| /* 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 <pcu_l1_if.h> |
| #include <gprs_rlcmac.h> |
| #include <gsm_timer.h> |
| #include <gprs_debug.h> |
| #include <unistd.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <getopt.h> |
| #include <signal.h> |
| #include <sched.h> |
| #include <bts.h> |
| #include <gprs_coding_scheme.h> |
| #include <osmocom/pcu/pcuif_proto.h> |
| #include "gprs_bssgp_pcu.h" |
| |
| extern "C" { |
| #include "pcu_vty.h" |
| #include <osmocom/gprs/gprs_bssgp.h> |
| #include <osmocom/gprs/gprs_ns.h> |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/command.h> |
| #include <osmocom/vty/vty.h> |
| #include <osmocom/vty/ports.h> |
| #include <osmocom/core/rate_ctr.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/application.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/stats.h> |
| #include <osmocom/core/gsmtap.h> |
| #include <osmocom/core/gsmtap_util.h> |
| } |
| |
| extern struct gprs_nsvc *nsvc; |
| uint16_t spoof_mcc = 0, spoof_mnc = 0; |
| bool spoof_mnc_3_digits = false; |
| static int config_given = 0; |
| static char *config_file = strdup("osmo-pcu.cfg"); |
| extern struct vty_app_info pcu_vty_info; |
| void *tall_pcu_ctx = NULL; |
| extern void *bv_tall_ctx; |
| static int quit = 0; |
| static int rt_prio = -1; |
| static bool daemonize = false; |
| static const char *gsmtap_addr = "localhost"; // FIXME: use gengetopt's default value instead |
| |
| static void print_help() |
| { |
| printf( "Options:\n" |
| " -h --help This text\n" |
| " -c --config-file Specify the filename of the config " |
| "file\n" |
| " -m --mcc MCC Use given MCC instead of value " |
| "provided by BTS\n" |
| " -n --mnc MNC Use given MNC instead of value " |
| "provided by BTS\n" |
| " -V --version Print version\n" |
| " -r --realtime PRIO Use SCHED_RR with the specified " |
| "priority\n" |
| " -D --daemonize Fork the process into a background " |
| "daemon\n" |
| " -i --gsmtap-ip The destination IP used for GSMTAP\n" |
| ); |
| } |
| |
| /* FIXME: finally get some option parsing code into libosmocore */ |
| static void handle_options(int argc, char **argv) |
| { |
| while (1) { |
| int option_idx = 0, c; |
| static const struct option long_options[] = { |
| { "help", 0, 0, 'h' }, |
| { "config-file", 1, 0, 'c' }, |
| { "mcc", 1, 0, 'm' }, |
| { "mnc", 1, 0, 'n' }, |
| { "version", 0, 0, 'V' }, |
| { "realtime", 1, 0, 'r' }, |
| { "daemonize", 0, 0, 'D' }, |
| { "exit", 0, 0, 'e' }, |
| { "gsmtap-ip", 1, 0, 'i' }, |
| { 0, 0, 0, 0 } |
| }; |
| |
| c = getopt_long(argc, argv, "hc:m:n:Vr:De:i:", |
| long_options, &option_idx); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'h': |
| print_help(); |
| exit(0); |
| break; |
| case 'c': |
| free(config_file); |
| config_file = strdup(optarg); |
| config_given = 1; |
| break; |
| case 'm': |
| spoof_mcc = atoi(optarg); |
| break; |
| case 'n': |
| if (osmo_mnc_from_str(optarg, &spoof_mnc, &spoof_mnc_3_digits)) { |
| fprintf(stderr, "Error decoding MNC '%s'\n", optarg); |
| exit(1); |
| } |
| break; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| case 'i': |
| gsmtap_addr = optarg; |
| break; |
| case 'r': |
| rt_prio = atoi(optarg); |
| break; |
| case 'D': |
| daemonize = true; |
| break; |
| case 'e': |
| fprintf(stderr, "Warning: Option '-e' is deprecated!\n"); |
| break; |
| default: |
| fprintf(stderr, "Unknown option '%c'\n", c); |
| exit(0); |
| break; |
| } |
| } |
| } |
| |
| void sighandler(int sigset) |
| { |
| if (sigset == SIGPIPE) |
| return; |
| |
| fprintf(stderr, "Signal %d received.\n", sigset); |
| |
| switch (sigset) { |
| case SIGINT: |
| case SIGTERM: |
| /* If another signal is received afterwards, the program |
| * is terminated without finishing shutdown process. |
| */ |
| signal(SIGINT, SIG_DFL); |
| signal(SIGTERM, SIG_DFL); |
| signal(SIGPIPE, SIG_DFL); |
| signal(SIGABRT, SIG_DFL); |
| signal(SIGUSR1, SIG_DFL); |
| signal(SIGUSR2, SIG_DFL); |
| |
| quit = 1; |
| break; |
| case SIGABRT: |
| /* in case of abort, we want to obtain a talloc report |
| * and then return to the caller, who will abort the process |
| */ |
| case SIGUSR1: |
| case SIGUSR2: |
| talloc_report_full(tall_pcu_ctx, stderr); |
| break; |
| } |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| struct sched_param param; |
| struct gprs_rlcmac_bts *bts; |
| int rc; |
| |
| /* tall_pcu_ctx may already have been initialized in bts.cpp during early_init(). */ |
| if (!tall_pcu_ctx) { |
| tall_pcu_ctx = talloc_named_const(NULL, 1, "Osmo-PCU context"); |
| if (!tall_pcu_ctx) |
| return -ENOMEM; |
| osmo_init_logging2(tall_pcu_ctx, &gprs_log_info); |
| } |
| |
| bts = bts_main_data(); |
| bts->fc_interval = 1; |
| bts->initial_cs_dl = bts->initial_cs_ul = 1; |
| bts->initial_mcs_dl = bts->initial_mcs_ul = 1; |
| bts->cs1 = 1; |
| bts->n3101 = 10; |
| bts->n3103 = 4; |
| bts->n3105 = 8; |
| bts->alpha = 0; /* a = 0.0 */ |
| bts->si13_is_set = false; |
| bts->cs_adj_enabled = 1; |
| bts->cs_adj_upper_limit = 33; /* Decrease CS if the error rate is above */ |
| bts->cs_adj_lower_limit = 10; /* Increase CS if the error rate is below */ |
| bts->max_cs_ul = MAX_GPRS_CS; |
| bts->max_cs_dl = MAX_GPRS_CS; |
| bts->max_mcs_ul = MAX_EDGE_MCS; |
| bts->max_mcs_dl = MAX_EDGE_MCS; |
| /* CS-1 to CS-4 */ |
| bts->cs_lqual_ranges[0].low = -256; |
| bts->cs_lqual_ranges[0].high = 6; |
| bts->cs_lqual_ranges[1].low = 5; |
| bts->cs_lqual_ranges[1].high = 8; |
| bts->cs_lqual_ranges[2].low = 7; |
| bts->cs_lqual_ranges[2].high = 13; |
| bts->cs_lqual_ranges[3].low = 12; |
| bts->cs_lqual_ranges[3].high = 256; |
| |
| /* MCS-1 to MCS-9 */ |
| /* Default thresholds are referenced from literature */ |
| /* Fig. 2.3, Chapter 2, Optimizing Wireless Communication Systems, Springer (2009) */ |
| bts->mcs_lqual_ranges[0].low = -256; |
| bts->mcs_lqual_ranges[0].high = 6; |
| bts->mcs_lqual_ranges[1].low = 5; |
| bts->mcs_lqual_ranges[1].high = 8; |
| bts->mcs_lqual_ranges[2].low = 7; |
| bts->mcs_lqual_ranges[2].high = 13; |
| bts->mcs_lqual_ranges[3].low = 12; |
| bts->mcs_lqual_ranges[3].high = 15; |
| bts->mcs_lqual_ranges[4].low = 14; |
| bts->mcs_lqual_ranges[4].high = 17; |
| bts->mcs_lqual_ranges[5].low = 16; |
| bts->mcs_lqual_ranges[5].high = 18; |
| bts->mcs_lqual_ranges[6].low = 17; |
| bts->mcs_lqual_ranges[6].high = 20; |
| bts->mcs_lqual_ranges[7].low = 19; |
| bts->mcs_lqual_ranges[7].high = 24; |
| bts->mcs_lqual_ranges[8].low = 23; |
| bts->mcs_lqual_ranges[8].high = 256; |
| bts->cs_downgrade_threshold = 200; |
| |
| /* TODO: increase them when CRBB decoding is implemented */ |
| bts->ws_base = 64; |
| bts->ws_pdch = 0; |
| |
| bts->llc_codel_interval_msec = LLC_CODEL_USE_DEFAULT; |
| bts->llc_idle_ack_csec = 10; |
| |
| /* |
| * By default resegmentation is supported in DL |
| * can also be configured through VTY |
| */ |
| bts->dl_arq_type = EGPRS_ARQ1; |
| |
| bts->pcu_sock_path = talloc_strdup(tall_pcu_ctx, PCU_SOCK_DEFAULT); |
| |
| msgb_talloc_ctx_init(tall_pcu_ctx, 0); |
| |
| osmo_stats_init(tall_pcu_ctx); |
| rate_ctr_init(tall_pcu_ctx); |
| gprs_ns_set_log_ss(DNS); |
| bssgp_set_log_ss(DBSSGP); |
| |
| pcu_vty_info.tall_ctx = tall_pcu_ctx; |
| vty_init(&pcu_vty_info); |
| pcu_vty_init(); |
| |
| handle_options(argc, argv); |
| if ((!!spoof_mcc) + (!!spoof_mnc) == 1) { |
| fprintf(stderr, "--mcc and --mnc must be specified " |
| "together.\n"); |
| exit(0); |
| } |
| |
| bts->gsmtap = gsmtap_source_init(gsmtap_addr, GSMTAP_UDP_PORT, 1); |
| |
| if (bts->gsmtap) |
| gsmtap_source_add_sink(bts->gsmtap); |
| else |
| fprintf(stderr, "Failed to initialize GSMTAP for %s\n", gsmtap_addr); |
| |
| bssgp_nsi = gprs_ns_instantiate(&gprs_bssgp_ns_cb, tall_pcu_ctx); |
| if (!bssgp_nsi) { |
| LOGP(DBSSGP, LOGL_ERROR, "Failed to create NS instance\n"); |
| exit(1); |
| } |
| gprs_ns_vty_init(bssgp_nsi); |
| |
| rc = vty_read_config_file(config_file, NULL); |
| if (rc < 0 && config_given) { |
| fprintf(stderr, "Failed to parse the config file: '%s'\n", |
| config_file); |
| exit(1); |
| } |
| if (rc < 0) |
| fprintf(stderr, "No config file: '%s' Using default config.\n", |
| config_file); |
| |
| rc = telnet_init_dynif(tall_pcu_ctx, NULL, vty_get_bind_addr(), |
| OSMO_VTY_PORT_PCU); |
| if (rc < 0) { |
| fprintf(stderr, "Error initializing telnet\n"); |
| exit(1); |
| } |
| |
| if (!bts->alloc_algorithm) |
| bts->alloc_algorithm = alloc_algorithm_dynamic; |
| |
| rc = pcu_l1if_open(); |
| |
| if (rc < 0) |
| return rc; |
| |
| signal(SIGINT, sighandler); |
| signal(SIGTERM, sighandler); |
| signal(SIGPIPE, sighandler); |
| signal(SIGABRT, sighandler); |
| signal(SIGUSR1, sighandler); |
| signal(SIGUSR2, sighandler); |
| osmo_init_ignore_signals(); |
| |
| /* enable realtime priority for us */ |
| if (rt_prio != -1) { |
| memset(¶m, 0, sizeof(param)); |
| param.sched_priority = rt_prio; |
| rc = sched_setscheduler(getpid(), SCHED_RR, ¶m); |
| if (rc != 0) { |
| fprintf(stderr, "Setting SCHED_RR priority(%d) failed: %s\n", |
| param.sched_priority, strerror(errno)); |
| exit(1); |
| } |
| } |
| |
| if (daemonize) { |
| rc = osmo_daemonize(); |
| if (rc < 0) { |
| perror("Error during daemonize"); |
| exit(1); |
| } |
| } |
| |
| while (!quit) { |
| osmo_gsm_timers_check(); |
| osmo_gsm_timers_prepare(); |
| osmo_gsm_timers_update(); |
| |
| osmo_select_main(0); |
| } |
| |
| telnet_exit(); |
| |
| pcu_l1if_close(); |
| |
| bts_cleanup(); |
| talloc_report_full(tall_pcu_ctx, stderr); |
| talloc_free(tall_pcu_ctx); |
| |
| return 0; |
| } |