Alexander Couzens | c0d02cc | 2020-12-14 02:36:53 +0100 | [diff] [blame] | 1 | |
| 2 | #include <errno.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <stdio.h> |
| 5 | #include <getopt.h> |
| 6 | #include <signal.h> |
| 7 | |
| 8 | #include <osmocom/core/select.h> |
| 9 | #include <osmocom/core/application.h> |
| 10 | #include <osmocom/core/stats.h> |
| 11 | |
| 12 | #include <osmocom/gprs/gprs_ns2.h> |
| 13 | #include <osmocom/vty/vty.h> |
| 14 | #include <osmocom/vty/telnet_interface.h> |
| 15 | #include <osmocom/vty/command.h> |
| 16 | #include <osmocom/vty/ports.h> |
| 17 | #include <osmocom/vty/tdef_vty.h> |
| 18 | #include <osmocom/vty/logging.h> |
| 19 | #include <osmocom/vty/stats.h> |
| 20 | #include <osmocom/vty/misc.h> |
| 21 | |
| 22 | #include "config.h" |
| 23 | |
| 24 | void *tall_nsdummy_ctx = NULL; |
| 25 | static struct log_info log_info = {}; |
| 26 | static bool quit = false; |
| 27 | static bool config_given = false; |
| 28 | static bool daemonize = false; |
| 29 | static int vty_port = 0; |
| 30 | static char *config_file = NULL; |
| 31 | |
| 32 | static const char vty_copyright[] = |
| 33 | "Copyright (C) 2020 by by sysmocom - s.f.m.c. GmbH\r\n" |
| 34 | "Author: Alexander Couzens <lynxis@fe80.eu>\r\n" |
| 35 | "License GNU GPL version 2 or later\r\n" |
| 36 | "This is free software: you are free to change and redistribute it.\r\n" |
| 37 | "There is NO WARRANTY, to the extent permitted by law.\r\n"; |
| 38 | |
| 39 | static struct vty_app_info vty_info = { |
| 40 | .name = "OsmoNSdummy", |
| 41 | .version = PACKAGE_VERSION, |
| 42 | .copyright = vty_copyright, |
| 43 | }; |
| 44 | |
| 45 | static void print_help() |
| 46 | { |
| 47 | printf( "Some useful options:\n" |
| 48 | " -h --help This text\n" |
| 49 | " -c --config-file Specify the filename of the config file\n" |
| 50 | " -V --version Print version\n" |
| 51 | " -D --daemonize Fork the process into a background daemon\n" |
| 52 | " -p --vty-port PORT Set the vty port to listen on.\n" |
| 53 | "\nVTY reference generation:\n" |
| 54 | " --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n" |
| 55 | " --vty-ref-xml Generate the VTY reference XML output and exit.\n" |
| 56 | ); |
| 57 | } |
| 58 | |
| 59 | static void handle_long_options(const char *prog_name, const int long_option) |
| 60 | { |
| 61 | static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT; |
| 62 | |
| 63 | switch (long_option) { |
| 64 | case 1: |
| 65 | vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg); |
| 66 | if (vty_ref_mode < 0) { |
| 67 | fprintf(stderr, "%s: Unknown VTY reference generation " |
| 68 | "mode '%s'\n", prog_name, optarg); |
| 69 | exit(2); |
| 70 | } |
| 71 | break; |
| 72 | case 2: |
| 73 | fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n", |
| 74 | get_value_string(vty_ref_gen_mode_names, vty_ref_mode), |
| 75 | get_value_string(vty_ref_gen_mode_desc, vty_ref_mode)); |
| 76 | vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode); |
| 77 | exit(0); |
| 78 | default: |
| 79 | fprintf(stderr, "%s: error parsing cmdline options\n", prog_name); |
| 80 | exit(2); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | static void handle_options(int argc, char **argv) |
| 85 | { |
| 86 | while (1) { |
| 87 | int option_idx = 0, c; |
| 88 | static int long_option = 0; |
| 89 | static const struct option long_options[] = { |
| 90 | { "help", 0, 0, 'h' }, |
| 91 | { "config-file", 1, 0, 'c' }, |
| 92 | { "version", 0, 0, 'V' }, |
| 93 | { "daemonize", 0, 0, 'D' }, |
| 94 | { "vty-port", 1, 0, 'p' }, |
| 95 | { "vty-ref-mode", 1, &long_option, 1 }, |
| 96 | { "vty-ref-xml", 0, &long_option, 2 }, |
| 97 | { 0, 0, 0, 0 } |
| 98 | }; |
| 99 | |
| 100 | c = getopt_long(argc, argv, "hc:p:VD", |
| 101 | long_options, &option_idx); |
| 102 | if (c == -1) |
| 103 | break; |
| 104 | |
| 105 | switch (c) { |
| 106 | case 'h': |
| 107 | print_help(); |
| 108 | exit(0); |
| 109 | break; |
| 110 | case 0: |
| 111 | handle_long_options(argv[0], long_option); |
| 112 | break; |
| 113 | case 'c': |
| 114 | if (config_file) |
| 115 | free(config_file); |
| 116 | config_file = optarg; |
| 117 | config_given = true; |
| 118 | break; |
| 119 | case 'p': |
| 120 | vty_port = atoi(optarg); |
| 121 | if (vty_port < 0 || vty_port > 65535) { |
| 122 | fprintf(stderr, "Invalid port %d given!\n", vty_port); |
| 123 | exit(1); |
| 124 | } |
| 125 | break; |
| 126 | case 'V': |
| 127 | print_version(1); |
| 128 | exit(0); |
| 129 | break; |
| 130 | case 'D': |
| 131 | daemonize = true; |
| 132 | break; |
| 133 | default: |
| 134 | fprintf(stderr, "Unknown option '%c'\n", c); |
| 135 | exit(0); |
| 136 | break; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | if (!config_file) |
| 141 | config_file = "osmo-ns-dummy.cfg"; |
| 142 | if (!vty_port) { |
| 143 | fprintf(stderr, "A vty port need to be specified (-p)\n"); |
| 144 | exit(1); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | void sighandler(int sigset) |
| 149 | { |
| 150 | if (sigset == SIGPIPE) |
| 151 | return; |
| 152 | |
| 153 | fprintf(stderr, "Signal %d received.\n", sigset); |
| 154 | |
| 155 | switch (sigset) { |
| 156 | case SIGINT: |
| 157 | case SIGTERM: |
| 158 | /* If another signal is received afterwards, the program |
| 159 | * is terminated without finishing shutdown process. |
| 160 | */ |
| 161 | signal(SIGINT, SIG_DFL); |
| 162 | signal(SIGTERM, SIG_DFL); |
| 163 | signal(SIGPIPE, SIG_DFL); |
| 164 | signal(SIGABRT, SIG_DFL); |
| 165 | signal(SIGUSR1, SIG_DFL); |
| 166 | signal(SIGUSR2, SIG_DFL); |
| 167 | |
| 168 | quit = 1; |
| 169 | break; |
| 170 | case SIGABRT: |
| 171 | /* in case of abort, we want to obtain a talloc report and |
| 172 | * then run default SIGABRT handler, who will generate coredump |
| 173 | * and abort the process. abort() should do this for us after we |
| 174 | * return, but program wouldn't exit if an external SIGABRT is |
| 175 | * received. |
| 176 | */ |
| 177 | talloc_report_full(tall_nsdummy_ctx, stderr); |
| 178 | signal(SIGABRT, SIG_DFL); |
| 179 | raise(SIGABRT); |
| 180 | break; |
| 181 | case SIGUSR1: |
| 182 | case SIGUSR2: |
| 183 | talloc_report_full(tall_nsdummy_ctx, stderr); |
| 184 | break; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | /* called by the ns layer */ |
| 189 | int gprs_ns_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 190 | { |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 195 | { |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | int main (int argc, char *argv[]) |
| 201 | { |
| 202 | void *ctx = tall_nsdummy_ctx = talloc_named_const(NULL, 0, "osmo-ns-dummy"); |
| 203 | struct gprs_ns2_inst *nsi; |
| 204 | int rc = 0; |
| 205 | |
| 206 | osmo_init_logging2(ctx, &log_info); |
| 207 | log_set_use_color(osmo_stderr_target, 0); |
| 208 | log_set_print_filename(osmo_stderr_target, 0); |
| 209 | log_set_print_filename(osmo_stderr_target, 0); |
| 210 | log_set_log_level(osmo_stderr_target, LOGL_INFO); |
| 211 | msgb_talloc_ctx_init(ctx, 0); |
| 212 | osmo_stats_init(ctx); |
| 213 | rate_ctr_init(ctx); |
| 214 | |
| 215 | vty_info.tall_ctx = ctx; |
| 216 | vty_init(&vty_info); |
| 217 | logging_vty_add_cmds(); |
| 218 | osmo_stats_vty_add_cmds(); |
| 219 | osmo_talloc_vty_add_cmds(); |
| 220 | |
| 221 | handle_options(argc, argv); |
| 222 | |
| 223 | nsi = gprs_ns2_instantiate(ctx, gprs_ns_prim_cb, NULL); |
| 224 | if (!nsi) { |
| 225 | LOGP(DLNS, LOGL_ERROR, "Failed to create NS instance\n"); |
| 226 | exit(1); |
| 227 | } |
| 228 | |
Alexander Couzens | 03f88d9 | 2021-01-04 19:07:25 +0100 | [diff] [blame^] | 229 | gprs_ns2_dynamic_create_nse(nsi, true); |
Alexander Couzens | c0d02cc | 2020-12-14 02:36:53 +0100 | [diff] [blame] | 230 | gprs_ns2_vty2_init(nsi); |
| 231 | rc = vty_read_config_file(config_file, NULL); |
| 232 | if (rc < 0 && config_given) { |
| 233 | fprintf(stderr, "Failed to parse the config file: '%s'\n", |
| 234 | config_file); |
| 235 | exit(1); |
| 236 | } |
| 237 | if (rc < 0) |
| 238 | fprintf(stderr, "No config file: '%s' Using default config.\n", |
| 239 | config_file); |
| 240 | |
| 241 | rc = telnet_init_dynif(ctx, NULL, vty_get_bind_addr(), |
| 242 | vty_port); |
| 243 | if (rc < 0) { |
| 244 | fprintf(stderr, "Error initializing telnet\n"); |
| 245 | exit(1); |
| 246 | } |
| 247 | |
| 248 | signal(SIGINT, sighandler); |
| 249 | signal(SIGTERM, sighandler); |
| 250 | signal(SIGPIPE, sighandler); |
| 251 | signal(SIGABRT, sighandler); |
| 252 | signal(SIGUSR1, sighandler); |
| 253 | signal(SIGUSR2, sighandler); |
| 254 | osmo_init_ignore_signals(); |
| 255 | |
| 256 | if (daemonize) { |
| 257 | rc = osmo_daemonize(); |
| 258 | if (rc < 0) { |
| 259 | perror("Error during daemonize"); |
| 260 | exit(1); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | while (!quit) { |
| 265 | osmo_select_main(0); |
| 266 | } |
| 267 | |
| 268 | telnet_exit(); |
| 269 | gprs_ns2_free(nsi); |
| 270 | |
| 271 | talloc_report_full(tall_nsdummy_ctx, stderr); |
| 272 | talloc_free(tall_nsdummy_ctx); |
| 273 | |
| 274 | return 0; |
| 275 | } |