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 node_status_t status;
1248 long int last_state_change;
1250 uint64_t in_packets, in_bytes, out_packets, out_bytes;
1253 case REQ_DUMP_NODES: {
1254 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.value, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change, &udp_ping_rtt, &in_packets, &in_bytes, &out_packets, &out_bytes);
1257 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1262 const char *color = "black";
1264 if(!strcmp(host, "MYSELF")) {
1266 } else if(!status.reachable) {
1268 } else if(strcmp(via, node)) {
1270 } else if(!status.validkey) {
1272 } else if(minmtu > 0) {
1276 printf(" \"%s\" [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1278 if(only_reachable && !status.reachable) {
1282 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,
1283 node, id, host, port, cipher, digest, maclength, compression, options, status.value, nexthop, via, distance, pmtu, minmtu, maxmtu, in_packets, in_bytes, out_packets, out_bytes);
1285 if(udp_ping_rtt != -1) {
1286 printf(" rtt %d.%03d", udp_ping_rtt / 1000, udp_ping_rtt % 1000);
1294 case REQ_DUMP_EDGES: {
1295 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);
1298 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1303 float w = 1.0f + 65536.0f / (float)weight;
1305 if(do_graph == 1 && strcmp(node1, node2) > 0) {
1306 printf(" \"%s\" -- \"%s\" [w = %f, weight = %f];\n", node1, node2, w, w);
1307 } else if(do_graph == 2) {
1308 printf(" \"%s\" -> \"%s\" [w = %f, weight = %f];\n", node1, node2, w, w);
1311 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);
1316 case REQ_DUMP_SUBNETS: {
1317 int n = sscanf(line, "%*d %*d %4095s %4095s", subnet, node);
1320 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1324 printf("%s owner %s\n", strip_weight(subnet), node);
1328 case REQ_DUMP_CONNECTIONS: {
1329 int n = sscanf(line, "%*d %*d %4095s %4095s port %4095s %x %d %x", node, host, port, &options, &socket, &status.value);
1332 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1336 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status.value);
1341 fprintf(stderr, "Unable to parse dump from tincd.\n");
1346 fprintf(stderr, "Error receiving dump.\n");
1350 static int cmd_purge(int argc, char *argv[]) {
1354 fprintf(stderr, "Too many arguments!\n");
1358 if(!connect_tincd(true)) {
1362 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1364 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1365 fprintf(stderr, "Could not purge old information.\n");
1372 static int cmd_debug(int argc, char *argv[]) {
1374 fprintf(stderr, "Invalid number of arguments.\n");
1378 if(!connect_tincd(true)) {
1382 int debuglevel = atoi(argv[1]);
1385 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1387 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1388 fprintf(stderr, "Could not set debug level.\n");
1392 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1396 static int cmd_retry(int argc, char *argv[]) {
1400 fprintf(stderr, "Too many arguments!\n");
1404 if(!connect_tincd(true)) {
1408 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1410 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1411 fprintf(stderr, "Could not retry outgoing connections.\n");
1418 static int cmd_connect(int argc, char *argv[]) {
1420 fprintf(stderr, "Invalid number of arguments.\n");
1424 if(!check_id(argv[1])) {
1425 fprintf(stderr, "Invalid name for node.\n");
1429 if(!connect_tincd(true)) {
1433 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1435 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1436 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1443 static int cmd_disconnect(int argc, char *argv[]) {
1445 fprintf(stderr, "Invalid number of arguments.\n");
1449 if(!check_id(argv[1])) {
1450 fprintf(stderr, "Invalid name for node.\n");
1454 if(!connect_tincd(true)) {
1458 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1460 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1461 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1468 static int cmd_top(int argc, char *argv[]) {
1472 fprintf(stderr, "Too many arguments!\n");
1478 if(!connect_tincd(true)) {
1485 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1490 static int cmd_pcap(int argc, char *argv[]) {
1492 fprintf(stderr, "Too many arguments!\n");
1496 if(!connect_tincd(true)) {
1500 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1505 static void sigint_handler(int sig) {
1508 fprintf(stderr, "\n");
1509 shutdown(fd, SHUT_RDWR);
1513 static int cmd_log(int argc, char *argv[]) {
1515 fprintf(stderr, "Too many arguments!\n");
1519 if(!connect_tincd(true)) {
1524 signal(SIGINT, sigint_handler);
1527 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1530 signal(SIGINT, SIG_DFL);
1538 static int cmd_pid(int argc, char *argv[]) {
1542 fprintf(stderr, "Too many arguments!\n");
1546 if(!connect_tincd(true) || !pid) {
1550 printf("%d\n", pid);
1554 size_t rstrip(char *value) {
1555 size_t len = strlen(value);
1557 while(len && strchr("\t\r\n ", value[len - 1])) {
1564 char *get_my_name(bool verbose) {
1565 FILE *f = fopen(tinc_conf, "r");
1569 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1578 while(fgets(buf, sizeof(buf), f)) {
1579 size_t len = strcspn(buf, "\t =");
1581 value += strspn(value, "\t ");
1585 value += strspn(value, "\t ");
1588 if(!rstrip(value)) {
1594 if(strcasecmp(buf, "Name")) {
1600 return replace_name(value);
1607 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1613 ecdsa_t *get_pubkey(FILE *f) {
1617 while(fgets(buf, sizeof(buf), f)) {
1618 size_t len = strcspn(buf, "\t =");
1620 value += strspn(value, "\t ");
1624 value += strspn(value, "\t ");
1627 if(!rstrip(value)) {
1633 if(strcasecmp(buf, "Ed25519PublicKey")) {
1638 return ecdsa_set_base64_public_key(value);
1645 const var_t variables[] = {
1646 /* Server configuration */
1647 {"AddressFamily", VAR_SERVER | VAR_SAFE},
1648 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1649 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1650 {"BindToInterface", VAR_SERVER},
1651 {"Broadcast", VAR_SERVER | VAR_SAFE},
1652 {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1653 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1654 {"DecrementTTL", VAR_SERVER | VAR_SAFE},
1655 {"Device", VAR_SERVER},
1656 {"DeviceStandby", VAR_SERVER},
1657 {"DeviceType", VAR_SERVER},
1658 {"DirectOnly", VAR_SERVER | VAR_SAFE},
1659 {"Ed25519PrivateKeyFile", VAR_SERVER},
1660 {"ExperimentalProtocol", VAR_SERVER},
1661 {"Forwarding", VAR_SERVER},
1662 {"FWMark", VAR_SERVER},
1663 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1664 {"Hostnames", VAR_SERVER},
1665 {"IffOneQueue", VAR_SERVER},
1666 {"Interface", VAR_SERVER},
1667 {"InvitationExpire", VAR_SERVER},
1668 {"KeyExpire", VAR_SERVER | VAR_SAFE},
1669 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1670 {"LocalDiscovery", VAR_SERVER | VAR_SAFE},
1671 {"LogLevel", VAR_SERVER},
1672 {"MACExpire", VAR_SERVER | VAR_SAFE},
1673 {"MaxConnectionBurst", VAR_SERVER | VAR_SAFE},
1674 {"MaxOutputBufferSize", VAR_SERVER | VAR_SAFE},
1675 {"MaxTimeout", VAR_SERVER | VAR_SAFE},
1676 {"Mode", VAR_SERVER | VAR_SAFE},
1677 {"Name", VAR_SERVER},
1678 {"PingInterval", VAR_SERVER | VAR_SAFE},
1679 {"PingTimeout", VAR_SERVER | VAR_SAFE},
1680 {"PriorityInheritance", VAR_SERVER},
1681 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1682 {"PrivateKeyFile", VAR_SERVER},
1683 {"ProcessPriority", VAR_SERVER},
1684 {"Proxy", VAR_SERVER},
1685 {"ReplayWindow", VAR_SERVER | VAR_SAFE},
1686 {"ScriptsExtension", VAR_SERVER},
1687 {"ScriptsInterpreter", VAR_SERVER},
1688 {"StrictSubnets", VAR_SERVER | VAR_SAFE},
1689 {"TunnelServer", VAR_SERVER | VAR_SAFE},
1690 {"UDPDiscovery", VAR_SERVER | VAR_SAFE},
1691 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER | VAR_SAFE},
1692 {"UDPDiscoveryInterval", VAR_SERVER | VAR_SAFE},
1693 {"UDPDiscoveryTimeout", VAR_SERVER | VAR_SAFE},
1694 {"MTUInfoInterval", VAR_SERVER | VAR_SAFE},
1695 {"UDPInfoInterval", VAR_SERVER | VAR_SAFE},
1696 {"UDPRcvBuf", VAR_SERVER},
1697 {"UDPSndBuf", VAR_SERVER},
1698 {"UPnP", VAR_SERVER},
1699 {"UPnPDiscoverWait", VAR_SERVER},
1700 {"UPnPRefreshPeriod", VAR_SERVER},
1701 {"VDEGroup", VAR_SERVER},
1702 {"VDEPort", VAR_SERVER},
1703 /* Host configuration */
1704 {"Address", VAR_HOST | VAR_MULTIPLE},
1705 {"Cipher", VAR_SERVER | VAR_HOST},
1706 {"ClampMSS", VAR_SERVER | VAR_HOST | VAR_SAFE},
1707 {"Compression", VAR_SERVER | VAR_HOST | VAR_SAFE},
1708 {"Digest", VAR_SERVER | VAR_HOST},
1709 {"Ed25519PublicKey", VAR_HOST},
1710 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1711 {"IndirectData", VAR_SERVER | VAR_HOST | VAR_SAFE},
1712 {"MACLength", VAR_SERVER | VAR_HOST},
1713 {"PMTU", VAR_SERVER | VAR_HOST},
1714 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1716 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1717 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1718 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1719 {"TCPOnly", VAR_SERVER | VAR_HOST | VAR_SAFE},
1720 {"Weight", VAR_HOST | VAR_SAFE},
1724 static int cmd_config(int argc, char *argv[]) {
1726 fprintf(stderr, "Invalid number of arguments.\n");
1730 if(strcasecmp(argv[0], "config")) {
1736 if(!strcasecmp(argv[1], "get")) {
1738 } else if(!strcasecmp(argv[1], "add")) {
1739 argv++, argc--, action = 1;
1740 } else if(!strcasecmp(argv[1], "del")) {
1741 argv++, argc--, action = -1;
1742 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1743 argv++, argc--, action = 0;
1747 fprintf(stderr, "Invalid number of arguments.\n");
1751 // Concatenate the rest of the command line
1752 strncpy(line, argv[1], sizeof(line) - 1);
1754 for(int i = 2; i < argc; i++) {
1755 strncat(line, " ", sizeof(line) - 1 - strlen(line));
1756 strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
1759 // Liberal parsing into node name, variable name and value.
1765 len = strcspn(line, "\t =");
1767 value += strspn(value, "\t ");
1771 value += strspn(value, "\t ");
1775 variable = strchr(line, '.');
1785 fprintf(stderr, "No variable given.\n");
1789 if(action >= 0 && !*value) {
1790 fprintf(stderr, "No value for variable given.\n");
1794 if(action < -1 && *value) {
1798 /* Some simple checks. */
1800 bool warnonremove = false;
1802 for(int i = 0; variables[i].name; i++) {
1803 if(strcasecmp(variables[i].name, variable)) {
1808 variable = (char *)variables[i].name;
1810 if(!strcasecmp(variable, "Subnet") && *value) {
1813 if(!str2net(&s, value)) {
1814 fprintf(stderr, "Malformed subnet definition %s\n", value);
1818 if(!subnetcheck(s)) {
1819 fprintf(stderr, "Network address and prefix length do not match: %s\n", value);
1824 /* Discourage use of obsolete variables. */
1826 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1828 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1830 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1835 /* Don't put server variables in host config files */
1837 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1839 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1841 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1846 /* Should this go into our own host config file? */
1848 if(!node && !(variables[i].type & VAR_SERVER)) {
1849 node = get_my_name(true);
1856 /* Change "add" into "set" for variables that do not allow multiple occurrences.
1857 Turn on warnings when it seems variables might be removed unintentionally. */
1859 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1860 warnonremove = true;
1862 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1863 warnonremove = true;
1869 if(node && !check_id(node)) {
1870 fprintf(stderr, "Invalid name for node.\n");
1880 if(force || action < 0) {
1881 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1883 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1885 if(node && node != line) {
1893 // Open the right configuration file.
1894 char filename[PATH_MAX];
1897 if((size_t)snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node) >= sizeof(filename)) {
1898 fprintf(stderr, "Filename too long: %s" SLASH "%s\n", hosts_dir, node);
1908 snprintf(filename, sizeof(filename), "%s", tinc_conf);
1911 FILE *f = fopen(filename, "r");
1914 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1918 char tmpfile[PATH_MAX];
1922 if((size_t)snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename) >= sizeof(tmpfile)) {
1923 fprintf(stderr, "Filename too long: %s.config.tmp\n", filename);
1927 tf = fopen(tmpfile, "w");
1930 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1936 // Copy the file, making modifications on the fly, unless we are just getting a value.
1940 bool removed = false;
1943 while(fgets(buf1, sizeof(buf1), f)) {
1944 buf1[sizeof(buf1) - 1] = 0;
1945 strncpy(buf2, buf1, sizeof(buf2));
1947 // Parse line in a simple way
1950 size_t len = strcspn(buf2, "\t =");
1951 bvalue = buf2 + len;
1952 bvalue += strspn(bvalue, "\t ");
1954 if(*bvalue == '=') {
1956 bvalue += strspn(bvalue, "\t ");
1963 if(!strcasecmp(buf2, variable)) {
1967 printf("%s\n", bvalue);
1969 } else if(action == -1) {
1970 if(!*value || !strcasecmp(bvalue, value)) {
1976 } else if(action == 0) {
1977 // Warn if "set" was used for variables that can occur multiple times
1978 if(warnonremove && strcasecmp(bvalue, value)) {
1979 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1982 // Already set? Delete the rest...
1987 // Otherwise, replace.
1988 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1989 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1996 } else if(action > 0) {
1997 // Check if we've already seen this variable with the same value
1998 if(!strcasecmp(bvalue, value)) {
2005 // Copy original line...
2006 if(fputs(buf1, tf) < 0) {
2007 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2011 // Add newline if it is missing...
2012 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
2013 if(fputc('\n', tf) < 0) {
2014 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2021 // Make sure we read everything...
2022 if(ferror(f) || !feof(f)) {
2023 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
2028 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
2032 // Add new variable if necessary.
2033 if((action > 0 && !found) || (action == 0 && !set)) {
2034 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
2035 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2044 fprintf(stderr, "No matching configuration variables found.\n");
2049 // Make sure we wrote everything...
2051 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
2055 // Could we find what we had to remove?
2056 if(action < 0 && !removed) {
2058 fprintf(stderr, "No configuration variables deleted.\n");
2062 // Replace the configuration file with the new one
2065 if(remove(filename)) {
2066 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
2072 if(rename(tmpfile, filename)) {
2073 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
2077 // Silently try notifying a running tincd of changes.
2078 if(connect_tincd(false)) {
2079 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2085 static bool try_bind(int port) {
2086 struct addrinfo *ai = NULL, *aip;
2087 struct addrinfo hint = {
2088 .ai_flags = AI_PASSIVE,
2089 .ai_family = AF_UNSPEC,
2090 .ai_socktype = SOCK_STREAM,
2091 .ai_protocol = IPPROTO_TCP,
2094 bool success = true;
2096 snprintf(portstr, sizeof(portstr), "%d", port);
2098 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
2102 for(aip = ai; aip; aip = aip->ai_next) {
2103 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
2110 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
2123 int check_port(const char *name) {
2128 fprintf(stderr, "Warning: could not bind to port 655. ");
2130 for(int i = 0; i < 100; i++) {
2131 uint16_t port = 0x1000 + prng(0x8000);
2133 if(try_bind(port)) {
2134 char filename[PATH_MAX];
2135 snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", confbase, name);
2136 FILE *f = fopen(filename, "a");
2139 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
2140 fprintf(stderr, "Please change tinc's Port manually.\n");
2144 fprintf(f, "Port = %d\n", port);
2146 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
2151 fprintf(stderr, "Please change tinc's Port manually.\n");
2155 static int cmd_init(int argc, char *argv[]) {
2156 if(!access(tinc_conf, F_OK)) {
2157 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
2162 fprintf(stderr, "Too many arguments!\n");
2164 } else if(argc < 2) {
2167 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
2169 if(!fgets(buf, sizeof(buf), stdin)) {
2170 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
2174 size_t len = rstrip(buf);
2177 fprintf(stderr, "No name given!\n");
2183 fprintf(stderr, "No Name given!\n");
2187 name = strdup(argv[1]);
2190 fprintf(stderr, "No Name given!\n");
2195 if(!check_id(name)) {
2196 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
2200 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
2201 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
2205 if(mkdir(confbase, 0777) && errno != EEXIST) {
2206 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
2210 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
2211 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
2215 FILE *f = fopen(tinc_conf, "w");
2218 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
2222 fprintf(f, "Name = %s\n", name);
2225 #ifndef DISABLE_LEGACY
2227 if(!rsa_keygen(2048, false)) {
2233 if(!ed25519_keygen(false)) {
2240 char filename[PATH_MAX];
2241 snprintf(filename, sizeof(filename), "%s" SLASH "tinc-up", confbase);
2243 if(access(filename, F_OK)) {
2244 FILE *f = fopenmask(filename, "w", 0777);
2247 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
2251 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");
2261 static int cmd_generate_keys(int argc, char *argv[]) {
2262 #ifdef DISABLE_LEGACY
2270 fprintf(stderr, "Too many arguments!\n");
2275 name = get_my_name(false);
2278 #ifndef DISABLE_LEGACY
2280 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
2286 if(!ed25519_keygen(true)) {
2293 #ifndef DISABLE_LEGACY
2294 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
2296 fprintf(stderr, "Too many arguments!\n");
2301 name = get_my_name(false);
2304 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
2308 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
2312 fprintf(stderr, "Too many arguments!\n");
2317 name = get_my_name(false);
2320 return !ed25519_keygen(true);
2323 static int cmd_help(int argc, char *argv[]) {
2331 static int cmd_version(int argc, char *argv[]) {
2335 fprintf(stderr, "Too many arguments!\n");
2343 static int cmd_info(int argc, char *argv[]) {
2345 fprintf(stderr, "Invalid number of arguments.\n");
2349 if(!connect_tincd(true)) {
2353 return info(fd, argv[1]);
2356 static const char *conffiles[] = {
2367 static int cmd_edit(int argc, char *argv[]) {
2369 fprintf(stderr, "Invalid number of arguments.\n");
2373 char filename[PATH_MAX] = "";
2375 if(strncmp(argv[1], "hosts" SLASH, 6)) {
2376 for(int i = 0; conffiles[i]; i++) {
2377 if(!strcmp(argv[1], conffiles[i])) {
2378 snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
2387 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
2388 char *dash = strchr(argv[1], '-');
2393 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
2394 fprintf(stderr, "Invalid configuration filename.\n");
2402 const char *editor = getenv("VISUAL");
2405 editor = getenv("EDITOR");
2412 xasprintf(&command, "\"%s\" \"%s\"", editor, filename);
2414 xasprintf(&command, "edit \"%s\"", filename);
2416 int result = system(command);
2423 // Silently try notifying a running tincd of changes.
2424 if(connect_tincd(false)) {
2425 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2431 static int export(const char *name, FILE *out) {
2432 char filename[PATH_MAX];
2433 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2434 FILE *in = fopen(filename, "r");
2437 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
2441 fprintf(out, "Name = %s\n", name);
2444 while(fgets(buf, sizeof(buf), in)) {
2445 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
2451 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2460 static int cmd_export(int argc, char *argv[]) {
2464 fprintf(stderr, "Too many arguments!\n");
2468 char *name = get_my_name(true);
2474 int result = export(name, stdout);
2484 static int cmd_export_all(int argc, char *argv[]) {
2488 fprintf(stderr, "Too many arguments!\n");
2492 DIR *dir = opendir(hosts_dir);
2495 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2503 while((ent = readdir(dir))) {
2504 if(!check_id(ent->d_name)) {
2511 printf("#---------------------------------------------------------------#\n");
2514 result |= export(ent->d_name, stdout);
2526 static int cmd_import(int argc, char *argv[]) {
2530 fprintf(stderr, "Too many arguments!\n");
2539 char filename[PATH_MAX] = "";
2541 bool firstline = true;
2543 while(fgets(buf, sizeof(buf), in)) {
2544 if(sscanf(buf, "Name = %4095s", name) == 1) {
2547 if(!check_id(name)) {
2548 fprintf(stderr, "Invalid Name in input!\n");
2556 if((size_t)snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name) >= sizeof(filename)) {
2557 fprintf(stderr, "Filename too long: %s" SLASH "%s\n", hosts_dir, name);
2561 if(!force && !access(filename, F_OK)) {
2562 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2567 out = fopen(filename, "w");
2570 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2576 } else if(firstline) {
2577 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2582 if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
2587 if(fputs(buf, out) < 0) {
2588 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2599 fprintf(stderr, "Imported %d host configuration files.\n", count);
2602 fprintf(stderr, "No host configuration files imported.\n");
2607 static int cmd_exchange(int argc, char *argv[]) {
2608 return cmd_export(argc, argv) ? 1 : cmd_import(argc, argv);
2611 static int cmd_exchange_all(int argc, char *argv[]) {
2612 return cmd_export_all(argc, argv) ? 1 : cmd_import(argc, argv);
2615 static int switch_network(char *name) {
2616 if(strcmp(name, ".")) {
2617 if(!check_netname(name, false)) {
2618 fprintf(stderr, "Invalid character in netname!\n");
2622 if(!check_netname(name, true)) {
2623 fprintf(stderr, "Warning: unsafe character in netname!\n");
2633 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2640 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2641 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2642 xasprintf(&prompt, "%s> ", identname);
2647 static int cmd_network(int argc, char *argv[]) {
2649 fprintf(stderr, "Too many arguments!\n");
2654 return switch_network(argv[1]);
2657 DIR *dir = opendir(confdir);
2660 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2666 while((ent = readdir(dir))) {
2667 if(*ent->d_name == '.') {
2671 if(!strcmp(ent->d_name, "tinc.conf")) {
2676 char fname[PATH_MAX];
2677 snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
2679 if(!access(fname, R_OK)) {
2680 printf("%s\n", ent->d_name);
2689 static int cmd_fsck(int argc, char *argv[]) {
2693 fprintf(stderr, "Too many arguments!\n");
2697 return fsck(orig_argv[0]);
2700 static void *readfile(FILE *in, size_t *len) {
2702 size_t bufsize = 4096;
2703 char *buf = xmalloc(bufsize);
2706 size_t read = fread(buf + count, 1, bufsize - count, in);
2714 if(count >= bufsize) {
2716 buf = xrealloc(buf, bufsize);
2727 static int cmd_sign(int argc, char *argv[]) {
2729 fprintf(stderr, "Too many arguments!\n");
2734 name = get_my_name(true);
2741 char fname[PATH_MAX];
2742 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
2743 FILE *fp = fopen(fname, "r");
2746 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2750 ecdsa_t *key = ecdsa_read_pem_private_key(fp);
2753 fprintf(stderr, "Could not read private key from %s\n", fname);
2763 in = fopen(argv[1], "rb");
2766 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
2775 char *data = readfile(in, &len);
2782 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2787 // Ensure we sign our name and current time as well
2788 long t = time(NULL);
2790 xasprintf(&trailer, " %s %ld", name, t);
2791 size_t trailer_len = strlen(trailer);
2793 data = xrealloc(data, len + trailer_len);
2794 memcpy(data + len, trailer, trailer_len);
2799 if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
2800 fprintf(stderr, "Error generating signature\n");
2806 b64encode_tinc(sig, sig, 64);
2809 fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
2810 fwrite(data, len, 1, stdout);
2816 static int cmd_verify(int argc, char *argv[]) {
2818 fprintf(stderr, "Not enough arguments!\n");
2823 fprintf(stderr, "Too many arguments!\n");
2827 char *node = argv[1];
2829 if(!strcmp(node, ".")) {
2831 name = get_my_name(true);
2839 } else if(!strcmp(node, "*")) {
2842 if(!check_id(node)) {
2843 fprintf(stderr, "Invalid node name\n");
2851 in = fopen(argv[2], "rb");
2854 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
2862 char *data = readfile(in, &len);
2869 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2873 char *newline = memchr(data, '\n', len);
2875 if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
2876 fprintf(stderr, "Invalid input\n");
2882 size_t skip = newline - data;
2884 char signer[MAX_STRING_SIZE] = "";
2885 char sig[MAX_STRING_SIZE] = "";
2888 if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
2889 fprintf(stderr, "Invalid input\n");
2894 if(node && strcmp(node, signer)) {
2895 fprintf(stderr, "Signature is not made by %s\n", node);
2905 xasprintf(&trailer, " %s %ld", signer, t);
2906 size_t trailer_len = strlen(trailer);
2908 data = xrealloc(data, len + trailer_len);
2909 memcpy(data + len, trailer, trailer_len);
2912 newline = data + skip;
2914 char fname[PATH_MAX];
2915 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
2916 FILE *fp = fopen(fname, "r");
2919 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2924 ecdsa_t *key = get_pubkey(fp);
2928 key = ecdsa_read_pem_public_key(fp);
2932 fprintf(stderr, "Could not read public key from %s\n", fname);
2940 if(b64decode_tinc(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
2941 fprintf(stderr, "Invalid signature\n");
2949 fwrite(newline, len - (newline - data), 1, stdout);
2955 static const struct {
2956 const char *command;
2957 int (*function)(int argc, char *argv[]);
2960 {"start", cmd_start, false},
2961 {"stop", cmd_stop, false},
2962 {"restart", cmd_restart, false},
2963 {"reload", cmd_reload, false},
2964 {"dump", cmd_dump, false},
2965 {"list", cmd_dump, false},
2966 {"purge", cmd_purge, false},
2967 {"debug", cmd_debug, false},
2968 {"retry", cmd_retry, false},
2969 {"connect", cmd_connect, false},
2970 {"disconnect", cmd_disconnect, false},
2971 {"top", cmd_top, false},
2972 {"pcap", cmd_pcap, false},
2973 {"log", cmd_log, false},
2974 {"pid", cmd_pid, false},
2975 {"config", cmd_config, true},
2976 {"add", cmd_config, false},
2977 {"del", cmd_config, false},
2978 {"get", cmd_config, false},
2979 {"set", cmd_config, false},
2980 {"init", cmd_init, false},
2981 {"generate-keys", cmd_generate_keys, false},
2982 #ifndef DISABLE_LEGACY
2983 {"generate-rsa-keys", cmd_generate_rsa_keys, false},
2985 {"generate-ed25519-keys", cmd_generate_ed25519_keys, false},
2986 {"help", cmd_help, false},
2987 {"version", cmd_version, false},
2988 {"info", cmd_info, false},
2989 {"edit", cmd_edit, false},
2990 {"export", cmd_export, false},
2991 {"export-all", cmd_export_all, false},
2992 {"import", cmd_import, false},
2993 {"exchange", cmd_exchange, false},
2994 {"exchange-all", cmd_exchange_all, false},
2995 {"invite", cmd_invite, false},
2996 {"join", cmd_join, false},
2997 {"network", cmd_network, false},
2998 {"fsck", cmd_fsck, false},
2999 {"sign", cmd_sign, false},
3000 {"verify", cmd_verify, false},
3001 {NULL, NULL, false},
3004 #ifdef HAVE_READLINE
3005 static char *complete_command(const char *text, int state) {
3014 while(commands[i].command) {
3015 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
3016 return xstrdup(commands[i].command);
3025 static char *complete_dump(const char *text, int state) {
3026 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
3036 if(!strncasecmp(matches[i], text, strlen(text))) {
3037 return xstrdup(matches[i]);
3046 static char *complete_config(const char *text, int state) {
3055 while(variables[i].name) {
3056 char *dot = strchr(text, '.');
3059 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
3061 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
3065 if(!strncasecmp(variables[i].name, text, strlen(text))) {
3066 return xstrdup(variables[i].name);
3076 static char *complete_info(const char *text, int state) {
3082 if(!connect_tincd(false)) {
3086 // Check the list of nodes
3087 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
3088 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
3091 while(recvline(fd, line, sizeof(line))) {
3093 int n = sscanf(line, "%d %d %4095s", &code, &req, item);
3106 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
3110 if(!strncmp(item, text, strlen(text))) {
3111 return xstrdup(strip_weight(item));
3118 static char *complete_nothing(const char *text, int state) {
3124 static char **completion(const char *text, int start, int end) {
3126 char **matches = NULL;
3129 matches = rl_completion_matches(text, complete_command);
3130 } else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
3131 matches = rl_completion_matches(text, complete_dump);
3132 } else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
3133 matches = rl_completion_matches(text, complete_config);
3134 } else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
3135 matches = rl_completion_matches(text, complete_config);
3136 } else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
3137 matches = rl_completion_matches(text, complete_config);
3138 } else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
3139 matches = rl_completion_matches(text, complete_config);
3140 } else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
3141 matches = rl_completion_matches(text, complete_info);
3148 static int cmd_shell(int argc, char *argv[]) {
3149 xasprintf(&prompt, "%s> ", identname);
3153 int maxargs = argc + 16;
3154 char **nargv = xmalloc(maxargs * sizeof(*nargv));
3156 for(int i = 0; i < argc; i++) {
3160 #ifdef HAVE_READLINE
3161 rl_readline_name = "tinc";
3162 rl_basic_word_break_characters = "\t\n ";
3163 rl_completion_entry_function = complete_nothing;
3164 rl_attempted_completion_function = completion;
3165 rl_filename_completion_desired = 0;
3170 #ifdef HAVE_READLINE
3175 line = readline(prompt);
3176 copy = line ? xstrdup(line) : NULL;
3178 line = fgets(buf, sizeof(buf), stdin);
3184 fputs(prompt, stdout);
3187 line = fgets(buf, sizeof(buf), stdin);
3194 /* Ignore comments */
3203 char *p = line + strspn(line, " \t\n");
3204 char *next = strtok(p, " \t\n");
3207 if(nargc >= maxargs) {
3209 nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
3214 next = strtok(NULL, " \t\n");
3221 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
3222 #ifdef HAVE_READLINE
3231 for(int i = 0; commands[i].command; i++) {
3232 if(!strcasecmp(nargv[argc], commands[i].command)) {
3233 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
3239 #ifdef HAVE_READLINE
3248 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
3253 #ifdef HAVE_READLINE
3265 static void cleanup(void) {
3271 int main(int argc, char *argv[]) {
3272 program_name = argv[0];
3274 tty = isatty(0) && isatty(1);
3276 if(!parse_options(argc, argv)) {
3281 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
3282 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
3296 static struct WSAData wsa_state;
3298 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
3299 fprintf(stderr, "System call `%s' failed: %s\n", "WSAStartup", winerror(GetLastError()));
3305 gettimeofday(&now, NULL);
3309 if(optind >= argc) {
3310 return cmd_shell(argc, argv);
3313 for(int i = 0; commands[i].command; i++) {
3314 if(!strcasecmp(argv[optind], commands[i].command)) {
3315 return commands[i].function(argc - optind, argv + optind);
3319 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);