2 tincctl.c -- Controlling a running tincd
3 Copyright (C) 2007-2017 Guus Sliepen <guus@tinc-vpn.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include "readline/readline.h"
26 #include "readline/history.h"
31 #include "control_common.h"
36 #include "invitation.h"
45 #define MSG_NOSIGNAL 0
48 static char **orig_argv;
51 /* If nonzero, display usage information and exit. */
52 static bool show_help = false;
54 /* If nonzero, print the version on standard output and exit. */
55 static bool show_version = false;
57 static char *name = NULL;
58 static char controlcookie[1025];
59 char *tinc_conf = NULL;
60 char *hosts_dir = NULL;
63 // Horrible global variables...
72 bool confbasegiven = false;
73 bool netnamegiven = false;
74 char *scriptinterpreter = NULL;
75 char *scriptextension = "";
81 static struct option const long_options[] = {
82 {"batch", no_argument, NULL, 'b'},
83 {"config", required_argument, NULL, 'c'},
84 {"net", required_argument, NULL, 'n'},
85 {"help", no_argument, NULL, 1},
86 {"version", no_argument, NULL, 2},
87 {"pidfile", required_argument, NULL, 3},
88 {"force", no_argument, NULL, 4},
92 static void version(void) {
93 printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
94 BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
95 printf("Copyright (C) 1998-2017 Ivo Timmermans, Guus Sliepen and others.\n"
96 "See the AUTHORS file for a complete list.\n\n"
97 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
98 "and you are welcome to redistribute it under certain conditions;\n"
99 "see the file COPYING for details.\n");
102 static void usage(bool status) {
104 fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
106 printf("Usage: %s [options] command\n\n", program_name);
107 printf("Valid options are:\n"
108 " -b, --batch Don't ask for anything (non-interactive mode).\n"
109 " -c, --config=DIR Read configuration options from DIR.\n"
110 " -n, --net=NETNAME Connect to net NETNAME.\n"
111 " --pidfile=FILENAME Read control cookie from FILENAME.\n"
112 " --force Force some commands to work despite warnings.\n"
113 " --help Display this help and exit.\n"
114 " --version Output version information and exit.\n"
116 "Valid commands are:\n"
117 " init [name] Create initial configuration files.\n"
118 " get VARIABLE Print current value of VARIABLE\n"
119 " set VARIABLE VALUE Set VARIABLE to VALUE\n"
120 " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
121 " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
122 " start [tincd options] Start tincd.\n"
123 " stop Stop tincd.\n"
124 " restart [tincd options] Restart tincd.\n"
125 " reload Partially reload configuration of running tincd.\n"
126 " pid Show PID of currently running tincd.\n"
127 #ifdef DISABLE_LEGACY
128 " generate-keys Generate a new Ed25519 public/private keypair.\n"
130 " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
131 " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
133 " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
134 " dump Dump a list of one of the following things:\n"
135 " [reachable] nodes - all known nodes in the VPN\n"
136 " edges - all known connections in the VPN\n"
137 " subnets - all known subnets in the VPN\n"
138 " connections - all meta connections with ourself\n"
139 " [di]graph - graph of the VPN in dotty format\n"
140 " invitations - outstanding invitations\n"
141 " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
142 " purge Purge unreachable nodes\n"
143 " debug N Set debug level\n"
144 " retry Retry all outgoing connections\n"
145 " disconnect NODE Close meta connection with NODE\n"
147 " top Show real-time statistics\n"
149 " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
150 " log [level] Dump log output [up to the specified level]\n"
151 " export Export host configuration of local node to standard output\n"
152 " export-all Export all host configuration files to standard output\n"
153 " import Import host configuration file(s) from standard input\n"
154 " exchange Same as export followed by import\n"
155 " exchange-all Same as export-all followed by import\n"
156 " invite NODE [...] Generate an invitation for NODE\n"
157 " join INVITATION Join a VPN using an INVITATION\n"
158 " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
159 " fsck Check the configuration files for problems.\n"
160 " sign [FILE] Generate a signed version of a file.\n"
161 " verify NODE [FILE] Verify that a file was signed by the given NODE.\n"
163 printf("Report bugs to tinc@tinc-vpn.org.\n");
167 static bool parse_options(int argc, char **argv) {
169 int option_index = 0;
171 while((r = getopt_long(argc, argv, "+bc:n:", long_options, &option_index)) != EOF) {
173 case 0: /* long option */
180 case 'c': /* config file */
181 confbase = xstrdup(optarg);
182 confbasegiven = true;
185 case 'n': /* net name given */
186 netname = xstrdup(optarg);
189 case 1: /* show help */
193 case 2: /* show version */
197 case 3: /* open control socket here */
198 pidfilename = xstrdup(optarg);
205 case '?': /* wrong options */
214 if(!netname && (netname = getenv("NETNAME"))) {
215 netname = xstrdup(netname);
218 /* netname "." is special: a "top-level name" */
220 if(netname && (!*netname || !strcmp(netname, "."))) {
225 if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
226 fprintf(stderr, "Invalid character in netname!\n");
233 /* Open a file with the desired permissions, minus the umask.
234 Also, if we want to create an executable file, we call fchmod()
235 to set the executable bits. */
237 FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
238 mode_t mask = umask(0);
241 FILE *f = fopen(filename, mode);
244 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
250 if((perms & 0444) && f) {
251 fchmod(fileno(f), perms);
259 static void disable_old_keys(const char *filename, const char *what) {
260 char tmpfile[PATH_MAX] = "";
262 bool disabled = false;
267 r = fopen(filename, "r");
273 snprintf(tmpfile, sizeof(tmpfile), "%s.tmp", filename);
275 struct stat st = {.st_mode = 0600};
276 fstat(fileno(r), &st);
277 w = fopenmask(tmpfile, "w", st.st_mode);
279 while(fgets(buf, sizeof(buf), r)) {
280 if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
281 if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
287 bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
294 if(block || ed25519pubkey) {
298 if(fputs(buf, w) < 0) {
304 if(block && !strncmp(buf, "-----END ", 9)) {
314 if(ferror(r) || fclose(r) < 0) {
320 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
330 // We cannot atomically replace files on Windows.
331 char bakfile[PATH_MAX] = "";
332 snprintf(bakfile, sizeof(bakfile), "%s.bak", filename);
334 if(rename(filename, bakfile) || rename(tmpfile, filename)) {
335 rename(bakfile, filename);
338 if(rename(tmpfile, filename)) {
340 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
345 fprintf(stderr, "Warning: old key(s) found and disabled.\n");
352 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
354 char directory[PATH_MAX] = ".";
358 /* Check stdin and stdout */
360 /* Ask for a file and/or directory name. */
361 fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
363 if(fgets(buf, sizeof(buf), stdin) == NULL) {
364 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
368 size_t len = strlen(buf);
381 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
384 if(filename[0] != '/') {
386 /* The directory is a relative path or a filename. */
387 getcwd(directory, sizeof(directory));
388 snprintf(buf2, sizeof(buf2), "%s" SLASH "%s", directory, filename);
392 disable_old_keys(filename, what);
394 /* Open it first to keep the inode busy */
396 r = fopenmask(filename, mode, perms);
399 fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
407 Generate a public/private Ed25519 keypair, and ask for a file to store
410 static bool ed25519_keygen(bool ask) {
413 char fname[PATH_MAX];
415 fprintf(stderr, "Generating Ed25519 keypair:\n");
417 if(!(key = ecdsa_generate())) {
418 fprintf(stderr, "Error during key generation!\n");
421 fprintf(stderr, "Done.\n");
424 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
425 f = ask_and_open(fname, "private Ed25519 key", "a", ask, 0600);
431 if(!ecdsa_write_pem_private_key(key, f)) {
432 fprintf(stderr, "Error writing private key!\n");
439 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
441 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.pub", confbase);
444 f = ask_and_open(fname, "public Ed25519 key", "a", ask, 0666);
450 char *pubkey = ecdsa_get_base64_public_key(key);
451 fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
469 #ifndef DISABLE_LEGACY
471 Generate a public/private RSA keypair, and ask for a file to store
474 static bool rsa_keygen(int bits, bool ask) {
477 char fname[PATH_MAX];
479 // Make sure the key size is a multiple of 8 bits.
482 // Make sure that a valid key size is used.
483 if(bits < 1024 || bits > 8192) {
484 fprintf(stderr, "Invalid key size %d specified! It should be between 1024 and 8192 bits.\n", bits);
486 } else if(bits < 2048) {
487 fprintf(stderr, "WARNING: generating a weak %d bits RSA key! 2048 or more bits are recommended.\n", bits);
490 fprintf(stderr, "Generating %d bits keys:\n", bits);
492 if(!(key = rsa_generate(bits, 0x10001))) {
493 fprintf(stderr, "Error during key generation!\n");
496 fprintf(stderr, "Done.\n");
499 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.priv", confbase);
500 f = ask_and_open(fname, "private RSA key", "a", ask, 0600);
506 if(!rsa_write_pem_private_key(key, f)) {
507 fprintf(stderr, "Error writing private key!\n");
514 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
516 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.pub", confbase);
519 f = ask_and_open(fname, "public RSA key", "a", ask, 0666);
525 if(!rsa_write_pem_public_key(key, f)) {
526 fprintf(stderr, "Error writing public key!\n");
549 bool recvline(int fd, char *line, size_t len) {
550 char *newline = NULL;
556 while(!(newline = memchr(buffer, '\n', blen))) {
557 int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
559 if(result == -1 && sockerrno == EINTR) {
561 } else if(result <= 0) {
568 if(newline - buffer >= len) {
572 len = newline - buffer;
574 memcpy(line, buffer, len);
576 memmove(buffer, newline + 1, blen - len - 1);
582 bool recvdata(int fd, char *data, size_t len) {
588 int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
590 if(result == -1 && sockerrno == EINTR) {
592 } else if(result <= 0) {
599 memcpy(data, buffer, len);
600 memmove(buffer, buffer + len, blen - len);
606 bool sendline(int fd, char *format, ...) {
607 static char buffer[4096];
612 va_start(ap, format);
613 blen = vsnprintf(buffer, sizeof(buffer), format, ap);
614 buffer[sizeof(buffer) - 1] = 0;
617 if(blen < 1 || blen >= sizeof(buffer)) {
625 int result = send(fd, p, blen, MSG_NOSIGNAL);
627 if(result == -1 && sockerrno == EINTR) {
629 } else if(result <= 0) {
640 static void pcap(int fd, FILE *out, int snaplen) {
641 sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
649 uint32_t tz_accuracy;
656 snaplen ? : sizeof(data),
669 fwrite(&header, sizeof(header), 1, out);
674 while(recvline(fd, line, sizeof(line))) {
676 int n = sscanf(line, "%d %d %d", &code, &req, &len);
677 gettimeofday(&tv, NULL);
679 if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof(data)) {
683 if(!recvdata(fd, data, len)) {
687 packet.tv_sec = tv.tv_sec;
688 packet.tv_usec = tv.tv_usec;
690 packet.origlen = len;
691 fwrite(&packet, sizeof(packet), 1, out);
692 fwrite(data, len, 1, out);
697 static void logcontrol(int fd, FILE *out, int level) {
698 sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
702 while(recvline(fd, line, sizeof(line))) {
704 int n = sscanf(line, "%d %d %d", &code, &req, &len);
706 if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof(data)) {
710 if(!recvdata(fd, data, len)) {
714 fwrite(data, len, 1, out);
721 static bool remove_service(void) {
722 SC_HANDLE manager = NULL;
723 SC_HANDLE service = NULL;
724 SERVICE_STATUS status = {0};
725 bool success = false;
727 manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
730 fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
734 service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
737 fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
741 if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
742 fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
744 fprintf(stderr, "%s service stopped\n", identname);
747 if(!DeleteService(service)) {
748 fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
757 CloseServiceHandle(service);
761 CloseServiceHandle(manager);
765 fprintf(stderr, "%s service removed\n", identname);
772 bool connect_tincd(bool verbose) {
777 struct timeval tv = {0, 0};
779 if(select(fd + 1, &r, NULL, NULL, &tv)) {
780 fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
788 FILE *f = fopen(pidfilename, "r");
792 fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
801 if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
803 fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
814 if((pid == 0) || (kill(pid, 0) && (errno == ESRCH))) {
815 fprintf(stderr, "Could not find tincd running at pid %d\n", pid);
816 /* clean up the stale socket and pid file */
818 unlink(unixsocketname);
822 struct sockaddr_un sa;
824 sa.sun_family = AF_UNIX;
826 strncpy(sa.sun_path, unixsocketname, sizeof(sa.sun_path));
828 fd = socket(AF_UNIX, SOCK_STREAM, 0);
832 fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
838 if(connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
840 fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
849 struct addrinfo hints = {
850 .ai_family = AF_UNSPEC,
851 .ai_socktype = SOCK_STREAM,
852 .ai_protocol = IPPROTO_TCP,
856 struct addrinfo *res = NULL;
858 if(getaddrinfo(host, port, &hints, &res) || !res) {
860 fprintf(stderr, "Cannot resolve %s port %s: %s\n", host, port, sockstrerror(sockerrno));
866 fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
870 fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
877 unsigned long arg = 0;
879 if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
881 fprintf(stderr, "System call `%s' failed: %s\n", "ioctlsocket", sockstrerror(sockerrno));
887 if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
889 fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
901 static const int one = 1;
902 setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof(one));
908 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %4095s %d", &code, data, &version) != 3 || code != 0) {
910 fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
918 sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
920 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
922 fprintf(stderr, "Could not fully establish control socket connection\n");
934 static int cmd_start(int argc, char *argv[]) {
935 if(connect_tincd(false)) {
937 fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
939 fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
946 char *slash = strrchr(program_name, '/');
950 if((c = strrchr(program_name, '\\')) > slash) {
957 xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
963 char **nargv = xzalloc((optind + argc) * sizeof(*nargv));
968 Windows has no real concept of an "argv array". A command line is just one string.
969 The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
970 it uses quotes to handle spaces in arguments.
971 Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
972 If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
973 into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
975 xasprintf(&arg0, "\"%s\"", arg0);
977 nargv[nargc++] = arg0;
979 for(int i = 1; i < optind; i++) {
980 nargv[nargc++] = orig_argv[i];
983 for(int i = 1; i < argc; i++) {
984 nargv[nargc++] = argv[i];
988 int status = spawnvp(_P_WAIT, c, nargv);
991 fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
997 int pfd[2] = {-1, -1};
999 if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
1000 fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
1008 fprintf(stderr, "Could not fork: %s\n", strerror(errno));
1016 snprintf(buf, sizeof(buf), "%d", pfd[1]);
1017 setenv("TINC_UMBILICAL", buf, true);
1018 exit(execvp(c, nargv));
1025 int status = -1, result;
1027 signal(SIGINT, SIG_IGN);
1030 // Pass all log messages from the umbilical to stderr.
1031 // A nul-byte right before closure means tincd started successfully.
1032 bool failure = true;
1036 while((len = read(pfd[0], buf, sizeof(buf))) > 0) {
1037 failure = buf[len - 1];
1052 // Make sure the child process is really gone.
1053 result = waitpid(pid, &status, 0);
1056 signal(SIGINT, SIG_DFL);
1059 if(failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
1060 fprintf(stderr, "Error starting %s\n", c);
1068 static int cmd_stop(int argc, char *argv[]) {
1070 fprintf(stderr, "Too many arguments!\n");
1076 if(!connect_tincd(true)) {
1078 if(kill(pid, SIGTERM)) {
1079 fprintf(stderr, "Could not send TERM signal to process with PID %d: %s\n", pid, strerror(errno));
1083 fprintf(stderr, "Sent TERM signal to process with PID %d.\n", pid);
1084 waitpid(pid, NULL, 0);
1091 sendline(fd, "%d %d", CONTROL, REQ_STOP);
1093 while(recvline(fd, line, sizeof(line))) {
1094 // Wait for tincd to close the connection...
1099 if(!remove_service()) {
1111 static int cmd_restart(int argc, char *argv[]) {
1113 return cmd_start(argc, argv);
1116 static int cmd_reload(int argc, char *argv[]) {
1118 fprintf(stderr, "Too many arguments!\n");
1122 if(!connect_tincd(true)) {
1126 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1128 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
1129 fprintf(stderr, "Could not reload configuration.\n");
1137 static int dump_invitations(void) {
1138 char dname[PATH_MAX];
1139 snprintf(dname, sizeof(dname), "%s" SLASH "invitations", confbase);
1140 DIR *dir = opendir(dname);
1143 if(errno == ENOENT) {
1144 fprintf(stderr, "No outstanding invitations.\n");
1148 fprintf(stderr, "Cannot not read directory %s: %s\n", dname, strerror(errno));
1156 while((ent = readdir(dir))) {
1157 char buf[MAX_STRING_SIZE];
1159 if(b64decode(ent->d_name, buf, 24) != 18) {
1163 char fname[PATH_MAX];
1164 snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ent->d_name);
1165 FILE *f = fopen(fname, "r");
1168 fprintf(stderr, "Cannot open %s: %s\n", fname, strerror(errno));
1174 if(!fgets(buf, sizeof(buf), f)) {
1175 fprintf(stderr, "Invalid invitation file %s\n", fname);
1182 char *eol = buf + strlen(buf);
1184 while(strchr("\t \r\n", *--eol)) {
1188 if(strncmp(buf, "Name = ", 7) || !check_id(buf + 7)) {
1189 fprintf(stderr, "Invalid invitation file %s\n", fname);
1194 printf("%s %s\n", ent->d_name, buf + 7);
1200 fprintf(stderr, "No outstanding invitations.\n");
1206 static int cmd_dump(int argc, char *argv[]) {
1207 bool only_reachable = false;
1209 if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
1210 if(strcasecmp(argv[2], "nodes")) {
1211 fprintf(stderr, "`reachable' only supported for nodes.\n");
1216 only_reachable = true;
1222 fprintf(stderr, "Invalid number of arguments.\n");
1227 if(!strcasecmp(argv[1], "invitations")) {
1228 return dump_invitations();
1231 if(!connect_tincd(true)) {
1237 if(!strcasecmp(argv[1], "nodes")) {
1238 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1239 } else if(!strcasecmp(argv[1], "edges")) {
1240 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1241 } else if(!strcasecmp(argv[1], "subnets")) {
1242 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
1243 } else if(!strcasecmp(argv[1], "connections")) {
1244 sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
1245 } else if(!strcasecmp(argv[1], "graph")) {
1246 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1247 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1249 } else if(!strcasecmp(argv[1], "digraph")) {
1250 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1251 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1254 fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
1260 printf("graph {\n");
1261 } else if(do_graph == 2) {
1262 printf("digraph {\n");
1265 while(recvline(fd, line, sizeof(line))) {
1266 char node1[4096], node2[4096];
1267 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, node1, node2);
1270 if(do_graph && req == REQ_DUMP_NODES) {
1292 char local_host[4096];
1293 char local_port[4096];
1296 int cipher, digest, maclength, compression, distance, socket, weight;
1297 short int pmtu, minmtu, maxmtu;
1298 unsigned int options, status_int;
1299 node_status_t status;
1300 long int last_state_change;
1303 case REQ_DUMP_NODES: {
1304 int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %d %d %d %d %x %x %4095s %4095s %d %hd %hd %hd %ld", node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
1307 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1311 memcpy(&status, &status_int, sizeof(status));
1314 const char *color = "black";
1316 if(!strcmp(host, "MYSELF")) {
1318 } else if(!status.reachable) {
1320 } else if(strcmp(via, node)) {
1322 } else if(!status.validkey) {
1324 } else if(minmtu > 0) {
1328 printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1330 if(only_reachable && !status.reachable) {
1334 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)\n",
1335 node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
1340 case REQ_DUMP_EDGES: {
1341 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);
1344 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1349 float w = 1 + 65536.0 / weight;
1351 if(do_graph == 1 && strcmp(node1, node2) > 0) {
1352 printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
1353 } else if(do_graph == 2) {
1354 printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
1357 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);
1362 case REQ_DUMP_SUBNETS: {
1363 int n = sscanf(line, "%*d %*d %4095s %4095s", subnet, node);
1366 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1370 printf("%s owner %s\n", strip_weight(subnet), node);
1374 case REQ_DUMP_CONNECTIONS: {
1375 int n = sscanf(line, "%*d %*d %4095s %4095s port %4095s %x %d %x", node, host, port, &options, &socket, &status_int);
1378 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1382 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
1387 fprintf(stderr, "Unable to parse dump from tincd.\n");
1392 fprintf(stderr, "Error receiving dump.\n");
1396 static int cmd_purge(int argc, char *argv[]) {
1398 fprintf(stderr, "Too many arguments!\n");
1402 if(!connect_tincd(true)) {
1406 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1408 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1409 fprintf(stderr, "Could not purge old information.\n");
1416 static int cmd_debug(int argc, char *argv[]) {
1418 fprintf(stderr, "Invalid number of arguments.\n");
1422 if(!connect_tincd(true)) {
1426 int debuglevel = atoi(argv[1]);
1429 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1431 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1432 fprintf(stderr, "Could not set debug level.\n");
1436 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1440 static int cmd_retry(int argc, char *argv[]) {
1442 fprintf(stderr, "Too many arguments!\n");
1446 if(!connect_tincd(true)) {
1450 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1452 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1453 fprintf(stderr, "Could not retry outgoing connections.\n");
1460 static int cmd_connect(int argc, char *argv[]) {
1462 fprintf(stderr, "Invalid number of arguments.\n");
1466 if(!check_id(argv[1])) {
1467 fprintf(stderr, "Invalid name for node.\n");
1471 if(!connect_tincd(true)) {
1475 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1477 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1478 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1485 static int cmd_disconnect(int argc, char *argv[]) {
1487 fprintf(stderr, "Invalid number of arguments.\n");
1491 if(!check_id(argv[1])) {
1492 fprintf(stderr, "Invalid name for node.\n");
1496 if(!connect_tincd(true)) {
1500 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1502 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1503 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1510 static int cmd_top(int argc, char *argv[]) {
1512 fprintf(stderr, "Too many arguments!\n");
1518 if(!connect_tincd(true)) {
1525 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1530 static int cmd_pcap(int argc, char *argv[]) {
1532 fprintf(stderr, "Too many arguments!\n");
1536 if(!connect_tincd(true)) {
1540 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1545 static void sigint_handler(int sig) {
1546 fprintf(stderr, "\n");
1547 shutdown(fd, SHUT_RDWR);
1551 static int cmd_log(int argc, char *argv[]) {
1553 fprintf(stderr, "Too many arguments!\n");
1557 if(!connect_tincd(true)) {
1562 signal(SIGINT, sigint_handler);
1565 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1568 signal(SIGINT, SIG_DFL);
1576 static int cmd_pid(int argc, char *argv[]) {
1578 fprintf(stderr, "Too many arguments!\n");
1582 if(!connect_tincd(true) || !pid) {
1586 printf("%d\n", pid);
1590 int rstrip(char *value) {
1591 int len = strlen(value);
1593 while(len && strchr("\t\r\n ", value[len - 1])) {
1600 char *get_my_name(bool verbose) {
1601 FILE *f = fopen(tinc_conf, "r");
1605 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1614 while(fgets(buf, sizeof(buf), f)) {
1615 int len = strcspn(buf, "\t =");
1617 value += strspn(value, "\t ");
1621 value += strspn(value, "\t ");
1624 if(!rstrip(value)) {
1630 if(strcasecmp(buf, "Name")) {
1636 return replace_name(value);
1643 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1649 ecdsa_t *get_pubkey(FILE *f) {
1653 while(fgets(buf, sizeof(buf), f)) {
1654 int len = strcspn(buf, "\t =");
1656 value += strspn(value, "\t ");
1660 value += strspn(value, "\t ");
1663 if(!rstrip(value)) {
1669 if(strcasecmp(buf, "Ed25519PublicKey")) {
1674 return ecdsa_set_base64_public_key(value);
1681 const var_t variables[] = {
1682 /* Server configuration */
1683 {"AddressFamily", VAR_SERVER},
1684 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1685 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1686 {"BindToInterface", VAR_SERVER},
1687 {"Broadcast", VAR_SERVER | VAR_SAFE},
1688 {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1689 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1690 {"DecrementTTL", VAR_SERVER},
1691 {"Device", VAR_SERVER},
1692 {"DeviceStandby", VAR_SERVER},
1693 {"DeviceType", VAR_SERVER},
1694 {"DirectOnly", VAR_SERVER},
1695 {"Ed25519PrivateKeyFile", VAR_SERVER},
1696 {"ExperimentalProtocol", VAR_SERVER},
1697 {"Forwarding", VAR_SERVER},
1698 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1699 {"Hostnames", VAR_SERVER},
1700 {"IffOneQueue", VAR_SERVER},
1701 {"Interface", VAR_SERVER},
1702 {"InvitationExpire", VAR_SERVER},
1703 {"KeyExpire", VAR_SERVER},
1704 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1705 {"LocalDiscovery", VAR_SERVER},
1706 {"LogLevel", VAR_SERVER},
1707 {"MACExpire", VAR_SERVER},
1708 {"MaxConnectionBurst", VAR_SERVER},
1709 {"MaxOutputBufferSize", VAR_SERVER},
1710 {"MaxTimeout", VAR_SERVER},
1711 {"Mode", VAR_SERVER | VAR_SAFE},
1712 {"Name", VAR_SERVER},
1713 {"PingInterval", VAR_SERVER},
1714 {"PingTimeout", VAR_SERVER},
1715 {"PriorityInheritance", VAR_SERVER},
1716 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1717 {"PrivateKeyFile", VAR_SERVER},
1718 {"ProcessPriority", VAR_SERVER},
1719 {"Proxy", VAR_SERVER},
1720 {"ReplayWindow", VAR_SERVER},
1721 {"ScriptsExtension", VAR_SERVER},
1722 {"ScriptsInterpreter", VAR_SERVER},
1723 {"StrictSubnets", VAR_SERVER},
1724 {"TunnelServer", VAR_SERVER},
1725 {"UDPDiscovery", VAR_SERVER},
1726 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
1727 {"UDPDiscoveryInterval", VAR_SERVER},
1728 {"UDPDiscoveryTimeout", VAR_SERVER},
1729 {"MTUInfoInterval", VAR_SERVER},
1730 {"UDPInfoInterval", VAR_SERVER},
1731 {"UDPRcvBuf", VAR_SERVER},
1732 {"UDPSndBuf", VAR_SERVER},
1733 {"UPnP", VAR_SERVER},
1734 {"UPnPDiscoverWait", VAR_SERVER},
1735 {"UPnPRefreshPeriod", VAR_SERVER},
1736 {"VDEGroup", VAR_SERVER},
1737 {"VDEPort", VAR_SERVER},
1738 /* Host configuration */
1739 {"Address", VAR_HOST | VAR_MULTIPLE},
1740 {"Cipher", VAR_SERVER | VAR_HOST},
1741 {"ClampMSS", VAR_SERVER | VAR_HOST},
1742 {"Compression", VAR_SERVER | VAR_HOST},
1743 {"Digest", VAR_SERVER | VAR_HOST},
1744 {"Ed25519PublicKey", VAR_HOST},
1745 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1746 {"IndirectData", VAR_SERVER | VAR_HOST},
1747 {"MACLength", VAR_SERVER | VAR_HOST},
1748 {"PMTU", VAR_SERVER | VAR_HOST},
1749 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1751 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1752 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1753 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1754 {"TCPOnly", VAR_SERVER | VAR_HOST},
1755 {"Weight", VAR_HOST | VAR_SAFE},
1759 static int cmd_config(int argc, char *argv[]) {
1761 fprintf(stderr, "Invalid number of arguments.\n");
1765 if(strcasecmp(argv[0], "config")) {
1771 if(!strcasecmp(argv[1], "get")) {
1773 } else if(!strcasecmp(argv[1], "add")) {
1774 argv++, argc--, action = 1;
1775 } else if(!strcasecmp(argv[1], "del")) {
1776 argv++, argc--, action = -1;
1777 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1778 argv++, argc--, action = 0;
1782 fprintf(stderr, "Invalid number of arguments.\n");
1786 // Concatenate the rest of the command line
1787 strncpy(line, argv[1], sizeof(line) - 1);
1789 for(int i = 2; i < argc; i++) {
1790 strncat(line, " ", sizeof(line) - 1 - strlen(line));
1791 strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
1794 // Liberal parsing into node name, variable name and value.
1800 len = strcspn(line, "\t =");
1802 value += strspn(value, "\t ");
1806 value += strspn(value, "\t ");
1810 variable = strchr(line, '.');
1820 fprintf(stderr, "No variable given.\n");
1824 if(action >= 0 && !*value) {
1825 fprintf(stderr, "No value for variable given.\n");
1829 if(action < -1 && *value) {
1833 /* Some simple checks. */
1835 bool warnonremove = false;
1837 for(int i = 0; variables[i].name; i++) {
1838 if(strcasecmp(variables[i].name, variable)) {
1843 variable = (char *)variables[i].name;
1845 /* Discourage use of obsolete variables. */
1847 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1849 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1851 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1856 /* Don't put server variables in host config files */
1858 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1860 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1862 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1867 /* Should this go into our own host config file? */
1869 if(!node && !(variables[i].type & VAR_SERVER)) {
1870 node = get_my_name(true);
1877 /* Change "add" into "set" for variables that do not allow multiple occurrences.
1878 Turn on warnings when it seems variables might be removed unintentionally. */
1880 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1881 warnonremove = true;
1883 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1884 warnonremove = true;
1890 if(node && !check_id(node)) {
1891 fprintf(stderr, "Invalid name for node.\n");
1896 if(force || action < 0) {
1897 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1899 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1904 // Open the right configuration file.
1905 char filename[PATH_MAX];
1908 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
1910 snprintf(filename, sizeof(filename), "%s", tinc_conf);
1913 FILE *f = fopen(filename, "r");
1916 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1920 char tmpfile[PATH_MAX];
1924 snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename);
1925 tf = fopen(tmpfile, "w");
1928 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1934 // Copy the file, making modifications on the fly, unless we are just getting a value.
1938 bool removed = false;
1941 while(fgets(buf1, sizeof(buf1), f)) {
1942 buf1[sizeof(buf1) - 1] = 0;
1943 strncpy(buf2, buf1, sizeof(buf2));
1945 // Parse line in a simple way
1949 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(char *name) {
2127 fprintf(stderr, "Warning: could not bind to port 655. ");
2129 for(int i = 0; i < 100; i++) {
2130 int port = 0x1000 + (rand() & 0x7fff);
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 int 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
2268 fprintf(stderr, "Too many arguments!\n");
2273 name = get_my_name(false);
2276 #ifndef DISABLE_LEGACY
2278 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
2284 if(!ed25519_keygen(true)) {
2291 #ifndef DISABLE_LEGACY
2292 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
2294 fprintf(stderr, "Too many arguments!\n");
2299 name = get_my_name(false);
2302 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
2306 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
2308 fprintf(stderr, "Too many arguments!\n");
2313 name = get_my_name(false);
2316 return !ed25519_keygen(true);
2319 static int cmd_help(int argc, char *argv[]) {
2324 static int cmd_version(int argc, char *argv[]) {
2326 fprintf(stderr, "Too many arguments!\n");
2334 static int cmd_info(int argc, char *argv[]) {
2336 fprintf(stderr, "Invalid number of arguments.\n");
2340 if(!connect_tincd(true)) {
2344 return info(fd, argv[1]);
2347 static const char *conffiles[] = {
2358 static int cmd_edit(int argc, char *argv[]) {
2360 fprintf(stderr, "Invalid number of arguments.\n");
2364 char filename[PATH_MAX] = "";
2366 if(strncmp(argv[1], "hosts" SLASH, 6)) {
2367 for(int i = 0; conffiles[i]; i++) {
2368 if(!strcmp(argv[1], conffiles[i])) {
2369 snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
2378 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
2379 char *dash = strchr(argv[1], '-');
2384 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
2385 fprintf(stderr, "Invalid configuration filename.\n");
2393 xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ? : getenv("EDITOR") ? : "vi", filename);
2395 xasprintf(&command, "edit \"%s\"", filename);
2397 int result = system(command);
2404 // Silently try notifying a running tincd of changes.
2405 if(connect_tincd(false)) {
2406 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2412 static int export(const char *name, FILE *out) {
2413 char filename[PATH_MAX];
2414 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2415 FILE *in = fopen(filename, "r");
2418 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
2422 fprintf(out, "Name = %s\n", name);
2425 while(fgets(buf, sizeof(buf), in)) {
2426 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
2432 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2441 static int cmd_export(int argc, char *argv[]) {
2443 fprintf(stderr, "Too many arguments!\n");
2447 char *name = get_my_name(true);
2453 int result = export(name, stdout);
2463 static int cmd_export_all(int argc, char *argv[]) {
2465 fprintf(stderr, "Too many arguments!\n");
2469 DIR *dir = opendir(hosts_dir);
2472 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2480 while((ent = readdir(dir))) {
2481 if(!check_id(ent->d_name)) {
2488 printf("#---------------------------------------------------------------#\n");
2491 result |= export(ent->d_name, stdout);
2503 static int cmd_import(int argc, char *argv[]) {
2505 fprintf(stderr, "Too many arguments!\n");
2514 char filename[PATH_MAX] = "";
2516 bool firstline = true;
2518 while(fgets(buf, sizeof(buf), in)) {
2519 if(sscanf(buf, "Name = %4095s", name) == 1) {
2522 if(!check_id(name)) {
2523 fprintf(stderr, "Invalid Name in input!\n");
2531 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2533 if(!force && !access(filename, F_OK)) {
2534 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2539 out = fopen(filename, "w");
2542 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2548 } else if(firstline) {
2549 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2554 if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
2559 if(fputs(buf, out) < 0) {
2560 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2571 fprintf(stderr, "Imported %d host configuration files.\n", count);
2574 fprintf(stderr, "No host configuration files imported.\n");
2579 static int cmd_exchange(int argc, char *argv[]) {
2580 return cmd_export(argc, argv) ? : cmd_import(argc, argv);
2583 static int cmd_exchange_all(int argc, char *argv[]) {
2584 return cmd_export_all(argc, argv) ? : cmd_import(argc, argv);
2587 static int switch_network(char *name) {
2588 if(strcmp(name, ".")) {
2589 if(!check_netname(name, false)) {
2590 fprintf(stderr, "Invalid character in netname!\n");
2594 if(!check_netname(name, true)) {
2595 fprintf(stderr, "Warning: unsafe character in netname!\n");
2605 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2612 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2613 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2614 xasprintf(&prompt, "%s> ", identname);
2619 static int cmd_network(int argc, char *argv[]) {
2621 fprintf(stderr, "Too many arguments!\n");
2626 return switch_network(argv[1]);
2629 DIR *dir = opendir(confdir);
2632 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2638 while((ent = readdir(dir))) {
2639 if(*ent->d_name == '.') {
2643 if(!strcmp(ent->d_name, "tinc.conf")) {
2648 char fname[PATH_MAX];
2649 snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
2651 if(!access(fname, R_OK)) {
2652 printf("%s\n", ent->d_name);
2661 static int cmd_fsck(int argc, char *argv[]) {
2663 fprintf(stderr, "Too many arguments!\n");
2667 return fsck(orig_argv[0]);
2670 static void *readfile(FILE *in, size_t *len) {
2672 size_t alloced = 4096;
2673 char *buf = xmalloc(alloced);
2676 size_t read = fread(buf + count, 1, alloced - count, in);
2684 if(count >= alloced) {
2686 buf = xrealloc(buf, alloced);
2697 static int cmd_sign(int argc, char *argv[]) {
2699 fprintf(stderr, "Too many arguments!\n");
2704 name = get_my_name(true);
2711 char fname[PATH_MAX];
2712 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
2713 FILE *fp = fopen(fname, "r");
2716 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2720 ecdsa_t *key = ecdsa_read_pem_private_key(fp);
2723 fprintf(stderr, "Could not read private key from %s\n", fname);
2733 in = fopen(argv[1], "rb");
2736 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
2745 char *data = readfile(in, &len);
2752 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2757 // Ensure we sign our name and current time as well
2758 long t = time(NULL);
2760 xasprintf(&trailer, " %s %ld", name, t);
2761 int trailer_len = strlen(trailer);
2763 data = xrealloc(data, len + trailer_len);
2764 memcpy(data + len, trailer, trailer_len);
2769 if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
2770 fprintf(stderr, "Error generating signature\n");
2776 b64encode(sig, sig, 64);
2779 fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
2780 fwrite(data, len, 1, stdout);
2786 static int cmd_verify(int argc, char *argv[]) {
2788 fprintf(stderr, "Not enough arguments!\n");
2793 fprintf(stderr, "Too many arguments!\n");
2797 char *node = argv[1];
2799 if(!strcmp(node, ".")) {
2801 name = get_my_name(true);
2809 } else if(!strcmp(node, "*")) {
2812 if(!check_id(node)) {
2813 fprintf(stderr, "Invalid node name\n");
2821 in = fopen(argv[2], "rb");
2824 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
2832 char *data = readfile(in, &len);
2839 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2843 char *newline = memchr(data, '\n', len);
2845 if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
2846 fprintf(stderr, "Invalid input\n");
2852 size_t skip = newline - data;
2854 char signer[MAX_STRING_SIZE] = "";
2855 char sig[MAX_STRING_SIZE] = "";
2858 if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
2859 fprintf(stderr, "Invalid input\n");
2864 if(node && strcmp(node, signer)) {
2865 fprintf(stderr, "Signature is not made by %s\n", node);
2875 xasprintf(&trailer, " %s %ld", signer, t);
2876 int trailer_len = strlen(trailer);
2878 data = xrealloc(data, len + trailer_len);
2879 memcpy(data + len, trailer, trailer_len);
2882 newline = data + skip;
2884 char fname[PATH_MAX];
2885 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
2886 FILE *fp = fopen(fname, "r");
2889 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2894 ecdsa_t *key = get_pubkey(fp);
2898 key = ecdsa_read_pem_public_key(fp);
2902 fprintf(stderr, "Could not read public key from %s\n", fname);
2910 if(b64decode(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
2911 fprintf(stderr, "Invalid signature\n");
2919 fwrite(newline, len - (newline - data), 1, stdout);
2925 static const struct {
2926 const char *command;
2927 int (*function)(int argc, char *argv[]);
2930 {"start", cmd_start},
2932 {"restart", cmd_restart},
2933 {"reload", cmd_reload},
2936 {"purge", cmd_purge},
2937 {"debug", cmd_debug},
2938 {"retry", cmd_retry},
2939 {"connect", cmd_connect},
2940 {"disconnect", cmd_disconnect},
2945 {"config", cmd_config, true},
2946 {"add", cmd_config},
2947 {"del", cmd_config},
2948 {"get", cmd_config},
2949 {"set", cmd_config},
2951 {"generate-keys", cmd_generate_keys},
2952 #ifndef DISABLE_LEGACY
2953 {"generate-rsa-keys", cmd_generate_rsa_keys},
2955 {"generate-ed25519-keys", cmd_generate_ed25519_keys},
2957 {"version", cmd_version},
2960 {"export", cmd_export},
2961 {"export-all", cmd_export_all},
2962 {"import", cmd_import},
2963 {"exchange", cmd_exchange},
2964 {"exchange-all", cmd_exchange_all},
2965 {"invite", cmd_invite},
2967 {"network", cmd_network},
2970 {"verify", cmd_verify},
2974 #ifdef HAVE_READLINE
2975 static char *complete_command(const char *text, int state) {
2984 while(commands[i].command) {
2985 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
2986 return xstrdup(commands[i].command);
2995 static char *complete_dump(const char *text, int state) {
2996 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
3006 if(!strncasecmp(matches[i], text, strlen(text))) {
3007 return xstrdup(matches[i]);
3016 static char *complete_config(const char *text, int state) {
3025 while(variables[i].name) {
3026 char *dot = strchr(text, '.');
3029 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
3031 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
3035 if(!strncasecmp(variables[i].name, text, strlen(text))) {
3036 return xstrdup(variables[i].name);
3046 static char *complete_info(const char *text, int state) {
3052 if(!connect_tincd(false)) {
3056 // Check the list of nodes
3057 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
3058 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
3061 while(recvline(fd, line, sizeof(line))) {
3063 int n = sscanf(line, "%d %d %4095s", &code, &req, item);
3076 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
3080 if(!strncmp(item, text, strlen(text))) {
3081 return xstrdup(strip_weight(item));
3088 static char *complete_nothing(const char *text, int state) {
3092 static char **completion(const char *text, int start, int end) {
3093 char **matches = NULL;
3096 matches = rl_completion_matches(text, complete_command);
3097 } else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
3098 matches = rl_completion_matches(text, complete_dump);
3099 } else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
3100 matches = rl_completion_matches(text, complete_config);
3101 } else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
3102 matches = rl_completion_matches(text, complete_config);
3103 } else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
3104 matches = rl_completion_matches(text, complete_config);
3105 } else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
3106 matches = rl_completion_matches(text, complete_config);
3107 } else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
3108 matches = rl_completion_matches(text, complete_info);
3115 static int cmd_shell(int argc, char *argv[]) {
3116 xasprintf(&prompt, "%s> ", identname);
3120 int maxargs = argc + 16;
3121 char **nargv = xmalloc(maxargs * sizeof(*nargv));
3123 for(int i = 0; i < argc; i++) {
3127 #ifdef HAVE_READLINE
3128 rl_readline_name = "tinc";
3129 rl_completion_entry_function = complete_nothing;
3130 rl_attempted_completion_function = completion;
3131 rl_filename_completion_desired = 0;
3136 #ifdef HAVE_READLINE
3141 rl_basic_word_break_characters = "\t\n ";
3142 line = readline(prompt);
3145 copy = xstrdup(line);
3148 line = fgets(buf, sizeof(buf), stdin);
3154 fputs(prompt, stdout);
3157 line = fgets(buf, sizeof(buf), stdin);
3164 /* Ignore comments */
3173 char *p = line + strspn(line, " \t\n");
3174 char *next = strtok(p, " \t\n");
3177 if(nargc >= maxargs) {
3179 nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
3184 next = strtok(NULL, " \t\n");
3191 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
3198 for(int i = 0; commands[i].command; i++) {
3199 if(!strcasecmp(nargv[argc], commands[i].command)) {
3200 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
3206 #ifdef HAVE_READLINE
3215 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
3230 int main(int argc, char *argv[]) {
3231 program_name = argv[0];
3234 tty = isatty(0) && isatty(1);
3236 if(!parse_options(argc, argv)) {
3241 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
3242 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
3255 static struct WSAData wsa_state;
3257 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
3258 fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
3267 if(optind >= argc) {
3268 return cmd_shell(argc, argv);
3271 for(int i = 0; commands[i].command; i++) {
3272 if(!strcasecmp(argv[optind], commands[i].command)) {
3273 return commands[i].function(argc - optind, argv + optind);
3277 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);