Split of L1 interface to be used with OpenBTS or sysmo-BTS

The OpenBTS socket functions are moved from main to pcu_l1_if.cpp.

New sysmo_l1_if.cpp is introduced. It used special unix socket interface
to connect to sysmo-BTS. This is required to access CCCH/RACH and info
about cell layout. Traffic is also forwarded via this interface, but
it direct access of L1 baseband DSP will be added soon.

In order to handle ready-to-send requests above l1_if, the transmit
queue (for downlink blocks) is moved to gprs_rlcmac.cpp.

The TBF instance additionally holds TRX and TS info, but this is only
a hack currently. TBF instance requires more details about allocated
ressources in the future.
zecke/hacks/quick-exit
Andreas Eversberg 11 years ago
parent f6b7ca5dd4
commit 0aed654ac7
  1. 9
      src/Makefile.am
  2. 3
      src/gprs_bssgp_pcu.cpp
  3. 108
      src/gprs_rlcmac.cpp
  4. 15
      src/gprs_rlcmac.h
  5. 204
      src/pcu_l1_if.cpp
  6. 57
      src/pcu_l1_if.h
  7. 94
      src/pcu_main.cpp
  8. 562
      src/sysmo_l1_if.cpp

@ -33,10 +33,17 @@ libgprs_la_SOURCES = \
gsm_rlcmac.cpp \
gprs_bssgp_pcu.cpp \
gprs_rlcmac.cpp \
pcu_l1_if.cpp \
gsm_timer.cpp \
bitvector.cpp
if ENABLE_SYSMOBTS
libgprs_la_SOURCES += \
sysmo_l1_if.cpp
else
libgprs_la_SOURCES += \
pcu_l1_if.cpp
endif
noinst_PROGRAMS = \
RLCMACTest \
pcu

@ -38,7 +38,8 @@ int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp)
if (tfi < 0) {
return tfi;
}
tbf = tbf_alloc(tfi);
/* FIXME: select right TRX/TS */
tbf = tbf_alloc(tfi, 0, 0);
tbf->direction = GPRS_RLCMAC_DL_TBF;
tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START;
tbf->tlli = ntohl(budh->tlli);

@ -24,6 +24,7 @@
LLIST_HEAD(gprs_rlcmac_tbfs);
void *rlcmac_tall_ctx;
LLIST_HEAD(block_queue);
int tfi_alloc()
{
@ -47,7 +48,7 @@ int tfi_alloc()
}
/* lookup TBF Entity (by TFI) */
static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi)
struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi)
{
struct gprs_rlcmac_tbf *tbf;
@ -58,7 +59,7 @@ static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi)
return NULL;
}
static struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli)
struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli)
{
struct gprs_rlcmac_tbf *tbf;
llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) {
@ -68,7 +69,7 @@ static struct gprs_rlcmac_tbf *tbf_by_tlli(uint32_t tlli)
return NULL;
}
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi)
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi, uint8_t trx, uint8_t ts)
{
struct gprs_rlcmac_tbf *tbf;
@ -77,12 +78,16 @@ struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi)
return NULL;
tbf->tfi = tfi;
tbf->trx = trx;
tbf->ts = ts;
tbf->arfcn = pcu_l1if_bts.trx[trx].arfcn;
tbf->tsc = pcu_l1if_bts.trx[trx].ts[ts].tsc;
llist_add(&tbf->list, &gprs_rlcmac_tbfs);
return tbf;
}
static void tbf_free(struct gprs_rlcmac_tbf *tbf)
void tbf_free(struct gprs_rlcmac_tbf *tbf)
{
llist_del(&tbf->list);
talloc_free(tbf);
@ -154,6 +159,13 @@ static void tbf_gsm_timer_start(struct gprs_rlcmac_tbf *tbf, unsigned int fT,
osmo_gsm_timer_schedule(&tbf->gsm_timer, frames);
}
static void gprs_rlcmac_enqueue_block(bitvec *block, int len)
{
struct msgb *msg = msgb_alloc(len, "rlcmac_dl");
bitvec_pack(block, msgb_put(msg, len));
msgb_enqueue(&block_queue, msg);
}
void write_packet_downlink_assignment(bitvec * dest, uint8_t tfi, uint32_t tlli, uint8_t tn, uint8_t ta, uint8_t tsc)
{
// TODO We should use our implementation of encode RLC/MAC Control messages.
@ -259,7 +271,7 @@ void write_packet_uplink_assignment(bitvec * dest, uint8_t tfi, uint32_t tlli)
// GSM 04.08 9.1.18 Immediate assignment
int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, uint32_t fn,
uint8_t ta, uint8_t tfi = 0, uint32_t tlli = 0)
uint8_t ta, uint16_t arfcn, uint8_t ts, uint8_t tsc, uint8_t tfi = 0, uint32_t tlli = 0)
{
unsigned wp = 0;
@ -277,10 +289,10 @@ int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra, uint
// GSM 04.08 10.5.2.25a Packet Channel Description
bitvec_write_field(dest, wp,0x1,5); // Channel type
bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.tn,3); // TN
bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.tsc,3); // TSC
bitvec_write_field(dest, wp,ts,3); // TN
bitvec_write_field(dest, wp,tsc,3); // TSC
bitvec_write_field(dest, wp,0x0,3); // non-hopping RF channel configuraion
bitvec_write_field(dest, wp,(l1fh->fl1h)->channel_info.arfcn,10); // ARFCN
bitvec_write_field(dest, wp,arfcn,10); // ARFCN
//10.5.2.30 Request Reference
bitvec_write_field(dest, wp,ra,8); // RA
@ -418,7 +430,7 @@ void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t *
LOGPC(DRLCMAC, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Uplink Ack -------------------------\n");
free(packet_uplink_ack);
pcu_l1if_tx(packet_uplink_ack_vec, GsmL1_Sapi_Pacch);
gprs_rlcmac_enqueue_block(packet_uplink_ack_vec, 23);
bitvec_free(packet_uplink_ack_vec);
}
@ -589,7 +601,7 @@ int gprs_rlcmac_rcv_control_block(bitvec *rlc_block)
uint8_t tfi = 0;
uint32_t tlli = 0;
struct gprs_rlcmac_tbf *tbf;
struct gprs_rlcmac_tbf *ul_tbf;
// struct gprs_rlcmac_tbf *ul_tbf;
RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t));
LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n");
@ -642,26 +654,79 @@ void gprs_rlcmac_rcv_block(bitvec *rlc_block)
}
}
int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, uint16_t ta)
struct msgb *gen_dummy_msg(void)
{
struct msgb *msg = msgb_alloc(23, "rlcmac_dl_idle");
// RLC/MAC filler with USF=1
bitvec *filler = bitvec_alloc(23);
bitvec_unhex(filler, "41942b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
bitvec_pack(filler, msgb_put(msg, 23));
bitvec_free(filler);
return msg;
}
void gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr)
{
struct msgb *msg;
set_current_fn(fn);
msg = msgb_dequeue(&block_queue);
if (!msg)
msg = gen_dummy_msg();
pcu_l1if_tx_pdtch(msg, trx, ts, arfcn, fn, block_nr);
}
int select_pdch(uint8_t *_trx, uint8_t *_ts)
{
uint8_t trx, ts;
for (trx = 0; trx < 8; trx++) {
for (ts = 0; ts < 8; ts++) {
if (pcu_l1if_bts.trx[trx].ts[ts].enable) {
*_trx = trx;
*_ts = ts;
return 0;
}
}
}
return -EBUSY;
}
int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta)
{
struct gprs_rlcmac_tbf *tbf;
uint8_t trx, ts;
if (select_pdch(&trx, &ts)) {
LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n");
/* FIXME: send reject */
return -EBUSY;
}
// Create new TBF
int tfi = tfi_alloc();
if (tfi < 0) {
return tfi;
}
tbf = tbf_alloc(tfi);
tbf = tbf_alloc(tfi, trx, ts);
if (qta < 0)
qta = 0;
if (qta > 252)
qta = 252;
tbf->ta = qta >> 2;
tbf->direction = GPRS_RLCMAC_UL_TBF;
tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START;
LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [UPLINK] START TFI: %u\n", tbf->tfi);
LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u RACH\n", tbf->tfi);
LOGP(DRLCMAC, LOGL_NOTICE, "RX: [PCU <- BTS] TFI: %u RACH qbit-ta=%d ra=%d, Fn=%d (%d,%d,%d)\n", tbf->tfi, qta, ra, Fn, (Fn / (26 * 51)) % 32, Fn % 51, Fn % 26);
LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u Packet Immidiate Assignment\n", tbf->tfi);
bitvec *immediate_assignment = bitvec_alloc(23);
bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
int len = write_immediate_assignment(immediate_assignment, 0, ra, Fn, ta, tbf->tfi);
pcu_l1if_tx(immediate_assignment, GsmL1_Sapi_Agch, len);
int len = write_immediate_assignment(immediate_assignment, 0, ra, Fn, tbf->ta, tbf->arfcn, tbf->ts, tbf->tsc, tbf->tfi);
pcu_l1if_tx_agch(immediate_assignment, len);
bitvec_free(immediate_assignment);
return 0;
}
// Send RLC data to OpenBTS.
@ -721,7 +786,7 @@ void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t tfi, uint8_t *pdu, int
encode_gsm_rlcmac_downlink_data(data_block_vector, data_block);
LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Downlink Data Block -------------------------\n");
free(data_block);
pcu_l1if_tx(data_block_vector, GsmL1_Sapi_Pdtch);
gprs_rlcmac_enqueue_block(data_block_vector, BLOCK_LEN);
bitvec_free(data_block_vector);
// Singular case, TS 44.060 10.4.14
@ -780,6 +845,8 @@ int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf)
start_index += block_data_len;
}
}
return 0;
}
/* Send Uplink unit-data to SGSN. */
@ -812,8 +879,8 @@ void gprs_rlcmac_downlink_assignment(gprs_rlcmac_tbf *tbf)
LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Immidiate Assignment (CCCH)\n", tbf->tfi, tbf->tlli);
bitvec *immediate_assignment = bitvec_alloc(23);
bitvec_unhex(immediate_assignment, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
int len = write_immediate_assignment(immediate_assignment, 1, 125, get_current_fn(), (l1fh->fl1h)->channel_info.ta, tbf->tfi, tbf->tlli);
pcu_l1if_tx(immediate_assignment, GsmL1_Sapi_Agch, len);
int len = write_immediate_assignment(immediate_assignment, 1, 125, get_current_fn(), tbf->ta, tbf->arfcn, tbf->ts, tbf->tsc, tbf->tfi, tbf->tlli);
pcu_l1if_tx_agch(immediate_assignment, len);
bitvec_free(immediate_assignment);
tbf_gsm_timer_start(tbf, 0, 120);
}
@ -823,15 +890,14 @@ void gprs_rlcmac_packet_downlink_assignment(gprs_rlcmac_tbf *tbf)
LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] TFI: %u TLLI: 0x%08x Packet DL Assignment\n", tbf->tfi, tbf->tlli);
bitvec *packet_downlink_assignment_vec = bitvec_alloc(23);
bitvec_unhex(packet_downlink_assignment_vec, "2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
write_packet_downlink_assignment(packet_downlink_assignment_vec, tbf->tfi, tbf->tlli, (l1fh->fl1h)->channel_info.tn,
(l1fh->fl1h)->channel_info.ta, (l1fh->fl1h)->channel_info.tsc);
write_packet_downlink_assignment(packet_downlink_assignment_vec, tbf->tfi, tbf->tlli, tbf->ts, tbf->ta, tbf->tsc);
RlcMacDownlink_t * packet_downlink_assignment = (RlcMacDownlink_t *)malloc(sizeof(RlcMacDownlink_t));
LOGP(DRLCMAC, LOGL_NOTICE, "+++++++++++++++++++++++++ TX : Packet Downlink Assignment +++++++++++++++++++++++++\n");
decode_gsm_rlcmac_downlink(packet_downlink_assignment_vec, packet_downlink_assignment);
LOGPC(DRLCMAC, LOGL_NOTICE, "\n");
LOGP(DRLCMAC, LOGL_NOTICE, "------------------------- TX : Packet Downlink Assignment -------------------------\n");
free(packet_downlink_assignment);
pcu_l1if_tx(packet_downlink_assignment_vec, GsmL1_Sapi_Pacch);
gprs_rlcmac_enqueue_block(packet_downlink_assignment_vec, 23);
bitvec_free(packet_downlink_assignment_vec);
tbf_gsm_timer_start(tbf, 0, 120);
}

@ -52,6 +52,8 @@ struct gprs_rlcmac_tbf {
uint8_t rlc_data[LLC_MAX_LEN];
uint16_t data_index;
uint8_t bsn;
uint8_t trx, ts, tsc;
uint16_t arfcn, ta;
struct osmo_timer_list timer;
unsigned int T; /* Txxxx number */
@ -66,13 +68,13 @@ extern struct llist_head gprs_rlcmac_tbfs;
int tfi_alloc();
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi);
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi, uint8_t trx, uint8_t ts);
static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi);
struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi);
static struct gprs_rlcmac_tbf *tbf_by_tlli(uint8_t tlli);
struct gprs_rlcmac_tbf *tbf_by_tlli(uint8_t tlli);
static void tbf_free(struct gprs_rlcmac_tbf *tbf);
void tbf_free(struct gprs_rlcmac_tbf *tbf);
/* TS 44.060 Section 10.4.7 Table 10.4.7.1: Payload Type field */
enum gprs_rlcmac_block_type {
@ -92,7 +94,10 @@ int gprs_rlcmac_rcv_control_block(bitvec *rlc_block);
void gprs_rlcmac_rcv_block(bitvec *rlc_block);
int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, uint16_t ta);
void gprs_rlcmac_rcv_rts_block(uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr);
int gprs_rlcmac_rcv_rach(uint8_t ra, uint32_t Fn, int16_t qta);
void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t tfi, uint8_t *pdu, int start_index, int end_index, uint8_t bsn, uint8_t fbi);

@ -17,12 +17,64 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <errno.h>
#include <string.h>
#include <gprs_rlcmac.h>
#include <pcu_l1_if.h>
#include <gprs_debug.h>
#include <bitvector.h>
#include <gsmL1prim.h>
#include <sys/socket.h>
#include <linux/in.h>
extern "C" {
#include <osmocom/core/talloc.h>
#include <osmocom/core/write_queue.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/timer.h>
#include <osmocom/gsm/gsm_utils.h>
}
#define MAX_UDP_LENGTH 1500
#define msgb_l1prim(msg) ((GsmL1_Prim_t *)(msg)->l1h)
struct femtol1_hdl {
struct gsm_time gsm_time;
uint32_t hLayer1; /* handle to the L1 instance in the DSP */
uint32_t dsp_trace_f;
uint16_t clk_cal;
struct llist_head wlc_list;
void *priv; /* user reference */
struct osmo_timer_list alive_timer;
unsigned int alive_prim_cnt;
struct osmo_fd read_ofd; /* osmo file descriptors */
struct osmo_wqueue write_q;
struct {
uint16_t arfcn;
uint8_t tn;
uint8_t tsc;
uint16_t ta;
} channel_info;
};
struct l1fwd_hdl {
struct sockaddr_storage remote_sa;
socklen_t remote_sa_len;
struct osmo_wqueue udp_wq;
struct femtol1_hdl *fl1h;
};
struct l1fwd_hdl *l1fh = talloc_zero(NULL, struct l1fwd_hdl);
struct pcu_l1if_bts pcu_l1if_bts;
// Variable for storage current FN.
int frame_number;
@ -46,34 +98,31 @@ struct msgb *l1p_msgb_alloc(void)
return msg;
}
struct msgb *gen_dummy_msg(void)
// Send RLC/MAC block to OpenBTS.
void pcu_l1if_tx_pdtch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr)
{
struct msgb *msg = l1p_msgb_alloc();
GsmL1_Prim_t *prim = msgb_l1prim(msg);
// RLC/MAC filler with USF=1
bitvec *filler = bitvec_alloc(23);
bitvec_unhex(filler, "41942b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
struct msgb *nmsg = l1p_msgb_alloc();
GsmL1_Prim_t *prim = msgb_l1prim(nmsg);
prim->id = GsmL1_PrimId_PhDataReq;
prim->u.phDataReq.sapi = GsmL1_Sapi_Pacch;
bitvec_pack(filler, prim->u.phDataReq.msgUnitParam.u8Buffer);
prim->u.phDataReq.msgUnitParam.u8Size = filler->data_len;
bitvec_free(filler);
return msg;
prim->u.phDataReq.sapi = GsmL1_Sapi_Pdtch;
memcpy(prim->u.phDataReq.msgUnitParam.u8Buffer, msg->data, msg->len);
prim->u.phDataReq.msgUnitParam.u8Size = msg->len;
osmo_wqueue_enqueue(&l1fh->udp_wq, nmsg);
msgb_free(msg);
}
// Send RLC/MAC block to OpenBTS.
void pcu_l1if_tx(bitvec * block, GsmL1_Sapi_t sapi, int len)
void pcu_l1if_tx_agch(bitvec * block, int len)
{
struct msgb *msg = l1p_msgb_alloc();
struct osmo_wqueue * queue;
queue = &((l1fh->fl1h)->write_q);
GsmL1_Prim_t *prim = msgb_l1prim(msg);
prim->id = GsmL1_PrimId_PhDataReq;
prim->u.phDataReq.sapi = sapi;
prim->u.phDataReq.sapi = GsmL1_Sapi_Agch;
bitvec_pack(block, prim->u.phDataReq.msgUnitParam.u8Buffer);
prim->u.phDataReq.msgUnitParam.u8Size = len;
osmo_wqueue_enqueue(queue, msg);
osmo_wqueue_enqueue(&l1fh->udp_wq, msg);
}
int pcu_l1if_rx_pdch(GsmL1_PhDataInd_t *data_ind)
@ -82,31 +131,27 @@ int pcu_l1if_rx_pdch(GsmL1_PhDataInd_t *data_ind)
bitvec_unpack(block, data_ind->msgUnitParam.u8Buffer);
gprs_rlcmac_rcv_block(block);
bitvec_free(block);
return 0;
}
static int handle_ph_connect_ind(struct femtol1_hdl *fl1, GsmL1_PhConnectInd_t *connect_ind)
{
pcu_l1if_bts.trx[0].arfcn = connect_ind->u16Arfcn;
pcu_l1if_bts.trx[0].ts[connect_ind->u8Tn].enable = 1;
pcu_l1if_bts.trx[0].ts[connect_ind->u8Tn].tsc = connect_ind->u8Tsc;
(l1fh->fl1h)->channel_info.arfcn = connect_ind->u16Arfcn;
(l1fh->fl1h)->channel_info.tn = connect_ind->u8Tn;
(l1fh->fl1h)->channel_info.tsc = connect_ind->u8Tsc;
LOGP(DL1IF, LOGL_NOTICE, "RX: [ PCU <- BTS ] PhConnectInd: ARFCN: %u TN: %u TSC: %u \n",
connect_ind->u16Arfcn, (unsigned)connect_ind->u8Tn, (unsigned)connect_ind->u8Tsc);
return 0;
}
static int handle_ph_readytosend_ind(struct femtol1_hdl *fl1, GsmL1_PhReadyToSendInd_t *readytosend_ind)
{
struct msgb *resp_msg;
struct osmo_wqueue * queue;
queue = &((l1fh->fl1h)->write_q);
set_current_fn(readytosend_ind->u32Fn);
resp_msg = msgb_dequeue(&queue->msg_queue);
if (!resp_msg) {
resp_msg = gen_dummy_msg();
if (!resp_msg)
return 0;
}
osmo_wqueue_enqueue(&l1fh->udp_wq, resp_msg);
gprs_rlcmac_rcv_rts_block(0,0, (l1fh->fl1h)->channel_info.arfcn, readytosend_ind->u32Fn, 0);
return 1;
}
@ -172,3 +217,104 @@ int pcu_l1if_handle_l1prim(struct femtol1_hdl *fl1, struct msgb *msg)
return rc;
}
/* OpenBTS socket functions */
// TODO: We should move this parameters to config file.
#define PCU_L1_IF_PORT 5944
/* data has arrived on the udp socket */
static int udp_read_cb(struct osmo_fd *ofd)
{
struct msgb *msg = msgb_alloc_headroom(2048, 128, "udp_rx");
struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
struct femtol1_hdl *fl1h = l1fh->fl1h;
int rc;
if (!msg)
return -ENOMEM;
msg->l1h = msg->data;
l1fh->remote_sa_len = sizeof(l1fh->remote_sa);
rc = recvfrom(ofd->fd, msg->l1h, msgb_tailroom(msg), 0,
(struct sockaddr *) &l1fh->remote_sa, &l1fh->remote_sa_len);
if (rc < 0) {
perror("read from udp");
msgb_free(msg);
return rc;
} else if (rc == 0) {
perror("len=0 read from udp");
msgb_free(msg);
return rc;
}
msgb_put(msg, rc);
rc = pcu_l1if_handle_l1prim(fl1h, msg);
return rc;
}
/* callback when we can write to the UDP socket */
static int udp_write_cb(struct osmo_fd *ofd, struct msgb *msg)
{
int rc;
struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
//DEBUGP(DGPRS, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_l1len(msg));
rc = sendto(ofd->fd, msg->l1h, msgb_l1len(msg), 0,
(const struct sockaddr *)&l1fh->remote_sa, l1fh->remote_sa_len);
if (rc < 0) {
LOGP(DPCU, LOGL_ERROR, "error writing to L1 msg_queue: %s\n",
strerror(errno));
return rc;
} else if (rc < (int)msgb_l1len(msg)) {
LOGP(DPCU, LOGL_ERROR, "short write to L1 msg_queue: "
"%u < %u\n", rc, msgb_l1len(msg));
return -EIO;
}
return 0;
}
int pcu_l1if_open()
{
//struct l1fwd_hdl *l1fh;
struct femtol1_hdl *fl1h;
int rc;
memset(&pcu_l1if_bts, 0, sizeof(pcu_l1if_bts));
/* allocate new femtol1_handle */
fl1h = talloc_zero(NULL, struct femtol1_hdl);
INIT_LLIST_HEAD(&fl1h->wlc_list);
l1fh->fl1h = fl1h;
fl1h->priv = l1fh;
struct osmo_wqueue * queue = &((l1fh->fl1h)->write_q);
osmo_wqueue_init(queue, 10);
queue->bfd.when |= BSC_FD_READ;
queue->bfd.data = l1fh;
queue->bfd.priv_nr = 0;
/* Open UDP */
struct osmo_wqueue *wq = &l1fh->udp_wq;
osmo_wqueue_init(wq, 10);
wq->write_cb = udp_write_cb;
wq->read_cb = udp_read_cb;
wq->bfd.when |= BSC_FD_READ;
wq->bfd.data = l1fh;
wq->bfd.priv_nr = 0;
rc = osmo_sock_init_ofd(&wq->bfd, AF_UNSPEC, SOCK_DGRAM,
IPPROTO_UDP, NULL, PCU_L1_IF_PORT,
OSMO_SOCK_F_BIND);
if (rc < 0) {
perror("sock_init");
exit(1);
}
return 0;
}

@ -20,58 +20,41 @@
#ifndef PCU_L1_IF_H
#define PCU_L1_IF_H
#include <bitvector.h>
#include <gsmL1prim.h>
#include <sys/socket.h>
#include <stdint.h>
extern "C" {
#include <osmocom/core/write_queue.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/bitvec.h>
#include <osmocom/gsm/gsm_utils.h>
}
#define msgb_l1prim(msg) ((GsmL1_Prim_t *)(msg)->l1h)
struct femtol1_hdl {
struct gsm_time gsm_time;
uint32_t hLayer1; /* handle to the L1 instance in the DSP */
uint32_t dsp_trace_f;
uint16_t clk_cal;
struct llist_head wlc_list;
void *priv; /* user reference */
struct osmo_timer_list alive_timer;
unsigned int alive_prim_cnt;
struct osmo_fd read_ofd; /* osmo file descriptors */
struct osmo_wqueue write_q;
struct {
uint16_t arfcn;
uint8_t tn;
uint8_t tsc;
uint16_t ta;
} channel_info;
struct pcu_l1if_ts {
uint8_t enable;
uint8_t tsc;
};
struct l1fwd_hdl {
struct sockaddr_storage remote_sa;
socklen_t remote_sa_len;
struct osmo_wqueue udp_wq;
struct pcu_l1if_trx {
uint16_t arfcn;
struct pcu_l1if_ts ts[8];
};
struct femtol1_hdl *fl1h;
struct pcu_l1if_bts {
struct pcu_l1if_trx trx[8];
};
extern struct l1fwd_hdl *l1fh;
extern struct pcu_l1if_bts pcu_l1if_bts;
int get_current_fn();
void set_current_fn(int fn);
void pcu_l1if_tx(bitvec * block, GsmL1_Sapi_t sapi, int len = 23);
void pcu_l1if_tx_pdtch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr);
void pcu_l1if_tx_ptcch(msgb *msg, uint8_t trx, uint8_t ts, uint16_t arfcn,
uint32_t fn, uint8_t block_nr);
void pcu_l1if_tx_agch(bitvec * block, int len);
int pcu_l1if_handle_l1prim(struct femtol1_hdl *fl1h, struct msgb *msg);
int pcu_l1if_open(void);
void pcu_l1if_close(void);
#endif // PCU_L1_IF_H

@ -27,9 +27,6 @@
#define SGSN_IP "127.0.0.1"
#define SGSN_PORT 23000
#define NSVCI 4
#define PCU_L1_IF_PORT 5944
struct l1fwd_hdl *l1fh = talloc_zero(NULL, struct l1fwd_hdl);
int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci)
{
@ -49,97 +46,6 @@ int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg,
return rc;
}
/* data has arrived on the udp socket */
static int udp_read_cb(struct osmo_fd *ofd)
{
struct msgb *msg = msgb_alloc_headroom(2048, 128, "udp_rx");
struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
struct femtol1_hdl *fl1h = l1fh->fl1h;
int rc;
if (!msg)
return -ENOMEM;
msg->l1h = msg->data;
l1fh->remote_sa_len = sizeof(l1fh->remote_sa);
rc = recvfrom(ofd->fd, msg->l1h, msgb_tailroom(msg), 0,
(struct sockaddr *) &l1fh->remote_sa, &l1fh->remote_sa_len);
if (rc < 0) {
perror("read from udp");
msgb_free(msg);
return rc;
} else if (rc == 0) {
perror("len=0 read from udp");
msgb_free(msg);
return rc;
}
msgb_put(msg, rc);
rc = pcu_l1if_handle_l1prim(fl1h, msg);
return rc;
}
/* callback when we can write to the UDP socket */
static int udp_write_cb(struct osmo_fd *ofd, struct msgb *msg)
{
int rc;
struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
//DEBUGP(DGPRS, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_l1len(msg));
rc = sendto(ofd->fd, msg->l1h, msgb_l1len(msg), 0,
(const struct sockaddr *)&l1fh->remote_sa, l1fh->remote_sa_len);
if (rc < 0) {
LOGP(DPCU, LOGL_ERROR, "error writing to L1 msg_queue: %s\n",
strerror(errno));
return rc;
} else if (rc < msgb_l1len(msg)) {
LOGP(DPCU, LOGL_ERROR, "short write to L1 msg_queue: "
"%u < %u\n", rc, msgb_l1len(msg));
return -EIO;
}
return 0;
}
int pcu_l1if_open()
{
//struct l1fwd_hdl *l1fh;
struct femtol1_hdl *fl1h;
int rc;
/* allocate new femtol1_handle */
fl1h = talloc_zero(NULL, struct femtol1_hdl);
INIT_LLIST_HEAD(&fl1h->wlc_list);
l1fh->fl1h = fl1h;
fl1h->priv = l1fh;
struct osmo_wqueue * queue = &((l1fh->fl1h)->write_q);
osmo_wqueue_init(queue, 10);
queue->bfd.when |= BSC_FD_READ;
queue->bfd.data = l1fh;
queue->bfd.priv_nr = 0;
/* Open UDP */
struct osmo_wqueue *wq = &l1fh->udp_wq;
osmo_wqueue_init(wq, 10);
wq->write_cb = udp_write_cb;
wq->read_cb = udp_read_cb;
wq->bfd.when |= BSC_FD_READ;
wq->bfd.data = l1fh;
wq->bfd.priv_nr = 0;
rc = osmo_sock_init_ofd(&wq->bfd, AF_UNSPEC, SOCK_DGRAM,
IPPROTO_UDP, NULL, PCU_L1_IF_PORT,
OSMO_SOCK_F_BIND);
if (rc < 0) {
perror("sock_init");
exit(1);
}
}
int main(int argc, char *argv[])
{
uint16_t nsvci = NSVCI;

@ -0,0 +1,562 @@
/* sysmo_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.
*
* 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>
extern "C" {
#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 "../../osmo-bts/include/osmo-bts/pcuif_proto.h"
static int pcu_sock_send(struct msgb *msg);
static void pcu_sock_timeout(void *_priv);
struct pcu_l1if_bts pcu_l1if_bts;
// 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(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(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(bitvec * block, int len)
{
uint8_t data[24]; /* prefix PLEN */
/* FIXME: why does OpenBTS has no PLEN and no fill in message? */
bitvec_pack(block, data + 1);
data[0] = (len << 2) | 0x01;
pcu_tx_data_req(0, 0, PCU_IF_SAPI_AGCH, 0, 0, 0, data, 23);
}
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;
bitvec *block;
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:
block = bitvec_alloc(data_ind->len);
if (!block) {
rc = -ENOMEM;
break;
}
bitvec_unpack(block, data_ind->data);
gprs_rlcmac_rcv_block(block);
bitvec_free(block);
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;
}
static int pcu_rx_info_ind(struct gsm_pcu_if_info_ind *info_ind)
{
int rc = 0;
int trx, ts;
// uint8_t si13[23];
LOGP(DL1IF, LOGL_INFO, "Info indication received:\n");
if (!(info_ind->flags & PCU_IF_FLAG_ACTIVE)) {
LOGP(DL1IF, LOGL_NOTICE, "BTS not available\n");
return 0;
}
LOGP(DL1IF, LOGL_INFO, "BTS available\n");
for (trx = 0; trx < 8; trx++) {
pcu_l1if_bts.trx[trx].arfcn = info_ind->trx[trx].arfcn;
for (ts = 0; ts < 8; ts++) {
if ((info_ind->trx[trx].pdch_mask & (1 << ts))) {
/* FIXME: activate dynamically at RLCMAC */
if (!pcu_l1if_bts.trx[trx].ts[ts].enable)
pcu_tx_act_req(trx, ts, 1);
pcu_l1if_bts.trx[trx].ts[ts].enable = 1;
pcu_l1if_bts.trx[trx].ts[ts].tsc =
info_ind->trx[trx].tsc[ts];
LOGP(DL1IF, LOGL_INFO, "PDCH: trx=%d ts=%d\n",
trx, ts);
} else {
if (pcu_l1if_bts.trx[trx].ts[ts].enable)
pcu_tx_act_req(trx, ts, 0);
pcu_l1if_bts.trx[trx].ts[ts].enable = 0;
}
}
}
#warning FIXME: RAC
// rc = generate_si13(si13, 0 /* rac */);
// printf("rc=%d\n", rc);
// pcu_l1if_tx_bcch(si13, 23);
return rc;
}
static 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;
default:
LOGP(DL1IF, LOGL_ERROR, "Received unknwon PCU msg type %d\n",
msg_type);
rc = -EINVAL;
}
return rc;
}
/*
* SYSMO-PCU socket functions
*/
struct pcu_sock_state {
struct osmo_fd conn_bfd; /* fd for connection to lcr */
struct osmo_timer_list timer; /* socket connect retry timer */
struct llist_head upqueue; /* queue for sending messages */
} *pcu_sock_state = NULL;
static int pcu_sock_send(struct msgb *msg)
{
struct pcu_sock_state *state = pcu_sock_state;
struct osmo_fd *conn_bfd;
if (!state) {
LOGP(DL1IF, LOGL_NOTICE, "PCU socket not created, dropping "
"message\n");
return -EINVAL;
}
conn_bfd = &state->conn_bfd;
if (conn_bfd->fd <= 0) {
LOGP(DL1IF, LOGL_NOTICE, "PCU socket not connected, dropping "
"message\n");
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;
LOGP(DL1IF, LOGL_NOTICE, "PCU socket has LOST connection\n");
close(bfd->fd);
bfd->fd = -1;
osmo_fd_unregister(bfd);
/* flush the queue */
while (!llist_empty(&state->upqueue)) {
struct msgb *msg = msgb_dequeue(&state->upqueue);
msgb_free(msg);
}
/* disable all slots */
memset(&pcu_l1if_bts, 0, sizeof(pcu_l1if_bts));
state->timer.cb = pcu_sock_timeout;
osmo_timer_schedule(&state->timer, 5, 0);
}
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(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 = (struct pcu_sock_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(DL1IF, 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;
}
int pcu_l1if_open(void)
{
struct pcu_sock_state *state;
struct osmo_fd *bfd;
struct sockaddr_un local;
unsigned int namelen;
int rc;
memset(&pcu_l1if_bts, 0, sizeof(pcu_l1if_bts));
state = pcu_sock_state;
if (!state) {
state = talloc_zero(NULL, struct pcu_sock_state);
if (!state)
return -ENOMEM;
INIT_LLIST_HEAD(&state->upqueue);
}
bfd = &state->conn_bfd;
bfd->fd = socket(AF_UNIX, SOCK_SEQPACKET, 0);
if (bfd->fd < 0) {
LOGP(DL1IF, LOGL_ERROR, "Failed to create PCU-SYSMO socket.\n");
talloc_free(state);
return -1;
}
local.sun_family = AF_UNIX;
strncpy(local.sun_path, "/tmp/pcu_bts", sizeof(local.sun_path));
local.sun_path[sizeof(local.sun_path) - 1] = '\0';
/* we use the same magic that X11 uses in Xtranssock.c for
* calculating the proper length of the sockaddr */
#if defined(BSD44SOCKETS) || defined(__UNIXWARE__)
local.sun_len = strlen(local.sun_path);
#endif
#if defined(BSD44SOCKETS) || defined(SUN_LEN)
namelen = SUN_LEN(&local);
#else
namelen = strlen(local.sun_path) +
offsetof(struct sockaddr_un, sun_path);
#endif
rc = connect(bfd->fd, (struct sockaddr *) &local, namelen);
if (rc != 0) {
LOGP(DL1IF, LOGL_ERROR, "Failed to Connect the PCU-SYSMO "
"socket, delaying... '%s'\n", local.sun_path);
close(bfd->fd);
bfd->fd = -1;
state->timer.cb = pcu_sock_timeout;
osmo_timer_schedule(&state->timer, 5, 0);
return -1;
}
bfd->when = BSC_FD_READ;
bfd->cb = pcu_sock_cb;
bfd->data = state;
rc = osmo_fd_register(bfd);
if (rc < 0) {
LOGP(DL1IF, LOGL_ERROR, "Could not register PCU fd: %d\n", rc);
close(bfd->fd);
talloc_free(state);
return rc;
}
LOGP(DL1IF, LOGL_NOTICE, "PCU-SYSMO socket has been connected\n");
pcu_sock_state = state;
return 0;
}
void pcu_l1if_close(void)
{
struct pcu_sock_state *state = pcu_sock_state;
struct osmo_fd *bfd;
if (!state)
return;
if (osmo_timer_pending(&state->timer))
osmo_timer_del(&state->timer);
bfd = &state->conn_bfd;
if (bfd->fd > 0)
pcu_sock_close(state);
talloc_free(state);
pcu_sock_state = NULL;
}
static void pcu_sock_timeout(void *_priv)
{
pcu_l1if_open();
}
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