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/* osmocom includes */
/* (C) 2016 by Sebastian Stumpf <sebastian.stumpf87@googlemail.com>
* (C) 2017 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <osmocom/core/msgb.h>
#include <osmocom/core/select.h>
#include <osmocom/core/gsmtap.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <virtphy/virtual_um.h>
#include <virtphy/l1ctl_sock.h>
#include <virtphy/virt_l1_model.h>
#include <virtphy/l1ctl_sap.h>
#include <virtphy/gsmtapl1_if.h>
#include <virtphy/logging.h>
#include <virtphy/virt_l1_sched.h>
#define DEFAULT_LOG_MASK "DL1C,1:DVIRPHY,1:DMAIN,1"
/* this exists once in the program, and contains the state that we
* only keep once: L1CTL server socket, GSMTAP/VirtUM socket */
struct virtphy_context {
/* L1CTL socket server */
struct l1ctl_sock_inst *l1ctl_sock;
/* Virtual Um layer based on GSMTAP multicast */
struct virt_um_inst *virt_um;
};
static struct virtphy_context g_vphy;
static char *dl_rx_grp = DEFAULT_MS_MCAST_GROUP;
static char *ul_tx_grp = DEFAULT_BTS_MCAST_GROUP;
static int port = GSMTAP_UDP_PORT;
static char *log_mask = DEFAULT_LOG_MASK;
static char *l1ctl_sock_path = L1CTL_SOCK_PATH;
static char *arfcn_sig_lev_red_mask = NULL;
static char *pm_timeout = NULL;
static void handle_options(int argc, char **argv)
{
while (1) {
int option_index = 0, c;
static struct option long_options[] = {
{"dl-rx-grp", required_argument, 0, 'z'},
{"ul-tx-grp", required_argument, 0, 'y'},
{"port", required_argument, 0, 'x'},
{"log-mask", required_argument, 0, 'd'},
{"l1ctl-sock", required_argument, 0, 's'},
{"arfcn-sig-lev-red", required_argument, 0, 'r'},
{"pm-timeout", required_argument, 0, 't'},
{0, 0, 0, 0},
};
c = getopt_long(argc, argv, "z:y:x:d:s:r:t:", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'z':
dl_rx_grp = optarg;
break;
case 'y':
ul_tx_grp = optarg;
break;
case 'x':
port = atoi(optarg);
break;
case 'd':
log_mask = optarg;
break;
case 's':
l1ctl_sock_path = optarg;
break;
case 'r':
arfcn_sig_lev_red_mask = optarg;
break;
case 't':
pm_timeout = optarg;
break;
default:
break;
}
}
}
void parse_pm_timeout(struct l1_model_ms *model, char *pm_timeout) {
if (!pm_timeout || (strcmp(pm_timeout, "") == 0))
return;
/* seconds */
char *buf = strtok(pm_timeout, ":");
model->state.pm.timeout_s = atoi(buf);
/* microseconds */
buf = strtok(NULL, ":");
if (buf)
model->state.pm.timeout_us = atoi(buf);
}
/**
* arfcn_sig_lev_red_mask has to be formatted like 666,12:888,43:176,22
*/
void parse_arfcn_sig_lev_red(struct l1_model_ms *model, char * arfcn_sig_lev_red_mask) {
if (!arfcn_sig_lev_red_mask || (strcmp(arfcn_sig_lev_red_mask, "") == 0))
return;
char *token = strtok(arfcn_sig_lev_red_mask, ":");
do {
char* colon = strstr(token, ",");
uint16_t arfcn;
uint8_t red;
if (!colon)
continue;
colon[0] = '\0';
arfcn = atoi(token);
red = atoi(colon + 1);
/* TODO: this may go wild if the token string is not properly formatted */
model->state.pm.meas.arfcn_sig_lev_red_dbm[arfcn] = red;
} while ((token = strtok(NULL, ":")));
}
/* create a new l1_model_ms instance when L1CTL socket accept()s new connection */
static int l1ctl_accept_cb(struct l1ctl_sock_client *lsc)
{
struct l1_model_ms *ms = l1_model_ms_init(lsc, lsc, g_vphy.virt_um);
if (!ms)
return -ENOMEM;
/* apply timeout and arfcn reduction value config to model */
parse_pm_timeout(ms, pm_timeout);
parse_arfcn_sig_lev_red(ms, arfcn_sig_lev_red_mask);
lsc->priv = ms;
return 0;
}
int main(int argc, char *argv[])
{
/* init loginfo */
handle_options(argc, argv);
ms_log_init(log_mask);
LOGP(DVIRPHY, LOGL_INFO, "Virtual physical layer starting up...\n");
g_vphy.virt_um = virt_um_init(NULL, ul_tx_grp, port, dl_rx_grp, port,
gsmtapl1_rx_from_virt_um_inst_cb);
g_vphy.l1ctl_sock = l1ctl_sock_init(NULL, l1ctl_sap_rx_from_l23_inst_cb,
l1ctl_accept_cb, l1ctl_sock_path);
g_vphy.virt_um->priv = g_vphy.l1ctl_sock;
LOGP(DVIRPHY, LOGL_INFO,
"Virtual physical layer ready...\n \
Waiting for l23 app on %s",
l1ctl_sock_path);
while (1) {
/* handle osmocom fd READ events (l1ctl-unix-socket, virtual-um-mcast-socket) */
osmo_select_main(0);
}
l1ctl_sock_destroy(g_vphy.l1ctl_sock);
virt_um_destroy(g_vphy.virt_um);
/* not reached */
return EXIT_FAILURE;
}
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