2 tincctl.c -- Controlling a running tincd
3 Copyright (C) 2007-2018 Guus Sliepen <guus@tinc-vpn.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include "readline/readline.h"
26 #include "readline/history.h"
31 #include "control_common.h"
36 #include "invitation.h"
45 #define MSG_NOSIGNAL 0
48 static char **orig_argv;
51 /* If nonzero, display usage information and exit. */
52 static bool show_help = false;
54 /* If nonzero, print the version on standard output and exit. */
55 static bool show_version = false;
57 static char *name = NULL;
58 static char controlcookie[1025];
59 char *tinc_conf = NULL;
60 char *hosts_dir = NULL;
63 // Horrible global variables...
72 bool confbasegiven = false;
73 bool netnamegiven = false;
74 char *scriptinterpreter = NULL;
75 char *scriptextension = "";
81 static struct option const long_options[] = {
82 {"batch", no_argument, NULL, 'b'},
83 {"config", required_argument, NULL, 'c'},
84 {"net", required_argument, NULL, 'n'},
85 {"help", no_argument, NULL, 1},
86 {"version", no_argument, NULL, 2},
87 {"pidfile", required_argument, NULL, 3},
88 {"force", no_argument, NULL, 4},
92 static void version(void) {
93 printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
94 BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
95 printf("Copyright (C) 1998-2018 Ivo Timmermans, Guus Sliepen and others.\n"
96 "See the AUTHORS file for a complete list.\n\n"
97 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
98 "and you are welcome to redistribute it under certain conditions;\n"
99 "see the file COPYING for details.\n");
102 static void usage(bool status) {
104 fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
106 printf("Usage: %s [options] command\n\n", program_name);
107 printf("Valid options are:\n"
108 " -b, --batch Don't ask for anything (non-interactive mode).\n"
109 " -c, --config=DIR Read configuration options from DIR.\n"
110 " -n, --net=NETNAME Connect to net NETNAME.\n"
111 " --pidfile=FILENAME Read control cookie from FILENAME.\n"
112 " --force Force some commands to work despite warnings.\n"
113 " --help Display this help and exit.\n"
114 " --version Output version information and exit.\n"
116 "Valid commands are:\n"
117 " init [name] Create initial configuration files.\n"
118 " get VARIABLE Print current value of VARIABLE\n"
119 " set VARIABLE VALUE Set VARIABLE to VALUE\n"
120 " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
121 " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
122 " start [tincd options] Start tincd.\n"
123 " stop Stop tincd.\n"
124 " restart [tincd options] Restart tincd.\n"
125 " reload Partially reload configuration of running tincd.\n"
126 " pid Show PID of currently running tincd.\n"
127 #ifdef DISABLE_LEGACY
128 " generate-keys Generate a new Ed25519 public/private keypair.\n"
130 " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
131 " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
133 " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
134 " dump Dump a list of one of the following things:\n"
135 " [reachable] nodes - all known nodes in the VPN\n"
136 " edges - all known connections in the VPN\n"
137 " subnets - all known subnets in the VPN\n"
138 " connections - all meta connections with ourself\n"
139 " [di]graph - graph of the VPN in dotty format\n"
140 " invitations - outstanding invitations\n"
141 " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
142 " purge Purge unreachable nodes\n"
143 " debug N Set debug level\n"
144 " retry Retry all outgoing connections\n"
145 " disconnect NODE Close meta connection with NODE\n"
147 " top Show real-time statistics\n"
149 " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
150 " log [level] Dump log output [up to the specified level]\n"
151 " export Export host configuration of local node to standard output\n"
152 " export-all Export all host configuration files to standard output\n"
153 " import Import host configuration file(s) from standard input\n"
154 " exchange Same as export followed by import\n"
155 " exchange-all Same as export-all followed by import\n"
156 " invite NODE [...] Generate an invitation for NODE\n"
157 " join INVITATION Join a VPN using an INVITATION\n"
158 " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
159 " fsck Check the configuration files for problems.\n"
160 " sign [FILE] Generate a signed version of a file.\n"
161 " verify NODE [FILE] Verify that a file was signed by the given NODE.\n"
163 printf("Report bugs to tinc@tinc-vpn.org.\n");
167 static bool parse_options(int argc, char **argv) {
169 int option_index = 0;
171 while((r = getopt_long(argc, argv, "+bc:n:", long_options, &option_index)) != EOF) {
173 case 0: /* long option */
180 case 'c': /* config file */
181 confbase = xstrdup(optarg);
182 confbasegiven = true;
185 case 'n': /* net name given */
186 netname = xstrdup(optarg);
189 case 1: /* show help */
193 case 2: /* show version */
197 case 3: /* open control socket here */
198 pidfilename = xstrdup(optarg);
205 case '?': /* wrong options */
214 if(!netname && (netname = getenv("NETNAME"))) {
215 netname = xstrdup(netname);
218 /* netname "." is special: a "top-level name" */
220 if(netname && (!*netname || !strcmp(netname, "."))) {
225 if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
226 fprintf(stderr, "Invalid character in netname!\n");
233 /* Open a file with the desired permissions, minus the umask.
234 Also, if we want to create an executable file, we call fchmod()
235 to set the executable bits. */
237 FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
238 mode_t mask = umask(0);
241 FILE *f = fopen(filename, mode);
244 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
250 if((perms & 0444) && f) {
251 fchmod(fileno(f), perms);
259 static void disable_old_keys(const char *filename, const char *what) {
260 char tmpfile[PATH_MAX] = "";
262 bool disabled = false;
267 r = fopen(filename, "r");
273 snprintf(tmpfile, sizeof(tmpfile), "%s.tmp", filename);
275 struct stat st = {.st_mode = 0600};
276 fstat(fileno(r), &st);
277 w = fopenmask(tmpfile, "w", st.st_mode);
279 while(fgets(buf, sizeof(buf), r)) {
280 if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
281 if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
287 bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
294 if(block || ed25519pubkey) {
298 if(fputs(buf, w) < 0) {
304 if(block && !strncmp(buf, "-----END ", 9)) {
314 if(ferror(r) || fclose(r) < 0) {
320 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
330 // We cannot atomically replace files on Windows.
331 char bakfile[PATH_MAX] = "";
332 snprintf(bakfile, sizeof(bakfile), "%s.bak", filename);
334 if(rename(filename, bakfile) || rename(tmpfile, filename)) {
335 rename(bakfile, filename);
338 if(rename(tmpfile, filename)) {
340 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
345 fprintf(stderr, "Warning: old key(s) found and disabled.\n");
352 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
354 char directory[PATH_MAX] = ".";
358 /* Check stdin and stdout */
360 /* Ask for a file and/or directory name. */
361 fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
363 if(fgets(buf, sizeof(buf), stdin) == NULL) {
364 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
368 size_t len = strlen(buf);
381 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
384 if(filename[0] != '/') {
386 /* The directory is a relative path or a filename. */
387 getcwd(directory, sizeof(directory));
388 snprintf(buf2, sizeof(buf2), "%s" SLASH "%s", directory, filename);
392 disable_old_keys(filename, what);
394 /* Open it first to keep the inode busy */
396 r = fopenmask(filename, mode, perms);
399 fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
407 Generate a public/private Ed25519 keypair, and ask for a file to store
410 static bool ed25519_keygen(bool ask) {
413 char fname[PATH_MAX];
415 fprintf(stderr, "Generating Ed25519 keypair:\n");
417 if(!(key = ecdsa_generate())) {
418 fprintf(stderr, "Error during key generation!\n");
421 fprintf(stderr, "Done.\n");
424 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
425 f = ask_and_open(fname, "private Ed25519 key", "a", ask, 0600);
431 if(!ecdsa_write_pem_private_key(key, f)) {
432 fprintf(stderr, "Error writing private key!\n");
439 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
441 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.pub", confbase);
444 f = ask_and_open(fname, "public Ed25519 key", "a", ask, 0666);
450 char *pubkey = ecdsa_get_base64_public_key(key);
451 fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
469 #ifndef DISABLE_LEGACY
471 Generate a public/private RSA keypair, and ask for a file to store
474 static bool rsa_keygen(int bits, bool ask) {
477 char fname[PATH_MAX];
479 // Make sure the key size is a multiple of 8 bits.
482 // Make sure that a valid key size is used.
483 if(bits < 1024 || bits > 8192) {
484 fprintf(stderr, "Invalid key size %d specified! It should be between 1024 and 8192 bits.\n", bits);
486 } else if(bits < 2048) {
487 fprintf(stderr, "WARNING: generating a weak %d bits RSA key! 2048 or more bits are recommended.\n", bits);
490 fprintf(stderr, "Generating %d bits keys:\n", bits);
492 if(!(key = rsa_generate(bits, 0x10001))) {
493 fprintf(stderr, "Error during key generation!\n");
496 fprintf(stderr, "Done.\n");
499 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.priv", confbase);
500 f = ask_and_open(fname, "private RSA key", "a", ask, 0600);
506 if(!rsa_write_pem_private_key(key, f)) {
507 fprintf(stderr, "Error writing private key!\n");
514 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, name);
516 snprintf(fname, sizeof(fname), "%s" SLASH "rsa_key.pub", confbase);
519 f = ask_and_open(fname, "public RSA key", "a", ask, 0666);
525 if(!rsa_write_pem_public_key(key, f)) {
526 fprintf(stderr, "Error writing public key!\n");
549 bool recvline(int fd, char *line, size_t len) {
550 char *newline = NULL;
556 while(!(newline = memchr(buffer, '\n', blen))) {
557 int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
559 if(result == -1 && sockerrno == EINTR) {
561 } else if(result <= 0) {
568 if(newline - buffer >= len) {
572 len = newline - buffer;
574 memcpy(line, buffer, len);
576 memmove(buffer, newline + 1, blen - len - 1);
582 bool recvdata(int fd, char *data, size_t len) {
588 int result = recv(fd, buffer + blen, sizeof(buffer) - blen, 0);
590 if(result == -1 && sockerrno == EINTR) {
592 } else if(result <= 0) {
599 memcpy(data, buffer, len);
600 memmove(buffer, buffer + len, blen - len);
606 bool sendline(int fd, char *format, ...) {
607 static char buffer[4096];
612 va_start(ap, format);
613 blen = vsnprintf(buffer, sizeof(buffer), format, ap);
614 buffer[sizeof(buffer) - 1] = 0;
617 if(blen < 1 || blen >= sizeof(buffer)) {
625 int result = send(fd, p, blen, MSG_NOSIGNAL);
627 if(result == -1 && sockerrno == EINTR) {
629 } else if(result <= 0) {
640 static void pcap(int fd, FILE *out, int snaplen) {
641 sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
649 uint32_t tz_accuracy;
656 snaplen ? : sizeof(data),
669 fwrite(&header, sizeof(header), 1, out);
674 while(recvline(fd, line, sizeof(line))) {
676 int n = sscanf(line, "%d %d %d", &code, &req, &len);
677 gettimeofday(&tv, NULL);
679 if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof(data)) {
683 if(!recvdata(fd, data, len)) {
687 packet.tv_sec = tv.tv_sec;
688 packet.tv_usec = tv.tv_usec;
690 packet.origlen = len;
691 fwrite(&packet, sizeof(packet), 1, out);
692 fwrite(data, len, 1, out);
697 static void logcontrol(int fd, FILE *out, int level) {
698 sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
702 while(recvline(fd, line, sizeof(line))) {
704 int n = sscanf(line, "%d %d %d", &code, &req, &len);
706 if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof(data)) {
710 if(!recvdata(fd, data, len)) {
714 fwrite(data, len, 1, out);
721 static bool remove_service(void) {
722 SC_HANDLE manager = NULL;
723 SC_HANDLE service = NULL;
724 SERVICE_STATUS status = {0};
725 bool success = false;
727 manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
730 fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
734 service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
737 fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
741 if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
742 fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
744 fprintf(stderr, "%s service stopped\n", identname);
747 if(!DeleteService(service)) {
748 fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
757 CloseServiceHandle(service);
761 CloseServiceHandle(manager);
765 fprintf(stderr, "%s service removed\n", identname);
772 bool connect_tincd(bool verbose) {
777 struct timeval tv = {0, 0};
779 if(select(fd + 1, &r, NULL, NULL, &tv)) {
780 fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
788 FILE *f = fopen(pidfilename, "r");
792 fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
801 if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
803 fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
814 if((pid == 0) || (kill(pid, 0) && (errno == ESRCH))) {
815 fprintf(stderr, "Could not find tincd running at pid %d\n", pid);
816 /* clean up the stale socket and pid file */
818 unlink(unixsocketname);
822 struct sockaddr_un sa;
824 sa.sun_family = AF_UNIX;
826 strncpy(sa.sun_path, unixsocketname, sizeof(sa.sun_path));
828 fd = socket(AF_UNIX, SOCK_STREAM, 0);
832 fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
838 if(connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
840 fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
849 struct addrinfo hints = {
850 .ai_family = AF_UNSPEC,
851 .ai_socktype = SOCK_STREAM,
852 .ai_protocol = IPPROTO_TCP,
856 struct addrinfo *res = NULL;
858 if(getaddrinfo(host, port, &hints, &res) || !res) {
860 fprintf(stderr, "Cannot resolve %s port %s: %s\n", host, port, sockstrerror(sockerrno));
866 fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
870 fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
877 unsigned long arg = 0;
879 if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
881 fprintf(stderr, "System call `%s' failed: %s\n", "ioctlsocket", sockstrerror(sockerrno));
887 if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
889 fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
901 static const int one = 1;
902 setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof(one));
908 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %4095s %d", &code, data, &version) != 3 || code != 0) {
910 fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
918 sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
920 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
922 fprintf(stderr, "Could not fully establish control socket connection\n");
934 static int cmd_start(int argc, char *argv[]) {
935 if(connect_tincd(false)) {
937 fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
939 fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
946 char *slash = strrchr(program_name, '/');
950 if((c = strrchr(program_name, '\\')) > slash) {
957 xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
963 char **nargv = xzalloc((optind + argc) * sizeof(*nargv));
968 Windows has no real concept of an "argv array". A command line is just one string.
969 The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
970 it uses quotes to handle spaces in arguments.
971 Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
972 If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
973 into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
975 xasprintf(&arg0, "\"%s\"", arg0);
977 nargv[nargc++] = arg0;
979 for(int i = 1; i < optind; i++) {
980 nargv[nargc++] = orig_argv[i];
983 for(int i = 1; i < argc; i++) {
984 nargv[nargc++] = argv[i];
988 int status = spawnvp(_P_WAIT, c, nargv);
991 fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
997 int pfd[2] = {-1, -1};
999 if(socketpair(AF_UNIX, SOCK_STREAM, 0, pfd)) {
1000 fprintf(stderr, "Could not create umbilical socket: %s\n", strerror(errno));
1008 fprintf(stderr, "Could not fork: %s\n", strerror(errno));
1016 snprintf(buf, sizeof(buf), "%d", pfd[1]);
1017 setenv("TINC_UMBILICAL", buf, true);
1018 exit(execvp(c, nargv));
1025 int status = -1, result;
1027 signal(SIGINT, SIG_IGN);
1030 // Pass all log messages from the umbilical to stderr.
1031 // A nul-byte right before closure means tincd started successfully.
1032 bool failure = true;
1036 while((len = read(pfd[0], buf, sizeof(buf))) > 0) {
1037 failure = buf[len - 1];
1052 // Make sure the child process is really gone.
1053 result = waitpid(pid, &status, 0);
1056 signal(SIGINT, SIG_DFL);
1059 if(failure || result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
1060 fprintf(stderr, "Error starting %s\n", c);
1068 static int cmd_stop(int argc, char *argv[]) {
1070 fprintf(stderr, "Too many arguments!\n");
1076 if(!connect_tincd(true)) {
1078 if(kill(pid, SIGTERM)) {
1079 fprintf(stderr, "Could not send TERM signal to process with PID %d: %s\n", pid, strerror(errno));
1083 fprintf(stderr, "Sent TERM signal to process with PID %d.\n", pid);
1084 waitpid(pid, NULL, 0);
1091 sendline(fd, "%d %d", CONTROL, REQ_STOP);
1093 while(recvline(fd, line, sizeof(line))) {
1094 // Wait for tincd to close the connection...
1099 if(!remove_service()) {
1111 static int cmd_restart(int argc, char *argv[]) {
1113 return cmd_start(argc, argv);
1116 static int cmd_reload(int argc, char *argv[]) {
1118 fprintf(stderr, "Too many arguments!\n");
1122 if(!connect_tincd(true)) {
1126 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1128 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
1129 fprintf(stderr, "Could not reload configuration.\n");
1137 static int dump_invitations(void) {
1138 char dname[PATH_MAX];
1139 snprintf(dname, sizeof(dname), "%s" SLASH "invitations", confbase);
1140 DIR *dir = opendir(dname);
1143 if(errno == ENOENT) {
1144 fprintf(stderr, "No outstanding invitations.\n");
1148 fprintf(stderr, "Cannot not read directory %s: %s\n", dname, strerror(errno));
1156 while((ent = readdir(dir))) {
1157 char buf[MAX_STRING_SIZE];
1159 if(b64decode(ent->d_name, buf, 24) != 18) {
1163 char fname[PATH_MAX];
1164 snprintf(fname, sizeof(fname), "%s" SLASH "%s", dname, ent->d_name);
1165 FILE *f = fopen(fname, "r");
1168 fprintf(stderr, "Cannot open %s: %s\n", fname, strerror(errno));
1174 if(!fgets(buf, sizeof(buf), f)) {
1175 fprintf(stderr, "Invalid invitation file %s\n", fname);
1182 char *eol = buf + strlen(buf);
1184 while(strchr("\t \r\n", *--eol)) {
1188 if(strncmp(buf, "Name = ", 7) || !check_id(buf + 7)) {
1189 fprintf(stderr, "Invalid invitation file %s\n", fname);
1194 printf("%s %s\n", ent->d_name, buf + 7);
1200 fprintf(stderr, "No outstanding invitations.\n");
1206 static int cmd_dump(int argc, char *argv[]) {
1207 bool only_reachable = false;
1209 if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
1210 if(strcasecmp(argv[2], "nodes")) {
1211 fprintf(stderr, "`reachable' only supported for nodes.\n");
1216 only_reachable = true;
1222 fprintf(stderr, "Invalid number of arguments.\n");
1227 if(!strcasecmp(argv[1], "invitations")) {
1228 return dump_invitations();
1231 if(!connect_tincd(true)) {
1237 if(!strcasecmp(argv[1], "nodes")) {
1238 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1239 } else if(!strcasecmp(argv[1], "edges")) {
1240 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1241 } else if(!strcasecmp(argv[1], "subnets")) {
1242 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
1243 } else if(!strcasecmp(argv[1], "connections")) {
1244 sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
1245 } else if(!strcasecmp(argv[1], "graph")) {
1246 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1247 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1249 } else if(!strcasecmp(argv[1], "digraph")) {
1250 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
1251 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
1254 fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
1260 printf("graph {\n");
1261 } else if(do_graph == 2) {
1262 printf("digraph {\n");
1265 while(recvline(fd, line, sizeof(line))) {
1266 char node1[4096], node2[4096];
1267 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, node1, node2);
1270 if(do_graph && req == REQ_DUMP_NODES) {
1292 char local_host[4096];
1293 char local_port[4096];
1296 int cipher, digest, maclength, compression, distance, socket, weight;
1297 short int pmtu, minmtu, maxmtu;
1298 unsigned int options, status_int;
1299 node_status_t status;
1300 long int last_state_change;
1302 uint64_t in_packets, in_bytes, out_packets, out_bytes;
1305 case REQ_DUMP_NODES: {
1306 int n = sscanf(line, "%*d %*d %4095s %4095s %4095s port %4095s %d %d %d %d %x %x %4095s %4095s %d %hd %hd %hd %ld %d %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change, &udp_ping_rtt, &in_packets, &in_bytes, &out_packets, &out_bytes);
1309 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1313 memcpy(&status, &status_int, sizeof(status));
1316 const char *color = "black";
1318 if(!strcmp(host, "MYSELF")) {
1320 } else if(!status.reachable) {
1322 } else if(strcmp(via, node)) {
1324 } else if(!status.validkey) {
1326 } else if(minmtu > 0) {
1330 printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1332 if(only_reachable && !status.reachable) {
1336 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,
1337 node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu, in_packets, in_bytes, out_packets, out_bytes);
1338 if (udp_ping_rtt != -1)
1339 printf(" rtt %d.%03d", udp_ping_rtt / 1000, udp_ping_rtt % 1000);
1345 case REQ_DUMP_EDGES: {
1346 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);
1349 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1354 float w = 1 + 65536.0 / weight;
1356 if(do_graph == 1 && strcmp(node1, node2) > 0) {
1357 printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
1358 } else if(do_graph == 2) {
1359 printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
1362 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);
1367 case REQ_DUMP_SUBNETS: {
1368 int n = sscanf(line, "%*d %*d %4095s %4095s", subnet, node);
1371 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1375 printf("%s owner %s\n", strip_weight(subnet), node);
1379 case REQ_DUMP_CONNECTIONS: {
1380 int n = sscanf(line, "%*d %*d %4095s %4095s port %4095s %x %d %x", node, host, port, &options, &socket, &status_int);
1383 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1387 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
1392 fprintf(stderr, "Unable to parse dump from tincd.\n");
1397 fprintf(stderr, "Error receiving dump.\n");
1401 static int cmd_purge(int argc, char *argv[]) {
1403 fprintf(stderr, "Too many arguments!\n");
1407 if(!connect_tincd(true)) {
1411 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1413 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1414 fprintf(stderr, "Could not purge old information.\n");
1421 static int cmd_debug(int argc, char *argv[]) {
1423 fprintf(stderr, "Invalid number of arguments.\n");
1427 if(!connect_tincd(true)) {
1431 int debuglevel = atoi(argv[1]);
1434 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1436 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1437 fprintf(stderr, "Could not set debug level.\n");
1441 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1445 static int cmd_retry(int argc, char *argv[]) {
1447 fprintf(stderr, "Too many arguments!\n");
1451 if(!connect_tincd(true)) {
1455 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1457 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1458 fprintf(stderr, "Could not retry outgoing connections.\n");
1465 static int cmd_connect(int argc, char *argv[]) {
1467 fprintf(stderr, "Invalid number of arguments.\n");
1471 if(!check_id(argv[1])) {
1472 fprintf(stderr, "Invalid name for node.\n");
1476 if(!connect_tincd(true)) {
1480 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1482 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1483 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1490 static int cmd_disconnect(int argc, char *argv[]) {
1492 fprintf(stderr, "Invalid number of arguments.\n");
1496 if(!check_id(argv[1])) {
1497 fprintf(stderr, "Invalid name for node.\n");
1501 if(!connect_tincd(true)) {
1505 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1507 if(!recvline(fd, line, sizeof(line)) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1508 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1515 static int cmd_top(int argc, char *argv[]) {
1517 fprintf(stderr, "Too many arguments!\n");
1523 if(!connect_tincd(true)) {
1530 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1535 static int cmd_pcap(int argc, char *argv[]) {
1537 fprintf(stderr, "Too many arguments!\n");
1541 if(!connect_tincd(true)) {
1545 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1550 static void sigint_handler(int sig) {
1551 fprintf(stderr, "\n");
1552 shutdown(fd, SHUT_RDWR);
1556 static int cmd_log(int argc, char *argv[]) {
1558 fprintf(stderr, "Too many arguments!\n");
1562 if(!connect_tincd(true)) {
1567 signal(SIGINT, sigint_handler);
1570 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1573 signal(SIGINT, SIG_DFL);
1581 static int cmd_pid(int argc, char *argv[]) {
1583 fprintf(stderr, "Too many arguments!\n");
1587 if(!connect_tincd(true) || !pid) {
1591 printf("%d\n", pid);
1595 int rstrip(char *value) {
1596 int len = strlen(value);
1598 while(len && strchr("\t\r\n ", value[len - 1])) {
1605 char *get_my_name(bool verbose) {
1606 FILE *f = fopen(tinc_conf, "r");
1610 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1619 while(fgets(buf, sizeof(buf), f)) {
1620 int len = strcspn(buf, "\t =");
1622 value += strspn(value, "\t ");
1626 value += strspn(value, "\t ");
1629 if(!rstrip(value)) {
1635 if(strcasecmp(buf, "Name")) {
1641 return replace_name(value);
1648 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1654 ecdsa_t *get_pubkey(FILE *f) {
1658 while(fgets(buf, sizeof(buf), f)) {
1659 int len = strcspn(buf, "\t =");
1661 value += strspn(value, "\t ");
1665 value += strspn(value, "\t ");
1668 if(!rstrip(value)) {
1674 if(strcasecmp(buf, "Ed25519PublicKey")) {
1679 return ecdsa_set_base64_public_key(value);
1686 const var_t variables[] = {
1687 /* Server configuration */
1688 {"AddressFamily", VAR_SERVER},
1689 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1690 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1691 {"BindToInterface", VAR_SERVER},
1692 {"Broadcast", VAR_SERVER | VAR_SAFE},
1693 {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1694 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1695 {"DecrementTTL", VAR_SERVER},
1696 {"Device", VAR_SERVER},
1697 {"DeviceStandby", VAR_SERVER},
1698 {"DeviceType", VAR_SERVER},
1699 {"DirectOnly", VAR_SERVER},
1700 {"Ed25519PrivateKeyFile", VAR_SERVER},
1701 {"ExperimentalProtocol", VAR_SERVER},
1702 {"Forwarding", VAR_SERVER},
1703 {"FWMark", VAR_SERVER},
1704 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1705 {"Hostnames", VAR_SERVER},
1706 {"IffOneQueue", VAR_SERVER},
1707 {"Interface", VAR_SERVER},
1708 {"InvitationExpire", VAR_SERVER},
1709 {"KeyExpire", VAR_SERVER},
1710 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1711 {"LocalDiscovery", VAR_SERVER},
1712 {"LogLevel", VAR_SERVER},
1713 {"MACExpire", VAR_SERVER},
1714 {"MaxConnectionBurst", VAR_SERVER},
1715 {"MaxOutputBufferSize", VAR_SERVER},
1716 {"MaxTimeout", VAR_SERVER},
1717 {"Mode", VAR_SERVER | VAR_SAFE},
1718 {"Name", VAR_SERVER},
1719 {"PingInterval", VAR_SERVER},
1720 {"PingTimeout", VAR_SERVER},
1721 {"PriorityInheritance", VAR_SERVER},
1722 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1723 {"PrivateKeyFile", VAR_SERVER},
1724 {"ProcessPriority", VAR_SERVER},
1725 {"Proxy", VAR_SERVER},
1726 {"ReplayWindow", VAR_SERVER},
1727 {"ScriptsExtension", VAR_SERVER},
1728 {"ScriptsInterpreter", VAR_SERVER},
1729 {"StrictSubnets", VAR_SERVER},
1730 {"TunnelServer", VAR_SERVER},
1731 {"UDPDiscovery", VAR_SERVER},
1732 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
1733 {"UDPDiscoveryInterval", VAR_SERVER},
1734 {"UDPDiscoveryTimeout", VAR_SERVER},
1735 {"MTUInfoInterval", VAR_SERVER},
1736 {"UDPInfoInterval", VAR_SERVER},
1737 {"UDPRcvBuf", VAR_SERVER},
1738 {"UDPSndBuf", VAR_SERVER},
1739 {"UPnP", VAR_SERVER},
1740 {"UPnPDiscoverWait", VAR_SERVER},
1741 {"UPnPRefreshPeriod", VAR_SERVER},
1742 {"VDEGroup", VAR_SERVER},
1743 {"VDEPort", VAR_SERVER},
1744 /* Host configuration */
1745 {"Address", VAR_HOST | VAR_MULTIPLE},
1746 {"Cipher", VAR_SERVER | VAR_HOST},
1747 {"ClampMSS", VAR_SERVER | VAR_HOST},
1748 {"Compression", VAR_SERVER | VAR_HOST},
1749 {"Digest", VAR_SERVER | VAR_HOST},
1750 {"Ed25519PublicKey", VAR_HOST},
1751 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1752 {"IndirectData", VAR_SERVER | VAR_HOST},
1753 {"MACLength", VAR_SERVER | VAR_HOST},
1754 {"PMTU", VAR_SERVER | VAR_HOST},
1755 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1757 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1758 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1759 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1760 {"TCPOnly", VAR_SERVER | VAR_HOST},
1761 {"Weight", VAR_HOST | VAR_SAFE},
1765 static int cmd_config(int argc, char *argv[]) {
1767 fprintf(stderr, "Invalid number of arguments.\n");
1771 if(strcasecmp(argv[0], "config")) {
1777 if(!strcasecmp(argv[1], "get")) {
1779 } else if(!strcasecmp(argv[1], "add")) {
1780 argv++, argc--, action = 1;
1781 } else if(!strcasecmp(argv[1], "del")) {
1782 argv++, argc--, action = -1;
1783 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1784 argv++, argc--, action = 0;
1788 fprintf(stderr, "Invalid number of arguments.\n");
1792 // Concatenate the rest of the command line
1793 strncpy(line, argv[1], sizeof(line) - 1);
1795 for(int i = 2; i < argc; i++) {
1796 strncat(line, " ", sizeof(line) - 1 - strlen(line));
1797 strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
1800 // Liberal parsing into node name, variable name and value.
1806 len = strcspn(line, "\t =");
1808 value += strspn(value, "\t ");
1812 value += strspn(value, "\t ");
1816 variable = strchr(line, '.');
1826 fprintf(stderr, "No variable given.\n");
1830 if(action >= 0 && !*value) {
1831 fprintf(stderr, "No value for variable given.\n");
1835 if(action < -1 && *value) {
1839 /* Some simple checks. */
1841 bool warnonremove = false;
1843 for(int i = 0; variables[i].name; i++) {
1844 if(strcasecmp(variables[i].name, variable)) {
1849 variable = (char *)variables[i].name;
1851 /* Discourage use of obsolete variables. */
1853 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1855 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1857 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1862 /* Don't put server variables in host config files */
1864 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1866 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1868 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1873 /* Should this go into our own host config file? */
1875 if(!node && !(variables[i].type & VAR_SERVER)) {
1876 node = get_my_name(true);
1883 /* Change "add" into "set" for variables that do not allow multiple occurrences.
1884 Turn on warnings when it seems variables might be removed unintentionally. */
1886 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1887 warnonremove = true;
1889 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1890 warnonremove = true;
1896 if(node && !check_id(node)) {
1897 fprintf(stderr, "Invalid name for node.\n");
1902 if(force || action < 0) {
1903 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1905 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1910 // Open the right configuration file.
1911 char filename[PATH_MAX];
1914 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
1916 snprintf(filename, sizeof(filename), "%s", tinc_conf);
1919 FILE *f = fopen(filename, "r");
1922 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1926 char tmpfile[PATH_MAX];
1930 snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename);
1931 tf = fopen(tmpfile, "w");
1934 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1940 // Copy the file, making modifications on the fly, unless we are just getting a value.
1944 bool removed = false;
1947 while(fgets(buf1, sizeof(buf1), f)) {
1948 buf1[sizeof(buf1) - 1] = 0;
1949 strncpy(buf2, buf1, sizeof(buf2));
1951 // Parse line in a simple way
1955 len = strcspn(buf2, "\t =");
1956 bvalue = buf2 + len;
1957 bvalue += strspn(bvalue, "\t ");
1959 if(*bvalue == '=') {
1961 bvalue += strspn(bvalue, "\t ");
1968 if(!strcasecmp(buf2, variable)) {
1972 printf("%s\n", bvalue);
1974 } else if(action == -1) {
1975 if(!*value || !strcasecmp(bvalue, value)) {
1981 } else if(action == 0) {
1982 // Warn if "set" was used for variables that can occur multiple times
1983 if(warnonremove && strcasecmp(bvalue, value)) {
1984 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1987 // Already set? Delete the rest...
1992 // Otherwise, replace.
1993 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1994 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2001 } else if(action > 0) {
2002 // Check if we've already seen this variable with the same value
2003 if(!strcasecmp(bvalue, value)) {
2010 // Copy original line...
2011 if(fputs(buf1, tf) < 0) {
2012 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2016 // Add newline if it is missing...
2017 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
2018 if(fputc('\n', tf) < 0) {
2019 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2026 // Make sure we read everything...
2027 if(ferror(f) || !feof(f)) {
2028 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
2033 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
2037 // Add new variable if necessary.
2038 if((action > 0 && !found) || (action == 0 && !set)) {
2039 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
2040 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2049 fprintf(stderr, "No matching configuration variables found.\n");
2054 // Make sure we wrote everything...
2056 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
2060 // Could we find what we had to remove?
2061 if(action < 0 && !removed) {
2063 fprintf(stderr, "No configuration variables deleted.\n");
2067 // Replace the configuration file with the new one
2070 if(remove(filename)) {
2071 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
2077 if(rename(tmpfile, filename)) {
2078 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
2082 // Silently try notifying a running tincd of changes.
2083 if(connect_tincd(false)) {
2084 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2090 static bool try_bind(int port) {
2091 struct addrinfo *ai = NULL, *aip;
2092 struct addrinfo hint = {
2093 .ai_flags = AI_PASSIVE,
2094 .ai_family = AF_UNSPEC,
2095 .ai_socktype = SOCK_STREAM,
2096 .ai_protocol = IPPROTO_TCP,
2099 bool success = true;
2101 snprintf(portstr, sizeof(portstr), "%d", port);
2103 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
2107 for(aip = ai; aip; aip = aip->ai_next) {
2108 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
2115 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
2128 int check_port(char *name) {
2133 fprintf(stderr, "Warning: could not bind to port 655. ");
2135 for(int i = 0; i < 100; i++) {
2136 int port = 0x1000 + (rand() & 0x7fff);
2138 if(try_bind(port)) {
2139 char filename[PATH_MAX];
2140 snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", confbase, name);
2141 FILE *f = fopen(filename, "a");
2144 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
2145 fprintf(stderr, "Please change tinc's Port manually.\n");
2149 fprintf(f, "Port = %d\n", port);
2151 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
2156 fprintf(stderr, "Please change tinc's Port manually.\n");
2160 static int cmd_init(int argc, char *argv[]) {
2161 if(!access(tinc_conf, F_OK)) {
2162 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
2167 fprintf(stderr, "Too many arguments!\n");
2169 } else if(argc < 2) {
2172 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
2174 if(!fgets(buf, sizeof(buf), stdin)) {
2175 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
2179 int len = rstrip(buf);
2182 fprintf(stderr, "No name given!\n");
2188 fprintf(stderr, "No Name given!\n");
2192 name = strdup(argv[1]);
2195 fprintf(stderr, "No Name given!\n");
2200 if(!check_id(name)) {
2201 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
2205 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
2206 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
2210 if(mkdir(confbase, 0777) && errno != EEXIST) {
2211 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
2215 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
2216 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
2220 FILE *f = fopen(tinc_conf, "w");
2223 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
2227 fprintf(f, "Name = %s\n", name);
2230 #ifndef DISABLE_LEGACY
2232 if(!rsa_keygen(2048, false)) {
2238 if(!ed25519_keygen(false)) {
2245 char filename[PATH_MAX];
2246 snprintf(filename, sizeof(filename), "%s" SLASH "tinc-up", confbase);
2248 if(access(filename, F_OK)) {
2249 FILE *f = fopenmask(filename, "w", 0777);
2252 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
2256 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");
2266 static int cmd_generate_keys(int argc, char *argv[]) {
2267 #ifdef DISABLE_LEGACY
2274 fprintf(stderr, "Too many arguments!\n");
2279 name = get_my_name(false);
2282 #ifndef DISABLE_LEGACY
2284 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
2290 if(!ed25519_keygen(true)) {
2297 #ifndef DISABLE_LEGACY
2298 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
2300 fprintf(stderr, "Too many arguments!\n");
2305 name = get_my_name(false);
2308 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
2312 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
2314 fprintf(stderr, "Too many arguments!\n");
2319 name = get_my_name(false);
2322 return !ed25519_keygen(true);
2325 static int cmd_help(int argc, char *argv[]) {
2330 static int cmd_version(int argc, char *argv[]) {
2332 fprintf(stderr, "Too many arguments!\n");
2340 static int cmd_info(int argc, char *argv[]) {
2342 fprintf(stderr, "Invalid number of arguments.\n");
2346 if(!connect_tincd(true)) {
2350 return info(fd, argv[1]);
2353 static const char *conffiles[] = {
2364 static int cmd_edit(int argc, char *argv[]) {
2366 fprintf(stderr, "Invalid number of arguments.\n");
2370 char filename[PATH_MAX] = "";
2372 if(strncmp(argv[1], "hosts" SLASH, 6)) {
2373 for(int i = 0; conffiles[i]; i++) {
2374 if(!strcmp(argv[1], conffiles[i])) {
2375 snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
2384 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
2385 char *dash = strchr(argv[1], '-');
2390 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
2391 fprintf(stderr, "Invalid configuration filename.\n");
2399 xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ? : getenv("EDITOR") ? : "vi", filename);
2401 xasprintf(&command, "edit \"%s\"", filename);
2403 int result = system(command);
2410 // Silently try notifying a running tincd of changes.
2411 if(connect_tincd(false)) {
2412 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2418 static int export(const char *name, FILE *out) {
2419 char filename[PATH_MAX];
2420 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2421 FILE *in = fopen(filename, "r");
2424 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
2428 fprintf(out, "Name = %s\n", name);
2431 while(fgets(buf, sizeof(buf), in)) {
2432 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
2438 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2447 static int cmd_export(int argc, char *argv[]) {
2449 fprintf(stderr, "Too many arguments!\n");
2453 char *name = get_my_name(true);
2459 int result = export(name, stdout);
2469 static int cmd_export_all(int argc, char *argv[]) {
2471 fprintf(stderr, "Too many arguments!\n");
2475 DIR *dir = opendir(hosts_dir);
2478 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2486 while((ent = readdir(dir))) {
2487 if(!check_id(ent->d_name)) {
2494 printf("#---------------------------------------------------------------#\n");
2497 result |= export(ent->d_name, stdout);
2509 static int cmd_import(int argc, char *argv[]) {
2511 fprintf(stderr, "Too many arguments!\n");
2520 char filename[PATH_MAX] = "";
2522 bool firstline = true;
2524 while(fgets(buf, sizeof(buf), in)) {
2525 if(sscanf(buf, "Name = %4095s", name) == 1) {
2528 if(!check_id(name)) {
2529 fprintf(stderr, "Invalid Name in input!\n");
2537 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2539 if(!force && !access(filename, F_OK)) {
2540 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2545 out = fopen(filename, "w");
2548 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2554 } else if(firstline) {
2555 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2560 if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
2565 if(fputs(buf, out) < 0) {
2566 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2577 fprintf(stderr, "Imported %d host configuration files.\n", count);
2580 fprintf(stderr, "No host configuration files imported.\n");
2585 static int cmd_exchange(int argc, char *argv[]) {
2586 return cmd_export(argc, argv) ? : cmd_import(argc, argv);
2589 static int cmd_exchange_all(int argc, char *argv[]) {
2590 return cmd_export_all(argc, argv) ? : cmd_import(argc, argv);
2593 static int switch_network(char *name) {
2594 if(strcmp(name, ".")) {
2595 if(!check_netname(name, false)) {
2596 fprintf(stderr, "Invalid character in netname!\n");
2600 if(!check_netname(name, true)) {
2601 fprintf(stderr, "Warning: unsafe character in netname!\n");
2611 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2618 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2619 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2620 xasprintf(&prompt, "%s> ", identname);
2625 static int cmd_network(int argc, char *argv[]) {
2627 fprintf(stderr, "Too many arguments!\n");
2632 return switch_network(argv[1]);
2635 DIR *dir = opendir(confdir);
2638 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2644 while((ent = readdir(dir))) {
2645 if(*ent->d_name == '.') {
2649 if(!strcmp(ent->d_name, "tinc.conf")) {
2654 char fname[PATH_MAX];
2655 snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
2657 if(!access(fname, R_OK)) {
2658 printf("%s\n", ent->d_name);
2667 static int cmd_fsck(int argc, char *argv[]) {
2669 fprintf(stderr, "Too many arguments!\n");
2673 return fsck(orig_argv[0]);
2676 static void *readfile(FILE *in, size_t *len) {
2678 size_t alloced = 4096;
2679 char *buf = xmalloc(alloced);
2682 size_t read = fread(buf + count, 1, alloced - count, in);
2690 if(count >= alloced) {
2692 buf = xrealloc(buf, alloced);
2703 static int cmd_sign(int argc, char *argv[]) {
2705 fprintf(stderr, "Too many arguments!\n");
2710 name = get_my_name(true);
2717 char fname[PATH_MAX];
2718 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
2719 FILE *fp = fopen(fname, "r");
2722 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2726 ecdsa_t *key = ecdsa_read_pem_private_key(fp);
2729 fprintf(stderr, "Could not read private key from %s\n", fname);
2739 in = fopen(argv[1], "rb");
2742 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
2751 char *data = readfile(in, &len);
2758 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2763 // Ensure we sign our name and current time as well
2764 long t = time(NULL);
2766 xasprintf(&trailer, " %s %ld", name, t);
2767 int trailer_len = strlen(trailer);
2769 data = xrealloc(data, len + trailer_len);
2770 memcpy(data + len, trailer, trailer_len);
2775 if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
2776 fprintf(stderr, "Error generating signature\n");
2782 b64encode(sig, sig, 64);
2785 fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
2786 fwrite(data, len, 1, stdout);
2792 static int cmd_verify(int argc, char *argv[]) {
2794 fprintf(stderr, "Not enough arguments!\n");
2799 fprintf(stderr, "Too many arguments!\n");
2803 char *node = argv[1];
2805 if(!strcmp(node, ".")) {
2807 name = get_my_name(true);
2815 } else if(!strcmp(node, "*")) {
2818 if(!check_id(node)) {
2819 fprintf(stderr, "Invalid node name\n");
2827 in = fopen(argv[2], "rb");
2830 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
2838 char *data = readfile(in, &len);
2845 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2849 char *newline = memchr(data, '\n', len);
2851 if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
2852 fprintf(stderr, "Invalid input\n");
2858 size_t skip = newline - data;
2860 char signer[MAX_STRING_SIZE] = "";
2861 char sig[MAX_STRING_SIZE] = "";
2864 if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
2865 fprintf(stderr, "Invalid input\n");
2870 if(node && strcmp(node, signer)) {
2871 fprintf(stderr, "Signature is not made by %s\n", node);
2881 xasprintf(&trailer, " %s %ld", signer, t);
2882 int trailer_len = strlen(trailer);
2884 data = xrealloc(data, len + trailer_len);
2885 memcpy(data + len, trailer, trailer_len);
2888 newline = data + skip;
2890 char fname[PATH_MAX];
2891 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
2892 FILE *fp = fopen(fname, "r");
2895 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2900 ecdsa_t *key = get_pubkey(fp);
2904 key = ecdsa_read_pem_public_key(fp);
2908 fprintf(stderr, "Could not read public key from %s\n", fname);
2916 if(b64decode(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
2917 fprintf(stderr, "Invalid signature\n");
2925 fwrite(newline, len - (newline - data), 1, stdout);
2931 static const struct {
2932 const char *command;
2933 int (*function)(int argc, char *argv[]);
2936 {"start", cmd_start},
2938 {"restart", cmd_restart},
2939 {"reload", cmd_reload},
2942 {"purge", cmd_purge},
2943 {"debug", cmd_debug},
2944 {"retry", cmd_retry},
2945 {"connect", cmd_connect},
2946 {"disconnect", cmd_disconnect},
2951 {"config", cmd_config, true},
2952 {"add", cmd_config},
2953 {"del", cmd_config},
2954 {"get", cmd_config},
2955 {"set", cmd_config},
2957 {"generate-keys", cmd_generate_keys},
2958 #ifndef DISABLE_LEGACY
2959 {"generate-rsa-keys", cmd_generate_rsa_keys},
2961 {"generate-ed25519-keys", cmd_generate_ed25519_keys},
2963 {"version", cmd_version},
2966 {"export", cmd_export},
2967 {"export-all", cmd_export_all},
2968 {"import", cmd_import},
2969 {"exchange", cmd_exchange},
2970 {"exchange-all", cmd_exchange_all},
2971 {"invite", cmd_invite},
2973 {"network", cmd_network},
2976 {"verify", cmd_verify},
2980 #ifdef HAVE_READLINE
2981 static char *complete_command(const char *text, int state) {
2990 while(commands[i].command) {
2991 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
2992 return xstrdup(commands[i].command);
3001 static char *complete_dump(const char *text, int state) {
3002 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
3012 if(!strncasecmp(matches[i], text, strlen(text))) {
3013 return xstrdup(matches[i]);
3022 static char *complete_config(const char *text, int state) {
3031 while(variables[i].name) {
3032 char *dot = strchr(text, '.');
3035 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
3037 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
3041 if(!strncasecmp(variables[i].name, text, strlen(text))) {
3042 return xstrdup(variables[i].name);
3052 static char *complete_info(const char *text, int state) {
3058 if(!connect_tincd(false)) {
3062 // Check the list of nodes
3063 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
3064 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
3067 while(recvline(fd, line, sizeof(line))) {
3069 int n = sscanf(line, "%d %d %4095s", &code, &req, item);
3082 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
3086 if(!strncmp(item, text, strlen(text))) {
3087 return xstrdup(strip_weight(item));
3094 static char *complete_nothing(const char *text, int state) {
3098 static char **completion(const char *text, int start, int end) {
3099 char **matches = NULL;
3102 matches = rl_completion_matches(text, complete_command);
3103 } else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
3104 matches = rl_completion_matches(text, complete_dump);
3105 } else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
3106 matches = rl_completion_matches(text, complete_config);
3107 } else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
3108 matches = rl_completion_matches(text, complete_config);
3109 } else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
3110 matches = rl_completion_matches(text, complete_config);
3111 } else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
3112 matches = rl_completion_matches(text, complete_config);
3113 } else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
3114 matches = rl_completion_matches(text, complete_info);
3121 static int cmd_shell(int argc, char *argv[]) {
3122 xasprintf(&prompt, "%s> ", identname);
3126 int maxargs = argc + 16;
3127 char **nargv = xmalloc(maxargs * sizeof(*nargv));
3129 for(int i = 0; i < argc; i++) {
3133 #ifdef HAVE_READLINE
3134 rl_readline_name = "tinc";
3135 rl_completion_entry_function = complete_nothing;
3136 rl_attempted_completion_function = completion;
3137 rl_filename_completion_desired = 0;
3142 #ifdef HAVE_READLINE
3147 rl_basic_word_break_characters = "\t\n ";
3148 line = readline(prompt);
3151 copy = xstrdup(line);
3154 line = fgets(buf, sizeof(buf), stdin);
3160 fputs(prompt, stdout);
3163 line = fgets(buf, sizeof(buf), stdin);
3170 /* Ignore comments */
3179 char *p = line + strspn(line, " \t\n");
3180 char *next = strtok(p, " \t\n");
3183 if(nargc >= maxargs) {
3185 nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
3190 next = strtok(NULL, " \t\n");
3197 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
3204 for(int i = 0; commands[i].command; i++) {
3205 if(!strcasecmp(nargv[argc], commands[i].command)) {
3206 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
3212 #ifdef HAVE_READLINE
3221 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
3236 int main(int argc, char *argv[]) {
3237 program_name = argv[0];
3240 tty = isatty(0) && isatty(1);
3242 if(!parse_options(argc, argv)) {
3247 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
3248 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
3261 static struct WSAData wsa_state;
3263 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
3264 fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
3273 if(optind >= argc) {
3274 return cmd_shell(argc, argv);
3277 for(int i = 0; commands[i].command; i++) {
3278 if(!strcasecmp(argv[optind], commands[i].command)) {
3279 return commands[i].function(argc - optind, argv + optind);
3283 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);