2 tincctl.c -- Controlling a running tincd
3 Copyright (C) 2007-2022 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"
47 #define MSG_NOSIGNAL 0
50 static char **orig_argv;
52 /* If nonzero, display usage information and exit. */
53 static bool show_help = false;
55 /* If nonzero, print the version on standard output and exit. */
56 static bool show_version = false;
58 static char *name = NULL;
59 static char controlcookie[1025];
60 char *tinc_conf = NULL;
61 char *hosts_dir = NULL;
64 // Horrible global variables...
73 bool confbasegiven = false;
74 char *scriptinterpreter = NULL;
75 static char defaultextension[] = "";
76 char *scriptextension = defaultextension;
82 static struct option const long_options[] = {
83 {"batch", no_argument, NULL, 'b'},
84 {"config", required_argument, NULL, 'c'},
85 {"net", required_argument, NULL, 'n'},
86 {"help", no_argument, NULL, 1},
87 {"version", no_argument, NULL, 2},
88 {"pidfile", required_argument, NULL, 3},
89 {"force", no_argument, NULL, 4},
93 static void version(void) {
94 static const char *message =
95 "%s version %s (built %s %s, protocol %d.%d)\n"
103 #ifndef DISABLE_LEGACY
107 "Copyright (C) 1998-2018 Ivo Timmermans, Guus Sliepen and others.\n"
108 "See the AUTHORS file for a complete list.\n"
110 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
111 "and you are welcome to redistribute it under certain conditions;\n"
112 "see the file COPYING for details.\n";
114 printf(message, PACKAGE, BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
117 static void usage(bool status) {
119 fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
121 static const char *message =
122 "Usage: %s [options] command\n"
124 "Valid options are:\n"
125 " -b, --batch Don't ask for anything (non-interactive mode).\n"
126 " -c, --config=DIR Read configuration options from DIR.\n"
127 " -n, --net=NETNAME Connect to net NETNAME.\n"
128 " --pidfile=FILENAME Read control cookie from FILENAME.\n"
129 " --force Force some commands to work despite warnings.\n"
130 " --help Display this help and exit.\n"
131 " --version Output version information and exit.\n"
133 "Valid commands are:\n"
134 " init [name] Create initial configuration files.\n"
135 " get VARIABLE Print current value of VARIABLE\n"
136 " set VARIABLE VALUE Set VARIABLE to VALUE\n"
137 " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
138 " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
139 " start [tincd options] Start tincd.\n"
140 " stop Stop tincd.\n"
141 " restart [tincd options] Restart tincd.\n"
142 " reload Partially reload configuration of running tincd.\n"
143 " pid Show PID of currently running tincd.\n"
144 #ifdef DISABLE_LEGACY
145 " generate-keys Generate a new Ed25519 public/private key pair.\n"
147 " generate-keys [bits] Generate new RSA and Ed25519 public/private key pairs.\n"
148 " generate-rsa-keys [bits] Generate a new RSA public/private key pair.\n"
150 " generate-ed25519-keys Generate a new Ed25519 public/private key pair.\n"
151 " dump Dump a list of one of the following things:\n"
152 " [reachable] nodes - all known nodes in the VPN\n"
153 " edges - all known connections in the VPN\n"
154 " subnets - all known subnets in the VPN\n"
155 " connections - all meta connections with ourself\n"
156 " [di]graph - graph of the VPN in dotty format\n"
157 " invitations - outstanding invitations\n"
158 " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
159 " purge Purge unreachable nodes\n"
160 " debug N Set debug level\n"
161 " retry Retry all outgoing connections\n"
162 " disconnect NODE Close meta connection with NODE\n"
164 " top Show real-time statistics\n"
166 " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
167 " log [level] Dump log output [up to the specified level]\n"
168 " export Export host configuration of local node to standard output\n"
169 " export-all Export all host configuration files to standard output\n"
170 " import Import host configuration file(s) from standard input\n"
171 " exchange Same as export followed by import\n"
172 " exchange-all Same as export-all followed by import\n"
173 " invite NODE [...] Generate an invitation for NODE\n"
174 " join INVITATION Join a VPN using an INVITATION\n"
175 " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
176 " fsck Check the configuration files for problems.\n"
177 " sign [FILE] Generate a signed version of a file.\n"
178 " verify NODE [FILE] Verify that a file was signed by the given NODE.\n"
180 "Report bugs to tinc@tinc-vpn.org.\n";
182 printf(message, program_name);
186 static bool parse_options(int argc, char **argv) {
188 int option_index = 0;
190 while((r = getopt_long(argc, argv, "+bc:n:", long_options, &option_index)) != EOF) {
192 case 0: /* long option */
199 case 'c': /* config file */
201 confbase = xstrdup(optarg);
202 confbasegiven = true;
205 case 'n': /* net name given */
207 netname = xstrdup(optarg);
210 case 1: /* show help */
214 case 2: /* show version */
218 case 3: /* open control socket here */
220 pidfilename = xstrdup(optarg);
227 case '?': /* wrong options */
237 if(!netname && (netname = getenv("NETNAME"))) {
238 netname = xstrdup(netname);
241 /* netname "." is special: a "top-level name" */
243 if(netname && (!*netname || !strcmp(netname, "."))) {
248 if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
249 fprintf(stderr, "Invalid character in netname!\n");
257 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
259 char directory[PATH_MAX] = ".";
265 /* Check stdin and stdout */
267 /* Ask for a file and/or directory name. */
268 fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
270 if(fgets(buf, sizeof(buf), stdin) == NULL) {
271 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
275 size_t len = strlen(buf);
288 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
291 if(filename[0] != '/') {
294 /* The directory is a relative path or a filename. */
295 if(!getcwd(directory, sizeof(directory))) {
296 fprintf(stderr, "Could not get current directory: %s\n", strerror(errno));
300 if((size_t)snprintf(buf2, sizeof(buf2), "%s" SLASH "%s", directory, filename) >= sizeof(buf2)) {
301 fprintf(stderr, "Filename too long: %s" SLASH "%s\n", directory, filename);
313 disable_old_keys(filename, what);
315 /* Open it first to keep the inode busy */
317 r = fopenmask(filename, mode, perms);
320 fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
328 Generate a public/private Ed25519 key pair, and ask for a file to store
331 static bool ed25519_keygen(bool ask) {
334 char fname[PATH_MAX];
336 fprintf(stderr, "Generating Ed25519 key pair:\n");
338 if(!(key = ecdsa_generate())) {
339 fprintf(stderr, "Error during key generation!\n");
342 fprintf(stderr, "Done.\n");
345 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
346 f = ask_and_open(fname, "private Ed25519 key", "a", ask, 0600);
352 if(!ecdsa_write_pem_private_key(key, f)) {
353 fprintf(stderr, "Error writing private key!\n");
360 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
362 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.pub", confbase);
365 f = ask_and_open(fname, "public Ed25519 key", "a", ask, 0666);
371 char *pubkey = ecdsa_get_base64_public_key(key);
372 fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
390 #ifndef DISABLE_LEGACY
392 Generate a public/private RSA key pair, and ask for a file to store
395 static bool rsa_keygen(int bits, bool ask) {
398 char fname[PATH_MAX];
400 // Make sure the key size is a multiple of 8 bits.
403 // Make sure that a valid key size is used.
404 if(bits < 1024 || bits > 8192) {
405 fprintf(stderr, "Invalid key size %d specified! It should be between 1024 and 8192 bits.\n", bits);
407 } else if(bits < 2048) {
408 fprintf(stderr, "WARNING: generating a weak %d bits RSA key! 2048 or more bits are recommended.\n", bits);
411 fprintf(stderr, "Generating %d bits keys:\n", bits);
413 if(!(key = rsa_generate(bits, 0x10001))) {
414 fprintf(stderr, "Error during key generation!\n");
417 fprintf(stderr, "Done.\n");
420 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.priv", confbase);
421 f = ask_and_open(fname, "private RSA key", "a", ask, 0600);
427 if(!rsa_write_pem_private_key(key, f)) {
428 fprintf(stderr, "Error writing private key!\n");
435 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
437 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.pub", confbase);
440 f = ask_and_open(fname, "public RSA key", "a", ask, 0666);
446 if(!rsa_write_pem_public_key(key, f)) {
447 fprintf(stderr, "Error writing public key!\n");
470 bool recvline(int fd, char *line, size_t len) {
471 char *newline = NULL;
477 while(!(newline = memchr(buffer, '\n', blen))) {
478 ssize_t nrecv = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
480 if(nrecv == -1 && sockerrno == EINTR) {
482 } else if(nrecv <= 0) {
489 if((size_t)(newline - buffer) >= len) {
493 len = newline - buffer;
495 memcpy(line, buffer, len);
497 memmove(buffer, newline + 1, blen - len - 1);
503 static bool recvdata(int fd, char *data, size_t len) {
505 ssize_t nrecv = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
507 if(nrecv == -1 && sockerrno == EINTR) {
509 } else if(nrecv <= 0) {
516 memcpy(data, buffer, len);
517 memmove(buffer, buffer + len, blen - len);
523 bool sendline(int fd, const char *format, ...) {
524 static char buffer[4096];
529 va_start(ap, format);
530 blen = vsnprintf(buffer, sizeof(buffer), format, ap);
531 buffer[sizeof(buffer) - 1] = 0;
534 if(blen < 1 || (size_t)blen >= sizeof(buffer)) {
542 ssize_t nsend = send(fd, p, blen, MSG_NOSIGNAL);
544 if(nsend == -1 && sockerrno == EINTR) {
546 } else if(nsend <= 0) {
557 static void pcap(int fd, FILE *out, uint32_t snaplen) {
558 sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
566 uint32_t tz_accuracy;
573 snaplen ? snaplen : sizeof(data),
586 fwrite(&header, sizeof(header), 1, out);
591 while(recvline(fd, line, sizeof(line))) {
594 int n = sscanf(line, "%d %d %lu", &code, &req, &len);
595 gettimeofday(&tv, NULL);
597 if(n != 3 || code != CONTROL || req != REQ_PCAP || len > sizeof(data)) {
601 if(!recvdata(fd, data, len)) {
605 packet.tv_sec = tv.tv_sec;
606 packet.tv_usec = tv.tv_usec;
608 packet.origlen = len;
609 fwrite(&packet, sizeof(packet), 1, out);
610 fwrite(data, len, 1, out);
615 static void logcontrol(int fd, FILE *out, int level) {
616 sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
620 while(recvline(fd, line, sizeof(line))) {
622 int n = sscanf(line, "%d %d %d", &code, &req, &len);
624 if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || (size_t)len > sizeof(data)) {
628 if(!recvdata(fd, data, len)) {
632 fwrite(data, len, 1, out);
638 static bool stop_tincd(void) {
639 if(!connect_tincd(true)) {
643 sendline(fd, "%d %d", CONTROL, REQ_STOP);
645 while(recvline(fd, line, sizeof(line))) {
646 // wait for tincd to close the connection...
657 static bool remove_service(void) {
658 SC_HANDLE manager = NULL;
659 SC_HANDLE service = NULL;
660 SERVICE_STATUS status = {0};
661 bool success = false;
663 manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
666 fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
670 service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
673 if(GetLastError() == ERROR_SERVICE_DOES_NOT_EXIST) {
674 success = stop_tincd();
676 fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
682 if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
683 fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
685 fprintf(stderr, "%s service stopped\n", identname);
688 if(!DeleteService(service)) {
689 fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
698 CloseServiceHandle(service);
702 CloseServiceHandle(manager);
706 fprintf(stderr, "%s service removed\n", identname);
713 bool connect_tincd(bool verbose) {
718 struct timeval tv = {0, 0};
720 if(select(fd + 1, &r, NULL, NULL, &tv)) {
721 fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
729 FILE *f = fopen(pidfilename, "r");
733 fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
742 if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
744 fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
755 if((pid == 0) || (kill(pid, 0) && (errno == ESRCH))) {
756 fprintf(stderr, "Could not find tincd running at pid %d\n", pid);
757 /* clean up the stale socket and pid file */
759 unlink(unixsocketname);
763 struct sockaddr_un sa = {
764 .sun_family = AF_UNIX,
767 if(strlen(unixsocketname) >= sizeof(sa.sun_path)) {
768 fprintf(stderr, "UNIX socket filename %s is too long!", unixsocketname);
772 strncpy(sa.sun_path, unixsocketname, sizeof(sa.sun_path));
774 fd = socket(AF_UNIX, SOCK_STREAM, 0);
778 fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
784 if(connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
786 fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
795 struct addrinfo hints = {
796 .ai_family = AF_UNSPEC,
797 .ai_socktype = SOCK_STREAM,
798 .ai_protocol = IPPROTO_TCP,
802 struct addrinfo *res = NULL;
804 if(getaddrinfo(host, port, &hints, &res) || !res) {
806 fprintf(stderr, "Cannot resolve %s port %s: %s\n", host, port, sockstrerror(sockerrno));
812 fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
816 fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
822 unsigned long arg = 0;
824 if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
826 fprintf(stderr, "System call `%s' failed: %s\n", "ioctlsocket", sockstrerror(sockerrno));
830 if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
832 fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
844 static const int one = 1;
845 setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof(one));
848 sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
853 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %4095s %d", &code, data, &version) != 3 || code != 0) {
855 fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
863 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
865 fprintf(stderr, "Could not fully establish control socket connection\n");
877 static int cmd_start(int argc, char *argv[]) {
878 if(connect_tincd(false)) {
880 fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
882 fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
889 char *slash = strrchr(program_name, '/');
893 if((c = strrchr(program_name, '\\')) > slash) {
900 xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
902 c = xstrdup("tincd");
906 char **nargv = xzalloc((optind + argc) * sizeof(*nargv));
911 Windows has no real concept of an "argv array". A command line is just one string.
912 The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
913 it uses quotes to handle spaces in arguments.
914 Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
915 If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
916 into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
918 xasprintf(&arg0, "\"%s\"", arg0);
920 nargv[nargc++] = arg0;
922 for(int i = 1; i < optind; i++) {
923 nargv[nargc++] = orig_argv[i];
926 for(int i = 1; i < argc; i++) {
927 nargv[nargc++] = argv[i];
931 int status = spawnvp(_P_WAIT, c, nargv);
937 fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
943 int pfd[2] = {-1, -1};
945 if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
946 fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
955 fprintf(stderr, "Could not fork: %s\n", strerror(errno));
964 snprintf(buf, sizeof(buf), "%d", pfd[1]);
965 setenv("TINC_UMBILICAL", buf, true);
966 exit(execvp(c, nargv));
974 signal(SIGINT, SIG_IGN);
977 // Pass all log messages from the umbilical to stderr.
978 // A nul-byte right before closure means tincd started successfully.
983 while((len = read(pfd[0], buf, sizeof(buf))) > 0) {
984 failure = buf[len - 1];
990 if(write(2, buf, len) != len) {
991 // Nothing we can do about it.
1001 // Make sure the child process is really gone.
1003 pid_t result = waitpid(pid, &status, 0);
1006 signal(SIGINT, SIG_DFL);
1009 bool failed = failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status);
1012 fprintf(stderr, "Error starting %s\n", c);
1017 return failed ? EXIT_FAILURE : EXIT_SUCCESS;
1021 static int cmd_stop(int argc, char *argv[]) {
1025 fprintf(stderr, "Too many arguments!\n");
1030 return remove_service() ? EXIT_SUCCESS : EXIT_FAILURE;
1035 if(kill(pid, SIGTERM)) {
1036 fprintf(stderr, "Could not send TERM signal to process with PID %d: %s\n", pid, strerror(errno));
1040 fprintf(stderr, "Sent TERM signal to process with PID %d.\n", pid);
1041 waitpid(pid, NULL, 0);
1052 static int cmd_restart(int argc, char *argv[]) {
1054 return cmd_start(argc, argv);
1057 static int cmd_reload(int argc, char *argv[]) {
1061 fprintf(stderr, "Too many arguments!\n");
1065 if(!connect_tincd(true)) {
1069 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1071 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
1072 fprintf(stderr, "Could not reload configuration.\n");
1080 static int dump_invitations(void) {
1081 char dname[PATH_MAX];
1082 snprintf(dname, sizeof(dname), "%s" SLASH "invitations", confbase);
1083 DIR *dir = opendir(dname);
1086 if(errno == ENOENT) {
1087 fprintf(stderr, "No outstanding invitations.\n");
1091 fprintf(stderr, "Cannot not read directory %s: %s\n", dname, strerror(errno));
1099 while((ent = readdir(dir))) {
1100 char buf[MAX_STRING_SIZE];
1102 if(b64decode_tinc(ent->d_name, buf, 24) != 18) {
1106 char fname[PATH_MAX];
1108 if((size_t)snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ent->d_name) >= sizeof(fname)) {
1109 fprintf(stderr, "Filename too long: %s" SLASH "%s\n", dname, ent->d_name);
1113 FILE *f = fopen(fname, "r");
1116 fprintf(stderr, "Cannot open %s: %s\n", fname, strerror(errno));
1122 if(!fgets(buf, sizeof(buf), f)) {
1123 fprintf(stderr, "Invalid invitation file %s\n", fname);
1130 char *eol = buf + strlen(buf);
1132 while(strchr("\t \r\n", *--eol)) {
1136 if(strncmp(buf, "Name = ", 7) || !check_id(buf + 7)) {
1137 fprintf(stderr, "Invalid invitation file %s\n", fname);
1142 printf("%s %s\n", ent->d_name, buf + 7);
1148 fprintf(stderr, "No outstanding invitations.\n");
1154 static int cmd_dump(int argc, char *argv[]) {
1155 bool only_reachable = false;
1157 if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
1158 if(strcasecmp(argv[2], "nodes")) {
1159 fprintf(stderr, "`reachable' only supported for nodes.\n");
1164 only_reachable = true;
1170 fprintf(stderr, "Invalid number of arguments.\n");
1175 if(!strcasecmp(argv[1], "invitations")) {
1176 return dump_invitations();
1179 if(!connect_tincd(true)) {
1185 if(!strcasecmp(argv[1], "nodes")) {
1186 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1187 } else if(!strcasecmp(argv[1], "edges")) {
1188 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1189 } else if(!strcasecmp(argv[1], "subnets")) {
1190 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
1191 } else if(!strcasecmp(argv[1], "connections")) {
1192 sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
1193 } else if(!strcasecmp(argv[1], "graph")) {
1194 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1195 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1197 } else if(!strcasecmp(argv[1], "digraph")) {
1198 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1199 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1202 fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
1208 printf("graph {\n");
1209 } else if(do_graph == 2) {
1210 printf("digraph {\n");
1213 while(recvline(fd, line, sizeof(line))) {
1214 char node1[4096], node2[4096];
1215 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, node1, node2);
1218 if(do_graph && req == REQ_DUMP_NODES) {
1240 char local_host[4096];
1241 char local_port[4096];
1244 int cipher, digest, maclength, compression, distance, socket, weight;
1245 short int pmtu, minmtu, maxmtu;
1246 unsigned int options;
1247 uint32_t status_int;
1248 node_status_t status;
1249 long int last_state_change;
1251 uint64_t in_packets, in_bytes, out_packets, out_bytes;
1254 case REQ_DUMP_NODES: {
1255 int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %d %d %d %d %x %"PRIx32" %4095s %4095s %d %hd %hd %hd %ld %d %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change, &udp_ping_rtt, &in_packets, &in_bytes, &out_packets, &out_bytes);
1258 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1262 memcpy(&status, &status_int, sizeof(status));
1265 const char *color = "black";
1267 if(!strcmp(host, "MYSELF")) {
1269 } else if(!status.reachable) {
1271 } else if(strcmp(via, node)) {
1273 } else if(!status.validkey) {
1275 } else if(minmtu > 0) {
1279 printf(" \"%s\" [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1281 if(only_reachable && !status.reachable) {
1285 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) rx %"PRIu64" %"PRIu64" tx %"PRIu64" %"PRIu64,
1286 node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu, in_packets, in_bytes, out_packets, out_bytes);
1288 if(udp_ping_rtt != -1) {
1289 printf(" rtt %d.%03d", udp_ping_rtt / 1000, udp_ping_rtt % 1000);
1297 case REQ_DUMP_EDGES: {
1298 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);
1301 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1306 float w = 1.0f + 65536.0f / (float)weight;
1308 if(do_graph == 1 && strcmp(node1, node2) > 0) {
1309 printf(" \"%s\" -- \"%s\" [w = %f, weight = %f];\n", node1, node2, w, w);
1310 } else if(do_graph == 2) {
1311 printf(" \"%s\" -> \"%s\" [w = %f, weight = %f];\n", node1, node2, w, w);
1314 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);
1319 case REQ_DUMP_SUBNETS: {
1320 int n = sscanf(line, "%*d %*d %4095s %4095s", subnet, node);
1323 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1327 printf("%s owner %s\n", strip_weight(subnet), node);
1331 case REQ_DUMP_CONNECTIONS: {
1332 int n = sscanf(line, "%*d %*d %4095s %4095s port %4095s %x %d %x", node, host, port, &options, &socket, &status_int);
1335 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1339 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
1344 fprintf(stderr, "Unable to parse dump from tincd.\n");
1349 fprintf(stderr, "Error receiving dump.\n");
1353 static int cmd_purge(int argc, char *argv[]) {
1357 fprintf(stderr, "Too many arguments!\n");
1361 if(!connect_tincd(true)) {
1365 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1367 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1368 fprintf(stderr, "Could not purge old information.\n");
1375 static int cmd_debug(int argc, char *argv[]) {
1377 fprintf(stderr, "Invalid number of arguments.\n");
1381 if(!connect_tincd(true)) {
1385 int debuglevel = atoi(argv[1]);
1388 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1390 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1391 fprintf(stderr, "Could not set debug level.\n");
1395 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1399 static int cmd_retry(int argc, char *argv[]) {
1403 fprintf(stderr, "Too many arguments!\n");
1407 if(!connect_tincd(true)) {
1411 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1413 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1414 fprintf(stderr, "Could not retry outgoing connections.\n");
1421 static int cmd_connect(int argc, char *argv[]) {
1423 fprintf(stderr, "Invalid number of arguments.\n");
1427 if(!check_id(argv[1])) {
1428 fprintf(stderr, "Invalid name for node.\n");
1432 if(!connect_tincd(true)) {
1436 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1438 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1439 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1446 static int cmd_disconnect(int argc, char *argv[]) {
1448 fprintf(stderr, "Invalid number of arguments.\n");
1452 if(!check_id(argv[1])) {
1453 fprintf(stderr, "Invalid name for node.\n");
1457 if(!connect_tincd(true)) {
1461 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1463 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1464 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1471 static int cmd_top(int argc, char *argv[]) {
1475 fprintf(stderr, "Too many arguments!\n");
1481 if(!connect_tincd(true)) {
1488 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1493 static int cmd_pcap(int argc, char *argv[]) {
1495 fprintf(stderr, "Too many arguments!\n");
1499 if(!connect_tincd(true)) {
1503 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1508 static void sigint_handler(int sig) {
1511 fprintf(stderr, "\n");
1512 shutdown(fd, SHUT_RDWR);
1516 static int cmd_log(int argc, char *argv[]) {
1518 fprintf(stderr, "Too many arguments!\n");
1522 if(!connect_tincd(true)) {
1527 signal(SIGINT, sigint_handler);
1530 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1533 signal(SIGINT, SIG_DFL);
1541 static int cmd_pid(int argc, char *argv[]) {
1545 fprintf(stderr, "Too many arguments!\n");
1549 if(!connect_tincd(true) || !pid) {
1553 printf("%d\n", pid);
1557 size_t rstrip(char *value) {
1558 size_t len = strlen(value);
1560 while(len && strchr("\t\r\n ", value[len - 1])) {
1567 char *get_my_name(bool verbose) {
1568 FILE *f = fopen(tinc_conf, "r");
1572 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1581 while(fgets(buf, sizeof(buf), f)) {
1582 size_t len = strcspn(buf, "\t =");
1584 value += strspn(value, "\t ");
1588 value += strspn(value, "\t ");
1591 if(!rstrip(value)) {
1597 if(strcasecmp(buf, "Name")) {
1603 return replace_name(value);
1610 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1616 ecdsa_t *get_pubkey(FILE *f) {
1620 while(fgets(buf, sizeof(buf), f)) {
1621 size_t len = strcspn(buf, "\t =");
1623 value += strspn(value, "\t ");
1627 value += strspn(value, "\t ");
1630 if(!rstrip(value)) {
1636 if(strcasecmp(buf, "Ed25519PublicKey")) {
1641 return ecdsa_set_base64_public_key(value);
1648 const var_t variables[] = {
1649 /* Server configuration */
1650 {"AddressFamily", VAR_SERVER | VAR_SAFE},
1651 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1652 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1653 {"BindToInterface", VAR_SERVER},
1654 {"Broadcast", VAR_SERVER | VAR_SAFE},
1655 {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1656 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1657 {"DecrementTTL", VAR_SERVER | VAR_SAFE},
1658 {"Device", VAR_SERVER},
1659 {"DeviceStandby", VAR_SERVER},
1660 {"DeviceType", VAR_SERVER},
1661 {"DirectOnly", VAR_SERVER | VAR_SAFE},
1662 {"Ed25519PrivateKeyFile", VAR_SERVER},
1663 {"ExperimentalProtocol", VAR_SERVER},
1664 {"Forwarding", VAR_SERVER},
1665 {"FWMark", VAR_SERVER},
1666 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1667 {"Hostnames", VAR_SERVER},
1668 {"IffOneQueue", VAR_SERVER},
1669 {"Interface", VAR_SERVER},
1670 {"InvitationExpire", VAR_SERVER},
1671 {"KeyExpire", VAR_SERVER | VAR_SAFE},
1672 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1673 {"LocalDiscovery", VAR_SERVER | VAR_SAFE},
1674 {"LogLevel", VAR_SERVER},
1675 {"MACExpire", VAR_SERVER | VAR_SAFE},
1676 {"MaxConnectionBurst", VAR_SERVER | VAR_SAFE},
1677 {"MaxOutputBufferSize", VAR_SERVER | VAR_SAFE},
1678 {"MaxTimeout", VAR_SERVER | VAR_SAFE},
1679 {"Mode", VAR_SERVER | VAR_SAFE},
1680 {"Name", VAR_SERVER},
1681 {"PingInterval", VAR_SERVER | VAR_SAFE},
1682 {"PingTimeout", VAR_SERVER | VAR_SAFE},
1683 {"PriorityInheritance", VAR_SERVER},
1684 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1685 {"PrivateKeyFile", VAR_SERVER},
1686 {"ProcessPriority", VAR_SERVER},
1687 {"Proxy", VAR_SERVER},
1688 {"ReplayWindow", VAR_SERVER | VAR_SAFE},
1689 {"ScriptsExtension", VAR_SERVER},
1690 {"ScriptsInterpreter", VAR_SERVER},
1691 {"StrictSubnets", VAR_SERVER | VAR_SAFE},
1692 {"TunnelServer", VAR_SERVER | VAR_SAFE},
1693 {"UDPDiscovery", VAR_SERVER | VAR_SAFE},
1694 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER | VAR_SAFE},
1695 {"UDPDiscoveryInterval", VAR_SERVER | VAR_SAFE},
1696 {"UDPDiscoveryTimeout", VAR_SERVER | VAR_SAFE},
1697 {"MTUInfoInterval", VAR_SERVER | VAR_SAFE},
1698 {"UDPInfoInterval", VAR_SERVER | VAR_SAFE},
1699 {"UDPRcvBuf", VAR_SERVER},
1700 {"UDPSndBuf", VAR_SERVER},
1701 {"UPnP", VAR_SERVER},
1702 {"UPnPDiscoverWait", VAR_SERVER},
1703 {"UPnPRefreshPeriod", VAR_SERVER},
1704 {"VDEGroup", VAR_SERVER},
1705 {"VDEPort", VAR_SERVER},
1706 /* Host configuration */
1707 {"Address", VAR_HOST | VAR_MULTIPLE},
1708 {"Cipher", VAR_SERVER | VAR_HOST},
1709 {"ClampMSS", VAR_SERVER | VAR_HOST | VAR_SAFE},
1710 {"Compression", VAR_SERVER | VAR_HOST | VAR_SAFE},
1711 {"Digest", VAR_SERVER | VAR_HOST},
1712 {"Ed25519PublicKey", VAR_HOST},
1713 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1714 {"IndirectData", VAR_SERVER | VAR_HOST | VAR_SAFE},
1715 {"MACLength", VAR_SERVER | VAR_HOST},
1716 {"PMTU", VAR_SERVER | VAR_HOST},
1717 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1719 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1720 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1721 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1722 {"TCPOnly", VAR_SERVER | VAR_HOST | VAR_SAFE},
1723 {"Weight", VAR_HOST | VAR_SAFE},
1727 static int cmd_config(int argc, char *argv[]) {
1729 fprintf(stderr, "Invalid number of arguments.\n");
1733 if(strcasecmp(argv[0], "config")) {
1739 if(!strcasecmp(argv[1], "get")) {
1741 } else if(!strcasecmp(argv[1], "add")) {
1742 argv++, argc--, action = 1;
1743 } else if(!strcasecmp(argv[1], "del")) {
1744 argv++, argc--, action = -1;
1745 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1746 argv++, argc--, action = 0;
1750 fprintf(stderr, "Invalid number of arguments.\n");
1754 // Concatenate the rest of the command line
1755 strncpy(line, argv[1], sizeof(line) - 1);
1757 for(int i = 2; i < argc; i++) {
1758 strncat(line, " ", sizeof(line) - 1 - strlen(line));
1759 strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
1762 // Liberal parsing into node name, variable name and value.
1768 len = strcspn(line, "\t =");
1770 value += strspn(value, "\t ");
1774 value += strspn(value, "\t ");
1778 variable = strchr(line, '.');
1788 fprintf(stderr, "No variable given.\n");
1792 if(action >= 0 && !*value) {
1793 fprintf(stderr, "No value for variable given.\n");
1797 if(action < -1 && *value) {
1801 /* Some simple checks. */
1803 bool warnonremove = false;
1805 for(int i = 0; variables[i].name; i++) {
1806 if(strcasecmp(variables[i].name, variable)) {
1811 variable = (char *)variables[i].name;
1813 if(!strcasecmp(variable, "Subnet") && *value) {
1816 if(!str2net(&s, value)) {
1817 fprintf(stderr, "Malformed subnet definition %s\n", value);
1821 if(!subnetcheck(s)) {
1822 fprintf(stderr, "Network address and prefix length do not match: %s\n", value);
1827 /* Discourage use of obsolete variables. */
1829 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1831 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1833 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1838 /* Don't put server variables in host config files */
1840 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1842 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1844 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1849 /* Should this go into our own host config file? */
1851 if(!node && !(variables[i].type & VAR_SERVER)) {
1852 node = get_my_name(true);
1859 /* Change "add" into "set" for variables that do not allow multiple occurrences.
1860 Turn on warnings when it seems variables might be removed unintentionally. */
1862 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1863 warnonremove = true;
1865 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1866 warnonremove = true;
1872 if(node && !check_id(node)) {
1873 fprintf(stderr, "Invalid name for node.\n");
1883 if(force || action < 0) {
1884 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1886 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1888 if(node && node != line) {
1896 // Open the right configuration file.
1897 char filename[PATH_MAX];
1900 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
1907 snprintf(filename, sizeof(filename), "%s", tinc_conf);
1910 FILE *f = fopen(filename, "r");
1913 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1917 char tmpfile[PATH_MAX];
1921 if((size_t)snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename) >= sizeof(tmpfile)) {
1922 fprintf(stderr, "Filename too long: %s.config.tmp\n", filename);
1926 tf = fopen(tmpfile, "w");
1929 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1935 // Copy the file, making modifications on the fly, unless we are just getting a value.
1939 bool removed = false;
1942 while(fgets(buf1, sizeof(buf1), f)) {
1943 buf1[sizeof(buf1) - 1] = 0;
1944 strncpy(buf2, buf1, sizeof(buf2));
1946 // Parse line in a simple way
1949 size_t len = strcspn(buf2, "\t =");
1950 bvalue = buf2 + len;
1951 bvalue += strspn(bvalue, "\t ");
1953 if(*bvalue == '=') {
1955 bvalue += strspn(bvalue, "\t ");
1962 if(!strcasecmp(buf2, variable)) {
1966 printf("%s\n", bvalue);
1968 } else if(action == -1) {
1969 if(!*value || !strcasecmp(bvalue, value)) {
1975 } else if(action == 0) {
1976 // Warn if "set" was used for variables that can occur multiple times
1977 if(warnonremove && strcasecmp(bvalue, value)) {
1978 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1981 // Already set? Delete the rest...
1986 // Otherwise, replace.
1987 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1988 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1995 } else if(action > 0) {
1996 // Check if we've already seen this variable with the same value
1997 if(!strcasecmp(bvalue, value)) {
2004 // Copy original line...
2005 if(fputs(buf1, tf) < 0) {
2006 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2010 // Add newline if it is missing...
2011 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
2012 if(fputc('\n', tf) < 0) {
2013 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2020 // Make sure we read everything...
2021 if(ferror(f) || !feof(f)) {
2022 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
2027 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
2031 // Add new variable if necessary.
2032 if((action > 0 && !found) || (action == 0 && !set)) {
2033 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
2034 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2043 fprintf(stderr, "No matching configuration variables found.\n");
2048 // Make sure we wrote everything...
2050 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
2054 // Could we find what we had to remove?
2055 if(action < 0 && !removed) {
2057 fprintf(stderr, "No configuration variables deleted.\n");
2061 // Replace the configuration file with the new one
2064 if(remove(filename)) {
2065 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
2071 if(rename(tmpfile, filename)) {
2072 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
2076 // Silently try notifying a running tincd of changes.
2077 if(connect_tincd(false)) {
2078 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2084 static bool try_bind(int port) {
2085 struct addrinfo *ai = NULL, *aip;
2086 struct addrinfo hint = {
2087 .ai_flags = AI_PASSIVE,
2088 .ai_family = AF_UNSPEC,
2089 .ai_socktype = SOCK_STREAM,
2090 .ai_protocol = IPPROTO_TCP,
2093 bool success = true;
2095 snprintf(portstr, sizeof(portstr), "%d", port);
2097 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
2101 for(aip = ai; aip; aip = aip->ai_next) {
2102 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
2109 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
2122 int check_port(const char *name) {
2127 fprintf(stderr, "Warning: could not bind to port 655. ");
2129 for(int i = 0; i < 100; i++) {
2130 uint16_t port = 0x1000 + prng(0x8000);
2132 if(try_bind(port)) {
2133 char filename[PATH_MAX];
2134 snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", confbase, name);
2135 FILE *f = fopen(filename, "a");
2138 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
2139 fprintf(stderr, "Please change tinc's Port manually.\n");
2143 fprintf(f, "Port = %d\n", port);
2145 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
2150 fprintf(stderr, "Please change tinc's Port manually.\n");
2154 static int cmd_init(int argc, char *argv[]) {
2155 if(!access(tinc_conf, F_OK)) {
2156 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
2161 fprintf(stderr, "Too many arguments!\n");
2163 } else if(argc < 2) {
2166 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
2168 if(!fgets(buf, sizeof(buf), stdin)) {
2169 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
2173 size_t len = rstrip(buf);
2176 fprintf(stderr, "No name given!\n");
2182 fprintf(stderr, "No Name given!\n");
2186 name = strdup(argv[1]);
2189 fprintf(stderr, "No Name given!\n");
2194 if(!check_id(name)) {
2195 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
2199 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
2200 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
2204 if(mkdir(confbase, 0777) && errno != EEXIST) {
2205 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
2209 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
2210 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
2214 FILE *f = fopen(tinc_conf, "w");
2217 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
2221 fprintf(f, "Name = %s\n", name);
2224 #ifndef DISABLE_LEGACY
2226 if(!rsa_keygen(2048, false)) {
2232 if(!ed25519_keygen(false)) {
2239 char filename[PATH_MAX];
2240 snprintf(filename, sizeof(filename), "%s" SLASH "tinc-up", confbase);
2242 if(access(filename, F_OK)) {
2243 FILE *f = fopenmask(filename, "w", 0777);
2246 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
2250 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");
2260 static int cmd_generate_keys(int argc, char *argv[]) {
2261 #ifdef DISABLE_LEGACY
2269 fprintf(stderr, "Too many arguments!\n");
2274 name = get_my_name(false);
2277 #ifndef DISABLE_LEGACY
2279 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
2285 if(!ed25519_keygen(true)) {
2292 #ifndef DISABLE_LEGACY
2293 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
2295 fprintf(stderr, "Too many arguments!\n");
2300 name = get_my_name(false);
2303 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
2307 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
2311 fprintf(stderr, "Too many arguments!\n");
2316 name = get_my_name(false);
2319 return !ed25519_keygen(true);
2322 static int cmd_help(int argc, char *argv[]) {
2330 static int cmd_version(int argc, char *argv[]) {
2334 fprintf(stderr, "Too many arguments!\n");
2342 static int cmd_info(int argc, char *argv[]) {
2344 fprintf(stderr, "Invalid number of arguments.\n");
2348 if(!connect_tincd(true)) {
2352 return info(fd, argv[1]);
2355 static const char *conffiles[] = {
2366 static int cmd_edit(int argc, char *argv[]) {
2368 fprintf(stderr, "Invalid number of arguments.\n");
2372 char filename[PATH_MAX] = "";
2374 if(strncmp(argv[1], "hosts" SLASH, 6)) {
2375 for(int i = 0; conffiles[i]; i++) {
2376 if(!strcmp(argv[1], conffiles[i])) {
2377 snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
2386 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
2387 char *dash = strchr(argv[1], '-');
2392 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
2393 fprintf(stderr, "Invalid configuration filename.\n");
2401 const char *editor = getenv("VISUAL");
2404 editor = getenv("EDITOR");
2411 xasprintf(&command, "\"%s\" \"%s\"", editor, filename);
2413 xasprintf(&command, "edit \"%s\"", filename);
2415 int result = system(command);
2422 // Silently try notifying a running tincd of changes.
2423 if(connect_tincd(false)) {
2424 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2430 static int export(const char *name, FILE *out) {
2431 char filename[PATH_MAX];
2432 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2433 FILE *in = fopen(filename, "r");
2436 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
2440 fprintf(out, "Name = %s\n", name);
2443 while(fgets(buf, sizeof(buf), in)) {
2444 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
2450 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2459 static int cmd_export(int argc, char *argv[]) {
2463 fprintf(stderr, "Too many arguments!\n");
2467 char *name = get_my_name(true);
2473 int result = export(name, stdout);
2483 static int cmd_export_all(int argc, char *argv[]) {
2487 fprintf(stderr, "Too many arguments!\n");
2491 DIR *dir = opendir(hosts_dir);
2494 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2502 while((ent = readdir(dir))) {
2503 if(!check_id(ent->d_name)) {
2510 printf("#---------------------------------------------------------------#\n");
2513 result |= export(ent->d_name, stdout);
2525 static int cmd_import(int argc, char *argv[]) {
2529 fprintf(stderr, "Too many arguments!\n");
2538 char filename[PATH_MAX] = "";
2540 bool firstline = true;
2542 while(fgets(buf, sizeof(buf), in)) {
2543 if(sscanf(buf, "Name = %4095s", name) == 1) {
2546 if(!check_id(name)) {
2547 fprintf(stderr, "Invalid Name in input!\n");
2555 if((size_t)snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name) >= sizeof(filename)) {
2556 fprintf(stderr, "Filename too long: %s" SLASH "%s\n", hosts_dir, name);
2560 if(!force && !access(filename, F_OK)) {
2561 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2566 out = fopen(filename, "w");
2569 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2575 } else if(firstline) {
2576 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2581 if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
2586 if(fputs(buf, out) < 0) {
2587 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2598 fprintf(stderr, "Imported %d host configuration files.\n", count);
2601 fprintf(stderr, "No host configuration files imported.\n");
2606 static int cmd_exchange(int argc, char *argv[]) {
2607 return cmd_export(argc, argv) ? 1 : cmd_import(argc, argv);
2610 static int cmd_exchange_all(int argc, char *argv[]) {
2611 return cmd_export_all(argc, argv) ? 1 : cmd_import(argc, argv);
2614 static int switch_network(char *name) {
2615 if(strcmp(name, ".")) {
2616 if(!check_netname(name, false)) {
2617 fprintf(stderr, "Invalid character in netname!\n");
2621 if(!check_netname(name, true)) {
2622 fprintf(stderr, "Warning: unsafe character in netname!\n");
2632 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2639 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2640 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2641 xasprintf(&prompt, "%s> ", identname);
2646 static int cmd_network(int argc, char *argv[]) {
2648 fprintf(stderr, "Too many arguments!\n");
2653 return switch_network(argv[1]);
2656 DIR *dir = opendir(confdir);
2659 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2665 while((ent = readdir(dir))) {
2666 if(*ent->d_name == '.') {
2670 if(!strcmp(ent->d_name, "tinc.conf")) {
2675 char fname[PATH_MAX];
2676 snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
2678 if(!access(fname, R_OK)) {
2679 printf("%s\n", ent->d_name);
2688 static int cmd_fsck(int argc, char *argv[]) {
2692 fprintf(stderr, "Too many arguments!\n");
2696 return fsck(orig_argv[0]);
2699 static void *readfile(FILE *in, size_t *len) {
2701 size_t bufsize = 4096;
2702 char *buf = xmalloc(bufsize);
2705 size_t read = fread(buf + count, 1, bufsize - count, in);
2713 if(count >= bufsize) {
2715 buf = xrealloc(buf, bufsize);
2726 static int cmd_sign(int argc, char *argv[]) {
2728 fprintf(stderr, "Too many arguments!\n");
2733 name = get_my_name(true);
2740 char fname[PATH_MAX];
2741 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
2742 FILE *fp = fopen(fname, "r");
2745 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2749 ecdsa_t *key = ecdsa_read_pem_private_key(fp);
2752 fprintf(stderr, "Could not read private key from %s\n", fname);
2762 in = fopen(argv[1], "rb");
2765 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
2774 char *data = readfile(in, &len);
2781 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2786 // Ensure we sign our name and current time as well
2787 long t = time(NULL);
2789 xasprintf(&trailer, " %s %ld", name, t);
2790 size_t trailer_len = strlen(trailer);
2792 data = xrealloc(data, len + trailer_len);
2793 memcpy(data + len, trailer, trailer_len);
2798 if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
2799 fprintf(stderr, "Error generating signature\n");
2805 b64encode_tinc(sig, sig, 64);
2808 fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
2809 fwrite(data, len, 1, stdout);
2815 static int cmd_verify(int argc, char *argv[]) {
2817 fprintf(stderr, "Not enough arguments!\n");
2822 fprintf(stderr, "Too many arguments!\n");
2826 char *node = argv[1];
2828 if(!strcmp(node, ".")) {
2830 name = get_my_name(true);
2838 } else if(!strcmp(node, "*")) {
2841 if(!check_id(node)) {
2842 fprintf(stderr, "Invalid node name\n");
2850 in = fopen(argv[2], "rb");
2853 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
2861 char *data = readfile(in, &len);
2868 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2872 char *newline = memchr(data, '\n', len);
2874 if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
2875 fprintf(stderr, "Invalid input\n");
2881 size_t skip = newline - data;
2883 char signer[MAX_STRING_SIZE] = "";
2884 char sig[MAX_STRING_SIZE] = "";
2887 if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
2888 fprintf(stderr, "Invalid input\n");
2893 if(node && strcmp(node, signer)) {
2894 fprintf(stderr, "Signature is not made by %s\n", node);
2904 xasprintf(&trailer, " %s %ld", signer, t);
2905 size_t trailer_len = strlen(trailer);
2907 data = xrealloc(data, len + trailer_len);
2908 memcpy(data + len, trailer, trailer_len);
2911 newline = data + skip;
2913 char fname[PATH_MAX];
2914 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
2915 FILE *fp = fopen(fname, "r");
2918 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2923 ecdsa_t *key = get_pubkey(fp);
2927 key = ecdsa_read_pem_public_key(fp);
2931 fprintf(stderr, "Could not read public key from %s\n", fname);
2939 if(b64decode_tinc(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
2940 fprintf(stderr, "Invalid signature\n");
2948 fwrite(newline, len - (newline - data), 1, stdout);
2954 static const struct {
2955 const char *command;
2956 int (*function)(int argc, char *argv[]);
2959 {"start", cmd_start, false},
2960 {"stop", cmd_stop, false},
2961 {"restart", cmd_restart, false},
2962 {"reload", cmd_reload, false},
2963 {"dump", cmd_dump, false},
2964 {"list", cmd_dump, false},
2965 {"purge", cmd_purge, false},
2966 {"debug", cmd_debug, false},
2967 {"retry", cmd_retry, false},
2968 {"connect", cmd_connect, false},
2969 {"disconnect", cmd_disconnect, false},
2970 {"top", cmd_top, false},
2971 {"pcap", cmd_pcap, false},
2972 {"log", cmd_log, false},
2973 {"pid", cmd_pid, false},
2974 {"config", cmd_config, true},
2975 {"add", cmd_config, false},
2976 {"del", cmd_config, false},
2977 {"get", cmd_config, false},
2978 {"set", cmd_config, false},
2979 {"init", cmd_init, false},
2980 {"generate-keys", cmd_generate_keys, false},
2981 #ifndef DISABLE_LEGACY
2982 {"generate-rsa-keys", cmd_generate_rsa_keys, false},
2984 {"generate-ed25519-keys", cmd_generate_ed25519_keys, false},
2985 {"help", cmd_help, false},
2986 {"version", cmd_version, false},
2987 {"info", cmd_info, false},
2988 {"edit", cmd_edit, false},
2989 {"export", cmd_export, false},
2990 {"export-all", cmd_export_all, false},
2991 {"import", cmd_import, false},
2992 {"exchange", cmd_exchange, false},
2993 {"exchange-all", cmd_exchange_all, false},
2994 {"invite", cmd_invite, false},
2995 {"join", cmd_join, false},
2996 {"network", cmd_network, false},
2997 {"fsck", cmd_fsck, false},
2998 {"sign", cmd_sign, false},
2999 {"verify", cmd_verify, false},
3000 {NULL, NULL, false},
3003 #ifdef HAVE_READLINE
3004 static char *complete_command(const char *text, int state) {
3013 while(commands[i].command) {
3014 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
3015 return xstrdup(commands[i].command);
3024 static char *complete_dump(const char *text, int state) {
3025 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
3035 if(!strncasecmp(matches[i], text, strlen(text))) {
3036 return xstrdup(matches[i]);
3045 static char *complete_config(const char *text, int state) {
3054 while(variables[i].name) {
3055 char *dot = strchr(text, '.');
3058 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
3060 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
3064 if(!strncasecmp(variables[i].name, text, strlen(text))) {
3065 return xstrdup(variables[i].name);
3075 static char *complete_info(const char *text, int state) {
3081 if(!connect_tincd(false)) {
3085 // Check the list of nodes
3086 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
3087 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
3090 while(recvline(fd, line, sizeof(line))) {
3092 int n = sscanf(line, "%d %d %4095s", &code, &req, item);
3105 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
3109 if(!strncmp(item, text, strlen(text))) {
3110 return xstrdup(strip_weight(item));
3117 static char *complete_nothing(const char *text, int state) {
3123 static char **completion(const char *text, int start, int end) {
3125 char **matches = NULL;
3128 matches = rl_completion_matches(text, complete_command);
3129 } else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
3130 matches = rl_completion_matches(text, complete_dump);
3131 } else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
3132 matches = rl_completion_matches(text, complete_config);
3133 } else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
3134 matches = rl_completion_matches(text, complete_config);
3135 } else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
3136 matches = rl_completion_matches(text, complete_config);
3137 } else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
3138 matches = rl_completion_matches(text, complete_config);
3139 } else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
3140 matches = rl_completion_matches(text, complete_info);
3147 static int cmd_shell(int argc, char *argv[]) {
3148 xasprintf(&prompt, "%s> ", identname);
3152 int maxargs = argc + 16;
3153 char **nargv = xmalloc(maxargs * sizeof(*nargv));
3155 for(int i = 0; i < argc; i++) {
3159 #ifdef HAVE_READLINE
3160 rl_readline_name = "tinc";
3161 rl_basic_word_break_characters = "\t\n ";
3162 rl_completion_entry_function = complete_nothing;
3163 rl_attempted_completion_function = completion;
3164 rl_filename_completion_desired = 0;
3169 #ifdef HAVE_READLINE
3174 line = readline(prompt);
3175 copy = line ? xstrdup(line) : NULL;
3177 line = fgets(buf, sizeof(buf), stdin);
3183 fputs(prompt, stdout);
3186 line = fgets(buf, sizeof(buf), stdin);
3193 /* Ignore comments */
3202 char *p = line + strspn(line, " \t\n");
3203 char *next = strtok(p, " \t\n");
3206 if(nargc >= maxargs) {
3208 nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
3213 next = strtok(NULL, " \t\n");
3220 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
3221 #ifdef HAVE_READLINE
3230 for(int i = 0; commands[i].command; i++) {
3231 if(!strcasecmp(nargv[argc], commands[i].command)) {
3232 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
3238 #ifdef HAVE_READLINE
3247 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
3252 #ifdef HAVE_READLINE
3264 static void cleanup(void) {
3270 int main(int argc, char *argv[]) {
3271 program_name = argv[0];
3273 tty = isatty(0) && isatty(1);
3275 if(!parse_options(argc, argv)) {
3280 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
3281 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
3295 static struct WSAData wsa_state;
3297 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
3298 fprintf(stderr, "System call `%s' failed: %s\n", "WSAStartup", winerror(GetLastError()));
3304 gettimeofday(&now, NULL);
3308 if(optind >= argc) {
3309 return cmd_shell(argc, argv);
3312 for(int i = 0; commands[i].command; i++) {
3313 if(!strcasecmp(argv[optind], commands[i].command)) {
3314 return commands[i].function(argc - optind, argv + optind);
3318 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);