forked from cellular-infrastructure/osmo-pcu
remove obsolete OpenBTS PCU interface support
This OpenBTS socket interface was originally added to enable GPRS capabilitie with a forked version of OpenBTS, at a time when the public OpenBTS release didn't yet have any GPRS support. Meanwhile, the later OpenBTS releases included their own version of GPRS, without any external PCU/SGSN/GGSN, so this interface is no longer needed. This also means that the OsmoBTS socket interface is now the default at compilation time. There is no other interface.master
parent
19d1e9270d
commit
08e5d604d3
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@ -27,14 +27,6 @@ PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty)
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PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 0.3.3)
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PKG_CHECK_MODULES(LIBOSMOGB, libosmogb >= 0.5.1.4)
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AC_MSG_CHECKING([whether to enable support for the osmo-bts layer 1 support])
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AC_ARG_ENABLE(osmo-bts,
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AC_HELP_STRING([--enable-osmo-bts],
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[enable support for osmo-bts L1 if [default=no]]),
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[enable_osmo_bts="$enableval"],[enable_osmo_bts="no"])
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AC_MSG_RESULT([$enable_osmo_bts])
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AM_CONDITIONAL(ENABLE_OSMOBTS, test "x$enable_osmo_bts" = "xyes")
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AC_MSG_CHECKING([whether to enable direct DSP access for PDCH of sysmocom-bts])
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AC_ARG_ENABLE(sysmocom-dsp,
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AC_HELP_STRING([--enable-sysmocom-dsp],
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@ -55,16 +55,9 @@ libgprs_la_SOURCES = \
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decoding.cpp \
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llc.cpp \
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rlc.cpp \
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osmobts_sock.cpp \
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gprs_codel.c
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if ENABLE_OSMOBTS
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libgprs_la_SOURCES += \
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osmobts_sock.cpp
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else
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libgprs_la_SOURCES += \
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openbts_sock.cpp
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endif
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bin_PROGRAMS = \
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osmo-pcu
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@ -1,192 +0,0 @@
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/* openbts_sock.cpp
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*
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* Copyright (C) 2012 Ivan Klyuchnikov
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <errno.h>
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#include <string.h>
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#include <gprs_rlcmac.h>
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#include <gprs_bssgp_pcu.h>
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#include <pcu_l1_if.h>
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#include <gprs_debug.h>
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#include <bitvector.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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extern "C" {
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/write_queue.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/gsm/gsm_utils.h>
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#include <pcuif_proto.h>
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}
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extern void *tall_pcu_ctx;
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struct femtol1_hdl {
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struct gsm_time gsm_time;
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uint32_t hLayer1; /* handle to the L1 instance in the DSP */
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uint32_t dsp_trace_f;
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uint16_t clk_cal;
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struct llist_head wlc_list;
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void *priv; /* user reference */
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struct osmo_timer_list alive_timer;
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unsigned int alive_prim_cnt;
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struct osmo_fd read_ofd; /* osmo file descriptors */
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struct osmo_wqueue write_q;
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struct {
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uint16_t arfcn;
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uint8_t tn;
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uint8_t tsc;
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uint16_t ta;
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} channel_info;
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};
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struct l1fwd_hdl {
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struct sockaddr_storage remote_sa;
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socklen_t remote_sa_len;
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struct osmo_wqueue udp_wq;
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struct femtol1_hdl *fl1h;
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};
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struct l1fwd_hdl *l1fh = talloc_zero(NULL, struct l1fwd_hdl);
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// TODO: We should move this parameters to config file.
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#define PCU_L1_IF_PORT 5944
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/* OpenBTS socket functions */
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int pcu_sock_send(struct msgb *msg)
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{
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if (osmo_wqueue_enqueue(&l1fh->udp_wq, msg) != 0) {
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LOGP(DPCU, LOGL_ERROR, "PCU write queue full. Dropping message.\n");
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msgb_free(msg);
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}
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return 0;
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}
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/* data has arrived on the udp socket */
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static int udp_read_cb(struct osmo_fd *ofd)
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{
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struct msgb *msg = msgb_alloc_headroom(2048, 128, "udp_rx");
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struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
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int rc;
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if (!msg)
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return -ENOMEM;
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msg->l1h = msg->data;
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l1fh->remote_sa_len = sizeof(l1fh->remote_sa);
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rc = recvfrom(ofd->fd, msg->l1h, msgb_tailroom(msg), 0,
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(struct sockaddr *) &l1fh->remote_sa, &l1fh->remote_sa_len);
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if (rc < 0) {
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perror("read from udp");
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msgb_free(msg);
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return rc;
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} else if (rc == 0) {
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perror("len=0 read from udp");
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msgb_free(msg);
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return rc;
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}
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msgb_put(msg, rc);
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struct gsm_pcu_if *pcu_prim = (gsm_pcu_if *)(msg->l1h);
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rc = pcu_rx(pcu_prim->msg_type, pcu_prim);
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msgb_free(msg);
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return rc;
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}
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/* callback when we can write to the UDP socket */
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static int udp_write_cb(struct osmo_fd *ofd, struct msgb *msg)
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{
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int rc;
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struct l1fwd_hdl *l1fh = (l1fwd_hdl *)ofd->data;
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//LOGP(DPCU, LOGL_ERROR, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_length(msg));
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rc = sendto(ofd->fd, msgb_data(msg), msgb_length(msg), 0,
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(const struct sockaddr *)&l1fh->remote_sa, l1fh->remote_sa_len);
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if (rc < 0) {
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LOGP(DPCU, LOGL_ERROR, "error writing to L1 msg_queue: %s\n",
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strerror(errno));
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return rc;
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} else if (rc < (int)msgb_length(msg)) {
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LOGP(DPCU, LOGL_ERROR, "short write to L1 msg_queue: "
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"%u < %u\n", rc, msgb_length(msg));
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return -EIO;
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}
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return 0;
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}
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int pcu_l1if_open()
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{
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struct femtol1_hdl *fl1h;
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int rc;
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LOGP(DL1IF, LOGL_INFO, "Opening OsmoPCU L1 interface to OpenBTS\n");
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/* allocate new femtol1_handle */
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fl1h = talloc_zero(tall_pcu_ctx, struct femtol1_hdl);
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INIT_LLIST_HEAD(&fl1h->wlc_list);
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l1fh->fl1h = fl1h;
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fl1h->priv = l1fh;
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struct osmo_wqueue * queue = &((l1fh->fl1h)->write_q);
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osmo_wqueue_init(queue, 10);
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queue->bfd.when |= BSC_FD_READ;
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queue->bfd.data = l1fh;
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queue->bfd.priv_nr = 0;
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/* Open UDP */
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struct osmo_wqueue *wq = &l1fh->udp_wq;
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osmo_wqueue_init(wq, 10);
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wq->write_cb = udp_write_cb;
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wq->read_cb = udp_read_cb;
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wq->bfd.when |= BSC_FD_READ;
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wq->bfd.data = l1fh;
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wq->bfd.priv_nr = 0;
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rc = osmo_sock_init_ofd(&wq->bfd, AF_UNSPEC, SOCK_DGRAM,
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IPPROTO_UDP, NULL, PCU_L1_IF_PORT,
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OSMO_SOCK_F_BIND);
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if (rc < 0) {
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perror("sock_init");
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exit(1);
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}
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return 0;
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}
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void pcu_l1if_close(void)
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{
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gprs_bssgp_destroy();
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/* FIXME: cleanup l1if */
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talloc_free(l1fh->fl1h);
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exit(0);
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}
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