2 tincctl.c -- Controlling a running tincd
3 Copyright (C) 2007-2018 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 along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include "readline/readline.h"
26 #include "readline/history.h"
31 #include "control_common.h"
36 #include "invitation.h"
45 #define MSG_NOSIGNAL 0
48 static char **orig_argv;
51 /* If nonzero, display usage information and exit. */
52 static bool show_help = false;
54 /* If nonzero, print the version on standard output and exit. */
55 static bool show_version = false;
57 static char *name = NULL;
58 static char controlcookie[1025];
59 char *tinc_conf = NULL;
60 char *hosts_dir = NULL;
63 // Horrible global variables...
72 bool confbasegiven = false;
73 bool netnamegiven = false;
74 char *scriptinterpreter = NULL;
75 char *scriptextension = "";
81 static struct option const long_options[] = {
82 {"batch", no_argument, NULL, 'b'},
83 {"config", required_argument, NULL, 'c'},
84 {"net", required_argument, NULL, 'n'},
85 {"help", no_argument, NULL, 1},
86 {"version", no_argument, NULL, 2},
87 {"pidfile", required_argument, NULL, 3},
88 {"force", no_argument, NULL, 4},
92 static void version(void) {
93 printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
94 BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
95 printf("Copyright (C) 1998-2018 Ivo Timmermans, Guus Sliepen and others.\n"
96 "See the AUTHORS file for a complete list.\n\n"
97 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
98 "and you are welcome to redistribute it under certain conditions;\n"
99 "see the file COPYING for details.\n");
102 static void usage(bool status) {
104 fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
106 printf("Usage: %s [options] command\n\n", program_name);
107 printf("Valid options are:\n"
108 " -b, --batch Don't ask for anything (non-interactive mode).\n"
109 " -c, --config=DIR Read configuration options from DIR.\n"
110 " -n, --net=NETNAME Connect to net NETNAME.\n"
111 " --pidfile=FILENAME Read control cookie from FILENAME.\n"
112 " --force Force some commands to work despite warnings.\n"
113 " --help Display this help and exit.\n"
114 " --version Output version information and exit.\n"
116 "Valid commands are:\n"
117 " init [name] Create initial configuration files.\n"
118 " get VARIABLE Print current value of VARIABLE\n"
119 " set VARIABLE VALUE Set VARIABLE to VALUE\n"
120 " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
121 " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
122 " start [tincd options] Start tincd.\n"
123 " stop Stop tincd.\n"
124 " restart [tincd options] Restart tincd.\n"
125 " reload Partially reload configuration of running tincd.\n"
126 " pid Show PID of currently running tincd.\n"
127 #ifdef DISABLE_LEGACY
128 " generate-keys Generate a new Ed25519 public/private keypair.\n"
130 " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
131 " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
133 " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
134 " dump Dump a list of one of the following things:\n"
135 " [reachable] nodes - all known nodes in the VPN\n"
136 " edges - all known connections in the VPN\n"
137 " subnets - all known subnets in the VPN\n"
138 " connections - all meta connections with ourself\n"
139 " [di]graph - graph of the VPN in dotty format\n"
140 " invitations - outstanding invitations\n"
141 " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
142 " purge Purge unreachable nodes\n"
143 " debug N Set debug level\n"
144 " retry Retry all outgoing connections\n"
145 " disconnect NODE Close meta connection with NODE\n"
147 " top Show real-time statistics\n"
149 " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
150 " log [level] Dump log output [up to the specified level]\n"
151 " export Export host configuration of local node to standard output\n"
152 " export-all Export all host configuration files to standard output\n"
153 " import Import host configuration file(s) from standard input\n"
154 " exchange Same as export followed by import\n"
155 " exchange-all Same as export-all followed by import\n"
156 " invite NODE [...] Generate an invitation for NODE\n"
157 " join INVITATION Join a VPN using an INVITATION\n"
158 " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
159 " fsck Check the configuration files for problems.\n"
160 " sign [FILE] Generate a signed version of a file.\n"
161 " verify NODE [FILE] Verify that a file was signed by the given NODE.\n"
163 printf("Report bugs to tinc@tinc-vpn.org.\n");
167 static bool parse_options(int argc, char **argv) {
169 int option_index = 0;
171 while((r = getopt_long(argc, argv, "+bc:n:", long_options, &option_index)) != EOF) {
173 case 0: /* long option */
180 case 'c': /* config file */
181 confbase = xstrdup(optarg);
182 confbasegiven = true;
185 case 'n': /* net name given */
186 netname = xstrdup(optarg);
189 case 1: /* show help */
193 case 2: /* show version */
197 case 3: /* open control socket here */
198 pidfilename = xstrdup(optarg);
205 case '?': /* wrong options */
214 if(!netname && (netname = getenv("NETNAME"))) {
215 netname = xstrdup(netname);
218 /* netname "." is special: a "top-level name" */
220 if(netname && (!*netname || !strcmp(netname, "."))) {
225 if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
226 fprintf(stderr, "Invalid character in netname!\n");
233 /* Open a file with the desired permissions, minus the umask.
234 Also, if we want to create an executable file, we call fchmod()
235 to set the executable bits. */
237 FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
238 mode_t mask = umask(0);
241 FILE *f = fopen(filename, mode);
244 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
250 if((perms & 0444) && f) {
251 fchmod(fileno(f), perms);
259 static void disable_old_keys(const char *filename, const char *what) {
260 char tmpfile[PATH_MAX] = "";
262 bool disabled = false;
267 r = fopen(filename, "r");
273 snprintf(tmpfile, sizeof(tmpfile), "%s.tmp", filename);
275 struct stat st = {.st_mode = 0600};
276 fstat(fileno(r), &st);
277 w = fopenmask(tmpfile, "w", st.st_mode);
279 while(fgets(buf, sizeof(buf), r)) {
280 if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
281 if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
287 bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
294 if(block || ed25519pubkey) {
298 if(fputs(buf, w) < 0) {
304 if(block && !strncmp(buf, "-----END ", 9)) {
314 if(ferror(r) || fclose(r) < 0) {
320 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
330 // We cannot atomically replace files on Windows.
331 char bakfile[PATH_MAX] = "";
332 snprintf(bakfile, sizeof(bakfile), "%s.bak", filename);
334 if(rename(filename, bakfile) || rename(tmpfile, filename)) {
335 rename(bakfile, filename);
338 if(rename(tmpfile, filename)) {
340 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
345 fprintf(stderr, "Warning: old key(s) found and disabled.\n");
352 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
354 char directory[PATH_MAX] = ".";
358 /* Check stdin and stdout */
360 /* Ask for a file and/or directory name. */
361 fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
363 if(fgets(buf, sizeof(buf), stdin) == NULL) {
364 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
368 size_t len = strlen(buf);
381 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
384 if(filename[0] != '/') {
386 /* The directory is a relative path or a filename. */
387 getcwd(directory, sizeof(directory));
388 snprintf(buf2, sizeof(buf2), "%s" SLASH "%s", directory, filename);
392 disable_old_keys(filename, what);
394 /* Open it first to keep the inode busy */
396 r = fopenmask(filename, mode, perms);
399 fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
407 Generate a public/private Ed25519 keypair, and ask for a file to store
410 static bool ed25519_keygen(bool ask) {
413 char fname[PATH_MAX];
415 fprintf(stderr, "Generating Ed25519 keypair:\n");
417 if(!(key = ecdsa_generate())) {
418 fprintf(stderr, "Error during key generation!\n");
421 fprintf(stderr, "Done.\n");
424 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
425 f = ask_and_open(fname, "private Ed25519 key", "a", ask, 0600);
431 if(!ecdsa_write_pem_private_key(key, f)) {
432 fprintf(stderr, "Error writing private key!\n");
439 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
441 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.pub", confbase);
444 f = ask_and_open(fname, "public Ed25519 key", "a", ask, 0666);
450 char *pubkey = ecdsa_get_base64_public_key(key);
451 fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
469 #ifndef DISABLE_LEGACY
471 Generate a public/private RSA keypair, and ask for a file to store
474 static bool rsa_keygen(int bits, bool ask) {
477 char fname[PATH_MAX];
479 // Make sure the key size is a multiple of 8 bits.
482 // Make sure that a valid key size is used.
483 if(bits < 1024 || bits > 8192) {
484 fprintf(stderr, "Invalid key size %d specified! It should be between 1024 and 8192 bits.\n", bits);
486 } else if(bits < 2048) {
487 fprintf(stderr, "WARNING: generating a weak %d bits RSA key! 2048 or more bits are recommended.\n", bits);
490 fprintf(stderr, "Generating %d bits keys:\n", bits);
492 if(!(key = rsa_generate(bits, 0x10001))) {
493 fprintf(stderr, "Error during key generation!\n");
496 fprintf(stderr, "Done.\n");
499 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.priv", confbase);
500 f = ask_and_open(fname, "private RSA key", "a", ask, 0600);
506 if(!rsa_write_pem_private_key(key, f)) {
507 fprintf(stderr, "Error writing private key!\n");
514 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
516 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.pub", confbase);
519 f = ask_and_open(fname, "public RSA key", "a", ask, 0666);
525 if(!rsa_write_pem_public_key(key, f)) {
526 fprintf(stderr, "Error writing public key!\n");
549 bool recvline(int fd, char *line, size_t len) {
550 char *newline = NULL;
556 while(!(newline = memchr(buffer, '\n', blen))) {
557 int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
559 if(result == -1 && sockerrno == EINTR) {
561 } else if(result <= 0) {
568 if(newline - buffer >= len) {
572 len = newline - buffer;
574 memcpy(line, buffer, len);
576 memmove(buffer, newline + 1, blen - len - 1);
582 bool recvdata(int fd, char *data, size_t len) {
588 int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
590 if(result == -1 && sockerrno == EINTR) {
592 } else if(result <= 0) {
599 memcpy(data, buffer, len);
600 memmove(buffer, buffer + len, blen - len);
606 bool sendline(int fd, char *format, ...) {
607 static char buffer[4096];
612 va_start(ap, format);
613 blen = vsnprintf(buffer, sizeof(buffer), format, ap);
614 buffer[sizeof(buffer) - 1] = 0;
617 if(blen < 1 || blen >= sizeof(buffer)) {
625 int result = send(fd, p, blen, MSG_NOSIGNAL);
627 if(result == -1 && sockerrno == EINTR) {
629 } else if(result <= 0) {
640 static void pcap(int fd, FILE *out, int snaplen) {
641 sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
649 uint32_t tz_accuracy;
656 snaplen ? : sizeof(data),
669 fwrite(&header, sizeof(header), 1, out);
674 while(recvline(fd, line, sizeof(line))) {
676 int n = sscanf(line, "%d %d %d", &code, &req, &len);
677 gettimeofday(&tv, NULL);
679 if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof(data)) {
683 if(!recvdata(fd, data, len)) {
687 packet.tv_sec = tv.tv_sec;
688 packet.tv_usec = tv.tv_usec;
690 packet.origlen = len;
691 fwrite(&packet, sizeof(packet), 1, out);
692 fwrite(data, len, 1, out);
697 static void logcontrol(int fd, FILE *out, int level) {
698 sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
702 while(recvline(fd, line, sizeof(line))) {
704 int n = sscanf(line, "%d %d %d", &code, &req, &len);
706 if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof(data)) {
710 if(!recvdata(fd, data, len)) {
714 fwrite(data, len, 1, out);
721 static bool remove_service(void) {
722 SC_HANDLE manager = NULL;
723 SC_HANDLE service = NULL;
724 SERVICE_STATUS status = {0};
725 bool success = false;
727 manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
730 fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
734 service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
737 fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
741 if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
742 fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
744 fprintf(stderr, "%s service stopped\n", identname);
747 if(!DeleteService(service)) {
748 fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
757 CloseServiceHandle(service);
761 CloseServiceHandle(manager);
765 fprintf(stderr, "%s service removed\n", identname);
772 bool connect_tincd(bool verbose) {
777 struct timeval tv = {0, 0};
779 if(select(fd + 1, &r, NULL, NULL, &tv)) {
780 fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
788 FILE *f = fopen(pidfilename, "r");
792 fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
801 if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
803 fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
814 if((pid == 0) || (kill(pid, 0) && (errno == ESRCH))) {
815 fprintf(stderr, "Could not find tincd running at pid %d\n", pid);
816 /* clean up the stale socket and pid file */
818 unlink(unixsocketname);
822 struct sockaddr_un sa;
824 sa.sun_family = AF_UNIX;
826 strncpy(sa.sun_path, unixsocketname, sizeof(sa.sun_path));
828 fd = socket(AF_UNIX, SOCK_STREAM, 0);
832 fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
838 if(connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
840 fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
849 struct addrinfo hints = {
850 .ai_family = AF_UNSPEC,
851 .ai_socktype = SOCK_STREAM,
852 .ai_protocol = IPPROTO_TCP,
856 struct addrinfo *res = NULL;
858 if(getaddrinfo(host, port, &hints, &res) || !res) {
860 fprintf(stderr, "Cannot resolve %s port %s: %s\n", host, port, sockstrerror(sockerrno));
866 fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
870 fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
877 unsigned long arg = 0;
879 if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
881 fprintf(stderr, "System call `%s' failed: %s\n", "ioctlsocket", sockstrerror(sockerrno));
887 if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
889 fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
901 static const int one = 1;
902 setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof(one));
908 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %4095s %d", &code, data, &version) != 3 || code != 0) {
910 fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
918 sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
920 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
922 fprintf(stderr, "Could not fully establish control socket connection\n");
934 static int cmd_start(int argc, char *argv[]) {
935 if(connect_tincd(false)) {
937 fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
939 fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
946 char *slash = strrchr(program_name, '/');
950 if((c = strrchr(program_name, '\\')) > slash) {
957 xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
963 char **nargv = xzalloc((optind + argc) * sizeof(*nargv));
968 Windows has no real concept of an "argv array". A command line is just one string.
969 The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
970 it uses quotes to handle spaces in arguments.
971 Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
972 If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
973 into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
975 xasprintf(&arg0, "\"%s\"", arg0);
977 nargv[nargc++] = arg0;
979 for(int i = 1; i < optind; i++) {
980 nargv[nargc++] = orig_argv[i];
983 for(int i = 1; i < argc; i++) {
984 nargv[nargc++] = argv[i];
988 int status = spawnvp(_P_WAIT, c, nargv);
991 fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
997 int pfd[2] = {-1, -1};
999 if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
1000 fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
1008 fprintf(stderr, "Could not fork: %s\n", strerror(errno));
1016 snprintf(buf, sizeof(buf), "%d", pfd[1]);
1017 setenv("TINC_UMBILICAL", buf, true);
1018 exit(execvp(c, nargv));
1025 int status = -1, result;
1027 signal(SIGINT, SIG_IGN);
1030 // Pass all log messages from the umbilical to stderr.
1031 // A nul-byte right before closure means tincd started successfully.
1032 bool failure = true;
1036 while((len = read(pfd[0], buf, sizeof(buf))) > 0) {
1037 failure = buf[len - 1];
1052 // Make sure the child process is really gone.
1053 result = waitpid(pid, &status, 0);
1056 signal(SIGINT, SIG_DFL);
1059 if(failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
1060 fprintf(stderr, "Error starting %s\n", c);
1068 static int cmd_stop(int argc, char *argv[]) {
1070 fprintf(stderr, "Too many arguments!\n");
1076 if(!connect_tincd(true)) {
1078 if(kill(pid, SIGTERM)) {
1079 fprintf(stderr, "Could not send TERM signal to process with PID %d: %s\n", pid, strerror(errno));
1083 fprintf(stderr, "Sent TERM signal to process with PID %d.\n", pid);
1084 waitpid(pid, NULL, 0);
1091 sendline(fd, "%d %d", CONTROL, REQ_STOP);
1093 while(recvline(fd, line, sizeof(line))) {
1094 // Wait for tincd to close the connection...
1099 if(!remove_service()) {
1111 static int cmd_restart(int argc, char *argv[]) {
1113 return cmd_start(argc, argv);
1116 static int cmd_reload(int argc, char *argv[]) {
1118 fprintf(stderr, "Too many arguments!\n");
1122 if(!connect_tincd(true)) {
1126 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1128 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
1129 fprintf(stderr, "Could not reload configuration.\n");
1137 static int dump_invitations(void) {
1138 char dname[PATH_MAX];
1139 snprintf(dname, sizeof(dname), "%s" SLASH "invitations", confbase);
1140 DIR *dir = opendir(dname);
1143 if(errno == ENOENT) {
1144 fprintf(stderr, "No outstanding invitations.\n");
1148 fprintf(stderr, "Cannot not read directory %s: %s\n", dname, strerror(errno));
1156 while((ent = readdir(dir))) {
1157 char buf[MAX_STRING_SIZE];
1159 if(b64decode(ent->d_name, buf, 24) != 18) {
1163 char fname[PATH_MAX];
1164 snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ent->d_name);
1165 FILE *f = fopen(fname, "r");
1168 fprintf(stderr, "Cannot open %s: %s\n", fname, strerror(errno));
1174 if(!fgets(buf, sizeof(buf), f)) {
1175 fprintf(stderr, "Invalid invitation file %s\n", fname);
1182 char *eol = buf + strlen(buf);
1184 while(strchr("\t \r\n", *--eol)) {
1188 if(strncmp(buf, "Name = ", 7) || !check_id(buf + 7)) {
1189 fprintf(stderr, "Invalid invitation file %s\n", fname);
1194 printf("%s %s\n", ent->d_name, buf + 7);
1200 fprintf(stderr, "No outstanding invitations.\n");
1206 static int cmd_dump(int argc, char *argv[]) {
1207 bool only_reachable = false;
1209 if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
1210 if(strcasecmp(argv[2], "nodes")) {
1211 fprintf(stderr, "`reachable' only supported for nodes.\n");
1216 only_reachable = true;
1222 fprintf(stderr, "Invalid number of arguments.\n");
1227 if(!strcasecmp(argv[1], "invitations")) {
1228 return dump_invitations();
1231 if(!connect_tincd(true)) {
1237 if(!strcasecmp(argv[1], "nodes")) {
1238 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1239 } else if(!strcasecmp(argv[1], "edges")) {
1240 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1241 } else if(!strcasecmp(argv[1], "subnets")) {
1242 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
1243 } else if(!strcasecmp(argv[1], "connections")) {
1244 sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
1245 } else if(!strcasecmp(argv[1], "graph")) {
1246 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1247 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1249 } else if(!strcasecmp(argv[1], "digraph")) {
1250 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1251 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1254 fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
1260 printf("graph {\n");
1261 } else if(do_graph == 2) {
1262 printf("digraph {\n");
1265 while(recvline(fd, line, sizeof(line))) {
1266 char node1[4096], node2[4096];
1267 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, node1, node2);
1270 if(do_graph && req == REQ_DUMP_NODES) {
1292 char local_host[4096];
1293 char local_port[4096];
1296 int cipher, digest, maclength, compression, distance, socket, weight;
1297 short int pmtu, minmtu, maxmtu;
1298 unsigned int options, status_int;
1299 node_status_t status;
1300 long int last_state_change;
1301 long int udp_ping_rtt;
1304 case REQ_DUMP_NODES: {
1305 int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %d %d %d %d %x %x %4095s %4095s %d %hd %hd %hd %ld %ld", node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change, &udp_ping_rtt);
1308 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1312 memcpy(&status, &status_int, sizeof(status));
1315 const char *color = "black";
1317 if(!strcmp(host, "MYSELF")) {
1319 } else if(!status.reachable) {
1321 } else if(strcmp(via, node)) {
1323 } else if(!status.validkey) {
1325 } else if(minmtu > 0) {
1329 printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1331 if(only_reachable && !status.reachable) {
1335 printf("%s id %s at %s port %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %d (min %d max %d)",
1336 node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
1337 if (udp_ping_rtt != -1)
1338 printf(" rtt %ld.%03ld", udp_ping_rtt/1000, udp_ping_rtt%1000);
1344 case REQ_DUMP_EDGES: {
1345 int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %4095s port %4095s %x %d", from, to, host, port, local_host, local_port, &options, &weight);
1348 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1353 float w = 1 + 65536.0 / weight;
1355 if(do_graph == 1 && strcmp(node1, node2) > 0) {
1356 printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
1357 } else if(do_graph == 2) {
1358 printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
1361 printf("%s to %s at %s port %s local %s port %s options %x weight %d\n", from, to, host, port, local_host, local_port, options, weight);
1366 case REQ_DUMP_SUBNETS: {
1367 int n = sscanf(line, "%*d %*d %4095s %4095s", subnet, node);
1370 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1374 printf("%s owner %s\n", strip_weight(subnet), node);
1378 case REQ_DUMP_CONNECTIONS: {
1379 int n = sscanf(line, "%*d %*d %4095s %4095s port %4095s %x %d %x", node, host, port, &options, &socket, &status_int);
1382 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1386 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
1391 fprintf(stderr, "Unable to parse dump from tincd.\n");
1396 fprintf(stderr, "Error receiving dump.\n");
1400 static int cmd_purge(int argc, char *argv[]) {
1402 fprintf(stderr, "Too many arguments!\n");
1406 if(!connect_tincd(true)) {
1410 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1412 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1413 fprintf(stderr, "Could not purge old information.\n");
1420 static int cmd_debug(int argc, char *argv[]) {
1422 fprintf(stderr, "Invalid number of arguments.\n");
1426 if(!connect_tincd(true)) {
1430 int debuglevel = atoi(argv[1]);
1433 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1435 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1436 fprintf(stderr, "Could not set debug level.\n");
1440 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1444 static int cmd_retry(int argc, char *argv[]) {
1446 fprintf(stderr, "Too many arguments!\n");
1450 if(!connect_tincd(true)) {
1454 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1456 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1457 fprintf(stderr, "Could not retry outgoing connections.\n");
1464 static int cmd_connect(int argc, char *argv[]) {
1466 fprintf(stderr, "Invalid number of arguments.\n");
1470 if(!check_id(argv[1])) {
1471 fprintf(stderr, "Invalid name for node.\n");
1475 if(!connect_tincd(true)) {
1479 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1481 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1482 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1489 static int cmd_disconnect(int argc, char *argv[]) {
1491 fprintf(stderr, "Invalid number of arguments.\n");
1495 if(!check_id(argv[1])) {
1496 fprintf(stderr, "Invalid name for node.\n");
1500 if(!connect_tincd(true)) {
1504 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1506 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1507 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1514 static int cmd_top(int argc, char *argv[]) {
1516 fprintf(stderr, "Too many arguments!\n");
1522 if(!connect_tincd(true)) {
1529 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1534 static int cmd_pcap(int argc, char *argv[]) {
1536 fprintf(stderr, "Too many arguments!\n");
1540 if(!connect_tincd(true)) {
1544 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1549 static void sigint_handler(int sig) {
1550 fprintf(stderr, "\n");
1551 shutdown(fd, SHUT_RDWR);
1555 static int cmd_log(int argc, char *argv[]) {
1557 fprintf(stderr, "Too many arguments!\n");
1561 if(!connect_tincd(true)) {
1566 signal(SIGINT, sigint_handler);
1569 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1572 signal(SIGINT, SIG_DFL);
1580 static int cmd_pid(int argc, char *argv[]) {
1582 fprintf(stderr, "Too many arguments!\n");
1586 if(!connect_tincd(true) || !pid) {
1590 printf("%d\n", pid);
1594 int rstrip(char *value) {
1595 int len = strlen(value);
1597 while(len && strchr("\t\r\n ", value[len - 1])) {
1604 char *get_my_name(bool verbose) {
1605 FILE *f = fopen(tinc_conf, "r");
1609 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1618 while(fgets(buf, sizeof(buf), f)) {
1619 int len = strcspn(buf, "\t =");
1621 value += strspn(value, "\t ");
1625 value += strspn(value, "\t ");
1628 if(!rstrip(value)) {
1634 if(strcasecmp(buf, "Name")) {
1640 return replace_name(value);
1647 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1653 ecdsa_t *get_pubkey(FILE *f) {
1657 while(fgets(buf, sizeof(buf), f)) {
1658 int len = strcspn(buf, "\t =");
1660 value += strspn(value, "\t ");
1664 value += strspn(value, "\t ");
1667 if(!rstrip(value)) {
1673 if(strcasecmp(buf, "Ed25519PublicKey")) {
1678 return ecdsa_set_base64_public_key(value);
1685 const var_t variables[] = {
1686 /* Server configuration */
1687 {"AddressFamily", VAR_SERVER},
1688 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1689 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1690 {"BindToInterface", VAR_SERVER},
1691 {"Broadcast", VAR_SERVER | VAR_SAFE},
1692 {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1693 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1694 {"DecrementTTL", VAR_SERVER},
1695 {"Device", VAR_SERVER},
1696 {"DeviceStandby", VAR_SERVER},
1697 {"DeviceType", VAR_SERVER},
1698 {"DirectOnly", VAR_SERVER},
1699 {"Ed25519PrivateKeyFile", VAR_SERVER},
1700 {"ExperimentalProtocol", VAR_SERVER},
1701 {"Forwarding", VAR_SERVER},
1702 {"FWMark", VAR_SERVER},
1703 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1704 {"Hostnames", VAR_SERVER},
1705 {"IffOneQueue", VAR_SERVER},
1706 {"Interface", VAR_SERVER},
1707 {"InvitationExpire", VAR_SERVER},
1708 {"KeyExpire", VAR_SERVER},
1709 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1710 {"LocalDiscovery", VAR_SERVER},
1711 {"LogLevel", VAR_SERVER},
1712 {"MACExpire", VAR_SERVER},
1713 {"MaxConnectionBurst", VAR_SERVER},
1714 {"MaxOutputBufferSize", VAR_SERVER},
1715 {"MaxTimeout", VAR_SERVER},
1716 {"Mode", VAR_SERVER | VAR_SAFE},
1717 {"Name", VAR_SERVER},
1718 {"PingInterval", VAR_SERVER},
1719 {"PingTimeout", VAR_SERVER},
1720 {"PriorityInheritance", VAR_SERVER},
1721 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1722 {"PrivateKeyFile", VAR_SERVER},
1723 {"ProcessPriority", VAR_SERVER},
1724 {"Proxy", VAR_SERVER},
1725 {"ReplayWindow", VAR_SERVER},
1726 {"ScriptsExtension", VAR_SERVER},
1727 {"ScriptsInterpreter", VAR_SERVER},
1728 {"StrictSubnets", VAR_SERVER},
1729 {"TunnelServer", VAR_SERVER},
1730 {"UDPDiscovery", VAR_SERVER},
1731 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
1732 {"UDPDiscoveryInterval", VAR_SERVER},
1733 {"UDPDiscoveryTimeout", VAR_SERVER},
1734 {"MTUInfoInterval", VAR_SERVER},
1735 {"UDPInfoInterval", VAR_SERVER},
1736 {"UDPRcvBuf", VAR_SERVER},
1737 {"UDPSndBuf", VAR_SERVER},
1738 {"UPnP", VAR_SERVER},
1739 {"UPnPDiscoverWait", VAR_SERVER},
1740 {"UPnPRefreshPeriod", VAR_SERVER},
1741 {"VDEGroup", VAR_SERVER},
1742 {"VDEPort", VAR_SERVER},
1743 /* Host configuration */
1744 {"Address", VAR_HOST | VAR_MULTIPLE},
1745 {"Cipher", VAR_SERVER | VAR_HOST},
1746 {"ClampMSS", VAR_SERVER | VAR_HOST},
1747 {"Compression", VAR_SERVER | VAR_HOST},
1748 {"Digest", VAR_SERVER | VAR_HOST},
1749 {"Ed25519PublicKey", VAR_HOST},
1750 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1751 {"IndirectData", VAR_SERVER | VAR_HOST},
1752 {"MACLength", VAR_SERVER | VAR_HOST},
1753 {"PMTU", VAR_SERVER | VAR_HOST},
1754 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1756 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1757 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1758 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1759 {"TCPOnly", VAR_SERVER | VAR_HOST},
1760 {"Weight", VAR_HOST | VAR_SAFE},
1764 static int cmd_config(int argc, char *argv[]) {
1766 fprintf(stderr, "Invalid number of arguments.\n");
1770 if(strcasecmp(argv[0], "config")) {
1776 if(!strcasecmp(argv[1], "get")) {
1778 } else if(!strcasecmp(argv[1], "add")) {
1779 argv++, argc--, action = 1;
1780 } else if(!strcasecmp(argv[1], "del")) {
1781 argv++, argc--, action = -1;
1782 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1783 argv++, argc--, action = 0;
1787 fprintf(stderr, "Invalid number of arguments.\n");
1791 // Concatenate the rest of the command line
1792 strncpy(line, argv[1], sizeof(line) - 1);
1794 for(int i = 2; i < argc; i++) {
1795 strncat(line, " ", sizeof(line) - 1 - strlen(line));
1796 strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
1799 // Liberal parsing into node name, variable name and value.
1805 len = strcspn(line, "\t =");
1807 value += strspn(value, "\t ");
1811 value += strspn(value, "\t ");
1815 variable = strchr(line, '.');
1825 fprintf(stderr, "No variable given.\n");
1829 if(action >= 0 && !*value) {
1830 fprintf(stderr, "No value for variable given.\n");
1834 if(action < -1 && *value) {
1838 /* Some simple checks. */
1840 bool warnonremove = false;
1842 for(int i = 0; variables[i].name; i++) {
1843 if(strcasecmp(variables[i].name, variable)) {
1848 variable = (char *)variables[i].name;
1850 /* Discourage use of obsolete variables. */
1852 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1854 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1856 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1861 /* Don't put server variables in host config files */
1863 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1865 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1867 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1872 /* Should this go into our own host config file? */
1874 if(!node && !(variables[i].type & VAR_SERVER)) {
1875 node = get_my_name(true);
1882 /* Change "add" into "set" for variables that do not allow multiple occurrences.
1883 Turn on warnings when it seems variables might be removed unintentionally. */
1885 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1886 warnonremove = true;
1888 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1889 warnonremove = true;
1895 if(node && !check_id(node)) {
1896 fprintf(stderr, "Invalid name for node.\n");
1901 if(force || action < 0) {
1902 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1904 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1909 // Open the right configuration file.
1910 char filename[PATH_MAX];
1913 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
1915 snprintf(filename, sizeof(filename), "%s", tinc_conf);
1918 FILE *f = fopen(filename, "r");
1921 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1925 char tmpfile[PATH_MAX];
1929 snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename);
1930 tf = fopen(tmpfile, "w");
1933 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1939 // Copy the file, making modifications on the fly, unless we are just getting a value.
1943 bool removed = false;
1946 while(fgets(buf1, sizeof(buf1), f)) {
1947 buf1[sizeof(buf1) - 1] = 0;
1948 strncpy(buf2, buf1, sizeof(buf2));
1950 // Parse line in a simple way
1954 len = strcspn(buf2, "\t =");
1955 bvalue = buf2 + len;
1956 bvalue += strspn(bvalue, "\t ");
1958 if(*bvalue == '=') {
1960 bvalue += strspn(bvalue, "\t ");
1967 if(!strcasecmp(buf2, variable)) {
1971 printf("%s\n", bvalue);
1973 } else if(action == -1) {
1974 if(!*value || !strcasecmp(bvalue, value)) {
1980 } else if(action == 0) {
1981 // Warn if "set" was used for variables that can occur multiple times
1982 if(warnonremove && strcasecmp(bvalue, value)) {
1983 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1986 // Already set? Delete the rest...
1991 // Otherwise, replace.
1992 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1993 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2000 } else if(action > 0) {
2001 // Check if we've already seen this variable with the same value
2002 if(!strcasecmp(bvalue, value)) {
2009 // Copy original line...
2010 if(fputs(buf1, tf) < 0) {
2011 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2015 // Add newline if it is missing...
2016 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
2017 if(fputc('\n', tf) < 0) {
2018 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2025 // Make sure we read everything...
2026 if(ferror(f) || !feof(f)) {
2027 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
2032 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
2036 // Add new variable if necessary.
2037 if((action > 0 && !found) || (action == 0 && !set)) {
2038 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
2039 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2048 fprintf(stderr, "No matching configuration variables found.\n");
2053 // Make sure we wrote everything...
2055 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
2059 // Could we find what we had to remove?
2060 if(action < 0 && !removed) {
2062 fprintf(stderr, "No configuration variables deleted.\n");
2066 // Replace the configuration file with the new one
2069 if(remove(filename)) {
2070 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
2076 if(rename(tmpfile, filename)) {
2077 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
2081 // Silently try notifying a running tincd of changes.
2082 if(connect_tincd(false)) {
2083 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2089 static bool try_bind(int port) {
2090 struct addrinfo *ai = NULL, *aip;
2091 struct addrinfo hint = {
2092 .ai_flags = AI_PASSIVE,
2093 .ai_family = AF_UNSPEC,
2094 .ai_socktype = SOCK_STREAM,
2095 .ai_protocol = IPPROTO_TCP,
2098 bool success = true;
2100 snprintf(portstr, sizeof(portstr), "%d", port);
2102 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
2106 for(aip = ai; aip; aip = aip->ai_next) {
2107 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
2114 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
2127 int check_port(char *name) {
2132 fprintf(stderr, "Warning: could not bind to port 655. ");
2134 for(int i = 0; i < 100; i++) {
2135 int port = 0x1000 + (rand() & 0x7fff);
2137 if(try_bind(port)) {
2138 char filename[PATH_MAX];
2139 snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", confbase, name);
2140 FILE *f = fopen(filename, "a");
2143 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
2144 fprintf(stderr, "Please change tinc's Port manually.\n");
2148 fprintf(f, "Port = %d\n", port);
2150 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
2155 fprintf(stderr, "Please change tinc's Port manually.\n");
2159 static int cmd_init(int argc, char *argv[]) {
2160 if(!access(tinc_conf, F_OK)) {
2161 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
2166 fprintf(stderr, "Too many arguments!\n");
2168 } else if(argc < 2) {
2171 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
2173 if(!fgets(buf, sizeof(buf), stdin)) {
2174 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
2178 int len = rstrip(buf);
2181 fprintf(stderr, "No name given!\n");
2187 fprintf(stderr, "No Name given!\n");
2191 name = strdup(argv[1]);
2194 fprintf(stderr, "No Name given!\n");
2199 if(!check_id(name)) {
2200 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
2204 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
2205 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
2209 if(mkdir(confbase, 0777) && errno != EEXIST) {
2210 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
2214 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
2215 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
2219 FILE *f = fopen(tinc_conf, "w");
2222 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
2226 fprintf(f, "Name = %s\n", name);
2229 #ifndef DISABLE_LEGACY
2231 if(!rsa_keygen(2048, false)) {
2237 if(!ed25519_keygen(false)) {
2244 char filename[PATH_MAX];
2245 snprintf(filename, sizeof(filename), "%s" SLASH "tinc-up", confbase);
2247 if(access(filename, F_OK)) {
2248 FILE *f = fopenmask(filename, "w", 0777);
2251 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
2255 fprintf(f, "#!/bin/sh\n\necho 'Unconfigured tinc-up script, please edit '$0'!'\n\n#ifconfig $INTERFACE <your vpn IP address> netmask <netmask of whole VPN>\n");
2265 static int cmd_generate_keys(int argc, char *argv[]) {
2266 #ifdef DISABLE_LEGACY
2273 fprintf(stderr, "Too many arguments!\n");
2278 name = get_my_name(false);
2281 #ifndef DISABLE_LEGACY
2283 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
2289 if(!ed25519_keygen(true)) {
2296 #ifndef DISABLE_LEGACY
2297 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
2299 fprintf(stderr, "Too many arguments!\n");
2304 name = get_my_name(false);
2307 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
2311 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
2313 fprintf(stderr, "Too many arguments!\n");
2318 name = get_my_name(false);
2321 return !ed25519_keygen(true);
2324 static int cmd_help(int argc, char *argv[]) {
2329 static int cmd_version(int argc, char *argv[]) {
2331 fprintf(stderr, "Too many arguments!\n");
2339 static int cmd_info(int argc, char *argv[]) {
2341 fprintf(stderr, "Invalid number of arguments.\n");
2345 if(!connect_tincd(true)) {
2349 return info(fd, argv[1]);
2352 static const char *conffiles[] = {
2363 static int cmd_edit(int argc, char *argv[]) {
2365 fprintf(stderr, "Invalid number of arguments.\n");
2369 char filename[PATH_MAX] = "";
2371 if(strncmp(argv[1], "hosts" SLASH, 6)) {
2372 for(int i = 0; conffiles[i]; i++) {
2373 if(!strcmp(argv[1], conffiles[i])) {
2374 snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
2383 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
2384 char *dash = strchr(argv[1], '-');
2389 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
2390 fprintf(stderr, "Invalid configuration filename.\n");
2398 xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ? : getenv("EDITOR") ? : "vi", filename);
2400 xasprintf(&command, "edit \"%s\"", filename);
2402 int result = system(command);
2409 // Silently try notifying a running tincd of changes.
2410 if(connect_tincd(false)) {
2411 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2417 static int export(const char *name, FILE *out) {
2418 char filename[PATH_MAX];
2419 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2420 FILE *in = fopen(filename, "r");
2423 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
2427 fprintf(out, "Name = %s\n", name);
2430 while(fgets(buf, sizeof(buf), in)) {
2431 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
2437 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2446 static int cmd_export(int argc, char *argv[]) {
2448 fprintf(stderr, "Too many arguments!\n");
2452 char *name = get_my_name(true);
2458 int result = export(name, stdout);
2468 static int cmd_export_all(int argc, char *argv[]) {
2470 fprintf(stderr, "Too many arguments!\n");
2474 DIR *dir = opendir(hosts_dir);
2477 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2485 while((ent = readdir(dir))) {
2486 if(!check_id(ent->d_name)) {
2493 printf("#---------------------------------------------------------------#\n");
2496 result |= export(ent->d_name, stdout);
2508 static int cmd_import(int argc, char *argv[]) {
2510 fprintf(stderr, "Too many arguments!\n");
2519 char filename[PATH_MAX] = "";
2521 bool firstline = true;
2523 while(fgets(buf, sizeof(buf), in)) {
2524 if(sscanf(buf, "Name = %4095s", name) == 1) {
2527 if(!check_id(name)) {
2528 fprintf(stderr, "Invalid Name in input!\n");
2536 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2538 if(!force && !access(filename, F_OK)) {
2539 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2544 out = fopen(filename, "w");
2547 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2553 } else if(firstline) {
2554 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2559 if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
2564 if(fputs(buf, out) < 0) {
2565 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2576 fprintf(stderr, "Imported %d host configuration files.\n", count);
2579 fprintf(stderr, "No host configuration files imported.\n");
2584 static int cmd_exchange(int argc, char *argv[]) {
2585 return cmd_export(argc, argv) ? : cmd_import(argc, argv);
2588 static int cmd_exchange_all(int argc, char *argv[]) {
2589 return cmd_export_all(argc, argv) ? : cmd_import(argc, argv);
2592 static int switch_network(char *name) {
2593 if(strcmp(name, ".")) {
2594 if(!check_netname(name, false)) {
2595 fprintf(stderr, "Invalid character in netname!\n");
2599 if(!check_netname(name, true)) {
2600 fprintf(stderr, "Warning: unsafe character in netname!\n");
2610 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2617 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2618 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2619 xasprintf(&prompt, "%s> ", identname);
2624 static int cmd_network(int argc, char *argv[]) {
2626 fprintf(stderr, "Too many arguments!\n");
2631 return switch_network(argv[1]);
2634 DIR *dir = opendir(confdir);
2637 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2643 while((ent = readdir(dir))) {
2644 if(*ent->d_name == '.') {
2648 if(!strcmp(ent->d_name, "tinc.conf")) {
2653 char fname[PATH_MAX];
2654 snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
2656 if(!access(fname, R_OK)) {
2657 printf("%s\n", ent->d_name);
2666 static int cmd_fsck(int argc, char *argv[]) {
2668 fprintf(stderr, "Too many arguments!\n");
2672 return fsck(orig_argv[0]);
2675 static void *readfile(FILE *in, size_t *len) {
2677 size_t alloced = 4096;
2678 char *buf = xmalloc(alloced);
2681 size_t read = fread(buf + count, 1, alloced - count, in);
2689 if(count >= alloced) {
2691 buf = xrealloc(buf, alloced);
2702 static int cmd_sign(int argc, char *argv[]) {
2704 fprintf(stderr, "Too many arguments!\n");
2709 name = get_my_name(true);
2716 char fname[PATH_MAX];
2717 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
2718 FILE *fp = fopen(fname, "r");
2721 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2725 ecdsa_t *key = ecdsa_read_pem_private_key(fp);
2728 fprintf(stderr, "Could not read private key from %s\n", fname);
2738 in = fopen(argv[1], "rb");
2741 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
2750 char *data = readfile(in, &len);
2757 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2762 // Ensure we sign our name and current time as well
2763 long t = time(NULL);
2765 xasprintf(&trailer, " %s %ld", name, t);
2766 int trailer_len = strlen(trailer);
2768 data = xrealloc(data, len + trailer_len);
2769 memcpy(data + len, trailer, trailer_len);
2774 if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
2775 fprintf(stderr, "Error generating signature\n");
2781 b64encode(sig, sig, 64);
2784 fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
2785 fwrite(data, len, 1, stdout);
2791 static int cmd_verify(int argc, char *argv[]) {
2793 fprintf(stderr, "Not enough arguments!\n");
2798 fprintf(stderr, "Too many arguments!\n");
2802 char *node = argv[1];
2804 if(!strcmp(node, ".")) {
2806 name = get_my_name(true);
2814 } else if(!strcmp(node, "*")) {
2817 if(!check_id(node)) {
2818 fprintf(stderr, "Invalid node name\n");
2826 in = fopen(argv[2], "rb");
2829 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
2837 char *data = readfile(in, &len);
2844 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2848 char *newline = memchr(data, '\n', len);
2850 if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
2851 fprintf(stderr, "Invalid input\n");
2857 size_t skip = newline - data;
2859 char signer[MAX_STRING_SIZE] = "";
2860 char sig[MAX_STRING_SIZE] = "";
2863 if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
2864 fprintf(stderr, "Invalid input\n");
2869 if(node && strcmp(node, signer)) {
2870 fprintf(stderr, "Signature is not made by %s\n", node);
2880 xasprintf(&trailer, " %s %ld", signer, t);
2881 int trailer_len = strlen(trailer);
2883 data = xrealloc(data, len + trailer_len);
2884 memcpy(data + len, trailer, trailer_len);
2887 newline = data + skip;
2889 char fname[PATH_MAX];
2890 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
2891 FILE *fp = fopen(fname, "r");
2894 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2899 ecdsa_t *key = get_pubkey(fp);
2903 key = ecdsa_read_pem_public_key(fp);
2907 fprintf(stderr, "Could not read public key from %s\n", fname);
2915 if(b64decode(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
2916 fprintf(stderr, "Invalid signature\n");
2924 fwrite(newline, len - (newline - data), 1, stdout);
2930 static const struct {
2931 const char *command;
2932 int (*function)(int argc, char *argv[]);
2935 {"start", cmd_start},
2937 {"restart", cmd_restart},
2938 {"reload", cmd_reload},
2941 {"purge", cmd_purge},
2942 {"debug", cmd_debug},
2943 {"retry", cmd_retry},
2944 {"connect", cmd_connect},
2945 {"disconnect", cmd_disconnect},
2950 {"config", cmd_config, true},
2951 {"add", cmd_config},
2952 {"del", cmd_config},
2953 {"get", cmd_config},
2954 {"set", cmd_config},
2956 {"generate-keys", cmd_generate_keys},
2957 #ifndef DISABLE_LEGACY
2958 {"generate-rsa-keys", cmd_generate_rsa_keys},
2960 {"generate-ed25519-keys", cmd_generate_ed25519_keys},
2962 {"version", cmd_version},
2965 {"export", cmd_export},
2966 {"export-all", cmd_export_all},
2967 {"import", cmd_import},
2968 {"exchange", cmd_exchange},
2969 {"exchange-all", cmd_exchange_all},
2970 {"invite", cmd_invite},
2972 {"network", cmd_network},
2975 {"verify", cmd_verify},
2979 #ifdef HAVE_READLINE
2980 static char *complete_command(const char *text, int state) {
2989 while(commands[i].command) {
2990 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
2991 return xstrdup(commands[i].command);
3000 static char *complete_dump(const char *text, int state) {
3001 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
3011 if(!strncasecmp(matches[i], text, strlen(text))) {
3012 return xstrdup(matches[i]);
3021 static char *complete_config(const char *text, int state) {
3030 while(variables[i].name) {
3031 char *dot = strchr(text, '.');
3034 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
3036 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
3040 if(!strncasecmp(variables[i].name, text, strlen(text))) {
3041 return xstrdup(variables[i].name);
3051 static char *complete_info(const char *text, int state) {
3057 if(!connect_tincd(false)) {
3061 // Check the list of nodes
3062 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
3063 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
3066 while(recvline(fd, line, sizeof(line))) {
3068 int n = sscanf(line, "%d %d %4095s", &code, &req, item);
3081 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
3085 if(!strncmp(item, text, strlen(text))) {
3086 return xstrdup(strip_weight(item));
3093 static char *complete_nothing(const char *text, int state) {
3097 static char **completion(const char *text, int start, int end) {
3098 char **matches = NULL;
3101 matches = rl_completion_matches(text, complete_command);
3102 } else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
3103 matches = rl_completion_matches(text, complete_dump);
3104 } else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
3105 matches = rl_completion_matches(text, complete_config);
3106 } else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
3107 matches = rl_completion_matches(text, complete_config);
3108 } else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
3109 matches = rl_completion_matches(text, complete_config);
3110 } else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
3111 matches = rl_completion_matches(text, complete_config);
3112 } else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
3113 matches = rl_completion_matches(text, complete_info);
3120 static int cmd_shell(int argc, char *argv[]) {
3121 xasprintf(&prompt, "%s> ", identname);
3125 int maxargs = argc + 16;
3126 char **nargv = xmalloc(maxargs * sizeof(*nargv));
3128 for(int i = 0; i < argc; i++) {
3132 #ifdef HAVE_READLINE
3133 rl_readline_name = "tinc";
3134 rl_completion_entry_function = complete_nothing;
3135 rl_attempted_completion_function = completion;
3136 rl_filename_completion_desired = 0;
3141 #ifdef HAVE_READLINE
3146 rl_basic_word_break_characters = "\t\n ";
3147 line = readline(prompt);
3150 copy = xstrdup(line);
3153 line = fgets(buf, sizeof(buf), stdin);
3159 fputs(prompt, stdout);
3162 line = fgets(buf, sizeof(buf), stdin);
3169 /* Ignore comments */
3178 char *p = line + strspn(line, " \t\n");
3179 char *next = strtok(p, " \t\n");
3182 if(nargc >= maxargs) {
3184 nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
3189 next = strtok(NULL, " \t\n");
3196 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
3203 for(int i = 0; commands[i].command; i++) {
3204 if(!strcasecmp(nargv[argc], commands[i].command)) {
3205 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
3211 #ifdef HAVE_READLINE
3220 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
3235 int main(int argc, char *argv[]) {
3236 program_name = argv[0];
3239 tty = isatty(0) && isatty(1);
3241 if(!parse_options(argc, argv)) {
3246 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
3247 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
3260 static struct WSAData wsa_state;
3262 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
3263 fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
3272 if(optind >= argc) {
3273 return cmd_shell(argc, argv);
3276 for(int i = 0; commands[i].command; i++) {
3277 if(!strcasecmp(argv[optind], commands[i].command)) {
3278 return commands[i].function(argc - optind, argv + optind);
3282 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);