pathd/path_main.c

   1 /*
   2  * Copyright (C) 2020  NetDEF, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the Free
   6  * Software Foundation; either version 2 of the License, or (at your option)
   7  * any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; see the file COPYING; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18 #include <zebra.h>
  19
  20 #include <lib/version.h>
  21 #include "getopt.h"
  22 #include "thread.h"
  23 #include "command.h"
  24 #include "log.h"
  25 #include "memory.h"
  26 #include "privs.h"
  27 #include "sigevent.h"
  28 #include "libfrr.h"
  29 #include "vrf.h"
  30 #include "filter.h"
  31
  32 #include "pathd.h"
  33 #include "path_nb.h"
  34 #include "path_zebra.h"
  35 #include "path_errors.h"
  36
  37 char backup_config_file[256];
  38
  39 zebra_capabilities_t _caps_p[] = {};
  40
  41 struct zebra_privs_t pathd_privs = {
  42 #if defined(FRR_USER) && defined(FRR_GROUP)
  43         .user = FRR_USER,
  44         .group = FRR_GROUP,
  45 #endif
  46 #if defined(VTY_GROUP)
  47         .vty_group = VTY_GROUP,
  48 #endif
  49         .caps_p = _caps_p,
  50         .cap_num_p = array_size(_caps_p),
  51         .cap_num_i = 0};
  52
  53 struct option longopts[] = {{0}};
  54
  55 /* Master of threads. */
  56 struct thread_master *master;
  57
  58 static struct frr_daemon_info pathd_di;
  59
  60 /* SIGHUP handler. */
  61 static void sighup(void)
  62 {
  63         zlog_info("SIGHUP received");
  64
  65         /* Reload config file. */
  66         vty_read_config(NULL, pathd_di.config_file, config_default);
  67 }
  68
  69 /* SIGINT / SIGTERM handler. */
  70 static void sigint(void)
  71 {
  72         zlog_notice("Terminating on signal");
  73
  74         exit(0);
  75 }
  76
  77 /* SIGUSR1 handler. */
  78 static void sigusr1(void)
  79 {
  80         zlog_rotate();
  81 }
  82
  83 struct quagga_signal_t path_signals[] = {
  84         {
  85                 .signal = SIGHUP,
  86                 .handler = &sighup,
  87         },
  88         {
  89                 .signal = SIGUSR1,
  90                 .handler = &sigusr1,
  91         },
  92         {
  93                 .signal = SIGINT,
  94                 .handler = &sigint,
  95         },
  96         {
  97                 .signal = SIGTERM,
  98                 .handler = &sigint,
  99         },
 100 };
 101
 102 static const struct frr_yang_module_info *pathd_yang_modules[] = {
 103         &frr_filter_info,
 104         &frr_interface_info,
 105         &frr_pathd_info,
 106 };
 107
 108 #define PATH_VTY_PORT 2621
 109
 110 FRR_DAEMON_INFO(pathd, PATH, .vty_port = PATH_VTY_PORT,
 111
 112                 .proghelp = "Implementation of PATH.",
 113
 114                 .signals = path_signals, .n_signals = array_size(path_signals),
 115
 116                 .privs = &pathd_privs, .yang_modules = pathd_yang_modules,
 117                 .n_yang_modules = array_size(pathd_yang_modules),
 118 );
 119
 120 int main(int argc, char **argv, char **envp)
 121 {
 122         frr_preinit(&pathd_di, argc, argv);
 123         frr_opt_add("", longopts, "");
 124
 125         while (1) {
 126                 int opt;
 127
 128                 opt = frr_getopt(argc, argv, NULL);
 129
 130                 if (opt == EOF)
 131                         break;
 132
 133                 switch (opt) {
 134                 case 0:
 135                         break;
 136                 default:
 137                         frr_help_exit(1);
 138                         break;
 139                 }
 140         }
 141
 142         master = frr_init();
 143
 144         access_list_init();
 145
 146         path_error_init();
 147         path_zebra_init(master);
 148         path_cli_init();
 149
 150         frr_config_fork();
 151         frr_run(master);
 152
 153         /* Not reached. */
 154         return 0;
 155 }