/* 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. */ #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 #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 */ /* Can be used to allocate message with non-variable size */ 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; } /* Allocate message with extra size, only reserve pcuif msg hdr */ static struct msgb *pcu_msgb_alloc_ext_size(uint8_t msg_type, uint8_t bts_nr, size_t extra_size) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; msg = msgb_alloc(sizeof(struct gsm_pcu_if) + extra_size, "pcu_sock_tx"); /* Only header is filled, caller is responible for reserving + filling * message type specific contents: */ msgb_put(msg, PCUIF_HDR_SIZE); pcu_prim = (struct gsm_pcu_if *) msgb_data(msg); 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(struct gprs_rlcmac_bts *bts, const struct gprs_rlcmac_pdch *pdch, uint8_t activate) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; struct gsm_pcu_if_act_req *act_req; LOGPDCH(pdch, DL1IF, LOGL_INFO, "Sending %s request\n", (activate) ? "activate" : "deactivate"); msg = pcu_msgb_alloc(PCU_IF_MSG_ACT_REQ, bts->nr); 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 = pdch->trx_no(); act_req->ts_nr = pdch->ts_no; return pcu_sock_send(msg); } static int pcu_tx_data_req(struct gprs_rlcmac_bts *bts, 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 = bts_current_frame_number(bts); LOGP(DL1IF, LOGL_DEBUG, "(bts=%u,trx=%u,ts=%u) FN=%u Sending data request: sapi=%d " "arfcn=%d cur_fn=%d block=%d data=%s\n", bts->nr, trx, ts, fn, sapi, arfcn, current_fn, block_nr, osmo_hexdump(data, len)); msg = pcu_msgb_alloc(PCU_IF_MSG_DATA_REQ, bts->nr); 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; if (len) memcpy(data_req->data, data, len); data_req->len = len; return pcu_sock_send(msg); } void pcu_l1if_tx_pdtch(msgb *msg, struct gprs_rlcmac_bts *bts, uint8_t trx, uint8_t ts, uint16_t arfcn, uint32_t fn, uint8_t block_nr) { #ifdef ENABLE_DIRECT_PHY if (bts->trx[trx].fl1h) { if (!msg) /* Simply skip sending idle frames to L1 */ return; l1if_pdch_req(bts->trx[trx].fl1h, ts, 0, fn, arfcn, block_nr, msg->data, msg->len); msgb_free(msg); return; } #endif if (!msg) { pcu_tx_data_req(bts, trx, ts, PCU_IF_SAPI_PDTCH, arfcn, fn, block_nr, NULL, 0); return; } pcu_tx_data_req(bts, trx, ts, PCU_IF_SAPI_PDTCH, arfcn, fn, block_nr, msg->data, msg->len); msgb_free(msg); } void pcu_l1if_tx_ptcch(struct gprs_rlcmac_bts *bts, uint8_t trx, uint8_t ts, uint16_t arfcn, uint32_t fn, uint8_t block_nr, uint8_t *data, size_t data_len) { if (the_pcu->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_PTCCH)) gsmtap_send(the_pcu->gsmtap, arfcn, ts, GSMTAP_CHANNEL_PTCCH, 0, fn, 0, 0, data, data_len); #ifdef ENABLE_DIRECT_PHY if (bts->trx[trx].fl1h) { if (!data_len) /* Simply skip sending idle frames to L1 */ return; l1if_pdch_req(bts->trx[trx].fl1h, ts, 1, fn, arfcn, block_nr, data, data_len); return; } #endif if (!data_len) { pcu_tx_data_req(bts, trx, ts, PCU_IF_SAPI_PTCCH, arfcn, fn, block_nr, NULL, 0); return; } pcu_tx_data_req(bts, trx, ts, PCU_IF_SAPI_PTCCH, arfcn, fn, block_nr, data, data_len); } void pcu_l1if_tx_agch(struct gprs_rlcmac_bts *bts, bitvec * block, int plen) { 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 (the_pcu->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_AGCH)) gsmtap_send(the_pcu->gsmtap, 0, 0, GSMTAP_CHANNEL_AGCH, 0, 0, 0, 0, data, GSM_MACBLOCK_LEN); pcu_tx_data_req(bts, 0, 0, PCU_IF_SAPI_AGCH, 0, 0, 0, data, GSM_MACBLOCK_LEN); } void pcu_l1if_tx_pch(struct gprs_rlcmac_bts *bts, bitvec * block, int plen, uint16_t pgroup) { 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 (the_pcu->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_PCH)) gsmtap_send(the_pcu->gsmtap, 0, 0, GSMTAP_CHANNEL_PCH, 0, 0, 0, 0, data + 3, GSM_MACBLOCK_LEN); pcu_tx_data_req(bts, 0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, data, PAGING_GROUP_LEN + GSM_MACBLOCK_LEN); } int pcu_tx_neigh_addr_res_req(struct gprs_rlcmac_bts *bts, const struct neigh_cache_entry_key *neigh_key) { struct msgb *msg; struct gsm_pcu_if *pcu_prim; struct gsm_pcu_if_neigh_addr_req *naddr_req; LOGP(DL1IF, LOGL_DEBUG, "(bts=%u) Tx Neighbor Address Resolution Request: " NEIGH_CACHE_ENTRY_KEY_FMT "\n", bts->nr, NEIGH_CACHE_ENTRY_KEY_ARGS(neigh_key)); msg = pcu_msgb_alloc_ext_size(PCU_IF_MSG_CONTAINER, bts->nr, sizeof(struct gsm_pcu_if_neigh_addr_req)); if (!msg) return -ENOMEM; pcu_prim = (struct gsm_pcu_if *) msgb_data(msg); naddr_req = (struct gsm_pcu_if_neigh_addr_req *)&pcu_prim->u.container.data[0]; msgb_put(msg, sizeof(pcu_prim->u.container) + sizeof(struct gsm_pcu_if_neigh_addr_req)); pcu_prim->u.container.msg_type = PCU_IF_MSG_NEIGH_ADDR_REQ; osmo_store16be(sizeof(struct gsm_pcu_if_neigh_addr_req), &pcu_prim->u.container.length); osmo_store16be(neigh_key->local_lac, &naddr_req->local_lac); osmo_store16be(neigh_key->local_ci, &naddr_req->local_ci); osmo_store16be(neigh_key->tgt_arfcn, &naddr_req->tgt_arfcn); naddr_req->tgt_bsic = neigh_key->tgt_bsic; return pcu_sock_send(msg); } void pcu_rx_block_time(struct gprs_rlcmac_bts *bts, uint16_t arfcn, uint32_t fn, uint8_t ts_no) { bts_set_current_block_frame_number(bts, fn); } int pcu_rx_data_ind_pdtch(struct gprs_rlcmac_bts *bts, struct gprs_rlcmac_pdch *pdch, uint8_t *data, uint8_t len, uint32_t fn, struct pcu_l1_meas *meas) { int rc; if (!pdch->is_enabled()) { LOGPDCH(pdch, DL1IF, LOGL_INFO, "Received DATA.ind (PDTCH) on disabled TS\n"); return -EINVAL; } rc = pdch->rcv_block(data, len, fn, meas); pdch_ulc_expire_fn(pdch->ulc, fn); return rc; } static int list_arfcn(const struct gprs_rlcmac_bts *bts, const struct gsm_sysinfo_freq *freq, const char *text) { int n = 0, i; for (i = 0; i < 1024; i++) { if (freq[i].mask) { if (!n) LOGP(DL1IF, LOGL_INFO, "BTS%d: %s", bts->nr, text); LOGPC(DL1IF, LOGL_INFO, " %d", i); n++; } } if (n) LOGPC(DL1IF, LOGL_INFO, "\n"); return n; } static int pcu_rx_data_ind_bcch(struct gprs_rlcmac_bts *bts, uint8_t *data, uint8_t len) { struct gsm48_system_information_type_2 *si2; const uint8_t *si_ro; switch (len) { case 0: /* Due to historical reasons also accept a completely empty message as * revoke command for SI13. */ LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication that contains no data -- Revoked SI13.\n"); bts->si13_is_set = false; return 0; case 1: /* Revoke SI, type is identified by a single byte which is coded after * enum osmo_sysinfo_type. */ switch (data[0]) { case SYSINFO_TYPE_1: bts->si1_is_set = false; break; case SYSINFO_TYPE_2: bts->si2_is_set = false; break; case SYSINFO_TYPE_3: bts->si3_is_set = false; break; case SYSINFO_TYPE_13: bts->si13_is_set = false; break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication that contains an unsupported system information identifier (%02x,OSMO) -- ignored.\n", data[0]); return -EINVAL; } LOGP(DPCU, LOGL_DEBUG, "Received PCU data indication: Revoked SI%s\n", get_value_string(osmo_sitype_strs, data[0])); return 0; case GSM_MACBLOCK_LEN: /* Update SI, type is identified by the RR sysinfo type, which is the * 3rd byte in the buffer. */ switch (data[2]) { case GSM48_MT_RR_SYSINFO_1: memcpy(bts->si1, data, GSM_MACBLOCK_LEN); bts->si1_is_set = true; break; case GSM48_MT_RR_SYSINFO_2: memcpy(bts->si2, data, GSM_MACBLOCK_LEN); bts->si2_is_set = true; si2 = (struct gsm48_system_information_type_2 *)bts->si2; gsm48_decode_freq_list(bts->si2_bcch_cell_list, si2->bcch_frequency_list, sizeof(si2->bcch_frequency_list), 0xce, 1); list_arfcn(bts, bts->si2_bcch_cell_list, "SI2 Neighbour cells in same band:"); break; case GSM48_MT_RR_SYSINFO_3: memcpy(bts->si3, data, GSM_MACBLOCK_LEN); bts->si3_is_set = true; break; case GSM48_MT_RR_SYSINFO_13: memcpy(bts->si13, data, GSM_MACBLOCK_LEN); bts->si13_is_set = true; si_ro = ((struct gsm48_system_information_type_13*)data)->rest_octets; if (osmo_gsm48_rest_octets_si13_decode(&bts->si13_ro_decoded, si_ro) < 0) LOGP(DPCU, LOGL_ERROR, "Error decoding SI13\n"); break; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication that contains an unsupported system information identifier (%02x,RR) -- ignored.\n", data[2]); return -EINVAL; } LOGP(DPCU, LOGL_DEBUG, "Received PCU data indication: Updated %s: %s\n", gsm48_pdisc_msgtype_name(data[1], data[2]), osmo_hexdump_nospc(data + 1, GSM_MACBLOCK_LEN)); return 0; default: LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication with unexpected data length: %u -- ignored.\n", len); return -EINVAL; } } static int pcu_rx_data_ind(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_data *data_ind) { int rc; int current_fn = bts_current_frame_number(bts); struct pcu_l1_meas meas = {0}; struct gprs_rlcmac_pdch *pdch; uint8_t gsmtap_chantype; LOGP(DL1IF, LOGL_DEBUG, "(bts=%" PRIu8 ",trx=%" PRIu8 ",ts=%" PRIu8 ") FN=%u " "Rx DATA.ind: sapi=%d arfcn=%d cur_fn=%d " "block=%d data=%s\n", bts->nr, data_ind->trx_nr, data_ind->ts_nr, data_ind->fn, data_ind->sapi, data_ind->arfcn, current_fn, data_ind->block_nr, osmo_hexdump(data_ind->data, data_ind->len)); switch (data_ind->sapi) { case PCU_IF_SAPI_PDTCH: pdch = &bts->trx[data_ind->trx_nr].pdch[data_ind->ts_nr]; pcu_l1_meas_set_rssi(&meas, data_ind->rssi); /* convert BER to % value */ pcu_l1_meas_set_ber(&meas, data_ind->ber10k / 100); pcu_l1_meas_set_bto(&meas, data_ind->ta_offs_qbits); pcu_l1_meas_set_link_qual(&meas, data_ind->lqual_cb / 10); LOGPDCH(pdch, DL1IF, LOGL_DEBUG, "FN=%u Rx DATA.ind PDTCH: " "BER10k = %d, BTO = %d, Q = %d\n", data_ind->fn, data_ind->ber10k, data_ind->ta_offs_qbits, data_ind->lqual_cb); rc = pcu_rx_data_ind_pdtch(bts, pdch, 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(bts, data_ind->data, data_ind->len); gsmtap_chantype = GSMTAP_CHANNEL_BCCH; break; default: LOGP(DL1IF, LOGL_ERROR, "(bts=%" PRIu8 ",trx=%" PRIu8 ",ts=%" PRIu8 ") " "FN=%u Rx DATA.ind with unsupported sapi %d\n", bts->nr, data_ind->trx_nr, data_ind->ts_nr, data_ind->fn, data_ind->sapi); rc = -EINVAL; gsmtap_chantype = GSMTAP_CHANNEL_UNKNOWN; } if (rc < 0 && (the_pcu->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 gprs_rlcmac_bts *bts, struct gsm_pcu_if_data *data_cnf) { int rc = 0; int current_fn = bts_current_frame_number(bts); 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_rcv_imm_ass_cnf(bts, 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. int pcu_rx_rts_req_pdtch(struct gprs_rlcmac_bts *bts, uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr) { return gprs_rlcmac_rcv_rts_block(bts, trx, ts, fn, block_nr); } int pcu_rx_rts_req_ptcch(struct gprs_rlcmac_bts *bts, uint8_t trx, uint8_t ts, uint32_t fn, uint8_t block_nr) { 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_is_enabled(pdch)) return -EAGAIN; /* If there's no TBF attached to this PDCH, we can skip Tx of PTCCH * since there's nothing worthy of being transmitted. This way BTS can * identify idle blocks and send nothing or dumy blocks with reduced * energy for the sake of energy saving. */ const unsigned num_tbfs = pdch->num_tbfs(GPRS_RLCMAC_DL_TBF) + pdch->num_tbfs(GPRS_RLCMAC_UL_TBF); bool skip_idle = (num_tbfs == 0); #ifdef ENABLE_DIRECT_PHY /* In DIRECT_PHY mode we want to always submit something to L1 in * TRX0, since BTS is not preparing dummy bursts on idle TS for us: */ skip_idle = skip_idle && trx != 0; #endif if (skip_idle) { pcu_l1if_tx_ptcch(bts, trx, ts, bts->trx[trx].arfcn, fn, block_nr, NULL, 0); return 0; } pcu_l1if_tx_ptcch(bts, trx, ts, bts->trx[trx].arfcn, fn, block_nr, pdch->ptcch_msg, GSM_MACBLOCK_LEN); return 0; } static int pcu_rx_rts_req(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_rts_req *rts_req) { int rc = 0; int current_fn = bts_current_frame_number(bts); const struct gprs_rlcmac_pdch *pdch; pdch = &bts->trx[rts_req->trx_nr].pdch[rts_req->ts_nr]; LOGPDCH(pdch, DL1IF, LOGL_DEBUG, "FN=%u RX RTS.req: sapi=%d " "arfcn=%d cur_fn=%d block=%d\n", rts_req->fn, rts_req->sapi, rts_req->arfcn, current_fn, rts_req->block_nr); switch (rts_req->sapi) { case PCU_IF_SAPI_PDTCH: pcu_rx_rts_req_pdtch(bts, 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(bts, rts_req->trx_nr, rts_req->ts_nr, rts_req->fn, rts_req->block_nr); break; default: LOGP(DL1IF, LOGL_ERROR, "(bts=%u,trx=%u,ts=%u) FN=%u RX RTS.req with " "unsupported sapi %d\n", bts->nr, rts_req->trx_nr, rts_req->ts_nr, rts_req->fn, 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(struct gprs_rlcmac_bts *bts, 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_rcv_ptcch_rach(bts, &rip); } static int pcu_rx_rach_ind(struct gprs_rlcmac_bts *bts, const struct gsm_pcu_if_rach_ind *rach_ind) { int rc = 0; int current_fn = bts_current_frame_number(bts); 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_rcv_rach(bts, &rip); break; case PCU_IF_SAPI_PTCCH: rc = bts_rcv_ptcch_rach(bts, &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_info_ind_ns(struct gprs_rlcmac_bts *bts, const struct gsm_pcu_if_info_ind *info_ind) { struct osmo_sockaddr remote[PCU_IF_NUM_NSVC] = { }; struct osmo_sockaddr local[PCU_IF_NUM_NSVC] = { }; uint16_t nsvci[PCU_IF_NUM_NSVC] = { }; uint16_t valid = 0; for (unsigned int i = 0; i < PCU_IF_NUM_NSVC; i++) { struct osmo_sockaddr_str sockstr; switch (info_ind->address_type[i]) { case PCU_IF_ADDR_TYPE_IPV4: local[i].u.sin.sin_family = AF_INET; local[i].u.sin.sin_addr.s_addr = INADDR_ANY; local[i].u.sin.sin_port = htons(info_ind->local_port[i]); remote[i].u.sin.sin_family = AF_INET; memcpy(&remote[i].u.sin.sin_addr, &info_ind->remote_ip[i].v4, sizeof(struct in_addr)); remote[i].u.sin.sin_port = htons(info_ind->remote_port[i]); break; case PCU_IF_ADDR_TYPE_IPV6: local[i].u.sin6.sin6_family = AF_INET6; local[i].u.sin6.sin6_addr = in6addr_any; local[i].u.sin6.sin6_port = htons(info_ind->local_port[i]); remote[i].u.sin6.sin6_family = AF_INET6; memcpy(&remote[i].u.sin6.sin6_addr, &info_ind->remote_ip[i].v6, sizeof(struct in6_addr)); remote[i].u.sin6.sin6_port = htons(info_ind->remote_port[i]); break; default: continue; } nsvci[i] = info_ind->nsvci[i]; LOGP(DL1IF, LOGL_DEBUG, " NS%u nsvci=%u\n", i, nsvci[i]); if (osmo_sockaddr_str_from_sockaddr(&sockstr, &remote[i].u.sas)) strcpy(sockstr.ip, "invalid"); LOGP(DL1IF, LOGL_DEBUG, " NS%u address: r=%s:%u<->l=NULL:%u\n", i, sockstr.ip, sockstr.port, info_ind->local_port[i]); valid |= 1 << i; } if (valid == 0) { LOGP(DL1IF, LOGL_ERROR, "No NSVC available to connect to the SGSN!\n"); return -EINVAL; } return gprs_ns_update_config(bts, info_ind->nsei, local, remote, nsvci, valid); } static int pcu_rx_info_ind(struct gprs_rlcmac_bts *bts, const struct gsm_pcu_if_info_ind *info_ind) { struct gprs_bssgp_pcu *pcu; int rc = 0; unsigned int trx_nr, ts_nr; unsigned 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++) if (bts->trx[trx_nr].pdch[ts_nr].is_enabled()) bts->trx[trx_nr].pdch[ts_nr].disable(); } gprs_bssgp_destroy(bts); 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->cgi_ps.rai.lac.plmn.mcc = info_ind->mcc; bts->cgi_ps.rai.lac.plmn.mnc = info_ind->mnc; bts->cgi_ps.rai.lac.plmn.mnc_3_digits = info_ind->mnc_3_digits; bts->cgi_ps.rai.lac.lac = info_ind->lac; bts->cgi_ps.rai.rac = info_ind->rac; bts->cgi_ps.cell_identity = info_ind->cell_id; bts->bsic = info_ind->bsic; bts->cs_mask = 1 << 0; /* We need at least 1 CS, let's enable CS1 */ for (i = 0; i < 4; i++) { uint8_t allowed = !!(info_ind->flags & (PCU_IF_FLAG_CS1 << i)); bts->cs_mask |= allowed << i; if (allowed) LOGP(DL1IF, LOGL_DEBUG, " Use CS%d\n", i + 1); } bts_recalc_max_cs(bts); bts->mcs_mask = 0; for (i = 0; i < 9; i++) { uint8_t allowed = !!(info_ind->flags & (PCU_IF_FLAG_MCS1 << i)); bts->mcs_mask |= allowed << i; if (allowed) LOGP(DL1IF, LOGL_DEBUG, " Use MCS%d\n", i + 1); } bts_recalc_max_mcs(bts); LOGP(DL1IF, LOGL_DEBUG, " initial_cs=%u%s\n", info_ind->initial_cs, the_pcu->vty.force_initial_cs ? " (VTY forced, ignoring)" : ""); bts->pcuif_info_ind.initial_cs = info_ind->initial_cs; bts_recalc_initial_cs(bts); LOGP(DL1IF, LOGL_DEBUG, " initial_mcs=%u%s\n", info_ind->initial_mcs, the_pcu->vty.force_initial_mcs ? " (VTY forced, ignoring)" : ""); bts->pcuif_info_ind.initial_mcs = info_ind->initial_mcs; bts_recalc_initial_mcs(bts); pcu = gprs_bssgp_init( bts, info_ind->nsei, 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_ERROR, "Failed to init BSSGP\n"); goto bssgp_failed; } rc = pcu_info_ind_ns(pcu->bts, info_ind); if (rc < 0) { LOGP(DL1IF, LOGL_ERROR, "No NSVC available to connect to the SGSN!\n"); goto bssgp_failed; } 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; } 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, the_pcu->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(bts, pdch, 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(bts, pdch, 0); pdch->disable(); } } } } bts->active = true; return rc; } static int pcu_rx_time_ind(struct gprs_rlcmac_bts *bts, 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); /* Ignore TIME.ind completely, we nowadays relay on DATA.ind always * providing all block FNs. */ return 0; } static int pcu_rx_pag_req(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_pag_req *pag_req) { struct osmo_mobile_identity mi; struct GprsMs *ms = NULL; struct paging_req_cs req = { .chan_needed = pag_req->chan_needed, .tlli = GSM_RESERVED_TMSI }; 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; } switch (mi.type) { case GSM_MI_TYPE_TMSI: req.mi_tmsi = mi; req.mi_tmsi_present = true; /* TODO: look up MS by TMSI? Derive TLLI? */ break; case GSM_MI_TYPE_IMSI: req.mi_imsi = mi; req.mi_imsi_present = true; ms = bts_ms_by_imsi(bts, req.mi_imsi.imsi); break; default: LOGP(DL1IF, LOGL_ERROR, "Unexpected MI type %u\n", mi.type); return -EINVAL; } return bts_add_paging(bts, &req, ms); } static int pcu_rx_susp_req(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_susp_req *susp_req) { struct bssgp_bvc_ctx *bctx = the_pcu->bssgp.bctx; GprsMs *ms; struct gprs_rlcmac_dl_tbf *dl_tbf; struct gprs_rlcmac_ul_tbf *ul_tbf; 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 ((ms = bts_ms_store(bts)->get_ms(susp_req->tlli))) { /* We need to catch both pointers here since MS may become freed after first tbf_free(dl_tbf) if only DL TBF was available */ dl_tbf = ms_dl_tbf(ms); ul_tbf = ms_ul_tbf(ms); if (dl_tbf) tbf_free(dl_tbf); if (ul_tbf) tbf_free(ul_tbf); } if (!bctx) return -1; return bssgp_tx_suspend(bctx->nsei, susp_req->tlli, &ra_id); } static int pcu_rx_app_info_req(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_app_info_req *app_info_req) { struct llist_head *tmp; LOGP(DL1IF, LOGL_DEBUG, "Application Information Request received: type=0x%08x len=%i\n", app_info_req->application_type, app_info_req->len); bts->app_info_pending = 0; llist_for_each(tmp, bts_ms_store(bts)->ms_list()) { GprsMs *ms = llist_entry(tmp, typeof(*ms), list); if (!ms_dl_tbf(ms)) continue; bts->app_info_pending++; ms->app_info_pending = true; } if (!bts->app_info_pending) { LOGP(DL1IF, LOGL_NOTICE, "Packet Application Information will not be sent, no subscribers with active" " TBF\n"); return -1; } if (bts->app_info) { LOGP(DL1IF, LOGL_NOTICE, "Previous Packet Application Information was not sent to all subscribers," " overwriting with new one\n"); msgb_free(bts->app_info); } LOGP(DL1IF, LOGL_INFO, "Sending Packet Application Information to %i subscribers with active TBF\n", bts->app_info_pending); bts->app_info = gprs_rlcmac_app_info_msg(app_info_req); return 0; } static int pcu_rx_neigh_addr_cnf(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_neigh_addr_cnf *naddr_cnf) { struct llist_head *tmp; struct osmo_cell_global_id_ps cgi_ps; struct osmo_cell_global_id_ps *cgi_ps_ptr = &cgi_ps; struct neigh_cache_entry_key neigh_key = { .local_lac = osmo_load16be(&naddr_cnf->orig_req.local_lac), .local_ci = osmo_load16be(&naddr_cnf->orig_req.local_ci), .tgt_arfcn = osmo_load16be(&naddr_cnf->orig_req.tgt_arfcn), .tgt_bsic = naddr_cnf->orig_req.tgt_bsic, }; if (naddr_cnf->err_code == 0) { cgi_ps.rai.lac.plmn.mcc = osmo_load16be(&naddr_cnf->cgi_ps.mcc); cgi_ps.rai.lac.plmn.mnc = osmo_load16be(&naddr_cnf->cgi_ps.mnc); cgi_ps.rai.lac.plmn.mnc_3_digits = naddr_cnf->cgi_ps.mnc_3_digits; cgi_ps.rai.lac.lac = osmo_load16be(&naddr_cnf->cgi_ps.lac); cgi_ps.rai.rac = naddr_cnf->cgi_ps.rac; cgi_ps.cell_identity = osmo_load16be(&naddr_cnf->cgi_ps.cell_identity); LOGP(DL1IF, LOGL_INFO, "Rx Neighbor Address Resolution Confirmation for " NEIGH_CACHE_ENTRY_KEY_FMT ": %s\n", NEIGH_CACHE_ENTRY_KEY_ARGS(&neigh_key), osmo_cgi_ps_name(&cgi_ps)); /* Cache the cgi_ps so we can avoid requesting again same resolution for a while */ neigh_cache_add(bts->pcu->neigh_cache, &neigh_key, &cgi_ps); } else { cgi_ps_ptr = NULL; LOGP(DL1IF, LOGL_INFO, "Rx Neighbor Address Resolution Confirmation for " NEIGH_CACHE_ENTRY_KEY_FMT ": failed with err_code=%u\n", NEIGH_CACHE_ENTRY_KEY_ARGS(&neigh_key), naddr_cnf->err_code); } llist_for_each(tmp, bts_ms_store(bts)->ms_list()) { GprsMs *ms = llist_entry(tmp, typeof(*ms), list); if (ms->nacc && nacc_fsm_is_waiting_addr_resolution(ms->nacc, &neigh_key)) osmo_fsm_inst_dispatch(ms->nacc->fi, NACC_EV_RX_RAC_CI, cgi_ps_ptr); } return 0; } static int pcu_rx_container(struct gprs_rlcmac_bts *bts, struct gsm_pcu_if_container *container) { int rc; uint16_t data_length = osmo_load16be(&container->length); switch (container->msg_type) { case PCU_IF_MSG_NEIGH_ADDR_CNF: if (data_length < sizeof(struct gsm_pcu_if_neigh_addr_cnf)) { LOGP(DL1IF, LOGL_ERROR, "Rx container(NEIGH_ADDR_CNF) message too short: %u vs exp %zu\n", data_length, sizeof(struct gsm_pcu_if_neigh_addr_cnf)); return -EINVAL; } rc = pcu_rx_neigh_addr_cnf(bts, (struct gsm_pcu_if_neigh_addr_cnf*)&container->data); break; default: LOGP(DL1IF, LOGL_NOTICE, "(bts=%d) Rx unexpected msg type (%u) inside container!\n", bts->nr, container->msg_type); rc = -1; } return rc; } #define CHECK_IF_MSG_SIZE(prim_len, prim_msg) \ do { \ size_t _len = PCUIF_HDR_SIZE + sizeof(prim_msg); \ if (prim_len < _len) { \ LOGP(DL1IF, LOGL_ERROR, "Received %zu bytes on PCU Socket, but primitive %s " \ "size is %zu, discarding\n", prim_len, #prim_msg, _len); \ return -EINVAL; \ } \ } while(0); int pcu_rx(struct gsm_pcu_if *pcu_prim, size_t pcu_prim_length) { int rc = 0; size_t exp_len; struct gprs_rlcmac_bts *bts = gprs_pcu_get_bts_by_nr(the_pcu, pcu_prim->bts_nr); if (!bts) { LOGP(DL1IF, LOGL_NOTICE, "Received message for new BTS%d\n", pcu_prim->bts_nr); bts = bts_alloc(the_pcu, pcu_prim->bts_nr); if (!bts) { LOGP(DL1IF, LOGL_ERROR, "Failed to create object for BTS%d!\n", pcu_prim->bts_nr); return -EAGAIN; } } switch (pcu_prim->msg_type) { case PCU_IF_MSG_DATA_IND: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.data_ind); rc = pcu_rx_data_ind(bts, &pcu_prim->u.data_ind); break; case PCU_IF_MSG_DATA_CNF: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.data_cnf); rc = pcu_rx_data_cnf(bts, &pcu_prim->u.data_cnf); break; case PCU_IF_MSG_RTS_REQ: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.rts_req); rc = pcu_rx_rts_req(bts, &pcu_prim->u.rts_req); break; case PCU_IF_MSG_RACH_IND: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.rach_ind); rc = pcu_rx_rach_ind(bts, &pcu_prim->u.rach_ind); break; case PCU_IF_MSG_INFO_IND: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.info_ind); rc = pcu_rx_info_ind(bts, &pcu_prim->u.info_ind); break; case PCU_IF_MSG_TIME_IND: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.time_ind); rc = pcu_rx_time_ind(bts, &pcu_prim->u.time_ind); break; case PCU_IF_MSG_PAG_REQ: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.pag_req); rc = pcu_rx_pag_req(bts, &pcu_prim->u.pag_req); break; case PCU_IF_MSG_SUSP_REQ: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.susp_req); rc = pcu_rx_susp_req(bts, &pcu_prim->u.susp_req); break; case PCU_IF_MSG_APP_INFO_REQ: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.app_info_req); rc = pcu_rx_app_info_req(bts, &pcu_prim->u.app_info_req); break; case PCU_IF_MSG_INTERF_IND: /* TODO: handle interference reports */ break; case PCU_IF_MSG_CONTAINER: CHECK_IF_MSG_SIZE(pcu_prim_length, pcu_prim->u.container); /* ^ check if we can access container fields, v check with container data length */ exp_len = PCUIF_HDR_SIZE + sizeof(pcu_prim->u.container) + osmo_load16be(&pcu_prim->u.container.length); if (pcu_prim_length < exp_len) { LOGP(DL1IF, LOGL_ERROR, "Received %zu bytes on PCU Socket, but primitive container size" \ "is %zu, discarding\n", pcu_prim_length, exp_len); } rc = pcu_rx_container(bts, &pcu_prim->u.container); break; default: LOGP(DL1IF, LOGL_ERROR, "Received unknown PCU msg type %d\n", pcu_prim->msg_type); rc = -EINVAL; } return rc; }