| /* pcu_l1_if.cpp |
| * |
| * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> |
| * |
| * 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 <stdio.h> |
| #include <unistd.h> |
| #include <inttypes.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <sys/socket.h> |
| #include <sys/un.h> |
| #include <arpa/inet.h> |
| #include <ctype.h> |
| |
| extern "C" { |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/gsmtap_util.h> |
| #include <osmocom/core/gsmtap.h> |
| #include <osmocom/core/bitvec.h> |
| #include <osmocom/core/sockaddr_str.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/core/utils.h> |
| #include <osmocom/gprs/gprs_ns2.h> |
| #include <osmocom/gsm/l1sap.h> |
| #include <osmocom/gsm/protocol/gsm_04_08.h> |
| #include <osmocom/gsm/gsm48_rest_octets.h> |
| #include <osmocom/gsm/sysinfo.h> |
| |
| #include <nacc_fsm.h> |
| } |
| |
| #include <gprs_rlcmac.h> |
| #include <pcu_l1_if.h> |
| #include <gprs_debug.h> |
| #include <gprs_bssgp_pcu.h> |
| #include <osmocom/pcu/pcuif_proto.h> |
| #include <bts.h> |
| #include <pdch.h> |
| #include <tbf_ul.h> |
| #include <tbf_dl.h> |
| #include <gprs_ms_storage.h> |
| |
| // 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 (data_len && 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 <<PCU_GSMTAP_C_UL_UNKNOWN))) { |
| gsmtap_send(the_pcu->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] == GSM48_MT_RR_IMM_ASS) |
| 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_trx_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->hopping) { |
| 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; |
| } |