nhrpd/nhrp_main.c

   1 /* NHRP daemon main functions
   2  * Copyright (c) 2014-2015 Timo Teräs
   3  *
   4  * This file is free software: you may copy, redistribute and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  */
   9
  10 #include <unistd.h>
  11
  12 #include "zebra.h"
  13 #include "privs.h"
  14 #include "getopt.h"
  15 #include "thread.h"
  16 #include "sigevent.h"
  17 #include "version.h"
  18 #include "log.h"
  19 #include "memory.h"
  20 #include "memory_vty.h"
  21 #include "command.h"
  22 #include "libfrr.h"
  23
  24 #include "nhrpd.h"
  25 #include "netlink.h"
  26 #include "nhrp_errors.h"
  27
  28 DEFINE_MGROUP(NHRPD, "NHRP")
  29
  30 unsigned int debug_flags = 0;
  31
  32 struct thread_master *master;
  33 struct timeval current_time;
  34
  35 /* nhrpd options. */
  36 struct option longopts[] = {{0}};
  37
  38 /* nhrpd privileges */
  39 static zebra_capabilities_t _caps_p[] = {
  40         ZCAP_NET_RAW, ZCAP_NET_ADMIN,
  41         ZCAP_DAC_OVERRIDE, /* for now needed to write to
  42                               /proc/sys/net/ipv4/<if>/send_redirect */
  43 };
  44
  45 struct zebra_privs_t nhrpd_privs = {
  46 #if defined(FRR_USER) && defined(FRR_GROUP)
  47         .user = FRR_USER,
  48         .group = FRR_GROUP,
  49 #endif
  50 #ifdef VTY_GROUP
  51         .vty_group = VTY_GROUP,
  52 #endif
  53         .caps_p = _caps_p,
  54         .cap_num_p = ZEBRA_NUM_OF(_caps_p),
  55 };
  56
  57 static void parse_arguments(int argc, char **argv)
  58 {
  59         int opt;
  60
  61         while (1) {
  62                 opt = frr_getopt(argc, argv, 0);
  63                 if (opt < 0)
  64                         break;
  65
  66                 switch (opt) {
  67                 case 0:
  68                         break;
  69                 default:
  70                         frr_help_exit(1);
  71                         break;
  72                 }
  73         }
  74 }
  75
  76 static void nhrp_sigusr1(void)
  77 {
  78         zlog_rotate();
  79 }
  80
  81 static void nhrp_request_stop(void)
  82 {
  83         debugf(NHRP_DEBUG_COMMON, "Exiting...");
  84         frr_early_fini();
  85
  86         nhrp_shortcut_terminate();
  87         nhrp_nhs_terminate();
  88         nhrp_zebra_terminate();
  89         vici_terminate();
  90         evmgr_terminate();
  91         nhrp_vc_terminate();
  92         vrf_terminate();
  93
  94         debugf(NHRP_DEBUG_COMMON, "Done.");
  95         frr_fini();
  96
  97         exit(0);
  98 }
  99
 100 static struct quagga_signal_t sighandlers[] = {
 101         {
 102                 .signal = SIGUSR1,
 103                 .handler = &nhrp_sigusr1,
 104         },
 105         {
 106                 .signal = SIGINT,
 107                 .handler = &nhrp_request_stop,
 108         },
 109         {
 110                 .signal = SIGTERM,
 111                 .handler = &nhrp_request_stop,
 112         },
 113 };
 114
 115 FRR_DAEMON_INFO(nhrpd, NHRP, .vty_port = NHRP_VTY_PORT,
 116
 117                 .proghelp = "Implementation of the NHRP routing protocol.",
 118
 119                 .signals = sighandlers, .n_signals = array_size(sighandlers),
 120
 121                 .privs = &nhrpd_privs, )
 122
 123 int main(int argc, char **argv)
 124 {
 125         frr_preinit(&nhrpd_di, argc, argv);
 126         frr_opt_add("", longopts, "");
 127
 128         parse_arguments(argc, argv);
 129
 130         /* Library inits. */
 131         master = frr_init();
 132         nhrp_error_init();
 133         vrf_init(NULL, NULL, NULL, NULL);
 134         nhrp_interface_init();
 135         resolver_init();
 136
 137         /* Run with elevated capabilities, as for all netlink activity
 138          * we need privileges anyway. */
 139         nhrpd_privs.change(ZPRIVS_RAISE);
 140
 141         netlink_init();
 142         evmgr_init();
 143         nhrp_vc_init();
 144         nhrp_packet_init();
 145         vici_init();
 146         nhrp_zebra_init();
 147         nhrp_shortcut_init();
 148
 149         nhrp_config_init();
 150
 151         frr_config_fork();
 152         frr_run(master);
 153         return 0;
 154 }