| /* pcu_main.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 <gprs_bssgp_pcu.h> |
| #include <arpa/inet.h> |
| #include <pcu_l1_if.h> |
| #include <gsm_timer.h> |
| #include <gprs_debug.h> |
| |
| // TODO: We should move this parameters to config file. |
| #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) |
| { |
| int rc = 0; |
| switch (event) { |
| case GPRS_NS_EVT_UNIT_DATA: |
| /* hand the message into the BSSGP implementation */ |
| rc = gprs_bssgp_pcu_rcvmsg(msg); |
| break; |
| default: |
| LOGP(DPCU, LOGL_ERROR, "RLCMAC: Unknown event %u from NS\n", event); |
| if (msg) |
| talloc_free(msg); |
| rc = -EIO; |
| break; |
| } |
| 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; |
| struct gprs_ns_inst *sgsn_nsi; |
| struct gprs_nsvc *nsvc; |
| osmo_init_logging(&gprs_log_info); |
| pcu_l1if_open(); |
| |
| sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb); |
| bssgp_nsi = sgsn_nsi; |
| |
| if (!bssgp_nsi) |
| { |
| LOGP(DPCU, LOGL_ERROR, "Unable to instantiate NS\n"); |
| exit(1); |
| } |
| bctx = btsctx_alloc(BVCI, NSEI); |
| bctx->cell_id = CELL_ID; |
| bctx->nsei = NSEI; |
| bctx->ra_id.mnc = MNC; |
| bctx->ra_id.mcc = MCC; |
| bctx->ra_id.lac = PCU_LAC; |
| bctx->ra_id.rac = PCU_RAC; |
| bctx->bvci = BVCI; |
| uint8_t cause = 39; |
| gprs_ns_nsip_listen(sgsn_nsi); |
| |
| struct sockaddr_in dest; |
| dest.sin_family = AF_INET; |
| dest.sin_port = htons(SGSN_PORT); |
| inet_aton(SGSN_IP, &dest.sin_addr); |
| |
| nsvc = nsip_connect(sgsn_nsi, &dest, NSEI, nsvci); |
| unsigned i = 0; |
| while (1) |
| { |
| osmo_gsm_timers_check(); |
| osmo_gsm_timers_prepare(); |
| osmo_gsm_timers_update(); |
| |
| osmo_select_main(0); |
| if (i == 7) |
| { |
| bssgp_tx_bvc_reset(bctx, BVCI, cause); |
| } |
| i++; |
| } |
| } |
| |