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/* NHRP daemon main functions
* Copyright (c) 2014-2015 Timo Teräs
*
* This file is free software: you may copy, redistribute 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.
*/
#include <unistd.h>
#include "zebra.h"
#include "privs.h"
#include "getopt.h"
#include "thread.h"
#include "sigevent.h"
#include "version.h"
#include "log.h"
#include "memory.h"
#include "memory_vty.h"
#include "command.h"
#include "libfrr.h"
#include "nhrpd.h"
#include "netlink.h"
DEFINE_MGROUP(NHRPD, "NHRP")
unsigned int debug_flags = 0;
struct thread_master *master;
struct timeval current_time;
static const char *pid_file = PATH_NHRPD_PID;
static char config_default[] = SYSCONFDIR NHRP_DEFAULT_CONFIG;
static char *config_file = NULL;
static int do_daemonise = 0;
/* nhrpd 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 }
};
/* nhrpd privileges */
static zebra_capabilities_t _caps_p [] = {
ZCAP_NET_RAW,
ZCAP_NET_ADMIN,
ZCAP_DAC_OVERRIDE, /* for now needed to write to /proc/sys/net/ipv4/<if>/send_redirect */
};
static struct zebra_privs_t nhrpd_privs = {
#ifdef QUAGGA_USER
.user = QUAGGA_USER,
#endif
#ifdef QUAGGA_GROUP
.group = QUAGGA_GROUP,
#endif
#ifdef VTY_GROUP
.vty_group = VTY_GROUP,
#endif
.caps_p = _caps_p,
.cap_num_p = ZEBRA_NUM_OF(_caps_p),
};
static void parse_arguments(int argc, char **argv)
{
int opt;
while (1) {
opt = frr_getopt(argc, argv, 0);
if(opt < 0) break;
switch (opt) {
case 0:
break;
case 'd':
do_daemonise = -1;
break;
case 'f':
config_file = optarg;
break;
case 'i':
pid_file = optarg;
break;
case 'z':
zclient_serv_path_set(optarg);
break;
default:
frr_help_exit(1);
break;
}
}
}
static void nhrp_sigusr1(void)
{
zlog_rotate(NULL);
}
static void nhrp_request_stop(void)
{
debugf(NHRP_DEBUG_COMMON, "Exiting...");
nhrp_shortcut_terminate();
nhrp_nhs_terminate();
nhrp_zebra_terminate();
vici_terminate();
evmgr_terminate();
nhrp_vc_terminate();
vrf_terminate();
/* memory_terminate(); */
/* vty_terminate(); */
cmd_terminate();
/* signal_terminate(); */
zprivs_terminate(&nhrpd_privs);
debugf(NHRP_DEBUG_COMMON, "Remove pid file.");
if (pid_file) unlink(pid_file);
debugf(NHRP_DEBUG_COMMON, "Done.");
closezlog(zlog_default);
exit(0);
}
static struct quagga_signal_t sighandlers[] = {
{ .signal = SIGUSR1, .handler = &nhrp_sigusr1, },
{ .signal = SIGINT, .handler = &nhrp_request_stop, },
{ .signal = SIGTERM, .handler = &nhrp_request_stop, },
};
FRR_DAEMON_INFO(nhrpd, NHRP,
.vty_port = NHRP_VTY_PORT,
.proghelp = "Implementation of the NHRP routing protocol.",
.signals = sighandlers,
.n_signals = array_size(sighandlers),
.privs = &nhrpd_privs,
)
int main(int argc, char **argv)
{
struct thread thread;
frr_preinit(&nhrpd_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");
parse_arguments(argc, argv);
/* Library inits. */
master = frr_init();
nhrp_interface_init();
vrf_init();
resolver_init();
/* Run with elevated capabilities, as for all netlink activity
* we need privileges anyway. */
nhrpd_privs.change(ZPRIVS_RAISE);
netlink_init();
evmgr_init();
nhrp_vc_init();
nhrp_packet_init();
vici_init();
nhrp_zebra_init();
nhrp_shortcut_init();
nhrp_config_init();
/* Get zebra configuration file. */
zlog_set_level(NULL, ZLOG_DEST_STDOUT, do_daemonise ? ZLOG_DISABLED : LOG_DEBUG);
vty_read_config(config_file, config_default);
if (do_daemonise && daemon(0, 0) < 0) {
zlog_err("daemonise: %s", safe_strerror(errno));
exit (1);
}
/* write pid file */
if (pid_output(pid_file) < 0) {
zlog_err("error while writing pidfile");
exit (1);
}
/* Create VTY socket */
frr_vty_serv(NHRP_VTYSH_PATH);
zlog_notice("nhrpd starting: vty@%d", nhrpd_di.vty_port);
/* Main loop */
while (thread_fetch(master, &thread))
thread_call(&thread);
return 0;
}
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