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"
35 #include "invitation.h"
44 #define MSG_NOSIGNAL 0
47 static char **orig_argv;
50 /* If nonzero, display usage information and exit. */
51 static bool show_help = false;
53 /* If nonzero, print the version on standard output and exit. */
54 static bool show_version = false;
56 static char *name = NULL;
57 static char controlcookie[1025];
58 char *tinc_conf = NULL;
59 char *hosts_dir = NULL;
62 // Horrible global variables...
69 static bool force = false;
71 bool confbasegiven = false;
72 bool netnamegiven = false;
73 char *scriptinterpreter = NULL;
74 char *scriptextension = "";
77 static struct option const long_options[] = {
78 {"config", required_argument, NULL, 'c'},
79 {"net", required_argument, NULL, 'n'},
80 {"help", no_argument, NULL, 1},
81 {"version", no_argument, NULL, 2},
82 {"pidfile", required_argument, NULL, 3},
83 {"force", no_argument, NULL, 4},
87 static void version(void) {
88 printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
89 BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
90 printf("Copyright (C) 1998-2012 Ivo Timmermans, Guus Sliepen and others.\n"
91 "See the AUTHORS file for a complete list.\n\n"
92 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
93 "and you are welcome to redistribute it under certain conditions;\n"
94 "see the file COPYING for details.\n");
97 static void usage(bool status) {
99 fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
101 printf("Usage: %s [options] command\n\n", program_name);
102 printf("Valid options are:\n"
103 " -c, --config=DIR Read configuration options from DIR.\n"
104 " -n, --net=NETNAME Connect to net NETNAME.\n"
105 " --pidfile=FILENAME Read control cookie from FILENAME.\n"
106 " --help Display this help and exit.\n"
107 " --version Output version information and exit.\n"
109 "Valid commands are:\n"
110 " init [name] Create initial configuration files.\n"
111 " get VARIABLE Print current value of VARIABLE\n"
112 " set VARIABLE VALUE Set VARIABLE to VALUE\n"
113 " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
114 " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
115 " start [tincd options] Start tincd.\n"
116 " stop Stop tincd.\n"
117 " restart [tincd options] Restart tincd.\n"
118 " reload Partially reload configuration of running tincd.\n"
119 " pid Show PID of currently running tincd.\n"
120 " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
121 " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
122 " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
123 " dump Dump a list of one of the following things:\n"
124 " [reachable] nodes - all known nodes in the VPN\n"
125 " edges - all known connections in the VPN\n"
126 " subnets - all known subnets in the VPN\n"
127 " connections - all meta connections with ourself\n"
128 " [di]graph - graph of the VPN in dotty format\n"
129 " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
130 " purge Purge unreachable nodes\n"
131 " debug N Set debug level\n"
132 " retry Retry all outgoing connections\n"
133 " disconnect NODE Close meta connection with NODE\n"
135 " top Show real-time statistics\n"
137 " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
138 " log [level] Dump log output [up to the specified level]\n"
139 " export Export host configuration of local node to standard output\n"
140 " export-all Export all host configuration files to standard output\n"
141 " import [--force] Import host configuration file(s) from standard input\n"
142 " exchange [--force] Same as export followed by import\n"
143 " exchange-all [--force] Same as export-all followed by import\n"
144 " invite NODE [...] Generate an invitation for NODE\n"
145 " join INVITATION Join a VPN using an INVITIATION\n"
146 " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
148 printf("Report bugs to tinc@tinc-vpn.org.\n");
152 static bool parse_options(int argc, char **argv) {
154 int option_index = 0;
156 while((r = getopt_long(argc, argv, "+c:n:", long_options, &option_index)) != EOF) {
158 case 0: /* long option */
161 case 'c': /* config file */
162 confbase = xstrdup(optarg);
163 confbasegiven = true;
166 case 'n': /* net name given */
167 netname = xstrdup(optarg);
170 case 1: /* show help */
174 case 2: /* show version */
178 case 3: /* open control socket here */
179 pidfilename = xstrdup(optarg);
186 case '?': /* wrong options */
195 if(!netname && (netname = getenv("NETNAME")))
196 netname = xstrdup(netname);
198 /* netname "." is special: a "top-level name" */
200 if(netname && (!*netname || !strcmp(netname, "."))) {
205 if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
206 fprintf(stderr, "Invalid character in netname!\n");
213 /* Open a file with the desired permissions, minus the umask.
214 Also, if we want to create an executable file, we call fchmod()
215 to set the executable bits. */
217 FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
218 mode_t mask = umask(0);
221 FILE *f = fopen(filename, mode);
223 if((perms & 0444) && f)
224 fchmod(fileno(f), perms);
230 static void disable_old_keys(const char *filename, const char *what) {
231 char tmpfile[PATH_MAX] = "";
233 bool disabled = false;
238 r = fopen(filename, "r");
242 snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
244 struct stat st = {.st_mode = 0600};
245 fstat(fileno(r), &st);
246 w = fopenmask(tmpfile, "w", st.st_mode);
248 while(fgets(buf, sizeof buf, r)) {
249 if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
250 if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
256 bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
262 if(block || ed25519pubkey)
264 if(fputs(buf, w) < 0) {
270 if(block && !strncmp(buf, "-----END ", 9))
277 if(ferror(r) || fclose(r) < 0)
282 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
289 // We cannot atomically replace files on Windows.
290 char bakfile[PATH_MAX] = "";
291 snprintf(bakfile, sizeof bakfile, "%s.bak", filename);
292 if(rename(filename, bakfile) || rename(tmpfile, filename)) {
293 rename(bakfile, filename);
295 if(rename(tmpfile, filename)) {
297 fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
302 fprintf(stderr, "Warning: old key(s) found and disabled.\n");
309 static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
315 /* Check stdin and stdout */
317 /* Ask for a file and/or directory name. */
318 fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
320 if(fgets(buf, sizeof buf, stdin) == NULL) {
321 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
325 size_t len = strlen(buf);
334 if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
336 if(filename[0] != '/') {
338 /* The directory is a relative path or a filename. */
339 directory = get_current_dir_name();
340 snprintf(buf2, sizeof buf2, "%s" SLASH "%s", directory, filename);
344 disable_old_keys(filename, what);
346 /* Open it first to keep the inode busy */
348 r = fopenmask(filename, mode, perms);
351 fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
359 Generate a public/private Ed25519 keypair, and ask for a file to store
362 static bool ed25519_keygen(bool ask) {
365 char *pubname, *privname;
367 fprintf(stderr, "Generating Ed25519 keypair:\n");
369 if(!(key = ecdsa_generate())) {
370 fprintf(stderr, "Error during key generation!\n");
373 fprintf(stderr, "Done.\n");
375 xasprintf(&privname, "%s" SLASH "ed25519_key.priv", confbase);
376 f = ask_and_open(privname, "private Ed25519 key", "a", ask, 0600);
382 if(!ecdsa_write_pem_private_key(key, f)) {
383 fprintf(stderr, "Error writing private key!\n");
392 xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
394 xasprintf(&pubname, "%s" SLASH "ed25519_key.pub", confbase);
396 f = ask_and_open(pubname, "public Ed25519 key", "a", ask, 0666);
402 char *pubkey = ecdsa_get_base64_public_key(key);
403 fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
413 Generate a public/private RSA keypair, and ask for a file to store
416 static bool rsa_keygen(int bits, bool ask) {
419 char *pubname, *privname;
421 // Make sure the key size is a multiple of 8 bits.
424 // Force them to be between 1024 and 8192 bits long.
430 fprintf(stderr, "Generating %d bits keys:\n", bits);
432 if(!(key = rsa_generate(bits, 0x10001))) {
433 fprintf(stderr, "Error during key generation!\n");
436 fprintf(stderr, "Done.\n");
438 xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
439 f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
445 if(!rsa_write_pem_private_key(key, f)) {
446 fprintf(stderr, "Error writing private key!\n");
455 xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
457 xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
459 f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
465 if(!rsa_write_pem_public_key(key, f)) {
466 fprintf(stderr, "Error writing public key!\n");
481 bool recvline(int fd, char *line, size_t len) {
482 char *newline = NULL;
487 while(!(newline = memchr(buffer, '\n', blen))) {
488 int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
489 if(result == -1 && sockerrno == EINTR)
496 if(newline - buffer >= len)
499 len = newline - buffer;
501 memcpy(line, buffer, len);
503 memmove(buffer, newline + 1, blen - len - 1);
509 bool recvdata(int fd, char *data, size_t len) {
514 int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
515 if(result == -1 && sockerrno == EINTR)
522 memcpy(data, buffer, len);
523 memmove(buffer, buffer + len, blen - len);
529 bool sendline(int fd, char *format, ...) {
530 static char buffer[4096];
535 va_start(ap, format);
536 blen = vsnprintf(buffer, sizeof buffer, format, ap);
539 if(blen < 1 || blen >= sizeof buffer)
546 int result = send(fd, p, blen, MSG_NOSIGNAL);
547 if(result == -1 && sockerrno == EINTR)
558 static void pcap(int fd, FILE *out, int snaplen) {
559 sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
567 uint32_t tz_accuracy;
574 snaplen ?: sizeof data,
587 fwrite(&header, sizeof header, 1, out);
591 while(recvline(fd, line, sizeof line)) {
593 int n = sscanf(line, "%d %d %d", &code, &req, &len);
594 gettimeofday(&tv, NULL);
595 if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof data)
597 if(!recvdata(fd, data, len))
599 packet.tv_sec = tv.tv_sec;
600 packet.tv_usec = tv.tv_usec;
602 packet.origlen = len;
603 fwrite(&packet, sizeof packet, 1, out);
604 fwrite(data, len, 1, out);
609 static void logcontrol(int fd, FILE *out, int level) {
610 sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
614 while(recvline(fd, line, sizeof line)) {
616 int n = sscanf(line, "%d %d %d", &code, &req, &len);
617 if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof data)
619 if(!recvdata(fd, data, len))
621 fwrite(data, len, 1, out);
628 static bool remove_service(void) {
629 SC_HANDLE manager = NULL;
630 SC_HANDLE service = NULL;
631 SERVICE_STATUS status = {0};
633 manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
635 fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
639 service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
642 fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
646 if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
647 fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
649 fprintf(stderr, "%s service stopped\n", identname);
651 if(!DeleteService(service)) {
652 fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
656 fprintf(stderr, "%s service removed\n", identname);
662 bool connect_tincd(bool verbose) {
667 struct timeval tv = {0, 0};
668 if(select(fd + 1, &r, NULL, NULL, &tv)) {
669 fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
677 FILE *f = fopen(pidfilename, "r");
680 fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
687 if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
689 fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
697 struct sockaddr_un sa;
698 sa.sun_family = AF_UNIX;
699 strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
701 fd = socket(AF_UNIX, SOCK_STREAM, 0);
704 fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
708 if(connect(fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
710 fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
716 struct addrinfo hints = {
717 .ai_family = AF_UNSPEC,
718 .ai_socktype = SOCK_STREAM,
719 .ai_protocol = IPPROTO_TCP,
723 struct addrinfo *res = NULL;
725 if(getaddrinfo(host, port, &hints, &res) || !res) {
727 fprintf(stderr, "Cannot resolve %s port %s: %s", host, port, sockstrerror(sockerrno));
731 fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
734 fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
739 unsigned long arg = 0;
741 if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
743 fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
747 if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
749 fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
759 static const int one = 1;
760 setsockopt(c, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof one);
766 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
768 fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
774 sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
776 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
778 fprintf(stderr, "Could not fully establish control socket connection\n");
788 static int cmd_start(int argc, char *argv[]) {
789 if(connect_tincd(false)) {
791 fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
793 fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
798 char *slash = strrchr(program_name, '/');
801 if ((c = strrchr(program_name, '\\')) > slash)
806 xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
811 char **nargv = xzalloc((optind + argc) * sizeof *nargv);
814 for(int i = 1; i < optind; i++)
815 nargv[nargc++] = orig_argv[i];
816 for(int i = 1; i < argc; i++)
817 nargv[nargc++] = argv[i];
821 fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
826 fprintf(stderr, "Could not fork: %s\n", strerror(errno));
832 exit(execvp(c, nargv));
836 int status = -1, result;
838 signal(SIGINT, SIG_IGN);
840 result = waitpid(pid, &status, 0);
842 signal(SIGINT, SIG_DFL);
845 if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
846 fprintf(stderr, "Error starting %s\n", c);
854 static int cmd_stop(int argc, char *argv[]) {
856 fprintf(stderr, "Too many arguments!\n");
861 if(!connect_tincd(true)) {
863 if(kill(pid, SIGTERM)) {
864 fprintf(stderr, "Could not send TERM signal to process with PID %u: %s\n", pid, strerror(errno));
868 fprintf(stderr, "Sent TERM signal to process with PID %u.\n", pid);
869 waitpid(pid, NULL, 0);
876 sendline(fd, "%d %d", CONTROL, REQ_STOP);
878 while(recvline(fd, line, sizeof line)) {
879 // Wait for tincd to close the connection...
882 if(!remove_service())
892 static int cmd_restart(int argc, char *argv[]) {
894 return cmd_start(argc, argv);
897 static int cmd_reload(int argc, char *argv[]) {
899 fprintf(stderr, "Too many arguments!\n");
903 if(!connect_tincd(true))
906 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
907 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
908 fprintf(stderr, "Could not reload configuration.\n");
916 static int cmd_dump(int argc, char *argv[]) {
917 bool only_reachable = false;
919 if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
920 if(strcasecmp(argv[2], "nodes")) {
921 fprintf(stderr, "`reachable' only supported for nodes.\n");
925 only_reachable = true;
931 fprintf(stderr, "Invalid number of arguments.\n");
936 if(!connect_tincd(true))
941 if(!strcasecmp(argv[1], "nodes"))
942 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
943 else if(!strcasecmp(argv[1], "edges"))
944 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
945 else if(!strcasecmp(argv[1], "subnets"))
946 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
947 else if(!strcasecmp(argv[1], "connections"))
948 sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
949 else if(!strcasecmp(argv[1], "graph")) {
950 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
951 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
953 } else if(!strcasecmp(argv[1], "digraph")) {
954 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
955 sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
958 fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
965 else if(do_graph == 2)
966 printf("digraph {\n");
968 while(recvline(fd, line, sizeof line)) {
969 char node1[4096], node2[4096];
970 int n = sscanf(line, "%d %d %s %s", &code, &req, node1, node2);
972 if(do_graph && req == REQ_DUMP_NODES)
989 char local_host[4096];
990 char local_port[4096];
993 int cipher, digest, maclength, compression, distance, socket, weight;
994 short int pmtu, minmtu, maxmtu;
995 unsigned int options, status_int;
996 node_status_t status;
997 long int last_state_change;
1000 case REQ_DUMP_NODES: {
1001 int n = sscanf(line, "%*d %*d %s %s port %s %d %d %d %d %x %x %s %s %d %hd %hd %hd %ld", node, host, port, &cipher, &digest, &maclength, &compression, &options, &status_int, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
1003 fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
1007 memcpy(&status, &status_int, sizeof status);
1010 const char *color = "black";
1011 if(!strcmp(host, "MYSELF"))
1013 else if(!status.reachable)
1015 else if(strcmp(via, node))
1017 else if(!status.validkey)
1021 printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
1023 if(only_reachable && !status.reachable)
1025 printf("%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",
1026 node, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
1030 case REQ_DUMP_EDGES: {
1031 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);
1033 fprintf(stderr, "Unable to parse edge dump from tincd.\n");
1038 float w = 1 + 65536.0 / weight;
1039 if(do_graph == 1 && strcmp(node1, node2) > 0)
1040 printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
1041 else if(do_graph == 2)
1042 printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
1044 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);
1048 case REQ_DUMP_SUBNETS: {
1049 int n = sscanf(line, "%*d %*d %s %s", subnet, node);
1051 fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
1054 printf("%s owner %s\n", strip_weight(subnet), node);
1057 case REQ_DUMP_CONNECTIONS: {
1058 int n = sscanf(line, "%*d %*d %s %s port %s %x %d %x", node, host, port, &options, &socket, &status_int);
1060 fprintf(stderr, "Unable to parse connection dump from tincd.\n");
1063 printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
1067 fprintf(stderr, "Unable to parse dump from tincd.\n");
1072 fprintf(stderr, "Error receiving dump.\n");
1076 static int cmd_purge(int argc, char *argv[]) {
1078 fprintf(stderr, "Too many arguments!\n");
1082 if(!connect_tincd(true))
1085 sendline(fd, "%d %d", CONTROL, REQ_PURGE);
1086 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
1087 fprintf(stderr, "Could not purge old information.\n");
1094 static int cmd_debug(int argc, char *argv[]) {
1096 fprintf(stderr, "Invalid number of arguments.\n");
1100 if(!connect_tincd(true))
1103 int debuglevel = atoi(argv[1]);
1106 sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
1107 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
1108 fprintf(stderr, "Could not set debug level.\n");
1112 fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
1116 static int cmd_retry(int argc, char *argv[]) {
1118 fprintf(stderr, "Too many arguments!\n");
1122 if(!connect_tincd(true))
1125 sendline(fd, "%d %d", CONTROL, REQ_RETRY);
1126 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
1127 fprintf(stderr, "Could not retry outgoing connections.\n");
1134 static int cmd_connect(int argc, char *argv[]) {
1136 fprintf(stderr, "Invalid number of arguments.\n");
1140 if(!check_id(argv[1])) {
1141 fprintf(stderr, "Invalid name for node.\n");
1145 if(!connect_tincd(true))
1148 sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
1149 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
1150 fprintf(stderr, "Could not connect to %s.\n", argv[1]);
1157 static int cmd_disconnect(int argc, char *argv[]) {
1159 fprintf(stderr, "Invalid number of arguments.\n");
1163 if(!check_id(argv[1])) {
1164 fprintf(stderr, "Invalid name for node.\n");
1168 if(!connect_tincd(true))
1171 sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
1172 if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
1173 fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
1180 static int cmd_top(int argc, char *argv[]) {
1182 fprintf(stderr, "Too many arguments!\n");
1187 if(!connect_tincd(true))
1193 fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
1198 static int cmd_pcap(int argc, char *argv[]) {
1200 fprintf(stderr, "Too many arguments!\n");
1204 if(!connect_tincd(true))
1207 pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
1212 static void sigint_handler(int sig) {
1213 fprintf(stderr, "\n");
1214 shutdown(fd, SHUT_RDWR);
1218 static int cmd_log(int argc, char *argv[]) {
1220 fprintf(stderr, "Too many arguments!\n");
1224 if(!connect_tincd(true))
1228 signal(SIGINT, sigint_handler);
1231 logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
1234 signal(SIGINT, SIG_DFL);
1242 static int cmd_pid(int argc, char *argv[]) {
1244 fprintf(stderr, "Too many arguments!\n");
1248 if(!connect_tincd(true) && !pid)
1251 printf("%d\n", pid);
1255 int rstrip(char *value) {
1256 int len = strlen(value);
1257 while(len && strchr("\t\r\n ", value[len - 1]))
1262 char *get_my_name(bool verbose) {
1263 FILE *f = fopen(tinc_conf, "r");
1266 fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
1272 while(fgets(buf, sizeof buf, f)) {
1273 int len = strcspn(buf, "\t =");
1275 value += strspn(value, "\t ");
1278 value += strspn(value, "\t ");
1283 if(strcasecmp(buf, "Name"))
1287 return strdup(value);
1293 fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
1297 const var_t variables[] = {
1298 /* Server configuration */
1299 {"AddressFamily", VAR_SERVER},
1300 {"AutoConnect", VAR_SERVER | VAR_SAFE},
1301 {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
1302 {"BindToInterface", VAR_SERVER},
1303 {"Broadcast", VAR_SERVER | VAR_SAFE},
1304 {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
1305 {"DecrementTTL", VAR_SERVER},
1306 {"Device", VAR_SERVER},
1307 {"DeviceType", VAR_SERVER},
1308 {"DirectOnly", VAR_SERVER},
1309 {"Ed25519PrivateKeyFile", VAR_SERVER},
1310 {"ExperimentalProtocol", VAR_SERVER},
1311 {"Forwarding", VAR_SERVER},
1312 {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
1313 {"Hostnames", VAR_SERVER},
1314 {"IffOneQueue", VAR_SERVER},
1315 {"Interface", VAR_SERVER},
1316 {"KeyExpire", VAR_SERVER},
1317 {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
1318 {"LocalDiscovery", VAR_SERVER},
1319 {"MACExpire", VAR_SERVER},
1320 {"MaxConnectionBurst", VAR_SERVER},
1321 {"MaxOutputBufferSize", VAR_SERVER},
1322 {"MaxTimeout", VAR_SERVER},
1323 {"Mode", VAR_SERVER | VAR_SAFE},
1324 {"Name", VAR_SERVER},
1325 {"PingInterval", VAR_SERVER},
1326 {"PingTimeout", VAR_SERVER},
1327 {"PriorityInheritance", VAR_SERVER},
1328 {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
1329 {"PrivateKeyFile", VAR_SERVER},
1330 {"ProcessPriority", VAR_SERVER},
1331 {"Proxy", VAR_SERVER},
1332 {"ReplayWindow", VAR_SERVER},
1333 {"ScriptsExtension", VAR_SERVER},
1334 {"ScriptsInterpreter", VAR_SERVER},
1335 {"StrictSubnets", VAR_SERVER},
1336 {"TunnelServer", VAR_SERVER},
1337 {"UDPRcvBuf", VAR_SERVER},
1338 {"UDPSndBuf", VAR_SERVER},
1339 {"VDEGroup", VAR_SERVER},
1340 {"VDEPort", VAR_SERVER},
1341 /* Host configuration */
1342 {"Address", VAR_HOST | VAR_MULTIPLE},
1343 {"Cipher", VAR_SERVER | VAR_HOST},
1344 {"ClampMSS", VAR_SERVER | VAR_HOST},
1345 {"Compression", VAR_SERVER | VAR_HOST},
1346 {"Digest", VAR_SERVER | VAR_HOST},
1347 {"Ed25519PublicKey", VAR_HOST},
1348 {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
1349 {"IndirectData", VAR_SERVER | VAR_HOST},
1350 {"MACLength", VAR_SERVER | VAR_HOST},
1351 {"PMTU", VAR_SERVER | VAR_HOST},
1352 {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
1354 {"PublicKey", VAR_HOST | VAR_OBSOLETE},
1355 {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
1356 {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
1357 {"TCPOnly", VAR_SERVER | VAR_HOST},
1358 {"Weight", VAR_HOST | VAR_SAFE},
1362 static int cmd_config(int argc, char *argv[]) {
1364 fprintf(stderr, "Invalid number of arguments.\n");
1368 if(strcasecmp(argv[0], "config"))
1372 if(!strcasecmp(argv[1], "get")) {
1374 } else if(!strcasecmp(argv[1], "add")) {
1375 argv++, argc--, action = 1;
1376 } else if(!strcasecmp(argv[1], "del")) {
1377 argv++, argc--, action = -1;
1378 } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
1379 argv++, argc--, action = 0;
1383 fprintf(stderr, "Invalid number of arguments.\n");
1387 // Concatenate the rest of the command line
1388 strncpy(line, argv[1], sizeof line - 1);
1389 for(int i = 2; i < argc; i++) {
1390 strncat(line, " ", sizeof line - 1 - strlen(line));
1391 strncat(line, argv[i], sizeof line - 1 - strlen(line));
1394 // Liberal parsing into node name, variable name and value.
1400 len = strcspn(line, "\t =");
1402 value += strspn(value, "\t ");
1405 value += strspn(value, "\t ");
1408 variable = strchr(line, '.');
1417 fprintf(stderr, "No variable given.\n");
1421 if(action >= 0 && !*value) {
1422 fprintf(stderr, "No value for variable given.\n");
1426 if(action < -1 && *value)
1429 /* Some simple checks. */
1431 bool warnonremove = false;
1433 for(int i = 0; variables[i].name; i++) {
1434 if(strcasecmp(variables[i].name, variable))
1438 variable = (char *)variables[i].name;
1440 /* Discourage use of obsolete variables. */
1442 if(variables[i].type & VAR_OBSOLETE && action >= 0) {
1444 fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
1446 fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
1451 /* Don't put server variables in host config files */
1453 if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
1455 fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
1457 fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
1462 /* Should this go into our own host config file? */
1464 if(!node && !(variables[i].type & VAR_SERVER)) {
1465 node = get_my_name(true);
1470 /* Change "add" into "set" for variables that do not allow multiple occurences.
1471 Turn on warnings when it seems variables might be removed unintentionally. */
1473 if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
1474 warnonremove = true;
1476 } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
1477 warnonremove = true;
1483 if(node && !check_id(node)) {
1484 fprintf(stderr, "Invalid name for node.\n");
1489 if(force || action < 0) {
1490 fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
1492 fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
1497 // Open the right configuration file.
1500 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, node);
1502 filename = tinc_conf;
1504 FILE *f = fopen(filename, "r");
1506 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1510 char *tmpfile = NULL;
1514 xasprintf(&tmpfile, "%s.config.tmp", filename);
1515 tf = fopen(tmpfile, "w");
1517 fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
1523 // Copy the file, making modifications on the fly, unless we are just getting a value.
1527 bool removed = false;
1530 while(fgets(buf1, sizeof buf1, f)) {
1531 buf1[sizeof buf1 - 1] = 0;
1532 strncpy(buf2, buf1, sizeof buf2);
1534 // Parse line in a simple way
1538 len = strcspn(buf2, "\t =");
1539 bvalue = buf2 + len;
1540 bvalue += strspn(bvalue, "\t ");
1541 if(*bvalue == '=') {
1543 bvalue += strspn(bvalue, "\t ");
1549 if(!strcasecmp(buf2, variable)) {
1553 printf("%s\n", bvalue);
1555 } else if(action == -1) {
1556 if(!*value || !strcasecmp(bvalue, value)) {
1561 } else if(action == 0) {
1562 // Warn if "set" was used for variables that can occur multiple times
1563 if(warnonremove && strcasecmp(bvalue, value))
1564 fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
1566 // Already set? Delete the rest...
1570 // Otherwise, replace.
1571 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1572 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1581 // Copy original line...
1582 if(fputs(buf1, tf) < 0) {
1583 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1587 // Add newline if it is missing...
1588 if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
1589 if(fputc('\n', tf) < 0) {
1590 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1597 // Make sure we read everything...
1598 if(ferror(f) || !feof(f)) {
1599 fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
1604 fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
1608 // Add new variable if necessary.
1609 if(action > 0 || (action == 0 && !set)) {
1610 if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
1611 fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
1618 fprintf(stderr, "No matching configuration variables found.\n");
1622 // Make sure we wrote everything...
1624 fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
1628 // Could we find what we had to remove?
1629 if(action < 0 && !removed) {
1631 fprintf(stderr, "No configuration variables deleted.\n");
1635 // Replace the configuration file with the new one
1637 if(remove(filename)) {
1638 fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
1642 if(rename(tmpfile, filename)) {
1643 fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
1647 // Silently try notifying a running tincd of changes.
1648 if(connect_tincd(false))
1649 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1654 bool check_id(const char *name) {
1658 for(int i = 0; i < strlen(name); i++) {
1659 if(!isalnum(name[i]) && name[i] != '_')
1666 static bool try_bind(int port) {
1667 struct addrinfo *ai = NULL;
1668 struct addrinfo hint = {
1669 .ai_flags = AI_PASSIVE,
1670 .ai_family = AF_UNSPEC,
1671 .ai_socktype = SOCK_STREAM,
1672 .ai_protocol = IPPROTO_TCP,
1676 snprintf(portstr, sizeof portstr, "%d", port);
1678 if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
1682 int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
1685 int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
1695 int check_port(char *name) {
1699 fprintf(stderr, "Warning: could not bind to port 655. ");
1701 for(int i = 0; i < 100; i++) {
1702 int port = 0x1000 + (rand() & 0x7fff);
1703 if(try_bind(port)) {
1705 xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
1706 FILE *f = fopen(filename, "a");
1709 fprintf(stderr, "Please change tinc's Port manually.\n");
1713 fprintf(f, "Port = %d\n", port);
1715 fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
1720 fprintf(stderr, "Please change tinc's Port manually.\n");
1724 static int cmd_init(int argc, char *argv[]) {
1725 if(!access(tinc_conf, F_OK)) {
1726 fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
1731 fprintf(stderr, "Too many arguments!\n");
1733 } else if(argc < 2) {
1736 fprintf(stderr, "Enter the Name you want your tinc node to have: ");
1737 if(!fgets(buf, sizeof buf, stdin)) {
1738 fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
1741 int len = rstrip(buf);
1743 fprintf(stderr, "No name given!\n");
1748 fprintf(stderr, "No Name given!\n");
1752 name = strdup(argv[1]);
1754 fprintf(stderr, "No Name given!\n");
1759 if(!check_id(name)) {
1760 fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
1764 if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
1765 fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
1769 if(mkdir(confbase, 0777) && errno != EEXIST) {
1770 fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
1774 if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
1775 fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
1779 FILE *f = fopen(tinc_conf, "w");
1781 fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
1785 fprintf(f, "Name = %s\n", name);
1788 if(!rsa_keygen(2048, false) || !ed25519_keygen(false))
1795 xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
1796 if(access(filename, F_OK)) {
1797 FILE *f = fopenmask(filename, "w", 0777);
1799 fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
1802 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");
1811 static int cmd_generate_keys(int argc, char *argv[]) {
1813 fprintf(stderr, "Too many arguments!\n");
1818 name = get_my_name(false);
1820 return !(rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true) && ed25519_keygen(true));
1823 static int cmd_generate_rsa_keys(int argc, char *argv[]) {
1825 fprintf(stderr, "Too many arguments!\n");
1830 name = get_my_name(false);
1832 return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
1835 static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
1837 fprintf(stderr, "Too many arguments!\n");
1842 name = get_my_name(false);
1844 return !ed25519_keygen(true);
1847 static int cmd_help(int argc, char *argv[]) {
1852 static int cmd_version(int argc, char *argv[]) {
1854 fprintf(stderr, "Too many arguments!\n");
1862 static int cmd_info(int argc, char *argv[]) {
1864 fprintf(stderr, "Invalid number of arguments.\n");
1868 if(!connect_tincd(true))
1871 return info(fd, argv[1]);
1874 static const char *conffiles[] = {
1885 static int cmd_edit(int argc, char *argv[]) {
1887 fprintf(stderr, "Invalid number of arguments.\n");
1891 char *filename = NULL;
1893 if(strncmp(argv[1], "hosts" SLASH, 6)) {
1894 for(int i = 0; conffiles[i]; i++) {
1895 if(!strcmp(argv[1], conffiles[i])) {
1896 xasprintf(&filename, "%s" SLASH "%s", confbase, argv[1]);
1905 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, argv[1]);
1906 char *dash = strchr(argv[1], '-');
1909 if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
1910 fprintf(stderr, "Invalid configuration filename.\n");
1918 xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ?: getenv("EDITOR") ?: "vi", filename);
1920 xasprintf(&command, "edit \"%s\"", filename);
1922 int result = system(command);
1926 // Silently try notifying a running tincd of changes.
1927 if(connect_tincd(false))
1928 sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
1933 static int export(const char *name, FILE *out) {
1935 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
1936 FILE *in = fopen(filename, "r");
1938 fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
1942 fprintf(out, "Name = %s\n", name);
1944 while(fgets(buf, sizeof buf, in)) {
1945 if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4))
1950 fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
1959 static int cmd_export(int argc, char *argv[]) {
1961 fprintf(stderr, "Too many arguments!\n");
1965 char *name = get_my_name(true);
1969 int result = export(name, stdout);
1977 static int cmd_export_all(int argc, char *argv[]) {
1979 fprintf(stderr, "Too many arguments!\n");
1983 DIR *dir = opendir(hosts_dir);
1985 fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
1993 while((ent = readdir(dir))) {
1994 if(!check_id(ent->d_name))
2000 printf("#---------------------------------------------------------------#\n");
2002 result |= export(ent->d_name, stdout);
2011 static int cmd_import(int argc, char *argv[]) {
2013 fprintf(stderr, "Too many arguments!\n");
2022 char *filename = NULL;
2024 bool firstline = true;
2026 while(fgets(buf, sizeof buf, in)) {
2027 if(sscanf(buf, "Name = %s", name) == 1) {
2030 if(!check_id(name)) {
2031 fprintf(stderr, "Invalid Name in input!\n");
2039 xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
2041 if(!force && !access(filename, F_OK)) {
2042 fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
2047 out = fopen(filename, "w");
2049 fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
2055 } else if(firstline) {
2056 fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
2061 if(!strcmp(buf, "#---------------------------------------------------------------#\n"))
2065 if(fputs(buf, out) < 0) {
2066 fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
2076 fprintf(stderr, "Imported %d host configuration files.\n", count);
2079 fprintf(stderr, "No host configuration files imported.\n");
2084 static int cmd_exchange(int argc, char *argv[]) {
2085 return cmd_export(argc, argv) ?: cmd_import(argc, argv);
2088 static int cmd_exchange_all(int argc, char *argv[]) {
2089 return cmd_export_all(argc, argv) ?: cmd_import(argc, argv);
2092 static int switch_network(char *name) {
2104 free(unixsocketname);
2105 unixsocketname = NULL;
2111 netname = strcmp(name, ".") ? xstrdup(name) : NULL;
2114 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2115 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2116 xasprintf(&prompt, "%s> ", identname);
2121 static int cmd_network(int argc, char *argv[]) {
2123 fprintf(stderr, "Too many arguments!\n");
2128 return switch_network(argv[1]);
2130 DIR *dir = opendir(confdir);
2132 fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
2137 while((ent = readdir(dir))) {
2138 if(*ent->d_name == '.')
2141 if(!strcmp(ent->d_name, "tinc.conf")) {
2147 xasprintf(&fname, "%s/%s/tinc.conf", confdir, ent->d_name);
2148 if(!access(fname, R_OK))
2149 printf("%s\n", ent->d_name);
2158 static const struct {
2159 const char *command;
2160 int (*function)(int argc, char *argv[]);
2163 {"start", cmd_start},
2165 {"restart", cmd_restart},
2166 {"reload", cmd_reload},
2168 {"purge", cmd_purge},
2169 {"debug", cmd_debug},
2170 {"retry", cmd_retry},
2171 {"connect", cmd_connect},
2172 {"disconnect", cmd_disconnect},
2177 {"config", cmd_config, true},
2178 {"add", cmd_config},
2179 {"del", cmd_config},
2180 {"get", cmd_config},
2181 {"set", cmd_config},
2183 {"generate-keys", cmd_generate_keys},
2184 {"generate-rsa-keys", cmd_generate_rsa_keys},
2185 {"generate-ed25519-keys", cmd_generate_ed25519_keys},
2187 {"version", cmd_version},
2190 {"export", cmd_export},
2191 {"export-all", cmd_export_all},
2192 {"import", cmd_import},
2193 {"exchange", cmd_exchange},
2194 {"exchange-all", cmd_exchange_all},
2195 {"invite", cmd_invite},
2197 {"network", cmd_network},
2201 #ifdef HAVE_READLINE
2202 static char *complete_command(const char *text, int state) {
2210 while(commands[i].command) {
2211 if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text)))
2212 return xstrdup(commands[i].command);
2219 static char *complete_dump(const char *text, int state) {
2220 const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
2229 if(!strncasecmp(matches[i], text, strlen(text)))
2230 return xstrdup(matches[i]);
2237 static char *complete_config(const char *text, int state) {
2245 while(variables[i].name) {
2246 char *dot = strchr(text, '.');
2248 if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
2250 xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
2254 if(!strncasecmp(variables[i].name, text, strlen(text)))
2255 return xstrdup(variables[i].name);
2263 static char *complete_info(const char *text, int state) {
2267 if(!connect_tincd(false))
2269 // Check the list of nodes
2270 sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
2271 sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
2274 while(recvline(fd, line, sizeof line)) {
2276 int n = sscanf(line, "%d %d %s", &code, &req, item);
2286 fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
2290 if(!strncmp(item, text, strlen(text)))
2291 return xstrdup(strip_weight(item));
2297 static char *complete_nothing(const char *text, int state) {
2301 static char **completion (const char *text, int start, int end) {
2302 char **matches = NULL;
2305 matches = rl_completion_matches(text, complete_command);
2306 else if(!strncasecmp(rl_line_buffer, "dump ", 5))
2307 matches = rl_completion_matches(text, complete_dump);
2308 else if(!strncasecmp(rl_line_buffer, "add ", 4))
2309 matches = rl_completion_matches(text, complete_config);
2310 else if(!strncasecmp(rl_line_buffer, "del ", 4))
2311 matches = rl_completion_matches(text, complete_config);
2312 else if(!strncasecmp(rl_line_buffer, "get ", 4))
2313 matches = rl_completion_matches(text, complete_config);
2314 else if(!strncasecmp(rl_line_buffer, "set ", 4))
2315 matches = rl_completion_matches(text, complete_config);
2316 else if(!strncasecmp(rl_line_buffer, "info ", 5))
2317 matches = rl_completion_matches(text, complete_info);
2323 static int cmd_shell(int argc, char *argv[]) {
2324 xasprintf(&prompt, "%s> ", identname);
2328 int maxargs = argc + 16;
2329 char **nargv = xmalloc(maxargs * sizeof *nargv);
2331 for(int i = 0; i < argc; i++)
2334 #ifdef HAVE_READLINE
2335 rl_readline_name = "tinc";
2336 rl_completion_entry_function = complete_nothing;
2337 rl_attempted_completion_function = completion;
2338 rl_filename_completion_desired = 0;
2343 #ifdef HAVE_READLINE
2347 rl_basic_word_break_characters = "\t\n ";
2348 line = readline(prompt);
2350 copy = xstrdup(line);
2352 line = fgets(buf, sizeof buf, stdin);
2356 fputs(prompt, stdout);
2358 line = fgets(buf, sizeof buf, stdin);
2364 /* Ignore comments */
2372 char *p = line + strspn(line, " \t\n");
2373 char *next = strtok(p, " \t\n");
2376 if(nargc >= maxargs) {
2377 fprintf(stderr, "next %p '%s', p %p '%s'\n", next, next, p, p);
2380 nargv = xrealloc(nargv, maxargs * sizeof *nargv);
2385 next = strtok(NULL, " \t\n");
2391 if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit"))
2396 for(int i = 0; commands[i].command; i++) {
2397 if(!strcasecmp(nargv[argc], commands[i].command)) {
2398 result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
2404 #ifdef HAVE_READLINE
2410 fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
2423 int main(int argc, char *argv[]) {
2424 program_name = argv[0];
2428 if(!parse_options(argc, argv))
2432 xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
2433 xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
2446 static struct WSAData wsa_state;
2448 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
2449 fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
2457 tty = isatty(0) && isatty(1);
2460 return cmd_shell(argc, argv);
2462 for(int i = 0; commands[i].command; i++) {
2463 if(!strcasecmp(argv[optind], commands[i].command))
2464 return commands[i].function(argc - optind, argv + optind);
2467 fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);