X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincd.c;h=0b02aad4daef42e92bd62bee3a44f739b96f10d6;hp=0e0bc15883c522ba068736675c28c0447ac9538d;hb=5d1145f2c4b3b8261ca0aa0e89a2daf321640f0b;hpb=3831f51a53088bfcc1d148fd54b3083afe7fde32 diff --git a/src/tincd.c b/src/tincd.c index 0e0bc158..0b02aad4 100644 --- a/src/tincd.c +++ b/src/tincd.c @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: tincd.c,v 1.10.4.8 2000/08/17 16:51:08 guus Exp $ + $Id: tincd.c,v 1.10.4.30 2000/11/16 22:12:23 zarq Exp $ */ #include "config.h" @@ -30,20 +30,42 @@ #include #include #include +#include +#include +#include #ifdef HAVE_SYS_IOCTL_H # include #endif -#include +#ifdef HAVE_OPENSSL_RAND_H +# include +#else +# include +#endif + +#ifdef HAVE_OPENSSL_RSA_H +# include +#else +# include +#endif + +#ifdef HAVE_OPENSSL_ERR_H +# include +#else +# include +#endif + + + #include #include #include "conf.h" -#include "encr.h" #include "net.h" #include "netutl.h" #include "protocol.h" +#include "subnet.h" #include "system.h" @@ -60,32 +82,31 @@ static int show_version; static int kill_tincd = 0; /* If zero, don't detach from the terminal. */ -static int do_detach = 1; +extern int do_detach; + +/* If nonzero, generate public/private keypair for this host/net. */ +static int generate_keys = 0; -char *confbase = NULL; /* directory in which all config files are */ -/* char *configfilename = NULL; /* configuration file name, moved to config.c */ 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 */ +char **environment; /* A pointer to the environment on + startup */ 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[] = { + { "config", required_argument, NULL, 'c' }, { "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 }, + { "generate-keys", optional_argument, NULL, 'K'}, { NULL, 0, NULL, 0 } }; @@ -97,14 +118,14 @@ usage(int status) 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(_(" -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, --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); @@ -115,17 +136,16 @@ 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) + + while((r = getopt_long(argc, argv, "c:Ddkn:K::", long_options, &option_index)) != EOF) { switch(r) { case 0: /* long option */ break; case 'c': /* config file */ - configfilename = xmalloc(strlen(optarg)+1); - strcpy(configfilename, optarg); + confbase = xmalloc(strlen(optarg)+1); + strcpy(confbase, optarg); break; case 'D': /* no detach */ do_detach = 0; @@ -140,12 +160,19 @@ parse_options(int argc, char **argv, char **envp) 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); - } + 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")); + usage(1); + } + generate_keys &= ~7; /* Round it to bytes */ + } + else + generate_keys = 1024; break; case '?': usage(1); @@ -155,135 +182,60 @@ parse_options(int argc, char **argv, char **envp) } } -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); -} +/* This function prettyprints the key generation process */ -/* - Detach from current terminal, write pidfile, kill parent -*/ -int detach(void) +void indicator(int a, int b, void *p) { - 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; - - 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 > 0) - syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"), - VERSION, __DATE__, __TIME__, debug_lvl); - else - syslog(LOG_NOTICE, _("tincd %s starting"), VERSION, debug_lvl); - - xalloc_fail_func = memory_full; - - return 0; + 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, "?"); + } } -/* - Close network connections, and terminate neatly -*/ -void cleanup_and_exit(int c) -{ - close_network_connections(); - - 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); - - closelog(); - kill(ppid, SIGTERM); - exit(c); -} +/* Generate a public/private RSA keypair, and possibly store it into the configuration file. */ -/* - check for an existing tinc for this net, and write pid to pidfile -*/ -int write_pidfile(void) +int keygen(int bits) { - int pid; + RSA *rsa_key; - if((pid = check_pid(pidfilename))) + fprintf(stderr, _("Generating %d bits keys:\n"), bits); + rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL); + if(!rsa_key) { - 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; -} - -/* - 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); + fprintf(stderr, _("Error during key generation!")); + 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; } @@ -292,29 +244,25 @@ int kill_other(void) */ void make_names(void) { - if(!configfilename) - { - if(netname) - { - asprintf(&configfilename, "%s/tinc/%s/tinc.conf", CONFDIR, netname); - } - else - { - asprintf(&configfilename, "%s/tinc/tinc.conf", CONFDIR); - } - } - if(netname) { - asprintf(&pidfilename, "/var/run/tinc.%s.pid", netname); - asprintf(&confbase, "%s/tinc/%s/", CONFDIR, netname); - asprintf(&identname, "tinc.%s", netname); + if(!pidfilename) + asprintf(&pidfilename, "/var/run/tinc.%s.pid", netname); + if(!confbase) + asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname); + else + fprintf(stderr, _("Both netname and configuration directory given, using the latter...\n")); + if(!identname) + asprintf(&identname, "tinc.%s", netname); } else { - pidfilename = "/var/run/tinc.pid"; - asprintf(&confbase, "%s/tinc/", CONFDIR); - identname = "tinc"; + if(!pidfilename) + pidfilename = "/var/run/tinc.pid"; + if(!confbase) + asprintf(&confbase, "%s/tinc", CONFDIR); + if(!identname) + identname = "tinc"; } } @@ -327,17 +275,21 @@ main(int argc, char **argv, char **envp) 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 and others,\n" - "see the AUTHORS file for a complete list.\n\n" + 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\n")); - printf(_("This product includes software developed by Eric Young (eay@mincom.oz.au)\n")); + "see the file COPYING for details.\n")); return 0; } @@ -355,136 +307,46 @@ main(int argc, char **argv, char **envp) make_names(); + /* Slllluuuuuuurrrrp! */ + + RAND_load_file("/dev/urandom", 1024); + + if(generate_keys) + exit(keygen(generate_keys)); + if(kill_tincd) exit(kill_other()); - if(read_config_file(configfilename)) + if(read_server_config()) return 1; - setup_signals(); - if(detach()) exit(0); - if(security_init()) - return 1; - + if(debug_lvl >= DEBUG_ERROR) + ERR_load_crypto_strings(); + for(;;) { - setup_network_connections(); - - main_loop(); - - cleanup_and_exit(1); + if(!setup_network_connections()) + { + main_loop(); + cleanup_and_exit(1); + } + + syslog(LOG_ERR, _("Unrecoverable error")); + cp_trace(); - syslog(LOG_ERR, _("Unrecoverable error, restarting in %d seconds!"), MAXTIMEOUT); - sleep(MAXTIMEOUT); + if(do_detach) + { + syslog(LOG_NOTICE, _("Restarting in %d seconds!"), MAXTIMEOUT); + sleep(MAXTIMEOUT); + } + else + { + syslog(LOG_ERR, _("Not restarting.")); + exit(0); + } } } -RETSIGTYPE -sigterm_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got TERM signal")); - cleanup_and_exit(0); -} - -RETSIGTYPE -sigquit_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got QUIT signal")); - cleanup_and_exit(0); -} - -RETSIGTYPE -sigsegv_square(int a) -{ - syslog(LOG_NOTICE, _("Got another SEGV signal: not restarting")); - exit(0); -} - -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")); - - signal(SIGSEGV, sigsegv_square); - close_network_connections(); - remove_pid(pidfilename); - execvp(g_argv[0], g_argv); -} - -RETSIGTYPE -sighup_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got HUP signal, rereading configuration and restarting")); - sighup = 1; -} - -RETSIGTYPE -sigint_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got INT signal, exiting")); - cleanup_and_exit(0); -} - -RETSIGTYPE -sigusr1_handler(int a) -{ - dump_conn_list(); -} - -RETSIGTYPE -sigusr2_handler(int a) -{ - if(debug_lvl > 1) - syslog(LOG_NOTICE, _("Got USR2 signal, forcing new key generation")); - regenerate_keys(); -} - -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); -} - -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); -} - -RETSIGTYPE parent_exit(int a) -{ - exit(0); -}