330 lines
8.3 KiB
C++
330 lines
8.3 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 <gprs_rlcmac.h>
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#include <gsm_timer.h>
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#include <gprs_debug.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <signal.h>
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#include <sched.h>
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#include <bts.h>
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extern "C" {
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#include "pcu_vty.h"
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/logging.h>
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#include <osmocom/vty/ports.h>
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#include <osmocom/core/stats.h>
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#include <osmocom/core/gsmtap.h>
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#include <osmocom/core/gsmtap_util.h>
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}
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extern struct gprs_nsvc *nsvc;
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uint16_t spoof_mcc = 0, spoof_mnc = 0;
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static int config_given = 0;
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static char *config_file = strdup("osmo-pcu.cfg");
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extern struct vty_app_info pcu_vty_info;
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void *tall_pcu_ctx;
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extern void *bv_tall_ctx;
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static int quit = 0;
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static int rt_prio = -1;
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static const char *gsmtap_addr = "localhost"; // FIXME: use gengetopt's default value instead
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static void print_help()
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{
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printf( "Some useful options:\n"
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" -h --help this text\n"
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" -c --config-file Specify the filename of the config "
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"file\n"
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" -m --mcc MCC use given MCC instead of value "
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"provided by BTS\n"
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" -n --mnc MNC use given MNC instead of value "
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"provided by BTS\n"
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" -V --version print version\n"
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" -r --realtime PRIO Use SCHED_RR with the specified "
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"priority\n"
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" -i --gsmtap-ip The destination IP used for GSMTAP.\n"
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);
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}
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/* FIXME: finally get some option parsing code into libosmocore */
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static void handle_options(int argc, char **argv)
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{
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while (1) {
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int option_idx = 0, c;
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static const struct option long_options[] = {
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{ "help", 0, 0, 'h' },
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{ "config-file", 1, 0, 'c' },
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{ "mcc", 1, 0, 'm' },
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{ "mnc", 1, 0, 'n' },
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{ "version", 0, 0, 'V' },
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{ "realtime", 1, 0, 'r' },
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{ "exit", 0, 0, 'e' },
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{ "gsmtap-ip", 1, 0, 'i' },
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{ 0, 0, 0, 0 }
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};
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c = getopt_long(argc, argv, "hc:m:n:Vr:e:i:",
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long_options, &option_idx);
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if (c == -1)
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break;
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switch (c) {
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case 'h':
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print_help();
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exit(0);
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break;
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case 'c':
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free(config_file);
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config_file = strdup(optarg);
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config_given = 1;
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break;
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case 'm':
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spoof_mcc = atoi(optarg);
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break;
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case 'n':
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spoof_mnc = atoi(optarg);
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break;
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case 'V':
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print_version(1);
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exit(0);
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break;
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case 'i':
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gsmtap_addr = optarg;
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break;
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case 'r':
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rt_prio = atoi(optarg);
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break;
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case 'e':
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fprintf(stderr, "Warning: Option '-e' is deprecated!\n");
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break;
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default:
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fprintf(stderr, "Unknown option '%c'\n", c);
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exit(0);
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break;
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}
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}
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}
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void sighandler(int sigset)
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{
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if (sigset == SIGHUP || sigset == SIGPIPE)
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return;
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fprintf(stderr, "Signal %d received.\n", sigset);
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switch (sigset) {
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case SIGINT:
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case SIGTERM:
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/* If another signal is received afterwards, the program
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* is terminated without finishing shutdown process.
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*/
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signal(SIGINT, SIG_DFL);
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signal(SIGHUP, SIG_DFL);
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signal(SIGTERM, SIG_DFL);
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signal(SIGPIPE, SIG_DFL);
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signal(SIGABRT, SIG_DFL);
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signal(SIGUSR1, SIG_DFL);
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signal(SIGUSR2, SIG_DFL);
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quit = 1;
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break;
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case SIGABRT:
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/* in case of abort, we want to obtain a talloc report
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* and then return to the caller, who will abort the process
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*/
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case SIGUSR1:
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case SIGUSR2:
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talloc_report_full(tall_pcu_ctx, stderr);
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break;
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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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struct sched_param param;
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struct gprs_rlcmac_bts *bts;
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int rc;
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tall_pcu_ctx = talloc_named_const(NULL, 1, "Osmo-PCU context");
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if (!tall_pcu_ctx)
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return -ENOMEM;
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bts = bts_main_data();
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bts->fc_interval = 1;
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bts->initial_cs_dl = bts->initial_cs_ul = 1;
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bts->initial_mcs_dl = bts->initial_mcs_ul = 1;
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bts->cs1 = 1;
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bts->t3142 = 20;
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bts->t3169 = 5;
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bts->t3191 = 5;
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bts->t3193_msec = 100;
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bts->t3195 = 5;
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bts->n3101 = 10;
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bts->n3103 = 4;
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bts->n3105 = 8;
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bts->alpha = 0; /* a = 0.0 */
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bts->ms_idle_sec = 60; /* slightly above T3314 (default 44s, 24.008, 11.2.2) */
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bts->cs_adj_enabled = 1;
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bts->cs_adj_upper_limit = 33; /* Decrease CS if the error rate is above */
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bts->cs_adj_lower_limit = 10; /* Increase CS if the error rate is below */
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bts->max_cs_ul = 4;
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bts->max_cs_dl = 4;
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bts->max_mcs_ul = MAX_GPRS_CS;
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bts->max_mcs_dl = MAX_GPRS_CS;
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/* CS-1 to CS-4 */
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bts->cs_lqual_ranges[0].low = -256;
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bts->cs_lqual_ranges[0].high = 6;
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bts->cs_lqual_ranges[1].low = 5;
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bts->cs_lqual_ranges[1].high = 8;
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bts->cs_lqual_ranges[2].low = 7;
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bts->cs_lqual_ranges[2].high = 13;
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bts->cs_lqual_ranges[3].low = 12;
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bts->cs_lqual_ranges[3].high = 256;
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/* MCS-1 to MCS-9 */
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/* Default thresholds are referenced from literature */
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/* Fig. 2.3, Chapter 2, Optimizing Wireless Communication Systems, Springer (2009) */
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bts->mcs_lqual_ranges[0].low = -256;
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bts->mcs_lqual_ranges[0].high = 6;
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bts->mcs_lqual_ranges[1].low = 5;
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bts->mcs_lqual_ranges[1].high = 8;
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bts->mcs_lqual_ranges[2].low = 7;
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bts->mcs_lqual_ranges[2].high = 13;
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bts->mcs_lqual_ranges[3].low = 12;
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bts->mcs_lqual_ranges[3].high = 15;
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bts->mcs_lqual_ranges[4].low = 14;
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bts->mcs_lqual_ranges[4].high = 17;
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bts->mcs_lqual_ranges[5].low = 16;
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bts->mcs_lqual_ranges[5].high = 18;
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bts->mcs_lqual_ranges[6].low = 17;
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bts->mcs_lqual_ranges[6].high = 20;
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bts->mcs_lqual_ranges[7].low = 19;
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bts->mcs_lqual_ranges[7].high = 24;
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bts->mcs_lqual_ranges[8].low = 23;
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bts->mcs_lqual_ranges[8].high = 256;
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bts->cs_downgrade_threshold = 200;
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/* TODO: increase them when CRBB decoding is implemented */
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bts->ws_base = 64;
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bts->ws_pdch = 0;
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bts->llc_codel_interval_msec = LLC_CODEL_USE_DEFAULT;
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bts->dl_tbf_idle_msec = 2000;
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bts->llc_idle_ack_csec = 10;
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/*
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* By default resegmentation is supported in DL
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* can also be configured through VTY
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*/
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bts->dl_arq_type = EGPRS_ARQ1;
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bts->pcu_sock_path = talloc_strdup(tall_pcu_ctx, PCU_SOCK_DEFAULT);
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msgb_talloc_ctx_init(tall_pcu_ctx, 0);
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osmo_init_logging(&gprs_log_info);
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osmo_stats_init(tall_pcu_ctx);
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rate_ctr_init(tall_pcu_ctx);
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gprs_ns_set_log_ss(DNS);
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bssgp_set_log_ss(DBSSGP);
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vty_init(&pcu_vty_info);
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pcu_vty_init(&gprs_log_info);
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handle_options(argc, argv);
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if ((!!spoof_mcc) + (!!spoof_mnc) == 1) {
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fprintf(stderr, "--mcc and --mnc must be specified "
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"together.\n");
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exit(0);
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}
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bts->gsmtap = gsmtap_source_init(gsmtap_addr, GSMTAP_UDP_PORT, 1);
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if (bts->gsmtap)
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gsmtap_source_add_sink(bts->gsmtap);
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else
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fprintf(stderr, "Failed to initialize GSMTAP for %s\n", gsmtap_addr);
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rc = vty_read_config_file(config_file, NULL);
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if (rc < 0 && config_given) {
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fprintf(stderr, "Failed to parse the config file: '%s'\n",
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config_file);
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exit(1);
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}
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if (rc < 0)
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fprintf(stderr, "No config file: '%s' Using default config.\n",
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config_file);
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rc = telnet_init_dynif(tall_pcu_ctx, NULL, vty_get_bind_addr(),
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OSMO_VTY_PORT_PCU);
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if (rc < 0) {
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fprintf(stderr, "Error initializing telnet\n");
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exit(1);
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}
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if (!bts->alloc_algorithm)
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bts->alloc_algorithm = alloc_algorithm_dynamic;
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rc = pcu_l1if_open();
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if (rc < 0)
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return rc;
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signal(SIGINT, sighandler);
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signal(SIGHUP, sighandler);
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signal(SIGTERM, sighandler);
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signal(SIGPIPE, sighandler);
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signal(SIGABRT, sighandler);
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signal(SIGUSR1, sighandler);
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signal(SIGUSR2, sighandler);
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/* enable realtime priority for us */
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if (rt_prio != -1) {
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memset(¶m, 0, sizeof(param));
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param.sched_priority = rt_prio;
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rc = sched_setscheduler(getpid(), SCHED_RR, ¶m);
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if (rc != 0) {
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fprintf(stderr, "Setting SCHED_RR priority(%d) failed: %s\n",
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param.sched_priority, strerror(errno));
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exit(1);
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}
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}
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while (!quit) {
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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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}
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telnet_exit();
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pcu_l1if_close();
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talloc_report_full(tall_pcu_ctx, stderr);
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talloc_free(tall_pcu_ctx);
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return 0;
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}
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