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netsukuku/src/netsukuku.c

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/* This file is part of Netsukuku
* (c) Copyright 2005 Andrea Lo Pumo aka AlpT <alpt@freaknet.org>
*
* This source code 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 source code 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.
* Please refer to the GNU Public License for more details.
*
* You should have received a copy of the GNU Public License along with
* this source code; if not, write to:
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* --
* netsukuku.c:
* Where main() resides.
*/
#include "includes.h"
#include "common.h"
#include "conf.h"
#include "libnetlink.h"
#include "ll_map.h"
#include "request.h"
#include "pkts.h"
#include "if.h"
#include "bmap.h"
#include "netsukuku.h"
#include "qspn.h"
#include "accept.h"
#include "daemon.h"
#include "crypto.h"
#include "andna_cache.h"
#include "andna.h"
#include "radar.h"
#include "hook.h"
#include "rehook.h"
#include "ntk-console-server.h"
#include <pthread.h>
extern int errno;
extern char *optarg;
extern int optind, opterr, optopt;
int destroy_netsukuku_mutex;
int pid_saved;
int options_parsed = 0; /* How many times parse_options() has been called */
void
save_pid(void)
{
FILE *fd;
if (!(fd = fopen(server_opt.pid_file, "w")))
error("Couldn't create pid file \"%s\": %s",
server_opt.pid_file, strerror(errno));
fprintf(fd, "ntkd %ld\n", (long) getpid());
fclose(fd);
pid_saved = 1;
}
/*
* is_ntkd_already_running
*
* Returns 1 if there's already a ntkd running
*/
int
is_ntkd_already_running(void)
{
pid_t oldpid;
FILE *fd;
if (!(fd = fopen(server_opt.pid_file, "r"))) {
if (errno != ENOENT)
error("Cannot read pid file \"%s\": %s",
server_opt.pid_file, strerror(errno));
return 0;
}
fscanf(fd, "ntkd %d\n", &oldpid);
if (ferror(fd)) {
error("error reading pid file \"%s\": %s\n",
server_opt.pid_file, strerror(errno));
fclose(fd);
return 0;
}
fclose(fd);
return !kill(oldpid, 0);
}
int
ntk_load_maps(void)
{
if (file_exist(server_opt.int_map_file) &&
(me.int_map = load_map(server_opt.int_map_file, &me.cur_node)))
debug(DBG_NORMAL, "Internal map loaded");
else
me.int_map = init_map(0);
#if 0
/* Don't load the bnode map, it's useless */
if ((me.bnode_map = load_bmap(server_opt.bnode_map_file, me.ext_map,
FAMILY_LVLS, &me.bmap_nodes))) {
debug(DBG_NORMAL, "Bnode map loaded");
} else
#endif
bmap_levels_init(BMAP_LEVELS(FAMILY_LVLS), &me.bnode_map,
&me.bmap_nodes);
bmap_counter_init(BMAP_LEVELS(FAMILY_LVLS), &me.bmap_nodes_closed,
&me.bmap_nodes_opened);
if (file_exist(server_opt.ext_map_file) &&
(me.ext_map = load_extmap(server_opt.ext_map_file, &me.cur_quadg)))
debug(DBG_NORMAL, "External map loaded");
else
me.ext_map = init_extmap(FAMILY_LVLS, 0);
return 0;
}
int
ntk_save_maps(void)
{
debug(DBG_NORMAL, "Saving the internal map");
save_map(me.int_map, me.cur_node, server_opt.int_map_file);
#ifdef DEBUG
debug(DBG_NORMAL, "Saving the border nodes map");
save_bmap(me.bnode_map, me.bmap_nodes, me.ext_map, me.cur_quadg,
server_opt.bnode_map_file);
#endif
debug(DBG_NORMAL, "Saving the external map");
save_extmap(me.ext_map, MAXGROUPNODE, &me.cur_quadg,
server_opt.ext_map_file);
return 0;
}
int
ntk_free_maps(void)
{
bmap_levels_free(me.bnode_map, me.bmap_nodes);
bmap_counter_free(me.bmap_nodes_closed, me.bmap_nodes_opened);
free_extmap(me.ext_map, FAMILY_LVLS, 0);
free_map(me.int_map, 0);
return 0;
}
void
usage(void)
{
printf("Usage:\n"
" ntkd [-hvaldrRD46] [-i net_interface] [-c conf_file] [-l logfile]\n\n"
" -4 ipv4\n"
" -6 ipv6\n"
" -i Specify the interface after this\n\n"
" -a Prevents running the ANDNA daemon\n"
" -R Prevents editting /etc/resolv.conf\n"
" -D Prevents running as daemon (Does not fork to the background)\n"
"\n"
" -r Runs in restricted mode\n"
" -I Share your internet connection with other nodes\n"
"\n"
" -c configuration file\n"
" -l Enables logging to file\n"
"\n"
" -d Debug (Add more ds to get more info)\n"
" -h Shows this help\n"
" -v Shows the version you are using\n"
" -k Kills the running instance of ntkd\n"
" -C Runs the console server for Ntk-Console to connect to\n"
" -e Excludes an interface from usage I.E all interfaces except this one\n"
" -n Experimental, Currently meaningless argument\n to implement ntk netsplit\n http://netsukuku.freaknet.org/docs/main_doc/ntk_rfc/Ntk_net_split\n");
}
/*
* fill_default_options: fills the default values in the server_opt struct
*/
void
fill_default_options(void)
{
setzero(&server_opt, sizeof(server_opt));
server_opt.family = AF_INET;
server_opt.config_file = NTK_CONFIG_FILE;
server_opt.pid_file = NTK_PID_FILE;
server_opt.int_map_file = INT_MAP_FILE;
server_opt.ext_map_file = EXT_MAP_FILE;
server_opt.bnode_map_file = BNODE_MAP_FILE;
server_opt.andna_hnames_file = ANDNA_HNAMES_FILE;
server_opt.snsd_nodes_file = SNSD_NODES_FILE;
server_opt.andna_cache_file = ANDNA_CACHE_FILE;
server_opt.lclkey_file = LCLKEY_FILE;
server_opt.lcl_file = LCL_FILE;
server_opt.rhc_file = RHC_FILE;
server_opt.counter_c_file = COUNTER_C_FILE;
server_opt.daemon = 1;
server_opt.dbg_lvl = 0;
server_opt.disable_andna = 0;
server_opt.disable_resolvconf = 0;
server_opt.restricted = 0;
server_opt.restricted_class = 0;
server_opt.use_shared_inet = 1;
server_opt.ip_masq_script = IPMASQ_SCRIPT_FILE;
server_opt.tc_shaper_script = TCSHAPER_SCRIPT_FILE;
server_opt.max_connections = MAX_CONNECTIONS;
server_opt.max_accepts_per_host = MAX_ACCEPTS;
server_opt.max_accepts_per_host_time = FREE_ACCEPT_TIME;
}
/*
* fill_loaded_cfg_options
*
* stores in server_opt the options loaded from the configuration file
*/
void
fill_loaded_cfg_options(void)
{
char *value;
CONF_GET_STRN_VALUE(CONF_NTK_INT_MAP_FILE, &server_opt.int_map_file,
NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_NTK_BNODE_MAP_FILE,
&server_opt.bnode_map_file, NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_NTK_EXT_MAP_FILE, &server_opt.ext_map_file,
NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_ANDNA_HNAMES_FILE,
&server_opt.andna_hnames_file, NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_SNSD_NODES_FILE, &server_opt.snsd_nodes_file,
NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_ANDNA_CACHE_FILE,
&server_opt.andna_cache_file, NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_ANDNA_LCLKEY_FILE, &server_opt.lclkey_file,
NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_ANDNA_LCL_FILE, &server_opt.lcl_file,
NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_ANDNA_RHC_FILE, &server_opt.rhc_file,
NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_ANDNA_COUNTER_C_FILE,
&server_opt.counter_c_file, NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_NTK_PID_FILE, &server_opt.pid_file,
NAME_MAX - 1);
CONF_GET_INT_VALUE(CONF_NTK_MAX_CONNECTIONS,
server_opt.max_connections);
CONF_GET_INT_VALUE(CONF_NTK_MAX_ACCEPTS_PER_HOST,
server_opt.max_accepts_per_host);
CONF_GET_INT_VALUE(CONF_NTK_MAX_ACCEPTS_PER_HOST_TIME,
server_opt.max_accepts_per_host_time);
CONF_GET_INT_VALUE(CONF_DISABLE_ANDNA, server_opt.disable_andna);
CONF_GET_INT_VALUE(CONF_DISABLE_RESOLVCONF,
server_opt.disable_resolvconf);
CONF_GET_INT_VALUE(CONF_NTK_RESTRICTED_MODE, server_opt.restricted);
CONF_GET_INT_VALUE(CONF_NTK_RESTRICTED_CLASS,
server_opt.restricted_class);
CONF_GET_INT_VALUE(CONF_NTK_INTERNET_CONNECTION,
server_opt.inet_connection);
if ((value = CONF_GET_VALUE(CONF_NTK_INTERNET_GW))) {
if (str_to_inet_gw(value, &server_opt.inet_gw,
&server_opt.inet_gw_dev))
fatal
("Malformed `%s' option: \"%s\". Its syntax is \"IP:dev\"",
config_str[CONF_NTK_INTERNET_GW], value);
}
CONF_GET_INT_VALUE(CONF_NTK_INTERNET_UPLOAD, server_opt.my_upload_bw);
CONF_GET_INT_VALUE(CONF_NTK_INTERNET_DOWNLOAD,
server_opt.my_dnload_bw);
if (server_opt.my_upload_bw && server_opt.my_dnload_bw)
me.my_bandwidth =
bandwidth_in_8bit((server_opt.my_upload_bw +
server_opt.my_dnload_bw) / 2);
if ((value = CONF_GET_VALUE(CONF_NTK_INTERNET_PING_HOSTS))) {
server_opt.inet_hosts = parse_internet_hosts(value,
&server_opt.
inet_hosts_counter);
if (!server_opt.inet_hosts)
fatal("Malformed `%s' option: \"%s\". "
"Its syntax is host1:host2:...",
config_str[CONF_NTK_INTERNET_PING_HOSTS], value);
}
CONF_GET_INT_VALUE(CONF_SHARE_INTERNET, server_opt.share_internet);
CONF_GET_INT_VALUE(CONF_SHAPE_INTERNET, server_opt.shape_internet);
CONF_GET_INT_VALUE(CONF_USE_SHARED_INET, server_opt.use_shared_inet);
CONF_GET_STRN_VALUE(CONF_NTK_IP_MASQ_SCRIPT,
&server_opt.ip_masq_script, NAME_MAX - 1);
CONF_GET_STRN_VALUE(CONF_NTK_TC_SHAPER_SCRIPT,
&server_opt.tc_shaper_script, NAME_MAX - 1);
/* Clean the enviroment */
clear_config_env();
}
void
free_server_opt(void)
{
int i;
if (server_opt.config_file != NTK_CONFIG_FILE)
xfree(server_opt.config_file);
if (server_opt.pid_file != NTK_PID_FILE)
xfree(server_opt.pid_file);
if (server_opt.int_map_file != INT_MAP_FILE)
xfree(server_opt.int_map_file);
if (server_opt.ext_map_file != EXT_MAP_FILE)
xfree(server_opt.ext_map_file);
if (server_opt.bnode_map_file != BNODE_MAP_FILE)
xfree(server_opt.bnode_map_file);
if (server_opt.andna_hnames_file != ANDNA_HNAMES_FILE)
xfree(server_opt.andna_hnames_file);
if (server_opt.snsd_nodes_file != SNSD_NODES_FILE)
xfree(server_opt.snsd_nodes_file);
if (server_opt.andna_cache_file != ANDNA_CACHE_FILE)
xfree(server_opt.andna_cache_file);
if (server_opt.lclkey_file != LCLKEY_FILE)
xfree(server_opt.lclkey_file);
if (server_opt.lcl_file != LCL_FILE)
xfree(server_opt.lcl_file);
if (server_opt.rhc_file != RHC_FILE)
xfree(server_opt.rhc_file);
if (server_opt.counter_c_file != COUNTER_C_FILE)
xfree(server_opt.counter_c_file);
if (server_opt.ip_masq_script != IPMASQ_SCRIPT_FILE)
xfree(server_opt.ip_masq_script);
if (server_opt.tc_shaper_script != TCSHAPER_SCRIPT_FILE)
xfree(server_opt.tc_shaper_script);
if (server_opt.inet_gw_dev)
xfree(server_opt.inet_gw_dev);
for (i = 0; i < MAX_INTERFACES && server_opt.ifs[i]; i++)
xfree(server_opt.ifs[i]);
}
/* Removes specified existing interface, Ntkd should populate the device list
* prior to this.
* returns 0 on success, And closes ntkd on error.
*/
int
exclude_interface(void)
{
int i;
printf("Number of Interfaces in Use: %d\n", me.cur_ifs_n);
for (i = 0; i < me.cur_ifs_n; i++)
printf("Interface names in Use: %s", me.cur_ifs[i].dev_name);
for (i = 0; i < me.cur_ifs_n; i++) {
if (strcmp(me.cur_ifs[i].dev_name, optarg) == 0) {
printf("Interface %s removed, And replaced with %s",
me.cur_ifs[i].dev_name, me.cur_ifs[me.cur_ifs_n].dev_name);
ifs_del(me.cur_ifs, &me.cur_ifs_n, i);
return 0;
}
else
fatal("Interface %s not found!", optarg);
}
}
void
ntk_thread_creatation(void)
{
int x;
pthread_t console_recv_send_thread;
if (pthread_create
(&console_recv_send_thread, NULL, &console_recv_send, &x)) {
fprintf(stderr, "Error creating thread\n");
exit(-1);
}
}
void
parse_options(int argc, char **argv)
{
int c, saved_argc = argc;
optind = 0;
while (1) {
int option_index = 0;
static struct option long_options[] = {
{"help", 0, 0, 'h'},
{"iface", 1, 0, 'i'},
{"ipv6", 0, 0, '6'},
{"ipv4", 0, 0, '4'},
{"conf", 1, 0, 'c'},
{"logfile", 1, 0, 'l'},
{"no_andna", 0, 0, 'a'},
{"no_daemon", 0, 0, 'D'},
{"no_resolv", 0, 0, 'R'},
{"restricted", 0, 0, 'r'},
{"share-inet", 0, 0, 'I'},
{"debug", 0, 0, 'd'},
{"version", 0, 0, 'v'},
{"kill", 0, 0, 'k'},
{"exclude", 1, 0, 'e'},
{"console", 0, 0, 'C'},
{"netsplit", 1, 0, 'n'},
{0, 0, 0, 0}
};
c = getopt_long(argc, argv, "i:c:l:e:hvd64DRrIakC", long_options,
&option_index);
if (c == -1)
break;
switch (c) {
case 'n':
break;
case 'C':
ntk_thread_creatation();
break;
case 'v':
printf("%s\n", VERSION_STR);
exit(0);
break;
case 'e':
exclude_interface();
break;
case 'k':
if (is_ntkd_already_running() == 1) {
char process_name[256] = { 0 };
pid_t pid;
printf("...Closing ntkd...\n");
FILE *fd = fopen(server_opt.pid_file, "r");
while (fscanf(fd, "%s %d", process_name, &pid) != EOF) {
if (strcmp(process_name, "ntkd") == 0) {
kill(pid, SIGINT);
}
}
fclose(fd);
exit(0);
} else if (is_ntkd_already_running() == 0) {
printf("ntkd is not running\n ...Exiting...\n");
exit(0);
}
break;
case 'h':
usage();
exit(0);
break;
case '4':
server_opt.family = AF_INET;
break;
case '6':
#ifdef IPV6_DISABLED
fatal("The ipv6 is still not supported");
#endif
loginfo
("WARNING: The ipv6 support is still experimental and under "
"development, nothing is assured to work.");
server_opt.family = AF_INET6;
break;
case 'c':
server_opt.config_file = xstrndup(optarg, NAME_MAX - 1);
break;
case 'l':
if (log_to_file(optarg) < 0)
fatal(0);
break;
case 'i':
break;
case 'D':
server_opt.daemon = 0;
break;
case 'a':
server_opt.disable_andna = 1;
break;
case 'R':
server_opt.disable_resolvconf = 1;
break;
case 'r':
server_opt.restricted = 1;
/***
* This is a very dirty hack, but it handles
* the optional argument better than getopt.
*
* This is the problem:
* ntkd -abcrdefg
* If 'r' is an element that specifies an
* optional argument, then the "defg" string
* is taken as its arg, but this is not what
* we want because in this case '-r' is
* specified without its argument.
*
* So, what we do is checking if the argv
* next to the arg of 'r' begins with a '-'
* or not. If not, it is the option of '-r'
*
* The only thing that won't work is:
* ntkd -rOPTION
* it has to be specified in this way:
* ntkd -r OPTION
*/
if (argc > optind && argv[optind][0] != '-') {
server_opt.restricted_class = atoi(argv[optind]);
saved_argc--;
}
/**/ break;
case 'I':
server_opt.share_internet = 1;
if (!server_opt.restricted) {
loginfo("Share_internet=1. Assuming restricted=1");
server_opt.restricted = 1;
}
if (!server_opt.inet_connection) {
loginfo("Share_internet=1. Assuming inet_connection=1");
server_opt.inet_connection = 1;
}
break;
case 'd':
server_opt.dbg_lvl++;
break;
default:
usage();
exit(1);
break;
}
}
if (optind < saved_argc && !options_parsed) {
usage();
exit(1);
}
options_parsed++;
}
void
check_conflicting_options(void)
{
#define FATAL_NOT_SPECIFIED(str) fatal("You didn't specified the `%s' " \
"option in netsukuku.conf", \
(str)); \
if (!server_opt.pid_file)
FATAL_NOT_SPECIFIED("pid_file");
if (!server_opt.inet_hosts && server_opt.restricted)
FATAL_NOT_SPECIFIED("internet_ping_hosts");
if (server_opt.restricted && server_opt.share_internet &&
!file_exist(server_opt.ip_masq_script))
fatal("ip_masquerade_script \"%s\" is inexistent",
server_opt.ip_masq_script);
if (server_opt.shape_internet &&
!file_exist(server_opt.tc_shaper_script))
fatal("tc_shaper_script \"%s\" is inexistent",
server_opt.ip_masq_script);
if (!server_opt.restricted && server_opt.inet_connection)
fatal("inet_connection=1 but ntk_restricted_mode=0. If you "
"want to be compatible with the Internet, "
"set the restricted mode in the options");
if (!server_opt.restricted && (server_opt.share_internet))
fatal("You want to share your Internet connection,"
"but I am not running in restricted mode (-r), "
"'cause I'm not sure of what you want... " "I'm aborting.");
if (server_opt.share_internet && me.my_bandwidth < MIN_CONN_BANDWIDTH)
fatal("You want to share your Internet connection but "
"your bandwidth is just TOO small. Do not share "
"it, or your connection will be saturated");
if (!server_opt.inet_connection && server_opt.share_internet) {
loginfo("You want to share your Internet connection,"
"but `internet_connection' is set to 0."
"We are assuming it is 1");
server_opt.inet_connection = 1;
}
if (server_opt.shape_internet && !server_opt.inet_connection)
fatal("The Internet traffic shaping option is set, but "
"the `internet_connection' is set to 0, please check "
"your options.");
#ifdef IPV6_DISABLED
if (server_opt.inet_gw.family == AF_INET6)
fatal("Ipv6 is not supported");
#endif
}
void
init_netsukuku(char **argv)
{
xsrand();
if (geteuid())
fatal("Need root privileges");
destroy_netsukuku_mutex = pid_saved = 0;
sigterm_timestamp = sighup_timestamp = sigalrm_timestamp = 0;
setzero(&me, sizeof(struct current_globals));
if (is_ntkd_already_running())
fatal("ntkd is already running. If it is not, remove \"%s\"",
server_opt.pid_file);
else
save_pid();
my_family = server_opt.family;
restricted_mode = server_opt.restricted;
restricted_class =
server_opt.restricted_class ? RESTRICTED_172 : RESTRICTED_10;
/* Check if the DATA_DIR exists, if not create it */
if (check_and_create_dir(DATA_DIR))
fatal("Cannot access to the %s directory. Exiting.", DATA_DIR);
/*
* Device initialization
*/
if (if_init_all(server_opt.ifs, server_opt.ifs_n,
me.cur_ifs, &me.cur_ifs_n) < 0)
fatal("Cannot initialize any network interfaces");
/*
* ANDNA init
*/
if (!server_opt.disable_andna)
andna_init();
/*
* Initialize the Internet gateway stuff
*/
if (server_opt.my_upload_bw && server_opt.my_dnload_bw)
me.my_bandwidth = bandwidth_in_8bit((server_opt.my_upload_bw +
server_opt.my_dnload_bw) / 2);
init_internet_gateway_search();
pkts_init(me.cur_ifs, me.cur_ifs_n, 0);
qspn_init(FAMILY_LVLS);
me.cur_erc = e_rnode_init(&me.cur_erc_counter);
/* Radar init */
rq_wait_idx_init(rq_wait_idx);
first_init_radar();
total_radars = 0;
ntk_load_maps();
#if 0
/* TODO: activate and test it !! */
debug(DBG_NORMAL, "ACPT: Initializing the accept_tbl: \n"
" max_connections: %d,\n"
" max_accepts_per_host: %d,\n"
" max_accept_per_host_time: %d",
server_opt.max_connections,
server_opt.max_accepts_per_host,
server_opt.max_accepts_per_host_time);
init_accept_tbl(server_opt.max_connections,
server_opt.max_accepts_per_host,
server_opt.max_accepts_per_host_time);
#endif
if (restricted_mode)
loginfo("NetsukukuD is in restricted mode. "
"Restricted class: %s",
server_opt.
restricted_class ? RESTRICTED_172_STR : RESTRICTED_10_STR);
hook_init();
rehook_init();
me.uptime = time(0);
}
int
destroy_netsukuku(void)
{
if (destroy_netsukuku_mutex)
return -1;
destroy_netsukuku_mutex = 1;
unlink(server_opt.pid_file);
ntk_save_maps();
ntk_free_maps();
if (!server_opt.disable_andna)
andna_close();
close_internet_gateway_search();
last_close_radar();
e_rnode_free(&me.cur_erc, &me.cur_erc_counter);
destroy_accept_tbl();
if_close_all();
qspn_free();
free_server_opt();
return 0;
}
void
sigterm_handler(int sig)
{
time_t cur_t;
if (sigterm_timestamp == (cur_t = time(0)))
return;
sigterm_timestamp = time(0);
if (!destroy_netsukuku())
fatal("Termination signal caught. Dying, bye, bye");
}
void *
reload_hostname_thread(void *null)
{
/*
* Reload the file where the hostnames to be registered are and
* register the new ones
*/
loginfo("Reloading the andna hostnames file");
load_hostnames(server_opt.andna_hnames_file, &andna_lcl, &lcl_counter);
load_snsd(server_opt.snsd_nodes_file, andna_lcl);
andna_update_hnames(1);
return 0;
}
void
sighup_handler(int sig)
{
pthread_t thread;
pthread_attr_t t_attr;
time_t cur_t;
if (sighup_timestamp == (cur_t = time(0)))
return;
sighup_timestamp = time(0);
pthread_attr_init(&t_attr);
pthread_attr_setdetachstate(&t_attr, PTHREAD_CREATE_DETACHED);
pthread_create(&thread, &t_attr, reload_hostname_thread, 0);
}
void *
rh_cache_flush_thread(void *null)
{
/*
* Flush the resolved hostnames cache.
*/
loginfo("Flush the resolved hostnames cache");
rh_cache_flush();
return 0;
}
void
sigalrm_handler(int sig)
{
pthread_t thread;
pthread_attr_t t_attr;
time_t cur_t;
if (sigalrm_timestamp == (cur_t = time(0)))
return;
sigalrm_timestamp = time(0);
pthread_attr_init(&t_attr);
pthread_attr_setdetachstate(&t_attr, PTHREAD_CREATE_DETACHED);
pthread_create(&thread, &t_attr, rh_cache_flush_thread, 0);
}
/*
* The main flow shall never be stopped, and the sand of time will be
* revealed.
*/
int
main(int argc, char **argv)
{
struct udp_daemon_argv ud_argv;
u_short *port;
pthread_t daemon_tcp_thread, daemon_udp_thread, andna_thread;
pthread_t ping_igw_thread;
pthread_attr_t t_attr;
log_init(argv[0], 0, 1);
/* Options loading... */
fill_default_options();
parse_options(argc, argv);
/* reinit the logs using the new `dbg_lvl' value */
log_init(argv[0], server_opt.dbg_lvl, 1);
log_to_file(0);
/* Load the option from the config file */
load_config_file(server_opt.config_file);
fill_loaded_cfg_options();
/* If a same option was specified in the config file and in the
* command line, give priority to the latter */
parse_options(argc, argv);
check_conflicting_options();
/* Initialize the whole netsukuku source code */
init_netsukuku(argv);
signal(SIGALRM, sigalrm_handler);
signal(SIGHUP, sighup_handler);
signal(SIGINT, sigterm_handler);
signal(SIGTERM, sigterm_handler);
signal(SIGQUIT, sigterm_handler);
/* Angelic foreground or Daemonic background ? */
if (server_opt.daemon) {
loginfo("Forking to background");
log_init(argv[0], server_opt.dbg_lvl, 0);
if (daemon(0, 0) == -1)
error("Impossible to daemonize: %s.", strerror(errno));
}
pthread_attr_init(&t_attr);
pthread_attr_setdetachstate(&t_attr, PTHREAD_CREATE_DETACHED);
setzero(&ud_argv, sizeof(struct udp_daemon_argv));
port = xmalloc(sizeof(u_short));
/*
* These are the daemons, the main threads that keeps NetsukukuD
* up & running.
*/
debug(DBG_NORMAL, "Activating all daemons");
pthread_mutex_init(&udp_daemon_lock, 0);
pthread_mutex_init(&tcp_daemon_lock, 0);
debug(DBG_SOFT, "Evoking the netsukuku udp radar daemon.");
ud_argv.port = ntk_udp_radar_port;
pthread_mutex_lock(&udp_daemon_lock);
pthread_create(&daemon_udp_thread, &t_attr, udp_daemon,
(void *) &ud_argv);
pthread_mutex_lock(&udp_daemon_lock);
pthread_mutex_unlock(&udp_daemon_lock);
debug(DBG_SOFT, "Evoking the netsukuku tcp daemon.");
*port = ntk_tcp_port;
pthread_mutex_lock(&tcp_daemon_lock);
pthread_create(&daemon_tcp_thread, &t_attr, tcp_daemon, (void *) port);
pthread_mutex_lock(&tcp_daemon_lock);
pthread_mutex_unlock(&tcp_daemon_lock);
/* Now we hook in Netsukuku */
netsukuku_hook(0, 0);
/*
* If not disabled, start the ANDNA daemon
*/
if (!server_opt.disable_andna)
pthread_create(&andna_thread, &t_attr, andna_main, 0);
xfree(port);
if (restricted_mode && (server_opt.share_internet ||
server_opt.use_shared_inet)) {
debug(DBG_SOFT, "Evoking the Internet Gateway Pinger daemon");
pthread_create(&ping_igw_thread, &t_attr, igw_monitor_igws_t, 0);
}
/* We use this same process for the radar_daemon. */
debug(DBG_SOFT, "Evoking radar daemon.");
radar_daemon(0);
/* Not reached, hahaha */
loginfo("Cya m8");
pthread_attr_destroy(&t_attr);
destroy_netsukuku();
exit(0);
}
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