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 {"FWMark", VAR_SERVER},
1699 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1700 {"Hostnames", VAR_SERVER},
1701 {"IffOneQueue", VAR_SERVER},
1702 {"Interface", VAR_SERVER},
1703 {"InvitationExpire", VAR_SERVER},
1704 {"KeyExpire", VAR_SERVER},
1705 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1706 {"LocalDiscovery", VAR_SERVER},
1707 {"LogLevel", VAR_SERVER},
1708 {"MACExpire", VAR_SERVER},
1709 {"MaxConnectionBurst", VAR_SERVER},
1710 {"MaxOutputBufferSize", VAR_SERVER},
1711 {"MaxTimeout", VAR_SERVER},
1712 {"Mode", VAR_SERVER | VAR_SAFE},
1713 {"Name", VAR_SERVER},
1714 {"PingInterval", VAR_SERVER},
1715 {"PingTimeout", VAR_SERVER},
1716 {"PriorityInheritance", VAR_SERVER},
1717 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1718 {"PrivateKeyFile", VAR_SERVER},
1719 {"ProcessPriority", VAR_SERVER},
1720 {"Proxy", VAR_SERVER},
1721 {"ReplayWindow", VAR_SERVER},
1722 {"ScriptsExtension", VAR_SERVER},
1723 {"ScriptsInterpreter", VAR_SERVER},
1724 {"StrictSubnets", VAR_SERVER},
1725 {"TunnelServer", VAR_SERVER},
1726 {"UDPDiscovery", VAR_SERVER},
1727 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
1728 {"UDPDiscoveryInterval", VAR_SERVER},
1729 {"UDPDiscoveryTimeout", VAR_SERVER},
1730 {"MTUInfoInterval", VAR_SERVER},
1731 {"UDPInfoInterval", VAR_SERVER},
1732 {"UDPRcvBuf", VAR_SERVER},
1733 {"UDPSndBuf", VAR_SERVER},
1734 {"UPnP", VAR_SERVER},
1735 {"UPnPDiscoverWait", VAR_SERVER},
1736 {"UPnPRefreshPeriod", VAR_SERVER},
1737 {"VDEGroup", VAR_SERVER},
1738 {"VDEPort", VAR_SERVER},
1739 /* Host configuration */
1740 {"Address", VAR_HOST | VAR_MULTIPLE},
1741 {"Cipher", VAR_SERVER | VAR_HOST},
1742 {"ClampMSS", VAR_SERVER | VAR_HOST},
1743 {"Compression", VAR_SERVER | VAR_HOST},
1744 {"Digest", VAR_SERVER | VAR_HOST},
1745 {"Ed25519PublicKey", VAR_HOST},
1746 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1747 {"IndirectData", VAR_SERVER | VAR_HOST},
1748 {"MACLength", VAR_SERVER | VAR_HOST},
1749 {"PMTU", VAR_SERVER | VAR_HOST},
1750 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1752 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1753 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1754 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1755 {"TCPOnly", VAR_SERVER | VAR_HOST},
1756 {"Weight", VAR_HOST | VAR_SAFE},
1760 static int cmd_config(int argc, char *argv[]) {
1762 fprintf(stderr, "Invalid number of arguments.\n");
1766 if(strcasecmp(argv[0], "config")) {
1772 if(!strcasecmp(argv[1], "get")) {
1774 } else if(!strcasecmp(argv[1], "add")) {
1775 argv++, argc--, action = 1;
1776 } else if(!strcasecmp(argv[1], "del")) {
1777 argv++, argc--, action = -1;
1778 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1779 argv++, argc--, action = 0;
1783 fprintf(stderr, "Invalid number of arguments.\n");
1787 // Concatenate the rest of the command line
1788 strncpy(line, argv[1], sizeof(line) - 1);
1790 for(int i = 2; i < argc; i++) {
1791 strncat(line, " ", sizeof(line) - 1 - strlen(line));
1792 strncat(line, argv[i], sizeof(line) - 1 - strlen(line));
1795 // Liberal parsing into node name, variable name and value.
1801 len = strcspn(line, "\t =");
1803 value += strspn(value, "\t ");
1807 value += strspn(value, "\t ");
1811 variable = strchr(line, '.');
1821 fprintf(stderr, "No variable given.\n");
1825 if(action >= 0 && !*value) {
1826 fprintf(stderr, "No value for variable given.\n");
1830 if(action < -1 && *value) {
1834 /* Some simple checks. */
1836 bool warnonremove = false;
1838 for(int i = 0; variables[i].name; i++) {
1839 if(strcasecmp(variables[i].name, variable)) {
1844 variable = (char *)variables[i].name;
1846 /* Discourage use of obsolete variables. */
1848 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1850 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1852 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1857 /* Don't put server variables in host config files */
1859 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1861 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1863 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1868 /* Should this go into our own host config file? */
1870 if(!node && !(variables[i].type & VAR_SERVER)) {
1871 node = get_my_name(true);
1878 /* Change "add" into "set" for variables that do not allow multiple occurrences.
1879 Turn on warnings when it seems variables might be removed unintentionally. */
1881 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1882 warnonremove = true;
1884 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1885 warnonremove = true;
1891 if(node && !check_id(node)) {
1892 fprintf(stderr, "Invalid name for node.\n");
1897 if(force || action < 0) {
1898 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1900 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1905 // Open the right configuration file.
1906 char filename[PATH_MAX];
1909 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, node);
1911 snprintf(filename, sizeof(filename), "%s", tinc_conf);
1914 FILE *f = fopen(filename, "r");
1917 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1921 char tmpfile[PATH_MAX];
1925 snprintf(tmpfile, sizeof(tmpfile), "%s.config.tmp", filename);
1926 tf = fopen(tmpfile, "w");
1929 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1935 // Copy the file, making modifications on the fly, unless we are just getting a value.
1939 bool removed = false;
1942 while(fgets(buf1, sizeof(buf1), f)) {
1943 buf1[sizeof(buf1) - 1] = 0;
1944 strncpy(buf2, buf1, sizeof(buf2));
1946 // Parse line in a simple way
1950 len = strcspn(buf2, "\t =");
1951 bvalue = buf2 + len;
1952 bvalue += strspn(bvalue, "\t ");
1954 if(*bvalue == '=') {
1956 bvalue += strspn(bvalue, "\t ");
1963 if(!strcasecmp(buf2, variable)) {
1967 printf("%s\n", bvalue);
1969 } else if(action == -1) {
1970 if(!*value || !strcasecmp(bvalue, value)) {
1976 } else if(action == 0) {
1977 // Warn if "set" was used for variables that can occur multiple times
1978 if(warnonremove && strcasecmp(bvalue, value)) {
1979 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1982 // Already set? Delete the rest...
1987 // Otherwise, replace.
1988 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1989 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1996 } else if(action > 0) {
1997 // Check if we've already seen this variable with the same value
1998 if(!strcasecmp(bvalue, value)) {
2005 // Copy original line...
2006 if(fputs(buf1, tf) < 0) {
2007 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2011 // Add newline if it is missing...
2012 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
2013 if(fputc('\n', tf) < 0) {
2014 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2021 // Make sure we read everything...
2022 if(ferror(f) || !feof(f)) {
2023 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
2028 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
2032 // Add new variable if necessary.
2033 if((action > 0 && !found) || (action == 0 && !set)) {
2034 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
2035 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
2044 fprintf(stderr, "No matching configuration variables found.\n");
2049 // Make sure we wrote everything...
2051 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
2055 // Could we find what we had to remove?
2056 if(action < 0 && !removed) {
2058 fprintf(stderr, "No configuration variables deleted.\n");
2062 // Replace the configuration file with the new one
2065 if(remove(filename)) {
2066 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
2072 if(rename(tmpfile, filename)) {
2073 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
2077 // Silently try notifying a running tincd of changes.
2078 if(connect_tincd(false)) {
2079 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2085 static bool try_bind(int port) {
2086 struct addrinfo *ai = NULL, *aip;
2087 struct addrinfo hint = {
2088 .ai_flags = AI_PASSIVE,
2089 .ai_family = AF_UNSPEC,
2090 .ai_socktype = SOCK_STREAM,
2091 .ai_protocol = IPPROTO_TCP,
2094 bool success = true;
2096 snprintf(portstr, sizeof(portstr), "%d", port);
2098 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai) {
2102 for(aip = ai; aip; aip = aip->ai_next) {
2103 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
2110 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
2123 int check_port(char *name) {
2128 fprintf(stderr, "Warning: could not bind to port 655. ");
2130 for(int i = 0; i < 100; i++) {
2131 int port = 0x1000 + (rand() & 0x7fff);
2133 if(try_bind(port)) {
2134 char filename[PATH_MAX];
2135 snprintf(filename, sizeof(filename), "%s" SLASH "hosts" SLASH "%s", confbase, name);
2136 FILE *f = fopen(filename, "a");
2139 fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
2140 fprintf(stderr, "Please change tinc's Port manually.\n");
2144 fprintf(f, "Port = %d\n", port);
2146 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
2151 fprintf(stderr, "Please change tinc's Port manually.\n");
2155 static int cmd_init(int argc, char *argv[]) {
2156 if(!access(tinc_conf, F_OK)) {
2157 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
2162 fprintf(stderr, "Too many arguments!\n");
2164 } else if(argc < 2) {
2167 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
2169 if(!fgets(buf, sizeof(buf), stdin)) {
2170 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
2174 int len = rstrip(buf);
2177 fprintf(stderr, "No name given!\n");
2183 fprintf(stderr, "No Name given!\n");
2187 name = strdup(argv[1]);
2190 fprintf(stderr, "No Name given!\n");
2195 if(!check_id(name)) {
2196 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
2200 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
2201 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
2205 if(mkdir(confbase, 0777) && errno != EEXIST) {
2206 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
2210 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
2211 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
2215 FILE *f = fopen(tinc_conf, "w");
2218 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
2222 fprintf(f, "Name = %s\n", name);
2225 #ifndef DISABLE_LEGACY
2227 if(!rsa_keygen(2048, false)) {
2233 if(!ed25519_keygen(false)) {
2240 char filename[PATH_MAX];
2241 snprintf(filename, sizeof(filename), "%s" SLASH "tinc-up", confbase);
2243 if(access(filename, F_OK)) {
2244 FILE *f = fopenmask(filename, "w", 0777);
2247 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
2251 fprintf(f, "#!/bin/sh\n\necho 'Unconfigured tinc-up script, please edit '$0'!'\n\n#ifconfig $INTERFACE <your vpn IP address> netmask <netmask of whole VPN>\n");
2261 static int cmd_generate_keys(int argc, char *argv[]) {
2262 #ifdef DISABLE_LEGACY
2269 fprintf(stderr, "Too many arguments!\n");
2274 name = get_my_name(false);
2277 #ifndef DISABLE_LEGACY
2279 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true)) {
2285 if(!ed25519_keygen(true)) {
2292 #ifndef DISABLE_LEGACY
2293 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
2295 fprintf(stderr, "Too many arguments!\n");
2300 name = get_my_name(false);
2303 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
2307 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
2309 fprintf(stderr, "Too many arguments!\n");
2314 name = get_my_name(false);
2317 return !ed25519_keygen(true);
2320 static int cmd_help(int argc, char *argv[]) {
2325 static int cmd_version(int argc, char *argv[]) {
2327 fprintf(stderr, "Too many arguments!\n");
2335 static int cmd_info(int argc, char *argv[]) {
2337 fprintf(stderr, "Invalid number of arguments.\n");
2341 if(!connect_tincd(true)) {
2345 return info(fd, argv[1]);
2348 static const char *conffiles[] = {
2359 static int cmd_edit(int argc, char *argv[]) {
2361 fprintf(stderr, "Invalid number of arguments.\n");
2365 char filename[PATH_MAX] = "";
2367 if(strncmp(argv[1], "hosts" SLASH, 6)) {
2368 for(int i = 0; conffiles[i]; i++) {
2369 if(!strcmp(argv[1], conffiles[i])) {
2370 snprintf(filename, sizeof(filename), "%s" SLASH "%s", confbase, argv[1]);
2379 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, argv[1]);
2380 char *dash = strchr(argv[1], '-');
2385 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
2386 fprintf(stderr, "Invalid configuration filename.\n");
2394 xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ? : getenv("EDITOR") ? : "vi", filename);
2396 xasprintf(&command, "edit \"%s\"", filename);
2398 int result = system(command);
2405 // Silently try notifying a running tincd of changes.
2406 if(connect_tincd(false)) {
2407 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
2413 static int export(const char *name, FILE *out) {
2414 char filename[PATH_MAX];
2415 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2416 FILE *in = fopen(filename, "r");
2419 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
2423 fprintf(out, "Name = %s\n", name);
2426 while(fgets(buf, sizeof(buf), in)) {
2427 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4)) {
2433 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2442 static int cmd_export(int argc, char *argv[]) {
2444 fprintf(stderr, "Too many arguments!\n");
2448 char *name = get_my_name(true);
2454 int result = export(name, stdout);
2464 static int cmd_export_all(int argc, char *argv[]) {
2466 fprintf(stderr, "Too many arguments!\n");
2470 DIR *dir = opendir(hosts_dir);
2473 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2481 while((ent = readdir(dir))) {
2482 if(!check_id(ent->d_name)) {
2489 printf("#---------------------------------------------------------------#\n");
2492 result |= export(ent->d_name, stdout);
2504 static int cmd_import(int argc, char *argv[]) {
2506 fprintf(stderr, "Too many arguments!\n");
2515 char filename[PATH_MAX] = "";
2517 bool firstline = true;
2519 while(fgets(buf, sizeof(buf), in)) {
2520 if(sscanf(buf, "Name = %4095s", name) == 1) {
2523 if(!check_id(name)) {
2524 fprintf(stderr, "Invalid Name in input!\n");
2532 snprintf(filename, sizeof(filename), "%s" SLASH "%s", hosts_dir, name);
2534 if(!force && !access(filename, F_OK)) {
2535 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2540 out = fopen(filename, "w");
2543 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2549 } else if(firstline) {
2550 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2555 if(!strcmp(buf, "#---------------------------------------------------------------#\n")) {
2560 if(fputs(buf, out) < 0) {
2561 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2572 fprintf(stderr, "Imported %d host configuration files.\n", count);
2575 fprintf(stderr, "No host configuration files imported.\n");
2580 static int cmd_exchange(int argc, char *argv[]) {
2581 return cmd_export(argc, argv) ? : cmd_import(argc, argv);
2584 static int cmd_exchange_all(int argc, char *argv[]) {
2585 return cmd_export_all(argc, argv) ? : cmd_import(argc, argv);
2588 static int switch_network(char *name) {
2589 if(strcmp(name, ".")) {
2590 if(!check_netname(name, false)) {
2591 fprintf(stderr, "Invalid character in netname!\n");
2595 if(!check_netname(name, true)) {
2596 fprintf(stderr, "Warning: unsafe character in netname!\n");
2606 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2613 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2614 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2615 xasprintf(&prompt, "%s> ", identname);
2620 static int cmd_network(int argc, char *argv[]) {
2622 fprintf(stderr, "Too many arguments!\n");
2627 return switch_network(argv[1]);
2630 DIR *dir = opendir(confdir);
2633 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2639 while((ent = readdir(dir))) {
2640 if(*ent->d_name == '.') {
2644 if(!strcmp(ent->d_name, "tinc.conf")) {
2649 char fname[PATH_MAX];
2650 snprintf(fname, sizeof(fname), "%s/%s/tinc.conf", confdir, ent->d_name);
2652 if(!access(fname, R_OK)) {
2653 printf("%s\n", ent->d_name);
2662 static int cmd_fsck(int argc, char *argv[]) {
2664 fprintf(stderr, "Too many arguments!\n");
2668 return fsck(orig_argv[0]);
2671 static void *readfile(FILE *in, size_t *len) {
2673 size_t alloced = 4096;
2674 char *buf = xmalloc(alloced);
2677 size_t read = fread(buf + count, 1, alloced - count, in);
2685 if(count >= alloced) {
2687 buf = xrealloc(buf, alloced);
2698 static int cmd_sign(int argc, char *argv[]) {
2700 fprintf(stderr, "Too many arguments!\n");
2705 name = get_my_name(true);
2712 char fname[PATH_MAX];
2713 snprintf(fname, sizeof(fname), "%s" SLASH "ed25519_key.priv", confbase);
2714 FILE *fp = fopen(fname, "r");
2717 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2721 ecdsa_t *key = ecdsa_read_pem_private_key(fp);
2724 fprintf(stderr, "Could not read private key from %s\n", fname);
2734 in = fopen(argv[1], "rb");
2737 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
2746 char *data = readfile(in, &len);
2753 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2758 // Ensure we sign our name and current time as well
2759 long t = time(NULL);
2761 xasprintf(&trailer, " %s %ld", name, t);
2762 int trailer_len = strlen(trailer);
2764 data = xrealloc(data, len + trailer_len);
2765 memcpy(data + len, trailer, trailer_len);
2770 if(!ecdsa_sign(key, data, len + trailer_len, sig)) {
2771 fprintf(stderr, "Error generating signature\n");
2777 b64encode(sig, sig, 64);
2780 fprintf(stdout, "Signature = %s %ld %s\n", name, t, sig);
2781 fwrite(data, len, 1, stdout);
2787 static int cmd_verify(int argc, char *argv[]) {
2789 fprintf(stderr, "Not enough arguments!\n");
2794 fprintf(stderr, "Too many arguments!\n");
2798 char *node = argv[1];
2800 if(!strcmp(node, ".")) {
2802 name = get_my_name(true);
2810 } else if(!strcmp(node, "*")) {
2813 if(!check_id(node)) {
2814 fprintf(stderr, "Invalid node name\n");
2822 in = fopen(argv[2], "rb");
2825 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
2833 char *data = readfile(in, &len);
2840 fprintf(stderr, "Error reading %s: %s\n", argv[1], strerror(errno));
2844 char *newline = memchr(data, '\n', len);
2846 if(!newline || (newline - data > MAX_STRING_SIZE - 1)) {
2847 fprintf(stderr, "Invalid input\n");
2853 size_t skip = newline - data;
2855 char signer[MAX_STRING_SIZE] = "";
2856 char sig[MAX_STRING_SIZE] = "";
2859 if(sscanf(data, "Signature = %s %ld %s", signer, &t, sig) != 3 || strlen(sig) != 86 || !t || !check_id(signer)) {
2860 fprintf(stderr, "Invalid input\n");
2865 if(node && strcmp(node, signer)) {
2866 fprintf(stderr, "Signature is not made by %s\n", node);
2876 xasprintf(&trailer, " %s %ld", signer, t);
2877 int trailer_len = strlen(trailer);
2879 data = xrealloc(data, len + trailer_len);
2880 memcpy(data + len, trailer, trailer_len);
2883 newline = data + skip;
2885 char fname[PATH_MAX];
2886 snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, node);
2887 FILE *fp = fopen(fname, "r");
2890 fprintf(stderr, "Could not open %s: %s\n", fname, strerror(errno));
2895 ecdsa_t *key = get_pubkey(fp);
2899 key = ecdsa_read_pem_public_key(fp);
2903 fprintf(stderr, "Could not read public key from %s\n", fname);
2911 if(b64decode(sig, sig, 86) != 64 || !ecdsa_verify(key, newline, len + trailer_len - (newline - data), sig)) {
2912 fprintf(stderr, "Invalid signature\n");
2920 fwrite(newline, len - (newline - data), 1, stdout);
2926 static const struct {
2927 const char *command;
2928 int (*function)(int argc, char *argv[]);
2931 {"start", cmd_start},
2933 {"restart", cmd_restart},
2934 {"reload", cmd_reload},
2937 {"purge", cmd_purge},
2938 {"debug", cmd_debug},
2939 {"retry", cmd_retry},
2940 {"connect", cmd_connect},
2941 {"disconnect", cmd_disconnect},
2946 {"config", cmd_config, true},
2947 {"add", cmd_config},
2948 {"del", cmd_config},
2949 {"get", cmd_config},
2950 {"set", cmd_config},
2952 {"generate-keys", cmd_generate_keys},
2953 #ifndef DISABLE_LEGACY
2954 {"generate-rsa-keys", cmd_generate_rsa_keys},
2956 {"generate-ed25519-keys", cmd_generate_ed25519_keys},
2958 {"version", cmd_version},
2961 {"export", cmd_export},
2962 {"export-all", cmd_export_all},
2963 {"import", cmd_import},
2964 {"exchange", cmd_exchange},
2965 {"exchange-all", cmd_exchange_all},
2966 {"invite", cmd_invite},
2968 {"network", cmd_network},
2971 {"verify", cmd_verify},
2975 #ifdef HAVE_READLINE
2976 static char *complete_command(const char *text, int state) {
2985 while(commands[i].command) {
2986 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text))) {
2987 return xstrdup(commands[i].command);
2996 static char *complete_dump(const char *text, int state) {
2997 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
3007 if(!strncasecmp(matches[i], text, strlen(text))) {
3008 return xstrdup(matches[i]);
3017 static char *complete_config(const char *text, int state) {
3026 while(variables[i].name) {
3027 char *dot = strchr(text, '.');
3030 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
3032 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
3036 if(!strncasecmp(variables[i].name, text, strlen(text))) {
3037 return xstrdup(variables[i].name);
3047 static char *complete_info(const char *text, int state) {
3053 if(!connect_tincd(false)) {
3057 // Check the list of nodes
3058 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
3059 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
3062 while(recvline(fd, line, sizeof(line))) {
3064 int n = sscanf(line, "%d %d %4095s", &code, &req, item);
3077 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
3081 if(!strncmp(item, text, strlen(text))) {
3082 return xstrdup(strip_weight(item));
3089 static char *complete_nothing(const char *text, int state) {
3093 static char **completion(const char *text, int start, int end) {
3094 char **matches = NULL;
3097 matches = rl_completion_matches(text, complete_command);
3098 } else if(!strncasecmp(rl_line_buffer, "dump ", 5)) {
3099 matches = rl_completion_matches(text, complete_dump);
3100 } else if(!strncasecmp(rl_line_buffer, "add ", 4)) {
3101 matches = rl_completion_matches(text, complete_config);
3102 } else if(!strncasecmp(rl_line_buffer, "del ", 4)) {
3103 matches = rl_completion_matches(text, complete_config);
3104 } else if(!strncasecmp(rl_line_buffer, "get ", 4)) {
3105 matches = rl_completion_matches(text, complete_config);
3106 } else if(!strncasecmp(rl_line_buffer, "set ", 4)) {
3107 matches = rl_completion_matches(text, complete_config);
3108 } else if(!strncasecmp(rl_line_buffer, "info ", 5)) {
3109 matches = rl_completion_matches(text, complete_info);
3116 static int cmd_shell(int argc, char *argv[]) {
3117 xasprintf(&prompt, "%s> ", identname);
3121 int maxargs = argc + 16;
3122 char **nargv = xmalloc(maxargs * sizeof(*nargv));
3124 for(int i = 0; i < argc; i++) {
3128 #ifdef HAVE_READLINE
3129 rl_readline_name = "tinc";
3130 rl_completion_entry_function = complete_nothing;
3131 rl_attempted_completion_function = completion;
3132 rl_filename_completion_desired = 0;
3137 #ifdef HAVE_READLINE
3142 rl_basic_word_break_characters = "\t\n ";
3143 line = readline(prompt);
3146 copy = xstrdup(line);
3149 line = fgets(buf, sizeof(buf), stdin);
3155 fputs(prompt, stdout);
3158 line = fgets(buf, sizeof(buf), stdin);
3165 /* Ignore comments */
3174 char *p = line + strspn(line, " \t\n");
3175 char *next = strtok(p, " \t\n");
3178 if(nargc >= maxargs) {
3180 nargv = xrealloc(nargv, maxargs * sizeof(*nargv));
3185 next = strtok(NULL, " \t\n");
3192 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit")) {
3199 for(int i = 0; commands[i].command; i++) {
3200 if(!strcasecmp(nargv[argc], commands[i].command)) {
3201 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
3207 #ifdef HAVE_READLINE
3216 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
3231 int main(int argc, char *argv[]) {
3232 program_name = argv[0];
3235 tty = isatty(0) && isatty(1);
3237 if(!parse_options(argc, argv)) {
3242 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
3243 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
3256 static struct WSAData wsa_state;
3258 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
3259 fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
3268 if(optind >= argc) {
3269 return cmd_shell(argc, argv);
3272 for(int i = 0; commands[i].command; i++) {
3273 if(!strcasecmp(argv[optind], commands[i].command)) {
3274 return commands[i].function(argc - optind, argv + optind);
3278 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);