| |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <getopt.h> |
| #include <signal.h> |
| |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/application.h> |
| #include <osmocom/core/stats.h> |
| |
| #include <osmocom/gprs/gprs_ns2.h> |
| #include <osmocom/vty/vty.h> |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/command.h> |
| #include <osmocom/vty/ports.h> |
| #include <osmocom/vty/tdef_vty.h> |
| #include <osmocom/vty/logging.h> |
| #include <osmocom/vty/stats.h> |
| #include <osmocom/vty/misc.h> |
| |
| #include "config.h" |
| |
| void *tall_nsdummy_ctx = NULL; |
| static struct log_info log_info = {}; |
| static bool quit = false; |
| static bool config_given = false; |
| static bool daemonize = false; |
| static int vty_port = 0; |
| static char *config_file = NULL; |
| struct gprs_ns2_inst *g_nsi; |
| |
| static const char vty_copyright[] = |
| "Copyright (C) 2020 by by sysmocom - s.f.m.c. GmbH\r\n" |
| "Author: Alexander Couzens <lynxis@fe80.eu>\r\n" |
| "License GNU GPL version 2 or later\r\n" |
| "This is free software: you are free to change and redistribute it.\r\n" |
| "There is NO WARRANTY, to the extent permitted by law.\r\n"; |
| |
| static struct vty_app_info vty_info = { |
| .name = "OsmoNSdummy", |
| .version = PACKAGE_VERSION, |
| .copyright = vty_copyright, |
| }; |
| |
| static void print_help() |
| { |
| printf( "Some useful options:\n" |
| " -h --help This text\n" |
| " -c --config-file Specify the filename of the config file\n" |
| " -V --version Print version\n" |
| " -D --daemonize Fork the process into a background daemon\n" |
| " -p --vty-port PORT Set the vty port to listen on.\n" |
| "\nVTY reference generation:\n" |
| " --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n" |
| " --vty-ref-xml Generate the VTY reference XML output and exit.\n" |
| ); |
| } |
| |
| static void handle_long_options(const char *prog_name, const int long_option) |
| { |
| static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT; |
| |
| switch (long_option) { |
| case 1: |
| vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg); |
| if (vty_ref_mode < 0) { |
| fprintf(stderr, "%s: Unknown VTY reference generation " |
| "mode '%s'\n", prog_name, optarg); |
| exit(2); |
| } |
| break; |
| case 2: |
| fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n", |
| get_value_string(vty_ref_gen_mode_names, vty_ref_mode), |
| get_value_string(vty_ref_gen_mode_desc, vty_ref_mode)); |
| vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode); |
| exit(0); |
| default: |
| fprintf(stderr, "%s: error parsing cmdline options\n", prog_name); |
| exit(2); |
| } |
| } |
| |
| static void handle_options(int argc, char **argv) |
| { |
| while (1) { |
| int option_idx = 0, c; |
| static int long_option = 0; |
| static const struct option long_options[] = { |
| { "help", 0, 0, 'h' }, |
| { "config-file", 1, 0, 'c' }, |
| { "version", 0, 0, 'V' }, |
| { "daemonize", 0, 0, 'D' }, |
| { "vty-port", 1, 0, 'p' }, |
| { "vty-ref-mode", 1, &long_option, 1 }, |
| { "vty-ref-xml", 0, &long_option, 2 }, |
| { 0, 0, 0, 0 } |
| }; |
| |
| c = getopt_long(argc, argv, "hc:p:VD", |
| long_options, &option_idx); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'h': |
| print_help(); |
| exit(0); |
| break; |
| case 0: |
| handle_long_options(argv[0], long_option); |
| break; |
| case 'c': |
| if (config_file) |
| free(config_file); |
| config_file = optarg; |
| config_given = true; |
| break; |
| case 'p': |
| vty_port = atoi(optarg); |
| if (vty_port < 0 || vty_port > 65535) { |
| fprintf(stderr, "Invalid port %d given!\n", vty_port); |
| exit(1); |
| } |
| break; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| case 'D': |
| daemonize = true; |
| break; |
| default: |
| fprintf(stderr, "Unknown option '%c'\n", c); |
| exit(0); |
| break; |
| } |
| } |
| |
| if (!config_file) |
| config_file = "osmo-ns-dummy.cfg"; |
| if (!vty_port) { |
| fprintf(stderr, "A vty port need to be specified (-p)\n"); |
| exit(1); |
| } |
| } |
| |
| 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 run default SIGABRT handler, who will generate coredump |
| * and abort the process. abort() should do this for us after we |
| * return, but program wouldn't exit if an external SIGABRT is |
| * received. |
| */ |
| talloc_report_full(tall_nsdummy_ctx, stderr); |
| signal(SIGABRT, SIG_DFL); |
| raise(SIGABRT); |
| break; |
| case SIGUSR1: |
| case SIGUSR2: |
| talloc_report_full(tall_nsdummy_ctx, stderr); |
| break; |
| } |
| } |
| |
| extern int g_mirror_mode; |
| |
| /* called by the ns layer */ |
| int gprs_ns_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| { |
| struct osmo_gprs_ns2_prim *nsp = container_of(oph, struct osmo_gprs_ns2_prim, oph); |
| |
| switch (oph->primitive) { |
| case GPRS_NS2_PRIM_UNIT_DATA: |
| if (g_mirror_mode) { |
| /* simply switch indication->request and resubmit */ |
| oph->operation = PRIM_OP_REQUEST; |
| msgb_pull_to_l3(oph->msg); |
| nsp->u.unitdata.link_selector = rand(); /* ensure random distribution */ |
| return gprs_ns2_recv_prim(g_nsi, oph); |
| } |
| break; |
| default: |
| break; |
| } |
| |
| if (oph->msg) |
| msgb_free(oph->msg); |
| |
| return 0; |
| } |
| |
| int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| { |
| return 0; |
| } |
| |
| extern int nsdummy_vty_init(void); |
| |
| int main (int argc, char *argv[]) |
| { |
| void *ctx = tall_nsdummy_ctx = talloc_named_const(NULL, 0, "osmo-ns-dummy"); |
| int rc = 0; |
| |
| osmo_init_logging2(ctx, &log_info); |
| log_set_use_color(osmo_stderr_target, 0); |
| log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE); |
| log_set_log_level(osmo_stderr_target, LOGL_INFO); |
| msgb_talloc_ctx_init(ctx, 0); |
| osmo_stats_init(ctx); |
| rate_ctr_init(ctx); |
| |
| vty_info.tall_ctx = ctx; |
| vty_init(&vty_info); |
| logging_vty_add_cmds(); |
| osmo_stats_vty_add_cmds(); |
| osmo_talloc_vty_add_cmds(); |
| |
| handle_options(argc, argv); |
| |
| g_nsi = gprs_ns2_instantiate(ctx, gprs_ns_prim_cb, NULL); |
| if (!g_nsi) { |
| LOGP(DLNS, LOGL_ERROR, "Failed to create NS instance\n"); |
| exit(1); |
| } |
| |
| gprs_ns2_vty_init(g_nsi); |
| nsdummy_vty_init(); |
| 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(ctx, NULL, vty_get_bind_addr(), |
| vty_port); |
| if (rc < 0) { |
| fprintf(stderr, "Error initializing telnet\n"); |
| exit(1); |
| } |
| |
| signal(SIGINT, sighandler); |
| signal(SIGTERM, sighandler); |
| signal(SIGPIPE, sighandler); |
| signal(SIGABRT, sighandler); |
| signal(SIGUSR1, sighandler); |
| signal(SIGUSR2, sighandler); |
| osmo_init_ignore_signals(); |
| |
| if (daemonize) { |
| rc = osmo_daemonize(); |
| if (rc < 0) { |
| perror("Error during daemonize"); |
| exit(1); |
| } |
| } |
| |
| while (!quit) { |
| osmo_select_main(0); |
| } |
| |
| telnet_exit(); |
| gprs_ns2_free(g_nsi); |
| |
| talloc_report_full(tall_nsdummy_ctx, stderr); |
| talloc_free(tall_nsdummy_ctx); |
| |
| return 0; |
| } |