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-rw-r--r--src/pcu_l1_if.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/src/pcu_l1_if.c b/src/pcu_l1_if.c
new file mode 100644
index 0000000..22f18c2
--- /dev/null
+++ b/src/pcu_l1_if.c
@@ -0,0 +1,476 @@
+/* pcu_l1_if.c
+ *
+ * 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.
+ *
+ * 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 <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/msgb.h>
+
+#include <gprs_rlcmac.h>
+#include <pcu_l1_if.h>
+#include <gprs_debug.h>
+#include <gprs_bssgp_pcu.h>
+#include <pcuif_proto.h>
+
+extern void *tall_pcu_ctx;
+
+// Variable for storage current FN.
+int frame_number;
+
+int get_current_fn()
+{
+ return frame_number;
+}
+
+void set_current_fn(int fn)
+{
+ frame_number = fn;
+}
+
+/*
+ * 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;
+}
+
+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;
+
+ LOGP(DL1IF, LOGL_DEBUG, "Sending data request: trx=%d ts=%d sapi=%d "
+ "arfcn=%d fn=%d block=%d data=%s\n", trx, ts, sapi, arfcn, 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(struct msgb *msg, uint8_t trx, uint8_t ts,
+ uint16_t arfcn, uint32_t fn, uint8_t block_nr)
+{
+ 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(struct msgb *msg, uint8_t trx, uint8_t ts,
+ uint16_t arfcn, uint32_t fn, uint8_t block_nr)
+{
+ pcu_tx_data_req(trx, ts, PCU_IF_SAPI_PTCCH, arfcn, fn, block_nr,
+ msg->data, msg->len);
+ msgb_free(msg);
+}
+
+void pcu_l1if_tx_agch(uint8_t *data)
+{
+ pcu_tx_data_req(0, 0, PCU_IF_SAPI_AGCH, 0, 0, 0, data, 23);
+}
+
+void pcu_l1if_tx_pch(uint8_t *data, char *imsi)
+{
+ uint8_t pch_data[3+23];
+
+ /* paging group */
+ if (!imsi || strlen(imsi) < 3)
+ return;
+ imsi += strlen(imsi) - 3;
+ pch_data[0] = imsi[0];
+ pch_data[1] = imsi[1];
+ pch_data[2] = imsi[2];
+
+ memcpy(pch_data + 3, data, 23);
+ pcu_tx_data_req(0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, pch_data, 23+3);
+}
+
+static void pcu_l1if_tx_bcch(uint8_t *data, int len)
+{
+ pcu_tx_data_req(0, 0, PCU_IF_SAPI_BCCH, 0, 0, 0, data, len);
+}
+
+static int pcu_rx_data_ind(struct gsm_pcu_if_data *data_ind)
+{
+ int rc = 0;
+
+ LOGP(DL1IF, LOGL_DEBUG, "Data indication received: sapi=%d arfcn=%d "
+ "block=%d data=%s\n", data_ind->sapi,
+ data_ind->arfcn, data_ind->block_nr,
+ osmo_hexdump(data_ind->data, data_ind->len));
+
+ switch (data_ind->sapi) {
+ case PCU_IF_SAPI_PDTCH:
+ rc = gprs_rlcmac_rcv_block(data_ind->trx_nr, data_ind->ts_nr,
+ data_ind->data, data_ind->len, data_ind->fn);
+ break;
+ default:
+ LOGP(DL1IF, LOGL_ERROR, "Received PCU data indication with "
+ "unsupported sapi %d\n", data_ind->sapi);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+static int pcu_rx_rts_req(struct gsm_pcu_if_rts_req *rts_req)
+{
+ int rc = 0;
+
+ LOGP(DL1IF, LOGL_DEBUG, "RTS request received: trx=%d ts=%d sapi=%d "
+ "arfcn=%d fn=%d block=%d\n", rts_req->trx_nr, rts_req->ts_nr,
+ rts_req->sapi, rts_req->arfcn, rts_req->fn, rts_req->block_nr);
+
+ switch (rts_req->sapi) {
+ case PCU_IF_SAPI_PDTCH:
+ gprs_rlcmac_rcv_rts_block(rts_req->trx_nr, rts_req->ts_nr,
+ rts_req->arfcn, rts_req->fn, rts_req->block_nr);
+ break;
+ case PCU_IF_SAPI_PTCCH:
+ /* FIXME */
+ {
+ struct msgb *msg = msgb_alloc(23, "l1_prim");
+ memset(msgb_put(msg, 23), 0x2b, 23);
+ pcu_l1if_tx_ptcch(msg, rts_req->trx_nr, rts_req->ts_nr,
+ rts_req->arfcn, 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;
+}
+
+static int pcu_rx_rach_ind(struct gsm_pcu_if_rach_ind *rach_ind)
+{
+ int rc = 0;
+
+ LOGP(DL1IF, LOGL_INFO, "RACH request received: sapi=%d "
+ "qta=%d, ra=%d, fn=%d\n", rach_ind->sapi, rach_ind->qta,
+ rach_ind->ra, rach_ind->fn);
+
+ switch (rach_ind->sapi) {
+ case PCU_IF_SAPI_RACH:
+ rc = gprs_rlcmac_rcv_rach(rach_ind->ra, rach_ind->fn,
+ rach_ind->qta);
+ break;
+ default:
+ LOGP(DL1IF, LOGL_ERROR, "Received PCU rach request with "
+ "unsupported sapi %d\n", rach_ind->sapi);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+int flush_pdch(struct gprs_rlcmac_pdch *pdch)
+{
+ uint8_t tfi;
+ struct gprs_rlcmac_tbf *tbf;
+ struct gprs_rlcmac_paging *pag;
+
+ /* kick all TBF on slot */
+ for (tfi = 0; tfi < 32; tfi++) {
+ tbf = pdch->ul_tbf[tfi];
+ if (tbf)
+ tbf_free(tbf);
+ tbf = pdch->dl_tbf[tfi];
+ if (tbf)
+ tbf_free(tbf);
+ }
+ /* flush all pending paging messages */
+ while ((pag = gprs_rlcmac_dequeue_paging(pdch)))
+ talloc_free(pag);
+
+ return 0;
+}
+
+static int pcu_rx_info_ind(struct gsm_pcu_if_info_ind *info_ind)
+{
+ struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts;
+ struct gprs_rlcmac_pdch *pdch;
+ int rc = 0;
+ int trx, ts;
+ int i;
+
+ if (info_ind->version != PCU_IF_VERSION) {
+ fprintf(stderr, "PCU interface version number of BTS (%d) is "
+ "different (%d).\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");
+bssgp_failed:
+ /* free all TBF */
+ for (trx = 0; trx < 8; trx++) {
+ bts->trx[trx].arfcn = info_ind->trx[trx].arfcn;
+ for (ts = 0; ts < 8; ts++) {
+ if (bts->trx[trx].pdch[ts].enable)
+ flush_pdch(&bts->trx[trx].pdch[ts]);
+ }
+ }
+ gprs_bssgp_destroy();
+ return 0;
+ }
+ LOGP(DL1IF, LOGL_INFO, "BTS available\n");
+ LOGP(DL1IF, LOGL_DEBUG, " mcc=%d\n", info_ind->mcc);
+ LOGP(DL1IF, LOGL_DEBUG, " mnc=%d\n", 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, " 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);
+ 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]);
+ LOGP(DL1IF, LOGL_DEBUG, " remote_ip=%d\n", info_ind->remote_ip[0]);
+
+ rc = gprs_bssgp_create(info_ind->remote_ip[0], info_ind->remote_port[0],
+ info_ind->nsei, info_ind->nsvci[0], info_ind->bvci,
+ info_ind->mcc, info_ind->mnc, info_ind->lac, info_ind->rac,
+ info_ind->cell_id);
+ if (rc < 0) {
+ LOGP(DL1IF, LOGL_NOTICE, "SGSN 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 */
+ bts->t3142 = info_ind->t3142;
+ bts->t3169 = info_ind->t3169;
+ bts->t3191 = info_ind->t3191;
+ bts->t3193_msec = info_ind->t3193_10ms * 10;
+ bts->t3195 = info_ind->t3195;
+ 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 = 1;
+ else
+ bts->initial_cs = info_ind->initial_cs;
+ }
+
+ for (trx = 0; trx < 8; trx++) {
+ bts->trx[trx].arfcn = info_ind->trx[trx].arfcn;
+ for (ts = 0; ts < 8; ts++) {
+ pdch = &bts->trx[trx].pdch[ts];
+ if ((info_ind->trx[trx].pdch_mask & (1 << ts))) {
+ /* FIXME: activate dynamically at RLCMAC */
+ if (!pdch->enable) {
+ pcu_tx_act_req(trx, ts, 1);
+ INIT_LLIST_HEAD(&pdch->paging_list);
+ pdch->enable = 1;
+ }
+ pdch->tsc = info_ind->trx[trx].tsc[ts];
+ LOGP(DL1IF, LOGL_INFO, "PDCH: trx=%d ts=%d\n",
+ trx, ts);
+ } else {
+ if (pdch->enable) {
+ pcu_tx_act_req(trx, ts, 0);
+ pdch->enable = 0;
+ flush_pdch(pdch);
+ }
+ }
+ }
+ }
+
+ return rc;
+}
+
+static int pcu_rx_time_ind(struct gsm_pcu_if_time_ind *time_ind)
+{
+ struct gprs_rlcmac_tbf *tbf;
+ uint32_t elapsed;
+ 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);
+
+ set_current_fn(time_ind->fn);
+
+ /* check for poll timeout */
+ llist_for_each_entry(tbf, &gprs_rlcmac_ul_tbfs, list) {
+ if (tbf->poll_state == GPRS_RLCMAC_POLL_SCHED) {
+ elapsed = (frame_number - tbf->poll_fn) % 2715648;
+ if (elapsed >= 20 && elapsed < 200)
+ gprs_rlcmac_poll_timeout(tbf);
+ }
+ }
+ llist_for_each_entry(tbf, &gprs_rlcmac_dl_tbfs, list) {
+ if (tbf->poll_state == GPRS_RLCMAC_POLL_SCHED) {
+ elapsed = (frame_number - tbf->poll_fn) % 2715648;
+ if (elapsed >= 20 && elapsed < 200)
+ gprs_rlcmac_poll_timeout(tbf);
+ }
+ }
+
+ return 0;
+}
+
+static int pcu_rx_pag_req(struct gsm_pcu_if_pag_req *pag_req)
+{
+ LOGP(DL1IF, LOGL_DEBUG, "Paging request received: chan_needed=%d "
+ "length=%d\n", pag_req->chan_needed, pag_req->identity_lv[0]);
+
+ return gprs_rlcmac_add_paging(pag_req->chan_needed,
+ pag_req->identity_lv);
+}
+
+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_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;
+ default:
+ LOGP(DL1IF, LOGL_ERROR, "Received unknwon PCU msg type %d\n",
+ msg_type);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}