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
  27 DEFINE_MGROUP(NHRPD, "NHRP")
  28
  29 unsigned int debug_flags = 0;
  30
  31 struct thread_master *master;
  32 struct timeval current_time;
  33
  34 /* nhrpd options. */
  35 struct option longopts[] = {{0}};
  36
  37 /* nhrpd privileges */
  38 static zebra_capabilities_t _caps_p[] = {
  39         ZCAP_NET_RAW, ZCAP_NET_ADMIN,
  40         ZCAP_DAC_OVERRIDE, /* for now needed to write to
  41                               /proc/sys/net/ipv4/<if>/send_redirect */
  42 };
  43
  44 struct zebra_privs_t nhrpd_privs = {
  45 #if defined(FRR_USER) && defined(FRR_GROUP)
  46         .user = FRR_USER,
  47         .group = FRR_GROUP,
  48 #endif
  49 #ifdef VTY_GROUP
  50         .vty_group = VTY_GROUP,
  51 #endif
  52         .caps_p = _caps_p,
  53         .cap_num_p = ZEBRA_NUM_OF(_caps_p),
  54 };
  55
  56 static void parse_arguments(int argc, char **argv)
  57 {
  58         int opt;
  59
  60         while (1) {
  61                 opt = frr_getopt(argc, argv, 0);
  62                 if (opt < 0)
  63                         break;
  64
  65                 switch (opt) {
  66                 case 0:
  67                         break;
  68                 default:
  69                         frr_help_exit(1);
  70                         break;
  71                 }
  72         }
  73 }
  74
  75 static void nhrp_sigusr1(void)
  76 {
  77         zlog_rotate();
  78 }
  79
  80 static void nhrp_request_stop(void)
  81 {
  82         debugf(NHRP_DEBUG_COMMON, "Exiting...");
  83         frr_early_fini();
  84
  85         nhrp_shortcut_terminate();
  86         nhrp_nhs_terminate();
  87         nhrp_zebra_terminate();
  88         vici_terminate();
  89         evmgr_terminate();
  90         nhrp_vc_terminate();
  91         vrf_terminate();
  92
  93         debugf(NHRP_DEBUG_COMMON, "Done.");
  94         frr_fini();
  95
  96         exit(0);
  97 }
  98
  99 static struct quagga_signal_t sighandlers[] = {
 100         {
 101                 .signal = SIGUSR1,
 102                 .handler = &nhrp_sigusr1,
 103         },
 104         {
 105                 .signal = SIGINT,
 106                 .handler = &nhrp_request_stop,
 107         },
 108         {
 109                 .signal = SIGTERM,
 110                 .handler = &nhrp_request_stop,
 111         },
 112 };
 113
 114 FRR_DAEMON_INFO(nhrpd, NHRP, .vty_port = NHRP_VTY_PORT,
 115
 116                 .proghelp = "Implementation of the NHRP routing protocol.",
 117
 118                 .signals = sighandlers, .n_signals = array_size(sighandlers),
 119
 120                 .privs = &nhrpd_privs, )
 121
 122 int main(int argc, char **argv)
 123 {
 124         frr_preinit(&nhrpd_di, argc, argv);
 125         frr_opt_add("", longopts, "");
 126
 127         parse_arguments(argc, argv);
 128
 129         /* Library inits. */
 130         master = frr_init();
 131         vrf_init(NULL, NULL, NULL, NULL);
 132         nhrp_interface_init();
 133         resolver_init();
 134
 135         /* Run with elevated capabilities, as for all netlink activity
 136          * we need privileges anyway. */
 137         nhrpd_privs.change(ZPRIVS_RAISE);
 138
 139         netlink_init();
 140         evmgr_init();
 141         nhrp_vc_init();
 142         nhrp_packet_init();
 143         vici_init();
 144         nhrp_zebra_init();
 145         nhrp_shortcut_init();
 146
 147         nhrp_config_init();
 148
 149         frr_config_fork();
 150         frr_run(master);
 151         return 0;
 152 }