/* pcu_l1_if.cpp * * Copyright (C) 2012 Andreas Eversberg * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include #include extern "C" { #include #include #include #include #include #include #include #include #include #include } #include #include #include #include #include #include #include // FIXME: move this, when changed from c++ to c. extern "C" { void *l1if_open_pdch(uint8_t trx_no, uint32_t hlayer1, struct gsmtap_inst *gsmtap); int l1if_connect_pdch(void *obj, uint8_t ts); int l1if_pdch_req(void *obj, uint8_t ts, int is_ptcch, uint32_t fn, uint16_t arfcn, uint8_t block_nr, uint8_t *data, uint8_t len); } extern void *tall_pcu_ctx; #define PAGING_GROUP_LEN 3 /* returns [0,999] on success, > 999 on error */ uint16_t imsi2paging_group(const char* imsi) { uint16_t pgroup = 0; size_t len; len = (imsi != NULL) ? strlen(imsi) : 0; if (len < PAGING_GROUP_LEN) return 0xFFFF; imsi += len - PAGING_GROUP_LEN; while (*imsi != '\0') { if (!isdigit(*imsi)) return 0xFFFF; pgroup *= 10; pgroup += *imsi - '0'; imsi++; } return pgroup; } /* * PCU messages */ struct msgb *pcu_msgb_alloc(uint8_t msg_type, uint8_t bts_nr) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; msg = msgb_alloc(sizeof(struct gsm_pcu_if), "pcu_sock_tx"); if (!msg) return NULL; msgb_put(msg, sizeof(struct gsm_pcu_if)); pcu_prim = (struct gsm_pcu_if *) msg->data; pcu_prim->msg_type = msg_type; pcu_prim->bts_nr = bts_nr; return msg; } const struct value_string gsm_pcu_if_text_type_names[] = { OSMO_VALUE_STRING(PCU_VERSION), OSMO_VALUE_STRING(PCU_OML_ALERT), { 0, NULL } }; int pcu_tx_txt_ind(enum gsm_pcu_if_text_type t, const char *fmt, ...) { struct gsm_pcu_if *pcu_prim; struct gsm_pcu_if_txt_ind *txt; va_list ap; char *rep; struct msgb *msg = pcu_msgb_alloc(PCU_IF_MSG_TXT_IND, 0); if (!msg) return -ENOMEM; pcu_prim = (struct gsm_pcu_if *) msg->data; txt = &pcu_prim->u.txt_ind; txt->type = t; va_start(ap, fmt); rep = talloc_vasprintf(tall_pcu_ctx, fmt, ap); va_end(ap); if (!rep) return -ENOMEM; osmo_strlcpy(txt->text, rep, TXT_MAX_LEN); talloc_free(rep); LOGP(DL1IF, LOGL_INFO, "Sending %s TXT as %s to BTS\n", txt->text, get_value_string(gsm_pcu_if_text_type_names, t)); return pcu_sock_send(msg); } static int pcu_tx_act_req(uint8_t trx, uint8_t ts, uint8_t activate) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; struct gsm_pcu_if_act_req *act_req; LOGP(DL1IF, LOGL_INFO, "Sending %s request: trx=%d ts=%d\n", (activate) ? "activate" : "deactivate", trx, ts); msg = pcu_msgb_alloc(PCU_IF_MSG_ACT_REQ, 0); if (!msg) return -ENOMEM; pcu_prim = (struct gsm_pcu_if *) msg->data; act_req = &pcu_prim->u.act_req; act_req->activate = activate; act_req->trx_nr = trx; act_req->ts_nr = ts; return pcu_sock_send(msg); } static int pcu_tx_data_req(uint8_t trx, uint8_t ts, uint8_t sapi, uint16_t arfcn, uint32_t fn, uint8_t block_nr, uint8_t *data, uint8_t len) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; struct gsm_pcu_if_data *data_req; int current_fn = get_current_fn(); LOGP(DL1IF, LOGL_DEBUG, "Sending data request: trx=%d ts=%d sapi=%d " "arfcn=%d fn=%d cur_fn=%d block=%d data=%s\n", trx, ts, sapi, arfcn, fn, current_fn, block_nr, osmo_hexdump(data, len)); msg = pcu_msgb_alloc(PCU_IF_MSG_DATA_REQ, 0); if (!msg) return -ENOMEM; pcu_prim = (struct gsm_pcu_if *) msg->data; data_req = &pcu_prim->u.data_req; data_req->sapi = sapi; data_req->fn = fn; data_req->arfcn = arfcn; data_req->trx_nr = trx; data_req->ts_nr = ts; data_req->block_nr = block_nr; memcpy(data_req->data, data, len); data_req->len = len; return pcu_sock_send(msg); } void pcu_l1if_tx_pdtch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn, uint32_t fn, uint8_t block_nr) { #ifdef ENABLE_DIRECT_PHY struct gprs_rlcmac_bts *bts = bts_main_data(); if (bts->trx[trx].fl1h) { l1if_pdch_req(bts->trx[trx].fl1h, ts, 0, fn, arfcn, block_nr, msg->data, msg->len); msgb_free(msg); return; } #endif pcu_tx_data_req(trx, ts, PCU_IF_SAPI_PDTCH, arfcn, fn, block_nr, msg->data, msg->len); msgb_free(msg); } void pcu_l1if_tx_ptcch(uint8_t trx, uint8_t ts, uint16_t arfcn, uint32_t fn, uint8_t block_nr, uint8_t *data, size_t data_len) { struct gprs_rlcmac_bts *bts = bts_main_data(); if (bts->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_PTCCH)) gsmtap_send(bts->gsmtap, arfcn, ts, GSMTAP_CHANNEL_PTCCH, 0, fn, 0, 0, data, data_len); #ifdef ENABLE_DIRECT_PHY if (bts->trx[trx].fl1h) { l1if_pdch_req(bts->trx[trx].fl1h, ts, 1, fn, arfcn, block_nr, data, data_len); return; } #endif pcu_tx_data_req(trx, ts, PCU_IF_SAPI_PTCCH, arfcn, fn, block_nr, data, data_len); } void pcu_l1if_tx_agch(bitvec * block, int plen) { struct gprs_rlcmac_bts *bts = bts_main_data(); uint8_t data[GSM_MACBLOCK_LEN]; /* prefix PLEN */ /* FIXME: why does OpenBTS has no PLEN and no fill in message? */ bitvec_pack(block, data + 1); data[0] = (plen << 2) | 0x01; if (bts->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_AGCH)) gsmtap_send(bts->gsmtap, 0, 0, GSMTAP_CHANNEL_AGCH, 0, 0, 0, 0, data, GSM_MACBLOCK_LEN); pcu_tx_data_req(0, 0, PCU_IF_SAPI_AGCH, 0, 0, 0, data, GSM_MACBLOCK_LEN); } void pcu_l1if_tx_pch(bitvec * block, int plen, uint16_t pgroup) { struct gprs_rlcmac_bts *bts = bts_main_data(); uint8_t data[PAGING_GROUP_LEN + GSM_MACBLOCK_LEN]; int i; /* prepend paging group */ for (i = 0; i < PAGING_GROUP_LEN; i++) { data[PAGING_GROUP_LEN - 1 - i] = '0' + (char)(pgroup % 10); pgroup = pgroup / 10; } OSMO_ASSERT(pgroup == 0); /* block provided by upper layer comes without first byte (plen), * prepend it manually: */ OSMO_ASSERT(sizeof(data) >= PAGING_GROUP_LEN + 1 + block->data_len); data[3] = (plen << 2) | 0x01; bitvec_pack(block, data + PAGING_GROUP_LEN + 1); if (bts->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_PCH)) gsmtap_send(bts->gsmtap, 0, 0, GSMTAP_CHANNEL_PCH, 0, 0, 0, 0, data + 3, GSM_MACBLOCK_LEN); pcu_tx_data_req(0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, data, PAGING_GROUP_LEN + GSM_MACBLOCK_LEN); } extern "C" void pcu_rx_block_time(uint16_t arfcn, uint32_t fn, uint8_t ts_no) { BTS::main_bts()->set_current_block_frame_number(fn, 0); } extern "C" void pcu_rx_ra_time(uint16_t arfcn, uint32_t fn, uint8_t ts_no) { /* access bursts may arrive some bursts earlier */ BTS::main_bts()->set_current_block_frame_number(fn, 5); } extern "C" int pcu_rx_data_ind_pdtch(uint8_t trx_no, uint8_t ts_no, uint8_t *data, uint8_t len, uint32_t fn, struct pcu_l1_meas *meas) { struct gprs_rlcmac_pdch *pdch; pdch = &bts_main_data()->trx[trx_no].pdch[ts_no]; return pdch->rcv_block(data, len, fn, meas); } static int pcu_rx_data_ind_bcch(uint8_t *data, uint8_t len) { struct gprs_rlcmac_bts *bts = bts_main_data(); if (len == 0) { bts->si13_is_set = false; LOGP(DL1IF, LOGL_INFO, "Received PCU data indication with empty SI13: cache cleaned\n"); return 0; } if (len != GSM_MACBLOCK_LEN) { LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication with SI13 with unexpected length %u\n", len); return -EINVAL; } memcpy(bts->si13, data, GSM_MACBLOCK_LEN); bts->si13_is_set = true; return 0; } static int pcu_rx_data_ind(struct gsm_pcu_if_data *data_ind) { struct gprs_rlcmac_bts *bts = bts_main_data(); int rc; int current_fn = get_current_fn(); pcu_l1_meas meas; uint8_t gsmtap_chantype; LOGP(DL1IF, LOGL_DEBUG, "Data indication received: sapi=%d arfcn=%d " "fn=%d cur_fn=%d block=%d data=%s\n", data_ind->sapi, data_ind->arfcn, data_ind->fn, current_fn, data_ind->block_nr, osmo_hexdump(data_ind->data, data_ind->len)); switch (data_ind->sapi) { case PCU_IF_SAPI_PDTCH: meas.set_rssi(data_ind->rssi); /* convert BER to % value */ meas.set_ber(data_ind->ber10k / 100); meas.set_bto(data_ind->ta_offs_qbits); meas.set_link_qual(data_ind->lqual_cb / 10); LOGP(DL1IF, LOGL_DEBUG, "Data indication with raw measurements received: BER10k = %d, BTO = %d, Q = %d\n", data_ind->ber10k, data_ind->ta_offs_qbits, data_ind->lqual_cb); rc = pcu_rx_data_ind_pdtch(data_ind->trx_nr, data_ind->ts_nr, data_ind->data, data_ind->len, data_ind->fn, &meas); gsmtap_chantype = GSMTAP_CHANNEL_PDTCH; break; case PCU_IF_SAPI_BCCH: rc = pcu_rx_data_ind_bcch(data_ind->data, data_ind->len); gsmtap_chantype = GSMTAP_CHANNEL_BCCH; break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication with " "unsupported sapi %d\n", data_ind->sapi); rc = -EINVAL; gsmtap_chantype = GSMTAP_CHANNEL_UNKNOWN; } if (rc < 0 && (bts->gsmtap_categ_mask & (1 <gsmtap, data_ind->arfcn | GSMTAP_ARFCN_F_UPLINK, data_ind->ts_nr, gsmtap_chantype, 0, data_ind->fn, meas.rssi, meas.link_qual, data_ind->data, data_ind->len); } return rc; } static int pcu_rx_data_cnf(struct gsm_pcu_if_data *data_cnf) { int rc = 0; int current_fn = get_current_fn(); LOGP(DL1IF, LOGL_DEBUG, "Data confirm received: sapi=%d fn=%d cur_fn=%d\n", data_cnf->sapi, data_cnf->fn, current_fn); switch (data_cnf->sapi) { case PCU_IF_SAPI_PCH: if (data_cnf->data[2] == 0x3f) BTS::main_bts()->rcv_imm_ass_cnf(data_cnf->data, data_cnf->fn); break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU data confirm with " "unsupported sapi %d\n", data_cnf->sapi); rc = -EINVAL; } return rc; } // FIXME: remove this, when changed from c++ to c. extern "C" int pcu_rx_rts_req_pdtch(uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr) { return gprs_rlcmac_rcv_rts_block(bts_main_data(), trx, ts, fn, block_nr); } extern "C" int pcu_rx_rts_req_ptcch(uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr) { struct gprs_rlcmac_bts *bts = bts_main_data(); struct gprs_rlcmac_pdch *pdch; /* Prevent buffer overflow */ if (trx >= ARRAY_SIZE(bts->trx) || ts >= 8) return -EINVAL; /* Make sure PDCH time-slot is enabled */ pdch = &bts->trx[trx].pdch[ts]; if (!pdch->m_is_enabled) return -EAGAIN; pcu_l1if_tx_ptcch(trx, ts, bts->trx[trx].arfcn, fn, block_nr, pdch->ptcch_msg, GSM_MACBLOCK_LEN); return 0; } static int pcu_rx_rts_req(struct gsm_pcu_if_rts_req *rts_req) { int rc = 0; int current_fn = get_current_fn(); LOGP(DL1IF, LOGL_DEBUG, "RTS request received: trx=%d ts=%d sapi=%d " "arfcn=%d fn=%d cur_fn=%d block=%d\n", rts_req->trx_nr, rts_req->ts_nr, rts_req->sapi, rts_req->arfcn, rts_req->fn, current_fn, rts_req->block_nr); switch (rts_req->sapi) { case PCU_IF_SAPI_PDTCH: pcu_rx_rts_req_pdtch(rts_req->trx_nr, rts_req->ts_nr, rts_req->fn, rts_req->block_nr); break; case PCU_IF_SAPI_PTCCH: pcu_rx_rts_req_ptcch(rts_req->trx_nr, rts_req->ts_nr, rts_req->fn, rts_req->block_nr); break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU RTS request with " "unsupported sapi %d\n", rts_req->sapi); rc = -EINVAL; } return rc; } /* C -> C++ adapter for direct DSP access code (e.g. osmo-bts-sysmo) */ extern "C" int pcu_rx_rach_ind_ptcch(uint8_t trx_nr, uint8_t ts_nr, uint32_t fn, int16_t qta) { struct rach_ind_params rip = { /* The content of RA is not of interest on PTCCH/U */ .burst_type = GSM_L1_BURST_TYPE_ACCESS_0, .is_11bit = false, .ra = 0x00, .trx_nr = trx_nr, .ts_nr = ts_nr, .rfn = fn, .qta = qta, }; return BTS::main_bts()->rcv_ptcch_rach(&rip); } static int pcu_rx_rach_ind(const struct gsm_pcu_if_rach_ind *rach_ind) { int rc = 0; int current_fn = get_current_fn(); LOGP(DL1IF, LOGL_INFO, "RACH request received: sapi=%d " "qta=%d, ra=0x%02x, fn=%u, cur_fn=%d, is_11bit=%d\n", rach_ind->sapi, rach_ind->qta, rach_ind->ra, rach_ind->fn, current_fn, rach_ind->is_11bit); struct rach_ind_params rip = { .burst_type = (enum ph_burst_type) rach_ind->burst_type, .is_11bit = rach_ind->is_11bit > 0, .ra = rach_ind->ra, .trx_nr = rach_ind->trx_nr, .ts_nr = rach_ind->ts_nr, .rfn = rach_ind->fn, .qta = rach_ind->qta, }; switch (rach_ind->sapi) { case PCU_IF_SAPI_RACH: rc = BTS::main_bts()->rcv_rach(&rip); break; case PCU_IF_SAPI_PTCCH: rc = BTS::main_bts()->rcv_ptcch_rach(&rip); break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU rach request with " "unsupported sapi %d\n", rach_ind->sapi); rc = -EINVAL; } return rc; } static int pcu_rx_info_ind(const struct gsm_pcu_if_info_ind *info_ind) { struct gprs_rlcmac_bts *bts = bts_main_data(); struct gprs_bssgp_pcu *pcu; struct in_addr ia; int rc = 0; unsigned int trx_nr, ts_nr; int i; if (info_ind->version != PCU_IF_VERSION) { fprintf(stderr, "PCU interface version number of BTS (%u) is " "different (%u).\nPlease re-compile!\n", info_ind->version, PCU_IF_VERSION); exit(-1); } LOGP(DL1IF, LOGL_DEBUG, "Info indication received:\n"); if (!(info_ind->flags & PCU_IF_FLAG_ACTIVE)) { LOGP(DL1IF, LOGL_NOTICE, "BTS not available\n"); if (!bts->active) return -EAGAIN; bssgp_failed: bts->active = false; /* free all TBF */ for (trx_nr = 0; trx_nr < ARRAY_SIZE(bts->trx); trx_nr++) { bts->trx[trx_nr].arfcn = info_ind->trx[trx_nr].arfcn; for (ts_nr = 0; ts_nr < ARRAY_SIZE(bts->trx[0].pdch); ts_nr++) bts->trx[trx_nr].pdch[ts_nr].free_resources(); } gprs_bssgp_destroy(); exit(0); } LOGP(DL1IF, LOGL_INFO, "BTS available\n"); LOGP(DL1IF, LOGL_DEBUG, " mcc=%03u\n", info_ind->mcc); LOGP(DL1IF, LOGL_DEBUG, " mnc=%0*u\n", info_ind->mnc_3_digits, info_ind->mnc); LOGP(DL1IF, LOGL_DEBUG, " lac=%d\n", info_ind->lac); LOGP(DL1IF, LOGL_DEBUG, " rac=%d\n", info_ind->rac); LOGP(DL1IF, LOGL_DEBUG, " cell_id=%d\n", info_ind->cell_id); LOGP(DL1IF, LOGL_DEBUG, " bsic=%d\n", info_ind->bsic); LOGP(DL1IF, LOGL_DEBUG, " nsei=%d\n", info_ind->nsei); LOGP(DL1IF, LOGL_DEBUG, " nse_timer=%d %d %d %d %d %d %d\n", info_ind->nse_timer[0], info_ind->nse_timer[1], info_ind->nse_timer[2], info_ind->nse_timer[3], info_ind->nse_timer[4], info_ind->nse_timer[5], info_ind->nse_timer[6]); LOGP(DL1IF, LOGL_DEBUG, " cell_timer=%d %d %d %d %d %d %d %d %d %d " "%d\n", info_ind->cell_timer[0], info_ind->cell_timer[1], info_ind->cell_timer[2], info_ind->cell_timer[3], info_ind->cell_timer[4], info_ind->cell_timer[5], info_ind->cell_timer[6], info_ind->cell_timer[7], info_ind->cell_timer[8], info_ind->cell_timer[9], info_ind->cell_timer[10]); LOGP(DL1IF, LOGL_DEBUG, " repeat_time=%d\n", info_ind->repeat_time); LOGP(DL1IF, LOGL_DEBUG, " repeat_count=%d\n", info_ind->repeat_count); LOGP(DL1IF, LOGL_DEBUG, " bvci=%d\n", info_ind->bvci); LOGP(DL1IF, LOGL_DEBUG, " t3142=%d\n", info_ind->t3142); LOGP(DL1IF, LOGL_DEBUG, " t3169=%d\n", info_ind->t3169); LOGP(DL1IF, LOGL_DEBUG, " t3191=%d\n", info_ind->t3191); LOGP(DL1IF, LOGL_DEBUG, " t3193=%d (ms)\n", info_ind->t3193_10ms * 10); LOGP(DL1IF, LOGL_DEBUG, " t3195=%d\n", info_ind->t3195); LOGP(DL1IF, LOGL_DEBUG, " n3101=%d\n", info_ind->n3101); LOGP(DL1IF, LOGL_DEBUG, " n3103=%d\n", info_ind->n3103); LOGP(DL1IF, LOGL_DEBUG, " n3105=%d\n", info_ind->n3105); LOGP(DL1IF, LOGL_DEBUG, " cv_countdown=%d\n", info_ind->cv_countdown); LOGP(DL1IF, LOGL_DEBUG, " dl_tbf_ext=%d\n", info_ind->dl_tbf_ext); LOGP(DL1IF, LOGL_DEBUG, " ul_tbf_ext=%d\n", info_ind->ul_tbf_ext); bts->bsic = info_ind->bsic; for (i = 0; i < 4; i++) { if ((info_ind->flags & (PCU_IF_FLAG_CS1 << i))) LOGP(DL1IF, LOGL_DEBUG, " Use CS%d\n", i+1); } for (i = 0; i < 9; i++) { if ((info_ind->flags & (PCU_IF_FLAG_MCS1 << i))) LOGP(DL1IF, LOGL_DEBUG, " Use MCS%d\n", i+1); } LOGP(DL1IF, LOGL_DEBUG, " initial_cs=%d\n", info_ind->initial_cs); LOGP(DL1IF, LOGL_DEBUG, " initial_mcs=%d\n", info_ind->initial_mcs); LOGP(DL1IF, LOGL_DEBUG, " nsvci=%d\n", info_ind->nsvci[0]); LOGP(DL1IF, LOGL_DEBUG, " local_port=%d\n", info_ind->local_port[0]); LOGP(DL1IF, LOGL_DEBUG, " remote_port=%d\n", info_ind->remote_port[0]); ia.s_addr = info_ind->remote_ip[0].v4.s_addr; LOGP(DL1IF, LOGL_DEBUG, " remote_ip=%s\n", inet_ntoa(ia)); switch (info_ind->address_type[0]) { case PCU_IF_ADDR_TYPE_IPV4: break; case PCU_IF_ADDR_TYPE_IPV6: LOGP(DL1IF, LOGL_ERROR, "This PCU does not support IPv6 NSVC!\n"); goto bssgp_failed; default: LOGP(DL1IF, LOGL_ERROR, "No IPv4 NSVC given!\n"); goto bssgp_failed; } pcu = gprs_bssgp_create_and_connect(bts, info_ind->local_port[0], ntohl(info_ind->remote_ip[0].v4.s_addr), info_ind->remote_port[0], info_ind->nsei, info_ind->nsvci[0], info_ind->bvci, info_ind->mcc, info_ind->mnc, info_ind->mnc_3_digits, info_ind->lac, info_ind->rac, info_ind->cell_id); if (!pcu) { LOGP(DL1IF, LOGL_NOTICE, "SGSN is not available\n"); goto bssgp_failed; } bts->cs1 = !!(info_ind->flags & PCU_IF_FLAG_CS1); bts->cs2 = !!(info_ind->flags & PCU_IF_FLAG_CS2); bts->cs3 = !!(info_ind->flags & PCU_IF_FLAG_CS3); bts->cs4 = !!(info_ind->flags & PCU_IF_FLAG_CS4); if (!bts->cs1 && !bts->cs2 && !bts->cs3 && !bts->cs4) bts->cs1 = 1; if (info_ind->t3142) { /* if timer values are set */ osmo_tdef_set(bts->T_defs_bts, 3142, info_ind->t3142, OSMO_TDEF_S); osmo_tdef_set(bts->T_defs_bts, 3169, info_ind->t3169, OSMO_TDEF_S); osmo_tdef_set(bts->T_defs_bts, 3191, info_ind->t3191, OSMO_TDEF_S); osmo_tdef_set(bts->T_defs_bts, 3193, info_ind->t3193_10ms * 10, OSMO_TDEF_MS); osmo_tdef_set(bts->T_defs_bts, 3195, info_ind->t3195, OSMO_TDEF_S); bts->n3101 = info_ind->n3101; bts->n3103 = info_ind->n3103; bts->n3105 = info_ind->n3105; } if (!bts->force_cs) { if (info_ind->initial_cs < 1 || info_ind->initial_cs > 4) bts->initial_cs_dl = 1; else bts->initial_cs_dl = info_ind->initial_cs; bts->initial_cs_ul = bts->initial_cs_dl; } for (trx_nr = 0; trx_nr < ARRAY_SIZE(bts->trx); trx_nr++) { bts->trx[trx_nr].arfcn = info_ind->trx[trx_nr].arfcn; if ((info_ind->flags & PCU_IF_FLAG_SYSMO) && info_ind->trx[trx_nr].hlayer1) { #ifdef ENABLE_DIRECT_PHY LOGP(DL1IF, LOGL_DEBUG, " TRX %d hlayer1=%x\n", trx_nr, info_ind->trx[trx_nr].hlayer1); if (!bts->trx[trx_nr].fl1h) bts->trx[trx_nr].fl1h = l1if_open_pdch( trx_nr, info_ind->trx[trx_nr].hlayer1, bts->gsmtap); if (!bts->trx[trx_nr].fl1h) { LOGP(DL1IF, LOGL_FATAL, "Failed to open direct " "DSP access for PDCH.\n"); exit(0); } #else LOGP(DL1IF, LOGL_FATAL, "Compiled without direct DSP " "access for PDCH, but enabled at " "BTS. Please deactivate it!\n"); exit(0); #endif } for (ts_nr = 0; ts_nr < ARRAY_SIZE(bts->trx[0].pdch); ts_nr++) { const struct gsm_pcu_if_info_ts *its = &info_ind->trx[trx_nr].ts[ts_nr]; struct gprs_rlcmac_pdch *pdch = &bts->trx[trx_nr].pdch[ts_nr]; if ((info_ind->trx[trx_nr].pdch_mask & (1 << ts_nr))) { /* FIXME: activate dynamically at RLCMAC */ if (!pdch->is_enabled()) { #ifdef ENABLE_DIRECT_PHY if ((info_ind->flags & PCU_IF_FLAG_SYSMO)) l1if_connect_pdch( bts->trx[trx_nr].fl1h, ts_nr); #endif pcu_tx_act_req(trx_nr, ts_nr, 1); pdch->enable(); } pdch->tsc = its->tsc; /* (Optional) frequency hopping parameters */ if (its->h) { pdch->fh.enabled = true; pdch->fh.maio = its->maio; pdch->fh.hsn = its->hsn; OSMO_ASSERT(its->ma_bit_len <= sizeof(pdch->fh.ma) * 8); pdch->fh.ma_oct_len = OSMO_BYTES_FOR_BITS(its->ma_bit_len); pdch->fh.ma_bit_len = its->ma_bit_len; /* Mobile Allocation + padding (byte/bit order as on the wire): * | 00 00 00 00 00 cc bb aa | -> | cc bb aa 00 00 00 00 00 | */ unsigned int offset = sizeof(pdch->fh.ma) - pdch->fh.ma_oct_len; memcpy(pdch->fh.ma, its->ma + offset, pdch->fh.ma_oct_len); } LOGP(DL1IF, LOGL_INFO, "PDCH (trx=%u, ts=%u): tsc=%u, hopping=%s\n", trx_nr, ts_nr, pdch->tsc, pdch->fh.enabled ? "yes" : "no"); } else { if (pdch->is_enabled()) { pcu_tx_act_req(trx_nr, ts_nr, 0); pdch->free_resources(); pdch->disable(); } } } } bts->active = true; return rc; } static int pcu_rx_time_ind(struct gsm_pcu_if_time_ind *time_ind) { uint8_t fn13 = time_ind->fn % 13; /* omit frame numbers not starting at a MAC block */ if (fn13 != 0 && fn13 != 4 && fn13 != 8) return 0; LOGP(DL1IF, LOGL_DEBUG, "Time indication received: %d\n", time_ind->fn % 52); BTS::main_bts()->set_current_frame_number(time_ind->fn); return 0; } static int pcu_rx_pag_req(struct gsm_pcu_if_pag_req *pag_req) { struct osmo_mobile_identity mi; int rc; LOGP(DL1IF, LOGL_DEBUG, "Paging request received: chan_needed=%d " "length=%d\n", pag_req->chan_needed, pag_req->identity_lv[0]); /* check if identity does not fit: length > sizeof(lv) - 1 */ if (pag_req->identity_lv[0] >= sizeof(pag_req->identity_lv)) { LOGP(DL1IF, LOGL_ERROR, "Paging identity too large (%" PRIu8 ")\n", pag_req->identity_lv[0]); return -EINVAL; } rc = osmo_mobile_identity_decode(&mi, &pag_req->identity_lv[1], pag_req->identity_lv[0], true); if (rc < 0) { LOGP(DL1IF, LOGL_ERROR, "Failed to decode Mobile Identity in Paging Request (rc=%d)\n", rc); return -EINVAL; } return BTS::main_bts()->add_paging(pag_req->chan_needed, &mi); } static int pcu_rx_susp_req(struct gsm_pcu_if_susp_req *susp_req) { struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx(); struct gprs_ra_id ra_id; gsm48_parse_ra(&ra_id, susp_req->ra_id); LOGP(DL1IF, LOGL_INFO, "GPRS Suspend request received: TLLI=0x%08x RAI=%s\n", susp_req->tlli, osmo_rai_name(&ra_id)); if (!bctx) return -1; return bssgp_tx_suspend(bctx->nsei, susp_req->tlli, &ra_id); } static int pcu_rx_app_info_req(struct gsm_pcu_if_app_info_req *app_info_req) { LListHead *ms_iter; BTS *bts = BTS::main_bts(); struct gprs_rlcmac_bts *bts_data = bts->bts_data(); LOGP(DL1IF, LOGL_DEBUG, "Application Information Request received: type=0x%08x len=%i\n", app_info_req->application_type, app_info_req->len); bts_data->app_info_pending = 0; llist_for_each(ms_iter, &bts->ms_store().ms_list()) { GprsMs *ms = ms_iter->entry(); if (!ms->dl_tbf()) continue; bts_data->app_info_pending++; ms->app_info_pending = true; } if (!bts_data->app_info_pending) { LOGP(DL1IF, LOGL_NOTICE, "Packet Application Information will not be sent, no subscribers with active" " TBF\n"); return -1; } if (bts_data->app_info) { LOGP(DL1IF, LOGL_NOTICE, "Previous Packet Application Information was not sent to all subscribers," " overwriting with new one\n"); msgb_free(bts_data->app_info); } LOGP(DL1IF, LOGL_INFO, "Sending Packet Application Information to %i subscribers with active TBF\n", bts_data->app_info_pending); bts_data->app_info = gprs_rlcmac_app_info_msg(app_info_req); return 0; } int pcu_rx(uint8_t msg_type, struct gsm_pcu_if *pcu_prim) { int rc = 0; switch (msg_type) { case PCU_IF_MSG_DATA_IND: rc = pcu_rx_data_ind(&pcu_prim->u.data_ind); break; case PCU_IF_MSG_DATA_CNF: rc = pcu_rx_data_cnf(&pcu_prim->u.data_cnf); break; case PCU_IF_MSG_RTS_REQ: rc = pcu_rx_rts_req(&pcu_prim->u.rts_req); break; case PCU_IF_MSG_RACH_IND: rc = pcu_rx_rach_ind(&pcu_prim->u.rach_ind); break; case PCU_IF_MSG_INFO_IND: rc = pcu_rx_info_ind(&pcu_prim->u.info_ind); break; case PCU_IF_MSG_TIME_IND: rc = pcu_rx_time_ind(&pcu_prim->u.time_ind); break; case PCU_IF_MSG_PAG_REQ: rc = pcu_rx_pag_req(&pcu_prim->u.pag_req); break; case PCU_IF_MSG_SUSP_REQ: rc = pcu_rx_susp_req(&pcu_prim->u.susp_req); break; case PCU_IF_MSG_APP_INFO_REQ: rc = pcu_rx_app_info_req(&pcu_prim->u.app_info_req); break; default: LOGP(DL1IF, LOGL_ERROR, "Received unknown PCU msg type %d\n", msg_type); rc = -EINVAL; } return rc; }