diff options
Diffstat (limited to 'utils/osmo-ns-dummy.c')
-rw-r--r-- | utils/osmo-ns-dummy.c | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/utils/osmo-ns-dummy.c b/utils/osmo-ns-dummy.c new file mode 100644 index 00000000..890444cf --- /dev/null +++ b/utils/osmo-ns-dummy.c @@ -0,0 +1,316 @@ + +#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/ctrl/control_if.h> +#include <osmocom/ctrl/control_vty.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 int ctrl_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(void) +{ + 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" + " -r --ctrl-port PORT Set the ctrl 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' }, + { "ctrl-port", 1, 0, 'r' }, + { "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:r: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 VTY port %d given!\n", vty_port); + exit(1); + } + break; + case 'r': + ctrl_port = atoi(optarg); + if (ctrl_port < 0 || ctrl_port > 65535) { + fprintf(stderr, "Invalid CTRL port %d given!\n", ctrl_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"); + struct ctrl_handle *ctrl; + 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); + ctrl_vty_init(ctx); + 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_default(ctx, NULL, vty_port); + if (rc < 0) { + fprintf(stderr, "Error initializing telnet\n"); + exit(1); + } + + if (ctrl_port > 0) { + ctrl = ctrl_interface_setup(NULL, ctrl_port, NULL); + if (!ctrl) { + fprintf(stderr, "Failed to initialize control interface. Exiting.\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; +} |