2 tincctl.c -- Controlling a running tincd
3 Copyright (C) 2007-2014 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 = "";
78 static struct option const long_options[] = {
79 {"batch", no_argument, NULL, 'b'},
80 {"config", required_argument, NULL, 'c'},
81 {"net", required_argument, NULL, 'n'},
82 {"help", no_argument, NULL, 1},
83 {"version", no_argument, NULL, 2},
84 {"pidfile", required_argument, NULL, 3},
85 {"force", no_argument, NULL, 4},
89 static void version(void) {
90 printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
91 VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
92 printf("Copyright (C) 1998-2014 Ivo Timmermans, Guus Sliepen and others.\n"
93 "See the AUTHORS file for a complete list.\n\n"
94 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
95 "and you are welcome to redistribute it under certain conditions;\n"
96 "see the file COPYING for details.\n");
99 static void usage(bool status) {
101 fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
103 printf("Usage: %s [options] command\n\n", program_name);
104 printf("Valid options are:\n"
105 " -b, --batch Don't ask for anything (non-interactive mode).\n"
106 " -c, --config=DIR Read configuration options from DIR.\n"
107 " -n, --net=NETNAME Connect to net NETNAME.\n"
108 " --pidfile=FILENAME Read control cookie from FILENAME.\n"
109 " --help Display this help and exit.\n"
110 " --version Output version information and exit.\n"
112 "Valid commands are:\n"
113 " init [name] Create initial configuration files.\n"
114 " get VARIABLE Print current value of VARIABLE\n"
115 " set VARIABLE VALUE Set VARIABLE to VALUE\n"
116 " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
117 " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
118 " start [tincd options] Start tincd.\n"
119 " stop Stop tincd.\n"
120 " restart [tincd options] Restart tincd.\n"
121 " reload Partially reload configuration of running tincd.\n"
122 " pid Show PID of currently running tincd.\n"
123 #ifdef DISABLE_LEGACY
124 " generate-keys Generate a new Ed25519 public/private keypair.\n"
126 " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
127 " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
129 " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
130 " dump Dump a list of one of the following things:\n"
131 " [reachable] nodes - all known nodes in the VPN\n"
132 " edges - all known connections in the VPN\n"
133 " subnets - all known subnets in the VPN\n"
134 " connections - all meta connections with ourself\n"
135 " [di]graph - graph of the VPN in dotty format\n"
136 " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
137 " purge Purge unreachable nodes\n"
138 " debug N Set debug level\n"
139 " retry Retry all outgoing connections\n"
140 " disconnect NODE Close meta connection with NODE\n"
142 " top Show real-time statistics\n"
144 " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
145 " log [level] Dump log output [up to the specified level]\n"
146 " export Export host configuration of local node to standard output\n"
147 " export-all Export all host configuration files to standard output\n"
148 " import [--force] Import host configuration file(s) from standard input\n"
149 " exchange [--force] Same as export followed by import\n"
150 " exchange-all [--force] Same as export-all followed by import\n"
151 " invite NODE [...] Generate an invitation for NODE\n"
152 " join INVITATION Join a VPN using an INVITIATION\n"
153 " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
154 " fsck Check the configuration files for problems.\n"
156 printf("Report bugs to tinc@tinc-vpn.org.\n");
160 static bool parse_options(int argc, char **argv) {
162 int option_index = 0;
164 while((r = getopt_long(argc, argv, "+c:n:", long_options, &option_index)) != EOF) {
166 case 0: /* long option */
173 case 'c': /* config file */
174 confbase = xstrdup(optarg);
175 confbasegiven = true;
178 case 'n': /* net name given */
179 netname = xstrdup(optarg);
182 case 1: /* show help */
186 case 2: /* show version */
190 case 3: /* open control socket here */
191 pidfilename = xstrdup(optarg);
198 case '?': /* wrong options */
207 if(!netname && (netname = getenv("NETNAME")))
208 netname = xstrdup(netname);
210 /* netname "." is special: a "top-level name" */
212 if(netname && (!*netname || !strcmp(netname, "."))) {
217 if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
218 fprintf(stderr, "Invalid character in netname!\n");
225 /* Open a file with the desired permissions, minus the umask.
226 Also, if we want to create an executable file, we call fchmod()
227 to set the executable bits. */
229 FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
230 mode_t mask = umask(0);
233 FILE *f = fopen(filename, mode);
235 if((perms & 0444) && f)
236 fchmod(fileno(f), perms);
242 static void disable_old_keys(const char *filename, const char *what) {
243 char tmpfile[PATH_MAX] = "";
245 bool disabled = false;
250 r = fopen(filename, "r");
254 snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
256 struct stat st = {.st_mode = 0600};
257 fstat(fileno(r), &st);
258 w = fopenmask(tmpfile, "w", st.st_mode);
260 while(fgets(buf, sizeof buf, r)) {
261 if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
262 if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
268 bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
274 if(block || ed25519pubkey)
276 if(fputs(buf, w) < 0) {
282 if(block && !strncmp(buf, "-----END ", 9))
289 if(ferror(r) || fclose(r) < 0)
294 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
301 // We cannot atomically replace files on Windows.
302 char bakfile[PATH_MAX] = "";
303 snprintf(bakfile, sizeof bakfile, "%s.bak", filename);
304 if(rename(filename, bakfile) || rename(tmpfile, filename)) {
305 rename(bakfile, filename);
307 if(rename(tmpfile, filename)) {
309 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
314 fprintf(stderr, "Warning: old key(s) found and disabled.\n");
321 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
327 /* Check stdin and stdout */
329 /* Ask for a file and/or directory name. */
330 fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
332 if(fgets(buf, sizeof buf, stdin) == NULL) {
333 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
337 size_t len = strlen(buf);
346 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
348 if(filename[0] != '/') {
350 /* The directory is a relative path or a filename. */
351 directory = get_current_dir_name();
352 snprintf(buf2, sizeof buf2, "%s" SLASH "%s", directory, filename);
356 disable_old_keys(filename, what);
358 /* Open it first to keep the inode busy */
360 r = fopenmask(filename, mode, perms);
363 fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
371 Generate a public/private Ed25519 keypair, and ask for a file to store
374 static bool ed25519_keygen(bool ask) {
377 char *pubname, *privname;
379 fprintf(stderr, "Generating Ed25519 keypair:\n");
381 if(!(key = ecdsa_generate())) {
382 fprintf(stderr, "Error during key generation!\n");
385 fprintf(stderr, "Done.\n");
387 xasprintf(&privname, "%s" SLASH "ed25519_key.priv", confbase);
388 f = ask_and_open(privname, "private Ed25519 key", "a", ask, 0600);
394 if(!ecdsa_write_pem_private_key(key, f)) {
395 fprintf(stderr, "Error writing private key!\n");
404 xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
406 xasprintf(&pubname, "%s" SLASH "ed25519_key.pub", confbase);
408 f = ask_and_open(pubname, "public Ed25519 key", "a", ask, 0666);
414 char *pubkey = ecdsa_get_base64_public_key(key);
415 fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
424 #ifndef DISABLE_LEGACY
426 Generate a public/private RSA keypair, and ask for a file to store
429 static bool rsa_keygen(int bits, bool ask) {
432 char *pubname, *privname;
434 // Make sure the key size is a multiple of 8 bits.
437 // Force them to be between 1024 and 8192 bits long.
443 fprintf(stderr, "Generating %d bits keys:\n", bits);
445 if(!(key = rsa_generate(bits, 0x10001))) {
446 fprintf(stderr, "Error during key generation!\n");
449 fprintf(stderr, "Done.\n");
451 xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
452 f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
458 if(!rsa_write_pem_private_key(key, f)) {
459 fprintf(stderr, "Error writing private key!\n");
468 xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
470 xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
472 f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
478 if(!rsa_write_pem_public_key(key, f)) {
479 fprintf(stderr, "Error writing public key!\n");
495 bool recvline(int fd, char *line, size_t len) {
496 char *newline = NULL;
501 while(!(newline = memchr(buffer, '\n', blen))) {
502 int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
503 if(result == -1 && sockerrno == EINTR)
510 if(newline - buffer >= len)
513 len = newline - buffer;
515 memcpy(line, buffer, len);
517 memmove(buffer, newline + 1, blen - len - 1);
523 bool recvdata(int fd, char *data, size_t len) {
528 int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
529 if(result == -1 && sockerrno == EINTR)
536 memcpy(data, buffer, len);
537 memmove(buffer, buffer + len, blen - len);
543 bool sendline(int fd, char *format, ...) {
544 static char buffer[4096];
549 va_start(ap, format);
550 blen = vsnprintf(buffer, sizeof buffer, format, ap);
553 if(blen < 1 || blen >= sizeof buffer)
560 int result = send(fd, p, blen, MSG_NOSIGNAL);
561 if(result == -1 && sockerrno == EINTR)
572 static void pcap(int fd, FILE *out, int snaplen) {
573 sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
581 uint32_t tz_accuracy;
588 snaplen ?: sizeof data,
601 fwrite(&header, sizeof header, 1, out);
605 while(recvline(fd, line, sizeof line)) {
607 int n = sscanf(line, "%d %d %d", &code, &req, &len);
608 gettimeofday(&tv, NULL);
609 if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof data)
611 if(!recvdata(fd, data, len))
613 packet.tv_sec = tv.tv_sec;
614 packet.tv_usec = tv.tv_usec;
616 packet.origlen = len;
617 fwrite(&packet, sizeof packet, 1, out);
618 fwrite(data, len, 1, out);
623 static void logcontrol(int fd, FILE *out, int level) {
624 sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
628 while(recvline(fd, line, sizeof line)) {
630 int n = sscanf(line, "%d %d %d", &code, &req, &len);
631 if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof data)
633 if(!recvdata(fd, data, len))
635 fwrite(data, len, 1, out);
642 static bool remove_service(void) {
643 SC_HANDLE manager = NULL;
644 SC_HANDLE service = NULL;
645 SERVICE_STATUS status = {0};
647 manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
649 fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
653 service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
656 fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
660 if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
661 fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
663 fprintf(stderr, "%s service stopped\n", identname);
665 if(!DeleteService(service)) {
666 fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
670 fprintf(stderr, "%s service removed\n", identname);
676 bool connect_tincd(bool verbose) {
681 struct timeval tv = {0, 0};
682 if(select(fd + 1, &r, NULL, NULL, &tv)) {
683 fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
691 FILE *f = fopen(pidfilename, "r");
694 fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
701 if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
703 fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
711 struct sockaddr_un sa;
712 sa.sun_family = AF_UNIX;
713 strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
715 fd = socket(AF_UNIX, SOCK_STREAM, 0);
718 fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
722 if(connect(fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
724 fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
730 struct addrinfo hints = {
731 .ai_family = AF_UNSPEC,
732 .ai_socktype = SOCK_STREAM,
733 .ai_protocol = IPPROTO_TCP,
737 struct addrinfo *res = NULL;
739 if(getaddrinfo(host, port, &hints, &res) || !res) {
741 fprintf(stderr, "Cannot resolve %s port %s: %s", host, port, sockstrerror(sockerrno));
745 fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
748 fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
753 unsigned long arg = 0;
755 if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
757 fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
761 if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
763 fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
773 static const int one = 1;
774 setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof one);
780 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
782 fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
788 sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
790 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
792 fprintf(stderr, "Could not fully establish control socket connection\n");
802 static int cmd_start(int argc, char *argv[]) {
803 if(connect_tincd(false)) {
805 fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
807 fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
812 char *slash = strrchr(program_name, '/');
815 if ((c = strrchr(program_name, '\\')) > slash)
820 xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
825 char **nargv = xzalloc((optind + argc) * sizeof *nargv);
830 Windows has no real concept of an "argv array". A command line is just one string.
831 The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
832 it uses quotes to handle spaces in arguments.
833 Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
834 If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
835 into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
837 xasprintf(&arg0, "\"%s\"", arg0);
839 nargv[nargc++] = arg0;
840 for(int i = 1; i < optind; i++)
841 nargv[nargc++] = orig_argv[i];
842 for(int i = 1; i < argc; i++)
843 nargv[nargc++] = argv[i];
846 int status = spawnvp(_P_WAIT, c, nargv);
848 fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
855 fprintf(stderr, "Could not fork: %s\n", strerror(errno));
861 exit(execvp(c, nargv));
865 int status = -1, result;
867 signal(SIGINT, SIG_IGN);
869 result = waitpid(pid, &status, 0);
871 signal(SIGINT, SIG_DFL);
874 if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
875 fprintf(stderr, "Error starting %s\n", c);
883 static int cmd_stop(int argc, char *argv[]) {
885 fprintf(stderr, "Too many arguments!\n");
890 if(!connect_tincd(true)) {
892 if(kill(pid, SIGTERM)) {
893 fprintf(stderr, "Could not send TERM signal to process with PID %u: %s\n", pid, strerror(errno));
897 fprintf(stderr, "Sent TERM signal to process with PID %u.\n", pid);
898 waitpid(pid, NULL, 0);
905 sendline(fd, "%d %d", CONTROL, REQ_STOP);
907 while(recvline(fd, line, sizeof line)) {
908 // Wait for tincd to close the connection...
911 if(!remove_service())
921 static int cmd_restart(int argc, char *argv[]) {
923 return cmd_start(argc, argv);
926 static int cmd_reload(int argc, char *argv[]) {
928 fprintf(stderr, "Too many arguments!\n");
932 if(!connect_tincd(true))
935 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
936 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
937 fprintf(stderr, "Could not reload configuration.\n");
945 static int cmd_dump(int argc, char *argv[]) {
946 bool only_reachable = false;
948 if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
949 if(strcasecmp(argv[2], "nodes")) {
950 fprintf(stderr, "`reachable' only supported for nodes.\n");
954 only_reachable = true;
960 fprintf(stderr, "Invalid number of arguments.\n");
965 if(!connect_tincd(true))
970 if(!strcasecmp(argv[1], "nodes"))
971 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
972 else if(!strcasecmp(argv[1], "edges"))
973 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
974 else if(!strcasecmp(argv[1], "subnets"))
975 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
976 else if(!strcasecmp(argv[1], "connections"))
977 sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
978 else if(!strcasecmp(argv[1], "graph")) {
979 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
980 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
982 } else if(!strcasecmp(argv[1], "digraph")) {
983 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
984 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
987 fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
994 else if(do_graph == 2)
995 printf("digraph {\n");
997 while(recvline(fd, line, sizeof line)) {
998 char node1[4096], node2[4096];
999 int n = sscanf(line, "%d %d %s %s", &code, &req, node1, node2);
1001 if(do_graph && req == REQ_DUMP_NODES)
1019 char local_host[4096];
1020 char local_port[4096];
1023 int cipher, digest, maclength, compression, distance, socket, weight;
1024 short int pmtu, minmtu, maxmtu;
1025 unsigned int options, status_int;
1026 node_status_t status;
1027 long int last_state_change;
1030 case REQ_DUMP_NODES: {
1031 int n = sscanf(line, "%*d %*d %s %s %s port %s %d %d %d %d %x %x %s %s %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);
1033 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1037 memcpy(&status, &status_int, sizeof status);
1040 const char *color = "black";
1041 if(!strcmp(host, "MYSELF"))
1043 else if(!status.reachable)
1045 else if(strcmp(via, node))
1047 else if(!status.validkey)
1051 printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1053 if(only_reachable && !status.reachable)
1055 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 %hd (min %hd max %hd)\n",
1056 node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
1060 case REQ_DUMP_EDGES: {
1061 int n = sscanf(line, "%*d %*d %s %s %s port %s %s port %s %x %d", from, to, host, port, local_host, local_port, &options, &weight);
1063 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1068 float w = 1 + 65536.0 / weight;
1069 if(do_graph == 1 && strcmp(node1, node2) > 0)
1070 printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
1071 else if(do_graph == 2)
1072 printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
1074 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);
1078 case REQ_DUMP_SUBNETS: {
1079 int n = sscanf(line, "%*d %*d %s %s", subnet, node);
1081 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1084 printf("%s owner %s\n", strip_weight(subnet), node);
1087 case REQ_DUMP_CONNECTIONS: {
1088 int n = sscanf(line, "%*d %*d %s %s port %s %x %d %x", node, host, port, &options, &socket, &status_int);
1090 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1093 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
1097 fprintf(stderr, "Unable to parse dump from tincd.\n");
1102 fprintf(stderr, "Error receiving dump.\n");
1106 static int cmd_purge(int argc, char *argv[]) {
1108 fprintf(stderr, "Too many arguments!\n");
1112 if(!connect_tincd(true))
1115 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1116 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1117 fprintf(stderr, "Could not purge old information.\n");
1124 static int cmd_debug(int argc, char *argv[]) {
1126 fprintf(stderr, "Invalid number of arguments.\n");
1130 if(!connect_tincd(true))
1133 int debuglevel = atoi(argv[1]);
1136 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1137 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1138 fprintf(stderr, "Could not set debug level.\n");
1142 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1146 static int cmd_retry(int argc, char *argv[]) {
1148 fprintf(stderr, "Too many arguments!\n");
1152 if(!connect_tincd(true))
1155 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1156 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1157 fprintf(stderr, "Could not retry outgoing connections.\n");
1164 static int cmd_connect(int argc, char *argv[]) {
1166 fprintf(stderr, "Invalid number of arguments.\n");
1170 if(!check_id(argv[1])) {
1171 fprintf(stderr, "Invalid name for node.\n");
1175 if(!connect_tincd(true))
1178 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1179 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1180 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1187 static int cmd_disconnect(int argc, char *argv[]) {
1189 fprintf(stderr, "Invalid number of arguments.\n");
1193 if(!check_id(argv[1])) {
1194 fprintf(stderr, "Invalid name for node.\n");
1198 if(!connect_tincd(true))
1201 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1202 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1203 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1210 static int cmd_top(int argc, char *argv[]) {
1212 fprintf(stderr, "Too many arguments!\n");
1217 if(!connect_tincd(true))
1223 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1228 static int cmd_pcap(int argc, char *argv[]) {
1230 fprintf(stderr, "Too many arguments!\n");
1234 if(!connect_tincd(true))
1237 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1242 static void sigint_handler(int sig) {
1243 fprintf(stderr, "\n");
1244 shutdown(fd, SHUT_RDWR);
1248 static int cmd_log(int argc, char *argv[]) {
1250 fprintf(stderr, "Too many arguments!\n");
1254 if(!connect_tincd(true))
1258 signal(SIGINT, sigint_handler);
1261 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1264 signal(SIGINT, SIG_DFL);
1272 static int cmd_pid(int argc, char *argv[]) {
1274 fprintf(stderr, "Too many arguments!\n");
1278 if(!connect_tincd(true) && !pid)
1281 printf("%d\n", pid);
1285 int rstrip(char *value) {
1286 int len = strlen(value);
1287 while(len && strchr("\t\r\n ", value[len - 1]))
1292 char *get_my_name(bool verbose) {
1293 FILE *f = fopen(tinc_conf, "r");
1296 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1302 while(fgets(buf, sizeof buf, f)) {
1303 int len = strcspn(buf, "\t =");
1305 value += strspn(value, "\t ");
1308 value += strspn(value, "\t ");
1313 if(strcasecmp(buf, "Name"))
1317 return replace_name(value);
1323 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1327 const var_t variables[] = {
1328 /* Server configuration */
1329 {"AddressFamily", VAR_SERVER},
1330 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1331 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1332 {"BindToInterface", VAR_SERVER},
1333 {"Broadcast", VAR_SERVER | VAR_SAFE},
1334 {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1335 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1336 {"DecrementTTL", VAR_SERVER},
1337 {"Device", VAR_SERVER},
1338 {"DeviceStandby", VAR_SERVER},
1339 {"DeviceType", VAR_SERVER},
1340 {"DirectOnly", VAR_SERVER},
1341 {"Ed25519PrivateKeyFile", VAR_SERVER},
1342 {"ExperimentalProtocol", VAR_SERVER},
1343 {"Forwarding", VAR_SERVER},
1344 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1345 {"Hostnames", VAR_SERVER},
1346 {"IffOneQueue", VAR_SERVER},
1347 {"Interface", VAR_SERVER},
1348 {"KeyExpire", VAR_SERVER},
1349 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1350 {"LocalDiscovery", VAR_SERVER},
1351 {"MACExpire", VAR_SERVER},
1352 {"MaxConnectionBurst", VAR_SERVER},
1353 {"MaxOutputBufferSize", VAR_SERVER},
1354 {"MaxTimeout", VAR_SERVER},
1355 {"Mode", VAR_SERVER | VAR_SAFE},
1356 {"Name", VAR_SERVER},
1357 {"PingInterval", VAR_SERVER},
1358 {"PingTimeout", VAR_SERVER},
1359 {"PriorityInheritance", VAR_SERVER},
1360 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1361 {"PrivateKeyFile", VAR_SERVER},
1362 {"ProcessPriority", VAR_SERVER},
1363 {"Proxy", VAR_SERVER},
1364 {"ReplayWindow", VAR_SERVER},
1365 {"ScriptsExtension", VAR_SERVER},
1366 {"ScriptsInterpreter", VAR_SERVER},
1367 {"StrictSubnets", VAR_SERVER},
1368 {"TunnelServer", VAR_SERVER},
1369 {"UDPDiscovery", VAR_SERVER},
1370 {"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
1371 {"UDPDiscoveryInterval", VAR_SERVER},
1372 {"UDPDiscoveryTimeout", VAR_SERVER},
1373 {"UDPRcvBuf", VAR_SERVER},
1374 {"UDPSndBuf", VAR_SERVER},
1375 {"VDEGroup", VAR_SERVER},
1376 {"VDEPort", VAR_SERVER},
1377 /* Host configuration */
1378 {"Address", VAR_HOST | VAR_MULTIPLE},
1379 {"Cipher", VAR_SERVER | VAR_HOST},
1380 {"ClampMSS", VAR_SERVER | VAR_HOST},
1381 {"Compression", VAR_SERVER | VAR_HOST},
1382 {"Digest", VAR_SERVER | VAR_HOST},
1383 {"Ed25519PublicKey", VAR_HOST},
1384 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1385 {"IndirectData", VAR_SERVER | VAR_HOST},
1386 {"MACLength", VAR_SERVER | VAR_HOST},
1387 {"PMTU", VAR_SERVER | VAR_HOST},
1388 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1390 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1391 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1392 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1393 {"TCPOnly", VAR_SERVER | VAR_HOST},
1394 {"Weight", VAR_HOST | VAR_SAFE},
1398 static int cmd_config(int argc, char *argv[]) {
1400 fprintf(stderr, "Invalid number of arguments.\n");
1404 if(strcasecmp(argv[0], "config"))
1408 if(!strcasecmp(argv[1], "get")) {
1410 } else if(!strcasecmp(argv[1], "add")) {
1411 argv++, argc--, action = 1;
1412 } else if(!strcasecmp(argv[1], "del")) {
1413 argv++, argc--, action = -1;
1414 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1415 argv++, argc--, action = 0;
1419 fprintf(stderr, "Invalid number of arguments.\n");
1423 // Concatenate the rest of the command line
1424 strncpy(line, argv[1], sizeof line - 1);
1425 for(int i = 2; i < argc; i++) {
1426 strncat(line, " ", sizeof line - 1 - strlen(line));
1427 strncat(line, argv[i], sizeof line - 1 - strlen(line));
1430 // Liberal parsing into node name, variable name and value.
1436 len = strcspn(line, "\t =");
1438 value += strspn(value, "\t ");
1441 value += strspn(value, "\t ");
1444 variable = strchr(line, '.');
1453 fprintf(stderr, "No variable given.\n");
1457 if(action >= 0 && !*value) {
1458 fprintf(stderr, "No value for variable given.\n");
1462 if(action < -1 && *value)
1465 /* Some simple checks. */
1467 bool warnonremove = false;
1469 for(int i = 0; variables[i].name; i++) {
1470 if(strcasecmp(variables[i].name, variable))
1474 variable = (char *)variables[i].name;
1476 /* Discourage use of obsolete variables. */
1478 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1480 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1482 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1487 /* Don't put server variables in host config files */
1489 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1491 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1493 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1498 /* Should this go into our own host config file? */
1500 if(!node && !(variables[i].type & VAR_SERVER)) {
1501 node = get_my_name(true);
1506 /* Change "add" into "set" for variables that do not allow multiple occurences.
1507 Turn on warnings when it seems variables might be removed unintentionally. */
1509 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1510 warnonremove = true;
1512 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1513 warnonremove = true;
1519 if(node && !check_id(node)) {
1520 fprintf(stderr, "Invalid name for node.\n");
1525 if(force || action < 0) {
1526 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1528 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1533 // Open the right configuration file.
1536 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, node);
1538 filename = tinc_conf;
1540 FILE *f = fopen(filename, "r");
1542 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1546 char *tmpfile = NULL;
1550 xasprintf(&tmpfile, "%s.config.tmp", filename);
1551 tf = fopen(tmpfile, "w");
1553 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1559 // Copy the file, making modifications on the fly, unless we are just getting a value.
1563 bool removed = false;
1566 while(fgets(buf1, sizeof buf1, f)) {
1567 buf1[sizeof buf1 - 1] = 0;
1568 strncpy(buf2, buf1, sizeof buf2);
1570 // Parse line in a simple way
1574 len = strcspn(buf2, "\t =");
1575 bvalue = buf2 + len;
1576 bvalue += strspn(bvalue, "\t ");
1577 if(*bvalue == '=') {
1579 bvalue += strspn(bvalue, "\t ");
1585 if(!strcasecmp(buf2, variable)) {
1589 printf("%s\n", bvalue);
1591 } else if(action == -1) {
1592 if(!*value || !strcasecmp(bvalue, value)) {
1597 } else if(action == 0) {
1598 // Warn if "set" was used for variables that can occur multiple times
1599 if(warnonremove && strcasecmp(bvalue, value))
1600 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1602 // Already set? Delete the rest...
1606 // Otherwise, replace.
1607 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1608 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1617 // Copy original line...
1618 if(fputs(buf1, tf) < 0) {
1619 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1623 // Add newline if it is missing...
1624 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
1625 if(fputc('\n', tf) < 0) {
1626 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1633 // Make sure we read everything...
1634 if(ferror(f) || !feof(f)) {
1635 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
1640 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
1644 // Add new variable if necessary.
1645 if(action > 0 || (action == 0 && !set)) {
1646 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1647 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1656 fprintf(stderr, "No matching configuration variables found.\n");
1661 // Make sure we wrote everything...
1663 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
1667 // Could we find what we had to remove?
1668 if(action < 0 && !removed) {
1670 fprintf(stderr, "No configuration variables deleted.\n");
1674 // Replace the configuration file with the new one
1676 if(remove(filename)) {
1677 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
1681 if(rename(tmpfile, filename)) {
1682 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
1686 // Silently try notifying a running tincd of changes.
1687 if(connect_tincd(false))
1688 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1693 static bool try_bind(int port) {
1694 struct addrinfo *ai = NULL;
1695 struct addrinfo hint = {
1696 .ai_flags = AI_PASSIVE,
1697 .ai_family = AF_UNSPEC,
1698 .ai_socktype = SOCK_STREAM,
1699 .ai_protocol = IPPROTO_TCP,
1703 snprintf(portstr, sizeof portstr, "%d", port);
1705 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
1709 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
1712 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
1722 int check_port(char *name) {
1726 fprintf(stderr, "Warning: could not bind to port 655. ");
1728 for(int i = 0; i < 100; i++) {
1729 int port = 0x1000 + (rand() & 0x7fff);
1730 if(try_bind(port)) {
1732 xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
1733 FILE *f = fopen(filename, "a");
1736 fprintf(stderr, "Please change tinc's Port manually.\n");
1740 fprintf(f, "Port = %d\n", port);
1742 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
1747 fprintf(stderr, "Please change tinc's Port manually.\n");
1751 static int cmd_init(int argc, char *argv[]) {
1752 if(!access(tinc_conf, F_OK)) {
1753 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
1758 fprintf(stderr, "Too many arguments!\n");
1760 } else if(argc < 2) {
1763 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
1764 if(!fgets(buf, sizeof buf, stdin)) {
1765 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
1768 int len = rstrip(buf);
1770 fprintf(stderr, "No name given!\n");
1775 fprintf(stderr, "No Name given!\n");
1779 name = strdup(argv[1]);
1781 fprintf(stderr, "No Name given!\n");
1786 if(!check_id(name)) {
1787 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
1791 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
1792 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
1796 if(mkdir(confbase, 0777) && errno != EEXIST) {
1797 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
1801 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
1802 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
1806 FILE *f = fopen(tinc_conf, "w");
1808 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
1812 fprintf(f, "Name = %s\n", name);
1815 #ifndef DISABLE_LEGACY
1816 if(!rsa_keygen(2048, false))
1820 if(!ed25519_keygen(false))
1827 xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
1828 if(access(filename, F_OK)) {
1829 FILE *f = fopenmask(filename, "w", 0777);
1831 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
1834 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");
1843 static int cmd_generate_keys(int argc, char *argv[]) {
1844 #ifdef DISABLE_LEGACY
1849 fprintf(stderr, "Too many arguments!\n");
1854 name = get_my_name(false);
1856 #ifndef DISABLE_LEGACY
1857 if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true))
1861 if(!ed25519_keygen(true))
1867 #ifndef DISABLE_LEGACY
1868 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
1870 fprintf(stderr, "Too many arguments!\n");
1875 name = get_my_name(false);
1877 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
1881 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
1883 fprintf(stderr, "Too many arguments!\n");
1888 name = get_my_name(false);
1890 return !ed25519_keygen(true);
1893 static int cmd_help(int argc, char *argv[]) {
1898 static int cmd_version(int argc, char *argv[]) {
1900 fprintf(stderr, "Too many arguments!\n");
1908 static int cmd_info(int argc, char *argv[]) {
1910 fprintf(stderr, "Invalid number of arguments.\n");
1914 if(!connect_tincd(true))
1917 return info(fd, argv[1]);
1920 static const char *conffiles[] = {
1931 static int cmd_edit(int argc, char *argv[]) {
1933 fprintf(stderr, "Invalid number of arguments.\n");
1937 char *filename = NULL;
1939 if(strncmp(argv[1], "hosts" SLASH, 6)) {
1940 for(int i = 0; conffiles[i]; i++) {
1941 if(!strcmp(argv[1], conffiles[i])) {
1942 xasprintf(&filename, "%s" SLASH "%s", confbase, argv[1]);
1951 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, argv[1]);
1952 char *dash = strchr(argv[1], '-');
1955 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
1956 fprintf(stderr, "Invalid configuration filename.\n");
1964 xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ?: getenv("EDITOR") ?: "vi", filename);
1966 xasprintf(&command, "edit \"%s\"", filename);
1968 int result = system(command);
1972 // Silently try notifying a running tincd of changes.
1973 if(connect_tincd(false))
1974 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1979 static int export(const char *name, FILE *out) {
1981 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
1982 FILE *in = fopen(filename, "r");
1984 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1988 fprintf(out, "Name = %s\n", name);
1990 while(fgets(buf, sizeof buf, in)) {
1991 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4))
1996 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
2005 static int cmd_export(int argc, char *argv[]) {
2007 fprintf(stderr, "Too many arguments!\n");
2011 char *name = get_my_name(true);
2015 int result = export(name, stdout);
2023 static int cmd_export_all(int argc, char *argv[]) {
2025 fprintf(stderr, "Too many arguments!\n");
2029 DIR *dir = opendir(hosts_dir);
2031 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
2039 while((ent = readdir(dir))) {
2040 if(!check_id(ent->d_name))
2046 printf("#---------------------------------------------------------------#\n");
2048 result |= export(ent->d_name, stdout);
2057 static int cmd_import(int argc, char *argv[]) {
2059 fprintf(stderr, "Too many arguments!\n");
2068 char *filename = NULL;
2070 bool firstline = true;
2072 while(fgets(buf, sizeof buf, in)) {
2073 if(sscanf(buf, "Name = %s", name) == 1) {
2076 if(!check_id(name)) {
2077 fprintf(stderr, "Invalid Name in input!\n");
2085 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
2087 if(!force && !access(filename, F_OK)) {
2088 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2093 out = fopen(filename, "w");
2095 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2101 } else if(firstline) {
2102 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2107 if(!strcmp(buf, "#---------------------------------------------------------------#\n"))
2111 if(fputs(buf, out) < 0) {
2112 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2122 fprintf(stderr, "Imported %d host configuration files.\n", count);
2125 fprintf(stderr, "No host configuration files imported.\n");
2130 static int cmd_exchange(int argc, char *argv[]) {
2131 return cmd_export(argc, argv) ?: cmd_import(argc, argv);
2134 static int cmd_exchange_all(int argc, char *argv[]) {
2135 return cmd_export_all(argc, argv) ?: cmd_import(argc, argv);
2138 static int switch_network(char *name) {
2150 free(unixsocketname);
2151 unixsocketname = NULL;
2157 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2159 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2160 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2161 xasprintf(&prompt, "%s> ", identname);
2166 static int cmd_network(int argc, char *argv[]) {
2168 fprintf(stderr, "Too many arguments!\n");
2173 return switch_network(argv[1]);
2175 DIR *dir = opendir(confdir);
2177 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2182 while((ent = readdir(dir))) {
2183 if(*ent->d_name == '.')
2186 if(!strcmp(ent->d_name, "tinc.conf")) {
2192 xasprintf(&fname, "%s/%s/tinc.conf", confdir, ent->d_name);
2193 if(!access(fname, R_OK))
2194 printf("%s\n", ent->d_name);
2203 static int cmd_fsck(int argc, char *argv[]) {
2205 fprintf(stderr, "Too many arguments!\n");
2209 return fsck(orig_argv[0]);
2212 static const struct {
2213 const char *command;
2214 int (*function)(int argc, char *argv[]);
2217 {"start", cmd_start},
2219 {"restart", cmd_restart},
2220 {"reload", cmd_reload},
2222 {"purge", cmd_purge},
2223 {"debug", cmd_debug},
2224 {"retry", cmd_retry},
2225 {"connect", cmd_connect},
2226 {"disconnect", cmd_disconnect},
2231 {"config", cmd_config, true},
2232 {"add", cmd_config},
2233 {"del", cmd_config},
2234 {"get", cmd_config},
2235 {"set", cmd_config},
2237 {"generate-keys", cmd_generate_keys},
2238 #ifndef DISABLE_LEGACY
2239 {"generate-rsa-keys", cmd_generate_rsa_keys},
2241 {"generate-ed25519-keys", cmd_generate_ed25519_keys},
2243 {"version", cmd_version},
2246 {"export", cmd_export},
2247 {"export-all", cmd_export_all},
2248 {"import", cmd_import},
2249 {"exchange", cmd_exchange},
2250 {"exchange-all", cmd_exchange_all},
2251 {"invite", cmd_invite},
2253 {"network", cmd_network},
2258 #ifdef HAVE_READLINE
2259 static char *complete_command(const char *text, int state) {
2267 while(commands[i].command) {
2268 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text)))
2269 return xstrdup(commands[i].command);
2276 static char *complete_dump(const char *text, int state) {
2277 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
2286 if(!strncasecmp(matches[i], text, strlen(text)))
2287 return xstrdup(matches[i]);
2294 static char *complete_config(const char *text, int state) {
2302 while(variables[i].name) {
2303 char *dot = strchr(text, '.');
2305 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
2307 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
2311 if(!strncasecmp(variables[i].name, text, strlen(text)))
2312 return xstrdup(variables[i].name);
2320 static char *complete_info(const char *text, int state) {
2324 if(!connect_tincd(false))
2326 // Check the list of nodes
2327 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
2328 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
2331 while(recvline(fd, line, sizeof line)) {
2333 int n = sscanf(line, "%d %d %s", &code, &req, item);
2343 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
2347 if(!strncmp(item, text, strlen(text)))
2348 return xstrdup(strip_weight(item));
2354 static char *complete_nothing(const char *text, int state) {
2358 static char **completion (const char *text, int start, int end) {
2359 char **matches = NULL;
2362 matches = rl_completion_matches(text, complete_command);
2363 else if(!strncasecmp(rl_line_buffer, "dump ", 5))
2364 matches = rl_completion_matches(text, complete_dump);
2365 else if(!strncasecmp(rl_line_buffer, "add ", 4))
2366 matches = rl_completion_matches(text, complete_config);
2367 else if(!strncasecmp(rl_line_buffer, "del ", 4))
2368 matches = rl_completion_matches(text, complete_config);
2369 else if(!strncasecmp(rl_line_buffer, "get ", 4))
2370 matches = rl_completion_matches(text, complete_config);
2371 else if(!strncasecmp(rl_line_buffer, "set ", 4))
2372 matches = rl_completion_matches(text, complete_config);
2373 else if(!strncasecmp(rl_line_buffer, "info ", 5))
2374 matches = rl_completion_matches(text, complete_info);
2380 static int cmd_shell(int argc, char *argv[]) {
2381 xasprintf(&prompt, "%s> ", identname);
2385 int maxargs = argc + 16;
2386 char **nargv = xmalloc(maxargs * sizeof *nargv);
2388 for(int i = 0; i < argc; i++)
2391 #ifdef HAVE_READLINE
2392 rl_readline_name = "tinc";
2393 rl_completion_entry_function = complete_nothing;
2394 rl_attempted_completion_function = completion;
2395 rl_filename_completion_desired = 0;
2400 #ifdef HAVE_READLINE
2404 rl_basic_word_break_characters = "\t\n ";
2405 line = readline(prompt);
2407 copy = xstrdup(line);
2409 line = fgets(buf, sizeof buf, stdin);
2413 fputs(prompt, stdout);
2415 line = fgets(buf, sizeof buf, stdin);
2421 /* Ignore comments */
2429 char *p = line + strspn(line, " \t\n");
2430 char *next = strtok(p, " \t\n");
2433 if(nargc >= maxargs) {
2434 fprintf(stderr, "next %p '%s', p %p '%s'\n", next, next, p, p);
2437 nargv = xrealloc(nargv, maxargs * sizeof *nargv);
2442 next = strtok(NULL, " \t\n");
2448 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit"))
2453 for(int i = 0; commands[i].command; i++) {
2454 if(!strcasecmp(nargv[argc], commands[i].command)) {
2455 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
2461 #ifdef HAVE_READLINE
2467 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
2480 int main(int argc, char *argv[]) {
2481 program_name = argv[0];
2484 tty = isatty(0) && isatty(1);
2486 if(!parse_options(argc, argv))
2490 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2491 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2504 static struct WSAData wsa_state;
2506 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
2507 fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
2516 return cmd_shell(argc, argv);
2518 for(int i = 0; commands[i].command; i++) {
2519 if(!strcasecmp(argv[optind], commands[i].command))
2520 return commands[i].function(argc - optind, argv + optind);
2523 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);