| /* SPDX-License-Identifier: GPL-2.0 */ |
| #define _GNU_SOURCE |
| #include <getopt.h> |
| #include <unistd.h> |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <assert.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <sys/signalfd.h> |
| #include <signal.h> |
| #include <errno.h> |
| |
| #include <pthread.h> |
| |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/select.h> |
| #include <osmocom/core/application.h> |
| #include <osmocom/core/logging.h> |
| #include <osmocom/core/stats.h> |
| #include <osmocom/core/rate_ctr.h> |
| #include <osmocom/core/socket.h> |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/logging.h> |
| #include <osmocom/vty/stats.h> |
| #include <osmocom/vty/ports.h> |
| #include <osmocom/vty/command.h> |
| #include <osmocom/vty/misc.h> |
| |
| #include <osmocom/netif/stream.h> |
| |
| #include <jansson.h> |
| |
| #include "internal.h" |
| #include "netns.h" |
| #include "gtp.h" |
| |
| static void *g_tall_ctx; |
| static char *g_config_file = "osmo-uecups-daemon.cfg"; |
| static int g_daemonize; |
| extern struct vty_app_info g_vty_info; |
| |
| #include <pwd.h> |
| |
| static void sigchild_cb(struct osmo_signalfd *osfd, const struct signalfd_siginfo *fdsi) |
| { |
| struct gtp_daemon *d = osfd->data; |
| int pid, status; |
| |
| OSMO_ASSERT(fdsi->ssi_signo == SIGCHLD); |
| |
| /* it is known that classic signals coalesce: If you get multiple signals of the |
| * same type before a process is scheduled, the subsequent signals are dropped. This |
| * makes sense for SIGINT or something like this, but for SIGCHLD carrying the PID of |
| * the terminated process, it doesn't really. Linux had the chance to fix this when |
| * introducing signalfd() - but the developers decided not to fix it. So the signalfd_siginfo |
| * contains the PID of one process that terminated - but there may be any number of other |
| * processes that also have terminated, and for which we don't get events this way. */ |
| |
| while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
| child_terminated(d, pid, status); |
| |
| } |
| |
| static void signal_cb(struct osmo_signalfd *osfd, const struct signalfd_siginfo *fdsi) |
| { |
| switch (fdsi->ssi_signo) { |
| case SIGCHLD: |
| sigchild_cb(osfd, fdsi); |
| break; |
| case SIGUSR1: |
| talloc_report_full(g_tall_ctx, stderr); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static const struct log_info_cat log_categories[] = { |
| [DTUN] = { |
| .name ="DTUN", |
| .description = "Tunnel interface (tun device)", |
| .enabled = 1, .loglevel = LOGL_INFO, |
| }, |
| [DEP] = { |
| .name = "DEP", |
| .description = "GTP endpoint (UDP socket)", |
| .enabled = 1, .loglevel = LOGL_INFO, |
| }, |
| [DGT] = { |
| .name = "DGT", |
| .description = "GTP tunnel (session)", |
| .enabled = 1, .loglevel = LOGL_INFO, |
| }, |
| [DUECUPS] = { |
| .name = "DUECUPS", |
| .description = "UE Control User Plane Separation", |
| .enabled = 1, .loglevel = LOGL_DEBUG, |
| }, |
| |
| }; |
| |
| static const struct log_info log_info = { |
| .cat = log_categories, |
| .num_cat = ARRAY_SIZE(log_categories), |
| }; |
| |
| static void print_help() |
| { |
| printf("Some useful options:\n"); |
| printf(" -h --help is printing this text.\n"); |
| printf(" -c --config-file filename The config file to use.\n"); |
| printf(" -s --disable-color\n"); |
| printf(" -D --daemonize Fork the process into a background daemon\n"); |
| printf(" -V --version Print the version number\n"); |
| |
| printf("\nVTY reference generation:\n"); |
| printf(" --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n"); |
| printf(" --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_index = 0, c; |
| static int long_option = 0; |
| static struct option long_options[] = { |
| {"help", 0, 0, 'h'}, |
| {"config-file", 1, 0, 'c'}, |
| {"daemonize", 0, 0, 'D'}, |
| {"version", 0, 0, 'V'}, |
| {"disable-color", 0, 0, 's'}, |
| {"vty-ref-mode", 1, &long_option, 1}, |
| {"vty-ref-xml", 0, &long_option, 2}, |
| {0, 0, 0, 0}, |
| }; |
| |
| c = getopt_long(argc, argv, "hc:sVD", long_options, &option_index); |
| |
| 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': |
| g_config_file = talloc_strdup(g_tall_ctx, optarg); |
| break; |
| case 's': |
| log_set_use_color(osmo_stderr_target, 0); |
| break; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| case 'D': |
| g_daemonize = 1; |
| break; |
| default: |
| /* ignore */ |
| break; |
| }; |
| } |
| if (argc > optind) { |
| fprintf(stderr, "Unsupported positional arguments on command line\n"); |
| exit(2); |
| } |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int rc; |
| |
| g_tall_ctx = talloc_named_const(NULL, 0, "root"); |
| g_vty_info.tall_ctx = g_tall_ctx; |
| |
| osmo_init_ignore_signals(); |
| osmo_init_logging2(g_tall_ctx, &log_info); |
| log_enable_multithread(); |
| |
| g_daemon = gtp_daemon_alloc(g_tall_ctx); |
| OSMO_ASSERT(g_daemon); |
| |
| msgb_talloc_ctx_init(g_tall_ctx, 10); |
| osmo_stats_init(g_tall_ctx); |
| vty_init(&g_vty_info); |
| logging_vty_add_cmds(); |
| osmo_talloc_vty_add_cmds(); |
| osmo_stats_vty_add_cmds(); |
| rate_ctr_init(g_tall_ctx); |
| gtpud_vty_init(); |
| |
| handle_options(argc, argv); |
| |
| init_netns(); |
| |
| rc = vty_read_config_file(g_config_file, NULL); |
| if (rc < 0) { |
| fprintf(stderr, "Failed to open config file: '%s'\n", g_config_file); |
| exit(2); |
| } |
| |
| rc = telnet_init_dynif(g_daemon, NULL, vty_get_bind_addr(), OSMO_VTY_PORT_UECUPS); |
| if (rc < 0) |
| exit(1); |
| |
| /* UECUPS socket for control from control plane side */ |
| g_daemon->cups_link = cups_srv_link_create(g_daemon); |
| if (!g_daemon->cups_link) { |
| fprintf(stderr, "Failed to create CUPS socket %s:%u (%s)\n", |
| g_daemon->cfg.cups_local_ip, g_daemon->cfg.cups_local_port, strerror(errno)); |
| exit(1); |
| } |
| |
| /* block SIGCHLD via normal delivery; redirect it to signalfd */ |
| sigset_t sigset; |
| sigemptyset(&sigset); |
| sigaddset(&sigset, SIGCHLD); |
| sigaddset(&sigset, SIGUSR1); |
| sigprocmask(SIG_BLOCK, &sigset, NULL); |
| g_daemon->signalfd = osmo_signalfd_setup(g_daemon, sigset, signal_cb, g_daemon); |
| osmo_init_ignore_signals(); |
| |
| if (g_daemonize) { |
| rc = osmo_daemonize(); |
| if (rc < 0) { |
| perror("Error during daemonize"); |
| exit(1); |
| } |
| } |
| |
| while (1) { |
| osmo_select_main(0); |
| } |
| } |