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authorPhilipp Maier <pmaier@sysmocom.de>2016-10-26 15:19:41 +0200
committerHarald Welte <laforge@gnumonks.org>2017-05-25 14:04:08 +0200
commitb4999b60d48bcbb5aa575973d068e07ab672e095 (patch)
tree6daf591f6bd52976cf0513a3f73df8bd158d6cc0
parent94bbc73bce304609124e9f617953a11634905d58 (diff)
pcu_sock: add basic pcu interface support
Adds a basic version of a pcu socket interface, similar to the one that can be found in osmo-bts. Change-Id: Ib13cb4099d12fa71e9e0b8727e19ab29e11909b2
-rw-r--r--openbsc/include/openbsc/Makefile.am2
-rw-r--r--openbsc/include/openbsc/debug.h1
-rw-r--r--openbsc/include/openbsc/gsm_data_shared.h3
-rw-r--r--openbsc/include/openbsc/pcu_if.h33
-rw-r--r--openbsc/include/openbsc/pcuif_proto.h158
-rw-r--r--openbsc/src/libbsc/Makefile.am1
-rw-r--r--openbsc/src/libbsc/abis_rsl.c52
-rw-r--r--openbsc/src/libbsc/bsc_init.c22
-rw-r--r--openbsc/src/libbsc/pcu_sock.c653
-rw-r--r--openbsc/src/libcommon/debug.c5
10 files changed, 929 insertions, 1 deletions
diff --git a/openbsc/include/openbsc/Makefile.am b/openbsc/include/openbsc/Makefile.am
index eb09e1878..2740a5d07 100644
--- a/openbsc/include/openbsc/Makefile.am
+++ b/openbsc/include/openbsc/Makefile.am
@@ -65,6 +65,8 @@ noinst_HEADERS = \
bsc_msc_data.h \
osmux.h \
paging.h \
+ pcu_if.h \
+ pcuif_proto.h \
rest_octets.h \
rrlp.h \
rs232.h \
diff --git a/openbsc/include/openbsc/debug.h b/openbsc/include/openbsc/debug.h
index 74db72397..8a4247b69 100644
--- a/openbsc/include/openbsc/debug.h
+++ b/openbsc/include/openbsc/debug.h
@@ -37,6 +37,7 @@ enum {
DRANAP,
DSUA,
DV42BIS,
+ DPCU,
Debug_LastEntry,
};
diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h
index e7c8467f7..3371fb927 100644
--- a/openbsc/include/openbsc/gsm_data_shared.h
+++ b/openbsc/include/openbsc/gsm_data_shared.h
@@ -869,6 +869,9 @@ struct gsm_bts {
struct amr_multirate_conf mr_full;
struct amr_multirate_conf mr_half;
+ /* PCU socket state */
+ struct pcu_sock_state *pcu_state;
+
#endif /* ROLE_BSC */
void *role;
};
diff --git a/openbsc/include/openbsc/pcu_if.h b/openbsc/include/openbsc/pcu_if.h
new file mode 100644
index 000000000..68d417411
--- /dev/null
+++ b/openbsc/include/openbsc/pcu_if.h
@@ -0,0 +1,33 @@
+#ifndef _PCU_IF_H
+#define _PCU_IF_H
+
+#define PCU_SOCK_DEFAULT "/tmp/pcu_bts"
+
+#include <osmocom/gsm/l1sap.h>
+
+extern int pcu_direct;
+
+struct pcu_sock_state {
+ struct gsm_network *net;
+ struct osmo_fd listen_bfd; /* fd for listen socket */
+ struct osmo_fd conn_bfd; /* fd for connection to lcr */
+ struct llist_head upqueue; /* queue for sending messages */
+};
+
+/* PCU relevant information has changed; Inform PCU (if connected) */
+void pcu_info_update(struct gsm_bts *bts);
+
+/* Forward rach indication to PCU */
+int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint16_t ra, uint32_t fn,
+ uint8_t is_11bit, enum ph_burst_type burst_type);
+
+/* Confirm the sending of an immediate assignment to the pcu */
+int pcu_tx_imm_ass_sent(struct gsm_bts *bts, uint32_t tlli);
+
+/* Open connection to PCU */
+int pcu_sock_init(const char *path, struct gsm_bts *bts);
+
+/* Close connection to PCU */
+void pcu_sock_exit(struct gsm_bts *bts);
+
+#endif /* _PCU_IF_H */
diff --git a/openbsc/include/openbsc/pcuif_proto.h b/openbsc/include/openbsc/pcuif_proto.h
new file mode 100644
index 000000000..a52d8964d
--- /dev/null
+++ b/openbsc/include/openbsc/pcuif_proto.h
@@ -0,0 +1,158 @@
+#ifndef _PCUIF_PROTO_H
+#define _PCUIF_PROTO_H
+
+#define PCU_IF_VERSION 0x07
+
+/* msg_type */
+#define PCU_IF_MSG_DATA_REQ 0x00 /* send data to given channel */
+#define PCU_IF_MSG_DATA_CNF 0x01 /* confirm (e.g. transmission on PCH) */
+#define PCU_IF_MSG_DATA_IND 0x02 /* receive data from given channel */
+#define PCU_IF_MSG_RTS_REQ 0x10 /* ready to send request */
+#define PCU_IF_MSG_RACH_IND 0x22 /* receive RACH */
+#define PCU_IF_MSG_INFO_IND 0x32 /* retrieve BTS info */
+#define PCU_IF_MSG_ACT_REQ 0x40 /* activate/deactivate PDCH */
+#define PCU_IF_MSG_TIME_IND 0x52 /* GSM time indication */
+#define PCU_IF_MSG_PAG_REQ 0x60 /* paging request */
+
+/* sapi */
+#define PCU_IF_SAPI_RACH 0x01 /* channel request on CCCH */
+#define PCU_IF_SAPI_AGCH 0x02 /* assignment on AGCH */
+#define PCU_IF_SAPI_PCH 0x03 /* paging/assignment on PCH */
+#define PCU_IF_SAPI_BCCH 0x04 /* SI on BCCH */
+#define PCU_IF_SAPI_PDTCH 0x05 /* packet data/control/ccch block */
+#define PCU_IF_SAPI_PRACH 0x06 /* packet random access channel */
+#define PCU_IF_SAPI_PTCCH 0x07 /* packet TA control channel */
+
+/* flags */
+#define PCU_IF_FLAG_ACTIVE (1 << 0)/* BTS is active */
+#define PCU_IF_FLAG_SYSMO (1 << 1)/* access PDCH of sysmoBTS directly */
+#define PCU_IF_FLAG_CS1 (1 << 16)
+#define PCU_IF_FLAG_CS2 (1 << 17)
+#define PCU_IF_FLAG_CS3 (1 << 18)
+#define PCU_IF_FLAG_CS4 (1 << 19)
+#define PCU_IF_FLAG_MCS1 (1 << 20)
+#define PCU_IF_FLAG_MCS2 (1 << 21)
+#define PCU_IF_FLAG_MCS3 (1 << 22)
+#define PCU_IF_FLAG_MCS4 (1 << 23)
+#define PCU_IF_FLAG_MCS5 (1 << 24)
+#define PCU_IF_FLAG_MCS6 (1 << 25)
+#define PCU_IF_FLAG_MCS7 (1 << 26)
+#define PCU_IF_FLAG_MCS8 (1 << 27)
+#define PCU_IF_FLAG_MCS9 (1 << 28)
+
+struct gsm_pcu_if_data {
+ uint8_t sapi;
+ uint8_t len;
+ uint8_t data[162];
+ uint32_t fn;
+ uint16_t arfcn;
+ uint8_t trx_nr;
+ uint8_t ts_nr;
+ uint8_t block_nr;
+ int8_t rssi;
+ uint16_t ber10k; /*!< \brief BER in units of 0.01% */
+ int16_t ta_offs_qbits; /* !< \brief Burst TA Offset in quarter bits */
+ int16_t lqual_cb; /* !< \brief Link quality in centiBel */
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_rts_req {
+ uint8_t sapi;
+ uint8_t spare[3];
+ uint32_t fn;
+ uint16_t arfcn;
+ uint8_t trx_nr;
+ uint8_t ts_nr;
+ uint8_t block_nr;
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_rach_ind {
+ uint8_t sapi;
+ uint16_t ra;
+ int16_t qta;
+ uint32_t fn;
+ uint16_t arfcn;
+ uint8_t is_11bit;
+ uint8_t burst_type;
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_info_trx {
+ uint16_t arfcn;
+ uint8_t pdch_mask; /* PDCH channels per TS */
+ uint8_t spare;
+ uint8_t tsc[8]; /* TSC per channel */
+ uint32_t hlayer1;
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_info_ind {
+ uint32_t version;
+ uint32_t flags;
+ struct gsm_pcu_if_info_trx trx[8]; /* TRX infos per BTS */
+ uint8_t bsic;
+ /* RAI */
+ uint16_t mcc, mnc, lac, rac;
+ /* NSE */
+ uint16_t nsei;
+ uint8_t nse_timer[7];
+ uint8_t cell_timer[11];
+ /* cell */
+ uint16_t cell_id;
+ uint16_t repeat_time;
+ uint8_t repeat_count;
+ uint16_t bvci;
+ uint8_t t3142;
+ uint8_t t3169;
+ uint8_t t3191;
+ uint8_t t3193_10ms;
+ uint8_t t3195;
+ uint8_t n3101;
+ uint8_t n3103;
+ uint8_t n3105;
+ uint8_t cv_countdown;
+ uint16_t dl_tbf_ext;
+ uint16_t ul_tbf_ext;
+ uint8_t initial_cs;
+ uint8_t initial_mcs;
+ /* NSVC */
+ uint16_t nsvci[2];
+ uint16_t local_port[2];
+ uint16_t remote_port[2];
+ uint32_t remote_ip[2];
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_act_req {
+ uint8_t activate;
+ uint8_t trx_nr;
+ uint8_t ts_nr;
+ uint8_t spare;
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_time_ind {
+ uint32_t fn;
+} __attribute__ ((packed));
+
+struct gsm_pcu_if_pag_req {
+ uint8_t sapi;
+ uint8_t chan_needed;
+ uint8_t identity_lv[9];
+} __attribute__ ((packed));
+
+struct gsm_pcu_if {
+ /* context based information */
+ uint8_t msg_type; /* message type */
+ uint8_t bts_nr; /* bts number */
+ uint8_t spare[2];
+
+ union {
+ struct gsm_pcu_if_data data_req;
+ struct gsm_pcu_if_data data_cnf;
+ struct gsm_pcu_if_data data_ind;
+ struct gsm_pcu_if_rts_req rts_req;
+ struct gsm_pcu_if_rach_ind rach_ind;
+ struct gsm_pcu_if_info_ind info_ind;
+ struct gsm_pcu_if_act_req act_req;
+ struct gsm_pcu_if_time_ind time_ind;
+ struct gsm_pcu_if_pag_req pag_req;
+ } u;
+} __attribute__ ((packed));
+
+#endif /* _PCUIF_PROTO_H */
diff --git a/openbsc/src/libbsc/Makefile.am b/openbsc/src/libbsc/Makefile.am
index fd8f37a79..e78bde624 100644
--- a/openbsc/src/libbsc/Makefile.am
+++ b/openbsc/src/libbsc/Makefile.am
@@ -36,6 +36,7 @@ libbsc_a_SOURCES = \
handover_decision.c \
handover_logic.c \
meas_rep.c \
+ pcu_sock.c \
rest_octets.c \
system_information.c \
e1_config.c \
diff --git a/openbsc/src/libbsc/abis_rsl.c b/openbsc/src/libbsc/abis_rsl.c
index 20dd2b5ca..62c12a844 100644
--- a/openbsc/src/libbsc/abis_rsl.c
+++ b/openbsc/src/libbsc/abis_rsl.c
@@ -45,6 +45,7 @@
#include <osmocom/abis/e1_input.h>
#include <osmocom/gsm/rsl.h>
#include <osmocom/core/talloc.h>
+#include <openbsc/pcu_if.h>
#define RSL_ALLOC_SIZE 1024
#define RSL_ALLOC_HEADROOM 128
@@ -1285,6 +1286,12 @@ static int rsl_rx_chan_act_ack(struct msgb *msg)
send_lchan_signal(S_LCHAN_ACTIVATE_ACK, lchan, NULL);
+ /* Update bts attributes inside the PCU */
+ if (ts->pchan == GSM_PCHAN_TCH_F_TCH_H_PDCH ||
+ ts->pchan == GSM_PCHAN_TCH_F_PDCH ||
+ ts->pchan == GSM_PCHAN_PDCH)
+ pcu_info_update(ts->trx->bts);
+
return 0;
}
@@ -1768,6 +1775,39 @@ static int rsl_send_imm_ass_rej(struct gsm_bts *bts,
return rsl_imm_assign_cmd(bts, sizeof(*iar), (uint8_t *) iar);
}
+/* Handle packet channel rach requests */
+static int rsl_rx_pchan_rqd(struct msgb *msg, struct gsm_bts *bts)
+{
+ struct gsm48_req_ref *rqd_ref;
+ struct abis_rsl_dchan_hdr *rqd_hdr = msgb_l2(msg);
+ rqd_ref = (struct gsm48_req_ref *) &rqd_hdr->data[1];
+ uint8_t ra = rqd_ref->ra;
+ uint8_t t1, t2, t3;
+ uint32_t fn;
+ uint8_t rqd_ta;
+ uint8_t is_11bit;
+
+ /* Process rach request and forward contained information to PCU */
+ if (ra == 0x7F) {
+ is_11bit = 1;
+
+ /* FIXME: Also handle 11 bit rach requests */
+ LOGP(DRSL, LOGL_ERROR, "BTS %d eleven bit access burst not supported yet!\n",bts->nr);
+ return -EINVAL;
+ } else {
+ is_11bit = 0;
+ t1 = rqd_ref->t1;
+ t2 = rqd_ref->t2;
+ t3 = rqd_ref->t3_low | (rqd_ref->t3_high << 3);
+ fn = (51 * ((t3-t2) % 26) + t3 + 51 * 26 * t1);
+
+ rqd_ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2];
+ }
+
+ return pcu_tx_rach_ind(bts, rqd_ta, ra, fn, is_11bit,
+ GSM_L1_BURST_TYPE_ACCESS_0);
+}
+
/* MS has requested a channel on the RACH */
static int rsl_rx_chan_rqd(struct msgb *msg)
{
@@ -1795,10 +1835,20 @@ static int rsl_rx_chan_rqd(struct msgb *msg)
return -EINVAL;
rqd_ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2];
+ /* Determine channel request cause code */
+ chreq_reason = get_reason_by_chreq(rqd_ref->ra, bts->network->neci);
+ LOGP(DRSL, LOGL_NOTICE, "BTS %d CHAN RQD: reason: %s (ra=0x%02x, neci=0x%02x, chreq_reason=0x%02x)\n",
+ msg->lchan->ts->trx->bts->nr,
+ get_value_string(gsm_chreq_descs, chreq_reason),
+ rqd_ref->ra, bts->network->neci, chreq_reason);
+
+ /* Handle PDCH related rach requests (in case of BSC-co-located-PCU */
+ if (chreq_reason == GSM_CHREQ_REASON_PDCH)
+ return rsl_rx_pchan_rqd(msg, bts);
+
/* determine channel type (SDCCH/TCH_F/TCH_H) based on
* request reference RA */
lctype = get_ctype_by_chreq(bts->network, rqd_ref->ra);
- chreq_reason = get_reason_by_chreq(rqd_ref->ra, bts->network->neci);
rate_ctr_inc(&bts->network->bsc_ctrs->ctr[BSC_CTR_CHREQ_TOTAL]);
diff --git a/openbsc/src/libbsc/bsc_init.c b/openbsc/src/libbsc/bsc_init.c
index 2af846e72..50c73db03 100644
--- a/openbsc/src/libbsc/bsc_init.c
+++ b/openbsc/src/libbsc/bsc_init.c
@@ -37,6 +37,8 @@
#include <osmocom/gsm/sysinfo.h>
#include <openbsc/e1_config.h>
#include <openbsc/common_bsc.h>
+#include <openbsc/pcu_if.h>
+#include <limits.h>
/* global pointer to the gsm network data structure */
extern struct gsm_network *bsc_gsmnet;
@@ -191,6 +193,10 @@ int gsm_bts_trx_set_system_infos(struct gsm_bts_trx *trx)
return rc;
}
+ /* Make sure the PCU is aware (in case anything GPRS related has
+ * changed in SI */
+ pcu_info_update(bts);
+
return 0;
err_out:
LOGP(DRR, LOGL_ERROR, "Cannot generate SI%s for BTS %u: error <%s>, "
@@ -486,6 +492,7 @@ static int bootstrap_bts(struct gsm_bts *bts)
int bsc_network_alloc(mncc_recv_cb_t mncc_recv)
{
+ /* initialize our data structures */
bsc_gsmnet = bsc_network_init(tall_bsc_ctx, 1, 1, mncc_recv);
if (!bsc_gsmnet)
return -ENOMEM;
@@ -500,6 +507,8 @@ int bsc_network_configure(const char *config_file)
{
struct gsm_bts *bts;
int rc;
+ char pcu_sock_path[PATH_MAX];
+ char pcu_sock_path_ending[PATH_MAX];
rc = vty_read_config_file(config_file, NULL);
if (rc < 0) {
@@ -527,6 +536,19 @@ int bsc_network_configure(const char *config_file)
LOGP(DNM, LOGL_FATAL, "Error enabling E1 input driver\n");
return rc;
}
+
+ strcpy(pcu_sock_path, PCU_SOCK_DEFAULT);
+ sprintf(pcu_sock_path_ending,"_%i", bts->nr);
+ if (bts->nr > 0)
+ strcat(pcu_sock_path, pcu_sock_path_ending);
+ rc = pcu_sock_init(pcu_sock_path, bts);
+
+ if (rc < 0) {
+ LOGP(DNM, LOGL_FATAL,
+ "PCU L1 socket failed for bts %i\n", bts->nr);
+ return rc;
+ }
}
+
return 0;
}
diff --git a/openbsc/src/libbsc/pcu_sock.c b/openbsc/src/libbsc/pcu_sock.c
new file mode 100644
index 000000000..b2bc425e9
--- /dev/null
+++ b/openbsc/src/libbsc/pcu_sock.c
@@ -0,0 +1,653 @@
+/* pcu_sock.c: Connect from PCU via unix domain socket */
+
+/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009-2012 by Andreas Eversberg <jolly@eversberg.eu>
+ * (C) 2012 by Holger Hans Peter Freyther
+ * All Rights Reserved
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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/socket.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/gsm/l1sap.h>
+#include <osmocom/gsm/gsm0502.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/pcu_if.h>
+#include <openbsc/pcuif_proto.h>
+#include <openbsc/signal.h>
+#include <openbsc/debug.h>
+#include <openbsc/abis_rsl.h>
+
+static int pcu_sock_send(struct gsm_bts *bts, struct msgb *msg);
+uint32_t trx_get_hlayer1(struct gsm_bts_trx *trx);
+int pcu_direct = 0;
+
+static const char *sapi_string[] = {
+ [PCU_IF_SAPI_RACH] = "RACH",
+ [PCU_IF_SAPI_AGCH] = "AGCH",
+ [PCU_IF_SAPI_PCH] = "PCH",
+ [PCU_IF_SAPI_BCCH] = "BCCH",
+ [PCU_IF_SAPI_PDTCH] = "PDTCH",
+ [PCU_IF_SAPI_PRACH] = "PRACH",
+ [PCU_IF_SAPI_PTCCH] = "PTCCH",
+};
+
+static struct gsm_bts_trx *trx_by_nr(struct gsm_bts *bts, uint8_t trx_nr)
+{
+ struct gsm_bts_trx *trx;
+
+ llist_for_each_entry(trx, &bts->trx_list, list) {
+ if (trx->nr == trx_nr)
+ return trx;
+ }
+
+ return NULL;
+}
+
+/* Check if BTS has a PCU connection */
+static bool pcu_connected(struct gsm_bts *bts)
+{
+ struct pcu_sock_state *state = bts->pcu_state;
+
+ if (!state)
+ return false;
+ if (state->conn_bfd.fd <= 0)
+ return false;
+ return true;
+}
+
+/*
+ * PCU messages
+ */
+
+/* Set up an message buffer to package an pcu interface message */
+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;
+}
+
+/* Helper function exclusivly used by pcu_if_signal_cb() */
+static bool ts_should_be_pdch(struct gsm_bts_trx_ts *ts) {
+ if (ts->pchan == GSM_PCHAN_PDCH)
+ return true;
+ if (ts->pchan == GSM_PCHAN_TCH_F_PDCH) {
+ /* When we're busy deactivating the PDCH, we first set
+ * DEACT_PENDING, tell the PCU about it and wait for a
+ * response. So DEACT_PENDING means "no PDCH" to the PCU.
+ * Similarly, when we're activating PDCH, we set the
+ * ACT_PENDING and wait for an activation response from the
+ * PCU, so ACT_PENDING means "is PDCH". */
+ if (ts->flags & TS_F_PDCH_ACTIVE)
+ return !(ts->flags & TS_F_PDCH_DEACT_PENDING);
+ else
+ return (ts->flags & TS_F_PDCH_ACT_PENDING);
+ }
+ if (ts->pchan == GSM_PCHAN_TCH_F_TCH_H_PDCH) {
+ /*
+ * When we're busy de-/activating the PDCH, we first set
+ * ts->dyn.pchan_want, tell the PCU about it and wait for a
+ * response. So only care about dyn.pchan_want here.
+ */
+ return ts->dyn.pchan_want == GSM_PCHAN_PDCH;
+ }
+ return false;
+}
+
+/* Send BTS properties to the PCU */
+static int pcu_tx_info_ind(struct gsm_bts *bts)
+{
+ struct msgb *msg;
+ struct gsm_pcu_if *pcu_prim;
+ struct gsm_pcu_if_info_ind *info_ind;
+ struct gprs_rlc_cfg *rlcc;
+ struct gsm_bts_gprs_nsvc *nsvc;
+ struct gsm_bts_trx *trx;
+ struct gsm_bts_trx_ts *ts;
+ int i, j;
+
+ OSMO_ASSERT(bts);
+ OSMO_ASSERT(bts->network);
+
+ LOGP(DPCU, LOGL_INFO, "Sending info for BTS %d\n",bts->nr);
+
+ rlcc = &bts->gprs.cell.rlc_cfg;
+
+ msg = pcu_msgb_alloc(PCU_IF_MSG_INFO_IND, bts->nr);
+ if (!msg)
+ return -ENOMEM;
+
+ pcu_prim = (struct gsm_pcu_if *) msg->data;
+ info_ind = &pcu_prim->u.info_ind;
+ info_ind->version = PCU_IF_VERSION;
+ info_ind->flags |= PCU_IF_FLAG_ACTIVE;
+
+ if (pcu_direct)
+ info_ind->flags |= PCU_IF_FLAG_SYSMO;
+
+ /* RAI */
+ info_ind->mcc = bts->network->country_code;
+ info_ind->mnc = bts->network->network_code;
+ info_ind->lac = bts->location_area_code;
+ info_ind->rac = bts->gprs.rac;
+
+ /* NSE */
+ info_ind->nsei = bts->gprs.nse.nsei;
+ memcpy(info_ind->nse_timer, bts->gprs.nse.timer, 7);
+ memcpy(info_ind->cell_timer, bts->gprs.cell.timer, 11);
+
+ /* cell attributes */
+ info_ind->cell_id = bts->cell_identity;
+ info_ind->repeat_time = rlcc->paging.repeat_time;
+ info_ind->repeat_count = rlcc->paging.repeat_count;
+ info_ind->bvci = bts->gprs.cell.bvci;
+ info_ind->t3142 = rlcc->parameter[RLC_T3142];
+ info_ind->t3169 = rlcc->parameter[RLC_T3169];
+ info_ind->t3191 = rlcc->parameter[RLC_T3191];
+ info_ind->t3193_10ms = rlcc->parameter[RLC_T3193];
+ info_ind->t3195 = rlcc->parameter[RLC_T3195];
+ info_ind->n3101 = rlcc->parameter[RLC_N3101];
+ info_ind->n3103 = rlcc->parameter[RLC_N3103];
+ info_ind->n3105 = rlcc->parameter[RLC_N3105];
+ info_ind->cv_countdown = rlcc->parameter[CV_COUNTDOWN];
+ if (rlcc->cs_mask & (1 << GPRS_CS1))
+ info_ind->flags |= PCU_IF_FLAG_CS1;
+ if (rlcc->cs_mask & (1 << GPRS_CS2))
+ info_ind->flags |= PCU_IF_FLAG_CS2;
+ if (rlcc->cs_mask & (1 << GPRS_CS3))
+ info_ind->flags |= PCU_IF_FLAG_CS3;
+ if (rlcc->cs_mask & (1 << GPRS_CS4))
+ info_ind->flags |= PCU_IF_FLAG_CS4;
+ if (bts->gprs.mode == BTS_GPRS_EGPRS) {
+ if (rlcc->cs_mask & (1 << GPRS_MCS1))
+ info_ind->flags |= PCU_IF_FLAG_MCS1;
+ if (rlcc->cs_mask & (1 << GPRS_MCS2))
+ info_ind->flags |= PCU_IF_FLAG_MCS2;
+ if (rlcc->cs_mask & (1 << GPRS_MCS3))
+ info_ind->flags |= PCU_IF_FLAG_MCS3;
+ if (rlcc->cs_mask & (1 << GPRS_MCS4))
+ info_ind->flags |= PCU_IF_FLAG_MCS4;
+ if (rlcc->cs_mask & (1 << GPRS_MCS5))
+ info_ind->flags |= PCU_IF_FLAG_MCS5;
+ if (rlcc->cs_mask & (1 << GPRS_MCS6))
+ info_ind->flags |= PCU_IF_FLAG_MCS6;
+ if (rlcc->cs_mask & (1 << GPRS_MCS7))
+ info_ind->flags |= PCU_IF_FLAG_MCS7;
+ if (rlcc->cs_mask & (1 << GPRS_MCS8))
+ info_ind->flags |= PCU_IF_FLAG_MCS8;
+ if (rlcc->cs_mask & (1 << GPRS_MCS9))
+ info_ind->flags |= PCU_IF_FLAG_MCS9;
+ }
+#warning "isn't dl_tbf_ext wrong?: * 10 and no ntohs"
+ info_ind->dl_tbf_ext = rlcc->parameter[T_DL_TBF_EXT];
+#warning "isn't ul_tbf_ext wrong?: * 10 and no ntohs"
+ info_ind->ul_tbf_ext = rlcc->parameter[T_UL_TBF_EXT];
+ info_ind->initial_cs = rlcc->initial_cs;
+ info_ind->initial_mcs = rlcc->initial_mcs;
+
+ /* NSVC */
+ for (i = 0; i < 2; i++) {
+ nsvc = &bts->gprs.nsvc[i];
+ info_ind->nsvci[i] = nsvc->nsvci;
+ info_ind->local_port[i] = nsvc->local_port;
+ info_ind->remote_port[i] = nsvc->remote_port;
+ info_ind->remote_ip[i] = nsvc->remote_ip;
+ }
+
+ for (i = 0; i < 8; i++) {
+ trx = trx_by_nr(bts, i);
+ if (!trx)
+ break;
+ info_ind->trx[i].pdch_mask = 0;
+ info_ind->trx[i].arfcn = trx->arfcn;
+ for (j = 0; j < 8; j++) {
+ ts = &trx->ts[j];
+ if (ts->mo.nm_state.operational == NM_OPSTATE_ENABLED
+ && ts_should_be_pdch(ts)) {
+ info_ind->trx[i].pdch_mask |= (1 << j);
+ info_ind->trx[i].tsc[j] =
+ (ts->tsc >= 0) ? ts->tsc : bts->bsic & 7;
+ LOGP(DPCU, LOGL_INFO, "trx=%d ts=%d: "
+ "available (tsc=%d arfcn=%d)\n",
+ trx->nr, ts->nr,
+ info_ind->trx[i].tsc[j],
+ info_ind->trx[i].arfcn);
+ }
+ }
+ }
+
+ return pcu_sock_send(bts, msg);
+}
+
+void pcu_info_update(struct gsm_bts *bts)
+{
+ if (pcu_connected(bts))
+ pcu_tx_info_ind(bts);
+}
+
+/* Forward rach indication to PCU */
+int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint16_t ra, uint32_t fn,
+ uint8_t is_11bit, enum ph_burst_type burst_type)
+{
+ struct msgb *msg;
+ struct gsm_pcu_if *pcu_prim;
+ struct gsm_pcu_if_rach_ind *rach_ind;
+
+ /* Bail if no PCU is connected */
+ if (!pcu_connected(bts)) {
+ LOGP(DRSL, LOGL_ERROR, "BTS %d CHAN RQD(GPRS) but PCU not "
+ "connected!\n", bts->nr);
+ return -ENODEV;
+ }
+
+ LOGP(DPCU, LOGL_INFO, "Sending RACH indication: qta=%d, ra=%d, "
+ "fn=%d\n", qta, ra, fn);
+
+ msg = pcu_msgb_alloc(PCU_IF_MSG_RACH_IND, bts->nr);
+ if (!msg)
+ return -ENOMEM;
+ pcu_prim = (struct gsm_pcu_if *) msg->data;
+ rach_ind = &pcu_prim->u.rach_ind;
+
+ rach_ind->sapi = PCU_IF_SAPI_RACH;
+ rach_ind->ra = ra;
+ rach_ind->qta = qta;
+ rach_ind->fn = fn;
+ rach_ind->is_11bit = is_11bit;
+ rach_ind->burst_type = burst_type;
+
+ return pcu_sock_send(bts, msg);
+}
+
+static int pcu_rx_data_req(struct gsm_bts *bts, uint8_t msg_type,
+ struct gsm_pcu_if_data *data_req)
+{
+ uint8_t is_ptcch;
+ struct gsm_bts_trx *trx;
+ struct gsm_bts_trx_ts *ts;
+ struct msgb *msg;
+ int rc = 0;
+
+ LOGP(DPCU, LOGL_DEBUG, "Data request received: sapi=%s arfcn=%d "
+ "block=%d data=%s\n", sapi_string[data_req->sapi],
+ data_req->arfcn, data_req->block_nr,
+ osmo_hexdump(data_req->data, data_req->len));
+
+ switch (data_req->sapi) {
+ case PCU_IF_SAPI_PCH:
+ if (msg_type == PCU_IF_MSG_PAG_REQ) {
+ /* FIXME: Add function to schedule paging request.
+ * This might not be required, if PCU_IF_MSG_DATA_REQ
+ * is used instead. */
+ } else {
+ struct gsm_bts_role_bts *btsb = bts->role;
+
+ printf("paging_add_imm_ass(btsb->paging_state, data_req->data,data_req->len);\n");
+ }
+ break;
+ case PCU_IF_SAPI_AGCH:
+ msg = msgb_alloc(data_req->len, "pcu_agch");
+ if (!msg) {
+ rc = -ENOMEM;
+ break;
+ }
+ msg->l3h = msgb_put(msg, data_req->len);
+ memcpy(msg->l3h, data_req->data, data_req->len);
+
+ if (rsl_imm_assign_cmd(bts, msg->len, msg->data)) {
+ msgb_free(msg);
+ rc = -EIO;
+ }
+ break;
+ default:
+ LOGP(DPCU, LOGL_ERROR, "Received PCU data request with "
+ "unsupported sapi %d\n", data_req->sapi);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+static int pcu_rx(struct gsm_network *net, uint8_t msg_type,
+ struct gsm_pcu_if *pcu_prim)
+{
+ int rc = 0;
+ struct gsm_bts *bts;
+
+ /* FIXME: allow multiple BTS */
+ bts = llist_entry(net->bts_list.next, struct gsm_bts, list);
+
+ switch (msg_type) {
+ case PCU_IF_MSG_DATA_REQ:
+ case PCU_IF_MSG_PAG_REQ:
+ rc = pcu_rx_data_req(bts, msg_type, &pcu_prim->u.data_req);
+ break;
+ default:
+ LOGP(DPCU, LOGL_ERROR, "Received unknwon PCU msg type %d\n",
+ msg_type);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+/*
+ * PCU socket interface
+ */
+
+static int pcu_sock_send(struct gsm_bts *bts, struct msgb *msg)
+{
+ struct pcu_sock_state *state = bts->pcu_state;
+ struct osmo_fd *conn_bfd;
+ struct gsm_pcu_if *pcu_prim = (struct gsm_pcu_if *) msg->data;
+
+ if (!state) {
+ if (pcu_prim->msg_type != PCU_IF_MSG_TIME_IND)
+ LOGP(DPCU, LOGL_INFO, "PCU socket not created, "
+ "dropping message\n");
+ msgb_free(msg);
+ return -EINVAL;
+ }
+ conn_bfd = &state->conn_bfd;
+ if (conn_bfd->fd <= 0) {
+ if (pcu_prim->msg_type != PCU_IF_MSG_TIME_IND)
+ LOGP(DPCU, LOGL_NOTICE, "PCU socket not connected, "
+ "dropping message\n");
+ msgb_free(msg);
+ return -EIO;
+ }
+ msgb_enqueue(&state->upqueue, msg);
+ conn_bfd->when |= BSC_FD_WRITE;
+
+ return 0;
+}
+
+static void pcu_sock_close(struct pcu_sock_state *state)
+{
+ struct osmo_fd *bfd = &state->conn_bfd;
+ struct gsm_bts *bts;
+ struct gsm_bts_trx *trx;
+ struct gsm_bts_trx_ts *ts;
+ int i, j;
+
+ /* FIXME: allow multiple BTS */
+ bts = llist_entry(state->net->bts_list.next, struct gsm_bts, list);
+
+ LOGP(DPCU, LOGL_NOTICE, "PCU socket has LOST connection\n");
+
+ close(bfd->fd);
+ bfd->fd = -1;
+ osmo_fd_unregister(bfd);
+
+ /* re-enable the generation of ACCEPT for new connections */
+ state->listen_bfd.when |= BSC_FD_READ;
+
+#if 0
+ /* remove si13, ... */
+ bts->si_valid &= ~(1 << SYSINFO_TYPE_13);
+ osmo_signal_dispatch(SS_GLOBAL, S_NEW_SYSINFO, bts);
+#endif
+
+ /* release PDCH */
+ for (i = 0; i < 8; i++) {
+ trx = trx_by_nr(bts, i);
+ if (!trx)
+ break;
+ for (j = 0; j < 8; j++) {
+ ts = &trx->ts[j];
+ if (ts->mo.nm_state.operational == NM_OPSTATE_ENABLED
+ && ts->pchan == GSM_PCHAN_PDCH) {
+ printf("l1sap_chan_rel(trx,gsm_lchan2chan_nr(ts->lchan));\n");
+ }
+ }
+ }
+
+ /* flush the queue */
+ while (!llist_empty(&state->upqueue)) {
+ struct msgb *msg = msgb_dequeue(&state->upqueue);
+ msgb_free(msg);
+ }
+}
+
+static int pcu_sock_read(struct osmo_fd *bfd)
+{
+ struct pcu_sock_state *state = (struct pcu_sock_state *)bfd->data;
+ struct gsm_pcu_if *pcu_prim;
+ struct msgb *msg;
+ int rc;
+
+ msg = msgb_alloc(sizeof(*pcu_prim), "pcu_sock_rx");
+ if (!msg)
+ return -ENOMEM;
+
+ pcu_prim = (struct gsm_pcu_if *) msg->tail;
+
+ rc = recv(bfd->fd, msg->tail, msgb_tailroom(msg), 0);
+ if (rc == 0)
+ goto close;
+
+ if (rc < 0) {
+ if (errno == EAGAIN)
+ return 0;
+ goto close;
+ }
+
+ rc = pcu_rx(state->net, pcu_prim->msg_type, pcu_prim);
+
+ /* as we always synchronously process the message in pcu_rx() and
+ * its callbacks, we can free the message here. */
+ msgb_free(msg);
+
+ return rc;
+
+close:
+ msgb_free(msg);
+ pcu_sock_close(state);
+ return -1;
+}
+
+static int pcu_sock_write(struct osmo_fd *bfd)
+{
+ struct pcu_sock_state *state = bfd->data;
+ int rc;
+
+ while (!llist_empty(&state->upqueue)) {
+ struct msgb *msg, *msg2;
+ struct gsm_pcu_if *pcu_prim;
+
+ /* peek at the beginning of the queue */
+ msg = llist_entry(state->upqueue.next, struct msgb, list);
+ pcu_prim = (struct gsm_pcu_if *)msg->data;
+
+ bfd->when &= ~BSC_FD_WRITE;
+
+ /* bug hunter 8-): maybe someone forgot msgb_put(...) ? */
+ if (!msgb_length(msg)) {
+ LOGP(DPCU, LOGL_ERROR, "message type (%d) with ZERO "
+ "bytes!\n", pcu_prim->msg_type);
+ goto dontsend;
+ }
+
+ /* try to send it over the socket */
+ rc = write(bfd->fd, msgb_data(msg), msgb_length(msg));
+ if (rc == 0)
+ goto close;
+ if (rc < 0) {
+ if (errno == EAGAIN) {
+ bfd->when |= BSC_FD_WRITE;
+ break;
+ }
+ goto close;
+ }
+
+dontsend:
+ /* _after_ we send it, we can deueue */
+ msg2 = msgb_dequeue(&state->upqueue);
+ assert(msg == msg2);
+ msgb_free(msg);
+ }
+ return 0;
+
+close:
+ pcu_sock_close(state);
+
+ return -1;
+}
+
+static int pcu_sock_cb(struct osmo_fd *bfd, unsigned int flags)
+{
+ int rc = 0;
+
+ if (flags & BSC_FD_READ)
+ rc = pcu_sock_read(bfd);
+ if (rc < 0)
+ return rc;
+
+ if (flags & BSC_FD_WRITE)
+ rc = pcu_sock_write(bfd);
+
+ return rc;
+}
+
+/* accept connection comming from PCU */
+static int pcu_sock_accept(struct osmo_fd *bfd, unsigned int flags)
+{
+ struct pcu_sock_state *state = (struct pcu_sock_state *)bfd->data;
+ struct osmo_fd *conn_bfd = &state->conn_bfd;
+ struct sockaddr_un un_addr;
+ socklen_t len;
+ int rc;
+
+ len = sizeof(un_addr);
+ rc = accept(bfd->fd, (struct sockaddr *) &un_addr, &len);
+ if (rc < 0) {
+ LOGP(DPCU, LOGL_ERROR, "Failed to accept a new connection\n");
+ return -1;
+ }
+
+ if (conn_bfd->fd >= 0) {
+ LOGP(DPCU, LOGL_NOTICE, "PCU connects but we already have "
+ "another active connection ?!?\n");
+ /* We already have one PCU connected, this is all we support */
+ state->listen_bfd.when &= ~BSC_FD_READ;
+ close(rc);
+ return 0;
+ }
+
+ conn_bfd->fd = rc;
+ conn_bfd->when = BSC_FD_READ;
+ conn_bfd->cb = pcu_sock_cb;
+ conn_bfd->data = state;
+
+ if (osmo_fd_register(conn_bfd) != 0) {
+ LOGP(DPCU, LOGL_ERROR, "Failed to register new connection "
+ "fd\n");
+ close(conn_bfd->fd);
+ conn_bfd->fd = -1;
+ return -1;
+ }
+
+ LOGP(DPCU, LOGL_NOTICE, "PCU socket connected to external PCU\n");
+
+ return 0;
+}
+
+/* Open connection to PCU */
+int pcu_sock_init(const char *path, struct gsm_bts *bts)
+{
+ struct pcu_sock_state *state;
+ struct osmo_fd *bfd;
+ int rc;
+
+ state = talloc_zero(NULL, struct pcu_sock_state);
+ if (!state)
+ return -ENOMEM;
+
+ INIT_LLIST_HEAD(&state->upqueue);
+ state->net = bts->network;
+ state->conn_bfd.fd = -1;
+
+ bfd = &state->listen_bfd;
+
+ bfd->fd = osmo_sock_unix_init(SOCK_SEQPACKET, 0, path,
+ OSMO_SOCK_F_BIND);
+ if (bfd->fd < 0) {
+ LOGP(DPCU, LOGL_ERROR, "Could not create unix socket: %s\n",
+ strerror(errno));
+ talloc_free(state);
+ return -1;
+ }
+
+ bfd->when = BSC_FD_READ;
+ bfd->cb = pcu_sock_accept;
+ bfd->data = state;
+
+ rc = osmo_fd_register(bfd);
+ if (rc < 0) {
+ LOGP(DPCU, LOGL_ERROR, "Could not register listen fd: %d\n",
+ rc);
+ close(bfd->fd);
+ talloc_free(state);
+ return rc;
+ }
+
+ bts->pcu_state = state;
+ return 0;
+}
+
+/* Close connection to PCU */
+void pcu_sock_exit(struct gsm_bts *bts)
+{
+ struct pcu_sock_state *state = bts->pcu_state;
+ struct osmo_fd *bfd, *conn_bfd;
+
+ if (!state)
+ return;
+
+ conn_bfd = &state->conn_bfd;
+ if (conn_bfd->fd > 0)
+ pcu_sock_close(state);
+ bfd = &state->listen_bfd;
+ close(bfd->fd);
+ osmo_fd_unregister(bfd);
+ talloc_free(state);
+ bts->pcu_state = NULL;
+}
+
diff --git a/openbsc/src/libcommon/debug.c b/openbsc/src/libcommon/debug.c
index 0f8221198..f29f1683d 100644
--- a/openbsc/src/libcommon/debug.c
+++ b/openbsc/src/libcommon/debug.c
@@ -175,6 +175,11 @@ static const struct log_info_cat default_categories[] = {
.description = "SCCP User Adaptation Protocol",
.enabled = 1, .loglevel = LOGL_DEBUG,
},
+ [DPCU] = {
+ .name = "DPCU",
+ .description = "PCU Interface",
+ .enabled = 1, .loglevel = LOGL_DEBUG,
+ },
};
static int filter_fn(const struct log_context *ctx, struct log_target *tar)