/*
tincctl.c -- Controlling a running tincd
- Copyright (C) 2007 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 2007-2009 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 <openssl/rand.h>
-#include <openssl/rsa.h>
-#include <openssl/pem.h>
-#include <openssl/evp.h>
-#include <openssl/engine.h>
-
#include <getopt.h>
-#include "conf.h"
-#include "protocol.h"
#include "xalloc.h"
+#include "protocol.h"
+#include "control_common.h"
+#include "rsagen.h"
+#include "utils.h"
/* The name this program was run with. */
char *program_name = NULL;
/* If nonzero, generate public/private keypair for this host/net. */
int generate_keys = 0;
-char *identname = NULL; /* program name for syslog */
-char *pidfilename = NULL; /* pid file location */
-char *controlfilename = NULL; /* pid file location */
-char *confbase = NULL;
+static char *name = NULL;
+static char *identname = NULL; /* program name for syslog */
+static char *controlcookiename = NULL; /* cookie file location */
+static char controlcookie[1024];
char *netname = NULL;
+char *confbase = NULL;
-static int status;
+#ifdef HAVE_MINGW
+static struct WSAData wsa_state;
+#endif
static struct option const long_options[] = {
{"config", required_argument, NULL, 'c'},
{"net", required_argument, NULL, 'n'},
{"help", no_argument, NULL, 1},
{"version", no_argument, NULL, 2},
- {"pidfile", required_argument, NULL, 5},
+ {"controlcookie", required_argument, NULL, 5},
{NULL, 0, NULL, 0}
};
static void usage(bool status) {
if(status)
- fprintf(stderr, _("Try `%s --help\' for more information.\n"),
+ 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"
- " --pidfile=FILENAME Write PID to FILENAME.\n"
- " --help Display this help and exit.\n"
- " --version Output version information and exit.\n"
+ 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"
+ " --controlcookie=FILENAME Read control socket from FILENAME.\n"
+ " --help Display this help and exit.\n"
+ " --version Output version information and exit.\n"
+ "\n"
"Valid commands are:\n"
" start Start tincd.\n"
" stop Stop tincd.\n"
" restart Restart tincd.\n"
" reload Reload configuration of running tincd.\n"
- " genkey [bits] Generate a new public/private keypair.\n"
+ " pid Show PID of currently running tincd.\n"
+ " generate-keys [bits] Generate a new public/private keypair.\n"
" dump Dump a list of one of the following things:\n"
" 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"
- "\n"));
- printf(_("Report bugs to tinc@tinc-vpn.org.\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");
}
}
show_version = true;
break;
- case 5: /* write PID to a file */
- pidfilename = xstrdup(optarg);
+ case 5: /* open control socket here */
+ controlcookiename = xstrdup(optarg);
break;
case '?':
return true;
}
-/* This function prettyprints the key generation process */
+FILE *ask_and_open(const char *filename, const char *what, const char *mode) {
+ FILE *r;
+ char *directory;
+ char buf[PATH_MAX];
+ char buf2[PATH_MAX];
+ size_t len;
+
+ /* Check stdin and stdout */
+ if(isatty(0) && isatty(1)) {
+ /* Ask for a file and/or directory name. */
+ fprintf(stdout, "Please enter a file to save %s to [%s]: ",
+ what, filename);
+ fflush(stdout);
+
+ if(fgets(buf, sizeof buf, stdin) < 0) {
+ fprintf(stderr, "Error while reading stdin: %s\n",
+ strerror(errno));
+ return NULL;
+ }
-static void indicator(int a, int b, void *p) {
- switch (a) {
- case 0:
- fprintf(stderr, ".");
- break;
+ len = strlen(buf);
+ if(len)
+ buf[--len] = 0;
- case 1:
- fprintf(stderr, "+");
- break;
+ if(len)
+ filename = buf;
+ }
- case 2:
- fprintf(stderr, "-");
- break;
+#ifdef HAVE_MINGW
+ if(filename[0] != '\\' && filename[0] != '/' && !strchr(filename, ':')) {
+#else
+ if(filename[0] != '/') {
+#endif
+ /* The directory is a relative path or a filename. */
+ directory = get_current_dir_name();
+ snprintf(buf2, sizeof buf2, "%s/%s", directory, filename);
+ filename = buf2;
+ }
- case 3:
- switch (b) {
- case 0:
- fprintf(stderr, " p\n");
- break;
+ umask(0077); /* Disallow everything for group and other */
- case 1:
- fprintf(stderr, " q\n");
- break;
+ /* Open it first to keep the inode busy */
- default:
- fprintf(stderr, "?");
- }
- break;
+ r = fopen(filename, mode);
- default:
- fprintf(stderr, "?");
+ if(!r) {
+ fprintf(stderr, "Error opening file `%s': %s\n", filename, strerror(errno));
+ return NULL;
}
+
+ return r;
}
/*
them in.
*/
static bool keygen(int bits) {
- RSA *rsa_key;
+ rsa_t key;
FILE *f;
- char *name = NULL;
char *filename;
- fprintf(stderr, _("Generating %d bits keys:\n"), bits);
- rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
+ fprintf(stderr, "Generating %d bits keys:\n", bits);
- if(!rsa_key) {
- fprintf(stderr, _("Error during key generation!\n"));
+ if(!rsa_generate(&key, bits, 0x10001)) {
+ 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(&filename, "%s/rsa_key.priv", confbase);
+ f = ask_and_open(filename, "private RSA key", "a");
if(!f)
return false;
#endif
if(ftell(f))
- fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
+ 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);
- PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
fclose(f);
free(filename);
if(name)
- asprintf(&filename, "%s/hosts/%s", confbase, name);
+ xasprintf(&filename, "%s/hosts/%s", confbase, name);
else
- asprintf(&filename, "%s/rsa_key.pub", confbase);
+ xasprintf(&filename, "%s/rsa_key.pub", confbase);
- f = ask_and_open(filename, _("public RSA key"), "a");
+ f = ask_and_open(filename, "public RSA key", "a");
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"));
+ 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);
- PEM_write_RSAPublicKey(f, rsa_key);
fclose(f);
free(filename);
#ifdef HAVE_MINGW
HKEY key;
char installdir[1024] = "";
- long len = sizeof(installdir);
+ long len = sizeof installdir;
#endif
if(netname)
- asprintf(&identname, "tinc.%s", netname);
+ xasprintf(&identname, "tinc.%s", netname);
else
identname = xstrdup("tinc");
#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);
+ xasprintf(&confbase, "%s/%s", installdir, netname);
else
- asprintf(&confbase, "%s", installdir);
+ xasprintf(&confbase, "%s", installdir);
}
}
+ if(!controlcookiename)
+ xasprintf(&controlcookiename, "%s/cookie", confbase);
RegCloseKey(key);
if(*installdir)
return;
}
#endif
- if(!pidfilename)
- asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
-
- asprintf(&controlfilename, LOCALSTATEDIR "/run/%s.control", identname);
+ if(!controlcookiename)
+ xasprintf(&controlcookiename, "%s/run/%s.cookie", LOCALSTATEDIR, identname);
if(netname) {
if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc/%s", netname);
+ xasprintf(&confbase, CONFDIR "/tinc/%s", netname);
else
- fprintf(stderr, _("Both netname and configuration directory given, using the latter...\n"));
+ fprintf(stderr, "Both netname and configuration directory given, using the latter...\n");
} else {
if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc");
+ xasprintf(&confbase, CONFDIR "/tinc");
}
}
-int main(int argc, char **argv) {
+static bool recvline(int fd, char *line, size_t len) {
+ static char buffer[4096];
+ static size_t blen = 0;
+ char *newline = NULL;
+
+ while(!(newline = memchr(buffer, '\n', blen))) {
+ int result = recv(fd, buffer + blen, sizeof buffer - blen, 0);
+ if(result == -1 && errno == EINTR)
+ continue;
+ else if(result <= 0)
+ return false;
+ blen += result;
+ }
+
+ if(newline - buffer >= len)
+ return false;
+
+ len = newline - buffer;
+
+ memcpy(line, buffer, len);
+ line[len] = 0;
+ memmove(buffer, newline + 1, blen - len - 1);
+ blen -= len + 1;
+
+ return true;
+}
+
+static bool sendline(int fd, char *format, ...) {
+ static char buffer[4096];
+ char *p = buffer;
+ size_t blen = 0;
+ va_list ap;
+
+ va_start(ap, format);
+ blen = vsnprintf(buffer, sizeof buffer, format, ap);
+ va_end(ap);
+
+ if(blen < 0 || blen >= sizeof buffer)
+ return false;
+
+ buffer[blen] = '\n';
+ blen++;
+
+ while(blen) {
+ int result = send(fd, p, blen, 0);
+ if(result == -1 && errno == EINTR)
+ continue;
+ else if(result <= 0);
+ return false;
+ p += result;
+ blen -= result;
+ }
+
+ return true;
+}
+
+int main(int argc, char *argv[], char *envp[]) {
int fd;
- struct sockaddr_un addr;
- program_name = argv[0];
+ int result;
+ int port;
+ int pid;
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
+ program_name = argv[0];
if(!parse_options(argc, argv))
return 1;
make_names();
if(show_version) {
- printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
+ 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"
+ printf("Copyright (C) 1998-2009 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"));
+ "see the file COPYING for details.\n");
return 0;
}
return 0;
}
- if(strlen(controlfilename) >= sizeof addr.sun_path) {
- fprintf(stderr, _("Control socket filename too long!\n"));
+ if(optind >= argc) {
+ fprintf(stderr, "Not enough arguments.\n");
+ usage(true);
return 1;
}
- fd = socket(PF_UNIX, SOCK_STREAM, 0);
- if(fd < 0) {
- fprintf(stderr, _("Cannot create UNIX socket: %s\n"), strerror(errno));
+ // First handle commands that don't involve connecting to a running tinc daemon.
+
+ if(!strcasecmp(argv[optind], "generate-keys")) {
+ return !keygen(optind > argc ? atoi(argv[optind + 1]) : 2048);
+ }
+
+ if(!strcasecmp(argv[optind], "start")) {
+ argv[optind] = NULL;
+ execve(SBINDIR "/tincd", argv, envp);
+ fprintf(stderr, "Could not start tincd: %s", strerror(errno));
+ return 1;
+ }
+
+ /*
+ * 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.
+ */
+
+ FILE *f = fopen(controlcookiename, "r");
+ if(!f) {
+ fprintf(stderr, "Could not open control socket cookie file %s: %s\n", controlcookiename, strerror(errno));
+ return 1;
+ }
+ if(fscanf(f, "%1024s %d %d", controlcookie, &port, &pid) != 3) {
+ fprintf(stderr, "Could not parse control socket cookie file %s\n", controlcookiename);
+ return 1;
+ }
+
+#ifdef HAVE_MINGW
+ if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
+ fprintf(stderr, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
return 1;
}
+#endif
+ struct sockaddr_in addr;
memset(&addr, 0, sizeof addr);
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, controlfilename, sizeof addr.sun_path - 1);
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = htonl(0x7f000001);
+ addr.sin_port = htons(port);
+
+ fd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if(fd < 0) {
+ fprintf(stderr, "Cannot create TCP socket: %s\n", sockstrerror(sockerrno));
+ return 1;
+ }
+
+#ifdef HAVE_MINGW
+ unsigned long arg = 0;
+
+ if(ioctlsocket(fd, FIONBIO, &arg) != 0) {
+ fprintf(stderr, "ioctlsocket failed: %s", sockstrerror(sockerrno));
+ }
+#endif
if(connect(fd, (struct sockaddr *)&addr, sizeof addr) < 0) {
- fprintf(stderr, _("Cannot connect to %s: %s\n"), controlfilename, strerror(errno));
+
+ fprintf(stderr, "Cannot connect to %s: %s\n", controlcookiename, sockstrerror(sockerrno));
return 1;
}
- printf("Connected to %s.\n", controlfilename);
+ char line[4096];
+ char data[4096];
+ int code, version, req;
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %s %d", &code, data, &version) != 3 || code != 0) {
+ fprintf(stderr, "Cannot read greeting from control socket: %s\n",
+ sockstrerror(sockerrno));
+ 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) {
+ fprintf(stderr, "Could not fully establish control socket connection\n");
+ return 1;
+ }
+
+ if(!strcasecmp(argv[optind], "pid")) {
+ printf("%d\n", pid);
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "stop")) {
+ sendline(fd, "%d %d", CONTROL, REQ_STOP);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_STOP || result) {
+ fprintf(stderr, "Could not stop tinc daemon\n");
+ return 1;
+ }
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "reload")) {
+ 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 tinc daemon\n");
+ return 1;
+ }
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "restart")) {
+ sendline(fd, "%d %d", CONTROL, REQ_RESTART);
+ if(!recvline(fd, line, sizeof line) || sscanf(line, "%d %d %d", &code, &req, &result) != 3 || code != CONTROL || req != REQ_RESTART || result) {
+ fprintf(stderr, "Could not restart tinc daemon\n");
+ return 1;
+ }
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "retry")) {
+ 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;
+ }
+
+ if(!strcasecmp(argv[optind], "dump")) {
+ if(argc < optind + 2) {
+ fprintf(stderr, "Not enough arguments.\n");
+ usage(true);
+ return 1;
+ }
+
+ bool do_graph = false;
+ int dumps = 1;
+
+ if(!strcasecmp(argv[optind+1], "nodes"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ else if(!strcasecmp(argv[optind+1], "edges"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ else if(!strcasecmp(argv[optind+1], "subnets"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_SUBNETS);
+ else if(!strcasecmp(argv[optind+1], "connections"))
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_CONNECTIONS);
+ else if(!strcasecmp(argv[optind+1], "graph")) {
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_NODES);
+ sendline(fd, "%d %d", CONTROL, REQ_DUMP_EDGES);
+ do_graph = true;
+ dumps = 2;
+ printf("digraph {\n");
+ } else {
+ fprintf(stderr, "Unknown dump type '%s'.\n", argv[optind+1]);
+ usage(true);
+ return 1;
+ }
+
+ while(recvline(fd, line, sizeof line)) {
+ char node1[4096], node2[4096];
+ int n = sscanf(line, "%d %d %s to %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;
+
+ if(!do_graph)
+ printf("%s\n", line + 5);
+ else {
+ if(req == REQ_DUMP_NODES)
+ printf(" %s [label = \"%s\"];\n", node1, node1);
+ else
+ printf(" %s -> %s;\n", node1, node2);
+ }
+ }
+
+ fprintf(stderr, "Error receiving dump\n");
+ return 1;
+ }
+
+ if(!strcasecmp(argv[optind], "purge")) {
+ 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 tinc daemon\n");
+ return 1;
+ }
+ return 0;
+ }
+
+ if(!strcasecmp(argv[optind], "debug")) {
+ int debuglevel, origlevel;
+
+ if(argc != optind + 2) {
+ fprintf(stderr, "Invalid arguments.\n");
+ return 1;
+ }
+ debuglevel = atoi(argv[optind+1]);
+
+ 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 purge tinc daemon\n");
+ return 1;
+ }
+
+ fprintf(stderr, "Old level %d, new level %d\n", origlevel, debuglevel);
+ return 0;
+ }
+
+ fprintf(stderr, "Unknown command `%s'.\n", argv[optind]);
+ usage(true);
+
close(fd);
return 0;