/*
tincd.c -- the main file for tincd
- Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1998-2002 Ivo Timmermans <itimmermans@bigfoot.com>
+ 2000-2002 Guus Sliepen <guus@sliepen.warande.net>
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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: tincd.c,v 1.10.4.17 2000/10/29 00:02:20 guus Exp $
+ $Id: tincd.c,v 1.10.4.59 2002/06/08 12:57:10 guus Exp $
*/
#include "config.h"
#include <errno.h>
-#include <fcntl.h>
+#include <fcntl.h>
#include <getopt.h>
#include <signal.h>
#include <stdio.h>
#include <syslog.h>
#include <unistd.h>
#include <signal.h>
-#include <openssl/rand.h>
-#include <openssl/rsa.h>
#include <string.h>
+#include <termios.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
-#include <pidfile.h>
+#include <openssl/rand.h>
+#include <openssl/rsa.h>
+#include <openssl/pem.h>
+#include <openssl/evp.h>
+
#include <utils.h>
#include <xalloc.h>
#include "conf.h"
-#include "encr.h"
#include "net.h"
#include "netutl.h"
+#include "process.h"
#include "protocol.h"
#include "subnet.h"
char *program_name;
/* If nonzero, display usage information and exit. */
-static int show_help;
+int show_help;
/* If nonzero, print the version on standard output and exit. */
-static int show_version;
+int show_version;
/* If nonzero, it will attempt to kill a running tincd and exit. */
-static int kill_tincd = 0;
-
-/* If zero, don't detach from the terminal. */
-static int do_detach = 1;
+int kill_tincd = 0;
/* If nonzero, generate public/private keypair for this host/net. */
-static int generate_keys = 0;
+int generate_keys = 0;
+
+/* If nonzero, use null ciphers and skip all key exchanges. */
+int bypass_security = 0;
char *identname; /* program name for syslog */
char *pidfilename; /* pid file location */
-static pid_t ppid; /* pid of non-detached part */
char **g_argv; /* a copy of the cmdline arguments */
-
-void cleanup_and_exit(int);
-int detach(void);
-int kill_other(void);
-void make_names(void);
-RETSIGTYPE parent_exit(int a);
-void setup_signals(void);
-int write_pidfile(void);
+char **environment; /* A pointer to the environment on
+ startup */
static struct option const long_options[] =
{
- { "kill", no_argument, NULL, 'k' },
+ { "config", required_argument, NULL, 'c' },
+ { "kill", optional_argument, NULL, 'k' },
{ "net", required_argument, NULL, 'n' },
{ "help", no_argument, &show_help, 1 },
{ "version", no_argument, &show_version, 1 },
{ "no-detach", no_argument, &do_detach, 0 },
- { "keygen", optional_argument, NULL, 'K'},
+ { "generate-keys", optional_argument, NULL, 'K'},
+ { "debug", optional_argument, NULL, 'd'},
+ { "bypass-security", no_argument, &bypass_security, 1 },
{ NULL, 0, NULL, 0 }
};
else
{
printf(_("Usage: %s [option]...\n\n"), program_name);
- printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
- " -D, --no-detach Don't fork and detach.\n"
- " -d Increase debug level.\n"
- " -k, --kill Attempt to kill a running tincd and exit.\n"
- " -n, --net=NETNAME Connect to net NETNAME.\n"));
- printf(_(" -K, --keygen[=BITS] Generate public/private RSA keypair.\n"
- " --help Display this help and exit.\n"
- " --version Output version information and exit.\n\n"));
+ printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
+ " -D, --no-detach Don't fork and detach.\n"
+ " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
+ " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
+ " -n, --net=NETNAME Connect to net NETNAME.\n"));
+ printf(_(" -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
+ " --help Display this help and exit.\n"
+ " --version Output version information and exit.\n\n"));
printf(_("Report bugs to tinc@nl.linux.org.\n"));
}
exit(status);
{
int r;
int option_index = 0;
-
- while((r = getopt_long(argc, argv, "c:Ddkn:K::", long_options, &option_index)) != EOF)
+
+ while((r = getopt_long(argc, argv, "c:Dd::k::n:K::", long_options, &option_index)) != EOF)
{
switch(r)
{
case 0: /* long option */
break;
- case 'c': /* config file */
- confbase = xmalloc(strlen(optarg)+1);
- strcpy(confbase, optarg);
- break;
- case 'D': /* no detach */
- do_detach = 0;
- break;
- case 'd': /* inc debug level */
- debug_lvl++;
- break;
- case 'k': /* kill old tincds */
- kill_tincd = 1;
- break;
- case 'n': /* net name given */
- netname = xmalloc(strlen(optarg)+1);
- strcpy(netname, optarg);
- break;
- case 'K': /* generate public/private keypair */
+ case 'c': /* config file */
+ confbase = xmalloc(strlen(optarg)+1);
+ strcpy(confbase, optarg);
+ break;
+ case 'D': /* no detach */
+ do_detach = 0;
+ break;
+ case 'd': /* inc debug level */
+ if(optarg)
+ debug_lvl = atoi(optarg);
+ else
+ debug_lvl++;
+ break;
+ case 'k': /* kill old tincds */
+ if(optarg)
+ {
+ if(!strcasecmp(optarg, "HUP"))
+ kill_tincd = SIGHUP;
+ else if(!strcasecmp(optarg, "TERM"))
+ kill_tincd = SIGTERM;
+ else if(!strcasecmp(optarg, "KILL"))
+ kill_tincd = SIGKILL;
+ else if(!strcasecmp(optarg, "USR1"))
+ kill_tincd = SIGUSR1;
+ else if(!strcasecmp(optarg, "USR2"))
+ kill_tincd = SIGUSR2;
+ else if(!strcasecmp(optarg, "WINCH"))
+ kill_tincd = SIGWINCH;
+ else if(!strcasecmp(optarg, "INT"))
+ kill_tincd = SIGINT;
+ else if(!strcasecmp(optarg, "ALRM"))
+ kill_tincd = SIGALRM;
+ else
+ {
+ kill_tincd = atoi(optarg);
+ if(!kill_tincd)
+ {
+ fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"), optarg);
+ usage(1);
+ }
+ }
+ }
+ else
+ kill_tincd = SIGTERM;
+ break;
+ case 'n': /* net name given */
+ netname = xmalloc(strlen(optarg)+1);
+ strcpy(netname, optarg);
+ break;
+ case 'K': /* generate public/private keypair */
if(optarg)
{
generate_keys = atoi(optarg);
if(generate_keys < 512)
{
- fprintf(stderr, _("Invalid argument! BITS must be a number equal to or greater than 512.\n"));
+ fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
+ optarg);
usage(1);
}
- generate_keys &= ~7; /* Round it to bytes */
+ generate_keys &= ~7; /* Round it to bytes */
}
else
generate_keys = 1024;
- break;
+ break;
case '?':
usage(1);
default:
switch(b)
{
case 0:
- fprintf(stderr, " p\n");
+ fprintf(stderr, " p\n");
break;
case 1:
fprintf(stderr, " q\n");
}
}
-/* Generate a public/private RSA keypair, and possibly store it into the configuration file. */
-
+/*
+ Generate a public/private RSA keypair, and ask for a file to store
+ them in.
+*/
int keygen(int bits)
{
RSA *rsa_key;
-
- fprintf(stderr, _("Seeding the PRNG: please press some keys or move\nthe mouse if this program seems to have halted...\n"));
- RAND_load_file("/dev/random", 1024); /* OpenSSL PRNG state apparently uses 1024 bytes, but it seems pretty sufficient anyway :) */
+ FILE *f;
+ char *name = NULL;
+ char *filename;
fprintf(stderr, _("Generating %d bits keys:\n"), bits);
rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
+
if(!rsa_key)
{
- fprintf(stderr, _("Error during key generation!"));
+ fprintf(stderr, _("Error during key generation!\n"));
return -1;
- }
+ }
else
fprintf(stderr, _("Done.\n"));
- fprintf(stderr, _("Please copy the private key to tinc.conf and the\npublic key to your host configuration file:\n\n"));
- printf("PublicKey = %s\n", BN_bn2hex(rsa_key->n));
- printf("PrivateKey = %s\n", BN_bn2hex(rsa_key->d));
-
- fflush(stdin);
- return 0;
-}
-
-void memory_full(int size)
-{
- syslog(LOG_ERR, _("Memory exhausted (last is %s:%d) (couldn't allocate %d bytes), exiting."), cp_file, cp_line, size);
- exit(1);
-}
-
-/*
- Detach from current terminal, write pidfile, kill parent
-*/
-int detach(void)
-{
- int fd;
- pid_t pid;
-
- if(do_detach)
- {
- ppid = getpid();
-
- if((pid = fork()) < 0)
- {
- perror("fork");
- return -1;
- }
- if(pid) /* parent process */
- {
- signal(SIGTERM, parent_exit);
-// sleep(600); /* wait 10 minutes */
- exit(1);
- }
- }
-
- if(write_pidfile())
- return -1;
+ get_config_string(lookup_config(config_tree, "Name"), &name);
- if(do_detach)
- {
- if((fd = open("/dev/tty", O_RDWR)) >= 0)
- {
- if(ioctl(fd, TIOCNOTTY, NULL))
- {
- perror("ioctl");
- return -1;
- }
- close(fd);
- }
-
- if(setsid() < 0)
- return -1;
-
- kill(ppid, SIGTERM);
- }
-
- chdir("/"); /* avoid keeping a mointpoint busy */
-
- openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON);
-
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"),
- VERSION, __DATE__, __TIME__, debug_lvl);
+ if(name)
+ asprintf(&filename, "%s/hosts/%s", confbase, name);
else
- syslog(LOG_NOTICE, _("tincd %s starting"), VERSION);
-
- xalloc_fail_func = memory_full;
-
- return 0;
-}
+ asprintf(&filename, "%s/rsa_key.pub", confbase);
-/*
- Close network connections, and terminate neatly
-*/
-void cleanup_and_exit(int c)
-{
- close_network_connections();
-
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_INFO, _("Total bytes written: tap %d, socket %d; bytes read: tap %d, socket %d"),
- total_tap_out, total_socket_out, total_tap_in, total_socket_in);
-
- closelog();
- kill(ppid, SIGTERM);
- exit(c);
-}
-
-/*
- check for an existing tinc for this net, and write pid to pidfile
-*/
-int write_pidfile(void)
-{
- int pid;
-
- if((pid = check_pid(pidfilename)))
- {
- if(netname)
- fprintf(stderr, _("A tincd is already running for net `%s' with pid %d.\n"),
- netname, pid);
- else
- fprintf(stderr, _("A tincd is already running with pid %d.\n"), pid);
- return 1;
- }
+ if((f = ask_and_safe_open(filename, _("public RSA key"), "a")) == NULL)
+ return -1;
- /* if it's locked, write-protected, or whatever */
- if(!write_pid(pidfilename))
- return 1;
+ if(ftell(f))
+ fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
- return 0;
-}
+ PEM_write_RSAPublicKey(f, rsa_key);
+ fclose(f);
+ free(filename);
-/*
- kill older tincd for this net
-*/
-int kill_other(void)
-{
- int pid;
+ asprintf(&filename, "%s/rsa_key.priv", confbase);
+ if((f = ask_and_safe_open(filename, _("private RSA key"), "a")) == NULL)
+ return -1;
- if(!(pid = read_pid(pidfilename)))
- {
- if(netname)
- fprintf(stderr, _("No other tincd is running for net `%s'.\n"), netname);
- else
- fprintf(stderr, _("No other tincd is running.\n"));
- return 1;
- }
+ if(ftell(f))
+ fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
- errno = 0; /* No error, sometimes errno is only changed on error */
- /* ESRCH is returned when no process with that pid is found */
- if(kill(pid, SIGTERM) && errno == ESRCH)
- fprintf(stderr, _("Removing stale lock file.\n"));
- remove_pid(pidfilename);
+ PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
+ fclose(f);
+ free(filename);
return 0;
}
if(netname)
{
if(!pidfilename)
- asprintf(&pidfilename, "/var/run/tinc.%s.pid", netname);
+ asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname);
if(!confbase)
asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
+ else
+ syslog(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
if(!identname)
asprintf(&identname, "tinc.%s", netname);
}
else
{
if(!pidfilename)
- pidfilename = "/var/run/tinc.pid";
+ pidfilename = LOCALSTATEDIR "/run/tinc.pid";
if(!confbase)
asprintf(&confbase, "%s/tinc", CONFDIR);
if(!identname)
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
- /* Do some intl stuff right now */
-
- unknown = _("unknown");
-
+ environment = envp;
parse_options(argc, argv, envp);
if(show_version)
{
printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE, VERSION, __DATE__, __TIME__, PROT_CURRENT);
- printf(_("Copyright (C) 1998,1999,2000 Ivo Timmermans, Guus Sliepen and others.\n"
- "See the AUTHORS file for a complete list.\n\n"
- "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
- "and you are welcome to redistribute it under certain conditions;\n"
- "see the file COPYING for details.\n"));
+ printf(_("Copyright (C) 1998-2002 Ivo Timmermans, Guus Sliepen and others.\n"
+ "See the AUTHORS file for a complete list.\n\n"
+ "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
+ "and you are welcome to redistribute it under certain conditions;\n"
+ "see the file COPYING for details.\n"));
return 0;
}
if(show_help)
usage(0);
- if(geteuid())
- {
- fprintf(stderr, _("You must be root to run this program. Sorry.\n"));
- return 1;
- }
+#ifndef LOG_PERROR
+ openlog("tinc", LOG_CONS, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
+#else
+ openlog("tinc", LOG_PERROR, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
+#endif
g_argv = argv;
make_names();
+ init_configuration(&config_tree);
+ /* Slllluuuuuuurrrrp! */
+cp
+ RAND_load_file("/dev/urandom", 1024);
+
+#ifdef HAVE_SSLEAY_ADD_ALL_ALGORITHMS
+ SSLeay_add_all_algorithms();
+#else
+ OpenSSL_add_all_algorithms();
+#endif
+
+cp
if(generate_keys)
- exit(keygen(generate_keys));
+ {
+ read_server_config();
+ exit(keygen(generate_keys));
+ }
if(kill_tincd)
- exit(kill_other());
+ exit(kill_other(kill_tincd));
if(read_server_config())
- return 1;
-
- setup_signals();
-
+ exit(1);
+cp
if(detach())
exit(0);
-
-/* FIXME: wt* is this suppose to do?
- if(security_init())
- return 1;
-*/
+cp
for(;;)
{
if(!setup_network_connections())
{
main_loop();
cleanup_and_exit(1);
- }
-
+ }
+
syslog(LOG_ERR, _("Unrecoverable error"));
cp_trace();
if(do_detach)
{
- syslog(LOG_NOTICE, _("Restarting in %d seconds!"), MAXTIMEOUT);
- sleep(MAXTIMEOUT);
+ syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
+ sleep(maxtimeout);
}
else
{
- syslog(LOG_ERR, _("Aieee! Not restarting."));
- exit(0);
+ syslog(LOG_ERR, _("Not restarting."));
+ exit(1);
}
}
}
-
-RETSIGTYPE
-sigterm_handler(int a)
-{
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_NOTICE, _("Got TERM signal"));
- cleanup_and_exit(0);
-}
-
-RETSIGTYPE
-sigquit_handler(int a)
-{
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_NOTICE, _("Got QUIT signal"));
- cleanup_and_exit(0);
-}
-
-RETSIGTYPE
-sigsegv_square(int a)
-{
- syslog(LOG_ERR, _("Got another SEGV signal: not restarting"));
- exit(0);
-}
-
-RETSIGTYPE
-sigsegv_handler(int a)
-{
- syslog(LOG_ERR, _("Got SEGV signal"));
- cp_trace();
-
- if(do_detach)
- {
- syslog(LOG_NOTICE, _("Trying to re-execute in 5 seconds..."));
- signal(SIGSEGV, sigsegv_square);
- close_network_connections();
- sleep(5);
- remove_pid(pidfilename);
- execvp(g_argv[0], g_argv);
- }
- else
- {
- syslog(LOG_NOTICE, _("Aieee! Not restarting."));
- exit(0);
- }
-}
-
-RETSIGTYPE
-sighup_handler(int a)
-{
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_NOTICE, _("Got HUP signal, rereading configuration and restarting"));
- sighup = 1;
-}
-
-RETSIGTYPE
-sigint_handler(int a)
-{
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_NOTICE, _("Got INT signal, exiting"));
- cleanup_and_exit(0);
-}
-
-RETSIGTYPE
-sigusr1_handler(int a)
-{
- dump_conn_list();
-}
-
-RETSIGTYPE
-sigusr2_handler(int a)
-{
- dump_subnet_list();
-// if(debug_lvl > DEBUG_NOTHING)
-// syslog(LOG_NOTICE, _("Got USR2 signal, forcing new key generation"));
-/* FIXME: reprogram this.
- regenerate_keys();
-*/
-}
-
-RETSIGTYPE
-sighuh(int a)
-{
- syslog(LOG_WARNING, _("Got unexpected signal %d (%s)"), a, strsignal(a));
- cp_trace();
-}
-
-void
-setup_signals(void)
-{
- int i;
-
- for(i=0;i<32;i++)
- signal(i,sighuh);
-
- if(signal(SIGTERM, SIG_IGN) != SIG_ERR)
- signal(SIGTERM, sigterm_handler);
- if(signal(SIGQUIT, SIG_IGN) != SIG_ERR)
- signal(SIGQUIT, sigquit_handler);
- if(signal(SIGSEGV, SIG_IGN) != SIG_ERR)
- signal(SIGSEGV, sigsegv_handler);
- if(signal(SIGHUP, SIG_IGN) != SIG_ERR)
- signal(SIGHUP, sighup_handler);
- signal(SIGPIPE, SIG_IGN);
- if(signal(SIGINT, SIG_IGN) != SIG_ERR)
- signal(SIGINT, sigint_handler);
- signal(SIGUSR1, sigusr1_handler);
- signal(SIGUSR2, sigusr2_handler);
- signal(SIGCHLD, SIG_IGN);
-}
-
-RETSIGTYPE parent_exit(int a)
-{
- exit(0);
-}
projects / tinc / blobdiff