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