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[] = {
  36         { 0 }
  37 };
  38
  39 /* nhrpd privileges */
  40 static zebra_capabilities_t _caps_p [] = {
  41         ZCAP_NET_RAW,
  42         ZCAP_NET_ADMIN,
  43         ZCAP_DAC_OVERRIDE,      /* for now needed to write to /proc/sys/net/ipv4/<if>/send_redirect */
  44 };
  45
  46 static struct zebra_privs_t nhrpd_privs = {
  47 #if defined(FRR_USER) && defined(FRR_GROUP)
  48         .user = FRR_USER,
  49         .group = FRR_GROUP,
  50 #endif
  51 #ifdef VTY_GROUP
  52         .vty_group = VTY_GROUP,
  53 #endif
  54         .caps_p = _caps_p,
  55         .cap_num_p = ZEBRA_NUM_OF(_caps_p),
  56 };
  57
  58 static void parse_arguments(int argc, char **argv)
  59 {
  60         int opt;
  61
  62         while (1) {
  63                 opt = frr_getopt(argc, argv, 0);
  64                 if(opt < 0) 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
  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         /* memory_terminate(); */
  93         /* vty_terminate(); */
  94         cmd_terminate();
  95         /* signal_terminate(); */
  96         zprivs_terminate(&nhrpd_privs);
  97
  98         debugf(NHRP_DEBUG_COMMON, "Done.");
  99
 100         closezlog();
 101
 102         exit(0);
 103 }
 104
 105 static struct quagga_signal_t sighandlers[] = {
 106         { .signal = SIGUSR1, .handler = &nhrp_sigusr1, },
 107         { .signal = SIGINT,  .handler = &nhrp_request_stop, },
 108         { .signal = SIGTERM, .handler = &nhrp_request_stop, },
 109 };
 110
 111 FRR_DAEMON_INFO(nhrpd, NHRP,
 112         .vty_port = NHRP_VTY_PORT,
 113
 114         .proghelp = "Implementation of the NHRP routing protocol.",
 115
 116         .signals = sighandlers,
 117         .n_signals = array_size(sighandlers),
 118
 119         .privs = &nhrpd_privs,
 120 )
 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         nhrp_interface_init();
 132         vrf_init(NULL, NULL, NULL, NULL);
 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 }