/*
tincd.c -- the main file for tincd
- Copyright (C) 1998,99 Ivo Timmermans <zarq@iname.com>
+ Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
+ 2000-2002 Guus Sliepen <guus@sliepen.eu.org>
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
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-/*
- * $Log: tincd.c,v $
- * Revision 1.7 2000/04/27 13:47:51 zarq
- * Default config file name is tinc.conf, and pidfile is tinc.pid.
- *
- * Revision 1.6 2000/04/18 16:04:10 zarq
- * Address for bugreports changed to tinc@nl.linux.org.
- *
- * Revision 1.5 2000/04/17 16:23:29 zarq
- * Pass the requested size from xmalloc() and xrealloc() on to xalloc_fail_func()
- *
- * Revision 1.4 2000/04/06 18:28:29 zarq
- * New option -D, don't detach.
- *
- */
+ $Id: tincd.c,v 1.10.4.65 2002/09/15 14:55:54 guus Exp $
+*/
#include "config.h"
#include <errno.h>
-#include <fcntl.h>
+#include <fcntl.h>
#include <getopt.h>
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include <syslog.h>
#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <termios.h>
+
+/* Darwin (MacOS/X) needs the following definition... */
+#ifndef _P1003_1B_VISIBLE
+#define _P1003_1B_VISIBLE
+#endif
+
+#include <sys/mman.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"
+
+#include "system.h"
/* The name this program was run with. */
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;
-
-char *confbase = NULL; /* directory in which all config files are */
-char *configfilename = NULL; /* configuration file name */
-char *identname; /* program name for syslog */
-char *netname = NULL; /* name of the vpn network */
-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);
-
-static struct option const long_options[] =
-{
- { "kill", no_argument, NULL, 'k' },
- { "net", required_argument, NULL, 'n' },
- { "timeout", required_argument, NULL, 'p' },
- { "help", no_argument, &show_help, 1 },
- { "version", no_argument, &show_version, 1 },
- { "no-detach", no_argument, &do_detach, 0 },
- { NULL, 0, NULL, 0 }
+int kill_tincd = 0;
+
+/* If nonzero, generate public/private keypair for this host/net. */
+int generate_keys = 0;
+
+/* If nonzero, use null ciphers and skip all key exchanges. */
+int bypass_security = 0;
+
+/* If nonzero, disable swapping for this process. */
+int do_mlock = 0;
+
+char *identname; /* program name for syslog */
+char *pidfilename; /* pid file location */
+char **g_argv; /* a copy of the cmdline arguments */
+char **environment; /* A pointer to the environment on
+ startup */
+
+static struct option const long_options[] = {
+ {"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},
+ {"generate-keys", optional_argument, NULL, 'K'},
+ {"debug", optional_argument, NULL, 'd'},
+ {"bypass-security", no_argument, &bypass_security, 1},
+ {"mlock", no_argument, &do_mlock, 1},
+ {NULL, 0, NULL, 0}
};
-static void
-usage(int status)
+static void usage(int status)
{
- if(status != 0)
- fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
- else
- {
- printf("Usage: %s [option]...\n\n", program_name);
- printf(" -c, --config=FILE Read configuration options from FILE.\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"
- " -t, --timeout=TIMEOUT Seconds to wait before giving a timeout.\n");
- printf(" --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);
+ if(status != 0)
+ fprintf(stderr, _("Try `%s --help\' for more information.\n"),
+ program_name);
+ 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, --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"
+ " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
+ " -L, --mlock Lock tinc into main memory.\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);
}
-void
-parse_options(int argc, char **argv, char **envp)
+void parse_options(int argc, char **argv, char **envp)
{
- int r;
- int option_index = 0;
- config_t *p;
-
- while((r = getopt_long(argc, argv, "c:Ddkn:t:", long_options, &option_index)) != EOF)
- {
- switch(r)
- {
- case 0: /* long option */
- break;
- case 'c': /* config file */
- configfilename = xmalloc(strlen(optarg)+1);
- strcpy(configfilename, 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 't': /* timeout */
- if(!(p = add_config_val(&config, TYPE_INT, optarg)))
- {
- printf("Invalid timeout value `%s'.\n", optarg);
- usage(1);
- }
- break;
- case '?':
- usage(1);
- default:
- break;
- }
- }
+ int r;
+ int option_index = 0;
+
+ while((r = getopt_long(argc, argv, "c:DLd::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 'L': /* no detach */
+ do_mlock = 1;
+ 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 `%s'; BITS must be a number equal to or greater than 512.\n"),
+ optarg);
+ usage(1);
+ }
+
+ generate_keys &= ~7; /* Round it to bytes */
+ } else
+ generate_keys = 1024;
+ break;
+
+ case '?':
+ usage(1);
+
+ default:
+ break;
+ }
+ }
}
-void memory_full(int size)
+/* This function prettyprints the key generation process */
+
+void indicator(int a, int b, void *p)
{
- syslog(LOG_ERR, "Memory exhausted (last is %s:%d) (couldn't allocate %d bytes); exiting.", cp_file, cp_line, size);
- exit(1);
+ switch (a) {
+ case 0:
+ fprintf(stderr, ".");
+ break;
+
+ case 1:
+ fprintf(stderr, "+");
+ break;
+
+ case 2:
+ fprintf(stderr, "-");
+ break;
+
+ case 3:
+ switch (b) {
+ case 0:
+ fprintf(stderr, " p\n");
+ break;
+
+ case 1:
+ fprintf(stderr, " q\n");
+ break;
+
+ default:
+ fprintf(stderr, "?");
+ }
+ break;
+
+ default:
+ fprintf(stderr, "?");
+ }
}
/*
- Detach from current terminal, write pidfile, kill parent
+ Generate a public/private RSA keypair, and ask for a file to store
+ them in.
*/
-int detach(void)
+int keygen(int bits)
{
- int fd;
- pid_t pid;
+ RSA *rsa_key;
+ FILE *f;
+ char *name = NULL;
+ char *filename;
- if(do_detach)
- {
- ppid = getpid();
+ fprintf(stderr, _("Generating %d bits keys:\n"), bits);
+ rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
- 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;
-
- if(do_detach)
- {
- if((fd = open("/dev/tty", O_RDWR)) >= 0)
- {
- if(ioctl(fd, TIOCNOTTY, NULL))
- {
- perror("ioctl");
- return -1;
- }
- close(fd);
- }
+ if(!rsa_key) {
+ fprintf(stderr, _("Error during key generation!\n"));
+ return -1;
+ } else
+ fprintf(stderr, _("Done.\n"));
- if(setsid() < 0)
- return -1;
+ get_config_string(lookup_config(config_tree, "Name"), &name);
- kill(ppid, SIGTERM);
- }
-
- chdir("/"); /* avoid keeping a mointpoint busy */
+ if(name)
+ asprintf(&filename, "%s/hosts/%s", confbase, name);
+ else
+ asprintf(&filename, "%s/rsa_key.pub", confbase);
- openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON);
+ f = ask_and_safe_open(filename, _("public RSA key"), "a");
- if(debug_lvl > 1)
- syslog(LOG_NOTICE, "tincd %s (%s %s) starting, debug level %d.",
- VERSION, __DATE__, __TIME__, debug_lvl);
- else
- syslog(LOG_NOTICE, "tincd %s starting, debug level %d.", VERSION, debug_lvl);
+ if(!f)
+ return -1;
- xalloc_fail_func = memory_full;
+ 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);
-/*
- Close network connections, and terminate neatly
-*/
-void cleanup_and_exit(int c)
-{
- close_network_connections();
+ asprintf(&filename, "%s/rsa_key.priv", confbase);
+ f = ask_and_safe_open(filename, _("private RSA key"), "a");
- if(debug_lvl > 0)
- 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);
+ if(!f)
+ return -1;
- closelog();
- kill(ppid, SIGTERM);
- exit(c);
-}
+ if(ftell(f))
+ fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
-/*
- 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 it's locked, write-protected, or whatever */
- if(!write_pid(pidfilename))
- return 1;
-
- return 0;
-}
+ PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
+ fclose(f);
+ free(filename);
-/*
- kill older tincd for this net
-*/
-int kill_other(void)
-{
- int pid;
-
- 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;
- }
-
- 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);
-
- return 0;
+ return 0;
}
/*
*/
void make_names(void)
{
- if(!configfilename)
- {
- if(netname)
- {
- configfilename = xmalloc(strlen(netname)+18+strlen(CONFDIR));
- sprintf(configfilename, "%s/tinc/%s/tinc.conf", CONFDIR, netname);
+ if(netname) {
+ if(!pidfilename)
+ 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 = LOCALSTATEDIR "/run/tinc.pid";
+
+ if(!confbase)
+ asprintf(&confbase, "%s/tinc", CONFDIR);
+
+ if(!identname)
+ identname = "tinc";
}
- else
- {
- configfilename = xmalloc(17+strlen(CONFDIR));
- sprintf(configfilename, "%s/tinc/tinc.conf", CONFDIR);
- }
- }
-
- if(netname)
- {
- pidfilename = xmalloc(strlen(netname)+20);
- sprintf(pidfilename, "/var/run/tinc.%s.pid", netname);
- confbase = xmalloc(strlen(netname)+8+strlen(CONFDIR));
- sprintf(confbase, "%s/tinc/%s/", CONFDIR, netname);
- identname = xmalloc(strlen(netname)+7);
- sprintf(identname, "tinc.%s", netname);
- }
- else
- {
- pidfilename = "/var/run/tinc.pid";
- confbase = xmalloc(7+strlen(CONFDIR));
- sprintf(confbase, "%s/tinc/", CONFDIR);
- identname = "tinc";
- }
}
-int
-main(int argc, char **argv, char **envp)
+int main(int argc, char **argv, char **envp)
{
- program_name = argv[0];
-
- parse_options(argc, argv, envp);
-
- if(show_version)
- {
- printf("%s version %s\nCopyright (C) 1998,99 Ivo Timmermans 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\n", PACKAGE, VERSION);
- printf("This product includes software developed by Eric Young (eay@mincom.oz.au)\n");
+ program_name = argv[0];
- return 0;
- }
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
- if(show_help)
- usage(0);
+ environment = envp;
+ parse_options(argc, argv, envp);
- if(geteuid())
- {
- fprintf(stderr, "You must be root to run this program. sorry.\n");
- return 1;
- }
+ if(show_version) {
+ printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
+ VERSION, __DATE__, __TIME__, PROT_CURRENT);
+ 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"));
- g_argv = argv;
-
- make_names();
-
- if(kill_tincd)
- exit(kill_other());
-
- if(read_config_file(configfilename))
- return 1;
-
- setup_signals();
-
- if(detach())
- exit(0);
+ return 0;
+ }
- if(security_init())
- return 1;
+ if(show_help)
+ usage(0);
- if(setup_network_connections())
- cleanup_and_exit(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
- main_loop();
+ /* Lock all pages into memory if requested */
- cleanup_and_exit(1);
- return 1;
-}
-
-RETSIGTYPE
-sigterm_handler(int a)
-{
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, "Got TERM signal");
- cleanup_and_exit(0);
-}
+ if(do_mlock)
+#ifdef HAVE_MLOCKALL
+ if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
+ syslog(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
+ strerror(errno));
+#else
+ {
+ syslog(LOG_ERR, _("mlockall() not supported on this platform!"));
+#endif
+ return -1;
+ }
-RETSIGTYPE
-sigquit_handler(int a)
-{
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, "Got QUIT signal");
- cleanup_and_exit(0);
-}
+ g_argv = argv;
-RETSIGTYPE
-sigsegv_square(int a)
-{
- syslog(LOG_NOTICE, "Got another SEGV signal: not restarting");
- exit(0);
-}
+ make_names();
+ init_configuration(&config_tree);
-RETSIGTYPE
-sigsegv_handler(int a)
-{
- if(cp_file)
- syslog(LOG_NOTICE, "Got SEGV signal after %s line %d. Trying to re-execute.",
- cp_file, cp_line);
- else
- syslog(LOG_NOTICE, "Got SEGV signal; trying to re-execute.");
+ /* Slllluuuuuuurrrrp! */
- signal(SIGSEGV, sigsegv_square);
+ RAND_load_file("/dev/urandom", 1024);
- close_network_connections();
- remove_pid(pidfilename);
- execvp(g_argv[0], g_argv);
-}
+#ifdef HAVE_SSLEAY_ADD_ALL_ALGORITHMS
+ SSLeay_add_all_algorithms();
+#else
+ OpenSSL_add_all_algorithms();
+#endif
-RETSIGTYPE
-sighup_handler(int a)
-{
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, "Got HUP signal");
- close_network_connections();
- setup_network_connections();
- /* FIXME: read config-file and re-establish network connections */
-}
+ if(generate_keys) {
+ read_server_config();
+ exit(keygen(generate_keys));
+ }
-RETSIGTYPE
-sigint_handler(int a)
-{
- if(debug_lvl > 0)
- syslog(LOG_NOTICE, "Got INT signal");
- cleanup_and_exit(0);
-}
+ if(kill_tincd)
+ exit(kill_other(kill_tincd));
-RETSIGTYPE
-sigusr1_handler(int a)
-{
- dump_conn_list();
-}
+ if(read_server_config())
+ exit(1);
-RETSIGTYPE
-sigusr2_handler(int a)
-{
- if(debug_lvl > 1)
- syslog(LOG_NOTICE, "Forcing new keys");
- regenerate_keys();
-}
+ if(detach())
+ exit(0);
-RETSIGTYPE
-sighuh(int a)
-{
- if(cp_file)
- syslog(LOG_NOTICE, "Got unexpected signal (%d) after %s line %d.",
- a, cp_file, cp_line);
- else
- syslog(LOG_NOTICE, "Got unexpected signal (%d).", a);
-}
+ for(;;) {
+ if(!setup_network_connections()) {
+ main_loop();
+ cleanup_and_exit(1);
+ }
-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, parent_exit);
-}
+ syslog(LOG_ERR, _("Unrecoverable error"));
+ cp_trace();
-RETSIGTYPE parent_exit(int a)
-{
- exit(0);
+ if(do_detach) {
+ syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
+ sleep(maxtimeout);
+ } else {
+ syslog(LOG_ERR, _("Not restarting."));
+ exit(1);
+ }
+ }
}
-