192 lines
4.5 KiB
C++
192 lines
4.5 KiB
C++
/* openbts_sock.cpp
|
|
*
|
|
* Copyright (C) 2012 Ivan Klyuchnikov
|
|
*
|
|
* 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 <errno.h>
|
|
#include <string.h>
|
|
#include <gprs_rlcmac.h>
|
|
#include <gprs_bssgp_pcu.h>
|
|
#include <pcu_l1_if.h>
|
|
#include <gprs_debug.h>
|
|
#include <bitvector.h>
|
|
#include <sys/socket.h>
|
|
#include <arpa/inet.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>
|
|
#include <pcuif_proto.h>
|
|
}
|
|
|
|
extern void *tall_pcu_ctx;
|
|
|
|
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);
|
|
|
|
// TODO: We should move this parameters to config file.
|
|
#define PCU_L1_IF_PORT 5944
|
|
|
|
/* OpenBTS socket functions */
|
|
|
|
int pcu_sock_send(struct msgb *msg)
|
|
{
|
|
if (osmo_wqueue_enqueue(&l1fh->udp_wq, msg) != 0) {
|
|
LOGP(DPCU, LOGL_ERROR, "PCU write queue full. Dropping message.\n");
|
|
msgb_free(msg);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
struct gsm_pcu_if *pcu_prim = (gsm_pcu_if *)(msg->l1h);
|
|
rc = pcu_rx(pcu_prim->msg_type, pcu_prim);
|
|
msgb_free(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;
|
|
|
|
//LOGP(DPCU, LOGL_ERROR, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_length(msg));
|
|
|
|
rc = sendto(ofd->fd, msgb_data(msg), msgb_length(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_length(msg)) {
|
|
LOGP(DPCU, LOGL_ERROR, "short write to L1 msg_queue: "
|
|
"%u < %u\n", rc, msgb_length(msg));
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pcu_l1if_open()
|
|
{
|
|
struct femtol1_hdl *fl1h;
|
|
int rc;
|
|
|
|
/* allocate new femtol1_handle */
|
|
fl1h = talloc_zero(tall_pcu_ctx, 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;
|
|
}
|
|
|
|
void pcu_l1if_close(void)
|
|
{
|
|
gprs_bssgp_destroy();
|
|
|
|
/* FIXME: cleanup l1if */
|
|
talloc_free(l1fh->fl1h);
|
|
|
|
exit(0);
|
|
}
|