diff options
Diffstat (limited to 'src/tbf.cpp')
| -rw-r--r-- | src/tbf.cpp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/tbf.cpp b/src/tbf.cpp index 53117bff..c640c8d2 100644 --- a/src/tbf.cpp +++ b/src/tbf.cpp @@ -36,6 +36,7 @@ extern "C" { /* If acknowledgement to downlink assignment should be polled */ #define POLLING_ASSIGNMENT_DL 1 +#define POLLING_ASSIGNMENT_UL 1 extern "C" { int bssgp_tx_llc_discarded(struct bssgp_bvc_ctx *bctx, uint32_t tlli, @@ -973,6 +974,78 @@ struct msgb *gprs_rlcmac_tbf::create_dl_ass(uint32_t fn) return msg; } +struct msgb *gprs_rlcmac_tbf::create_ul_ass(uint32_t fn) +{ + struct msgb *msg; + struct gprs_rlcmac_tbf *new_tbf; + +#if POLLING_ASSIGNMENT_UL == 1 + if (poll_state != GPRS_RLCMAC_POLL_NONE) { + LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already " + "sheduled for TBF=%d, so we must wait for uplink " + "assignment...\n", tfi); + return NULL; + } + if (bts->sba()->find(trx_no, control_ts, (fn + 13) % 2715648)) { + LOGP(DRLCMACUL, LOGL_DEBUG, "Polling is already scheduled for " + "single block allocation...\n"); + return NULL; + } +#endif + + /* on down TBF we get the uplink TBF to be assigned. */ +#warning "Probably want to find by IMSI too" + if (direction == GPRS_RLCMAC_DL_TBF) + new_tbf = bts->tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF); + else + new_tbf = this; + + if (!new_tbf) { + LOGP(DRLCMACUL, LOGL_ERROR, "We have a schedule for uplink " + "assignment at downlink TBF=%d, but there is no uplink " + "TBF\n", tfi); + ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; + 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"); + Encoding::write_packet_uplink_assignment(bts_data(), ass_vec, tfi, + (direction == GPRS_RLCMAC_DL_TBF), tlli, + tlli_valid, new_tbf, POLLING_ASSIGNMENT_UL, bts_data()->alpha, + bts_data()->gamma, -1); + 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 POLLING_ASSIGNMENT_UL == 1 + poll_state = GPRS_RLCMAC_POLL_SCHED; + poll_fn = (fn + 13) % 2715648; + ul_ass_state = GPRS_RLCMAC_UL_ASS_WAIT_ACK; +#else + ul_ass_state = GPRS_RLCMAC_UL_ASS_NONE; + tbf_new_state(new_tbf, GPRS_RLCMAC_FLOW); + tbf_assign_control_ts(new_tbf); +#endif + debug_diagram(bts, diag, "send UL-ASS"); + + return msg; +} + struct msgb *gprs_rlcmac_tbf::create_ul_ack(uint32_t fn) { int final = (state_is(GPRS_RLCMAC_FINISHED)); |