/*
tincctl.c -- Controlling a running tincd
- Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 2007-2014 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
-#include <sys/un.h>
#include <getopt.h>
+#ifdef HAVE_READLINE
+#include "readline/readline.h"
+#include "readline/history.h"
+#endif
+
#include "xalloc.h"
#include "protocol.h"
#include "control_common.h"
+#include "crypto.h"
+#include "ecdsagen.h"
+#include "fsck.h"
+#include "info.h"
+#include "invitation.h"
+#include "names.h"
#include "rsagen.h"
+#include "utils.h"
+#include "tincctl.h"
+#include "top.h"
+#include "version.h"
+
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
-/* The name this program was run with. */
-char *program_name = NULL;
+static char **orig_argv;
+static int orig_argc;
/* If nonzero, display usage information and exit. */
-bool show_help = false;
+static bool show_help = false;
/* If nonzero, print the version on standard output and exit. */
-bool show_version = false;
-
-/* If nonzero, it will attempt to kill a running tincd and exit. */
-int kill_tincd = 0;
-
-/* If nonzero, generate public/private keypair for this host/net. */
-int generate_keys = 0;
-
-static char *identname = NULL; /* program name for syslog */
-static char *controlsocketname = NULL; /* pid file location */
-char *netname = NULL;
-char *confbase = NULL;
+static bool show_version = false;
+
+static char *name = NULL;
+static char controlcookie[1025];
+char *tinc_conf = NULL;
+char *hosts_dir = NULL;
+struct timeval now;
+
+// Horrible global variables...
+static int pid = 0;
+int fd = -1;
+char line[4096];
+static int code;
+static int req;
+static int result;
+bool force = false;
+bool tty = true;
+bool confbasegiven = false;
+bool netnamegiven = false;
+char *scriptinterpreter = NULL;
+char *scriptextension = "";
+static char *prompt;
static struct option const long_options[] = {
+ {"batch", no_argument, NULL, 'b'},
{"config", required_argument, NULL, 'c'},
{"net", required_argument, NULL, 'n'},
{"help", no_argument, NULL, 1},
{"version", no_argument, NULL, 2},
- {"controlsocket", required_argument, NULL, 5},
+ {"pidfile", required_argument, NULL, 3},
+ {"force", no_argument, NULL, 4},
{NULL, 0, NULL, 0}
};
+static void version(void) {
+ printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
+ BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
+ printf("Copyright (C) 1998-2014 Ivo Timmermans, Guus Sliepen and others.\n"
+ "See the AUTHORS file for a complete list.\n\n"
+ "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
+ "and you are welcome to redistribute it under certain conditions;\n"
+ "see the file COPYING for details.\n");
+}
+
static void usage(bool status) {
- if(status)
- fprintf(stderr, _("Try `%s --help\' for more information.\n"),
- program_name);
- else {
- printf(_("Usage: %s [options] command\n\n"), program_name);
- printf(_("Valid options are:\n"
- " -c, --config=DIR Read configuration options from DIR.\n"
- " -n, --net=NETNAME Connect to net NETNAME.\n"
- " --controlsocket=FILENAME Open control socket at FILENAME.\n"
- " --help Display this help and exit.\n"
- " --version Output version information and exit.\n"
+ if(status) {
+ fprintf(stderr, "Try `%s --help\' for more information.\n", program_name);
+ } else {
+ printf("Usage: %s [options] command\n\n", program_name);
+ printf("Valid options are:\n"
+ " -b, --batch Don't ask for anything (non-interactive mode).\n"
+ " -c, --config=DIR Read configuration options from DIR.\n"
+ " -n, --net=NETNAME Connect to net NETNAME.\n"
+ " --pidfile=FILENAME Read control cookie from FILENAME.\n"
+ " --force Force some commands to work despite warnings.\n"
+ " --help Display this help and exit.\n"
+ " --version Output version information and exit.\n"
"\n"
"Valid commands are:\n"
- " start Start tincd.\n"
+ " init [name] Create initial configuration files.\n"
+ " get VARIABLE Print current value of VARIABLE\n"
+ " set VARIABLE VALUE Set VARIABLE to VALUE\n"
+ " add VARIABLE VALUE Add VARIABLE with the given VALUE\n"
+ " del VARIABLE [VALUE] Remove VARIABLE [only ones with watching VALUE]\n"
+ " start [tincd options] Start tincd.\n"
" stop Stop tincd.\n"
- " restart Restart tincd.\n"
- " reload Reload configuration of running tincd.\n"
+ " restart [tincd options] Restart tincd.\n"
+ " reload Partially reload configuration of running tincd.\n"
" pid Show PID of currently running tincd.\n"
- " generate-keys [bits] Generate a new public/private keypair.\n"
+#ifdef DISABLE_LEGACY
+ " generate-keys Generate a new Ed25519 public/private keypair.\n"
+#else
+ " generate-keys [bits] Generate new RSA and Ed25519 public/private keypairs.\n"
+ " generate-rsa-keys [bits] Generate a new RSA public/private keypair.\n"
+#endif
+ " generate-ed25519-keys Generate a new Ed25519 public/private keypair.\n"
" dump Dump a list of one of the following things:\n"
- " nodes - all known nodes in the VPN\n"
+ " [reachable] nodes - all known nodes in the VPN\n"
" edges - all known connections in the VPN\n"
" subnets - all known subnets in the VPN\n"
" connections - all meta connections with ourself\n"
- " graph - graph of the VPN in dotty format\n"
+ " [di]graph - graph of the VPN in dotty format\n"
+ " info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
" purge Purge unreachable nodes\n"
" debug N Set debug level\n"
" retry Retry all outgoing connections\n"
- " reload Partial reload of configuration\n"
- "\n"));
- printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
+ " disconnect NODE Close meta connection with NODE\n"
+#ifdef HAVE_CURSES
+ " top Show real-time statistics\n"
+#endif
+ " pcap [snaplen] Dump traffic in pcap format [up to snaplen bytes per packet]\n"
+ " log [level] Dump log output [up to the specified level]\n"
+ " export Export host configuration of local node to standard output\n"
+ " export-all Export all host configuration files to standard output\n"
+ " import Import host configuration file(s) from standard input\n"
+ " exchange Same as export followed by import\n"
+ " exchange-all Same as export-all followed by import\n"
+ " invite NODE [...] Generate an invitation for NODE\n"
+ " join INVITATION Join a VPN using an INVITATION\n"
+ " network [NETNAME] List all known networks, or switch to the one named NETNAME.\n"
+ " fsck Check the configuration files for problems.\n"
+ "\n");
+ printf("Report bugs to tinc@tinc-vpn.org.\n");
}
}
int r;
int option_index = 0;
- while((r = getopt_long(argc, argv, "c:n:", long_options, &option_index)) != EOF) {
+ while((r = getopt_long(argc, argv, "+c:n:", long_options, &option_index)) != EOF) {
switch (r) {
- case 0: /* long option */
+ case 0: /* long option */
+ break;
+
+ case 'b':
+ tty = false;
break;
- case 'c': /* config file */
+ case 'c': /* config file */
confbase = xstrdup(optarg);
+ confbasegiven = true;
break;
- case 'n': /* net name given */
+ case 'n': /* net name given */
netname = xstrdup(optarg);
break;
- case 1: /* show help */
+ case 1: /* show help */
show_help = true;
break;
- case 2: /* show version */
+ case 2: /* show version */
show_version = true;
break;
- case 5: /* open control socket here */
- controlsocketname = xstrdup(optarg);
+ case 3: /* open control socket here */
+ pidfilename = xstrdup(optarg);
break;
- case '?':
+ case 4: /* force */
+ force = true;
+ break;
+
+ case '?': /* wrong options */
usage(true);
return false;
}
}
+ if(!netname && (netname = getenv("NETNAME")))
+ netname = xstrdup(netname);
+
+ /* netname "." is special: a "top-level name" */
+
+ if(netname && (!*netname || !strcmp(netname, "."))) {
+ free(netname);
+ netname = NULL;
+ }
+
+ if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
+ fprintf(stderr, "Invalid character in netname!\n");
+ return false;
+ }
+
return true;
}
-FILE *ask_and_open(const char *filename, const char *what, const char *mode) {
+/* Open a file with the desired permissions, minus the umask.
+ Also, if we want to create an executable file, we call fchmod()
+ to set the executable bits. */
+
+FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
+ mode_t mask = umask(0);
+ perms &= ~mask;
+ umask(~perms);
+ FILE *f = fopen(filename, mode);
+#ifdef HAVE_FCHMOD
+ if((perms & 0444) && f)
+ fchmod(fileno(f), perms);
+#endif
+ umask(mask);
+ return f;
+}
+
+static void disable_old_keys(const char *filename, const char *what) {
+ char tmpfile[PATH_MAX] = "";
+ char buf[1024];
+ bool disabled = false;
+ bool block = false;
+ bool error = false;
+ FILE *r, *w;
+
+ r = fopen(filename, "r");
+ if(!r)
+ return;
+
+ snprintf(tmpfile, sizeof tmpfile, "%s.tmp", filename);
+
+ struct stat st = {.st_mode = 0600};
+ fstat(fileno(r), &st);
+ w = fopenmask(tmpfile, "w", st.st_mode);
+
+ while(fgets(buf, sizeof buf, r)) {
+ if(!block && !strncmp(buf, "-----BEGIN ", 11)) {
+ if((strstr(buf, " ED25519 ") && strstr(what, "Ed25519")) || (strstr(buf, " RSA ") && strstr(what, "RSA"))) {
+ disabled = true;
+ block = true;
+ }
+ }
+
+ bool ed25519pubkey = !strncasecmp(buf, "Ed25519PublicKey", 16) && strchr(" \t=", buf[16]) && strstr(what, "Ed25519");
+
+ if(ed25519pubkey)
+ disabled = true;
+
+ if(w) {
+ if(block || ed25519pubkey)
+ fputc('#', w);
+ if(fputs(buf, w) < 0) {
+ error = true;
+ break;
+ }
+ }
+
+ if(block && !strncmp(buf, "-----END ", 9))
+ block = false;
+ }
+
+ if(w)
+ if(fclose(w) < 0)
+ error = true;
+ if(ferror(r) || fclose(r) < 0)
+ error = true;
+
+ if(disabled) {
+ if(!w || error) {
+ fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
+ if(w)
+ unlink(tmpfile);
+ return;
+ }
+
+#ifdef HAVE_MINGW
+ // We cannot atomically replace files on Windows.
+ char bakfile[PATH_MAX] = "";
+ snprintf(bakfile, sizeof bakfile, "%s.bak", filename);
+ if(rename(filename, bakfile) || rename(tmpfile, filename)) {
+ rename(bakfile, filename);
+#else
+ if(rename(tmpfile, filename)) {
+#endif
+ fprintf(stderr, "Warning: old key(s) found, remove them by hand!\n");
+ } else {
+#ifdef HAVE_MINGW
+ unlink(bakfile);
+#endif
+ fprintf(stderr, "Warning: old key(s) found and disabled.\n");
+ }
+ }
+
+ unlink(tmpfile);
+}
+
+static FILE *ask_and_open(const char *filename, const char *what, const char *mode, bool ask, mode_t perms) {
FILE *r;
char *directory;
char buf[PATH_MAX];
char buf2[PATH_MAX];
- size_t len;
/* Check stdin and stdout */
- if(isatty(0) && isatty(1)) {
+ if(ask && tty) {
/* Ask for a file and/or directory name. */
- fprintf(stdout, _("Please enter a file to save %s to [%s]: "),
- what, filename);
- fflush(stdout);
+ fprintf(stderr, "Please enter a file to save %s to [%s]: ", what, filename);
- if(fgets(buf, sizeof buf, stdin) < 0) {
- fprintf(stderr, _("Error while reading stdin: %s\n"),
- strerror(errno));
+ if(fgets(buf, sizeof buf, stdin) == NULL) {
+ fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
return NULL;
}
- len = strlen(buf);
+ size_t len = strlen(buf);
if(len)
buf[--len] = 0;
#endif
/* The directory is a relative path or a filename. */
directory = get_current_dir_name();
- snprintf(buf2, sizeof buf2, "%s/%s", directory, filename);
+ snprintf(buf2, sizeof buf2, "%s" SLASH "%s", directory, filename);
filename = buf2;
}
- umask(0077); /* Disallow everything for group and other */
+ disable_old_keys(filename, what);
/* Open it first to keep the inode busy */
- r = fopen(filename, mode);
+ r = fopenmask(filename, mode, perms);
if(!r) {
- fprintf(stderr, _("Error opening file `%s': %s\n"), filename, strerror(errno));
+ fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
return NULL;
}
}
/*
- Generate a public/private RSA keypair, and ask for a file to store
+ Generate a public/private Ed25519 keypair, and ask for a file to store
them in.
*/
-static bool keygen(int bits) {
- rsa_t key;
+static bool ed25519_keygen(bool ask) {
+ ecdsa_t *key;
FILE *f;
- char *name = NULL;
- char *filename;
+ char *pubname, *privname;
- fprintf(stderr, _("Generating %d bits keys:\n"), bits);
+ fprintf(stderr, "Generating Ed25519 keypair:\n");
- if(!rsa_generate(&key, bits, 0x10001)) {
- fprintf(stderr, _("Error during key generation!\n"));
+ if(!(key = ecdsa_generate())) {
+ fprintf(stderr, "Error during key generation!\n");
return false;
} else
- fprintf(stderr, _("Done.\n"));
+ fprintf(stderr, "Done.\n");
- asprintf(&filename, "%s/rsa_key.priv", confbase);
- f = ask_and_open(filename, _("private RSA key"), "a");
+ xasprintf(&privname, "%s" SLASH "ed25519_key.priv", confbase);
+ f = ask_and_open(privname, "private Ed25519 key", "a", ask, 0600);
+ free(privname);
if(!f)
return false;
-
-#ifdef HAVE_FCHMOD
- /* Make it unreadable for others. */
- fchmod(fileno(f), 0600);
-#endif
-
- if(ftell(f))
- fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
- rsa_write_pem_private_key(&key, f);
+ if(!ecdsa_write_pem_private_key(key, f)) {
+ fprintf(stderr, "Error writing private key!\n");
+ ecdsa_free(key);
+ fclose(f);
+ return false;
+ }
fclose(f);
- free(filename);
if(name)
- asprintf(&filename, "%s/hosts/%s", confbase, name);
+ xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
else
- asprintf(&filename, "%s/rsa_key.pub", confbase);
+ xasprintf(&pubname, "%s" SLASH "ed25519_key.pub", confbase);
- f = ask_and_open(filename, _("public RSA key"), "a");
+ f = ask_and_open(pubname, "public Ed25519 key", "a", ask, 0666);
+ free(pubname);
if(!f)
return false;
- if(ftell(f))
- fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
-
- rsa_write_pem_public_key(&key, f);
+ char *pubkey = ecdsa_get_base64_public_key(key);
+ fprintf(f, "Ed25519PublicKey = %s\n", pubkey);
+ free(pubkey);
fclose(f);
- free(filename);
+ ecdsa_free(key);
return true;
}
+#ifndef DISABLE_LEGACY
/*
- Set all files and paths according to netname
+ Generate a public/private RSA keypair, and ask for a file to store
+ them in.
*/
-static void make_names(void) {
-#ifdef HAVE_MINGW
- HKEY key;
- char installdir[1024] = "";
- long len = sizeof installdir;
-#endif
+static bool rsa_keygen(int bits, bool ask) {
+ rsa_t *key;
+ FILE *f;
+ char *pubname, *privname;
- if(netname)
- asprintf(&identname, "tinc.%s", netname);
- else
- identname = xstrdup("tinc");
+ // Make sure the key size is a multiple of 8 bits.
+ bits &= ~0x7;
-#ifdef HAVE_MINGW
- if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
- if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
- if(!logfilename)
- asprintf(&logfilename, "%s/log/%s.log", identname);
- if(!confbase) {
- if(netname)
- asprintf(&confbase, "%s/%s", installdir, netname);
- else
- asprintf(&confbase, "%s", installdir);
- }
- }
- RegCloseKey(key);
- if(*installdir)
- return;
+ // Force them to be between 1024 and 8192 bits long.
+ if(bits < 1024)
+ bits = 1024;
+ if(bits > 8192)
+ bits = 8192;
+
+ fprintf(stderr, "Generating %d bits keys:\n", bits);
+
+ if(!(key = rsa_generate(bits, 0x10001))) {
+ fprintf(stderr, "Error during key generation!\n");
+ return false;
+ } else
+ fprintf(stderr, "Done.\n");
+
+ xasprintf(&privname, "%s" SLASH "rsa_key.priv", confbase);
+ f = ask_and_open(privname, "private RSA key", "a", ask, 0600);
+ free(privname);
+
+ if(!f)
+ return false;
+
+ if(!rsa_write_pem_private_key(key, f)) {
+ fprintf(stderr, "Error writing private key!\n");
+ fclose(f);
+ rsa_free(key);
+ return false;
}
-#endif
- if(!controlsocketname)
- asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
+ fclose(f);
- if(netname) {
- if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc/%s", netname);
- else
- fprintf(stderr, _("Both netname and configuration directory given, using the latter...\n"));
- } else {
- if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc");
+ if(name)
+ xasprintf(&pubname, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+ else
+ xasprintf(&pubname, "%s" SLASH "rsa_key.pub", confbase);
+
+ f = ask_and_open(pubname, "public RSA key", "a", ask, 0666);
+ free(pubname);
+
+ if(!f)
+ return false;
+
+ if(!rsa_write_pem_public_key(key, f)) {
+ fprintf(stderr, "Error writing public key!\n");
+ fclose(f);
+ rsa_free(key);
+ return false;
}
+
+ fclose(f);
+ rsa_free(key);
+
+ return true;
}
+#endif
+
+char buffer[4096];
+size_t blen = 0;
+
+bool recvline(int fd, char *line, size_t len) {
+ char *newline = NULL;
-static int fullread(int fd, void *data, size_t datalen) {
- int rv, len = 0;
+ if(!fd)
+ abort();
- while(len < datalen) {
- rv = read(fd, data + len, datalen - len);
- if(rv == -1 && errno == EINTR)
+ while(!(newline = memchr(buffer, '\n', blen))) {
+ int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
+ if(result == -1 && sockerrno == EINTR)
continue;
- else if(rv == -1)
- return rv;
- else if(rv == 0) {
- errno = ENODATA;
- return -1;
- }
- len += rv;
+ else if(result <= 0)
+ return false;
+ blen += result;
}
- return 0;
-}
-/*
- Send a request (raw)
-*/
-static int send_ctl_request(int fd, enum request_type type,
- void const *outdata, size_t outdatalen,
- int *res_errno_p, void **indata_p,
- size_t *indatalen_p) {
- tinc_ctl_request_t req;
- int rv;
- struct iovec vector[2] = {
- {&req, sizeof req},
- {(void*) outdata, outdatalen}
- };
- void *indata;
+ if(newline - buffer >= len)
+ return false;
- if(res_errno_p == NULL)
- return -1;
+ len = newline - buffer;
- memset(&req, 0, sizeof req);
- req.length = sizeof req + outdatalen;
- req.type = type;
- req.res_errno = 0;
+ memcpy(line, buffer, len);
+ line[len] = 0;
+ memmove(buffer, newline + 1, blen - len - 1);
+ blen -= len + 1;
- while((rv = writev(fd, vector, 2)) == -1 && errno == EINTR) ;
- if(rv != req.length)
- return -1;
+ return true;
+}
- if(fullread(fd, &req, sizeof req) == -1)
- return -1;
+bool recvdata(int fd, char *data, size_t len) {
+ if(len == -1)
+ len = blen;
- if(req.length < sizeof req) {
- errno = EINVAL;
- return -1;
+ while(blen < len) {
+ int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
+ if(result == -1 && sockerrno == EINTR)
+ continue;
+ else if(result <= 0)
+ return false;
+ blen += result;
}
- if(req.length > sizeof req) {
- if(indata_p == NULL) {
- errno = EINVAL;
- return -1;
- }
+ memcpy(data, buffer, len);
+ memmove(buffer, buffer + len, blen - len);
+ blen -= len;
+
+ return true;
+}
- indata = xmalloc(req.length - sizeof req);
+bool sendline(int fd, char *format, ...) {
+ static char buffer[4096];
+ char *p = buffer;
+ int blen = 0;
+ va_list ap;
- if(fullread(fd, indata, req.length - sizeof req) == -1) {
- free(indata);
- return -1;
- }
+ va_start(ap, format);
+ blen = vsnprintf(buffer, sizeof buffer, format, ap);
+ va_end(ap);
- *indata_p = indata;
- if(indatalen_p != NULL)
- *indatalen_p = req.length - sizeof req;
- }
+ if(blen < 1 || blen >= sizeof buffer)
+ return false;
- *res_errno_p = req.res_errno;
+ buffer[blen] = '\n';
+ blen++;
- return 0;
+ while(blen) {
+ int result = send(fd, p, blen, MSG_NOSIGNAL);
+ if(result == -1 && sockerrno == EINTR)
+ continue;
+ else if(result <= 0)
+ return false;
+ p += result;
+ blen -= result;
+ }
+
+ return true;
}
-/*
- Send a request (with printfs)
-*/
-static int send_ctl_request_cooked(int fd, enum request_type type,
- void const *outdata, size_t outdatalen)
-{
- int res_errno = -1;
- char *buf = NULL;
- size_t buflen = 0;
+static void pcap(int fd, FILE *out, int snaplen) {
+ sendline(fd, "%d %d %d", CONTROL, REQ_PCAP, snaplen);
+ char data[9018];
+
+ struct {
+ uint32_t magic;
+ uint16_t major;
+ uint16_t minor;
+ uint32_t tz_offset;
+ uint32_t tz_accuracy;
+ uint32_t snaplen;
+ uint32_t ll_type;
+ } header = {
+ 0xa1b2c3d4,
+ 2, 4,
+ 0, 0,
+ snaplen ?: sizeof data,
+ 1,
+ };
- if(send_ctl_request(fd, type, outdata, outdatalen, &res_errno,
- (void**) &buf, &buflen)) {
- fprintf(stderr, _("Error sending request: %s\n"), strerror(errno));
- return -1;
+ struct {
+ uint32_t tv_sec;
+ uint32_t tv_usec;
+ uint32_t len;
+ uint32_t origlen;
+ } packet;
+
+ struct timeval tv;
+
+ fwrite(&header, sizeof header, 1, out);
+ fflush(out);
+
+ char line[32];
+ while(recvline(fd, line, sizeof line)) {
+ int code, req, len;
+ int n = sscanf(line, "%d %d %d", &code, &req, &len);
+ gettimeofday(&tv, NULL);
+ if(n != 3 || code != CONTROL || req != REQ_PCAP || len < 0 || len > sizeof data)
+ break;
+ if(!recvdata(fd, data, len))
+ break;
+ packet.tv_sec = tv.tv_sec;
+ packet.tv_usec = tv.tv_usec;
+ packet.len = len;
+ packet.origlen = len;
+ fwrite(&packet, sizeof packet, 1, out);
+ fwrite(data, len, 1, out);
+ fflush(out);
}
+}
- if(buf != NULL) {
- printf("%*s", (int)buflen, buf);
- free(buf);
+static void logcontrol(int fd, FILE *out, int level) {
+ sendline(fd, "%d %d %d", CONTROL, REQ_LOG, level);
+ char data[1024];
+ char line[32];
+
+ while(recvline(fd, line, sizeof line)) {
+ int code, req, len;
+ int n = sscanf(line, "%d %d %d", &code, &req, &len);
+ if(n != 3 || code != CONTROL || req != REQ_LOG || len < 0 || len > sizeof data)
+ break;
+ if(!recvdata(fd, data, len))
+ break;
+ fwrite(data, len, 1, out);
+ fputc('\n', out);
+ fflush(out);
}
+}
- if(res_errno != 0) {
- fprintf(stderr, _("Server reported error: %s\n"), strerror(res_errno));
- return -1;
+#ifdef HAVE_MINGW
+static bool remove_service(void) {
+ SC_HANDLE manager = NULL;
+ SC_HANDLE service = NULL;
+ SERVICE_STATUS status = {0};
+
+ manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
+ if(!manager) {
+ fprintf(stderr, "Could not open service manager: %s\n", winerror(GetLastError()));
+ return false;
}
- return 0;
-}
+ service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
-int main(int argc, char *argv[], char *envp[]) {
- struct sockaddr_un addr;
- tinc_ctl_greeting_t greeting;
- int fd;
- int result;
+ if(!service) {
+ fprintf(stderr, "Could not open %s service: %s\n", identname, winerror(GetLastError()));
+ return false;
+ }
- program_name = argv[0];
+ if(!ControlService(service, SERVICE_CONTROL_STOP, &status))
+ fprintf(stderr, "Could not stop %s service: %s\n", identname, winerror(GetLastError()));
+ else
+ fprintf(stderr, "%s service stopped\n", identname);
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
+ if(!DeleteService(service)) {
+ fprintf(stderr, "Could not remove %s service: %s\n", identname, winerror(GetLastError()));
+ return false;
+ }
- if(!parse_options(argc, argv))
- return 1;
-
- make_names();
+ fprintf(stderr, "%s service removed\n", identname);
- if(show_version) {
- printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
- VERSION, __DATE__, __TIME__, PROT_CURRENT);
- printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
- "See the AUTHORS file for a complete list.\n\n"
- "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
- "and you are welcome to redistribute it under certain conditions;\n"
- "see the file COPYING for details.\n"));
+ return true;
+}
+#endif
- return 0;
+bool connect_tincd(bool verbose) {
+ if(fd >= 0) {
+ fd_set r;
+ FD_ZERO(&r);
+ FD_SET(fd, &r);
+ struct timeval tv = {0, 0};
+ if(select(fd + 1, &r, NULL, NULL, &tv)) {
+ fprintf(stderr, "Previous connection to tincd lost, reconnecting.\n");
+ close(fd);
+ fd = -1;
+ } else {
+ return true;
+ }
}
- if(show_help) {
- usage(false);
- return 0;
+ FILE *f = fopen(pidfilename, "r");
+ if(!f) {
+ if(verbose)
+ fprintf(stderr, "Could not open pid file %s: %s\n", pidfilename, strerror(errno));
+ return false;
}
- if(optind >= argc) {
- fprintf(stderr, _("Not enough arguments.\n"));
- usage(true);
- return 1;
+ char host[129];
+ char port[129];
+
+ if(fscanf(f, "%20d %1024s %128s port %128s", &pid, controlcookie, host, port) != 4) {
+ if(verbose)
+ fprintf(stderr, "Could not parse pid file %s\n", pidfilename);
+ fclose(f);
+ return false;
}
- // First handle commands that don't involve connecting to a running tinc daemon.
+ fclose(f);
+
+#ifndef HAVE_MINGW
+ struct sockaddr_un sa;
+ sa.sun_family = AF_UNIX;
+ strncpy(sa.sun_path, unixsocketname, sizeof sa.sun_path);
- if(!strcasecmp(argv[optind], "generate-keys")) {
- return !keygen(optind > argc ? atoi(argv[optind + 1]) : 1024);
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if(fd < 0) {
+ if(verbose)
+ fprintf(stderr, "Cannot create UNIX socket: %s\n", sockstrerror(sockerrno));
+ return false;
}
- if(!strcasecmp(argv[optind], "start")) {
- argv[optind] = NULL;
- execve(SBINDIR "/tincd", argv, envp);
- fprintf(stderr, _("Could not start tincd: %s"), strerror(errno));
- return 1;
+ if(connect(fd, (struct sockaddr *)&sa, sizeof sa) < 0) {
+ if(verbose)
+ fprintf(stderr, "Cannot connect to UNIX socket %s: %s\n", unixsocketname, sockstrerror(sockerrno));
+ close(fd);
+ fd = -1;
+ return false;
}
+#else
+ struct addrinfo hints = {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ .ai_flags = 0,
+ };
- /*
- * Now handle commands that do involve connecting to a running tinc daemon.
- * Authenticate the server by ensuring the parent directory can be
- * traversed only by root. Note this is not totally race-free unless all
- * ancestors are writable only by trusted users, which we don't verify.
- */
-
- struct stat statbuf;
- char *lastslash = strrchr(controlsocketname, '/');
- if(lastslash != NULL) {
- /* control socket is not in cwd; stat its parent */
- *lastslash = 0;
- result = stat(controlsocketname, &statbuf);
- *lastslash = '/';
- } else
- result = stat(".", &statbuf);
+ struct addrinfo *res = NULL;
- if(result < 0) {
- fprintf(stderr, _("Unable to check control socket directory permissions: %s\n"), strerror(errno));
- return 1;
+ if(getaddrinfo(host, port, &hints, &res) || !res) {
+ if(verbose)
+ fprintf(stderr, "Cannot resolve %s port %s: %s", host, port, sockstrerror(sockerrno));
+ return false;
}
- if(statbuf.st_uid != 0 || (statbuf.st_mode & S_IXOTH) != 0 || (statbuf.st_gid != 0 && (statbuf.st_mode & S_IXGRP)) != 0) {
- fprintf(stderr, _("Insecure permissions on control socket directory\n"));
- return 1;
+ fd = socket(res->ai_family, SOCK_STREAM, IPPROTO_TCP);
+ if(fd < 0) {
+ if(verbose)
+ fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
+ return false;
}
- if(strlen(controlsocketname) >= sizeof addr.sun_path) {
- fprintf(stderr, _("Control socket filename too long!\n"));
- return 1;
+#ifdef HAVE_MINGW
+ unsigned long arg = 0;
+
+ if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
+ if(verbose)
+ fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
}
+#endif
- fd = socket(PF_UNIX, SOCK_STREAM, 0);
- if(fd < 0) {
- fprintf(stderr, _("Cannot create UNIX socket: %s\n"), strerror(errno));
- return 1;
+ if(connect(fd, res->ai_addr, res->ai_addrlen) < 0) {
+ if(verbose)
+ fprintf(stderr, "Cannot connect to %s port %s: %s\n", host, port, sockstrerror(sockerrno));
+ close(fd);
+ fd = -1;
+ return false;
}
- memset(&addr, 0, sizeof addr);
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, controlsocketname, sizeof addr.sun_path - 1);
+ freeaddrinfo(res);
+#endif
- if(connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0) {
- fprintf(stderr, _("Cannot connect to %s: %s\n"), controlsocketname, strerror(errno));
- return 1;
- }
+#ifdef SO_NOSIGPIPE
+ static const int one = 1;
+ setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&one, sizeof one);
+#endif
- if(fullread(fd, &greeting, sizeof greeting) == -1) {
- fprintf(stderr, _("Cannot read greeting from control socket: %s\n"),
- strerror(errno));
- return 1;
+ char data[4096];
+ int version;
+
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
+ if(verbose)
+ fprintf(stderr, "Cannot read greeting from control socket: %s\n", sockstrerror(sockerrno));
+ close(fd);
+ fd = -1;
+ return false;
}
- if(greeting.version != TINC_CTL_VERSION_CURRENT) {
- fprintf(stderr, _("Version mismatch: server %d, client %d\n"),
- greeting.version, TINC_CTL_VERSION_CURRENT);
- return 1;
+ sendline(fd, "%d ^%s %d", ID, controlcookie, TINC_CTL_VERSION_CURRENT);
+
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &version, &pid) != 3 || code != 4 || version != TINC_CTL_VERSION_CURRENT) {
+ if(verbose)
+ fprintf(stderr, "Could not fully establish control socket connection\n");
+ close(fd);
+ fd = -1;
+ return false;
}
- if(!strcasecmp(argv[optind], "pid")) {
- printf("%d\n", greeting.pid);
+ return true;
+}
+
+
+static int cmd_start(int argc, char *argv[]) {
+ if(connect_tincd(false)) {
+ if(netname)
+ fprintf(stderr, "A tincd is already running for net `%s' with pid %d.\n", netname, pid);
+ else
+ fprintf(stderr, "A tincd is already running with pid %d.\n", pid);
return 0;
}
- if(!strcasecmp(argv[optind], "stop")) {
- return send_ctl_request_cooked(fd, REQ_STOP, NULL, 0) != -1;
+ char *c;
+ char *slash = strrchr(program_name, '/');
+
+#ifdef HAVE_MINGW
+ if ((c = strrchr(program_name, '\\')) > slash)
+ slash = c;
+#endif
+
+ if (slash++)
+ xasprintf(&c, "%.*stincd", (int)(slash - program_name), program_name);
+ else
+ c = "tincd";
+
+ int nargc = 0;
+ char **nargv = xzalloc((optind + argc) * sizeof *nargv);
+
+ char *arg0 = c;
+#ifdef HAVE_MINGW
+ /*
+ Windows has no real concept of an "argv array". A command line is just one string.
+ The CRT of the new process will decode the command line string to generate argv before calling main(), and (by convention)
+ it uses quotes to handle spaces in arguments.
+ Therefore we need to quote all arguments that might contain spaces. No, execvp() won't do that for us (see MSDN).
+ If we don't do that, then execvp() will run fine but any spaces in the filename contained in arg0 will bleed
+ into the next arguments when the spawned process' CRT parses its command line, resulting in chaos.
+ */
+ xasprintf(&arg0, "\"%s\"", arg0);
+#endif
+ nargv[nargc++] = arg0;
+ for(int i = 1; i < optind; i++)
+ nargv[nargc++] = orig_argv[i];
+ for(int i = 1; i < argc; i++)
+ nargv[nargc++] = argv[i];
+
+#ifdef HAVE_MINGW
+ int status = spawnvp(_P_WAIT, c, nargv);
+ if (status == -1) {
+ fprintf(stderr, "Error starting %s: %s\n", c, strerror(errno));
+ return 1;
}
+ return status;
+#else
+ pid_t pid = fork();
+ if(pid == -1) {
+ fprintf(stderr, "Could not fork: %s\n", strerror(errno));
+ free(nargv);
+ return 1;
+ }
+
+ if(!pid)
+ exit(execvp(c, nargv));
- if(!strcasecmp(argv[optind], "reload")) {
- return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+ free(nargv);
+
+ int status = -1, result;
+#ifdef SIGINT
+ signal(SIGINT, SIG_IGN);
+#endif
+ result = waitpid(pid, &status, 0);
+#ifdef SIGINT
+ signal(SIGINT, SIG_DFL);
+#endif
+
+ if(result != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
+ fprintf(stderr, "Error starting %s\n", c);
+ return 1;
}
-
- if(!strcasecmp(argv[optind], "restart")) {
- return send_ctl_request_cooked(fd, REQ_RESTART, NULL, 0) != -1;
+
+ return 0;
+#endif
+}
+
+static int cmd_stop(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
}
- if(!strcasecmp(argv[optind], "dump")) {
- if(argc < optind + 2) {
- fprintf(stderr, _("Not enough arguments.\n"));
- usage(true);
- return 1;
- }
+#ifndef HAVE_MINGW
+ if(!connect_tincd(true)) {
+ if(pid) {
+ if(kill(pid, SIGTERM)) {
+ fprintf(stderr, "Could not send TERM signal to process with PID %u: %s\n", pid, strerror(errno));
+ return 1;
+ }
- if(!strcasecmp(argv[optind+1], "nodes")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_NODES, NULL, 0) != -1;
+ fprintf(stderr, "Sent TERM signal to process with PID %u.\n", pid);
+ waitpid(pid, NULL, 0);
+ return 0;
}
- if(!strcasecmp(argv[optind+1], "edges")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_EDGES, NULL, 0) != -1;
- }
+ return 1;
+ }
- if(!strcasecmp(argv[optind+1], "subnets")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_SUBNETS, NULL, 0) != -1;
- }
+ sendline(fd, "%d %d", CONTROL, REQ_STOP);
- if(!strcasecmp(argv[optind+1], "connections")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_CONNECTIONS, NULL, 0) != -1;
- }
+ while(recvline(fd, line, sizeof line)) {
+ // Wait for tincd to close the connection...
+ }
+#else
+ if(!remove_service())
+ return 1;
+#endif
+ close(fd);
+ pid = 0;
+ fd = -1;
- if(!strcasecmp(argv[optind+1], "graph")) {
- return send_ctl_request_cooked(fd, REQ_DUMP_GRAPH, NULL, 0) != -1;
- }
+ return 0;
+}
- fprintf(stderr, _("Unknown dump type '%s'.\n"), argv[optind+1]);
- usage(true);
+static int cmd_restart(int argc, char *argv[]) {
+ cmd_stop(1, argv);
+ return cmd_start(argc, argv);
+}
+
+static int cmd_reload(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
return 1;
}
- if(!strcasecmp(argv[optind], "purge")) {
- return send_ctl_request_cooked(fd, REQ_PURGE, NULL, 0) != -1;
+ if(!connect_tincd(true))
+ return 1;
+
+ sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RELOAD || result) {
+ fprintf(stderr, "Could not reload configuration.\n");
+ return 1;
}
- if(!strcasecmp(argv[optind], "debug")) {
- int debuglevel;
+ return 0;
+
+}
+
+static int cmd_dump(int argc, char *argv[]) {
+ bool only_reachable = false;
- if(argc != optind + 2) {
- fprintf(stderr, "Invalid arguments.\n");
+ if(argc > 2 && !strcasecmp(argv[1], "reachable")) {
+ if(strcasecmp(argv[2], "nodes")) {
+ fprintf(stderr, "`reachable' only supported for nodes.\n");
+ usage(true);
return 1;
}
- debuglevel = atoi(argv[optind+1]);
- return send_ctl_request_cooked(fd, REQ_SET_DEBUG, &debuglevel,
- sizeof debuglevel) != -1;
+ only_reachable = true;
+ argv++;
+ argc--;
}
- if(!strcasecmp(argv[optind], "retry")) {
- return send_ctl_request_cooked(fd, REQ_RETRY, NULL, 0) != -1;
+ if(argc != 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ usage(true);
+ return 1;
}
- if(!strcasecmp(argv[optind], "reload")) {
- return send_ctl_request_cooked(fd, REQ_RELOAD, NULL, 0) != -1;
+ if(!connect_tincd(true))
+ return 1;
+
+ int do_graph = 0;
+
+ if(!strcasecmp(argv[1], "nodes"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ else if(!strcasecmp(argv[1], "edges"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ else if(!strcasecmp(argv[1], "subnets"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
+ else if(!strcasecmp(argv[1], "connections"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
+ else if(!strcasecmp(argv[1], "graph")) {
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ do_graph = 1;
+ } else if(!strcasecmp(argv[1], "digraph")) {
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ do_graph = 2;
+ } else {
+ fprintf(stderr, "Unknown dump type '%s'.\n", argv[1]);
+ usage(true);
+ return 1;
}
- fprintf(stderr, _("Unknown command `%s'.\n"), argv[optind]);
- usage(true);
-
- close(fd);
+ if(do_graph == 1)
+ printf("graph {\n");
+ else if(do_graph == 2)
+ printf("digraph {\n");
+
+ while(recvline(fd, line, sizeof line)) {
+ char node1[4096], node2[4096];
+ int n = sscanf(line, "%d %d %s %s", &code, &req, node1, node2);
+ if(n == 2) {
+ if(do_graph && req == REQ_DUMP_NODES)
+ continue;
+ else {
+ if(do_graph)
+ printf("}\n");
+ return 0;
+ }
+ }
+ if(n < 2)
+ break;
+
+ char node[4096];
+ char id[4096];
+ char from[4096];
+ char to[4096];
+ char subnet[4096];
+ char host[4096];
+ char port[4096];
+ char local_host[4096];
+ char local_port[4096];
+ char via[4096];
+ char nexthop[4096];
+ int cipher, digest, maclength, compression, distance, socket, weight;
+ short int pmtu, minmtu, maxmtu;
+ unsigned int options, status_int;
+ node_status_t status;
+ long int last_state_change;
+
+ switch(req) {
+ case REQ_DUMP_NODES: {
+ 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);
+ if(n != 17) {
+ fprintf(stderr, "Unable to parse node dump from tincd: %s\n", line);
+ return 1;
+ }
+
+ memcpy(&status, &status_int, sizeof status);
+
+ if(do_graph) {
+ const char *color = "black";
+ if(!strcmp(host, "MYSELF"))
+ color = "green";
+ else if(!status.reachable)
+ color = "red";
+ else if(strcmp(via, node))
+ color = "orange";
+ else if(!status.validkey)
+ color = "black";
+ else if(minmtu > 0)
+ color = "green";
+ printf(" %s [label = \"%s\", color = \"%s\"%s];\n", node, node, color, strcmp(host, "MYSELF") ? "" : ", style = \"filled\"");
+ } else {
+ if(only_reachable && !status.reachable)
+ continue;
+ 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",
+ node, id, host, port, cipher, digest, maclength, compression, options, status_int, nexthop, via, distance, pmtu, minmtu, maxmtu);
+ }
+ } break;
+
+ case REQ_DUMP_EDGES: {
+ 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);
+ if(n != 8) {
+ fprintf(stderr, "Unable to parse edge dump from tincd.\n");
+ return 1;
+ }
+
+ if(do_graph) {
+ float w = 1 + 65536.0 / weight;
+ if(do_graph == 1 && strcmp(node1, node2) > 0)
+ printf(" %s -- %s [w = %f, weight = %f];\n", node1, node2, w, w);
+ else if(do_graph == 2)
+ printf(" %s -> %s [w = %f, weight = %f];\n", node1, node2, w, w);
+ } else {
+ 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);
+ }
+ } break;
+
+ case REQ_DUMP_SUBNETS: {
+ int n = sscanf(line, "%*d %*d %s %s", subnet, node);
+ if(n != 2) {
+ fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
+ return 1;
+ }
+ printf("%s owner %s\n", strip_weight(subnet), node);
+ } break;
+
+ case REQ_DUMP_CONNECTIONS: {
+ int n = sscanf(line, "%*d %*d %s %s port %s %x %d %x", node, host, port, &options, &socket, &status_int);
+ if(n != 6) {
+ fprintf(stderr, "Unable to parse connection dump from tincd.\n");
+ return 1;
+ }
+ printf("%s at %s port %s options %x socket %d status %x\n", node, host, port, options, socket, status_int);
+ } break;
+
+ default:
+ fprintf(stderr, "Unable to parse dump from tincd.\n");
+ return 1;
+ }
+ }
+
+ fprintf(stderr, "Error receiving dump.\n");
+ return 1;
+}
+
+static int cmd_purge(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ sendline(fd, "%d %d", CONTROL, REQ_PURGE);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_PURGE || result) {
+ fprintf(stderr, "Could not purge old information.\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int cmd_debug(int argc, char *argv[]) {
+ if(argc != 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ int debuglevel = atoi(argv[1]);
+ int origlevel;
+
+ sendline(fd, "%d %d %d", CONTROL, REQ_SET_DEBUG, debuglevel);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &origlevel) != 3 || code != CONTROL || req != REQ_SET_DEBUG) {
+ fprintf(stderr, "Could not set debug level.\n");
+ return 1;
+ }
+
+ fprintf(stderr, "Old level %d, new level %d.\n", origlevel, debuglevel);
+ return 0;
+}
+
+static int cmd_retry(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ sendline(fd, "%d %d", CONTROL, REQ_RETRY);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RETRY || result) {
+ fprintf(stderr, "Could not retry outgoing connections.\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int cmd_connect(int argc, char *argv[]) {
+ if(argc != 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ if(!check_id(argv[1])) {
+ fprintf(stderr, "Invalid name for node.\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ sendline(fd, "%d %d %s", CONTROL, REQ_CONNECT, argv[1]);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_CONNECT || result) {
+ fprintf(stderr, "Could not connect to %s.\n", argv[1]);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int cmd_disconnect(int argc, char *argv[]) {
+ if(argc != 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ if(!check_id(argv[1])) {
+ fprintf(stderr, "Invalid name for node.\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ sendline(fd, "%d %d %s", CONTROL, REQ_DISCONNECT, argv[1]);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_DISCONNECT || result) {
+ fprintf(stderr, "Could not disconnect %s.\n", argv[1]);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int cmd_top(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+#ifdef HAVE_CURSES
+ if(!connect_tincd(true))
+ return 1;
+
+ top(fd);
+ return 0;
+#else
+ fprintf(stderr, "This version of tinc was compiled without support for the curses library.\n");
+ return 1;
+#endif
+}
+
+static int cmd_pcap(int argc, char *argv[]) {
+ if(argc > 2) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ pcap(fd, stdout, argc > 1 ? atoi(argv[1]) : 0);
+ return 0;
+}
+
+#ifdef SIGINT
+static void sigint_handler(int sig) {
+ fprintf(stderr, "\n");
+ shutdown(fd, SHUT_RDWR);
+}
+#endif
+
+static int cmd_log(int argc, char *argv[]) {
+ if(argc > 2) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+#ifdef SIGINT
+ signal(SIGINT, sigint_handler);
+#endif
+
+ logcontrol(fd, stdout, argc > 1 ? atoi(argv[1]) : -1);
+
+#ifdef SIGINT
+ signal(SIGINT, SIG_DFL);
+#endif
+
+ close(fd);
+ fd = -1;
+ return 0;
+}
+
+static int cmd_pid(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true) && !pid)
+ return 1;
+
+ printf("%d\n", pid);
+ return 0;
+}
+
+int rstrip(char *value) {
+ int len = strlen(value);
+ while(len && strchr("\t\r\n ", value[len - 1]))
+ value[--len] = 0;
+ return len;
+}
+
+char *get_my_name(bool verbose) {
+ FILE *f = fopen(tinc_conf, "r");
+ if(!f) {
+ if(verbose)
+ fprintf(stderr, "Could not open %s: %s\n", tinc_conf, strerror(errno));
+ return NULL;
+ }
+
+ char buf[4096];
+ char *value;
+ while(fgets(buf, sizeof buf, f)) {
+ int len = strcspn(buf, "\t =");
+ value = buf + len;
+ value += strspn(value, "\t ");
+ if(*value == '=') {
+ value++;
+ value += strspn(value, "\t ");
+ }
+ if(!rstrip(value))
+ continue;
+ buf[len] = 0;
+ if(strcasecmp(buf, "Name"))
+ continue;
+ if(*value) {
+ fclose(f);
+ return replace_name(value);
+ }
+ }
+
+ fclose(f);
+ if(verbose)
+ fprintf(stderr, "Could not find Name in %s.\n", tinc_conf);
+ return NULL;
+}
+
+const var_t variables[] = {
+ /* Server configuration */
+ {"AddressFamily", VAR_SERVER},
+ {"AutoConnect", VAR_SERVER | VAR_SAFE},
+ {"BindToAddress", VAR_SERVER | VAR_MULTIPLE},
+ {"BindToInterface", VAR_SERVER},
+ {"Broadcast", VAR_SERVER | VAR_SAFE},
+ {"BroadcastSubnet", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
+ {"ConnectTo", VAR_SERVER | VAR_MULTIPLE | VAR_SAFE},
+ {"DecrementTTL", VAR_SERVER},
+ {"Device", VAR_SERVER},
+ {"DeviceStandby", VAR_SERVER},
+ {"DeviceType", VAR_SERVER},
+ {"DirectOnly", VAR_SERVER},
+ {"Ed25519PrivateKeyFile", VAR_SERVER},
+ {"ExperimentalProtocol", VAR_SERVER},
+ {"Forwarding", VAR_SERVER},
+ {"GraphDumpFile", VAR_SERVER | VAR_OBSOLETE},
+ {"Hostnames", VAR_SERVER},
+ {"IffOneQueue", VAR_SERVER},
+ {"Interface", VAR_SERVER},
+ {"KeyExpire", VAR_SERVER},
+ {"ListenAddress", VAR_SERVER | VAR_MULTIPLE},
+ {"LocalDiscovery", VAR_SERVER},
+ {"MACExpire", VAR_SERVER},
+ {"MaxConnectionBurst", VAR_SERVER},
+ {"MaxOutputBufferSize", VAR_SERVER},
+ {"MaxTimeout", VAR_SERVER},
+ {"Mode", VAR_SERVER | VAR_SAFE},
+ {"Name", VAR_SERVER},
+ {"PingInterval", VAR_SERVER},
+ {"PingTimeout", VAR_SERVER},
+ {"PriorityInheritance", VAR_SERVER},
+ {"PrivateKey", VAR_SERVER | VAR_OBSOLETE},
+ {"PrivateKeyFile", VAR_SERVER},
+ {"ProcessPriority", VAR_SERVER},
+ {"Proxy", VAR_SERVER},
+ {"ReplayWindow", VAR_SERVER},
+ {"ScriptsExtension", VAR_SERVER},
+ {"ScriptsInterpreter", VAR_SERVER},
+ {"StrictSubnets", VAR_SERVER},
+ {"TunnelServer", VAR_SERVER},
+ {"UDPDiscovery", VAR_SERVER},
+ {"UDPDiscoveryKeepaliveInterval", VAR_SERVER},
+ {"UDPDiscoveryInterval", VAR_SERVER},
+ {"UDPDiscoveryTimeout", VAR_SERVER},
+ {"MTUInfoInterval", VAR_SERVER},
+ {"UDPInfoInterval", VAR_SERVER},
+ {"UDPRcvBuf", VAR_SERVER},
+ {"UDPSndBuf", VAR_SERVER},
+ {"VDEGroup", VAR_SERVER},
+ {"VDEPort", VAR_SERVER},
+ /* Host configuration */
+ {"Address", VAR_HOST | VAR_MULTIPLE},
+ {"Cipher", VAR_SERVER | VAR_HOST},
+ {"ClampMSS", VAR_SERVER | VAR_HOST},
+ {"Compression", VAR_SERVER | VAR_HOST},
+ {"Digest", VAR_SERVER | VAR_HOST},
+ {"Ed25519PublicKey", VAR_HOST},
+ {"Ed25519PublicKeyFile", VAR_SERVER | VAR_HOST},
+ {"IndirectData", VAR_SERVER | VAR_HOST},
+ {"MACLength", VAR_SERVER | VAR_HOST},
+ {"PMTU", VAR_SERVER | VAR_HOST},
+ {"PMTUDiscovery", VAR_SERVER | VAR_HOST},
+ {"Port", VAR_HOST},
+ {"PublicKey", VAR_HOST | VAR_OBSOLETE},
+ {"PublicKeyFile", VAR_SERVER | VAR_HOST | VAR_OBSOLETE},
+ {"Subnet", VAR_HOST | VAR_MULTIPLE | VAR_SAFE},
+ {"TCPOnly", VAR_SERVER | VAR_HOST},
+ {"Weight", VAR_HOST | VAR_SAFE},
+ {NULL, 0}
+};
+
+static int cmd_config(int argc, char *argv[]) {
+ if(argc < 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ if(strcasecmp(argv[0], "config"))
+ argv--, argc++;
+
+ int action = -2;
+ if(!strcasecmp(argv[1], "get")) {
+ argv++, argc--;
+ } else if(!strcasecmp(argv[1], "add")) {
+ argv++, argc--, action = 1;
+ } else if(!strcasecmp(argv[1], "del")) {
+ argv++, argc--, action = -1;
+ } else if(!strcasecmp(argv[1], "replace") || !strcasecmp(argv[1], "set") || !strcasecmp(argv[1], "change")) {
+ argv++, argc--, action = 0;
+ }
+
+ if(argc < 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ // Concatenate the rest of the command line
+ strncpy(line, argv[1], sizeof line - 1);
+ for(int i = 2; i < argc; i++) {
+ strncat(line, " ", sizeof line - 1 - strlen(line));
+ strncat(line, argv[i], sizeof line - 1 - strlen(line));
+ }
+
+ // Liberal parsing into node name, variable name and value.
+ char *node = NULL;
+ char *variable;
+ char *value;
+ int len;
+
+ len = strcspn(line, "\t =");
+ value = line + len;
+ value += strspn(value, "\t ");
+ if(*value == '=') {
+ value++;
+ value += strspn(value, "\t ");
+ }
+ line[len] = '\0';
+ variable = strchr(line, '.');
+ if(variable) {
+ node = line;
+ *variable++ = 0;
+ } else {
+ variable = line;
+ }
+
+ if(!*variable) {
+ fprintf(stderr, "No variable given.\n");
+ return 1;
+ }
+
+ if(action >= 0 && !*value) {
+ fprintf(stderr, "No value for variable given.\n");
+ return 1;
+ }
+
+ if(action < -1 && *value)
+ action = 0;
+
+ /* Some simple checks. */
+ bool found = false;
+ bool warnonremove = false;
+
+ for(int i = 0; variables[i].name; i++) {
+ if(strcasecmp(variables[i].name, variable))
+ continue;
+
+ found = true;
+ variable = (char *)variables[i].name;
+
+ /* Discourage use of obsolete variables. */
+
+ if(variables[i].type & VAR_OBSOLETE && action >= 0) {
+ if(force) {
+ fprintf(stderr, "Warning: %s is an obsolete variable!\n", variable);
+ } else {
+ fprintf(stderr, "%s is an obsolete variable! Use --force to use it anyway.\n", variable);
+ return 1;
+ }
+ }
+
+ /* Don't put server variables in host config files */
+
+ if(node && !(variables[i].type & VAR_HOST) && action >= 0) {
+ if(force) {
+ fprintf(stderr, "Warning: %s is not a host configuration variable!\n", variable);
+ } else {
+ fprintf(stderr, "%s is not a host configuration variable! Use --force to use it anyway.\n", variable);
+ return 1;
+ }
+ }
+
+ /* Should this go into our own host config file? */
+
+ if(!node && !(variables[i].type & VAR_SERVER)) {
+ node = get_my_name(true);
+ if(!node)
+ return 1;
+ }
+
+ /* Change "add" into "set" for variables that do not allow multiple occurences.
+ Turn on warnings when it seems variables might be removed unintentionally. */
+
+ if(action == 1 && !(variables[i].type & VAR_MULTIPLE)) {
+ warnonremove = true;
+ action = 0;
+ } else if(action == 0 && (variables[i].type & VAR_MULTIPLE)) {
+ warnonremove = true;
+ }
+
+ break;
+ }
+
+ if(node && !check_id(node)) {
+ fprintf(stderr, "Invalid name for node.\n");
+ return 1;
+ }
+
+ if(!found) {
+ if(force || action < 0) {
+ fprintf(stderr, "Warning: %s is not a known configuration variable!\n", variable);
+ } else {
+ fprintf(stderr, "%s: is not a known configuration variable! Use --force to use it anyway.\n", variable);
+ return 1;
+ }
+ }
+
+ // Open the right configuration file.
+ char *filename;
+ if(node)
+ xasprintf(&filename, "%s" SLASH "%s", hosts_dir, node);
+ else
+ filename = tinc_conf;
+
+ FILE *f = fopen(filename, "r");
+ if(!f) {
+ fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+
+ char *tmpfile = NULL;
+ FILE *tf = NULL;
+
+ if(action >= -1) {
+ xasprintf(&tmpfile, "%s.config.tmp", filename);
+ tf = fopen(tmpfile, "w");
+ if(!tf) {
+ fprintf(stderr, "Could not open temporary file %s: %s\n", tmpfile, strerror(errno));
+ fclose(f);
+ return 1;
+ }
+ }
+
+ // Copy the file, making modifications on the fly, unless we are just getting a value.
+ char buf1[4096];
+ char buf2[4096];
+ bool set = false;
+ bool removed = false;
+ found = false;
+
+ while(fgets(buf1, sizeof buf1, f)) {
+ buf1[sizeof buf1 - 1] = 0;
+ strncpy(buf2, buf1, sizeof buf2);
+
+ // Parse line in a simple way
+ char *bvalue;
+ int len;
+
+ len = strcspn(buf2, "\t =");
+ bvalue = buf2 + len;
+ bvalue += strspn(bvalue, "\t ");
+ if(*bvalue == '=') {
+ bvalue++;
+ bvalue += strspn(bvalue, "\t ");
+ }
+ rstrip(bvalue);
+ buf2[len] = '\0';
+
+ // Did it match?
+ if(!strcasecmp(buf2, variable)) {
+ // Get
+ if(action < -1) {
+ found = true;
+ printf("%s\n", bvalue);
+ // Del
+ } else if(action == -1) {
+ if(!*value || !strcasecmp(bvalue, value)) {
+ removed = true;
+ continue;
+ }
+ // Set
+ } else if(action == 0) {
+ // Warn if "set" was used for variables that can occur multiple times
+ if(warnonremove && strcasecmp(bvalue, value))
+ fprintf(stderr, "Warning: removing %s = %s\n", variable, bvalue);
+
+ // Already set? Delete the rest...
+ if(set)
+ continue;
+
+ // Otherwise, replace.
+ if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
+ fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
+ return 1;
+ }
+ set = true;
+ continue;
+ // Add
+ } else if(action > 0) {
+ // Check if we've already seen this variable with the same value
+ if(!strcasecmp(bvalue, value))
+ found = true;
+ }
+ }
+
+ if(action >= -1) {
+ // Copy original line...
+ if(fputs(buf1, tf) < 0) {
+ fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
+ return 1;
+ }
+
+ // Add newline if it is missing...
+ if(*buf1 && buf1[strlen(buf1) - 1] != '\n') {
+ if(fputc('\n', tf) < 0) {
+ fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
+ return 1;
+ }
+ }
+ }
+ }
+
+ // Make sure we read everything...
+ if(ferror(f) || !feof(f)) {
+ fprintf(stderr, "Error while reading from configuration file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+
+ if(fclose(f)) {
+ fprintf(stderr, "Error closing configuration file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+
+ // Add new variable if necessary.
+ if((action > 0 && !found)|| (action == 0 && !set)) {
+ if(fprintf(tf, "%s = %s\n", variable, value) < 0) {
+ fprintf(stderr, "Error writing to temporary file %s: %s\n", tmpfile, strerror(errno));
+ return 1;
+ }
+ }
+
+ if(action < -1) {
+ if(found) {
+ return 0;
+ } else {
+ fprintf(stderr, "No matching configuration variables found.\n");
+ return 1;
+ }
+ }
+
+ // Make sure we wrote everything...
+ if(fclose(tf)) {
+ fprintf(stderr, "Error closing temporary file %s: %s\n", tmpfile, strerror(errno));
+ return 1;
+ }
+
+ // Could we find what we had to remove?
+ if(action < 0 && !removed) {
+ remove(tmpfile);
+ fprintf(stderr, "No configuration variables deleted.\n");
+ return 1;
+ }
+
+ // Replace the configuration file with the new one
+#ifdef HAVE_MINGW
+ if(remove(filename)) {
+ fprintf(stderr, "Error replacing file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+#endif
+ if(rename(tmpfile, filename)) {
+ fprintf(stderr, "Error renaming temporary file %s to configuration file %s: %s\n", tmpfile, filename, strerror(errno));
+ return 1;
+ }
+
+ // Silently try notifying a running tincd of changes.
+ if(connect_tincd(false))
+ sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
+
+ return 0;
+}
+
+static bool try_bind(int port) {
+ struct addrinfo *ai = NULL;
+ struct addrinfo hint = {
+ .ai_flags = AI_PASSIVE,
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ };
+
+ char portstr[16];
+ snprintf(portstr, sizeof portstr, "%d", port);
+
+ if(getaddrinfo(NULL, portstr, &hint, &ai) || !ai)
+ return false;
+
+ while(ai) {
+ int fd = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP);
+ if(!fd)
+ return false;
+ int result = bind(fd, ai->ai_addr, ai->ai_addrlen);
+ closesocket(fd);
+ if(result)
+ return false;
+ ai = ai->ai_next;
+ }
+
+ return true;
+}
+
+int check_port(char *name) {
+ if(try_bind(655))
+ return 655;
+
+ fprintf(stderr, "Warning: could not bind to port 655. ");
+
+ for(int i = 0; i < 100; i++) {
+ int port = 0x1000 + (rand() & 0x7fff);
+ if(try_bind(port)) {
+ char *filename;
+ xasprintf(&filename, "%s" SLASH "hosts" SLASH "%s", confbase, name);
+ FILE *f = fopen(filename, "a");
+ free(filename);
+ if(!f) {
+ fprintf(stderr, "Please change tinc's Port manually.\n");
+ return 0;
+ }
+
+ fprintf(f, "Port = %d\n", port);
+ fclose(f);
+ fprintf(stderr, "Tinc will instead listen on port %d.\n", port);
+ return port;
+ }
+ }
+
+ fprintf(stderr, "Please change tinc's Port manually.\n");
+ return 0;
+}
+
+static int cmd_init(int argc, char *argv[]) {
+ if(!access(tinc_conf, F_OK)) {
+ fprintf(stderr, "Configuration file %s already exists!\n", tinc_conf);
+ return 1;
+ }
+
+ if(argc > 2) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ } else if(argc < 2) {
+ if(tty) {
+ char buf[1024];
+ fprintf(stderr, "Enter the Name you want your tinc node to have: ");
+ if(!fgets(buf, sizeof buf, stdin)) {
+ fprintf(stderr, "Error while reading stdin: %s\n", strerror(errno));
+ return 1;
+ }
+ int len = rstrip(buf);
+ if(!len) {
+ fprintf(stderr, "No name given!\n");
+ return 1;
+ }
+ name = strdup(buf);
+ } else {
+ fprintf(stderr, "No Name given!\n");
+ return 1;
+ }
+ } else {
+ name = strdup(argv[1]);
+ if(!*name) {
+ fprintf(stderr, "No Name given!\n");
+ return 1;
+ }
+ }
+
+ if(!check_id(name)) {
+ fprintf(stderr, "Invalid Name! Only a-z, A-Z, 0-9 and _ are allowed characters.\n");
+ return 1;
+ }
+
+ if(!confbase_given && mkdir(confdir, 0755) && errno != EEXIST) {
+ fprintf(stderr, "Could not create directory %s: %s\n", confdir, strerror(errno));
+ return 1;
+ }
+
+ if(mkdir(confbase, 0777) && errno != EEXIST) {
+ fprintf(stderr, "Could not create directory %s: %s\n", confbase, strerror(errno));
+ return 1;
+ }
+
+ if(mkdir(hosts_dir, 0777) && errno != EEXIST) {
+ fprintf(stderr, "Could not create directory %s: %s\n", hosts_dir, strerror(errno));
+ return 1;
+ }
+
+ FILE *f = fopen(tinc_conf, "w");
+ if(!f) {
+ fprintf(stderr, "Could not create file %s: %s\n", tinc_conf, strerror(errno));
+ return 1;
+ }
+
+ fprintf(f, "Name = %s\n", name);
+ fclose(f);
+
+#ifndef DISABLE_LEGACY
+ if(!rsa_keygen(2048, false))
+ return 1;
+#endif
+
+ if(!ed25519_keygen(false))
+ return 1;
+
+ check_port(name);
+
+#ifndef HAVE_MINGW
+ char *filename;
+ xasprintf(&filename, "%s" SLASH "tinc-up", confbase);
+ if(access(filename, F_OK)) {
+ FILE *f = fopenmask(filename, "w", 0777);
+ if(!f) {
+ fprintf(stderr, "Could not create file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+ 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");
+ fclose(f);
+ }
+#endif
+
+ return 0;
+
+}
+
+static int cmd_generate_keys(int argc, char *argv[]) {
+#ifdef DISABLE_LEGACY
+ if(argc > 1) {
+#else
+ if(argc > 2) {
+#endif
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!name)
+ name = get_my_name(false);
+
+#ifndef DISABLE_LEGACY
+ if(!rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true))
+ return 1;
+#endif
+
+ if(!ed25519_keygen(true))
+ return 1;
+
+ return 0;
+}
+
+#ifndef DISABLE_LEGACY
+static int cmd_generate_rsa_keys(int argc, char *argv[]) {
+ if(argc > 2) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!name)
+ name = get_my_name(false);
+
+ return !rsa_keygen(argc > 1 ? atoi(argv[1]) : 2048, true);
+}
+#endif
+
+static int cmd_generate_ed25519_keys(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(!name)
+ name = get_my_name(false);
+
+ return !ed25519_keygen(true);
+}
+
+static int cmd_help(int argc, char *argv[]) {
+ usage(false);
+ return 0;
+}
+
+static int cmd_version(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ version();
+ return 0;
+}
+
+static int cmd_info(int argc, char *argv[]) {
+ if(argc != 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ if(!connect_tincd(true))
+ return 1;
+
+ return info(fd, argv[1]);
+}
+
+static const char *conffiles[] = {
+ "tinc.conf",
+ "tinc-up",
+ "tinc-down",
+ "subnet-up",
+ "subnet-down",
+ "host-up",
+ "host-down",
+ NULL,
+};
+
+static int cmd_edit(int argc, char *argv[]) {
+ if(argc != 2) {
+ fprintf(stderr, "Invalid number of arguments.\n");
+ return 1;
+ }
+
+ char *filename = NULL;
+
+ if(strncmp(argv[1], "hosts" SLASH, 6)) {
+ for(int i = 0; conffiles[i]; i++) {
+ if(!strcmp(argv[1], conffiles[i])) {
+ xasprintf(&filename, "%s" SLASH "%s", confbase, argv[1]);
+ break;
+ }
+ }
+ } else {
+ argv[1] += 6;
+ }
+
+ if(!filename) {
+ xasprintf(&filename, "%s" SLASH "%s", hosts_dir, argv[1]);
+ char *dash = strchr(argv[1], '-');
+ if(dash) {
+ *dash++ = 0;
+ if((strcmp(dash, "up") && strcmp(dash, "down")) || !check_id(argv[1])) {
+ fprintf(stderr, "Invalid configuration filename.\n");
+ return 1;
+ }
+ }
+ }
+
+ char *command;
+#ifndef HAVE_MINGW
+ xasprintf(&command, "\"%s\" \"%s\"", getenv("VISUAL") ?: getenv("EDITOR") ?: "vi", filename);
+#else
+ xasprintf(&command, "edit \"%s\"", filename);
+#endif
+ int result = system(command);
+ if(result)
+ return result;
+
+ // Silently try notifying a running tincd of changes.
+ if(connect_tincd(false))
+ sendline(fd, "%d %d", CONTROL, REQ_RELOAD);
+
+ return 0;
+}
+
+static int export(const char *name, FILE *out) {
+ char *filename;
+ xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
+ FILE *in = fopen(filename, "r");
+ if(!in) {
+ fprintf(stderr, "Could not open configuration file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+
+ fprintf(out, "Name = %s\n", name);
+ char buf[4096];
+ while(fgets(buf, sizeof buf, in)) {
+ if(strcspn(buf, "\t =") != 4 || strncasecmp(buf, "Name", 4))
+ fputs(buf, out);
+ }
+
+ if(ferror(in)) {
+ fprintf(stderr, "Error while reading configuration file %s: %s\n", filename, strerror(errno));
+ fclose(in);
+ return 1;
+ }
+
+ fclose(in);
+ return 0;
+}
+
+static int cmd_export(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ char *name = get_my_name(true);
+ if(!name)
+ return 1;
+
+ int result = export(name, stdout);
+ if(!tty)
+ fclose(stdout);
+
+ free(name);
+ return result;
+}
+
+static int cmd_export_all(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ DIR *dir = opendir(hosts_dir);
+ if(!dir) {
+ fprintf(stderr, "Could not open host configuration directory %s: %s\n", hosts_dir, strerror(errno));
+ return 1;
+ }
+
+ bool first = true;
+ int result = 0;
+ struct dirent *ent;
+
+ while((ent = readdir(dir))) {
+ if(!check_id(ent->d_name))
+ continue;
+
+ if(first)
+ first = false;
+ else
+ printf("#---------------------------------------------------------------#\n");
+
+ result |= export(ent->d_name, stdout);
+ }
+
+ closedir(dir);
+ if(!tty)
+ fclose(stdout);
+ return result;
+}
+
+static int cmd_import(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ FILE *in = stdin;
+ FILE *out = NULL;
+
+ char buf[4096];
+ char name[4096];
+ char *filename = NULL;
+ int count = 0;
+ bool firstline = true;
+
+ while(fgets(buf, sizeof buf, in)) {
+ if(sscanf(buf, "Name = %s", name) == 1) {
+ firstline = false;
+
+ if(!check_id(name)) {
+ fprintf(stderr, "Invalid Name in input!\n");
+ return 1;
+ }
+
+ if(out)
+ fclose(out);
+
+ free(filename);
+ xasprintf(&filename, "%s" SLASH "%s", hosts_dir, name);
+
+ if(!force && !access(filename, F_OK)) {
+ fprintf(stderr, "Host configuration file %s already exists, skipping.\n", filename);
+ out = NULL;
+ continue;
+ }
+
+ out = fopen(filename, "w");
+ if(!out) {
+ fprintf(stderr, "Error creating configuration file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+
+ count++;
+ continue;
+ } else if(firstline) {
+ fprintf(stderr, "Junk at the beginning of the input, ignoring.\n");
+ firstline = false;
+ }
+
+
+ if(!strcmp(buf, "#---------------------------------------------------------------#\n"))
+ continue;
+
+ if(out) {
+ if(fputs(buf, out) < 0) {
+ fprintf(stderr, "Error writing to host configuration file %s: %s\n", filename, strerror(errno));
+ return 1;
+ }
+ }
+ }
+
+ if(out)
+ fclose(out);
+
+ if(count) {
+ fprintf(stderr, "Imported %d host configuration files.\n", count);
+ return 0;
+ } else {
+ fprintf(stderr, "No host configuration files imported.\n");
+ return 1;
+ }
+}
+
+static int cmd_exchange(int argc, char *argv[]) {
+ return cmd_export(argc, argv) ?: cmd_import(argc, argv);
+}
+
+static int cmd_exchange_all(int argc, char *argv[]) {
+ return cmd_export_all(argc, argv) ?: cmd_import(argc, argv);
+}
+
+static int switch_network(char *name) {
+ if(fd >= 0) {
+ close(fd);
+ fd = -1;
+ }
+
+ free(confbase);
+ confbase = NULL;
+ free(pidfilename);
+ pidfilename = NULL;
+ free(logfilename);
+ logfilename = NULL;
+ free(unixsocketname);
+ unixsocketname = NULL;
+ free(tinc_conf);
+ free(hosts_dir);
+ free(prompt);
+
+ free(netname);
+ netname = strcmp(name, ".") ? xstrdup(name) : NULL;
+
+ xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
+ xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
+ xasprintf(&prompt, "%s> ", identname);
+
+ return 0;
+}
+
+static int cmd_network(int argc, char *argv[]) {
+ if(argc > 2) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ if(argc == 2)
+ return switch_network(argv[1]);
+
+ DIR *dir = opendir(confdir);
+ if(!dir) {
+ fprintf(stderr, "Could not read directory %s: %s\n", confdir, strerror(errno));
+ return 1;
+ }
+
+ struct dirent *ent;
+ while((ent = readdir(dir))) {
+ if(*ent->d_name == '.')
+ continue;
+
+ if(!strcmp(ent->d_name, "tinc.conf")) {
+ printf(".\n");
+ continue;
+ }
+
+ char *fname;
+ xasprintf(&fname, "%s/%s/tinc.conf", confdir, ent->d_name);
+ if(!access(fname, R_OK))
+ printf("%s\n", ent->d_name);
+ free(fname);
+ }
+
+ closedir(dir);
return 0;
}
+
+static int cmd_fsck(int argc, char *argv[]) {
+ if(argc > 1) {
+ fprintf(stderr, "Too many arguments!\n");
+ return 1;
+ }
+
+ return fsck(orig_argv[0]);
+}
+
+static const struct {
+ const char *command;
+ int (*function)(int argc, char *argv[]);
+ bool hidden;
+} commands[] = {
+ {"start", cmd_start},
+ {"stop", cmd_stop},
+ {"restart", cmd_restart},
+ {"reload", cmd_reload},
+ {"dump", cmd_dump},
+ {"purge", cmd_purge},
+ {"debug", cmd_debug},
+ {"retry", cmd_retry},
+ {"connect", cmd_connect},
+ {"disconnect", cmd_disconnect},
+ {"top", cmd_top},
+ {"pcap", cmd_pcap},
+ {"log", cmd_log},
+ {"pid", cmd_pid},
+ {"config", cmd_config, true},
+ {"add", cmd_config},
+ {"del", cmd_config},
+ {"get", cmd_config},
+ {"set", cmd_config},
+ {"init", cmd_init},
+ {"generate-keys", cmd_generate_keys},
+#ifndef DISABLE_LEGACY
+ {"generate-rsa-keys", cmd_generate_rsa_keys},
+#endif
+ {"generate-ed25519-keys", cmd_generate_ed25519_keys},
+ {"help", cmd_help},
+ {"version", cmd_version},
+ {"info", cmd_info},
+ {"edit", cmd_edit},
+ {"export", cmd_export},
+ {"export-all", cmd_export_all},
+ {"import", cmd_import},
+ {"exchange", cmd_exchange},
+ {"exchange-all", cmd_exchange_all},
+ {"invite", cmd_invite},
+ {"join", cmd_join},
+ {"network", cmd_network},
+ {"fsck", cmd_fsck},
+ {NULL, NULL},
+};
+
+#ifdef HAVE_READLINE
+static char *complete_command(const char *text, int state) {
+ static int i;
+
+ if(!state)
+ i = 0;
+ else
+ i++;
+
+ while(commands[i].command) {
+ if(!commands[i].hidden && !strncasecmp(commands[i].command, text, strlen(text)))
+ return xstrdup(commands[i].command);
+ i++;
+ }
+
+ return NULL;
+}
+
+static char *complete_dump(const char *text, int state) {
+ const char *matches[] = {"reachable", "nodes", "edges", "subnets", "connections", "graph", NULL};
+ static int i;
+
+ if(!state)
+ i = 0;
+ else
+ i++;
+
+ while(matches[i]) {
+ if(!strncasecmp(matches[i], text, strlen(text)))
+ return xstrdup(matches[i]);
+ i++;
+ }
+
+ return NULL;
+}
+
+static char *complete_config(const char *text, int state) {
+ static int i;
+
+ if(!state)
+ i = 0;
+ else
+ i++;
+
+ while(variables[i].name) {
+ char *dot = strchr(text, '.');
+ if(dot) {
+ if((variables[i].type & VAR_HOST) && !strncasecmp(variables[i].name, dot + 1, strlen(dot + 1))) {
+ char *match;
+ xasprintf(&match, "%.*s.%s", (int)(dot - text), text, variables[i].name);
+ return match;
+ }
+ } else {
+ if(!strncasecmp(variables[i].name, text, strlen(text)))
+ return xstrdup(variables[i].name);
+ }
+ i++;
+ }
+
+ return NULL;
+}
+
+static char *complete_info(const char *text, int state) {
+ static int i;
+ if(!state) {
+ i = 0;
+ if(!connect_tincd(false))
+ return NULL;
+ // Check the list of nodes
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
+ }
+
+ while(recvline(fd, line, sizeof line)) {
+ char item[4096];
+ int n = sscanf(line, "%d %d %s", &code, &req, item);
+ if(n == 2) {
+ i++;
+ if(i >= 2)
+ break;
+ else
+ continue;
+ }
+
+ if(n != 3) {
+ fprintf(stderr, "Unable to parse dump from tincd, n = %d, i = %d.\n", n, i);
+ break;
+ }
+
+ if(!strncmp(item, text, strlen(text)))
+ return xstrdup(strip_weight(item));
+ }
+
+ return NULL;
+}
+
+static char *complete_nothing(const char *text, int state) {
+ return NULL;
+}
+
+static char **completion (const char *text, int start, int end) {
+ char **matches = NULL;
+
+ if(!start)
+ matches = rl_completion_matches(text, complete_command);
+ else if(!strncasecmp(rl_line_buffer, "dump ", 5))
+ matches = rl_completion_matches(text, complete_dump);
+ else if(!strncasecmp(rl_line_buffer, "add ", 4))
+ matches = rl_completion_matches(text, complete_config);
+ else if(!strncasecmp(rl_line_buffer, "del ", 4))
+ matches = rl_completion_matches(text, complete_config);
+ else if(!strncasecmp(rl_line_buffer, "get ", 4))
+ matches = rl_completion_matches(text, complete_config);
+ else if(!strncasecmp(rl_line_buffer, "set ", 4))
+ matches = rl_completion_matches(text, complete_config);
+ else if(!strncasecmp(rl_line_buffer, "info ", 5))
+ matches = rl_completion_matches(text, complete_info);
+
+ return matches;
+}
+#endif
+
+static int cmd_shell(int argc, char *argv[]) {
+ xasprintf(&prompt, "%s> ", identname);
+ int result = 0;
+ char buf[4096];
+ char *line = NULL;
+ int maxargs = argc + 16;
+ char **nargv = xmalloc(maxargs * sizeof *nargv);
+
+ for(int i = 0; i < argc; i++)
+ nargv[i] = argv[i];
+
+#ifdef HAVE_READLINE
+ rl_readline_name = "tinc";
+ rl_completion_entry_function = complete_nothing;
+ rl_attempted_completion_function = completion;
+ rl_filename_completion_desired = 0;
+ char *copy = NULL;
+#endif
+
+ while(true) {
+#ifdef HAVE_READLINE
+ if(tty) {
+ free(copy);
+ free(line);
+ rl_basic_word_break_characters = "\t\n ";
+ line = readline(prompt);
+ if(line)
+ copy = xstrdup(line);
+ } else {
+ line = fgets(buf, sizeof buf, stdin);
+ }
+#else
+ if(tty)
+ fputs(prompt, stdout);
+
+ line = fgets(buf, sizeof buf, stdin);
+#endif
+
+ if(!line)
+ break;
+
+ /* Ignore comments */
+
+ if(*line == '#')
+ continue;
+
+ /* Split */
+
+ int nargc = argc;
+ char *p = line + strspn(line, " \t\n");
+ char *next = strtok(p, " \t\n");
+
+ while(p && *p) {
+ if(nargc >= maxargs) {
+ fprintf(stderr, "next %p '%s', p %p '%s'\n", next, next, p, p);
+ abort();
+ maxargs *= 2;
+ nargv = xrealloc(nargv, maxargs * sizeof *nargv);
+ }
+
+ nargv[nargc++] = p;
+ p = next;
+ next = strtok(NULL, " \t\n");
+ }
+
+ if(nargc == argc)
+ continue;
+
+ if(!strcasecmp(nargv[argc], "exit") || !strcasecmp(nargv[argc], "quit"))
+ return result;
+
+ bool found = false;
+
+ for(int i = 0; commands[i].command; i++) {
+ if(!strcasecmp(nargv[argc], commands[i].command)) {
+ result |= commands[i].function(nargc - argc - 1, nargv + argc + 1);
+ found = true;
+ break;
+ }
+ }
+
+#ifdef HAVE_READLINE
+ if(tty && found)
+ add_history(copy);
+#endif
+
+ if(!found) {
+ fprintf(stderr, "Unknown command `%s'.\n", nargv[argc]);
+ result |= 1;
+ }
+ }
+
+ free(nargv);
+
+ if(tty)
+ printf("\n");
+ return result;
+}
+
+
+int main(int argc, char *argv[]) {
+ program_name = argv[0];
+ orig_argv = argv;
+ orig_argc = argc;
+ tty = isatty(0) && isatty(1);
+
+ if(!parse_options(argc, argv))
+ return 1;
+
+ make_names();
+ xasprintf(&tinc_conf, "%s" SLASH "tinc.conf", confbase);
+ xasprintf(&hosts_dir, "%s" SLASH "hosts", confbase);
+
+ if(show_version) {
+ version();
+ return 0;
+ }
+
+ if(show_help) {
+ usage(false);
+ return 0;
+ }
+
+#ifdef HAVE_MINGW
+ static struct WSAData wsa_state;
+
+ if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
+ fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
+ return false;
+ }
+#endif
+
+ srand(time(NULL));
+ crypto_init();
+
+ if(optind >= argc)
+ return cmd_shell(argc, argv);
+
+ for(int i = 0; commands[i].command; i++) {
+ if(!strcasecmp(argv[optind], commands[i].command))
+ return commands[i].function(argc - optind, argv + optind);
+ }
+
+ fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);
+ usage(true);
+ return 1;
+}