| /* 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) |
| { |
| osmo_wqueue_enqueue(&l1fh->udp_wq, 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); |
| } |