2 tincctl.c -- Controlling a running tincd
3 Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <openssl/rand.h>
26 #include <openssl/rsa.h>
27 #include <openssl/pem.h>
28 #include <openssl/evp.h>
29 #include <openssl/engine.h>
35 #include "control_common.h"
37 /* The name this program was run with. */
38 char *program_name = NULL;
40 /* If nonzero, display usage information and exit. */
41 bool show_help = false;
43 /* If nonzero, print the version on standard output and exit. */
44 bool show_version = false;
46 /* If nonzero, it will attempt to kill a running tincd and exit. */
49 /* If nonzero, generate public/private keypair for this host/net. */
50 int generate_keys = 0;
52 static char *identname = NULL; /* program name for syslog */
53 static char *controlsocketname = NULL; /* pid file location */
55 char *confbase = NULL;
57 static struct option const long_options[] = {
58 {"config", required_argument, NULL, 'c'},
59 {"net", required_argument, NULL, 'n'},
60 {"help", no_argument, NULL, 1},
61 {"version", no_argument, NULL, 2},
62 {"controlsocket", required_argument, NULL, 5},
66 static void usage(bool status) {
68 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
71 printf(_("Usage: %s [options] command\n\n"), program_name);
72 printf(_("Valid options are:\n"
73 " -c, --config=DIR Read configuration options from DIR.\n"
74 " -n, --net=NETNAME Connect to net NETNAME.\n"
75 " --controlsocket=FILENAME Open control socket at FILENAME.\n"
76 " --help Display this help and exit.\n"
77 " --version Output version information and exit.\n"
79 "Valid commands are:\n"
80 " start Start tincd.\n"
82 " restart Restart tincd.\n"
83 " reload Reload configuration of running tincd.\n"
84 " pid Show PID of currently running tincd.\n"
85 " generate-keys [bits] Generate a new public/private keypair.\n"
86 " dump Dump a list of one of the following things:\n"
87 " nodes - all known nodes in the VPN\n"
88 " edges - all known connections in the VPN\n"
89 " subnets - all known subnets in the VPN\n"
90 " connections - all meta connections with ourself\n"
91 " graph - graph of the VPN in dotty format\n"
92 " purge Purge unreachable nodes\n"
94 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
98 static bool parse_options(int argc, char **argv) {
100 int option_index = 0;
102 while((r = getopt_long(argc, argv, "c:n:", long_options, &option_index)) != EOF) {
104 case 0: /* long option */
107 case 'c': /* config file */
108 confbase = xstrdup(optarg);
111 case 'n': /* net name given */
112 netname = xstrdup(optarg);
115 case 1: /* show help */
119 case 2: /* show version */
123 case 5: /* open control socket here */
124 controlsocketname = xstrdup(optarg);
139 FILE *ask_and_open(const char *filename, const char *what, const char *mode) {
146 /* Check stdin and stdout */
147 if(isatty(0) && isatty(1)) {
148 /* Ask for a file and/or directory name. */
149 fprintf(stdout, _("Please enter a file to save %s to [%s]: "),
153 if(fgets(buf, sizeof buf, stdin) < 0) {
154 fprintf(stderr, _("Error while reading stdin: %s\n"),
168 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
170 if(filename[0] != '/') {
172 /* The directory is a relative path or a filename. */
173 directory = get_current_dir_name();
174 snprintf(buf2, sizeof buf2, "%s/%s", directory, filename);
178 umask(0077); /* Disallow everything for group and other */
180 /* Open it first to keep the inode busy */
182 r = fopen(filename, mode);
185 fprintf(stderr, _("Error opening file `%s': %s\n"), filename, strerror(errno));
192 /* This function prettyprints the key generation process */
194 static void indicator(int a, int b, void *p) {
197 fprintf(stderr, ".");
201 fprintf(stderr, "+");
205 fprintf(stderr, "-");
211 fprintf(stderr, " p\n");
215 fprintf(stderr, " q\n");
219 fprintf(stderr, "?");
224 fprintf(stderr, "?");
229 Generate a public/private RSA keypair, and ask for a file to store
232 static bool keygen(int bits) {
238 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
239 rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
242 fprintf(stderr, _("Error during key generation!\n"));
245 fprintf(stderr, _("Done.\n"));
247 asprintf(&filename, "%s/rsa_key.priv", confbase);
248 f = ask_and_open(filename, _("private RSA key"), "a");
254 /* Make it unreadable for others. */
255 fchmod(fileno(f), 0600);
259 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
261 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
266 asprintf(&filename, "%s/hosts/%s", confbase, name);
268 asprintf(&filename, "%s/rsa_key.pub", confbase);
270 f = ask_and_open(filename, _("public RSA key"), "a");
276 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
278 PEM_write_RSAPublicKey(f, rsa_key);
286 Set all files and paths according to netname
288 static void make_names(void) {
291 char installdir[1024] = "";
292 long len = sizeof(installdir);
296 asprintf(&identname, "tinc.%s", netname);
298 identname = xstrdup("tinc");
301 if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
302 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
304 asprintf(&logfilename, "%s/log/%s.log", identname);
307 asprintf(&confbase, "%s/%s", installdir, netname);
309 asprintf(&confbase, "%s", installdir);
318 if(!controlsocketname)
319 asprintf(&controlsocketname, LOCALSTATEDIR "/run/%s.control", identname);
323 asprintf(&confbase, CONFDIR "/tinc/%s", netname);
325 fprintf(stderr, _("Both netname and configuration directory given, using the latter...\n"));
328 asprintf(&confbase, CONFDIR "/tinc");
332 static int fullread(int fd, void *data, size_t datalen) {
335 while (len < datalen) {
336 rv = read(fd, data + len, datalen - len);
337 if(rv == -1 && errno == EINTR)
353 static int send_ctl_request(int fd, enum request_type type,
354 void const *outdata, size_t outdatalen,
355 int *res_errno_p, void **indata_p,
356 size_t *indatalen_p) {
357 tinc_ctl_request_t req;
359 struct iovec vector[2] = {
361 {(void*) outdata, outdatalen}
365 if(res_errno_p == NULL)
368 memset(&req, 0, sizeof req);
369 req.length = sizeof req + outdatalen;
373 while((rv = writev(fd, vector, 2)) == -1 && errno == EINTR) ;
377 if(fullread(fd, &req, sizeof req) == -1)
380 if(req.length < sizeof req) {
385 if(req.length > sizeof req) {
386 if (indata_p == NULL) {
391 indata = xmalloc(req.length - sizeof req);
393 if(fullread(fd, indata, req.length - sizeof req) == -1) {
399 if(indatalen_p != NULL)
400 *indatalen_p = req.length - sizeof req;
403 *res_errno_p = req.res_errno;
409 Send a request (with printfs)
411 static int send_ctl_request_cooked(int fd, enum request_type type,
412 void const *outdata, size_t outdatalen)
418 if(send_ctl_request(fd, type, outdata, outdatalen, &res_errno,
419 (void**) &buf, &buflen)) {
420 fprintf(stderr, _("Error sending request: %s\n"), strerror(errno));
425 printf("%*s", buflen, buf);
430 fprintf(stderr, _("Server reported error: %s\n"), strerror(res_errno));
437 int main(int argc, char *argv[], char *envp[]) {
438 struct sockaddr_un addr;
441 tinc_ctl_greeting_t greeting;
442 tinc_ctl_request_t req;
444 program_name = argv[0];
446 setlocale(LC_ALL, "");
447 bindtextdomain(PACKAGE, LOCALEDIR);
450 if(!parse_options(argc, argv))
456 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
457 VERSION, __DATE__, __TIME__, PROT_CURRENT);
458 printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
459 "See the AUTHORS file for a complete list.\n\n"
460 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
461 "and you are welcome to redistribute it under certain conditions;\n"
462 "see the file COPYING for details.\n"));
473 fprintf(stderr, _("Not enough arguments.\n"));
478 // First handle commands that don't involve connecting to a running tinc daemon.
480 if(!strcasecmp(argv[optind], "generate-keys")) {
481 return !keygen(optind > argc ? atoi(argv[optind + 1]) : 1024);
484 if(!strcasecmp(argv[optind], "start")) {
486 execve("tincd", argv, envp);
487 fprintf(stderr, _("Could not start tincd: %s"), strerror(errno));
491 // Now handle commands that do involve connecting to a running tinc daemon.
493 if(strlen(controlsocketname) >= sizeof addr.sun_path) {
494 fprintf(stderr, _("Control socket filename too long!\n"));
498 fd = socket(PF_UNIX, SOCK_STREAM, 0);
500 fprintf(stderr, _("Cannot create UNIX socket: %s\n"), strerror(errno));
504 memset(&addr, 0, sizeof addr);
505 addr.sun_family = AF_UNIX;
506 strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
508 if(connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0) {
509 fprintf(stderr, _("Cannot connect to %s: %s\n"), controlsocketname, strerror(errno));
513 if(fullread(fd, &greeting, sizeof greeting) == -1) {
514 fprintf(stderr, _("Cannot read greeting from control socket: %s\n"),
519 if(greeting.version != TINC_CTL_VERSION_CURRENT) {
520 fprintf(stderr, _("Version mismatch: server %d, client %d\n"),
521 greeting.version, TINC_CTL_VERSION_CURRENT);
526 socklen_t credlen = sizeof cred;
528 if(getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cred, &credlen) < 0) {
529 fprintf(stderr, _("Could not obtain PID: %s\n"), strerror(errno));
533 if(!strcasecmp(argv[optind], "pid")) {
534 printf("%d\n", cred.pid);
538 if(!strcasecmp(argv[optind], "stop")) {
539 return send_ctl_request_cooked(fd, REQ_STOP, NULL, 0) != -1;
542 if(!strcasecmp(argv[optind], "reload")) {
543 return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
546 if(!strcasecmp(argv[optind], "restart")) {
547 return send_ctl_request_cooked(fd, REQ_RESTART, NULL, 0) != -1;
550 if(!strcasecmp(argv[optind], "dump")) {
551 if (argc < optind + 2) {
552 fprintf(stderr, _("Not enough arguments.\n"));
557 if(!strcasecmp(argv[optind+1], "nodes")) {
558 return send_ctl_request_cooked(fd, REQ_DUMP_NODES, NULL, 0) != -1;
561 if(!strcasecmp(argv[optind+1], "edges")) {
562 return send_ctl_request_cooked(fd, REQ_DUMP_EDGES, NULL, 0) != -1;
565 if(!strcasecmp(argv[optind+1], "subnets")) {
566 return send_ctl_request_cooked(fd, REQ_DUMP_SUBNETS, NULL, 0) != -1;
569 if(!strcasecmp(argv[optind+1], "connections")) {
570 return send_ctl_request_cooked(fd, REQ_DUMP_CONNECTIONS, NULL, 0) != -1;
573 if(!strcasecmp(argv[optind+1], "graph")) {
574 return send_ctl_request_cooked(fd, REQ_DUMP_GRAPH, NULL, 0) != -1;
577 fprintf(stderr, _("Unknown dump type '%s'.\n"), argv[optind+1]);
582 if(!strcasecmp(argv[optind], "purge")) {
583 return send_ctl_request_cooked(fd, REQ_PURGE, NULL, 0) != -1;
586 fprintf(stderr, _("Unknown command `%s'.\n"), argv[optind]);