DRLCMAC, LOGL_NOTICE,
- "RX: [PCU <- BTS] unknown control block(%d) received\n",
- ul_control_block->u.MESSAGE_TYPE);
- }
- talloc_free(ul_control_block);
- return 1;
-}
-
-
-/* received RLC/MAC block from L1 */
-int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn,
- struct pcu_l1_meas *meas)
-{
- GprsCodingScheme cs = GprsCodingScheme::getBySizeUL(len);
- if (!cs) {
- bts()->decode_error();
- LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid"
- "length: %d)\n", len);
- return -EINVAL;
- }
-
- bts()->rlc_ul_bytes(len);
-
- LOGP(DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, "
- "length: %d (%d))\n", cs.name(), len, cs.usedSizeUL());
-
- if (cs.isGprs())
- return rcv_block_gprs(data, len, fn, meas, cs);
-
- if (cs.isEgprs())
- return rcv_data_block(data, len, fn, meas, cs);
-
- bts()->decode_error();
- LOGP(DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n",
- cs.name());
- return -EINVAL;
-}
-
-/*! \brief process egprs and gprs data blocks */
-int gprs_rlcmac_pdch::rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn,
- struct pcu_l1_meas *meas, GprsCodingScheme cs)
-{
- int rc;
- struct gprs_rlc_data_info rlc_dec;
- struct gprs_rlcmac_ul_tbf *tbf;
- unsigned len = cs.sizeUL();
-
- /* These are always data blocks, since EGPRS still uses CS-1 for
- * control blocks (see 44.060, section 10.3, 1st par.)
- */
- if (cs.isEgprs()) {
- if (!bts()->bts_data()->egprs_enabled) {
- LOGP(DRLCMACUL, LOGL_ERROR,
- "Got %s RLC block but EGPRS is not enabled\n",
- cs.name());
- return -EINVAL;
- }
- bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_EGPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, data, data_len);
- } else {
- bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_GPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn, data, data_len);
- }
-
- LOGP(DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len));
-
- rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs);
- if (rc < 0) {
- LOGP(DRLCMACUL, LOGL_ERROR,
- "Got %s RLC block but header parsing has failed\n",
- cs.name());
- bts()->decode_error();
- return rc;
- }
-
- LOGP(DRLCMACUL, LOGL_INFO,
- "Got %s RLC block: "
- "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, "
- "rc=%d\n",
- cs.name(),
- rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb,
- rc);
-
- /* find TBF inst from given TFI */
- tbf = ul_tbf_by_tfi(rlc_dec.tfi);
- if (!tbf) {
- LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n",
- rlc_dec.tfi);
- return 0;
- }
-
- /* Reset N3101 counter: */
- tbf->m_n3101 = 0;
-
- return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas);
-}
-
-int gprs_rlcmac_pdch::rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn,
- struct pcu_l1_meas *meas, GprsCodingScheme cs)
-{
- unsigned payload = data[0] >> 6;
- bitvec *block;
- int rc = 0;
- unsigned len = cs.maxBytesUL();
-
- switch (payload) {
- case GPRS_RLCMAC_DATA_BLOCK:
- rc = rcv_data_block(data, data_len, fn, meas, cs);
- break;
- case GPRS_RLCMAC_CONTROL_BLOCK:
- block = bitvec_alloc(len, tall_pcu_ctx);
- if (!block)
- return -ENOMEM;
- bitvec_unpack(block, data);
- rc = rcv_control_block(data, data_len, block, fn);
- bitvec_free(block);
- break;
- case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
- LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n");
- break;
- default:
- LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload);
- rc = -EINVAL;
- }
-
- return rc;
-}
-
/* update TA based on TA provided by PH-DATA-IND */
void update_tbf_ta(struct gprs_rlcmac_ul_tbf *tbf, int8_t ta_delta)
{
@@ -1679,110 +885,6 @@ void bts_update_tbf_ta(const char *p, uint32_t fn, uint8_t trx_no, uint8_t ts, i
}
}
-gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi(
- LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi,
- enum gprs_rlcmac_tbf_direction dir)
-{
- gprs_rlcmac_tbf *tbf;
- LListHead<gprs_rlcmac_tbf> *pos;
-
- llist_for_each(pos, tbf_list) {
- tbf = pos->entry();
- if (tbf->tfi() != tfi)
- continue;
- if (!tbf->pdch[ts_no])
- continue;
- return tbf;
- }
- return NULL;
-}
-
-gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi)
-{
- return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF));
-}
-
-gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi)
-{
- return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF));
-}
-
-/* lookup TBF Entity (by TFI) */
-gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi,
- enum gprs_rlcmac_tbf_direction dir)
-{
- struct gprs_rlcmac_tbf *tbf;
-
- if (tfi >= 32)
- return NULL;
-
- tbf = m_tbfs[dir][tfi];
-
- if (!tbf)
- return NULL;
-
- if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) {
- return tbf;
- }
-
- return NULL;
-}
-
-void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf)
-{
- gprs_rlcmac_ul_tbf *ul_tbf;
-
- if (m_tbfs[tbf->direction][tbf->tfi()])
- LOGP(DRLCMAC, LOGL_ERROR, "PDCH(TS %d, TRX %d): "
- "%s has not been detached, overwriting it\n",
- ts_no, trx_no(),
- m_tbfs[tbf->direction][tbf->tfi()]->name());
-
- m_num_tbfs[tbf->direction] += 1;
- if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
- ul_tbf = as_ul_tbf(tbf);
- m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no];
- }
- m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi();
- m_tbfs[tbf->direction][tbf->tfi()] = tbf;
-
- LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Attaching %s, %d TBFs, "
- "USFs = %02x, TFIs = %08x.\n",
- ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction],
- m_assigned_usf, m_assigned_tfi[tbf->direction]);
-}
-
-void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf)
-{
- gprs_rlcmac_ul_tbf *ul_tbf;
-
- OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0);
-
- m_num_tbfs[tbf->direction] -= 1;
- if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
- ul_tbf = as_ul_tbf(tbf);
- m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]);
- }
- m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi());
- m_tbfs[tbf->direction][tbf->tfi()] = NULL;
-
- LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Detaching %s, %d TBFs, "
- "USFs = %02x, TFIs = %08x.\n",
- ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction],
- m_assigned_usf, m_assigned_tfi[tbf->direction]);
-}
-
-void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir)
-{
- m_num_reserved[dir] += 1;
-}
-
-void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir)
-{
- OSMO_ASSERT(m_num_reserved[dir] > 0);
- m_num_reserved[dir] -= 1;
-}
-
void gprs_rlcmac_trx::reserve_slots(enum gprs_rlcmac_tbf_direction dir,
uint8_t slots)
{
diff --git a/src/bts.h b/src/bts.h
index 9b38ba9..9c75369 100644
--- a/src/bts.h
+++ b/src/bts.h
@@ -37,6 +37,7 @@ extern "C" {
#include "gprs_ms_storage.h"
#include "gprs_coding_scheme.h"
#include <cxx_linuxlist.h>
+#include <pdch.h>
#endif
#include <stdint.h>
@@ -65,86 +66,6 @@ enum pcu_gsmtap_category {
struct BTS;
struct GprsMs;
-/*
- * PDCH instance
- */
-struct gprs_rlcmac_pdch {
-#ifdef __cplusplus
- struct gprs_rlcmac_paging *dequeue_paging();
- struct msgb *packet_paging_request();
-
- bool add_paging(uint8_t chan_needed, uint8_t *identity_lv);
-
- void free_resources();
-
- bool is_enabled() const;
-
- void enable();
- void disable();
-
- /* dispatching of messages */
- int rcv_block(uint8_t *data, uint8_t len, uint32_t fn,
- struct pcu_l1_meas *meas);
- int rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn,
- struct pcu_l1_meas *meas, GprsCodingScheme cs);
- int rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn,
- struct pcu_l1_meas *meas, GprsCodingScheme cs);
-
- gprs_rlcmac_bts *bts_data() const;
- BTS *bts() const;
- uint8_t trx_no() const;
-
- struct gprs_rlcmac_ul_tbf *ul_tbf_by_tfi(uint8_t tfi);
- struct gprs_rlcmac_dl_tbf *dl_tbf_by_tfi(uint8_t tfi);
-
- void attach_tbf(gprs_rlcmac_tbf *tbf);
- void detach_tbf(gprs_rlcmac_tbf *tbf);
-
- unsigned num_tbfs(enum gprs_rlcmac_tbf_direction dir) const;
-
- void reserve(enum gprs_rlcmac_tbf_direction dir);
- void unreserve(enum gprs_rlcmac_tbf_direction dir);
- unsigned num_reserved(enum gprs_rlcmac_tbf_direction dir) const;
-
- uint8_t assigned_usf() const;
- uint32_t assigned_tfi(enum gprs_rlcmac_tbf_direction dir) const;
-#endif
-
- uint8_t m_is_enabled; /* TS is enabled */
- uint8_t tsc; /* TSC of this slot */
- uint8_t next_ul_tfi; /* next uplink TBF/TFI to schedule (0..31) */
- uint8_t next_dl_tfi; /* next downlink TBF/TFI to schedule (0..31) */
- uint8_t next_ctrl_prio; /* next kind of ctrl message to schedule */
- struct llist_head paging_list; /* list of paging messages */
- uint32_t last_rts_fn; /* store last frame number of RTS */
-
- /* back pointers */
- struct gprs_rlcmac_trx *trx;
- uint8_t ts_no;
-
-#ifdef __cplusplus
-private:
- int rcv_control_block(const uint8_t *data, uint8_t data_len, bitvec *rlc_block, uint32_t fn);
-
- void rcv_control_ack(Packet_Control_Acknowledgement_t *, uint32_t fn);
- void rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *, uint32_t fn);
- void rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *, uint32_t fn);
- void rcv_resource_request(Packet_Resource_Request_t *t, uint32_t fn);
- void rcv_measurement_report(Packet_Measurement_Report_t *t, uint32_t fn);
- gprs_rlcmac_tbf *tbf_from_list_by_tfi(
- LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi,
- enum gprs_rlcmac_tbf_direction dir);
- gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi,
- enum gprs_rlcmac_tbf_direction dir);
-#endif
-
- uint8_t m_num_tbfs[2];
- uint8_t m_num_reserved[2];
- uint8_t m_assigned_usf; /* bit set */
- uint32_t m_assigned_tfi[2]; /* bit set */
- struct gprs_rlcmac_tbf *m_tbfs[2][32];
-};
-
struct gprs_rlcmac_trx {
void *fl1h;
uint16_t arfcn;
@@ -540,33 +461,6 @@ inline LListHead<gprs_rlcmac_tbf>& BTS::dl_tbfs()
return m_dl_tbfs;
}
-inline BTS *gprs_rlcmac_pdch::bts() const
-{
- return trx->bts;
-}
-
-inline unsigned gprs_rlcmac_pdch::num_tbfs(enum gprs_rlcmac_tbf_direction dir) const
-{
- return m_num_tbfs[dir];
-}
-
-inline unsigned gprs_rlcmac_pdch::num_reserved(
- enum gprs_rlcmac_tbf_direction dir) const
-{
- return gprs_rlcmac_pdch::m_num_reserved[dir];
-}
-
-inline uint8_t gprs_rlcmac_pdch::assigned_usf() const
-{
- return m_assigned_usf;
-}
-
-inline uint32_t gprs_rlcmac_pdch::assigned_tfi(
- enum gprs_rlcmac_tbf_direction dir) const
-{
- return m_assigned_tfi[dir];
-}
-
inline struct rate_ctr_group *BTS::rate_counters() const
{
return m_ratectrs;
@@ -687,15 +581,6 @@ CREATE_STAT_INLINE(ms_present, ms_present_get, STAT_MS_PRESENT);
#undef CREATE_STAT_INLINE
-inline gprs_rlcmac_bts *gprs_rlcmac_pdch::bts_data() const
-{
- return trx->bts->bts_data();
-}
-
-inline uint8_t gprs_rlcmac_pdch::trx_no() const
-{
- return trx->trx_no;
-}
#endif
#ifdef __cplusplus
@@ -707,8 +592,4 @@ extern "C" {
#ifdef __cplusplus
}
-inline bool gprs_rlcmac_pdch::is_enabled() const
-{
- return m_is_enabled;
-}
#endif
diff --git a/src/gprs_bssgp_pcu.cpp b/src/gprs_bssgp_pcu.cpp
index e0d756a..3cc86e2 100644
--- a/src/gprs_bssgp_pcu.cpp
+++ b/src/gprs_bssgp_pcu.cpp
@@ -25,6 +25,7 @@
#include <bts.h>
#include <tbf.h>
#include <gprs_coding_scheme.h>
+#include <pdch.h>
#define BSSGP_TIMER_T1 30 /* Guards the (un)blocking procedures */
#define BSSGP_TIMER_T2 30 /* Guards the reset procedure */
diff --git a/src/gprs_rlcmac_sched.cpp b/src/gprs_rlcmac_sched.cpp
index e4e40b1..57756e3 100644
--- a/src/gprs_rlcmac_sched.cpp
+++ b/src/gprs_rlcmac_sched.cpp
@@ -26,6 +26,7 @@
#include <gprs_ms.h>
#include <rlc.h>
#include <sba.h>
+#include <pdch.h>
#include "pcu_utils.h"
extern "C" {
diff --git a/src/gprs_rlcmac_ts_alloc.cpp b/src/gprs_rlcmac_ts_alloc.cpp
index 0955411..29e41f5 100644
--- a/src/gprs_rlcmac_ts_alloc.cpp
+++ b/src/gprs_rlcmac_ts_alloc.cpp
@@ -23,6 +23,7 @@
#include <gprs_debug.h>
#include <bts.h>
#include <tbf.h>
+#include <pdch.h>
#include <gprs_ms.h>
#include <pcu_utils.h>
diff --git a/src/osmo-bts-litecell15/lc15_l1_if.c b/src/osmo-bts-litecell15/lc15_l1_if.c
index 8290a93..1df7941 100644
--- a/src/osmo-bts-litecell15/lc15_l1_if.c
+++ b/src/osmo-bts-litecell15/lc15_l1_if.c
@@ -34,6 +34,7 @@
#include <lc15_l1_if.h>
#include <gprs_debug.h>
#include <pcu_l1_if.h>
+#include <pdch.h>
#include <bts.h>
extern void *tall_pcu_ctx;
diff --git a/src/osmo-bts-sysmo/sysmo_l1_if.c b/src/osmo-bts-sysmo/sysmo_l1_if.c
index dfef239..5d127dd 100644
--- a/src/osmo-bts-sysmo/sysmo_l1_if.c
+++ b/src/osmo-bts-sysmo/sysmo_l1_if.c
@@ -15,6 +15,7 @@
#include <sysmo_l1_if.h>
#include <gprs_debug.h>
#include <pcu_l1_if.h>
+#include <pdch.h>
#include <bts.h>
extern void *tall_pcu_ctx;
diff --git a/src/osmobts_sock.cpp b/src/osmobts_sock.cpp
index b9664b0..477521d 100644
--- a/src/osmobts_sock.cpp
+++ b/src/osmobts_sock.cpp
@@ -40,6 +40,7 @@ extern "C" {
#include <osmocom/pcu/pcuif_proto.h>
#include <bts.h>
#include <tbf.h>
+#include <pdch.h>
extern void *tall_pcu_ctx;
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 805336a..664a7b7 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -46,6 +46,7 @@ extern "C" {
#include <gprs_bssgp_pcu.h>
#include <osmocom/pcu/pcuif_proto.h>
#include <bts.h>
+#include <pdch.h>
// FIXME: move this, when changed from c++ to c.
extern "C" {
diff --git a/src/pcu_vty.c b/src/pcu_vty.c
index 5c3f625..6f50bf1 100644
--- a/src/pcu_vty.c
+++ b/src/pcu_vty.c
@@ -12,9 +12,9 @@
#include <osmocom/pcu/pcuif_proto.h>
#include "pcu_vty.h"
#include "gprs_rlcmac.h"
+#include <pdch.h>
#include "bts.h"
#include "tbf.h"
-
#include "pcu_vty_functions.h"
extern void *tall_pcu_ctx;
diff --git a/src/pcu_vty_functions.cpp b/src/pcu_vty_functions.cpp
index e80b0f5..c71959d 100644
--- a/src/pcu_vty_functions.cpp
+++ b/src/pcu_vty_functions.cpp
@@ -32,6 +32,7 @@
#include <pcu_l1_if.h>
#include <rlc.h>
#include <tbf.h>
+#include <pdch.h>
extern "C" {
#include <osmocom/vty/command.h>
diff --git a/src/pdch.cpp b/src/pdch.cpp
new file mode 100644
index 0000000..ee9df31
--- /dev/null
+++ b/src/pdch.cpp
@@ -0,0 +1,963 @@
+/*
+ * Copyright (C) 2013 by Holger Hans Peter Freyther
+ * Copyright (C) 2018 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 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 Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <bts.h>
+#include <pdch.h>
+#include <decoding.h>
+#include <encoding.h>
+#include <gprs_rlcmac.h>
+#include <gprs_debug.h>
+#include <gprs_coding_scheme.h>
+#include <gprs_ms.h>
+#include <gprs_ms_storage.h>
+#include <pcu_l1_if.h>
+#include <rlc.h>
+#include <sba.h>
+#include <tbf.h>
+#include <cxx_linuxlist.h>
+#include <gsm_rlcmac.h>
+
+extern "C" {
+ #include <osmocom/core/talloc.h>
+ #include <osmocom/core/msgb.h>
+ #include <osmocom/gsm/protocol/gsm_04_08.h>
+ #include <osmocom/core/bitvec.h>
+ #include <osmocom/core/gsmtap.h>
+ #include <osmocom/core/logging.h>
+ #include <osmocom/core/utils.h>
+}
+
+#include <errno.h>
+#include <arpa/inet.h>
+
+extern void *tall_pcu_ctx;
+
+static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc)
+{
+ static const int16_t rx_qual_map[] = {
+ 0, /* 0,14 % */
+ 0, /* 0,28 % */
+ 1, /* 0,57 % */
+ 1, /* 1,13 % */
+ 2, /* 2,26 % */
+ 5, /* 4,53 % */
+ 9, /* 9,05 % */
+ 18, /* 18,10 % */
+ };
+
+ meas->set_ms_rx_qual(rx_qual_map[
+ OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1)
+ ]);
+}
+
+static void get_meas(struct pcu_l1_meas *meas,
+ const Packet_Resource_Request_t *qr)
+{
+ unsigned i;
+
+ meas->set_ms_c_value(qr->C_VALUE);
+ if (qr->Exist_SIGN_VAR)
+ meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */
+
+ for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++)
+ {
+ if (qr->Slot[i].Exist) {
+ LOGP(DRLCMAC, LOGL_INFO,
+ "Packet resource request: i_level[%d] = %d\n",
+ i, qr->Slot[i].I_LEVEL);
+ meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL);
+ }
+ }
+}
+
+static void get_meas(struct pcu_l1_meas *meas,
+ const Channel_Quality_Report_t *qr)
+{
+ unsigned i;
+
+ get_rx_qual_meas(meas, qr->RXQUAL);
+ meas->set_ms_c_value(qr->C_VALUE);
+ meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */
+
+ for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++)
+ {
+ if (qr->Slot[i].Exist) {
+ LOGP(DRLCMAC, LOGL_DEBUG,
+ "Channel quality report: i_level[%d] = %d\n",
+ i, qr->Slot[i].I_LEVEL_TN);
+ meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL_TN);
+ }
+ }
+}
+
+static inline void sched_ul_ass_or_rej(BTS *bts, gprs_rlcmac_bts *bts_data, struct gprs_rlcmac_dl_tbf *tbf)
+{
+ bts->channel_request_description();
+
+ /* This call will register the new TBF with the MS on success */
+ gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul(bts_data, tbf->trx->trx_no, tbf->ms_class(),
+ tbf->ms()->egprs_ms_class(), tbf->tlli(), tbf->ta(), tbf->ms());
+
+ /* schedule uplink assignment or reject */
+ if (ul_tbf) {
+ LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we provide one:\n");
+ TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS);
+ } else {
+ LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n");
+ TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS_REJ);
+ }
+}
+
+void gprs_rlcmac_pdch::enable()
+{
+ /* TODO: Check if there are still allocated resources.. */
+ INIT_LLIST_HEAD(&paging_list);
+ m_is_enabled = 1;
+}
+
+void gprs_rlcmac_pdch::disable()
+{
+ /* TODO.. kick free_resources once we know the TRX/TS we are on */
+ m_is_enabled = 0;
+}
+
+void gprs_rlcmac_pdch::free_resources()
+{
+ struct gprs_rlcmac_paging *pag;
+
+ /* we are not enabled. there should be no resources */
+ if (!is_enabled())
+ return;
+
+ /* kick all TBF on slot */
+ gprs_rlcmac_tbf::free_all(this);
+
+ /* flush all pending paging messages */
+ while ((pag = dequeue_paging()))
+ talloc_free(pag);
+
+ trx->bts->sba()->free_resources(this);
+}
+
+struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging()
+{
+ struct gprs_rlcmac_paging *pag;
+
+ if (llist_empty(&paging_list))
+ return NULL;
+ pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list);
+ llist_del(&pag->list);
+
+ return pag;
+}
+
+struct msgb *gprs_rlcmac_pdch::packet_paging_request()
+{
+ struct gprs_rlcmac_paging *pag;
+ struct msgb *msg;
+ unsigned wp = 0, len;
+
+ /* no paging, no message */
+ pag = dequeue_paging();
+ if (!pag)
+ return NULL;
+
+ LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n");
+
+ /* alloc message */
+ msg = msgb_alloc(23, "pag ctrl block");
+ if (!msg) {
+ talloc_free(pag);
+ return NULL;
+ }
+ bitvec *pag_vec = bitvec_alloc(23, tall_pcu_ctx);
+ if (!pag_vec) {
+ msgb_free(msg);
+ talloc_free(pag);
+ return NULL;
+ }
+ wp = Encoding::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");
+ goto continue_next;
+ }
+ } 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");
+ goto continue_next;
+ }
+ }
+ 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, &paging_list);
+ break;
+ }
+ Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0],
+ pag->identity_lv + 1, pag->chan_needed);
+
+continue_next:
+ talloc_free(pag);
+ pag = dequeue_paging();
+ }
+
+ 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;
+}
+
+bool gprs_rlcmac_pdch::add_paging(uint8_t chan_needed, uint8_t *identity_lv)
+{
+ struct gprs_rlcmac_paging *pag = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_paging);
+ if (!pag)
+ return false;
+
+ pag->chan_needed = chan_needed;
+ memcpy(pag->identity_lv, identity_lv, identity_lv[0] + 1);
+
+ llist_add(&pag->list, &paging_list);
+
+ return true;
+}
+
+void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn)
+{
+ struct gprs_rlcmac_tbf *tbf, *new_tbf;
+ uint32_t tlli = packet->TLLI;
+ GprsMs *ms = bts()->ms_by_tlli(tlli);
+ gprs_rlcmac_ul_tbf *ul_tbf;
+
+ tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no);
+ if (!tbf)
+ tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
+
+ if (!tbf) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
+ "unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n",
+ fn, tlli, trx_no(), ts_no);
+ if (ms)
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
+ "unknown TBF corresponds to MS with IMSI %s, TA %d, "
+ "uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n",
+ ms->imsi(), ms->ta(),
+ ms->ul_tbf() ? ms->ul_tbf()->tfi() : 0,
+ ms->ul_tbf() ? ms->ul_tbf()->state_name() : "None",
+ ms->dl_tbf() ? ms->dl_tbf()->tfi() : 0,
+ ms->dl_tbf() ? ms->dl_tbf()->state_name() : "None");
+ return;
+ }
+
+ /* Reset N3101 counter: */
+ tbf->m_n3101 = 0;
+
+ tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF);
+
+ LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Control Ack\n");
+ TBF_POLL_SCHED_UNSET(tbf);
+
+ /* check if this control ack belongs to packet uplink ack */
+ ul_tbf = as_ul_tbf(tbf);
+ if (ul_tbf && ul_tbf->handle_ctrl_ack()) {
+ LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n");
+ if (ul_tbf->ctrl_ack_to_toggle())
+ LOGPTBF(tbf, LOGL_NOTICE, "Recovered uplink ack for UL\n");
+
+ tbf_free(tbf);
+ return;
+ }
+ if (tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_WAIT_ACK)) {
+ LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n");
+ /* reset N3105 */
+ tbf->n3105 = 0;
+ TBF_SET_ASS_STATE_DL(tbf, GPRS_RLCMAC_DL_ASS_NONE);
+
+ new_tbf = tbf->ms() ? tbf->ms()->dl_tbf() : NULL;
+ if (!new_tbf) {
+ LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL "
+ "TBF is gone TLLI=0x%08x\n", tlli);
+ return;
+ }
+ if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) &&
+ tbf->direction == new_tbf->direction)
+ tbf_free(tbf);
+
+ if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_CCCH)) {
+ /* We now know that the PACCH really existed */
+ LOGPTBF(new_tbf, LOGL_INFO,
+ "The TBF has been confirmed on the PACCH, "
+ "changed type from CCCH to PACCH\n");
+ TBF_ASS_TYPE_SET(new_tbf, GPRS_RLCMAC_FLAG_PACCH);
+ }
+ TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW);
+ /* stop pending assignment timer */
+ new_tbf->t_stop(T0, "control acked (DL-TBF)");
+ if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ASS))
+ LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered downlink assignment\n");
+
+ tbf_assign_control_ts(new_tbf);
+ return;
+ }
+ if (tbf->ul_ass_state_is(GPRS_RLCMAC_UL_ASS_WAIT_ACK)) {
+ LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n");
+ /* reset N3105 */
+ tbf->n3105 = 0;
+ TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_NONE);
+
+ new_tbf = tbf->ms() ? tbf->ms()->ul_tbf() : NULL;
+ if (!new_tbf) {
+ LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL "
+ "TBF is gone TLLI=0x%08x\n", tlli);
+ return;
+ }
+ if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) &&
+ tbf->direction == new_tbf->direction)
+ tbf_free(tbf);
+
+ TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW);
+ if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_UL_ASS))
+ LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered uplink assignment for UL\n");
+
+ tbf_assign_control_ts(new_tbf);
+ /* there might be LLC packets waiting in the queue, but the DL
+ * TBF might have been released while the UL TBF has been
+ * established */
+ if (new_tbf->ms()->need_dl_tbf())
+ new_tbf->establish_dl_tbf_on_pacch();
+
+ return;
+ }
+ LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK "
+ "at no request\n");
+}
+
+void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn)
+{
+ int8_t tfi = 0; /* must be signed */
+ struct gprs_rlcmac_dl_tbf *tbf;
+ int rc;
+ struct pcu_l1_meas meas;
+ int num_blocks;
+ uint8_t bits_data[RLC_GPRS_WS/8];
+ bitvec bits;
+ int bsn_begin, bsn_end;
+ char show_bits[RLC_GPRS_WS + 1];
+
+ tfi = ack_nack->DOWNLINK_TFI;
+ tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
+ if (!tbf) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
+ "unknown FN=%u TFI=%d (TRX %d TS %d)\n",
+ fn, tfi, trx_no(), ts_no);
+ return;
+ }
+ if (tbf->tfi() != tfi) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
+ "wrong TFI=%d, ignoring!\n", tfi);
+ return;
+ }
+
+ /* Reset N3101 counter: */
+ tbf->m_n3101 = 0;
+
+ if (tbf->handle_ack_nack())
+ LOGPTBF(tbf, LOGL_NOTICE, "Recovered downlink ack\n");
+
+ LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n");
+
+ bits.data = bits_data;
+ bits.data_len = sizeof(bits_data);
+ bits.cur_bit = 0;
+
+ num_blocks = Decoding::decode_gprs_acknack_bits(
+ &ack_nack->Ack_Nack_Description, &bits,
+ &bsn_begin, &bsn_end, tbf->window());
+
+ LOGP(DRLCMAC, LOGL_DEBUG,
+ "Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), "
+ "\"%s\"\n",
+ ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER,
+ bsn_begin, bsn_end, num_blocks,
+ (Decoding::extract_rbb(&bits, show_bits), show_bits));
+
+ rc = tbf->rcvd_dl_ack(
+ ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION,
+ bsn_begin, &bits);
+ if (rc == 1) {
+ tbf_free(tbf);
+ return;
+ }
+ /* check for channel request */
+ if (ack_nack->Exist_Channel_Request_Description)
+ sched_ul_ass_or_rej(bts(), bts_data(), tbf);
+
+ /* get measurements */
+ if (tbf->ms()) {
+ get_meas(&meas, &ack_nack->Channel_Quality_Report);
+ tbf->ms()->update_l1_meas(&meas);
+ }
+}
+
+void gprs_rlcmac_pdch::rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *ack_nack, uint32_t fn)
+{
+ int8_t tfi = 0; /* must be signed */
+ struct gprs_rlcmac_dl_tbf *tbf;
+ struct pcu_l1_meas meas;
+ int rc;
+ int num_blocks;
+ uint8_t bits_data[RLC_EGPRS_MAX_WS/8];
+ char show_bits[RLC_EGPRS_MAX_WS + 1];
+ bitvec bits;
+ int bsn_begin, bsn_end;
+
+ tfi = ack_nack->DOWNLINK_TFI;
+ tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
+ if (!tbf) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with "
+ "unknown FN=%u TFI=%d (TRX %d TS %d)\n",
+ fn, tfi, trx_no(), ts_no);
+ return;
+ }
+ if (tbf->tfi() != tfi) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with "
+ "wrong TFI=%d, ignoring!\n", tfi);
+ return;
+ }
+
+ /* Reset N3101 counter: */
+ tbf->m_n3101 = 0;
+
+ if (tbf->handle_ack_nack())
+ LOGPTBF(tbf, LOGL_NOTICE, "Recovered EGPRS downlink ack\n");
+
+ LOGPTBF(tbf, LOGL_DEBUG,
+ "RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n");
+
+ LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: "
+ "ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, "
+ "urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n",
+ (int)ack_nack->EGPRS_AckNack.UnionType,
+ (int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION,
+ (int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW,
+ (int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW,
+ (int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER,
+ (int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB,
+ (int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH,
+ (void *)&ack_nack->EGPRS_AckNack.UnionType,
+ (void *)&ack_nack->EGPRS_AckNack.Desc,
+ (int)offsetof(EGPRS_AckNack_t, Desc),
+ (int)offsetof(EGPRS_AckNack_w_len_t, Desc),
+ tbf->window()->v_a(),
+ tbf->window()->v_s(),
+ osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB,
+ sizeof(ack_nack->EGPRS_AckNack.Desc.URBB)));
+
+ bits.data = bits_data;
+ bits.data_len = sizeof(bits_data);
+ bits.cur_bit = 0;
+
+ num_blocks = Decoding::decode_egprs_acknack_bits(
+ &ack_nack->EGPRS_AckNack.Desc, &bits,
+ &bsn_begin, &bsn_end, tbf->window());
+
+ LOGP(DRLCMAC, LOGL_DEBUG,
+ "Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), "
+ "\"%s\"\n",
+ ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER,
+ bsn_begin, bsn_end, num_blocks,
+ (Decoding::extract_rbb(&bits, show_bits), show_bits)
+ );
+
+ rc = tbf->rcvd_dl_ack(
+ ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION,
+ bsn_begin, &bits);
+ if (rc == 1) {
+ tbf_free(tbf);
+ return;
+ }
+
+ /* check for channel request */
+ if (ack_nack->Exist_ChannelRequestDescription)
+ sched_ul_ass_or_rej(bts(), bts_data(), tbf);
+
+ /* get measurements */
+ if (tbf->ms()) {
+ /* TODO: Implement Measurements parsing for EGPRS */
+ /*
+ get_meas(&meas, &ack_nack->Channel_Quality_Report);
+ tbf->ms()->update_l1_meas(&meas);
+ */
+ }
+}
+
+void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn)
+{
+ struct gprs_rlcmac_sba *sba;
+
+ if (request->ID.UnionType) {
+ struct gprs_rlcmac_ul_tbf *ul_tbf = NULL;
+ struct gprs_rlcmac_dl_tbf *dl_tbf = NULL;
+ uint32_t tlli = request->ID.u.TLLI;
+ uint8_t ms_class = 0;
+ uint8_t egprs_ms_class = 0;
+ uint8_t ta = GSM48_TA_INVALID;
+ struct pcu_l1_meas meas;
+
+ GprsMs *ms = bts()->ms_by_tlli(tlli);
+ /* Keep the ms, even if it gets idle temporarily */
+ GprsMs::Guard guard(ms);
+
+ if (ms) {
+ ul_tbf = ms->ul_tbf();
+ dl_tbf = ms->dl_tbf();
+ ta = ms->ta();
+ }
+
+ /* We got a RACH so the MS was in packet idle mode and thus
+ * didn't have any active TBFs */
+ if (ul_tbf) {
+ LOGPTBFUL(ul_tbf, LOGL_NOTICE,
+ "Got RACH from TLLI=0x%08x while TBF still exists. Killing pending UL TBF\n",
+ tlli);
+ tbf_free(ul_tbf);
+ ul_tbf = NULL;
+ }
+
+ if (dl_tbf) {
+ LOGPTBFUL(dl_tbf, LOGL_NOTICE,
+ "Got RACH from TLLI=0x%08x while TBF still exists. Release pending DL TBF\n",
+ tlli);
+ tbf_free(dl_tbf);
+ dl_tbf = NULL;
+ }
+ LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF "
+ "in packet resource request of single "
+ "block, so we provide one:\n");
+ sba = bts()->sba()->find(this, fn);
+ if (!sba) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF "
+ "in packet resource request of single "
+ "block, but there is no resource request "
+ "scheduled!\n");
+ } else {
+ ta = sba->ta;
+ bts()->sba()->free_sba(sba);
+ }
+ if (request->Exist_MS_Radio_Access_capability) {
+ ms_class = Decoding::get_ms_class_by_capability(
+ &request->MS_Radio_Access_capability);
+ egprs_ms_class =
+ Decoding::get_egprs_ms_class_by_capability(
+ &request->MS_Radio_Access_capability);
+ }
+ if (!ms_class)
+ LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n");
+ if (egprs_ms_class)
+ LOGP(DRLCMAC, LOGL_NOTICE,
+ "MS supports EGPRS multislot class %d.\n",
+ egprs_ms_class);
+ ul_tbf = tbf_alloc_ul(bts_data(), trx_no(), ms_class,
+ egprs_ms_class, tlli, ta, ms);
+
+ if (!ul_tbf) {
+ handle_tbf_reject(bts_data(), ms, tlli,
+ trx_no(), ts_no);
+ return;
+ }
+
+ /* set control ts to current MS's TS, until assignment complete */
+ LOGPTBF(ul_tbf, LOGL_DEBUG, "change control TS %d -> %d until assinment is complete.\n",
+ ul_tbf->control_ts, ts_no);
+
+ ul_tbf->control_ts = ts_no;
+ /* schedule uplink assignment */
+ TBF_SET_ASS_STATE_UL(ul_tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS);
+
+ /* get capabilities */
+ if (ul_tbf->ms())
+ ul_tbf->ms()->set_egprs_ms_class(egprs_ms_class);
+
+ /* get measurements */
+ if (ul_tbf->ms()) {
+ get_meas(&meas, request);
+ ul_tbf->ms()->update_l1_meas(&meas);
+ }
+ return;
+ }
+
+ if (request->ID.u.Global_TFI.UnionType) {
+ struct gprs_rlcmac_dl_tbf *dl_tbf;
+ int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI;
+ dl_tbf = bts()->dl_tbf_by_tfi(tfi, trx_no(), ts_no);
+ if (!dl_tbf) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown downlink TFI=%d\n", tfi);
+ return;
+ }
+ LOGPTBFDL(dl_tbf, LOGL_ERROR,
+ "RX: [PCU <- BTS] FIXME: Packet resource request\n");
+
+ /* Reset N3101 counter: */
+ dl_tbf->m_n3101 = 0;
+ } else {
+ struct gprs_rlcmac_ul_tbf *ul_tbf;
+ int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI;
+ ul_tbf = bts()->ul_tbf_by_tfi(tfi, trx_no(), ts_no);
+ if (!ul_tbf) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESSOURCE REQ unknown uplink TFI=%d\n", tfi);
+ return;
+ }
+ LOGPTBFUL(ul_tbf, LOGL_ERROR,
+ "RX: [PCU <- BTS] FIXME: Packet resource request\n");
+
+ /* Reset N3101 counter: */
+ ul_tbf->m_n3101 = 0;
+ }
+}
+
+void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn)
+{
+ struct gprs_rlcmac_sba *sba;
+
+ sba = bts()->sba()->find(this, fn);
+ if (!sba) {
+ LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement "
+ "in packet resource request of single "
+ "block, but there is no resource request "
+ "scheduled! TLLI=0x%08x\n", report->TLLI);
+ } else {
+ GprsMs *ms = bts()->ms_store().get_ms(report->TLLI);
+ if (!ms)
+ LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement "
+ "but TLLI 0x%08x is unknown\n", report->TLLI);
+ else
+ ms->set_ta(sba->ta);
+
+ bts()->sba()->free_sba(sba);
+ }
+ gprs_rlcmac_meas_rep(report);
+}
+
+/* Received Uplink RLC control block. */
+int gprs_rlcmac_pdch::rcv_control_block(
+ const uint8_t *data, uint8_t data_len, bitvec *rlc_block, uint32_t fn)
+{
+ 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");
+
+ if (ul_control_block->u.MESSAGE_TYPE == MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK)
+ bts()->send_gsmtap(PCU_GSMTAP_C_UL_DUMMY, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len);
+ else
+ bts()->send_gsmtap(PCU_GSMTAP_C_UL_CTRL, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len);
+
+ bts()->rlc_rcvd_control();
+ switch (ul_control_block->u.MESSAGE_TYPE) {
+ case MT_PACKET_CONTROL_ACK:
+ rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn);
+ break;
+ case MT_PACKET_DOWNLINK_ACK_NACK:
+ rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn);
+ break;
+ case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK:
+ rcv_control_egprs_dl_ack_nack(&ul_control_block->u.Egprs_Packet_Downlink_Ack_Nack, fn);
+ break;
+ case MT_PACKET_RESOURCE_REQUEST:
+ rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn);
+ break;
+ case MT_PACKET_MEASUREMENT_REPORT:
+ rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn);
+ break;
+ case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK:
+ /* ignoring it. change the SI to not force sending these? */
+ break;
+ default:
+ bts()->decode_error();
+ LOGP(DRLCMAC, LOGL_NOTICE,
+ "RX: [PCU <- BTS] unknown control block(%d) received\n",
+ ul_control_block->u.MESSAGE_TYPE);
+ }
+ talloc_free(ul_control_block);
+ return 1;
+}
+
+/* received RLC/MAC block from L1 */
+int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn,
+ struct pcu_l1_meas *meas)
+{
+ GprsCodingScheme cs = GprsCodingScheme::getBySizeUL(len);
+ if (!cs) {
+ bts()->decode_error();
+ LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid"
+ "length: %d)\n", len);
+ return -EINVAL;
+ }
+
+ bts()->rlc_ul_bytes(len);
+
+ LOGP(DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, "
+ "length: %d (%d))\n", cs.name(), len, cs.usedSizeUL());
+
+ if (cs.isGprs())
+ return rcv_block_gprs(data, len, fn, meas, cs);
+
+ if (cs.isEgprs())
+ return rcv_data_block(data, len, fn, meas, cs);
+
+ bts()->decode_error();
+ LOGP(DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n",
+ cs.name());
+ return -EINVAL;
+}
+
+/*! \brief process egprs and gprs data blocks */
+int gprs_rlcmac_pdch::rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn,
+ struct pcu_l1_meas *meas, GprsCodingScheme cs)
+{
+ int rc;
+ struct gprs_rlc_data_info rlc_dec;
+ struct gprs_rlcmac_ul_tbf *tbf;
+ unsigned len = cs.sizeUL();
+
+ /* These are always data blocks, since EGPRS still uses CS-1 for
+ * control blocks (see 44.060, section 10.3, 1st par.)
+ */
+ if (cs.isEgprs()) {
+ if (!bts()->bts_data()->egprs_enabled) {
+ LOGP(DRLCMACUL, LOGL_ERROR,
+ "Got %s RLC block but EGPRS is not enabled\n",
+ cs.name());
+ return -EINVAL;
+ }
+ bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_EGPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn,
+ data, data_len);
+ } else {
+ bts()->send_gsmtap(PCU_GSMTAP_C_UL_DATA_GPRS, true, trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn,
+ data, data_len);
+ }
+
+ LOGP(DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len));
+
+ rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs);
+ if (rc < 0) {
+ LOGP(DRLCMACUL, LOGL_ERROR,
+ "Got %s RLC block but header parsing has failed\n",
+ cs.name());
+ bts()->decode_error();
+ return rc;
+ }
+
+ LOGP(DRLCMACUL, LOGL_INFO,
+ "Got %s RLC block: "
+ "R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, "
+ "rc=%d\n",
+ cs.name(),
+ rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb,
+ rc);
+
+ /* find TBF inst from given TFI */
+ tbf = ul_tbf_by_tfi(rlc_dec.tfi);
+ if (!tbf) {
+ LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n",
+ rlc_dec.tfi);
+ return 0;
+ }
+
+ /* Reset N3101 counter: */
+ tbf->m_n3101 = 0;
+
+ return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas);
+}
+
+int gprs_rlcmac_pdch::rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn,
+ struct pcu_l1_meas *meas, GprsCodingScheme cs)
+{
+ unsigned payload = data[0] >> 6;
+ bitvec *block;
+ int rc = 0;
+ unsigned len = cs.maxBytesUL();
+
+ switch (payload) {
+ case GPRS_RLCMAC_DATA_BLOCK:
+ rc = rcv_data_block(data, data_len, fn, meas, cs);
+ break;
+ case GPRS_RLCMAC_CONTROL_BLOCK:
+ block = bitvec_alloc(len, tall_pcu_ctx);
+ if (!block)
+ return -ENOMEM;
+ bitvec_unpack(block, data);
+ rc = rcv_control_block(data, data_len, block, fn);
+ bitvec_free(block);
+ break;
+ case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
+ LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n");
+ break;
+ default:
+ LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi(
+ LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi,
+ enum gprs_rlcmac_tbf_direction dir)
+{
+ gprs_rlcmac_tbf *tbf;
+ LListHead<gprs_rlcmac_tbf> *pos;
+
+ llist_for_each(pos, tbf_list) {
+ tbf = pos->entry();
+ if (tbf->tfi() != tfi)
+ continue;
+ if (!tbf->pdch[ts_no])
+ continue;
+ return tbf;
+ }
+ return NULL;
+}
+
+gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi)
+{
+ return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF));
+}
+
+gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi)
+{
+ return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF));
+}
+
+/* lookup TBF Entity (by TFI) */
+gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi,
+ enum gprs_rlcmac_tbf_direction dir)
+{
+ struct gprs_rlcmac_tbf *tbf;
+
+ if (tfi >= 32)
+ return NULL;
+
+ tbf = m_tbfs[dir][tfi];
+
+ if (!tbf)
+ return NULL;
+
+ if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) {
+ return tbf;
+ }
+
+ return NULL;
+}
+
+void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf)
+{
+ gprs_rlcmac_ul_tbf *ul_tbf;
+
+ if (m_tbfs[tbf->direction][tbf->tfi()])
+ LOGP(DRLCMAC, LOGL_ERROR, "PDCH(TS %d, TRX %d): "
+ "%s has not been detached, overwriting it\n",
+ ts_no, trx_no(),
+ m_tbfs[tbf->direction][tbf->tfi()]->name());
+
+ m_num_tbfs[tbf->direction] += 1;
+ if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
+ ul_tbf = as_ul_tbf(tbf);
+ m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no];
+ }
+ m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi();
+ m_tbfs[tbf->direction][tbf->tfi()] = tbf;
+
+ LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Attaching %s, %d TBFs, "
+ "USFs = %02x, TFIs = %08x.\n",
+ ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction],
+ m_assigned_usf, m_assigned_tfi[tbf->direction]);
+}
+
+void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf)
+{
+ gprs_rlcmac_ul_tbf *ul_tbf;
+
+ OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0);
+
+ m_num_tbfs[tbf->direction] -= 1;
+ if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
+ ul_tbf = as_ul_tbf(tbf);
+ m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]);
+ }
+ m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi());
+ m_tbfs[tbf->direction][tbf->tfi()] = NULL;
+
+ LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Detaching %s, %d TBFs, "
+ "USFs = %02x, TFIs = %08x.\n",
+ ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction],
+ m_assigned_usf, m_assigned_tfi[tbf->direction]);
+}
+
+void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir)
+{
+ m_num_reserved[dir] += 1;
+}
+
+void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir)
+{
+ OSMO_ASSERT(m_num_reserved[dir] > 0);
+ m_num_reserved[dir] -= 1;
+}
+
+inline BTS *gprs_rlcmac_pdch::bts() const
+{
+ return trx->bts;
+}
+
+uint8_t gprs_rlcmac_pdch::trx_no() const
+{
+ return trx->trx_no;
+}
+
+inline gprs_rlcmac_bts *gprs_rlcmac_pdch::bts_data() const
+{
+ return trx->bts->bts_data();
+}
+
diff --git a/src/pdch.h b/src/pdch.h
new file mode 100644
index 0000000..cf9804d
--- /dev/null
+++ b/src/pdch.h
@@ -0,0 +1,147 @@
+/* pdch.h
+ *
+ * Copyright (C) 2012 Ivan Klyuchnikov
+ * Copyright (C) 2013 by Holger Hans Peter Freyther
+ * Copyright (C) 2018 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ *
+ * 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.
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#include <osmocom/core/linuxlist.h>
+}
+
+#include <gsm_rlcmac.h>
+#include <gprs_coding_scheme.h>
+#include <bts.h>
+#endif
+
+#include <tbf.h>
+
+#include <stdint.h>
+
+/*
+ * PDCH instance
+ */
+struct gprs_rlcmac_pdch {
+#ifdef __cplusplus
+ struct gprs_rlcmac_paging *dequeue_paging();
+ struct msgb *packet_paging_request();
+
+ bool add_paging(uint8_t chan_needed, uint8_t *identity_lv);
+
+ void free_resources();
+
+ bool is_enabled() const;
+
+ void enable();
+ void disable();
+
+ /* dispatching of messages */
+ int rcv_block(uint8_t *data, uint8_t len, uint32_t fn,
+ struct pcu_l1_meas *meas);
+ int rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn,
+ struct pcu_l1_meas *meas, GprsCodingScheme cs);
+ int rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn,
+ struct pcu_l1_meas *meas, GprsCodingScheme cs);
+
+ gprs_rlcmac_bts *bts_data() const;
+ BTS *bts() const;
+ uint8_t trx_no() const;
+
+ struct gprs_rlcmac_ul_tbf *ul_tbf_by_tfi(uint8_t tfi);
+ struct gprs_rlcmac_dl_tbf *dl_tbf_by_tfi(uint8_t tfi);
+
+ void attach_tbf(gprs_rlcmac_tbf *tbf);
+ void detach_tbf(gprs_rlcmac_tbf *tbf);
+
+ unsigned num_tbfs(enum gprs_rlcmac_tbf_direction dir) const;
+
+ void reserve(enum gprs_rlcmac_tbf_direction dir);
+ void unreserve(enum gprs_rlcmac_tbf_direction dir);
+ unsigned num_reserved(enum gprs_rlcmac_tbf_direction dir) const;
+
+ uint8_t assigned_usf() const;
+ uint32_t assigned_tfi(enum gprs_rlcmac_tbf_direction dir) const;
+#endif
+
+ uint8_t m_is_enabled; /* TS is enabled */
+ uint8_t tsc; /* TSC of this slot */
+ uint8_t next_ul_tfi; /* next uplink TBF/TFI to schedule (0..31) */
+ uint8_t next_dl_tfi; /* next downlink TBF/TFI to schedule (0..31) */
+ uint8_t next_ctrl_prio; /* next kind of ctrl message to schedule */
+ struct llist_head paging_list; /* list of paging messages */
+ uint32_t last_rts_fn; /* store last frame number of RTS */
+
+ /* back pointers */
+ struct gprs_rlcmac_trx *trx;
+ uint8_t ts_no;
+
+#ifdef __cplusplus
+private:
+ int rcv_control_block(const uint8_t *data, uint8_t data_len, bitvec *rlc_block, uint32_t fn);
+
+ void rcv_control_ack(Packet_Control_Acknowledgement_t *, uint32_t fn);
+ void rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *, uint32_t fn);
+ void rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *, uint32_t fn);
+ void rcv_resource_request(Packet_Resource_Request_t *t, uint32_t fn);
+ void rcv_measurement_report(Packet_Measurement_Report_t *t, uint32_t fn);
+ gprs_rlcmac_tbf *tbf_from_list_by_tfi(
+ LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi,
+ enum gprs_rlcmac_tbf_direction dir);
+ gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi,
+ enum gprs_rlcmac_tbf_direction dir);
+#endif
+
+ uint8_t m_num_tbfs[2];
+ uint8_t m_num_reserved[2];
+ uint8_t m_assigned_usf; /* bit set */
+ uint32_t m_assigned_tfi[2]; /* bit set */
+ struct gprs_rlcmac_tbf *m_tbfs[2][32];
+};
+
+#ifdef __cplusplus
+
+inline unsigned gprs_rlcmac_pdch::num_tbfs(enum gprs_rlcmac_tbf_direction dir) const
+{
+ return m_num_tbfs[dir];
+}
+
+inline unsigned gprs_rlcmac_pdch::num_reserved(
+ enum gprs_rlcmac_tbf_direction dir) const
+{
+ return gprs_rlcmac_pdch::m_num_reserved[dir];
+}
+
+inline uint8_t gprs_rlcmac_pdch::assigned_usf() const
+{
+ return m_assigned_usf;
+}
+
+inline uint32_t gprs_rlcmac_pdch::assigned_tfi(
+ enum gprs_rlcmac_tbf_direction dir) const
+{
+ return m_assigned_tfi[dir];
+}
+
+inline bool gprs_rlcmac_pdch::is_enabled() const
+{
+ return m_is_enabled;
+}
+
+#endif /* __cplusplus */
diff --git a/src/sba.cpp b/src/sba.cpp
index 5dfdddb..567babe 100644
--- a/src/sba.cpp
+++ b/src/sba.cpp
@@ -23,6 +23,7 @@
#include <gprs_debug.h>
#include <bts.h>
#include <pcu_utils.h>
+#include <pdch.h>
extern "C" {
#include <osmocom/core/logging.h>
diff --git a/src/tbf.cpp b/src/tbf.cpp
index 74f2cd8..72b39ec 100644
--- a/src/tbf.cpp
+++ b/src/tbf.cpp
@@ -32,6 +32,7 @@
#include <sba.h>
#include <gprs_coding_scheme.h>
#include <gsm_timer.h>
+#include <pdch.h>
extern "C" {
#include <osmocom/core/msgb.h>