192 lines
4.6 KiB
C++
192 lines
4.6 KiB
C++
/* pcu_main.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 <gprs_bssgp_pcu.h>
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#include <arpa/inet.h>
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#include <pcu_l1_if.h>
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#include <gsm_timer.h>
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#include <gprs_debug.h>
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// TODO: We should move this parameters to config file.
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#define SGSN_IP "127.0.0.1"
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#define SGSN_PORT 23000
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#define NSVCI 4
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#define PCU_L1_IF_PORT 5944
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struct l1fwd_hdl *l1fh = talloc_zero(NULL, struct l1fwd_hdl);
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int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci)
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{
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int rc = 0;
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switch (event) {
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case GPRS_NS_EVT_UNIT_DATA:
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/* hand the message into the BSSGP implementation */
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rc = gprs_bssgp_pcu_rcvmsg(msg);
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break;
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default:
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LOGP(DPCU, LOGL_ERROR, "RLCMAC: Unknown event %u from NS\n", event);
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if (msg)
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talloc_free(msg);
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rc = -EIO;
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break;
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}
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return rc;
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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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struct femtol1_hdl *fl1h = l1fh->fl1h;
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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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rc = pcu_l1if_handle_l1prim(fl1h, 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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//DEBUGP(DGPRS, "UDP: Writing %u bytes for MQ_L1_WRITE queue\n", msgb_l1len(msg));
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rc = sendto(ofd->fd, msg->l1h, msgb_l1len(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 < msgb_l1len(msg)) {
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LOGP(DPCU, LOGL_ERROR, "short write to L1 msg_queue: "
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"%u < %u\n", rc, msgb_l1len(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 l1fwd_hdl *l1fh;
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struct femtol1_hdl *fl1h;
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int rc;
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/* allocate new femtol1_handle */
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fl1h = talloc_zero(NULL, 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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}
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int main(int argc, char *argv[])
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{
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uint16_t nsvci = NSVCI;
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struct gprs_ns_inst *sgsn_nsi;
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struct gprs_nsvc *nsvc;
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osmo_init_logging(&gprs_log_info);
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pcu_l1if_open();
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sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb);
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bssgp_nsi = sgsn_nsi;
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if (!bssgp_nsi)
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{
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LOGP(DPCU, LOGL_ERROR, "Unable to instantiate NS\n");
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exit(1);
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}
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bctx = btsctx_alloc(BVCI, NSEI);
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bctx->cell_id = CELL_ID;
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bctx->nsei = NSEI;
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bctx->ra_id.mnc = MNC;
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bctx->ra_id.mcc = MCC;
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bctx->ra_id.lac = PCU_LAC;
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bctx->ra_id.rac = PCU_RAC;
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bctx->bvci = BVCI;
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uint8_t cause = 39;
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gprs_ns_nsip_listen(sgsn_nsi);
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struct sockaddr_in dest;
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dest.sin_family = AF_INET;
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dest.sin_port = htons(SGSN_PORT);
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inet_aton(SGSN_IP, &dest.sin_addr);
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nsvc = nsip_connect(sgsn_nsi, &dest, NSEI, nsvci);
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unsigned i = 0;
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while (1)
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{
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osmo_gsm_timers_check();
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osmo_gsm_timers_prepare();
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osmo_gsm_timers_update();
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osmo_select_main(0);
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if (i == 7)
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{
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bssgp_tx_bvc_reset(bctx, BVCI, cause);
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}
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i++;
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}
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}
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