frr/pimd/pim_main.c

/*
  PIM for Quagga
  Copyright (C) 2008  Everton da Silva Marques

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program; see the file COPYING; if not, write to the
  Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  MA 02110-1301 USA
*/

#include <zebra.h>

#include "log.h"
#include "privs.h" 
#include "version.h"
#include <getopt.h>
#include "command.h"
#include "thread.h"
#include <signal.h>

#include "memory.h"
#include "vrf.h"
#include "memory_vty.h"
#include "filter.h"
#include "vty.h"
#include "sigevent.h"
#include "version.h"
#include "prefix.h"
#include "plist.h"
#include "vrf.h"
#include "libfrr.h"

#include "pimd.h"
#include "pim_version.h"
#include "pim_signals.h"
#include "pim_zebra.h"
#include "pim_msdp.h"
#include "pim_iface.h"
#include "pim_rp.h"

extern struct host host;

char config_default[] = SYSCONFDIR PIMD_DEFAULT_CONFIG;

/* pimd options */
struct option longopts[] = {
  { "daemon",        no_argument,       NULL, 'd'},
  { "config_file",   required_argument, NULL, 'f'},
  { "pid_file",      required_argument, NULL, 'i'},
  { "socket",        required_argument, NULL, 'z'},
  { 0 }
};

/* pimd privileges */
zebra_capabilities_t _caps_p [] = 
{
  ZCAP_NET_ADMIN,
  ZCAP_SYS_ADMIN,
  ZCAP_NET_RAW,
  ZCAP_BIND,
};

/* pimd privileges to run with */
struct zebra_privs_t pimd_privs =
{
#if defined(FRR_USER) && defined(FRR_GROUP)
  .user = FRR_USER,
  .group = FRR_GROUP,
#endif
#ifdef VTY_GROUP
  .vty_group = VTY_GROUP,
#endif
  .caps_p = _caps_p,
  .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]),
  .cap_num_i = 0
};

const char *pid_file = PATH_PIMD_PID;

FRR_DAEMON_INFO(pimd, PIM,
	.vty_port = PIMD_VTY_PORT,

	.proghelp = "Implementation of the PIM routing protocol.",

	.signals = pimd_signals,
	.n_signals = 4 /* XXX array_size(pimd_signals) XXX*/,

	.privs = &pimd_privs,
)

int main(int argc, char** argv, char** envp) {
  int daemon_mode = 0;
  char *config_file = NULL;
  char *zebra_sock_path = NULL;
  struct thread thread;

  frr_preinit(&pimd_di, argc, argv);
  frr_opt_add("df:i:z:", longopts,
	"  -d, --daemon       Runs in daemon mode\n"
	"  -f, --config_file  Set configuration file name\n"
	"  -i, --pid_file     Set process identifier file name\n"
	"  -z, --socket       Set path of zebra socket\n"
	);

  /* this while just reads the options */
  while (1) {
    int opt;

    opt = frr_getopt(argc, argv, NULL);

    if (opt == EOF)
      break;
    
    switch (opt) {
    case 0:
      break;
    case 'd':
      daemon_mode = 1;
      break;
    case 'f':
      config_file = optarg;
      break;
    case 'i':
      pid_file = optarg;
      break;
    case 'z':
      zebra_sock_path = optarg;
      break;
    default:
      frr_help_exit (1);
      break;
    }
  }

  master = frr_init();

  zlog_notice("Quagga %s " PIMD_PROGNAME " %s starting",
	      FRR_VERSION, PIMD_VERSION);

  /* 
   * Initializations
   */
  cmd_init(1);
  vty_init(master);
  memory_init();
  vrf_init ();
  access_list_init();
  prefix_list_init ();
  prefix_list_add_hook (pim_rp_prefix_list_update);
  prefix_list_delete_hook (pim_rp_prefix_list_update);

  pim_route_map_init ();
  pim_init();
  pim_msdp_init (master);

  /*
   * Initialize zclient "update" and "lookup" sockets
   */
  pim_zebra_init(zebra_sock_path);

  zlog_notice("Loading configuration - begin");

  /* Get configuration file. */
  vty_read_config(config_file, config_default);

  /*
    Starting from here zlog_* functions will log according configuration
   */

  zlog_notice("Loading configuration - end");

  /* Change to the daemon program. */
  if (daemon_mode) {
    if (daemon(0, 0)) {
      zlog_warn("failed to daemonize");
    }
  }

  /* Process ID file creation. */
  pid_output(pid_file);

  frr_vty_serv (PIM_VTYSH_PATH);

  zlog_notice("Quagga %s " PIMD_PROGNAME " %s starting, VTY interface at port TCP %d",
              FRR_VERSION, PIMD_VERSION, pimd_di.vty_port);

#ifdef PIM_DEBUG_BYDEFAULT
  zlog_notice("PIM_DEBUG_BYDEFAULT: Enabling all debug commands");
  PIM_DO_DEBUG_PIM_EVENTS;
  PIM_DO_DEBUG_PIM_PACKETS;
  PIM_DO_DEBUG_PIM_TRACE;
  PIM_DO_DEBUG_IGMP_EVENTS;
  PIM_DO_DEBUG_IGMP_PACKETS;
  PIM_DO_DEBUG_IGMP_TRACE;
  PIM_DO_DEBUG_ZEBRA;
#endif

#ifdef PIM_CHECK_RECV_IFINDEX_SANITY
  zlog_notice("PIM_CHECK_RECV_IFINDEX_SANITY: will match sock/recv ifindex");
#ifdef PIM_REPORT_RECV_IFINDEX_MISMATCH
  zlog_notice("PIM_REPORT_RECV_IFINDEX_MISMATCH: will report sock/recv ifindex mismatch");
#endif
#endif

#ifdef PIM_UNEXPECTED_KERNEL_UPCALL
  zlog_notice("PIM_UNEXPECTED_KERNEL_UPCALL: report unexpected kernel upcall");
#endif

  while (thread_fetch(master, &thread))
    thread_call(&thread);

  zlog_err("%s %s: thread_fetch() returned NULL, exiting",
	   __FILE__, __PRETTY_FUNCTION__);

  /* never reached */
  return 0;
}